FIELD OF INVENTION
The present invention relates to the field of basic oxygen furnace processing.
More particularly, the present invention relates to Converter tapping slag stopping mechanism.
Even more particularly, the present invention relates to an improved high strength converter tapping slag stopping mechanism which can improve the operation efficiency of the system.
BACKGROUND AND PRIOR ART OF THE INVENTION
The converter is a type of steelmaking furnace. The furnace body is cylindrical, and the frame can rotate on a horizontal axle frame. It is an important link to improve the quality of molten steel to reduce the amount of slag discharged in the tapping process of the converter, and it is also one of the difficult problems that affect the development of steelmaking for a long time. In order to optimize converter slag blocking technology at home and abroad, more than ten kinds of slag blocking methods have been invented, including slag blocking cap, slag blocking the ball, floating plug, pneumatic slag blocking method, electromagnetic slag blocking method, vacuum slag suction method, siphon tapping method, etc. However, the success rate of slag blocking is low and the effect is not ideal. And because the slag blocking mechanism is located in a high-temperature smelting area, the slag blocking mechanism is easily deformed by high-temperature baking in the converter blowing process, and cannot be used after a long period of time or even burned, thus having to be replaced frequently.
The existing converter slag blocking mechanism is complex in structure, inconvenient to install and time-consuming and laborious. Also, the wheel axle - roller type slag blocking mechanism will cause safety risks due to abrasion of the wheel axle and breakage of the wheel axle. The plane sliding slag blocking machine may get stuck during operation, causing safety risks.
The present invention provides solution to the problems with existing technology and proposes a high strength converter tapping slag stopping mechanism which is capable of increasing the operating efficiency.
Reference may be made to Chinese Patent application bearing no. CN105400925A, titled “Converter slag stopping device rapidly replaceable on line and installation method thereof”. The invention discloses a converter slag stopping device rapidly replaceable on line. The converter slag stopping device comprises a connection board, an oil cylinder assembly, a fixed sliding brick installation framework, a slidable sliding brick installation
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framework, a sliding brick compressing framework, a slag stopping plate, a wedge-form positioning block, a guiding device and a bolt assembly, wherein the oil cylinder assembly comprises an oil cylinder, an oil cylinder support, an oil cylinder connection handle and an oil cylinder connection handle pin. The invention also provides an installation method for the converter slag stopping device rapidly replaceable on line. According to a technical scheme, the installation method comprises the following steps: step 1, rocking a converter so as to allow a tap hole of the converter to move to a place in front of the converter; step 2, hoisting the slag stopping device to a connection board with a sling and rocking the converter when the slag stopping device is close to the tap hole of the converter; step 3, slowing dropping the slag stopping device to allow the lower plane of the wedge-form positioning block of the slag stopping device to fit a wedge-form positioning and guiding device of the connection board; and step 4, applying an external force on the slag stopping device and compressing bolts to lock the converter slag stopping device so as to finish installation. The method realizes on-line rapid installation or replacing of the converter slag stopping device, improves installation or replacing efficiency, reduces labour intensity and eliminates potential safety hazards.
Another reference may be made to Chinese Patent application bearing no. CN103525973A, titled “Converter mechanism for slag blocking and steel tapping through sliding plates” by Maanshan Lier Kaiyuan New Material Co., Ltd. The invention discloses a converter mechanism for slag blocking and steel tapping through sliding plates. A fixed frame is fixed on a connecting plate, an opening and closing frame is connected to the fixed frame through a hinge pin roll, a sliding frame is arranged inside the opening and closing frame, slidable sliding rails and fixed sliding rails are correspondingly arranged on two sides of the sliding frame and the opening and closing frame respectively, an inner nozzle brick is installed inside the fixed frame and pressed tightly by an inner nozzle pressing plate, an inner sliding plate brick is installed inside the fixed frame, an outer sliding plate brick is installed inside the sliding frame, an outer nozzle brick is installed inside an outer nozzle base and pushed against tightly by an outer nozzle pusher, and a driving device is located at the top of the sliding frame and connected with the sliding frame through a pin roll. According to the converter mechanism, the safety of the whole mechanism is greatly improved, the service life of the whole mechanism is greatly prolonged, the system pressurization operation is free from influence of manual operation factors, the equilibrium and the stability of the surface pressure between the inner sliding plate and the outer sliding plate are guaranteed, and steel leakage accidents are effectively reduced.
Another reference may be made to Chinese Patent application bearing no. CN202139256U, titled “Slag-blocking gate valve mechanism for steel-tapping hole of
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converter”. The utility model relates to a slag-blocking gate valve mechanism for a steel-tapping hole of a converter. The slag-blocking gate valve mechanism comprises a fixed frame, a switching frame, a sliding frame, a fixed sliding plate brick, a movable sliding plate brick both, an outer nozzle brick, an outer nozzle fixed frame, and an outer nozzle mounting frame, wherein the middle parts of the fixed sliding plate brick and the moveable sliding plate brick are provided with holes; the fixed frame and the switching frame are arranged from the top to the bottom and are connected with each other through a pin shaft; the sliding frame is arranged in the switching frame; the fixed sliding brick is fixed in the fixed frame; the movable sliding plate brick and the outer nozzle brick are fixed in the sliding frame from the top to the bottom; the upper surface and the lower surface of the movable sliding brick are respectively contacted with the fixed sliding plate brick and the outer nozzle brick; a sliding guide rail on the lower surface of the sliding frame is contacted with a fixed guide rail on the upper surface of the switching frame; an outer nozzle mounting frame fixed on the sliding frame is arranged between the switching frame and the outer nozzle brick; and the outer nozzle fixed frame is arranged between the outer nozzle mounting frame and the recess of the outside diameter of the lower part of the outer nozzle brick. The structure can be staggered in a sliding way through two sliding plate bricks with holes; and the steel-tapping hole is opened or closed to block the slag and discharge the steel.
A further reference may be made to United States Patent application bearing no. CN106086297A, titled “Sliding water nozzle device for slag blocking of converter”. The invention discloses a sliding water nozzle device for slag blocking of a converter. The sliding water nozzle device is characterized in that F-shaped fixed door shaft seats are arranged on the two sides of a fixed frame; the distance from the central holes of the F-shaped fixed door shaft seats to the groove bottom of an inner sliding brick groove is 172 to 177 mm; T-shaped spring chambers are arranged on the two sides of an opening-closing frame, so that the widths of spring pressing plates and slide rails are taken in consideration; the upper and lower sides of the spring chambers are thickened and are provided with movable door shaft holes; the fixed frame is fixed to a debugging frame; the door opening angle is 110 degrees or above; the interference phenomenon is prevented; during pressurization operation, surface pressure bolts penetrate through the spring pressing plates, springs and the opening-closing frame to be screwed on the fixed frame; and surface pressure is uniformly transmitted between an inner slide brick and an outer sliding brick through the slide rails. According to the sliding water nozzle device for slag blocking of the converter provided by the invention, the door opening angle is large, the spring pressure fluctuation is small, the surface pressure transmission is uniform and constant, the off-line operation is convenient, the maintenance is simple, the cost is low,
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and the safety performance is good, and the device is an ideal substitute product of conventional converter slag blocking devices of which the weight is 180 tons or below.
Another reference may be made to Chinese Patent application bearing no. CN203487171U, titled “Sliding plate slag-stopping tapping converter mechanism”. The utility model discloses a sliding plate slag-stopping tapping converter mechanism. A fixed frame is fixed on a connecting plate, an open-close frame is connected with the fixed frame through a hinge pin shaft, a sliding frame is arranged in the open-close frame, and two sides of each of the sliding frame and the open-close frame are correspondingly provided with movable sliding rails and fixed sliding rails; an inner nozzle brick is arranged in the fixed frame and pressed through an inner nozzle press plate, an inner slide brick is arranged in the fixed frame, an outer slide brick is arranged in the sliding frame, an outer nozzle brick is arranged in an outer nozzle seat and is tightly pushed through an outer nozzle pushing machine, and a driving device is arranged at the top of the sliding frame and connected with the sliding frame through a pin shaft. The security and the service life of the whole mechanism are obviously improved and prolonged, the system pressurizing operation is free from the influence of manual operation, the balance and stabilization of the surface pressure between an inner slide plate and an outer slide plate are guaranteed, and the probability of steel breakout accident is effectively reduced.
A further reference may be made to United States Patent application bearing no. CN101974664A, titled “Slag controlling and steel tapping device for slide gate nozzle of converter steel tapping hole”. The invention discloses a slag controlling and steel tapping device for a slide gate nozzle of a converter steel tapping device, and belongs to a converter steel tapping device. The device is characterized in that: the upper end and the lower end of a left spring box and a right spring box are respectively provided with an end axle which is formed integrally with the spring box; the left side and the right side of a mounting plate are provided with rectangular grooves correspondingly; and pin shafts for hinging hooks are penetrated in the grooves; the hook head of each hook hooks each end axle on the left spring box and the right spring box correspondingly; the horizontal centre line of each spring box is consistent with the horizontal centre line of a steel flowing hole of a fixed slide gate brick; compression springs are arranged in both the left spring box and the right spring box; the front plane of the fixed slide gate brick on the mounting plate is slightly higher than the plane of the mounting plate; the alloy sliders are arranged on the side surfaces between an upper roller and a lower roller on the left side and the right side of a sliding frame; the back side surface of each alloy slider is slightly lower than the roller edge of each roller; steel flowing holes reserved on a sliding slide gate brick and the fixed slide gate brick are in center-bias in a length
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direction; the locking force of each spring box is constant; the device is more convenient to maintain and replace; and a slag stopping effect is good.
Another reference may be made to European Patent application bearing no. EP0603480A2, titled “Sliding closure in particular for a converter holding a bath of molten metal”. The sliding closure (20) is arranged at an outlet (15) of a converter (10) containing a bath of molten metal and has a refractory base plate and a refractory slide plate for the purpose of opening and closing the converter outlet. Preferably three additional refractory closure plates are sealingly arranged between the base plate (22) and slide plate (24), which closure plates are either fixedly secured to the base plate (22) or else are displaceable together with the slide plate (24). A decisive factor in the present invention is also that a number of closure plates (23) are provided between the slide plate (24) and the base plate (22) such that with these an overall plate durability is achieved which corresponds to that of the refractory sleeves (16) used for the tap hole. During the operation of the converter (10), first of all only the slide plate (24) is displaced, while the closure plates (23) are held immovably with their flow-through openings concentric to that of the base plate (22). When the slide plate (24) is worn, the latter is moved together with the next closure plate (23) up to open and close the closure (20) and, when this plate is worn, the next closure plate (23) is moved, until the base plate (22), the slide plate (24) and the closure plates (23) are all worn. By means of the coupling mechanism (30) arranged in the sliding closure (20), the closure plates (23) are in each case either coupled with or uncoupled from the slide plate (24) or else the base plate (22). Consequently, by means of the invention considerable advantages are achieved in terms of handling and with regard to the operation of the converter compared with the use of a known sliding closure.
A further reference may be made to United States Patent application bearing no. CN202925051U, titled “Fast-positioning converter sliding-plate-method slag stopping and tapping device”. The utility model provides a fast-positioning converter sliding-plate-method slag stopping and tapping device. The fast-positioning converter sliding-plate-method slag stopping and tapping device comprises a connecting plate, a mounting plate and a door frame, which are parallel to one another, wherein the connecting plate is connected with a converter tapping hole, the mounting plate is connected with the surface of the connecting plate, and the door frame is connected with the surface of the mounting plate; when being positioned at a hollow upper limit, a molten steel nozzle is at a complete shielding state, when being positioned at a hollow lower limit, the molten steel nozzle is at a complete connection state, and when being not positioned at the hollow upper limit and the hollow lower limit, the molten steel nozzle is at a state between compete connection and complete shielding; and the fast-positioning converter
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sliding-plate-method slag stopping and tapping device also comprises a driving device which is connected with one end of a sliding plate and supplies power by which the sliding plate slides back and forth along a vertical direction. The fast-positioning converter sliding-plate-method slag stopping and tapping device has the beneficial effects of being safe and reliable to use, simple to operate and convenient to replace, having a good slag blocking effect and meeting a few-slag and slag-free tapping requirement of a converter.
However, none of the inventions in the prior art provide any product or technology which offers the unique and innovative features as provided by the present invention. The present invention overcomes all the disadvantages of the existing technologies and provides a high strength Converter tapping slag stopping mechanism which particularly improves the operating efficiency of the system. The invention is simple in structure, very convenient to use and simple to maintain yet very effective. Therefore, the present invention is innovative and technically advanced over the technologies disclosed in prior art.
OBJECTS OF THE INVENTION
The primary objective of the present invention is to provide an improved High strength Converter tapping slag stopping mechanism which overcomes the drawbacks of the inventions disclosed in the prior art.
Another objective of the present invention is to provide a High strength Converter tapping slag stopping mechanism which improves the operating efficiency of the product.
Another objective of the present invention is to provide a High strength Converter tapping slag stopping mechanism, which improves the lubricating efficiency, prevents the machine from being stuck in operation and improves the safety coefficient.
A further objective of the present invention is to provide a High strength Converter tapping slag stopping mechanism, which effectively improve the working temperature of the spring, prolong the service life of the spring work piece, and ensure the normal work of the spring in the high-temperature environment of the ladle.
Another objective of the present invention is to provide a High strength Converter tapping slag stopping mechanism with convenient and fast on-site installation and improved installation efficiency.
Yet another objective of the present invention is to provide a High strength Converter tapping slag stopping mechanism, where in the transverse and longitudinal depressions of the spring can be controlled and service life can be prolonged.
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SUMMARY OF THE INVENTION
The invention provides an improved high strength converter tapping slag stopping mechanism capable of improving operation efficiency. The high strength converter tapping slag stopping mechanism comprises of slag blocking mechanism, mechanical cooling system, cylinder, hydraulic system and hydraulic cooling system. The slag blocking mechanism further comprises of a fixed mold frame, a sliding mold frame, a switch mold frame, a water inlet installation mold frame, a water inlet fixed mold frame and a slag blocking plate. The mechanical cooling system communicates with the slag blocking mechanism through a pipeline. The output end of the cylinder is coupled to the slag blocking mechanism for driving the slag blocking mechanism, and the cylinder, the hydraulic system, and the hydraulic cooling system are sequentially connected through a pipeline and form a circuit. The invention overcome the disadvantages of the already existing technologies in the field and provides a high strength converter tapping slag stopping mechanism capable of improving the safety factor and the operating efficiency of the system.
BRIEF DESCRIPTION OF DRAWINGS
Figure. 1 is the schematic diagram of the high strength converter steel slag blocking mechanism which can improve the operation efficiency by the embodiment of the invention.
Figure 2 is a schematic diagram of the high strength converter steel slag blocking mechanism in full open state when the embodiment of the invention can improve operational efficiency.
Figure. 3 is a schematic diagram of the high strength converter steel slag blocking mechanism in full close state when the embodiment of the invention can improve operational efficiency.
Figure 4 is a schematic diagram of the high strength converter steel slag blocking mechanism in full open state when the embodiment of the invention can improve operational efficiency.
Figure. 5 Adds an infrared detection device 1 and a hydraulic system 2 to realize automatic gate lowering detection and automatic closing machine slag blocking.
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Reference numerals represent the parts of High Strength Converter tapping slag stopping mechanism
1. Slag blocking mechanism
2. Mechanism cooling system
3. Oil Cylinder
4. Hydraulic cooling system
5. Hydraulic system
6. Sliding mold frame
7. Fixed mold frame
8. Switch mold frame
9. Slag blocking plate
10. water inlet mounting mold frame or drain mounting frame
11. water inlet fixed mold frame or drain fixed mold frame
12. Slide
13. Compression spring
14. Spring guide sleeve
15. Spring plate
16. Vent hole
17. Fastening bolts
18. Face pressure bolts
19. Sink or sewer or drain brick
20. Lower slide plates
21. Upper slide plates.
STATEMENT OF THE INVENTION
Accordingly, the present invention provides a high strength converter tapping slag stopping mechanism comprising of slag blocking mechanism, mechanical cooling system, an oil cylinder, hydraulic system and a hydraulic cooling system, wherein the mechanical cooling system communicates with the slag blocking mechanism through a pipeline, such that the output end of the cylinder is coupled to the slag blocking mechanism for driving the slag blocking mechanism, and the cylinder, the hydraulic system, and the hydraulic cooling system are sequentially connected through a pipeline and form a loop or circuit resulting in the improvement in the lubricating efficiency, safety coefficient and the operation efficiency of the system.
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DETAILED DESCRIPTION OF THE INVENTION
It should be noted that the particular description and embodiments set forth in the specification below are merely exemplary of the wide variety and arrangement of instructions which can be employed with the present invention. The present inventions may be embodied in the other specific forms without departing from the spirit or essentials characteristics thereof. All the features disclosed in this specification may be replaced by similar other or alternative features performing similar same or equivalent purposes. Thus, unless expressly stated otherwise, they all are within the scope of present invention. Various modifications or substitutions are also possible without departing from the scope or spirit of the present invention. Therefore, it is to be understood that this specification has been described by way of most preferred embodiment and for the purpose of illustration and not limitation.
The technical problem to be solved is to put forward a
An improved high strength converter tapping mechanism for improving operating efficiency, comprising a slag blocking mechanism, a mechanical cooling system, a cylinder, a hydraulic system and a hydraulic cooling system, wherein the mechanical cooling system passes the pipeline and the slag blocking mechanism connected, the output end of the cylinder is connected to the slag blocking mechanism for driving the slag blocking mechanism, and the cylinder, the hydraulic system, and the hydraulic cooling system are sequentially connected through a pipeline and form a loop. The sliding mold frame is arranged in the switch mold frame near the side of the fixed mold frame, the switch mold frame is provided with a slide rail which is suitable for reciprocating movement before and after the sliding mold frame, and the sliding rail surface has a lubricating oil groove, and the slide mold frame is connected with the piston rod of the oil cylinder.
The water inlet installation mold frame is penetrated through the switching mold frame and fixedly connected with the sliding mold frame, the water inlet fixed mold frame is fixedly connected with the inner wall of the water inlet mounting mold frame, and the slag plate is fixedly connected with the water inlet installation mold frame from the side of the sliding mold frame.
An upper sliding plate is fixed in the fixed mold frame, a lower sliding plate is fixed in the sliding mold frame, the upper sliding plate and the lower sliding plate are opposite to each other, and the sewer fixed mold frame is also fixed with a waterspout brick.
The water inlet of the slide plate is provided with an annular convex platform, and the launching port of the water mouth brick is provided with an annular groove which is
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matched with the annular convex platform, and the slide plate and the water mouth brick are offset by the annular convex platform and the annular groove;
The two sides of the sliding mold frame along the sliding direction are provided with spring boxes, the spring boxes comprise springs, spring pressing plates, spring guide sleeves and face pressing bolts, the spring guide sleeves are arranged between the spring pressing plates and the switch mold frame, the springs are sleeved on the spring guide sleeves, and the face pressing bolts sequentially penetrate through the spring pressing plates and the switch mold frame and are fixedly connected with the fixed mold frame;
The switch mold frame is provided with at least one vent hole near the spring case;
slag blocking plate, the lower nozzle mounting mold frame and the sliding mold frame are fastened by fastening bolts penetrating through the three in sequence;
The springs in the spring case are compression springs, and the compression springs are at least one and evenly spaced.
As shown in Figures 1 to 4; The slag blocking mechanism (1), the mechanism cooling system (2), the oil cylinder (3), the hydraulic system (5) and the hydraulic cooling system (4). The mechanism cooling system (2) is communicated with the slag blocking mechanism 1 through the pipe, which is used for cooling the slag body (1).
The output end of the oil cylinder (3) is connected with the slag blocking mechanism (1) for driving the slag blocking mechanism (1) to realize opening and closing. The oil cylinder (2), the hydraulic system (5) and the hydraulic cooling system (4) are connected sequentially through the pipeline and form the circuit.
The slag blocking mechanism (1) comprises a fixed mold frame (7), sliding mold frame (6), switch mold frame (8), water inlet installation mold frame (10), water inlet fixed mold frame (11) and slag plate (9).
The fixed mold frame (7) and the switch mold frame (8) are connected by a pin. The sliding mold frame (6) is mounted on the side of the switch mold frame (8) near the fixed mold frame (7).
The switch mold frame (8) is mounted with a slide rail (12) adapted to reciprocate back and forth of the slide mold frame (6). The lubricating rail groove is formed on the surface of the slide rail (12).
The sliding mold frame (6) is connected to the piston rod of the oil cylinder (3), and the water inlet mounting mold frame (10) is inserted through the switch mold frame (8) and fixed to the sliding mold frame (6), and the water inlet fixed mold frame (11) is fixed to the inner wall of the water inlet mounting mold frame (10).
The slag blocking plate (9) is fixed to the side of the drain mounting mold frame (10) away from the sliding mold frame (6). The slag blocking plate (9), the lower nozzle
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mounting mold frame (10), and the sliding mold frame (6) are fastened by the same fastening bolt (17) penetrating through the three in sequences. The fastening bolts (17) are symmetrically arranged.
An upper slide plate (21) is fixed in the fixed mold frame (7), and a lower slide plate (20) is fixed in the slide mold frame (6), and the upper slide plate (21) and the lower slide plate (20) about each other. A drain brick (19) is also fixed in the water inlet fixed mold frame (11).
The inlet of the slide plate (20) is provided with an annular convex platform, and the inlet of the sewer brick (19) is provided with an annular groove which is matched with an annular convex platform, and (20) of the slide plate and the sewer brick (19) are offset by an annular convex platform and a ring groove.
The spring mold box (6) is mounted on both sides of the sliding mold frame (6) in the sliding direction, and the spring box includes a compression spring (13), a spring pressure plate (15), a spring guide sleeve (14) and a surface pressure bolt (18), and the spring guide sleeve (14) is disposed on the spring pressure plate (15) and the switch mold frame (8).
Between the compression springs, (13) is placed on the spring guide sleeve (14), and the surface pressure bolts (18) are sequentially fixed to the fixed mold frame (7) through the spring pressure plate (15) and the switch mold frame (8). The switch mold frame is provided with a vent hole (16) near the spring box.
The compression springs (13) can be increased as needed and evenly spaced. The spring box ensures that the surface pressure between the upper slide plate (21) and the lower slide plate (20) is stabilized, and the steel penetration accident due to the weakening of the surface pressure during the operation of the machine is prevented.
The fixed mold frame (7) is fixed to the base plate of the ladle by the connecting plate. The base plate and the ladle are fixed by bolts and welded, and the whole machine is fixed on the ladle by the fixed mold frame (7).
The sliding frame (6) and the fixed frame (7) can also be provided with arc-shaped sliding plate pressing devices at both ends to prevent the sliding of the sliding plate assembly when the sliding plate is locked, and the angle is abnormal and cannot be installed.
In the running process of slag blocking mechanism (1), the piston rod of the oil cylinder 3 pulls the sliding mold frame (6) to realize the opening and closing of the launching port. In the sliding process, because the switch mold frame 8 is equipped with sliding mold frame (6) movement of the slide (12), slide surface with lubricant groove, sliding mold frame (6) sliding surface using oil groove type horizontal sliding mold, compared with other similar slag blocking mechanism, the safety risk caused by wheel wear and axle breakage of wheel type slag blocking mechanism is eliminated.
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The lubricating oil groove formed on the surface of the slide rail (12) improves the lubrication efficiency, prevents the safety risk caused by the stuck condition of the slag blocking mechanism (1), and greatly improves the safety factor and the operating efficiency of the product.
A processing technology for a high strength converter tapping slag blocking mechanism capable of improving operating efficiency and using a high strength and durable cylindrical spiral compression spring in the high strength converter tapping slag blocking mechanism capable of improving operating efficiency, the high strength and durable.
The processing of the cylindrical spiral compression spring includes the following steps:
(a) Unloading: determining the length by cutting the raw material with acetylene gas, and grinding the cutting surface, the mass percentage of each component in the high strength and durable cylindrical spiral compression spring is: C: 0.58-0.62%, Si: 1.50-1.60%, Mn: 0.40 -0.70%, S: ≤ 0.030%, P: ≤ 0.030%, Cr: 1.11-1.13%, Ni: 0.32-0.35%, Cu: 0.23-0.25%, V: 0.15-0.18%, Mo: 0.01-0.03% , Ti: 0.07-0.09%, B: 0.04-0.06%, the balance is Fe;
(b) Forging tip: The forging tip is used to transfer the two ends of the spring wire from a circular cross-section to a rectangular cross-section. The forging temperature is 1000-1100 ° C, the heating time is 6-8 minutes, and the forging temperature is 950-980. °C;
(c) Hot coil: The spring wire after the forging tip is heated to 800-1000 ° C, and the hot
coil is heated according to the predetermined height, outer diameter and number of turns, and the heat preservation time is 13-15 minutes;
(d) Heat treatment: a heat treatment process using quenching-heating-tempering, the specific heat treatment process is:
Quenching: The hot coiled spring is placed in a vacuum quenching furnace for quenching, the quenching medium is vacuum quenching oil, the quenching temperature is controlled to be 950-970 ° C, and when quenching is cooled to 250-270 ° C, the air is taken out to room temperature;
Heating: After quenching the spring into the heating furnace for heating, heating temperature of 755-770 ℃, 6-8 minutes after heating to stop heating, so that the spring in the furnace in the use of residual heat to maintain 650-670 ℃ insulation for 8-9 minutes, the spring out for cooling, the use of water-cooled and air cold combination, the first water-cooled to 12-15 ℃ /s cooling rate will spring water cooled to 450-470 ℃, and
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then air cold to 370-390 ℃, and then water-cooled to 16-19℃/s cooling rate of the spring water cooled to room temperature;
Tempering: After heating the spring into the vacuum furnace for tempering, control tempering temperature of 450-470 ℃, tempering time 12-15 minutes, and then the use of compressed air or fog quenching liquid to 11-13℃/s cooling rate will be cold to 330-350 ℃, and then air cold to room temperature;
(e) Strong pressure treatment: Press the spring to the required height, park the 6-48h, and release;
(f) Flaw detection processing;
(g) Removing the sharp corners and burrs inside and outside of the spring;
(h) Shot blasting treatment: the spring is subjected to at least 2 shot blasting treatments;
(i) Cleaning, demagnetization and anti-rust treatment.
The invention has following beneficial effects:
a. The switch mold frame is provided with a slide rail for the sliding mold frame movement, the slide rail surface is provided with a lubricant groove, and the sliding surface of the sliding mold frame adopts the oil groove horizontal sliding mold, comparing with other similar slag blocking mechanism, it eliminates the wheel-wheel type of slag blocking mechanism. The safety risk caused by the breakage of the axle, and the safety risk of the card mold in the running of the plane sliding slag machine is eliminated. The lubricating oil groove arranged on the surface of the sliding rail improves the lubricating efficiency, prevents the machine from being stuck in operation, and greatly improves the safety coefficient and the operating efficiency of the product.
b. The lower slide plate and the lower nozzle brick are in contact with each other through the annular boss and the annular groove, and the lower nozzle brick and the lower slide plate are fixedly locked through the lower nozzle fixed mold frame and the lower nozzle installing mold frame, relative sliding is prevented during the working process;
c. At least one air vent is opened at the position of the switch mold frame close to the spring box, the switch mold frame can be used for cooling the spring, the working temperature of the steel ladle is above 1000°C and the temperature at the fixed position of the steel ladle outer wall machine is extremely high. The spring works continuously at high temperature, and the service life of the work piece is obviously reduced. Once the spring fails, there will be looseness between sliding plates, which
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will easily lead to safety accidents. The arrangement of air holes can effectively improve the working temperature of the spring, prolong the service life of the spring work piece, and ensure the normal work of the spring in the high-temperature environment of the ladle.
d. The slag blocking plate, the lower nozzle mounting mold frame and the sliding mold frame are fastened by fastening bolts penetrating through the three in sequence, only the same bolt needs to be screwed during installation or disassembly, so that the installation is convenient and fast on site, and the installation efficiency is improved;
e. Through the processing technology of the high strength durable cylindrical helical compression spring, especially the heat treatment technology thereof, the surface crack caused by the transverse and longitudinal depressions of the spring can be controlled, and the surface layer of the spring wire can generate residual stress opposite to the working stress, so that part of the working stress can be offset when loaded, and the service life can be prolonged.
So accordingly, the present invention provides a high strength converter tapping slag stopping mechanism comprising of slag blocking mechanism, mechanical cooling system, cylinder, hydraulic system and hydraulic cooling system, and the mechanical cooling system communicates with the slag blocking mechanism through a pipeline, such that the output end of the cylinder is coupled to the slag blocking mechanism for driving the slag blocking mechanism, and the cylinder, the hydraulic system, and the hydraulic cooling system are sequentially connected through a pipeline and form a circuit, wherein the slag blocking mechanism comprises a fixed mold frame, a sliding mold frame, a switch mold frame, a water inlet installation mold frame, a water inlet fixed mold frame and a slag blocking plate.
In an embodiment, an improved High strength Converter tapping slag stopping mechanism comprises of a slag blocking mechanism, a mechanism cooling system, a cylinder, a hydraulic system and a hydraulic cooling system.
In other embodiment, mechanism cooling system is connected to the slag blocking mechanism through a pipeline; an output end of the oil cylinder is connected to the slag blocking mechanism for driving the slag blocking mechanism; and the oil cylinder, the hydraulic system and the hydraulic cooling system are sequentially connected through a pipeline to form a loop.
In another embodiment, slag blocking mechanism comprises a fixed mold frame, a sliding mold frame, a switch mold frame, a water inlet installation mold frame, a water inlet fixed mold frame and a slag blocking plate.
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In yet another embodiment fixed mold frame and the switch mold frame are connected by a pin shaft and the sliding mold frame is mounted in the switch mold frame near the side of the fixed mold frame.
In another embodiment, the switch mold frame is provided with a slide rail adapted to reciprocate back and forth of the slide mold frame; the slide rail surface is provided with a lubricating oil groove and the slide mold frame is connected with the piston rod of the oil cylinder.
In another embodiment, water inlet installation mold frame is penetrated through the switching mold frame and fixedly connected with the sliding mold frame; the water inlet fixed mold frame is fixedly connected with the inner wall of the water inlet mounting mold frame, and the slag plate is fixedly connected with the water inlet installation mold frame from the side of the sliding mold frame.
In yet another embodiment, the upper slide plate is fixed in the fixed mold frame, lower slide plate is fixed in the slide mold frame, and the upper slide plate and the lower slide plate are offset and a sewer brick is also fixed in the water inlet fixed mold frame.
In another embodiment, the water inlet of the slide plate is provided with an annular convex platform; the launching port of the water mouth brick is provided with an annular groove which is matched with the annular convex platform, and the slide plate and the water mouth brick are offset by the annular convex platform.
In another embodiment, the sliding mold frame is provided with a spring box along the two sides of the sliding direction, wherein the spring box comprises a compression spring, a spring pressure plate, a spring guide sleeve and a surface pressure bolt such that the spring guide sleeve is arranged between the spring pressure plate and the switch mold frame.
In another embodiment, the compression springs are placed on the spring guide sleeve, and the surface pressure bolts runs through the spring plate and the switch mold frame and is fixedly connected with the fixed mold frame.
In another embodiment, switch mold frame is provided with at least one vent opening near the spring box.
In yet another embodiment the springs in the spring box are high-strength and durable cylindrical helical compression springs and at least one in no. and evenly spaced.
In another embodiment the slag blocking plate, the water inlet mounting mold frame and the sliding mold frame are tightly tightened by three fastening bolts.
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In another embodiment processing technology of high-strength and durable cylindrical helical compression spring comprises cutting, forging tip, heat treatment, pressure treatment, Flaw detection processing; removing the sharp corners and burrs inside and outside the spring, shot blasting treatment, Cleaning, demagnetization and anti-rust treatment.
In yet another embodiment the cutting process includes, determining the length by cutting the raw material with acetylene gas, grinding the cutting surface, the high-strength and durable cylindrical spiral; wherein the mass percentage of each component in the compression spring is: C: 0.58-0.62%, Si: 1.50-1.60%, Mn: 0.40-0.70%, S: ≤ 0.030%, P: ≤ 0.030%, Cr: 1.11-1.13%, Ni: 0.32-0.35%, Cu: 0.23-0.25%, V: 0.15-0.18%, Mo: 0.01-0.03%, Ti: 0.07-0.09%, B: 0.04-0.06%, balance is Fe.
In another embodiment, the Forging the two ends of the spring wire from a circular section to a rectangular section by forging, wherein the forging temperature is 1000-1100 ° C, the heating time is 6-8 minutes, and the forging temperature is 950-980 ° C.
In yet another embodiment spring wire after the forging tip is heated to 800-1000 ° C, and the hot coil is heated according to the predetermined height, outer diameter and number of turns, and the heat preservation time is 13-15 minutes.
In another embodiment, the Heat treatment comprises of;
Quenching, wherein the hot coiled spring is placed in a vacuum quenching furnace for quenching, and the quenching medium is vacuum Quenching oil, control quenching temperature is 950-970 ° C; and when quenching is cooled to 250-270 ° C, the air is taken out to room temperature;
Heating, wherein the quenched spring is placed in a heating furnace for heating, heating temperature is 755-770 ° C, after heating for 6-8 minutes, heating is stopped so that the spring is kept at 650-670 °C for 8-9 minutes in the heating furnace, the spring is taken out for cooling, and the combination of water cooling and air cooling is adopted; firstly using water cooling to a temperature of 450-470 ° C at a cooling rate of 15 ° C / s, then air cooled to 370-390 ° C, and then cooled to room temperature by water cooling at a cooling rate of 16-19 ° C / s;
Tempering, wherein the spring is heated into the vacuum furnace, with the control tempering temperature of 450-470 ℃, tempering time 12-15 minutes, and compressed air or fog quenching liquid to 11-13℃/s cooling rate will be cold to 330-350 ℃, and then air cold to room temperature.
In yet another embodiment the spring is pressed to the required height, park for 6-48 h, and released, followed by the flaw detection processing.
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In another embodiment, the sharp corners and burrs inside and outside the spring is removed and the spring is subjected to at least 2 shot blasting treatments.
In another embodiment, the spring is cleaned, demagnetized, followed by anti-rust treatment.
In yet another embodiment, the surface crack caused by the transverse and longitudinal depressions of the spring can be controlled by heat treatment technology, such that the surface layer of the spring wire can generate residual stress opposite to the working stress, so that part of the working stress can be offset when loaded, and the service life can be prolonged.
In another embodiment, the arrangement of air vents effectively improves the working temperature of the spring, prolong the service life of the spring work piece, and ensure the normal work of the spring in the high-temperature environment of the ladle.
In yet another embodiment, the sliding surface of the sliding mold frame adopts the oil groove horizontal sliding mold which eliminates the wheel-wheel type of slag blocking mechanism and improves the lubricating efficiency, prevents the machine from being stuck in operation, and greatly improves the safety coefficient and the operating efficiency of the product.
ADVANTAGES
1. Improves operating efficiency.
2. Convenient and fast on-site installation.
3. Easy and low-cost maintenance.
4. Safe to use; High safety coefficient
5. Prolonged service life.

WE CLAIM
1. An improved High strength Converter tapping slag stopping mechanism comprising of a slag blocking mechanism (1), a mechanism cooling system (2), an oil cylinder (3), a hydraulic system (5) and a hydraulic cooling system (4), wherein the mechanism cooling system is connected to the slag blocking mechanism (1) through a pipeline; an output end of the oil cylinder (3) is connected to the slag blocking mechanism for driving the slag blocking mechanism ; and the oil cylinder (3), the hydraulic system (5) and the hydraulic cooling system (4) are sequentially connected through a pipeline to form a loop, such that it improves the operating efficiency of the system.
2. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 1, wherein the slag blocking mechanism comprises of a fixed mold frame (7), a sliding mold frame (6), a switch mold frame (8), a water inlet installation mold frame (10), a water inlet fixed mold frame (11) and a slag blocking plate (9), such that the fixed mold frame (7) and the switch mold frame (8) are connected by a pin shaft and the sliding mold frame (6) is mounted in the switch mold frame near the side of the fixed mold frame.
3. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 2, wherein the switch mold frame (8) is provided with a slide rail adapted to reciprocate back and forth of the slide mold frame (6); the slide rail surface is provided with a lubricating oil groove and the slide mold frame (6) is connected with the piston rod of the oil cylinder (3).
4. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 2, wherein the water inlet installation mold frame (10) is penetrated through the switch mold frame (8) and fixedly connected with the sliding mold frame (6); the water inlet fixed mold frame (11) is fixedly connected with the inner wall of the water inlet installation mold frame (10), and the slag plate (9) is fixedly connected with the water inlet installation mold frame (10) from the side of the sliding mold frame (6) .
5. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 2, wherein the slag blocking plate (9), the water inlet mounting mold frame (10) and the sliding mold frame (6) are tightly tightened by three fastening bolts (17).
6. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 2, wherein an upper slide plate (21) is fixed in the fixed mold frame (7); a lower slide plate (20) is fixed in the slide mold frame (6), and the upper slide plate (21) and the lower slide plate (20) are offset and a sewer brick (19) is also fixed in the water inlet fixed mold frame (11).
7. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 5, wherein the water inlet of the slide plate (20) is provided with an annular
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convex platform, and the inlet of the sewer brick is provided with an annular groove which is matched with an annular convex platform, and (20) of the slide plate and the sewer brick (19) are offset by an annular convex platform and a ring groove.
8. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 2, the sliding mold frame (6) is provided with a spring box along the two sides of the sliding direction, wherein the spring box comprises a compression spring (13), a spring pressure plate (15), a spring guide sleeve (14) and a surface pressure bolt (18) such that the spring guide sleeve (14) is arranged between the spring pressure plate (15) and the switch mold frame (8); and wherein the compression springs (13) are placed on the spring guide sleeve (14), and the surface pressure bolts (18) runs through the spring plate (15) and the switch mold frame (8) and is fixedly connected with the fixed mold frame (7).
9. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 8, wherein the springs in the spring box are high-strength and durable cylindrical helical compression springs and at least one in no. and evenly spaced.
10. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 8, wherein the switch mold frame (8) is provided with at least one vent opening (16) near the spring box.
11. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 9, wherein the processing technology of high-strength and durable cylindrical helical compression spring includes cutting, forging tip, heat treatment, pressure treatment, Flaw detection processing, removing the sharp corners and burrs inside and outside the spring, shot blasting treatment, Cleaning, demagnetization and anti-rust treatment.
12. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 11, wherein the cutting process includes, determining the length by cutting the raw material with acetylene gas, grinding the cutting surface, the high-strength and durable cylindrical spiral; wherein the mass percentage of each component in the compression spring is: C: 0.58-0.62%, Si: 1.50-1.60%, Mn: 0.40-0.70%, S: ≤ 0.030%, P: ≤ 0.030%, Cr: 1.11-1.13%, Ni: 0.32-0.35%, Cu: 0.23-0.25%, V: 0.15-0.18%, Mo: 0.01-0.03%, Ti: 0.07-0.09%, B: 0.04-0.06% & balance is Fe.
13. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 11, wherein the two ends of the spring wire are forged from a circular section to a rectangular section, the forging temperature is 1000-1100 ° C, the heating time is 6-8 minutes, and the forging temperature is 950-980 ° C.
14. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 11, wherein the spring wire after the forging tip is heated to 800-1000 ° C, and
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the hot coil is heated according to the predetermined height, outer diameter and number of turns, and the heat preservation time is 13-15 minutes.
15. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 11, wherein the Heat treatment comprises of;
Quenching, wherein the hot coiled spring is placed in a vacuum quenching furnace for quenching, and the quenching medium is vacuum Quenching oil, control quenching temperature is 950-970 ° C; and when quenching is cooled to 250-270 ° C, the air is taken out to room temperature;
Heating, wherein the quenched spring is placed in a heating furnace for heating, heating temperature is 755-770 ° C, after heating for 6-8 minutes, heating is stopped so that the spring is kept at 650-670 °C for 8-9 minutes in the heating furnace, the spring is taken out for cooling, and the combination of water cooling and air cooling is adopted; firstly using water cooling to a temperature of 450-470 ° C at a cooling rate of 15 ° C / s, then air cooled to 370-390 ° C, and then cooled to room temperature by water cooling at a cooling rate of 16-19 ° C / s;
Tempering, wherein the spring is heated into the vacuum furnace, with the control tempering temperature of 450-470 ℃, tempering time 12-15 minutes, and compressed air or fog quenching liquid to 11-13℃/s cooling rate will be cold to 330-350 ℃, and then air cold to room temperature.
16. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 11, wherein the spring is pressed to the required height, park for 6-48 h, and released, followed by the flaw detection processing.
17. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 11, wherein the sharp corners and burrs inside and outside the spring is removed and the spring is subjected to at least 2 shot blasting treatments.
18. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 11, wherein the spring is cleaned, demagnetized, followed by anti-rust treatment.
19. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 11, wherein surface crack caused by the transverse and longitudinal depressions of the spring can be controlled by heat treatment technology, such that the surface layer of the spring wire can generate residual stress opposite to the working stress, so that part of the working stress can be offset when loaded, and the service life can be prolonged.
20. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 11, where in arrangement of air vents effectively improves the working temperature of the spring, prolong the service life of the spring work piece, and
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ensure the normal work of the spring in the high-temperature environment of the ladle.
21. An improved High strength Converter tapping slag stopping mechanism as claimed in claim 1, where in the sliding surface of the sliding mold frame adopts the oil groove horizontal sliding mold which eliminates the wheel-wheel type of slag blocking mechanism and improves the lubricating efficiency, prevents the machine from being stuck in operation, and greatly improves the safety coefficient and the operating efficiency of the product.
22. An improved High strength Converter tapping slag stopping mechanism as claimed in above claims is capable of improving the operating efficiency, lubricating efficiency and safety coefficient of the system substantially as herein before described with reference to the accompanying specification, drawings and any of the preceding claims.