The present invention relates to a ladle slide gate mechanism capable of reducing height, and belongs to the field of metal casting technology.
Background of the Invention:
Ladle slide gate is an important system to control the flow of liquid steel in ladle. If breakout happens during operation of the system, it will lead to the vicious production accidents such as the breaking of the casting machine, and the burning out of the continuous casting machine equipment, which restricts the stability of the production and severely threatens the safety of the person and equipment. As the pace of steelmaking is further accelerated, higher requirements are put forward on speeding up the turnover of ladles and reducing production accidents while the precondition is to ensure the safe operation of the slide gate. Generally, breakout is more likely to happen on the slide gate of small ladle, therefore, it is of great significance for steel works to reduce or eliminate the breakout accident of slide gate.
As the ladle slide gate mechanism works at high temperature, each component is prone to thermal deformation or damage, thus it needs to be replaced frequently. The existing ladle slide gate mechanism is complex in structure, components replacement is time-consuming and laborious, and the shutdown time is long, thereby reducing the production efficiency.
Reference is made to the Patent application no. CN201482936U, by He Candong, dated 06/08/2009, titled "Gravity-cast aluminium alloyed wheel casting die". This invention provides a utility model relates to a gravity-cast aluminium alloyed wheel casting die comprising an upper die, a lower die, a side die, a base and a sprue spreader, wherein the upper die, the lower die and the side die enclose a cavity matched with a wheel hub casting, and both the lower die and the side die are fixed on the base. The casting die also comprises a plurality of water-cooling pipes which are used for water-cooling a plurality of key positions of the die and installed in the die, wherein all inlets and outlets of the water-cooling pipes are installed outside the die. By adopting the structure, the gravity-cast aluminium alloyed wheel casting die has high die material utilization ratio and high production efficiency, and can increase the mechanical property of the wheel and decrease pinholes on the product surface.

Another reference is made to the Patent application number 850/MUM/2010, by Jsw Steel Limited dated 25/03/2010, titled "A Method of Controlled Ramping of Tundish Weight for Reduced Emulsification and A System Thereof". The invention relates to a method for weight-based auto ramping of liquid steel in tundish during ladle change over adapted to reduce emulsification by controlled slow rate of steel filling and a system to implement the method. The method involves low filling rate of steel as a function of the ladle through put and result in ladle filling to desired level in 12-15 minutes time avoiding turbulence in liquid steel and minimizing silica inclusion or slag entrapment, ensuring improved cleanliness and quality of cast steel. The system of the invention is having PLC based control of pneumatically operating/opening slide gate for steel filling in tundish favoring automatic weight-based filling up to a safe level. The auto ramping of tundish is thus capable of wide industrial application in steel industry with less defects and rejections of change over slabs in continuous casting, with improved productivity at less cost in a safe and reliable manner.
Another reference is made to the Patent application no. CN201579391U, by Zhang Jingshuang and Li Debiao dated 11/11/2009, titled "Free roller structure on sector section of continuous casting machine". This invention belongs to the technical field of mechanical engineering, relates to a sector section of a continuous casting machine, in particular to a free roller structure on a sector section of the continuous casting machine. The free roller structure on the sector section of the continuous casting machine mainly comprises a bearing seat end cover, a water-cooling rotary seal ring, a locking nut sleeve, a nut sleeve water sealing ring, an oil seal ring, a bearing, a bearing seat, a roller mandrel and a roller body, and is characterized in that the water-cooling rotary seal ring is arranged in the inner hole of the bearing seat end cover, and the water-cooling rotary seal ring is sealed with the port of the roller mandrel. Cooling water directly enters a roller through an end cover hole on the front side of the bearing seat on one end of a free roller on the sector section and then flows out from the end cover hole of the bearing seat on the other end so as to take away the cast ingot heat on the surface of the roller and achieve the purpose of cooling roller. The free roller structure on the sector section of the continuous casting machine does not need to install any rotary connector, does not leak water, is simple to manufacture and convenient

to install and maintain, and can be widely applied to new continuous casting machines and continuous casting machine transformation projects.
Another reference is made to the Patent application number 201617028237, by Postech Academy Industry Foundation and Chosun Refractories Co. Ltd. dated 06/02/2014, titled "Slide Gate and Valve Plate for Slide Gate". The present invention discloses that a valve plate for a slide gate that is located between a ladle and a turndish to control the flow rate of molten steel. The valve plate for a slide gate has a heptangular shape including: first and second long sides facing and parallel to each other; first and second inclined short sides making contact with the first and second long sides, respectively, at one end thereof; a third short side connecting the first and second short sides; and fourth and fifth inclined short sides making contact with the first and second long sides, respectively, at the other end thereof. The valve plate for a slide gate is symmetrical with respect to the center line thereof that is spaced the same distance apart from the first and second long sides and parallel thereto, and has an orifice formed on the center line.
Another reference is made to the Patent application number 2543/MUMNP/2014, by Baoshan Iron & Steel Co. Ltd. dated 29/06/2012, titled "Control Method and Apparatus for Continuous Casting Steel Pouring". A control method for continuous casting steel pouring. The method comprises: 1. measuring and reading a ladle casting location signal by using a ladle location sensor mounted on a ladle rotary table; 2. determining in a steel pouring optimization control computer whether the steel pouring of the ladle starts; 3. feeding steel slag measurement data back to an inference controller by using a steel slag measurement sensor mounted above a ladle slide gate nozzle; 4. in the inference controller comparing the read steel slag measurement data with a manually set steel slag value; if the steel slag measurement data is smaller than the manually set steel slag value returning to a previous step; and if the steel slag measurement data is greater than the manually set steel slag value outputting and feeding a cylinder control variable to a PI controller; and 5. in the PI controller comparing a fed in cylinder location signal with an actually measured cylinder location signal and performing calculation and outputting to control a cylinder driving unit to push a cylinder to move so as to make the opening degree of the ladle slide gate nozzle smaller. An apparatus for continuous casting steel pouring using the above control method is

further provided. By means of the above method and apparatus the amount of the molten steel flow of the ladle is controlled thereby improving the yield of the molten steel and decreasing the production cost.
Another reference is made to the Patent application number 201814013720, by Hazelett Strip-Casting Corporation dated 11/04/2017, titled "System and Method for Continuous Casting". A continuous casting apparatus includes a first belt carried by a first upstream pulley and a first downstream pulley, a second belt carried by a second upstream pulley and a second downstream pulley, and a mold region defined by a first mold support section arranged behind the first belt and a second mold support section arranged behind the second belt. The first mold support section supports the first belt and defines a shape of the first belt in the mold region and the second mold support section supports the second belt and defines a shape of the second belt in the mold region. At least one of the first mold support section and the second mold support section includes a transition portion and a generally planar portion downstream from the transition portion. The transition portion has a variable radius configured to receive molten metal from a metal feeding device.
Another reference is made to the Patent application number 201737000384, by Foseco International Limited dated 02/09/2014, titled "Feeder System". The present invention relates to a feeder system for metal casting. The feeder system comprises a feeder sleeve mounted on a tubular body. The feeder sleeve has a longitudinal axis and comprises a continuous sidewall that defines a cavity for receiving liquid metal during casting. The sidewall extends generally around the longitudinal axis and has a base adjacent the tubular body. The tubular body defines an open bore therethrough for connecting the cavity to the casting. A groove extends into the sidewall from the base to a first depth and the tubular body projects into the groove to a second depth and is held in position by retaining means. The second depth being less than the first depth so that upon application of a force in use the retaining means are overcome and the tubular body is pushed further into the groove.
Another reference is made to the Patent application number 201617025949, by Vesuvius Group SA dated 19/02/2014, titled "Ladle Shroud for Casting Metal Kit of Parts for Coupling Assembly for Coupling Said Ladle Shroud to A Ladle Metal

Casting Installation and Coupling Process”. The present invention concerns a metal casting installation comprising a ladle comprising an inner nozzle in fluid communication with the through opening of a top gate plate and equipped with a ladle shroud coupling assembly comprising: (a) a support frame comprising a bottom gate plate and a passage said support frame being sliding coupled to a planar bottom surface of the top gate plate such that the opening of the bottom gate plate can be brought in or out of registry with the through opening of the top gate plate (b) a drawer frame inserted in the passage of the support frame such that the drawer frame can be moved back and forth through said passage (c) first and second latches resiliently mounted such that they can move from a coupling position to a loading position (d) a specifically designed ladle shroud comprising a bore and gripping means suitable for being reversibly coupled to the first and second latches wherein the drawer frame by moving through the passage of the support frame can bring the bore of the ladle shroud alternatively in and out of registry with the opening of the bottom gate plate.
Another reference is made to the Patent application number CN108160982A, by Yang Rui, Zhao Rongjie, Wu Jianjun, Liang Quan, Sun Zhiqing and Yu Bin dated 09/02/2018, titled “Steel ladle sliding nozzle device”. The invention discloses a steel ladle sliding nozzle device. Compression spring sets are arranged at the positions, close to the outer edge, of the two sides of a clamping frame. Each of the two sides of the upper surface of the clamping frame is provided with a spring pressing plate. One ends of the compression spring sets make contact with the spring pressing plates, and the other ends of the compression spring sets make contact with the inner end face of spring counter bores of the clamping frame. The clamping frame is further provided with first pressing screws and pressing blocks. One ends of the first pressing screws are connected with the spring pressing plates, and the other ends of the first pressing screws are connected with the pressing blocks. The pressing blocks are connected with the fixing frame through second pressing screws. A full-thread structure tight jacking device is utilized for fixing and locking a lower water nozzle, and more safety and reliability are achieved. By adoption of the above technical scheme, constant and uniform pressure is constructed on an upper-lower sliding plate interface, and heat expansion changes are absorbed by the compression spring sets. A pressure transmission structure is more reasonable, evener and safer. Springs are far away
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from a high-temperature area, and the heat load is reduced to the maximum degree; and a forced air-cooling device is adopted, usage of the mechanism is safer and more reliable, and the service life is long.
Another reference is made to the Patent application no. CN101586912A, by Lu Huanyi, Li Shixuan, Gui Guangchen and Hui Yan dated 18/06/2009, titled “Aluminium and aluminium alloy isothermal smelting furnace”. This invention relates to an aluminium and aluminium alloy isothermal smelting furnace, comprising a furnace body and an inner liner. The inner liner is arranged in the furnace body to form a hearth. The middle position of the hearth is provided with a partition for dividing the hearth into a furnace starting smelting zone and a heating zone. A furnace door and a furnace starting burning system are mounted on the side wall of the furnace starting smelting zone. An immersion heater is mounted on the furnace top of the heating zone and perpendicularly extends into the hearth of the heating zone. A headpiece is arranged on the side wall of the heating zone. A heating piece is installed on the partition. Holes are arranged on the bottom of the partition to communicate the furnace staring smelting zone and the heating zone. A vortex feed well and a recycle pump are distributed outside the furnace body. The vortex feed well and the hearth of the furnace starting smelting zone are communicated. The inlet of the recycle pump and the hearth of the heating zone are communicated. The outlet of the recycle pump is communicated with the vortex feed well. The isothermal smelting furnace can effectively smelt the aluminum and aluminum alloy waste materials, aluminum bits and original aluminum ingots, improves the energy resource utilization ratio, decreases the aluminum liquid oxidation and burning, improves the aluminum liquid quality and optimizes the smelting art.
Another reference is made to the US Patent application no. US20040104521A1, by Nobuyuki Yokoi, Akira Otsuka, Motoki Toyota and Haruyuki Oba dated 01/05/2001, titled “Sliding nozzle unit”. This invention discloses a sliding nozzle unit in which a face pressure load is released by inserting a cotter into a press member provided in an open close metal frame and sliding the cotter on an inclination block provided on the side face of a sliding metal frame thereby flexing a resilient body through the press member. The inclination block is spaced apart from the nozzle hole of a sliding plate on the longitudinal side face of the sliding metal frame. Inclining face of the inclination block is formed to become lower
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toward the direction for fully closing the nozzle hole and a stop member is provided on the longitudinal side face of the sliding metal frame, in the vicinity of nozzle hole of the sliding plate, so that the nozzle hole is not fully opened under a state where the cotter is inserted into the press member. Alternatively, the inclination block may be disposed closely to the nozzle hole in the longitudinal side face of the sliding metal frame, the inclining face of the inclination block is formed to become lower toward the direction for fully opening the nozzle hole and a stop member may be provided to be closer to the full close side than the inclination block, and on the longitudinal side face of the sliding metal frame so that the nozzle hole is not fully opened under a state where the cotter is inserted into the press member.
Another reference is made to the US Patent application no. US6619619B2, by Vincent Boisdequin and Philippe Mutsaarts dated 29/03/2000, titled “Clamping device for a refractory-made plate of a sliding gate”. This invention discloses a clamp for clamping device for a refractory plate in a seating of a slide valve in a casting installation, the said clamp having on one hand a thrust zone whereon it can receive a clamping force tending to push the clamp against a refractory plate located in the seating and, on the other hand, two ends of which each is capable of being applied against one edge of the refractory plate. The clamp is characterised in that it is capable of being elastically deformed in that each of its two ends is conformed such that it bears against the corresponding edge of the refractory plate when a clamping force is applied to the clamp also bears against the wall of the seating under the effect of expansion of the plate or a greater clamping force. One of the advantages of the clamp, and in that the clamp is also deformed such that the clamp according to the invention is that it adapts automatically to the geometry of the plate which it is required to immobilise, so that variations in shape between plates due to their fabrication process do not cause any clamping problems.
Another reference is made to the Patent application no. EP2022581A1, by Junichi Funato, Shunji Sadano and Kenji Tachibana dated 19/05/2006, titled “Upper nozzle-integrated plate and method of separating them”. This invention discloses an upper nozzle/plate integral unit comprising an upper nozzle and an upper plate integrated together, which is capable of being easily split into the upper nozzle and the upper plate after use, while adequately maintaining a thickness of a joint
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between the upper nozzle and the upper plate during use. A metal casing is bent inwardly along an outer peripheral surface of a lower end portion of an alumina carbon-based refractory body of the upper nozzle to form a metal member. The metal member formed by bending the metal casing inwardly has a length of 15 mm. A gap between the metal casing and the refractory body is filled with mortar having a thickness of about 0.5 mm. A recess of the lower end portion of the upper nozzle is fitted onto a raised portion of the upper plate through mortar, and the metal casing of the upper nozzle is in contact with a metal casing of the upper plate. A peripheral edge of the metal casing of the upper plate is fixedly joined to the metal casing of the upper nozzle through a plurality of welded portions.
Another reference is made to the Patent application no. WO2009151250A2, by Hyung Gon Lee and Young Ho Kim dated 12/06/2008, titled “Slide Gate”. The present invention relates to a slide gate which controls a flow rate of molten steel, and more specifically, the present invention relates to a slide gate in which one pair of overlapped opposite upper and lower valve plates vary an area of a molten steel flow opening for controlling a flow rate of the molten steel. The slide gate includes an upper housing having an upper valve plate placed in an inner side, a lower housing under the upper housing having a lower valve plate placed in an inner side, one pair of elastic hinge members passed through a right side and a left side of the upper housing or the lower housing vertically to secure the lower housing or the upper housing to the upper housing or the lower housing opposite thereto such that the lower housing or the upper housing is movable up and down elastically and to secure the lower housing to be enable to be opened or closed, a slider in the lower housing for receiving moving force from a driving cylinder C in a state the slider supports the lower valve plate to slide in front/rear directions, a guide track mounted on an underside of the slider along a moving direction of the slider having recesses on one side, and one pair of rollers mounted on left/right sides of the lower housing to make rolling contact with the guide track.
Another reference is made to the Patent application no. US20140048225A1, by Vincent Boisdequin and Mariano Collura dated 19/03/2010, titled “Casting plate and casting plate casing with detector-engaging protrusion”. The present invention discloses a casting plates constructed for facing the casting orifice of a metallurgical vessel are provided with a metallic casing. The casting plates and metallic casing are provided with a protrusion configured to interact with a
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detector. The casing has a main surface with an opening, and two substantially longitudinal bearing surfaces. The protrusion extends from the casing in a direction substantially parallel to the longitudinal bearing surfaces. The protrusion is formed by a ramp having an inclined portion.
Another reference is made to the Patent application no. CA2903952A1, by Junici Funato, Nobuyuki Yokoi and Toshihiro Imahase dated 27/03/2013, titled “Sliding nozzle device”. The present invention provides a sliding nozzle device which is configured so as to reduce damage such as the roughening of the surface of a used plate and the chipping of the periphery of a nozzle hole. This sliding nozzle device is provided with a stationary metallic frame, a sliding metallic frame, and an opening/closing metallic frame which holds the sliding metallic frame in a slidable manner. The sliding contact surfaces of sliding members which are provided to both the sliding metallic frame and the opening/closing metallic frame are in sliding contact with each other. The sliding contact surfaces of a sliding member of the sliding metallic frame are arranged at the front and rear in the sliding direction at a predetermined distance from each other, and the portion between the front and rear sliding contact surfaces is a recess. The sliding contact surfaces of the sliding member of the opening/closing metallic frame are provided at the front and rear in the sliding direction at a predetermined distance from each other, and the portion between the front and rear sliding contact surfaces is a recess.
However, none of the above discussed inventions provide a ladle slide gate mechanism capable of reducing height. This ladle slide gate mechanism consists of slag stopping plate which is provided with fixing through-holes at corresponding positions, lower nozzle fixed frame and sliding frame. The slag stopping plate is of flat shape, and the lower nozzle fixed frame is hollow. The slag stopping plate, lower nozzle fixed frame and sliding frame are overlapped from top to bottom and they are fixed by passing through the fixing bolt of the through-hole in sequence. The lower nozzle fixed frame is also equipped with lower nozzle installation frame and its inner wall is provided with at least one locking recess. The outer wall of the lower nozzle installation frame is provided with a locking head at the corresponding position of the locking recess.
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The lower nozzle fixed frame and lower nozzle installation frame are connected together through the locking recess and the locking head.
Objects of the invention:
The main objective of the present invention is to provide a ladle slide gate mechanism capable of improving the locking safety of the slide plate through a locking mechanism.
Another objective of the present invention is to control the flow of metal casting.
Another objective of the present invention is to minimize a risk of breakout accident during operation.
Another objective of the present invention is to minimize the risk of steel re-oxidation.
Summary of the invention:
The present invention provides a ladle slide gate mechanism consists of slag stopping plate which is provided with fixing through-holes at corresponding positions, lower nozzle fixed frame and sliding frame. The slag stopping plate, lower nozzle fixed frame and sliding frame are overlapped from top to bottom and they are fixed by passing through the fixing bolt of the mentioned through-hole in sequence. The lower nozzle fixed frame is also equipped with lower nozzle installation frame and its inner wall is provided with at least one locking recess. The outer wall of the lower nozzle installation frame is provided with a locking head at the corresponding position of the locking recess. The lower nozzle fixed frame and lower nozzle installation frame are connected together through the locking recess and the locking head, which makes installation and disassembly convenient and fast.
Statement of the Invention:
Accordingly, the present invention provides a ladle slide gate mechanism capable of reducing height, the characteristic of it is that: it consists of slag stopping plate which is provided with fixing through-holes at corresponding positions, lower nozzle fixed frame and sliding frame. The slag stopping plate is of flat shape, and the lower nozzle fixed frame is hollow. The slag stopping plate, lower nozzle fixed frame and sliding frame are overlapped from top to bottom and they are fixed by
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passing through the fixing bolt of the through-hole in sequence. The lower nozzle fixed frame is also equipped with lower nozzle installation frame and its inner wall is provided with at least one locking recess. The outer wall of the lower nozzle installation frame is provided with a locking head at the corresponding position of the locking recess. The lower nozzle fixed frame and lower nozzle installation frame are connected together through the locking recess and the locking head.
Brief Description of Drawings:
Fig. 1 shows a structure diagram of the ladle slide gate mechanism capable of reducing height.
Fig.2 shows a structure diagram for locking recess section of the ladle slide gate mechanism capable of reducing height.
The referral numerals shown in the figures are as follows: 1-Sliding frame; 2-Lower nozzle fixed frame; 3-Slag stopping plate; 4-Fixing bolt; 5-Lower nozzle installation frame; 6-The first fixing through-hole; 7-The second fixing through-hole; 8-The third fixing through-hole; 9-Nut; 10-Locking recess.
Detailed description of the Invention:
It should be noted that the particular description with features, designs, components, construction, working 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 invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. All the features disclosed in this specification may be replaced by similar other or alternative features performing similar or 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 the most preferred embodiments and for the purposes of illustration and not limitation.
The present invention provides a ladle slide gate mechanism capable of reducing height includes slag stopping plate (3), lower nozzle fixed frame (2) and sliding frame (1). The slag plate (3) is of flat shape and the lower nozzle fixed frame (2)
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is hollow. The slag stopping plate (3), the lower nozzle fixed frame (2) and sliding frame (1) are overlapped from top to bottom. The corresponding positions of the slag plate (3), the lower nozzle fixed frame (2) and the sliding frame (1) are symmetrically provided with two first fixing through-holes (6), two second fixing through-holes (7) and two third fixing through-holes (8). The external side of the upper end of the lower nozzle fixed frame (2) is provided with flange on which the two second through-holes (7) are set up. The fixing bolt (4) passes through the three groups of the fixing through-holes in sequence. The fixing bolt (4) are provided with external threads, and the first fixing through-hole (6), the second fixing through-hole (7) and the third fixing through-hole (8) are provided with internal threads that match with the external threads. This ladle slide gate mechanism also includes nut (9) that matches with the fixing bolt (4). A recess suitable for inserting of the nut (9) is provided at the third fixing through-hole (8) on the bottom surface of the sliding frame (1). The axis of the recess coincides with that of the through-hole and the nut (9) is located inside the recess. The fixing bolt (4) passes through the fixing through-holes of the slag stopping plate (3), the lower nozzle fixed frame (2) and the sliding frame (1) and connects to the nut (9). The slag stopping plate (3), the lower nozzle fixed frame (2) and sliding frame (1) are fixed together through the external and internal threads as well as the fixing bolt (4) and nut (9).
The lower nozzle fixed frame (2) is also equipped with lower nozzle installation frame (5). The inner wall of the lower nozzle fixed frame (2) is provided with three locking recesses (10) in even spacing. Section of the locking recess (10) is of J-type, the outer wall of the lower nozzle installation frame (5) is equipped with three locking heads at the corresponding position of locking recess (10) and the locking heads are stuck in the locking recess (10). The lower nozzle fixed frame (2) and the lower nozzle installation frame (5) are fixed together through the locking recess (10) and locking head.
Because the slag stopping plate (3), the lower nozzle fixed frame (2) and the sliding frame (1) are through fixed from top to bottom by a fixing bolt, the installation is convenient and quick, which greatly saves the time for changing of the slag stopping mechanism; because the lower nozzle fixed frame and the lower nozzle installation frame are fixed by locking recess (10) and locking head, when installing or disassembling, only the lower nozzle installation frame (5) is needed
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to be disassembled, so that the locking head is stuck in or out of the locking recess (10), which is convenient and quick, and further saves the time of changing or installing the slag stopping mechanism.
So, accordingly in the preferred embodiment, the present invention discloses an improved ladle slide gate mechanism with capability of reducing height, said mechanism comprising of slag stopping plate (3) which is provided with fixing through-holes at corresponding positions, lower nozzle fixed frame (2) and sliding frame (1), said lower nozzle fixed frame(2) is equipped with a lower nozzle installation frame(5) and its inner wall is provided with at least one locking recess(10), such that the section of the locking recess(10) is of J-type shape..
In an embodiment, said slag stopping plate is of flat shape.
In another embodiment, said lower nozzle fixed frame is hollow.
In yet another embodiment, said slag stopping plate, lower nozzle fixed frame and sliding frame are fixed together through the external and internal threads.
In another embodiment, said slag stopping plate, the lower nozzle fixed frame and sliding frame are provided with at least two fixing through-holes symmetrically.
In yet another embodiment, said slag stopping plate, lower nozzle fixed frame and sliding frame are overlapped from top to bottom and are fixed by passing through the fixing bolt of the through-hole in sequence.
In another embodiment, said fixing bolt is provided with external threads, and the fixing through-hole is provided with internal threads that match with the external threads.
In yet another embodiment, said lower nozzle fixed frame is equipped with lower nozzle installation frame and its inner wall is provided with at least one locking recess.
In another embodiment, said outer wall of the lower nozzle installation frame is provided with a locking head at the corresponding position of the locking recess.
In another embodiment, said lower nozzle fixed frame and lower nozzle installation frame are connected together through the locking recess and the locking head.
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In yet another embodiment, said external side of the upper end of the lower nozzle fixed frame is provided with flange, and the fixing bolt passes through the flange on which the two second through-holes are set up.
In another embodiment, said fixing bolt are provided with external threads, and the first fixing through-hole, the second fixing through-hole and the third fixing through-hole are provided with internal threads that match with the external threads.
In another embodiment, said nut matches with the fixing bolt, a recess suitable for inserting of the nut is provided at the fixing through-hole on the bottom surface of the sliding frame, the axis of the recess coincides with that of the through-hole, and the nut is located inside the recess, the fixing bolt passes through the fixing through-holes of the slag stopping plate, the lower nozzle fixed frame, and the sliding frame in sequence, and connects with the nut.
Advantages:
1) The slag stopping plate, lower nozzle fixed frame and sliding frame are through fixed from top to bottom by a fixing bolt, so the installation is convenient and quick, which greatly saves the time for changing of the slag stopping mechanism;
2) The lower nozzle fixed frame and lower nozzle installation frame are connected together through the locking recess and locking head, so the installation and disassembly are more convenient;
3) Due to the fixation from same fixing bolt, the fitting of the slag stopping
plate, the lower nozzle fixed frame and the sliding frame become more
accurate, so as to avoid mechanism damage or slag stopping failure caused
by the relative displacement of the three parts at the joint during operation;
4) The connection among the slag stopping plate, the lower nozzle fixed frame and the sliding frame becomes more stable and firmer due to at least two through-holes which are provided symmetrically; and
5) The internal threads are matched with the external threads are provided in the fixing through-hole, and nut is arranged on the bottom surface of the sliding frame, so the structure of converter slag stopping mechanism is more solid and the connection is tighter through the dual connection of the threads and nut with the fixing bolt.

We Claim:

An improved ladle slide gate mechanism with capability of reducing height,
said mechanism comprising of slag stopping plate (3) which is provided with
fixing through-holes at corresponding positions, lower nozzle fixed frame
(2) and sliding frame (1), said lower nozzle fixed frame(2) is equipped with
a lower nozzle installation frame(5) and its inner wall is provided with at
least one locking recess(lO), such that the section of the locking recess(lO)
is of J-type shape.
The ladle slide gate mechanism capable of reducing height as claimed in
claim 1, wherein said slag stopping plate (3) is of flat shape.
The ladle slide gate mechanism capable of reducing height as claimed in
claim 1, wherein said lower nozzle fixed frame (2) is hollow.
The ladle slide gate mechanism capable of reducing height as claimed in
claim 1, wherein slag stopping plate (3), lower nozzle fixed frame (2) and
sliding frame (1) are fixed together through the external and internal
threads.
The ladle slide gate mechanism capable of reducing height as claimed in
claim 1, wherein said slag stopping plate (3), the lower nozzle fixed frame
(2) and sliding frame (1) are provided with at least two fixing through-holes
symmetrically.
The ladle slide gate mechanism capable of reducing height as claimed in
claim 1, wherein said slag stopping plate (3), lower nozzle fixed frame (2)
and sliding frame (1) are overlapped from top to bottom and are fixed by
passing through the fixing bolt (4) of the through-hole in sequence.
The ladle slide gate mechanism capable of reducing height as claimed in
claim 1, wherein said fixing bolt (4) is provided with external threads, and
the fixing through-hole is provided with internal threads that match with
the external threads.
The ladle slide gate mechanism capable of reducing height as claimed in
claim 1, wherein said lower nozzle fixed frame (2) is equipped with lower
nozzle installation frame (5) and its inner wall is provided with at least one
locking recess (10).

The ladle slide gate mechanism capable of reducing height as claimed in claim 1, wherein said outer wall of the lower nozzle installation frame (5) is provided with a locking head at the corresponding position of the locking recess (10).
l.The ladle slide gate mechanism capable of reducing height as claimed in claim 1, wherein said lower nozzle fixed frame (2) and lower nozzle installation frame (5) are connected together through the locking recess (10) and the locking head.
..The ladle slide gate mechanism capable of reducing height as claimed in claim 1, wherein said external side of the upper end of the lower nozzle fixed frame (2) is provided with flange, and the fixing bolt (4) passes through the flange on which the two second through-holes (7) are set up.
l.The ladle slide gate mechanism capable of reducing height as claimed in claim 1, wherein said fixing bolt (4) are provided with external threads, and the first fixing through-hole (6), the second fixing through-hole (7) and the third fixing through-hole (8) are provided with internal threads that match with the external threads.
l.The ladle slide gate mechanism capable of reducing height as claimed in claim 1, wherein said nut (9) matches with the fixing bolt (4), a recess suitable for inserting of the nut (9) is provided at the fixing through-hole on the bottom surface of the sliding frame (1), the axis of the recess coincides with that of the through-hole, and the nut (9) is located inside the recess, the fixing bolt (4) passes through the fixing through-holes of the slag stopping plate (3), the lower nozzle fixed frame (2), and the sliding frame (1) in sequence, and connects with the nut (9).