Claims:We Claim:
1. A hybrid dual line progressive grease lubrication system (400) comprising,
a pumping unit (401) configured to pump grease in a dual line system (a Line A and a Line B) through change over valve (407);
the dual Line system comprising a progressive system (402) in either or both the lines A and Line B;
the pumping unit (401) is further coupled to an End of Line pressure switch (404 & 405) at the end, the End of Line pressure switch (404 & 405) is being configured to change the line A to line B or vice versa once the pressure is build up to threshold.
2. The hybrid dual line progressive grease lubrication system as claimed in claim 1, wherein the progressive system (402) is coupled to a distributor blocks (DB1 & DB2) via 2/2-way solenoid valve (403).
3. The hybrid dual line progressive grease lubrication system as claimed in claim 2, wherein the distributor block is coupled to equipment.
4. The hybrid dual line progressive grease lubrication system as claimed in claim 3, the equipment comprises at least a SCP (Stamping, Charging, Pushing) bearing, at least a gantry travel, at least a frame cleaner, at least a spillage conveyor, at least a door extractor, at least a pushing device, at least a coal cake scrapper, at least a mobile wall, and hammer.
5. The hybrid dual line progressive grease lubrication system as claimed in claim 1, wherein pressure gauge(s) (406 & 407) are coupled after the pumping unit (401) and before the end of line pressure switches (404 & 405) over Line A and Line B respectively.
6. The hybrid dual line progressive grease lubrication system as claimed in claim 1, wherein the pumping unit (401) is coupled to a reservoir (408), the reservoir (408) being configured to store grease.
7. The lubrication system as claimed in claim 1, wherein the lubricant is either one or a combination of lithium grease, lithium complex grease, calcium sulphonate grease, poly urea grease, calcium sulphonate complex grease.
, Description:A HYBRID DUAL LINE PROGRESSIVE GREASE LUBRICATION SYSTEM
FIELD OF INVENTION:
[001] The present invention relates to lubrication system in stamping charging and pushing (SCP) machine. More specifically, the present invention relates to a hybrid dual line progressive grease lubrication system.
BACKGROUND AND PRIOR ART AND PROBLEM IN PRIOR ART:
[002] SCP (stamping, charging, pushing) machine is an integral equipment of coke plant, used to charge coal into ovens for conversion into coke. The machine has centralized grease lubrication system, which operate through pneumatically operated pump and supply lubricant to different consuming points in machine. To avoid lack of lubrication greasing is also applied manually.
[003] A typical lubrication system has a single line progressive and series based DM valves. This system has a drawback that if any of the outlet point is jammed, then lubricant will not flow to the next consuming point. This results in inadequate lubrication. Pneumatic pumps are also not reliable due to erratic air pressure and frequent jamming of outlet points.
[004] In stamping unit, the requirement of grease is very less approx. 0.2 cc/stroke. The application of less amount of lubrication is only possible through progressive lubrication system. Ref. to Fig.1, the progressive lubrication system is disclosed. Progressive lubrication system is suitable for small area of lubrication for better control. Progressive lubrication system comprises a reservoir containing lubrication, a motorize pumping station with relief valve to pump the lubrication from the reservoir to a primary distributor, the lubricant from the primary distributor is then send to secondary distributors from where lubricant is directed to consumption points, in the required quantity. Progressive lubrication systems works with only single inlet line and no change over valves are required. Visual or electric monitoring is done of each metering block. The progressive lubrication system can work in low and medium pressure (50 to 200 bar). As the metering piston is put in series with all the other pistons, any blockage to the lubrication point results in the whole system being stalled.
[005] In rest of the components, the requirement of grease is approx. 2.3 cc/stroke, which is more than what is required in stamping unit. The application of this more amount of lubrication is not possible through progressive lubrication system and is done through dual line lubrication system. Referring to fig. 2, the dual line lubrication system is disclosed. Dual line lubrication system is suitable for large area of lubrication as it dispenses large quantity of grease. In dual line lubrication system double inlet and dual line are required to operate distributor block. The dual line lubrication system work in high pressure (100 to 400 bar) and a changeover valve is required to switch the flow of lubricant from one line to another. Visual or electric monitoring is done of each metering device outlet point.
[006] To cater the need of whole system, two independent lubrication pumps are required which is difficult to install and maintain in SCP machine.
[007] The present subject matter discloses a lubrication system for differential lubrication (according to the requirement at consuming point) in SCP Machines. The lubrication system is consolidation of two lubrication subsystems operated by single pump unit.
OBJECTS OF THE INVENTION:
[008] It is therefore the object of the invention to overcome the aforementioned and other drawbacks in prior system/product/apparatus.
[009] The principal objective of the present invention is to develop a lubrication system for differential lubrication of stamping, charging and pushing unit of the SCP machine according to the requirement of consuming points.
[0010] Another object of the present invention is to develop a lubrication system which can operate with single pumping unit.
[0011] Another object of the present invention is to propose a lubrication system for application of different amount of lubricant at different consumption points, according to the requirement.
[0012] Yet another object of the present invention is to propose a lubrication method for differential lubrication of stamping, charging and pushing unit of the SCP machine according to the requirement of consuming points.
[0013] These and other objects and advantages of the present subject matter will be apparent to a person skilled in the art after consideration of the following detailed description taken into consideration with accompanying drawings in which preferred embodiments of the present subject matter are illustrated.
SUMMARY OF THE INVENTION:
[0014] This summary is provided to introduce concepts related to a hybrid lubrication system and method. The concepts are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
[0015] The present subject matter discloses a lubrication system and method, which is a consolidation of two lubrication subsystems.
[0016] In present subject matter a single line lubrication subsystem (herein denoted as lubrication subsystem 2) is provided for lubrication of stamping unit, as a small quantity of lubricant is required to lubricate the stamping unit. Further, a dual line (Line A and Line B) lubrication subsystem (herein denoted as lubrication subsystem 1) is provided for rest of the components (charging and pushing units), as a relatively more quantity of lubricant is required to lubricate them. Both lubrication subsystems 1 and 2 are operated by single pump unit and collectively provide a lubrication system for differential lubrication of stamping, charging and pushing unit of the SCP machine according to the requirement of consuming points.
[0017] In an aspect, the lubrication subsystem 2 is connected to the line A of the lubrication subsystem 1 via a 2/2 solenoid valve.
[0018] It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined to form a further embodiment of the disclosure.
[0019] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS
[0020] It is to be noted, however, that the appended drawings illustrate only typical embodiments of the present subject matter and are therefore not to be considered for limiting of its scope, for the invention may admit to other equally effective embodiments. The detailed description is described with reference to the accompanying figures. In the figures, a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system or methods or structure in accordance with embodiments of the present subject matter are now described, by way of example, and with reference to the accompanying figures, in which:
[0021] Fig. 1 illustrates single line lubrication system of prior art;
[0022] Fig. 2 illustrates dual line lubrication system of prior art;
[0023] Fig. 3 illustrates lubrication system according to present disclosure.
[0024] The figures depict embodiments of the present subject matter for the purposes of illustration only. A person skilled in the art will easily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DESCRIPTION OF THE PREFERRED EMBODIMENTS:
[0025] While the embodiments of the disclosure are subject to various modifications and alternative forms, specific embodiment thereof have been shown by way of example in the figures and will be described below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.
[0026] The terms “comprises”, “comprising”, or any other variations thereof used in the disclosure, are intended to cover a non-exclusive inclusion, such that a device, system, assembly that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such system, or assembly, or device. In other words, one or more elements in a system or device proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or device.
[0027] The present subject matter relates to a lubrication system for differential lubrication of stamping, charging and pushing (SCP) machine.
[0028] It should be noted that the description and figures merely illustrate the principles of the present subject matter. It should be appreciated by those skilled in the art that conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present subject matter. It should also be appreciated by those skilled in the art that by devising various arrangements that, although not explicitly described or shown herein, embody the principles of the present subject matter. Furthermore, all examples recited herein are principally intended expressly to be for pedagogical purposes to aid the reader in understanding the principles of the present subject matter and the concepts contributed by the inventor(s) to furthering the art and are to be construed as being without limitation to such specifically recited examples and conditions. The novel features which are believed to be characteristic of the present subject matter, both as to its organization and method of operation, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures.
[0029] These and other advantages of the present subject matter would be described in greater detail with reference to the following figures. It should be noted that the description merely illustrates the principles of the present subject matter. It will thus be appreciated that those skilled in the art will be able to devise various arrangements that, although not explicitly described herein, embody the principles of the present subject matter and are included within its scope.
[0030] Embodiment described in present disclosure relates to a hybrid dual line progressive grease lubrication system (400). The hybrid dual line progressive grease lubrication system (400) comprises of a pumping unit (401) which is configured to pump grease in a dual line system (a Line A and a Line B) through change over valve (407). The dual Line system further comprises of a progressive system (402) in either or both the lines A and Line B and the pumping unit (401) is further coupled to an End of Line pressure switch (404 & 405) at the end, the End of Line pressure switch (404 & 405) is being configured to change the line A to line B or vice versa once the pressure is build up to threshold. The lubrication system (400), for charging and pushing units, works in high pressure around 100 to 400 bar and dispenses lubricant in the range of 0.2 cc/point/stroke to 12 cc/point/stroke and for small area such as stamping unit dispenses lubricant in the range of 0.1 cc/point/stroke to 1.5 cc/point/stroke.
[0031] End of line pressure switches (404 and 405) are provided at the end of Line A and Line B respectively. The end of line pressure switches (404 and 405) works as a feedback system and activate a changeover valve (407) to change the flow of lubricant from Line A to Line B of vice versa. Activation of end of line pressure switches (404 and 405) confirms that lubrication of all the consuming points of the present line has completed.
[0032] The progressive system (402) is further coupled to distribution blocks (DB1 & DB2), for Line A and Line B respectively, via 2/2-way solenoid valve (403). Further, the lubrication system (400) according to present disclosure is provided with a reservoir (408) for storing lubricants. These lubricants are pumped from the reservoir (408) to line A & Line B using the pumping unit (401).
[0033] The lubrication system (400) is coupled to line A via 2/2 solenoid valve (403) such that the pumping unit (401) dispenses the lubricant in line A and the lubricant simultaneously enters the lubrication system (400) through 2/2 solenoid valve (403). Lubricant entering in lubrication system (400) through 2/2 solenoid valve (403) is sent to distributors for further distribution of lubricant to the consuming points to lubricate all the consuming points in stamping unit. Lubricant entering in line A will lubricate the consuming points of other components of charging and pushing unit where lubricant is required in large quantities. Lubrication in Line A will continue till all the consuming points in Line A are lubricated and lubricant reaches to the end of line pressure switch (404) and develop pressure till end of line pressure switch (404) activates. The actuated end of line pressure switch (404) in turn actuate solenoid operated change over valve (407), which changes the flow of lubrication from Line A to Line B. After actuation of end of line pressure switch (404), Line A is connected to reservoir line where all the pressurized lubricant returns to reservoir and Line A will be depressurized.
[0034] Activation of end of line pressure switch (404) in turn activates the changeover valve (407), which changes the supply of lubricant from Line A to Line B. Lubrication in Line B will continue till all the consuming points in Line B are lubricated and lubricant reaches to the end of line pressure switch (405) and develops pressure till end of line pressure switch (405) activates.
[0035] After actuation of end of line pressure switch (405) of Line B, the Line B is connected to reservoir line where all the pressurized lubricant returns to reservoir and Line B will be depressurized. With depressurization of Line B, one cycle of current lubrication system (400) completes.
[0036] According to an aspect, the lubricant is either one or a combination of lithium grease, lithium complex grease, calcium sulphonate grease, poly urea grease, calcium sulphonate complex grease.
[0037] The current lubrication system eliminates the need for manual greasing and eliminate safety hazards involved in manual greasing.
[0038] The advantage of current system is that even if lubrication subsystem 2 fails, lubrication subsystem 1 can work normally. So, overall working of lubrication system does not hamper even if lubrication subsystem 2 fails.
[0039] It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B.”
[0040] It will be further appreciated that functions or structures of a plurality of components or steps may be combined into a single component or step, or the functions or structures of one-step or component may be split among plural steps or components. The present invention contemplates all of these combinations. Unless stated otherwise, dimensions and geometries of the various structures depicted herein are not intended to be restrictive of the invention, and other dimensions or geometries are possible. In addition, while a feature of the present invention may have been described in the context of only one of the illustrated embodiments, such feature may be combined with one or more other features of other embodiments, for any given application. It will also be appreciated from the above that the fabrication of the unique structures herein and the operation thereof also constitute methods in accordance with the present invention. The present invention also encompasses intermediate and end products resulting from the practice of the methods herein. The use of “comprising” or “including” also contemplates embodiments that “consist essentially of” or “consist of” the recited feature.
[0041] Although embodiments for the present subject matter have been described in language specific to structural features, it is to be understood that the present subject matter is not necessarily limited to the specific features described. Rather, the specific features and methods are disclosed as embodiments for the present subject matter. Numerous modifications and adaptations of the system/component of the present invention will be apparent to those skilled in the art, and thus it is intended by the appended claims to cover all such modifications and adaptations which fall within the scope of the present subject matter.