Petroleum industry gate valve with automatic abrasion compensation structure

Abstract

The utility model discloses a petroleum industry gate valve with an automatic abrasion compensation structure, which relates to the field of petroleum industry gate valves and is characterized by comprising a valve body, flange plates are mounted at two ends of the valve body, rubber gaskets are mounted on the surfaces of the flange plates in an embedded manner, bolt components are mounted on the flange plates, and the bolt components are connected with the valve body. The bolt assembly comprises a circular side plate, a plurality of springs are distributed on the surface of the circular side plate in a circumferential array mode, the heads of the springs are fixedly connected with a movable plate, a screw A is fixedly connected to the center of the surface of the circular side plate, and a through hole allowing the screw A to penetrate through is formed in the movable plate. The utility model has the effects that the reduced thickness of the rubber gasket due to abrasion can be automatically compensated, the pressing force on the rubber gasket is continuously maintained, and the tight fit between the rubber gasket and the flange plate and between the rubber gasket and another corresponding flange plate is maintained, so that the problems of sealing performance reduction and oil leakage caused by abrasion of the rubber gasket are effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the petroleum industry gate valve field, more specifically, it relates to a petroleum industry gate valve with automatic compensation structure of abrasion. BACKGROUND

[0002] The petroleum industry gate valve is a crucial cut-off valve in the links of petroleum production, transportation and processing. The valve body is usually made of high-strength metal materials such as cast steel and forged steel to withstand the high pressure, high temperature and corrosive working environment of petroleum medium. The gate valve has various gate plate structure designs, such as parallel type and wedge type, which can tightly fit the valve seat to achieve reliable sealing and effectively cut off or conduct petroleum fluid, ensuring no leakage under different working conditions and stable operation of the petroleum industry system.

[0003] In the petroleum industry, the sealing gasket on the flanges on both sides of the gate valve is crucial, and its wear causes the sealing performance to decrease and leakage to occur. The petroleum medium is complex and has special properties, and often contains impurity particles. When flowing at high speed in the pipeline, these particles will continuously scratch the surface of the sealing gasket. Long-term erosion and wear will thin the sealing gasket and gradually damage its original tight sealing structure, greatly reducing the sealing performance and eventually causing petroleum leakage.

[0004] Therefore, in order to solve the above technical problems, the petroleum industry gate valve with automatic compensation structure of abrasion is provided. SUMMARY

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a petroleum industry gate valve with automatic compensation structure of abrasion.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a petroleum industry gate valve with automatic compensation structure of abrasion, comprising a valve body, flange plates are installed at both ends of the valve body, rubber gaskets are embedded on the surface of the flange plates, and bolt assemblies are installed on the flange plates.

[0007] The bolt assembly comprises a circular edge plate, a plurality of springs are arranged in a circular array on the surface of the circular edge plate, the head of each spring is fixedly connected with a movable plate, a screw rod A is fixedly connected with the center part of the surface of the circular edge plate, a through hole is formed in the movable plate for the screw rod A to pass through, and a nut is threadedly connected with the outer side wall of the screw rod A.

[0008] Preferably, a support ring is fixedly connected with the surface of the circular edge plate, and the screw rod A is sleeved in the support ring.

[0009] Preferably, the rubber gasket is internally provided with a liquid injection cavity, a liquid injection port is formed in the outer side wall of the valve body, and the liquid injection port and the liquid injection cavity are connected in communication through a pipeline.

[0010] Preferably, the rubber gasket is internally provided with a liquid injection cavity, and a liquid injection opening is formed on the outer wall of the valve body, and the liquid injection opening and the liquid injection cavity are connected through a pipeline.

[0011] Preferably, the top end of the valve rod is detachably connected with a handle, and the handle can be replaced when it is damaged.

[0012] Preferably, the top end of the valve rod is fixedly connected with a support plate, and the top end of the support plate is fixedly connected with a limiting block, and the inside of the valve rod is provided with a through slot for the limiting block to pass through, and the top end of the limiting block is fixedly connected with a screw rod B, and the outer wall of the screw rod B is threadedly connected with a sleeve.

[0013] Preferably, the opening part of the funnel is threadedly connected with a cover body, and the top end of the funnel is opened and closed through the cover body.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1、When the impurity particles in the petroleum medium wash and wear the rubber gasket and cause the thickness of the rubber gasket to decrease, the spring will lose part of the constraint due to the change of the thickness of the rubber gasket, and then elongate by relying on the elasticity of itself, push the movable plate to continue to move to the rubber gasket, the screw rod A relatively slides in the through hole of the movable plate, the distance between the nut and the circular edge plate is increased, the thickness of the rubber gasket due to wear is automatically compensated, the compression force of the rubber gasket is continuously maintained, the close adhesion between the rubber gasket and the flange plate and another corresponding flange plate (the flange plate on the pipeline) is maintained, thereby effectively preventing the sealing performance from being reduced and the petroleum from leaking due to the wear of the rubber gasket, and the problem that the sealing performance is greatly reduced due to the wear of the sealing gasket in the background art is solved.

[0016] 2、The utility model discloses a specific liquid, such as lubricating liquid or liquid with corrosion prevention function, is injected into the liquid injection cavity of the rubber gasket through the liquid injection opening, and the injected liquid can play a certain buffering effect, when the high-pressure medium impacts the gate valve, the influence of the impact force on the rubber gasket can be alleviated, the fatigue and deformation of the rubber gasket due to frequent impact are reduced, the elastic recovery ability of the rubber gasket is better maintained, and good sealing performance is maintained.

[0017] 3、The utility model discloses that the funnel can conveniently inject liquid into the liquid injection cavity, and the funnel is closed through the cover body when not injecting liquid. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and together with the description serve to explain the present application. In the drawings:

[0019] Figure 1 It is the whole structure schematic view of the present application;

[0020] Figure 2 It is the A partial structure enlarged view of the present application Figure 1

[0021] Figure 3 It is the side specific structure schematic view of the present application;

[0022] Figure 4 It is the specific structure schematic view of the present application when installing handle;

[0023] Figure 5 It is the specific structure schematic view of the handle in the present application;

[0024] Figure 6 It is the specific structure schematic view of the bolt assembly in the present application.

[0025] In the figure: 1, valve body;2, flange plate;3, rubber gasket;4, bolt assembly;401, round edge plate;402, spring;403, movable plate;404, screw A;405, through hole;406, nut;407, support ring;5, liquid injection pipe;6, hopper;7, cover;8, valve stem;9, handle;10, support plate;11, limit block;12, through slot;13, screw B;14, sleeve. DETAILED DESCRIPTION

[0026] As Figures 1-6 shown, the present application provides a kind of petroleum industry gate valve with wear automatic compensation structure, including valve body 1, the both ends of valve body 1 are equipped with flange plate 2, and flange plate 2 is embedded with rubber gasket 3 on surface, and flange plate 2 is equipped with bolt assembly 4;

[0027] Bolt assembly 4 includes round edge plate 401, and multiple springs 402 are arranged in circumferential array on the surface of round edge plate 401, the head of spring 402 is fixedly connected with movable plate 403, and the surface center part of round edge plate 401 is fixedly connected with screw A 404, and through hole 405 for screw A 404 is provided on movable plate 403, and nut 406 is threadedly connected on the outer side wall of screw A 404.

[0028] ​In the initial installation stage, the screw rod A404 is passed through the flange plate 2 on the valve body 1 and the flange plate on the pipeline (through the installation holes on both), then the nut 406 is installed on the screw rod A404, the nut 406 is tightened, the movable plate 403 is pressed against the spring 402 between the movable plate 403 and the circular edge plate 401 under the force of the nut 406, the spring 402 rebounds against the movable plate 403 to exert a certain pre-tightening force on the rubber gasket 3, so that the rubber gasket 3 is tightly attached between the flange plates (between the flange plate on the valve body 1 and the flange plate on the pipeline), thereby ensuring the initial sealing effect. As the oil conveying process begins, when the impurity particles in the oil medium wash and wear the rubber gasket 3, causing the thickness of the rubber gasket 3 to decrease, the spring 402 loses part of the constraint due to the change in the thickness of the rubber gasket 3, and then elongates by virtue of its elasticity, pushing the movable plate 403 to continue moving towards the rubber gasket 3, the screw rod A404 relatively slides in the through hole 405 of the movable plate 403, so that the distance between the nut 406 and the circular edge plate 401 increases, thereby automatically compensating for the decrease in the thickness of the rubber gasket 3 due to wear, continuously maintaining the pressing force on the rubber gasket 3, and maintaining the tight attachment between the rubber gasket 3 and the flange plate 2 and the other corresponding flange plate 2 (the flange plate on the pipeline), thereby effectively preventing the sealing performance from being reduced and the oil from leaking due to the wear of the rubber gasket 3.

[0029] Further, the surface of the circular edge plate 401 is fixedly connected with a support ring 407 in which the screw rod A404 is sleeved, the support ring 407 abuts against the movable plate 403, avoiding the movable plate 403 from excessively pressing the spring 402, causing damage to the spring 402, the rubber gasket 3 is internally provided with a liquid injection cavity, and a liquid injection port is formed in the outer side wall of the valve body 1, the liquid injection port and the liquid injection cavity are connected in communication through a pipeline, a specific liquid, such as lubricating liquid or liquid with corrosion prevention function, is injected into the liquid injection cavity of the rubber gasket 3 through the liquid injection port, the injected liquid can play a certain buffering role, when the high-pressure medium impacts the gate valve, the impact force on the rubber gasket 3 can be alleviated, the fatigue and deformation of the rubber gasket 3 caused by frequent impact can be reduced, the elastic recovery ability of the rubber gasket 3 can be better maintained, and good sealing performance can be maintained.

[0030] Further, the surface of the circular edge plate 401 is fixedly connected with a support ring 407 in which the screw rod A404 is sleeved, the support ring 407 abuts against the movable plate 403, avoiding the movable plate 403 from excessively pressing the spring 402, causing damage to the spring 402, the rubber gasket 3 is internally provided with a liquid injection cavity, and a liquid injection port is formed in the outer side wall of the valve body 1, the liquid injection port and the liquid injection cavity are connected in communication through a pipeline, a specific liquid, such as lubricating liquid or liquid with corrosion prevention function, is injected into the liquid injection cavity of the rubber gasket 3 through the liquid injection port, the injected liquid can play a certain buffering role, when the high-pressure medium impacts the gate valve, the impact force on the rubber gasket 3 can be alleviated, the fatigue and deformation of the rubber gasket 3 caused by frequent impact can be reduced, the elastic recovery ability of the rubber gasket 3 can be better maintained, and good sealing performance can be maintained.

[0031] At present, the handle 9 on the gate valve in the petroleum industry is prone to damage during long-time use, therefore, the handle 9 at the top end of the valve rod 8 on the valve body 1 is designed to be detachable.

[0032] The detachable specific structure is as follows: the top end of the valve rod 8 is fixedly connected with the support plate 10, the top end of the support plate 10 is fixedly connected with the limiting block 11, the inside of the valve rod 8 is provided with the through slot 12 for the limiting block 11 to pass through, the top end of the limiting block 11 is fixedly connected with the screw rod B 13, and the outer side wall of the screw rod B 13 is threadedly connected with the sleeve 14.

[0033] The through slot 12 on the handle 9 is inserted into the limiting block 11 on the valve rod 8 for limiting, at the moment, the bottom of the handle 9 is tightly attached to the support plate 10, then the sleeve 14 is installed on the screw rod B 13, the sleeve 14 moves downwards along the screw rod B 13 and slowly abuts against the top end of the handle 9, so the installation of the handle 9 is completed, inversely, the sleeve 14 is dismounted, the through slot 12 on the handle 9 is pulled out of the limiting block 11, so the dismounting of the handle 9 is completed, and the mounting and dismounting is relatively convenient.

[0034] The above is only a preferred embodiment of the present application, and does not limit the present application in any form; any ordinary technical personnel in the industry can smoothly implement the present application according to the above description and the drawings; however, any equivalent changes, modifications and evolutions made by the technical personnel familiar with the professional within the scope of the technical scheme of the present application, using the above disclosed technical content, are equivalent embodiments of the present application; meanwhile, any equivalent changes, modifications and evolutions made according to the essential technology of the present application to the above embodiments are still within the protection scope of the technical scheme of the present application.

Claims

1. A gate valve for the petroleum industry with an automatic wear compensation structure, comprising a valve body (1), wherein flanges (2) are mounted at both ends of the valve body (1), and rubber gaskets (3) are embedded in the surface of the flanges (2), characterized in that: A bolt assembly (4) is installed on the flange (2); The bolt assembly (4) includes a circular side plate (401), on the surface of which multiple springs (402) are arranged in a circumferential array. The head of each spring (402) is fixedly connected to a movable plate (403). A screw A (404) is fixedly connected to the center of the surface of the circular side plate (401). A through hole (405) is provided on the movable plate (403) for the screw A (404) to pass through. A nut (406) is threaded onto the outer side wall of the screw A (404).

2. A gate valve for the petroleum industry with an automatic wear compensation structure according to claim 1, characterized in that: The circular side plate (401) has a support ring (407) fixedly connected to the surface therein, in which the screw A (404) is fitted.

3. A gate valve for the petroleum industry with an automatic wear compensation structure according to claim 1, characterized in that: The rubber gasket (3) has an injection cavity inside and an injection port is provided on the outer wall of the valve body (1). The injection port and the injection cavity are connected by a pipe.

4. A gate valve for the petroleum industry with an automatic wear compensation structure according to claim 3, characterized in that: The top of the injection port is equipped with an injection tube (5), and the head of the injection tube (5) is connected to a funnel (6).

5. A gate valve for the petroleum industry with an automatic wear compensation structure according to claim 1, characterized in that: The valve body (1) is equipped with a valve stem (8) at its top end, and a handle (9) is detachably connected to the top end of the valve stem (8).

6. A gate valve for the petroleum industry with an automatic wear compensation structure according to claim 5, characterized in that: The valve stem (8) is fixedly connected to a support plate (10), and the support plate (10) is fixedly connected to a limit block (11). The valve stem (8) has a through groove (12) for the limit block (11) to pass through. The limit block (11) is fixedly connected to a screw B (13), and a sleeve (14) is threaded onto the outer wall of the screw B (13).

7. A gate valve for the petroleum industry with an automatic wear compensation structure according to claim 4, characterized in that: The funnel (6) has a cover (7) threadedly connected to its opening.

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