Low-temperature-resistant elastic energy storage sealing valve

Abstract

The utility model discloses a low-temperature-resistant elastic energy storage sealing valve, relates to the technical field of valves, and aims to solve the technical problems that when a low-temperature medium is conveyed by a current elastic sealing valve, an elastic sealing ring in the current elastic sealing valve is easy to shrink when being cooled, and the elastic sealing ring and a valve body are excessively extruded after the temperature rises, so that the valve body is more difficult to open and close. Comprising a valve body and a valve seat detachably installed at the top of the valve body, a push-pull mechanism is detachably installed at the top of the valve body, a pull plate is detachably installed at the execution end of the push-pull mechanism, a through groove is formed in the center of the top end of the valve seat, and a plugging assembly used for plugging the valve body is fixedly installed at the end, penetrating through the through groove, of the pull plate; the sealing assembly comprises a center supporting plate and valve plates distributed at the bottoms of the two sides of the center supporting plate, low-temperature media are cut off through double-side sealing compensation, and therefore the problem that opening and closing are difficult due to extrusion is solved while the sealing performance is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and more specifically, to a cryogenic-resistant elastic energy storage sealing valve. Background Art

[0002] An elastic gate valve is a pipeline device used for intercepting and regulating the flow rate of a medium. It usually consists of a valve body, an elastic gate plate, a sealing seat ring, an elastic sealing ring, a support rod, an operating mechanism, etc. Compared with traditional gate valves, the elastic gate valve is equipped with an elastic sealing ring, which can provide better sealing during use. It adopts a flat-bottom valve seat design: after traditional gate valves are flushed with water, foreign objects are likely to accumulate in the bottom groove of the valve, resulting in the inability to close tightly and causing water leakage. The bottom of the valve seat of the elastic gate valve adopts the same flat-bottom design as the water pipe, which is not easy to cause debris accumulation and enables the fluid to flow smoothly;

[0003] However, in the existing elastic sealing valves, since the sealing effect is improved through the elastic sealing ring, when transporting low-temperature media, it is easy to cause the cold shrinkage of the elastic sealing ring. After the temperature of the intercepted low-temperature medium rises, the elastic sealing ring expands due to the temperature rise and has an excessive extrusion problem with the valve body, resulting in difficulty in lifting the elastic gate plate arranged with the elastic sealing ring when the valve is opened again, making the opening and closing of the valve body 1 relatively laborious. In view of this, we propose a cryogenic-resistant elastic energy storage sealing valve. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art, meet the actual needs, and provide a cryogenic-resistant elastic energy storage sealing valve to solve the technical problem that in the current elastic sealing valve when transporting low-temperature media, its internal elastic sealing ring is prone to cold shrinkage, and after expanding due to temperature rise, there will be an excessive extrusion problem with the valve body, resulting in relatively laborious opening and closing of the valve body.

[0005] To solve the above technical problems, the utility model provides the following technical solution: a cryogenic-resistant elastic energy storage sealing valve, comprising a valve body and a valve seat detachably installed on the top of the valve body;

[0006] A push-pull mechanism is detachably installed on the top of the valve body, and an execution end of the push-pull mechanism is detachably installed with a pull plate. A through groove is centrally opened at the top end of the valve seat, and a plugging component for plugging the valve body is fixedly installed at one end of the pull plate passing through the through groove;

[0007] The plugging component includes a central support plate and valve plates distributed at the bottoms on both sides of the central support plate. The top end of the central support plate is fixedly connected with the pull plate, and a through groove is centrally opened at the bottom end center of one side of the central support plate, and a spring is arranged at the center of the through groove;

[0008] A positioning cavity is formed at the center of the side of the valve plate facing the central support plate, and one end of the spring is fixedly installed at the center of the inner side of the positioning cavity. An annular groove is formed on the outer edge surface of the valve plate on the side away from the central support plate, and an elastic sealing ring is arranged in the annular groove. The valve plate provided with the elastic sealing ring abuts against the inner side of the valve body.

[0009] Through the arrangement of the push-pull mechanism and the plugging component, the present utility model drives the central support plate arranged at the bottom end of the pull plate to move through the push-pull mechanism, so that the two valve plates provided with elastic sealing rings move into the valve body, thereby enabling the two valve plates provided with elastic sealing rings to complete the plugging of both sides in the valve body, realizing the truncation of low-temperature media. When the elastic sealing ring shrinks under the influence of low-temperature media, a pushing force acting on the valve plate is generated by the spring to ensure the pressure of the valve plate provided with the elastic sealing ring acting on the valve body. When the temperature of the low-temperature medium rises, when the elastic sealing ring expands and abuts against the inner wall of the valve body, the pressure generated by the spring on the elastic sealing ring is absorbed, thereby avoiding the problem of difficult opening and closing caused by extrusion while ensuring the sealing performance.

[0010] Preferably, the push-pull mechanism includes a U-shaped support seat detachably installed at the top end of the valve body, and a threaded hole is formed at the center of the top end of the U-shaped support seat, and a threaded valve rod is threadedly installed in the threaded hole.

[0011] Preferably, a handwheel is fixedly installed at the top end of the threaded valve rod, and a fixed seat is rotatably connected to the bottom end of the handwheel, and the fixed seat is detachably connected to the pull plate.

[0012] Preferably, positioning rings are respectively formed at the bottom ends on both sides of the central support plate, and the positioning rings are in plug-in fit with the positioning cavity.

[0013] Preferably, two guide rods are symmetrically formed on the side of the valve plate facing the central support plate, and guide holes for the guide rods to slide are respectively formed at the bottom ends on both sides of the central support plate.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] 1. Through the arrangement of the push-pull mechanism and the plugging component, the present utility model drives the central support plate arranged at the bottom of the pull plate to move through the push-pull mechanism, so that the two valve plates provided with elastic sealing rings move into the valve body, thereby enabling the two valve plates provided with elastic sealing rings to complete the plugging of both sides inside the valve body, realizing the truncation of low-temperature media. When the elastic sealing ring shrinks under the influence of low-temperature media, a pushing force acting on the valve plate is generated by the spring to ensure the pressure of the valve plate provided with the elastic sealing ring acting on the valve body. When the temperature of the low-temperature media rises, when the elastic sealing ring expands and abuts against the inner wall of the valve body, the pressure generated by the spring on the elastic sealing ring is absorbed, thereby avoiding the problem of difficult opening and closing caused by extrusion while ensuring the sealing performance.

[0016] 2. The present utility model also arranges positioning rings. When the two elastic sealing rings expand and push the valve plate to move, the two positioning rings are inserted into the corresponding positioning cavities on the valve plate, and cooperate with the two guide rods slidably arranged in the corresponding guide cavities to realize the positioning of the positioning cavities, so as to avoid the problem of valve plate offset caused by extrusion and further ensure the sealing effect of the valve. Brief Description of the Drawings

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a schematic diagram of the internal structure of the present utility model in a sectional view state;

[0019] Figure 3 is a disassembled schematic diagram of the plugging component in the present utility model.

[0020] Explanation of the reference numerals in the drawings:

[0021] 1. Valve body; 2. Valve seat; 3. Pull plate; 4. Plugging component; 401. Central support plate; 402. Valve plate; 403. Through groove; 404. Spring; 405. Positioning cavity; 406. Elastic sealing ring; 407. Positioning ring; 408. Guide rod; 409. Guide cavity; 5. U-shaped support seat; 6. Threaded valve stem; 7. Handwheel; 8. Fixed seat. Detailed Embodiment

[0022] As Figures 1 to 3 shown, a low-temperature resistant elastic energy storage sealing valve involved in the present utility model includes a valve body 1 and a valve seat 2 detachably installed on the top of the valve body 1;

[0023] In an embodiment of the present utility model, in order to avoid the problem of difficult opening and closing caused by extrusion while ensuring the sealing performance, a push-pull mechanism is detachably installed at the top of the valve body 1, and a pull plate 3 is detachably installed at the execution end of the push-pull mechanism. A through groove is centrally formed at the top end of the valve seat 2, and a plugging assembly 4 for plugging the valve body 1 is fixedly installed at one end of the pull plate 3 passing through the through groove. The plugging assembly 4 includes a central support plate 401 and valve plates 402 distributed at the bottoms on both sides of the central support plate 401. The top end of the central support plate 401 is fixedly connected to the pull plate 3, and a through groove (403) is formed at the center of the bottom end on one side of the central support plate 401. A spring 404 is arranged at the center of the through groove (403). A positioning cavity 405 is formed at the center of the side of the valve plate 402 facing the central support plate 401, and one end of the spring 404 is fixedly installed at the center of the inner side of the positioning cavity 405. An annular groove is formed on the outer edge surface of the valve plate 402 away from the central support plate 401, and an elastic sealing ring 406 is arranged in the annular groove. The valve plate 402 provided with the elastic sealing ring 406 abuts against one side inside the valve body 1. Through the arrangement of the push-pull mechanism and the plugging assembly 4, the central support plate 401 arranged at the bottom end of the pull plate 3 is driven to move by the push-pull mechanism, so that the two valve plates 402 provided with the elastic sealing rings 406 move into the valve body 1, and the two valve plates 402 provided with the elastic sealing rings 406 complete the plugging of both sides inside the valve body 1, realizing the truncation of the low-temperature medium. When the elastic sealing ring 406 shrinks under the influence of the low-temperature medium, the spring 404 generates a pushing force acting on the valve plate 402 to ensure the pressure of the valve plate 402 provided with the elastic sealing ring 406 acting on the valve body 1. When the temperature of the low-temperature medium rises, when the elastic sealing ring 406 expands and abuts against the inner wall of the valve body 1, the spring 404 absorbs the pressure generated by the elastic sealing ring 406, thus avoiding the problem of difficult opening and closing caused by extrusion while ensuring the sealing performance.

[0024] In an embodiment of the present utility model, in order to realize the sealing of the valve body 1, the push-pull mechanism includes a U-shaped support seat 5. The U-shaped support seat 5 is detachably installed at the top end of the valve body 1, and a threaded hole is formed at the center of the top end of the U-shaped support seat 5. A threaded valve rod 6 is installed in the threaded hole in a threaded fit manner. A handwheel 7 is fixedly installed at the top end of the threaded valve rod 6, and a fixed seat 8 is rotatably connected to the bottom end of the handwheel 7. The fixed seat 8 is detachably connected to the pull plate 3. When it is necessary to pull the plugging assembly 4 to move, the handwheel 7 can be rotated to drive the threaded valve rod 6 to rotate, thereby pushing the fixed seat 8 provided with the pull plate 3 to move downward, and further pushing the plugging assembly 4 into the valve body 1 to realize the sealing of the valve body 1.

[0025] In an embodiment of the present utility model, to further ensure the sealing effect of the valve, positioning rings 407 are constructed at the bottom ends on both sides of the central support plate 401, and the positioning rings 407 are inserted and matched with the positioning cavities 405. On one side of the valve plate 402 facing the central support plate 401, two guide rods 408 are symmetrically constructed, and guide holes for the sliding arrangement of the guide rods 408 are opened at the bottom ends on both sides of the central support plate 401. Through the arrangement of the positioning rings 407, when the two elastic sealing rings 406 expand and push the valve plate 402 to move, by inserting the two positioning rings 407 into the corresponding positioning cavities 405 on the valve plate 402, and cooperating with the two guide rods 408 slidably arranged in the corresponding guide cavities 409, the positioning of the positioning cavities 405 is realized, so as to avoid the problem of the valve plate 402 offset due to extrusion, and further ensure the sealing effect of the valve.

[0026] Working principle: This embodiment provides a low-temperature resistant elastic energy storage sealing valve. When in use, by installing the valve in the pipeline for transporting low-temperature medium, when it is necessary to cut off the transportation of the medium, the handwheel 7 can be rotated to drive the threaded valve rod 6 to rotate, thereby pushing the fixed seat 8 provided with the pull plate 3 to move downward, and further pushing the plugging assembly 4 into the valve body 1. When the central support plate 401 enters the valve body 1, the two valve plates 402 provided with elastic sealing rings 406 complete the plugging of both sides inside the valve body 1, realizing the cut-off of the low-temperature medium. When the elastic sealing rings 406 shrink due to the influence of the low-temperature medium, the spring 404 generates a pushing force on the valve plate 402 to ensure the pressure of the valve plate 402 provided with the elastic sealing rings 406 acting on the valve body 1. When the temperature of the low-temperature medium rises, when the elastic sealing rings 406 expand and abut against the inner wall of the valve body 1, the spring 404 absorbs the pressure generated on the elastic sealing rings 406, thus avoiding the problem of difficult opening and closing due to extrusion while ensuring the sealing performance.

[0027] The embodiments disclosed in the present utility model are preferred embodiments, but are not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present utility model based on the above embodiments and make different extensions and changes, but as long as they do not depart from the spirit of the present utility model, they are within the protection scope of the present utility model.

Claims

1. A low-temperature resistant elastic energy storage sealing valve, characterized in that, It includes a valve body (1) and a valve seat (2) detachably installed on the top of the valve body (1); A push-pull mechanism is detachably installed on the top of the valve body (1), and an actuator end of the push-pull mechanism is detachably installed with a pull plate (3). A through groove is centrally formed at the top end of the valve seat (2), and a sealing component (4) for sealing the valve body (1) is fixedly installed at one end of the pull plate (3) passing through the through groove; The sealing component (4) includes a central support plate (401) and valve plates (402) distributed at the bottoms on both sides of the central support plate (401). The top end of the central support plate (401) is fixedly connected to the pull plate (3), and a through groove (403) is formed at the center of the bottom end on one side of the central support plate (401). A spring (404) is arranged at the center of the through groove (403); A positioning cavity (405) is formed at the center of the side of the valve plate (402) facing the central support plate (401), and one end of the spring (404) is fixedly installed at the center of one side inside the positioning cavity (405). An annular groove is formed on the outer edge surface of the valve plate (402) away from the central support plate (401), and an elastic sealing ring (406) is arranged in the annular groove. The valve plate (402) provided with the elastic sealing ring (406) abuts against one side inside the valve body (1).

2. The cryogenic-resistant elastic energy storage sealing valve according to claim 1, characterized in that The push-pull mechanism includes a U-shaped support seat (5) detachably installed at the top end of the valve body (1), and a threaded hole is formed at the center of the top end of the U-shaped support seat (5). A threaded valve rod (6) is threadedly engaged and installed in the threaded hole; 3. The cryogenic-resistant elastic energy storage sealing valve according to claim 2, wherein A handwheel (7) is fixedly installed at the top end of the threaded valve rod (6), and a fixed seat (8) is rotatably connected to the bottom end of the handwheel (7). The fixed seat (8) is detachably connected to the pull plate (3).

4. The cryogenic-resistant elastic energy storage sealing valve according to claim 1, wherein Positioning rings (407) are respectively constructed at the bottom ends on both sides of the central support plate (401), and the positioning rings (407) are in plug-in fit with the positioning cavities (405).

5. The cryogenic-resistant elastic energy storage sealing valve according to claim 1, wherein Two guide rods (408) are symmetrically constructed on the side of the valve plate (402) facing the central support plate (401), and guide holes for the guide rods (408) to slide are respectively formed at the bottom ends on both sides of the central support plate (401).

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