Low-temperature high-pressure regulating valve

Abstract

The utility model relates to the field of low-temperature and high-pressure regulating valves, in particular to a low-temperature and high-pressure regulating valve which comprises a valve body, a valve cover is arranged at the top of the valve body, a first rectangular groove is formed in the upper portion of an inner cavity of the valve body, sealing filler is arranged on the inner side of the first rectangular groove, and a first piston is connected to the inner side of the sealing filler in a sliding mode. A piston rod is in bolted connection with the top of the first piston, threaded rods are in bolted connection with the periphery of the top of the valve body, threaded sleeves are rotationally connected with the periphery of the top of the valve deck through bearings, and driven gear rings are in bolted connection with the outer sides of the threaded sleeves. Through the first piston, the second piston, the third piston, the annular ladder groove, the sealing valve strip and other components, when flow needs to be adjusted, the piston rod needs to be moved upwards again, the distance between the third piston and the top of the inner cavity of the valve body is shortened, the flow can be controlled to be reduced at the moment until the third piston is closed, and the effect of adjusting the flow is achieved.

Description

Technical Field

[0001] The utility model relates to the field of cryogenic high-pressure regulating valves, and particularly relates to a cryogenic high-pressure regulating valve. Background Art

[0002] In the automatic control of modern factories, regulating valves play a very important role. The production of these factories depends on the correct distribution and control of the flowing medium. Whether it is the exchange of energy, the reduction of pressure, or simply the feeding of a container, some final control elements are required to complete these controls. The regulating valve plays the role of a variable resistance in the pipeline.

[0003] After retrieval, a high-pressure differential regulating valve with the publication number of CN202220872488.7 specifically discloses a filter tube and a regulating valve body arranged on one side of the filter tube. A positioning ring is fixedly connected to the inner wall of one side of the filter tube. A connecting ring is arranged on one side of the positioning ring. A filter cover is fixedly connected to the outer wall of one side of the connecting ring. A connecting pipe is fixedly connected to the top of the regulating valve body. A thread groove is formed on the outer wall of the connecting pipe, and an outer thread of the thread groove on the outer wall of the connecting pipe is threadedly connected with a positioning sleeve. A threaded hole is formed in the top of the positioning sleeve, and an adjusting screw rod is threadedly connected to the threaded hole in the top of the positioning sleeve. A sealing plug is fixedly connected to the bottom of the adjusting screw rod. A support column is fixedly connected to the bottom of the sealing plug. This high-pressure differential regulating valve not only has a filtering function but also can adjust the pressure of the regulating valve according to the use requirements.

[0004] However, the above device still has certain defects. For example, a common single-seat regulating valve is composed of a valve body, a valve seat, a valve core, a valve cover, a valve rod, a packing mechanism, fasteners, and sealing parts. When the supporting actuator receives a control signal to perform an up-and-down linear movement, the valve core is located below, and the regulating valve is in a closed state. When the valve core is located above, the regulating valve is in an open state. During the use of traditional regulating valves, they can only control a single flow rate and cannot be adjusted. Moreover, when the flow rate is too large, it is easy to cause cavitation and erosion on the inner wall of the valve body.

[0005] Therefore, it is very necessary to invent a cryogenic high-pressure regulating valve to solve the above problems. Content of the Utility Model

[0006] The purpose of the utility model is to provide a cryogenic high-pressure regulating valve that can effectively solve the above technical problems.

[0007] To achieve the above object, the present utility model provides the following technical solution: a low-temperature high-pressure regulating valve, including a valve body, a valve cover is provided at the top of the valve body, a first rectangular groove is opened in the upper part of the inner cavity of the valve body, a sealing packing is arranged inside the first rectangular groove, a first piston is slidably connected inside the sealing packing, a piston rod is bolted to the top of the first piston, threaded rods are bolted to the four circumferences of the top of the valve body, threaded sleeves are rotatably connected to the four circumferences of the top of the valve cover through bearings, a driven gear ring is bolted to the outside of the threaded sleeve, a rotating shell is rotatably connected to the upper part of the outside of the valve cover, a driving gear ring is bolted to the lower part of the surface of the rotating shell, and the surface of the driving gear ring meshes with the surface of the driven gear ring. A limiting ring is bolted to the middle of the surface of the valve cover, and a filling spacer is arranged inside the inner cavity of the valve cover.

[0008] Preferably, an inflow channel is opened on the right side of the inner cavity of the valve body, and an outflow channel is opened on the left side of the inner cavity of the valve body, so that the fluid enters the valve body through the inflow channel and is discharged from the valve body through the outflow channel.

[0009] Preferably, an annular stepped groove is opened on the right side of the bottom of the outflow channel, and a sealing valve strip is arranged at the top of the annular stepped groove, so that the annular stepped groove can be interlocked and sealed with the second piston. By arranging the sealing valve strip, the sealing effect inside the valve body is improved.

[0010] Preferably, a connecting rod is bolted to the bottom of the first piston, and a second piston is bolted to the middle of the connecting rod, so that the second piston moves synchronously by the vertical movement of the connecting rod.

[0011] Preferably, a third piston is bolted to the bottom of the connecting rod, and fixed flanges are bolted to both sides of the valve body, so that the valve body can be connected to the pipeline through the fixed flanges.

[0012] Preferably, positioning rods are bolted in an annular arrangement on the outside of the top of the valve body, and positioning grooves are opened in an annular arrangement on the inside of the valve cover, so that the valve body can be quickly positioned and connected to the valve cover through the positioning rods and the positioning grooves.

[0013] Preferably, through grooves are opened in an annular arrangement on the inside of the valve cover, so that the threaded rods can pass through the valve cover through the through grooves.

[0014] Preferably, a first sealing ring is bolted to the bottom of the valve cover, and a second sealing ring is bolted to the top of the valve body, so that the valve cover and the valve body can improve the sealing through the first sealing ring and the second sealing ring.

[0015] In the above technical solution, the technical effects and advantages provided by the present utility model are:

[0016] Through components such as the first piston, the second piston, the third piston, the annular stepped groove, and the sealing valve strip, when adjusting the flow rate, it is necessary to move the piston rod upward again. The distance between the third piston and the top of the inner cavity of the valve body is shortened, and at this time, the flow rate will be controlled to decrease until the third piston is closed to achieve the effect of adjustable flow rate;

[0017] Through components such as the threaded sleeve, the threaded rod, the driven gear ring, and the rotating shell, during the use of the device, the valve body and the valve cover are quickly connected and fixed, so that the piston inside the valve body can be quickly replaced after aging, improving the practicability of the valve body. Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Front view of the overall structure of the present utility model;

[0020] Figure 2 Front sectional view of the overall structure of the present utility model;

[0021] Figure 3 Of the present utility model Figure 2 Enlarged view of the structure at A;

[0022] Figure 4 Of the present utility model Figure 2 Enlarged view of the structure at B;

[0023] Figure 5 Of the present utility model Figure 2 Enlarged view of the structure at C.

[0024] Explanation of the reference numerals in the drawings:

[0025] 1. Valve body; 2. Valve cover; 3. First rectangular groove; 4. Sealing packing; 5. First piston; 6. Piston rod; 7. Threaded rod; 8. Threaded sleeve; 9. Driven gear ring; 10. Rotating shell; 11. Driving gear ring; 12. Limiting ring; 13. Filling spacer; 14. Inflow channel; 15. Outflow channel; 16. Annular stepped groove; 17. Sealing valve strip; 18. Connecting rod; 19. Second piston; 20. Third piston; 21. Fixed flange; 22. Positioning rod; 23. Positioning groove; 24. Through groove; 25. First sealing ring; 26. Second sealing ring. Detailed Description of the Embodiments

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] The utility model provides Figures 1-5 A low-temperature and high-pressure regulating valve shown in the figure comprises a valve body 1, a valve cover 2 is arranged on the top of the valve body 1, a first rectangular groove 3 is opened on the upper part of the inner cavity of the valve body 1, a sealing packing 4 is arranged on the inner side of the first rectangular groove 3, a first piston 5 is slidably connected to the inner side of the sealing packing 4, a piston rod 6 is bolted to the top of the first piston 5, threaded rods 7 are bolted on all sides of the top of the valve body 1, threaded sleeves 8 are rotatably connected to the top of the valve cover 2 through bearings, a driven gear ring 9 is bolted on the outer side of the threaded sleeve 8, a rotating shell 10 is rotatably connected to the upper part of the outer side of the valve cover 2, a driving gear ring 11 is bolted on the lower part of the surface of the rotating shell 10, and the surface of the driving gear ring 11 is meshed with the surface of the driven gear ring 9, a limiting ring 12 is bolted on the middle part of the surface of the valve cover 2, and a filling spacer 13 is arranged on the inner side of the inner cavity of the valve cover 2.

[0028] An inlet cavity 14 is opened on the right side of the inner cavity of the valve body 1 , and an outlet cavity 15 is opened on the left side of the inner cavity of the valve body 1 , so that the fluid enters the valve body 1 through the inlet cavity 14 and is discharged from the valve body 1 through the outlet cavity 15 .

[0029] An annular ladder groove 16 is provided on the right side of the bottom of the outlet cavity 15 , and a sealing valve strip 17 is provided on the top of the annular ladder groove 16 so that the annular ladder groove 16 can be sealed in conjunction with the second piston 19 . By providing the sealing valve strip 17 , the sealing effect in the valve body 1 is improved.

[0030] A connecting rod 18 is bolted to the bottom of the first piston 5 , and a second piston 19 is bolted to the middle of the connecting rod 18 . The second piston 19 is driven to move synchronously by the vertical movement of the connecting rod 18 .

[0031] A third piston 20 is bolted to the bottom of the connecting rod 18 , and fixing flanges 21 are bolted to both sides of the valve body 1 , so that the valve body 1 can be connected to the pipeline through the fixing flanges 21 .

[0032] The outer side of the top of the valve body 1 is annularly bolted with a positioning rod 22 , and the inner side of the valve cover 2 is annularly provided with a positioning groove 23 , so that the valve body 1 can be quickly positioned and connected with the valve cover 2 through the positioning rod 22 and the positioning groove 23 .

[0033] The inner side of the valve cover 2 is provided with through grooves 24 arranged in an annular pattern, so that the threaded rod 7 can pass through the valve cover 2 through the through grooves 24 .

[0034] A first sealing ring 25 is bolted to the bottom of the valve cover 2 , and a second sealing ring 26 is bolted to the top of the valve body 1 , so that the valve cover 2 and the valve body 1 can be sealed better through the first sealing ring 25 and the second sealing ring 26 .

[0035] Refer to the attached drawings of the specification Figures 1-5 , Working principle: During the use of the device, the fluid enters the inflow chamber 14 from the right side and reaches inside the valve body 1. At this time, the piston rod 6 is moved upward to disengage the second piston 19 in the trapezoidal ring groove therefrom. The fluid enters the outflow chamber 15 through the annular trapezoidal groove 16. When it is desired to adjust the flow rate, the piston rod 6 needs to be moved upward again. The distance between the third piston 20 and the top of the inner cavity of the valve body 1 is shortened, and at this time, the flow rate will be controlled to decrease until the third piston 20 is closed to achieve the effect of adjustable flow rate. By rotating the rotating shell 10, the driving gear ring 11 at the bottom of the rotating shell 10 drives the driven gear ring 9 to rotate, and then the driven gear ring 9 drives the threaded sleeve 8 to rotate. In a synchronous rotation manner, the threaded rod 7 is disengaged from the inside of the threaded sleeve 8, so that the valve body 1 and the valve cover 2 are separated from each other, and then the piston rod 6 and the piston block inside the valve body 1 are replaced. When the replacement is completed, only by rotating the rotating shell 10 in the reverse direction can the valve body 1 and the valve cover 2 be quickly connected and fixed, enabling the piston inside the valve body 1 to be quickly replaced after aging, and improving the practicality of the valve body 1.

[0036] Only some exemplary embodiments of the present invention have been described by way of illustration above. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A low-temperature and high-pressure regulating valve, comprising a valve body (1), characterized in that: A valve cover (2) is provided at the top of the valve body (1). A first rectangular groove (3) is formed in the upper part of the inner cavity of the valve body (1). A sealing packing (4) is arranged inside the first rectangular groove (3). A first piston (5) is slidably connected inside the sealing packing (4). A piston rod (6) is bolted to the top of the first piston (5). Threaded rods (7) are bolted to the four peripheries of the top of the valve body (1). Threaded sleeves (8) are rotatably connected through bearings to the four peripheries of the top of the valve cover (2). A driven gear ring (9) is bolted to the outer side of the threaded sleeve (8). A rotating shell (10) is rotatably connected to the upper part of the outer side of the valve cover (2). A driving gear ring (11) is bolted to the lower part of the surface of the rotating shell (10), and the surface of the driving gear ring (11) meshes with the surface of the driven gear ring (9). A limiting ring (12) is bolted to the middle of the surface of the valve cover (2). A filling spacer (13) is arranged inside the inner cavity of the valve cover (2).

2. The cryogenic high-pressure regulating valve according to claim 1, wherein: An inflow channel (14) is formed in the right side of the inner cavity of the valve body (1), and an outflow channel (15) is formed in the left side of the inner cavity of the valve body (1).

3. The cryogenic high-pressure regulating valve according to claim 1, characterized in that: An annular ladder groove (16) is formed in the right side of the bottom of the outflow channel (15), and a sealing valve strip (17) is arranged at the top of the annular ladder groove (16).

4. The cryogenic high-pressure regulating valve according to claim 1, characterized in that: A connecting rod (18) is bolted to the bottom of the first piston (5), and a second piston (19) is bolted to the middle of the connecting rod (18).

5. The cryogenic high-pressure regulating valve according to claim 1, wherein: A third piston (20) is bolted to the bottom of the connecting rod (18), and fixed flanges (21) are bolted to both sides of the valve body (1).

6. The cryogenic high-pressure regulating valve according to claim 1, characterized in that: Positioning rods (22) are bolted in an annular arrangement on the outer side of the top of the valve body (1), and positioning grooves (23) are formed in an annular arrangement on the inner side of the valve cover (2).

7. A low-temperature high-pressure regulating valve according to claim 1, characterized in that: Through grooves (24) are formed in an annular arrangement on the inner side of the valve cover (2).

8. A low-temperature and high-pressure regulating valve according to claim 1, characterized in that: A first sealing ring (25) is bolted to the bottom of the valve cover (2), and a second sealing ring (26) is bolted to the top of the valve body (1).

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