Gas pipeline pressure regulating device

Abstract

The utility model belongs to the technical field of gas pipelines, and particularly relates to a gas pipeline pressure regulating device which comprises a valve body, a valve seat is arranged in the valve body, the valve body is divided into a high-pressure cavity and a low-pressure cavity through the valve seat, a first shell is fixedly arranged at the top end of the valve body, a diaphragm is arranged in the first shell, and the interior of the first shell is divided into a first cavity and a second cavity through the diaphragm. A valve element is fixedly arranged in the middle of the diaphragm, the bottom end of the valve element penetrates through the inner wall of the valve seat and extends into the low-pressure cavity, a loading assembly is fixedly arranged at the top end of the first shell and used for controlling the opening degree of the valve element, a pressure sensor is arranged in the low-pressure cavity and electrically connected with a controller, and a micro-motion pressure adjusting assembly is arranged on the valve body. The micro-motion pressure regulating assembly is used for controlling the operation degree of the diaphragm and electrically connected with the controller. According to the utility model, the pressure can be automatically adjusted, and the fluctuation of gas pressure can be resisted.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas pipelines, and in particular relates to a gas pipeline pressure regulating device. Background Art

[0002] The gas pipe is a special pipeline for transporting combustible gas. The gas pipe has the characteristics of easy installation, reliable connection, corrosion resistance, no gas blockage, good flexibility, long service life, and can be bent arbitrarily without deformation or gas blocking. The surface soft protective layer material is safer, easier to clean and beautiful.

[0003] Existing gas pipelines inevitably experience pressure instability during use, and are prone to rupture of gas pipes or connections between gas pipes, resulting in gas leakage, which seriously affects public safety. The above problem is usually solved by installing a pressure regulating valve on the gas pipeline.

[0004] Patent No. 202122486386.X discloses a gas pipeline pressure regulating device. When the pressure in the low-pressure chamber increases, the gas enters the first chamber through the connecting piece and acts on the diaphragm. The diaphragm pulls the valve core upward to reduce the opening, thereby reducing the pressure in the low-pressure chamber, thereby ensuring the pressure balance in the low-pressure chamber. However, when there is a fluctuation in the pressure reduction in the high-pressure chamber, the pressure reduction in the low-pressure chamber is unbalanced, and automatic adjustment cannot be achieved. For this reason, a gas pipeline pressure regulating device is provided to solve the above technical problems. Utility Model Content

[0005] The utility model aims to provide a gas pipeline pressure regulating device to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides a gas pipeline pressure regulating device, including a valve body, a valve seat is arranged in the valve body, the valve body is divided into a high-pressure chamber and a low-pressure chamber by the valve seat, a shell one is fixedly arranged on the top of the valve body, a diaphragm is arranged in the shell one, the interior of the shell one is divided into chamber one and chamber two by the diaphragm, a valve core is fixedly arranged in the middle of the diaphragm, the bottom end of the valve core passes through the inner wall of the valve seat and extends into the low-pressure chamber, a loading assembly is fixedly arranged on the top of the shell one, the loading assembly is used to control the opening degree of the valve core, a pressure sensor is arranged in the low-pressure chamber, the pressure sensor is electrically connected to a controller, a micro-pressure regulating assembly is arranged on the valve body, the micro-pressure regulating assembly is used to control the operation degree of the diaphragm, and the micro-pressure regulating assembly is electrically connected to the controller.

[0007] Preferably, the loading assembly includes a shell two fixedly connected to the top end of the shell one, the shell one is communicated with the shell two, the top end of the shell two is threadedly connected to a threaded rod, the top end of the threaded rod is fixedly connected to a handle, the bottom end of the threaded rod is rotatably connected to a pressure plate, the pressure plate is arranged in the shell two, and the pressure plate is sealed with the inner wall of the shell two, a spring is arranged between the pressure plate and the diaphragm, and the two ends of the spring are respectively abutted against the pressure plate and the diaphragm.

[0008] Preferably, the outer wall of the pressure plate is provided with an annular groove, and a second sealing ring is provided on the pressure plate. The second sealing ring is fixedly sleeved on the pressure plate through the annular groove, and the pressure plate is sealed with the inner wall of the shell two through the second sealing ring.

[0009] Preferably, a limit ring is fixedly connected to the bottom end of the seat hole on the valve seat, a sealing ring 1 is fixedly connected to the top end of the limit ring, and the sealing ring 1 is arranged in the seat hole.

[0010] Preferably, the fine-motion pressure regulating assembly includes a plunger cylinder, a bracket is fixedly connected to the outer wall of the valve body, a horizontal mounting plate is fixedly connected to the top of the bracket, the plunger cylinder is fixedly mounted on the top of the horizontal mounting plate, a piston is slidably arranged in the plunger cylinder, one end of the plunger is fixedly connected to the middle of the piston, the other end of the plunger passes through the inner wall of the plunger cylinder and is fixedly connected to a rack, an end of the plunger cylinder away from the plunger is connected to the chamber through a conduit, a reduction motor is fixedly mounted on the top of the horizontal mounting plate, a gear is fixedly connected to the output end of the reduction motor, the gear is meshed with the rack, and the reduction motor is electrically connected to the controller.

[0011] Preferably, a box is fixedly mounted on the valve seat, and the controller and the fine-motion pressure regulating assembly are both arranged in the box.

[0012] Compared with the prior art, the utility model has the following advantages and technical effects:

[0013] The utility model provides a gas pipeline pressure regulating device, which can control the opening degree of the valve core through the set pressurizing component, and there is a pressure difference between the gas in the high-pressure chamber and the low-pressure chamber, thereby realizing the pressure regulating function;

[0014] The set pressure sensor can detect the gas pressure in the low-pressure chamber and input it to the controller. The controller controls the fine-pressure adjustment component to adjust the operation degree of the diaphragm. The diaphragm drives the valve core to change the opening degree of the valve core, thereby ensuring the pressure in the low-pressure chamber is stable and can resist gas pressure fluctuations.

[0015] The utility model can realize automatic adjustment of pressure and resist fluctuation of gas pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor:

[0017] Figure 1 This is a cross-sectional view of a gas pipeline pressure regulating device proposed by the utility model;

[0018] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0019] Among them: 1. Valve body; 2. Valve seat; 3. High-pressure chamber; 4. Low-pressure chamber; 5. Limit ring; 6. Sealing ring 1; 7. Valve core; 8. Shell 1; 9. Diaphragm; 10. Chamber 1; 11. Chamber 2; 12. Pressure plate; 13. Sealing ring 2; 14. Threaded rod; 15. Handle; 16. Box; 17. Pressure sensor; 18. Controller; 19. Horizontal mounting plate; 20. Plunger cylinder; 21. Plunger; 22. Piston; 23. Conduit; 25. Reduction motor; 26. Gear; 27. Rack; 28. Shell 2; 29. ​​Spring; 30. Bracket. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] Reference Figure 1 to Figure 2As shown, the utility model provides a gas pipeline pressure regulating device, including a valve body 1, a valve seat 2 is arranged in the valve body 1, the valve body 1 is divided into a high-pressure chamber 3 and a low-pressure chamber 4 by the valve seat 2, a shell 8 is fixedly arranged on the top of the valve body 1, a diaphragm 9 is arranged in the shell 8, the interior of the shell 8 is divided into a chamber 10 and a chamber 2 11 by the diaphragm 9, a valve core 7 is fixedly arranged in the middle of the diaphragm 9, the bottom end of the valve core 7 passes through the inner wall of the valve seat 2 and extends into the low-pressure chamber 4, a loading assembly is fixedly arranged on the top of the shell 8, the loading assembly is used to control the opening degree of the valve core 7, a pressure sensor 17 is arranged in the low-pressure chamber 4, the pressure sensor 17 is electrically connected to the controller 18, a micro-motion pressure regulating assembly is arranged on the valve body 1, the micro-motion pressure regulating assembly is used to control the operation degree of the diaphragm 9, and the micro-motion pressure regulating assembly is electrically connected to the controller 18.

[0023] The opening degree of the valve core 7 can be controlled by the pressurizing component, and there is a pressure difference between the gas in the high-pressure chamber 3 and the low-pressure chamber 4, thereby realizing the pressure regulating function;

[0024] The gas pressure in the low-pressure chamber 4 can be detected by the set pressure sensor and input into the controller 18. The controller 18 controls the fine-tuning pressure component to adjust the operation degree of the diaphragm 9. The diaphragm 9 drives the valve core 7 to change the opening degree of the valve core 7, thereby ensuring the pressure in the low-pressure chamber 4 is stable and can resist gas pressure fluctuations.

[0025] The utility model can realize automatic adjustment of pressure and resist fluctuation of gas pressure.

[0026] Furthermore, the loading assembly includes a shell 28 fixedly connected to the top of the shell 1 8, the shell 1 8 is communicated with the shell 2 28, the top of the shell 2 28 is threadedly connected with a threaded rod 14, the top of the threaded rod 14 is fixedly connected with a handle 15, the bottom end of the threaded rod 14 is rotatably connected with a pressure plate 12, the pressure plate 12 is arranged in the shell 2 28, and the pressure plate 12 is sealed with the inner wall of the shell 2 28, a spring 29 is provided between the pressure plate 12 and the diaphragm 9, and the two ends of the spring 29 are respectively abutted against the pressure plate 12 and the diaphragm 9.

[0027] By rotating the handle 15, the handle 15 drives the threaded rod 14 to rotate at the top end of the shell 28, and the threaded rod 14 drives the pressure plate 12 to perform piston movement in the shell 28. At the same time, the compression amount of the spring 29 can be adjusted by moving the pressure plate 12, thereby adjusting the operation degree of the diaphragm 9. The diaphragm 9 drives the valve core 7 to move, thereby adjusting the opening of the valve core 7 to achieve gas pressure regulation.

[0028] Furthermore, in order to improve the sealing performance, an annular groove is provided on the outer wall of the pressure plate 12, and a sealing ring 13 is provided on the pressure plate 12. The sealing ring 13 is fixedly sleeved on the pressure plate 12 through the annular groove, and the pressure plate 12 is sealed with the inner wall of the shell 28 through the sealing ring 13.

[0029] Furthermore, a limit ring 5 is fixedly connected to the bottom end of the seat hole on the valve seat 2, a sealing ring 6 is fixedly connected to the top end of the limit ring 5, and the sealing ring 6 is arranged in the seat hole.

[0030] The sealing ring 6 is provided to improve the sealing performance between the valve core 7 and the valve seat 2, so that the gas in the pipeline can be blocked.

[0031] Furthermore, the fine-motion pressure regulating assembly includes a plunger barrel 20, a bracket 30 is fixedly connected to the outer wall of the valve body 1, a horizontal mounting plate 19 is fixedly connected to the top of the bracket 30, the plunger barrel 20 is fixedly mounted on the top of the horizontal mounting plate 19, a piston 22 is slidably arranged in the plunger barrel 20, one end of the plunger 21 is fixedly connected to the middle of the piston 22, the other end of the plunger 21 passes through the inner wall of the plunger barrel 20 and is fixedly connected to a rack 27, one end of the plunger barrel 20 away from the plunger 21 is connected to the chamber 10 through a conduit 23, a reduction motor 25 is fixedly mounted on the top of the horizontal mounting plate 19, a gear 26 is fixedly connected to the output end of the reduction motor 25, the gear 26 is meshed with the rack 27, and the reduction motor 25 is electrically connected to the controller 18.

[0032] The pressure sensor 17 detects the gas pressure of the low-pressure chamber 4 and inputs it to the controller 18. When the gas pressure of the low-pressure chamber 4 is lower than the preset value, the controller 18 controls the reduction motor 25 to rotate, and the rotation of the reduction motor 25 drives the gear 26 to rotate. Through the transmission cooperation between the gear 26 and the rack 27, the gear 26 drives the rack 27 and the plunger 21 to move, and the plunger 21 drives the piston 22 to move. At this time, the gas in the chamber 10 is sucked into the plunger cylinder 20 through the movement of the piston, so that the pressure in the chamber 10 is reduced. Under the action of negative pressure, the diaphragm 9 drives the valve core 7 to move upward to increase the opening, thereby increasing the pressure in the low-pressure chamber 4, so that the low-pressure chamber 4 is filled with air. When the pressure in the low-pressure chamber 4 reaches the preset value, the controller 18 controls the reduction motor 25 to stop running; on the contrary, when the pressure in the low-pressure chamber 4 exceeds the preset value, the controller 18 controls the reduction motor 25 to rotate in the opposite direction, and the gear 26 drives the rack 27 and the plunger 21 to move in the opposite direction. The plunger 21 drives the plunger 21 to move and pushes the gas in the plunger tube 20 into the chamber 10, and increases the pressure in the chamber 10. The diaphragm 9 drives the valve core 7 to move downward under the action of the spring 29, reducing the opening of the valve core 7, thereby increasing the pressure of the gas in the low-pressure chamber 4, making the gas in the low-pressure chamber 4 stable and reaching the preset value, thereby realizing automatic regulation of the pressure of the gas in the low-pressure chamber 4.

[0033] Furthermore, in order to prevent rainwater, a box body 16 is fixedly installed on the valve seat 2 , and the controller 18 and the fine-motion pressure regulating assembly are both arranged in the box body 16 .

[0034] The gas pipeline pressure regulating device provided by the utility model has a working principle as follows: when in use, the high-pressure chamber 3 is connected to the gas inlet, the low-pressure chamber 4 is connected to the gas outlet, the handle 15 is rotated, the handle 15 drives the threaded rod 14 to rotate at the top of the shell 28, the threaded rod 14 drives the pressure plate 12 to do piston movement in the shell 28, and at the same time, the compression amount of the spring 29 can be adjusted by the movement of the pressure plate 12, thereby adjusting the operation degree of the diaphragm 9, the diaphragm 9 drives the valve core 7 to move, thereby adjusting the opening of the valve core 7 until the preset value is adjusted. When the gas pressure in the low-pressure chamber 4 is lower than the preset value, the pressure sensor 17 detects a signal input to the controller 18, the controller 18 controls the reduction motor 25 to rotate, the reduction motor 25 rotates and drives the gear 26 to rotate, through the transmission cooperation of the gear 26 and the rack 27, the gear 26 drives the rack 27 and the plunger 21 to move, the plunger 21 drives the piston 22 to move, at this time , the gas in chamber 10 is sucked into the plunger tube 20 through the movement of the piston, so that the pressure in chamber 10 is reduced, and the diaphragm 9 drives the valve core 7 to move upward under the action of negative pressure to increase the opening, thereby increasing the pressure in the low-pressure chamber 4, so that the pressure in the low-pressure chamber 4 reaches a preset value. At this time, the controller 18 controls the reduction motor 25 to stop running; on the contrary, when the pressure in the low-pressure chamber 4 exceeds the preset value, the controller 18 controls the reduction motor 25 to rotate in the opposite direction, the gear 26 drives the rack 27 and the plunger 21 to move in the opposite direction, and the plunger 21 drives the plunger 21 to move and push the gas in the plunger tube 20 into the chamber 10, and increase the pressure in the chamber 10, the diaphragm 9 drives the valve core 7 to move downward under the action of the spring 29, reduces the opening of the valve core 7, thereby increasing the pressure of the gas in the low-pressure chamber 4, making the gas in the low-pressure chamber 4 stable and reaching the preset value, thereby realizing automatic regulation of the pressure of the gas in the low-pressure chamber 4.

[0035] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

Claims

1. A gas pipeline pressure regulating device, characterized in that: The invention comprises a valve body (1), wherein a valve seat (2) is arranged in the valve body (1), and the valve body (1) is divided into a high-pressure chamber (3) and a low-pressure chamber (4) by the valve seat (2); a shell (8) is fixedly arranged at the top of the valve body (1), a diaphragm (9) is arranged in the shell (8), and the interior of the shell (8) is divided into a chamber (10) and a chamber (11) by the diaphragm (9); a valve core (7) is fixedly arranged in the middle of the diaphragm (9), and the bottom end of the valve core (7) passes through the valve seat. (2) and extends into the low-pressure chamber (4); a loading assembly is fixedly provided at the top end of the shell (8); the loading assembly is used to control the opening degree of the valve core (7); a pressure sensor (17) is provided in the low-pressure chamber (4); the pressure sensor (17) is electrically connected to a controller (18); a micro-pressure regulating assembly is provided on the valve body (1); the micro-pressure regulating assembly is used to control the operation degree of the diaphragm (9); the micro-pressure regulating assembly is electrically connected to the controller (18).

2. The gas pipeline pressure regulating device according to claim 1, characterized in that: The loading assembly comprises a second shell (28) fixedly connected to the top of the first shell (8), the first shell (8) is communicated with the second shell (28), the top of the second shell (28) is threadedly connected to a threaded rod (14), the top of the threaded rod (14) is fixedly connected to a handle (15), the bottom of the threaded rod (14) is rotatably connected to a pressure plate (12), the pressure plate (12) is arranged in the second shell (28), and the pressure plate (12) is sealed with the inner wall of the second shell (28), a spring (29) is arranged between the pressure plate (12) and the diaphragm (9), and the two ends of the spring (29) are respectively in contact with the pressure plate (12) and the diaphragm (9).

3. The gas pipeline pressure regulating device according to claim 2, characterized in that: The outer wall of the pressure plate (12) is provided with an annular groove, and the pressure plate (12) is provided with a second sealing ring (13). The second sealing ring (13) is fixedly sleeved on the pressure plate (12) through the annular groove, and the pressure plate (12) is sealed with the inner wall of the second shell (28) through the second sealing ring (13).

4. The gas pipeline pressure regulating device according to claim 1, characterized in that: The bottom end of the seat hole on the valve seat (2) is fixedly connected to a limit ring (5), the top end of the limit ring (5) is fixedly connected to a sealing ring (6), and the sealing ring (6) is arranged in the seat hole.

5. The gas pipeline pressure regulating device according to claim 2, characterized in that: The micro-motion pressure regulating assembly comprises a plunger cylinder (20), a bracket (30) is fixedly connected to the outer wall of the valve body (1), the top end of the bracket (30) is fixedly connected to the horizontal mounting plate (19), the plunger cylinder (20) is fixedly mounted on the top end of the horizontal mounting plate (19), a piston (22) is slidably arranged in the plunger cylinder (20), one end of the plunger (21) is fixedly connected to the middle of the piston (22), and the other end of the plunger (21) passes through the plunger cylinder The inner wall of the piston cylinder (20) is fixedly connected with a rack (27), the end of the piston cylinder (20) away from the piston (21) is connected with the chamber one (10) through a conduit (23), the top of the horizontal mounting plate (19) is fixedly installed with a reduction motor (25), the output end of the reduction motor (25) is fixedly connected with a gear (26), the gear (26) is meshed with the rack (27), and the reduction motor (25) is electrically connected with the controller (18).

6. The gas pipeline pressure regulating device according to claim 1, characterized in that: A box body (16) is fixedly mounted on the valve seat (2), and the controller (18) and the fine-motion pressure regulating assembly are both arranged in the box body (16).

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