Pressure adjusting device for gas production pipeline

Abstract

The utility model relates to the technical field of gas production pipeline adjustment, and particularly discloses a gas production pipeline pressure adjusting device which comprises a pressure release valve, a first pipe joint is arranged on one side of the pressure release valve, a second pipe joint is arranged on the other side of the pressure release valve, and the second pipe joint is connected with a pressure release storage tank. A pressure adjusting seat is arranged at the upper end of the pressure release valve, a pressure adjusting screw is arranged at the upper end of the pressure adjusting seat, an adjusting box is arranged at the upper end of the pressure adjusting seat, a rotating column is arranged on the outer side of the adjusting box, and one end of the rotating column is fixedly connected with a self-locking transmission part arranged in the adjusting box. The pressure relief valve is connected with the high-pressure storage tank, overpressure gas is temporarily stored through the high-pressure storage tank and is reinjected into the pipeline after the pressure of the system is recovered, and safe discharge is ensured when the pressure exceeds the limit. During pressure regulation, self-locking transmission can ensure that the pressure regulating screw cannot loosen and turn over when the rotating column stops rotating, pressure regulation safety is ensured, a handle on the outer side of the rotating column is designed in a storage mode, rotation of the rotating column caused by mistaken touch of foreign personnel can be prevented during storage, and use safety of the pressure regulating device is further ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas production pipeline adjustment technical field especially, relates to a kind of gas production pipeline pressure regulating device. BACKGROUND

[0002] With the social demand for clean energy expanding, natural gas prices continue to rise, people's understanding of shale gas rapidly improves. Especially horizontal well and fracturing technology level continues to progress, human exploration and development of shale gas is forming a craze. In order to ensure the normal operation of mining work, gas wellhead pressure pipeline monitoring device will be installed at the gas wellhead, and the corresponding pressure regulating device is matched, so as to prevent the occurrence of dangerous accidents.

[0003] Common pressure regulating device for pressure relief mainly includes spring type and pilot type, spring type pressure relief device realizes accurate pressure relief operation by mechanical control or electromagnetic control. Discharge pipeline and buffer tank are responsible for guiding the discharged gas to the safe area or temporarily storing to avoid direct discharge of gas into the environment. Emergency shut-off valve and pressure relief device are interlocked, which can cut off the gas source upstream in time when overpressure occurs. Ensure the safety and stability of pipeline system when facing abnormal pressure, and fully consider the requirements of rapid response and environmental protection. The top of mechanical pressure relief valve is provided with an adjusting handle, which can adjust the spring pressure in the pressure relief valve by rotating the adjusting handle, and change the pressure relief interval. However, the adjusting handle is exposed, and when maintaining the gas production pipeline, the handle may be rotated due to accidental touch, which affects the stable infusion of the gas production pipeline. UTILITY MODEL CONTENTS

[0004] In view of the above problems, the utility model provides a kind of gas production pipeline pressure regulating device to solve the shortcomings of the prior art.

[0005] To achieve the purpose of the utility model, the utility model is realized by the following technical scheme: a kind of gas production pipeline pressure regulating device, including pressure relief valve, the first pipe joint is equipped on one side of pressure relief valve, the second pipe joint is equipped on the other side of pressure relief valve, and the second pipe joint is connected with pressure relief tank;

[0006] The upper end of pressure relief valve is provided with pressure regulating seat, the upper end of pressure regulating seat is provided with pressure regulating screw for adjusting the pressure of valve piece, and the lower end of pressure regulating screw is screwed into pressure regulating seat and is connected with pressure regulating seat by screw thread;

[0007] The upper end of pressure regulating seat is provided with adjusting box, adjusting box is fixedly connected with pressure regulating seat, adjusting box covers the outside of pressure regulating screw, the outside of adjusting box is provided with rotating column, one end of rotating column is fixedly connected with self-locking transmission part arranged in adjusting box for controlling the rotation of pressure regulating screw, and the other end of rotating column is provided with storage handle.

[0008] Further improvement lies in that the self-locking transmission part comprises a nut seat, a rotating support, a worm wheel and a worm.

[0009] The nut seat is sleeved outside the pressure regulating screw rod and is threadedly connected with the pressure regulating screw rod.

[0010] The rotating support is sleeved outside the nut seat and is rotationally connected with the nut seat and is fixedly connected to the inner side of the adjusting box.

[0011] The worm wheel is sleeved outside the nut seat and is fixedly connected with the nut seat.

[0012] The worm is rotationally arranged in the adjusting box and is engaged with the worm wheel and is fixedly connected with the rotating column.

[0013] Further improvement lies in that the storage handle comprises a pulling groove arranged on the left and right sides of the rotating column, a pulling block arranged in the pulling groove, the pulling block is engaged with the pulling groove, one end of the pulling block is rotationally connected with a cylindrical pin arranged in the rotating column, and the other end of the pulling block is provided with a buckle structure matched with the rotating column.

[0014] Further improvement lies in that the buckle structure comprises a clamping pin fixedly connected to the outer side of the pulling block, and a pin groove matched with the clamping pin is arranged in the inner side of the pulling groove.

[0015] Further improvement lies in that the buckle structure comprises two magnet pieces, one of the magnet pieces is fixedly connected to the outer side of the pulling block, the other magnet piece is fixedly connected to the inner side of the pulling groove, and the magnetic pole directions of the two magnet pieces are opposite.

[0016] Further improvement lies in that the pressure relief storage tank comprises a high-pressure storage tank, the top of the high-pressure storage tank is provided with a storage tank inlet, the top of the high-pressure storage tank is provided with a storage tank outlet, the storage tank inlet is fixedly connected with the second pipe joint through a flange, the storage tank outlet is communicated with the first pipe joint through a return pipe, and a gas valve is arranged at the connection between the return pipe and the storage tank outlet.

[0017] Further improvement lies in that the adjusting box is provided with an end cover on the top, a plurality of fixing bolts are assembled on the end cover, the fixing bolts pass through the end cover and are threadedly connected with bolt holes arranged on the upper end of the adjusting box.

[0018] Compared with the prior art, the utility model has the advantages of:

[0019] The pressure relief valve is connected with the high-pressure storage tank, the overpressure gas is temporarily stored in the high-pressure storage tank, and the back injection pipeline is restored after the system pressure is recovered, so that the safety discharge is ensured when the pressure is over limited. When the pressure is regulated, the self-locking transmission can ensure that the pressure regulating screw rod does not loosen and overturn when the rotating column stops rotating, so that the pressure regulation safety is ensured, and the handle outside the rotating column adopts the storage type design, so that the rotating column is prevented from rotating due to the mistaken touch of external personnel when the handle is stored, and the use safety of the pressure regulating device is further ensured. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings needed to be used in the description of the embodiments will be briefly introduced. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 is the structural diagram of the high-pressure storage tank in the utility model.

[0022] Figure 2 is the structural diagram of the pressure relief valve in the utility model.

[0023] Figure 3 is the structural diagram of the adjusting box in the utility model Figure 2

[0024] Figure 4 is the structural diagram of the inside of the adjusting box in the utility model.

[0025] Among them: 1, pressure relief valve; 2, pressure regulating seat; 3, first pipe joint; 4, second pipe joint; 5, storage tank inlet; 6, high-pressure storage tank; 7, storage tank outlet; 8, air valve; 9, return pipe; 10, adjusting box; 11, pressure regulating screw; 12, nut seat; 13, rotating support; 14, worm; 15, worm; 16, rotating column; 17, slot; 18, block; 19, pin. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] According to Figure 1 , 2 , 3, 4, a gas recovery pipeline pressure regulating device is provided in the embodiments, which comprises a pressure relief valve 1, the pressure relief valve 1 is provided with a first pipe joint 3 on one side, the pressure relief valve 1 is provided with a second pipe joint 4 on the other side, and the second pipe joint 4 is connected to a pressure relief storage tank; the pressure relief valve 1 adopts a mechanical automatic regulating structure, and is designed in linkage with a valve core through a spring in the pressure relief valve 1 and the pressure regulating seat 2, so as to automatically relieve pressure when the pressure is over-limit, the pressure relief valve 1 is connected to a high-pressure storage tank, and the overpressure gas is temporarily stored through the high-pressure storage tank, and is injected back to the pipeline after the system pressure is restored, so as to ensure safe discharge when the pressure is over-limit. The pressure relief valve 1 and the pressure regulating seat 2 are common pressure relief valve structures, and specific details will not be described in detail. ​

[0028] The pressure relief valve 1 is provided with a pressure regulating seat 2 at the upper end, and the pressure regulating seat 2 is provided with a pressure regulating screw 11 for adjusting the pressure of the valve plate at the upper end. The pressure regulating screw 11 is screwed into the pressure regulating seat 2 and is in threaded connection with the pressure regulating seat 2 at the lower end.

[0029] Rotating the pressure regulating screw 11, the pressure regulating screw 11 will push the spring at the top of the valve core, so that the spring is retracted, the pressure of the valve core is adjusted, and the specific details of the valve core and the spring are not described in detail.

[0030] The pressure regulating seat 2 is provided with an adjusting box 10 at the upper end, and the adjusting box 10 is fixedly connected with the pressure regulating seat 2. The adjusting box 10 covers the outer side of the pressure regulating screw 11, and the outer side of the adjusting box 10 is provided with a rotating column 16. One end of the rotating column 16 is fixedly connected with a self-locking transmission member provided in the adjusting box 10 for controlling the rotation of the pressure regulating screw 11, and the other end of the rotating column 16 is provided with a storage type handle.

[0031] Rotating the rotating column 16, the rotating column 16 will control the rotation of the pressure regulating screw 11 through the self-locking transmission member. The pressure regulating screw 11 adjusts the pressure of the valve core in rotation. The self-locking transmission member can ensure that the pressure regulating screw 11 will not loosen and overturn when the rotating column 16 stops rotating, ensuring the safety of pressure regulation. At the same time, the handle on the outer side of the rotating column 16 for facilitating the rotation of the rotating column 16 is designed in a storage type. The handle can prevent external personnel from accidentally touching and causing the rotating column 16 to rotate when the handle is stored, and the safety of the gas pipeline is further guaranteed.

[0032] Regarding the self-locking transmission member:

[0033] The self-locking transmission member includes a nut seat 12, a rotating support 13, a worm wheel 14 and a worm 15.

[0034] The nut seat 12 is sleeved on the outer side of the pressure regulating screw 11, and the nut seat 12 is in threaded connection with the pressure regulating screw 11.

[0035] The rotating support 13 is sleeved on the outer side of the nut seat 12, and the rotating support 13 is in rotational connection with the nut seat 12. The rotating support 13 is fixedly connected to the inner side of the adjusting box 10.

[0036] The worm wheel 14 is sleeved on the outer side of the nut seat 12, and the worm wheel 14 is fixedly connected with the nut seat 12.

[0037] The worm 15 is rotatably arranged in the inner side of the adjusting box 10, and the worm 15 is in engagement with the worm wheel 14. The worm 15 is fixedly connected with the rotating column 16.

[0038] Rotating the rotating column 16, the rotating column 16 will drive the worm 15 to rotate, the worm 15 drives the worm wheel 14 to rotate through cooperation with the worm wheel 14, the worm wheel 14 is fixed with the nut seat 12, when the worm wheel 14 rotates, the nut seat 12 also rotates synchronously, finally, the nut seat 12 drives the pressure regulating screw 11 to rotate into the pressure regulating seat 2 or rotates outwards through cooperation with the pressure regulating screw 11. The rotating support 13 plays a supporting role on the nut seat 12, ensuring that the nut seat 12 does not displace in the up-down and left-right directions when rotating.

[0039] The storage handle includes a rotating slot 17 opened on the left and right sides of the rotating column 16, a rotating block 18 is arranged in the rotating slot 17, the rotating block 18 is matched with the rotating slot 17, one end of the rotating block 18 is rotatably connected with a cylindrical pin arranged in the rotating column 16, and the other end of the rotating block 18 is provided with a buckle structure matched and locked with the rotating column 16.

[0040] When the rotating block 18 is arranged in the rotating slot 17, the operator will not cause the rotating column 16 to rotate when accidentally touching the rotating column 16, thereby improving the operation safety.

[0041] In the preferred scheme, the buckle structure includes a clamping pin 19 fixedly connected to the outer side of the rotating block 18, and a pin slot matched with the clamping pin 19 is arranged on the inner side of the rotating slot 17. When the rotating block 18 is arranged in the rotating slot 17, the clamping pin 19 fixedly connected to the rotating block 18 is clamped into the pin slot arranged on the inner side of the rotating slot 17, and the rotating block 18 will not be separated from the rotating slot 17 in the idle state.

[0042] In another preferred scheme, the buckle structure includes two magnet pieces, one of which is fixedly connected to the outer side of the rotating block 18, and the other of which is fixedly connected to the inner side of the rotating slot 17. The magnetic pole directions of the two magnet pieces are opposite. When the rotating block 18 is arranged in the rotating slot 17, the magnet piece fixedly connected to the rotating block 18 is attracted to the magnet piece in the rotating slot 17, and the rotating block 18 will not be separated from the rotating slot 17 in the idle state.

[0043] Regarding the pressure relief storage tank:

[0044] The pressure relief storage tank includes a high-pressure storage tank 6, a storage tank inlet 5 arranged on the top of the high-pressure storage tank 6, and a storage tank outlet 7 arranged on the top of the high-pressure storage tank 6. The storage tank inlet 5 is fixedly connected with the second pipe joint 4 through a flange, the storage tank outlet 7 is communicated with the first pipe joint 3 through a return pipe 9, and a gas valve 8 is arranged at the connection position of the return pipe 9 and the storage tank outlet 7. A one-way valve is arranged at the connection position of the second pipe joint 4 and the storage tank inlet 5 and the connection position of the return pipe 9 and the first pipe joint 3. The overpressure gas is temporarily stored in the high-pressure storage tank 6, and after the system pressure is restored, the gas in the high-pressure storage tank 6 is injected back into the pipeline through the gas valve 8 and the return pipe 9, so as to ensure safe discharge when the pressure is out of limit. The connection positions of the components need to be well sealed to ensure that the gas will not leak and cause safety hazards.

[0045] For the convenience of adjusting the elements in the box 10, in the preferred embodiment, the top of the adjusting box 10 is provided with an end cover, and a plurality of fixing bolts are assembled on the end cover, which pass through the end cover and are screwed with bolt holes provided on the upper end of the adjusting box 10. When the end cover is removed, the fixing bolts on the end cover are unscrewed from the bolt holes on the upper end of the adjusting box 10.

[0046] The working principle of the present application is as follows:

[0047] The pressure relief valve 1 adopts a mechanical automatic adjusting structure, and is designed to be linked with the valve core through the spring in the pressure regulating seat 2, so as to automatically release pressure when the pressure is over-limit. The pressure relief valve 1 is connected with a high-pressure storage tank, and temporarily stores the overpressure gas through the high-pressure storage tank, and then returns to the pipeline when the system pressure is restored, so as to ensure safe discharge when the pressure is over-limit. The pressure relief valve 1 and the pressure regulating seat 2 are common pressure relief valve structures, and specific details will not be described in more detail. The rotating column 16 is controlled to rotate the pressure regulating screw 11 through the self-locking transmission member, the pressure regulating screw 11 adjusts the pressure of the valve core in rotation, and the self-locking transmission member can ensure that the pressure regulating screw 11 will not loosen and overturn when the rotating column 16 stops rotating, so as to ensure the safety of pressure regulation. Meanwhile, the handle on the outside of the rotating column 16 for facilitating the rotation of the rotating column 16 is designed to be stored, and the handle can prevent external personnel from accidentally touching the handle to cause the rotating column 16 to rotate when the handle is stored, so as to further ensure the safety of the gas recovery pipeline.

[0048] In the description of the present application, it should be noted that the positions or position relationships indicated by the terms "upper", "lower" and the like are based on the positions or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular position, be constructed and operated in a particular position, and therefore cannot be understood as a limitation on the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal connection of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] The above is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications of these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A kind of gas pipeline pressure regulating device, comprising pressure relief valve (1), the first pipe joint (3) is provided with on one side of the pressure relief valve (1), the second pipe joint (4) is provided with on the other side of the pressure relief valve (1), the second pipe joint (4) is connected pressure relief storage tank, it is characterized by: the upper end of the pressure relief valve (1) is equipped with pressure regulating seat (2), the upper end of the pressure regulating seat (2) is equipped with pressure regulating screw (11) for adjusting the pressure of valve piece, the lower end of the pressure regulating screw (11) is screwed into the pressure regulating seat (2) and is connected with the pressure regulating seat (2) threadedly; The upper end of the pressure regulating seat (2) is equipped with adjusting box (10), the adjusting box (10) is fixedly connected with the pressure regulating seat (2), the adjusting box (10) is covered outside the pressure regulating screw (11), the rotating column (16) is equipped outside the adjusting box (10), one end of the rotating column (16) is fixedly connected with self-locking transmission part for controlling the rotation of the pressure regulating screw (11) in the adjusting box (10), the other end of the rotating column (16) is equipped with storage handle.

2. A gas gathering pipeline pressure regulating device according to claim 1, wherein: The self-locking transmission part includes nut seat (12), rotating support (13), worm wheel (14) and worm (15); The nut seat (12) is sleeved outside the pressure regulating screw (11), and the nut seat (12) is threadedly connected with the pressure regulating screw (11); The rotating support (13) is sleeved outside the nut seat (12), and the rotating support (13) is rotatably connected with the nut seat (12), and the rotating support (13) is fixedly connected inside the adjusting box (10); The worm wheel (14) is sleeved outside the nut seat (12), and the worm wheel (14) is fixedly connected with the nut seat (12); The worm (15) is rotatably arranged inside the adjusting box (10), the worm (15) is engaged with the worm wheel (14), and the worm (15) is fixedly connected with the rotating column (16).

3. A gas gathering pipeline pressure regulating device according to claim 1, wherein: The storage handle includes the push slot (17) opened in the left and right sides of the rotating column (16), the push block (18) is arranged in the push slot (17), the push block (18) is matched with the push slot (17), one end of the push block (18) is rotatably connected with the cylindrical pin arranged in the rotating column (16), and the other end of the push block (18) is provided with the buckle structure matched with the rotating column (16) and locked.

4. A gas gathering pipeline pressure regulating device according to claim 3, wherein: The buckle structure includes the catch pin (19), the catch pin (19) is fixedly connected outside the push block (18), and the pin slot matched with the catch pin (19) is opened in the inside of the push slot (17).

5. A gas gathering pipeline pressure regulating device according to claim 3, wherein: The buckle structure includes two magnet pieces, one of the magnet pieces is fixedly connected outside the push block (18), the other magnet piece is fixedly connected inside the push slot (17), and the magnetic pole directions of the two magnet pieces are opposite.

6. A gas gathering pipeline pressure regulating device according to claim 1, wherein: The pressure relief tank comprises a high-pressure tank (6), the top of the high-pressure tank (6) is provided with a tank inlet (5), the top of the high-pressure tank (6) is provided with a tank outlet (7), the tank inlet (5) is fixedly connected with the second pipe joint (4) through a flange, the tank outlet (7) is communicated with the first pipe joint (3) through a backflow pipe (9), and the connection between the backflow pipe (9) and the tank outlet (7) is provided with an air valve (8).

7. A gas gathering pipeline pressure regulating device according to claim 1 wherein: The adjusting box (10) is provided with an end cover at the top, a plurality of fixing bolts are assembled on the end cover, the fixing bolts pass through the end cover and are screwed with bolt holes arranged on the upper end of the adjusting box (10).

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