Gas-liquid linkage ball valve

Abstract

The utility model belongs to the technical field of gas-liquid linkage valves, and discloses a gas-liquid linkage ball valve which comprises a ball valve body, a gas inlet pipe, a gas outlet pipe, a filtering assembly, a quick disassembly and assembly assembly and at least two isolation assemblies. The sealing piece ensures that no leakage is generated when gas and liquid flow, the mounting channel is formed in the gas inlet pipe in the radial direction, so that the filter screen can be detachably mounted through the mounting channel, and the filter assembly can be maintained without dismounting the whole ball valve; the quick dismounting and mounting assembly can quickly lock or release the sealing element, so that the operation of fixing and releasing the filter assembly is simplified, the filter screen can be simply, conveniently and quickly replaced or cleaned, the gas stopping time is effectively shortened, and the maintenance efficiency is improved; the isolation assembly can effectively and temporarily seal fluid flow on one side of the filter screen, oil splashing caused by residual pressure in the pipe when the filter screen is disassembled is prevented, and the operation safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas -liquid linkage valve technical field especially relates to a gas -liquid linkage ball valve. BACKGROUND

[0002] The gas-liquid linkage ball valve is a kind of high-performance control valve combined with pneumatic and hydraulic drive technology.It drives hydraulic system by compressed air, and then controls the opening and closing of the ball valve. This ball valve is usually used in high pressure, large diameter and fast opening and closing working conditions, such as petroleum, chemical industry, natural gas pipeline, etc., with the characteristics of strong driving force, fast opening and closing speed, stability and safety.

[0003] The filter screen is one of the key components of the gas-liquid linkage ball valve, mainly used for filtering impurities in hydraulic oil or gas source to avoid damage to the actuator and valve body due to pollutants. When the filter screen is blocked by impurities, it needs to be replaced in time to maintain the normal operation of the gas-liquid linkage ball valve. During the replacement process, the gas-liquid linkage ball valve needs to be treated with air stop. However, since the hydraulic system is usually in a high pressure state, even if the pressure source is closed, there may still be some residual pressure in the pipeline. If the residual pressure is not fully released, oil may splash when the filter screen is removed, which may cause safety hazards. In addition, the filter screen is usually located in the hydraulic pipeline or gas source pipeline, and needs to be disassembled during replacement. The disassembly and connection operation of the connecting parts is relatively complex, which will prolong the air stop time, affect the efficiency of the device, and increase the risk of oil or gas leakage when the new filter screen is installed if it is not properly reset. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of gas-liquid linkage ball valve, can be simply and quickly disassembled and installed filter screen, can effectively avoid the oil splash caused by residual pressure, reduce air stop time, improve the safety and working efficiency of gas-liquid linkage ball valve, and then ensure the stable operation of device.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The gas-liquid linkage ball valve includes a ball valve body, an air inlet pipe and an air outlet pipe, the air inlet pipe, the ball valve body and the air outlet pipe are connected in sequence, wherein the gas-liquid linkage ball valve further comprises:

[0007] A filter assembly includes a filter screen and a sealing element, the sealing element is fixed to the outer edge of the filter screen, and can be sealingly connected with the air inlet pipe, the air inlet pipe is provided with a mounting channel along its radial direction, and the filter screen can be detachably installed in the air inlet pipe through the mounting channel to filter impurities in the pipe;

[0008] A quick assembly and disassembly component is fixed to the outer surface of the air inlet pipe and located at one side of the filter assembly, and the quick assembly and disassembly component can quickly fix or release the sealing member.

[0009] At least two isolation components are arranged in the air inlet pipe in the axial direction of the air inlet pipe and are respectively located at two sides of the filter screen, and the isolation components can selectively isolate the fluid at two sides of the filter screen.

[0010] Further, the quick assembly and disassembly component comprises a fixed plate, a movable plate and an elastic limiting member, the fixed plate is fixedly arranged at one side of the sealing member, the movable plate is arranged between the fixed plate and the sealing member, and the elastic limiting member is arranged between the movable plate and the fixed plate in the axial direction of the air inlet pipe to form an elastic support structure, so that the movable plate always has a tendency to move towards the sealing member, one end of the elastic limiting member close to the sealing member is arranged in the movable plate and is fixedly connected with the movable plate, and the elastic limiting member can fix or release the sealing member under the drive of the movable plate.

[0011] Further, the quick assembly and disassembly component comprises a plurality of elastic limiting members, and the elastic limiting members are arranged at intervals in the circumferential direction of the sealing member.

[0012] Further, the elastic limiting member comprises a limiting rod and a spring, one end of the limiting rod close to the sealing member is arranged in the movable plate and is fixedly connected with the movable plate, a limiting hole corresponding to the position of the limiting rod is arranged on the sealing member, and the limiting rod can be inserted into the limiting hole; the spring is sleeved on the limiting rod and is located between the movable plate and the fixed plate, so that the movable plate always has a tendency to move towards the sealing member; and one end of the limiting rod close to the fixed plate is arranged in the fixed plate and is slidingly connected with the fixed plate.

[0013] Further, the quick assembly and disassembly component further comprises a handle, and the handle is arranged on the movable plate.

[0014] Further, one side of the filter screen facing the air inlet end of the air inlet pipe is provided with a dirt containing groove, and the dirt containing groove can contain the filtered impurities in the pipe.

[0015] Further, the isolation assembly comprises an isolation plate, a rotating member and a locking member, the isolation plate is arranged in the air inlet pipe and its outer edge is sealingly matched with the inner wall of the air inlet pipe, for isolating the fluid on both sides of the filter screen; one end of the rotating member is fixedly connected with the outer edge of the isolation plate, the other end of the rotating member is arranged in the air inlet pipe and extends to the outside of the air inlet pipe, the rotating member is sealingly matched with the air inlet pipe, the rotating member can drive the isolation plate to rotate around the radial direction to adjust the fluid isolation state in the air inlet pipe; the locking member is arranged on the rotating member, the locking member can lock the rotation of the rotating member to keep the position of the isolation plate unchanged.

[0016] Further, the rotating member comprises a rotating connecting rod and a rotating disc, one end of the rotating connecting rod is fixedly connected with the isolation plate, the other end of the rotating connecting rod is arranged in the air inlet pipe and extends to the outside of the air inlet pipe and is fixedly connected with the rotating disc, the rotating connecting rod is sealingly matched with the air inlet pipe, and the locking member can limit the rotation of the rotating disc.

[0017] Further, the locking member comprises a positioning disc and a positioning pin, the positioning pin is slidingly arranged in the rotating disc in the vertical direction, the positioning disc is arranged below the rotating disc and is fixedly connected with the air inlet pipe, a plurality of positioning holes are formed in the positioning disc, and the positioning pin can be selectively inserted into any one of the positioning holes to limit the rotation of the rotating disc.

[0018] Further, the filter assembly further comprises a handle, and the handle is arranged on the sealing member.

[0019] The utility model discloses beneficial effects:

[0020] The utility model provides a kind of gas-liquid linkage ball valve, including ball valve body, air inlet pipe, air outlet pipe, filter assembly, quick disassembly and assembly component and at least two insulation components, wherein filter assembly includes filter screen and sealing element, filter screen is used to filter the impurity in pipeline, prevents impurity from entering ball valve and influences ball valve work, keeps fluid clean, sealing element is fixed to the outer edge of filter screen, and is sealed with air inlet pipe Connection, ensure that gas-liquid flow will not produce leakage, by being radially provided with installation channel on air inlet pipe, make filter screen can be detachably installed by the installation channel, without disassembling entire ball valve, filter assembly can be maintained;By quick disassembly and assembly component is fixed to the outer surface of air inlet pipe and is close to filter assembly setting, can quickly lock or release sealing element, simplify the operation of fixed and release filter assembly, can conveniently and quickly replace or clean filter screen, without disassembling entire gas-liquid linkage ball valve structure, effectively shorten the gas-off time, improve maintenance efficiency;By at least two insulation components are arranged along the axial direction of air inlet pipe and are located at the two sides of filter screen respectively, insulation component can selectively isolate fluid on the two sides of filter screen, can effectively temporarily close the fluid flow on the side of filter screen, prevent oil splashing caused by residual pressure in pipe when filter screen is disassembled, effectively reduce the accident caused by improper pressure release, improve operation safety. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structure schematic diagram of gas-liquid linkage ball valve in the utility model;

[0022] Figure 2 It is the structure schematic diagram of filter assembly, insulation component and quick disassembly and assembly component in the utility model in air inlet pipe;

[0023] Figure 3 It is the structure schematic diagram of insulation component in the utility model.

[0024] In the drawing:

[0025] 100, ball valve body;200, air inlet pipe;300, air outlet pipe;

[0026] 1, filter assembly;11, filter screen;12, sealing element;13, handle;

[0027] 2, quick disassembly and assembly component;21, fixed plate;22, movable plate;23, elastic limiting piece;231, limiting rod;232, spring;24, handle;

[0028] 3, insulation component;31, insulation plate;32, rotating part;321, rotating link;322, rotating disc;33, locking element;331, positioning disc;332, positioning pin. DETAILED DESCRIPTION

[0029] The utility model will be described further in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0030] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0031] In the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "below" the second feature, which can include direct contact between the first and second features, or indirect contact between the first and second features through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0032] In the description of the embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, 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, therefore, it cannot be understood as a limitation of the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0033] Please refer to Figures 1 to 3The utility model provides a kind of gas-liquid linkage ball valve, can be simply and quickly disassembled and install filter screen 11, can effectively avoid the oil splash possibly caused by residual pressure, reduce gas time, improve the security and working efficiency of gas-liquid linkage ball valve, to ensure the stable operation of device further.The gas-liquid linkage ball valve, including ball valve body 100, inlet pipe 200, outlet pipe 300, filter assembly 1, quick disassembly and assembly component 2 and at least two insulation components 3, wherein inlet pipe 200, ball valve body 100 and outlet pipe 300 are sequentially connected, filter assembly 1 includes filter screen 11 and sealing element 12, sealing element 12 is fixed to the outer edge of filter screen 11, and can be sealed with inlet pipe 200 Connection, installation channel is opened along the radial direction of inlet pipe 200, filter screen 11 can be detachably installed in inlet pipe 200 through installation channel, for filtering the impurities in pipe;Quick disassembly and assembly component 2 is fixed to the outer surface of inlet pipe 200, and is located at one side of filter assembly 1, and quick disassembly and assembly component 2 can quickly fix or release sealing element 12;At least two insulation components 3 are spaced apart in the axial direction of inlet pipe 200 and are located on both sides of filter screen 11 in inlet pipe 200, and insulation component 3 selectively insulates the fluid on both sides of filter screen 11.

[0034] Filter assembly 1 includes filter screen 11 and sealing element 12, filter screen 11 is used to filter the impurities in pipeline, prevents impurities from entering ball valve to affect the work of ball valve, keeps fluid clean, sealing element 12 is fixed to the outer edge of filter screen 11, and is sealed with inlet pipe 200 Connection, ensure that there is no leakage when gas-liquid flows, by being radially provided with installation channel on inlet pipe 200, so that filter screen 11 can be detachably installed through the installation channel, without disassembling the whole ball valve, filter assembly 1 can be maintained;Quick disassembly and assembly component 2 is fixed to the outer surface of inlet pipe 200 and is arranged close to filter assembly 1, can quickly lock or release sealing element 12, simplify the operation of fixing and releasing filter assembly 1, can conveniently and quickly replace or clean filter screen 11, without disassembling the whole gas-liquid linkage ball valve structure, effectively shorten the gas time, improve maintenance efficiency;By spacing at least two insulation components 3 along the axial direction of inlet pipe 200, respectively located on both sides of filter screen 11, insulation component 3 selectively insulates the fluid on both sides of filter screen 11, can effectively temporarily close the fluid flow on both sides of filter screen 11, prevent oil splash caused by residual pressure in pipe when filter screen 11 is disassembled, effectively reduce the accident caused by improper pressure release, improve operation safety.

[0035] As Figure 2As shown, in order to realize the quick disassembly of the sealing member 12, in some embodiments, the quick disassembly assembly 2 comprises a fixed plate 21, a movable plate 22 and an elastic limiting member 23, the fixed plate 21 is fixed on one side of the sealing member 12, the movable plate 22 is arranged between the fixed plate 21 and the sealing member 12, and the elastic limiting member 23 is arranged between the movable plate 22 and the fixed plate 21 along the axis of the air inlet pipe 200 to form an elastic support structure, so that the movable plate 22 always maintains a tendency to move towards the sealing member 12, one end of the elastic limiting member 23 close to the sealing member 12 is arranged in the movable plate 22 and is fixedly connected therewith, and can fix or release the sealing member 12 under the drive of the movable plate 22; wherein by fixing the fixed plate 21 on one side of the sealing member 12, the movable plate 22 is arranged between the fixed plate 21 and the sealing member 12, and cooperates with the elastic limiting member 23, the operator only needs to move the movable plate 22 towards the fixed plate 21, compress the elastic limiting member 23, and then release the filter assembly 1 to replace it; when it is necessary to lock the filter assembly 1, since the elastic limiting member 23 forms an elastic support structure, the movable plate 22 always maintains a tendency to move towards the sealing member 12, therefore the operator only needs to release the movable plate 22, and the elastic limiting member 23 can lock the sealing member 12 of the filter assembly 1 to ensure that the sealing member 12 tightly fits the air inlet pipe 200 and prevents the sealing from loosening due to vibration or pressure fluctuation; the elastic limiting member 23 can ensure that the movable plate 22 is not easily released when it is not actively unlocked, avoid the sealing assembly from accidentally falling off due to external force or vibration, enhance the system safety, the overall structure of the quick disassembly assembly 2 is simple, occupies small space, and is suitable for various gas-liquid linkage ball valve systems, especially in space-limited or high-frequency maintenance occasions.

[0036] In order to enhance the stability of the quick disassembly assembly 2, in some embodiments, the quick disassembly assembly 2 comprises a plurality of elastic limiting members 23, and the plurality of elastic limiting members 23 are arranged in a circumferential direction of the sealing member 12; wherein by arranging the plurality of elastic limiting members 23 in the circumferential direction of the sealing member 12, a plurality of support points are formed to enhance the fitting of the sealing member 12 and avoid deformation or loosening of the sealing member 12 due to uneven force on a single point. It can be understood that the plurality of elastic limiting members 23 are evenly arranged in the circumferential direction of the sealing member 12, which can effectively ensure that the sealing member 12 is evenly stressed.

[0037] Specifically, the elastic limiting piece 23 comprises a limiting rod 231 and a spring 232. The limiting rod 231 is arranged in the movable plate 22 at one end close to the sealing piece 12 and is fixedly connected with the movable plate 22. The sealing piece 12 is provided with a limiting hole corresponding to the position of the limiting rod 231, and the limiting rod 231 can be inserted into the limiting hole. The spring 232 is sleeved on the limiting rod 231 and located between the movable plate 22 and the fixed plate 21, so that the movable plate 22 always maintains a tendency to move towards the sealing piece 12. The limiting rod 231 is arranged in the fixed plate 21 at the other end close to the fixed plate 21 and is slidably connected with the fixed plate 21. The limiting rod 231 can be inserted into the limiting hole on the sealing piece 12, so as to realize accurate alignment and stable fixation of the sealing piece 12 and the quick disassembly and assembly component 2, and prevent the sealing piece 12 from loosening due to vibration or fluid impact. The spring 232 provides continuous elastic support, so that the movable plate 22 always maintains a tendency to move towards the sealing piece 12, and ensures stable sealing state. The limiting rod 231 is arranged in the fixed plate 21 at the other end close to the fixed plate 21 and is slidably connected with the fixed plate 21. When the filter assembly 1 needs to be replaced, the movable plate 22 can be directly pulled away from the sealing piece 12, so that the limiting rod 231 is separated from the limiting hole, and sufficient expansion space is provided for disassembly and assembly of the sealing piece 12, thereby realizing quick disassembly and assembly, simplifying the maintenance process and improving work efficiency.

[0038] In order to facilitate pulling of the movable plate 22, in some embodiments, the quick disassembly and assembly component 2 further comprises a handle 24 arranged on the movable plate 22. An operator can directly hold the handle 24, facilitate force application, and move the movable plate 22 in a set direction, so as to more easily complete disassembly and assembly of the filter assembly 1.

[0039] In order to reduce the maintenance frequency, in some embodiments, one side of the filter screen 11 facing the air inlet end of the air inlet pipe 200 is provided with a dirt container capable of containing filtered pipe impurities. By storing the impurities in the dirt container instead of directly accumulating on the surface of the filter screen 11, the clogging of the filter screen 11 can be delayed, the cleaning frequency can be reduced, and the downtime maintenance time can be reduced.

[0040] As Figure 3As shown, in order to precisely control the fluid isolation state, in some embodiments, the isolation component 3 includes an isolation plate 31, a rotating member 32, and a locking member 33. The isolation plate 31 is disposed inside the air inlet pipe 200, and its outer edge is sealed and matched with the inner wall of the air inlet pipe 200 to isolate the fluid on both sides of the filter screen 11. One end of the rotating member 32 is fixedly connected to the outer edge of the isolation plate 31, and the other end of the rotating member 32 passes through the air inlet pipe 200 and extends to its outside. The rotating member 32 is sealed and matched with the air inlet pipe 200. The rotating member 32 can drive the isolation plate 31 to rotate radially around it to adjust the fluid isolation state inside the air inlet pipe 200. The locking member 33 is disposed on the rotating member 32 and can lock the rotation of the rotating member 32 to keep the position of the isolation plate 31 unchanged. The isolation plate 31 is sealed and matched with the inner wall of the air inlet pipe 200 to isolate the fluid on both sides of the filter screen 11. The inner wall of the air inlet pipe 200 is sealed to completely block or partially regulate the fluid on both sides of the filter screen 11. The rotating part 32 is connected to the isolation plate 31 and extends to the outside of the air inlet pipe 200. The operator can directly rotate the rotating part 32 from the outside to adjust the isolation state of the isolation plate 31. Under normal working conditions, the isolation plate 31 remains open, allowing the fluid to pass through smoothly. When the filter assembly 1 needs to be replaced, the isolation plate 31 can be rotated to isolate both sides of the filter assembly 1, preventing oil splashing caused by residual pressure in the pipe when the filter screen 11 is disassembled. The locking part 33 can fix the rotating part 32, thereby keeping the isolation plate 31 in the set position and preventing position displacement due to fluid pressure or vibration. The isolation assembly 3 can operate stably for a long time, ensuring the safety and sealing of the gas-liquid linkage ball valve under different working conditions.

[0041] like Figure 1 As shown, specifically, the rotating component 32 includes a rotating connecting rod 321 and a rotating disk 322. One end of the rotating connecting rod 321 is fixedly connected to the insulating plate 31, and the other end of the rotating connecting rod 321 passes through the air intake pipe 200 and extends to its outside, where it is fixedly connected to the rotating disk 322. The rotating connecting rod 321 and the air intake pipe 200 are sealed together, and the locking component 33 can restrict the rotation of the rotating disk 322. By fixing one end of the rotating connecting rod 321 to the insulating plate 31 and the other end to the rotating disk 322, the rotation is ensured to be smooth and uniform, allowing the insulating plate 31 to rotate precisely radially within the air intake pipe 200, thereby adjusting the fluid isolation state through rotation. The sealed cooperation between the rotating connecting rod 321 and the air intake pipe 200 effectively prevents gas or fluid leakage and improves the sealing performance.

[0042] In other embodiments, the rotating disk 322 is provided with multiple rotating handles, which are evenly spaced around the outer edge of the disk. The operator can select one or more handles to operate as needed, thereby providing more gripping points and making the operation more flexible and comfortable.

[0043] More specifically, the locking member 33 comprises a positioning disc 331 and a positioning pin 332, the positioning pin 332 is slidably arranged in the rotating disc 322 along the vertical direction, and the positioning disc 331 is arranged below the rotating disc 322 and is fixedly connected with the air inlet pipe 200, a plurality of positioning holes are formed in the positioning disc 331, and the positioning pin 332 can be selectively inserted into any one of the positioning holes to limit the rotation of the rotating disc 322; wherein, by sliding the positioning pin 332 in the rotating disc 322 along the vertical direction, the positioning pin 332 can be flexibly moved in the vertical direction, which facilitates the operator to select the appropriate position for locking according to the needs; the positioning disc 331 is fixedly connected with the air inlet pipe 200, which ensures the stable position of the positioning disc 331 and can be firmly matched with the rotating disc 322; the plurality of positioning holes on the positioning disc 331 provide a plurality of locking points, the positioning pin 332 can be inserted into any one of the positioning holes, the rotation angle of the rotating disc 322 can be accurately controlled, and the position of the isolation plate 31 can be ensured to always remain at the required accurate position, thereby providing stable fluid isolation.

[0044] In order to improve the disassembly efficiency of the filter assembly 1, in some embodiments, the filter assembly 1 further comprises a handle 13 arranged on the sealing member 12; wherein, the operator can directly lift the filter assembly 1 through the handle 13 when disassembling the filter assembly 1, the handle 13 provides a better gripping point, so that the operator can reduce the hand fatigue when disassembling or installing the filter assembly 1, and the operation comfort is improved.

[0045] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A gas-liquid linkage ball valve, comprising a ball valve body (100), an inlet gas pipe (200) and an outlet gas pipe (300), the inlet gas pipe (200), the ball valve body (100) and the outlet gas pipe (300) being connected in sequence, characterized in that, The gas-liquid linkage ball valve further comprises: A filter assembly (1) comprising a filter screen (11) and a sealing member (12) fixed to the outer edge of the filter screen (11) and capable of being sealingly connected with the air inlet pipe (200), the air inlet pipe (200) being provided with a mounting channel along its radial direction, the filter screen (11) being detachably mounted in the air inlet pipe (200) through the mounting channel for filtering impurities in the pipe; A quick disassembly and assembly assembly (2) fixed to the outer surface of the air inlet pipe (200) and located on one side of the filter assembly (1), the quick disassembly and assembly assembly (2) being capable of quickly fixing or releasing the sealing member (12); At least two insulation assemblies (3) spaced apart along the axial direction of the air inlet pipe (200) and located on both sides of the filter screen (11) in the air inlet pipe (200), the insulation assemblies (3) being capable of selectively insulating the fluid on both sides of the filter screen (11).

2. The gas-hydraulic pilot ball valve according to claim 1, characterized in that The quick disassembly and assembly assembly (2) comprises a fixed plate (21), a movable plate (22) and an elastic limiting member (23), the fixed plate (21) being fixedly arranged on one side of the sealing member (12), the movable plate (22) being arranged between the fixed plate (21) and the sealing member (12), and the elastic limiting member (23) being arranged between the movable plate (22) and the fixed plate (21) along the axial direction of the air inlet pipe (200) to form an elastic support structure so that the movable plate (22) always tends to move towards the sealing member (12), one end of the elastic limiting member (23) close to the sealing member (12) being arranged in the movable plate (22) and fixedly connected therewith and capable of fixing or releasing the sealing member (12) under the drive of the movable plate (22).

3. The air operated poppet valve according to claim 2, wherein The quick disassembly and assembly assembly (2) comprises a plurality of elastic limiting members (23) arranged in a spaced apart manner along the circumference of the sealing member (12).

4. The air operated poppet valve according to claim 3, wherein The elastic limiting member (23) comprises a limiting rod (231) and a spring (232), one end of the limiting rod (231) close to the sealing member (12) being arranged in the movable plate (22) and fixedly connected with the movable plate (22), a limiting hole corresponding in position to the limiting rod (231) being formed in the sealing member (12), and the limiting rod (231) being capable of being inserted into the limiting hole; the spring (232) is sleeved on the limiting rod (231) and located between the movable plate (22) and the fixed plate (21) so that the movable plate (22) always tends to move towards the sealing member (12); and one end of the limiting rod (231) close to the fixed plate (21) is arranged in the fixed plate (21) and slidably connected therewith.

5. The air operated poppet valve according to claim 4, wherein The quick disassembly and assembly assembly (2) further comprises a handle (24) arranged on the movable plate (22).

6. The air operated poppet valve of claim 1, wherein, The filter screen (11) is provided with a dirt container on the side facing the air inlet end of the air inlet pipe (200), which can contain the filtered impurities in the pipe.

7. The air operated poppet valve of claim 1, wherein, The isolation assembly (3) comprises an isolation plate (31), a rotating member (32) and a locking member (33). The isolation plate (31) is arranged in the air inlet pipe (200) and its outer edge is sealingly matched with the inner wall of the air inlet pipe (200) to isolate the fluid on both sides of the filter screen (11). One end of the rotating member (32) is fixedly connected with the outer edge of the isolation plate (31), and the other end of the rotating member (32) is arranged in the air inlet pipe (200) and extends to the outside of the air inlet pipe (200). The rotating member (32) is sealingly matched with the air inlet pipe (200) and can drive the isolation plate (31) to rotate radially to adjust the fluid isolation state in the air inlet pipe (200). The locking member (33) is arranged on the rotating member (32) and can lock the rotation of the rotating member (32) to keep the position of the isolation plate (31) unchanged.

8. The air operated poppet valve according to claim 7, wherein The rotating member (32) comprises a rotating connecting rod (321) and a rotating disc (322). One end of the rotating connecting rod (321) is fixedly connected with the isolation plate (31), and the other end of the rotating connecting rod (321) is arranged in the air inlet pipe (200) and extends to the outside of the air inlet pipe (200) and is fixedly connected with the rotating disc (322). The rotating connecting rod (321) is sealingly matched with the air inlet pipe (200), and the locking member (33) can limit the rotation of the rotating disc (322).

9. The air operated poppet valve according to claim 8, wherein, The locking member (33) comprises a positioning disc (331) and a positioning pin (332). The positioning pin (332) is slidingly arranged in the rotating disc (322) in the vertical direction. The positioning disc (331) is arranged below the rotating disc (322) and is fixedly connected with the air inlet pipe (200). A plurality of positioning holes are formed in the positioning disc (331), and the positioning pin (332) can be selectively inserted into any one of the positioning holes to limit the rotation of the rotating disc (322).

10. The air operated globe valve according to any one of claims 1-9, wherein, The filter assembly (1) further comprises a handle (13) arranged on the sealing member (12).

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