Manual and pneumatic dual-purpose control valve

Abstract

The utility model relates to a manual and pneumatic dual-purpose control valve, and relates to the field of fire fighting equipment. According to the manual and pneumatic dual-purpose control valve, a first cavity and a first piston are arranged in a valve body, and an air inlet and an air outlet are formed in the first cavity; a second cavity is formed in the air cylinder, and a second piston is arranged in the second cavity in a sliding mode; one end of the pressing arm is rotationally connected with the valve body, a limiting groove is formed in the other end of the pressing arm, and the other end of the first piston extends out of the valve body and abuts against the bottom wall of the pressing arm; one end of the rotating arm is rotatably connected with the valve body through a rotating shaft, and the other end abuts against the second piston. One end of the rotating shaft is fixed to the rotating arm and connected with the limiting groove in a limiting mode, and a handle is fixed to the rotating shaft. The control valve is of a pressing arm type structure, does not need to replace any part after being started, and can be repeatedly used; meanwhile, the control valve has a manual operation mode and a pneumatic operation mode and can be quickly opened, so that the fire extinguishing agent can be quickly released to a protection area.

Description

Technical Field

[0001] The utility model relates to the field of fire-fighting equipment, and particularly to a control valve that can be used both manually and pneumatically. Background Art

[0002] The high-pressure gas system refers to a system in which the fire extinguishing agent is usually stored in a pressure vessel in a high-pressure gas state, and enters the pipe network after decompression during fire extinguishing, and finally is sprayed to the protected area through a nozzle for fire extinguishing. This gas fire extinguishing system is mainly applied to computer rooms, important libraries and archives, etc. Among them, the control valve of the high-pressure gas fire extinguishing system is a cut-off valve installed on the fire extinguishing pipeline to select the release area of the fire extinguishing agent.

[0003] After research by the inventor, it is found that most of the current control valves applicable to high-pressure gas fire extinguishing systems adopt electric valves, which are prone to damage and the replacement process is relatively troublesome. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a control valve that can be used both manually and pneumatically, which does not need to replace any components, can be used repeatedly, and has both a manual operation mode and a pneumatic operation mode.

[0005] The embodiments of the utility model are implemented as follows:

[0006] The utility model provides a control valve, which includes a valve body, a cylinder, a pressure arm and a rotating arm; a first cavity and a first piston are arranged in the valve body, an air inlet and an air outlet are arranged on the first cavity, and one end of the first piston is slidably arranged in the first cavity and is used to close or open the air inlet; the cylinder is connected with the valve body, a second cavity is arranged in the cylinder, and a second piston is slidably arranged in the second cavity; one end of the pressure arm is rotatably connected with the valve body, a limiting groove is arranged at the other end of the pressure arm, and the other end of the first piston extends out of the valve body and abuts against the bottom wall of the pressure arm; one end of the rotating arm is rotatably connected with the valve body through a rotating shaft, and the other end abuts against the second piston; one end of the rotating shaft is fixed to the rotating arm, one end of the rotating shaft is limit-connected with the limiting groove, and a handle is fixed on the rotating shaft.

[0007] Optionally, the control valve further includes a first elastic member, one end of the first elastic member is connected with the valve body through a fixing member, and the other end of the first elastic member is connected with the rotating arm.

[0008] Optionally, the control valve further includes a second elastic member, the second elastic member is fixed to the valve body relative to the pressure arm, and the second elastic member abuts against the bottom of the other end of the pressure arm.

[0009] Optionally, one end of the rotating shaft is provided with an arc surface, and the arc surface is in limiting connection with the limiting groove.

[0010] Optionally, the pressing arm is provided with an opening relative to the first piston, a sliding column is sleeved in the opening, and the bottom of the sliding column extends out of the opening;

[0011] The end face of the other end of the first piston abuts against the lower bottom surface of the sliding column.

[0012] Optionally, the valve body includes a first body and a second body. The first body is provided with a first fitting cavity, an air inlet and an air outlet communicated with the first fitting cavity, and the second body is provided with a second fitting cavity;

[0013] The second body is sleeved in the first fitting cavity, and the first fitting cavity and the second fitting cavity form the first cavity.

[0014] Optionally, the first body and the second body are sealed and connected through a sealing member.

[0015] Optionally, one end of the bottom of the first piston is provided with a first limiting step, and the first limiting step abuts against the inner wall of the first body to close or communicate the air inlet;

[0016] One end of the top of the first piston is provided with a second limiting step, and the second limiting step is in sealed connection and sliding connection with the inner wall of the second body.

[0017] Optionally, a bushing is sleeved on the second limiting step. One end of the bushing is in sealed connection with the second limiting step, and the other end of the bushing is in sealed connection and sliding connection with the inner wall of the second body.

[0018] Optionally, the air cylinder is arranged on the first body;

[0019] The top of the second body is provided with an installation cavity, the pressing arm is arranged in the installation cavity, and one end of the pressing arm is rotatably connected with the second body through a rotating member;

[0020] The rotating arm is rotatably connected with the second body through a rotating member.

[0021] The beneficial effects of the embodiments of the present invention are as follows:

[0022] The hand-air dual-use control valve proposed by the present invention has a pressing arm structure. After startup, no components need to be replaced and it can be used repeatedly; at the same time, the control valve has a manual operation mode and a pneumatic operation mode, and can be quickly opened so that the fire extinguishing agent can be quickly released into the protection area. Description of the Drawings

[0023] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following accompanying drawings only show some embodiments of the present utility model and should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related accompanying drawings can also be obtained based on these drawings.

[0024] Figure 1 Structural schematic diagram of the control valve for the embodiment of the present utility model;

[0025] Figure 2 Partial cross-sectional view of the control valve for the embodiment of the present utility model;

[0026] Figure 3 Partial schematic diagram of the first piston and the pressing arm for the embodiment of the present utility model;

[0027] Figure 4 Top view of the control valve for the embodiment of the present utility model;

[0028] Figure 5 Schematic diagram of the control valve for the embodiment of the present utility model in the closed state;

[0029] Figure 6 Schematic diagram of the control valve for the embodiment of the present utility model in the open state.

[0030] Icons: 010 - Control valve; 100 - Valve body; 101 - First cavity; 102 - Air inlet; 103 - Air outlet; 110 - First body; 111 - First mating cavity; 120 - Second body; 121 - Second mating cavity; 123 - Installation cavity; 130 - First piston; 131 - First cylinder; 132 - Second cylinder; 133 - First limiting step; 134 - Second limiting step; 135 - Bushing; 136 - Air passage; 200 - Pressing arm; 201 - Limiting groove; 210 - Slide post; 220 - Rotating part; 230 - Second elastic member; 300 - Rotating arm; 310 - First elastic member; 311 - Fixing part; 400 - Rotating shaft; 410 - Handle; 420 - Arc surface; 500 - Cylinder; 501 - Second cavity; 510 - Cylinder body; 520 - Pressure cap; 530 - Second piston; 540 - Limiting piece; 600 - Sealing member. Detailed implementation manners

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. The components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0033] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0034] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product of the present utility model is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, and does 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 construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0035] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0036] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] The present utility model provides a control valve 010 that can be used both pneumatically and manually, which is used on the pipeline of a high-pressure gas fire extinguishing system and has the functions of closing and releasing the fire extinguishing agent circulation pipeline; wherein, the control valve 010 can be opened quickly through pneumatic opening and manual opening, so that the fire extinguishing agent can be quickly released into the protected area.

[0038] Please refer to Figure 1 , in this embodiment, a control valve 010 that can be used both pneumatically and manually is provided, which includes a valve body 100, a cylinder 500, a pressure arm 200 and a rotating arm 300; a first cavity 101 and a first piston 130 are arranged in the valve body 100, an air inlet 102 and an air outlet 103 are arranged on the first cavity 101, and one end of the first piston 130 is slidably arranged in the first cavity 101 and is used to close or open the air inlet 102; the cylinder 500 is connected to the valve body 100, a second cavity 501 is arranged in the cylinder 500, and a second piston 530 is slidably arranged in the second cavity 501; one end of the pressure arm 200 is rotatably connected to the valve body 100, a limiting groove 201 is arranged at the other end of the pressure arm 200, and the other end of the first piston 130 extends out of the valve body 100 and abuts against the bottom wall of the pressure arm 200; one end of the rotating arm 300 is rotatably connected to the valve body 100 through a rotating shaft 400, and the other end abuts against the second piston 530; one end of the rotating shaft 400 is fixed to the rotating arm 300, one end of the rotating shaft 400 is connected to the limiting groove 201 in a limiting manner, and a handle 410 is fixed on the rotating shaft 400.

[0039] It can be understood that the handle 410, the rotating shaft 400, the pressure arm 200 and the valve body 100 can realize manual opening of the control valve. By controlling the rotation of the rotating shaft 400 through the handle 410, the limiting of the limiting groove 201 of the pressure arm 200 by the rotating shaft 400 is released, and the pressure arm 200 further releases the limiting of the first piston 130. When the fire extinguishing agent enters from the air inlet 102, it pushes the first piston 130, the air inlet 102 is opened, and the fire extinguishing agent can quickly discharge from the air outlet 103 and can be quickly released into the protected area through the pipeline.

[0040] The rotating arm 300, the pressure arm 200, the cylinder 500 and the valve body 100 can realize pneumatic opening of the control valve. When the cylinder 500 is started, the gas pushes the second piston 530, the second piston 530 pushes open the rotating arm 300, the rotating arm 300 rotates to drive the rotating shaft 400 to release the limiting of the pressure arm 200, release the pressure arm 200, and the pressure arm 200 further releases the limiting of the first piston 130. When the fire extinguishing agent enters from the air inlet 102, it pushes the first piston 130, the air inlet 102 is opened, and the fire extinguishing agent can quickly discharge from the air outlet 103 and can be quickly released into the protected area through the pipeline.

[0041] Please refer to Figures 1-4 , in this embodiment, the control valve 010 includes a valve body 100.

[0042] Specifically, a first cavity 101 and a first piston 130 are provided inside the valve body 100. An air inlet 102 and an air outlet 103 are provided on the first cavity 101. One end of the first piston 130 is slidably disposed inside the first cavity 101 and is used to close or open the air inlet 102.

[0043] In this embodiment, please refer to Figure 1 , the valve body 100 includes a first body 110 and a second body 120.

[0044] Specifically, please refer to Figure 1 , the first body 110 is provided with a first mating cavity 111, an air inlet 102 and an air outlet 103 communicating with the first mating cavity 111. The first mating cavity 111 has a T-shaped structure and has three openings. One is the air inlet 102, one is the air outlet 103, and the other is a mounting port for connecting with the second body 120. Among them, the air inlet 102 and the air outlet 103 are vertically arranged, and the air inlet 102 is arranged along the movement direction of the first piston 130 and is arranged opposite to the mounting port.

[0045] Specifically, please refer to Figure 1 , the bottom of the second body 120 is provided with a second mating cavity 121, and the second mating cavity 121 communicates with the mounting cavity 123, so that the first piston 130 can abut against the bottom wall of the pressing arm 200 through the second mating cavity 121; the top of the second body 120 is provided with a mounting cavity 123, the pressing arm 200 is disposed inside the mounting cavity 123, and one end of the pressing arm 200 is rotatably connected to the second body 120 through a rotating member 220; the rotating arm 300 is rotatably connected to the second body 120 through the rotating member 220.

[0046] Among them, the rotating member 220 can be a cylindrical shaft.

[0047] Among them, please refer to Figure 1 , the outer wall of the second body 120 is provided with a mounting limiting portion. The bottom of the second body 120 is sleeved inside the first mating cavity 111 of the first body 110, and the first mating cavity 111 and the second mating cavity 121 form the first cavity 101; at the same time, the mounting limiting portion of the second body 120 and the first body 110 are fixed by an internal hexagon socket head screw.

[0048] Specifically, the second body 120 is sleeved inside the first mating cavity 111 of the first body 110, and the outer wall of the second body 120 and the inner wall surface of the first mating cavity 111 are hermetically connected by two sealing members 600 arranged at intervals.

[0049] In this embodiment, please refer to Figure 1, a first piston 130 is slidably disposed in a first cavity 101 of the valve body 100; the first piston 130 includes an integral first cylinder 131 and a second cylinder 132. The first cylinder 131 is located at the top of the second cylinder 132, and the diameter of the first cylinder 131 is smaller than that of the second cylinder 132.

[0050] Wherein, the first cylinder 131 penetrates through a second fitting cavity 121 of the second body 120 and is hermetically and slidably connected to the second body 120 through a seal 600.

[0051] Wherein, an annular limiting block is provided at the bottom of the second cylinder 132. The bottom surface of the annular limiting block forms a first limiting step 133, and the first limiting step 133 abuts against the inner wall of the first body 110 to close or communicate with the air inlet 102. A second limiting step 134 is provided at the top of the second cylinder 132, and the second limiting step 134 is hermetically and slidably connected to the inner wall of the second body 120.

[0052] Wherein, an air passage 136 communicating the first fitting cavity 111 and the second fitting cavity 121 is provided on the second cylinder 132, so that the first piston 130 can slide normally.

[0053] Optionally, a bushing 135 is sleeved on the second limiting step 134. One end of the bushing 135 is hermetically connected to the second limiting step 134 through a seal 600. The other end of the bushing 135 is slidably connected to the inner wall of the second fitting cavity 121 of the second body 120 and is hermetically connected through a seal 600.

[0054] Please refer to Figures 1-4 , in this embodiment, the control valve 010 includes a pressure arm 200.

[0055] In this embodiment, please refer to Figure 1 , the pressure arm 200 is disposed in the installation cavity 123. One end of the pressure arm 200 is rotatably connected to the second body 120 through a rotating member 220. A limiting groove 201 is provided at the other end of the pressure arm 200. The other end of the first piston 130 extends out of the valve body 100 and abuts against the bottom wall of the pressure arm 200.

[0056] It can be understood that, please refer to Figures 5-6 , when the limit on the pressure arm 200 is released by pneumatic control or manual control of the rotating arm 300, and the limit on the first piston 130 is further released by the pressure arm 200: the fire extinguishing agent enters from the air inlet 102 and pushes the first piston 130 to move upward along the first cavity 101. The first piston 130 moves upward and pushes the pressure arm 200 to rotate; then the air inlet 102 is communicated with the air outlet 103, and the fire extinguishing agent can be quickly supplied from the air outlet 103.

[0057] Optionally, an opening is provided at the position of the middle part of the pressing arm 200 relative to the first piston 130. A sliding column 210 is sleeved in the opening, and the bottom of the sliding column 210 extends out of the opening; the top surface of the first column 131 of the first piston 130 abuts against the bottom surface of the sliding column 210. It can be understood that the bottom of the sliding column 210 extends out of the opening so that the pressing arm 200 and the first piston 130 can achieve effective abutment and realize limited closing of the air inlet 102.

[0058] In this embodiment, please refer to Figure 3 , the control valve 010 further includes a second elastic member 230. The second elastic member 230 is fixed to the valve body 100 relative to the pressing arm 200, and the second elastic member 230 abuts against the bottom of the other end of the pressing arm 200. It can be understood that the second elastic member 230 can assist the pressing arm 200 to quickly bounce open, thereby realizing quick opening of the valve; wherein, the second elastic member 230 can be an elastic sheet or a spring.

[0059] Please refer to Figures 1-4 , in this embodiment, the control valve 010 includes a swing arm 300.

[0060] In this embodiment, one end of the swing arm 300 is rotatably connected to the valve body 100 through a rotating shaft 400, and the other end abuts against the second piston 530; one end of the rotating shaft 400 is fixed to the swing arm 300, one end of the rotating shaft 400 is connected to the limiting groove 201 in a limiting manner, and a handle 410 is fixed on the rotating shaft 400.

[0061] Optionally, please refer to Figures 3-4 , the rotating shaft 400 is a columnar structure, and one end of the rotating shaft 400 is a columnar structure with a semi-circular cross-section, so that an arc surface 420 is formed at one end of the rotating shaft 400. The arc surface 420 is connected to the limiting groove 201 in a limiting manner, and the orientation of the arc surface 420 is set away from the setting direction of the limiting groove 201. Among them, with the rotating shaft 400 arranged in this way, it can be avoided that the rotating shaft 400 and the limiting groove 201 interfere with each other during rotation, so that the pressing arm 200 cannot bounce open.

[0062] Among them, a handle 410 is also fixed on the rotating shaft 400, and the handle 410 is used for manual operation.

[0063] In this embodiment, please refer to Figure 2 , the swing arm 300 is an integrally formed first rod body and second rod body, the first rod body and the second rod body are arranged at an angle, the first rod body is sleeved and fixed with the rotating shaft 400, and the second rod body abuts against the second piston 530.

[0064] In this embodiment, the control valve 010 further includes a first elastic member 310. One end of the first elastic member 310 is connected to the valve body 100 through a fixing member 311, and the other end of the first elastic member 310 is connected to the swing arm 300.

[0065] Specifically, the first elastic member 310 is sleeved on the fixing member 311 and fixed by a shaft retaining ring. One end of the first elastic member 310 is fixed to the second body 120, and the other end of the first elastic member 310 is hooked to the swing arm 300.

[0066] Wherein, in the normal state, the first elastic member 310 drives the swing arm 300 to return by elastic force, or avoids the interference between the rotating shaft 400 and the pressing arm 200 caused by excessive rotation of the rotating shaft 400.

[0067] Wherein, the fixing member 311 can be a positioning shaft, and the first elastic member 310 can be a spring.

[0068] Please refer to Figure 2 , in this embodiment, the control valve 010 includes a cylinder 500.

[0069] In this embodiment, the cylinder 500 is connected and fixed to the second body 120 of the valve body 100. A second cavity 501 is provided in the cylinder 500, and a second piston 530 is slidably arranged in the second cavity 501. The second piston 530 can extend out of the second cavity 501 and abut against the swing arm 300.

[0070] In this embodiment, please refer to Figure 2 The cylinder 500 includes a sleeved cylinder body 510 and a compression cap 520. An air vent cavity is provided inside the compression cap 520, and the air vent cavity is communicated with the second cavity 501. A sealing member 600 is provided between the cylinder body 510 and the compression cap 520; a second piston 530 is slidably arranged in the second cavity 501, and one end of the second piston 530 extends out of the second cavity 501 and abuts against the swing arm 300.

[0071] Wherein, the cylinder body 510 is connected and fixed to the second body 120 by bolts, and a limiting piece 540 is also fixed to the bottom of the cylinder body 510.

[0072] It can be understood that when the cylinder 500 is started and gas is introduced into the air vent cavity, the gas pushes the second piston 530 to move along the second cavity 501. The second piston 530 pushes the swing arm 300 to rotate, and the rotation of the swing arm 300 drives the rotating shaft 400 to rotate. The rotating shaft 400 releases the limit on the pressing arm 200, and the pressing arm 200 further releases the limit on the first piston 130. When the fire extinguishing agent enters from the air inlet 102, it pushes the first piston 130, the air inlet 102 is opened, and the fire extinguishing agent can quickly discharge from the air outlet 103 and can be quickly released to the protected area through the pipeline.

[0073] In this embodiment, the sealing member 600 can be an O-ring.

[0074] In this embodiment, the main components of the control valve 010 are made of stainless steel, which is durable. Among them, the high-strength design of the control valve 010 meets the overpressure test up to 17.2123.

[0075] Please refer to Figures 5-6 , the control valve 010 provided in this embodiment has a manual operation mode and a pneumatic operation mode, and the working principle is as follows:

[0076] Working principle of the manual operation mode: By turning the handle 410 to control the rotation of the rotating shaft 400, the arc surface 420 of the rotating shaft 400 releases the limit of the limit groove 201 of the pressure arm 200, and the pressure arm 200 further releases the limit on the first piston 130. When the fire extinguishing agent enters from the air inlet 102, it pushes the first piston 130, and the first piston 130 can move upward along the first cavity 101. The first cavity 101 communicates with the air inlet 102 and the air outlet 103, so that the fire extinguishing agent can quickly enter from the air inlet 102 and then be discharged from the air outlet 103, enabling the fire extinguishing agent to be quickly released to the protected area through the pipeline.

[0077] Working principle of the pneumatic operation mode: Start the cylinder 500, the gas pushes the second piston 530, the second piston 530 moves along the second cavity 501 and pushes open the swing arm 300. The swing arm 300 rotates to drive the rotation of the rotating shaft 400. The arc surface 420 of the rotating shaft 400 releases the limit of the limit groove 201 of the pressure arm 200, releasing the pressure arm 200. The pressure arm 200 further releases the limit on the first piston 130. When the fire extinguishing agent enters from the air inlet 102, it pushes the first piston 130, and the first piston 130 can move upward along the first cavity 101. The first cavity 101 communicates with the air inlet 102 and the air outlet 103, so that the fire extinguishing agent can quickly enter from the air inlet 102 and then be discharged from the air outlet 103, enabling the fire extinguishing agent to be quickly released to the protected area through the pipeline.

[0078] In summary, the hand-operated and pneumatic control valve 010 proposed by the present utility model has a pressure arm structure. After startup, no components need to be replaced and it can be used repeatedly. At the same time, the control valve 010 has a manual operation mode and a pneumatic operation mode, and can be quickly opened to enable the fire extinguishing agent to be quickly released to the protected area.

[0079] The above is only the preferred embodiment of the present utility model and is not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A control valve that can be used for both hands and gas, characterized in that, Comprising: A valve body, within which a first cavity and a first piston are provided. An air inlet and an air outlet are provided on the first cavity. One end of the first piston is slidably disposed within the first cavity and is used to close or open the air inlet. A cylinder, which is connected to the valve body. A second cavity is provided within the cylinder, and a second piston is slidably disposed within the second cavity. A pressure arm, one end of which is rotatably connected to the valve body. A limiting groove is provided at the other end of the pressure arm. The other end of the first piston extends out of the valve body and abuts against the bottom wall of the pressure arm. A rotating arm, one end of which is rotatably connected to the valve body through a rotating shaft, and the other end abuts against the second piston. One end of the rotating shaft is fixed to the rotating arm, one end of the rotating shaft is limit-connected to the limiting groove, and a handle is fixed on the rotating shaft.

2. The hand-air dual-use control valve according to claim 1, characterized in that, The control valve further includes a first elastic member, one end of which is connected to the valve body through a fixing member, and the other end of which is connected to the rotating arm.

3. The hand-operated and pneumatic dual-use control valve according to claim 1, characterized in that, The control valve further includes a second elastic member, which is fixed to the valve body relative to the pressure arm, and the second elastic member abuts against the bottom of the other end of the pressure arm.

4. The hand-operated and pneumatic dual-use control valve according to claim 1, wherein, One end of the rotating shaft is provided with an arc surface, and the arc surface is limit-connected to the limiting groove.

5. The air and hand dual-use control valve according to claim 1, characterized in that, The pressure arm is provided with an opening relative to the first piston, and a sliding column is sleeved within the opening. The bottom of the sliding column extends out of the opening. The end face of the other end of the first piston abuts against the lower bottom surface of the sliding column.

6. The hand-air dual-use control valve according to claim 1, characterized in that, The valve body includes a first body and a second body. The first body is provided with a first mating cavity, and the air inlet and the air outlet communicated with the first mating cavity. The second body is provided with a second mating cavity. The second body is sleeved within the first mating cavity, and the first mating cavity and the second mating cavity form the first cavity.

7. The hand-operated and pneumatic dual-use control valve according to claim 6, characterized in that, The first body and the second body are hermetically connected through a sealing member.

8. The hand-air dual-use control valve according to claim 6, characterized in that, One end of the first piston is provided with a first limiting step at the bottom, and the first limiting step abuts against the inner wall of the first body to close or communicate the air inlet. One end of the first piston is provided with a second limiting step at the top, and the second limiting step is hermetically and slidably connected to the inner wall of the second body.

9. The hand-operated and pneumatically-operated control valve according to claim 8, characterized in that, A bushing is sleeved on the second limiting step. One end of the bushing is hermetically connected to the second limiting step, and the other end of the bushing is hermetically and slidably connected to the inner wall of the second body.

10. The hand-operated and pneumatic dual-use control valve according to claim 6, characterized in that, The cylinder is disposed on the first body. An installation cavity is provided at the top of the second body, and the pressure arm is disposed within the installation cavity. One end of the pressure arm is rotatably connected to the second body through a rotating member. The rotating arm is rotatably connected to the second body through a rotating member.

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