Selector valve

Abstract

The present application discloses a selection valve, comprising: a valve body, in which an air inlet, an air outlet and a first movable chamber are formed, and the air inlet is connected to the air inlet channel; a valve mechanism, comprising an air outlet pressure cap and a first piston, the air outlet pressure cap being detachably connected to the air outlet, the air outlet pressure cap comprising a sealing portion, the valve being movably arranged in the first movable chamber, the first piston and the sealing portion being sealed and cooperated to form a first valve, the first valve controlling the opening and closing of the air outlet and the air inlet; a control valve, which is fixedly connected to the valve body, and is used to control the movement of the first piston; and a manual device, which comprises a handle, and the handle can drive the first piston to move to open the first valve. The present application uses a pipeline to supply fire extinguishing gas, thereby making the start-up method of the modified selection valve simpler, the structure more compact, and less impact on the first piston, and can make the movement of the first piston more flexible, thereby extinguishing the fire faster.

Description

Technical Field

[0001] The present application relates to the technical field of valves, and in particular to a selection valve. Background Art

[0002] Currently, selector valves are used in firefighting combined distribution systems to shut off and on firefighting gases over long distances. These valves can be opened using either a valve core or a diaphragm puncture. The former requires high manufacturing requirements, while the latter requires disassembly of the electric actuator, disassembly of the selector valve, and replacement of the diaphragm, making it extremely inconvenient.

[0003] Existing selector valves usually have an air inlet and an air outlet distributed at 90 degrees, so the pipeline turns at a right angle after installation. The flat installation of the selector valve easily leads to waste of auxiliary pipelines, which reduces the fire extinguishing gas delivery pressure in the pipe due to the increase of the pipeline. At the same time, the setting method of the air inlet and outlet leads to high manufacturing costs.

[0004] On the other hand, since the selector valve closes due to external pressure on the piston, there is a certain amount of friction, and the structure lacks a buffer mechanism. When the valve opens, the valve generates a large impact force. This not only slows the valve movement, thereby increasing the time it takes to open the valve and affecting fire extinguishing time, but also can damage the valve and cause it to become stuck, compromising safety. Furthermore, the arrangement of the air inlet and outlet leads to high manufacturing costs. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a selection valve. The present application uses a pipeline fire extinguishing gas to make the starting method of the selection valve simpler, the structure more compact, and the impact on the first piston smaller, and the movement of the first piston more flexible, thereby extinguishing the fire faster; the manual device can manually intervene when the control valve fails, further improving safety and practicality.

[0006] To achieve the above objectives, the present application provides a selection valve, comprising: a valve body, in which an air inlet, an air outlet and a first active cavity are provided, the air inlet and the air inlet channel are connected; a valve mechanism, comprising an air outlet pressure cap and a first piston, the air outlet pressure cap is detachably connected to the air outlet, the air outlet pressure cap comprises a sealing portion, the first piston is movably arranged in the first active cavity, the first piston and the sealing portion are sealed and cooperated to form a first valve, the first valve controls the connection and disconnection of the air outlet and the air inlet; a control valve, which is fixed to the valve body, the control valve is used to control the movement of the first piston; and a manual device, which comprises a handle, the handle can drive the first piston to move to open the first valve.

[0007] Compared with the prior art, the beneficial effect of the present application is that the outlet pressure cap of the present application is detachably connected to the outlet, and the sealing portion on the outlet pressure cap cooperates with the first piston to form a first valve. Therefore, the detachable arrangement of the outlet pressure cap makes the installation of the selector valve more convenient and facilitates the replacement of the outlet pressure cap for equipment maintenance. The control valve controls the movement of the piston, thereby automatically completing the connection between the air inlet and the air outlet to complete the fire extinguishing action, and the manual device can manually intervene when the control valve fails, thereby greatly improving safety performance.

[0008] As an improvement, the valve mechanism also includes a retaining ring, which is threadedly engaged with the valve body, and the first piston is movably arranged in the retaining ring. The first piston is provided with a control part, and the control part, the retaining ring and the valve body are sealed and cooperated to form a first air chamber; an air inlet channel and an air outlet channel are also provided in the valve body, the inlet end of the air inlet channel is connected to the air inlet, and the outlet end is connected to the control valve, the inlet end of the air outlet channel is connected to the control valve, and the outlet end is connected to the first air chamber, and the control valve controls the air inlet channel and the air outlet. The opening and closing of the air outlet channel is used to control the opening and closing of the first valve. Through the above-mentioned improvement, the first air chamber is formed by the sealing cooperation of the control part, the retaining ring and the valve body, and the opening and closing of the air inlet channel and the air outlet channel are controlled by the control valve. Therefore, when the control valve connects the air inlet channel with the air outlet channel, the pressure of the fire extinguishing gas in the pipeline at the air inlet is large, thereby forcing the air pressure in the first air chamber to increase, thereby pushing the piston to move and opening the first valve, so that the opening of the selection valve can be completed without starting the gas, making the structure of the selection valve compact, and can effectively reduce the wear on the first piston and improve the service life.

[0009] As an improvement, the control valve includes a control block, a control mechanism and a sealing member. The control mechanism and the control block are sealed together to form a second air chamber, and the second air chamber is respectively connected to the outlet end of the air inlet channel and the inlet end of the air outlet channel; the control mechanism controls the sealing member to seal with the inlet end of the air outlet channel to form a second valve. When the control mechanism controls the sealing member to move to open the second valve, the air inlet channel is connected to the air outlet channel, and the air inlet is connected to the second air chamber. The first piston moves to open the first valve. Through the above improvement, the second air chamber is sealed together with the inlet end of the air outlet channel through the sealing member to form the second valve, so that the movement of the sealing member can be controlled by the control mechanism, thereby quickly controlling the opening and closing of the second valve. The structure is simple and stable, not easy to get stuck, and has high safety.

[0010] As an improvement, the manual device includes a connecting pressure cap and a second piston, and a second active chamber and a connecting channel are provided in the connecting pressure cap, and the second active chamber is connected to the air outlet channel through the connecting channel; a cavity is provided in the control block, and the cavity is communicated with the air inlet channel, and the cavity is communicated with the second active chamber, the second piston is connected to the handle, and the second piston is movably arranged in the second active chamber, and the second piston is used to control the connection and disconnection of the air outlet channel and the cavity. Through the above improvement, the connection and disconnection of the air outlet channel and the cavity are controlled by the movement of the second piston, so that the intervention of the second piston makes it possible to connect the air inlet channel and the air outlet channel even when the second valve is not opened, and the handle is connected to the second piston, so that the selection valve can still be opened through manual intervention when the controllable valve fails.

[0011] As an improvement, the manual device also includes a first sealing ring and a first spring. The first spring is fixed to the end of the second piston. A limiting hole is formed in the second active cavity. The second active cavity is connected to the connecting channel through the limiting hole. The first sealing ring and the limiting hole are sealed together to form a third valve. The second piston is used to control the opening and closing of the third valve; one end of the first spring is connected to the inner wall of the cavity, and the other end is connected to the second piston. Through the above improvement, the first sealing ring and the limiting hole are sealed together to form the third valve, which can effectively improve the sealing performance. The first spring can automatically reset the second piston through the first spring after the second piston is moved by the handle, and the limiting hole can not only seal with the first sealing ring, but also limit the maximum moving distance of the second piston, thereby preventing it from moving out of the use position.

[0012] As an improvement, the manual device also includes a socket, a cap, a limit pin and a second spring. The socket is pressed by the cap and threaded onto the connecting pressure cap. The handle is movably arranged in the socket. A travel groove is provided on the handle. The limit pin is fixed on the socket and passes through the travel groove to limit the extreme movement position of the handle. The second spring is arranged between the socket and the connecting pressure cap so that the handle is located at the extreme movement position under normal circumstances. Through the above improvement, the manual device is installed through the socket and the cap, so that the handle can be effectively connected to the second piston. The second spring can automatically reset the position of the handle after the second piston is moved by the handle.

[0013] As an improvement, the control mechanism includes an electromagnet, the sealing member is fixedly mounted at the end of the electromagnet, and the electromagnet controls the opening and closing of the second valve through the movement of the moving iron core therein; a second sealing ring is provided on the outer edge of the connecting part between the control valve and the valve body. Through the above improvements, the electromagnetic control method of the electromagnet is not only simple to control the switch, but also more sensitive, which can effectively improve the opening efficiency of the selection valve, and the first sealing ring can improve the sealing and avoid air leakage.

[0014] As an improvement, the valve mechanism also includes an air inlet pressure cap, which is detachably arranged in the air inlet. There are two air inlet channels, and the two air inlet channels are respectively opened in the air inlet pressure cap and the valve body, and the two air inlet channels are connected to each other. Through the above improvement, the air inlet pressure cap is detachably arranged, which can also facilitate the installation of the first piston. The splicing arrangement of the air inlet pressure cap and the air inlet channel on the valve eliminates the need to open a winding air inlet channel on the valve body, thereby simplifying the structure and improving the sealing performance.

[0015] As an improvement, the valve mechanism also includes a third spring, and the inner wall of the air inlet pressure cap protrudes inward to form a mounting portion. One end of the third spring is connected to the mounting portion, and the other end is connected to the end of the first piston. Through the above improvement, the third spring can enable the first piston to automatically reset after movement so that it can be used next time.

[0016] As an improvement, the valve mechanism also includes a sealing gasket, a first screw and a second screw. The sealing gasket is fixed to the sealing part by the first screw, and the sealing gasket cooperates with the first piston to form the first valve; the valve body is also provided with an air hole to make the movement of the first piston more flexible, and the second screw is arranged in the air hole to prevent debris from entering the valve body. Through the above improvement, the sealing gasket is detachably arranged to facilitate the replacement of the sealing gasket. The first screw is used for fixing, and the second screw can prevent debris from entering the air hole. The air holes are respectively connected between the valve body and the first piston, so that the movement of the first piston is more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic cross-sectional view of the overall structure of the valve body in this application.

[0018] Figure 2 This is a schematic diagram of the overall structural cross-section of the control valve in the application.

[0019] Figure 3 for Figure 1 A partial enlarged schematic diagram of the middle A.

[0020] Figure 4 for Figure 1 A partial enlarged schematic diagram of B in the figure.

[0021] Figure 5 for Figure 2 A partial enlarged schematic diagram of C in the middle.

[0022] Figure 6 Schematic diagram of the position distribution of the air inlet channel and the air outlet channel in this application.

[0023] In the figure: 1, valve body; 11, air inlet; 12, air outlet; 13, first movable cavity; 14, first air chamber; 15, air inlet channel; 16, air outlet channel; 17, air vent; 18, second air chamber; 21, air outlet pressure cap; 211, sealing portion; 212, sealing gasket; 213, first screw; 22, first piston; 221, control portion; 23, retaining ring; 24, air inlet pressure cap; 241, mounting portion; 25, third spring; 26, second screw Nail; 3. Control valve; 31. Control block; 311. Cavity; 32. Control mechanism; 321. Electromagnet; 322. Seal; 323. Second sealing ring; 4. Manual device; 41. Handle; 42. Connecting pressure cap; 421. Second movable cavity; 4211. Limiting hole; 422. Connecting channel; 43. Second piston; 44. First sealing ring; 45. First spring; 46. Socket; 47. Cap; 48. Limiting pin; 49. Second spring. DETAILED DESCRIPTION

[0024] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] In the description of this application, it should be noted that for directional words, such as the terms "center", "up", "down", "front", "back", "vertical", "horizontal", "inside", "outside", etc., the directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.

[0026] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0027] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0028] The present application provides a selection valve, such as Figure 1-6 As shown, it includes: a valve body 1, in which an air inlet 11, an air outlet 12 and a first active chamber 13 are provided, and the air inlet 11 is connected to the air inlet channel 15; a valve mechanism, including a pressure cap of the air outlet 12 and a first piston 22, the pressure cap of the air outlet 12 is detachably connected to the air outlet 12, the pressure cap of the air outlet 12 includes a sealing portion 211, the first piston 22 is movably arranged in the first active chamber 13, the first piston 22 and the sealing portion 211 are sealed and cooperated to form a first valve, and the first valve controls the connection and disconnection of the air outlet 12 and the air inlet 11; a control valve 3, which is fixedly connected to the valve body 1, and the control valve 3 is used to control the movement of the first piston 22; and a manual device 4, which includes a handle 41, and the handle 41 can drive the first piston 22 to move to open the first valve.

[0029] Preferably, Figure 1 As shown, the valve mechanism also includes a sealing gasket 212, a first screw 213 and a second screw 26. The sealing gasket 212 is fixed to the sealing portion 211 by the first screw 213. The sealing gasket 212 and the first piston 22 are sealed together to form a first valve; an air vent 17 is also provided on the valve body 1 to make the movement of the first piston 22 more flexible. The second screw 26 is arranged in the air vent 17 to prevent debris from entering the valve body 1.

[0030] Specifically, such as Figure 1-2 As shown, the valve mechanism also includes a retaining ring 23, which is threadedly engaged in the valve body 1, and the first piston 22 is movably arranged in the retaining ring 23. The first piston 22 is provided with a control part 221, and the control part 221, the retaining ring 23 and the valve body 1 are sealed and cooperated to form a first air chamber 14; an air inlet channel 15 and an air outlet channel 16 are also provided in the valve body 1, the inlet end of the air inlet channel 15 is connected to the air inlet 11, and the outlet end is connected to the control valve 3, the inlet end of the air outlet channel 16 is connected to the control valve 3, and the outlet end is connected to the first air chamber 14, and the control valve 3 controls the opening and closing of the first valve by controlling the connection and disconnection of the air inlet channel 15 and the air outlet channel 16.

[0031] Specifically, such as Figure 2As shown, the control valve 3 includes a control block 31, a control mechanism 32 and a sealing member 322. The control mechanism 32 and the control block 31 are sealed together to form a second air chamber 18. The second air chamber 18 is respectively connected to the outlet end of the air inlet channel 15 and the inlet end of the air outlet channel 16; the control mechanism 32 controls the sealing member 322 to seal with the inlet end of the air outlet channel 16 to form a second valve. When the control mechanism 32 controls the sealing member 322 to move to open the second valve, the air inlet channel 15 is connected to the air outlet channel 16, the air inlet 11 is connected to the second air chamber 18, and the first piston 22 moves to open the first valve.

[0032] Specifically, such as Figure 5 As shown, the manual device 4 includes a connecting pressure cap 42 and a second piston 43. A second active chamber 421 and a connecting channel 422 are provided in the connecting pressure cap 42. The second active chamber 421 is connected to the air outlet channel 16 through the connecting channel 422. A cavity 311 is provided in the control block 31. The cavity 311 is communicated with the air inlet channel 15. The cavity 311 is communicated with the second active chamber 421. The second piston 43 is connected to the handle 41, and the second piston 43 is movably arranged in the second active chamber 421. The second piston 43 is used to control the connection and disconnection of the air outlet channel 16 and the cavity 311.

[0033] Specifically, such as Figure 2 、 5 As shown, the manual device 4 also includes a first sealing ring 44 and a first spring 45. The first spring 45 is fixed to the end of the second piston 43. A limiting hole 4211 is formed in the second active cavity 421. The second active cavity 421 is connected to the connecting channel 422 through the limiting hole 4211. The first sealing ring 44 and the limiting hole 4211 are sealed and cooperated to form a third valve. The second piston 43 is used to control the opening and closing of the third valve; one end of the first spring 45 is connected to the inner wall of the cavity 311, and the other end is connected to the second piston 43.

[0034] Specifically, such as Figure 2 As shown, the manual device 4 also includes a socket 46, a cap 47, a limit pin 48 and a second spring 49. The socket 46 is pressed by the cap 47 and screwed onto the connecting pressure cap 42. The handle 41 is movably arranged in the socket 46. A travel groove is provided on the handle 41. The limit pin 48 is fixed on the socket 46 and passes through the travel groove to limit the extreme movement position of the handle 41. The second spring 49 is arranged between the socket 46 and the connecting pressure cap 42 to make the handle 41 located at the extreme movement position under normal conditions.

[0035] Specifically, such as Figure 2 、 5As shown, the control mechanism 32 includes an electromagnet 321, a seal 322 is fixed to the end of the electromagnet 321, and the electromagnet 321 controls the opening and closing of the second valve through the movement of the moving iron core therein; a second sealing ring 323 is provided on the outer edge of the connection part between the control valve 3 and the valve body 1.

[0036] Specifically, such as Figure 4 As shown, the valve mechanism also includes an air inlet 11 pressure cap, which is detachably arranged in the air inlet 11. There are two air inlet channels 15, which are respectively opened in the air inlet 11 pressure cap and the valve body 1, and the two air inlet channels 15 are connected to each other.

[0037] Specifically, such as Figure 1 As shown, the valve mechanism also includes a third spring 25 , and the inner wall of the pressure cap of the air inlet 11 protrudes inward to form a mounting portion 241 . One end of the third spring 25 is connected to the mounting portion 241 , and the other end is connected to the end of the first piston 22 .

[0038] The operating principle of this application is as follows: This selector valve is connected to a pipeline with the same inlet and outlet diameter as the valve, and the electromagnet 321 on the selector valve is connected to a power supply. When needed, the electromagnet 321 is powered on, and the movable iron core on the electromagnet 321 actuates to open the valve (electrically). Simultaneously, fire extinguishing gas flows from the selector valve inlet 11 into the inlet passage 15, the second air chamber 18, through the second valve (electrically), and into the outlet passage 16, reaching the first air chamber 14. As the gas pressure in the first air chamber 14 rises, the first piston 22 moves rightward, opening the selector valve. Because the first air chamber 14, outlet passage 16, inlet passage 15, and second air chamber 18 are interconnected, once the fire extinguishing gas is discharged from the pipeline, the gas pressure in the air chambers is eliminated. The first piston 22, under the spring force of the third spring 25, pushes the first piston 22 leftward, closing the selector valve. Simultaneously, the electromagnet 321 is powered off, and the movable iron core actuates to close the valve (electrically).

[0039] If the control valve 3 unexpectedly fails to operate, the handle 41 can be pushed, causing it to push the second piston 43 to move rightward, separating the first sealing ring 44 from the limiting hole 4211, thereby opening the second valve. Fire extinguishing gas can enter the outlet channel 16 through the air inlet 11, the air inlet channel 15, the cavity 311, the second active chamber 421, and the connecting channel 422, and then flow into the first air chamber 14, causing the first piston 22 to move rightward, thereby opening the selector valve.

[0040] Since the first air chamber 14, the air outlet channel 16, the air inlet channel 15, the air outlet 12 and the air inlet 11 are connected, when the fire extinguishing gas in the pipeline is sprayed out, the gas pressure in the air chamber is eliminated, the second piston 43 is reset under the action of the first spring 45 to close the third valve, and the handle 41 is reset under the action of the second spring 49.

[0041] The electromagnet 321 of the selective valve driving device of the present application has two valves (electric) and (manual), which can be operated separately or simultaneously.

[0042] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments. The above embodiments and description only illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. Such changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A selector valve, characterized in that: include: A valve body, in which an air inlet, an air outlet and a first movable cavity are formed, wherein the air inlet is connected to the air inlet channel; a valve mechanism comprising an outlet pressure cap and a first piston, wherein the outlet pressure cap is detachably connected to the outlet, the outlet pressure cap comprises a sealing portion, the first piston is movably disposed in the first movable chamber, the first piston and the sealing portion are sealed and cooperate to form a first valve, and the first valve controls the opening and closing of the outlet and the inlet; a control valve fixedly connected to the valve body, the control valve being used to control the movement of the first piston; and A manual device comprising a handle, wherein the handle can drive the first piston to move to open the first valve; The valve mechanism further includes a retaining ring, the retaining ring being threadedly engaged with the valve body, the first piston being movably disposed in the retaining ring, the first piston being provided with a control portion, the control portion, the retaining ring and the valve body being sealed and engaged to form a first air chamber; The valve body is further provided with an air inlet channel and an air outlet channel, the inlet end of the air inlet channel is connected to the air inlet, and the outlet end is connected to the control valve, the inlet end of the air outlet channel is connected to the control valve, and the outlet end is connected to the first air chamber, and the control valve controls the opening and closing of the first valve by controlling the connection and disconnection of the air inlet channel and the air outlet channel; The control valve includes a control block, a control mechanism and a sealing member, wherein the control mechanism and the control block are sealed together to form a second air chamber, and the second air chamber is respectively connected to the outlet end of the air inlet channel and the inlet end of the air outlet channel; The control mechanism controls the sealing member to seal with the inlet end of the air outlet channel to form a second valve. When the control mechanism controls the sealing member to move and open the second valve, the air inlet channel is connected to the air outlet channel, the air inlet is connected to the second air chamber, and the first piston moves to open the first valve. The manual device includes a connecting pressure cap and a second piston, a second active cavity and a connecting channel are opened in the connecting pressure cap, and the second active cavity is connected to the air outlet channel through the connecting channel; A cavity is defined in the control block, the cavity is communicated with the air inlet channel, the cavity is communicated with the second active chamber, the second piston is connected to the handle, and the second piston is movably disposed in the second active chamber, and the second piston is used to control the opening and closing of the air outlet channel and the cavity.

2. The selector valve according to claim 1, wherein: The manual device also includes a first sealing ring and a first spring. The first spring is fixed to the end of the second piston. A limiting hole is formed in the second active cavity. The second active cavity is connected to the connecting channel through the limiting hole. The first sealing ring and the limiting hole are sealed and cooperated to form a third valve. The second piston is used to control the opening and closing of the third valve. One end of the first spring is connected to the inner wall of the cavity, and the other end is connected to the second piston.

3. The selector valve according to claim 2, wherein: The manual device also includes a socket, a splicing cap, a limit pin and a second spring. The socket is pressed by the splicing cap and threaded onto the connecting pressure cap. The handle is movably arranged in the socket. A travel groove is provided on the handle. The limit pin is fixed on the socket and passes through the travel groove to limit the extreme movement position of the handle. The second spring is arranged between the socket and the connecting pressure cap to ensure that the handle is located at the extreme movement position under normal circumstances.

4. The selector valve according to claim 1, wherein: The control mechanism includes an electromagnet, the sealing member is fixed to the end of the electromagnet, and the electromagnet controls the opening and closing of the second valve through the movement of the moving iron core therein; a second sealing ring is provided on the outer edge of the connection part between the control valve and the valve body.

5. The selector valve according to claim 1, wherein: The valve mechanism also includes an air inlet pressure cap, which is detachably arranged in the air inlet. There are two air inlet channels, which are respectively opened in the air inlet pressure cap and the valve body, and the two air inlet channels are connected to each other.

6. The selector valve according to claim 5, wherein: The valve mechanism also includes a third spring. The inner wall of the air inlet pressure cap protrudes inward to form a mounting portion. One end of the third spring is connected to the mounting portion, and the other end is connected to the end of the first piston.

7. The selector valve according to any one of claims 1 to 6, characterized in that: The valve mechanism also includes a sealing gasket, a first screw and a second screw. The sealing gasket is fixed to the sealing portion by the first screw. The sealing gasket and the first piston are sealed together to form the first valve. An air vent is also provided on the valve body to make the movement of the first piston more flexible. The second screw is arranged in the air vent to prevent debris from entering the valve body.

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