CN116753341A - selector valve - Google Patents

Abstract

This application discloses a selection valve, which includes: a valve body, which is provided with an air inlet, an air outlet and a first movable chamber, and the air inlet is connected with the air inlet channel; a valve mechanism, which includes an air outlet pressure cap and a first movable chamber. The piston and the air outlet pressure cap are detachably connected to the air outlet. The air outlet pressure cap includes a sealing part. The valve is movably arranged in the first movable chamber. The first piston and the sealing part sealingly cooperate to form a first valve. The first valve controls the outlet. The air port and the air inlet are connected and disconnected; the control valve is fixedly connected to the valve body, and the control valve is used to control the movement of the first piston; and the manual device includes a handle, which can drive the first piston to move to open the first piston. valve. This application uses pipeline fire extinguishing gas, thereby making the starting method of the selection valve simpler, the structure more compact, and the impact on the first piston is smaller, and the movement of the first piston can be made more flexible and faster. of fire extinguishing.

Description

selector valve

Technical field

The present application relates to the technical field of valves, and in particular to a selector valve.

Background technique

Currently, the selector valve used in the fire protection combined distribution system is a valve used to deliver fire extinguishing gases over long distances. There are two ways to open the selector valve: valve core and diaphragm piercing; the former requires high manufacturing requirements, while the latter must disengage the electric device after use, disassemble the selector valve, and replace the diaphragm, which is extremely inconvenient to use.

Existing selector valves usually use a 90° distribution of the air inlet and air outlet, so the pipeline turns at a right angle after installation. The flat installation of the selector valve easily causes waste of auxiliary pipeline equipment, which causes the fire-extinguishing gas delivery pressure in the pipe to change due to the pipeline. It decreases with the growth, and at the same time, the manufacturing cost is high due to the way the air inlet and air outlet are arranged.

On the other hand, since the selector valve is closed and pressure is exerted on the piston from the outside, there is a certain friction force, and there is no buffer mechanism in the structure. When the valve is opened, the valve will form a large impact force, which will not only make the valve move slowly, but also cause the valve to move slowly. This increases the opening time of the valve, affects the fire extinguishing time, and may cause the valve to be damaged and stuck, thus affecting safety. On the other hand, the manufacturing cost is high due to the arrangement of the air inlets and air outlets.

Contents of the invention

In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a selector valve. This application uses pipeline fire extinguishing gas, thereby making the starting method of the selector valve simpler, the structure more compact, and the first piston is affected. The impact is smaller and can make 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.

In order to achieve the above purpose, this application provides a selection valve, which includes: a valve body in which an air inlet, an air outlet and a first movable chamber are provided, and the air inlet is connected to the air inlet channel; a valve mechanism , including 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 includes a sealing portion. The first piston is movably arranged on the first movable In the cavity, the first piston and the sealing portion are sealingly matched to form a first valve. The first valve controls the on-off of the air outlet and the air inlet; a control valve is fixedly connected to the valve. On the body, the control valve is used to control the movement of the first piston; and a manual device includes a handle, and the handle can drive the first piston to move to open the first valve.

Compared with the prior art, the beneficial effect of this application is that: the air outlet pressure cap of the present application is detachably connected to the air outlet, and the sealing portion on the air outlet pressure cap cooperates with the first piston to form the first valve. Therefore, The detachable setting of the air outlet pressure cap makes the installation of the selection valve more convenient, and it is easy to replace the air outlet pressure cap to maintain the equipment. The control valve controls the movement of the piston to automatically complete the connection between the air inlet and the air outlet to complete the fire extinguishing action. The manual device can manually intervene when the control valve fails, thus greatly improving the safety performance.

As an improvement, the valve mechanism further includes a retaining ring, the retaining ring is threadedly engaged in the valve body, the first piston is movably arranged in the retaining ring, and a control part is provided on the first piston. The control part, the retaining ring and the valve body seal and cooperate to form a first air chamber; the valve body is also provided with an air inlet channel and an air outlet channel, and the inlet end of the air inlet channel is connected with the air inlet. , the outlet end is connected to the control valve, the inlet end of the air outlet channel is connected to the control valve, 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 channel is used to control the opening and closing of the first valve. Through the above improvements, the first air chamber is formed through 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. , so 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 high, which forces the air pressure in the first air chamber to increase, thereby pushing the piston to move and opening the first valve, thus The selection valve can be opened without starting gas, making the selection valve compact in structure, effectively reducing wear on the first piston and increasing service life.

As an improvement, the control valve includes a control block, a control mechanism and a seal. The control mechanism seals with the control block to form a second air chamber. The second air chamber is connected to the outlet end of the air inlet channel respectively. It is connected with the inlet end of the air outlet channel; the control mechanism controls the sealing member to sealingly cooperate 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, When the valve is opened, the air inlet channel is connected to the air outlet channel, the air inlet is connected to the second air chamber, the first piston moves to open the first valve, and through the above improvement, the second air chamber passes The seal cooperates with the inlet end of the air outlet channel to form a second valve, so that the movement of the seal can be controlled by the control mechanism to quickly control the opening and closing of the second valve. The structure is simple and stable, not easy to get stuck, and has high safety.

As an improvement, the manual device includes a connecting pressure cap and a second piston, a second movable chamber and a connecting channel are provided in the connecting pressure cap, and the second movable chamber is connected to the air outlet channel through the connecting channel; A cavity is provided in the control block, the cavity is connected to the air inlet channel, the cavity is connected to the second movable chamber, the second piston is connected to the handle, and the third piston is connected to the handle. Two pistons are movably arranged in the second movable chamber. The second piston is used to control the opening and closing of the air outlet channel and the cavity. Through the above improvement, the air outlet channel and the cavity are controlled by the movement of the second piston. On and off, so that through the intervention of the second piston, the air inlet channel and the air outlet channel can be connected even when the second valve is not open, and the handle is connected to the second piston, so manual intervention can be used when the controllable valve fails. The selector valve can still be opened.

As an improvement, the manual device further includes a first sealing ring and a first spring. The first spring is fixed at the end of the second piston. A limiting hole is formed in the second movable chamber. The two movable chambers are connected to the connecting channel through the limiting hole, the first sealing ring sealingly cooperates with the limiting hole to form a third valve, and the second piston is used to control the opening of the third valve. closed; 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 limit hole sealingly cooperate to form a third valve, which can effectively improve the Sealing, the first spring can automatically reset the second piston through the first spring after moving the second piston through the handle, and the limit hole can not only seal with the first sealing ring, but also limit the movement of the second piston. Limit movement distance to prevent it from moving out of position.

As an improvement, the manual device also includes a socket, a split cap, a limiting pin and a second spring. The socket is pressed by the split cap and screwed onto the connection pressure cap. The handle is movably arranged on In the socket, a travel groove is provided on the handle, and the limiting pin is fixed on the socket and passes through the travel groove to limit the extreme movement position of the handle, and the second spring resists Between the handle seat and the connection pressure cap, so that the handle is located at the extreme movement position under normal conditions, through the above improvements, the manual device is installed through the socket and the split cap, so that the handle can be effectively connected to the second On the piston, the second spring can automatically reset the position of the handle after moving the second piston through the handle.

As an improvement, the control mechanism includes an electromagnet, the sealing member is fixed on an end of the electromagnet, and the electromagnet controls the opening and closing of the second valve through the movement of a moving iron core inside the electromagnet; A second sealing ring is provided on the outer edge of the connection 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 selector valve. A sealing ring can improve sealing and avoid air leakage.

As an improvement, the valve mechanism further includes an air inlet pressure cap, the air inlet pressure cap is detachably disposed in the air inlet, the number of the air inlet channels is two, and the two air inlet channels They are respectively opened in the air inlet pressure cap and the valve body, and the two air inlet channels are connected with 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 for a curved air inlet channel on the valve body, thereby simplifying the structure and improving sealing.

As an improvement, the valve mechanism further 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 first At the end of the piston, through the above improvement, the third spring can enable the first piston to automatically reset after moving for next use.

As an improvement, the valve mechanism further includes a sealing gasket, a first screw and a second screw. The sealing gasket is fixed on the sealing part through the first screw, and the sealing gasket sealingly cooperates with the first piston. The first valve is formed; a breather hole is also provided on the valve body to make the movement of the first piston more flexible, and the second screw in the breather hole is provided in the breather hole to prevent debris from entering. As for 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 fixation, and the second screw can prevent debris from entering the ventilation hole, and the ventilation holes are respectively connected to the valve body and the valve body. between the first piston, thereby making the movement of the first piston more flexible.

Description of the drawings

Figure 1 is a schematic cross-sectional view of the overall structure of the valve body in this application;

Figure 2 is a schematic cross-sectional view of the overall structure of the control valve in the application;

Figure 3 is a partially enlarged schematic diagram of A in Figure 1;

Figure 4 is a partially enlarged schematic diagram of B in Figure 1;

Figure 5 is a partially enlarged schematic diagram of C in Figure 2;

Figure 6 is a schematic diagram of the position distribution of the air inlet channel and the air outlet channel in this application.

In the figure: 1. Valve body; 11. Air inlet; 12. Air outlet; 13. First movable chamber; 14. First air chamber; 15. Air inlet channel; 16. Air outlet channel; 17. Breathing hole; 18 , Second air chamber; 21. Air outlet pressure cap; 211. Sealing part; 212. Sealing gasket; 213. First screw; 22. First piston; 221. Control part; 23. Back-up ring; 24. Air inlet Pressure cap; 241, mounting part; 25, third spring; 26, second screw; 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. Connection pressure cap; 421. Second movable chamber; 4211. Limit hole; 422. Connection channel; 43. Second piston; 44. First Sealing ring; 45. First spring; 46. Socket; 47. Splice cap; 48. Limit pin; 49. Second spring.

Detailed ways

Below, the present application will be further described with reference to specific implementation modes. It should be noted that, on the premise that there is no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

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

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.

The terms "comprising" and "having" and any variations thereof in the description and claims of this application are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or product that includes a series of steps or units. Apparatus are not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such processes, methods, products or devices.

This application provides a selection valve, as shown in Figures 1-6, including: a valve body 1, which is provided with an air inlet 11, an air outlet 12 and a first movable chamber 13, an air inlet 11 and an air inlet channel 15 Connected; the valve mechanism includes 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 on the first piston. In a movable chamber 13, the first piston 22 and the sealing portion 211 seal and cooperate to form a first valve. The first valve controls the opening and closing of the air outlet 12 and the air inlet 11; the control valve 3 is fixedly connected to the valve body 1. The control valve 3 is used to control the movement of the first piston 22; and the manual device 4 includes a handle 41, which can drive the first piston 22 to move to open the first valve.

Preferably, as shown in FIG. 1 , the valve mechanism also includes a sealing gasket 212 , a first screw 213 and a second screw 26 . The sealing gasket 212 is fixed on the sealing part 211 through the first screw 213 . The sealing gasket 212 and the first piston 22 The sealing fit forms the first valve; the valve body 1 is also provided with a vent hole 17 to make the first piston 22 move more flexibly. The vent hole 17 and the second screw 26 are provided in the vent hole 17 to prevent debris from entering the valve body 1 .

Specifically, as shown in Figure 1-2, the valve mechanism also includes a retaining ring 23. The retaining ring 23 is threadedly fitted in the valve body 1. The first piston 22 is movably arranged in the retaining ring 23. The first piston 22 is provided with a control Part 221, the control part 221, the retaining ring 23 and the valve body 1 seal and cooperate to form the first air chamber 14; the valve body 1 is also provided with an air inlet channel 15 and an air outlet channel 16. The inlet end of the air inlet channel 15 and the air inlet 11 is connected, 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, the outlet end is connected to the first air chamber 14, the control valve 3 controls the opening and closing of the air inlet channel 15 and the air outlet channel 16 to Control the opening and closing of the first valve.

Specifically, as shown in Figure 2, the control valve 3 includes a control block 31, a control mechanism 32 and a seal 322. The control mechanism 32 and the control block 31 seal and cooperate to form a second air chamber 18. The second air chamber 18 is connected to the intake air respectively. The outlet end of the channel 15 is connected with the inlet end of the air outlet channel 16; the control mechanism 32 controls the seal 322 to sealingly cooperate with the inlet end of the air outlet channel 16 to form a second valve. When the control mechanism 32 controls the seal 322 to move and open the second valve, The air inlet passage 15 communicates with the air outlet passage 16, the air inlet 11 communicates with the second air chamber 18, and the first piston 22 moves to open the first valve.

Specifically, as shown in Figure 5, the manual device 4 includes a connecting pressure cap 42 and a second piston 43. A second movable chamber 421 and a connecting channel 422 are provided in the connecting pressure cap 42. The second movable chamber 421 is connected to the connecting channel 422 through the connecting channel 422. The air outlet channel 16 is connected; a cavity 311 is provided in the control block 31, the cavity 311 is connected with the air inlet channel 15, the cavity 311 is connected with the second movable cavity 421, the second piston 43 is connected with the handle 41, and the second piston 43 Movably disposed in the second movable chamber 421 , the second piston 43 is used to control the connection between the air outlet channel 16 and the cavity 311 .

Specifically, as shown in Figures 2 and 5, the manual device 4 also includes a first sealing ring 44 and a first spring 45. The first spring 45 is fixed at the end of the second piston 43, and the second movable chamber 421 A limiting hole 4211 is formed inside. The second movable chamber 421 is connected to the connecting channel 422 through the limiting hole 4211. The first sealing ring 44 sealingly cooperates with the limiting hole 4211 to form the third valve. The second piston 43 is used to control the third valve. opening and closing; 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.

Specifically, as shown in Figure 2, the manual device 4 also includes a socket 46, a split cap 47, a limiting pin 48 and a second spring 49. The socket 46 is pressed by the split cap 47 and screwed onto the connecting pressure cap 42. The handle 41 is movably installed in the socket 46. The handle 41 is provided with a travel groove. The limiting 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 against the handle 41. between the seat and the connection pressure cap 42, so that the handle 41 is located at the extreme movement position under normal conditions.

Specifically, as shown in Figures 2 and 5, the control mechanism 32 includes an electromagnet 321. The seal 322 is fixed on the end of the electromagnet 321. The electromagnet 321 controls the opening of the second valve through the movement of the moving iron core inside it. Close; 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.

Specifically, as shown in Figure 4, the valve mechanism also includes a pressure cap for the air inlet 11. The pressure cap for the air inlet 11 is detachably provided in the air inlet 11. The number of the air inlet channels 15 is two, and the two air inlets are The channels 15 are respectively opened in the pressure cap of the air inlet 11 and in the valve body 1, and the two air inlet channels 15 are connected with each other.

Specifically, as shown in Figure 1, the valve mechanism also includes a third spring 25. The inner wall of the pressure cap of the air inlet 11 protrudes inward to form a mounting part 241. One end of the third spring 25 is connected to the mounting part 241, and the other end is connected to the third spring 25. The end of a piston 22.

The working principle of this application is as follows: this selector valve is connected to a pipeline with the same diameter as the valve inlet and outlet, and the electromagnet 321 on the selector valve is connected to the power supply device. When needed, the electromagnet 321 is powered on, and the electromagnet 321 moves the iron core to open the valve (electrically). At the same time, the fire extinguishing gas enters the air inlet channel 15 from the selector valve inlet 11 and the second air chamber 18 through the second The valve (electric) flows to the air outlet channel 16 to the first air chamber 14. After the gas pressure in the first air chamber 14 rises, the first piston 22 moves to the right to open the selector valve. Since the first air chamber 14, the air outlet channel 16, the air inlet channel 15 and the second air chamber 18 are connected, after the fire extinguishing gas in the pipeline is discharged, the gas pressure in the air chamber is eliminated, and the first piston 22 moves in the third The spring force on the spring 25 pushes the first piston 22 to the left to close the selector valve; at the same time, the electromagnet 321 turns off the power, and the moving iron core moves to close the valve (electrically).

When the control valve 3 unexpectedly fails to operate, the handle 41 can be pushed so that the handle 41 pushes the second piston 43 to move to the right and separates the first sealing ring 44 from the limiting hole 4211, thereby opening the second valve. The fire extinguishing gas can enter the air outlet channel 16 from the air inlet 11, the air inlet channel 15, the cavity 311 through the second movable chamber 421 and the connecting channel 422, and flow to the first air chamber 14, causing the first piston 22 to move to the right, thereby opening the selection valve valve.

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 discharged, the gas pressure in the air chamber is eliminated, and the second piston 43 The third valve is reset and closed under the action of the first spring 45, and the handle 41 is reset under the action of the second spring 49.

The electromagnet 321 of the selection valve driving device of this application has two valves (electric) and (manual), which can be operated individually or simultaneously.

The above describes the basic principles, main features and advantages of the present application. Those skilled in the industry should understand that the present application is not limited by the above-mentioned embodiments. What is described in the above-mentioned embodiments and descriptions is only the principle of the present application. The present application will have various applications without departing from the spirit and scope of the present application. changes and improvements that fall within the scope of the claimed application. The scope of protection claimed in this application is defined by the appended claims and their equivalents.

Claims (10)

1. A selection valve, characterized in that it includes: The valve body has an air inlet, an air outlet and a first movable chamber, and the air inlet is connected to the air inlet channel; The valve mechanism includes 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 includes a sealing portion. The first piston is movably arranged on the third air outlet. In a movable chamber, the first piston and the sealing part are sealingly matched to form a first valve, and the first valve controls 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 includes a handle that can drive the first piston to move to open the first valve. 2. The selector valve according to claim 1, wherein the valve mechanism further includes a retaining ring, the retaining ring is threadedly engaged in the valve body, and the first piston is movably arranged in the retaining ring. , the first piston is provided with a control part, the control part, the retaining ring and the valve body sealingly cooperate to form a first air chamber; The valve body is also 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, the outlet end is connected to the control valve, and the inlet end of the air outlet channel is connected to the A control valve has an outlet end connected to the first air chamber, and the control valve controls the opening and closing of the first valve by controlling the opening and closing of the air inlet channel and the air outlet channel. 3. The selector valve according to claim 2, wherein the control valve includes a control block, a control mechanism and a seal, the control mechanism sealingly cooperates with the control block to form a second air chamber, and the third The two air chambers are respectively connected with 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 sealingly cooperate 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 and the inlet end of the air outlet channel are sealed. The air outlet channel is connected, the air inlet is connected with the second air chamber, and the first piston moves to open the first valve. 4. The selector valve according to claim 3, characterized in that: the manual device includes a connecting pressure cap and a second piston, a second movable chamber and a connecting channel are provided in the connecting pressure cap, and the second movable The cavity is connected to the air outlet channel through the connecting channel; A cavity is provided in the control block, the cavity is connected to the air inlet channel, the cavity is connected to the second movable chamber, the second piston is connected to the handle, and the third piston is connected to the handle. Two pistons are movably arranged in the second movable chamber, and the second piston is used to control the connection between the air outlet channel and the cavity. 5. The selector valve according to claim 4, wherein the manual device further includes a first sealing ring and a first spring, the first spring is fixed at the end of the second piston, and the A limiting hole is formed in the second movable chamber, the second movable chamber is connected with the connecting channel through the limiting hole, the first sealing ring sealingly cooperates with the limiting hole 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. 6. The selector valve according to claim 5, characterized in that: the manual device further includes a socket, a split cap, a limiting pin and a second spring, the socket is pressed by the split cap and screwed to the On the connection pressure cap, the handle is movably arranged in the socket, a stroke groove is provided on the handle, and the limit pin is fixed on the socket and passes through the stroke groove to limit the At the extreme movement position of the handle, the second spring is disposed between the handle base and the connection pressure cap, so that the handle is located at the extreme movement position under normal conditions. 7. The selector valve according to claim 3, wherein the control mechanism includes an electromagnet, the sealing member is fixed at an end of the electromagnet, and the electromagnet passes through a moving iron core inside the electromagnet. Movement to control the opening and closing of the second valve; a second sealing ring is provided on the outer edge of the connection part between the control valve and the valve body. 8. The selector valve according to claim 2, wherein the valve mechanism further includes an air inlet pressure cap, the air inlet pressure cap is detachably disposed in the air inlet, and the air inlet pressure cap is removably disposed in the air inlet. The number of channels is two, 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 with each other. 9. The selector valve according to claim 8, wherein the valve mechanism further includes a third spring, the inner wall of the air inlet pressure cap protrudes inward to form a mounting portion, and one end of the third spring The mounting part is connected, and the other end is connected to the end of the first piston. 10. The selector valve according to any one of claims 1 to 9, characterized in that: the valve mechanism further includes a sealing gasket, a first screw and a second screw, and the sealing gasket is fixed to the first screw by the first screw. On the sealing part, the sealing gasket and the first piston sealingly cooperate to form the first valve; the valve body is also provided with a ventilation hole to make the movement of the first piston more flexible. The ventilation hole The second screw is disposed in the ventilation hole to prevent debris from entering the valve body.