High-pressure valve capable of being started repeatedly

Abstract

The invention provides a high-pressure repeated starting valve, and belongs to the technical field of valves. The technical problem that an existing high-pressure repeatedly-started valve can be started for the second time only by replacing a new sealing piece and reinstalling the new sealing piece is solved. A high-pressure multi-starting valve comprises a valve body and a valve cover assembly which are fixedly connected, an air inlet hole and an air outlet hole are formed in the valve body, a piston in sealed sliding connection with the valve body is arranged in the valve body, and an electromagnetic driving device is fixedly arranged on the valve cover assembly. The electromagnetic driving device can circularly drive the piston to abut against or be away from the air inlet so as to close or open the air outlet. The device can be opened and closed for multiple times in a circulation state of standing, starting, closing back and standing, time is saved, the utilization rate is increased, and the working efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of valves, and in particular relates to a high-pressure multiple-start valve. Background Art

[0002] High-pressure multiple start valves are applied to fire extinguishing system fire extinguishing agent bottle groups. In the prior art, for example, an electromagnetic container valve with a publication number of CN108488393A discloses that the electromagnetic container valve seals and fixes the lower end of the valve body to the container. When the gas in the container needs to be discharged, the electromagnetic power unit is controlled to work, and the electromagnetic power unit presses the push rod downward. The push rod slides downward and punctures the sealing sheet through the puncture needle. The gas in the container enters between the disc and the start seat through the channel in the piston rod. Since the force area of ​​the disc at the upper end of the piston rod is much larger than the area of ​​the lower end of the piston rod, the piston rod is pushed down under the action of gas pressure. While the piston rod descends, the gas between the disc and the cavity separation ring is compressed, and the gas is discharged through the vent hole; when the piston rod descends, the sealing ring on the plug head is separated from the annular protrusion. At this time, the gas in the container enters the cavity between the cavity separation ring and the plug head through the gap between the sealing ring and the annular protrusion, and finally discharges the valve body through the interface. After the sealing sheet of the container valve is punctured, it needs to be replaced with a new sealing sheet and reinstalled to achieve the second start, which is inconvenient to operate. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention aims to provide a high-pressure multiple-start valve. The technical problem to be solved by the present invention is: how to enable the high-pressure valve to be started multiple times in a cycle and shorten the closing time.

[0004] The objectives of the present invention can be achieved through the following technical solutions: a high-pressure multiple-start valve, comprising a valve body and a valve cover assembly fixedly connected, the valve body is provided with an air inlet hole and an air outlet hole, the valve body is provided with a piston sealingly and slidingly connected to the valve body, and the valve cover assembly is fixedly provided with an electromagnetic drive device, the electromagnetic drive device can drive the piston to abut against or away from the air inlet hole for multiple cycles to close or open the air outlet hole.

[0005] Furthermore, a first chamber is formed between the lower end of the valve cover assembly, the inner periphery of the valve body and the upper end of the piston, a first exhaust chamber is formed between the side of the valve cover assembly and the valve body, a spring is also arranged between the valve cover assembly and the piston, a quantitative hole which is always connected to the air inlet hole is arranged in the piston, the quantitative hole is always connected to the first chamber, a first air hole which is always connected to the first chamber is arranged in the valve cover assembly, a second chamber which is always connected to the first air hole is arranged between the valve cover assembly and the electromagnetic drive device, an exhaust hole is also arranged on the valve cover assembly, the electromagnetic drive device can block or open the exhaust hole, the exhaust hole is always connected to the first exhaust chamber, and the diameter of the exhaust hole is larger than the diameter of the quantitative hole.

[0006] Furthermore, the piston includes a first sealing column and a second sealing column, the outer diameter of the first sealing column is larger than the outer diameter of the second sealing column, a convex ring protrudes inwardly from the inner wall of the valve body, the first sealing column is sealingly and slidingly connected to the inner wall of the valve body, the second sealing column is sealingly and slidingly connected to the convex ring, and the first sealing column and the convex ring form a second exhaust chamber.

[0007] Furthermore, a sealing gasket is provided at the lower end of the second sealing column, and a sealing protrusion protrudes from the opening end of the air inlet toward the sealing gasket. The sealing gasket and the sealing protrusion are sealed together, and the upper end surface of the sealing protrusion is an inclined surface.

[0008] Furthermore, a quantitative valve core is fixedly connected to the lower end of the second sealing column, the quantitative valve core is located in the middle of the sealing gasket, the quantitative holes are located on the quantitative valve core and the apertures of the quantitative holes are arranged from small to large.

[0009] Furthermore, the valve cover assembly includes a valve shell and a connecting seat, the connecting seat is fixedly arranged between the valve shell and the valve body, the upper end of the connecting seat is embedded in the valve shell, and the lower end is embedded in the valve body, the outer periphery of the connecting seat, the valve cover and the valve body form a first exhaust chamber, the lower end of the connecting seat, the valve body and the upper end of the piston form a first chamber, a spring is fixed between the lower end of the connecting seat and the upper end of the piston, and the valve shell and the connecting seat have a straight first air hole and an exhaust hole.

[0010] Furthermore, a mounting hole vertically connected to the first air hole is provided on the valve housing, and a manual starting device is fixedly provided in the mounting hole. The manual starting device includes a manual handle, a manual push rod and a manual valve core.

[0011] Furthermore, the valve body is provided with an inflation hole which is vertical and connected to the air inlet hole, the inflation hole is fixedly provided with an inflation nozzle, and the inflation nozzle is fixedly provided with a pressure display.

[0012] Furthermore, the electromagnetic drive device includes a moving iron core and a sealing gasket, the valve cover assembly has an exhaust boss protruding toward the sealing gasket, the exhaust boss surrounds the exhaust hole, and the sealing gasket can be close to or away from the exhaust boss.

[0013] Furthermore, the valve body is provided with a pressure relief hole which is vertical and connected to the air inlet hole, and the pressure relief hole is provided with a pressure relief valve.

[0014] Compared with the prior art, the technical effects of the present invention are as follows: 1. The present invention can be opened and closed multiple times through a cycle of static-start-close-static, saving time, increasing utilization rate and improving work efficiency. 2. The present invention is sensitive in the process of opening and closing, reducing waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the valve of the present invention in a closed state.

[0016] Figure 2 It is an enlarged view of point A of the present invention.

[0017] Figure 3 It is a cross-sectional view of the valve of the present invention in an open state.

[0018] Figure 4 It is an enlarged view of B of the present invention.

[0019] Figure 5 It is a sectional view of a manual starting device of the present invention.

[0020] Figure 6 It is a cross-sectional view of the pressure relief valve of the present invention.

[0021] Figure number marking: 1. Valve body; 101. Air inlet; 102. Air outlet; 103. Sealing convex block; 104. Air filling hole; 105. Pressure relief hole; 2. Valve cover assembly; 21. Valve shell; 22. Connecting seat; 201. First air hole; 202. Air exhaust hole; 203. Mounting hole; 204. Air exhaust boss; 3. Piston; 301. Dosing hole; 302. First sealing column; 303. Second sealing column; 304. Convex ring; 305. Sealing gasket; 306. Dosing valve core ; 4. First chamber; 5. First exhaust chamber; 6. Spring; 7. Electromagnetic drive device; 71. Moving iron core; 72. Sealing gasket; 8. Second chamber; 9. Second exhaust chamber; 10. Manual starting device; 1001. Manual handle; 1002. Manual push rod; 1003. Manual valve core; 11. Inflating nozzle; 12. Pressure display; 13. Pressure relief valve; 1301. First pad; 1302. Second pad; 1303. Sealing diaphragm; 1304. Pressure relief pad. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0023] It should be noted that the descriptions of the present invention regarding directions such as “up”, “down”, “left”, “right”, “top” and “bottom” are all defined based on the relationships between the orientations or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0024] according to Figures 1 to 6 As shown, a high-pressure multiple-start valve comprises a valve body 1 and a valve cover assembly 2 fixedly connected and a piston 3 arranged in the valve body 1. The valve cover assembly 2 is composed of a valve housing 21 and a connecting seat 22 arranged separately, and the valve housing 21 and the connecting seat 22 can also be integrally formed.

[0025] The valve body 1 is provided with an air inlet 101 and an air outlet 102, the air outlet 102 is vertically arranged at one end of the opening of the air inlet 101, and the piston 3 can block or open the air outlet 102. The air outlet 102 is located on the side of the piston 3, and when one end of the piston 3 abuts against the air inlet 101, the air outlet 102 can be completely blocked and the air inlet 101 can be partially blocked.

[0026] A first chamber 4 is formed between the lower end of the valve cover assembly 2, the inner periphery of the valve body 1 and the upper end of the piston 3, and a first exhaust chamber 5 is formed between the side of the valve cover assembly 2 and the valve body 1. A spring 6 is also provided between the valve cover assembly 2 and the piston 3. A metering hole 301 which is always connected to the air inlet hole 101 is provided in the piston 3. The metering hole 301 is always connected to the first chamber 4. A first air hole 201 which is always connected to the first chamber 4 is provided in the valve cover assembly 2. An electromagnetic drive device 7 is fixedly provided on the valve cover assembly 2. A second chamber 8 which is always connected to the first air hole 201 is provided between the valve cover assembly 2 and the electromagnetic drive device 7. An exhaust hole 202 is also provided on the valve cover assembly 2. The electromagnetic drive device 7 can block or open the exhaust hole 202. The exhaust hole 202 is always connected to the first exhaust chamber 5. The diameter of the exhaust hole 202 is larger than the diameter of the metering hole 301.

[0027] The piston 3 includes a first sealing column 302 and a second sealing column 303. The outer diameter of the first sealing column 302 is larger than the outer diameter of the second sealing column 303. A convex ring 304 protrudes inwardly from the inner wall of the valve body 1. The first sealing column 302 is in sealing and sliding connection with the inner wall of the valve body 1, and the second sealing column 303 is in sealing and sliding connection with the convex ring 304. The first sealing column 302 and the convex ring 304 form a second exhaust chamber 9, and the second exhaust chamber 9 is connected to the outside of the valve body 1 through a through hole. A sealing gasket 305 is provided at the lower end of the second sealing column 303, and a sealing protrusion 103 protrudes from the orifice end of the air inlet hole 101 toward the sealing gasket 305. The sealing gasket 305 is in sealing cooperation with the sealing protrusion 103. The upper end surface of the sealing protrusion 103 is an inclined surface. The second sealing column 303 has a fixedly connected lower end with a quantitative valve core 306 . The quantitative valve core 306 is located in the middle of the sealing gasket 305 . The quantitative holes 301 are located on the quantitative valve core 306 , and the apertures of the quantitative holes 301 are arranged from small to large.

[0028] Each time the valve is opened and closed, it is a cycle of static-start-return-static.

[0029] In the initial state, the electromagnetic drive device 7 blocks the exhaust hole 202, and the gas enters the first chamber 4 and the second chamber 8 through the quantitative hole 301. The air pressure in the first chamber 4, the second chamber 8 and the air inlet 101 is consistent. The cross-section of the sealing surface of the first sealing column 302 is the first force-bearing surface, and the cross-section of the sealing surface of the second sealing column 303 is the second force-bearing surface. The area of ​​the first force-bearing surface is larger than the area of ​​the second force-bearing surface. Under the action of the same high-pressure air pressure, the downward force exerted on the piston 3 is greater than the upward force exerted on the piston 3. Therefore, the sealing gasket 305 at the lower end of the piston 3 is pressed tightly against the air inlet 101, and the piston 3 completely blocks the air outlet 102. The quantitative valve core 306 is located in the middle of the sealing gasket 305 to keep the quantitative hole 301 always connected with the air inlet 101, thereby ensuring good sealing between the piston 3 and the air outlet 102, and ensuring that both the first chamber and the air inlet have high pressure. The initial state is the state when not in use. At this time, the spring 6 is close to the natural state. The valve cover assembly 2 and the piston 3 are not affected by the force of the spring 6 and maintain a balanced state for a long time, thereby extending the service life of the piston 3 and the valve cover assembly 2.

[0030] like Figure 1 and Figure 2 As shown, it is in the open state. When the electromagnetic drive device 7 is powered on, the electromagnetic drive device 7 opens the exhaust hole 202. The gas in the first chamber 4 and the second chamber 8 quickly enters the first exhaust chamber 5 through the exhaust hole 202 and is discharged. The first chamber 4 loses pressure quickly. Since the diameter of the exhaust hole 202 is larger than the diameter of the quantitative hole 301, the air pressure in the first chamber 4 is greater than the air pressure in the air inlet 101. The downward force on the piston 3 is smaller than the upward force on the piston 3. The piston 3 is pushed up to open the air outlet 102. The valve opens quickly. At this time, the spring 6 is compressed.

[0031] like Figure 3 and Figure 4 As shown, it is the return-to-close state. When the electromagnetic drive device 7 is powered off, the electromagnetic drive device 7 re-blocks the exhaust hole 202. At this time, the exhaust hole 202 is closed, and the pressure-loss state of the first chamber 4 is cancelled. When the first chamber 4 is still in the process of replenishing pressure, as long as the two ends of the piston 3 are close to each other, the piston 3 can quickly block the air outlet 102 under the action of the rebound force of the spring 6, without waiting for the air pressure in the first chamber 4 to rise to the same as the air pressure in the air inlet 101, so that the piston 3 blocks the air outlet 102. The whole process of returning to close takes about 1.5 seconds. The return to close is sensitive and reduces waste. After the piston 3 blocks the air outlet 102, the pressure in the first chamber 4 continues to rise. When the air pressure in the first chamber 4 and the second chamber 8 rises to the same as the air pressure in the air inlet 101, the valve returns to the static state.

[0032] The valve cover assembly 2 includes a valve housing 21 and a connecting seat 22. The connecting seat 22 is fixedly arranged between the valve housing 21 and the valve body 1. The upper end of the connecting seat 22 is embedded in the valve housing 21, and the lower end is embedded in the valve body 1. The connecting seat 22 is sealed and fixed to the valve housing 21 and the valve body 1. The outer periphery of the connecting seat 22, the valve cover and the valve body 1 form a first exhaust chamber 5. The lower end of the connecting seat 22, the valve body 1 and the upper end of the piston 3 form a first chamber 4. A spring 6 is fixed between the lower end of the connecting seat 22 and the upper end of the piston 3. The valve housing 21 and the connecting seat 22 have a straight first air hole 201 and an exhaust hole 202. The first air hole 201 is segmented in the valve housing 21 and the connecting seat 22. The exhaust hole 202 is segmented in the valve housing 21 and the connecting seat 22. The exhaust hole 202 located in the connecting seat 22 also has a transverse section that can communicate with the first exhaust chamber 5.

[0033] like Figure 5 As shown, the valve housing 21 is provided with a mounting hole 203 which is vertical and connected to the first air hole 201, and a manual starting device 10 is fixedly provided in the mounting hole 203, and the manual starting device 10 includes a manual handle 1001 and a manual valve core 1003. A manual push rod 1002 is provided between the manual handle 1001 and the manual valve core 1003, and the manual push rod 1002 drives the manual valve core 1003 to move inward by pressing the manual handle 1001, and the first air hole 201 is connected to the manual outlet, so that the first chamber 4 loses pressure quickly and opens the air outlet 102.

[0034] like Figure 6 As shown, the valve body 1 is provided with a pressure relief hole 105 which is vertical and connected to the air inlet hole 101, and a pressure relief valve 13 is fixedly installed in the pressure relief hole 105. The pressure relief valve 13 includes a first cushion block 1301 and a second cushion block 1302, a sealing diaphragm 1303 is fixedly arranged between the first cushion block 1301 and the second cushion block 1302, and the sealing diaphragm 1303 is located in the hollow between the first cushion block 1301 and the second cushion block 1302 and is in an arc shape, and a pressure relief cushion block 1304 is fixedly arranged outside the second cushion block 1302.

[0035] like Figure 1 , Figure 3 As shown, the valve body 1 is provided with an inflation hole 104 which is vertical and connected to the air inlet hole 101 , the inflation hole 104 is fixedly provided with an inflation nozzle 11 , and the inflation nozzle 11 is fixedly provided with a pressure display 12 .

[0036] The electromagnetic drive device 7 includes a moving iron core 71 and a sealing gasket 72. The valve cover assembly 2 has an exhaust boss 204 protruding toward the sealing gasket 72, and the exhaust boss 204 surrounds the exhaust hole 202. When the electromagnetic drive device 7 is powered on, the moving iron core 71 is electromagnetically attracted, and the moving iron core 71 drives the sealing gasket 72 to move upward away from the exhaust boss 204; when the electromagnetic drive device 7 is powered off, the moving iron core 71 drives the sealing gasket 72 to abut against the exhaust boss 204 to seal the exhaust hole 202.

[0037] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope defined by the claims of the present invention.

Claims

1. A high-pressure multiple-start valve, comprising a valve body (1) and a valve cover assembly (2) fixedly connected, wherein the valve body (1) is provided with an air inlet (101) and an air outlet (102), characterized in that: A piston (3) is provided in the valve body (1) and is sealingly and slidably connected to the valve body (1). An electromagnetic drive device (7) is fixedly provided on the valve cover assembly (2). The electromagnetic drive device (7) can drive the piston (3) to abut against or away from the air inlet (101) in multiple cycles to close or open the air outlet (102).

2. A high pressure multiple start valve according to claim 1, characterized in that: A first chamber (4) is formed between the lower end of the valve cover assembly (2), the inner periphery of the valve body (1) and the upper end of the piston (3); a first exhaust chamber (5) is formed between the side of the valve cover assembly (2) and the valve body (1); a spring (6) is further provided between the valve cover assembly (2) and the piston (3); a quantitative hole (301) which is always in communication with the air inlet hole (101) is provided in the piston (3); the quantitative hole (301) is always in communication with the first chamber (4); a first exhaust chamber (5) is provided in the valve cover assembly (2) A first air hole (201) is always connected to the first chamber (4); a second chamber (8) is always connected to the first air hole (201) and is arranged between the valve cover assembly (2) and the electromagnetic drive device (7); an exhaust hole (202) is also arranged on the valve cover assembly (2); the electromagnetic drive device (7) can block or open the exhaust hole (202); the exhaust hole (202) is always connected to the first exhaust cavity (5); and the diameter of the exhaust hole (202) is greater than the diameter of the quantitative hole (301).

3. A high pressure multiple start valve according to claim 2, characterized in that: The piston (3) comprises a first sealing column (302) and a second sealing column (303), the outer diameter of the first sealing column (302) being greater than the outer diameter of the second sealing column (303), a convex ring (304) protruding inwardly from the inner wall of the valve body (1), the first sealing column (302) being sealingly slidably connected to the inner wall of the valve body (1), the second sealing column (303) being sealingly slidably connected to the convex ring (304), and the first sealing column (302) and the convex ring (304) forming a second exhaust chamber (9).

4. A high pressure multiple start valve according to claim 3, characterized in that: A sealing gasket (305) is provided at the lower end of the second sealing column (303), and a sealing protrusion (103) protrudes from the opening end of the air inlet (101) toward the sealing gasket (305), and the sealing gasket (305) is in sealing cooperation with the sealing protrusion (103).

5. A high pressure multiple start valve according to claim 4, characterized in that: The lower end of the second sealing column (303) is fixedly connected with a quantitative valve core (306), the quantitative valve core (306) is located in the middle of the sealing gasket (305), the quantitative hole (301) is located on the quantitative valve core (306), and the aperture of the quantitative hole (301) is arranged from small to large.

6. A high pressure multiple start valve according to any one of claims 2 to 5, characterized in that: The valve cover assembly (2) comprises a valve housing (21) and a connecting seat (22); the connecting seat (22) is fixedly arranged between the valve housing (21) and the valve body (1); the upper end of the connecting seat (22) is embedded in the valve housing (21) and the lower end is embedded in the valve body (1); the outer periphery of the connecting seat (22) and the valve cover and the valve body (1) form a first exhaust cavity (5); the lower end of the connecting seat (22) and the valve body (1) and the upper end of the piston (3) form a first chamber (4); a spring (6) is fixed between the lower end of the connecting seat (22) and the upper end of the piston (3); and the valve housing (21) and the connecting seat (22) are provided with a first straight air hole (201) and an exhaust hole (202).

7. A high pressure multiple start valve according to claim 6, characterized in that: The valve housing (21) is provided with a mounting hole (203) which is vertical and connected to the first air hole (201), and a manual starting device (10) is fixedly arranged in the mounting hole (203). The manual starting device (10) includes a manual handle (1001), a manual push rod (1002) and a manual valve core (1003).

8. A high pressure multiple start valve according to claim 1, characterized in that: The valve body (1) is provided with an inflation hole (104) which is vertical and connected to the air inlet hole (101), an inflation nozzle (11) is fixedly provided on the inflation hole (104), and a pressure display (12) is fixedly provided on the inflation nozzle (11).

9. A high pressure multiple start valve according to claim 2, characterized in that: The electromagnetic drive device (7) comprises a moving iron core (71) and a sealing gasket (72); the valve cover assembly (2) has an exhaust boss (204) protruding toward the sealing gasket (72); the exhaust boss (204) surrounds the exhaust hole (202); and the sealing gasket (72) can be close to or away from the exhaust boss (204).

10. A high pressure multiple start valve according to claim 1, characterized in that: The valve body (1) is provided with a pressure relief hole (105) which is vertical and connected to the air inlet hole (101), and a pressure relief valve (13) is provided on the pressure relief hole (105).

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