High pressure multi-start valve

Abstract

The application provides a high-pressure multi-start valve, and belongs to the technical field of valves. The high-pressure multi-start valve solves the technical problems of the existing high-pressure multi-start valve, such as needing to replace a new sealing sheet and reinstalling to realize the second start. The high-pressure multi-start valve comprises a fixedly connected valve body and a valve cover assembly, the valve body is provided with an air inlet hole and an air outlet hole, the valve body is provided with a piston in sealing sliding connection with the valve body, the valve cover assembly is fixedly provided with an electromagnetic driving device, and the electromagnetic driving device can cyclically drive the piston to abut against or move away from the air inlet hole to close or open the air outlet hole. The application can be started and closed for multiple times through a cycle state of standing-starting-closing-standby, time is saved, the utilization rate is improved, and the work efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of valves, in particular to a high-pressure multi-start valve. BACKGROUND

[0002] The high-pressure multi-start valve is applied to the fire extinguishing agent bottle group of the fire extinguishing system. In the prior art, for example, a container valve disclosed in CN108488393A discloses that the lower end of the valve body is fixedly connected with the container, and when it is necessary to discharge the gas in the container, the electromagnetic power unit is controlled to work, and the electromagnetic power unit pushes down the push rod. The push rod slides downward, and the sealing sheet is pierced by the piercing needle. The gas in the container enters between the disc at the upper end of the piston rod and the starting seat through the channel in the piston rod. Since the force receiving 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 downward under the action of the gas pressure, and the gas between the disc and the cavity separation ring is compressed at the same time. At this time, the gas is discharged through the air vent. When the piston rod is lowered, the sealing ring on the plug separates from the annular protrusion. At this time, the gas in the container enters the cavity between the cavity separation ring and the plug through the gap between the sealing ring and the annular protrusion, and finally is discharged from the valve body through the interface. The sealing sheet of the container valve needs to be replaced and reinstalled after being pierced to realize the second start, which is inconvenient to operate. SUMMARY

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

[0004] The purpose of the present application can be achieved by the following technical scheme: a high-pressure multi-start valve, comprising a fixedly connected valve body and a valve cover assembly, the valve body is provided with an air inlet hole and an air outlet hole, and the valve body is provided with a piston in sealing sliding connection with the valve body, the valve cover assembly is fixedly provided with an electromagnetic drive device, and the electromagnetic drive device can drive the piston to close or open the air outlet hole multiple times in a cycle.

[0005] Further, the lower end of the valve cover assembly and the inner periphery of the valve body and the upper end of the piston form a first chamber, the side of the valve cover assembly and the valve body form a first exhaust chamber, a spring is further arranged between the valve cover assembly and the piston, a constant flow hole is arranged in the piston and always communicates with the air inlet hole, the constant flow hole always communicates with the first chamber, a first air passage is arranged in the valve cover assembly and always communicates with the first chamber, a second chamber is arranged between the valve cover assembly and the electromagnetic drive device and always communicates with the first air passage, an exhaust hole is further arranged on the valve cover assembly, the electromagnetic drive device can block or open the exhaust hole, the exhaust hole always communicates with the first exhaust chamber, and the diameter of the exhaust hole is greater than the diameter of the constant flow hole.

[0006] Further, the piston comprises a first sealing column and a second sealing column, the outer diameter of the first sealing column is larger than that of the second sealing column, the inner wall of the valve body is protruded inwardly with a convex ring, the first sealing column is in sealing sliding connection with the inner wall of the valve body, and the second sealing column is in sealing sliding connection with the convex ring, and the first sealing column and the convex ring form a second exhaust cavity.

[0007] Further, the lower end of the second sealing column is provided with a sealing washer, the orifice end of the air inlet hole is protruded with a sealing protrusion towards the sealing washer, the sealing washer is in sealing cooperation with the sealing protrusion, and the upper end surface of the sealing protrusion is an inclined surface.

[0008] Further, the lower end of the second sealing column is fixedly connected with a quantitative valve core, the quantitative valve core is located in the middle of the sealing washer, and the quantitative hole is located on the quantitative valve core and is provided with a hole diameter gradually increasing from small to large.

[0009] Further, the valve cover assembly comprises 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, the lower end of the connecting seat is embedded in the valve body, the outer periphery of the connecting seat forms the first exhaust cavity together with the valve cover and the valve body, the lower end of the connecting seat, the valve body and the upper end of the piston form the first cavity, the 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 are provided with the straight-through first air passing hole and the exhaust hole.

[0010] Further, the valve shell is provided with a mounting hole which is perpendicular to and communicates with the first air passing hole, and the mounting hole is fixedly provided with a manual starting device, and the manual starting device comprises a manual handle, a manual push rod and a manual valve core.

[0011] Further, the valve body is provided with a charging hole which is perpendicular to and communicates with the air inlet hole, and the charging hole is fixedly provided with a charging nozzle, and the charging nozzle is fixedly provided with a pressure display.

[0012] Further, the electromagnetic driving device comprises a moving iron core and a sealing gasket, the valve cover assembly is protruded with an exhaust boss towards the sealing gasket, the exhaust boss surrounds the exhaust hole, and the sealing gasket can abut against or be away from the exhaust boss.

[0013] Further, the valve body is provided with a pressure relief hole which is perpendicular to and communicates with 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 application are as follows: 1. The present application can be opened and closed for many times through a cycle state of standing-starting-reconnecting- standing, thereby saving time, improving the utilization rate and improving the work efficiency. 2. The present application is sensitive in the opening and reconnecting processes, and waste is reduced. BRIEF DESCRIPTION OF DRAWINGS

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

[0016] Figure 2 is an enlarged view of A in the present application.

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

[0018] Figure 4 is an enlarged view of B in the present application.

[0019] Figure 5 is a cross-sectional view of the manual starting device of the present application.

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

[0021] Figure No. Mark: 1, valve body; 101, air inlet hole; 102, air outlet hole; 103, sealing protrusion; 104, air charging hole; 105, pressure relief hole; 2, valve cover assembly; 21, valve shell; 22, connecting seat; 201, first air passage; 202, exhaust hole; 203, mounting hole; 204, exhaust protrusion; 3, piston; 301, metering hole; 302, first sealing column; 303, second sealing column; 304, protruding ring; 305, sealing washer; 306, metering 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, air charging 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 is a specific embodiment of the present application and further describes the technical solutions of the present application in conjunction with the drawings, but the present application is not limited to these embodiments.

[0023] It should be noted that the descriptions of the present application regarding "up", "down", "left", "right", "top", "bottom" and the like are defined based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device must be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0024] According to Figures 1 to 6 As shown in the figure, a high-pressure multi-start valve includes a fixedly connected valve body 1 and valve cover assembly 2, and a piston 3 arranged in the valve body 1. The valve cover assembly 2 is composed of a valve shell 21 and a connecting seat 22 arranged in a split manner, and the valve shell 21 and the connecting seat 22 can also be integrally formed.

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

[0026] The lower end of the valve cover assembly 2 and the inner wall of the valve body 1 and the upper end of the piston 3 form a first chamber 4, the side of the valve cover assembly 2 and the valve body 1 form a first exhaust chamber 5, and the valve cover assembly 2 and the piston 3 are further provided with a spring 6. The piston 3 is provided with a constant flow hole 301 which is always in communication with the air inlet hole 101, the constant flow hole 301 is always in communication with the first chamber 4, the valve cover assembly 2 is provided with a first air passage 201 which is always in communication with the first chamber 4, the valve cover assembly 2 is fixedly provided with an electromagnetic drive device 7, the valve cover assembly 2 and the electromagnetic drive device 7 are provided with a second chamber 8 which is always in communication with the first air passage 201, and the valve cover assembly 2 is further provided with an exhaust hole 202. The electromagnetic drive device 7 can block or open the exhaust hole 202, the exhaust hole 202 is always in communication with the first exhaust chamber 5, and the diameter of the exhaust hole 202 is greater than that of the constant flow 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 greater than that of the second sealing column 303, the inner wall of the valve body 1 is inwardly protruded with a convex ring 304, the first sealing column 302 is in sealing sliding connection with the inner wall of the valve body 1, and the second sealing column 303 is in sealing sliding connection with the convex ring 304. The first sealing column 302 and the convex ring 304 form a second exhaust chamber 9 which is in communication with the outside of the valve body 1 through a through hole. The lower end of the second sealing column 303 is provided with a sealing gasket 305, the hole opening end of the air inlet hole 101 is protruded with a sealing protrusion 103 towards the sealing gasket 305, and 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 lower end of the second sealing column 303 is fixedly connected with a constant flow valve core 306, the constant flow valve core 306 is located in the middle of the sealing gasket 305, the constant flow hole 301 is located on the constant flow valve core 306, and the hole diameter of the constant flow hole 301 is arranged from small to large.

[0028] The valve is in a cycle state of static state-starting-closing-returning to the static state each time.

[0029] In the initial state, the electromagnetic drive device 7 blocks the exhaust hole 202, the gas enters the first chamber 4 and the second chamber 8 through the quantitative hole 301, the gas pressure in the first chamber 4, the second chamber 8 and the air inlet hole 101 is consistent, the cross section of the sealing surface of the first sealing column 302 is the first force receiving surface, the cross section of the sealing surface of the second sealing column 303 is the second force receiving surface, the area of the first force receiving surface is larger than the area of the second force receiving surface, under the action of the same high pressure, the downward force on the piston 3 is greater than the upward force on the piston 3, so that the sealing washer 305 at the lower end of the piston 3 is tightly pressed on the air inlet hole 101, the piston 3 completely blocks the exhaust hole 102, and the quantitative valve core 306 is located in the middle of the sealing washer 305 to keep the quantitative hole 301 always in communication with the air inlet hole 101, so as to ensure the good sealing between the piston 3 and the exhaust hole 102, and ensure that the first chamber and the air inlet hole 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 are in a balanced state for a long time, thereby prolonging the service life of the piston 3 and the valve cover assembly 2.

[0030] As shown in Figure 1 and Figure 2 , it is 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 rapidly enters the first exhaust chamber 5 through the exhaust hole 202 and is discharged, the first chamber 4 rapidly loses pressure, because the diameter of the exhaust hole 202 is larger than the diameter of the quantitative hole 301, so the gas pressure in the first chamber 4 cannot rise to the same pressure as the air inlet hole 101, the downward force on the piston 3 is smaller than the upward force on the piston 3, and the piston 3 is lifted upward to open the exhaust hole 102. The valve opens quickly. At this time, the spring 6 is compressed.

[0031] As shown in Figure 3 and Figure 4 , it is the closing 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 piston 3 is close to the force on both ends during the pressure recovery process of the first chamber 4, the piston 3 can rapidly block the exhaust hole 102 under the action of the springback force of the spring 6, without waiting for the gas pressure in the first chamber 4 to rise to the same pressure as the air inlet hole 101 to make the piston 3 block the exhaust hole 102. The whole process of closing takes about 1.5 seconds. The closing is sensitive and reduces waste. After the piston 3 blocks the exhaust hole 102, the first chamber 4 continues to rise in pressure, and when the gas pressure in the first chamber 4 and the second chamber 8 rises to the same pressure as the air inlet hole 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 disposed 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 both 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 through first vent hole 201 and an exhaust hole 202. The first vent hole 201 is segmented within the valve housing 21 and the connecting seat 22. The exhaust hole 202 is segmented within the valve housing 21 and the connecting seat 22. The exhaust hole 202 located in the connecting seat 22 also has a transverse segment that connects to the first exhaust chamber 5.

[0033] like Figure 5 As shown, the valve housing 21 is provided with a vertical mounting hole 203 that connects to the first vent hole 201. A manual start device 10 is fixedly installed in the mounting hole 203. The manual start 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. Pressing the manual handle 1001 causes the manual push rod 1002 to drive the manual valve core 1003 to move inward, connecting the first vent hole 201 with the manual outlet, causing the first chamber 4 to quickly lose pressure and open the vent hole 102.

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

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

[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 towards the sealing gasket 72, surrounding the exhaust port 202. When the electromagnetic drive device 7 is energized, the moving iron core 71 is electromagnetically attracted, causing the sealing gasket 72 to move upwards away from the exhaust boss 204. When the electromagnetic drive device 7 is de-energized, the moving iron core 71 causes the sealing gasket 72 to press against the exhaust boss 204, sealing the exhaust port 202.

[0037] The above embodiments are only the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, and thus: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope defined by the claims of the present application.

Claims

1. A high-pressure, multi-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 inside the valve body (1) and is 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 come into contact with or move away from the air inlet (101) multiple times to close or open the air outlet (102). The lower end of the valve cover assembly (2) forms a first chamber (4) between the inner circumference of the valve body (1) and the upper end of the piston (3), and the side of the valve cover assembly (2) forms a first exhaust chamber (5) between the valve body (1). A spring (6) is also provided between the valve cover assembly (2) and the piston (3). A metering hole (301) that is always connected to the air inlet (101) is provided in the piston (3). The metering hole (301) is always connected to the first chamber (4). A starting spring (6) is provided in the valve cover assembly (2). The first vent (201) is connected to the first chamber (4). A second chamber (8) is provided between the valve cover assembly (2) and the electromagnetic drive device (7) and is always connected to the first vent (201). The valve cover assembly (2) is also provided with an exhaust hole (202). 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).

2. The high-pressure multiple-start valve according to claim 1, characterized in that: 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 inward from the inner wall of the valve body (1). The first sealing column (302) is in a sealing sliding connection with the inner wall of the valve body (1), and the second sealing column (303) is in a sealing sliding connection with the convex ring (304). The first sealing column (302) and the convex ring (304) form a second exhaust chamber (9).

3. The high-pressure multiple-start valve according to claim 2, characterized in that: The lower end of the second sealing column (303) is provided with a sealing gasket (305), and the opening end of the air inlet (101) protrudes towards the sealing gasket (305) with a sealing protrusion (103), and the sealing gasket (305) and the sealing protrusion (103) are sealed together.

4. A high-pressure multiple-start valve according to claim 3, characterized in that: The lower end of the second sealing column (303) is fixedly connected to a metering valve core (306). The metering valve core (306) is located in the middle of the sealing gasket (305). The metering hole (301) is located on the metering valve core (306) and the diameter of the metering hole (301) is set from small to large.

5. A high-pressure multiple-start valve according to any one of claims 1 to 4, characterized in that: The valve cover assembly (2) includes a valve housing (21) and a connecting seat (22). The connecting seat (22) is fixedly disposed 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) forms a first exhaust chamber (5) with the valve cover and the valve body (1). The lower end of the connecting seat (22) forms a first chamber (4) with the valve body (1) and the upper end of the piston (3). 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 passage (201) and an exhaust hole (202).

6. A high-pressure multiple-start valve according to claim 5, characterized in that: The valve housing (21) is provided with a vertical mounting hole (203) that connects to the first air passage (201). A manual start device (10) is fixedly installed in the mounting hole (203). The manual start device (10) includes a manual handle (1001), a manual push rod (1002), and a manual valve core (1003).

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

8. A high-pressure multiple-start valve according to claim 1, characterized in that: 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). The exhaust boss (204) surrounds the exhaust hole (202). The sealing gasket (72) can abut against or move away from the exhaust boss (204).

9. 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) that is vertical and connected to the air inlet (101), and a pressure relief valve (13) is provided on the pressure relief hole (105).

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