Bottle valve

Abstract

The invention discloses a bottle head valve, belongs to the technical field of valve body structures, and is used for providing the bottle head valve which is light and convenient to operate, safe and high in benefit. The bottle head valve comprises a valve body, one end of the valve body is an air inlet end, the other end of the valve body is provided with a pressing cap, and the side face of the valve body is provided with an air outlet end; the space, located between the pressing cap and the piston, in the valve body is an air chamber, the piston is located between the air chamber and the air inlet end, and when the pressure in the air chamber is larger than the pressure in the air inlet end and the pressure in the air outlet end at the same time, the piston separates the air inlet end from the air outlet end. When the pressure in the air inlet end or the air outlet end is larger than that in the air chamber, the piston leaves the limiting position of the step face of the inner wall of the valve body to enable the air inlet end to be communicated with the air outlet end, a first valve core is arranged in the pressing cap, and a starting device is arranged at the upper end of the pressing cap to control opening and closing of the first valve core. The valve core and the starting device are arranged in the pressing cap, so that the valve core automatically resets after acting and does not need to be replaced after the diaphragm is punctured, and operation is simplified.

Description

Technical Field

[0001] The present application relates to the technical field of valve body structures, and in particular to a bottle head valve. Background Art

[0002] The release of fire extinguishing gas needs to be controlled by a valve body structure, such as a bottle head valve. The bottle head valves currently on the market are composed of a valve body, a piston, a safety pressure ring assembly, a starting device, a seal, a pressure gauge interface, etc., and most of the bottle head valves are internal pressure storage type. When the pressure gauge interface is used as a filling port, the filling interface can be controlled by tightening or loosening the nut. Due to the small diameter of the pressure gauge interface, filling the fire extinguishing gas is slow and inconvenient;

[0003] On the other hand, the existing bottle head valve opening methods can be roughly divided into electric, pneumatic and manual. Most bottle head valves need to replace the punctured diaphragm and manually reset after opening, which is inconvenient to operate;

[0004] Also, after the container is filled, if an accident occurs during transportation, installation, or maintenance, causing the valve to open, the fire extinguishing agent will be sprayed with a certain impact force, which is unsafe for the environment and people. Summary of the invention

[0005] The purpose of the present application is to provide a bottle head valve which is easy to operate, safe and highly efficient.

[0006] In order to achieve the above purpose, the present application provides a bottle head valve: comprising a valve body, one end of the valve body is an air inlet end, the other end is provided with a pressure cap, the side of the valve body has an air outlet end, the interior of the valve body is provided with a piston, the space between the pressure cap and the piston inside the valve body is an air chamber, the piston is located between the air chamber and the air inlet end, when the pressure in the air chamber is greater than the pressure in both the air inlet end and the air outlet end, the piston separates the air inlet end from the air outlet end; when the pressure in the air inlet end or the air outlet end is greater than the pressure in the When the pressure in the air chamber is high, the piston leaves the restricted position of the stepped surface of the valve body wall, so that the air inlet end is connected with the air outlet end. A first valve core is arranged in the pressure cap, and a starting device is also arranged on the upper end of the pressure cap, which is suitable for controlling the opening and closing of the first valve core. A detachable locking device is arranged on the side wall of the valve body, and the installation direction of the locking device determines whether the piston can move. A safety component is also arranged on the side wall of the valve body, which is suitable for automatically releasing pressure when the pressure in the container bottle is too high, thereby reducing the probability of damage to the container bottle.

[0007] As a preferred embodiment, a locking groove is provided on the outer side surface of the piston, which is suitable for communicating with the air outlet end. The end of the piston facing away from the pressure cap is fixedly connected with a seal by a tightening bolt. The seal is annular and suitable for close contact with the stepped surface of the inner wall of the valve body. An outer ring groove is provided on the outer side surface of one end of the piston close to the pressure cap. The piston is provided with a movable sealing ring in the outer ring groove, which is suitable for ensuring the sealing of the interior of the air chamber, so that the valve body can maintain a stable closed state for a long time when not working.

[0008] As a preferred embodiment, the side wall of the valve body is provided with a first pressure gauge hole and a second pressure gauge hole, the first pressure gauge hole is always connected to the air inlet end, and the valve body is fixedly connected to a first pressure gauge via the first pressure gauge hole; the second pressure gauge hole is always connected to the air outlet end, and the valve body is fixedly connected to a second pressure gauge via the second pressure gauge hole for monitoring the air pressure changes inside the valve body.

[0009] Preferably, the valve body is provided with an air leakage hole between the air inlet end and the piston, and the valve body is fixedly connected with a second valve core (10) in the air leakage hole, so as to conveniently release excess gas in the container.

[0010] As a preferred embodiment, the pressure cap includes a sealing cover fixedly connected to the valve body, the sealing cover includes an integrated outer screw sleeve and an inner screw stem, the outer screw sleeve is threadedly connected to the valve body, and the first valve core is fixedly connected to the outer screw sleeve and the center of the inner screw stem; the inner screw stem is threadedly connected to an end cover, the outer side surface of the end cover is provided with a friction groove, and an exhaust hole penetrating the inner wall, the starting device adopts an electric telescopic rod, and the shell of the electric telescopic rod is fixedly connected to the center of the end cover; the inner wall of the outer screw sleeve is provided with a side ring groove, which is suitable for configuring a third sealing ring, and the inner top surface of the sealing cover is provided with an end face ring groove, which is suitable for configuring a fourth sealing ring, thereby further improving the air tightness of the upper end of the air chamber.

[0011] As a preferred embodiment, a buffer cavity is provided on the outer side surface of the valve body, the safety component includes an elastic ring and a safety diaphragm arranged in the buffer cavity, and a safety bolt partially located in the buffer cavity, the safety bolt includes an inner threaded sleeve mating with the thread of the buffer cavity, the safety diaphragm is suitable for being compressed between the elastic ring and the inner threaded sleeve, the part of the inner threaded sleeve located outside the buffer cavity is provided with an air vent penetrating the inner and outer walls, and the end face of the air inlet end is provided with a pressure relief hole connected to the buffer cavity, which is used to guide excess gas in the container to the outside.

[0012] As a preferred embodiment, the inner wall of the air inlet end is provided with an inner annular groove, the air inlet end is provided with a first sealing ring in the inner annular groove, the air inlet end is provided with an inner screw hole penetrating the inner and outer walls between the piston and the first sealing ring, the air inlet end is threadedly connected with a set screw in the inner screw hole; the outer side surface of the air inlet end has an external thread, the outer side surface of the valve body has a limiting edge, and the valve body is outer-mounted with a second sealing ring located between the limiting edge and the external thread of the air inlet end, so as to further improve the air tightness of the connection between the valve body and the bottle mouth of the container bottle.

[0013] As a preferred embodiment, a lock tongue cavity is formed in the side wall of the valve body, and the locking device is installed in the lock tongue cavity. The locking device comprises a screw, and the main body of the screw is a lock shaft suitable for engaging with the lock groove. The end of the lock shaft has a first threaded section, and a retaining ring is fixedly connected to the end of the first threaded section, and a clamping ring is provided on the portion between the retaining ring and the first threaded section, and the end of the retaining ring has an optical axis, and a fixed sealing ring is outerly provided on the optical axis, and the end of the optical axis has a third threaded section, and the first threaded section and the third threaded section are respectively suitable for cooperating with the inner wall thread of the lock tongue cavity, and the two cooperating states of the screw correspond to the two working states of locking and releasing of the locking device.

[0014] As a preferred embodiment, the end of the retaining ring opposite to the first thread segment has a second thread segment, the external thread of the second thread segment is equipped with a tightening nut, and a nameplate is also sleeved on the outside of the second thread segment, and the tightening nut is suitable for pressing the nameplate against the end face of the retaining ring through the clamping ring, the end face of the nameplate opposite to the first thread segment is green, and the end face of the nameplate opposite to the third thread segment is red, which directly indicates the working status of the bottle valve.

[0015] As a preferred embodiment, the outer side surface of the valve body extends outward along the lock tongue cavity to form a tubular shape, and the valve body is fixedly connected to a sensing signal device on the extension tube, which is suitable for detecting the installation direction of the locking device. The first pressure gauge and the second pressure gauge are both electronic and connected to the sensing signal device by wires, which are suitable for remote monitoring and can be centrally monitored, further improving the monitoring efficiency and safety.

[0016] Compared with the prior art, the beneficial effects of this application are:

[0017] (1) The present invention arranges a valve core and a starting device in the pressure cap, so that the valve core automatically resets after actuation, and does not need to be replaced like a diaphragm that needs to be punctured, thereby simplifying the operation process;

[0018] (2) The present invention can be filled through the gas outlet, which is more convenient and quick when filling the fire extinguishing agent gas, making the filling operation more efficient;

[0019] (3) The present invention provides a locking device on the valve body, which can improve the safety factor of the bottle head valve during transportation, installation and maintenance.

[0020] (4) The present invention can remotely monitor whether the bottle head valve enters the normal working state by arranging a sensing signal device on the locking device and utilizing the signal output;

[0021] (5) A siphon tube can be installed at the air inlet end of the cylinder head valve, which is suitable for internal and external pressure storage type HFC-227ea gas fire extinguishing systems and has higher adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the first stereoscopic schematic diagram of the overall structure of the bottle head valve.

[0023] Figure 2 This is the second stereoscopic schematic diagram of the overall structure of the bottle head valve.

[0024] Figure 3 This is a plan cross-sectional view of the first installation state of the locking device of the bottle head valve.

[0025] Figure 4 It is a plan cross-sectional view of the second installation state of the locking device of the bottle head valve.

[0026] Figure 5 It is a lateral plan cross-sectional view of the bottle head valve.

[0027] Figure 6 It is a first three-dimensional structural schematic diagram of the locking device of the bottle head valve.

[0028] Figure 7 It is a second three-dimensional structural schematic diagram of the locking device of the bottle head valve.

[0029] Figure 8 It is a plan cross-sectional view of the locking device of the bottle head valve.

[0030] Fig. 9 It is a sectional view of the three-dimensional structure of the piston of the bottle head valve.

[0031] Fig.10 It is a sectional view of the three-dimensional structure of the pressure cap of the bottle head valve.

[0032] Fig.11 It is a first three-dimensional structural sectional view of the valve body of the bottle head valve.

[0033] Fig.12 It is a second three-dimensional structural sectional view of the valve body of the bottle head valve.

[0034] Fig.13 It is a plan cross-sectional view of the safety component of the bottle head valve.

[0035] Fig.14It is a schematic diagram of the three-dimensional structure of the end cover of the bottle head valve.

[0036] In the figure: 1. pressure cap; 110. sealing cover; 111. outer screw sleeve; 112. inner screw handle; 113. side ring groove; 114. end ring groove; 120. end cover; 121. friction groove; 122. exhaust hole; 103. first valve core; 104. starting device; 2. valve body; 210. air inlet end; 211. inner screw hole; 212. pressure release hole; 213. limiting edge; 214. inner ring groove; 202. air outlet end; 203. lock tongue cavity; 204. buffer cavity; 205. first pressure gauge hole; 206. second pressure gauge hole; 207. air release hole; 208. air chamber; 3. locking device; 310. screw rod; 311. lock shaft; 312. first thread segment; 313. second thread segment; 314, retaining ring; 315, optical axis; 316, third threaded section; 302, nameplate; 303, clamping ring; 304, tightening nut; 305, fixed sealing ring; 4, safety component; 401, elastic ring; 402, safety diaphragm; 430, safety bolt; 431, inner thread sleeve; 432, air vent; 5, piston; 501, locking groove; 502, sealing element; 503, outer ring groove; 504, movable sealing ring; 505, clamping bolt; 601, first barometer; 602, second barometer; 7, induction signal device; 8, set screw; 901, first sealing ring; 902, second sealing ring; 903, third sealing ring; 904, fourth sealing ring; 10, second valve core. DETAILED DESCRIPTION

[0037] 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.

[0038] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating 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, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0039] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0040] The terms "including" and "having" and any variations thereof in the specification and claims of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0041] like Figure 1-14 The bottle head valve shown in the figure comprises a valve body 2 made of corrosion-resistant material, one end of the valve body 2 is an air inlet end 210, and the other end is provided with a pressure cap 1, the side of the valve body 2 also has an air outlet end 202, a piston 5 is provided inside the valve body 2, the piston 5 is constrained by the inner wall of the valve body 2 and can only move along the axis of the valve body 2, the space between the pressure cap 1 and the piston 5 inside the valve body 2 is an air chamber 208 for storing gaseous fluid, the piston 5 is located between the air chamber 208 and the air inlet end 210, a locking groove 501 is provided on the outer side of the piston 5, the locking groove 501 is an annular shape coaxial with the piston 5, and can be communicated with the air outlet end 202, the end of the piston 5 facing away from the pressure cap 1 is fixedly connected with a sealing member 502 through a clamping bolt 505, the sealing member 502 is annular and is used to be in close contact with the stepped surface of the inner wall of the valve body 2, as shown in the attached figure. Figure 3 and attached Figure 4 It can be seen that the concave portion of the stepped surface inside the valve body 2 is not released from the sealing member 502, and the concave portion of the stepped surface is always connected to the inner wall of the outlet end 202, while the upper end of the piston 5 is kept flush with the inner wall of the valve body 2, so the pressure on the lower end of the piston 5 can be greater than the pressure on the upper end of the piston 5; the outer side surface of the end of the piston 5 close to the pressure cap 1 is provided with an outer ring groove 503, and the piston 5 is provided with a movable sealing ring 504 in the outer ring groove 503 to ensure the internal sealing of the air chamber 208. When the pressure in the air chamber 208 is greater than that at the inlet end 210 and the outlet end 20 2, the sealing member 502 of the piston 5 contacts with the stepped surface of the inner wall of the valve body 2 to form an annular sealing surface, thereby completely isolating the air inlet end 210 from the air outlet end 202. At this time, the bottle head valve is in an open state, and gas cannot be exhausted to the outside, nor can gas be injected into the inside. When the pressure in the air inlet end 210 or the air outlet end 202 is greater than the pressure in the air chamber 208, the piston 5 will leave the restricted position of the stepped surface of the inner wall of the valve body 2, so that the air inlet end 210 is connected with the air outlet end 202. At this time, the bottle head valve is in a closed state, and gas can be exhausted to the outside, or gas can be injected into the inside.

[0042] The side wall of the valve body 2 is provided with a first pressure gauge hole 205 and a second pressure gauge hole 206 which penetrate the inner and outer walls, wherein the first pressure gauge hole 205 is always connected to the air inlet end 210, and the valve body 2 is fixedly connected to a first air pressure gauge 601 through the first pressure gauge hole 205, so that the first air pressure gauge 601 can monitor the air pressure state in the container bottle connected to the air inlet end 210; the second pressure gauge hole 206 is always connected to the air outlet end 202 through the annular locking groove 501 ... the first air pressure gauge 601 through the second pressure gauge hole 205. The pressure gauge hole 206 is fixedly connected to a second pressure gauge 602, so the second pressure gauge 602 can be used to monitor the internal pressure state of an external pipeline connected to the outlet end 202. The valve body 2 is provided with a vent hole 207 between the air inlet end 210 and the piston 5. The valve body 2 is fixedly connected to a second valve core 10 in the vent hole 207. When the first pressure gauge 601 shows that the pressure is too high, some of the gas in the gas cylinder can be discharged by pressing the second valve core 10, thereby improving storage safety.

[0043] A first valve core 103 is arranged in the pressure cap 1, and gas can be injected into the air chamber 208 through the first valve core 103. A starting device 104 is also arranged on the upper end of the pressure cap 1 for controlling the opening and closing of the automatic first valve core 103. The pressure cap 1 includes a cover 110 fixedly connected to the valve body 2, and the cover 110 includes an integral outer screw sleeve 111 and an inner screw handle 112, wherein the outer screw sleeve 111 is threadedly connected to the valve body 2 and has good air tightness. The first valve core 103 is fixedly connected to the central through hole of the outer screw sleeve 111 and the inner screw handle 112; the inner screw handle 112 is threadedly connected to the end cover 120, and the outer side surface of the end cover 120 is provided with a friction groove 121 for easy rotation. The end cover 120 can be tightened and loosened, and the side wall of the end cover 120 is also provided with an exhaust hole 122 that passes through the inner wall, and the gas entering the end cover 120 is discharged therefrom. The starting device 104 generally adopts a small electric telescopic rod with high control accuracy. The shell of the electric telescopic rod is fixedly connected to the center of the end cover 120, and the movable end of the electric telescopic rod is aligned with the pressable end of the first valve core 103; the inner wall of the outer screw sleeve 111 is provided with a side annular groove 113 for configuring the third sealing ring 903, and the inner top surface of the cover 110 is provided with an end face annular groove 114 for configuring the fourth sealing ring 904, forming two circles of sealing annular surfaces, further improving the air tightness of the upper end of the air chamber 208.

[0044] The side wall of the valve body 2 is provided with a detachable fixed locking device 3, and the installation direction of the locking device 3 determines whether the piston 5 can move. Specifically: the side wall of the valve body 2 is provided with a lock tongue cavity 203, and the locking device 3 is installed in the lock tongue cavity 203. The specific structure of the locking device 3 includes a screw 310, and the main part of the screw 310 is a lock shaft 311. Only the lock shaft 311 can engage with the lock groove 501. The end of the lock shaft 311 has a first threaded section 312, and the first threaded section 312 has an external thread. The end of the first threaded section 312 is fixedly connected with a retaining ring 314, and the retaining ring 314 is the part with the largest diameter on the entire screw 310. The part between the retaining ring 314 and the first threaded section 312 is provided with a clamping ring 303 made of rubber. The end of the retaining ring 314 has an optical axis 315, and the outer sleeve of the optical axis 315 is provided with a fixed sealing ring 305, which is actually an O-ring. The first thread segment 312 and the third thread segment 316 can respectively cooperate with the inner wall thread of the lock tongue cavity 203, that is to say, at the same time, either the first thread segment 312 cooperates with the lock tongue cavity 203, or the third thread segment 316 cooperates with the lock tongue cavity 203, and the retaining ring 314 has a second thread segment 313 at one end opposite to the first thread segment 312, and the second thread segment 313 is externally threaded with a tightening nut 304, and a label 302 is also sleeved on the outside of the second thread segment 313, and the tightening nut 304 presses the label 302 on the end face of the retaining ring 314 through the clamping ring 303, and all parts of the entire screw rod 310 are coaxial, and the first thread segment 312 is disconnected from the second thread segment 313 at the beginning, and after the clamping ring 303 and the tightening nut 304 are sleeved on the second thread segment 313, the second thread segment 313 and the first thread segment 312 are hot-melted or welded together again.

[0045] The end face of the label 302 facing the first threaded section 312 is green. When this face faces outward, it indicates that the bottle head valve has been unlocked and can be operated to open. The end face of the label 302 facing the third threaded section 316 is red. When this face faces outward, it indicates that the bottle body valve is locked and operation is prohibited. The outer side surface of the valve body 2 extends outward along the lock tongue cavity 203 to form a tube, providing more installation space for the locking device 3. The valve body 2 is fixedly connected to the extension tube with a sensing signal device 7. The sensing signal device 7 has a probe at the end of the screw 310. Since the distance between the probe and the outer side surface of the screw 310 is different for different installation directions of the screw 310, the installation direction of the locking device 3 can be determined by detection. On the other hand, the first pressure gauge 601 and the second pressure gauge 602 are also electronic and connected to the sensing signal device 7 by wires, thereby realizing remote monitoring. Remote centralized monitoring is performed through programs, which effectively improves supervision efficiency and safety.

[0046] The side wall of the valve body 2 is also provided with a safety component 4, which can automatically release the pressure when the pressure in the container bottle is too high. Specifically, a buffer cavity 204 is provided on the outer side of the valve body 2, and the buffer cavity 204 is not directly connected to the inner cavity of the valve body 2. The specific structure of the safety component 4 includes an elastic ring 401 and a safety diaphragm 402 arranged in the buffer cavity 204, and a safety bolt 430 partially located in the buffer cavity 204. The safety bolt 430 includes an inner screw sleeve 431 that is threadedly matched with the buffer cavity 204. The safety component 404 is provided with a safety diaphragm 402, and the safety diaphragm 402 is provided in the buffer cavity 204. The diaphragm 402 is just compressed between the elastic ring 401 and the inner screw sleeve 431. The safety diaphragm 402 is generally made of a metal sheet with a certain thickness and can withstand a specific gas pressure. When the gas pressure exceeds the specific value, the safety diaphragm 402 will deform and rupture. The elastic ring 401 is made of soft and elastic rubber or silicone material to prevent gas from overflowing from the matching gap. The inner screw sleeve 431 is located outside the buffer cavity 204 and has a gas vent 432 that penetrates the inner and outer walls. The gas is discharged from this, and a pressure relief hole 212 connected to the buffer chamber 204 is provided on the end face of the air inlet end 210, so that the buffer chamber 204 can be directly connected to the inside of the container bottle through the pressure relief hole 212. An inner ring groove 214 is provided on the inner wall of the air inlet end 210. The air inlet end 210 is provided with a first sealing ring 901 in the inner ring groove 214, which is used to be sleeved on the outside of the hard siphon tube to form an annular airtight surface. The air inlet end 210 is also provided with an inner screw hole 211 that passes through the inner and outer walls between the piston 5 and the first sealing ring 901. The air end 210 is threadedly connected with a set screw 8 in the inner thread hole 211 for fixing the hard siphon tube inserted into the air inlet end 210; the outer side surface of the air inlet end 210 has an external thread for cooperating with the bottle mouth of the container bottle, and the outer side surface of the valve body 2 has a limiting edge 213 for limiting the maximum matching depth between the valve body 2 and the bottle mouth of the container bottle, and the outer sleeve of the valve body 2 is provided with a second sealing ring 902 located between the limiting edge 213 and the external thread of the air inlet end 210, so as to further improve the air tightness after the air inlet end 210 is matched with the bottle mouth of the container bottle.

[0047] Working principle: A siphon tube that is not easily deformed by pressure can be inserted into the air inlet end 210 of the bottle head valve, and the set screw 8 can be tightened to install it on the fire extinguishing agent container. When the container is filled with fire extinguishing agent, the locking device 3 is pressed. Figure 4 As shown in the installation, the outer side of the on-site sign 302 is displayed in green, and the induction signal device 7 also has a signal output. The gas outlet 202 of the valve body 2 can be selected as the filling port. When the gas outlet 202 is filled with fire extinguishing agent, the piston 5 is pressed upward by the fire extinguishing agent gas. At this time, the valve is opened. After the fire extinguishing agent fills the container, since the fire extinguishing agent pressure in the valve body 2 acts the same on the upper and lower parts of the piston 5, the piston 5 cannot automatically close the valve. It is necessary to inflate and pressurize the first valve core 103 at the pressure cap 1 to increase the pressure in the air chamber 208. The piston 5 will move down under the action of the upper and lower pressure difference to close the valve, and finally the fire extinguishing agent can be dispersed.

[0048] When the bottle head valve is in the state of transportation, installation or maintenance, remove the locking device 3 and press Figure 3 As shown in the installation, the end of the lock shaft 311 of the screw 310 in the locking device 3 is pressed against the piston 5 in the valve body 2, the outer side of the on-site sign 302 is displayed in red, and the sensor signal device 7 has no signal output. At this time, the valve cannot work normally. In fact, the valve is in a closed state and cannot be opened normally.

[0049] After the fire extinguisher container is installed, the locking device 3 needs to be pressed Figure 4 As shown in the figure, the installation is completed, the on-site sign 302 is displayed in green, and the induction signal device 7 also has a signal output. When extinguishing a fire, the starting device 104 on the pressure cap 1 is actuated, and the movable end of the starting device 104 pushes the first valve core 103 at the pressure cap 1, and the gas in the air chamber 208 is released from the first valve core 103, and the gas pressure in the air chamber 208 is reduced accordingly, and the upper and lower pressure differences of the piston 5 are changed. Under the pressure of the gas in the container, the piston 5 is pushed upward, the valve is opened, and the fire extinguishing gas flows from the air inlet end 210 through the valve to the air outlet end 202, and the fire extinguishing gas can be released;

[0050] When an accident occurs to the starting device 104 on the pressing cap 1, the end cover 120 can be unscrewed, and the first valve core 103 at the pressing cap 1 can be manually pushed open, and the gas in the air chamber 208 is also released from the first valve core 103, and the gas pressure in the air chamber 208 is reduced accordingly, which also changes the upper and lower pressure difference of the piston 5. Under the action of the gas pressure in the container, the piston 5 is pushed upward, the valve opens, and the fire extinguishing gas flows from the valve through the air inlet end 210 to the air outlet end 202 to release and extinguish the fire.

[0051] 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 by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these 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 attached claims and their equivalents.

Claims

1. A bottle head valve, characterized in that: The invention comprises a valve body (2), one end of the valve body (2) is an air inlet end (210), and the other end is provided with a pressure cap (1), the side of the valve body (2) has an air outlet end (202), a piston (5) is provided inside the valve body (2), the space inside the valve body (2) between the pressure cap (1) and the piston (5) is an air chamber (208), the piston (5) is located between the air chamber (208) and the air inlet end (210), when the pressure inside the air chamber (208) is greater than the pressure inside the air inlet end (210) and the air outlet end (202), the piston (5) separates the air inlet end (210) from the air outlet end (202); when the air inlet end (210) or the air outlet end (202) is When the pressure in (202) is greater than the pressure in the air chamber (208), the piston (5) leaves the restricted position of the stepped surface of the inner wall of the valve body (2), so that the air inlet end (210) is connected to the air outlet end (202). A first valve core (103) is arranged in the pressure cap (1), and a starting device (104) is also arranged at the upper end of the pressure cap (1), which is suitable for controlling the opening and closing of the first valve core (103). A detachable locking device (3) is arranged on the side wall of the valve body (2), and the installation direction of the locking device (3) determines whether the piston (5) can move. A safety component (4) is also arranged on the side wall of the valve body (2), which is suitable for automatically releasing pressure when the pressure in the container bottle is too high.

2. The bottle head valve according to claim 1, characterized in that: The outer side surface of the piston (5) is provided with a locking groove (501) suitable for communicating with the air outlet end (202); the end of the piston (5) facing away from the pressure cap (1) is fixedly connected with a sealing member (502) via a clamping bolt (505); the sealing member (502) is annular and suitable for close contact with the stepped surface of the inner wall of the valve body (2); the outer side surface of the end of the piston (5) close to the pressure cap (1) is provided with an outer ring groove (503); the piston (5) is provided with a movable sealing ring (504) in the outer ring groove (503) suitable for ensuring the internal sealing of the air chamber (208).

3. The bottle head valve according to claim 2, characterized in that: The side wall of the valve body (2) is provided with a first pressure gauge hole (205) and a second pressure gauge hole (206); the first pressure gauge hole (205) is always connected to the air inlet end (210), and the valve body (2) is fixedly connected to a first air pressure gauge (601) via the first pressure gauge hole (205); the second pressure gauge hole (206) is always connected to the air outlet end (202), and the valve body (2) is fixedly connected to a second air pressure gauge (602) via the second pressure gauge hole (206).

4. The bottle head valve according to claim 3, characterized in that: The valve body (2) is provided with an air leakage hole (207) between the air inlet end (210) and the piston (5), and the valve body (2) is fixedly connected with a second valve core (10) in the air leakage hole (207).

5. The bottle head valve according to claim 4, characterized in that: The pressure cap (1) comprises a sealing cover (110) fixedly connected to the valve body (2), the sealing cover (110) comprising an integral outer screw sleeve (111) and an inner screw stem (112), the outer screw sleeve (111) being threadedly connected to the valve body (2), the first valve core (103) being fixedly connected to the center of the outer screw sleeve (111) and the inner screw stem (112); the outer side of the inner screw stem (112) is threadedly connected to an end cover (120), the end cover (120) ) is provided with a friction groove (121) on the outer side surface and an exhaust hole (122) penetrating the inner wall; the starting device (104) adopts an electric telescopic rod, and the shell of the electric telescopic rod is fixedly connected to the center of the end cover (120); the inner wall of the outer screw sleeve (111) is provided with a side ring groove (113) suitable for arranging a third sealing ring (903); the inner top surface of the sealing cover (110) is provided with an end face ring groove (114) suitable for arranging a fourth sealing ring (904).

6. The bottle head valve according to any one of claims 1 to 5, characterized in that: The outer side surface of the valve body (2) is provided with a buffer cavity (204); the safety component (4) comprises an elastic ring (401) and a safety diaphragm (402) arranged in the buffer cavity (204), and a safety bolt (430) partially located in the buffer cavity (204); the safety bolt (430) comprises an inner thread sleeve (431) threadedly matched with the buffer cavity (204); the safety diaphragm (402) is suitable for being compressed between the elastic ring (401) and the inner thread sleeve (431); a portion of the inner thread sleeve (431) located outside the buffer cavity (204) is provided with an air release port (432) penetrating the inner and outer walls; and the end surface of the air inlet end (210) is provided with a pressure relief hole (212) connected with the buffer cavity (204).

7. The bottle head valve according to claim 6, characterized in that: The inner wall of the air inlet end (210) is provided with an inner annular groove (214), and the air inlet end (210) is provided with a first sealing ring (901) in the inner annular groove (214). The air inlet end (210) is provided with an inner threaded hole (211) penetrating the inner and outer walls between the piston (5) and the first sealing ring (901), and the air inlet end (210) is threadedly connected with a set screw (8) in the inner threaded hole (211); the outer side surface of the air inlet end (210) has an external thread, and the outer side surface of the valve body (2) has a limiting edge (213), and the outer cover of the valve body (2) is provided with a second sealing ring (902) located between the limiting edge (213) and the external thread of the air inlet end (210).

8. The bottle head valve according to any one of claims 3 to 5, characterized in that: The side wall of the valve body (2) is provided with a lock tongue cavity (203), the locking device (3) is installed in the lock tongue cavity (203), the locking device (3) comprises a screw rod (310), the main body of the screw rod (310) is a lock shaft (311) suitable for engaging with the lock groove (501), the end of the lock shaft (311) has a first threaded section (312), and the end of the first threaded section (312) is fixedly connected to a retaining ring (314) The portion between the retaining ring (314) and the first threaded section (312) is provided with a clamping ring (303), the end of the retaining ring (314) has an optical axis (315), the outer sleeve of the optical axis (315) is provided with a fixed sealing ring (305), the end of the optical axis (315) has a third threaded section (316), and the first threaded section (312) and the third threaded section (316) are respectively suitable for cooperating with the inner wall thread of the lock tongue cavity (203).

9. The bottle head valve according to claim 8, characterized in that: The retaining ring (314) has a second threaded section (313) at one end facing the first threaded section (312); the second threaded section (313) is externally threaded with a tightening nut (304); a label (302) is sleeved on the outside of the second threaded section (313); the tightening nut (304) is suitable for pressing the label (302) against the end face of the retaining ring (314) through the clamping ring (303); the end face of the label (302) facing the first threaded section (312) is green, and the end face of the label (302) facing the third threaded section (316) is red.

10. The bottle head valve according to claim 9, characterized in that: The outer side surface of the valve body (2) extends outward along the lock tongue cavity (203) to form a tube shape. The valve body (2) is fixedly connected to a sensing signal device (7) on the extension tube, which is suitable for detecting the installation direction of the locking device (3). The first pressure gauge (601) and the second pressure gauge (602) are both electronic and connected to the sensing signal device (7) by wires, which are suitable for realizing remote monitoring.

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