CN110715063B

CN110715063B - Fire extinguisher valve

Info

Publication number: CN110715063B
Application number: CN201910914029.3A
Authority: CN
Inventors: 柴建江
Original assignee: Cixi Jiajie Fire Valve Co ltd
Current assignee: Cixi Jiajie Fire Valve Co ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2021-03-30
Anticipated expiration: 2039-09-25
Also published as: CN110715063A

Abstract

The invention discloses a fire extinguisher valve, which solves the problem that the existing fire extinguisher valve is not suitable for people with small hand strength. The key point of the technical scheme is that the fire extinguisher valve comprises a valve body, a valve core and a locking cylinder, wherein the valve core is blocked at a flow passage port of the valve body, the locking cylinder has a locking state and an unlocking state, and when the locking cylinder is in the locking state, a piston rod of the locking cylinder is abutted against the bottom of the valve core so that the valve core keeps the state of blocking the flow passage port; when the locking cylinder is in an unlocking state, the piston rod of the locking cylinder is retracted, so that the valve core rises under the action of the high-pressure fire extinguishing agent, and the fire extinguisher valve is opened.

Description

Fire extinguisher valve

Technical Field

The invention relates to a fire extinguisher, in particular to a valve of the fire extinguisher.

Background

The fire extinguisher is a portable fire extinguishing tool. Chemical substances or fire extinguishing gas and solid are placed in the fire extinguisher to save and extinguish fire. The fire extinguisher is one of common fire-proof facilities, is stored in public places or places where fire disasters may happen, has different compositions filled in different kinds of fire extinguishing cylinders, is specially designed for different types of fire alarms, and has various kinds, functions and use environments. At present, most of the mainstream fire extinguishers are opened by pressing a valve, so that fire extinguishing substances (such as dry powder, special cleaning gas for fire extinguishment and the like) in the fire extinguisher are sprayed out, and the fire extinguishing function of the fire extinguisher is realized.

The chinese patent of the invention with the publication number of CN106621132B discloses a valve installation system of a superfine dry powder fire extinguisher structure, and discloses a superfine dry powder fire extinguisher valve in the section of the specification [ 0020 ], the valve comprises an upper valve seat, a valve core component, a spring and a lower valve seat, an inner valve channel is arranged on the upper valve seat, and a pressure bar guide hole is arranged above the inner valve channel; the valve core assembly comprises a pressure rod, an upper sealing ring and a lower sealing ring which are arranged on the pressure rod, and a valve core which is arranged on the pressure rod and used for blocking a channel in the valve, the upper part of the pressure rod is in sliding fit with a guide hole of an upper valve seat, the upper sealing ring used for sliding sealing is arranged between the pressure rod and the guide hole, and the top end of the pressure rod extends out of the guide hole and is used for connecting devices such as a pressing handle and the like; the lower end of the pressure lever is connected with the valve core, and the lower sealing ring is positioned above the valve core; the side wall of the upper valve seat is provided with an air outlet hole communicated with the channel in the valve and used for connecting an injection hose, the lower end of the upper valve seat is provided with an air inlet hole communicated with the channel in the valve, and the aperture of the air inlet hole is smaller than that of the channel in the valve, so that the transition part of the two channels is stepped transition; be equipped with the internal thread in the inlet port, be equipped with on the disk seat down can with internal thread complex external screw thread for lower disk seat is connected with last disk seat, has the intraductal passageway that runs through disk seat axial down in the disk seat, is equipped with the support ring reason that is used for supporting reset spring in the disk seat down, and the support ring reason sets up on intraductal passageway inner wall, and reset spring supports the case, pushes down the seal ring and press on the port of inlet port.

When installing above-mentioned superfine dry powder fire extinguisher valve on the fire extinguisher tank body and making up into superfine dry powder fire extinguisher, the internal high pressure fire extinguishing agent of fire extinguisher tank can give ascending pressure of case, can further compress tightly the case on the ladder face of passageway in the valve, the pressure that leads to the user to need to overcome the pressure of spring and high pressure fire extinguishing agent simultaneously just can drive the valve core subassembly downstream, realize that superfine dry powder fire extinguisher goes out the powder, and at the in-process of putting out a fire, the user need push down the depression bar all the time, keep overcoming the pressure of spring pressure and high pressure fire extinguishing agent, lead to this type of fire extinguisher not to be fit for the crowd that the hand is powerful little.

Disclosure of Invention

The invention aims to provide a fire extinguisher valve which is used by people with small hand strength.

The technical purpose of the invention is realized by the following technical scheme:

a fire extinguisher valve comprises a valve body and a valve core, wherein the valve body is provided with a control cavity, a first flow passage and a second flow passage, the first flow passage is arranged at the bottom of the valve body and is communicated with the control cavity, and a flow passage opening is formed at the joint of the first flow passage and the control cavity; the second flow passage is arranged on the side wall of the valve body and communicated with the control cavity; the valve core is arranged in the control cavity, can slide up and down relative to the control cavity and has a first state of blocking the flow passage opening and a second state of opening the flow passage opening; the outer side wall of the valve body is provided with a locking through hole, the side face of the valve body where the locking through hole is located is also provided with a locking cylinder, and the locking cylinder comprises a cylinder shell, a piston head and a piston rod; the air cylinder shell comprises a mounting end mounted on the outer side wall of the valve body and a control end far away from the valve body, a pressure relief joint is arranged at the control end of the air cylinder shell, the pressure relief joint is provided with a pressure relief channel communicated with an inner cavity of the air cylinder shell, and the pressure relief joint is also provided with a sealing film for sealing and separating the pressure relief channel; the piston head is arranged in the inner cavity of the cylinder shell and divides the inner cavity of the cylinder shell into a first cavity and a second cavity, the first cavity and the second cavity of the locking cylinder are filled with high-pressure inert gas, and the air pressure in the first cavity is consistent with the air pressure in the second cavity; one end of the piston rod is connected with the piston head and is positioned on the side surface of the second chamber, and the other end of the piston rod hermetically extends out of the cylinder shell and extends into the control chamber through the locking through hole; the lockout cylinder has a lockout state and an unlock state; when the valve core is in the locking state, the end part of the piston rod of the locking cylinder is abutted against the top of the valve core in the first state and limits the upward sliding of the valve core; when the locking cylinder is in the unlocking state, the piston rod of the locking cylinder retracts relative to the valve core, and the valve core can slide upwards to be switched from the first state to the second state; the lock cylinder is capable of being switched from the locked state to the unlocked state by puncturing the seal film.

By adopting the technical scheme, when the fire extinguisher valve is installed on the fire extinguishing tank body, the pressure of the high-pressure fire extinguishing agent in the fire extinguishing tank body directly acts on the valve core, so that the valve core has the trend of sliding upwards, namely the valve core has the trend of switching from the first state to the second state, and the valve core is maintained in the first state due to the fact that the piston rod of the locking cylinder abuts against the top of the valve core.

When the fire extinguisher with the fire extinguisher valve is required to be used, the sealing membrane of the locking cylinder can be punctured, so that high-pressure inert gas in the first cavity in the locking cylinder can be discharged through the pressure relief channel, the pressure in the first cavity is reduced, the pressure in the second cavity is higher than the pressure in the first cavity, the piston and the piston rod are enabled to integrally slide in the direction away from the valve core, and the locking cylinder is switched into an unlocking state from a locking state; when the valve core is not limited by the piston rod, the valve core moves upwards under the action of the high-pressure fire extinguishing agent in the fire extinguishing tank body, and the valve core is switched from the first state to the second state, so that the high-pressure fire extinguishing agent in the fire extinguishing tank body can be discharged from the second flow passage of the fire extinguisher valve.

Compare in traditional fire extinguisher valve door, the fire extinguisher valve door in this application is comparatively friendly to the little user of hand strength, only needs to use sharp-pointed article to stab the back with the seal membrane, can realize opening of fire extinguisher valve door for the little user of hand strength can use the fire extinguisher that has above-mentioned fire extinguisher valve door comparatively conveniently.

As a further improvement of the present invention, the pressure relief channel sequentially includes a first hole and a second hole coaxially disposed along a direction close to the first chamber, the first hole is larger than the second hole in diameter, and a limiting surface is formed at a connection position of the first hole and the second hole; the circumference border of seal membrane have annular skeleton and with first pore phase adaptation, the pressure release passageway still be equipped with first pore thread fit and compress tightly the seal membrane in the clamping ring of spacing face.

Through adopting above-mentioned technical scheme, disclosed the mounting means of seal membrane on the pressure release passageway, and compare in the outer end of directly fixing the seal membrane at the pressure release joint, the mounting means of above-mentioned seal membrane makes the seal membrane be difficult for being punctured because of the maloperation to promote the whole security performance who possesses the fire extinguisher of above-mentioned fire extinguisher valve.

As a further improvement of the invention, the sealing film divides the pressure relief channel into a first pressure relief cavity communicated with the first chamber and a second pressure relief cavity communicated with the external atmosphere; the outer side wall of the pressure relief joint is also provided with an air leakage hole for communicating the second pressure relief cavity with the atmosphere; the pressure relief joint is provided with a threaded section at one end far away from the cylinder shell, the locking cylinder is further provided with an unlocking end cover in threaded fit with the threaded section, the unlocking end cover is provided with a puncture needle facing the sealing film, and the puncture needle can rotate along the locking direction on the threaded section along with the unlocking end cover to puncture the sealing film.

Through adopting above-mentioned technical scheme, when needs puncture the seal membrane, only need will unlock the end cover and lock on the screw thread section, the drive felting needle punctures to the seal membrane, can avoid the user to find sharp-pointed object and puncture the seal membrane when needs use the fire extinguisher.

As a further improvement of the invention, a step surface is arranged at the joint of the threaded section and the pressure relief joint, and the pressure relief joint is provided with an elastic snap ring which is clamped in the threaded section and is positioned between the unlocking end cover and the step surface; the elastic snap ring is provided with a bayonet convenient for taking the elastic snap ring down from the threaded section; when the unlocking end cover is abutted to the elastic clamping ring, a gap exists between the puncture needle and the sealing membrane.

Through adopting above-mentioned technical scheme, set up the snap ring that is located between unblock end cover and the step face on the pressure release connects, can avoid when not using the fire extinguisher because of the rotatory unblock end cover of transition leads to the thing of fire extinguisher opening to take place to help improving the security performance of the fire extinguisher that has above-mentioned fire extinguisher valve.

As a further improvement of the invention, the bottom surface of the control cavity is a plane; the valve core comprises a plug which is inserted into the first flow channel and is in sealing fit with the first flow channel and a limiting disc which is attached to the bottom surface of the control cavity; a first annular groove is formed in the circumferential direction of the plug, and a first sealing ring abutted against the inner wall of the first flow channel is mounted in the first annular groove; the bottom surface of the limiting disc is provided with a second annular groove, and a second sealing ring which is abutted to the bottom surface of the control cavity is installed in the second annular groove.

By adopting the technical scheme, compared with the traditional fire extinguisher, the valve core of the traditional fire extinguisher is pressed tightly in the valve inner channel of the valve body by the high-pressure fire extinguishing agent, so that the sealing effect of the traditional fire extinguisher is more ideal; and fire extinguisher valve in this application is owing to the injecing of structure for high-pressure fire extinguishing agent drives the tendency that the valve core switches into the second state from first state all the time, consequently is used for promoting the sealing performance between case and the valve body through setting up end cap, first sealing washer, spacing dish and second sealing washer, reduces the probability that high-pressure fire extinguishing agent leaked flow from fire extinguisher valve.

As a further improvement of the invention, the top of the valve core is provided with a valve rod, and the valve body is provided with a valve rod hole for the sliding of the valve rod at the top of the control cavity; and a buffer spring for buffering the impact force of the valve core is sleeved on the valve rod in the control cavity.

Through adopting above-mentioned technical scheme, the cooperation in valve rod and valve rod hole can be for the upper and lower slip of case to lead. When the locking cylinder is switched from the locking state to the unlocking state, the valve core can impact the top of the valve core in the mounting cavity at a higher acceleration rate because of bearing the pressure given by the high-pressure fire extinguishing agent, and the valve core can be given a downward pressure by the arrangement of the buffer spring, so that the valve core is buffered.

As a further improvement of the present invention, the cylinder housing is further provided with a first joint communicating with the first chamber and a second joint communicating with the second chamber; the first joint and the second joint are both self-locking pneumatic joints; a first air pressure gauge for detecting the air pressure value of the first chamber is arranged on a first joint of the locking air cylinder; and a second air pressure meter for detecting the air pressure value of the second chamber is arranged on the second joint of the locking cylinder.

Through adopting above-mentioned technical scheme, first joint and second connect and are the auto-lock pneumatic joint, can conveniently aerify to the first cavity and the second cavity of locking cylinder, and set up first barometer and second barometer on first joint and second connect, can monitor the atmospheric pressure of first cavity and second cavity in real time, avoid the atmospheric pressure variation volume in first cavity and the second cavity great and lead to the thing of the inefficacy of opening of fire extinguisher valve to take place.

As a further improvement of the invention, a hollow threaded sleeve parallel to the piston rod is further arranged above the locking cylinder of the valve body, an auxiliary internal thread is arranged on the inner wall of the threaded sleeve, and an auxiliary screw rod is mounted on the internal thread of the threaded sleeve; one end of the auxiliary screw rod penetrates through the threaded sleeve and extends into the control cavity, an auxiliary head is rotatably mounted on the auxiliary screw rod, an auxiliary chute which is opposite to the auxiliary head and is formed along the length direction of the piston rod is formed in the piston rod, and the auxiliary chute is provided with an opening end close to the valve core and a locking end far away from the valve core; the auxiliary head is provided with an auxiliary sliding rod which extends into the auxiliary sliding groove and abuts against the locking end of the auxiliary sliding groove; the auxiliary sliding rod can move the piston rod in a direction away from the valve core through the rotation of the auxiliary screw rod, so that the locking air cylinder is switched from the locking state to the unlocking state; and a rotary handle is arranged at the other end of the auxiliary screw rod.

By adopting the technical scheme, the arrangement of the threaded sleeve, the auxiliary screw rod, the auxiliary head and the auxiliary sliding rod is mainly used for opening the fire extinguisher valve under the condition that the locking cylinder fails, and the condition that the locking cylinder fails is that the driving force generated by the pressure difference between the first cavity and the second cavity in the locking cylinder to the piston head and the piston rod is smaller than the friction force between the piston rod and the valve core, so that only the driving force for driving the piston head and the piston rod needs to be increased at the moment, and the specific steps are as follows: the auxiliary screw rod is rotated by the rotating handle, so that the auxiliary screw rod integrally moves towards the direction far away from the valve body, the auxiliary screw rod drives the auxiliary head and the auxiliary sliding rod to slide towards the direction far away from the valve core, and due to the abutting fit of the auxiliary sliding rod and the auxiliary sliding groove, the auxiliary sliding rod gives a driving force far away from the valve core to the piston rod, and the locking cylinder is switched into the unlocking state from the locking state.

Meanwhile, through the arrangement of the auxiliary sliding groove, when the driving force generated by the pressure difference between the first cavity and the second cavity in the locking cylinder to the piston head and the piston rod is larger than the friction force between the piston rod and the valve core, the auxiliary sliding rod cannot interfere with the normal unlocking of the locking cylinder.

As a further improvement of the present invention, a sliding seat corresponding to the piston rod is disposed at the top of the valve core, the sliding seat has an arc-shaped sliding groove for the piston rod to slide, a ball groove is disposed at the bottom surface of the end portion of the piston rod, and a rotating ball abutted against the arc-shaped sliding groove is rotatably mounted in the ball groove.

Through adopting above-mentioned technical scheme, the arc spout of piston rod and sliding seat is mutually supported to and the bottom of piston rod is equipped with rotatory ball, helps reducing the biggest static friction between piston rod and the case, helps the piston rod to break away from the top of case.

In conclusion, the invention has the following beneficial effects:

1. a fire extinguisher valve comprises a valve body, a valve core and a locking cylinder, wherein the valve core is blocked at a flow passage port of the valve body, the locking cylinder has a locking state and an unlocking state, and when the locking cylinder is in the locking state, a piston rod of the locking cylinder is abutted against the bottom of the valve core so that the valve core keeps the state of blocking the flow passage port; when the locking cylinder is in an unlocking state, the piston rod of the locking cylinder is retracted, so that the valve core is lifted under the action of the high-pressure fire extinguishing agent, and the valve of the fire extinguisher is opened, wherein the locking cylinder can be switched from the locking state to the unlocking state by puncturing the sealing film, and the opening mode is simple and is suitable for people with small hand strength;

2. the sealing film is protected by arranging the unlocking end cover and the elastic snap ring, and in the using process, the unlocking end cover is screwed after the elastic snap ring is taken down, so that the sealing film can be punctured, and the fire extinguisher valve is opened;

3. the valve body is further provided with a threaded sleeve, an auxiliary screw rod, an auxiliary head and an auxiliary sliding rod, an auxiliary sliding groove for the auxiliary sliding rod to slide is formed in the end portion, close to the valve core, of the piston rod, and when driving force generated by pressure difference between the first cavity and the second cavity in the locking cylinder to the piston head and the piston rod is smaller than friction force between the piston rod and the valve core, driving force far away from the valve core can be given to the piston rod through the structure, and therefore the locking cylinder can be switched from a locking state to an unlocking state.

Drawings

FIG. 1 is a schematic view of the structure of a fire extinguisher valve according to the present application;

FIG. 2 is a schematic sectional view of a fire extinguisher valve according to the present application;

FIG. 3 is a schematic structural view of a valve body according to the present application;

FIG. 4 is a schematic structural view of a valve cartridge of the present application;

FIG. 5 is a schematic structural view of a sliding seat of the valve core in the present application;

FIG. 6 is a schematic view of the lock cylinder of the present application;

FIG. 7 is a schematic view of the lock cylinder at the pressure relief joint of the present application;

FIG. 8 is a schematic view of a snap ring according to the present application;

fig. 9 is a schematic view of the auxiliary screw and the piston rod of the present application.

In the figure: 1. a valve body; 11. a lower valve body; 111. installing a connector; 12. an upper valve body; 131. a control chamber; 132. a first flow passage; 133. a second flow passage; 134. a runner port; 14. a valve stem bore; 15. a buffer spring; 16. locking the joint; 161. a locking through hole; 17. a threaded sleeve; 2. a valve core; 21. a plug; 211. a first ring groove; 212. a first seal ring; 22. a limiting disc; 221. a second ring groove; 222. a second seal ring; 23. a valve stem; 24. a sliding seat; 241. an arc-shaped chute; 3. locking the air cylinder; 31. a cylinder housing; 311. an installation end; 312. a control end; 313. a mounting ring; 314. a first chamber; 315. a second chamber; 32. a piston head; 33. a piston rod; 331. a ball groove; 332. rotating the ball; 333. an auxiliary chute; 3331. an opening end; 3332. a locking end; 341. a first joint; 342. a second joint; 343. a first barometer; 344. a second barometer; 35. a pressure relief fitting; 351. a pressure relief channel; 3511. a first hole; 3512. a second hole; 3513. a limiting surface; 3514. a first pressure relief cavity; 3515. a second pressure relief cavity; 352. an air release hole; 353. a threaded segment; 354. a step surface; 36. pressing a ring; 4. a sealing film; 41. an annular skeleton; 5. unlocking the end cover; 51. a needle; 6. an elastic snap ring; 61. a bayonet; 7. an auxiliary screw; 71. an auxiliary head; 72. an auxiliary slide bar; 73. rotating the handle; 731. a handle base; 732. a handle is arranged.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to attached figures 1 and 2, the fire extinguisher valve mainly comprises a valve body 1, a valve core 2 and a locking cylinder 3.

Referring to fig. 3, the valve body 1 includes a lower valve body 11 and an upper valve body 12. The top of the lower valve body 11 is provided with a counter bore, and the side wall of the lower valve body 11 is further provided with a side hole which is communicated with the counter bore and is horizontally arranged. The upper valve body 12 is installed on the top of the lower valve body 11 in a threaded manner, and the top opening of the counter bore in the lower valve body 11 is sealed and covered. When the upper valve body 12 is mounted to the lower valve body 11 to form the valve body 1 in combination, the counterbore and the side hole form the control chamber 131, the first flow passage 132, and the second flow passage 133 of the valve body 1 in combination. The whole control cavity 131 is a cylindrical cavity, and the bottom surface of the control cavity 131 is a plane; the first flow channel 132 is arranged at the bottom of the valve body 1 and communicated with the control cavity 131, and a flow channel port 134 is formed at the joint of the first flow channel 132 and the control cavity 131; the second flow passage 133 is formed by a side hole and communicates with the control chamber 131.

Wherein, the bottom of the lower valve body 11 is further provided with an installation connector 111 along the first flow passage 132 for conveniently installing the fire extinguisher valve on the fire extinguisher tank.

Referring to fig. 2, 3 and 4, the valve element 2 is disposed in the control chamber 131, and the valve element 2 includes a plug 21 inserted into the first flow channel 132 and hermetically engaged with the first flow channel 132, and a limiting disc 22 engaged with the bottom surface of the control chamber 131. At least two first ring grooves 211 are formed in the circumferential direction of the plug 21, and first sealing rings 212 abutting against the inner wall of the first flow channel 132 are mounted in the first ring grooves 211. A second annular groove 221 is formed in the bottom surface of the limiting disc 22, and a second sealing ring 222 which is in sealing fit with the bottom surface of the control cavity 131 is installed in the second annular groove 221.

The valve body 2 can slide up and down with respect to the control chamber 131 to have a first state in which the flow port 134 is closed and a second state in which the flow port 134 is opened. When the valve core 2 is in the first state, the plug 21 extends into the first flow passage 132; when the valve core 2 is in the second state, the plug 21 is disengaged from the first flow passage 132.

The valve core 2 has a valve rod 23 at the top, and the valve body 1 has a valve rod hole 14 at the top of the control chamber 131 for the sliding of the valve rod 23. The valve rod hole 14 is designed to be a blind hole, and the top of the valve rod 23 cannot abut against the top wall of the valve rod hole 14 in the process of switching the valve core 2 from the first state to the second state.

The valve body 1 is further provided with a buffer spring 15 in the control chamber 131. Wherein, the buffer spring 15 is a conical spring and is sleeved on the valve rod 23, the large diameter end of the buffer spring 15 abuts against the top surface of the control cavity 131, and the small diameter end of the buffer spring 15 abuts against the top of the valve core 2. The provision of the damper spring 15 can damp the impact force when the valve body 2 is switched from the first state to the second state.

Referring to fig. 3, the valve body 1 is further provided with a horizontally disposed locking nipple 16, and the locking nipple 16 has a locking through-hole 161 coaxially disposed therewith and communicating with the control chamber 131.

Referring to fig. 2 and 6, the locking cylinder 3 is installed at the locking joint 16 of the valve body 1. The lock cylinder 3 includes a cylinder housing 31, a piston head 32, and a piston rod 33.

The cylinder housing 31 comprises a mounting end 311 mounted on the outer side wall of the valve body 1 and a control end 312 far away from the valve body 1. The mounting end 311 of the cylinder housing 31 has a mounting ring 313 that threadably engages the locking nipple 16. The locking cylinder 3 is fixed on the outer side wall of the valve body 1 through the cooperation of the mounting ring 313 and the locking joint 16.

Referring to fig. 6, the piston head 32 is disposed in the inner cavity of the cylinder housing 31 and divides the inner cavity of the cylinder housing 31 into a first chamber 314 and a second chamber 315. Wherein the first chamber 314 is located at one end of the locking cylinder 3 far from the valve body 1, and the second chamber 315 is located at one end of the locking cylinder 3 near the valve body 1. One end of the piston rod 33 is connected to the side of the piston head 32 located in the second chamber 315, and the other end of the piston rod 33 is hermetically extended out of the cylinder housing 31 and is extended into the control chamber 131 through the locking through hole 161.

The bottom surface of the end of the piston rod 33 is provided with a ball groove 331, and a rotary ball 332 is rotatably mounted in the ball groove 331.

Referring to fig. 4 and 5, the top of the valve core 2 is further provided with a sliding seat 24 corresponding to the piston rod 33, and the sliding seat 24 is provided with an arc-shaped sliding groove 241 for sliding the piston rod 33 (see fig. 6). When the piston rod 33 is inserted into the arc-shaped slide groove 241, the rotary ball 332 abuts against the bottom surface of the arc-shaped slide groove 241.

Referring to fig. 1 and 6, the cylinder housing 31 is further provided with a first joint 341 communicating with the first chamber 314 and a second joint 342 communicating with the second chamber 315. The first joint 341 and the second joint 342 are self-locking pneumatic joints. The locking cylinder 3 is provided with a first air pressure gauge 343 for detecting the air pressure value of the first chamber 314 on the first joint 341; the lock cylinder 3 is provided with a second air pressure gauge 344 for detecting the air pressure value of the second chamber 315 at the second joint 342.

Referring to fig. 6 and 7, cylinder housing 31 is provided with a pressure relief fitting 35 at control end 312. The relief joint 35 has a relief passage 351 communicating with the inner cavity of the cylinder housing 31. The pressure relief channel 351 sequentially comprises a first hole 3511 and a second hole 3512 which are coaxially arranged along the direction close to the first chamber 314, the diameter of the first hole 3511 is larger than that of the second hole 3512, and a limiting surface 3513 is formed at the joint of the first hole 3511 and the second hole 3512.

A seal film 4 for sealing and blocking the relief passage 351 is provided in the relief joint 35. The sealing film 4 partitions the pressure relief passage 351 into a first pressure relief chamber 3514 communicating with the first chamber 314 and a second pressure relief chamber 3515 communicating with the outside atmosphere. The peripheral edge of the sealing membrane 4 has an annular skeleton 41 and is adapted to said first hole 3511. The pressure relief channel 351 is further provided with a pressing ring 36 which is in threaded fit with the first hole 3511 and presses the sealing film 4 against the limiting surface 3513. In this embodiment, the inner bore of the pressure ring 36 has a regular hexagonal cross-section.

The outer side wall of the pressure relief joint 35 is further provided with a gas release hole 352 communicated with the second pressure relief cavity 3515 and the atmosphere. The diameter of the air release hole 352 is 5 mm. The end of the pressure relief connector 35 remote from the cylinder housing 31 is provided with a threaded section 353, and the connection of the threaded section 353 and the pressure relief connector 35 is provided with a step surface 354. The locking cylinder 3 is further provided with an unlocking end cap 5 in threaded engagement with the threaded section 353, the unlocking end cap 5 having a spike 51 directed towards the sealing membrane 4, the spike 51 being capable of puncturing the sealing membrane 4 as the unlocking end cap 5 is rotated in a locking direction on the threaded section 353.

Referring to fig. 7 and 8, the pressure relief connector 35 is provided with an elastic snap ring 6 which is clamped in the threaded section 353 and is located between the unlocking end cap 5 and the step surface 354. The snap ring 6 has a bayonet 61 to facilitate its removal from the threaded section 353. When the unlocking end cap 5 abuts against the snap ring 6, there is a gap between the spike 51 and the sealing membrane 4.

The lock cylinder 3 has a locked state and an unlocked state. When the locking cylinder 3 is in the locking state, the end of the piston rod 33 of the locking cylinder 3 abuts against the top of the valve core 2 in the first state and limits the upward sliding of the valve core 2. When the lock cylinder 3 is in the unlock state, the piston rod 33 of the lock cylinder 3 retracts with respect to the valve body 2, and the valve body 2 can slide upward to be switched from the first state to the second state. The locking cylinder 3 can be switched from the locked state to the unlocked state by puncturing the sealing film 4.

Referring to fig. 2 and 9, the valve body 1 is further provided with a hollow threaded sleeve 17 parallel to the piston rod 33 above the locking cylinder 3. The inner wall of the threaded sleeve 17 is provided with auxiliary internal threads. The threaded sleeve 17 is internally threaded with an auxiliary screw 7, and one end of the auxiliary screw 7 penetrates through the threaded sleeve 17 and extends into the control cavity 131. The auxiliary screw 7 is rotatably mounted at one end extending into the control chamber 131 with an auxiliary head 71, the auxiliary head 71 having an auxiliary slide 72 extending towards the piston rod 33.

The piston rod 33 is provided with an auxiliary chute 333 opposite to the auxiliary head 71 and arranged along the length direction of the piston rod 33, and the auxiliary chute 333 is provided with an opening end 3331 close to the valve core 2 and a locking end 3332 far away from the valve core 2. The auxiliary slide rod 72 is inserted into the auxiliary slide groove 333 and is slidable in the auxiliary slide groove 333 in the longitudinal direction of the piston rod 33.

Referring to fig. 1 to 9, when the lock cylinder 3 is in the locked state, the auxiliary slide 72 abuts against the lock end 3332 of the auxiliary slide groove 333. When the lock cylinder 3 can be normally unlocked, that is, the pressure difference between the first cavity and the second cavity in the lock cylinder 3 generates a driving force to the piston head 32 and the piston rod 33 which is greater than the friction force between the piston rod 33 and the spool 2, during the process of switching the lock cylinder 3 from the locked state to the unlocked state, the auxiliary slide rod 72 slides relative to the piston rod 33, and the auxiliary slide rod 72 does not abut against the opening end 3331.

When the lock cylinder 3 cannot be normally unlocked, i.e., the pressure difference between the first cavity and the second cavity in the lock cylinder 3 generates a driving force to the piston head 32 and the piston rod 33 that is smaller than the frictional force between the piston rod 33 and the spool 2, the auxiliary slide rod 72 can move the piston rod 33 away from the spool 2 by the rotation of the auxiliary screw 7 to switch the lock cylinder 3 from the locked state to the unlocked state.

Referring to fig. 1, the other end of the auxiliary screw 7 is mounted with a rotary knob 73. In this embodiment, the rotating handle 73 includes a handle holder 731 mounted on the auxiliary screw 7 and a handle grip 732 hingedly mounted on the handle holder 731. The handle 732 can be folded with respect to the handle holder 731, thereby reducing the erroneous operation of the rotating handle 73.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. A fire extinguisher valve comprises a valve body (1) and a valve core (2), wherein the valve body (1) is provided with a control cavity (131), a first flow passage (132) and a second flow passage (133), the first flow passage (132) is arranged at the bottom of the valve body (1) and communicated with the control cavity (131), and a flow passage opening (134) is formed at the connection part of the first flow passage (132) and the control cavity (131); the second flow channel (133) is arranged on the side wall of the valve body (1) and communicated with the control cavity (131); the valve core (2) is arranged in the control cavity (131), and the valve core (2) can slide up and down relative to the control cavity (131) to have a first state of blocking the flow passage opening (134) and a second state of opening the flow passage opening (134);

the outer side wall of the valve body (1) is provided with a locking through hole (161), the side face of the valve body (1) where the locking through hole (161) is located is also provided with a locking cylinder (3), and the locking cylinder (3) comprises a cylinder shell (31), a piston head (32) and a piston rod (33); the air cylinder shell (31) comprises a mounting end (311) mounted on the outer side wall of the valve body (1) and a control end (312) far away from the valve body (1), the control end (312) of the air cylinder shell (31) is provided with a pressure relief joint (35), the pressure relief joint (35) is provided with a pressure relief channel (351) communicated with an inner cavity of the air cylinder shell (31), and the pressure relief joint (35) is further provided with a sealing film (4) for sealing and separating the pressure relief channel (351); the piston head (32) is arranged in the inner cavity of the cylinder housing (31) and divides the inner cavity of the cylinder housing (31) into a first chamber (314) and a second chamber (315), the locking cylinder (3) is filled with high-pressure inert gas in the first chamber (314) and the second chamber (315), and the gas pressure in the first chamber (314) and the gas pressure in the second chamber (315) are kept consistent; one end of the piston rod (33) is connected to the side surface of the piston head (32) positioned in the second chamber (315), and the other end of the piston rod (33) hermetically extends out of the cylinder shell (31) and extends into the control chamber (131) through the locking through hole (161);

the locking cylinder (3) has a locked state and an unlocked state; when the valve core (2) is in the locking state, the end part of a piston rod (33) of the locking cylinder (3) is abutted against the top of the valve core (2) in the first state and limits the upward sliding of the valve core (2); when in the unlocking state, a piston rod (33) of the locking cylinder (3) retracts relative to the valve core (2), and the valve core (2) can slide upwards to be switched from a first state to a second state; the locking cylinder (3) is switchable from the locked state to the unlocked state by puncturing the sealing membrane (4).

2. A fire extinguisher valve as claimed in claim 1, wherein said pressure relief passage (351) comprises a first hole (3511) and a second hole (3512) coaxially arranged in sequence in a direction close to said first chamber (314), the diameter of said first hole (3511) is larger than that of said second hole (3512), and a stopper surface (3513) is formed at the junction of said first hole (3511) and said second hole (3512); the circumference border of sealing membrane (4) have annular skeleton (41) and with first hole (3511) looks adaptation, pressure release channel (351) still be equipped with first hole (3511) screw-thread fit and with sealing membrane (4) compress tightly in clamping ring (36) of spacing face (3513).

3. A fire extinguisher valve as claimed in claim 1, wherein said sealing membrane (4) divides said pressure relief passage (351) into a first pressure relief chamber (3514) in communication with said first chamber (314) and a second pressure relief chamber (3515) in communication with the outside atmosphere; the outer side wall of the pressure relief joint (35) is also provided with a gas release hole (352) for communicating the second pressure relief cavity (3515) with the atmosphere; the pressure relief joint (35) is provided with a threaded section (353) at one end far away from the cylinder housing (31), the locking cylinder (3) is further provided with an unlocking end cover (5) in threaded fit with the threaded section (353), the unlocking end cover (5) is provided with a puncture needle (51) facing the sealing membrane (4), and the puncture needle (51) can rotate along the locking direction on the threaded section (353) along with the unlocking end cover (5) to puncture the sealing membrane (4).

4. A fire extinguisher valve according to claim 3, characterized in that the junction of the threaded section (353) and the pressure relief joint (35) has a step surface (354), and the pressure relief joint (35) is provided with an elastic snap ring (6) which is clamped in the threaded section (353) and is positioned between the unlocking end cap (5) and the step surface (354); the elastic clamping ring (6) is provided with a bayonet (61) which is convenient to take down from the threaded section (353); when the unlocking end cover (5) abuts against the elastic clamping ring (6), a gap exists between the puncture needle (51) and the sealing membrane (4).

5. A fire extinguisher valve as claimed in claim 1, wherein the bottom surface of said control chamber (131) is planar; the valve core (2) comprises a plug (21) which is inserted into the first flow channel (132) and is in sealing fit with the first flow channel (132) and a limiting disc (22) which is attached to the bottom surface of the control cavity (131); a first annular groove (211) is formed in the circumferential direction of the plug (21), and a first sealing ring (212) which is abutted to the inner wall of the first flow channel (132) is mounted in the first annular groove (211); and a second annular groove (221) is formed in the bottom surface of the limiting disc (22), and a second sealing ring (222) abutted against the bottom surface of the control cavity (131) is installed in the second annular groove (221).

6. A fire extinguisher valve according to claim 1, characterized in that a valve rod (23) is arranged at the top of the valve core (2), and a valve rod hole (14) for sliding the valve rod (23) is formed at the top of the control cavity (131) of the valve body (1); and a buffer spring (15) for buffering the impact force of the valve core (2) is sleeved on the valve rod (23) in the control cavity (131).

7. A fire extinguisher valve as claimed in claim 1, wherein said cylinder housing (31) is further provided with a first connector (341) communicating with said first chamber (314) and a second connector (342) communicating with said second chamber (315); the first joint (341) and the second joint (342) are both self-locking pneumatic joints; the locking cylinder (3) is provided with a first air pressure gauge (343) which is used for detecting the air pressure value of the first chamber (314) and is arranged on a first joint (341); the locking cylinder (3) is provided with a second air pressure gauge (344) which is used for detecting the air pressure value of the second chamber (315) and is arranged on a second joint (342).

8. A fire extinguisher valve according to claim 1, characterized in that the valve body (1) is further provided with a hollow threaded sleeve (17) parallel to the piston rod (33) above the locking cylinder (3), the inner wall of the threaded sleeve (17) is provided with an auxiliary internal thread, and the threaded sleeve (17) is internally threaded with an auxiliary screw (7); one end of the auxiliary screw rod (7) penetrates through the threaded sleeve (17) to extend into the control cavity (131) and is rotatably provided with an auxiliary head (71), the piston rod (33) is provided with an auxiliary sliding groove (333) which is opposite to the auxiliary head (71) and is formed along the length direction of the piston rod (33), and the auxiliary sliding groove (333) is provided with an opening end (3331) close to the valve core (2) and a locking end (3332) far away from the valve core (2); the auxiliary head (71) is provided with an auxiliary sliding rod (72) which extends into the auxiliary sliding groove (333) and abuts against a locking end (3332) of the auxiliary sliding groove (333); the auxiliary sliding rod (72) can move the piston rod (33) in a direction away from the valve core (2) through the rotation of the auxiliary screw rod (7) so that the locking cylinder (3) is switched from the locking state to the unlocking state; the other end of the auxiliary screw rod (7) is provided with a rotary handle (73).

9. A fire extinguisher valve according to claim 1, characterized in that a sliding seat (24) corresponding to the piston rod (33) is provided on the top of the valve core (2), the sliding seat (24) has an arc chute (241) for the piston rod (33) to slide, a ball groove (331) is provided on the bottom surface of the end of the piston rod (33), and a rotary ball (332) abutting against the arc chute (241) is rotatably installed in the ball groove (331).