Non-pressure-storage type fire extinguishing device

Abstract

The non-pressure-storage type fire extinguishing device comprises a barrel, a first plugging unit, a second plugging unit and a gas generation unit, the barrel is provided with a liquid storage cavity, the two ends of the liquid storage cavity are open, and the liquid storage cavity is used for containing a liquid fire extinguishing agent; the first plugging unit comprises a first end cover, a first piston and an elastic piece, the first end cover detachably covers an opening in one end of the liquid storage cavity, the first end cover is provided with a liquid drainage channel communicated with the liquid storage cavity, and the two ends of the elastic piece are connected with the first end cover and the first piston respectively. The device has the beneficial effects that the outlet is blocked in the mode that the piston and the spring replace a rupture disk, higher sealing performance is achieved, the problem of fire extinguishing agent leakage possibly caused by poor sealing performance of a traditional rupture disk is solved, and the problem of fatigue fracture possibly caused by the water hammer effect of the conventional rupture disk in the vibration environment is further solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fire fighting equipment, and in particular to a non-pressure storage type fire extinguishing device. Background Art

[0002] Perfluorohexanone fire extinguishing agent is being used by many fire safety companies as a new type of highly efficient and environmentally friendly fire extinguishing medium. However, since perfluorohexanone is a liquid at room temperature and pressure, many perfluorohexanone fire extinguishing systems have adopted the structure of water-based fire extinguishing devices. However, water-based fire extinguishing devices are usually pressure storage structures, which are generally accompanied by certain safety hazards. Therefore, in order to make up for the shortcomings of pressure storage perfluorohexanone fire extinguishing devices, non-pressure storage perfluorohexanone fire extinguishing devices have appeared on the market. The principle is usually to use a gas generating agent to generate a large amount of gas and then push the perfluorohexanone fire extinguishing agent to implement fire extinguishing.

[0003] Existing non-pressure storage fire extinguishing devices (such as a non-pressure storage fire extinguishing device disclosed in application No. 201910969980.9) generally use a bursting disc as a sealing diaphragm to seal the liquid outlet, but the bursting disc may suffer from fatigue fracture in a vibration environment, lose its sealing effect, and cause leakage of the fire extinguishing agent. Summary of the invention The purpose of the present invention is to overcome the above technical deficiencies and propose a non-pressure storage fire extinguishing device to solve the technical problem that the bursting disc in the prior art may suffer from fatigue fracture under a vibration environment, lose its sealing effect, and cause leakage of the fire extinguishing agent.

[0004] In order to achieve the above technical objectives, the technical solution of the present invention provides a non-pressure storage type fire extinguishing device, comprising: The cylinder has a liquid storage cavity, both ends of which are open, and the liquid storage cavity is used to contain liquid fire extinguishing agent; A first blocking unit, comprising a first end cover, a first piston and an elastic member, wherein the first end cover is detachably disposed at an opening at one end of the liquid storage chamber, the first end cover has a liquid discharge passage communicating with the liquid storage chamber, and both ends of the elastic member are respectively connected to the first end cover and the first piston, so that the first piston is sealingly slidably disposed in the liquid discharge passage; A second blocking unit, used to block the opening at the other end of the liquid storage chamber; The gas generating unit is used to generate high-pressure nitrogen and allow the high-pressure nitrogen to enter the liquid storage chamber.

[0005] Furthermore, the first end cover is provided with a receiving hole, a liquid inlet hole and a liquid discharge hole, the receiving hole extends in a direction perpendicular to the length of the cylinder, the liquid inlet hole and the liquid discharge hole both extend in the length of the cylinder, one end of the liquid inlet hole is connected with one end of the receiving hole, and one end of the liquid discharge hole is connected with the middle of the receiving hole, the receiving hole, the liquid inlet hole and the liquid discharge hole form the liquid discharge channel, the first piston and the elastic member are both arranged in the receiving hole and located at the other end of the receiving hole, and the elastic member is used to seal the first piston at the opening of the liquid discharge hole.

[0006] Furthermore, the first blocking unit also includes a limiter, which is fixed in the receiving hole and located at the other end of the receiving hole. One end of the elastic member is fixedly connected to the limiter. When the liquid fire extinguishing agent pushes the first piston to move away from the orifice of the drainage hole, the limiter is connected to the first piston for locking the first piston.

[0007] Furthermore, the first sealing unit also includes a plug, and the other end of the receiving hole is a sealing setting. The plug is arranged in the receiving hole and located at the other end of the receiving hole, and is used to seal the other end of the receiving hole. The plug is detachably fixed to the first end cover, and the limiter is fixed on the plug.

[0008] Furthermore, the second blocking unit includes a blocking body and a second piston. The blocking body is detachably arranged at the opening at the other end of the liquid storage chamber to block the opening at the other end of the liquid storage chamber. The blocking body has a receiving chamber extending along the length direction of the cylinder, the outer end of the receiving chamber is an opening, and the inner end of the receiving chamber is a sealing setting. At least one first flow hole connected to the receiving chamber and at least one second flow hole connected to the receiving chamber are opened on the inner end of the blocking body. Each of the first flow holes and each of the second flow holes are also connected to the liquid storage chamber. The second piston is sealingly slidably arranged in the receiving chamber to separate the first space and the second space from the inside to the outside in the receiving chamber. The air pressure in the liquid storage chamber can push the second piston to reach the first position. When the second piston is in the first position, each of the first flow holes and each of the second flow holes are connected to the first space.

[0009] Furthermore, the blocking body includes a central tube, a second end cover and a sealing cover. The central tube is arranged in the liquid storage cavity, and both ends of the central tube are opened. The second end cover is fixedly sleeved on the outer end of the central tube, and is removably covered at the opening of the other end of the liquid storage cavity. The sealing cover is removably covered at the opening of the inner end of the central tube to enclose the receiving cavity with the central tube, and each of the first flow holes and each of the second flow holes are opened on the sealing cover.

[0010] Furthermore, the gas generating unit is arranged in the receiving chamber and is located in the second space. The high-pressure nitrogen generated by the gas generating unit can push the second piston to a second position. When the second piston is located at the second position, each of the first flow holes is connected to the first space, and each of the second flow holes is connected to the second space.

[0011] Further, each of the first flow holes extends along the length direction of the cylinder, and each of the second flow holes extends in a direction perpendicular to the length direction of the cylinder.

[0012] Furthermore, the gas generating unit includes a substrate, a gas-producing charge, an ignition charge and an electric starter. The substrate is detachably arranged at the opening at the outer end of the accommodating chamber and is located in the second space, and is used to seal the opening at the outer end of the accommodating chamber. The substrate has a combustion chamber extending along the length direction of the cylinder, the outer end of the combustion chamber is an opening, and the inner end of the combustion chamber is a sealed end. A release hole connected to the combustion chamber is opened on the substrate, and the release hole is also connected to the second space. The gas-producing charge, the ignition charge and the electric starter are fixed in the combustion chamber from the inside to the outside, and the ignition charge is fixedly connected to the gas-producing charge. The electric starter is electrically connected to the circuit system via a wire.

[0013] Furthermore, the base includes a combustion tube, a mounting ring and a mounting seat, the combustion tube is arranged in the second space, and the outer end of the combustion tube is an open setting, and the inner end of the combustion tube is a sealed setting, and the combustion chamber is formed in the combustion tube, the mounting ring is removably covered at the opening of the outer end of the combustion tube, and is removably fixed to the second end cover, the mounting seat is removably arranged in the middle hole of the mounting ring, the mounting seat has a mounting cavity connected to the combustion chamber, the electric starter is removably fixed in the mounting cavity, and is used to seal the mounting cavity, and the wire post of the electric starter passes through the mounting cavity and extends out of the combustion cavity.

[0014] Compared with the prior art, the beneficial effects of the present invention include: when a fire occurs, the gas generating unit is started and generates high-pressure nitrogen, which enters the liquid storage chamber. The liquid fire extinguishing agent, under the push of the high-pressure nitrogen, will push the first piston out of the discharge channel, the discharge channel is in an open state, and the liquid fire extinguishing agent is sprayed out. The non-pressure storage type fire extinguishing device uses a piston plus a spring instead of a bursting disc to seal the outlet, has higher sealing performance, solves the problem of fire extinguishing agent leakage caused by poor sealing of traditional bursting discs, and also solves the problem of fatigue fracture of conventional bursting discs due to water hammer in a vibration environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of a non-pressure storage type fire extinguishing device provided by the present invention; Figure 2 It is a structural schematic diagram of a non-pressure storage type fire extinguishing device provided by the present invention; Figure 3 yes Figure 2 A schematic structural diagram of the first plugging unit in FIG. Figure 4 yes Figure 2 A structural schematic diagram of the connection relationship between the second plugging unit and the gas generating unit; Figure 5 yes Figure 2 A schematic diagram of the structure of the gas generating unit; In the figure: 100-cylinder, 110-liquid storage chamber, 200-first blocking unit, 210-first end cover, 211-liquid discharge channel, 212-receiving hole, 213-liquid inlet hole, 214-liquid discharge hole, 220-first piston, 221-protrusion, 230-elastic member, 240-limiter, 250-plug, 260-first sealing ring, 270-first bracket, 300-second blocking unit, 310-blocking body, 311-receiving chamber, 3111-first space, 3112-second space, 312-first flow hole, 313 - second flow hole, 314 - center tube, 315 - second end cover, 316 - cover, 317 - second sealing ring, 320 - second piston, 330 - third sealing ring, 340 - second bracket, 400 - gas generating unit, 410 - base, 411 - combustion chamber, 412 - release hole, 413 - combustion tube, 414 - mounting ring, 415 - mounting seat, 4151 - mounting chamber, 416 - fourth sealing ring, 417 - fifth sealing ring, 420 - gas generating charge, 430 - ignition charge, 440 - electric starter. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0017] The present invention provides a non-pressure storage type fire extinguishing device, the structure of which is as follows: Figure 1 - Figure 4As shown, it includes a cylinder 100, a first blocking unit 200, a second blocking unit 300 and a gas generating unit 400. The cylinder 100 has a liquid storage chamber 110, both ends of which are opened. The liquid storage chamber 110 is used to contain liquid fire extinguishing agent; the first blocking unit 200 includes a first end cover 210, a first piston 220 and an elastic member 230. The first end cover 210 is detachably covered at the opening at one end of the liquid storage chamber 110. The first end cover 210 has a liquid discharge channel 211 connected to the liquid storage chamber 110. The two ends of the elastic member 230 are respectively connected to the first end cover 210 and the first piston 220, so that the first piston 220 is sealed and slidably arranged in the liquid discharge channel 211; the second blocking unit 300 is used to block the opening at the other end of the liquid storage chamber 110; the gas generating unit 400 is used to generate high-pressure nitrogen and allow the high-pressure nitrogen to enter the liquid storage chamber 110.

[0018] When a fire occurs, the gas generating unit 400 is started and generates high-pressure nitrogen. The generated high-pressure nitrogen enters the liquid storage chamber 110. The liquid fire extinguishing agent, pushed by the high-pressure nitrogen, pushes the first piston 220 to move out of the discharge channel 211. The discharge channel 211 is in an open state, and the liquid fire extinguishing agent is sprayed out. The non-pressure storage type fire extinguishing device uses a piston plus a spring instead of a bursting disc to seal the outlet, which has higher sealing performance. The outlet opening pressure can be adjusted by selecting the spring stiffness, which solves the problem of fire extinguishing agent leakage caused by the poor sealing of traditional bursting discs, and also solves the problem of fatigue fracture of conventional bursting discs due to water hammer in a vibration environment.

[0019] As a preferred embodiment, please refer to Figure 2 and Figure 3The first end cover 210 is provided with a receiving hole 212, a liquid inlet hole 213 and a liquid discharge hole 214. The receiving hole 212 extends in a direction perpendicular to the length of the cylinder 100. The liquid inlet hole 213 and the liquid discharge hole 214 both extend in the length of the cylinder 100. One end of the liquid inlet hole 213 is connected to one end of the receiving hole 212, and one end of the liquid discharge hole 214 is connected to the middle of the receiving hole 212. The receiving hole 212, the liquid inlet hole 213 and the liquid discharge hole 214 form the liquid discharge channel 211. The first piston 220 and the elastic member 230 are both disposed in the receiving hole 212 and are located in the receiving hole. At the other end of the first end cover 212, the elastic member 230 is used to seal the first piston 220 at the orifice of the drainage hole 214. The receiving hole 212 can accommodate the first piston 220, improve the stability of the movement of the first piston 220, and improve the sealing effect of the first piston 220. When the first end cover 210 is detachably covered at the opening of one end of the liquid storage chamber 110, the other end of the liquid inlet hole 213 is used to communicate with the liquid storage chamber 110. Under the push of the high-pressure nitrogen body, the liquid fire extinguishing agent will push the first piston 220 away from the orifice of the drainage hole 214, and the drainage hole 214 is in an open state, and the liquid fire extinguishing agent is sprayed out.

[0020] As a preferred embodiment, the elastic member 230 is a spring.

[0021] As a preferred embodiment, please refer to Figure 3 The first blocking unit 200 also includes a limiter 240, which is fixed in the receiving hole 212 and located at the other end of the receiving hole 212. One end of the elastic member 230 is fixedly connected to the limiter 240. When the liquid fire extinguishing agent pushes the first piston 220 to move away from the opening of the drainage hole 214, the limiter 240 is connected to the first piston 220 to lock the first piston 220 to prevent the first piston 220 from sliding down and blocking the opening of the drainage hole 214 under the action of external force after moving away from the opening of the drainage hole 214.

[0022] As a preferred embodiment, please refer to Figure 3 The limiter 240 is a wire locker, the first piston 220 has a protrusion 221 with a columnar structure, the protrusion 221 is used to be inserted into the wire locker and locked by the wire locker, the aperture of the wire locker is 3.2mm, and it can lock cylindrical objects such as 2mm-3mm wire ropes, the diameter of the protrusion 221 is between 2mm-3mm, the wire locker is a prior art, and will not be described in detail in this solution.

[0023] As a preferred embodiment, please refer to Figure 3The first blocking unit 200 also includes a plug 250. The other end of the receiving hole 212 is a sealing setting. The plug 250 is arranged in the receiving hole 212 and is located at the other end of the receiving hole 212 to block the other end of the receiving hole 212. The plug 250 is detachably fixed to the first end cover 210. The limiter 240 is fixed on the plug 250. When the plug 250 is removed from the first end cover 210, the limiter 240, the elastic member 230 and the first piston 220 can be taken out of the receiving hole 212 in turn, so as to manually release the lock of the limiter 240 on the first piston 220.

[0024] As a preferred embodiment, please refer to Figure 3 The first blocking unit 200 also includes a first sealing ring 260, which is sleeved on the outer wall of the first piston 220 and is used to abut against the hole wall of the receiving hole 212, thereby preventing the liquid fire extinguishing agent from leaking from the gap between the first piston 220 and the hole wall of the receiving hole 212.

[0025] As a preferred embodiment, please refer to Figure 2 The first blocking unit 200 further includes a first bracket 270, which is fixedly connected to the first end cover 210 and is also used to be detachably fixed to a fixed object to facilitate installation of the fire extinguishing device.

[0026] As a preferred embodiment, please refer to Figure 2 and Figure 4The second blocking unit 300 includes a blocking body 310 and a second piston 320. The blocking body 310 is detachably arranged at the opening of the other end of the liquid storage chamber 110 to block the opening of the other end of the liquid storage chamber 110. The blocking body 310 has a receiving chamber 311 extending along the length direction of the cylinder 100. The outer end of the receiving chamber 311 is an opening, and the inner end of the receiving chamber 311 is a sealing setting. At least one first flow hole 312 communicating with the receiving chamber 311 and at least one second flow hole 313 communicating with the receiving chamber 311 are opened on the inner end of the blocking body 310. Each of the first flow holes 312 and each of the second flow holes 313 are also connected to the liquid storage chamber 110. The second piston 320 is sealingly and slidably arranged in the receiving chamber 311 to separate the first space 3111 and the second space 3112 from the inside to the outside in the receiving chamber 311. The air pressure in the liquid storage chamber 110 can push the second piston 320 to reach the first position. When the second piston 320 is located at the first position, each of the first flow holes 312 and each of the second flow holes 313 are connected to the first space 3111. Since the liquid fire extinguishing agent is easy to vaporize, there will be a part of the gaseous fire extinguishing agent in it. This part of the air pressure will act on the second piston 320 to push the second piston 320 to the first position. At the same time, double piston sealing is adopted, and the sealing effect is better.

[0027] As a preferred embodiment, please refer to Figure 2 and Figure 4 The blocking body 310 includes a central tube 314, a second end cover 315 and a sealing cover 316. The central tube 314 is arranged in the liquid storage chamber 110, and both ends of the central tube 314 are opened. The second end cover 315 is fixedly sleeved on the outer end of the central tube 314, and is detachably covered at the opening of the other end of the liquid storage chamber 110. The sealing cover 316 is detachably covered at the opening of the inner end of the central tube 314 to enclose the accommodating chamber 311 with the central tube 314. Each of the first flow holes 312 and each of the second flow holes 313 are opened on the sealing cover 316, which is convenient for disassembling the blocking body 310 to replace the second piston 320.

[0028] As a preferred embodiment, please refer to Figure 4 The blocking body 310 also includes a second sealing ring 317, which is clamped in the middle hole of the second end cover 315 and abuts against the central tube 314, so as to seal the gap between the inner wall of the second end cover 315 and the outer wall of the central tube 314.

[0029] As a preferred embodiment, please refer to Figure 4The second blocking unit 300 also includes a third sealing ring 330, which is sleeved on the outer wall of the second piston 320 and is used to abut against the tube wall of the center tube 314 and the cavity wall of the receiving chamber 311, so as to prevent the liquid fire extinguishing agent from leaking from the gap between the second piston 320 and the tube wall of the center tube 314 and the cavity wall of the receiving chamber 311.

[0030] As a preferred embodiment, please refer to Figure 2 and Figure 4 The gas generating unit 400 is arranged in the receiving chamber 311 and is located in the second space 3112. The high-pressure nitrogen generated by the gas generating unit 400 can push the second piston 320 to the second position. When the second piston 320 is located in the second position, each of the first flow holes 312 is connected to the first space 3111, and each of the second flow holes 313 is connected to the second space 3112. The gas generating unit 400 is arranged in the receiving chamber 311, and the gas generating unit 400 and the liquid fire extinguishing agent can be placed in two different spaces via the second piston 320. During the storage of the device, the gas generating unit 400 does not come into contact with the liquid fire extinguishing agent, thereby avoiding the influence of the liquid fire extinguishing agent on the solid gas generating agent, and ensuring the normal gas production effect of the solid gas generating agent after being excited.

[0031] As a preferred embodiment, please refer to Figure 4 , each of the first flow holes 312 extends along the length direction of the cylinder 100, and each of the second flow holes 313 extends in a length direction perpendicular to the cylinder 100. The gas in the liquid storage chamber 110 will enter the first space 3111 along each of the first flow holes 312, and vertically push the second piston 320. When the gas generating unit 400 is started, the high-pressure nitrogen generated will push the second piston 320 to the second position, and the high-pressure nitrogen can enter the liquid storage chamber 110 through each of the second flow holes 313.

[0032] As a preferred embodiment, please refer to Figure 2 The second blocking unit 300 further includes a second bracket 340, which is fixedly connected to the second end cover 315 and is also used to be detachably fixed to a fixed object to facilitate installation of the fire extinguishing device.

[0033] As a preferred embodiment, please refer to Figure 4 and Figure 5The gas generating unit 400 includes a substrate 410, a gas generating charge 420, an ignition charge 430 and an electric starter 440. The substrate 410 is detachably arranged at the opening of the outer end of the receiving chamber 311 and is located in the second space 3112 to block the opening of the outer end of the receiving chamber 311. The substrate 410 has a combustion chamber 411 extending along the length direction of the cylinder 100. The outer end of the combustion chamber 411 is an opening, and the inner end of the combustion chamber 411 is a sealing setting. A release hole 412 connected to the combustion chamber 411 is opened on the substrate 410, and the release hole 412 is also connected to the second space 3112. The gas generating charge 420, the ignition charge 430 and the electric starter 440 are fixed in the combustion chamber 411 from the inside to the outside, and the ignition charge 430 is connected to the gas generating charge 420. The gas charge column 420 is fixedly connected, and the electric starter 440 is electrically connected to the circuit system via a wire. After the electric starter 440 is energized, sparks can be generated, and the ignition powder 430 is ignited by the sparks, and then the gas-producing charge column 420 is ignited by the ignition powder 430. The high-pressure nitrogen generated by the gas-producing charge column 420 pushes the second piston 320 to the second position. At this time, each of the second flow holes 313 is connected to the second space 3112, and the high-pressure nitrogen passes through the release hole 412 to enter the second space 3112, and then passes through each of the second flow holes 313 to enter the liquid storage chamber 110. Under the push of the high-pressure nitrogen, the liquid fire extinguishing agent pushes the first piston 220 away from the orifice of the drainage hole 214, and the liquid fire extinguishing agent is ejected. The gas-producing charge column 420 is a composite solid propellant and can ultrasonically generate nitrogen.

[0034] As a preferred embodiment, please refer to Figure 4 and Figure 5The base 410 includes a combustion tube 413, a mounting ring 414 and a mounting seat 415. The combustion tube 413 is arranged in the second space 3112, and the outer end of the combustion tube 413 is an open setting, and the inner end of the combustion tube 413 is a sealed setting. The combustion chamber 411 is formed in the combustion tube 413. The release hole 412 is opened on the combustion tube 413. The mounting ring 414 is detachably covered at the opening of the outer end of the combustion tube 413 and is detachably fixed to the second end cover 315. The mounting seat 415 is detachably arranged. In the middle hole of the mounting ring 414, the mounting seat 415 has a mounting cavity 4151 connected to the combustion chamber 411. The electric starter 440 is detachably fixed in the mounting cavity 4151 and is used to seal the mounting cavity 4151. The lead wire of the electric starter 440 passes through the mounting cavity 4151 and extends out of the combustion chamber 411, so as to facilitate the replacement of the gas-producing charge 420, the ignition charge 430 and the electric starter 440, and also prevent the high-pressure gas generated by the combustion from being ejected along the opening at the outer end of the combustion tube 413.

[0035] As a preferred embodiment, please refer to Figure 4 and Figure 5 The base 410 also includes a fourth sealing ring 416 and a fifth sealing ring 417. The fourth sealing ring 416 is clamped on the surface of the mounting ring 414 and abuts against the second end cover 315. The fifth sealing ring 417 is sleeved on the outer wall of the mounting seat 415 and abuts against the hole wall of the middle hole of the mounting ring 414. The fourth sealing ring 416 can prevent high-pressure nitrogen from leaking from the gap between the mounting ring 414 and the second end cover 315, and the fifth sealing ring 417 can prevent high-pressure nitrogen from leaking from the gap between the outer wall of the mounting seat 415 and the hole wall of the middle hole of the mounting ring 414.

[0036] As a preferred embodiment, the liquid fire extinguishing agent is one of perfluorohexanone and trifluoropropylene (2-BTP) or a mixture of the two.

[0037] In order to better understand the present invention, the following Figure 1 - Figure 5 The working principle of the technical solution of the present invention is described in detail: When a fire occurs, the fire extinguishing device receives an electrical signal to start. After the electric starter 440 is powered on, sparks can be generated, and the ignition powder 430 is ignited by the sparks, and the gas generating powder column 420 is ignited by the ignition powder 430. The high-pressure nitrogen generated by the gas generating powder column 420 passes through the release hole 412 into the second space 3112, pushing the second piston 320 to the second position. At this time, each of the second flow holes 313 is connected to the second space 3112, and the high-pressure nitrogen in the second space 3112 passes through each of the second flow holes 313. The second flow hole 313 enters the liquid storage chamber 110. The liquid fire extinguishing agent, driven by the high-pressure nitrogen, pushes the first piston 220 to move away from the orifice of the discharge hole 214, and the liquid fire extinguishing agent is sprayed out. The non-pressure storage type fire extinguishing device uses a piston plus a spring instead of a bursting disc to seal the outlet, which has higher sealing performance. The outlet opening pressure can be adjusted by selecting the spring stiffness, which solves the problem of fire extinguishing agent leakage caused by the loose sealing of traditional bursting discs, and also solves the problem of fatigue fracture of conventional bursting discs due to water hammer in a vibration environment.

[0038] The non-pressure storage type fire extinguishing device provided by the present invention has the following beneficial effects: (1) The non-pressure storage type fire extinguishing device solves the problem that the traditional fire extinguishing device can only be placed upright but not horizontally. The non-pressure storage type fire extinguishing device has no internal pressure when not working, which solves the potential leakage risk and regular inspection problem of the traditional pressure storage type fire extinguishing device. The pressure in the bottle can be reduced when not working, thereby making it safer and eliminating the need for regular maintenance. In addition, the gas-generating column 420 is used to generate pure nitrogen, and the generated pure nitrogen is sprayed onto the protected object without causing damage to the protected object. (2) During the storage of the device, the gas generating charge 420 does not come into contact with the liquid fire extinguishing agent, thereby preventing the liquid fire extinguishing agent from affecting the gas generating charge 420 and ensuring the normal gas generating effect of the gas generating charge 420 after being stimulated; (3) This non-pressure storage fire extinguishing device uses a piston plus a spring instead of a bursting disc to seal the outlet, which has a higher sealing performance. The outlet opening pressure can be adjusted by selecting the spring stiffness, which solves the problem of fire extinguishing agent leakage caused by the poor sealing of traditional bursting discs. It also solves the problem of fatigue fracture of conventional bursting discs due to water hammer in a vibrating environment.

[0039] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A non-pressure storage type fire extinguishing device, characterized in that: include: The cylinder has a liquid storage cavity, both ends of which are open, and the liquid storage cavity is used to contain liquid fire extinguishing agent; A first blocking unit, comprising a first end cover, a first piston and an elastic member, wherein the first end cover is detachably disposed at an opening at one end of the liquid storage chamber, the first end cover has a liquid discharge passage communicating with the liquid storage chamber, and both ends of the elastic member are respectively connected to the first end cover and the first piston, so that the first piston is sealingly slidably disposed in the liquid discharge passage; A second blocking unit, used to block the opening at the other end of the liquid storage chamber; The gas generating unit is used to generate high-pressure nitrogen and allow the high-pressure nitrogen to enter the liquid storage chamber.

2. The non-pressure storage type fire extinguishing device according to claim 1, characterized in that: The first end cover is provided with a receiving hole, a liquid inlet hole and a liquid discharge hole, the receiving hole extends in a direction perpendicular to the length of the cylinder, the liquid inlet hole and the liquid discharge hole both extend in the length of the cylinder, one end of the liquid inlet hole is communicated with one end of the receiving hole, and one end of the liquid discharge hole is communicated with the middle of the receiving hole, the receiving hole, the liquid inlet hole and the liquid discharge hole form the liquid discharge channel, the first piston and the elastic member are both arranged in the receiving hole and located at the other end of the receiving hole, and the elastic member is used to seal the first piston at the opening of the liquid discharge hole.

3. The non-pressure storage type fire extinguishing device according to claim 2, characterized in that: The first blocking unit also includes a limiter, which is fixed in the receiving hole and located at the other end of the receiving hole. One end of the elastic member is fixedly connected to the limiter. When the liquid fire extinguishing agent pushes the first piston to move away from the orifice of the drainage hole, the limiter is connected to the first piston to lock the first piston.

4. The non-pressure storage type fire extinguishing device according to claim 3, characterized in that: The first blocking unit also includes a plug. The other end of the receiving hole is a sealing device. The plug is arranged in the receiving hole and located at the other end of the receiving hole for blocking the other end of the receiving hole. The plug is detachably fixed to the first end cover, and the limiter is fixed on the plug.

5. The non-pressure storage type fire extinguishing device according to claim 1, characterized in that: The second blocking unit includes a blocking body and a second piston. The blocking body is detachably arranged at the opening at the other end of the liquid storage chamber to block the opening at the other end of the liquid storage chamber. The blocking body has a receiving chamber extending along the length direction of the cylinder, the outer end of the receiving chamber is an opening, and the inner end of the receiving chamber is a sealing setting. At least one first flow hole connected to the receiving chamber and at least one second flow hole connected to the receiving chamber are opened on the inner end of the blocking body. Each of the first flow holes and each of the second flow holes are also connected to the liquid storage chamber. The second piston is sealingly slidably arranged in the receiving chamber to separate the first space and the second space from the inside to the outside in the receiving chamber. The air pressure in the liquid storage chamber can push the second piston to reach the first position. When the second piston is in the first position, each of the first flow holes and each of the second flow holes are connected to the first space.

6. The non-pressure storage type fire extinguishing device according to claim 5, characterized in that: The blocking body includes a central tube, a second end cover and a sealing cover. The central tube is arranged in the liquid storage cavity, and both ends of the central tube are opened. The second end cover is fixedly sleeved on the outer end of the central tube, and is detachably covered at the opening at the other end of the liquid storage cavity. The sealing cover is detachably covered at the opening at the inner end of the central tube to enclose the receiving cavity with the central tube, and each of the first flow holes and each of the second flow holes are opened on the sealing cover.

7. The non-pressure storage type fire extinguishing device according to claim 6, characterized in that: The gas generating unit is arranged in the containing cavity and is located in the second space. The high-pressure nitrogen generated by the gas generating unit can push the second piston to the second position. When the second piston is located at the second position, each of the first flow holes is connected to the first space, and each of the second flow holes is connected to the second space.

8. The non-pressure storage type fire extinguishing device according to claim 7, characterized in that: Each of the first flow holes extends along the length direction of the cylinder, and each of the second flow holes extends in a direction perpendicular to the length direction of the cylinder.

9. The non-pressure storage type fire extinguishing device according to claim 7, characterized in that: The gas generating unit includes a substrate, a gas-producing charge, an ignition charge and an electric starter. The substrate is detachably arranged at the opening at the outer end of the accommodating chamber and is located in the second space, and is used to block the opening at the outer end of the accommodating chamber. The substrate has a combustion chamber extending along the length direction of the cylinder, the outer end of the combustion chamber is an opening, and the inner end of the combustion chamber is a sealing setting. A release hole connected to the combustion chamber is opened on the substrate, and the release hole is also connected to the second space. The gas-producing charge, the ignition charge and the electric starter are fixed in the combustion chamber from the inside to the outside, and the ignition charge is fixedly connected to the gas-producing charge. The electric starter is electrically connected to the circuit system via a wire.

10. The non-pressure storage type fire extinguishing device according to claim 9, characterized in that: The base includes a combustion tube, a mounting ring and a mounting seat. The combustion tube is arranged in the second space, and the outer end of the combustion tube is open, and the inner end of the combustion tube is sealed. The combustion chamber is formed in the combustion tube. The mounting ring is removably covered at the opening of the outer end of the combustion tube and is removably fixed to the second end cover. The mounting seat is removably arranged in the center hole of the mounting ring. The mounting seat has a mounting cavity connected to the combustion chamber. The electric starter is removably fixed in the mounting cavity and is used to seal the mounting cavity. The wire post of the electric starter passes through the mounting cavity and extends out of the combustion cavity.

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