WO2023030552A1 - Fire extinguisher - Google Patents

Abstract

Provided is a fire extinguisher, which belongs to the technical field of emergency response, and comprises: a main body, which is used for accommodating a fire extinguishing medium; a pressure storage tube, which is provided within the main body, has a release member, and is used to store a high-pressure gas; a sealed spray mechanism, which is used for spraying the fire extinguishing medium; and a trigger, which is used for triggering the release member to release the high-pressure gas, thereby pushing the fire extinguishing medium to spray out from the sealed spray mechanism. The main body has a top portion opening and a bottom portion opening, the sealed spray mechanism is disposed at the bottom portion of the main body and seals the bottom portion opening, and the trigger is disposed at the top portion of the main body and seals the top portion opening. The fire extinguisher has a simple structure, and is easily processed in a large-scale and modularized means, and may significantly improve quality consistency.

Description

fire extinguisher technical field

The invention belongs to the field of emergency technology, and relates to a fire-fighting product, in particular to a fire extinguisher.

Background technique

A fire extinguisher usually consists of a cylinder containing a pressurized fire extinguishing medium, and components such as a siphon, a spray hose, a handle, a pressure handle, a pressure indicator, a head or a valve, and the spraying process is only a few seconds or tens of seconds when used. , and the cylinder needs to be kept under pressure throughout its life cycle, which has great danger. In order to ensure the strength of the cylinder and improve safety, the cylinders of existing fire extinguishers are all made of metal materials, and such cylinders are easy to corrode, resulting in thinning of the wall and potential dangers such as explosion. At present, conventional fire extinguishers contain components such as siphon tubes, pressure indicators, device heads, or valves. Long-term pressure and quality problems are likely to cause leakage and safety accidents. Storage pressure fire extinguisher, the high-pressure gas cylinder is separated from the fire extinguishing agent cylinder, and still has the necessary components of the fire extinguisher such as the siphon and the head. At present, the cylinders of fire extinguishers are all welded, and the high-pressure gas cylinders are also hot-drawn, so the quality is difficult to control and is strictly controlled by regulatory agencies. The fire extinguishers of the existing structure need to be placed vertically and specially fixed, so they are not suitable for household or vehicle placement, and the use is relatively complicated, especially not suitable for children and the elderly to operate. In addition, the filling and maintenance of existing fire extinguishers are prone to safety accidents due to pressurized operations, which require professional training and manufacturer's permission.

Contents of the invention

In order to solve the above problems, a fire extinguisher is provided. The body no longer maintains a pressurized state for a long time, and at the same time, it is completely different from the existing pressure storage type fire extinguisher in structure. The present invention adopts the following technical solutions:

The present invention provides a fire extinguisher, which is characterized in that it includes: a body for containing fire extinguishing medium; a pressure storage tube, arranged in the body, with a release piece for storing high-pressure gas; a sealed injection mechanism, used for spraying fire extinguishing medium and a trigger, which is used to trigger the release part to release the high-pressure gas, thereby pushing the fire extinguishing medium to spray out from the sealed injection mechanism, wherein the body has a top opening and a bottom opening, the sealed injection mechanism is arranged at the bottom of the body and seals the bottom opening, and the trigger Set on top of the body and seal the top opening.

The fire extinguisher provided by the present invention may also have such technical features, wherein the pressure storage tube includes a pressure storage tube body, the pressure storage tube body has an inner chamber for storing high-pressure gas, and the pressure storage tube body is a pressure tube or a hollow rod.

The fire extinguisher provided by the present invention can also have such technical features, wherein the sealed injection mechanism has a spout formed by processing the bottom of the body and a one-way valve connected to the spout arranged on the bottom of the body by sealing, and the spout is used to spray the fire extinguishing medium .

The fire extinguisher provided by the present invention may also have such technical features, wherein the sealing injection mechanism has a nozzle formed by processing the bottom of the body and a sealing film sealed at the bottom of the body, and the nozzle is used to spray the fire extinguishing medium.

The fire extinguisher provided by the present invention may also have such a technical feature, wherein the sealing injection mechanism is a membrane nozzle, and the membrane nozzle is a nozzle with a sealing membrane.

The fire extinguisher provided by the present invention can also have such technical features, wherein the sealing injection mechanism is a one-way nozzle with a nozzle, the one-way nozzle is a nozzle with a one-way valve, the one-way valve communicates with the nozzle, and the one-way nozzle Seal the bottom opening.

The fire extinguisher provided by the present invention can also have such technical characteristics, wherein the sealing injection mechanism includes a connected nozzle and a one-way valve, the one-way valve seals the bottom opening, and the nozzle communicates with the outside world for spraying the fire extinguishing medium.

The fire extinguisher provided by the present invention can also have such technical features, wherein the pressure storage tube has an air outlet, the release member is a sealing diaphragm arranged at the air outlet, and the trigger has a thimble, and the thimble pierces the sealing diaphragm when in use Release the high-pressure gas from the gas outlet. In this case, the high pressure gas will be released all at once.

The fire extinguisher provided by the present invention can also have such technical features, wherein the pressure storage tube has an air outlet, the release member is a valve core arranged at the air outlet for charging and releasing gas, the trigger has a push rod, and the push rod It is used to push open the valve core to release high-pressure gas from the air outlet when in use. When this structure is adopted, since the valve core can be opened and closed repeatedly, the fire extinguisher of the present invention can be released multiple times.

The fire extinguisher provided by the present invention can also have such technical features, wherein the bottom of the pressure storage tube is provided with a pressure gauge, the pressure gauge passes through the bottom of the body and is sealed and connected with the pressure storage tube and the bottom of the body, and the pressure gauge is used to display to the user The pressure value in the pressure storage pipe.

The fire extinguisher provided by the present invention may also have such technical features, wherein the fire extinguishing medium is a water-based fire extinguishing agent or a liquid chemical fire extinguishing agent.

The fire extinguisher provided by the present invention can also have such technical features, wherein, the material of the body is a non-metallic material that can withstand the pressure when released, including any one or more of glass, plastic, resin or composite materials that can withstand pressure The combination.

The fire extinguisher provided by the present invention can also have such technical features, wherein a piston is arranged in the body, which divides the interior of the body into an upper chamber and a lower chamber, which is used to allow the high-pressure gas released from the pressure storage tube to act on the fire extinguishing medium evenly , so that when the fire extinguisher is at any angle, the fire extinguishing medium can be sprayed out through the sealed injection mechanism.

The fire extinguisher provided by the present invention may also have such a technical feature, wherein the body is integrally formed, and the material of the body is a metal material, including any one of steel and aluminum alloy or a combination of both. Further, in the fire extinguisher provided by the present invention, when the body, the top and the bottom are partially made of metal thin-walled parts, the sealing effect can also be achieved through the seam sealing process, so it is not necessary to use high-cost technologies such as processing threads and O-rings.

Invention function and effect

According to the fire extinguisher of the present invention, since the pressure storage tube is arranged inside the body, the fire extinguisher has a trigger and a sealed injection mechanism. When the trigger is manually pressed to release the high-pressure gas in the pressure storage tube to release and push the fire extinguishing medium to be sprayed from the sealed injection mechanism, Therefore, when the fire extinguisher is not in use, there is no pressure in the body, that is to say, the body no longer maintains a pressurized state for a long time, which improves the safety of the fire extinguisher; since there is no pressure in the body when not in use, it can be used other than metal The main body is made of materials (such as glass, etc.) to avoid safety problems caused by the thinning of the main body wall after metal corrosion. In addition, because the high-pressure gas can be released through the trigger to push the fire extinguishing medium to spray out from the spray head, there are no siphon pipes and nozzle heads in the fire extinguisher of the present invention, and the fire extinguishing agent is liquid and easy to flow. Therefore, the placement position of the fire extinguisher is not limited (for example, it can be placed horizontally), and it is suitable for home and vehicle placement, as long as the recommended angle is maintained during use. When the body of the fire extinguisher is provided with a piston, the fire extinguisher can spray at any angle. Not only that, since the body and the top cover of the fire extinguisher, and between the base and the body are connected by threads, no special processing equipment is required, and the production can be realized only by simple machining, and the processing is simple. In the field of pressure vessels and fire protection, steel cylinders under pressure and fire extinguisher cylinders require spinning, hot drawing and welding, which are difficult to ensure consistent quality. They are strictly regulated and require special permits or strict supervision and inspection. Manufacturers of portable fire extinguishers or simple fire extinguishers need to be equipped with a large number of stamping dies, automatic welding production lines, surface treatment equipment, etc., resulting in large investment, serious pollution and high energy consumption. The technology mentioned in this patent eliminates the pain point of the existing technology that requires personnel to intervene in production by changing the structure of the fire extinguisher, minimizes the difficulty and cost of manufacturing, and significantly improves the quality consistency of the product through the large-scale production of automated machines.

Description of drawings

Fig. 1 is a schematic cross-sectional view of a fire extinguisher in Embodiment 1 of the present invention;

2 is a schematic cross-sectional view of a fire extinguisher with a hollow piston in Embodiment 2 of the present invention;

Fig. 3 is a partial enlarged view of B in Fig. 2;

Fig. 4 is a schematic cross-sectional view of a fire extinguisher in Modification 1 of the present invention;

5 is a schematic cross-sectional view of a fire extinguisher with a pressure gauge in Modification 2 of the present invention;

Fig. 6 is a partial enlarged view of C in Fig. 5;

Fig. 7 is a schematic cross-sectional view of a fire extinguisher in Modification 3 of the present invention.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the composition, working principle and beneficial effects of the fire extinguisher provided by the present invention will be described in detail below in conjunction with the embodiments and accompanying drawings.

<Example 1>

Fig. 1 is a schematic cross-sectional view of a fire extinguisher in Embodiment 1 of the present invention.

As shown in FIG. 1 , this embodiment provides a fire extinguisher 100, which includes a body 1a, a pressure storage tube 3a and a trigger 4a. A certain quality of high-pressure gas is stored in the pressure storage pipe 3a.

In this embodiment, the high-pressure gas is carbon dioxide gas, and in other embodiments, the high-pressure gas may also be nitrogen or argon.

The body 1a has a tubular structure with partial openings at the top and bottom, and contains a fire extinguishing medium M inside. The fire extinguishing medium M is a water-based fire extinguishing agent or a liquid chemical fire extinguishing agent. In this embodiment, the cross section of the body 1a is circular, and in other embodiments, the cross section can also be non-circular such as ellipse, rectangle and rhombus. In this embodiment, the material of the body 1a is glass that can withstand the pressure when it is released. In other embodiments, the material of the body 1a can also be plastic, resin or composite materials that can withstand short-term pressure, and the body can be Mold parts, one-piece molding.

The bottom of the body 1a is provided with a sealing injection mechanism. In this embodiment, the sealing injection mechanism has a spout 13 directly processed on the bottom of the body and a one-way valve 12 that is sealed at the bottom of the body and communicates with the spout 13 . The one-way valve 12 is a reusable component, and the optimum atomization pressure value of the fire extinguishing medium M can be ensured by setting the minimum opening pressure of the one-way valve 12 .

In other embodiments, the sealing injection mechanism can also have a spout and a sealing film processed directly on the bottom of the body, or it can be a membrane nozzle, which is a nozzle with a sealing membrane. If the sealing membrane is provided, then The fire extinguisher 100 is a disposable fire extinguisher. The sealing injection mechanism can also be a one-way nozzle, and the one-way nozzle is a nozzle with a one-way valve, or the sealing injection mechanism includes a one-way valve and a nozzle at the same time. At this time, the one-way valve is used for sealing, and the fire extinguishing medium is sprayed from the nozzle. .

The one-way valve 12 is adjacent to and communicates with the nozzle 13, and the nozzle 13 is connected with the atmosphere, and the fire extinguishing medium M in the main body 1a can be sprayed from the nozzle 13 through the one-way valve 12. There is a hole or flow channel for installing the one-way valve 12 at the bottom of the body, the hole or flow channel communicates with the outside world, and the port communicating with the outside is processed into a nozzle 13, which facilitates the atomization and spraying of the fire extinguishing medium M. If the nozzle is used as an independent component to replace the function of the nozzle 13, the nozzle can be made of metal or non-metal, and is a replaceable modular component, which is convenient for processing and setting different technical performances. In this embodiment, when the fire extinguisher 100 is sprayed, the bottom of the main body 1a needs to be aimed downward at the flame, and maintain a certain inclination angle, so as to ensure that the fire extinguishing medium M is effectively sprayed and completely pressed out by the gas. More preferably, the spray head can also be connected to the bottom of the body through a special connecting piece, so as to overcome the disadvantage that the direction of the body and the sprayed medium are the same. That is, when the fire extinguisher is held vertically or at a small oblique angle, the spray medium can be aimed at the flame at a large oblique angle.

The specially processed or formed structure at the nozzle 13 is a structure that can effectively atomize and spray the fire extinguishing agent, and the fire extinguishing medium M is sprayed directly through the nozzle after passing through the one-way valve 12 .

In other embodiments, the sealing film may not be arranged at the nozzle, but the nozzle is arranged at the nozzle, and the nozzle and the sealing film are arranged in a staggered manner, that is, not on the same axis. The fire extinguishing medium first flows out through the sealing film, then flows through the inclined hole, and then Spray through the nozzle.

The top of the body 1a has a mounting hole 21 extending in the axial direction of the body 1a.

The pressure storage pipe 3a includes a tubular pressure storage pipe body 30a, a bottom plug 23 and a release member. The pressure storage tube 3a can extend to the bottom of the body 1a, or it can be suspended in the body 1a, and the bottom can be sealed by the bottom plug 23, or it can be a round rod with one end closed, while the top is sealed by the release piece and connected with the trigger. The device 4a cooperates to release the gas.

In this embodiment, the pressure accumulator tube body 30a is a circular tube, which is arranged in the body 1a, and high-pressure gas carbon dioxide is stored therein.

The bottom plug 23 is arranged at the bottom of the pressure accumulator tube body 30a, and has a cap portion 231 and a plug connecting portion 232 connected to the cap portion 231, wherein the plug coupling portion 232 is fixedly connected to the pressure accumulator tube body 30a by threading . In this embodiment, an annular sealing member 38 is provided at the bottom end surface of the pressure accumulating tube body 30a. After installation, the sealing member 38 is pressed by the bottom plug 23 and the end surface of the pressure accumulating tube body 30a to form a seal.

The top of the pressure accumulator tube body 30a is provided with a release piece, and the release piece includes a top plug 22 , a mounting piece 24 and a sealing diaphragm 25 . A top plug 22 is disposed in the mounting hole 21 , and the trigger 4 a is mounted on the top plug 22 .

The mounting part 24 is fixedly connected with the pressure storage tube body 30a by threading. An annular sealing ring is provided on the inner wall of the top end of the pressure accumulating tube body 30a, and the sealing ring is pressed against the outer wall of the mounting part 24 and the inner wall of the pressure accumulating tube body 30a to form a seal. The mounting part 24 has a groove extending to the inside of the pressure accumulator tube body 30a, and the top plug 22 is screwed and fixedly installed in the groove of the mounting part 24, and compresses the sealing diaphragm 25.

The bottom of the groove of the mounting part 24 is provided with a through hole communicating with the inside of the pressure storage tube 3 a and a sealing diaphragm 25 sealing the through hole. The gas is released when the sealing membrane 25 is pierced by the needle. When the sealing membrane 25 is not punctured, the release member is used to seal the gas in the pressure accumulating tube 3a.

The top plug 22 is provided with a through hole coaxial with the through hole on the mounting part 24 . The trigger 4 a is mounted in the through hole of the top plug 22 .

The top plug 22 is also provided with a through hole in the top plug 22 and an air guide hole 26 inside the main body 1a for guiding the gas to flow into the main body 1a.

The high-pressure gas G passes through the through hole on the mounting part 24, the through hole on the top plug 22, and the air guide hole 26 on the top plug 22 in sequence, and then enters the inner cavity of the main body 1a.

The trigger 4 a is arranged on the top plug 22 and has a trigger seat 41 , a trigger control part 42 and a safety device 43 .

The outer wall of trigger seat 41 is provided with external thread, and the inner wall of the top of top plug 22 is provided with the internal thread that matches with trigger seat 41, makes trigger seat 41 be connected on the top plug 22 by thread engagement.

The trigger control member 42 includes a push rod 421 , a button 422 and a thimble 423 .

The trigger seat 41 has a push rod installation hole for the push rod 421 to pass through. The push rod installation hole is a smooth inner wall, and a groove is arranged on it. In the groove, there is a seal that cooperates with the outer wall of the push rod 421 to form a seal. Push rod sealing ring 413. The push rod 421 is inserted into the push rod installation hole, and the seal ring 413 of the push rod is squeezed to form a seal to prevent the high-pressure gas from leaking from the top.

The button 422 is mounted on the end of the push rod 421 exposed from the top plug 22 , and is used for the user to press, so as to push the push rod 421 to move towards the sealing diaphragm 25 . The thimble 423 is arranged at the other end of the push rod 421, and when the push rod 421 moves toward the sealing diaphragm 25, it can pierce the sealing diaphragm 25 driven by the push rod 421, thereby releasing the high pressure stored in the pressure storage tube 3a Gas G.

The portion of the push rod 421 exposed from the top plug 22 is provided with a pin hole extending along a direction perpendicular to the length of the push rod 421 . The safety device 43 is a rod-shaped structure inserted into the pin hole to prevent the push rod 421 from moving, thereby preventing the trigger 4a from being falsely triggered.

A step extending radially along the push rod 421 is provided between the thimble 423 and the push rod 421. The end surface of the step close to the push rod 421 fits on the bottom of the trigger seat 41, so that the push rod 421 cannot move away from the pressure storage tube. 3a, but can only move in a direction close to the pressure storage tube 3a, so as to prevent the push rod 421 from being pulled out.

When using the fire extinguisher 100 of the embodiment, first, the user pulls out the safety device 43, and then presses the button 422, so that the push rod 421 and the thimble 423 move toward the sealing diaphragm 25 together, and the thimble punctures the sealing diaphragm 25 The high-pressure gas G stored in the pressure storage cylinder 31 is released and enters the main body 1 a through the air guide hole 26 . Due to the entry of high-pressure gas G, the pressure in the main body 1a continues to rise, pushing the liquid fire extinguishing medium M to push open the one-way valve 12, and the fire extinguishing medium M in the main body 1a is atomized through the nozzle 13 and sprayed out to realize spray fire extinguishing.

Function and effect of embodiment

According to the fire extinguisher of this embodiment, the pressure storage tube is arranged inside the body, so that when the fire extinguisher is not in use, there is no pressure in the body, that is to say, the body no longer maintains a pressurized state for a long time, which improves the safety of the fire extinguisher; There is no pressure, so the body can be made of materials other than metal (such as glass, plastic and resin, etc.) to avoid the thinning of the body wall after metal corrosion; since there are no siphon tubes and other components, the fire extinguisher can be placed horizontally, suitable for It can be placed in household and vehicles; since all parts of the fire extinguisher are connected by threads, no special processing equipment is needed, and the production can be realized only by simple machining, and the processing is simple.

In addition, since the connection between the top plug and the body, between the trigger and the top plug, and between the pressure storage tube and the pipe plug, and the installation parts are all connected by threads, and sealed by the corresponding sealing ring or sealant, or when the body When metal thin-walled parts are used with the top and bottom, the rolling sealing process can be used, and the overall connection of the fire extinguisher no longer has welding connections, which is essentially different from the welding or hot-drawing technology of the existing fire extinguisher cylinder. Therefore, it can be manufactured by conventional processing methods such as drilling, tapping/threading, etc., which reduces the production cost. At the same time, because the threaded connection is easy to disassemble, after the fire extinguishing medium in the body is sprayed and consumed, new fire extinguishing medium can be quickly added and a new pressure storage tube can be replaced by removing the top cover, making the fire extinguisher easy to recycle. Without professional maintenance.

In addition, a safety device is provided in the pin hole on the push rod. When the safety device is not pulled out, the user cannot press the button to push the push rod to move. Therefore, false triggering of the fire extinguisher can be effectively prevented.

In addition, the components of the pressure storage pipe in this embodiment are easy to obtain and process, and are not seamless high-pressure steel cylinders or aluminum cylinders that are mass-produced with high investment. Therefore, when producing the fire extinguisher of this embodiment, a large number of its components are mature and easy-to-process outsourced parts, and different capacity bodies and pressure storage tubes can be selected according to needs for outsourcing of production and manufacturing, without the need to configure a large number of special processing equipment . Change the structure of the fire extinguisher, change welding and other heat processing technology to mechanical processing technology, so that the large-scale production of fire extinguishers can be implemented through production outsourcing, and at the same time, the consistency of product quality can be greatly improved.

<Example 2>

Fig. 2 is a schematic cross-sectional view of a fire extinguisher with a hollow piston in Embodiment 2 of the present invention. In the present embodiment, the same structures as in the first embodiment are given the same reference numerals and the same descriptions are omitted.

The fire extinguisher in this embodiment has multiple release functions.

As shown in FIG. 2 , this embodiment provides a fire extinguisher 200 , which includes a body 1b, a top cover 2b, a pressure storage tube 3b, a trigger 4b and a base 5b.

The main body 1b has a circular tubular structure, and contains the same fire extinguishing medium M as in the first embodiment.

The top of the body 1b is provided with internal threads on the inner wall close to its end surface, and the outer wall of the top cover 2b is provided with external threads matching the top of the body 1b, and the top cover 2b and the body 1b are connected by thread engagement. In other embodiments, internal threads can also be provided on the inner wall of the top cover 2b, and matching external threads can be provided on the outer wall of the main body 1b, so as to realize the threaded connection between the top cover 2b and the main body 1b, that is, the top cover 2b It is a cap-shaped structure and is threadedly connected with the main body 1b.

On the inner wall of the main body 1b, adjacent to the internal thread, there is provided a top cover sealing ring 11 that cooperates with the outer wall of the top cover 2b for sealing. The end of the top cover 2b is provided with a groove, and the top cover sealing ring 11 is arranged in the groove. The top cover 2b squeezes the top cover sealing ring 11 to realize the sealing between the main body 1b and the top cover 2b. In other embodiments, grooves can also be provided on the inner wall of the body 1b. In other embodiments, for the sealing between the main body 1b and the top cover 2b, existing technologies such as screw thread glue or interference fit or metal sheet rolling can be used instead of the above-mentioned solution of screw thread plus sealing ring.

As shown in FIG. 2 , the middle part of the top cover 2 b has a mounting hole 21 extending along the axial direction of the top cover 2 b, and an internal thread is provided on the inner wall of the mounting hole 21 .

The pressure storage tube 3 b is disposed in the main body 1 b and has a pressure storage tube body 34 , a top plug 35 and a bottom plug 36 .

The pressure storage pipe body 34 has a tubular structure, and high-pressure gas G is stored therein. Internal threads are provided on the inner walls of the top and bottom ends of the pressure storage pipe body 34 . In this embodiment, the high-pressure gas G is high-pressure nitrogen.

Fig. 3 is a partially enlarged view of B in Fig. 2 .

As shown in FIG. 2 and FIG. 3 , the structure of the top plug 35 of this embodiment is different from that of the top plug 23 of the first embodiment. Specifically, the top plug 35 includes two parts, namely a first part 35a and a second part 35b. The outer wall of the first part 35a is provided with an external thread matched with the internal thread on the mounting hole 21, and the top plug 35 and the top cover 2b are connected by thread engagement. The outer wall of the second part 35 b is provided with an external thread matched with the internal thread on the top of the pressure accumulator tube body 34 , and the top plug 35 and the pressure accumulator tube body 34 are connected by thread engagement. When the top plug 35 is inserted into the mounting hole 21 and the pressure accumulator tube body 34, the first part 35a and the second part 35b press the corresponding first sealing ring 11a and the second sealing ring 11b to form a seal.

When installing the top plug 35, first connect the top plug 35 to the pressure storage pipe body 34, that is, to connect the second part 35b of the top plug 35 to the pressure storage pipe body 34 by threading, and then connect the top plug 35 to the pressure storage pipe body 34. The first part 35a is connected with the installation hole 21 of the top cover 2b by threading.

As shown in FIG. 3 , the top plug 35 has an installation hole 351 extending axially along the top plug 35 and an air outlet 352 adjacent to the installation hole 351 . Air guide hole 353.

A release piece is disposed in the air outlet 352 . In this embodiment, the release member is a valve core 354 . When the valve core 354 is pushed back, the high-pressure gas in the pressure accumulator tube body 34 can enter the main body 1b from the gas outlet 352 through the air guide hole 353 . Therefore, the air guide hole 353 in this embodiment plays the same role as the air guide hole 26 in the first embodiment. In addition, through the valve core 354, the pressure accumulator tube 3b can be inflated and deflated multiple times.

The bottom plug 36 of this embodiment has the same structure as the bottom plug 23 of the first embodiment. At the same time, this embodiment also has a bottom plug sealing member 38, the installation method and function of which are the same as those of Embodiment 1, and will not be repeated here.

A hollow piston 15 is provided between the main body 1 b and the pressure accumulator tube body 34 . Ring grooves 16 are respectively provided on the inner and outer walls of the hollow piston 15 , and piston sealing rings 17 are respectively arranged in the two ring grooves 16 to cooperate with the inner wall of the body 1 b and the outer wall of the pressure accumulator tube body 34 for sealing. The piston sealing ring 17 on the outer wall of the hollow piston 15 forms a seal under the extrusion of the inner wall of the body 1 b , and the piston sealing ring 17 on the inner wall of the hollow piston 15 forms a sealing under the extrusion of the outer wall of the pressure storage tube body 34 .

A lower chamber 15a is formed between the hollow piston 15 and the base 5b, and a fire extinguishing medium M is contained in the lower chamber. An upper chamber 15b is formed between the hollow piston 15 and the top cover 2b, and the upper chamber communicates with the air guide hole 26. Since the hollow piston 15 is sealed with the body 1b and the pressure accumulator tube body 34 by the piston sealing ring 17, the fire extinguishing medium M will not enter the space between the hollow piston 15 and the top cover 2b.

The trigger 4b has the same trigger seat 41 and safety device 43 as the trigger 4a in the first embodiment. The difference is that, in this embodiment, one end of the push rod 421 of the trigger control member 42 is no longer provided with a thimble 423 , but a push rod 425 is provided. The push rod 425 pushes back the valve core 354 to release the high-pressure gas in the pressure accumulator tube body 34, and at the same time, the lower part of the push rod is provided with a boss or a latch to prevent the push rod 421 from being pulled out.

The bottom of the body 1b is provided with an internal thread on the inner wall close to its end face, and the outer wall of the base 5b is provided with an external thread matched with the internal thread at the bottom of the body 1b, and the body 1b and the base 5b are connected by thread engagement. The inner wall of the bottom of the main body 1b is provided with a base sealing ring 18 which cooperates with the outer and outer walls of the base 5b for sealing. Two one-way valves 12 are arranged on the base 5b, and the one-way valve 12 communicates with the spout 13. The structure and function of the one-way valve 12 and the spout 13 are the same as those of the one-way valve 12 and the spout 13 in Embodiment 1, that is, The fire extinguishing medium M in the body 1b can be released and atomized from the nozzle 13 through the one-way valve 12 .

A pressure storage tube installation groove 51 is provided on the end surface of the base 5b close to the inside of the body, for fixing and installing the pressure storage tube 3b. The cap portion 361 of the bottom plug 36 is inserted into the pressure accumulator tube installation groove 51 , so as to fix the pressure accumulator tube 3b.

When using the fire extinguisher 200 of the embodiment, first, the user pulls out the safety device 43, and then presses the button 422, so that the push rod 421 and the push rod 425 move toward the direction close to the valve core 354, and the push rod 425 pushes the valve core 354 releases the high-pressure gas stored in the pressure accumulator tube body 34 , and enters the main body 1 b from the gas outlet 352 through the air guide hole 26 . With the inflow of high-pressure gas, the pressure in the space between the hollow piston 15 and the top cover 2b increases, pushing the hollow piston 15 to move towards the direction close to the base 5b, squeezing the fire extinguishing medium M so that the fire extinguishing medium M pushes away from the base 5b The one-way valve 12 on the top is sprayed out after being atomized by the nozzle to realize spray fire extinguishing.

Function and effect of embodiment

In the fire extinguisher of this embodiment, the pressure is stored through the pressure storage pipe, and the main body is also a tubular structure. The tubular parts can be produced by performing operations such as drilling and tapping with conventional processing equipment, which simplifies the production process.

In addition, the bottom of the main body is connected with the base through threads, and the top is connected with the top cover through threads, which is convenient for disassembly.

In addition, a ring plug is provided between the body and the pressure storage tube, and a piston sealing ring for sealing is provided on the ring plug, so that the fire extinguisher of this embodiment is suitable for liquid fire extinguishing medium. When spraying liquid fire extinguishing medium, Due to the sealing of the piston sealing ring, it can effectively prevent the steam of the fire extinguishing medium from penetrating into the upper cavity, and at the same time make the high-pressure gas evenly act on the liquid surface of the fire extinguishing medium. The fire extinguisher can spray at any angle, that is, it can spray 360 degrees, so that The extinguisher does not need to be held vertically and can spray media in all directions.

<Modification 1>

Fig. 4 is a schematic cross-sectional view of a fire extinguisher in Modification 1 of the present invention. In this modified example, the same reference numerals are assigned to the same structures as in the first embodiment, and the same descriptions are omitted.

As shown in Figure 4, this modification is a modification of Embodiment 1. The difference from Embodiment 1 is that the fire extinguisher 200' of this modification is no longer provided with a top cover, and the top and bottom of the main body 1a' are both One-piece construction. In addition, the difference between this modified example and the first embodiment is that both the pressure accumulator tube body 34 and the body 1a' are sealed by the same top plug 35, and this structure is similar to that of the second embodiment.

The top of the main body 1a' has an installation hole for installing the top plug 35, and the high-pressure gas is sprayed from the air guide hole and directly acts on the surface of the fire extinguishing medium. In addition, similar to the first embodiment, the bottom of the body 1a' is also provided with a one-way valve 12 and a spout 13.

In this embodiment, since the top and bottom of the main body 1a' are integrally formed, large-scale manufacturing can be realized through molds, and at the same time, there are as few connecting parts and contact surfaces as possible, so the airtightness is better and leakage is not easy to occur.

<Modification 2>

Fig. 5 is a schematic cross-sectional view of a fire extinguisher with a pressure gauge in Modification 2 of the present invention. In the second modification, the same structures as those in the second embodiment are given the same reference numerals and the same descriptions are omitted.

As shown in Figure 5, this modification is a modification of Embodiment 2, providing a fire extinguisher 300, including a body 1c, a top cover 2c, a pressure storage tube 3c, a trigger 4c and a base 5c, wherein the body 1c, the top cover 2c and the trigger 4c are the same as the structure of the body 1b, the top cover 2b and the trigger 4b in the second embodiment, and will not be repeated here.

The difference from the fire extinguisher 200 in the second embodiment is that the bottom of the pressure accumulator tube body 34 is no longer connected to the bottom plug, but is connected to a pressure gauge 37, which is used to realize pressure display and sealed high pressure function of the gas. At the same time, there is no hollow piston 15 between the body 1c and the pressure storage tube 3c.

FIG. 6 is a partially enlarged view of C in FIG. 5 .

As shown in FIG. 6 , an installation hole 52 is provided in the middle of the base 5c, and the installation hole 52 has two parts, namely a pressure accumulator tube installation part 521 and a pressure gauge installation part 522 .

The bottom of the pressure storage tube body 34 is inserted into the pressure storage tube mounting portion 521 , and the base 5 c is sealed by the pressure gauge gasket 374 .

The pressure gauge 37 has a pressure gauge body 371 and a pressure gauge connecting portion 372 connected to the pressure gauge body. The pressure gauge connection part 372 is provided with an external thread that matches the internal thread on the bottom inner wall of the pressure storage pipe body 34, and the pressure gauge 37 is connected to the pressure storage pipe body 34 through thread engagement. A pressure gauge sealing ring 373 matching the outer wall of the pressure gauge connecting part 372 is provided on the inner wall near the pressure gauge connecting part 372 at the bottom of the body 34, and the pressure gauge connecting section 372 and the pressure storage pipe are formed by extruding the pressure gauge sealing ring 373. seal between bodies 34.

The pressure gauge 37 is inserted into the pressure gauge installation part 522, and the end surface of the pressure gauge connection part 372 close to the pressure gauge body 371 is provided with a pressure gauge gasket 374, which is connected to the pressure gauge installation part 522 and the pressure storage tube installation part 521 The end faces are connected to form a seal by extruding the pressure gauge gasket 374 to prevent the fire extinguishing medium from leaking from the bottom. The end face of the base 5c is in close contact with the gasket 374 of the pressure gauge.

In this embodiment, by setting the pressure gauge 37, the user can observe the pressure value of the gas stored in the pressure storage tube from the outside, thereby judging that the fire extinguishing medium in the fire extinguisher can be pushed out by the minimum pressure that can be released, and take corresponding gas replenishment measures.

<Modification 3>

Fig. 7 is a schematic cross-sectional view of a fire extinguisher in Modification 3 of the present invention. This modification is yet another modification of the second embodiment. For the same structures as the second embodiment, the same numbers are given and the same descriptions are omitted.

As shown in Figure 7, a hollow piston 15' is provided in the body 1c of the fire extinguisher 300' and is sealed by a piston sealing ring.

A top cover 2c' is provided on the top of the main body 1c. The top of the top cover 2c' is fixedly connected to the top of the main body 1c through an external thread, buckle or latch structure, and a top cover sealing ring 11 for sealing is provided between the top cover 2c' and the main body 1c; the top cover 2c' The bottom is fixedly connected with the top of the pressure storage tube 3c' through external threads.

In this embodiment, the central part of the top cover 2c' has a top cover protrusion 211 extending downwards, and the top cover protrusion 211 is sealingly connected with the pressure storage pipe body 34 through the sealing ring 11b. The top cover protrusion 211 is provided with a vertical axial through hole, the valve core 354 is installed in the axial through hole, and the top cover protrusion 211 is also provided with an air guide hole 353 . Wherein, the functions of the valve core 354 and the air guide hole 353 are the same as those in the second embodiment, and will not be repeated here. Thus, the top cover protrusion 211 of this modified example realizes the same function as the top plug 35 of the second embodiment, the difference is that the top plug 35 of the second embodiment and the top cover 2b are in a separate structure, while the top plug 35 of the second embodiment has a separate structure, while The top cover protrusion 211 is actually a part of the top cover 2c', and is integrally formed with the top cover 2c'.

Similar to Modification 2, this modification is also equipped with a pressure gauge 37, but the structure of the base 5c' of this modification and the installation method of the pressure gauge 37 are different from Modification 2: the pressure gauge 37 of this modification is installed in the base, and the base 5c' is in sealing connection with the bottom of the pressure storage tube.

Specifically, the base 5c' protrudes from the center of the end face of the inner cavity of the main body 1c, and a pressure storage tube installation part 521' protrudes from the center, and the pressure storage tube installation part 521' is connected to the body 34 of the pressure storage tube by screwing. The bottom end; the base 5c' is also provided with a pressure gauge installation part 522' that passes through the base 5c' and communicates with the inner cavity of the pressure accumulator tube body 34, and the pressure gauge 37 is fixedly installed in the pressure gauge installation part 522'.

Compared with Modification 2, in this modification, there is no need for an additional gasket between the part where the pressure gauge is installed and the pressure accumulator tube body 30a, and only the pressure gauge installation part 522' needs to be taped and threaded to achieve sealing. In addition, the taper thread connection can also be replaced by a conventional pipe thread and an O-ring to achieve sealing.

The above-mentioned embodiments are only used to illustrate the specific implementation manners of the present invention, and the present invention is not limited to the description scope of the above-mentioned embodiments.

In the above-mentioned embodiments, all the parts connected by threads can be sealed by setting sealing rings, and can also be sealed for a short time by adding sealant or filler, and can also be directly connected by interference fit instead of threaded connections; not only that, When the body and the top and bottom are partially made of metal thin-walled parts, the sealing effect can also be achieved through the seam sealing process.

In the above-mentioned embodiment, the top cover and the base can also be cap-shaped structures, the top cover and the base are provided with internal threads, and the outer wall of the body is provided with matching external threads, and the connection is carried out through thread engagement. At this time, the corresponding The sealing ring can be arranged on the outer wall of the body, or on the inner wall of the top cover and the base.

In the above embodiment, if the sealing film is selected, the fire extinguisher is a disposable fire extinguisher, and a nozzle is used to compress the sealing film, on which a threaded cock or a wedge-shaped plug needs to be added, and there are holes in the plug to allow the fire extinguishing medium to circulate. It is of course also possible to integrate the sealing membrane into the threaded plug or wedge plug, or to form a locally thin joint without the need for an additional plug compression.

In the above-mentioned embodiments, the spout is composed of holes and flow channels, which is beneficial to the atomization and spraying of the fire extinguishing medium; in the present invention, the spout can also be made into a separate modular component, made of metal or non-metallic materials, which is convenient for processing And set different technical performance.

Claims (14)

1. A fire extinguisher, characterized in that it comprises:

   a body for containing the extinguishing medium;

   The pressure storage tube is arranged in the body and has a release piece for storing high-pressure gas;

   a sealed spray mechanism for spraying said extinguishing medium; and

   a trigger, configured to trigger the release member to release the high-pressure gas, thereby pushing the fire extinguishing medium to be ejected from the sealed injection mechanism,

   Wherein, the body has a top opening and a bottom opening,

   the sealing injection mechanism is arranged at the bottom of the body and seals the bottom opening,

   The trigger is disposed on the top of the body and seals the top opening.
2. The fire extinguisher according to claim 1, characterized in that:

   Wherein, the pressure storage tube includes a pressure storage tube body,

   The pressure storage tube body has an inner cavity for storing the high-pressure gas,

   The pressure storage tube body is a pressure tube or a hollow rod.
3. The fire extinguisher according to claim 1, characterized in that:

   Wherein, the sealing injection mechanism has a spout formed by processing the bottom of the body and a one-way valve that is sealed at the bottom of the body and communicates with the spout,

   The nozzle is used to spray the fire extinguishing medium.
4. The fire extinguisher according to claim 1, characterized in that:

   Wherein, the sealing injection mechanism has a spout formed by processing at the bottom of the body and a sealing film sealingly arranged at the bottom of the body,

   The nozzle is used to spray the fire extinguishing medium.
5. The fire extinguisher according to claim 1, characterized in that:

   Wherein, the sealing injection mechanism is a membrane nozzle, and the membrane nozzle is a nozzle with a sealing membrane.
6. The fire extinguisher according to claim 1, characterized in that:

   Wherein, the sealing injection mechanism is a one-way spray head with a spout, and the one-way spray head is a spray head with a one-way valve, and the one-way valve communicates with the spout,

   The one-way spray head seals the bottom opening.
7. The fire extinguisher according to claim 1, characterized in that:

   Wherein, the sealing injection mechanism includes a connected spray head and a one-way valve,

   the one-way valve seals the bottom opening,

   The spray head communicates with the outside and is used for spraying the fire extinguishing medium.
8. The fire extinguisher according to claim 1, characterized in that:

   Wherein, the pressure storage tube has an air outlet,

   The release member is a sealing diaphragm arranged at the air outlet,

   The trigger has a thimble, and the thimble pierces the sealing diaphragm to release the high-pressure gas from the gas outlet when in use.
9. The fire extinguisher according to claim 1, characterized in that:

   Wherein, the pressure storage tube has an air outlet,

   The release member is a valve core arranged at the gas outlet for charging and releasing gas,

   The trigger has a push rod, and the push rod is used to push open the valve core to release the high-pressure gas from the gas outlet when in use.
10. The fire extinguisher according to claim 1, characterized in that:

    Wherein, the bottom of the pressure storage tube is provided with a pressure gauge, and the pressure gauge passes through the bottom of the body and is sealed and connected with the pressure storage tube and the bottom of the body,

    The pressure gauge is used to display the pressure value in the pressure storage tube to the user.
11. The fire extinguisher according to claim 1, characterized in that:

    Wherein, the fire extinguishing medium is a water-based fire extinguishing agent or a liquid chemical fire extinguishing agent.
12. The fire extinguisher according to claim 1, characterized in that:

    Wherein, the material of the body is a non-metallic material that can withstand the pressure when it is released, including any one or a combination of glass, plastic, resin or composite materials that can withstand the pressure.
13. The fire extinguisher according to claim 1, characterized in that:

    Wherein, a piston is arranged in the body, and the interior of the body is divided into an upper chamber and a lower chamber, which are used to allow the high-pressure gas released from the pressure storage tube to act on the fire extinguishing medium evenly, so that the When the fire extinguisher is at any angle, the fire extinguishing medium can be sprayed out through the sealed injection mechanism.
14. The fire extinguisher according to claim 1, characterized in that:

    Wherein, the body is integrally formed,

    The material of the body is a metal material, including any one of steel and aluminum alloy or a combination of both.

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