CN114849110A

CN114849110A - Split handheld fire extinguisher

Info

Publication number: CN114849110A
Application number: CN202210636621.3A
Authority: CN
Inventors: 王沛钢; 刘海疆; 李国强; 周劼波; 王锦怡
Original assignee: Yuyan Tianbo Fire Fighting Equipment Co ltd
Current assignee: Yuyan Tianbo Fire Fighting Equipment Co ltd
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2022-08-05
Anticipated expiration: 2042-06-07
Also published as: CN114849110B

Abstract

The invention provides a split handheld fire extinguisher, comprising: go up the fire extinguisher bottle, go up fire extinguisher bottle bottom embedding and install check valve group, go up the fire extinguisher bottle top and install the valve, install the carrying handle and press the handle on the valve, the valve left part is connected with the spray tube. Through making fire extinguisher bottle and lower fire extinguisher bottle split type design, can spray when using the fire extinguisher in needs, make the fire extinguisher bottle change over to the intracavity portion that holds of lower fire extinguisher bottle, be connected with lower check valve group through last check valve group like this, and make last check valve group, lower check valve group is opened simultaneously, go up fire extinguisher bottle and lower fire extinguisher bottle intercommunication like this, and after demolising last fire extinguisher bottle, go up check valve group, lower check valve group seals simultaneously, lose into the back in the fire with lower fire extinguisher bottle like this, can make all spouts open, lower fire extinguishing agent in the lower fire extinguisher bottle spouts from the spout like this, can be when guaranteeing to have sufficient fire extinguishing agent like this, still do not hinder last fire extinguisher bottle and the components of a whole that can function independently of lower fire extinguisher bottle.

Description

Split handheld fire extinguisher

Technical Field

The invention relates to the technical field of fire extinguishers, in particular to a split handheld fire extinguisher.

Background

The fire extinguisher is a portable fire extinguishing tool, chemical articles are placed in the fire extinguisher for rescuing and extinguishing fire, the fire extinguisher is one of common fire-proof facilities, the fire extinguisher is stored in public places or places where fire possibly occurs, the components filled in different types of fire extinguishers are different and are specially designed for different fire disasters, the fire extinguisher is used by paying attention so as not to generate adverse effects and cause dangers, the fire extinguisher is divided into a handheld type fire extinguisher and a cart type fire extinguisher, and the handheld type fire extinguisher has wide application.

Present hand-held type fire extinguisher, the function is comparatively single, can only put out a fire through spraying, can't directly throw the fire extinguisher into fire, if directly throw the fire extinguisher into fire, can arouse the explosion to lead to can't selecting application method according to the use occasion.

Disclosure of Invention

The present invention is directed to overcome the drawbacks of the prior art and to provide a separate hand-held fire extinguisher to solve the problems of the prior art.

A split handheld fire extinguisher comprising:

the fire extinguisher comprises an upper fire extinguisher bottle, an upper check valve group is embedded and mounted at the bottom of the upper fire extinguisher bottle, a valve is mounted at the top of the upper fire extinguisher bottle, a carrying handle and a pressing handle are mounted on the valve, the left part of the valve is connected with a spray pipe, the tail end of the spray pipe is connected with a nozzle, and the lower end of the valve is connected with a liquid guide pipe penetrating into the upper fire extinguisher bottle;

lower fire extinguisher bottle, the inside upside of fire extinguisher bottle is equipped with down and holds the chamber, go up the intracavity portion that holds of fire extinguisher bottle installation fire extinguisher bottle down, hold intracavity bottom embedding and install down the check valve group, it is connected with lower check valve group to go up the check valve group, fire extinguisher bottle outer wall downside evenly is equipped with a plurality of spouts down, a plurality of and the seal assembly of spout one-to-one are installed to the inside downside inner wall of fire extinguisher bottle down.

Specifically, go up the inside downside of fire extinguisher bottle and be equipped with fire extinguishing agent, go up the inside fire extinguisher bottle and be located the fire extinguishing agent top and arranged compressed nitrogen gas, the inside downside of fire extinguisher bottle is equipped with compressed nitrogen gas down, the inside downside of fire extinguisher bottle just is located compressed nitrogen gas top down and has arranged down fire extinguishing agent.

Specifically, go up fire extinguisher bottle outer wall downside and be equipped with the external screw thread, fire extinguisher bottle holds intracavity wall downside down and is equipped with the internal thread, external screw thread and internal thread looks adaptation.

The upper check valve group comprises a first connecting valve body, a first baffle, a first valve core, a first spring, a first ejector rod and a first sealing ring, the first connecting valve body is fixedly embedded into an upper fire extinguisher bottle, a first inner cavity is formed inside the first connecting valve body, the first inner cavity is communicated with the inside of the upper fire extinguisher bottle, the first baffle is fixed on the upper side inside the first inner cavity, at least three first air holes are uniformly formed in the first baffle in an annular mode, the first valve core is located below the first baffle and is slidably connected inside the first inner cavity, the first spring is connected between the upper end of the first valve core and the lower end of the first baffle, and first through holes are formed in two sides of the surface of the first valve core.

Specifically, the first ejector rods are provided with a pair, the first ejector rods are fixed on two sides of the middle of the lower end of the first baffle plate, and the tail ends of the first ejector rods penetrate through the first valve core and are in sliding connection with the first valve core.

Specifically, the sealing rings are in a pair, the sealing rings are movably sleeved outside the ejector rod, the sealing rings are fixedly embedded in the valve core, and the adhesive coating layer is arranged outside the ejector rod.

The lower one-way valve group comprises a second connecting valve body, a second baffle plate, a second valve core, a second spring, a second ejector rod and a second sealing ring, the second connecting valve body is fixedly embedded into a lower fire extinguisher bottle, the upper part of the second connecting valve body is connected with the lower part of the second connecting valve body in an inserting mode, a second inner cavity is arranged inside the second connecting valve body and communicated with the inside of the lower fire extinguisher bottle, the second baffle plate is fixed on the lower side of the inside of the second inner cavity, at least three second air holes are uniformly formed in the second baffle plate in an annular mode, the second valve core is located above the second baffle plate and connected to the inside of the second inner cavity in a sliding mode, the second spring is connected between the lower end of the second valve core and the upper end of the second baffle plate, and two through holes are formed in two sides of the surface of the second valve core.

Specifically, the second ejector rod is fixed in the middle of the upper end of the second baffle plate, the tail end of the second ejector rod penetrates through the second valve core and is in sliding connection with the second valve core, the tail end of the second ejector rod is in contact with the lower end of the first valve core, the tail end of the first ejector rod is in contact with the upper end of the second valve core, and the first ejector rod is located on two sides of the second ejector rod.

Specifically, the second sealing ring is sleeved outside the second ejector rod in a sliding mode, the second sealing ring is fixedly embedded into the second valve core, and an encapsulating layer is arranged outside the second ejector rod.

Specifically, the sealing assembly comprises a copper sheet, an iron sheet, a wax ring and a screw, the iron sheet is fixed at one end, close to the inside, of the copper sheet, the iron sheet and the copper sheet form a double-metal sheet, the iron sheet and the copper sheet are fixed with the lower fire extinguisher bottle through the screw, the copper sheet covers the nozzle, and the wax ring is sleeved outside the iron sheet and the copper sheet and fixed with the lower fire extinguisher bottle.

Has the advantages that: by the split design of the upper fire extinguisher bottle and the lower fire extinguisher bottle, when a fire extinguisher needs to be sprayed and used, the upper fire extinguisher bottle is rotated into the accommodating cavity of the lower fire extinguisher bottle, the upper check valve group and the lower check valve group are connected, the upper check valve group and the lower check valve group are opened simultaneously, the upper fire extinguisher bottle is communicated with the lower fire extinguisher bottle, after the upper fire extinguisher bottle is disassembled, the upper check valve group and the lower check valve group are closed simultaneously, all nozzles can be opened after the lower fire extinguisher bottle is thrown into a fire, the lower fire extinguishing agent in the lower fire extinguisher bottle is sprayed out from the nozzles, so that the upper fire extinguisher bottle and the lower fire extinguisher bottle are not obstructed to be split while enough fire extinguishing agent is ensured, the upper fire extinguisher bottle and the lower fire extinguisher bottle can be selectively sprayed and used according to users and can be directly thrown into the fire, and the lower fire extinguisher bottle cannot explode when being thrown into the fire, the practicality is improved, and simultaneously, the security has still improved.

Drawings

FIG. 1 is an overall schematic view of the present invention;

FIG. 2 is a schematic overall cross-sectional view of the present invention;

FIG. 3 is a partial schematic view of portion A of FIG. 2 according to the present invention;

FIG. 4 is a partial view of the section B in FIG. 2 according to the present invention.

In the figure: 1-upper fire extinguisher bottle, 2-lower fire extinguisher bottle, 3-nozzle, 4-carrying handle, 5-valve, 6-pressing handle, 7-spray pipe, 8-nozzle, 9-liquid guide pipe, 10-upper fire extinguishing agent, 11-lower fire extinguishing agent, 12-upper check valve group, 121-connecting valve body I, 122-baffle I, 123-air hole I, 124-valve core I, 125-spring I, 126-through hole I, 127-ejector rod I, 128-cavity I, 129-sealing ring I, 13-lower check valve group, 131-connecting valve body II, 132-baffle II, 133-air hole II, 134-valve core II, 135-spring II, 136-through hole II, 137-ejector rod II, 138-cavity II, 139-sealing ring II, 14-sealing component, 141-copper sheet, 142-iron sheet, 143-wax ring and 144-screw.

Detailed Description

As shown in fig. 1 to 4, a divided hand-held fire extinguisher includes:

the fire extinguisher comprises an upper fire extinguisher bottle 1, wherein an upper check valve group 12 is embedded and installed at the bottom of the upper fire extinguisher bottle 1, a valve 5 is installed at the top of the upper fire extinguisher bottle 1, a lifting handle 4 and a pressing handle 6 are installed on the valve 5, the left part of the valve 5 is connected with a spray pipe 7, the tail end of the spray pipe 7 is connected with a nozzle 8, and the lower end of the valve 5 is connected with a liquid guide pipe 9 penetrating into the upper fire extinguisher bottle 1;

a lower fire extinguisher bottle 2, a containing cavity is arranged on the upper side inside the lower fire extinguisher bottle 2, the upper fire extinguisher bottle 1 is installed inside the containing cavity of the lower fire extinguisher bottle 2, a lower check valve group 13 is embedded and installed at the bottom inside the containing cavity, the upper check valve group 12 is connected with the lower check valve group 13, a plurality of nozzles 3 are uniformly arranged on the lower side of the outer wall of the lower fire extinguisher bottle 2, a plurality of sealing components 14 which correspond to the nozzles 3 one by one are installed on the inner wall of the lower side inside the lower fire extinguisher bottle 2, an upper fire extinguishing agent 10 is arranged on the lower side inside the upper fire extinguisher bottle 1, compressed nitrogen is arranged inside the upper fire extinguisher bottle 1 and above the upper fire extinguishing agent 10, compressed nitrogen is arranged on the lower side inside the lower fire extinguisher bottle 2, a lower fire extinguishing agent 11 is arranged on the lower side inside the lower fire extinguisher bottle 2 and above the compressed nitrogen, and an external thread is arranged on the lower side of the outer wall of the upper fire extinguisher bottle 1, the lower side of the inner wall of the containing cavity of the lower fire extinguisher bottle 2 is provided with internal threads, the external threads are matched with the internal threads, and the carrying handle 4 is held to press the pressing handle 6, so that the upper fire extinguishing agent 10 in the upper fire extinguisher bottle 1 can be sprayed out from the nozzle 8 along the liquid guide pipe 9, the valve 5 and the spray pipe 7.

The upper check valve group 12 comprises a connecting valve body I121, a baffle I122, a valve core I124, a spring I125, a push rod I127 and a sealing ring I129, the connecting valve body I121 is fixedly embedded with the upper fire extinguisher bottle 1, an inner cavity I128 is arranged inside the connecting valve body I121, the inner cavity I128 is communicated with the inside of the upper fire extinguisher bottle 1, the baffle I122 is fixed at the upper side inside the inner cavity I128, at least three air holes I123 are uniformly formed in the annular shape on the baffle I122, the valve core I124 is positioned below the baffle I122 and is slidably connected inside the inner cavity I128, the spring I125 is connected between the upper end of the valve core I124 and the lower end of the baffle I122, through holes I126 are formed in two sides of the surface of the valve core I124, the push rod I127 is provided with a pair, the push rod I127 is fixed on two sides of the middle of the lower end of the baffle I122, and the tail end of the push rod I127 penetrates through the valve core 124 and is slidably connected with the valve core I124, the first sealing rings 129 are paired, the first sealing rings 129 are movably sleeved outside the first ejector rod 127, the first sealing rings 129 and the first valve core 124 are fixedly embedded, an encapsulating layer is arranged outside the first ejector rod 127, the lower one-way valve group 13 comprises a second connecting valve body 131, a second baffle plate 132, a second valve core 134, a second spring 135, a second ejector rod 137 and a second sealing ring 139, the second connecting valve body 131 is fixedly embedded with the lower fire extinguisher bottle 2, the upper part of the second connecting valve body 131 is inserted into the lower part of the first connecting valve body 121, a second inner cavity 138 is arranged inside the second connecting valve body 131, the second inner cavity 138 is communicated with the inside of the lower fire extinguisher bottle 2, the second baffle plate 132 is fixed to the lower side of the inside of the second inner cavity 138, at least three air holes 133 are uniformly formed in an annular shape on the second baffle plate 132, the second valve core 134 is positioned above the second baffle plate 132 and is slidably connected inside the second inner cavity 138, the second spring 135 is connected between the lower end of the second valve core 134 and the upper end of the second baffle plate 132, two sides of the surface of the second valve core 134 are provided with a second through hole 136, the second ejector rod 137 is fixed in the middle of the upper end of the second baffle 132, the tail end of the second ejector rod 137 penetrates through the second valve core 134 and is in sliding connection with the second valve core 134, the tail end of the second ejector rod 137 is in contact with the lower end of the first valve core 124, the tail end of the first ejector rod 127 is in contact with the upper end of the second valve core 134, the first ejector rod 127 is positioned on two sides of the second ejector rod 137, the second sealing ring 139 is sleeved outside the second ejector rod 137 in a sliding manner, the second sealing ring 139 and the second valve core 134 are embedded and fixed, the outer part of the second ejector rod 137 is provided with an encapsulating layer, when the upper fire extinguisher bottle 1 is assembled with the lower fire extinguisher bottle 2, the upper fire extinguisher bottle 1 is inserted into the containing cavity of the lower fire extinguisher bottle 2 and the upper fire extinguisher bottle 1 is rotated, so that the second connecting valve body 131 is inserted into the first connecting valve body 121 along with the bottom of the upper fire extinguisher bottle 1 in the containing cavity in a contacting manner, meanwhile, the second ejector rod 137 is inserted into the first inner cavity 128 to push the first valve core 124 upwards, the first ejector rod 127 is inserted into the second inner cavity 138 to push the second valve core 134 downwards, the first valve core 124 slides along the first ejector rod 127 when sliding, and the first sealing ring 129 is matched with an encapsulating layer on the surface of the first ejector rod 127 at the moment, so that the sealing performance of the first ejector rod 127 and the first valve core 124 can be improved, the second valve core 134 slides along the second ejector rod 137 when sliding, and the second sealing ring 139 is matched with the encapsulating layer on the surface of the second ejector rod 137, so that the sealing performance of the second ejector rod 137 and the second valve core 134 can be improved;

when the first valve core 124 slides upwards to extrude the first spring 125 and the second valve core 134 slides downwards to extrude the second spring 135, the inner part of the upper fire extinguisher bottle 1 is communicated with the lower part of the inner part of the lower fire extinguisher bottle 2 through the first air hole 123 and the first through hole 126 in the first inner cavity 128, and the second air hole 133 and the second through hole 136 in the second inner cavity 138, so that the lower fire extinguisher 11 in the lower fire extinguisher bottle 2 can be continuously used after the upper fire extinguishing agent 10 in the upper fire extinguisher bottle 1 is used up, and the split type design is adopted, and meanwhile, the component of the fire extinguishing agent cannot be reduced.

When the upper fire extinguisher bottle 1 is rotated to move the upper fire extinguisher bottle 1 out of the containing cavity of the lower fire extinguisher bottle 2, along with the separation of the connecting valve body II 131 and the connecting valve body I121, the second mandril 137 slides out of the first inner cavity 128, the first mandril 127 slides out of the second inner cavity 138, at the moment, the first spring 125 ejects the first valve core 124 to reset, the second spring 135 ejects the second valve core 134 to reset, the upper fire extinguishing agent 10 in the upper fire extinguisher bottle 1 can not be discharged from the first connecting valve body 121, the lower fire extinguishing agent 11 in the lower fire extinguisher bottle 2 can not be discharged from the second connecting valve body 131, thus the upper check valve group 12 and the lower check valve group 13 can be simultaneously closed, thereby connecting the upper check valve set 12 with the lower one-way valve set 13, opening the upper check valve set 12 and the lower one-way valve set 13 simultaneously, after the upper fire extinguisher bottle 2 is removed, the upper check valve group 12 and the lower check valve group 13 are simultaneously closed, and the fire extinguisher bottle can be opened and closed without the need of a user.

The sealing assembly 14 comprises a copper sheet 141, an iron sheet 142, a wax ring 143 and screws 144, the iron sheet 142 is fixed at one end of the copper sheet 141, the iron sheet 142 and the copper sheet 141 form a bimetallic strip, the iron sheet 142 and the copper sheet 141 are fixed with the lower fire extinguisher bottle 2 through the screws 144, the copper sheet 141 covers the spout 3, the wax ring 143 is sleeved outside the iron sheet 142 and the copper sheet 141 and is fixed with the lower fire extinguisher bottle 2, the lower fire extinguisher bottle 2 can be thrown into fire after the lower fire extinguisher bottle 2 is removed, after the wax ring 143 is heated, the wax ring 143 can be changed from a solid state into a liquid state because the wax ring 143 is made of paraffin, the bimetallic strip is heated, the copper sheet 141 and the iron sheet 142 are bent towards the side of the iron sheet 142 because the linear expansion coefficient of the copper is larger than that of the iron, and the copper sheet 141 and the iron sheet 142 play a role of blocking the spout 3 when the copper sheet 141, the iron sheet 141 and the iron sheet 142 play a role of blocking the spout 3 when the copper sheet 141, the fire extinguisher bottle 2 and the fire extinguisher bottle 2 are heated, After the iron sheet 142 is bent, the lower fire extinguishing agent 11 in the lower fire extinguisher bottle 2 can be sprayed out from the nozzle 3, the lower fire extinguishing agent 11 is sprayed out from the nozzle 3 around the lower fire extinguisher bottle 2, fire can be quickly extinguished, so that the sufficient fire extinguishing agent can be guaranteed, meanwhile, the upper fire extinguisher bottle 1 and the lower fire extinguisher bottle 2 are not hindered, the iron sheet can be selectively sprayed for use according to users, the iron sheet can be directly thrown into fire for use, the lower fire extinguisher bottle 2 cannot explode when being thrown into the fire, the practicability is improved, and the safety is also improved.

Claims

1. A split handheld fire extinguisher, comprising:

the fire extinguisher comprises an upper fire extinguisher bottle (1), wherein an upper check valve group (12) is embedded and installed at the bottom of the upper fire extinguisher bottle (1), a valve (5) is installed at the top of the upper fire extinguisher bottle (1), a lifting handle (4) and a pressing handle (6) are installed on the valve (5), a spray pipe (7) is connected to the left part of the valve (5), a nozzle (8) is connected to the tail end of the spray pipe (7), and a liquid guide pipe (9) penetrating into the upper fire extinguisher bottle (1) is connected to the lower end of the valve (5);

lower fire extinguisher bottle (2), the inside upside of fire extinguisher bottle (2) is equipped with and holds the chamber down, go up fire extinguisher bottle (1) and install the intracavity portion that holds of fire extinguisher bottle (2) down, it installs down check valve group (13) to hold the embedding of intracavity bottom, it is connected with lower check valve group (13) to go up check valve group (12), fire extinguisher bottle (2) outer wall downside evenly is equipped with a plurality of spouts (3) down, a plurality of seal assembly (14) with spout (3) one-to-one are installed to the inside downside inner wall of fire extinguisher bottle (2) down.

2. The split handheld fire extinguisher of claim 1, wherein: go up fire extinguisher bottle (1) inside downside and be equipped with fire extinguishing agent (10), go up fire extinguisher bottle (1) inside and be located fire extinguishing agent (10) top and arranged compressed nitrogen gas, the inside downside of fire extinguisher bottle (2) is equipped with compressed nitrogen gas down, fire extinguisher bottle (2) inside downside just is located compressed nitrogen gas top and has arranged down fire extinguishing agent (11) down.

3. The split handheld fire extinguisher of claim 1, wherein: go up fire extinguisher bottle (1) outer wall downside and be equipped with the external screw thread, the intracavity wall downside that holds of lower fire extinguisher bottle (2) is equipped with the internal thread, external screw thread and internal thread looks adaptation.

4. The split handheld fire extinguisher of claim 1, wherein: the upper check valve group (12) comprises a first connecting valve body (121), a first baffle plate (122), a first valve core (124), a first spring (125), a first ejector rod (127) and a first sealing ring (129), the first connecting valve body (121) is fixedly embedded with the upper fire extinguisher bottle (1), a first inner cavity (128) is arranged inside the first connecting valve body (121), the first inner cavity (128) is communicated with the inside of the upper fire extinguisher bottle (1), the first baffle plate (122) is fixed on the upper side of the inside of the first inner cavity (128), the baffle plate I (122) is uniformly provided with at least three air holes I (123) in an annular shape, the first valve core (124) is positioned below the first baffle plate (122) and is connected in a sliding way in the inner cavity (128), the first spring (125) is connected between the upper end of the first valve core (124) and the lower end of the first baffle plate (122), and through holes (126) are formed in two sides of the surface of the first valve core (124).

5. The split handheld fire extinguisher of claim 4, wherein: the first ejector rod (127) is provided with a pair, the first ejector rod (127) is fixed on two sides of the middle of the lower end of the first baffle plate (122), and the tail end of the first ejector rod (127) penetrates through the first valve core (124) and is in sliding connection with the first valve core (124).

6. The split hand fire extinguisher as claimed in claim 5, wherein: the first sealing ring (129) is provided with a pair, the first sealing ring (129) is movably sleeved outside the first ejector rod (127), the first sealing ring (129) and the first valve core (124) are fixedly embedded, and an encapsulating layer is arranged outside the first ejector rod (127).

7. The split handheld fire extinguisher of claim 6, wherein: the lower one-way valve group (13) comprises a second connecting valve body (131), a second baffle plate (132), a second valve core (134), a second spring (135), a second ejector rod (137) and a second sealing ring (139), the second connecting valve body (131) and the lower fire extinguisher bottle (2) are embedded and fixed, the upper part of the second connecting valve body (131) is inserted into the lower part of the first connecting valve body (121), the second connecting valve body (131) is internally provided with a second inner cavity (138), the second inner cavity (138) is communicated with the interior of the lower fire extinguisher bottle (2), the second baffle plate (132) is fixed on the lower side of the interior of the second inner cavity (138), the second baffle plate (132) is uniformly provided with at least three second air holes (133) in an annular shape, the second valve core (134) is positioned above the second baffle plate (132) and is slidably connected into the interior of the second baffle plate (138), the second spring (135) is connected between the lower end of the second valve core (134) and the upper end of the second baffle plate (132), and two sides of the surface of the second valve core (134) are provided with a second through hole (136).

8. The split hand fire extinguisher as claimed in claim 7, wherein: the second ejector rod (137) is fixed in the middle of the upper end of the second baffle plate (132), the tail end of the second ejector rod (137) penetrates through the second valve core (134) and is in sliding connection with the second valve core (134), the tail end of the second ejector rod (137) is in contact with the lower end of the first valve core (124), the tail end of the first ejector rod (127) is in contact with the upper end of the second valve core (134), and the first ejector rod (127) is located on two sides of the second ejector rod (137).

9. The split handheld fire extinguisher of claim 8, wherein: the second sealing ring (139) is sleeved outside the second ejector rod (137) in a sliding mode, the second sealing ring (139) and the second valve core (134) are embedded and fixed, and an encapsulating layer is arranged outside the second ejector rod (137).

10. The split handheld fire extinguisher of claim 1, wherein: the sealing assembly (14) comprises a copper sheet (141), an iron sheet (142), a wax ring (143) and screws (144), the iron sheet (142) is fixed at one end, close to the inside, of the copper sheet (141), the iron sheet (142) and the copper sheet (141) form a bimetallic strip, the iron sheet (142) and the copper sheet (141) are fixed with the lower fire extinguisher bottle (2) through the screws (144), the copper sheet (141) covers the nozzle (3), and the wax ring (143) is sleeved outside the iron sheet (142) and the copper sheet (141) and fixed with the lower fire extinguisher bottle (2).