CN213100541U

CN213100541U - Fire arrester

Info

Publication number: CN213100541U
Application number: CN202021112458.3U
Authority: CN
Inventors: 史建伟; 孟昭懿; 沈健
Original assignee: Csic Dalian New Materials Co ltd; Changzhou Telma Technology Co ltd
Current assignee: Csic Dalian New Materials Co ltd; Changzhou Telma Technology Co ltd
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2021-05-04
Anticipated expiration: 2030-06-16

Abstract

The utility model discloses a fire arrestor, which comprises a connector, a main body, a switching outer sleeve, a first valve core, a second valve core and a cylindrical spring; the tail end of the connector is hermetically fixed inside the head end of the main body; the tail end of the main body is hermetically fixed inside the head end of the switching outer sleeve; a fire stopping pipe is arranged inside the tail end of the main body; the first valve core is arranged in the main body and is positioned between the connector and the fire stopping pipe; a first annular boss is arranged in an inner hole of the switching outer sleeve, and the second valve core is arranged between the fire stopping pipe and the first annular boss; and two ends of the cylindrical spring are respectively abutted against the first valve core and the second valve core. The utility model discloses set up two spools, when flame backward flow, tail end that the first spool sealed the connector, the tail end that the second spool sealed the flame arresting pipe prevent flame to the direction burning of admitting air, have splendid back fire relief effect, can thoroughly prevent the tempering, avoid the emergence of incident.

Description

Fire arrester

Technical Field

The utility model relates to a fire arrester.

Background

When the work of combustion equipment such as a flame gun is finished and the gas source is closed, gas is easy to form backflow, flame possibly enters the gas source to cause explosion, and safety accidents are caused, so that a flame arrester is required to be installed between the combustion equipment such as the flame gun and the gas source to prevent the flame from flowing back. The traditional flame arrester, for example, the flame arrester used in "a kind of oxyhydrogen flame gun device" disclosed in chinese patent document CN201620424358.1, includes a flame arrester housing, a flame arrester cover is arranged in the flame arrester housing, the flame arrester cover is a tubular structure, the flame arrester cover is formed by sintering metal powder, one end of the flame arrester cover is connected with an air valve, and the other end is connected with a gun nozzle. The method has the disadvantages that the flame backflow cannot be completely prevented, and certain potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a flame arrester that can thoroughly prevent the flame backward flow.

Realize the utility model discloses the technical scheme of purpose is: a flame arrester comprises a connector, a main body, a switching outer sleeve, a first valve core, a second valve core and a cylindrical spring; the tail end of the connector is hermetically fixed inside the head end of the main body; the tail end of the main body is hermetically fixed inside the head end of the switching outer sleeve; a fire stopping pipe is arranged inside the tail end of the main body; the first valve core is arranged in the main body and is positioned between the connector and the fire stopping pipe; a first annular boss is arranged in an inner hole of the switching outer sleeve, and the second valve core is arranged between the fire stopping pipe and the first annular boss; two ends of the cylindrical spring are respectively abutted against the first valve core and the second valve core; when the air pressure in the switching outer sleeve is greater than the air pressure in the connector, the first valve core seals the tail end of the connector, the second valve core seals the tail end of the fire stopping pipe, and an air inlet channel is blocked among the connector, the main body and the inner hole of the switching outer sleeve; when the air pressure in the connector is greater than the air pressure in the switching outer sleeve, the first valve core is far away from the tail end of the connector, the second valve core is far away from the tail end of the fire stopping pipe, and an air inlet channel is formed among the connector, the main body and the inner hole of the switching outer sleeve and is opened.

The tail end of the connector is provided with an external thread, and the head end of the main body is provided with an internal thread; the tail end of the connector is in threaded connection with the head end of the main body, and a first sealing ring is arranged between the tail end of the connector and the head end of the main body.

The tail end of the main body is provided with an external thread, and the head end of the switching outer sleeve is provided with an internal thread; the tail end of the main body is in threaded connection with the head end of the switching outer sleeve, and a second sealing ring is arranged between the tail end of the main body and the head end of the switching outer sleeve.

A first limiting step is arranged in the inner hole of the main body; a second limiting step is arranged at the bottom of the internal thread at the head end of the switching outer sleeve; the fire-stopping pipe is limited between the first limit step and the second limit step.

The fire-stopping tube is made of porous metal which can be made by sintering stainless steel powder.

Blind holes are formed in the head end and the tail end of the first valve core, and vent holes are formed in the side walls of the two blind holes; the middle part of the peripheral surface of the first valve core is provided with a sealing step, the outer diameter of the front end of the sealing step is smaller than the inner diameter of the tail end of the connector, and the outer diameter of the rear end of the sealing step is larger than the inner diameter of the tail end of the connector; a third sealing ring is sleeved on the front side of the sealing step; a second annular boss is arranged at the tail end of the first valve core; the outer diameter of the second annular boss is smaller than the inner diameter of the main body and larger than the inner diameter of the fire-stopping pipe.

Blind holes are formed in the head end and the tail end of the second valve core, and vent holes are formed in the side walls of the two blind holes; the outer diameter of the front end of the second valve core is smaller than the inner diameter of the fire stopping pipe; a third annular boss is arranged in the middle of the second valve core; the outer diameter of the third annular boss is larger than the inner diameter of the fire-stopping pipe.

A flame arrester also comprises an adapter and a locking nut; the head end of the adapter is hermetically fixed in the tail end of the adapter sleeve; the locking nut is sleeved at the tail end of the adapter; the adapter and the locking nut are respectively provided with a first limiting boss and a second limiting boss; the first limiting boss is matched with the second limiting boss to limit the locking nut to move to the tail end of the adapter.

The head end of the adapter is provided with an external thread, and the tail end of the adapter sleeve is provided with an internal thread; the head end of adapter and the tail end threaded connection of switching overcoat to be equipped with the fourth sealing washer between the head end of adapter and the tail end of switching overcoat.

Plane notches are symmetrically arranged on the outer peripheral surface of the middle part of the adapter.

By adopting the technical scheme, the utility model discloses following beneficial effect has: (1) the utility model discloses set up two spools, when flame backward flow, tail end that the first spool sealed the connector, the tail end that the second spool sealed the flame arresting pipe prevent flame to the direction burning of admitting air, have splendid back fire relief effect, can thoroughly prevent the tempering, avoid the emergence of incident.

(2) The fire-stopping tube of the utility model is made of porous metal, which can reduce the temperature, prevent the gas from reaching the burning point and further improve the fire-retardant effect.

(3) The utility model discloses an outer peripheral face middle part of first case is equipped with sealed step to the front end external diameter of sealed step is less than the tail end internal diameter of connector, and the front side cover of sealed step is equipped with the third sealing washer, and is sealed effectual.

(4) The utility model discloses a still include adapter and lock nut, it is convenient the utility model discloses a spark arrester is connected with combustion apparatus.

(5) The utility model discloses a symmetry is equipped with the plane breach on the outer peripheral face at the middle part of adapter and is convenient for rotate the adapter, and the tail end of switching overcoat is installed to the adapter to the convenience.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a sectional view a-a of fig. 1.

The reference numbers in the drawings are:

the anti-explosion valve comprises a connector 1, a main body 2, a fire-stopping pipe 2-1, a switching outer sleeve 3, a first annular boss 3-1, a first valve core 4, a second annular boss 4-1, a second valve core 5, a third annular boss 5-1, a cylindrical spring 6, a switching head 10, a first limiting boss 10-1, a plane notch 10-2, a locking nut 11, a second limiting boss 11-1 and a fourth sealing ring 12.

Detailed Description

(example 1)

Referring to fig. 1 and 2, the flame arrester of the embodiment includes a connector 1, a main body 2, an adapter sleeve 3, a first valve core 4, a second valve core 5, a cylindrical spring 6, an adapter 10, and a lock nut 11.

The tail end of the connector 1 is provided with external threads, and the head end of the main body 2 is provided with internal threads. The tail end of the connector 1 is in threaded connection with the head end of the main body 2, and a first sealing ring 7 is arranged between the tail end of the connector 1 and the head end of the main body 2.

The tail end of the main body 2 is provided with an external thread, and the head end of the switching outer sleeve 3 is provided with an internal thread. The tail end of the main body 2 is in threaded connection with the head end of the switching outer sleeve 3, and a second sealing ring 8 is arranged between the tail end of the main body 2 and the head end of the switching outer sleeve 3. A fire stopping pipe 2-1 is arranged inside the tail end of the main body 2. A first limiting step is arranged in an inner hole of the main body 2. The bottom of the internal thread of the head end of the switching outer sleeve 3 is provided with a second limit step. The fire-stopping tube 2-1 is limited between the first limit step and the second limit step. The fire stop tube 2-1 is a porous metal which may be made by sintering stainless steel powder.

The first valve core 4 is arranged inside the main body 2 and is positioned between the connector 1 and the fire stopping pipe 2-1. The head and the tail of the first valve core 4 are provided with blind holes, and the side walls of the two blind holes are provided with vent holes. The middle part of the peripheral surface of the first valve core 4 is provided with a sealing step, the outer diameter of the front end of the sealing step is smaller than the inner diameter of the tail end of the connector 1, and the outer diameter of the rear end of the sealing step is larger than the inner diameter of the tail end of the connector 1. And a third sealing ring 9 is sleeved on the front side of the sealing step. The tail end of the first valve core 4 is provided with a second annular boss 4-1. The outer diameter of the second annular boss 4-1 is smaller than the inner diameter of the body 2 and larger than the inner diameter of the flame arrester tube 2-1.

A first annular boss 3-1 is arranged in an inner hole of the switching outer sleeve 3, and a second valve core 5 is arranged between the fire stopping pipe 2-1 and the first annular boss 3-1. The head and the tail of the second valve core 5 are both provided with blind holes, and the side walls of the two blind holes are both provided with vent holes. The outer diameter of the front end of the second valve core 5 is smaller than the inner diameter of the fire stopping pipe 2-1. The middle part of the second valve core 5 is provided with a third annular boss 5-1. The outer diameter of the third annular boss 5-1 is larger than the inner diameter of the fire-stopping pipe 2-1.

Two ends of the cylindrical spring 6 are respectively abutted against the first valve core 4 and the second valve core 5.

The head end of the adapter 10 is provided with external threads, and the tail end of the adapter sleeve 3 is provided with internal threads. The head end of the adapter 10 is in threaded connection with the tail end of the adapter sleeve 3, and a fourth sealing ring 12 is arranged between the head end of the adapter 10 and the tail end of the adapter sleeve 3. The plane gaps 10-2 are symmetrically arranged on the outer peripheral surface of the middle part of the adapter 10, so that the adapter 10 can be conveniently rotated, and the adapter 10 can be conveniently installed at the tail end of the adapter sleeve 3. The locking nut 11 is sleeved at the tail end of the adapter 10. The adapter 10 and the locking nut 11 are respectively provided with a first limiting boss 10-1 and a second limiting boss 11-1. The first limiting boss 10-1 is matched with the second limiting boss 11-1 to limit the locking nut 11 to move towards the tail end of the adapter 10.

The operating principle of the first valve core 4 and the second valve core 5 of the flame arrester of the embodiment is as follows: when the air pressure in the switching outer sleeve 3 is greater than the air pressure in the connector 1, the first valve core 4 seals the tail end of the connector 1, the second valve core 5 seals the tail end of the fire stopping pipe 2-1, and an air inlet channel is blocked by the inner holes of the connector 1, the main body 2 and the switching outer sleeve 3. When the air pressure in the connector 1 is greater than the air pressure in the switching outer sleeve 3, the first valve core 4 is far away from the tail end of the connector 1, the second valve core 5 is far away from the tail end of the fire stopping pipe 2-1, and an air inlet channel is formed among the inner holes of the connector 1, the main body 2 and the switching outer sleeve 3 and is opened.

The working mode of the flame arrester of this embodiment is: when gas enters, the gas pushes the first valve core 4 to move towards the tail end of the flame arrester, the second valve core 5 is abutted against the first annular boss 3-1 of the adapter sleeve 3 under the action of the cylindrical spring 6, and the gas enters from the connector 1 and is finally ejected from the tail end of the adapter 10.

The fire retardant principle of the flame arrester of this embodiment is: after backflow is formed, the pressure at the tail end of the second valve core 5 is larger than the pressure at the head end, the second valve core 5 and the first valve core 4 are pushed to move towards the head end of the flame arrester, gas supply is blocked, meanwhile, flame can burn towards the head end of the flame arrester only through the fire stopping pipe 2-1, and the temperature can be reduced due to the fact that the fire stopping pipe is made of porous metal, so that gas cannot reach a burning point, and the flame arresting effect is achieved.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A flame arrestor, comprising: the valve comprises a connector (1), a main body (2), a switching outer sleeve (3), a first valve core (4), a second valve core (5) and a cylindrical spring (6); the tail end of the connector (1) is hermetically fixed inside the head end of the main body (2); the tail end of the main body (2) is hermetically fixed inside the head end of the switching outer sleeve (3); a fire stopping pipe (2-1) is arranged inside the tail end of the main body (2); the first valve core (4) is arranged in the main body (2) and is positioned between the connector (1) and the fire stopping pipe (2-1); a first annular boss (3-1) is arranged in an inner hole of the switching outer sleeve (3), and a second valve core (5) is arranged between the fire stopping pipe (2-1) and the first annular boss (3-1); two ends of the cylindrical spring (6) are respectively abutted against the first valve core (4) and the second valve core (5); when the air pressure in the switching outer sleeve (3) is greater than the air pressure in the connector (1), the first valve core (4) seals the tail end of the connector (1), the second valve core (5) seals the tail end of the fire stopping pipe (2-1), and an air inlet channel is blocked among inner holes of the connector (1), the main body (2) and the switching outer sleeve (3); when the air pressure in the connector (1) is greater than the air pressure in the switching outer sleeve (3), the tail end of the first valve core (4) far away from the connection stopping head (1) and the tail end of the second valve core (5) far away from the fire stopping pipe (2-1) form an air inlet channel among inner holes of the connector (1), the main body (2) and the switching outer sleeve (3) to be opened.

2. A flame arrestor as defined in claim 1, wherein: the tail end of the connector (1) is provided with an external thread, and the head end of the main body (2) is provided with an internal thread; the tail end of connector (1) and the head end threaded connection of main part (2) are equipped with first sealing washer (7) between the tail end of connector (1) and the head end of main part (2).

3. A flame arrestor as defined in claim 1, wherein: the tail end of the main body (2) is provided with an external thread, and the head end of the switching outer sleeve (3) is provided with an internal thread; the tail end of the main body (2) is in threaded connection with the head end of the switching outer sleeve (3), and a second sealing ring (8) is arranged between the tail end of the main body (2) and the head end of the switching outer sleeve (3).

4. A flame arrestor as defined in claim 3, wherein: a first limiting step is arranged in an inner hole of the main body (2); a second limiting step is arranged at the bottom of the internal thread at the head end of the switching outer sleeve (3); the fire-stopping tube (2-1) is limited between the first limit step and the second limit step.

5. A flame arrestor as defined in claim 1, wherein: the fire-stopping pipe (2-1) is made of porous metal.

6. A flame arrestor as defined in claim 1, wherein: blind holes are formed in the head end and the tail end of the first valve core (4), and vent holes are formed in the side walls of the two blind holes; a sealing step is arranged in the middle of the outer peripheral surface of the first valve core (4), the outer diameter of the front end of the sealing step is smaller than the inner diameter of the tail end of the connector (1), and the outer diameter of the rear end of the sealing step is larger than the inner diameter of the tail end of the connector (1); a third sealing ring (9) is sleeved on the front side of the sealing step; a second annular boss (4-1) is arranged at the tail end of the first valve core (4); the outer diameter of the second annular boss (4-1) is smaller than the inner diameter of the main body (2) and larger than the inner diameter of the fire stopping pipe (2-1).

7. A flame arrestor as defined in claim 1, wherein: blind holes are formed in the head end and the tail end of the second valve core (5), and vent holes are formed in the side walls of the two blind holes; the outer diameter of the front end of the second valve core (5) is smaller than the inner diameter of the fire stopping pipe (2-1); a third annular boss (5-1) is arranged in the middle of the second valve core (5); the outer diameter of the third annular boss (5-1) is larger than the inner diameter of the fire stopping pipe (2-1).

8. A flame arrestor as defined in claim 1, wherein: the connector also comprises an adapter (10) and a locking nut (11); the head end of the adapter (10) is hermetically fixed in the tail end of the adapter sleeve (3); the locking nut (11) is sleeved at the tail end of the adapter (10); a first limiting boss (10-1) and a second limiting boss (11-1) are respectively arranged on the adapter (10) and the locking nut (11); the first limiting boss (10-1) is matched with the second limiting boss (11-1) to limit the locking nut (11) to move towards the tail end of the adapter (10).

9. A flame arrestor as defined in claim 8, wherein: the head end of the adapter (10) is provided with an external thread, and the tail end of the adapter sleeve (3) is provided with an internal thread; the head end of adapter (10) and the tail end threaded connection of switching overcoat (3) to be equipped with fourth sealing washer (12) between the head end of adapter (10) and the tail end of switching overcoat (3).

10. A flame arrestor as defined in claim 9, wherein: plane notches (10-2) are symmetrically arranged on the outer peripheral surface of the middle part of the adapter (10).