CN211011376U

CN211011376U - Novel backfire arrester

Info

Publication number: CN211011376U
Application number: CN201921516183.7U
Authority: CN
Inventors: 朱国富; 沈大龙; 朱瑛; 周杏华; 刘玉娣
Original assignee: Changzhou Jinwo Welding And Cutting Equipment Co ltd
Current assignee: Changzhou Jinwo Welding And Cutting Equipment Co ltd
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2020-07-14
Anticipated expiration: 2029-09-12

Abstract

The utility model provides a novel backfire arrester, include: hinder the firetube, the protecgulum, the back lid, the flange pipe, the check valve, a spring, the back-fire relief piece, first rubber packing ring, the second rubber packing ring, the back-fire relief piece has a plurality of to install respectively in the back-fire relief pipe, the protecgulum is hindering the firetube top through the screw switching, it has the second rubber packing ring to compress tightly between protecgulum and the back-fire relief pipe, the back lid is hindering the firetube bottom through the screw switching, it has first rubber packing ring to compress tightly between back lid and the back-fire relief pipe, the bottom and the back lid of flange pipe link to each other, the check valve is a top seal's pipe, the check valve cover is established on the flange pipe, the bottom of check valve is equipped with the. The utility model discloses an installation multi-hole back-fire relief piece of multilayer in back-fire relief pipe realizes the effect of back-fire relief, utilizes mutually supporting between check valve and the flange pipe to make the passageway closed when taking place to temper, and protecgulum and hou gai pass through the screw thread switching at the both ends that hinder the firetube simultaneously, conveniently hinder firetube dismantlement and maintenance.

Description

Novel backfire arrester

Technical Field

The utility model relates to a fire and explosion protection field especially relates to a novel backfire arrester.

Background

The backfire arrestor is divided into a dry backfire arrestor and a water-sealed backfire arrestor, the current dry backfire arrestor is widely used, the dry backfire arrestor mainly utilizes a fire retardant to reduce the temperature of the reflowing flame to be below a fire point, the current dry backfire arrestor on the market is usually made by sintering stainless steel powder, the finished product rate of the fire retardant made by the method is not high, the ventilation efficiency of the finished product is not high, and the resistance is large when the airflow normally passes through; the existing backfire arrestor has a fixed structure, and a product cannot be disassembled for maintenance; the traditional check valve has a complex structure and is not beneficial to production and maintenance.

Disclosure of Invention

To the problem mentioned in the above-mentioned background art, the utility model provides a novel flashback arrestor, include: the fire-retarding pipe comprises a fire-retarding pipe, a front cover, a rear cover, a flange pipe, a check valve, a spring, fire-retarding sheets, a first rubber gasket and a second rubber gasket, wherein the fire-retarding pipe is a cylindrical pipe, the fire-retarding sheets are respectively installed in the fire-retarding pipe, grooves are respectively formed in the upper end and the lower end of the fire-retarding pipe, thread grooves are formed in the grooves, threads are carved in the bottom of the front cover, the bottom of the front cover is rotatably connected into the thread grooves in the top of the fire-retarding pipe, the second rubber gasket is installed between the fire-retarding pipe and the front cover, threads are arranged in the top of the rear cover, the top of the rear cover is rotatably connected into the thread grooves in the bottom of the fire-retarding pipe, the first rubber gasket is installed between the fire-retarding pipe and the rear cover, the top of the flange pipe is outwards protruded, the bottom of the flange pipe is connected with the rear cover, and the check valve, the check valve cover is established on the flange pipe, the bottom of check valve is equipped with the spacing collar, the spacing collar with check valve integrated into one piece, the spring mounting be in the spacing collar with between the back lid.

Furthermore, an air outlet which penetrates through the front cover from top to bottom is formed in the front cover, the air outlet of the front cover is communicated with the inner channel of the fire-resisting pipe, an air inlet which penetrates through the rear cover from top to bottom is formed in the rear cover, and the air inlet of the rear cover is communicated with the flange pipe.

Furthermore, the air holes on the two adjacent fire retardant sheets are staggered with each other.

Furthermore, the fire retarding pipe and the fire retarding sheet are made of refractory materials with high heat conductivity coefficients.

Furthermore, the fire retarding pipe and the fire retarding sheet are made of copper-iron alloy materials.

Further, the spring is made of alloy steel, and the alloy steel is medium-high carbon steel added with silicon and manganese.

Furthermore, a stainless steel mesh is arranged between the fire retardant pieces.

Compared with the prior art, the utility model provides a novel backfire arrestor has following beneficial effect:

1, the utility model discloses at a plurality of layers of back-fire relief piece of back-fire relief intraductal installation of back-fire relief and stainless steel mesh piece, utilize back-fire relief piece and stainless steel mesh piece high thermal conductivity to guarantee good circulation when playing the back-fire relief effect, gas can be fine through the back-fire relief pipe.

2, the utility model discloses a mode and back fire relief union coupling that protecgulum and back lid pass through the screw thread switching make things convenient for the production of back fire prevention ware, convenient to detach and maintenance simultaneously.

3, when taking place the tempering the utility model discloses utilize between check valve and the flange pipe mutually support and make the passageway closed, simple structure is convenient for production and later stage maintenance.

Drawings

Fig. 1 is a schematic cross-sectional view of a novel flashback arrestor.

Wherein: 1-fire-resistant pipe, 2-front cover, 3-rear cover, 4-flange pipe, 5-check valve, 6-spring, 7-fire-retardant plate, 8-first rubber gasket, 9-second rubber gasket, 10-spacing ring and 11-stainless steel mesh.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides a novel backfire arrester, include: the flame retardant tube comprises a flame retardant tube 1, a front cover 2, a rear cover 3, a flange tube 4, a check valve 5, a spring 6, flame retardant sheets 7, a first rubber washer 8 and a second rubber washer 9, wherein the flame retardant tube 1 is a cylindrical tube, a plurality of flame retardant sheets 7 are respectively installed in the flame retardant tube 1, a stainless steel mesh sheet 11 is installed between the flame retardant sheets 7, air holes on the two adjacent flame retardant sheets 7 are mutually staggered, the flame retardant tube 1 and the flame retardant sheets 7 are made of copper-iron alloy materials, grooves are respectively arranged at the upper end and the lower end of the flame retardant tube 1, thread grooves are formed in the grooves, threads are carved at the bottom of the front cover 2, the bottom of the front cover 2 is rotatably connected in the thread grooves at the top of the flame retardant tube 1, the second rubber washer 9 is installed between the flame retardant tube 1 and the front cover 2, threads are arranged at the top of the rear cover 3, the top of back lid 3 is rotated and is connected in the thread groove of hindering 1 bottoms of firetube, first rubber packing ring 8 is installed hinder firetube 1 with between the back lid 3, the top of flange pipe 4 is outside protruding, the bottom of flange pipe 4 with back lid 3 links to each other, check valve 5 is the sealed pipe in top, 5 covers of check valve are established on the flange pipe 4, the bottom of check valve 5 is equipped with spacing collar 10, spacing collar 10 with 5 integrated into one piece of check valve, spring 6 installs spacing collar 10 with between the back lid 3 spring 6 is made by alloy steel, alloy steel is the medium and high carbon steel that adds silicon and manganese.

An air outlet which penetrates through the front cover 2 from top to bottom is formed in the front cover 2, the air outlet of the front cover 2 is communicated with an inner channel of the fire-resisting pipe 1, an air inlet which penetrates through the rear cover 3 from top to bottom is formed in the rear cover 3, and the air inlet of the rear cover 3 is communicated with the flange pipe 4.

And the upper surface of the limiting ring 10 and the lower outlet of the check valve 5 are fixedly connected with rubber rings for enhancing the air tightness of the check valve during working.

Principle of operation

When the backfire arrester does not work, the spring 6 lifts the check valve 5 upwards, and the limiting ring 10 at the bottom of the check valve 5 is pressed on the flange of the flange pipe 4, so that the pipeline is closed.

During normal work, fuel gas flow gets into flange pipe 4 from the air inlet of back lid 3, and atmospheric pressure compresses check valve 5 downwards, and in fuel gas flow got into the passageway that hinders firetube 1 through the below of check valve, fuel gas flow layer by layer flowed out from the gas outlet of protecgulum 2 through back-fire relief piece 7 and stainless steel mesh piece.

When a backfire phenomenon occurs, burning gas flows into the fire retarding pipe 1 from the gas outlet of the front cover 2, detonation occurs in the fire retarding pipe 1 to generate great pressure, the check valve 5 is pushed downwards, the bottom of the check valve 5 is pressed to the surface of the rear cover 3, and the gas inlet of the rear cover 3 is closed; meanwhile, when the reflowed gas reaches the flame retardant sheet 7 and the stainless steel mesh sheet 8, the flame temperature is absorbed, so that the temperature is reduced to a burning point to achieve the flame retardant and fire extinguishing effect, and the flame is quickly extinguished.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A novel flashback arrestor, comprising: the flame retardant pipe comprises a flame retardant pipe (1), a front cover (2), a rear cover (3), a flange pipe (4), a check valve (5), a spring (6), flame retardant sheets (7), a first rubber gasket (8) and a second rubber gasket (9), wherein the flame retardant pipe (1) is a cylindrical pipe, the flame retardant sheets (7) are respectively arranged in the flame retardant pipe (1), grooves are respectively arranged at the upper end and the lower end of the flame retardant pipe (1), threaded grooves are formed in the grooves, threads are carved on the bottom of the front cover (2), the bottom of the front cover (2) is rotatably connected in the threaded grooves at the top of the flame retardant pipe (1), the second rubber gasket (9) is arranged between the flame retardant pipe (1) and the front cover (2), threads are arranged at the top of the rear cover (3), the top of the rear cover (3) is rotatably connected in the threaded grooves at the bottom of the flame retardant pipe (1), the first rubber gasket (8) is installed between the fire-resisting pipe (1) and the rear cover (3), the top of the flange pipe (4) protrudes outwards, the bottom of the flange pipe (4) is connected with the rear cover (3), the check valve (5) is a round pipe with a sealed top end, the check valve (5) is sleeved on the flange pipe (4), the bottom of the check valve (5) is provided with a limit ring (10), the limit ring (10) and the check valve (5) are integrally formed, and the spring (6) is installed between the limit ring (10) and the rear cover (3).

2. The new backfire arrester as claimed in claim 1, wherein said front cover (2) is provided with an air outlet extending vertically therethrough, said air outlet of said front cover (2) is communicated with said inner channel of said flame-retardant tube (1), said rear cover (3) is provided with an air inlet extending vertically therethrough, and said air inlet of said rear cover (3) is communicated with said flange tube (4).

3. The novel flashback arrestor as set forth in claim 2, wherein the ventilation holes of two adjacent fire retardant sheets (7) are staggered.

4. A novel flashback arrestor as set forth in claim 3, characterized in that the flame retardant tube (1) and the flame retardant plate (7) are made of a refractory material with high thermal conductivity.

5. A new type of flash back preventer according to claim 4, characterized in that the flame retardant tubes (1) and the fire retardant tabs (7) are made of copper-iron alloy material.

6. A new flashback arrestor as set forth in claim 5, characterized in that a stainless steel mesh (11) is installed between the fire stop plates (7).