CN105240856A

CN105240856A - Dry tempering flashback arrestor

Info

Publication number: CN105240856A
Application number: CN201510669104.6A
Authority: CN
Inventors: 王丹
Original assignee: Tongcheng Liqiong Metal Products Co Ltd
Current assignee: Nantong Zhongxing multielement composite steel tube Co., Ltd.
Priority date: 2015-10-18
Filing date: 2015-10-18
Publication date: 2016-01-13
Anticipated expiration: 2035-10-18
Also published as: CN105240856B

Abstract

The invention relates to a dry tempering flashback arrestor. The dry tempering flashback arrestor comprises a front end cover, a back end cover, a copper pipe, a fire retardance body and a check valve; the two ends of the copper pipe are connected with the front end cover and the back end cover respectively, a gasket A and a gasket B are arranged at the connecting positions respectively, and two ports of the fire retardance body are closed through the front end cover and a spring base; and the two ends of the spring abut against the check valve and the spring base respectively so that a gas inlet can be sealed through the check valve. According to the dry tempering flashback arrestor, the fire retardance body made of a heat-resisting material with the good heat-conducting property is adopted, the resistance of the fire retardance body is small, the heat absorption capacity is better, the flame during tempering can be extinguished rapidly, and the dry tempering flashback arrestor is safe and reliable.

Description

A kind of dry flashback arrestor

Technical field

The present invention relates to flash-back arrestor field, particularly relate to resistance when one is ventilated little, the dry flashback arrestor that cooling velocity is fast when tempering.

Background technology

The flash-back arrestor (also claiming flashback arrester) used in the market has two kinds, i.e. dry flashback arrestor and water-sealing back fire arrester.These two kinds of flash-back arrestor operation principles and structure different: water-sealing back fire arrester is when normally working, and acetylene enters from bottom air inlet, backs down check-valves, enters weldering (cutting) torch through cleaner from gas outlet.When flashing back, flame is from gas outlet tank switching, back down rubber membrane, make combustion flame escape into air from gas vent, combustion flame pressure closes check (non-return) valve on the other hand, cutting gas circuit, flame is made to enter acetylene gas generating device, in addition, the water in cylindrical shell has also blocked the path of flame, plays the effect of insurance.Its major defect is the effect that the air-flow larger to combustion pressure does not have prevention, and then effectively can not stop tempering, and therefore, such flash-back arrestor now seldom has manufacturer in production; And dry annealing prevents the principle utilized from being utilize back-fire relief body the flame temperature of backflow to be dropped to below ignition point, utilize check (non-return) valve to close source of the gas simultaneously, burning is stopped, in prior art, the heat conductivility of back-fire relief body is not good enough, and do not occurring under Annealed Strip, air-flow normal through time resistance large, cause the pressure loss of air-flow larger.

Summary of the invention

The present invention, in order to overcome deficiency of the prior art, provides resistance when one is ventilated little, the flash-back arrestor that cooling velocity is fast when tempering.

The present invention is achieved through the following technical solutions:

A kind of dry flashback arrestor, comprise drive end bearing bracket, rear end cap, copper pipe, back-fire relief body, check (non-return) valve, spring, the two ends of described copper pipe are threaded connection with drive end bearing bracket, rear end cap respectively, and junction has packing ring A, packing ring B respectively, to play sealing function, prevent gas leak; Described drive end bearing bracket has into valve, rear end cap has outlet nozzle; Described back-fire relief body two-port is closed by drive end bearing bracket and spring base respectively, and described both ends of the spring is against on check (non-return) valve and spring base respectively, entering before valve place passes into gas, makes check (non-return) valve seal gas access; Described back-fire relief body comprises back-fire relief pipe and fin, arranges the fin axially equidistantly arranged along back-fire relief pipe, fin has the breach equidistantly arranged along back-fire relief pipe circumferencial direction outside back-fire relief pipe, and there is multiple aperture between adjacent fins and fin two ends; The material of described back-fire relief body is the refractory material that thermal conductivity factor is higher.

As the preferred technical solution of the present invention, the material of described back-fire relief body is copper, and the thermal conductivity factor of copper is large, is the good conductor of heat, and high temperature during copper resistance to tempering, ensure that the service life of back-fire relief body.

After opening source of the gas, fuel gas flows into flash-back arrestor from entering valve, and the both sides of check (non-return) valve form pressure reduction, enter valve one lateral pressure larger, air pressure forces spring-compressed, check (non-return) valve moves to spring base side, and gas enters inside back-fire relief body, flows out from the aperture back-fire relief pipe, the gap of fin and breach on back-fire relief body, cavity between back-fire relief body and copper pipe, then the pore on spring base, flow out from outlet nozzle.

When there is tempering phenomenon, the gas of burning flows into flash-back arrestor from outlet nozzle, because the gas pressure of detonation in small space is very large, enter valve place air pressure and flash-back arrestor internal gas pressure forms pressure reduction, in flash-back arrestor, pressure is comparatively large, now, check (non-return) valve resets, confining gas entrance; Meanwhile, the gas backstreaming of burning is to back-fire relief body place, and the fin on back-fire relief body absorbs the heat of gas, distribute, reduce flame temperature, and, aperture on catwalk on back-fire relief body between fin and back-fire relief pipe, all contributes to knock down the flame, reaches the effect preventing tempering.

Compared with prior art, the invention has the beneficial effects as follows: a kind of dry flashback arrestor of the present invention, by the back-fire relief body adopting the heat-resisting material of good heat conductivity to make, the resistance of this back-fire relief body is little, heat absorption capacity is better, can extinguish flame during tempering sooner, safe and reliable.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention;

Fig. 2 is the isometric views of back-fire relief body of the present invention;

Fig. 3 is the front view of back-fire relief body of the present invention.

In figure: 1, enter valve; 2, drive end bearing bracket; 3, packing ring A; 4, copper pipe; 5, packing ring B; 6, rear end cap; 7, check (non-return) valve; 8, back-fire relief body; 8a, back-fire relief pipe; 8b, fin; 8c, aperture; 8d, breach; 9, spring; 10, pore; 11, spring base; 12, outlet nozzle.

Detailed description of the invention

In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.

Refer to Fig. 1, Fig. 2, Fig. 3, Fig. 1 is structural representation of the present invention; Fig. 2 is the isometric views of back-fire relief body of the present invention; Fig. 3 is the front view of back-fire relief body of the present invention.

Described a kind of dry flashback arrestor, comprise drive end bearing bracket 2, rear end cap 6, copper pipe 4, back-fire relief body 8, check (non-return) valve 7, spring 9, the two ends of described copper pipe 4 are threaded connection with drive end bearing bracket 2, rear end cap 6 respectively, junction has packing ring A3, packing ring B5 respectively, to play sealing function, prevent gas leak; Described drive end bearing bracket 2 has into valve 1, rear end cap 6 has outlet nozzle 12; Described back-fire relief body 8 two-port is closed by drive end bearing bracket 2 and spring base 11 respectively, and described spring 9 two ends are against on check (non-return) valve 7 and spring base 11 respectively, entering before valve 1 place passes into gas, makes check (non-return) valve 7 seal gas access; Described back-fire relief body 8 comprises back-fire relief pipe 8a and fin 8b, the fin 8b axially equidistantly arranged along back-fire relief pipe 8a is arranged outside back-fire relief pipe 8a, fin 8b has the breach 8d equidistantly arranged along back-fire relief pipe 8a circumferencial direction, there is multiple aperture 8c between adjacent fins 8b and fin 8b two ends; The material of described back-fire relief body 8 is the refractory material that thermal conductivity factor is higher.

As a preferred embodiment of the present invention, the material of described back-fire relief body 8 is copper, and the thermal conductivity factor of copper is large, is the good conductor of heat, and high temperature during copper resistance to tempering.

After opening source of the gas, fuel gas flows into flash-back arrestor from entering valve 1, and the both sides of check (non-return) valve 7 form pressure reduction, enter valve 1 one lateral pressure larger, air pressure forces spring 9 to compress, check (non-return) valve 7 moves to spring base 11 side, and gas enters inside back-fire relief body 8, flows out from the aperture 8c back-fire relief pipe 8a, the gap of fin 8b and breach 8d on back-fire relief body 8, cavity between back-fire relief body 8 and copper pipe 4, then the pore 10 on spring base 11, flow out from outlet nozzle 12.

When there is tempering phenomenon, the gas of burning flows into flash-back arrestor from outlet nozzle 12, because the gas pressure of detonation in small space is very large, enter valve 1 place's air pressure and flash-back arrestor internal gas pressure forms pressure reduction, in flash-back arrestor, pressure is comparatively large, now, check (non-return) valve 7 resets, confining gas entrance; Meanwhile, the gas backstreaming of burning is to back-fire relief body 8 place, and the fin 8b on back-fire relief body 8 absorbs the heat of burning gases, distribute, reduce flame temperature, and, aperture 8c on catwalk on back-fire relief body 8 between fin 8b and back-fire relief pipe 8a, all contributes to knock down the flame.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims

1. a dry flashback arrestor, comprise drive end bearing bracket (2), rear end cap (6), copper pipe (4), back-fire relief body (8), check (non-return) valve (7), spring (9), the two ends of described copper pipe (4) respectively with drive end bearing bracket (2), rear end cap (6) connects, junction has packing ring A(3 respectively), packing ring B(5), described drive end bearing bracket (2) is gas access, rear end cap (6) is gas vent, described back-fire relief body (8) is cylindric, back-fire relief body (8) two-port is closed by drive end bearing bracket (2) and spring base (11) respectively, described spring (9) two ends are against on check (non-return) valve (7) and spring base (11) respectively, check (non-return) valve (7) is made to seal gas access, it is characterized in that: described back-fire relief body (8) comprises back-fire relief pipe (8a) and fin (8b), back-fire relief pipe (8a) outside is furnished with the fin (8b) axially equidistantly arranged along back-fire relief pipe (8a), fin (8b) offers the breach (8d) equidistantly arranged along back-fire relief pipe (8a) circumferencial direction, multiple aperture (8c) is offered between adjacent fins (8b) and fin (8b) two ends.

2. a kind of dry flashback arrestor according to claim 1, is characterized in that: the material of described back-fire relief body (8) is the refractory material that thermal conductivity factor is higher.

3. a kind of dry flashback arrestor according to claim 2, is characterized in that: the material of described back-fire relief body (8) is copper.