CN104941952A - Flashback arrestor maintaining method - Google Patents

Abstract

The invention discloses a flashback arrestor maintaining method for ship construction gas welding or gas cutting or fire work. The method comprises the steps that a compressed air connector is additionally installed at one end of a flashback arrestor to be maintained, and a steel needle with the small diameter for pipe dredging is prepared at the other end of the flashback arrestor to be maintained; 2, an air rubber pipe is taken, one end of the air rubber pipe is connected with a compressed air pipeline air supply device connector on a production site, and the other end of the air rubber pipe is connected with the compressed air connector of the flashback arrestor; 3, a switch of a compressed air pipeline air supply device on the production site is turned on, and air is led into the air rubber pipe; 4, under the effect of compressed air, garbage in the flashback arrestor is rapidly blown out. By means of the flashback arrestor maintaining method, the using frequency of the flashback arrestor is improved, the service life of the flashback arrestor is prolonged, the defect that a flashback arrestor is installed and used for one time and the labor waiting and safety defects caused by purchasing time are fundamentally eliminated, the production cost is lowered, and safe production is ensured.

Description

A kind of method for maintaining of flash-back arrestor

Technical field

The invention belongs to the fields such as ship steel structure gas welding or torch operation, is a kind ofly be applicable under complexity has the production environment of metallic dust particle, the method for maintaining of flash-back arrestor in gas welding or gas cutting tool.

Background technology

Often can use the operations such as welding rod gas welding gas cutting and flame forming plate during the manufacturing enterprises such as present shipbuilding, steel construction and pressure vessel produce, the instrument provided in operation all needs to install flash-back arrestor for security consideration.The position of flash-back arrestor is arranged in the middle of acetylene rubber hose and acetylene generator.Usual flash-back arrestor pressing force is divided into low pressure (below 0.01MPa) and middle pressure type (0.01 ~ 0.15MPa) two kinds; Hydrolock and dry flashback arrestor can be divided into by action principle; Centralized and post formula flash-back arrestor two kinds can be divided into by structure.

Shipbuilding, steel construction and pressure vessel enterprise generally adopt centralized water-sealing back fire arrester in air feed source, production scene adopts in dry type and presses flash-back arrestor, often all needs installation flash-back arrestor in the middle of welding torch or gas cutting tool acetylene rubber hose and acetylene air supply source.Often owing to there being small rubbish to block the reasons such as pore causes flash-back arrestor to block or pressure is inadequate in gas pipeline in actual production, flash-back arrestor is caused normally not use, the flash-back arrestor that user needs often maintenance or frequently more renews, and in fact only the rubbish need removed in flash-back arrestor can normally use, cause the significant wastage of flash-back arrestor, production cost constantly rises.

Summary of the invention

The object of the invention is to overcome the deficiency existed in original maintenance technique, a kind of method for maintaining of flash-back arrestor is provided, fundamentally eliminate that drawback that flash-back arrestor single installs and uses and buying hour cause etc. work and safe drawback, improve the frequency of utilization of flash-back arrestor, again reduce production cost and ensure safety in production.

In order to reach foregoing invention object, this technical scheme proposes as follows:

For a method for maintaining for flash-back arrestor in shipbuilding gas welding, gas cutting or hot work, its feature is, the method comprises the steps:

1. install compressed air joint additional in flash-back arrestor one end to be repaired, compressed air joint and tempering prevent from being threaded connection, the thin diameter draw point of the accurate dredging pipeline of the other end;

2. get an air hose, be connected with the compressed air hose pipeline gas supply device interface of production scene its one end, the other end is connected with the compressed air joint of flash-back arrestor;

3. open the switch of the compressed air hose pipeline gas supply device of production scene, ventilate in air hose, the other end of draw point from flash-back arrestor is internally put in simultaneously, until back down the spring assembly in flash-back arrestor;

4. after spring assembly is backed down, the gas piping in flash-back arrestor starts through, and under compressed-air actuated effect, the rubbish in flash-back arrestor is blown out fast.

Preferably, for thoroughly removing the rubbish in flash-back arrestor, all right reverse operating, namely

5. inflated to flash-back arrestor from opposite side by compressed air hose pipeline gas supply device, self have the compressed air of certain pressure to be enough to spring assembly to back down, make the gas piping in flash-back arrestor, by rubbish blowout wherein.

Compared with prior art, technique effect of the present invention is:

In production scene, rapid-maintenance is carried out to flash-back arrestor, rubbish in flash-back arrestor is thoroughly removed totally, change traditional special fixed point maintenance and the frequent situation changed, contribute to the operations such as gas cutting and carry out fast continuously, reduce production cost and improve production efficiency.

Accompanying drawing explanation

Fig. 1 is flash-back arrestor cut-away view;

Fig. 2 is that flash-back arrestor adds compressed air joint schematic diagram;

Fig. 3 is for using draw point dredging pipeline schematic diagram;

Fig. 4 is the schematic diagram not using draw point.

In figure: 1, nut 2, flash-back arrestor external module 3, fire-stopping pipe 4, spring assembly 5, flash-back arrestor intraware 6, pin 7, joint 8, compressed air joint 9, air hose.

Detailed description of the invention

Below in conjunction with embodiment and accompanying drawing, the invention will be further described, but should not limit the scope of the invention with this.

Embodiment: for the method for maintaining of the flash-back arrestor that dock production scene uses, comprise the steps:

(1) compressed air joint (see Fig. 2) is installed additional in flash-back arrestor (internal structure is shown in Fig. 1) one end, compressed air joint and tempering prevent employing to be threaded, the draw point of the accurate thin diameter of the other end, draw point diameter 1mm, length 50mm, wherein one end is coiled into circle.

(2) get an air hose, one end is connected with the compressed air hose pipeline gas supply device interface of production scene, and the compressed air joint of the other end and flash-back arrestor, to being connected, is shown in Fig. 3;

(3) open the switch of on-the-spot compressed air hose pipeline gas supply device, ventilate in sebific duct, simultaneously the draw point of the other end puts in the inside of flash-back arrestor, until back down the spring assembly in flash-back arrestor, sees Fig. 1.

(4) after spring assembly backs down, the gas piping in flash-back arrestor starts through, and under compressed-air actuated effect, the rubbish in flash-back arrestor is removed fast, sees Fig. 3.

(5) be the rubbish thoroughly removed in flash-back arrestor, also can reverse operating, compressed air joint is inflated to flash-back arrestor from opposite side, the compressed air of certain pressure self is had to be enough to spring assembly to back down, make gas circuit through, by rubbish blowout wherein, see Fig. 4.

It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to the technical scheme of invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.

Claims (2)

1., for a method for maintaining for flash-back arrestor in shipbuilding gas welding, gas cutting or hot work, it is characterized in that, the method comprises the steps:

1. install compressed air joint additional in flash-back arrestor one end to be repaired, compressed air joint and tempering prevent from being threaded connection, the thin diameter draw point of the accurate dredging pipeline of the other end;

2. get an air hose, be connected with the compressed air hose pipeline gas supply device interface of production scene its one end, the other end is connected with the compressed air joint of flash-back arrestor;

3. open the switch of the compressed air hose pipeline gas supply device of production scene, ventilate in air hose, the other end of draw point from flash-back arrestor is internally put in simultaneously, until back down the spring assembly in flash-back arrestor;

4. after spring assembly is backed down, the gas piping in flash-back arrestor starts through, and under compressed-air actuated effect, the rubbish in flash-back arrestor is blown out fast.

2. the method for maintaining of flash-back arrestor according to claim 1, is characterized in that, the method also comprises:

5. inflated to flash-back arrestor from opposite side by compressed air hose pipeline gas supply device, self have the compressed air of certain pressure to be enough to spring assembly to back down, make the gas piping in flash-back arrestor, by rubbish blowout wherein.