CN101623788A - Elastic membrane type tempering preventing device with fire-stopping pipe - Google Patents

Abstract

The invention relates to an elastic membrane type tempering preventing device with a fire-stopping pipe, which comprises an air inlet pipe, an outer shell, an elastic membrane, a fire-stopping pipe, a connecting element and a gasket, wherein the outer shell is a circular pipe-shaped metal shell, and a step through hole is arranged in the outer shell; the air inlet pipe is also in a circular metal structure; a blind hole is arranged in the center of the air inlet pipe along an axis, and more than two uniformly distributed exhaust through holes are arranged at the circumference of the air inlet pipe along the direction of the axis; the fire-stopping pipe is fixedly connected with the connecting element; the connecting element and the fire-stopping pipe are butted and installed on the end surface of the step through hole in the outer shell by placing the gasket through the air inlet pipe; the elastic membrane is sleeved on each row of exhaust holes of the air inlet pipe, and the air inlet pipe is fixedly connected to the inner part of the outer shell by threads; when a tempering phenomenon is generated, the flame entering an inner cavity is blocked or extinguished by the fire-stopping pipe, a pressure wave enters the inner cavity of the outer shell prior to deflagrating flame, and the elastic membrane plays a role by the pressure rise of the inner cavity of the outer shell so as to cut off an air loop, thereby effectively ensuring the safety of equipment and preventing the damage of the tempering phenomenon on the equipment.

Description

The elastic membrane type tempering preventing device of band fire-stopping pipe

Technical field

The present invention relates to a kind of backfire controller, relate in particular to a kind of elastic membrane type tempering preventing device, belong to mechanical structure field with fire-stopping pipe.

Background technology

At present, generally used a kind of mechanical type backfire controller pressure relief device when carrying out metal gas welding, cutting, flowed back to the blast that gas source causes equipment to stop flame with flame.Thereby the structure of this backfire controller and principle are the explosive force that produces during by tempering to be promoted piston, spring, valve rod and closes air inlet and block gas return path.But because temperature is higher, easily make spring produce annealing in this device, lose elasticity, cause fault.If easier being corroded when meeting corrosive liquids or gas and lose spring function, thereby make the disabler of temper device.

Summary of the invention

The invention provides a kind of elastic membrane type tempering preventing device with fire-stopping pipe, by adopting a kind of elastic performance good, reset being used in combination of fast, stroke weak point, antifatigue, high temperature resistant, corrosion resistant adhesive film material and fire-stopping pipe, thus can stop flame to flow backwards reliably and be burned to the safety of gas source assurance operating equipment.

A kind of elastic membrane type tempering preventing device with fire-stopping pipe, comprise air inlet pipe, shell, elastic force film, fire-stopping pipe, connector and pad, wherein shell is round tubular metal shell, along the housing axis direction through hole is arranged, there is a step at 2/3rds places, through hole inside, and the through hole of left end is greater than right-hand member; Air inlet pipe also is the circular metal structure, and according to the variation of external diameter, visible air inlet pipe is divided into 4 stages, the section of stretching out EA, left side section AB, stage casing BC, right section CD, wherein, the external diameter of left side section AB is greater than the external diameter of right section CD, and the external diameter of right section CD is greater than the external diameter of stage casing BC, the external diameter of right section CD is less than the aperture of shell, the plural vent hole that goes out is arranged on the air inlet tube wall on the BC of stage casing, have blind hole on the air inlet pipe axis direction, the length of this blind hole runs through left side section AB and stage casing BC; The elastic force film is a Rubber membrane cover; Connector is the disc plastic member, and there is through hole at the center; Its annexation is: fire-stopping pipe is fixedlyed connected with connector, and the end face of connector is conflicted and is installed on the stepped hole end face of enclosure; Pad is installed in the left side of fire-stopping pipe, the elastic force Membrane cover is connected on the BC external diameter of stage casing, conflict with pad and be connected in the right side of air inlet pipe, the external diameter of left side section AB is conflicted with the internal diameter of shell and is connected, the section of the stretching out EA of air inlet pipe is positioned at outside the shell, the left side section AB of air inlet pipe, the right section of stage casing BC CD is arranged in the through hole of shell, and the external diameter of right section CD is connected cooperation with the internal diameter gap of shell; When the gas from source of the gas arrives air inlet pipe, when pressure reaches certain value the elastic force film is propped up, gas enters solder cutting gun along the through hole of gap on fire-stopping pipe and connector between air inlet pipe and the shell and lights work by going out vent hole, in a single day in when, tempering taking place in the course of work when, in a single day in when, tempering taking place in the course of work when, at first detonation and inwardly propelling rapidly in tube chamber of flame, by fire-stopping pipe the time, be blocked or extinguish, thereby the pressure that detonation simultaneously produces makes the elastic force film be adjacent to and block gas return path with going out vent hole prior to flame, thereby has effectively stoped the generation of equipment implosion.

Beneficial effect: the present invention can be when equipment generation tempering phenomenon, by fire-stopping pipe blocking-up or extinguish the flame that enters inner chamber, pressure wave enters shell inner cavity prior to the flame of detonation simultaneously, the rising of shell inner cavity pressure causes the elastic force film to play a role and blocks gas return path, thereby effectively guarantees the security of equipment and prevent the infringement of tempering phenomenon to equipment.

Description of drawings

Fig. 1 is the structural representation of a kind of elastic membrane type tempering preventing device with fire-stopping pipe of the present invention

Wherein: 1-air inlet pipe, 2-fire-stopping pipe, 3-shell, 4-connector, 5-pad

The specific embodiment

The present invention will be further described below in conjunction with accompanying drawing

As shown in Figure 1, a kind of elastic membrane type tempering preventing device with fire-stopping pipe, comprise air inlet pipe 1, shell 3, elastic force film, fire-stopping pipe 2, connector 4 and pad 5, wherein shell 3 is round tubular metal shell, along shell 3 axis directions through hole is arranged, there is a step at 2/3rds places, through hole inside, and the through hole of left end is greater than right-hand member; Air inlet pipe 1 also is the circular metal structure, variation according to external diameter, as seen air inlet pipe 1 is divided into 4 stages, the section of stretching out EA, left side section AB, stage casing BC, right section CD, wherein, the external diameter of left side section AB is greater than right section external diameter CD, the external diameter CD of right section is greater than the external diameter of stage casing BC, and the external diameter of right section CD is less than the aperture of shell 3, the air inlet pipe 1 on the BC of stage casing circumferentially along axis direction have four row uniform go out vent hole 4, whenever listing vent hole 4 numbers is three, go out the inside and outside wall that vent hole 4 runs through air inlet pipe, have blind hole on the air inlet pipe axis direction, the length of this blind hole runs through left side section AB and stage casing BC; The elastic force film is a Rubber membrane cover; Connector is the disc plastic member, and there is through hole at the center; Its annexation is: fire-stopping pipe 2 is fixedlyed connected with connector 4, and the end face of connector 4 is conflicted and is installed on the stepped hole end face of shell 3 inside; Pad 5 is installed in the left side of fire-stopping pipe 2, the elastic force Membrane cover is connected on the BC external diameter of stage casing, conflict with pad 5 and be connected in the right side of air inlet pipe 1, air inlet pipe 1 is connected by the screw thread of left end external screw thread and shell 3 left end inwalls, and the external diameter of right section CD is connected cooperation with the internal diameter gap of shell 3; When the gas from source of the gas arrives air inlet pipe 1, when pressure reaches certain value gas by venthole the elastic force film is propped up, gas enters solder cutting gun along the through hole of gap on fire-stopping pipe 2 and connector 4 between air inlet pipe 1 and the shell 3 and lights work by going out vent hole, in a single day in when, tempering taking place in the course of work when, flame at first enters fire-stopping pipe inside, flame then can not pass through fire-stopping pipe 2, thereby block gas return path but the pressure that fire-stopping pipe 2 inner chamber detonations produce is adjacent to elastic force film and venthole, thereby effectively stoped the generation of equipment implosion.

Claims (2)

1, the elastic membrane type tempering preventing device of band fire-stopping pipe, comprise air inlet pipe (1), shell (3), elastic force film, fire-stopping pipe (2), connector (4) and pad (5), it is characterized in that: shell (3) is round tubular metal shell, along shell (3) axis direction through hole is arranged, there is a step at 2/3rds places, through hole inside, and the through hole of left end is greater than right-hand member; Air inlet pipe (1) also is the circular metal structure, according to the variation of external diameter, visible air inlet pipe (1) is divided into 4 stages, the section of stretching out EA, left side section AB, stage casing BC, right section CD, wherein the external diameter of left side section AB is greater than right section CD external diameter, the external diameter of right section CD is greater than the external diameter of stage casing BC and less than the aperture of shell, the plural vent hole that goes out is arranged on the air inlet pipe on the BC of stage casing (1) wall, have blind hole on the air inlet pipe axis direction, the length of this blind hole runs through left side section AB and stage casing BC; The elastic force film is a Rubber membrane cover; Connector is the disc plastic member, and there is through hole at the center; Its annexation is: fire-stopping pipe (2) is fixedlyed connected with connector (4), and the end face of connector (4) is conflicted and is installed on the inner stepped hole end face of shell (3); Pad (5) is installed in the left side of fire-stopping pipe (2), the elastic force Membrane cover is connected on the BC external diameter of stage casing, conflict with pad (5) and be connected in the right side of air inlet pipe (1), the external diameter of left side section AB is conflicted with the internal diameter of shell (3) and is connected, the section of the stretching out EA of air inlet pipe (1) is positioned at outside the shell (3), the left side section AB of air inlet pipe (1), the right section of stage casing BC CD is arranged in the through hole of shell (3), the external diameter of right section CD and the internal diameter matched in clearance of shell (3).

2, the elastic membrane type tempering preventing device of band fire-stopping pipe as claimed in claim 1 is characterized in that: the venthole on the air inlet pipe (1) is arranged along air inlet pipe (1) axis direction, and number is more than two row, whenever lists the pore number more than two.

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