KR20070011645A - Gas back fire arrester and back fire arresting system - Google Patents

Abstract

A gas flashback arrester and a backfire removal system comprising the same are provided to protect a gas supply device and secure safety of users by preventing diffusion of backfired flame and essentially removing the backfired flame more promptly and safely. A gas flashback arrester(10) comprises: a cylindrical flashback arrester body(12) having a gas inlet formed at one end thereof, and a gas outlet(144) formed at the other end thereof; a first diaphragm(18) which is spaced in a predetermined distance from an inner wall of the inlet side of the flashback arrester body to define a predetermined space, and on which a plurality of gas holes(38) are formed in a predetermined distance along the circumference thereof such that the gas holes are spaced from the center thereof in a predetermined distance, and a second diaphragm(20) which is formed approximately in the middle of the body with being distanced from the first diaphragm in a predetermined distance, and has a gas hole formed at a central part thereof; a first cylindrical flame removal material(22) which is installed at the center between the first and second diaphragms and has a diameter smaller than an inner diameter of the body to define a predetermined space, and through which gas except a backfired flame passes; and a second cylindrical flame removal material(24) which is installed at the center between the second diaphragm and a body cover(16) of the gas outlet of the flashback arrester and has a diameter smaller than an inner diameter of the body to define a predetermined space, and through which gas except a backfired flame passes.

Description

Gas back fire arrester and back fire arresting system

     1 is a block diagram of a gas flashback prevention and flashback removal system according to an embodiment of the present invention.

     Figure 2 is a cross-sectional view in accordance with an embodiment of the present invention.

     <Explanation of symbols for the main parts of the drawings>

     10: flashback arrestor 12: flashback arrestor body

     14 gas inlet body cover 16 gas outlet body cover

     18: first diaphragm 20: second diaphragm

     22: first sintered filter 24: second sintered filter

     32: first space 34: second space

     36: third space 38: gas hole

     40: check valve 42: check valve body

     44: check valve flan 46: check valve O-ring

     48: check valve spring

     50: safety valve 52: safety valve body

     54: safety valve port 56: safety valve spring

     58: safety valve outlet

     70: backfire sensor 72: body

     74: sensor 76: sensor fixing guide

     78: glass 90: solenoid valve

     92: solenoid valve for air supply

     94: solenoid valve for gas supply

     96: solenoid valve for gas discharge

     100: Brown's Gas Generator or other gas storage tank

     120: air compressor 130: control box

     132: green lamp 134: red lamp

     136: reset switch

     140: Gas Torch or Gas Cutter Tip

     142 gas inlet 144 gas outlet

    The present invention relates to a device using a fossil fuel LPG, LNG, acetylene or Brown's Gas as a combustion source of the flame backfired when the gas is ignited by using a gas torch or a gas cutter Tip The present invention relates to a flame arrester that prevents diffusion and to shut off the supply of gas during flashback, to remove flames quickly and safely, and to a flame removal system.

    Existing flashback arrestors currently used in various industries do not guarantee excellent safety when LPG, LNG, acetylene, etc. are used in gas stoves or gas cutter tips, and large accidents are often caused by explosions.

    The present invention is to solve the problems as described above through the flame retardant to backfire the flame from gas stove or gas cutter tip, such as LPG, LNG, acetylene or Brown's Gas that is ignited in the ignited state 1 By preventing the spread of flames on a secondary basis and providing a secondary flame retardant system, it does not only have the function of preventing the spread of flames that are backfired in the existing device, but also prevents the spread of flames that are backfired and backfired. It is an object of the present invention to provide a flashback prevention and flashback removal system which can protect the gas supply by fundamentally eliminating swiftly and safely, and in particular, ensure the safety of the user.

    The present invention provides a flame arrestor (10) for preventing flame backfire and a check valve (40) for preventing a backflow of gas to close the gas stove in order to achieve the object as described above. It provides a flashback prevention device composed of a safety valve (50) that discharges it when the pressure rises.Secondary flame sensor, air compressor, and a plurality of solenoid valves are installed secondly to the gas stove to detect backfired flame and prevent backflow of gas. It provides a backfire removal system that includes the ability to shut off the gas supply and remove flames.

    An inlet 142 is formed at one end of the flashback arrestor body, and a cylindrical body 12 having an outlet 144 formed at the other end thereof, and a predetermined space away from the inner wall of the inlet 142 side of the body to make a predetermined space. The second diaphragm 20 is formed in the middle of the body at a predetermined distance from the first diaphragm 18 having a plurality of gas holes formed at a predetermined distance along the circumference and spaced apart from the center by a predetermined distance. And a flame retardant formed of a cylindrical first (22) and second (24) sintering filter formed by sintering a metal material which does not pass through the flame and does not pass through the flame.

   In addition, a check valve 40 having a separate body 42 directly connected to the flashback arrestor body is mounted on the inlet side body cover 14 of the flashback arrestor. Or to prevent backflow to other gas storage tanks, and the flames of gas are rapidly increased when the pressure is reversed, which can impact various equipment such as gas torch or gas cutter tip. Safety valve 50 is characterized in that the discharge to the outside is configured separately in the front end of the outlet of the flashback arrestor.

 In addition, the present invention provides a flashback removal system to meet the above object, the flashback removal system detects the backfire flame with a sensor to operate various solenoid valves, etc., characterized in that to block the gas outflow have.

    Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

    As shown in Figure 1, the gas flashback prevention and flashback removal system according to the present invention is characterized by the configuration of a flashback arrestor, a check valve, a safety valve, a flashback sensor, a solenoid valve, an air compressor, a control box.

    One end of the cylindrical body of the flashback arrestor 10 has a gas inlet 142, the other end is formed with a gas outlet 144. In addition, the inlet 142 induces inflow of gas in a form in which a check valve 40 is connected, and a safety valve and a flashback sensor are connected to the outlet, and a gas stove or gas cutter 140 is connected through the safety valve. The outflow gas is ejected in the ignited state, and thus the gas torch or the gas cutter Tip 140 is used as a combustion mechanism of the gas.

    As shown in FIG. 2, a double diaphragm is formed inside the flashback arrestor body 12 in the longitudinal direction of the body, and the first diaphragm 18 and the second diaphragm 20, the second diaphragm and the outlet body cover Cylindrical flame removing materials 22 and 24 are provided between the 16 portions. The flame removing material is a material for removing a flame, and is a sintering filter formed by sintering a metal material and dispersing a backfired flame in a double sintering filter to remove a large amount of backfired flames in a short time. Through this, the flame material filters the gas so that the flame does not pass.

    For convenience of description, the first diaphragm 18 and the diaphragm located in the center of the body are defined as the second diaphragm 20 from two gas diaphragms formed in the body. In addition, the space formed between the first diaphragm 18 and the inner wall surface of the gas inlet body cover 14 is defined as a first space 32, and the first diaphragm 18 and the first diaphragm 18 and The space between the outer circumference of the flame removing material 22 installed between the second diaphragm and the wall surface of the body 12 is defined as a second space 34, and between the second diaphragm 20 and the gas outlet body cover 16. The space between the outer circumference of the flame removing material 24 installed in the wall and the wall surface of the body 12 is defined as a third space 36, and the first diaphragm 18 has a first space 32 and a second space 34. ), A plurality of gas holes 38 communicating with the third space 36 are formed at regular intervals along the circumference of the diaphragm.

    In addition, a check valve 40 is installed at one side of the flashback arrestor gas inlet body cover 16 to prevent backflow of the flashing gas and flame, and the check valve body 42 is directly connected to the flashback arrestor inlet. It is It forms the flow guide space of the check valve planner 44 which serves as a blocking film which blocks backfired gas or flame back. A spring 48 is installed between the flashback arrestor gas inlet body cover 16 and the flanza so that the check valve planar 44 is in close contact with the check valve body 42 when there is no inflow of the gas. In addition, the check valve planner 44 is formed with an O-ring 46 for hermetically blocking the gas or flame flowing backward to prevent the gas or flame from proceeding in the reverse direction.

    If the backflow is not discharged from the check valve or the flame is not discharged, the pressure rises rapidly when the backfire occurs, which may cause damage to the gas stove, the gas cutter tip 140, or other equipment. As shown in FIG. The safety valve 50 is mounted on one side of the gas outlet body cover. The safety valve 50 is formed of a body 52, a port 54, a spring 56, and an outlet 58. When the backfire occurs, when the pressure rapidly expands and exceeds the set discharge pressure, the spring 56 is ported. Push 54 to discharge backfired gas or flame through outlet 60.

    In addition, in order to increase the reliability and stability of achieving the above-described object, by installing a flashback sensor 70 for detecting the light, heat or pressure of the flame backfired on one side of the gas outlet body cover 16 of the flashback arrestor to prevent the flame when the flashback occurs It senses and gives an electrical signal to the control box 130, the control box 130 receives the signal to operate the solenoid valve 90 to push back the gas back to the compressed air and also Brown's Gas generator or other gas storage tank The gas supplied from the 100 is cut off, and the gas remaining in the gas pipe is discharged.

    Flashback sensor 70 is formed of a sensor 74, a guide 76 for fixing the sensor and the body 72, a glass 78 for protecting the sensor.

    In addition, when the amount of gas used increases, the flashback prevention and flashback removal system does not properly control backfired gas or flame, and as illustrated in FIG. 1, the control box 130 may be provided to install a plurality of flashback prevention and removal systems. do.

    1 is a schematic diagram of controlling a gas flashback prevention and removal system in accordance with the present invention. The control box 130 installs a plurality of flashback prevention and removal systems proportional to the capacity of the gases backfired according to the amount of gas used, and branches the backfired gas or flame into the respective flashback prevention and backfire removal systems.

    Also, as shown in FIG. 1, the green lamp 132 and the red lamp 134 are formed to correspond to the respective flashback prevention and removal systems so as to know the state of the flashback prevention and flashback removal system. A reset switch 136 is formed for releasing and reactivating the flashback detection signal of the prevention and removal system.

    Referring to the operation of the present invention configured as described above are as follows.

    As shown in FIG. 2, a gas torch or gas cutter tip 140 is installed at the end of the gas outlet 144 so that the gas is ignited by the gas to the torch or the gas cutter tip 140. When the backfire is flowed back through the outlet 144, the backfire sensor 70 detects the backfire and sends an electrical signal to the control box. The control box receives the flashback detection signal to open the air supply solenoid valve 92 to blow out the compressed air of the compressor 120 toward the flashback arrester 10 to extinguish the flames blocked by the flashback arrestor and the check valve. Blow the residual gas to the gas torch or gas cutter Tip (140).

    The control box blocks the gas supply solenoid valve 94 by receiving the flashback detection signal so that the gas leaked from Brown's Gas generator or other gas storage tank 100 is no longer supplied to the torch or cutter tip 140. Then, the gas discharge solenoid valve 96 is opened to discharge the supplied residual gas.

    In addition, the backfired gas flows into the outlet body cover 16 of the flashback arrestor 10 and flows into the inner circumferential holes of the second sintering filter 24 and the first sintering filter 22, which are flame removing materials, and flows into the sintering filter. Gas is blocked by the first diaphragm 18 so that the flame escapes to the outer circumference of the sintered filter and flows into the second space 34. At this time, the flame is blocked at the moment passing through the sintering filter, and only gas and pressure pass through the gas hole 38 through the sintering filters 22 and 24. At this time, the check valve 40 is closed by the pressure passing through the gas hole 38, and the gas is blocked so as not to flow back by the check valve. When the internal pressure of the flashback arrestor and the gas pipe is increased by the blocked gas and pressure, the safety valve 50 discharges residual gas and pressure. In case of backfire, all backfire and gas back from flame arrester, check valve and safety valve should be blocked.But if backfire occurs due to unusual situation or strong impact, it can not be blocked in the first flashback prevention device. Backfire can be completely eliminated and discharged by a removal system (backfire sensor, multiple solenoid valves, air compressors), improving the reliability of flashback prevention.

    When the gas is not used, the gas discharge solenoid is opened to completely discharge the gas remaining in the gas pipe, thereby preventing inadvertent safety accidents.

    According to the present invention as described above, by installing a flashback arrestor consisting of a double flame removing material and a separate check valve and a safety valve to prevent the backflow of the gas flame, and secondly apply a flashback removal system By extinguishing, blocking, and releasing backfired flames and gases, it completely removes the flames and gases remaining in the pipes, which not only safely and reliably protects Brown's Gas generators or other gas storage tanks, but also prevents workers' safety accidents. have. In addition, the current flashback arrestor is limited to only a portion of the gas, but the flashback prevention and backfire system of the present invention can be widely applied to Brown's Gas generators or other gases, thereby obtaining safety and stabilization of gas use.

Claims (1)

    A cylindrical flashback arrestor body formed at one end thereof with an inlet for gas, and at another end thereof with an outlet for gas;     A predetermined space is formed at a predetermined distance from the inlet side inner wall of the flashback arrestor body, and the first diaphragm having a plurality of gas holes formed at predetermined intervals along a circumference with a predetermined distance from the center and a predetermined distance with the first membrane. A second diaphragm formed in the center of the body and having a gas hole at a central portion thereof;     A cylindrical first flame removing material installed at a center between the first diaphragm and the second diaphragm with a diameter smaller than the inner diameter of the body to form a predetermined space, and not allowing a backfired flame to pass but a gas to pass therethrough;     In the center between the second diaphragm and the flame arrester gas outlet body cover is installed with a diameter smaller than the inner diameter of the body to form a predetermined space, the second flame removing member of the cylindrical which passes the gas without passing the flame to be backfired Flame arrestor of a double structure, characterized in that it is included. [Claim 2]     The method of claim 1,    A check valve for preventing a backflow of backfired gas or flame is separately formed at one inlet of the flashback arrestor, and a safety valve for discharging backfired gas or flame is separately formed at one outlet of the flashback arrestor. Flashback Arrestor. [Claim 3]     The method of claim 1,    A flashback detection sensor on one side of the outlet of the flashback arrestor which senses at least one or more of the temperature, brightness and pressure of the flame to be backfired and transmits an electrical signal to a control box or a plurality of solenoid valves and Brown's Gas generator or other gas storage tank;    A plurality of solenoid valves operating in response to this flashback detection signal, i.e. gas shutoff solenoids and air to block back flow of backfired gas or flames and to prevent the supply of gas from Brown's Gas generators or other gas storage tanks. An air supply solenoid for blowing compressed air of the compressor, and a gas discharge solenoid for discharging the gas remaining in the gas pipe;    A control box for controlling the supply and flow of the solenoid valve and gas in response to a sensor signal;    Flashback removal system comprising an air compressor for supplying compressed air. [Claim 4]    In case of ignition, the gas supply solenoid valve is opened, the air supply solenoid valve is closed, and the gas is supplied to the gas torch or cutter tip with the gas discharge solenoid valve closed. The gas supply solenoid valve is closed to shut off the gas supply, and the air supply solenoid valve is opened to eject compressed air to extinguish the backfire flame remaining in the flashback arrestor and push the residual gas to the torch or cutter tip. And a gas discharge solenoid valve is opened to discharge the gas remaining in the gas supply pipe.

Images