CN101954520B

CN101954520B - Multifunctional valve of welding gun

Info

Publication number: CN101954520B
Application number: CN2010102726804A
Authority: CN
Inventors: 蒋海翔
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-08-31
Filing date: 2010-08-31
Publication date: 2012-07-25
Anticipated expiration: 2030-08-31
Also published as: CN101954520A

Abstract

The invention discloses a multifunctional valve of a welding gun, comprising an adjusting valve and a pressure reducing valve which are arranged on a valve body. The adjusting valve is an integral formed by connecting an adjusting hand wheel, an adjusting shaft and an adjusting nut by screws and is matched with a pressure reducing spring in a spring seat arranged in a round nut, and the round nut and the adjusting nut are connected on the inner wall of the valve body; and the pressure reducing valve is composed of a gas cylinder thimble inside the valve body, a gas thimble seat and a phialiform bowl, the gas cylinder thimble is internally provided with a filter I, the gas thimble is internally provided with a filer II, a gas thimble spring, a gas thimble provided with a gas thimble sealing gasket, and a steel needle, one end face of the phialiform bowl is in contact with the gas thimble, and the other end face of the phialiform is matched with the sealing gasket appressed to the spring seat. The invention fundamentally solves the problem on the phenomenon of red fire due to insufficient combustion caused by mixed admission of combustible fluid and gaseous phase components, once the red fire occurs, the pressure reducing valve can be used for automatically closing a gas cylinder circulating channel by pushing the phialiform according to the change of gas pressure, thereby fundamentally eradicating safety accidents caused by red fire and guaranteeing the gas cylinder safety; the functions of pressure reduction and back fire are both realized by the pressure reducing valve; and the invention has the advantages of simple structure, small size and light weight.

Description

The welding gun multifunction valve

Technical field

The present invention relates to the important critical component on a kind of welding gun, particularly a kind of gas flow size, pressure to the entering welding gun is regulated, is reduced pressure, and also has the welding gun multifunction valve of fire-proof function.

Background technology

The function of existing welding gun is more single, and its switch only can be used for regulating the size of gas quantity, guarantees the stable of flame, can not satisfy user's many-side especially in the demand of secure context.

The patent No. 200620058682.5 " fireproof tempering device " is only applicable in the fuel gas supply conduit of equipment such as industrial welding gun, gas furnace, and the device that backfire or tempering are used takes place in transmission course.

The patent No. 94226670.6 " Gas welding torch " also provides a kind of Gas welding torch that fireproof tempering device is housed before valve body, fireproof tempering device is made up of fire-stopping pipe and fire-stopping pipe seat, and the valve front end that is contained in the mid-section body is fixed by connector.

Number of patent application 200910090093.0 " combined mechanical pressure release anti-backfire device " provides only is to use a parts backfire controller on the gas welding welding gun, its complex structure, and also needing increases and its matching used mechanical pressure release valve in addition.

Above-mentioned each patent function singleness only can not have other function by anti-backfire, and the fireproof tempering device volume is big, occupy the very large space of welding gun.

Summary of the invention

Technical problem to be solved by this invention is: a kind of welding gun multifunction valve is provided, and it is simple in structure, compact, volume is little, has multinomial function, can satisfy user's different demands, and is easy to operate, safe in utilization.

The present invention addresses the above problem the technical scheme that is adopted: the welding gun multifunction valve; Comprise the pressure-reducing valve and the control valve that are installed on the valve body; Said control valve connects into integral body by screw with adjusting handle, regulating shaft, adjusting nut; Cooperate with the relief spring in the spring base, spring base is installed in the round nut, and round nut, adjusting nut are with being threaded on the inwall of valve body; Said pressure-reducing valve is made up of the gas cylinder thimble in the valve body, air tube seat, dish bowl, and mounting filtering device I in the gas cylinder thimble wherein, is with the air tube of air tube sealing gasket at mounting filtering device II and air tube spring in the air tube seat; Also be fixed with draw point on the air tube, said draw point contacts with an end face of dish bowl, and the other end of dish bowl cooperates with the sealing gasket of being close to spring base.

Compared with prior art, the invention has the advantages that: gas cylinder thimble, air tube seat in pressure-reducing valve take little space; Be provided with two-stage filter; Utilize the density contrast between liquid, gas phase; Realize the abundant separation of liquid, gas phase combustion gas; Make flammable liquid phase component can not get into gas passage, fundamentally solved, cause the insufficient and flourishing phenomenon that causes of burning because of flammable liquid phase component and gaseous component are mixed into the combustion zone; In abnormal condition contingency tempering takes place simultaneously; Pressure-reducing valve can promote the dish bowl according to gas pressure change again; Automatically close the circulation passage of combustion gas in the welding gun; Fundamentally stopped the security incident that possibly cause, also guaranteed the safety of gas cylinder, stopped operating personnel's the feared state of mind because of tempering.And decompression and function of preventing back-fire accomplish by same mechanism pressure-reducing valve, not adding under the situation of other parts, has dual-use function, so it is simple in structure, volume is little, in light weight.Also connecting the welding gun gun barrel on this valve body, with the sealing of two-stage sealing ring, nut check can make the welding gun gun barrel in 360 degree scopes, rotate, and greatly makes things convenient for and satisfied operator's different operating demand.

Description of drawings

Fig. 1, structural representation of the present invention.

Fig. 2, user mode reference diagram of the present invention (normal operating conditions).

Fig. 3, user mode reference diagram of the present invention (state when tempering takes place).

The specific embodiment

Below in conjunction with accompanying drawing embodiments of the invention are further described.

Control valve 1 is made up of adjusting handle 1-1, regulating shaft 1-2, adjusting nut 1-5, relief spring 1-8, round nut 1-9 etc.

Fixedly be threaded, be equipped with the regulating shaft 1-2 of seal washer 1-4 on the inwall of adjusting handle 1-1 with screw 1-3, regulating shaft 1-2 links into an integrated entity with screw thread and adjusting nut 1-5, and spacing with the circlip 1-6 that installs in the escape on the regulating shaft; The end of relief spring 1-8 is enclosed within on the regulating shaft 1-2, and 1-7 is spacing with packing ring, and the other end is placed in the spring base 1-10; Spring base is placed in the intermediate throughholes of round nut 1-9; Round nut 1-9 is with being threaded on the right cavity wall of valve body 4-1, and compress gasket and sealing gasket 4-2, and is as shown in Figure 2.

Pressure-reducing valve 4 is made up of the gas cylinder thimble 3 in the valve body, air tube seat 4-4, dish bowl 4-3, relief spring 1-8 etc.

Valve body 4-1 is the ladder cylinder, is divided into left and right two chambeies, and liquefied gas bottle 6 (seeing accompanying drawing 1) is with the port that is threaded in chamber, a valve body 4-1 left side, and with an end in contact of gas cylinder thimble 3, the other end of gas cylinder thimble 3 is with being threaded in the left chamber and compressing sealing ring 4-9; Filter I 3-1 is installed in gas cylinder thimble 3 inner chambers forms first spray chamber; In the air tube seat 4-4 in chamber, a valve body 4-1 left side filter II4-8 is installed successively and forms second spray chamber, air tube spring 4-7; Air tube 4-6; The draw point 4-61 of a Φ 1mm and with air tube sealing gasket 4-5 is connected on the air tube; The pore that draw point 4-61 passes on the air tube seat 4-4 contacts with the end face of butterfly bowl 4-3, and butterfly bowl 4-3 other end contacts with sealing gasket 4-2.

Also have a threaded counterbore on the sidewall of chamber, a relief valve body 4-1 left side, an end of bend pipe 5 nut 2 usefulness that are locked are threaded in the counterbore, and have and prevent divulging a secret seal 2-1.

Gas cylinder 6 is with after welding gun is connected during use, and the gas cylinder thimble 3 of pressure-reducing valve 4 tail ends backs down the air valve on the gas cylinder 6, combustion gas by the welding gun afterbody through filter I 3-1; This moment is bigger because of the proportion and the density of liquid phase combustion gas, can not pass through filter I smoothly, again through filter II 4-8; Liquid combustion gas thoroughly is blocked; Only allow the micel below 30～40 μ m to pass through, also promptly have only the gaseous state combustion gas could through and make stable gas pressure, ventilation rate >=40%.Rotation adjusting handwheel 1-1 increases the pressure of relief spring 1-8, promotes dish bowl 4-3 and is moved to the left, and under the compressing of dish bowl 4-3, air tube spring 4-7 is compressed, and air tube 4-6 is backed down, and fuel gas is very swimmingly through the air tube seat.Rotation adjusting handwheel 1-1 regulates the pressure of relief spring 1-8, to change the position of dish bowl 4-3, reaches the purpose of adjusting combustion gas through the amount size.Combustion gas gets into bend pipe 5, and is as shown in Figure 2, in air mixer 8 (seeing accompanying drawing 1), from air admission hole 8-1, sucks air and mixes; When combustion gas when nozzle 7 gets into swingfire devices 11 places, press sincere button igniter 9 work, produce high-voltage spark at swingfire device 11 places; Before the swingfire device, fuel gas is ignited; Turn adjusting handle 1-1 can control gas flow, the size of control firepower, and then reach the purpose of controlling welding temperature.

When causing tempering to take place when external world's generation unpredictable factor; Combustion gas moment refluence; Although the tempering air velocity is exceedingly fast; But the air admission hole 8-1 that locates at air mixer 8 (seeing accompanying drawing 1) can be with most tempering combustion gas pressure releases, and deaden air and continue to get in the gun barrel 10, and this is anti-backfire the first line of defence.

Just in case the tempering air-flow that fraction arranged gets into pressure-reducing valve through nozzle 7 (seeing accompanying drawing 1), because of its pressure greater than the pressure in the welding gun, will overcome the elastic force of relief spring 1-8 (seeing accompanying drawing 3); Promote dish bowl 4-3 and move right, under the effect of air tube spring 4-7, air tube sealing gasket 4-5 moves right with air tube 4-6; Pore on the air tube seat 4-4 is blocked; The closed gas flow passage cuts off source of the gas, has guaranteed the safety of source of the gas gas cylinder, has fundamentally stopped the generation of tempering accident.

Gun barrel can be done 360 ° of rotations around locking nut 2, and has the dual anti-seal 2-1 that divulges a secret to guarantee can not make gas leakage when gun barrel rotates, and is convenient to the use of on diverse location, working, and satisfies user's demand.(seeing accompanying drawing 1)

After welding gun used, rotation adjusting handwheel 1-1 closed control valve 1, and relief spring 1-8 release sealing gasket 4-2, dish bowl 4-3 are resetted; Air tube 4-6 is under the elastic force of air tube spring 4-7; Close the pore on the air tube seat 4-4, thoroughly cut off blast tube after, gas cylinder 6 is screwed off; Make gas cylinder thimble 3 break away from gas cylinder 6, the cylinder valve on the gas cylinder 6 is closed automatically.

Claims

1. welding gun multifunction valve; Comprise the pressure-reducing valve (4) and the control valve (1) that are installed on the valve body (4-1); It is characterized in that: said control valve (1) connects into integral body by screw (1-3) with adjusting handle (1-1), regulating shaft (1-2), adjusting nut (1-5); Cooperate with the relief spring (1-8) in the spring base (1-10), spring base (1-10) is installed in the round nut (1-9), and round nut (1-9), adjusting nut (1-5) are with being threaded on the inwall of valve body (4-1); Said pressure-reducing valve (4) is made up of the gas cylinder thimble (3) in the valve body (4-1), air tube seat (4-4), dish bowl (4-3); Gas cylinder thimble (3) interior mounting filtering device I (3-1) wherein, the air tube (4-6) of air tube seat (4-4) interior mounting filtering device II (4-8) and air tube spring (4-7), band air tube sealing gasket (4-5); Also be fixed with draw point (4-61) on the air tube (4-6), said draw point (4-61) contacts with an end face of dish bowl (4-3), and the other end of dish bowl cooperates with the sealing gasket of being close to spring base (4-2).

2. welding gun multifunction valve according to claim 1; It is characterized in that said control valve (1) on the inwall of adjusting handle (1-1) with screw (1-3) secured adjusted axle (1-2), on the said regulating shaft (1-2) screw thread is arranged, sealing ring (1-4) also is installed; Regulating shaft (1-2) links into an integrated entity with screw thread and adjusting nut (1-5); And spacing with the circlip of installing in the escape on the regulating shaft (1-6), an end of relief spring (1-8) is enclosed within on the regulating shaft (1-2), and (1-7) is spacing with packing ring; The other end is placed in the spring base (1-10); Spring base is placed in the intermediate throughholes of round nut (1-9), and round nut (1-9) is with being threaded on the right cavity wall of valve body (4-1), and compress gasket and sealing gasket (4-2).

3. welding gun multifunction valve according to claim 1; It is characterized in that said valve body (4-1) is the ladder cylinder; Be divided into left and right two chambeies; Liquefied gas bottle (6) is with the port that is threaded in the left chamber of valve body (4-1), and with an end in contact of gas cylinder thimble (3), the other end of gas cylinder thimble (3) is with being threaded in the left chamber and compressing sealing ring (4-9).

4. welding gun multifunction valve according to claim 1; It is characterized in that said air tube (4-6) is gone up the draw point (4-61) of fixed connection one Φ 1mm and with air tube sealing gasket (4-5), the pore that draw point (4-61) passes on the air tube seat (4-4) contacts with an end face of butterfly bowl (4-3).