CN101941109B

CN101941109B - Small-sized portable air brazing welding gun

Info

Publication number: CN101941109B
Application number: CN2010102726931A
Authority: CN
Inventors: 蒋海翔
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-08-31
Filing date: 2010-08-31
Publication date: 2012-02-15
Anticipated expiration: 2030-08-31
Also published as: CN101941109A

Abstract

The invention discloses a small-sized portable air brazing welding gun. Air inlets which are communicated are formed on an air mixer, an adjusting valve component is formed by connecting an adjusting hand wheel, a shaft and nuts by screws and is matched with a reducing spring in a spring base, the spring base is arranged in a round nut, and the round and adjusting nuts are connected to the inner wall of a shell of a reducing valve; and a filter I is arranged in a thimble of an air bottle, a filter II and an air needle spring are arranged in an air needle base, a steel needle is also fixed on an air needle with an air needle sealing gasket, one end face of a disc-shaped bowl contacts the steel needle, and the other end of the disc-shaped bowl is matched and assembled with a sealing gasket which is tightly adhered to the spring base. The small-sized portable air brazing welding gun has the advantages that: the complete separation of liquid and air-phase gas is realized by setting two stages of filters, and combustible liquid-phase components cannot enter a gas channel, so that the phenomena of incomplete combustion and red flame are radically prevented; the reducing valve component has the dual functions of pressure adjustment and backfire prevention and can automatically close a flow channel of a gas bottle in case of backfire, so that hazard safety accidents caused by backfire are radically avoided and the safety of the gas bottle is guaranteed at the same time; and the small-sized portable air brazing welding gun is easy to operate, wide in application range, comfortable in handfeel and portable.

Description

Small portable gas soldering welding gun

Technical field

The present invention relates to a kind of welding gun, particularly a kind of small portable gas soldering welding gun that is used for multiple non-ferrous metal tubing or is directed against maintenance sites parts repairing use.

Background technology

Gas soldering solder technology and welding gun are widely used, especially in chemical industry, refrigeration, household electrical appliance industry at present; Portable gas soldering welding gun is used for the field maintenance service, because of its volume is little, does not need combustion-supporting gas cylinder; Be easy to carry; The solder joint firepower is concentrated, and is easy to operate, makes the portable gas soldering welding gun of this type miniaturization receive numerous users' favor.

The patent No. 90222738.6 " portable gun welder " is though also provide a kind of flame that makes to be sharp type ejection; And make flame temperature reach 1600 ℃ portable small-sized welding gun; But because of its no gas pressure adjusting device, also do not have automatic ignition device, the scope of application is restricted and operates also inconvenient; Can not satisfy user's requirement, practicality is not good enough.

Number of patent application 200910090093.0 " combined mechanical pressure release anti-backfire device ", what provide only is to use the parts " backfire controller " on the gas welding welding gun.

Summary of the invention

Technical problem to be solved by this invention is: a kind of small portable gas soldering welding gun is provided, and it is multiple functional, and stable performance is easy to operate, and is safe and practical, and comfortable feel is easy to carry.

The present invention addresses the above problem the technical scheme that is adopted: small portable gas soldering welding gun; Be connected with an end of bend pipe by being installed in the air mixer that has nozzle, jet pipe in the gun barrel; And be connected together on the housing with igniter, the bend pipe other end of the anti-seal of divulging a secret of band is connected in aggregates with pressure-reducing valve assembly, valve assembly; The air admission hole that the through hole formation that communicates with ambient atmosphere is arranged on the described air mixer; Said valve assembly connects into integral body by screw with adjusting handle, regulating shaft, adjusting nut, cooperates with relief spring in the spring base, and spring base is installed in the round nut, and round nut, adjusting nut are connected on the inwall of pressure-reducing valve housing; Said pressure-reducing valve assembly is made up of the gas cylinder thimble in the pressure-reducing valve housing, air tube seat, dish bowl; Mounting filtering device I in the gas cylinder thimble wherein; Also be fixed with draw point on the air tube of mounting filtering device II and air tube spring, band air tube sealing gasket in the air tube seat; Said draw point contacts with an end face of dish bowl, and the other end of dish bowl cooperates composition with the sealing gasket of being close to spring base.

Compared with prior art; The invention has the advantages that: 1, because of in the pressure-reducing valve assembly, being provided with two-stage filter; Utilize the density contrast between liquid, gas; Realize the abundant separation of liquid, gas phase combustion gas, make flammable liquid phase component can not get into gas passage, fundamentally solved because of flammable liquid phase component and gaseous component and be mixed into the flourishing phenomenon of the insufficient appearance of the burning that causes the combustion zone; The pressure-reducing valve assembly has the dual-use function of regulating pressure and preventing tempering in addition, has stopped operating personnel's the feared state of mind;

2, in air Mixture; Four air admission holes that communicate with ambient atmosphere are greatly arranged; Combustible gas and air are fully mixed, the oxygen of capacity is provided, can also when tempering takes place contingency, discharge timely and effectively the pressure in the gun barrel; Be to realize anti-backfire the first line of defence, discharged most energy.Even it is inner that few portion gas pressure gets into pressure-reducing valve from nozzle; Pressure-reducing valve promotes the dish bowl according to gas pressure change; Also can close the circulation passage of gas cylinder automatically, fundamentally stop, also guarantee the safety of gas cylinder simultaneously because of the contingent security incident of tempering;

3, also be provided with the swingfire device of spiral flute profile in the torch head, flame through the swingfire device produced rotate in the same way and concentrate the utilization that has improved heat energy;

4, because of welding gun will use in high-altitude and small space, this torch head can be done comprehensive 360 ° rotation and rotate, and greatly facilitates and satisfied operator's different demands, and is easy to use, laborsaving; In addition its housing grip comfortable, good hand touch, and volume is little, in light weight, portable.

Description of drawings

Fig. 1, structural representation of the present invention (cutaway view).

Fig. 2, pressure-reducing valve assembly of the present invention, valve assembly structure enlarged drawing (valve is opened fully, and combustion gas is maximum through amount).

Fig. 3, pressure-reducing valve assembly of the present invention, valve assembly structure enlarged drawing (anti-backfire process sketch map).Dotted line dish bowl is the normal condition position, the position when solid line dish bowl gets into for the tempering air-flow is arranged.

The specific embodiment

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

It is 120 ° through hole that four chamferings that are uniformly distributed with are arranged on the peripheries in the middle of the air mixer 8, and through-hole diameter is Φ 5～Φ 6mm and communicates that through hole is that air admission hole 8-1 communicates with the external world, makes outside air smooth and easy entering of ability and combustion gas mixing.

Air mixer 8 has in the middle of axially through hole, an end opening, other end bottom surface that the nozzles 7 of spray-hole are arranged, in the shoulder hole of air mixer 8 one ends that have sealing ring of packing into.

There is through hole the centre, and the two ends through hole be tubaeform be convenient to air and combustion gas into and out of jet pipe 10, utilize external screw thread and an end of gun barrel 14 and air mixer 8 on it to fix respectively.

The ignition lead 11 of igniter 9 is installed on the igniting seat 13 of gun barrel 14 inwalls, on the inwall of gun barrel 14 1 ends, is fixing 5 spiral fluted swingfire devices 15, but thereby pilot flame rotates the purpose that reaches that firepower is concentrated and produce high temperature at a high speed.

Gun barrel 14, igniter 9 are installed in by the two halves shell and are screwed in the housing 12 that integral body constitutes, and spacing fixing by the positioning bar on housing 12 inwalls.

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; Fixing and locking back-up ring 1-6 in the peripheral groove of regulating shaft lower end, packing ring 1-7 are spacing; The end of relief spring 1-8 is enclosed within on the regulating shaft 1-2, and the other end is placed on the spring base 1-10, and spring base is placed in the intermediate throughholes of round nut 1-9; Round nut 1-9, adjusting nut 1-5 constitute valve assembly 1 with being threaded on the right cavity wall of pressure-reducing valve housing 4-1, and be as shown in Figure 2.

Pressure-reducing valve housing 4-1 is the ladder cylinder, is divided into left and right two chambeies, also has a threaded counterbore on the sidewall of left chamber, and locking nut 2 usefulness screw threads are fixed in the counterbore; Liquefied gas bottle 6 (seeing accompanying drawing 1) is fixed on the port in left chamber with screw thread; One end of gas cylinder thimble 3 contacts with liquefied gas bottle 6; The other end compresses behind the sealing ring 4-9 with screw thread and is fixed in the middle of the left chamber; Filter I 3-1 is installed in gas cylinder thimble 3 chambeies forms first spray chamber, in the air tube seat in chamber, a pressure-reducing valve housing 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 of a Φ 1mm and with sealing gasket 4-5 is connected on the air tube; The end face of butterfly bowl 4-3 is gone up fixing draw point 4-61 with air tube 4-6 and is contacted, and the other end contacts with sealing gasket 4-2, and the pore that the other end of draw point passes on the air tube seat 4-4 reaches in the air tube 4-6 fixing.

One end of bend pipe 5 is fixed on the inner bolt hole place of air mixer 8 (seeing accompanying drawing 1) with screw thread, and the other end is connected with locking nut 2 on the pressure-reducing valve housing 4-1, and the anti-seal 2-1 that divulges a secret is arranged.

Gas cylinder 6 is with after welding gun is connected during use, and the gas cylinder thimble 3 of pressure-reducing valve assembly tail end backs down the air valve on the gas cylinder 6, and through filter I 3-1 (seeing accompanying drawing 2), this moment is bigger because of the proportion and the density of liquid gas by the welding gun afterbody in combustion gas; Can not pass through filter I smoothly, through filter II 4-8 (seeing accompanying drawing 2), liquid combustion gas thoroughly is blocked again; Only allow the micel below 30～40 μ m to pass through, ventilation rate >=40%, have only the gaseous state combustion gas through and make stable gas pressure; Under the compressing of dish bowl 4-3, air tube spring 4-7 (seeing accompanying drawing 2) is compressed, and air tube seat 4-4 is backed down; Fuel gas is very swimmingly through the air tube seat, and rotatable handgrip 1-1 regulates the pressure of relief spring 1-8 (seeing accompanying drawing 2), with the position that changes dish bowl 4-3; Regulate the size of combustion gas through amount, combustion gas gets into bend pipe 5, in air mixer 8 (seeing accompanying drawing 1), from air admission hole 8-1, introduces air and mixes; When combustion gas when nozzle 7 gets into swingfire devices 15 places, press sincere button igniter 9 work, produce high tension spark at swingfire device 15 places and light combustion gas; Before the swingfire device, fuel gas is ignited, the fuel gas of being lighted has ejector action to air, attracts outside air to get into air mixer 8 and reaches combustion-supporting purpose; Under the effect of swingfire device, make the flame rotation and concentrate ejection, moment can reach welding temperature 1300 degree; Turn adjusting handle 1-1 can control gas flow, the control flame size, 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; Because of 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 14, and this is anti-backfire the first line of defence.

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

Gun barrel 14 can be done 360 ° of omnibearing rotations around locking nut 2, and has the anti-packing 2-1 that divulges a secret of dual rotation to guarantee that the gun barrel rotation can not make gas leakage, satisfies user's different needs, is convenient to processing use on diverse location.(seeing accompanying drawing 1)

After welding gun used, rotation adjusting handwheel 1-1 closed valve assembly 1, thoroughly cut off blast tube after, gas cylinder 6 is screwed off, make gas cylinder thimble 3 break away from gas cylinders 6, the cylinder valve on the gas cylinder 6 is closed automatically.

Claims

1. small portable gas soldering welding gun; Be connected with an end of bend pipe (5) by being installed in the air mixer (8) that has nozzle (7), jet pipe (10) in the gun barrel (14); And and igniter (9) be connected together on the housing (12), bend pipe (5) other end of anti-seal (2-1) that divulge a secret of band is connected in aggregates with pressure-reducing valve assembly (4), valve assembly (1); It is characterized in that having on the described air mixer (8) air admission hole (8-1) of the through hole formation that communicates with ambient atmosphere; Said valve assembly (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 connected on the inwall of pressure-reducing valve housing (4-1); Said pressure-reducing valve assembly (4) is made up of the gas cylinder thimble (3) in the pressure-reducing valve housing (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) is gone up fixedly draw point (4-61); And said draw point contact with an end face of dish bowl (4-3), and the other end of dish bowl (4-3) cooperates composition with the sealing gasket of being close to spring base (1-10) (4-2).

2. small portable gas soldering welding gun according to claim 1 is characterized in that the pressure-reducing valve housing (4-1) of said pressure-reducing valve assembly (4) is divided into left and right two chambeies, on the sidewall of left chamber threaded counterbore is arranged, and locking nut (2) is connected in the counterbore.

3. small portable gas soldering welding gun according to claim 1; It is characterized in that said dish bowl (4-3) end face contacts with sealing gasket (4-2); The other end is gone up fixing draw point (4-61) with air tube (4-6) and is contacted; The other end of draw point (4-61) passes pore on the air tube seat (4-4) and reaches in the air tube (4-6) fixingly, and air tube sealing gasket (4-5) also is installed on the air tube (4-6).

4. small portable gas soldering welding gun according to claim 1; It is characterized in that on the periphery four chamferings that are uniformly distributed with being arranged in the middle of the said air mixer (8) is that 120 ° of through holes are air admission hole (8-1), between said air mixer (8) and gun barrel (14) also with the jet pipe that has been threaded (10).

5. small portable gas soldering welding gun according to claim 1 is characterized in that the ignition lead (11) of said igniter (9) is installed on the igniting seat (13) of gun barrel (14) inwall.

6. small portable gas soldering welding gun according to claim 1 is characterized in that fixing 5 spiral fluted swingfire devices (15) on said gun barrel (14) mouthful inwall of holding.