CN101941108B

CN101941108B - Portable gas brazing welding gun

Info

Publication number: CN101941108B
Application number: CN2010102726912A
Authority: CN
Inventors: 蒋海翔
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-08-31
Filing date: 2010-08-31
Publication date: 2012-11-21
Anticipated expiration: 2030-08-31
Also published as: CN101941108A

Abstract

The invention discloses a portable gas brazing welding gun. A valve core, an adjusting valve and one end of an air mixer are mounted on an adjusting valve body; one end of a casing is connected with a gun barrel through a gun barrel assembly, and a switch lock matched with a propping button which is connected with an ignitor is mounted on the side wall of the casing; the propping button is matched with the valve core; a pressure reducing valve consists of a filter I in a gas cylinder thimble on a pressure reducing valve body, as well as a filter II, a gas needle spring and a gas needle upper fixing steel needle with a gas needle sealing pad, which are mounted in a gas needle seat; one end surface of a dishing bowl is contacted with the steel needle while the other end surface thereof is matched with the sealing pad and a gas channel seat; and the gas channel seat is connected with the adjusting valve body into a whole through a gas pipe. A two-stage filter is arranged on the pressure reducing valve so that the problem on the appearance of red fire caused by inadequate combustion is radically solved. The pressure reducing valve can be used for adjusting the pressure as well as preventing the backfire, thereby radically stopping the safety accidents caused by the backfire. A switch lock is mounted; when not working, the switch lock is in a safe state to prevent false operations; and when working, the switch lock is loosened so that the fuel gas can pass through the switch lock even if is in a locked state. The welding gun is convenient to use, labor-saving, safe, light in weight and easy to carry.

Description

Portable gas soldering welding gun

Technical field

The present invention relates to a kind of welding gun, particularly a kind of 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. 00254374.5 " gas spray welding gun safety switch " is though also provide a kind of child of preventing to play or stacked collision, misoperation and the danger of opening arc welding gun switch; Guarantee safe in utilization; But its structure is complicated; Will make some protrusion clamping blocks at the periphery of button ignition switch, be provided with the start groove in the position of the corresponding protrusion of welding gun inner walls clamping block, configuration has the spring of axial thrust and rotary torsion; Before button ignition switch is depressed and lights a fire, need earlier button ignition switch is rotated in the straight trough of relative start groove.

Number of patent application 200910090093.0 combined mechanical pressure release anti-backfire devices, 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 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: portable gas soldering welding gun comprises gun barrel, an end of pressure-reducing valve, control valve, igniter and air mixer and barrel assembly is installed in the housing that forward and backward half shell is formed; Said control valve by the spool that is connected with adjusting handle, pressure cap with regulate valve casing, constitute cooperating of valve seat; Be connected with valve inside on the regulation valve body of said control valve; The air inlet of control valve is connected with valve inside through pneumatic duct, and the gas outlet is connected with an end of air mixer through air flue; An end that also connects air mixer on the regulation valve body; Said pressure-reducing valve is by fixing draw point on the filter I in the gas cylinder thimble on the reducing valve body, the air tube of filter II, air tube spring, band air tube sealing gasket in the air tube seat; Said draw point contacts with an end face of dish bowl; The other end of dish bowl cooperates with sealing gasket, air flue seat, and axial flow passage on the reducing valve body and air flue seat overdraught passage communicate, and air flue seat and regulation valve body connect into integral body with tracheae; Also be connected with switch lock on the said housing and cooperate with the sincere button that is connected with igniter, said sincere button cooperates with described valve inside again.

Compared with prior art; The invention has the advantages that: 1, because of in pressure-reducing valve, 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 are mixed into the flourishing phenomenon of the insufficient appearance of the burning that causes the combustion zone, guaranteed the security of welding gun operation; Pressure-reducing valve has the pressure of adjusting and prevents that the dual-use function of tempering is safe in utilization in addition, has stopped operating personnel's the feared state of mind;

2, in air Mixture, four air admission holes that communicate are more greatly arranged, combustible gas and air are fully mixed, the oxygen of capacity also is provided for gas fuel burning; Can the pressure in the gun barrel be discharged timely and effectively again just in case tempering takes place, 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 changes promotion dish bowl according to pressure; Also can close the circulation passage of gas cylinder gas 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, also increase on this welding gun switch lock is housed; Switch lock is in safety position and can prevents that switch misoperation ejection thermal-flame from causing the injury to personnel and equipment when not working; Can unclamp hand during work again and make it under lock-out state, can guarantee that still combustion gas is through making the welding gun operate as normal; When tempering takes place, also can in time close switch lock, stop tempering to get into pressure-reducing valve, the multiple defence line safety effect is arranged; Easy to use, laborsaving, safety; 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 enlarged drawing of the present invention (operate as normal schematic diagram).

Fig. 3, pressure-reducing valve enlarged drawing of the present invention (anti-backfire fundamental diagram).

Fig. 4, control valve enlarged drawing of the present invention.

Fig. 5, switch lock working state schematic representation a, disarm state, b, lock-out state, c, safety position.

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 4; Through-hole diameter is Φ 5～Φ 6mm and connects each other; Through hole is air admission hole 4-1, and an end place that is arranged on shell 11 communicates with the external world, makes outside air smooth and easy entering of ability and combustion gas mixing.

There is through hole the centre, an end opening, and there is the nozzle 4-2 of spray-hole other end bottom surface, is installed in screw thread in the end through hole of the air mixer 4 that has sealing ring, and an end of air mixer 4 is packed in the screwed hole of regulation valve body 5-1 right-hand member, and is provided with multi-sealed.

In the middle of the other end of air mixer 4 for horn mouth be convenient to air and combustion gas into and out of; Extend in the end of gun barrel 2; And at the coil holder 3-1 of the oblique through wires hole of outer surface middle connecting band, and air mixer 4 is fixed into integral body with coil holder 3-1 with the barrel assembly 3 that is threaded of housing 11 ports.

On the inwall of gun barrel 2 ports of export, be fixed with spiral fluted swingfire device 1, but thereby pilot flame rotates the purpose that reaches that firepower is concentrated and produce high temperature at a high speed.

The reducing valve body 12-4 of pressure-reducing valve 12 is a cylinder, is divided into left and right two chambeies, and liquefied gas bottle is fixed on the port in left chamber with screw thread, and an end of gas cylinder thimble 13 contacts with liquefied gas bottle, and the other end compresses sealing ring 13-2 and is fixed in the left chamber with screw thread; Filter I 13-1 is installed in gas cylinder thimble 13 chambeies forms first spray chamber; In the air tube seat 12-6 in chamber, a reducing valve body 12-4 left side filter II 12-1 is installed successively and forms second spray chamber, air tube spring 12-2; The air tube 12-3 of band air tube sealing gasket 12-5; Be connected on the air tube stainless steel draw point 12-31 of a Φ 1mm, the pore that draw point one end passes on the air tube seat 12-6 reaches in the air tube 12-3 fixing.

On dish bowl 12-7 one end face and the air tube fixedly the other end of draw point 12-31 contact, dish-shaped bowl other end contacts with sealing gasket 12-10.

Pressure-reducing valve connects dish bowl seat 12-9, sealing gasket 12-10 in the right chamber successively, and a dish bowl 12-7 edge cooperates with dish bowl seat 12-9, adjusts pad 10-2, compression spring 10-3 and spring base 10-1 and is installed in the cavity of air flue seat 10 1 ends.

The other end of air flue seat 10 extends to outside the right chamber of reducing valve body 12-4, connects an end of tracheae 9 with 0 shape sealing ring, flat shim, nut at port inner wall; Dish bowl seat 12-9, air flue seat 10 usefulness screw threads are fixed on the inwall in the right chamber of reducing valve body 12-4; There is an axial flow passage 12-11 gas channel 10-4 on right cavity wall of reducing valve body and air flue seat 10 sidewalls and the steam vent 12-8 corresponding section on the dish bowl seat 12-9 sidewall, and be as shown in Figure 2.

Control valve by the spool that is connected with adjusting handle, pressure cap with regulate valve casing, valve seat and cooperate and constitute.

Use the other end of the tracheae 9 that is threaded in the left end counterbore of the regulation valve body 5-1 of control valve 5, and with 0 shape sealing ring, flat shim, nut seal.

The core print seat 5-9 that connects valve inside spring 5-10, valve inside 5-8 from top to bottom successively and be threaded in the shoulder hole of regulation valve body 5-1 lower end with regulation valve body; There is air admission hole 5-81 the upper end of valve inside 5-8, and there is venthole 5-82 the lower end, and end has thimble 5-83, and thimble can upper and lowerly move in core print seat 5-9.

The interior valve casing 5-5 that regulates with being threaded of regulation valve body upper end blind hole; Regulate valve casing 5-5 again with the spool 5-4 of band adjusting handle 5-2 with being threaded; Pressure cap 5-3 is with the upper end that is threaded in valve casing 5-5; Spool 5-4 can not be pulled out from valve casing, and the air inlet in the middle of the needle 5-41 of spool 5-4 lower end and the valve seat 5-6 cooperates, and inlet channel is communicated or closes.Air inlet communicates with pneumatic duct 5-7 again.

In the regulation valve body right-hand member blind hole with an end of the air mixer 4 of matched in clearance connecting band nozzle 4-2 and barrel assembly 3, an end of the other end insertion gun barrel 2 of air mixer, as shown in Figure 1.

Between air flue seat 10 on the pressure-reducing valve 12 and regulation valve body 5-1 with tracheae 9 usefulness 0 shape sealing ring, flat shim, nut seal and link into an integrated entity; Gas outlet 5-82 on the valve inside communicates with pneumatic duct 5-7 on the regulation valve body 5-1; The air flue 5-11 of gas outlet 5-51 on regulation valve body on the adjusting valve casing communicates with the nozzle 4-2 in the air mixer; And be installed in respectively by the two halves shell with the sincere button 7 that is connected with igniter 8 and connect in whole housing 11 chambeies with screw; Switch lock 6 also is installed in the breach of housing 11 lower wall; Locking bar 6-4 on the switch lock 6 cooperates with sincere button 7, and is as shown in Figure 1.

Switch lock 6 is made up of lock shell 6-1, locking bar 6-4 and spring 6-2.Spring 6-2 is installed on the locking bar 6-4, and an end of spring is spacing with baffle plate 6-3, and an end of locking bar has in the lock shell 6-1 of shoulder hole in the middle of inserting.

The course of work of switch lock is: when switch lock 6 is in safety position, shown in Fig. 5 C, because the restriction of locking bar 6-4, sincere button 7 can't move upward, and gas circuit and ignition system all can't be opened, and system is in guard mode; When along or during counterclockwise with switch lock 6 half-twists, because of the rotation of locking bar 6-4, sincere button 7 is disengaged restriction, can move upward, accomplish the teamwork of ventilation and igniting smoothly, shown in Fig. 5 A; After accomplishing igniting, discharge sincere button 7, because locking bar 6-4 travels forward, stop that sincere button 7 returns under the effect of bar spring, system is in the lock state, and promptly unclamps hand switch lock 6 and still is in duty, makes blast tube continue to keep unimpeded, shown in Fig. 5 B.

During use; Gas cylinder is connected back (figure draw) with welding gun, welding gun pressure-reducing valve afterbody gas cylinder thimble 3 backs down the gas cylinder air valve, liquid state or gaseous state combustion gas by the welding gun afterbody through filter I 13-1; This moment is because the proportion and the density of liquid gas are bigger; Can not pass through filter I swimmingly, liquid combustion gas thoroughly stopped through filter II 12-1, have only the gaseous state combustion gas through and make stable gas pressure.This moment, Unscrew valve switch lock 6, pressed sincere button 7, and sincere button 7 upwards promotes and drive plunger 5-83 to move upward; Valve inside 5-8 on the control valve 5 is moved up, open gas inlet 5-81, make combustion gas get into the valve inside internal channel; The combustion gas entering after gas outlet 5-82, pneumatic duct 5-7 to control valve 5; Rotating regulation valve adjusting handle 5-2 regulates the size of combustion gas through amount, and then reaches the purpose of adjusting, control flame size and welding temperature.Combustion gas gets into barrel assembly 3, in air mixer 4, mixes with the air of introducing, and gets into swingfire device 1 place of gun barrel 2 ports of export; Meanwhile sincere button 7 moves and opens the blast tube except that upwards promoting plunger 5-83, also oppresses piezoelectric ceramic ignitor 8 simultaneously and opens, and starts working; Shown in Fig. 5 A, produce high-voltage spark at swingfire device 1 place, fuel gas ignites; Combustion gas is under the effect of combustion expansion pressure; Through set swingfire device 1 in the gun barrel 2, make the flame rotation and concentrate the instantaneous welding temperature that reaches.Rotating switch lock 6 unclamps the sincere button 7 of hand and is locked to Fig. 5 B position forward, and switch lock 6 is in the lock state on sincere button, and 5-8 also opens because of valve inside, and flame does not extinguish still normally circulation of combustion gas.

When causing tempering to take place when external world's generation unpredictable factor; Combustion gas moment refluence, the tempering air velocity is exceedingly fast, but can be with the instantaneous pressure release of most combustion gas at the air admission hole 4-1 at air mixer 4 places; And deaden in the air continuation entering gun barrel 2, this is anti-backfire the first line of defence.

If at this moment rotating switch lock 6 makes valve inside 5-8 be in closed condition, combustion gas also can't reflux and stop tempering, and this is defence line, anti-backfire second road.

Because of various reasons just in case there is indivisible tempering air-flow to get into pressure-reducing valve 12 through nozzle 4-2, because of its pressure greater than the pressure in the welding gun, be enough to overcome the elastic force of relief spring 10-3; Promote dish bowl 12-7 and move right, air tube 12-3 is discharged, under the effect of air tube spring 12-2; Air tube sealing gasket 12-5 moves right with air tube 12-3; Pore on the air tube seat 12-6 is blocked, and the closed gas flow passage cuts off source of the gas, has guaranteed the safety of source of the gas bottle; Fundamentally stopped the generation of tempering accident, as shown in Figure 3.

After welding gun used, rotation adjusting handwheel 5-2 closed control valve 5 and lock releasing switch 6, thoroughly cut off blast tube after, gas cylinder is screwed off, make gas cylinder thimble 13 break away from gas cylinders, the cylinder valve on the gas cylinder is closed automatically.

Claims

1. portable gas soldering welding gun; Comprise gun barrel (2), an end of pressure-reducing valve (12), control valve (5), igniter (8) and air mixer (4) and barrel assembly (3) is installed in the housing (11) that forward and backward half shell is formed, it is characterized in that said control valve (5) cooperates formation by the spool (5-4) that is connected with adjusting handle (5-2), pressure cap (5-3) with adjusting valve casing (5-5), valve seat (5-6); Be connected with valve inside (5-8) on the regulation valve body (5-1) of said control valve (5); The air inlet (5-41) of control valve (5) is connected with valve inside (5-8) through pneumatic duct (5-7); Gas outlet (5-51) is connected with air mixer (4) through air flue (5-11), also connects an end of air mixer (4) on the regulation valve body (5-1); Said pressure-reducing valve is made up of the gas cylinder thimble (13) on the reducing valve body (12-4), air tube seat (12-6); Filter I (13-1) is installed in the said gas cylinder thimble (13); The air tube (12-3) of filter II (12-1), air tube spring (12-2), band air tube sealing gasket (12-5) is installed in the said air tube seat (12-6); Said air tube (12-3) is gone up fixedly draw point (12-31); Said draw point (12-31) contacts with an end face of dish bowl (12-7); The other end of dish bowl (12-7) cooperates with sealing gasket (12-10), air flue seat (10), and axial flow passage (12-11) and air flue seat (10) overdraught passage (10-4) on the reducing valve body (12-4) communicate, and air flue seat (10) links into an integrated entity with tracheae (9) with regulation valve body (5-1); Also being connected with switch lock (6) on the said housing (11) cooperates with the sincere button (7) that is connected with igniter (8); Said sincere button (7) cooperates with described valve inside (5-8) again.

2. portable gas soldering welding gun according to claim 1 is characterized in that on the inwall of said gun barrel (2) port of export that fixing one has 5 spiral fluted swingfire devices (1).

3. portable gas soldering welding gun according to claim 1 is characterized in that the barrel assembly that is threaded (3) of said housing (11) port is fixed into integral body with air mixer (4) and coil holder (3-1).

4. portable gas soldering welding gun according to claim 1; It is characterized in that said reducing valve body (12-4) is divided into left and right two chambeies; In the right chamber dish bowl seat (12-9), sealing gasket (12-10) are installed; The reducing valve body air flue seat (10) that is threaded has steam vent (12-8) to communicate with gas channel (10-4) on air flue seat (10) sidewall on dish bowl seat (12-9) sidewall, also with the right cavity wall of pressure-reducing valve on corresponding axial flow passage (12-11) communicate; Dish bowl (12-7) edge cooperates with dish bowl seat (12-9), and adjustment pad (10-2), compression spring (10-3), spring base (10-1) are installed in the cavity of said air flue seat (10) end.

5. portable gas soldering welding gun according to claim 1; The interior switch lock (6) of installing of breach that it is characterized in that said housing (11) lower wall; Switch lock (6) is made up of locking bar (6-4), baffle plate (6-3), spring (6-2), lock shell (6-1); Baffle plate (6-3), spring (6-2) are installed on the said locking bar (6-4), and have in the lock shell (6-1) of shoulder hole in the middle of the insertion of an end of locking bar (6-4), an end of spring (6-2) is spacing with baffle plate (6-3).

6. portable gas soldering welding gun according to claim 1; It is characterized in that the core print seat (5-9) that connects valve inside spring (5-10), valve inside (5-8) from top to bottom successively and be threaded in the ladder blind hole of said regulation valve body (5-1) lower end with regulation valve body (5-1); There is air admission hole (5-81) the valve inside upper end; There is venthole (5-82) lower end, and end has thimble (5-83), and thimble is upper and lower moving in core print seat (5-9).