CN111215723A

CN111215723A - Flux supply method and flame welding equipment

Info

Publication number: CN111215723A
Application number: CN202010001910.7A
Authority: CN
Inventors: 李生平; 梁宝明; 王明; 何林; 杨海英; 张兆宇
Original assignee: Zhejiang Heli Hydrogen Energy Technology Co ltd
Current assignee: Zhejiang Heli Hydrogen Energy Technology Co ltd
Priority date: 2020-01-02
Filing date: 2020-01-02
Publication date: 2020-06-02
Anticipated expiration: 2040-01-02
Also published as: CN111215723B

Abstract

The application discloses a flux supply method and a flame soldering apparatus. The soldering flux supply method comprises the following steps: s1, feeding fuel gas and liquid soldering flux into the welding gun, and respectively conveying the fuel gas and the liquid soldering flux to the front end of the welding gun; and S2, jetting out fuel gas from a fuel gas outlet at the front end of the welding gun, and jetting out soldering flux from a soldering flux outlet at the front end of the welding gun, so that the fuel gas and the soldering flux are mixed at the front end of the welding gun. The utility model provides a scaling powder is carried to welder's front end with liquid, separates with the gas all the time in its transportation process, and its transfer passage is full of to liquid scaling powder, and outside oxidizing substance is difficult to get into the transfer passage of scaling powder to can avoid the scaling powder to crystallize in the passageway, and then block up the passageway. The flux supply method provided by the application has the advantage of high flux utilization rate.

Description

Flux supply method and flame welding equipment

Technical Field

The application relates to the technical field of welding, in particular to a soldering flux supply method and flame welding equipment.

Background

Flux is usually added during soldering to ensure soldering effect. In patent publication No. 205057255U, a soldering gun capable of supplying both gas and flux is disclosed, which includes a duct for transporting flux, which uses nitrogen gas to carry liquid flux out in the form of droplets to a gun mouth, thereby achieving flux supply.

However, in the conventional flame soldering apparatus, the flux is not highly available, the flux is not easily carried out from the storage tank, and the flux is easily crystallized in the conveying pipe by an oxidizing substance (e.g., water), so that the conveying pipe of the flux is easily blocked.

Disclosure of Invention

An object of the present application is to provide a soldering flux supplying method and a flame soldering apparatus, which solve the problems in the prior art that the utilization rate of the soldering flux is not high and the soldering flux easily blocks the pipeline.

According to an aspect of the present application, there is provided a flux supplying method including the steps of:

s1, feeding fuel gas and liquid soldering flux into the welding gun, and respectively conveying the fuel gas and the liquid soldering flux to the front end of the welding gun;

and S2, ejecting the fuel gas from a fuel gas outlet at the front end of the welding gun, and ejecting the soldering flux from a soldering flux outlet at the front end of the welding gun, so that the fuel gas and the soldering flux are mixed at the front end of the welding gun.

Further, in the step S2, the soldering flux is atomized at the soldering flux outlet and then sprayed forward.

Further, in step S2, the soldering flux is sprayed forward from the middle of the front end of the soldering gun, and the fuel gas is sprayed forward from the periphery of the soldering flux.

Further, in the process that the fuel gas and the soldering flux are conveyed to the welding gun, at least part of the conveying channel of the soldering flux is sleeved in the conveying channel of the fuel gas.

According to another aspect of the present application, there is also provided a flame welding apparatus comprising:

the welding gun comprises a welding gun gas channel and a welding gun scaling powder channel, wherein the rear end of the welding gun gas channel is a welding gun gas inlet, the front end of the welding gun scaling powder channel is a burner gas outlet, the rear end of the welding gun scaling powder channel is a welding gun scaling powder inlet, the front end of the welding gun scaling powder channel is a burner scaling powder outlet, the welding gun gas channel is not communicated with the welding gun scaling powder channel, and the burner gas outlet is close to the burner scaling powder outlet;

the conveying unit comprises a fuel gas conveying channel and a soldering flux conveying channel;

the gas supply unit is suitable for inputting gas into the welding gun gas inlet through the gas conveying channel, so that the gas is sprayed out from the burner gas outlet after passing through the welding gun gas channel; and

and the soldering flux supply unit is suitable for inputting liquid soldering flux into the soldering flux inlet of the welding gun through the soldering flux conveying channel, so that the soldering flux is sprayed out from the nozzle soldering flux outlet after passing through the soldering flux channel of the welding gun.

Further, the soldering flux supply unit comprises a soldering flux storage tank, the flame soldering device further comprises an auxiliary gas supply unit, the auxiliary gas supply unit is suitable for inputting auxiliary gas into the soldering flux storage tank through a first auxiliary gas channel, and the auxiliary gas is used for extruding the liquid soldering flux from the soldering flux storage tank into the soldering flux conveying channel and then conveying the liquid soldering flux to the soldering flux channel of the soldering gun.

Further, at least part of the soldering flux conveying channel is sleeved in the fuel gas conveying channel.

Further, the conveying unit comprises a fuel gas conveying pipe, a soldering flux conveying pipe and a first adapter, the scaling powder conveying pipe is sleeved in the fuel gas conveying pipe, the outer diameter of the scaling powder conveying pipe is smaller than the inner diameter of the fuel gas conveying pipe, whereby the combustion gas is adapted to be delivered in the gap between the flux delivery tube and the combustion gas delivery tube, the soldering flux is suitable for being conveyed in the soldering flux conveying pipe, the first conversion joint is used for enabling a gas supply pipe of the gas supply unit and a soldering flux supply pipe of the soldering flux supply unit which are independent to each other to be respectively communicated with the gas conveying pipe and the soldering flux conveying pipe which are sleeved together, the conveying unit optionally further comprises a second adapter, and the second adapter is used for enabling the gas conveying pipe and the soldering flux conveying pipe which are sleeved together to output gas and soldering flux through independent channels respectively.

Furthermore, an atomizing device is arranged at a welding flux outlet of the fire nozzle, and liquid welding flux is atomized by the atomizing device and then sprayed out from the welding flux outlet of the fire nozzle.

Furthermore, the burner gas outlet is surrounded around the burner soldering flux outlet.

Compared with the prior art, the beneficial effect of this application lies in: the soldering flux is conveyed to the front end of the welding gun in a liquid state, the soldering flux is separated from fuel gas all the time in the conveying process, the conveying channel is filled with the liquid soldering flux, and external oxidizing substances are difficult to enter the conveying channel of the soldering flux, so that the soldering flux can be prevented from crystallizing in the channel and further blocking the channel; in addition, the method can solve the problem that the soldering flux is not easy to carry out when the gas carries the soldering flux; the soldering flux supply method can improve the utilization rate of the soldering flux.

Drawings

FIG. 1 is a schematic view of an embodiment of a flame welding apparatus;

FIG. 2 is a schematic view of another embodiment of a flame welding apparatus;

FIG. 3 is a schematic view of an embodiment of a welding gun;

FIG. 4 is a schematic view of an embodiment of a torch tip of the torch;

FIG. 5 is a partial schematic view of an embodiment of a burner wherein the third burner tube is not shown;

FIG. 6 is a partial schematic view of an embodiment of a gun body;

FIG. 7 is a partial schematic view of another embodiment of a gun body;

FIG. 8 is a schematic view of one embodiment of a delivery unit;

FIG. 9 is a cross-sectional view of one embodiment of a delivery unit;

FIG. 10 is an enlarged view of a portion of the embodiment of FIG. 9;

FIG. 11 is an enlarged view of a portion of the embodiment of FIG. 9;

in the figure:

1. a welding gun;

11. a gun body; 11-11, a welding gun gas inlet; 11-12, a welding gun flux inlet; 11-1, a gun body gas channel; 11-2, a gun body flux channel; 11-3, a gas control valve; 11-4, a flux control valve;

12. a burner; 12-11, a burner gas outlet; 12-12, a nozzle flux outlet; 12-1, a burner gas channel; 12-2, a nozzle flux channel;

121. a first housing; 121-1, a first channel of a burner; 121-2, a nozzle second channel; 121-3, a through hole;

122. a second housing;

123. a third burner tube;

13. an atomizing device;

2. a gas supply unit; 21. a gas supply device; 22. a gas supply pipe; 221. a first solenoid valve;

3. a flux supply unit; 31. a soldering flux storage tank;

4. an auxiliary gas supply unit; 41. a first auxiliary gas channel; 42. a second auxiliary gas channel; 421. a second solenoid valve;

43. a pressure reducing valve; 44. a compressed gas supply pipe; 45. a three-way joint;

5. an oxygen supply unit;

6. a conveying unit;

601. a gas delivery channel; 602. a flux delivery channel; 603. an oxygen delivery channel;

61. a gas delivery pipe; 62. a soldering flux delivery pipe;

63. a first crossover sub; 63-110, a first outer shell; 63-112, a first gas inlet; 63-113, a first gas outlet; 63-120, a first inner housing; 63-121, a first flux cavity; 63-122, a first flux inlet; 63-123, a first flux outlet; 63-130, a first gas chamber;

64. a second crossover sub; 64-210, a second outer housing; 64-212, a second gas outlet; 64-213, a second gas inlet; 64-220, a second inner housing; 64-221, a second flux cavity; 64-222, a second flux outlet; 64-223, a second flux inlet; 64-230, a second fuel gas chamber.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.

It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The term "optionally including" in the description and claims of this application means including or not including.

The application provides a supplying method of soldering flux, which comprises the following steps:

and S2, jetting out fuel gas from a fuel gas outlet at the front end of the welding gun, and jetting out soldering flux from a soldering flux outlet at the front end of the welding gun, so that the fuel gas and the soldering flux are mixed at the front end of the welding gun.

According to the method, the soldering flux is conveyed to the front end of the welding gun in a liquid state, the soldering flux is separated from fuel gas all the time in the conveying process, the conveying channel is filled with the liquid soldering flux, and external oxidizing substances are difficult to enter the conveying channel of the soldering flux, so that the soldering flux can be prevented from crystallizing in the channel and further blocking the channel. The soldering flux and the fuel gas are sprayed out from the front end of the welding gun and are mixed and combusted at the front end of the welding gun, so that the utilization rate of the soldering flux is improved, and the welding effect is improved.

In some embodiments, in the step S2, the flux is atomized at the flux outlet and then sprayed forward. The atomized soldering flux is sprayed out, so that the soldering flux and fuel gas are fully mixed, and the utilization rate of the soldering flux is further improved.

In some embodiments, in step S2, the soldering flux is sprayed forward from the middle of the front end of the soldering gun, and the fuel gas is sprayed forward from the periphery of the soldering flux.

In some embodiments, during the process of delivering the fuel gas and the soldering flux to the soldering gun, at least a part of the delivery channel of the soldering flux is sleeved in the delivery channel of the fuel gas. The conveying channel of the soldering flux is sleeved in the conveying channel of the fuel gas, so that the external structure can be simplified, the conveying channel of the soldering flux is protected, and the conveying channel of the soldering flux is not easy to bend or damage.

As shown in fig. 1 or 2, the present application also provides a flame welding apparatus including a welding torch 1, a gas supply unit 2, a flux supply unit 3, and a delivery unit 6.

The welding gun 1 has a welding gun gas passage and a welding gun flux passage. The rear end of the welding gun gas channel is a welding gun gas inlet 11-11, and the front end is a burner gas outlet 12-11, as shown in figure 3. The rear end of the soldering flux channel of the soldering gun is provided with a soldering flux inlet 11-12 of the soldering gun, and the front end is provided with a nozzle soldering flux outlet 12-12, as shown in figure 3. The welding gun gas channel is not communicated with the welding gun soldering flux channel, and the burner gas outlet 12-11 is close to the burner soldering flux outlet 12-12.

The delivery unit 6 comprises a gas delivery channel 601 and a flux delivery channel 602. The gas supply unit 2 is adapted to supply gas to the torch gas inlet 11-11 through the gas supply channel 601 so that the gas is discharged from the torch gas outlet 12-11 after passing through the torch gas channel. The flux supply unit 3 is adapted to input liquid flux into the flux inlet 11-12 of the soldering gun through the flux delivery channel 602, so that the flux is ejected from the flux outlet 12-12 of the nozzle after passing through the flux channel of the soldering gun.

The application provides a flame welding equipment can carry the scaling powder of liquid, and the scaling powder is separated with the gas all the time in transportation process, and liquid scaling powder is full of scaling powder conveying channel 602 and welder scaling powder passageway, and outside oxidizing substance is difficult to get into scaling powder conveying channel 602 and welder scaling powder passageway to can avoid the scaling powder to crystallize in the passageway, and then block up the passageway. The application provides a flame welding equipment is with scaling powder and gas from welder's front end blowout and mix, is favorable to improving the utilization ratio of scaling powder to improve the welding effect.

The flame welding apparatus further optionally comprises an oxygen supply unit 5 and the welding torch 1 further optionally comprises an oxygen inlet (not shown in the figures). Delivery unit 6 also optionally includes an oxygen delivery channel 603. One end of the oxygen delivery passage 603 communicates with the oxygen supply unit 5, and the other end communicates with the oxygen inlet of the torch 1, so that oxygen is delivered to the torch 1 through the oxygen delivery passage 603.

It will be appreciated by those skilled in the art that the oxygen supply unit 5 may be selected according to the actual requirements. In some embodiments, the gas supply unit 2 supplies a mixture of combustible gas and combustion-supporting gas as the gas, such as oxyhydrogen, and in this case, the additional oxygen supply unit 5 may not be required to supply oxygen. In other embodiments, the fuel gas supply unit 2 only supplies combustible gas such as acetylene, propane, natural gas, hydrogen, etc., and at this time, the oxygen supply unit 5 needs to be added to supply combustion-supporting gas to ensure that the fuel gas can be sufficiently combusted.

In some embodiments, the flame welding apparatus further comprises an auxiliary gas supply unit 4. The flux unit 3 includes a flux reservoir 31. The auxiliary gas supply unit 4 supplies auxiliary gas into the flux storage tank 31 through the first auxiliary gas channel 41, and the auxiliary gas is used for pressing liquid flux from the flux storage tank 31 into the flux conveying channel 602 so that the flux is conveyed in the liquid form in the flux conveying channel 602. It is worth mentioning that the auxiliary gas provided by the auxiliary gas supply unit 4 is chemically inert with respect to the flux, and the auxiliary gas may be compressed air, nitrogen, inert gas, etc. The method and the device have the advantages that the utilization rate of the soldering flux can be improved by conveying the soldering flux in the mode, and the problem that part of the soldering flux is not easy to take out when the soldering flux is carried by using gas is avoided.

In some embodiments, the gas supply unit 2 is an oxyhydrogen generation device adapted to provide an oxyhydrogen mixture as the gas.

In some embodiments, at least a portion of the flux delivery channel 602 is nested within the gas delivery channel 601.

In some embodiments, an atomizing device 13 is disposed at the burner flux outlet 12-12, and the liquid flux is atomized by the atomizing device 13 and then sprayed out from the burner flux outlet 12-12.

In some embodiments, the burner gas outlet 12-11 surrounds the burner flux outlet 12-12.

The present application further provides a welding gun 1, as shown in fig. 4-7. The welding gun 1 includes a gun body 11 and a torch 12 provided at a front end of the gun body 11.

The gun body 11 is internally provided with a gun body gas channel 11-1 and a gun body flux channel 11-2. The first end of the gun body gas channel 11-1 is a welding gun gas inlet 11-11, and the second end of the gun body gas channel 11-1 extends to the position of the fire nozzle 12, so that gas enters the fire nozzle 12 through the gun body gas channel 11-1. The first end of the gun body flux channel 11-2 is a welding gun flux inlet 11-12, and the second end of the gun body flux channel 11-2 extends to the position of the fire nozzle 12, so that liquid flux enters the fire nozzle 12 through the gun body flux channel 11-2. It will be appreciated that the gun body gas passage 11-1 and the gun body flux passage 11-2 are not in communication with each other within the gun body 11, i.e., gas and liquid flux are delivered independently of each other within the gun body 11. In some embodiments, the oxygen inlet 11-13 of the torch 1 communicates with the body fuel gas passageway 11-1 so that oxygen and fuel gas mix within the body fuel gas passageway 11-1.

The burner 12 has a burner gas outlet 12-11 and a burner flux outlet 12-12. An atomizing device 13 is arranged at the position of the flux outlet 12-12 of the burner. The burner gas outlet 12-11 is communicated with the second end of the gun body gas channel 11-1, and the burner scaling powder outlet 12-12 is communicated with the second end of the gun body scaling powder channel 11-2. The liquid soldering flux is atomized by the atomizing device 13 and then sprayed out from the burner soldering flux outlet 12-12. The gas is sprayed out from the gas outlet 12-11 of the burner.

Further, the burner 12 is internally provided with a burner gas channel 12-1 and a burner flux channel 12-2. The first end of the burner gas channel 12-1 is communicated with the second end of the gun body gas channel 11-1, and the second end of the burner gas channel 12-1 is a burner gas outlet 12-11. The first end of the nozzle flux channel 12-2 is communicated with the second end of the gun body flux channel 11-2, and the second end of the nozzle flux channel 12-2 is a nozzle flux outlet 12-12.

The welding gun 1 provided by the application can greatly avoid the contact of the soldering flux and fuel gas in advance, and can also avoid the crystallization of the soldering flux due to the contact of the soldering flux and oxidizing substances. In this application, the scaling powder is carried to burner 12 in with liquid form, and through atomizing device 13 blowout again, the scaling powder can mix with burner 12 spun gas well, and this is favorable to improving the utilization ratio of scaling powder, the effect of full play scaling powder.

Furthermore, the burner gas outlet 12-11 is arranged around the burner flux outlet 12-12, i.e. the burner gas outlet 12-11 is annular, so that the gas is sprayed forwards from the periphery of the flux and the gas and the flux are mixed in the area in front of the burner 12. Fig. 4 is a schematic diagram of the soldering flux and the fuel gas after being sprayed out from the burner 12, in the diagram, the area a is mainly the atomized soldering flux, the area B is the mixed combustion area of the fuel gas and the soldering flux, and the spraying area of the atomized soldering flux is located in the spraying area of the fuel gas, which is beneficial to improving the utilization rate of the soldering flux and reducing or avoiding the waste of the soldering flux.

In some embodiments of torch 1, torch 12 includes a first housing 121, a second housing 122, and a third torch conduit 123, as shown in fig. 4 and 5. Wherein fig. 5 shows the first housing 121 and the second housing 122, and the third burner pipe 123 is not shown.

The first housing 121 has a first channel 121-1 and a second channel 121-2, and the front end of the first channel 121-1 is connected to the rear end of the second channel 121-2.

The third burner pipe 123 is sleeved in the first burner channel 121-1, a first end of the third burner pipe 123 is communicated with a second end of the gun body flux channel 11-2, and a second end of the third burner pipe 123 is connected to the second burner channel 121-2, so that the first burner channel 121-1 and the second burner channel 121-2 are isolated by the third burner pipe 123. The front end of the second channel 121-2 of the burner extends to the front end of the burner 12 to form the burner flux outlet 12-12.

A first annular channel is formed between the outer wall of the third burner pipeline 123 and the inner wall of the first burner channel 121-1 and used for conveying fuel gas, and the second end of the first annular channel is communicated with the second end of the gun body fuel gas channel 11-1. The second casing 122 is sleeved outside the first casing 121, a second annular channel is formed between the inner wall of the second casing 122 and the outer wall of the first casing 121, and the front end outlet of the second annular channel forms the burner gas outlet 12-11. The first housing 121 has at least one through hole 121-3 for communicating the first annular passage and the second annular passage, so that the first annular passage and the second annular passage communicate to form a burner gas passage 12-1.

In some embodiments of the torch 1, the first channel 121-1 of the torch has a larger inner diameter at one end near the gun body 11 than at the other end.

In some embodiments of the welding gun 1, the atomizing device 13 comprises a spacer having a plurality of atomizing holes therein.

In some embodiments of the torch 1, the atomizing device 13 is disposed within the torch second passageway 121-2. The outlet of the burner second channel 121-2 forms an enlarged end.

In some embodiments of the welding gun 1, a gas control valve 11-3 for controlling gas delivery is provided on a body gas passage 11-1 of the gun body 11, and a flux control valve 11-4 for controlling flux delivery is provided on a body flux passage 11-2.

In some embodiments of the welding gun 1, the body flux passage 11-2 of the gun body 11' is disposed in the body gas passage 11-1, i.e., the body flux passage 11-2 is disposed in the body gas passage 11-1 from the first end to the second end. The welding gun soldering flux inlet 11-12 is sleeved in the welding gun gas inlet 11-11, and external gas and soldering flux are conveyed into the welding gun 1 in a sleeved pipeline mode. Fig. 6 is a partial schematic view of the gun body 11', wherein the dashed arrows indicate the flux delivery and the solid arrows indicate the gas delivery.

In other embodiments of the welding gun 1, a portion of the body flux passage 11-2 extends into the body gas passage 11-1 such that a first end of the body flux passage 11-2 of the body 11 "is independent of a first end of the body gas passage 11-1 and a second end of the body flux passage 11-2 is nested within a second end of the body gas passage 11-1. When the gun body soldering flux channel 11-2 extends into the gun body gas channel 11-1, the gun body soldering flux channel 11-2 is not communicated with the gun body gas channel 11-1. Fig. 7 is a partial schematic view of the gun body 11 "with dashed arrows indicating flux delivery and solid arrows indicating gas delivery.

In some embodiments of the delivery unit 6, as shown in fig. 8 and 9, the delivery unit 6 comprises a gas delivery tube 61, a flux delivery tube 62, and a first transition joint 63. The soldering flux conveying pipe 62 is sleeved in the fuel gas conveying pipe 61, and the outer diameter of the soldering flux conveying pipe 62 is smaller than the inner diameter of the fuel gas conveying pipe 61, so that fuel gas is conveyed in a gap between the soldering flux conveying pipe 62 and the fuel gas conveying pipe 61, and soldering flux is conveyed in the soldering flux conveying pipe 62. The first adapter 63 is used for communicating the gas supply pipe of the gas supply unit 2 and the flux supply pipe of the flux supply unit 3 which are independent of each other with the gas delivery pipe 61 and the flux delivery pipe 62 which are sleeved together.

The delivery unit 6 further optionally comprises a second adapter 64, and the second adapter 64 is used for enabling the gas delivery pipe 61 and the soldering flux delivery pipe 62 which are sleeved together to output the gas and the soldering flux respectively in independent channels.

As shown in FIG. 10, the first adapter 63 includes a first outer housing 63-110 defining a first cavity and a first inner housing 63-120 defining a first flux chamber 63-121, the first inner housing 63-120 being disposed within the first cavity such that a first gas chamber 63-130 is formed between an inner wall of the first outer housing 63-110 and an outer wall of the first inner housing 63-120.

The first outer casing 63-110 has a first gas inlet 63-112 and a first gas outlet 63-113. The gas supply pipe of the gas supply unit 2 communicates with the first gas chambers 63 to 130 through the first gas inlets 63 to 112. The first end of the gas delivery pipe 61 is connected to the first gas outlets 63-113 such that the gas delivery pipe 61 communicates with the first gas chambers 63-130. The second end of the gas delivery pipe 61 is in communication with the torch gas inlet 11-11 of the torch 1, so that gas from the gas supply unit 2 enters the first gas chamber 63-130 through the first gas inlet 63-112, then enters the gas delivery pipe 61 through the first gas outlet 63-113, and finally reaches the torch body gas channel 11-1 of the torch 1.

The first inner housing 63-120 has a first flux inlet 63-122 and a first flux outlet 63-123. The first flux inlet 63-122 extends to the outside of the first outer housing 63-110 through a through hole, and the flux supply pipe of the flux supply unit 3 communicates with the first flux chamber 63-121 through the first flux inlet 63-122. The first flux outlets 63-123 extend to the first gas outlets 63-113, the first flux outlets 63-123 having an outer diameter smaller than an inner diameter of the first gas outlets 63-113, and a first end of the flux delivery tube 62 is connected to the first flux outlets 63-123 such that the flux delivery tube 62 communicates with the first flux cavities 63-121. The second end of the flux delivery tube 62 is in communication with the solder gun flux inlet 11-12 of the solder gun 1, such that the flux from the flux supply unit 3 enters the first flux chamber 63-121 through the first flux inlet 63-122, then enters the flux delivery tube 62 through the first flux outlet 63-123, and finally is delivered to the gun body flux channel 11-2 of the solder gun 1.

As shown in FIG. 11, the second adapter 64 includes a second outer housing 64-210 defining a second cavity and a second inner housing 64-220 defining a second flux cavity 64-221. The second inner housing 64-220 is provided in the second chamber so that a second gas chamber 64-230 is formed between the inner wall of the second outer housing 64-210 and the outer wall of the second inner housing 64-220.

The second outer housing 64-210 has a second fuel gas outlet 64-212 and a second fuel gas inlet 64-213. The second gas outlet 64-212 is in communication with the torch gas inlet 11-11. The second end of gas delivery pipe 61 is connected to second gas inlets 64-213 so that gas delivery pipe 61 communicates with second gas chambers 64-230. The fuel gas enters the first fuel gas cavity 63-130 from the fuel gas supply unit 2 through the first fuel gas inlet 63-112, then enters the fuel gas delivery pipe 61, then enters the second fuel gas cavity 64-230 through the second fuel gas inlet 64-213, and then is output from the second fuel gas outlet 64-212 and sent to the gun body fuel gas channel 11-1 of the welding gun 1.

The second inner housing 64-220 has a second flux outlet 64-222 and a second flux inlet 64-223. The second flux outlet 64-222 extends out of the second housing 64-210 through a through hole, and the second flux outlet 64-222 communicates with the solder gun flux inlet 11-12. Second flux inlet openings 64-223 extend to second flux inlet openings 64-213, an outer diameter of second flux inlet openings 64-223 is less than an inner diameter of second flux inlet openings 64-213, and a second end of flux delivery tube 62 is coupled to second flux inlet openings 64-223 such that flux delivery tube 62 is in communication with second flux cavities 64-221. The soldering flux enters the first soldering flux cavities 63-121 from the soldering flux supply unit 3 through the first soldering flux inlets 63-122, then enters the soldering flux conveying pipe 62, then enters the second soldering flux cavities 64-221 through the second soldering flux inlets 64-223, and then is output from the second soldering flux outlets 64-222 to be conveyed into the gun body soldering flux channels 11-2 of the soldering gun 1.

The auxiliary gas supply unit 4 of the present application can also be used to avoid a tempering phenomenon at the end of welding. As shown in fig. 1, the auxiliary gas supply unit 4 is communicated with the gas delivery passage 601 through a second auxiliary gas passage 42, and a second electromagnetic valve 421 is provided on the second auxiliary gas passage 42, and the second electromagnetic valve 421 is used for opening or closing the second auxiliary gas passage 42. The gas supply unit 2 includes a gas supply device 21 and a gas supply pipe 22 for communicating the gas supply device 21 and the gas delivery passage 601, the gas supply pipe 22 is provided with a first electromagnetic valve 221, and the first electromagnetic valve 221 is used for opening or closing the gas supply pipe 22. The gas supplied from the auxiliary gas supply unit 4 is a non-combustible gas, and may be air, nitrogen, an inert gas, or the like.

The flame welding equipment further comprises a control unit, wherein the control unit is suitable for receiving a welding end signal and is in communication connection with the first electromagnetic valve 221 and the second electromagnetic valve 421 for controlling the opening and closing of the first electromagnetic valve 221 and the second electromagnetic valve 421.

During welding, the first solenoid valve 221 is opened and the second solenoid valve 421 is closed. When the control unit receives the end signal, the first electromagnetic valve is still kept open, the second electromagnetic valve 421 is controlled to open the second auxiliary gas passage 42, after the second auxiliary gas passage 42 is opened for a period of time, the first electromagnetic valve 221 is controlled to close the gas supply pipe 22, and after the gas supply pipe 22 is closed for a period of time, the second electromagnetic valve 421 is controlled to close the second auxiliary gas passage 42.

It should be noted that the ending signal may be sent to the control unit manually, or may be sent to the control unit by other devices, which is not limited in this application.

When the device of the application is used for finishing welding, a gas control valve on a welding gun does not need to be closed, and only a finishing signal needs to be sent. The control unit receives the end signal, does not immediately close the gas delivery, but first delivers the auxiliary gas into the gas delivery channel 601, utilizes the auxiliary gas to continuously carry out the gas remained in the welding gun, closes the gas delivery after a period of time, and continues to deliver the auxiliary gas after the gas delivery is closed for a period of time, so that the gas in the welding gun is fully discharged, and then closes the second auxiliary gas channel 42, at the moment, the welding gun is filled with the non-combustible gas, so as to avoid the backfire phenomenon.

The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims

1. The soldering flux supplying method is characterized by comprising the following steps:

2. The method for supplying soldering flux according to claim 1, wherein in step S2, the soldering flux is atomized at the soldering flux outlet and then sprayed forward.

3. The method for supplying flux according to claim 1, wherein in step S2, the flux is jetted forward from a middle portion of a front end of the soldering gun, and the gas is jetted forward from a periphery of the flux.

4. The method for supplying soldering flux according to any one of claims 1 to 3, wherein during the process of delivering the fuel gas and the soldering flux to the soldering gun, at least a part of a delivery channel of the soldering flux is sleeved in the delivery channel of the fuel gas.

5. A flame welding apparatus, comprising:

6. The flame soldering apparatus of claim 5, wherein the flux supply unit comprises a flux reservoir, the flame soldering apparatus further comprising an auxiliary gas supply unit adapted to input an auxiliary gas into the flux reservoir through a first auxiliary gas channel, the auxiliary gas being used to force the liquid flux from the flux reservoir into the flux delivery channel for delivery to the solder gun flux channel of the solder gun.

7. The flame soldering apparatus of claim 5, wherein at least a portion of the flux delivery channel is nested within the gas delivery channel.

8. The flame soldering apparatus according to claim 7, wherein the conveying unit includes a gas conveying pipe, a flux conveying pipe, and a first adapter, the flux conveying pipe is sleeved in the gas conveying pipe, the outer diameter of the flux conveying pipe is smaller than the inner diameter of the gas conveying pipe, so that the gas is suitable for conveying in the gap between the flux conveying pipe and the gas conveying pipe, the flux is suitable for conveying in the flux conveying pipe, the first adapter is used for enabling the gas supply pipe of the gas supply unit and the flux supply pipe of the flux supply unit which are independent of each other to be respectively communicated with the gas conveying pipe and the flux conveying pipe which are sleeved together, the conveying unit further optionally includes a second adapter, the second adapter is used for enabling the gas conveying pipe and the flux conveying pipe which are sleeved together to be respectively conveyed in independent channels Gas and soldering flux are discharged.

9. The flame welding device of claim 5, wherein an atomizing device is disposed at the burner flux outlet, and the liquid flux is atomized by the atomizing device and then sprayed out of the burner flux outlet.

10. The flame welding apparatus of any of claims 5-9, wherein the burner gas outlet surrounds the burner flux outlet.