Brazing device and brazing system

Abstract

The invention discloses a brazing device and a brazing system, and relates to the technical field of welding, the brazing device comprises a welding gun and an injection mechanism, and the welding gun is provided with a plurality of welding heads; the spraying mechanism is provided with a plurality of spraying heads, and each spraying head is provided with an air spraying opening and a liquid spraying opening; and each welding head is arranged corresponding to at least one spray head so as to provide protective gas and cooling liquid for a welding area of the welding head. The invention aims to provide the brazing device with high brazing quality.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and particularly to a brazing device and a brazing system. Background Art

[0002] Manual brazing devices can be used for brazing work on workpieces such as copper pipes, steel pipes, and aluminum pipes. However, when the existing manual brazing devices are used for brazing workpieces, the workpieces are prone to oxidation, so the brazing quality is low. Summary of the Invention

[0003] The main object of the present invention is to propose a brazing device and a brazing system, aiming to improve the brazing quality of the brazing device.

[0004] To achieve the above object, the brazing device proposed by the present invention is used for brazing work on steel material workpieces, and the brazing device includes:

[0005] A welding torch, the welding torch having a plurality of welding heads; and

[0006] An injection mechanism, the injection mechanism having a plurality of nozzles, each of the nozzles having a gas jet port and a liquid jet port; each of the welding heads is correspondingly provided with at least one of the nozzles;

[0007] The injection mechanism is used to control the gas jet port of the nozzle to provide a shielding gas for the welding area of the welding head when the welding torch is in the brazing work; and to control the liquid jet port of the nozzle to provide a cooling liquid for the welding area of the welding head when the welding torch completes the current welding action, so as to cool the welding part of the steel material workpiece in the welding area.

[0008] In one embodiment, the welding torch includes a first main body section and a first brazing section, and a plurality of the welding heads are spaced on the first brazing section and face the same area; the first main body section is connected and communicated with the first brazing section, and the first main body section is used for inputting brazing fuel into the first brazing section.

[0009] In one embodiment, the first brazing section is arranged in an open ring shape or a closed ring shape, and a plurality of the welding heads are arranged at intervals along the extending direction of the first brazing section.

[0010] In one embodiment, the first brazing section includes a first section and a second section, the first ends of the first section and the second section are respectively connected to the first main body section, the second ends of the first section and the second section are spaced apart, and at least one of the welding heads is provided on both the first section and the second section.

[0011] In one embodiment, both the first section and the second section are arranged in an arc shape, and the arc length of one of the first section and the second section is greater than that of the other.

[0012] In one embodiment, it further includes a diverter having a liquid inlet, a first diversion port, and a second diversion port that are interconnected. The liquid inlet is connected to the first main section, the first diversion port is connected to the first end of the first section, and the second diversion port is connected to the first end of the second section;

[0013] The liquid inlet and the first diversion port are in communication to form a first channel, and the liquid inlet and the second diversion port are in communication to form a second channel. The first channel and the second channel are used for the flow of the brazing fuel.

[0014] In one embodiment, the diverter further includes a third diversion port that is connected to one of the welding heads;

[0015] The liquid inlet and the third diversion port are in communication to form a third channel, and the third channel is used for the flow of the brazing fuel.

[0016] In one embodiment, there are a plurality of the welding heads evenly spaced on the first section and / or the second section.

[0017] In one embodiment, there are a plurality of the welding heads on the first section, and the distribution density of the plurality of the welding heads on the first section gradually increases from the first end to the second end of the first section; and / or,

[0018] There are a plurality of the welding heads on the second section, and the distribution density of the plurality of the welding heads on the second section gradually increases from the first end to the second end of the second section.

[0019] In one embodiment, the first brazing section is arranged in an open ring shape, and the nozzles of the plurality of the welding heads face the annular central area of the first brazing section.

[0020] In one embodiment, one end of the first brazing section is connected to the first main section, and the other end is suspended.

[0021] In one embodiment, the welding torch has a first welding head assembly, a second welding head assembly, and a driving assembly. The driving assembly is respectively drivingly connected to the first welding head assembly and the second welding head assembly;

[0022] The first welding head assembly and the second welding head assembly have a first relative position and a second relative position. When the first welding head assembly and the second welding head assembly are in the first relative position, the first welding head assembly and the second welding head assembly are spaced apart by a first distance. When the first welding head assembly and the second welding head assembly are in the second relative position, the first welding head assembly and the second welding head assembly are spaced apart by a second distance, and the first distance is greater than the second distance;

[0023] The driving assembly is used to drive the first welding head assembly and the second welding head assembly to switch between the first relative position and the second relative position.

[0024] In one embodiment, both the first welding head assembly and the second welding head assembly include a second main body section and a second brazing section; the second main body section is used for inputting brazing fuel into the second brazing section, and a plurality of the welding heads are spaced apart on the second brazing section;

[0025] The second main body section is in communication with the second brazing section, and the second brazing section is arranged in a curved shape. When the first welding head assembly and the second welding head assembly are in the second relative position, the second brazing sections of the first welding head assembly and the second welding head assembly enclose an open ring or a closed ring.

[0026] In one embodiment, the spraying mechanism includes:

[0027] An input pipe section;

[0028] An output pipe section, the input end of the output pipe section is connected to the output end of the input pipe section, and the output end of the output pipe section is connected to at least one of the nozzles;

[0029] The input pipe section is used for inputting protective gas and cooling liquid into the output pipe section, and the output pipe section sprays the protective gas and the cooling liquid through the nozzles.

[0030] In one embodiment, the number of the output pipe sections is multiple;

[0031] The spraying mechanism further includes a shunt pipe section, the shunt pipe section has a plurality of shunt ports corresponding to the number of the output pipe sections, the input end of the shunt pipe section is connected to the output end of the input pipe section, and the plurality of shunt ports of the shunt pipe section are respectively connected to the plurality of output pipe sections in one-to-one correspondence.

[0032] In one embodiment, one nozzle is connected to the output end of each output pipe section;

[0033] The spraying area of each nozzle partially overlaps with the welding area of the welding head.

[0034] In one embodiment, the gas jet orifice and the liquid jet orifice extend along a first direction, the gas jet orifice and the liquid jet orifice are spaced apart along a second direction, and the first direction intersects with the second direction.

[0035] In one embodiment, a plurality of gas spray holes are provided on the gas jet orifice, and the plurality of gas spray holes extend along the first direction;

[0036] A plurality of liquid spray holes are provided on the liquid jet orifice, and the plurality of liquid spray holes extend along the first direction.

[0037] In one embodiment, the shielding gas includes one or more of nitrogen, nitrogen-hydrogen mixed gas, and argon.

[0038] In one embodiment, the brazing device further includes a movable bracket, the welding torch and the spraying mechanism are arranged on the movable bracket, and the movable bracket is used to drive the welding torch and the spraying mechanism when moving.

[0039] The present invention also provides a brazing system, and the brazing system includes the brazing device as described in any one of the above.

[0040] The brazing device of the present invention aims to improve the brazing quality. The brazing device includes a welding torch and a spraying mechanism. The welding torch is used for brazing a target workpiece. The nozzle of the spraying mechanism includes a gas jet port and a liquid jet port. The gas jet port is used to work synchronously with the welding torch to spray a shielding gas when the welding head sprays fire, and this shielding gas can prevent the workpiece to be brazed from being oxidized at high temperature. The liquid jet port is used to spray a cooling liquid on the workpiece after the welding torch finishes working, that is, after the workpiece is brazed, so as to accelerate the cooling speed of the workpiece and effectively avoid the negative impacts brought by overheating of the workpiece, such as oxidation and material deterioration. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0042] Figure 1 It is a schematic structural diagram of an embodiment of the brazing device provided by the present invention;

[0043] Figure 2 Corresponding to Figure 1 a schematic structural diagram of another perspective;

[0044] Figure 3 It is a schematic structural diagram of an embodiment of the brazing device in the prior art;

[0045] Figure 4 It is a schematic structural diagram of another embodiment of the brazing device in the prior art;

[0046] Figure 5 It is a schematic structural diagram of the first embodiment of the welding torch provided by the present invention;

[0047] Figure 6 It is a schematic structural diagram of the second embodiment of the welding torch provided by the present invention;

[0048] Figure 7 Schematic diagram of the structure of the third embodiment of the welding torch provided by the present invention;

[0049] Figure 8 Schematic diagram of the structure of the fourth embodiment of the welding torch provided by the present invention;

[0050] Figure 9 Schematic diagram of the structure of the fifth embodiment of the welding torch provided by the present invention;

[0051] Figure 10 Schematic diagram of the structure of the sixth embodiment of the welding torch provided by the present invention;

[0052] Figure 11 Schematic diagram of the structure of the welding torch corresponding to the second relative position provided by the present invention;

[0053] Figure 12 Schematic diagram of the structure of the welding torch corresponding to the first relative position provided by the present invention;

[0054] Figure 13 Schematic diagram of the structure of an embodiment of the spraying mechanism provided by the present invention;

[0055] Figure 14 Schematic diagram of the structure of another embodiment of the brazing device provided by the present invention;

[0056] Figure 15 Schematic diagram of the structure of another embodiment of the spraying mechanism provided by the present invention;

[0057] Figure 16 Schematic diagram of the mechanism of the nozzle of the present invention in an embodiment.

[0058] Explanation of the reference numerals in the drawings:

[0059] 10. Brazing device;

[0060] 100. Welding torch; 110. Welding head; 120. First main body section; 130. First brazing section; 131. First section; 132. Second section; 140. Diverter; 150. First welding head assembly; 160. Second welding head assembly; 171. Second main body section; 172. Second brazing section;

[0061] 200. Spraying mechanism; 210. Input pipe section; 220. Output pipe section; 230. Diverting pipe section; 240. Nozzle; 241. Gas jet port; 242. Liquid jet port;

[0062] 20. Workpiece to be welded.

[0063] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0064] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0065] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0066] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0067] The air-conditioning industry has a large demand for copper resources, which is mainly reflected in the manufacturing of system pipelines and structural parts, and its consumption accounts for about 15% of the total refined copper consumption in the country. However, China's copper resources are relatively scarce, with the proven reserves only accounting for 5% of the global total, and the external dependence reached 80.2% in 2022. The dependence on imported copper ore has led to an increase in the overall cost. With the rapid development of fields such as new energy vehicles and photovoltaic power generation, the demand for refined copper has further increased, exacerbating the situation of global and domestic copper supply falling short of demand, and at the same time bringing problems such as too high costs and long transportation cycles, seriously affecting the output and operation of the air-conditioning industry.

[0068] In order to alleviate the dependence on copper resources and the cost problems brought about by it, research on "replacing copper with aluminum" and "replacing copper with steel" is underway in the air-conditioning industry, especially taking steel pipelines as an important direction to replace pure copper pipelines. However, due to the significant differences in composition, thermal conductivity, high-temperature performance, and brazing performance between pure copper and steel and aluminum materials, especially the brazing performance and thermal conductivity of steel are far inferior to those of pure copper.

[0069] When the existing manual soldering device 10 solders a steel pipeline, the workpiece 20 to be soldered is prone to oxidation and blackening during the soldering process, resulting in unstable soldering process and low qualification rate, and thus having poor soldering quality. In particular, the soldering performance and thermal conductivity of steel are much worse than those of pure copper. When the existing soldering device 10 solders a steel pipeline, after being heated to a high temperature, it is extremely easy to oxidize and blacken, hindering the molten solder from flowing and filling inside the steel solder joint, resulting in problems such as unstable soldering process and low soldering qualification rate, so the soldering quality is poor.

[0070] To improve the soldering quality, the soldering device 10 proposed by the present invention, as Figure 1 and Figure 16 shown, in one embodiment, the soldering device 10 includes a soldering gun 100 and a spraying mechanism 200. The soldering gun 100 is used to spray fire on the workpiece 20 to be soldered, and the spraying mechanism 200 is used to spray cooling liquid and protective gas on the workpiece 20 to be soldered, so as to improve the soldering quality.

[0071] Among them, the workpiece 20 to be soldered can be an evaporator and a condenser in an air conditioner, etc. In particular, the workpiece 20 in this embodiment can specifically be a steel material workpiece, such as a steel pipe on an evaporator or a condenser. Of course, this soldering device can also be applied to workpieces other than air conditioners, and specific details are not limited here. Through this soldering device 10, the soldering quality of steel material workpieces can be improved, which will be specifically explained later. It should be noted that if there is no special indication for the subsequent workpiece 20 to be soldered, it preferably refers to a steel material workpiece.

[0072] In this embodiment, as Figure 1 and Figure 2 shown, the soldering gun 100 has a plurality of welding heads 110. It can be understood that the plurality of welding heads 110 can heat a plurality of target workpieces simultaneously, which helps to achieve a more uniform heating effect, thereby improving the soldering quality and efficiency. Optionally, a soldering area is formed among the plurality of welding heads 110. When the workpiece 20 to be soldered is in this soldering area, the plurality of welding heads 110 can spray fire towards this soldering area. Among them, the welding head 110 can be arranged facing the workpiece 20 to be soldered, or can be arranged near the workpiece 20 to be soldered, and specific details are not limited here.

[0073] Optionally, the plurality of welding heads 110 are all arranged facing the workpiece 20 to be soldered, which can increase the uniformity of soldering to improve the soldering quality.

[0074] In this embodiment, as Figure 1 and Figure 2As shown, the spraying mechanism 200 has a plurality of nozzles 240, and each nozzle 240 has a gas jet port 241 and a liquid jet port 242; each welding head 110 is correspondingly arranged with at least one nozzle 240 to provide a shielding gas and a cooling liquid for the welding area of the welding head 110.

[0075] Optionally, the number of the gas jet ports 241 and the liquid jet ports 242 can be one or more than one, and the number of the gas jet ports 241 and the liquid jet ports 242 is not limited herein. The gas jet port 241 is used to spray a shielding gas when the welding torch 100 sprays fire, so that the shielding gas covers the workpiece 20 to be welded to avoid oxidation of the workpiece; the liquid jet port 242 is used to spray a cooling liquid after the workpiece 20 to be welded is brazed, so that the protective liquid covers the workpiece 20 to be welded. Wherein, the nozzle 240 can be arranged facing the workpiece 20 to be welded or near the workpiece 20 to be welded, which is not limited herein.

[0076] Optionally, both the gas jet port 241 and the liquid jet port 242 face the welding position of the workpiece 20 to be welded, so that the gas and liquid sprayed by the spraying mechanism 200 can act on the workpiece to the greatest extent and improve the efficiency.

[0077] In this embodiment, the spraying mechanism 200 is used to control the gas jet port 241 of the nozzle 240 to provide a shielding gas for the welding area of the welding head 110 when the welding torch 100 is in the brazing operation; and to control the liquid jet port 242 of the nozzle 240 to provide a cooling liquid for the welding area of the welding head 110 when the welding torch 100 completes the current welding action, so as to cool the welding part of the steel material workpiece in the welding area.

[0078] It can be understood that the shielding gas is sprayed when the welding torch 100 sprays fire, and the welding quality is improved by preventing oxidation of the welding area. When the metal is heated to a high temperature, it is extremely easy to react with oxygen in the air, resulting in oxidation on the workpiece 20 to be welded, and then blackening appears on the workpiece 20 to be welded; among them, oxidation or blackening will hinder the flow and filling of the molten filler metal at the joint, resulting in insufficient welding strength or defects. Therefore, using a shielding gas can effectively isolate the welding area from the outside air, avoid the occurrence of oxidation, ensure that the filler metal can be evenly distributed and fully fill the joint gap, so as to form a firm and reliable connection and improve the brazing quality.

[0079] It is understandable that after brazing is completed, the brazed workpiece needs to be rapidly cooled to fix the structure of the brazed joint. By spraying a cooling liquid onto the workpiece that has just completed brazing, problems such as grain growth or changes in the material properties at the joint caused by the slow natural cooling rate can be avoided. Rapid cooling can also reduce the thermal stress caused by the temperature gradient, which may lead to workpiece deformation or cracks at the joint, affecting the overall structural stability and durability. Also, the cooling gas can limit the oxidation reaction by reducing the time the workpiece is at a high temperature to avoid blackening. Although rapid cooling itself cannot directly prevent the oxidation reaction, it shortens the time the metal is exposed to the temperature and environment that may cause oxidation, thereby reducing the probability and thickness of the formation of the oxide layer, which helps to improve the brazing quality.

[0080] It should also be noted that after the workpiece 20 to be welded is heated and the molten filler metal solidifies to form a weld seam, the spraying mechanism 200 sprays clean cooling water onto the workpiece 20 to be welded. The flux on the weld surface, the brazed seam, and the pipe fittings, etc. are rapidly cooled under the coverage of normal-temperature cooling water. Due to the large difference in the expansion coefficients of the residual flux, the filler metal, and the steel, the residual flux will rapidly contract and peel off from the filler metal and the steel base material. Under the action of the sprayed water, it will automatically fall off, thus achieving the purpose of removing the residual flux. After the residual flux falls off, the automatic air-blowing mechanism uses high-pressure dry air to blow the workpiece 20 to be welded and the nearby area to blow away the residual flux and moisture on the surface, etc., so as to ensure that the weld seam and the nearby area of the workpiece 20 to be welded are clean and free of impurities.

[0081] Optionally, during the brazing process, the spraying mechanism 200 sprays an inert gas to avoid oxidation of the workpiece 20 to be welded. However, in some transition periods or transition processes after heating is completed, the gas jet port 241 changes from spraying an inert gas to spraying a gas flux. The gas flux is transported to the welding area with nitrogen as the carrier. Once it reaches the welding area and burns at a high temperature, the gas flux will generate a protective flame or other forms of protective layer. This protective layer effectively isolates the oxygen in the outside air and prevents it from contacting the steel pipe fittings and the weld seam, thereby avoiding oxidation of the base material and the weld seam. In this way, the risk of oxidation is reduced and the welding quality is improved.

[0082] It should be noted that each welding head 110 corresponds to at least one nozzle 240, and the two work in cooperation. That is, no matter how the welding head 110 is arranged, the corresponding welding area can be guaranteed by both the protective gas and the cooling liquid provided by the spraying mechanism 200. In this way, the brazing quality of the brazing device 10 can be greatly improved. Optionally, the welding head 110 and the nozzle 240 face the same position of the workpiece 20 to be welded.

[0083] Optionally, as Figure 1 and Figure 2As shown, the soldering head 110 and the spray head 240 are correspondingly arranged. When the soldering gun 100 and the spraying mechanism 200 move, the two are always in a correspondingly arranged state, so as to ensure the stability of the structure.

[0084] It can be understood that the working process of the brazing device 10 is as follows. After determining the workpiece 20 to be brazed, control the movement of the brazing device 10 so that the workpiece 20 to be brazed is relatively displaced into the brazing area of the brazing device 10, and multiple soldering heads 110 and multiple spray heads 240 are all oriented towards this brazing area. After determining the position, control the brazing device 10 to move up and down repeatedly so that the flame is evenly sprayed onto the workpiece 20 to be brazed, improving the brazing quality.

[0085] Therefore, the brazing device 10 in the present invention includes a soldering gun 100 and a spraying mechanism 200. The soldering gun 100 is used for brazing the target workpiece. The spray head 240 of the spraying mechanism 200 includes a gas jet port 241 and a liquid jet port 242. The gas jet port 241 is used to work synchronously with the soldering gun 100 to spray a protective gas when the soldering head 110 sprays fire, and this protective gas can prevent the workpiece 20 to be brazed from being oxidized at high temperature. The liquid jet port 242 is used to spray a cooling liquid onto the workpiece after the soldering gun 100 finishes working, that is, after the workpiece is brazed. In this way, the cooling speed of the workpiece can be accelerated, and the negative impacts brought by overheating of the workpiece, such as oxidation and material deterioration, can be effectively avoided.

[0086] In summary, in the current situation where copper materials are scarce and the market considers the prospect of steel replacing copper, the brazing device 10 in the present invention can effectively solve the problem that steel material workpieces are prone to oxidation compared with copper material workpieces during brazing, and has better brazing quality.

[0087] In an embodiment, as Figure 5 shown, the soldering gun 100 includes a first main body section 120 and a first brazing section 130. Multiple soldering heads 110 are spaced on the first brazing section 130 and are oriented towards the same area; the first main body section 120 is connected and communicated with the first brazing section 130, and the first main body section 120 is used for supplying brazing fuel to the first brazing section 130.

[0088] In this embodiment, one end of the first main body section 120 is configured with an interface for accessing brazing fuel required for brazing, such as gaseous or liquid fuel, ensuring that the brazing fuel can smoothly enter the first main body section 120 of the soldering torch 100. The other end of the first main body section 120 is connected to the first brazing section 130, maintaining both a physically stable connection and an unobstructed internal passage therebetween, thereby achieving the purpose of transferring the brazing fuel from the first main body section 120 to the first brazing section 130. Optionally, the connection between the first main body section 120 and the second main body section 171 is designed to be sealed, effectively preventing the risk of brazing fuel leakage. In addition, a plurality of welding heads 110 are spaced apart on the first brazing section 130, and all the welding heads 110 face the same brazing area to concentrate heat, improve the brazing efficiency and quality, and can also reduce the size of the heat-affected zone and enhance the performance of the welded joint by means of simultaneous multi-point heating.

[0089] As Figure 3 and Figure 4 shown in the existing brazing device Figure 3 In it, for the solder joints of small-diameter pipes, a single-head soldering torch is used for heating and welding. Due to the limited direct heating range of the single-head soldering torch flame, when the employee performs manual welding and heating, it is necessary to use a left-right and up-down swinging method to heat the weld seam to make up for problems such as uneven heating caused by the structural limitations of the single-head soldering torch. Figure 4 In it, for the solder joints of large-diameter pipes, a double-head soldering torch is used for heating and welding. For large diameters, due to the limited direct heating range of the double-head soldering torch flame, when the employee performs manual welding and heating, it is necessary to use a left-right and up-down swinging method to heat the weld seam to make up for problems such as uneven heating caused by the structural limitations of the double-head soldering torch.

[0090] However, in this embodiment, the first main body section 120 can be connected to a movable bracket, and the movable bracket can drive the first brazing section 130 to move with the first main body section 120, so that the workpiece 20 to be welded reaches the brazing area between the plurality of welding heads 110. After the workpiece is in place, the plurality of welding heads 110 can be turned on to achieve uniform heating of the weld seam. In this way, the problem of limited heating range of the traditional single-head or double-head soldering torch 100 is overcome, and the operation instability and uneven heating caused by manual swinging are avoided.

[0091] In one embodiment, the first brazing section 130 is arranged in an open ring shape or a closed ring shape, and a plurality of the welding heads 110 are spaced apart along the extending direction of the first brazing section 130.

[0092] In a feasible embodiment, the first brazing section 130 is arranged in a closed loop, which is suitable for application scenarios where the workpiece needs to be heated evenly in all directions. A plurality of welding heads 110 are arranged at intervals along the extending direction of the closed-loop first brazing section 130, and the plurality of welding heads 110 all face the same area at the center of the loop. When the workpiece to be welded 20 is located within this area, by turning on all the welding heads 110, comprehensive and uniform heating of the weld seam can be achieved. The closed-loop design ensures that heat can be concentrated on the welding point from all directions, greatly improving the welding quality and efficiency.

[0093] In a feasible embodiment, as Figures 5 to 9 shown, the first brazing section 130 is arranged in an open loop; considering that some workpieces to be welded 20 have a curved shape or specific space limitations, resulting in the inability to place the workpiece to be welded 20 into the brazing area from top to bottom, the first brazing section 130 is designed as an open-loop structure, enabling the first brazing section 130 to move relative to the workpiece to be welded 20 from the side of the workpiece to be welded 20 through the opening to the brazing area. The open-loop first brazing section 130 also has a plurality of welding heads 110 arranged at intervals along its extending direction, and the plurality of welding heads 110 also face a common area to form a brazing area. Due to the open design, during use, the position of the workpiece can be controlled by a robotic arm or other positioning devices, and the workpiece to be welded 20 can be accurately placed in the brazing area to avoid collision or interference with the welding torch 100. That is to say, the position of the opening is equivalent to an avoidance area, which can allow the workpiece to be welded 20 to move relative to the brazing area.

[0094] In an embodiment, as Figures 5 to 9 shown, the first brazing section 130 includes a first section 131 and a second section 132. The first end of the first section 131 and the first end of the second section 132 are respectively connected to the first main section 120. The second end of the first section 131 and the second end of the second section 132 are arranged at intervals, and at least one of the welding heads 110 is provided on both the first section 131 and the second section 132.

[0095] In this embodiment, the first end of the first section 131 and the first end of the second section 132 are respectively connected to the first main section 120 to form a bifurcated layout, and the brazing fuel can be split from the first main section 120 to the first section 131 and the second section 132, thereby achieving simultaneous heating of multiple areas.

[0096] It can be understood that, as Figure 5As shown, a certain interval is provided between the second end of the first section 131 and the second end of the second section 132 to accommodate workpieces 20 to be soldered with different sizes or shapes. Here, the distance between the first section 131 and the second section 132 is not limited, and specifically depends on the actual application scenario. If the workpiece 20 to be soldered is thicker, the distance between the first section 131 and the second section 132 is larger, so that the distance between the first section 131 and the second section 132 is adapted to the workpiece 20 to be soldered, facilitating the entry of the workpiece 20 to be soldered into the brazing area.

[0097] It can be understood that at least one welding head 110 is arranged on both the first section 131 and the second section 132. Furthermore, multiple welding heads 110 are distributed along their respective extending directions and face the same welding area. In this way, multiple welding heads 110 can work together to provide a more uniform and efficient heating effect, ultimately improving the brazing quality.

[0098] In one embodiment, as Figure 9 shown, both the first section 131 and the second section 132 are arc-shaped, and the arc length of one of the first section 131 and the second section 132 is greater than that of the other.

[0099] It should be explained that if the first section 131 and the second section 132 are arranged in a straight section manner, when multiple welding heads 110 need to be arranged on the same straight section, it is difficult to accurately align all the welding heads 110 with the workpiece 20 to be soldered, resulting in uneven heating. In this embodiment, both the first section 131 and the second section 132 are arc-shaped, which can better adapt to the shape of the workpiece 20 to be soldered. When surrounding the circumference of the workpiece 20 to be soldered, it can ensure that each welding head 110 accurately faces the workpiece 20 to be soldered, achieving uniform heating. Moreover, the design that the arc length of one of the first section 131 and the second section 132 is greater than that of the other can adapt to different application scenarios to improve its usability. For example, according to the path of the workpiece 20 to be soldered entering the brazing area, the arc lengths of the first section 131 and the second section 132 can be determined to ensure that the size of the avoidance area at the interval between the first section 131 and the second section 132 is adapted to the size of the workpiece 20 to be soldered, and the position of the avoidance area is set on the path of the workpiece 20 to be soldered entering the brazing area. In this way, the usability can be improved.

[0100] In one embodiment, as Figures 5 to 8 shown, the brazing device 10 further includes a flow divider 140, which has a liquid inlet, a first flow dividing port, and a second flow dividing port that are interconnected. The liquid inlet is connected to the first main section 120, the first flow dividing port is connected to the first end of the first section 131, and the second flow dividing port is connected to the first end of the second section 132; the liquid inlet and the first flow dividing port are connected to form a first channel, the liquid inlet and the second flow dividing port are connected to form a second channel, and the first channel and the second channel are used for the flow of the brazing fuel.

[0101] In this embodiment, a first channel is formed between the liquid inlet of the flow divider 140 and the first flow dividing port, and a second channel is formed between the liquid inlet and the second flow dividing port. The first channel and the second channel work together to ensure that the brazing fuel can flow smoothly to the first section 131 and the second section 132. In this way, not only the stability of the brazing fuel supply is ensured, but also the ventilation of one of the first section 131 and the second section 132 can be controlled, or the ventilation of both can be controlled simultaneously. Thus, the adjustability of the system is enhanced, and the fuel flow in the first channel and the second channel can be adjusted according to actual needs to adapt to the welding requirements of workpieces of different sizes and shapes, improving the overall efficiency and quality of the brazing process and having higher flexibility.

[0102] In some exemplary brazing devices, there is no design of a flow divider. Instead, the brazing fuel is directly input into a single inlet and then distributed to multiple welding points, which is likely to cause uneven supply of the brazing fuel, thereby affecting the welding quality. In some cases, in the case of setting in a straight section or single-channel feeding, the welding head far from the brazing fuel inlet may experience insufficient supply of the brazing fuel, resulting in the problem of uneven heating. However, in this embodiment, by introducing the flow divider 140, the distribution of the brazing fuel to the first section 131 and the second section 132 is precisely regulated to ensure that each welding head 110 can obtain sufficient brazing fuel, thereby achieving a more uniform heating effect and also improving the brazing quality and the flexibility of the brazing device 10.

[0103] In this embodiment, as Figure 7 shown, the flow divider 140 further includes a third flow dividing port, and the third flow dividing port is connected to one of the welding heads 110; the liquid inlet and the third flow dividing port are communicated to form a third channel, and the third channel is used for the brazing fuel to flow through. It can be understood that a third channel is formed between the third flow dividing port and the liquid inlet to allow the brazing fuel to pass through. In this way, the brazing work can be carried out more evenly, or it can be adapted to more application scenarios.

[0104] In one embodiment, as Figure 6 and Figure 7 shown, the first section 131 and / or the second section 132 are provided with a plurality of the welding heads 110 evenly spaced apart.

[0105] It can be understood that by arranging a plurality of welding heads 110 on the first section 131 or the second section 132 (or on both sections simultaneously), simultaneous welding operations on a larger area or multiple positions can be achieved, thereby shortening the welding time. In addition, the even spacing distribution between the welding heads 110 can ensure the balance of welding heat and fuel supply, avoiding welding quality problems caused by local overheating or uneven fuel distribution.

[0106] It should be noted that the number of the welding heads 110 on the first section 131 and the second section 132 is not limited herein, and it can be one, two, or multiple, specifically depending on the requirements of the actual application. Among them, when there is one welding head 110 on both the first section 131 and the second section 132, the corresponding two welding heads 110 are arranged on opposite sides of the brazing area for uniform heating to avoid overheating at a single point.

[0107] In one embodiment, as Figure 8 shown, the first section 131 has a plurality of the welding heads 110, and the distribution density of the plurality of the welding heads 110 on the first section 131 gradually increases from the first end to the second end of the first section 131; and / or, the second section 132 has a plurality of the welding heads 110, and the distribution density of the plurality of the welding heads 110 on the second section 132 gradually increases from the first end to the second end of the second section 132. In this embodiment, the distribution density of the welding heads 110 gradually increases from the first end to the second end of each section, that is, the number of the welding heads 110 increases from the first end to the second end. The first end is the end connected to the first main section 120, and the second end is the end far from the first main section 120. In this way, due to the spaced arrangement between the second end of the first section 131 and the second end of the second section 132, there is no welding head 110 at the detection location between the two, resulting in uneven welding. By increasing the density of the welding heads 110, the overall welding uniformity and strength are enhanced, thereby improving the brazing quality.

[0108] In one embodiment, the first brazing section 130 is arranged in an open ring shape, and the nozzles of the plurality of the welding heads 110 face the annular central area of the first brazing section 130. The design of the open ring facilitates the installation and positioning of the workpiece 20 to be welded. In addition, the welding heads 110 facing the annular central area (welding area) can ensure the concentrated supply of heat and materials during the welding process, enabling the welding area to obtain a more uniform heat distribution and more efficient filler metal filling, thereby improving the overall welding quality and efficiency.

[0109] In one embodiment, as Figure 9 and Figure 10 shown, one end of the first brazing section 130 is connected to the first main section 120, and the other end is suspended. In this embodiment, the entire structure of the first brazing section 130 is not composed of multiple independent paragraphs (such as the first section 131 and the second section 132), but a continuous whole. Setting one end of the first brazing section 130 to be suspended, that is, the first brazing section 130 is not a closed ring but an open ring, so as to form an avoidance area for the brazing workpiece to enter the brazing area. It can be understood that the integral design reduces the interfaces between different components, helps to improve the overall strength and stability of the structure, and at the same time reduces the quality risk caused by improper connection or poor contact.

[0110] In one embodiment, as Figure 11 and Figure 12 shown, the welding torch 100 has a first welding head assembly 150, a second welding head assembly 160, and a driving assembly. The driving assembly is respectively drivingly connected to the first welding head assembly 150 and the second welding head assembly 160. The first welding head assembly 150 and the second welding head assembly 160 have a first relative position and a second relative position. When the first welding head assembly 150 and the second welding head assembly 160 are in the first relative position, the first welding head assembly 150 and the second welding head assembly 160 are spaced apart by a first distance. When the first welding head assembly 150 and the second welding head assembly 160 are in the second relative position, the first welding head assembly 150 and the second welding head assembly 160 are spaced apart by a second distance. The first distance is greater than the second distance. The driving assembly is used to drive the first welding head assembly 150 and the second welding head assembly 160 to switch between the first relative position and the second relative position.

[0111] It can be understood that the "relative" in the first relative position and the second relative position specifically refers to the relative position of the first welding head assembly 150 and the second welding head assembly 160. Optionally, the first distance is greater than the diameter of the workpiece 20 to be welded. The second distance can be zero, that is, the first welding head assembly 150 and the second welding head assembly 160 are closed, or slightly greater than zero. In a feasible implementation manner, in the initial stage, according to the size of the workpiece 20 to be welded, as Figure 12 shown, the driving assembly drives the first welding head assembly 150 and the second welding head assembly 160 to adjust to the first relative position, so that the distance (the first distance) between them is greater than the diameter of the workpiece 20 to be welded, so that the workpiece 20 to be welded can enter the brazing area. Subsequently, as Figure 11 shown, the driving assembly drives the first welding head assembly 150 and the second welding head assembly 160 to the second relative position. At this time, the distance between the two sets of welding heads 110 is reduced to zero, so as to facilitate welding. In this way, the welding torch 100 can adapt to different welding requirements and has higher flexibility.

[0112] In this embodiment, the driving assembly can be connected to the first welding head assembly 150, can be connected to the second welding head assembly 160, or can be respectively connected to the first welding head assembly 150 and the second welding head assembly 160. Among them, when the driving assembly is respectively connected to the first welding head assembly 150 and the second welding head assembly 160, it can drive the first welding head assembly 150 and the second welding head assembly 160 respectively, or can drive the first welding head assembly 150 and the second welding head assembly 160 simultaneously.

[0113] In this embodiment, both the first soldering head assembly 150 and the second soldering head assembly 160 include a second main body section 171 and a second brazing section 172; the second main body section 171 is used for inputting brazing fuel into the second brazing section 172, and a plurality of the soldering heads 110 are spaced apart and arranged on the second brazing section 172; the second main body section 171 and the second brazing section 172 are in communication, and the second brazing section 172 is arranged in a curved shape. When the first soldering head assembly 150 and the second soldering head assembly 160 are in the second relative position, the second brazing sections 172 of the first soldering head assembly 150 and the second soldering head assembly 160 enclose an open ring or a closed ring.

[0114] In this embodiment, as Figure 11 and Figure 12 shown, the second brazing section 172 may be an arc section, and the arc lengths of the second brazing sections 172 in the first soldering head assembly 150 and the second soldering head assembly 160 may be different. The arc lengths of the two second brazing sections 172 may be adapted so that when they are in the second relative position, they are in a closed ring state. Of course, in some other embodiments, the second brazing section 172 may also be other shapes, such as a straight line shape, an L shape, or other customized shapes, to adapt to specific welding requirements or improve operation convenience. By changing the shape of the brazing section, the welding path can be optimized, the welding effect can be enhanced, and more types of workpiece forms can be adapted.

[0115] Optionally, the soldering heads 110 are evenly distributed on the second brazing sections 172 in the first soldering head assembly 150 and the second soldering head assembly 160. The number of the soldering heads 110 on each second brazing section 172 is not limited herein and specifically depends on the actual brazing requirements.

[0116] In one embodiment, as Figure 13 shown, the spraying mechanism 200 includes an input pipe section 210 and an output pipe section 220.

[0117] In this embodiment, the input end of the output pipe section 220 is connected to the output end of the input pipe section 210, and the output end of the output pipe section 220 is connected to at least one of the nozzles 240; the input pipe section 210 is used for inputting a protective gas and a cooling liquid into the output pipe section 220, and the output pipe section 220 sprays the protective gas and the cooling liquid through the nozzles 240.

[0118] It can be understood that the input end of the output pipe section 220 is connected to the output end of the input pipe section 210 to form a continuous conveying channel. The input pipe section 210 is used for transporting the protective gas and the cooling liquid to the output pipe section 220, and the output end of the output pipe section 220 is connected to at least one nozzle 240 for spraying the protective gas and the cooling liquid onto the brazing area.

[0119] It should be noted that the number of nozzles 240 on the output pipe section 220 is the same as the number of welding heads 110 on the welding torch 100, and the nozzles 240 and the welding heads 110 are arranged in one-to-one correspondence. This ensures that each welding head 110 can obtain an independent supply of shielding gas and cooling liquid during operation, thus optimizing the welding effect to the greatest extent. Through the one-to-one correspondence relationship, the gas protection environment and cooling efficiency around each welding head 110 can be precisely controlled, avoiding welding quality problems caused by uneven resource distribution. In addition, this design also improves the controllability and flexibility of the system, enabling each welding head 110 to adjust the parameters of its corresponding nozzle 240 (such as gas flow or coolant volume) according to specific welding requirements to meet the requirements of different workpiece materials or welding scenarios. In this way, the brazing quality can be effectively improved.

[0120] In one embodiment, as Figure 14 and Figure 15 shown, the number of the output pipe sections 220 is multiple; the injection mechanism 200 further includes a shunt pipe section 230, the shunt pipe section 230 has a plurality of shunt ports corresponding to the number of the output pipe sections 220, the input end of the shunt pipe section 230 is connected to the output end of the input pipe section 210, and the plurality of shunt ports of the shunt pipe section 230 are connected to the plurality of output pipe sections 220 in one-to-one correspondence.

[0121] In this embodiment, the number of the output pipe sections 220 is multiple, and each output pipe section 220 is used to supply shielding gas or cooling liquid to the corresponding nozzle 240. In order to realize the distribution and management of the multiple output pipe sections 220, the injection mechanism 200 introduces a shunt pipe section 230. The shunt pipe section 230 can evenly shunt the shielding gas and cooling liquid conveyed by the input pipe section 210 to each output pipe section 220. The shunt pipe section 230 has a plurality of shunt ports corresponding to the number of the output pipe sections 220, and each shunt port is connected to an output pipe section 220 in one-to-one correspondence, so as to ensure that each output pipe section 220 can obtain the supply. In this way, in the scenario of multi-point welding, each welding head 110 and its corresponding nozzle 240 can operate independently without performance degradation caused by uneven resource distribution. In addition, through the centralized management and distribution of the shunt pipe section 230, the system structure is simplified, the maintenance difficulty is reduced, and the feeding consistency between the output pipe sections 220 is ensured.

[0122] It should be noted in particular that several embodiments of the injection mechanism 200 are given above. The injection mechanism 200 has an output pipe section 220 and an input pipe section 210. However, the soldering gun 100 has a first main body section 120 and a first soldering section 130, or a second main body section 171 and a second soldering section 172. In the above embodiments, the structures of the output pipe section 220 and the input pipe section 210 are different from those of the first main body section 120 and the first soldering section 130, and the structures of the output pipe section 220 and the input pipe section 210 are also different from those of the second main body section 171 and the second soldering section 172. However, in other embodiments, the structures of the output pipe section 220 and the input pipe section 210 may be the same as those of the first main body section 120 and the first soldering section 130, and the structures of the output pipe section 220 and the input pipe section 210 may also be the same as those of the second main body section 171 and the second soldering section 172. Specific details are not limited herein.

[0123] In this embodiment, as Figure 14 and Figure 15 shown, an outlet 240 is connected to the output end of each of the output pipe sections 220; the spraying area of each of the outlets 240 partially overlaps with the welding area of the welding head 110. It can be understood that the spraying area partially overlaps with the welding area, that is to say, the orientations of the outlet 240 and the welding head 110 do not necessarily need to be exactly the same or directly aligned. The key lies in ensuring that the sprayed protective gas or cooling liquid can cover a partial range of the welding area, rather than requiring the outlet 240 to directly face the working direction of the welding head 110. In this way, the angle and position of the outlet 240 can be adjusted according to the actual welding requirements to achieve the best process effect. For example, in some cases, it may be necessary to slightly deviate the outlet 240 from the welding head 110 in order to better utilize the physical space or optimize according to the specific shape of the workpiece, improving the flexibility of the operation.

[0124] In one embodiment, the gas jet orifice 241 and the liquid jet orifice 242 are arranged to extend in a first direction, and the gas jet orifice 241 and the liquid jet orifice 242 are arranged at intervals in a second direction, and the first direction intersects with the second direction. In this embodiment, the first direction is the horizontal direction, and the gas jet orifice 241 and the liquid jet orifice 242 are respectively arranged on the outlet 240 along the horizontal direction, that is to say, the gas jet orifice 241 and the liquid jet orifice 242 extend along the horizontal direction, and the gas jet orifice 241 and the liquid jet orifice 242 are horizontally arranged. The second direction can intersect and be perpendicular to the first direction, that is, the second direction is the vertical direction, and the gas jet orifice 241 and the liquid jet orifice 242 are arranged at intervals in the vertical direction to form two rows, one row being the gas jet orifice 241 and the other row being the liquid jet orifice 242.

[0125] In this embodiment, a plurality of air jets are provided on the air jet port 241, and the plurality of air jets are arranged to extend in the first direction; a plurality of liquid jets are provided on the liquid jet port 242, and the plurality of liquid jets are arranged to extend in the first direction. It can be understood that a plurality of air jets are provided on the air jet port 241, and the air jets are arranged to extend in the first direction (horizontal direction), ensuring that the shielding gas can be evenly distributed in the welding area. Similarly, a plurality of liquid jets are provided on the liquid jet port 242, and the liquid jets also extend in the first direction (horizontal direction) to ensure that the cooling liquid can evenly cover the parts that need to be cooled down.

[0126] In this embodiment, the shielding gas can be an inert gas such as nitrogen, nitrogen-hydrogen mixed gas, and argon. The specific type of the shielding gas is not limited herein. What is important is that it can protect the surface of the workpiece 20 to be welded during heating and prevent the workpiece 20 to be welded from turning black and oxidizing at high temperatures. It can be understood that nitrogen and nitrogen-hydrogen mixed gas, as common inert gases, do not chemically react with metals at high temperatures. By spraying nitrogen into the welding area, a protective layer can be formed on the surface of the workpiece 20 to be welded, effectively isolating the oxygen in the air and preventing it from coming into contact with the surface of the workpiece 20 to be welded and triggering an oxidation reaction. This can keep the surface of the workpiece 20 to be welded clean and bright and prevent blackening caused by high temperatures.

[0127] In this embodiment, the liquid jet port 242 can spray normal-temperature clean misty cooling water or small-flow cooling water. After the brazing heating of the workpiece 20 to be welded is completed, the device automatically sprays water to cool the weld and the nearby area of the workpiece 20 with cooling water. It can be understood that after the brazing heating of the workpiece 20 to be welded is completed, the brazing device 10 will automatically spray normal-temperature clean misty cooling water or small-flow cooling water through the liquid jet port 242 to quickly cool the weld and the nearby area of the workpiece 20 to be welded and prevent material deformation or other adverse effects caused by high temperatures. Using misty water can increase the contact area with the workpiece, improve the cooling efficiency, and at the same time reduce the impact on the welding quality. The small-flow cooling water helps to control the cooling rate and avoid defects such as cracks caused by too fast cooling rate to certain materials.

[0128] In this embodiment, the air jet port 241 can be connected to dry compressed air to blow off the moisture and debris on the surface of the workpiece 20 after welding. This helps to remove the surface moisture, prevent rust, and can also remove impurities that may affect subsequent processing or use.

[0129] In one embodiment, the brazing device 10 further includes a movable bracket, which is not shown in the figure.

[0130] In this embodiment, the welding torch 100 and the spraying mechanism 200 are arranged on the movable bracket, and the movable bracket is used to drive the welding torch 100 and the spraying mechanism 200 during movement. The movable bracket drives the welding torch 100 and the spraying mechanism 200 by moving, so that the workpiece 20 to be welded is relatively moved into the welding area in the welding torch 100 and the spraying mechanism 200. In this way, the positions and angles of the welding torch 100 and the spraying mechanism 200 can be adjusted according to the shape and size of the workpiece, and automated or semi-automated control is also supported to meet the requirements of complex welding tasks.

[0131] Among them, the movable bracket, as a robotic arm, can be manually controlled to move the movable bracket to drive the welding torch 100 and the spraying mechanism 200 to move, or the movement of the movable bracket can be mechanically and automatically controlled to drive the welding torch 100 and the spraying mechanism 200 to move.

[0132] Optionally, through the movable bracket, the welding torch 100 and the spraying mechanism 200 can be controlled to move in multiple directions, including lateral movement and vertical movement, so that they can move in a three-dimensional space and have high flexibility.

[0133] The present invention also provides a brazing system, and the brazing system includes the brazing device 10 described in any one of the above. It should be noted that the specific structure of the brazing device 10 refers to the above-mentioned embodiment. Since this brazing system adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated here one by one.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A brazing device (10), characterized in that, The brazing device is used for brazing a steel material workpiece. The brazing device (10) includes: A welding torch (100) having a plurality of welding heads (110); and An injection mechanism (200) having a plurality of nozzles (240). Each nozzle (240) has a gas jet orifice (241) and a liquid jet orifice (242); each welding head (110) is correspondingly arranged with at least one nozzle (240); The injection mechanism (200) is configured to control the gas jet orifice (241) of the nozzle (240) to provide a shielding gas for the welding area of the welding head (110) when the welding torch (100) is in the brazing operation; and to control the liquid jet orifice (242) of the nozzle (240) to provide a cooling liquid for the welding area of the welding head (110) when the welding torch (100) completes the current welding action, so as to cool the welded part of the steel material workpiece in the welding area.

2. The brazing device (10) according to claim 1, characterized in that, The welding torch (100) includes a first main body section (120) and a first brazing section (130). A plurality of welding heads (110) are spaced apart on the first brazing section (130) and face the same area; the first main body section (120) is connected and communicated with the first brazing section (130), and the first main body section (120) is configured to supply brazing fuel to the first brazing section (130).

3. The brazing device (10) according to claim 2, characterized in that, The first brazing section (130) is arranged in an open ring shape or a closed ring shape, and a plurality of welding heads (110) are spaced apart along the extending direction of the first brazing section (130).

4. The brazing device (10) according to claim 3, characterized in that, The first brazing section (130) includes a first section (131) and a second section (132). The first end of the first section (131) and the first end of the second section (132) are respectively connected to the first main body section (120), the second end of the first section (131) and the second end of the second section (132) are spaced apart, and at least one welding head (110) is provided on both the first section (131) and the second section (132).

5. The brazing device (10) according to claim 4, characterized in that, Both the first section (131) and the second section (132) are arc-shaped, and the arc length of one of the first section (131) and the second section (132) is greater than that of the other.

6. The brazing apparatus (10) according to claim 4, characterized in that, It further includes a flow divider (140) having a liquid inlet, a first flow dividing port and a second flow dividing port that are communicated with each other. The liquid inlet is connected to the first main body section (120), the first flow dividing port is connected to the first end of the first section (131), and the second flow dividing port is connected to the first end of the second section (132); The liquid inlet and the first flow dividing port are communicated to form a first channel, the liquid inlet and the second flow dividing port are communicated to form a second channel, and the first channel and the second channel are configured to allow the brazing fuel to flow through.

7. The brazing device (10) according to claim 6, characterized in that, The flow divider (140) further includes a third flow dividing port that is connected to one welding head (110); The liquid inlet and the third flow dividing port are communicated to form a third channel, and the third channel is configured to allow the brazing fuel to flow through.

8. The brazing device (10) according to claim 4, characterized in that, A plurality of the welding heads (110) are evenly spaced on the first section (131) and / or the second section (132).

9. The brazing device (10) according to claim 8, characterized in that, A plurality of the welding heads (110) are provided on the first section (131), and the distribution density of the plurality of the welding heads (110) on the first section (131) gradually increases from the first end to the second end of the first section (131); and / or, A plurality of the welding heads (110) are provided on the second section (132), and the distribution density of the plurality of the welding heads (110) on the second section (132) gradually increases from the first end to the second end of the second section (132).

10. The brazing device (10) according to claim 8, characterized in that, The first brazing section (130) is arranged in an open ring shape, and the nozzles of the plurality of the welding heads (110) face the annular central area of the first brazing section (130).

11. The brazing device (10) according to claim 1, characterized in that, The welding torch (100) has a first welding head assembly (150), a second welding head assembly (160) and a driving assembly, and the driving assembly is respectively drivingly connected to the first welding head assembly (150) and the second welding head assembly (160); The first welding head assembly (150) and the second welding head assembly (160) have a first relative position and a second relative position. When the first welding head assembly (150) and the second welding head assembly (160) are in the first relative position, the first welding head assembly (150) and the second welding head assembly (160) are spaced apart by a first distance. When the first welding head assembly (150) and the second welding head assembly (160) are in the second relative position, the first welding head assembly (150) and the second welding head assembly (160) are spaced apart by a second distance, and the first distance is greater than the second distance; The driving assembly is used to drive the first welding head assembly (150) and the second welding head assembly (160) to switch between the first relative position and the second relative position.

12. The brazing apparatus (10) according to claim 11, characterized in that, Both the first welding head assembly (150) and the second welding head assembly (160) include a second main body section (171) and a second brazing section (172); the second main body section (171) is used for inputting brazing fuel to the second brazing section (172), and a plurality of the welding heads (110) are spaced on the second brazing section (172); The second main body section (171) and the second brazing section (172) are communicated, and the second brazing section (172) is arranged in a bent shape. When the first welding head assembly (150) and the second welding head assembly (160) are in the second relative position, the second brazing sections (172) of the first welding head assembly (150) and the second welding head assembly (160) enclose an open ring or a closed ring.

13. The brazing device (10) according to any one of claims 1 to 12, characterized in that, The spraying mechanism (200) includes: An input pipe section (210); An output pipe section (220), the input end of the output pipe section (220) is connected to the output end of the input pipe section (210), and the output end of the output pipe section (220) is connected to at least one of the nozzles (240); The input pipe section (210) is used for supplying a protective gas and a cooling liquid to the output pipe section (220), and the output pipe section (220) ejects the protective gas and the cooling liquid through the nozzle (240).

14. The brazing device (10) according to claim 13, characterized in that, The number of the output pipe sections (220) is multiple; The ejection mechanism (200) further includes a shunt pipe section (230). The shunt pipe section (230) has a plurality of shunt ports corresponding to the number of the output pipe sections (220). The input end of the shunt pipe section (230) is connected to the output end of the input pipe section (210), and the plurality of shunt ports of the shunt pipe section (230) are respectively connected to the plurality of output pipe sections (220) in one-to-one correspondence.

15. The brazing device (10) according to claim 14, characterized in that, One nozzle (240) is connected to the output end of each output pipe section (220); The ejection area of each nozzle (240) partially overlaps with the welding area of the welding head (110).

16. The brazing device (10) according to any one of claims 1 to 12, characterized in that, The gas ejection port (241) and the liquid ejection port (242) are arranged to extend along a first direction, the gas ejection port (241) and the liquid ejection port (242) are arranged at intervals along a second direction, and the first direction intersects with the second direction.

17. The brazing device (10) according to claim 16, characterized in that, A plurality of gas ejection holes are provided on the gas ejection port (241), and the plurality of gas ejection holes are arranged to extend along the first direction; A plurality of liquid ejection holes are provided on the liquid ejection port (242), and the plurality of liquid ejection holes are arranged to extend along the first direction.

18. The brazing apparatus (10) according to claim 1, characterized in that, The brazing device (10) further includes a movable bracket. The welding torch (100) and the ejection mechanism (200) are arranged on the movable bracket, and the movable bracket is used for driving the welding torch (100) and the ejection mechanism (200) when moving.

19. A brazing system, characterized in that, The brazing system includes the brazing device (10) according to any one of claims 1 to 18.

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