Cooling device of electric welding machine and using method of cooling device

Abstract

The invention discloses a cooling device of an electric welding machine and a using method of the cooling device, relates to the field of welding, and solves the problems that when an existing cooling device of the electric welding machine is used, the position of a nozzle is difficult to switch for use, and the service life of a welding gun is difficult to prolong. The welding gun is fixedly connected with a water cooling pipe and a water return pipe, the switching mechanism comprises a rotating disc, nozzles and a conveying part, and the cooling mechanism comprises a spiral pipe and a connecting pipe. When the temperature of one group of nozzles is continuously higher than a set value, the rotating disc is driven to rotate, the positions of the nozzles are switched, and the two groups of nozzles are alternately used; and meanwhile, in the switching process, switching of the position of the welding wire and switching conveying of protective gas can be guaranteed, cooling water in the water cooling pipe is conveyed into the spiral pipe in the running nozzle for water cooling, output water circulates into the other set of spiral pipe through the connecting pipe to conduct heat preservation on the nozzle, and too fast cooling is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of welding, in particular to a cooling device of an electric welding machine and a use method thereof. Background Art

[0002] The electric welder uses the high-temperature arc generated when the positive and negative poles are short-circuited to melt the solder on the welding rod and the material to be welded, so that the contacted objects are combined. Its structure is equivalent to a high-power transformer. It uses the principle of inductance. The inductance will produce a huge voltage change when it is connected and disconnected, thus generating an instantaneous high-voltage arc when short-circuited. When the electric welder is running, the welding gun, connecting wires and the inside of the electric welder need to be cooled. The most commonly used method is to use the welding machine cooling circulating water tank for water cooling and heat dissipation.

[0003] Most existing electric welding machines use a group of welding guns for continuous welding operations. The cooling water flowing out of the cooling circulation water tank passes through the welding gun and the connecting line, taking away a large amount of heat energy. The heat is directly transported to the cooling circulation water tank with the cooling water for heat dissipation circulation, resulting in serious energy loss. In addition, when the welding gun is used for a long time for high-temperature welding, its service life and welding accuracy will be reduced. It is difficult to achieve sufficient cooling only through water cooling. When the welding gun is used in a cold space, the temperature will increase rapidly during use, and the temperature will drop sharply when it is no longer used. Such intermittent use will cause the temperature at the head of the welding gun to change drastically, affecting the service life of the product. Summary of the invention

[0004] The object of the present invention is to provide a cooling device for an electric welding machine and a method of using the same, which are convenient for improving cooling efficiency and extending the service life of the equipment, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cooling device for an electric welding machine, comprising a cooling water tank, a switching mechanism, a cooling mechanism and a welding gun, wherein the welding gun is fixedly connected with a water cooling pipe and a return pipe connected with the cooling water tank, the switching mechanism comprises a fixed disk installed on the welding gun, a rotating disk is rotatably connected with the side of the fixed disk, two groups of nozzles are arranged on the rotating disk, and a conveying member for conveying welding wire and shielding gas respectively is arranged inside the nozzle, which is used to drive the rotating disk to rotate and switch the position of the nozzle when the use temperature of one group of nozzles is continuously higher than the set value within a set time period, so that the two groups of nozzles are used alternately, and at the same time, it can be ensured in the switching process The switching of welding wire position and the switching delivery of shielding gas, the cooling mechanism comprises two groups of spiral tubes respectively fixedly mounted inside the nozzles on both sides, a connecting tube for connecting the two groups of spiral tubes is fixedly connected in the rotating disk, the water cooling tube can be connected with one end of one group of spiral tubes, the return water pipe can be connected with one end of the other group of spiral tubes, and is used to deliver the cooling water in the water cooling tube to the spiral tube in the running nozzle for water cooling, and circulate the output water through the connecting pipe to the other group of spiral tubes to keep the nozzle warm, so as to avoid the nozzle in the non-working state from cooling down too quickly and affecting the service life, so as to improve the cooling efficiency and extend the service life of the equipment.

[0006] Preferably, the conveying member includes two groups of fixed cylinders fixedly mounted on the rotating disk, a plurality of exhaust pipes for discharging shielding gas are provided in the fixed cylinders, the nozzle is movably sleeved with the outer wall of the fixed cylinder, a conductive nozzle is threadedly connected to one end of the fixed cylinder, the welding wire passes through the conductive nozzle and the fixed cylinder, and is movably connected to the conductive nozzle and the inner wall of the fixed cylinder, a wire feeding member for conveying the welding wire is provided in the welding gun, and a gas delivery member for conveying the shielding gas is provided in the welding gun, so as to facilitate the conveying of the welding wire and the shielding gas respectively.

[0007] Preferably, the gas delivery member includes a fixed tube fixedly mounted on the fixed plate, a docking block is slidably connected in the fixed tube, a docking tube capable of being plugged and connected with one end of the fixed cylinder is fixedly connected to the side of the docking block, a fixed ring is fixedly connected in the fixed tube, a return spring fixedly connected to the side of the docking block is fixedly connected on the fixed ring, a gas delivery member for inputting shielding gas is provided in the welding gun, and the switching mechanism is used to control the docking state of the docking tube and the fixed cylinder to facilitate the delivery of shielding gas.

[0008] Preferably, the gas delivery component includes a gas pipe fixedly installed in the welding gun and used for inputting shielding gas, the gas pipe passes through the fixing ring and is fixedly connected to the fixing ring, a first pipeline slidably connected to the outer wall of the gas pipe is opened in the docking block, one end of the first pipeline is connected to the docking pipe, so as to facilitate the input of shielding gas.

[0009] Preferably, the switching mechanism includes a first motor fixedly installed in the welding gun, the output end of the first motor is coaxially fixedly connected with a winding shaft, the outer wall of the winding shaft is fixedly connected with a wire rope, the wire rope passes through the fixing ring and is slidably connected to the inner wall of the fixing ring, the end of the wire rope away from the winding shaft is fixedly connected to the docking block, and a rotating part for driving the rotating disk to rotate and limit the position is provided in the welding gun, so that when the use temperature of one group of the nozzles is continuously higher than the set value within a set time period, the rotating disk is driven to rotate, the position of the nozzle is switched, and the two groups of nozzles are used alternately.

[0010] Preferably, the cooling mechanism also includes two groups of second pipes fixedly mounted on the rotating disk, one end of the spiral tube can be connected and plugged with one group of the second pipes, and the other end can be connected and plugged with one end of the connecting pipe, a temperature sensor is fixedly connected to the connecting pipe, the water-cooling pipe and the return pipe can be respectively connected with the second pipes on both sides, one end of the water-cooling pipe and the return pipe passes through the fixed disk and slides in contact with one side of the rotating disk, and a fixing part for fixing the nozzle is provided on the rotating disk, so as to facilitate the transportation of cooling water in the water-cooling pipe to the spiral tube in the running nozzle for water cooling, and circulate the output water through the connecting pipe to the other group of the spiral tubes to keep the nozzle warm, so as to avoid the nozzle in a non-working state from cooling down too quickly and affecting its service life.

[0011] Preferably, the wire feeding component includes a wire reel installed in the welding gun for storing welding wire, and a wire feeder for conveying the welding wire to the conductive nozzle is fixedly connected in the fixed tube, and the wire feeder is provided with two sets of driving wheels, and the outer wall of the driving wheel is rollingly connected to the outer wall of the welding wire to facilitate the conveying of the welding wire.

[0012] Preferably, the fixing part includes two groups of threaded rings fixedly mounted on the rotating disk, the outer wall of one end of the nozzle is provided with a limit block plugged into the inner wall of the threaded ring, and the outer wall of the nozzle is movably sleeved with a threaded tube that can be threadedly connected to the threaded ring, so as to facilitate fixing of the nozzle.

[0013] Preferably, the rotating part includes a second motor fixedly installed in the welding gun, the output end of the second motor is coaxially fixedly connected with a worm, the rotating disk is coaxially fixedly connected with a driving shaft, the driving shaft passes through the fixed disk and is rotatably connected to the fixed disk, and the driving shaft is fixedly connected with a worm wheel meshing with the worm, so as to drive the rotating disk to rotate and limit the position.

[0014] A method for using a cooling device of an electric welding machine comprises the following steps: S1. Connect the two ends of the water cooling pipe and the return pipe to the welding gun and the cooling water tank respectively, and transport the welding wire and the shielding gas to the inside of the lower nozzle through the conveying member, so that the welding operation can be performed through the lower nozzle; S2. During the welding process, the water cooling pipe transports cooling water to the spiral pipe in the lower nozzle for cooling, and transports the output water to the spiral pipe at the upper position through the connecting pipe to preheat and protect the upper nozzle to prevent the nozzle from cooling too quickly. At the same time, it can also perform preheating treatment to ensure that the nozzle is at a relatively suitable temperature; S3. When the temperature of the lower nozzle is too high, the switching mechanism drives the rotating disk to rotate 180° to switch the positions of the two sets of nozzles. At the same time, the welding wire and the shielding gas are transported to the switched nozzles through the conveying parts for welding. At this time, the cooling water is transported to the lower welding nozzle, and the upper nozzle is protected and preheated by the output warm water.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a cooling device for an electric welder and a method of using the same, which solves the problem that it is difficult to switch the nozzle position when using the cooling device of the existing electric welder, thereby extending the service life of the welding gun. When the use temperature of a group of nozzles is continuously higher than the set value, the rotating disk is driven to rotate and the nozzle position is switched, so that the two groups of nozzles are used alternately. At the same time, the switching of the welding wire position and the switching and delivery of the protective gas can be guaranteed during the switching process. The cooling water in the water-cooling pipe is transported to the spiral pipe in the running nozzle for water cooling, and the output water is circulated to the other group of spiral pipes through the connecting pipe to keep the nozzle warm, so as to avoid the nozzle in the non-working state from cooling too fast and affecting the service life.

[0016] 2. The present invention provides a cooling device for an electric welding machine and a method for using the same. The device has a simple structure and is easy to operate. The device can switch nozzles while ensuring stable delivery of cooling water, shielding gas and welding wire. The switching process is stable and efficient, avoiding the situation where a single nozzle is continuously at high temperature and affects its service life and use efficiency. The temperature of the return water is used to protect and preheat the unused nozzles to avoid rapid cooling and sudden temperature rise and drop that affects its service life. This method of directly switching between two groups of nozzles for alternating use can quickly and efficiently solve the problem of excessive temperature caused by continuous use inside the nozzle, thereby greatly extending the service life of the welding gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 A magnified image of the middle A area; Figure 3 It is a schematic diagram of the internal structure of the welding gun of the present invention; Figure 4 It is a schematic diagram of the local structure of the switching mechanism of the present invention; Figure 5 for Figure 4 Enlarged view of area B; Figure 6 It is a schematic diagram of the local structure of the cooling mechanism of the present invention; Figure 7 for Figure 6 Enlarged view of area C in the middle; Figure 8 It is an exploded view of the local structure of the cooling mechanism of the present invention; Fig. 9 for Figure 8 Enlarged view of area D in the middle.

[0018] In the figure: 1-cooling water tank; 2-welding gun; 3-water cooling pipe; 4-return pipe; 5-switching mechanism; 6-fixed disk; 7-rotating disk; 8-nozzle; 9-transporting member; 10-cooling mechanism; 11-spiral tube; 12-connecting pipe; 13-fixed cylinder; 14-exhaust pipe; 15-conductive nozzle; 16-wire feeding member; 17-air feeding member; 18-fixed pipe; 19-butt block; 20-butt pipe; 21-fixed ring; 22-reset spring; 23-gas delivery parts; 24-gas delivery pipe; 25-first pipeline; 26-first motor; 27-winding reel; 28-wire rope; 29-rotating part; 30-second pipeline; 31-temperature sensor; 32-fixing part; 33-wire reel; 34-wire feeder; 35-driving wheel; 36-threaded ring; 37-limiting block; 38-threaded pipe; 39-second motor; 40-worm; 41-driving shaft; 42-worm wheel; 43-welding wire. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 9 The present invention provides a technical solution: a cooling device for an electric welding machine, comprising a cooling water tank 1, a switching mechanism 5, a cooling mechanism 10 and a welding gun 2, the welding gun 2 is fixedly connected with a water cooling pipe 3 and a return pipe 4 connected with the cooling water tank 1, the switching mechanism 5 comprises a fixed disk 6 installed on the welding gun 2, the side of the fixed disk 6 is rotatably connected with a rotating disk 7, two groups of nozzles 8 are arranged on the rotating disk 7, and a conveying member 9 for conveying welding wire 43 and shielding gas respectively is arranged inside the nozzle 8, which is used to drive the rotating disk 7 to rotate when the use temperature of one group of nozzles 8 is continuously higher than the set value within a set time period, and switch the position of the nozzle 8, so that the two groups of nozzles 8 are used alternately, and at the same time, when switching During the process, the switching of the welding wire 43 position and the switching and delivery of the shielding gas can be guaranteed. The cooling mechanism 10 includes two groups of spiral tubes 11 respectively fixedly installed inside the nozzles 8 on both sides. A connecting pipe 12 for connecting the two groups of spiral tubes 11 is fixedly connected in the rotating disk 7. The water-cooling pipe 3 can be connected to one end of one group of spiral tubes 11, and the return pipe 4 can be connected to one end of the other group of spiral tubes 11. It is used to transport the cooling water in the water-cooling pipe 3 to the spiral tube 11 in the running nozzle 8 for water cooling, and circulate the output water to the other group of spiral tubes 11 through the connecting pipe 12 to keep the nozzle 8 warm, so as to avoid the nozzle 8 in the non-working state from cooling down too quickly and affecting its service life.

[0021] The conveying member 9 includes two groups of fixed cylinders 13 fixedly mounted on the rotating disk 7, a plurality of exhaust pipes 14 for discharging the shielding gas are provided in the fixed cylinder 13, the nozzle 8 is movably sleeved with the outer wall of the fixed cylinder 13, a conductive nozzle 15 is threadedly connected to one end of the fixed cylinder 13, the welding wire 43 passes through the conductive nozzle 15 and the fixed cylinder 13, and is movably connected to the conductive nozzle 15 and the inner wall of the fixed cylinder 13, a wire feeding member 16 for conveying the welding wire 43 is provided in the welding gun 2, and a gas delivery member 17 for conveying the shielding gas is provided in the welding gun 2.

[0022] The gas supply member 17 includes a fixed tube 18 fixedly mounted on the fixed plate 6, a docking block 19 is slidably connected inside the fixed tube 18, a docking tube 20 capable of being plugged and connected with one end of the fixed cylinder 13 is fixedly connected to the side of the docking block 19, a fixed ring 21 is fixedly connected inside the fixed tube 18, a return spring 22 fixedly connected to the side of the docking block 19 is fixedly connected on the fixed ring 21, a gas delivery member 23 for inputting protective gas is provided in the welding gun 2, and the switching mechanism 5 is used to control the docking state of the docking tube 20 and the fixed cylinder 13.

[0023] The gas delivery component 23 includes a gas delivery pipe 24 fixedly installed in the welding gun 2 and used for inputting protective gas. The gas delivery pipe 24 passes through the fixed ring 21 and is fixedly connected to the fixed ring 21. A first pipeline 25 slidably connected to the outer wall of the gas delivery pipe 24 is opened in the docking block 19, and one end of the first pipeline 25 is connected to the docking pipe 20.

[0024] The switching mechanism 5 includes a first motor 26 fixedly installed in the welding gun 2, and the output end of the first motor 26 is coaxially fixedly connected with a winding shaft 27, and the outer wall of the winding shaft 27 is fixedly connected with a wire rope 28, the wire rope 28 passes through the fixed ring 21, and is slidably connected to the inner wall of the fixed ring 21, and one end of the wire rope 28 away from the winding shaft 27 is fixedly connected to the docking block 19, and a rotating member 29 is provided in the welding gun 2 for driving the rotating disk 7 to rotate and limit the position.

[0025] The cooling mechanism 10 also includes two groups of second pipes 30 fixedly mounted on the rotating disk 7. One end of the spiral tube 11 can be connected and plugged with one group of second pipes 30, and the other end can be connected and plugged with one end of the connecting pipe 12. A temperature sensor 31 is fixedly connected to the connecting pipe 12. The water-cooling pipe 3 and the return water pipe 4 can be respectively connected with the second pipes 30 on both sides. One end of the water-cooling pipe 3 and the return water pipe 4 penetrates the fixed disk 6 and slides in contact with one side of the rotating disk 7. A fixing part 32 for fixing the nozzle 8 is provided on the rotating disk 7.

[0026] The wire feeding component 16 includes a wire reel 33 installed in the welding gun 2 and used to store the welding wire 43. A wire feeder 34 for conveying the welding wire 43 to the conductive nozzle 15 is fixedly connected in the fixed tube 18. Two sets of driving wheels 35 are provided on the wire feeder 34. The outer wall of the driving wheel 35 is rollingly connected to the outer wall of the welding wire 43.

[0027] The fixing member 32 includes two sets of threaded rings 36 fixedly mounted on the rotating disk 7. A limit block 37 plugged into the inner wall of the threaded ring 36 is provided on the outer wall of one end of the nozzle 8. A threaded tube 38 that can be threadedly connected to the threaded ring 36 is movably sleeved on the outer wall of the nozzle 8.

[0028] The rotating member 29 includes a second motor 39 fixedly installed in the welding gun 2, and the output end of the second motor 39 is coaxially fixedly connected to a worm 40. A driving shaft 41 is coaxially fixedly connected to the rotating disk 7. The driving shaft 41 passes through the fixed disk 6 and is rotatably connected to the fixed disk 6. A worm wheel 42 meshing with the worm 40 is fixedly connected to the driving shaft 41.

[0029] See also Figure 1-Figure 9 The present invention provides a technical solution: a method for using a cooling device of an electric welding machine, comprising the following steps: S1. The ends of the water cooling pipe 3 and the return pipe 4 are connected to the welding gun 2 and the cooling water tank 1 respectively, and the welding wire 43 and the shielding gas are transported to the inside of the lower nozzle 8 through the conveying member 9, and the welding operation can be performed through the lower nozzle 8; S2. During the welding process, the water cooling pipe 3 delivers cooling water to the spiral pipe 11 in the lower nozzle 8 for cooling, and delivers the output water to the spiral pipe 11 at the upper position through the connecting pipe 12 to preheat and protect the upper nozzle 8 to prevent the nozzle 8 from cooling too quickly. At the same time, it can also perform preheating treatment to ensure that the nozzle 8 is at a relatively suitable temperature; S3. When the temperature of the lower nozzle 8 is too high, the switching mechanism 5 drives the rotating disk 7 to rotate 180° to switch the positions of the two groups of nozzles 8. At the same time, the welding wire 43 and the shielding gas are transported to the switched nozzle 8 through the conveying member 9 for welding. At this time, cooling water is transported to the lower nozzle 8 in the welding state, and the upper nozzle 8 is protected and preheated by the output warm water.

[0030] In this embodiment, the two ends of the water-cooling pipe 3 and the return pipe 4 are respectively connected to the welding gun 2 and the cooling water tank 1, and the two groups of nozzles 8 are respectively plugged into the inner walls of the upper and lower threaded rings 36, so that the two ends of the spiral tube 11 are respectively plugged and connected with the connecting pipe 12 and the second pipe 30. The threaded tube 38 is rotated so that the limit block 37 is limited in the threaded ring 36 to complete the fixation of the nozzle 8. The wire feeder 34 drives the driving wheel 35 to pass the welding wire 43 through the fixing ring 21, the docking block 19, and the fixing cylinder 13 and then transport it to the conductive nozzle 15. At this time, the docking tube 20 is plugged and connected with one end of the lower fixing cylinder 13. The protective gas is output to the nozzle 8 through the gas supply pipe 24, the first pipeline 25, the fixing cylinder 13 and the exhaust pipe 14, and is sprayed from the outer edge of the welding wire 43 to isolate the surrounding air during welding, thereby improving the welding quality.

[0031] During welding, the welding operation is performed through the welding wire 43 in the nozzle 8 at the lower position, and the water-cooling pipe 3 is transported to the lower second pipe 30, and the cold water enters the lower spiral tube 11 to cool the inside of the welded nozzle 8. The warm water after taking away the heat will be output to the connecting pipe 12 through the other end of the spiral tube 11. After detection by the temperature sensor 31, it is determined whether the overall temperature state of the nozzle 8 is normal. The warm water output through the connecting tube 12 enters the upper spiral tube 11 to preheat and keep the upper nozzle 8 warm to prevent the upper nozzle 8 from being too low in temperature. At this time, after the temperature of the warm water is transmitted through the nozzle 8, the preheating temperature is only about 40°, which will not cause excessive heating of the nozzle 8. At the same time, it also prevents the nozzle 8 from cooling too quickly in a low temperature environment, which affects its service life.

[0032] The warm water output through the upper spiral tube 11 enters the second pipe 30 on the upper side, is output to the return pipe 4, is transported to the cooling water tank 1 for cooling, and then enters the water cooling pipe 3 for recycling. In this way, a part of the warm water output from the lower spiral tube 11 can be utilized, and it also has a better protective effect on the use of the nozzle 8.

[0033] When the temperature sensor 31 senses that the water temperature input from the lower side is continuously higher than the set value, the wire feeder 34 and the first motor 26 are first controlled to operate, the driving wheel 35 rotates in the opposite direction to pull the welding wire 43 back into the fixed tube 18, and the first motor 26 drives the winding shaft 27 to rotate and pull the wire rope 28, so that the docking block 19 slides in the opposite direction, and the docking tube 20 slides out of the fixed tube 13, the plug-in state is released, and the reset spring 22 is compressed. Thereafter, the second motor 39 can be controlled to operate, driving the worm 40 to rotate the worm wheel 42, and the worm wheel 42 drives the worm wheel 42 to rotate. The dynamic driving shaft 41 causes the rotating disk 7 to rotate 180°, swapping the positions of the upper and lower groups of nozzles 8. At this time, the second pipe 30 on the upper side rotates to the lower position to connect with the water-cooling pipe 3, and the original second pipe 30 on the lower side rotates to the upper position to connect with one end of the return pipe 4. After the switching is completed, the first motor 26 stops running, the return spring 22 rebounds and pushes the docking tube 20 to be inserted into the fixed tube 13, and the wire feeder 34 again delivers the welding wire 43 to the conductive nozzle 15 at the lower position for subsequent welding operations.

[0034] After the switch, the position of the rotating disk 7 is stable, and the worm gear 42 is driven by the worm 40, so that the driving process is more stable. At the same time, after reaching the specified position, the plug-in limit of the docking tube 20 and the fixed tube 13 is used to ensure the stable delivery of the shielding gas and the stable limit of the position of the rotating disk 7. The device has a simple structure and convenient operation. It can switch the nozzle 8 while ensuring the stable delivery of cooling water, shielding gas and welding wire 43. At the same time, the switching process is stable and efficient, avoiding the situation where a single nozzle 8 continues to be at high temperature and affects its service life and efficiency. The temperature of the return water is used to protect and preheat the nozzle 8 in an unused state, avoiding too fast cooling, sudden temperature rise and drop, and affecting the service life.

[0035] Among them, the wire feeder 34 can control the driving wheel 35 to drive the welding wire 43 to be transported inside the welding gun 2, so that during the welding process, the welding wire 43 can be continuously and uniformly output from the conductive nozzle 15 for welding operation. At the same time, when the nozzle 8 needs to be switched, the driving wheel 35 can be rotated in the opposite direction to drive the welding wire 43 to be retracted.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cooling device for an electric welding machine, characterized in that: include: A cooling water tank (1) and a welding gun (2), wherein the welding gun (2) is fixedly connected with a water cooling pipe (3) and a water return pipe (4) connected to the cooling water tank (1); Also includes: A switching mechanism (5), the switching mechanism (5) comprising a fixed disk (6) mounted on the welding gun (2), the side of the fixed disk (6) being rotatably connected to a rotating disk (7), the rotating disk (7) being provided with two groups of nozzles (8), the nozzles (8) being provided with conveying members (9) for conveying welding wire and shielding gas respectively, and being used to drive the rotating disk (7) to rotate and switch the positions of the nozzles (8) when the use temperature of one group of the nozzles (8) is continuously higher than a set value within a set time period, so that the two groups of the nozzles (8) are used alternately, and at the same time, the switching of the welding wire position and the switching and conveying of the shielding gas can be ensured during the switching process; A cooling mechanism (10), the cooling mechanism (10) comprising two groups of spiral tubes (11) respectively fixedly mounted inside the nozzles (8) on both sides, a connecting tube (12) for connecting the two groups of spiral tubes (11) being fixedly connected inside the rotating disk (7), the water cooling tube (3) being able to communicate with one end of one group of spiral tubes (11), the return pipe (4) being able to communicate with one end of the other group of spiral tubes (11), for water cooling by conveying cooling water in the water cooling tube (3) to the spiral tubes (11) in the nozzles (8) in operation, and circulating the output water through the connecting tube (12) to the other group of spiral tubes (11) to keep the nozzles (8) warm, thereby preventing the nozzles (8) in a non-operating state from cooling too quickly and affecting their service life.

2. A cooling device for an electric welding machine according to claim 1, characterized in that: The conveying member (9) comprises two groups of fixed cylinders (13) fixedly mounted on the rotating disk (7), a plurality of exhaust pipes (14) for discharging shielding gas are provided in the fixed cylinders (13), the nozzle (8) is movably sleeved with the outer wall of the fixed cylinder (13), one end of the fixed cylinder (13) is threadedly connected with a conductive nozzle (15), the welding wire passes through the conductive nozzle (15) and the fixed cylinder (13), and is movably connected with the conductive nozzle (15) and the inner wall of the fixed cylinder (13), the welding gun (2) is provided with a wire feeding member (16) for conveying the welding wire, and the welding gun (2) is provided with a gas feeding member (17) for conveying the shielding gas.

3. A cooling device for an electric welding machine according to claim 2, characterized in that: The gas supply member (17) comprises a fixed tube (18) fixedly mounted on the fixed plate (6); a docking block (19) is slidably connected inside the fixed tube (18); a docking tube (20) capable of being plugged and connected to one end of the fixed cylinder (13) is fixedly connected to the side of the docking block (19); a fixed ring (21) is fixedly connected inside the fixed tube (18); a return spring (22) fixedly connected to the side of the docking block (19) is fixedly connected to the fixed ring (21); a gas supply member (23) for inputting protective gas is provided inside the welding gun (2); and the switching mechanism (5) is used to control the docking state of the docking tube (20) and the fixed cylinder (13).

4. A cooling device for an electric welding machine according to claim 3, characterized in that: The gas delivery member (23) comprises a gas delivery pipe (24) fixedly installed in the welding gun (2) and used for inputting shielding gas, the gas delivery pipe (24) passing through the fixing ring (21) and being fixedly connected to the fixing ring (21), and a first pipeline (25) slidably connected to the outer wall of the gas delivery pipe (24) is provided in the docking block (19), and one end of the first pipeline (25) is connected to the docking pipe (20).

5. A cooling device for an electric welding machine according to claim 3, characterized in that: The switching mechanism (5) comprises a first motor (26) fixedly mounted in the welding gun (2); the output end of the first motor (26) is coaxially fixedly connected to a winding shaft (27); the outer wall of the winding shaft (27) is fixedly connected to a steel wire rope (28); the steel wire rope (28) passes through the fixing ring (21) and is slidably connected to the inner wall of the fixing ring (21); one end of the steel wire rope (28) away from the winding shaft (27) is fixedly connected to the docking block (19); and a rotating member (29) for driving the rotating disk (7) to rotate and limit the position is provided in the welding gun (2).

6. A cooling device for an electric welding machine according to claim 1, characterized in that: The cooling mechanism (10) further comprises two groups of second pipes (30) fixedly mounted on the rotating disk (7); one end of the spiral tube (11) can be connected and plugged with one group of the second pipes (30); the other end can be connected and plugged with one end of the connecting pipe (12); a temperature sensor (31) is fixedly connected to the connecting pipe (12); the water cooling pipe (3) and the water return pipe (4) can be connected to the second pipes (30) on both sides respectively; one end of the water cooling pipe (3) and the water return pipe (4) pass through the fixed disk (6) and are slidably fitted with one side of the rotating disk (7); a fixing member (32) for fixing the nozzle (8) is provided on the rotating disk (7).

7. A cooling device for an electric welding machine according to claim 3, characterized in that: The wire feeding component (16) comprises a welding wire reel (33) installed in the welding gun (2) for storing welding wire, a wire feeder (34) for feeding the welding wire into the conductive nozzle (15) is fixedly connected in the fixed tube (18), and two sets of driving wheels (35) are provided on the wire feeder (34), and the outer wall of the driving wheel (35) is rollingly connected to the outer wall of the welding wire.

8. A cooling device for an electric welding machine according to claim 6, characterized in that: The fixing member (32) comprises two sets of threaded rings (36) fixedly mounted on the rotating disk (7); an outer wall of one end of the nozzle (8) is provided with a limit block (37) plugged into an inner wall of the threaded ring (36); and a threaded tube (38) capable of being threadedly connected to the threaded ring (36) is movably sleeved on the outer wall of the nozzle (8).

9. A cooling device for an electric welding machine according to claim 5, characterized in that: The rotating member (29) comprises a second motor (39) fixedly mounted in the welding gun (2); an output end of the second motor (39) is coaxially fixedly connected to a worm (40); a driving shaft (41) is coaxially fixedly connected to the rotating disk (7); the driving shaft (41) passes through the fixed disk (6) and is rotationally connected to the fixed disk (6); and a worm wheel (42) meshing with the worm (40) is fixedly connected to the driving shaft (41).

10. A method for using a cooling device for an electric welding machine according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Connecting the two ends of the water cooling pipe (3) and the return pipe (4) to the welding gun (2) and the cooling water tank (1), respectively, and conveying the welding wire and the shielding gas to the inside of the lower nozzle (8) through the conveying member (9), so that the welding operation can be performed through the lower nozzle (8); S2. During the welding process, the water cooling pipe (3) transports cooling water to the spiral pipe (11) in the lower nozzle (8) for cooling, and transports the output water to the spiral pipe (11) at the upper position through the connecting pipe (12) to preheat and protect the upper nozzle (8) to prevent the nozzle (8) from cooling too quickly. At the same time, preheating treatment can be performed to ensure that the nozzle (8) is at a relatively suitable temperature; S3. When the temperature of the lower nozzle (8) is too high, the switching mechanism (5) drives the rotating disk (7) to rotate 180 degrees, switching the positions of the two sets of nozzles (8). At the same time, the welding wire and the shielding gas are transported to the switched nozzles (8) through the conveying member (9) to perform welding. At this time, cooling water is transported to the lower nozzle (8) in the welding state, and the upper nozzle (8) is protected and preheated by the output warm water.

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