Double-cooling welding gun

Abstract

The utility model discloses a double-cooling welding gun which comprises a welding gun head, a welding cable connected with the welding gun head and a wire feeding spring located in the welding cable and the welding gun head, the welding gun head comprises a gun shell and a gun neck located in front of the gun shell, and a double-welding-wire contact tube connected with the wire feeding spring is arranged at the front end of the gun neck. A gas insulation pipe and a water insulation pipe connected to the gas insulation pipe in a sleeving mode are installed in the gun neck, a moving space for the wire feeding spring to move is formed in the gas insulation pipe, an air cooling channel is formed between the gas insulation pipe and the water insulation pipe, and a water cooling channel is formed between the water insulation pipe and the inner wall of the gun neck. An air inlet pipe, a water inlet pipe and a water return pipe which are connected to the connector are arranged in the welding cable, so that the cooling effect on the welding gun is improved, and the welding quality is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding torches, and particularly relates to a double-cooling welding torch. Background Art

[0002] Welding, also known as fusion welding, is a manufacturing process and technology for joining metals or other thermoplastic materials by heating at high temperature or high pressure. In recent years, with the development of industries such as construction machinery and shipbuilding, the application of thick plate welding has gradually increased. Therefore, improving the welding efficiency of medium and thick plates is of great significance for enhancing the overall production efficiency. When welding medium and thick plates, the amount of filler metal deposited is often large, the welding time is long, and the total heat input is high, which requires higher requirements for the welding equipment used. Traditional single-wire welding torches can no longer meet the needs of workers' welding operations.

[0003] In large-scale mechanical equipment manufacturing industries, such as shipbuilding and construction machinery industries, during welding work, there are characteristics of many welding workers and long working hours. A large amount of heat is generated at the welding points, which is likely to damage the welded parts or the welding torch. At the production site, air cooling is often used to cool the welding points, but the cooling effect is average and it is difficult to meet the welding cooling requirements. Moreover, the air cooling channel is directly arranged in the wire feeding spring of the welding cable, and gas leakage is likely to occur at the connection between the welding torch head and the welding cable, reducing the cooling effect during welding operations. Summary of the Utility Model

[0004] In view of the above deficiencies, the utility model provides a double-cooling welding torch. Two groups of welding wires are arranged in the wire feeding spring to synchronously convey the two groups of welding wires, realizing double-wire welding to meet the welding operation requirements. An independent air inlet pipe is arranged in the welding cable, and the air inlet pipe is connected to the air cooling channel to prevent gas leakage during the conveying process and affect the air cooling effect of the welding operation. A water cooling channel is also arranged outside the air cooling channel to realize double cooling of the welding torch and improve the cooling effect of the welding torch.

[0005] The utility model is realized through the following technical solutions:

[0006] A double-cooling welding torch includes a welding torch head, a welding cable connecting the welding torch head, and a wire feeding spring located inside the welding cable and the welding torch head. The welding torch head includes a gun shell and a gun neck in front of the gun shell. The front end of the gun neck is provided with a double-wire conductive nozzle connecting the wire feeding spring. An air separation pipe and a water separation pipe sleeved on the air separation pipe are installed inside the gun neck. A moving space for the wire feeding spring to move is provided inside the air separation pipe. An air cooling channel is arranged between the air separation pipe and the water separation pipe. A water cooling channel is arranged between the water separation pipe and the inner wall of the gun neck. A connector is fixedly installed at the end of the gun neck. An air inlet pipe, a water inlet pipe, and a water return pipe connected to the connector are arranged inside the welding cable to improve the cooling effect of the welding torch and ensure the welding quality.

[0007] Further, a waterway converter is installed at the front end of the gun neck. Partition ribs protruding from the outer wall of the riser pipe are connected to the inner wall of the gun neck. The extending direction of the partition ribs is the same as that of the riser pipe. There are two partition ribs located on both sides of the riser pipe respectively. The partition ribs evenly divide the water cooling channel into a water inlet channel and a water return channel. The waterway converter connects the water inlet channel and the water return channel to form a circulating waterway.

[0008] Further, support ribs also protrude from the outer wall of the riser pipe. The extending direction of the support ribs is the same as that of the riser pipe. Along the circumferential direction of the riser pipe, there are multiple support ribs evenly distributed. The support ribs abut against the inner wall of the gun neck. The front end of the support ribs abuts against the waterway converter, and the rear end of the support ribs abuts against the connector, enhancing the stability of the connection between the riser pipe and the gun neck.

[0009] Further, the water inlet pipe is connected to the water inlet channel through a connector to realize the water supply operation for the water inlet channel. The water return pipe is connected to the water return channel through a connector to realize the collection of the water source in the water return channel.

[0010] Further, there are fixing ribs between the gas riser pipe and the riser pipe. The extending direction of the fixing ribs is the same as that of the gas riser pipe. Along the circumferential direction of the gas riser pipe, there are multiple fixing ribs evenly distributed. The fixing ribs are fixedly connected between the gas riser pipe and the riser pipe to enhance the stability of the connection between the gas riser pipe and the riser pipe.

[0011] Further, the air inlet pipe is connected to the air cooling channel through a connector. An air outlet guide is also provided at the front end of the gun neck. The air outlet guide connects the air cooling channel and the air outlet points to the double-wire conductive nozzle, so that the cold air is directed to the double-wire conductive nozzle for transportation, improving the cooling effect.

[0012] Further, the inner wall of the gas riser pipe is coated with a Teflon coating. The Teflon coating has a low friction coefficient and good wear resistance. Coating the inner wall of the gas riser pipe with the Teflon coating helps to reduce the wear of the wire feeding spring on the gas riser pipe and improve the service life of the gas riser pipe.

[0013] Further, a cold air supply pump and a cold water circulation pump are provided at the tail of the welding cable. The air inlet pipe is connected to the cold air supply pump, and both the water inlet pipe and the water return pipe are connected to the cold water circulation pump.

[0014] Further, a nozzle is fixed at the end of the gun neck. The double-wire conductive nozzle is arranged inside the nozzle. The double-wire conductive nozzle adopts an elliptical hole structure, enabling the welding wire to smoothly pass through the double-wire conductive nozzle and ensuring good electrical conductivity of the welding wire. A ceramic transition piece is connected to the rear end of the double-wire conductive nozzle. Two wire holes are opened in the ceramic transition piece, enabling the welding wire to have good directivity when entering the double-wire conductive nozzle.

[0015] The beneficial effects of the present utility model:

[0016] 1. Two sets of welding wires are set in the wire feeding spring to synchronously feed the two sets of welding wires to achieve double-wire welding to meet the welding operation requirements;

[0017] 2. Set up an independent air inlet pipe in the welding cable and connect it to the air cooling channel to prevent the cold air from leaking during the transportation process, which will affect the air cooling effect of the welding operation;

[0018] 3. A water cooling channel is also set outside the air cooling channel to achieve double cooling of the welding gun and improve the cooling effect of the welding gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram for illustrating a schematic implementation of a dual-cooling welding gun in the utility model;

[0020] Figure 2 A schematic structural diagram for illustrating a schematic implementation of a double-cooling welding gun in the utility model in a cut-away state;

[0021] Figure 3 A structural schematic diagram for illustrating another exemplary embodiment of a double-cooling welding gun in a cut-away state in the utility model;

[0022] Figure 4 To illustrate Figure 3 A partial enlarged schematic diagram in the middle;

[0023] Figure 5 A side sectional view for illustrating a schematic embodiment of a dual-cooling welding gun in the utility model;

[0024] Figure 6 A structural schematic diagram for illustrating another exemplary embodiment of a double-cooling welding gun in a cut-away state in the utility model;

[0025] Figure 7 To illustrate Figure 6 A partial enlarged schematic diagram of point B in the middle;

[0026] Figure 8 A structural schematic diagram for illustrating another exemplary embodiment of a double-cooling welding gun in a cut-away state in the utility model;

[0027] Figure 9 To illustrate Figure 8 A partial enlarged schematic diagram of point C in the middle.

[0028] List of parts and reference numerals:

[0029] 1. Welding torch head; 11. Housing; 2. Welding cable; 21. Air inlet pipe; 22. Water inlet pipe; 23. Water return pipe; 3. Wire feeding spring; 4. Double-wire contact tip; 5. Neck of the torch; 51. Air separation pipe; 511. Fixed rib; 52. Water separation pipe; 521. Separation rib; 522. Support rib; 53. Air cooling channel; 54. Water cooling channel; 541. Water inlet channel; 542. Water return channel; 55. Air outlet guide; 6. Connector; 7. Water path converter; 8. Nozzle; 9. Ceramic transition piece. Detailed implementation mode

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] It should be noted that the orientation terms such as left, right, up, down, front, and back in the embodiments of the present invention are only relative concepts to each other or are referenced based on the normal use state of the product, that is, the traveling direction of the product, and should not be considered as restrictive.

[0032] In addition, it should also be noted that the dynamic terms such as "relative movement" mentioned in the embodiments of the present invention not only refer to the change in position, but also include movements such as rotation and rolling where the position does not change relatively, but the state changes.

[0033] Finally, it should be noted that when a component is referred to as "being located" or "being provided on" another component, it can be on the other component or there may be an intermediate component at the same time. When a component is referred to as "being connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time.

[0034] As Figures 1 to 9 shown, a double-cooling welding torch includes a welding torch head 1, a welding cable 2 connecting the welding torch head 1, and a wire feeding spring 3 located inside the welding cable 2 and the welding torch head 1. The welding torch head 1 includes a gun shell and a neck 5 of the torch located in front of the gun shell. A double-wire contact tip 4 connecting the wire feeding spring 3 is provided at the front end of the neck 5 of the torch. An air separation pipe 51 and a water separation pipe 52 sleeved on the air separation pipe 51 are installed inside the neck 5 of the torch. A moving space for the wire feeding spring 3 to move is provided inside the air separation pipe 51. An air cooling channel 53 is provided between the air separation pipe 51 and the water separation pipe 52. A water cooling channel 54 is provided between the water separation pipe 52 and the inner wall of the neck 5 of the torch. A connector 6 is fixedly provided at the end of the neck 5 of the torch. An air inlet pipe 21, a water inlet pipe 22, and a water return pipe 23 connected to the connector 6 are provided inside the welding cable 2 to improve the cooling effect of the welding torch and ensure the welding quality.

[0035] In one embodiment, by arranging two groups of welding wires in the wire feeding spring 3 and installing a double-wire conductive nozzle 4 at the end of the wire feeding spring 3, the synchronous feeding of the two groups of welding wires is realized to increase the total heat input of the welding torch. During use, the cold air supply pump supplies air separately to the air cooling channel 53 located at the head 1 of the welding torch through the air inlet pipe 21 located in the welding cable 2. An independent air inlet pipe 21 is adopted, and the air inlet pipe 21 is directly connected to the air cooling channel 53 through the connector 6, avoiding the leakage of cold air. In addition, the cold water circulation pump supplies water to the water inlet channel 541 located in the head 1 of the welding torch through the water inlet pipe 22. The water flow flows from the cold water circulation pump through the water inlet pipe 22, the connector 6, the water inlet channel 541, the water path converter 7, the return water channel 542, the connector 6, and the return water pipe 23 in sequence and then returns to the cold water circulation pump, realizing the water cooling of the welding torch. Cooperating with the air cooling of the welding torch, the heat control of the environment near the welding point during welding is effectively realized.

[0036] Preferably, a water path converter 7 is installed at the front end of the gun neck 5. Partition ribs 521 protruding from the outer wall of the partition water pipe 52 and connecting to the inner wall of the gun neck 5 are provided. The extending direction of the partition ribs 521 is the same as that of the partition water pipe 52. There are 2 partition ribs 521 and they are respectively located on both sides of the partition water pipe 52. The partition ribs 521 evenly divide the water cooling channel 54 into a water inlet channel 541 and a return water channel 542. The water path converter 7 connects the water inlet channel 541 and the return water channel 542 to form a circulating water path.

[0037] In one embodiment, the lengths of the water inlet channel 541 and the return water channel 542 are the same and are not less than the length of the gun neck 5.

[0038] In one embodiment, a rubber gasket is installed between the partition rib 521 and the inner wall of the gun neck 5.

[0039] Preferably, support ribs 522 also protrude from the outer wall of the partition water pipe 52. The extending direction of the support ribs 522 is the same as that of the partition water pipe 52. Along the circumferential direction of the partition water pipe 52, there are multiple support ribs 522 and they are evenly distributed. The support ribs 522 abut against the inner wall of the gun neck 5. The front end of the support ribs 522 abuts against the water path converter 7, and the rear end of the support ribs 522 abuts against the connector 6, enhancing the connection stability between the partition water pipe 52 and the gun neck 5.

[0040] It should be noted that the water path converter 7 is used to connect the water inlet channel 541 and the return water channel 542 to ensure that the water flow can enter the return water channel 542 from the water inlet channel 541. The water path converter 7 itself belongs to the existing conventional equipment, and the structure of the water path converter 7 will not be described in detail.

[0041] Preferably, the water inlet pipe 22 communicates with the water inlet passage 541 through the connector 6 to supply water to the water inlet passage 541. The water return pipe 23 communicates with the water return passage 542 through the connector 6 to collect the water source of the water return passage 542.

[0042] Preferably, there is a fixing rib 511 between the gas separation pipe 51 and the water separation pipe 52. The extending direction of the fixing rib 511 is the same as that of the gas separation pipe 51. Along the circumferential direction of the gas separation pipe 51, there are multiple fixing ribs 511 and they are evenly distributed. The fixing rib 511 is fixedly connected between the gas separation pipe 51 and the water separation pipe 52 to enhance the stability of the connection between the gas separation pipe 51 and the water separation pipe 52.

[0043] In an embodiment, the fixing rib 511 is fixed between the gas separation pipe 51 and the water separation pipe 52, and a sealing gasket is provided at the connection of the fixing rib 511 with the gas separation pipe 51 or the water separation pipe 52.

[0044] Preferably, the air inlet pipe 21 communicates with the air-cooling passage 53 through the connector 6. An air outlet guide 55 is further provided at the front end of the gun neck 5. The air outlet guide 55 communicates with the air-cooling passage 53 and the air outlet points to the double-wire conductive nozzle 4, so that the cold air is directed to the double-wire conductive nozzle 4 for transportation, improving the cooling effect.

[0045] Preferably, the inner wall of the gas separation pipe 51 is coated with a Teflon coating. The Teflon coating has a low friction coefficient and good wear resistance. Coating the inner wall of the gas separation pipe 51 with the Teflon coating helps to reduce the wear of the wire feeding spring 3 on the gas separation pipe 51 and improve the service life of the gas separation pipe 51.

[0046] Preferably, a cold air supply pump and a cold water circulation pump are provided at the tail of the welding cable 2. The air inlet pipe 21 is connected to the cold air supply pump, and both the water inlet pipe 22 and the water return pipe 23 are connected to the cold water circulation pump.

[0047] It should be noted that both the cold air supply pump and the cold water circulation pump are existing devices, and the specific treatment structures for cold air and cold water will not be elaborated further.

[0048] Preferably, a nozzle 8 is fixed at the end of the gun neck 5. The double-wire conductive nozzle 4 is arranged inside the nozzle 8. The double-wire conductive nozzle 4 adopts an elliptical hole structure to enable the wire to pass smoothly inside the double-wire conductive nozzle 4 and ensure good electrical conductivity of the wire. A ceramic transition piece 9 is connected to the rear end of the double-wire conductive nozzle 4. Two wire holes are provided inside the ceramic transition piece 9 to enable the wire to have good directivity when entering the double-wire conductive nozzle 4.

[0049] In an embodiment, the double-wire conductive nozzle 4 is a vulnerable part compared with the wire feeding spring 3. A ceramic transition piece 9 is installed between the double-wire conductive nozzle 4 and the wire feeding spring 3 to buffer the heat transfer from the double-wire conductive nozzle 4 to the wire feeding spring 3, realizing the protection of the wire feeding spring 3 and the gun neck 5 and avoiding overheating of the gun housing 11.

[0050] When adopting the above-mentioned double-cooling welding torch, two groups of welding wires are arranged in the wire feeding spring 3 to synchronously convey the two groups of welding wires, so as to realize double-wire welding to meet the requirements of welding operations. An independent air inlet pipe 21 is arranged in the welding cable 2, and the air inlet pipe 21 is connected to the air-cooling channel 53 to prevent air leakage during the air transportation process, which may affect the air-cooling effect of the welding operation. A water-cooling channel 54 is also arranged outside the air-cooling channel 53 to realize double cooling of the welding torch and improve the cooling effect of the welding torch.

[0051] The above description is only for the embodiments of the present application and is not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A dual-cooling welding gun, comprising a welding gun head, a welding cable connected to the welding gun head, and a wire feeding spring located inside the welding cable and the welding gun head, wherein the welding gun head comprises a gun housing and a gun neck located in front of the gun housing, characterized in that: The front end of the gun neck is provided with a double welding wire conductive nozzle connected to the wire feeding spring, an air isolation tube and a water-blocking tube sleeved on the air isolation tube are installed inside the gun neck, a moving space for the wire feeding spring is provided inside the air isolation tube, an air cooling channel is provided between the air isolation tube and the water-blocking tube, a water cooling channel is provided between the water-blocking tube and the inner wall of the gun neck, a connector is fixedly provided at the end of the gun neck, and an air inlet pipe, a water inlet pipe and a water return pipe connected to the connector are provided in the welding cable.

2. A dual cooling welding gun according to claim 1, characterized in that: A water channel converter is installed at the front end of the gun neck, and a partition rib connected to the inner wall of the gun neck protrudes from the outer wall of the watertight pipe. The extension direction of the partition rib is consistent with the extension direction of the watertight pipe. There are two partition ribs and they are respectively located on both sides of the watertight pipe. The partition ribs divide the water cooling channel into an inlet channel and a return channel, and the water channel converter connects the inlet channel and the return channel.

3. A dual cooling welding gun according to claim 2, characterized in that: The outer wall of the watertight pipe also has protruding support ribs, and the extension direction of the support ribs is consistent with the extension direction of the watertight pipe. Along the circumferential direction of the watertight pipe, there are multiple support ribs that are evenly distributed. The support ribs abut against the inner wall of the gun neck, the front end of the support rib abuts against the water channel converter, and the rear end of the support rib abuts against the connector.

4. A dual cooling welding gun according to claim 2, characterized in that: The water inlet pipe is communicated with the water inlet channel through a connector, and the water return pipe is communicated with the water return channel through the connector.

5. A dual cooling welding gun according to claim 1, characterized in that: There is a fixing rib between the air barrier tube and the watertight pipe, the extension direction of the fixing rib is consistent with the extension direction of the air barrier tube, there are multiple fixing ribs and they are evenly distributed along the circumferential direction of the air barrier tube, and the fixing ribs are fixedly connected between the air barrier tube and the watertight pipe.

6. A dual cooling welding gun according to claim 1, characterized in that: The air inlet pipe is connected to the air cooling channel through the connector, and a gas outlet guide is also provided at the front end of the gun neck. The gas outlet guide is connected to the air cooling channel and the gas outlet points to the double welding wire conductive nozzle.

7. A dual cooling welding gun according to claim 1, characterized in that: The inner wall of the air isolation tube is coated with a Teflon coating.

8. A dual cooling welding gun according to claim 1, characterized in that: A cold air supply pump and a cold water circulation pump are arranged at the tail of the welding cable, the air inlet pipe is connected to the cold air supply pump, and the water inlet pipe and the water return pipe are both connected to the cold water circulation pump.

9. A dual cooling welding gun according to claim 1, characterized in that: A nozzle is fixed at the end of the gun neck, and the double welding wire conductive nozzle is arranged inside the nozzle. The double welding wire conductive nozzle adopts an elliptical hole structure. The rear end of the double welding wire conductive nozzle is connected to a ceramic transition piece, and two welding wire holes are provided in the ceramic transition piece.

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