Efficient water-cooling vertical electro-gas welding gun

Abstract

The utility model relates to the technical field of welding, and discloses an efficient water-cooling vertical electro-gas welding gun which comprises a welding gun fixing clamp and a water-cooling contact tube seat, a fixing groove is formed in one side face of the welding gun fixing clamp, and a water return pipe, a water inlet pipe and a wire feeding pipe which are sequentially and tightly arranged along the same plane are fixedly connected in the fixing groove. The water return pipe, the water inlet pipe and the wire feeding pipe each comprise a linear part and an arc curve part, the linear parts are installed in the fixing grooves, the ends of the arc curve parts are connected with the water-cooling contact tube bases, and water-cooling cavities and straight through holes are formed in the water-cooling contact tube bases. The end parts of the circular curve parts of the water return pipe and the water inlet pipe are connected and communicated with the water cooling cavity to form a circulating water loop; and the wire feeding pipe is connected with a contact tube arranged on the other side of the water cooling contact tube seat through a straight through hole. The device is simple in structure, low in cost, high in efficiency, easy to maintain, capable of effectively prolonging the service life of the contact tube, and suitable for vertical electro-gas welding of the T-shaped connector.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and more specifically to a high-efficiency water-cooled vertical gas-electric vertical welding torch. Background Technology

[0002] Arc welding is a crucial metal joining technology; approximately half of all steel products are manufactured through welding. Therefore, improving welding efficiency is a critical issue in welding production. Among various arc welding methods, vertical gas-electric welding is an ultra-efficient approach, particularly suitable for vertical welding of thick plates. It is widely used in the assembly welding of segmented ship hulls, vertical seam welding of large storage tanks, and the manufacturing of heavy machinery. The vertical gas-electric welding torch operates at high current and is situated at high temperatures within the weld seam; therefore, torch cooling is essential to ensuring stable operation over extended periods.

[0003] Currently, vertical gas-electric welding torches are water-cooled only at the torch holder fixing point. There's a gap of over 100mm between the water-cooled area and the contact tip, where heat is conducted through the copper torch shaft. While the copper shaft has good thermal conductivity, this indirect cooling method still keeps the contact tip operating at high temperatures. Under high temperatures, the contact tip's wear resistance significantly decreases, thus limiting its continuous operating time. Another characteristic, or rather a drawback, of vertical gas-electric welding is that if the welding process is interrupted, an unfused area appears at the arc ignition point. This unfused area requires manual repair, which involves first using an arc gouging tool to remove the unfused area, followed by manual welding, increasing labor costs. Therefore, ensuring the welding torch, especially the vulnerable contact tip, can operate continuously for extended periods is crucial for improving the efficiency and quality of vertical gas-electric welding, particularly in reducing manual rework. In addition, existing vertical gas-electric welding torches have a limitation: they are only suitable for butt joint welding and cannot be used for T-joints. Utility Model Content

[0004] In view of this, the present invention provides a high-efficiency water-cooled vertical gas-electric welding torch, which has a simple structure, low cost, high efficiency and easy maintenance, can effectively improve the working life of the contact tip, and is suitable for vertical gas-electric welding of T-shaped joints.

[0005] To achieve the above objectives, the present invention provides a high-efficiency water-cooled vertical gas-electric welding torch, comprising a welding torch fixing clamp and a water-cooled conductive nozzle seat. A fixing groove is provided on one side of the welding torch fixing clamp, forming a single-sided slotted structure. A return water pipe, an inlet water pipe, and a wire feed pipe, arranged sequentially and closely along the same plane, are fixedly connected within the fixing groove. The inlet water pipe is positioned between the return water pipe and the wire feed pipe. Each of the return water pipe, inlet water pipe, and wire feed pipe includes a straight section and a curved section. The straight section is installed within the fixing groove, and the end of the curved section is connected to the water-cooled conductive nozzle seat. The water-cooled conductive nozzle seat contains a water-cooled cavity and a through hole. The ends of the curved sections of the return water pipe and inlet water pipe are connected to and communicate with the water-cooled cavity to form a circulating water loop. The wire feed pipe located on one side of the water-cooled conductive nozzle seat is connected to a conductive nozzle located on the other side of the water-cooled conductive nozzle seat through the through hole.

[0006] Preferably, the wire feeding tube includes a first wire feeding tube and a second wire feeding tube, and the first wire feeding tube and the second wire feeding tube are closely arranged along the same plane.

[0007] Preferably, the conductive tip includes a first conductive tip and a second conductive tip, wherein the first conductive tip is connected to a first wire feeding tube and the second conductive tip is connected to a second wire feeding tube.

[0008] Preferably, a welding wire guide tube made of heat-resistant insulating material is used instead of the second conductive nozzle.

[0009] Preferably, the arc curve portions of the return water pipe, the inlet water pipe, and the wire feeding pipe are concentric circles, and the difference in the radii of the concentric circles of two adjacent pipes is the outer diameter of the pipe.

[0010] Preferably, the return water pipe, the inlet water pipe, and the wire feeding pipe are welded into an integral structure and welded to the welding gun fixing clamp.

[0011] Preferably, the width of the fixing groove on the welding gun fixing clamp is the sum of the diameters of the return water pipe, the inlet water pipe, and the wire feeding pipe.

[0012] Preferably, the return water pipe, the inlet water pipe, and the wire feeding pipe are all metal pipes.

[0013] Preferably, a wire guide hose is inserted inside the wire feeding tube.

[0014] Preferably, the ends of the return water pipe and the inlet water pipe furthest from the water-cooled conductive nozzle seat are the circulating water outlet and the circulating water inlet, respectively, and the end of the wire feeding pipe furthest from the water-cooled conductive nozzle seat is the wire feeding pipe inlet.

[0015] As can be seen from the above technical solution, compared with the prior art, the high-efficiency water-cooled vertical gas-electric welding torch provided by this utility model directly cools the water-cooled conductive nozzle seat with circulating water, ensuring that the conductive nozzle is in a low-temperature working state, effectively improving the service life of the conductive nozzle. The welding torch fixing clamp is an eccentric structure with a single-sided slot, which can be used not only for conventional butt joint vertical gas-electric welding, but also for T-joint vertical gas-electric welding, and can also be extended to dual wires, effectively improving welding efficiency and reducing welding heat input, reducing manual rework costs, and improving overall welding efficiency. It is of great significance for vertical gas-electric welding, a welding method with ultra-high welding heat input. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is a structural diagram of a first embodiment of the high-efficiency water-cooled vertical gas-electric welding torch of this utility model;

[0018] Figure 2 This is a structural diagram of Embodiment 2 of the high-efficiency water-cooled vertical gas-electric welding torch of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 101-Return water pipe, 102-Inlet water pipe, 103-First wire feeding pipe, 104-Second wire feeding pipe, 201-Welding torch fixing clamp, 202-Water-cooled conductive nozzle holder, 1031-First conductive nozzle, 1041-Second conductive nozzle. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of an exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] Please see the appendix Figures 1-2This utility model discloses a high-efficiency water-cooled vertical gas-electric welding torch. Its core lies in solving the problems of high-temperature wear of the conductive nozzle and limited joint adaptability in existing technologies through a single-sided slotted eccentric structure design and a direct cooling mechanism of the water-cooled conductive nozzle holder 202. This high-efficiency water-cooled vertical gas-electric welding torch includes a welding torch holder 201 and a water-cooled conductive nozzle holder 202. A concave fixing groove is provided on one side of the welding torch holder 201 to form a single-sided slotted structure. This eccentric structure can be used not only for conventional butt joint vertical gas-electric welding but also for T-shaped joint vertical gas-electric welding, breaking through the limitation of traditional welding torches being only suitable for conventional butt joints.

[0022] The return water pipe 101, the inlet water pipe 102, and the wire feeding pipe are closely arranged in the fixed groove. The three are arranged in parallel along the same plane, with the inlet water pipe 102 located in the middle, forming a compact layout of "return water pipe 101-inlet water pipe 102-wire feeding pipe 103". The parallel welding plane of the return water pipe 101, the inlet water pipe 102, and the wire feeding pipe is flush with one side of the welding gun fixing clamp 201. All pipes are divided into straight sections and arc-curved sections. The straight sections are embedded in the fixed groove and welded to the welding gun fixing clamp 201 to ensure structural stability. The arc-curved sections extend towards the water-cooled conductive nozzle seat 202, and the final end is precisely connected to the water-cooled cavity and straight hole inside the water-cooled conductive nozzle seat 202.

[0023] The water-cooled cavity inside the water-cooled conductive nozzle holder 202 is connected to the return water pipe 101 and the inlet water pipe 102 to form a closed-loop circulating water circuit. The return water pipe 101 and the inlet water pipe 102 serve as circulating water-cooling pipes, and the cooling water flows directly through the interior of the water-cooled conductive nozzle holder 202. The heat in the conductive nozzle area is quickly removed through heat exchange. Compared with the indirect cooling method of traditional copper rod heat conduction, this can significantly reduce the working temperature of the conductive nozzle, improve wear resistance and continuous working life. The wire feeding tube located on one side of the water-cooled conductive nozzle holder 202 is connected to the conductive nozzle located on the other side of the water-cooled conductive nozzle holder 202 through a straight hole to form a welding wire transmission channel, ensuring that the welding wire is accurately guided to the welding area.

[0024] The wire feed tube and the circulating water cooling tube are made of bent metal tubing and are welded together in parallel to form the main body of the welding torch. One end of the main body of the welding torch, consisting of the wire feed tube and the circulating water cooling tube, is welded to the water-cooled conductive nozzle seat 202. The internal structure of the connection between the water-cooled conductive nozzle seat 202 and the circulating water cooling tube is a hollow structure. Circulating water enters the cavity inside the water-cooled conductive nozzle seat 202 and then returns, cooling the water-cooled conductive nozzle seat 202. The straight sections of the wire feed tube and the circulating water cooling tube are welded to the welding torch fixing clamp. The other end of the wire feed tube and the circulating water cooling tube is divided into three independent interfaces: the wire feed tube inlet, the circulating water inlet, and the circulating water outlet.

[0025] Example 1:

[0026] like Figure 1 As shown, in this embodiment, the high-efficiency water-cooled vertical gas-electric welding torch is a single-wire welding torch, comprising three metal pipes: a return water pipe 101, an inlet water pipe 102, and a first wire feeding pipe 103. These are preferably copper pipes. The return water pipe 101 and inlet water pipe 102 are circulating water-cooled pipes. This arrangement is intended to allow the cold water to better cool the first wire feeding pipe 103 and the first conductive nozzle 1031. The three metal pipes consist of straight sections and curved sections, with the curved sections forming concentric circles. The difference in radii between the concentric circles of two adjacent metal pipes is the outer diameter of the metal pipe, resulting in a compact overall structure with consistent curvature. This effectively avoids the risk of leakage or breakage due to stress concentration at pipe bends. The three metal pipes—return water pipe 101, inlet water pipe 102, and first wire feeding pipe 103—are arranged closely together on the same plane and welded together to form the main body of the welding torch. The welding torch holder 201 has a single-sided slotted structure. The slot depth is equal to the diameter of the metal tube, and the width is the sum of the diameters of three metal tubes.

[0027] The straight section of the main body of the welding torch, which consists of the return water pipe 101, the inlet water pipe 102 and the first wire feeding pipe 103, is placed in the fixing groove of the welding torch fixing clamp 201 and welded together with the welding torch fixing clamp 201. The end of the arc-shaped section of the welding torch body, which consists of the return water pipe 101, the inlet water pipe 102, and the first wire feeding pipe 103, is welded to the water-cooled conductive nozzle seat 202 containing a water-cooled cavity. The return water pipe 101 and the inlet water pipe 102 are connected to the water-cooled cavity inside the water-cooled conductive nozzle seat 202, forming a circulating water circuit. Cooling water flows into the water-cooled cavity from the inlet water pipe 102, and after sufficient heat exchange, it flows out from the return water pipe 101, forming an efficient heat dissipation path. The first wire feeding pipe 103 is connected to the first conductive nozzle 1031 located on the other side of the water-cooled conductive nozzle seat 202 through a straight hole inside the water-cooled conductive nozzle seat 202. A wire guide hose is installed inside the first wire feeding pipe 103 to ensure the smoothness and guiding accuracy of the welding wire. Through the water-cooled conductive nozzle seat 202, the first conductive nozzle 1031 is always in a low-temperature working state, which extends the continuous welding time and significantly reduces the welding interruption and manual rework caused by the wear of the conductive nozzle.

[0028] Example 2:

[0029] like Figure 2 As shown, based on Embodiment 1, the high-efficiency water-cooled vertical gas-electric vertical welding torch in this embodiment is a dual-wire welding torch, with the addition of a second wire feeding tube 104 and a second conductive nozzle 1041. After adding the second wire feeding tube 104 and the second conductive nozzle 1041, two welding wires can be fed simultaneously to achieve dual-wire collaborative welding.

[0030] Example 3:

[0031] To further optimize the above technical solution, compared with the above-mentioned dual-wire welding, one of the welding wires can be made into a cold wire filler wire, which can effectively improve welding efficiency and reduce welding heat input. It can effectively reduce the problems of thermal deformation and grain coarsening when welding thick plates, which is of great significance for welding methods with ultra-high welding heat input such as vertical gas-electric welding.

[0032] Specifically, either the first conductive tip 1031 or the second conductive tip 1041 can be replaced with an insulated wire feeding conduit, which can fill the large weld pool of vertical gas-electric welding with cold wire. This can further reduce the welding heat input. The cold wire is not connected to the welding power source and melts only through heat conduction. While maintaining a high cladding rate, the heat input is further reduced. This is especially suitable for heat-sensitive high-strength steel or thick plate multi-layer welding scenarios. The dual-wire structure achieves a dual improvement in welding efficiency and process adaptability without significantly increasing the size of the welding torch through modular expansion design.

[0033] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-efficiency water-cooled vertical gas-electric welding torch, characterized in that, The device includes a welding torch holder (201) and a water-cooled conductive nozzle holder (202). A fixing groove is provided on one side of the welding torch holder (201), forming a single-sided slotted structure. A return water pipe (101), an inlet water pipe (102), and a wire feed pipe, arranged sequentially and closely along the same plane, are fixedly connected within the fixing groove. The inlet water pipe (102) is positioned between the return water pipe (101) and the wire feed pipe. Each of the return water pipe (101), the inlet water pipe (102), and the wire feed pipe includes both straight sections and curved sections. The straight section is installed in the fixed groove, and the end of the arc-shaped section is connected to the water-cooled conductive nozzle seat (202). The water-cooled conductive nozzle seat (202) is provided with a water-cooled cavity and a straight hole. The ends of the arc-shaped sections of the return water pipe (101) and the inlet water pipe (102) are connected to the water-cooled cavity and communicate to form a circulating water circuit. The wire feeding tube located on one side of the water-cooled conductive nozzle seat (202) is connected to the conductive nozzle located on the other side of the water-cooled conductive nozzle seat (202) through the straight hole.

2. The high-efficiency water-cooled vertical gas-electric welding torch according to claim 1, characterized in that, The wire feeding tube includes a first wire feeding tube (103) and a second wire feeding tube (104), which are closely arranged along the same plane.

3. The high-efficiency water-cooled vertical gas-electric welding torch according to claim 2, characterized in that, The conductive nozzle includes a first conductive nozzle (1031) and a second conductive nozzle (1041). The first conductive nozzle (1031) is connected to the first wire feeding tube (103), and the second conductive nozzle (1041) is connected to the second wire feeding tube (104).

4. The high-efficiency water-cooled vertical gas-electric welding torch according to claim 3, characterized in that, The second conductive nozzle (1041) is replaced with a welding wire guide tube made of heat-resistant insulating material.

5. The high-efficiency water-cooled vertical gas-electric welding torch according to claim 1, characterized in that, The arc curves of the return water pipe (101), the inlet water pipe (102), and the wire feeding pipe are concentric circles, and the difference between the radii of the concentric circles of two adjacent pipes is the outer diameter of the pipe.

6. The high-efficiency water-cooled vertical gas-electric welding torch according to claim 1, characterized in that, The return water pipe (101), the inlet water pipe (102), and the wire feeding pipe are welded into a single structure and welded to the welding gun fixing clamp (201).

7. The high-efficiency water-cooled vertical gas-electric welding torch according to claim 1, characterized in that, The width of the groove on the welding torch clamp (201) is the sum of the diameters of the return water pipe (101), the inlet water pipe (102), and the wire feeding pipe.

8. The high-efficiency water-cooled vertical gas-electric welding torch according to claim 1, characterized in that, The return water pipe (101), the inlet water pipe (102), and the wire feeding pipe are all metal pipes.

9. The high-efficiency water-cooled vertical gas-electric welding torch according to claim 1, characterized in that, The wire feeding tube is equipped with a wire guide hose inside.

10. The high-efficiency water-cooled vertical gas-electric welding torch according to claim 1, characterized in that, The return water pipe (101) and the inlet water pipe (102) are respectively located at the ends away from the water-cooled conductive nozzle seat (202) as the circulating water outlet and the circulating water inlet, and the end of the wire feeding pipe that is away from the water-cooled conductive nozzle seat (202) is the wire feeding pipe inlet.

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