A quick-connect plug and a cold liquid welding torch
By designing the center hole, socket hole, and water-locking core of the quick-connect plug, the problem of complex water circuit connection for liquid-cooled welding guns is solved, achieving a simple and compact water circuit structure and convenient assembly, thus reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PANASONIC WELDING SYST TANGSHAN
- Filing Date
- 2025-07-10
- Publication Date
- 2026-06-02
AI Technical Summary
Existing liquid-cooled welding torches typically require additional water pipes for water circuit connections, resulting in complex piping, large footprint, and high operating costs.
It adopts a quick-connect plug structure, including the body and the insulating jacket. Through the stepped design of the center hole and the socket hole, combined with the water-locking core and the sealing ring, it can achieve quick connection and sealing of the coolant flow channel and prevent coolant leakage.
It achieves a simple and compact water circuit connection, is easy to assemble, reduces operating costs, and ensures that the circulation of coolant is not affected.
Smart Images
Figure CN224315724U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of welding water-cooled sealing technology, and in particular to a quick-connect plug and a cold liquid welding gun. Background Technology
[0002] MIG / MAG welding is an arc welding method that uses inert gas protection and welding wire as the consumable electrode. It offers high weld quality and high production efficiency. In the field of high-current welding of medium and thick plates, liquid-cooled welding torches are mostly used. The water circuit connection of related liquid-cooled welding torches typically involves an additional water pipe connecting the water outlet of the welding torch tube to the water inlet of the nozzle, and then connecting the water outlet of the nozzle to the water inlet of the welding torch tube to achieve coolant circulation. However, this type of connection piping is complex, occupies a large volume, and has high operating costs. Summary of the Invention
[0003] The purpose of this application is to provide a quick-connect plug and a liquid cooling welding torch to solve the problem that the water circuit connection of liquid cooling welding torches in the prior art usually adopts the method of additional water pipe configuration, which results in more connection pipes, larger volume, and higher usage costs.
[0004] To solve the above-mentioned technical problems, this application adopts the following technical solution:
[0005] On the one hand, this application provides a quick-connect plug, including:
[0006] The body defines a central hole, which is constructed as a stepped hole to form a first stepped surface, which divides the central hole into a first hole segment and a second hole segment.
[0007] An insulating jacket defines a socket hole, the socket hole being constructed as a stepped hole to form a second stepped surface, the second stepped surface dividing the socket hole into a third segment and a fourth segment, the third segment being fitted onto the outer wall of the body;
[0008] A water-locking core has a stop portion located within the second hole section. A first sealing ring is sandwiched between the stop portion and the first stepped surface. The end of the water-locking core relative to one side of the second hole section defines a guide hole. The guide hole has a side port on the side wall of the water-locking core. The side port is located on the side of the first sealing ring relative to the second hole section. A spring is sandwiched between the stop portion and the second stepped surface.
[0009] In this design, the body defines a central hole, which is constructed as a stepped hole to form a first stepped surface. The first stepped surface divides the central hole into a first segment and a second segment. The second segment is used to connect the nozzle's inlet or outlet connector, thus connecting the body to the nozzle. The connected inlet or outlet connector communicates with the central hole, creating conditions for coolant flow. Furthermore, an insulating sleeve is fitted onto one side of the body at the first segment. The insulating sleeve is made of insulating material and defines a connecting hole. The connecting hole is constructed as a stepped hole to form a second stepped surface. The second stepped surface divides the connecting hole into a third segment and a fourth segment. The diameter of the third segment is larger than that of the fourth segment and fits onto the outer wall of the body, thereby connecting the connecting hole with the central hole. Further, one end of the insulating sleeve at the fourth segment is used to connect to the inlet or outlet port of the welding torch barrel, thus connecting the inlet or outlet port with the connecting hole.
[0010] During assembly, insert the insulating sleeves of the two plugs into the water inlet and outlet ports of the welding torch barrel, respectively, and then insert the water inlet and outlet connectors of the nozzles into the second holes of the plug bodies. Coolant flows into the socket hole through the water inlet port of the welding torch barrel, enters the central hole through the socket hole, and then enters the water inlet connector of the nozzle through the central hole. After heat exchange in the nozzle, the coolant flows back into the welding torch barrel in sequence through the outlet connector, the central hole, the socket hole, and the water inlet port, thus achieving circulation.
[0011] To prevent coolant from flowing out of the second orifice port during nozzle insertion and replacement, this design incorporates a water-locking core within the central hole. The water-locking core has a stop portion located within the second orifice, with a first sealing ring sandwiched between the stop portion and a stepped surface. A spring, specifically a compression spring, is also sandwiched between the stop portion and the second stepped surface. When the nozzle connector is not inserted, the spring's action causes the stop portion to press the first sealing ring against the first stepped surface, separating the first and second orifice sections and preventing coolant from flowing out of the second orifice. Furthermore, a guide hole is defined at the end of the water-locking core relative to the second orifice, and this guide hole has a side port on its sidewall. The side port is located on the side of the first sealing ring relative to the second orifice. When the first sealing ring presses against the first stepped surface, the side port is separated from the first orifice, preventing coolant from the first orifice from entering the guide hole through the side port.
[0012] When the nozzle connector is inserted into the second orifice, the end of the connector abuts against the water-locking core, and the port of the guide hole on one side of the second orifice connects to the cooling channel inside the connector. Under the pressure of the connector, the water-locking core moves towards the second stepped surface, thereby compressing the spring. As the water-locking core moves, the stop releases the first sealing ring. At this time, the coolant can flow through the gap between the first sealing ring and the first orifice. On the nozzle inlet connector side, the coolant flow path is: welding torch barrel - first orifice - guide hole - nozzle; wherein, the coolant in the first orifice enters the guide hole through the side port. On the nozzle outlet connector side, the coolant flow path is: nozzle - guide hole - first orifice - welding torch barrel; wherein, the coolant in the guide hole flows out through the side port into the first orifice.
[0013] Optionally, the second orifice is constructed as a stepped orifice to form a third stepped surface. A sealing assembly is provided in the second orifice. The sealing assembly includes a second sealing ring and a sealing ring retainer. The second sealing ring is sandwiched between the sealing ring retainer and the third stepped surface. The second sealing ring and the sealing ring retainer are sleeved on the outer periphery of the nozzle connector to form a sealing structure.
[0014] Optionally, the outer periphery of the sealing ring retainer has threads, the second hole section has a threaded section that mates with the threads, and the sealing ring retainer has a plurality of mounting holes axially arranged on the end face of the second hole section port side, the plurality of mounting holes being symmetrically arranged relative to the center of the sealing ring retainer.
[0015] Optionally, the second sealing ring is a UN-type ring.
[0016] This solution ensures a tight seal between the nozzle connector and the second orifice section by incorporating a sealing assembly, preventing coolant leakage. The sealing assembly includes a second sealing ring and a sealing ring retainer. The sealing ring retainer is threaded onto the side of the second orifice section near its port and can be installed via mounting holes on its end face. Specifically, by inserting a special tool into two centrally symmetrical mounting holes and twisting the tool, the sealing ring retainer can be screwed into the second orifice section. Compared to related technologies that often use a hexagonal mounting method, this solution utilizes mounting holes with equal space requirements, enabling overall plug miniaturization.
[0017] In this design, the second sealing ring is sandwiched between the sealing ring retainer and the third stepped surface. The second sealing ring is a UN-type ring. Compared to O-rings, UN-type rings can accommodate greater eccentricity. This characteristic provides a basis for a hard connection between the insulating jacket and the welding torch barrel.
[0018] Optionally, the insulating jacket is made of polyetheretherketone.
[0019] The requirements for using a welding torch dictate that the torch barrel must be energized while the nozzle must not. In this design, the insulating jacket is made of polyetheretherketone (PEEK). PEEK is an insulating material, ensuring that current cannot be conducted between the welding torch and the nozzle. PEEK also possesses excellent mechanical strength, dimensional stability, abrasion resistance, and hydrolysis resistance, ensuring the insulating jacket has high strength and stability.
[0020] On the other hand, this application provides a cold liquid welding torch, including the quick-connect plug described in any of the above claims.
[0021] Compared with the prior art, the beneficial effects achieved by this application are as follows: In this application, the body and the insulating jacket are respectively connected to the nozzle connector and the welding torch barrel interface. The body defines a central hole, and the insulating jacket defines a socket hole and is fitted onto the body, thereby forming a coolant flow channel connecting the interface and the connector. Compared with the method of connecting the interface and the connector through connecting pipes in related technologies, the structure of the body and the insulating jacket in this application is simple and compact, and easy to assemble. In addition, to prevent coolant from flowing out of the second hole section port during the insertion and replacement of the connector, this application provides a water-locking core in the central hole, and the water-locking core has a stop part. By pressing the stop part with a spring, the first sealing ring can be driven to abut against the first stepped surface, thereby blocking the coolant flow channel and preventing coolant from flowing out of the second hole section. This application opens the coolant flow channel after the connector is installed by defining a guide hole in the water-locking core. The nozzle connector is inserted into the second hole section and presses against the water-locking core, thereby releasing the first sealing ring. The coolant located in the first hole section can flow in the gap between the first sealing ring and the first hole section, and communicate with the guide hole to form a coolant flow channel. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this disclosure 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 some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the quick-connect plug assembly provided in this application;
[0024] Figure 2 This is a diagram illustrating the disassembly of the quick-connect plug provided in this application;
[0025] Figure 3 This is a schematic diagram of the overall structure of some embodiments provided in this application;
[0026] Figure 4 These are schematic diagrams of the main body structure of some embodiments provided in this application;
[0027] Figure 5 These are schematic diagrams of the insulating jacket structure of some embodiments provided in this application;
[0028] Figure 6 These are schematic diagrams of the water-locking core structure of some embodiments provided in this application;
[0029] Figure 7 These are schematic diagrams of the internal structure of some embodiments provided in this application when the nozzle is not assembled;
[0030] Figure 8 These are schematic diagrams showing the internal structure of the nozzle after assembly, based on some embodiments provided in this application;
[0031] Figure 9 This is a schematic diagram showing the mounting hole positions of some embodiments provided in this application.
[0032] Explanation of reference numerals in the attached drawings: 1-body; 2-insulating jacket; 3-water-locking core; 4-first sealing ring; 5-spring; 6-second sealing ring; 7-sealing ring retainer; 8-nozzle; 9-welding gun barrel; 11-first stepped surface; 12-first hole section; 13-second hole section; 131-third stepped surface; 21-second stepped surface; 22-third hole section; 23-fourth hole section; 31-guide hole; 32-stop part; 311-side port; 71-mounting hole. Detailed Implementation
[0033] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure / application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use.
[0034] Example 1
[0035] This embodiment describes a quick-connect plug and a cold liquid welding torch, see reference. Figure 1 and Figure 2 In this embodiment, the quick-connect plug and coolant welding torch include a body 1. The body 1 defines a central hole, which is constructed as a stepped hole to form a first stepped surface 11. The first stepped surface 11 divides the central hole into a first segment 12 and a second segment 13. The second segment 13 is used to insert the inlet or outlet connector of the nozzle 8, thereby connecting the body 1 to the nozzle 8. The inserted inlet or outlet connector can communicate with the central hole, creating conditions for the flow of coolant.
[0036] An insulating jacket 2 is fitted onto one side of the body 1, located in the first hole segment 12. The outer periphery of the insulating jacket 2 has threads for connection with the welding torch barrel 9. The requirements of the welding torch dictate that the welding torch barrel 9 must be energized while the nozzle 8 must not. In this embodiment, the insulating jacket 2 is made of an insulating material to prevent current from the welding torch barrel 9 from being conducted to the nozzle 8. As an optional implementation, the insulating jacket 2 is made of polyetheretherketone (PEEK). PEEK possesses excellent mechanical strength and dimensional stability, wear resistance, and hydrolysis resistance, ensuring that the insulating jacket 2 has high strength and stability. Furthermore, the insulating jacket 2 defines a socket hole, which is constructed as a stepped hole to form a second stepped surface 21. The second stepped surface 21 divides the socket hole into a third hole segment 22 and a fourth hole segment 23. The diameter of the third hole segment 22 is larger than that of the fourth hole segment 23, and it fits onto the outer wall of the body 1, thereby connecting the socket hole to the central hole. The insulating jacket 2 is located at one end of the fourth hole section 23 and is used to be inserted into the water inlet or outlet of the welding torch barrel 9, so that the water inlet or outlet is connected to the socket hole.
[0037] During assembly, the insulating sleeves 2 of the two plugs are inserted into the water inlet and outlet ports of the welding torch tube 9, respectively, and the water inlet and outlet connectors of the nozzle 8 are correspondingly inserted into the second hole section 13 of the body 1 of the two plugs. Coolant flows into the socket hole through the water inlet port of the welding torch tube 9, enters the central hole through the socket hole, and then enters the water inlet connector of the nozzle 8 through the central hole. After heat exchange in the nozzle 8, the coolant flows back into the welding torch tube 9 after passing through the water outlet connector, the central hole, the socket hole, and the water outlet port in sequence, thus achieving circulation.
[0038] To prevent coolant from flowing out of the second orifice 13 during nozzle 8 insertion and replacement, this design incorporates a water-locking core 3 within the central hole. The water-locking core 3 has a stop portion 32 located within the second orifice 13. A first sealing ring 4 (O-ring) is sandwiched between the stop portion 32 and a stepped surface. A spring 5 (compression spring) is sandwiched between the stop portion 32 and the second stepped surface 21. When the nozzle 8 connector is not inserted, the spring 5 causes the stop portion 32 to press the first sealing ring 4 against the first stepped surface 11, thus separating the first orifice 12 from the second orifice 13 and preventing coolant from flowing out of the second orifice 13. Furthermore, the end of the water-locking core 3 relative to the second orifice 13 defines a guide hole 31. The guide hole 31 has multiple side ports 311 on the sidewall of the water-locking core 3. These side ports 311 are located on the side of the first sealing ring 4 relative to the second orifice 13. When the first sealing ring 4 presses against the first stepped surface 11, the side port 311 is separated from the first hole section 12, preventing the coolant in the first hole section 12 from entering the guide hole 31 through the side port 311.
[0039] When the connector of nozzle 8 is inserted into the second orifice 13, the end of the connector can abut against the water-locking core 3, and the port of the guide hole 31 located on one side of the second orifice 13 can connect with the cooling channel inside the connector. Under the pressure of the connector, the water-locking core 3 moves toward the second stepped surface 21, thereby compressing the spring 5. As the water-locking core 3 moves, the stop part 32 will release the first sealing ring 4. At this time, the coolant can flow in the gap between the first sealing ring 4 and the first orifice 12. On the water inlet connector side of nozzle 8, the coolant flow path is: welding torch tube 9 - first orifice 12 - guide hole 31 - nozzle 8; wherein, the coolant in the first orifice 12 enters the guide hole 31 through the side port 311. On the water outlet connector side of nozzle 8, the coolant flow path is: nozzle 8 - guide hole 31 - first orifice 12 - welding torch tube 9; wherein, the coolant in the guide hole 31 flows out through the side port 311 and enters the first orifice 12.
[0040] Example 2
[0041] Based on the same inventive concept as Embodiment 1, refer to Figure 1 and Figure 2 In this embodiment, a sealing assembly is provided in the second orifice 13 to ensure the sealing of the connection between the nozzle 8 connector and the second orifice 13.
[0042] Specifically, the second hole segment 13 is constructed as a stepped hole to form a third stepped surface 131. The sealing assembly includes a second sealing ring 6 and a sealing ring retainer 7. The outer circumference of the sealing ring retainer 7 has threads, and the second hole segment 13 has a threaded section that mates with the threads. Multiple mounting holes 71 are axially arranged on the end face of the sealing ring retainer 7 located on one side of the port of the second hole segment 13. The multiple mounting holes 71 are symmetrically arranged relative to the center of the sealing ring retainer 7. The mounting holes 71 on the end face of the sealing ring retainer 7 facilitate the installation operation between the sealing ring retainer 7 and the second hole segment 13. Specifically, by inserting a special tool or other rod-shaped tool adapted to the mounting holes 71 into two centrally symmetrical mounting holes 71, the sealing ring retainer 7 can be screwed into the second hole segment 13 by twisting the tool. Compared to related technologies that often use a hexagonal arrangement for installation, this embodiment creates conditions for overall plug miniaturization by setting the mounting holes 71 to occupy an equal amount of space.
[0043] Furthermore, the second sealing ring 6 is sandwiched between the sealing ring retainer 7 and the third stepped surface 131. The second sealing ring 6 is fitted onto the outer periphery of the nozzle 8 connector to form a sealing structure. As an optional implementation, the second sealing ring 6 is a UN-type ring. Compared to O-rings, UN-type rings can accommodate greater eccentricity. This characteristic provides a basis for a hard connection between the insulating jacket 2 and the welding torch barrel 9.
[0044] Example 3
[0045] This embodiment describes a cold liquid welding torch, which includes the quick-connect plug as described in Embodiment 1 or Embodiment 2.
[0046] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this disclosure / application, and these improvements and modifications should also be considered within the protection scope of this disclosure / application.
Claims
1. A quick-connect plug, characterized in that, include: Body (1), the body (1) defines a central hole, the central hole is constructed as a stepped hole to form a first stepped surface (11), the first stepped surface (11) divides the central hole into a first hole segment (12) and a second hole segment (13). An insulating jacket (2) defines a socket hole, the socket hole being constructed as a stepped hole to form a second stepped surface (21), the second stepped surface (21) dividing the socket hole into a third segment (22) and a fourth segment (23), the third segment (22) being fitted onto the outer wall of the body (1); A water-locking core (3) has a stop portion (32) located inside the second hole section (13). A first sealing ring (4) is sandwiched between the stop portion (32) and the first stepped surface (11). The end of the water-locking core (3) relative to the second hole section (13) defines a guide hole (31). The guide hole (31) has a side port (311) on the side wall of the water-locking core (3). The side port (311) is located on the side of the first sealing ring (4) relative to the second hole section (13). A spring (5) is sandwiched between the stop portion (32) and the second stepped surface (21).
2. The quick-connect plug according to claim 1, characterized in that, The second hole segment (13) is constructed as a stepped hole to form a third stepped surface (131). A sealing assembly is provided in the second hole segment (13). The sealing assembly includes a second sealing ring (6) and a sealing ring retainer (7). The second sealing ring (6) is sandwiched between the sealing ring retainer (7) and the third stepped surface (131). The second sealing ring (6) and the sealing ring retainer (7) are sleeved on the outer periphery of the nozzle (8) connector to form a sealing structure.
3. The quick-connect plug according to claim 2, characterized in that, The outer periphery of the sealing ring retainer (7) has threads, and the second hole section (13) has a threaded section that mates with the threads. The sealing ring retainer (7) has a plurality of mounting holes (71) axially arranged on the end face of the second hole section (13) on one side. The plurality of mounting holes (71) are symmetrically arranged relative to the center of the sealing ring retainer (7).
4. The quick-connect plug according to claim 2, characterized in that, The second sealing ring (6) is a UN-type ring.
5. The quick-connect plug according to claim 1, characterized in that, The first sealing ring (4) is an O-ring.
6. The quick-connect plug according to claim 1, characterized in that, The outer periphery of the insulating jacket (2) has threads for interface thread connection with the welding gun barrel (9).
7. The quick-connect plug according to claim 1, characterized in that, The insulating jacket (2) is made of polyetheretherketone.
8. The quick-connect plug according to claim 1, characterized in that, The side port (311) has multiple ports.
9. A cold liquid welding torch, characterized in that, Includes the quick-connect plug as described in any one of claims 1 to 8.