A gas shielded welding gun

Abstract

The present invention relates to the technical field of welding guns, in particular to a gas shielded welding gun, comprising a gun head, a connector body and a rear plug body, wherein one end of the connector body is connected to the gun head, and the other end of the connector body is connected to the rear plug body; the connector body comprises a conductive seat, which is axially provided with a threaded hole and a plurality of through holes, some of the through holes are plugged in and connected to water inlet and outlet pipes, and the other part of the through holes are plugged in and connected to air pipes; the rear plug body is connected to a plurality of power cables, which are respectively connected to the corresponding inlet and outlet water pipes; the conductive seat is provided with a water-gas plug embedded in the through hole, the water-gas plug comprises a valve core, a spring and a water valve base, the valve core is cooperatively arranged in the water-gas plug and slides along the axis of the water-gas plug, and the shoulder of the valve core abuts the end face of the water-gas plug; the gun head comprises an inner core, an end face of the inner core is provided with a water outlet joint and a water inlet joint, the end faces of the water outlet joint and the water inlet joint abut the valve core, and the through hole is connected to the inner core.

Description

Technical Field

[0001] The present invention relates to the technical field of welding guns, in particular to a gas shielded welding gun. Background Art

[0002] A welding gun generally contains structures such as an electrical circuit, a gas circuit, and a coolant circuit. A water-cooled gas shielded welding gun includes components such as a gun head, a connector, a cable, and a rear plug. The connector is used to connect the gun head and cable together, while also connecting the various circuits. During operation, cooling water flows from the rear plug into the cable, passes through the connector, and reaches the gun head. The coolant absorbs the heat in the gun head and refluxes it, passing through the connector and rear plug, and finally out into the water tank, completing the cooling cycle for the welding gun. Simultaneously, shielding gas also flows in from the rear plug, passes through the connector and the wire channel, and finally flows out of the conductive nozzle seat at the end of the gun head to protect the weld. Finally, good circuit conductivity is the guarantee for successful welding. Therefore, the conductive surface of the connector must be large enough and the contact must be tight enough.

[0003] Because welding guns require frequent assembly and disassembly, the aforementioned connection method makes the connection between the torch neck and cable difficult to assemble and disassemble, often requiring tools like wrenches. This not only hinders routine maintenance but also easily damages the cable and torch neck, shortening the service life of the welding gun. Furthermore, in water-cooled welding guns, when the torch neck is disassembled, coolant can overflow from the cable, potentially contaminating the workpiece and affecting weld quality.

[0004] To address the above technical issues, Chinese patent CN104439657A discloses a connector for connecting a welding gun neck to a cable, comprising a thumb-tight nut, a conductive flange, a self-lubricating washer, and a copper conductor. The conductive flange and copper conductor are provided with axially extending mounting holes and connection holes for connecting the cable connector, air pipe, and coolant pipe. The conductive flange is fixed within the thumb-tight nut. A boss is provided at the end of the copper conductor corresponding to the thumb-tight nut. The self-lubricating washer is positioned on this boss, located between the copper conductor and the thumb-tight nut. This end of the copper conductor is bolted to the conductive flange. The end of the thumb-tight nut facing away from the copper conductor engages the gun neck, which then extends into the thumb-tight nut and engages with its inner threaded wall. The thumb-tight nut used in this patent allows for manual assembly and disassembly of the gun neck, making assembly, disassembly, and maintenance easy and harmless to the cable and gun neck. However, the assembly and disassembly of the gun neck and cable in this patent is relatively inconvenient, requiring manual operation. Coolant leaks can easily cause production safety issues, while also impacting product quality and processing efficiency.

[0005] Therefore, it is necessary for those skilled in the art to provide a gas shielded welding gun to prevent coolant leakage when the gun neck is disassembled, improve the safety of the connector when connecting the gun neck and the cable, and improve ease of use and product quality. Summary of the Invention

[0006] The purpose of the present invention is to provide a gas shielded welding gun to solve the technical problems in the prior art such as easy leakage of coolant when disassembling the gun neck and the safety of the connecting parts when connecting the gun neck and the cable, thereby improving the convenience of use and product quality.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a gas shielded welding gun, comprising a gun head, a connector body and a rear plug body, one end of the connector body being connected to the gun head, and the other end of the connector body being connected to the rear plug body; the connector body comprising a conductive seat, a threaded hole and a plurality of through holes being axially provided on the conductive seat, a water-gas plug being embedded in the through hole on the conductive seat, the water-gas plug comprising a valve core, a spring and a water valve base, the valve core being cooperatively arranged in the water-gas plug and sliding along the axis of the water-gas plug, the shoulder of the valve core abutting the end face of the water-gas plug; the gun head comprising an inner core, a water outlet joint and a water inlet joint being provided on the end face of the inner core, the water outlet joint and the water inlet joint being installed and connected to the valve core, and the through hole being connected to the inner core.

[0008] Furthermore, some of the through holes are pluggably connected to water inlet and outlet conduits, and other part of the through holes are pluggably connected to air pipes; a plurality of power cables are connected to the rear plug body, and water inlet and outlet channels are provided in the power cables, and the power cables are respectively connected to the inlet and outlet water conduits; there are two inlet and outlet water conduits, and a conductive nut is provided at one end of the inlet and outlet water conduits, which abuts the conductive seat and is electrically connected to the conductive seat, and two power cables are provided and threadedly connected to the conductive nuts.

[0009] Furthermore, the water valve base is fixedly connected in the through hole and faces the valve core, one end of the spring abuts the water valve base, and the other end of the spring abuts the valve core. A connecting channel is provided on the valve core, and the connecting channel connects the water and gas plug and the through hole.

[0010] Furthermore, multiple interfaces are provided at the ports of multiple through holes on the connector body, and the interfaces located at the two water and gas plugs are respectively the first water pipe interface and the second water pipe interface, and the water outlet joint and the water inlet joint are respectively snap-connected with the first water pipe interface and the second water pipe interface.

[0011] Furthermore, a ventilation joint and a fixing pin are provided on the end face of the inner core. The interface located at the trachea is a trachea interface. The ventilation joint and the trachea interface are snap-fitted together. A positioning interface is also provided at the port of a through hole, and the fixing pin is plugged and connected in the positioning interface.

[0012] Furthermore, an air intake channel is axially provided in the inner core, the end of the air intake channel is pluggable and detachably connected to the threaded hole, and the air intake channel is connected to the ventilation joint; a welding wire is passed through the threaded hole, and protective gas is passed through the air pipe.

[0013] Furthermore, a high-temperature insulating tube is provided outside the inner core, and a cooling channel is provided between the inner core and the high-temperature insulating tube, and the cooling channel is connected to the first water pipe interface and the second water pipe interface; the high-temperature insulating tube is provided outside the high-temperature insulating tube, and an insulating shell is threadedly connected to an insulating bushing at one end of the insulating shell, and a water cavity shell is threadedly connected to the other end of the insulating shell, and the insulating bushing is also threadedly connected to the inner core, and the insulating shell is fixed relative to the inner core.

[0014] Furthermore, the outer shell of the heat-insulating shell is provided with a hand-screw nut, the inner wall of the hand-screw nut abuts the shoulder of the insulating bushing, and the hand-screw nut is threadedly connected to the connector body; the end face of the inner core abuts the end face of the conductive seat.

[0015] Furthermore, a diverter is sleeved on one end of the inner core, the diverter is located in the water cavity shell, a cooling cavity is formed between the diverter and the water cavity shell, and the cooling cavity is connected to the cooling channel.

[0016] Furthermore, a heat exchange cavity is formed between the inner core and the diverter, a cooling groove is provided on the inner core at the heat exchange cavity, and an inclined hole is provided on the diverter at the heat exchange cavity. The inclined hole passes through the diverter and faces the cooling groove, and the cooling cavity is connected to the heat exchange cavity.

[0017] The beneficial effects of the present invention are:

[0018] The present invention utilizes a connector body to connect the gun head and the rear plug body into one body, and simultaneously realizes the connectivity of the circuit, gas circuit, and coolant circuit; two water inlet and outlet pipes are provided on the connector body, and the water inlet and outlet pipes are used to realize the circulation supply of the coolant circuit, and the coolant circuit is placed inside the conductive seat, thereby greatly improving the cooling effect of the present invention; in order to prevent coolant leakage, the present invention provides a water-gas plug in the connector body, when the gun head is connected to the connector body, the water-gas plug is opened, and when the gun head is separated from the connector body, the water-gas plug is closed, thereby preventing the coolant in the through hole from flowing out, and improving the stability of the present invention. The present invention also adopts dual power cables to improve processing efficiency, utilizes two conductive nuts to ensure the connectivity of the power supply, improves the connection stability and welding power, and effectively extends the service life of the welding gun, and adopts a method of separating water inlet and water outlet to improve the cooling effect, reduce the heat generation and energy consumption of the present invention, and ensure the conductive performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of an explosion of a gas shielded welding gun of the present invention.

[0020] Figure 2 It is a three-dimensional schematic diagram of the connecting piece body in the gas shielded welding gun of the present invention.

[0021] Figure 3 It is an exploded view of the connector body in the gas shielded welding gun of the present invention.

[0022] Figure 4 It is a bottom view of the connector body in the gas shielded welding gun of the present invention.

[0023] Figure 5 yes Figure 4 Cross-sectional view along AA.

[0024] Figure 6 yes Figure 5 A partial enlarged schematic diagram of part A in the middle.

[0025] Figure 7 It is a main sectional view of the gun head of the gas shielded welding gun of the present invention.

[0026] Figure 8 It is a three-dimensional schematic diagram of the gun head and the connector body in the gas shielded welding gun of the present invention.

[0027] Figure 9 It is an exploded view of the gun head in the gas shielded welding gun of the present invention.

[0028] Figure 10 yes Figure 9 Exploded view of the intermediate water chamber housing and diverter.

[0029] Figure 11 yes Figure 7 Schematic diagram of the enlarged portion B.

[0030] Figure 12 It is a main sectional view of the rear plug body in the gas shielded welding gun of the present invention.

[0031] The components in the accompanying drawings are marked as follows: 1. Water and gas plug; 101. Valve core; 102. Connecting channel; 2. Spring; 103. Third O-ring; 3. Water valve base; 4. Conductive seat; 401. Through hole; 402. Threaded hole; 5. Inlet and outlet water conduits; 6. Conductive nut; 7. Insulating sleeve; 8. Connector housing; 9. Air pipe; 11. Second O-ring; 12. Gun head; 12a. Hand-screw nut; 12b. Water outlet connector; 12d. Water inlet connector; 12e. Ventilation connector; 12f. Fixing pin; 12g. Water chamber housing; 12h. Third O-ring; 12k. Diverter; 12r. Inner core; 12s. High-temperature insulating tube; 12q. Insulating bushing; 12p. Insulating housing; 120. Inlet Air channel; 121, cooling cavity; 122, inclined hole; 123, cooling channel; 124, cooling groove; 125, heat exchange cavity; 13, connector body; 13a, air pipe interface; 13b, first water pipe interface; 13c, second water pipe interface; 13d, positioning interface; 14, nozzle seat; 15, nozzle sleeve; 16, conductive nozzle seat; 17, electrode; 18, power cable; 19, ventilation cable; 20, welding wire cable; 21, rear plug body; 21a, water outlet threaded interface; 21b, water tank interface; 21c, water external interface; 21d, ventilation external interface; 21e, water inlet threaded interface; 21f, welding wire port; 22, welding wire; 23, shielding gas; 24, coolant. DETAILED DESCRIPTION

[0032] The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention.

[0033] See also Figure 1 The present invention provides a gas shielded welding gun, comprising a gun head 12, a connector body 13 and a rear plug body 21. One end of the connector body 13 is connected to the gun head 12, and the other end of the connector body 13 is connected to the rear plug body 21. When in use, the connector body 13 is used to connect the gun head 12 and the rear plug body 21 as a whole, and at the same time, the connection of the circuit, gas circuit and coolant circuit is realized, thereby ensuring the stability of the welding gun.

[0034] See also Figure 2 、 Figure 3The connector body 13 includes a conductive seat 4, an insulating sleeve 7 and a connector shell 8. The insulating sleeve 7 is sleeved on the outside of the conductive seat 4 and the insulating sleeve 7 and the conductive seat 4 are relatively fixed. The connector shell 8 is sleeved on the outside of the insulating sleeve 7 and the connector shell 8 is detachably connected to the insulating sleeve 7 using fasteners such as bolts or screws. The conductive seat 4 is cylindrical, and a threaded hole 402 is axially provided on the conductive seat 4. A plurality of through holes 401 are provided in the circular direction around the threaded hole 402 on the conductive seat 4. The inlet and outlet water conduits 5 are plugged in and connected to some of the through holes 401, and the air pipe 9 is plugged in and connected to another part of the through holes 401.

[0035] In this embodiment, there are two inlet and outlet water conduits 5, and both inlet and outlet water conduits 5 are connected with coolant 24, and the coolant 24 includes but is not limited to water. One of the two inlet and outlet water conduits 5 is used for water inlet and the other is used for water outlet. A conductive nut 6 is provided at one end of the inlet and outlet water conduits 5, and the conductive nut 6 abuts against the conductive seat 4 and is electrically connected between the conductive seat 4. The coolant 24 is passed into the inlet and outlet water conduits 5, and the conductive nut 6 is connected to the power supply; when in use, the inlet and outlet water conduits 5 are used to realize the circulation supply of the coolant 24, forming a coolant loop, and the circulation loop of the coolant 24 is placed inside the conductive seat 4, thereby greatly improving the cooling effect of the present invention, and at the same time, the two conductive nuts 6 are used to ensure the connectivity of the power supply, improve the connection stability and welding power, effectively extend the service life of the welding gun, and reduce the heat generation and energy consumption of the present invention.

[0036] Further, see Figure 3 、 Figure 5 、 Figure 6 The conductive seat 4 is embedded with a water-gas plug 1 in the through hole 401, and the water-gas plug 1 is located in the through hole 401 at one end away from the inlet and outlet water conduit 5; the present invention utilizes the opening and closing of the water-gas plug 1 to control the connectivity and closure of the through hole 401, thereby preventing the coolant 24 in the through hole 401 from flowing out and improving the stability of use.

[0037] Specifically, the water and gas plug 1 includes a valve core 101, a spring 2 and a water valve base 3. The water and gas plug 1 is a cylindrical structure with openings at both ends. The valve core 101 is cooperatively arranged in the water and gas plug 1 and slides along the axis of the water and gas plug 1. The axial shoulder of the valve core 101 abuts the end face of the water and gas plug 1 and seals the water and gas plug 1. A connecting channel 102 is provided on the valve core 101. When in use, the connecting channel 102 connects the water and gas plug 1 with the through hole 401.

[0038] The water valve base 3 is fixedly connected in the through hole 401 and faces the valve core 101. One end of the spring 2 abuts the water valve base 3, and the other end of the spring 2 abuts the valve core 101. When in use, the valve core 101 is pressed, the spring 2 is compressed and moves toward the water valve base 3, and the connecting channel 102 on the valve core 101 connects the water and gas plug 1 and the through hole 401 to realize the delivery of the coolant 24. When the force applied to the valve core 101 is removed, the valve core 101 is reset under the elastic action of the spring 2, and the axial shoulder of the valve core 101 abuts the end face of the water and gas plug 1 and seals the water and gas plug 1. The through hole 401 is closed, which effectively prevents the coolant 24 in the through hole 401 from flowing out, thereby improving the stability of the present invention.

[0039] In this embodiment, the water-gas plug 1 is detachably connected to the through hole 401 by means of a thread, and a second O-ring 11 is provided between the outer wall of the water-gas plug 1 and the inner wall of the through hole 401 to improve the sealing stability. A third O-ring 103 is provided on the shoulder of the valve core 101, and the third O-ring 103 is located between the shoulder of the valve core 101 and the end face of the water-gas plug 1. When the shoulder of the valve core 101 abuts against the end face of the water-gas plug 1, the third O-ring 103 is utilized to improve the sealing effect, prevent the coolant 24 from flowing out, and improve the stability of use of the present invention.

[0040] See also Figure 4 、 Figure 5 、 Figure 8 、 Figure 9 The gun tip 12 includes an inner core 12r, one end of which is fitted with a diverter 12k. The connector body 13 is detachably connected to the other end of the inner core 12r. During use, coolant 24 flows from the inlet and outlet water conduits 5 on the connector body 13 into the gun tip 12, where it is divided and refluxed at the diverter 12k, cooling the gun tip 12.

[0041] Furthermore, the end surface of the inner core 12r is provided with a vent connector 12e, a water outlet connector 12b, and a water inlet connector 12d. The connector body 13 is provided with multiple interfaces at the ends of the multiple through holes 401. The interfaces located at the two water and gas plugs 1 are respectively a first water pipe interface 13b and a second water pipe interface 13c, and the interface located at the air pipe 9 is an air pipe interface 13a. The vent connector 12e is snap-fitted to the air pipe interface 13a, and the water outlet connector 12b and the water inlet connector 12d are snap-fitted to the first water pipe interface 13b and the second water pipe interface 13c, respectively. The first water pipe interface 13b and the second water pipe interface 13c are respectively connected to the connection channel 102 on the water and gas plug 1.

[0042] It can be understood that the connection between the interface and the connector in the present invention is achieved by a snap-fit ​​connection in which a snap-fit ​​block and a snap-fit ​​groove cooperate with each other, or by a threaded connection using fasteners such as bolts.

[0043] Furthermore, the end faces of the water outlet connector 12b and the water inlet connector 12d abut against the valve core 101, so that when the gun head 12 is connected to the connector body 13, the water and gas plug 1 is opened, and when the gun head 12 is separated from the connector body 13, the water and gas plug 1 is closed, thereby preventing the coolant 24 in the through hole 401 from flowing out, thereby improving the stability of the use of the present invention.

[0044] Furthermore, a fixing pin 12f is provided on the end face of the inner core 12r, and a positioning interface 13d is provided at the end of a through hole 401, and the fixing pin 12f is plugged and connected in the positioning interface 13d; when in use, the fixing pin 12f is first inserted into the positioning interface 13d to ensure accurate positioning, and then the multiple interfaces and the connectors are connected to each other to complete the connection of the circuit, gas circuit, and coolant circuit.

[0045] Further, see Figure 7 An air inlet passage 120 is axially provided in the inner core 12r, and the end of the air inlet passage 120 is detachably connected to the threaded hole 402, and the air inlet passage 120 is connected to the ventilation joint 12e; a welding wire 22 is passed through the threaded hole 402, and a shielding gas 23 is passed through the air pipe 9, and the shielding gas 23 includes but is not limited to helium and argon; the welding wire 22 is passed into the air inlet passage 120 and mixed with the shielding gas 23, thereby ensuring the stability of use, reducing the internal complex structure of the welding gun, and reducing the production cost.

[0046] Please refer again Figure 7 、 Figure 8 、 Figure 9 The inner core 12r is covered with a high-temperature insulating tube 12s, and a cooling channel 123 is provided between the inner core 12r and the high-temperature insulating tube 12s, and the cooling channel 123 is connected to the first water pipe interface 13b and the second water pipe interface 13c; the high-temperature insulating tube 12s is covered with a heat-insulating outer shell 12p, and one end of the heat-insulating outer shell 12p is threadedly connected to an insulating bushing 12q, and the other end of the heat-insulating outer shell 12p is threadedly connected to a water cavity outer shell 12g. The insulating bushing 12q is also threadedly connected to the inner core 12r, so that the heat-insulating outer shell 12p is fixed relative to the inner core 12r, thereby ensuring the stability and sealing of the present invention.

[0047] Furthermore, the heat-insulating outer shell 12p is covered with a hand-screw nut 12a, the inner wall of which abuts the shoulder of the insulating bushing 12q. The hand-screw nut 12a is threadedly connected to the connector body 13. The end face of the inner core 12r abuts the end face of the conductive seat 4. During use, a worker threads the hand-screw nut 12a onto the connector body 13, ensuring a close contact and electrical connection between the inner core 12r and the conductive seat 4 on the connector body 13, thereby ensuring a stable connection between the gun tip 12 and the connector body 13. Furthermore, the inner core 12r and the heat-insulating outer shell 12p are separated, greatly reducing processing difficulty and effectively lowering production costs.

[0048] Further, see Figure 7 、 Figure 10 、 Figure 11 The diverter 12k is located in the water cavity shell 12g, and a cooling cavity 121 is formed between the diverter 12k and the water cavity shell 12g. The cooling cavity 121 is connected to the cooling channel 123.

[0049] A heat exchange cavity 125 is formed between the inner core 12r and the diverter 12k. A cooling groove 124 is provided on the inner core 12r at the heat exchange cavity 125. An inclined hole 122 is provided on the diverter 12k at the heat exchange cavity 125. The inclined hole 122 passes through the diverter 12k and faces the cooling groove 124. The cooling cavity 121 is connected to the heat exchange cavity 125.

[0050] In this embodiment, a plurality of third O-rings 12h are installed on the outer wall of the diverter 12k, and the third O-rings 12h abut against the inner wall of the water cavity shell 12g. The plurality of third O-rings 12h are used to ensure the sealing effect of the cooling cavity 121, thereby improving the stability of the present invention.

[0051] Further, see Figure 1 、 Figure 7 、 Figure 11 The end of the water chamber shell 12g is provided with a nozzle sheath 15, and the end of the inner core 12r is provided with a nozzle seat 14. The nozzle seat 14 is threadedly connected to a conductive nozzle seat 16, and the conductive nozzle seat 16 is detachably connected to an electrode 17; the outer wall of the nozzle seat 14 abuts the inner wall of the diverter 12k, and the end face of the nozzle seat 14 is close to the heat exchange cavity 125.

[0052] During use, the heat generated by the electrode 17 is transferred to the nozzle holder 14 via the contact tip holder 16. The heat exchange cavity 125 absorbs the heat from the nozzle holder 14, thereby cooling the contact tip holder 16 and the electrode 17, ensuring the stability of the present invention. Furthermore, the heat exchange cavity 125 is formed on the wall of the inner core 12r, allowing direct contact between the coolant 24 and the inner core 12r, improving heat exchange efficiency and further ensuring the stability of the present invention.

[0053] In this embodiment, the shielding gas 23 enters the conductive nozzle holder 16 from the air inlet channel 120, and then the shielding gas 23 is evenly discharged around the electrode 17 through the exhaust holes on the conductive nozzle holder 16 to isolate the air and improve the processing effect.

[0054] See also Figure 1 、 Figure 12 , the rear plug body 21 is connected to the power cable 18, the ventilation cable 19 and the welding wire cable 20, the power cables 18 are provided with two and are respectively connected to the two inlet and outlet water pipes 5, and the power cable 18 is provided with inlet and outlet water channels (not shown in the figure), one of the inlet and outlet water channels is respectively connected to one inlet and outlet water pipe 5, and the inlet and outlet water channels are externally connected to the coolant 24. When in use, the coolant 24 is injected into the inlet and outlet water channels from the rear plug body 21, and then flows into the inlet and outlet water pipe 5 to realize the transportation of the coolant 24; the present invention provides two power cables 18, and the inlet and outlet water channels are respectively independently provided in the two power cables 18. Compared with the prior art, the present invention can provide a larger coolant 24 circulation diameter within a limited cable cross-section, thereby increasing the flow rate of the coolant 24, making the transportation of the coolant 24 stronger and more stable, thereby improving the cooling effect of the present invention.

[0055] In this embodiment, the end of the power cable 18 is threadedly connected to the conductive nut 6 using locking parts such as bolts or screws to ensure the stability of the connection. The present invention adopts dual power cables to improve processing efficiency, and at the same time adopts a method of separating water inlet and water outlet to improve the cooling effect and ensure conductive performance.

[0056] Furthermore, the rear plug body 21 is provided with a water outlet threaded interface 21a and a water inlet threaded interface 21e. The water outlet threaded interface 21a is connected to the water tank interface 21b, and the water outlet threaded interface 21a is connected to one water inlet and outlet conduit 5; the water inlet threaded interface 21e is connected to the water external interface 21c, and the water inlet threaded interface 21e is connected to another water inlet and outlet conduit 5.

[0057] During use, the coolant 24 is introduced from the external water interface 21c, discharged from the water inlet threaded interface 21e, passes through a power cable 18 and a water inlet and outlet conduit 5, enters the connector body 13, and finally passes into the gun head 12 to achieve cooling; after cooling, the coolant 24 flows out from the gun head 12 and enters the connector body 13, passes through another water inlet and outlet conduit 5 and another power cable 18, flows into the rear plug body 21 from the water outlet threaded interface 21a, and flows out from the water tank interface 21b to the water tank (not shown), completing the cooling cycle.

[0058] Furthermore, the rear plug body 21 is further provided with an external ventilation interface 21 d and a welding wire through port 21 f . The external ventilation interface 21 d is connected to the ventilation cable 19 , and the welding wire through port 21 f is connected to the welding wire cable 20 .

[0059] The specific operation method of the present invention is as follows: Step 1: Install one end of the two power cables 18, the ventilation cable 19 and the welding cable 20 on the rear plug body 21, and then connect the other ends of the two power cables 18 to the two inlet and outlet water conduits 5 respectively, connect the other end of the ventilation cable 19 to the air pipe 9, and connect the other end of the welding cable 20 to the threaded hole 402, completing the connection between the plug body 21 and the connector body 13.

[0060] Step 2: Insert the fixing pin 12f on the end face of the inner core 12r into the positioning interface 13d to complete the positioning. Then, snap-fit ​​the vent connector 12e into the air pipe interface 13a, snap-fit ​​the water outlet connector 12b into the first water pipe interface 13b, and snap-fit ​​the water inlet connector 12d into the second water pipe interface 13c. This completes the connection between the inner core 12r and the connector body 13.

[0061] Step 3: Manually turn the hand-screw nut 12a to complete the installation between the gun head 12 and the connector body 13. During cooling, the coolant 24 flows from the rear plug body 21 into the connector body 13 and finally into the gun head 12, achieving cooling. After cooling, the coolant 24 flows out of the gun head 12 and into the connector body 13, finally out of the rear plug body 21, completing the circulation of the coolant 24. During operation, the coolant 24 is circulated, and the shielding gas 23 and welding wire 22 are both passed from the rear plug body 21 into the connector body 13 and finally into the gun head 12, completing welding and shielding.

[0062] The present invention utilizes a connector body 13 to connect the gun head 12 and the rear plug body 21 as a whole, while simultaneously achieving connectivity among the circuit, gas circuit, and coolant circuit. Two water inlet and outlet pipes 5 are provided on the connector body 13, and the water inlet and outlet pipes 5 are used to circulate the coolant 24. The coolant circuit is placed inside the conductive seat 4, thereby greatly improving the cooling effect of the present invention. To prevent leakage of the coolant 24, the present invention provides a water-gas plug 1 within the connector body 13. When the gun head 12 is connected to the connector body 13, the water-gas plug 1 is opened. When the gun head 12 is separated from the connector body 13, the water-gas plug 1 is closed, thereby preventing the coolant 24 in the through-hole 401 from flowing out and improving the stability of the present invention. The present invention also utilizes dual power cables to improve processing efficiency, utilizes two conductive nuts 6 to ensure power connectivity, improves connection stability and welding power, and effectively extends the service life of the welding gun. Separate water inlet and outlet are employed to improve cooling effect, reduce heat generation and energy consumption, and ensure conductive performance.

[0063] It will be understood that the present invention is described by way of some embodiments, and it will be appreciated by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A gas shielded welding gun, comprising a gun head (12), a connector body (13) and a rear plug body (21), wherein one end of the connector body (13) is connected to the gun head (12), and the other end of the connector body (13) is connected to the rear plug body (21); the connector body (13) comprises a conductive seat (4), and the conductive seat (4) is provided with a threaded hole (402) and a plurality of through holes (401) along the axial direction, characterized in that: The conductive seat (4) is provided with a water-gas plug (1) which is embedded in the through hole (401). The water-gas plug (1) includes a valve core (101), a spring (2) and a water valve base (3). The valve core (101) is arranged in the water-gas plug (1) and slides along the axis of the water-gas plug (1). The shoulder of the valve core (101) abuts against the end face of the water-gas plug (1). The gun head (12) includes an inner core (12r). An outlet joint (12b) and an inlet joint (12d) are provided on the end face of the inner core (12r). The outlet joint (12b) and the inlet joint (12d) are installed and connected to the valve core (101). The through hole (401) is connected to the inner core (12r). A diverter (12k) is provided at one end of the inner core (12r). The diverter (12k) is located in the water cavity housing (12g). The diverter (12k) A cooling cavity (121) is formed between the inner core (12r) and the water cavity shell (12g), and the cooling cavity (121) is connected to the cooling channel (123). A heat exchange cavity (125) is formed between the inner core (12r) and the diverter (12k), and the cooling cavity (121) is connected to the heat exchange cavity (125). The end of the inner core (12r) is sleeved with a nozzle seat (14), and a conductive nozzle seat (16) is threadedly connected to the nozzle seat (14), and an electrode (17) is detachably connected to the conductive nozzle seat (16); the outer wall of the nozzle seat (14) abuts the inner wall of the diverter (12k), and the end face of the nozzle seat (14) is close to the heat exchange cavity (125). The heat generated by the electrode (17) is transferred to the nozzle seat (14) through the conductive nozzle seat (16), and the heat on the nozzle seat (14) is absorbed by the heat exchange cavity (125).

2. The gas shielded welding gun according to claim 1, characterized in that: A portion of the through holes (401) is pluggably connected to an inlet and outlet water conduit (5), and another portion of the through holes (401) is pluggably connected to an air pipe (9); a plurality of power cables (18) are connected to the rear plug body (21), and the power cables (18) are provided with inlet and outlet water channels, and the power cables (18) are respectively connected to the inlet and outlet water conduits (5); two inlet and outlet water conduits (5) are provided, and one end of the inlet and outlet water conduits (5) is provided with a conductive nut (6), which abuts against the conductive seat (4) and is electrically connected to the conductive seat (4), and two power cables (18) are provided and are threadedly connected to the conductive nuts (6).

3. The gas shielded welding gun according to claim 1, characterized in that The water valve base (3) is fixedly connected in the through hole (401) and faces the valve core (101); one end of the spring (2) abuts against the water valve base (3); the other end of the spring (2) abuts against the valve core (101); a connecting channel (102) is provided on the valve core (101); the connecting channel (102) connects the water and gas plug (1) and the through hole (401).

4. The gas shielded welding gun according to claim 1, characterized in that The connector body (13) is provided with a plurality of interfaces at the ports of the plurality of through holes (401), the interfaces located at the two water and gas plugs (1) being respectively a first water pipe interface (13b) and a second water pipe interface (13c), and the water outlet connector (12b) and the water inlet connector (12d) being respectively connected to the first water pipe interface (13b) and the second water pipe interface (13c).

5. The gas shielded welding gun according to claim 4, characterized in that: A vent connector (12e) and a fixing pin (12f) are further provided on the end surface of the inner core (12r); the interface located at the trachea (9) is a trachea interface (13a); the vent connector (12e) and the trachea interface (13a) are connected by a snap fit; a positioning interface (13d) is further provided at the end of a through hole (401); the fixing pin (12f) is pluggably connected in the positioning interface (13d).

6. The gas shielded welding gun according to claim 5, characterized in that: An air intake channel (120) is axially provided in the inner core (12r), and an end portion of the air intake channel (120) is pluggably connected to the threaded hole (402), and the air intake channel (120) is connected to the ventilation joint (12e); a welding wire (22) is passed through the threaded hole (402), and a protective gas (23) is passed through the air pipe (9).

7. The gas shielded welding gun according to claim 1, characterized in that The inner core (12r) is provided with a high-temperature insulating tube (12s) on its outer sleeve, a cooling channel (123) is provided between the inner core (12r) and the high-temperature insulating tube (12s), and the cooling channel (123) is connected to the first water pipe interface (13b) and the second water pipe interface (13c); the high-temperature insulating tube (12s) is provided with a heat-insulating outer shell (12p) on its outer sleeve, one end of the heat-insulating outer shell (12p) is threadedly connected to an insulating bushing (12q), and the other end of the heat-insulating outer shell (12p) is threadedly connected to a water cavity outer shell (12g), the insulating bushing (12q) is also threadedly connected to the inner core (12r), and the heat-insulating outer shell (12p) is fixed relative to the inner core (12r).

8. The gas shielded welding gun according to claim 7, characterized in that: The heat-insulating shell (12p) is provided with a hand-screw nut (12a) on its outer shell, the inner wall of the hand-screw nut (12a) abuts against the shaft shoulder of the insulating bushing (12q), and the hand-screw nut (12a) is threadedly connected to the connector body (13); the end face of the inner core (12r) abuts against the end face of the conductive seat (4).

9. The gas shielded welding gun according to claim 1, characterized in that: A cooling groove (124) is provided on the inner core (12r) at the heat exchange cavity (125), and an inclined hole (122) is provided on the diverter (12k) at the heat exchange cavity (125). The inclined hole (122) passes through the diverter (12k) and faces the cooling groove (124).

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