Deep hole argon arc welding gun

Abstract

The utility model relates to the technical field of welding equipment, in particular to a deep hole argon arc welding gun. The welding gun comprises an insulating outer pipe, one end of the insulating outer pipe is fixedly connected with a welding gun head, the other end of the insulating outer pipe is sleeved with a fixing sleeve, the insulating outer pipe penetrates through the fixing sleeve and is provided with a water inlet electric connector, a water outlet connector and an air inlet connector, a wire feeding pipe is fixedly installed on the outer side face of the insulating outer pipe, and a breather pipe communicated with the air inlet connector is arranged in the insulating outer pipe. The breather pipe is sleeved with a water passing electric pipe, a water channel set formed by sequentially communicating more than two water channels is arranged between the breather pipe and the water passing electric pipe, one end of a loop formed by the water channel set is communicated with the water inlet electric connector, the other end of the loop is communicated with the water outlet connector, and the water inlet electric connector, the water outlet connector and the water channel set form a water cooling loop. After the prior art is improved, the cooling efficiency is high, the welding gun is better protected, and long-time high-strength work of the welding gun can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of welding equipment, in particular to a deep-hole argon arc welding torch. Background Art

[0002] As an important welding form, gas shielded welding has the characteristics of fast welding speed, narrow heat affected zone, and small deformation of the welded part after welding; the welding process is convenient to operate, there is no slag or very little slag, and basically no slag cleaning is required after welding, and it has a quite wide application in the industrial field. However, since the welding torch is relatively close to the welding molten pool, a large amount of heat generated during the welding process will cause the nozzle copper head and the gun body to heat up. On the one hand, the high temperature will affect the normal welding operation of the operator. More importantly, the overheating of the copper head will seriously affect its service life, and the heat energy of the gun body cannot be dissipated in time, which will cause the welding wire passing through the gun body to be thermally bent and deformed, thus affecting the normal wire feeding, resulting in poor wire feeding and being unfavorable for welding.

[0003] In view of this, a Chinese patent document with the authorization number CN205386670U discloses an automatic vertical welding torch for a deep-hole welding machine, which includes an insulating outer tube. One end of the insulating outer tube is fixedly connected with a welding torch head through an insulating part and a connecting main nut. A protective cover is arranged outside the welding torch head. The other end of the insulating outer tube is provided with a water inlet pipe, a water return pipe, an air inlet pipe and a wire feeding pipe. The water inlet pipe and the air inlet pipe are connected in parallel through an air inlet quick connector. The water inlet pipe and the water return pipe form a water cooling circuit in the inner cavity of the insulating outer tube, and the water cooling circuit extends from one end of the insulating outer tube to the other end of the insulating outer tube; by forming a water cooling circuit in the inner cavity of the insulating outer tube through the water inlet pipe and the water return pipe, the water circulation cooling of the gas shielded welding torch head is realized, so that heat dissipation can be achieved at both the gun head and the gun body. However, after the cooling water enters the inner cavity of the insulating outer tube through the water inlet pipe, it only circulates once inside and then flows out from the water return pipe, with a short residence time and limited contact area, resulting in low cooler efficiency.

[0004] Therefore, it is necessary to improve the deficiencies of the above prior art. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a deep-hole argon arc welding torch aiming at the deficiencies of the above prior art, and solve the problem that the cooling water only circulates once inside the insulating outer tube after entering the inner cavity through the water inlet pipe and then flows out from the water return pipe, with a short residence time and limited contact area, resulting in low cooler efficiency.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a deep hole argon arc welding gun, comprising an insulating outer tube, one end of the insulating outer tube is fixedly connected to a welding gun head, and the other end is sleeved with a fixed sleeve, the insulating outer tube passes through the fixed sleeve and is provided with a water inlet and electricity interface, a water outlet interface and an air inlet interface, a wire feeding tube is fixedly installed on the outer side of the insulating outer tube, a ventilation pipe connected to the air inlet interface is provided in the insulating outer tube, a water and electricity pipe is outer-circuited on the ventilation pipe, a water channel group composed of more than two water channels connected in sequence is provided between the ventilation pipe and the water and electricity pipe, one end of the loop formed by the water channel group is connected to the water inlet and electricity interface, and the other end is connected to the water outlet interface, and the water inlet and electricity interface, the water outlet interface and the water channel group form a water cooling loop.

[0007] By adopting the above technical scheme, during welding, cooling water flows through the water inlet interface and out of the water outlet interface through the water channel group to form a cooling circuit. Since the water channel group is composed of more than two water channels connected in sequence, the water flow stroke inside the water-passing electricity pipe is extended in this process, and the stroke of the cooling water inside the water-passing electricity pipe is increased, that is, the residence time is delayed, and at the same time, the contact area between the cooling water and the inside of the water-passing electricity pipe is increased, thereby improving the cooling efficiency, better protecting the welding gun, and ensuring that the welding gun can work at high intensity for a long time.

[0008] The above technical solution is further configured as follows: the water channel group includes a first water channel connected to the water inlet and electricity interface, a second water channel connected to the other end of the first water channel, a third water channel connected to the other end of the second water channel, and a fourth water channel connected to the other end of the third water channel, the other end of the fourth water channel is connected to the water outlet interface, the first water channel, the second water channel, the third water channel, and the fourth water channel all extend from one end to the other end of the water and electricity pipe, and the water inlet and electricity interface, the water outlet interface, the first water channel, the second water channel, the third water channel, and the fourth water channel form a water cooling circuit.

[0009] By adopting the above technical solution, the first water channel, the second water channel, the third water channel, and the fourth water channel are connected in sequence to form an internal loop of the insulating outer tube, forming two round trips of water in the insulating outer tube, increasing the travel of the cooling water inside the insulating outer tube, that is, delaying the residence time, and at the same time increasing the contact area between the cooling water and the inside of the insulating outer tube, thereby improving the cooling efficiency.

[0010] The above technical solution is further configured as follows: the cross-sections of the first water channel, the second water channel, the third water channel, and the fourth water channel are arc-shaped and are evenly arranged on the outer periphery of the ventilation pipe.

[0011] By adopting the above technical solution, the first water channel, the second water channel, the third water channel and the fourth water channel are arranged in an arc shape evenly on the outer circumference of the ventilation pipe, so that the spatial layout is more reasonable and the cooling water absorbs heat more evenly.

[0012] The above technical solution is further configured as follows: an installation portion that transitionally cooperates with a fixed sleeve is provided at one end of the water and electricity pipe close to the water and electricity interface, a first insulating sleeve is sleeved between the installation portion and the insulating outer tube, an adapter is connected between the insulating outer tube and the welding gun head, one end of the adapter is in contact with the water and electricity pipe, and a second insulating sleeve is sleeved between the mounting portion and the insulating outer tube.

[0013] By adopting the above technical scheme, one end of the water and electricity pipe is limitedly installed in the fixed sleeve through the installation part. After the water and electricity interface is connected to electricity, the electricity is transmitted to the adapter through the installation part of the water and electricity pipe, and finally transmitted to the welding gun head; by respectively sleeved the first insulating sleeve and the second insulating sleeve between the two ends of the water and electricity pipe and the insulating outer tube, the water and electricity pipe is insulated from the outside to isolate electricity and avoid safety hazards caused by leakage.

[0014] The above technical solution is further configured as follows: the water inlet electrical interface is a quick-plug interface with a central through hole for water inlet and an outer conductive surface; the water inlet electrical interface is electrically connected to the mounting portion and its central through hole is connected to the first water channel; the water outlet interface is connected to the mounting portion and is connected to the fourth water channel; an air inlet through hole is provided in the center of the ventilation pipe.

[0015] By adopting the above technical solution, water can be introduced through the center of the quick-plug interface and the positive electrode can be connected and the installation part of the water and electricity pipe can be connected at the same time, which not only saves space but also can realize quick replacement; the protective gas is introduced into the air inlet interface and flows through the air inlet hole to the bottom of the welding gun head, which can protect the welding point from oxidation during welding.

[0016] The above technical solution is further configured as follows: a plurality of fixing parts are sleeved on one end of the insulating outer tube close to the welding gun head, the other end of the fixing part is sleeved on the wire feeding tube, a clamping groove is provided on the outside of the fixed sleeve for interference fit with the wire feeding tube, and an insulating tube is outer-coated on the wire feeding tube.

[0017] By adopting the above technical solution, the wire feeding tube is fixedly installed on the insulating outer tube through the fixing part, so that the wire feeding process during welding is stable; the other end of the wire feeding tube is clamped into the clamping groove of the fixed sleeve, which can not only make the wire feeding tube in a straightened state to make the wire feeding smoother, but also play a fixing role and save space.

[0018] The above technical solution is further configured as follows: a hot wire quick chuck is connected to one end of the wire feeding tube away from the welding gun head, a wire inlet quick connector connected to the wire feeding tube is installed at one end of the hot wire quick chuck away from the wire feeding tube, a hot wire quick chuck is also sleeved on the outside of the hot wire quick chuck, and a ground wire mounting hole is provided at one end of the hot wire quick chuck away from the hot wire quick chuck.

[0019] By adopting the above technical solution, the wire feed quick connector is connected to the wire feeding tube through the hot wire quick chuck, and the standard wire feed quick connector can be quickly connected to the external wire feeding equipment; the ground wire is installed through the hot wire quick chuck to avoid leakage and protect personal safety.

[0020] A further setting of the above technical solution is that: a wire outlet adapter is connected to one end of the wire feeding pipe close to the welding torch head, and the wire outlet adapter is detachably connected to a wire outlet quick connector.

[0021] Adopting the above technical solution, the wire outlet quick connector realizes relay through the wire outlet adapter to send the welding wire in the wire feeding pipe to the welding position. When it is necessary to adapt to different working conditions and install wire outlet quick connectors with different bending angles, the wire outlet quick connector can be removed and replaced.

[0022] A further setting of the above technical solution is that: one end of the adapter away from the insulating outer pipe is hinged to the welding torch head and the hinge shaft is fastened by screws.

[0023] Adopting the above technical solution, when it is necessary to adapt to different welding angles, the screws can be loosened, the angle of the welding torch head can be readjusted and then the screws can be tightened again, so that it can be used under multiple working conditions.

[0024] The beneficial effects achieved by the present utility model are: high cooling efficiency, better protection for the welding torch, and the ability to ensure the long-term high-intensity operation of the welding torch. Description of the Drawings

[0025] Figure 1 is the structural schematic diagram of an embodiment of the present utility model Figure 1 ;

[0026] Figure 2 is the structural schematic diagram of an embodiment of the present utility model Figure 2 ;

[0027] Figure 3 is the axial sectional view of an embodiment of the present utility model;

[0028] Figure 4 is the radial sectional view of an embodiment of the present utility model. Detailed Embodiments

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0030] Such as Figures 1-4As shown in the figure, a deep hole argon arc welding gun comprises an insulating outer tube 1, one end of the insulating outer tube 1 is fixedly connected to a welding gun head 2, and the other end is sleeved with a fixed sleeve 3, the insulating outer tube 1 passes through the fixed sleeve 3 and is provided with a water inlet and electricity interface 4, a water outlet interface 5 and an air inlet interface 6, a wire feeding tube 7 is fixedly installed on the outer surface of the insulating outer tube 1, a vent pipe 61 connected to the air inlet interface 6 is provided in the insulating outer tube 1, a water and electricity pipe 9 is provided on the outer sleeve of the vent pipe 61, and a water channel connected by two or more water channels in sequence is provided between the vent pipe 61 and the water and electricity pipe 9. The water channel group 8 is connected to the water inlet and electrical interface 4 at one end and to the water outlet interface 5 at the other end. The water inlet and electrical interface 4, the water outlet interface 5 and the water channel group 8 form a water cooling circuit. The water channel group 8 includes a first water channel 81 connected to the water inlet and electrical interface 4, a second water channel 82 connected to the other end of the first water channel 81, a third water channel 83 connected to the other end of the second water channel 82, and a fourth water channel 84 connected to the other end of the third water channel 83. The other end of the fourth water channel 84 is connected to the water outlet interface 5. The first water channel 81, the second water channel 82, and the third water channel 83 are connected to the other end of the third water channel 83. The water channel 82, the third water channel 83, and the fourth water channel 84 all extend from one end of the water and electricity pipe 9 to the other end. The water inlet and electricity interface 4, the water outlet interface 5, the first water channel 81, the second water channel 82, the third water channel 83, and the fourth water channel 84 form a water cooling circuit. The cross-sections of the first water channel 81, the second water channel 82, the third water channel 83, and the fourth water channel 84 are arc-shaped and are evenly arranged on the outer periphery of the ventilation pipe 61. The water and electricity pipe 9 is provided with a mounting portion 91 that transitionally cooperates with the fixed sleeve 3 at one end near the water inlet and electricity interface 4. The mounting portion 9 1 and the insulating outer tube 1 are sleeved with a first insulating sleeve 12, an adapter 21 is connected between the insulating outer tube 1 and the welding gun head 2, one end of the adapter 21 is abutted against the water and electricity pipe 9, and a second insulating sleeve 13 is sleeved between the insulating outer tube 1, the water inlet and electricity interface 4 is a quick-plug interface with a central through hole for water inlet and a conductive outer periphery, the water inlet and electricity interface 4 is electrically connected to the mounting portion 91 and its central through hole is connected to the first water channel 81, the water outlet interface 5 is connected to the mounting portion 91 and is connected to the fourth water channel 84, and an air inlet through hole 60 is provided in the center of the vent pipe 61.

[0031] like Figure 1 , 2As shown in FIGS. 3 and 4, several fixing members 11 are sleeved at one end of the insulating outer tube 1 close to the welding torch head 2, and the other ends of the fixing members 11 are sleeved on the wire feeding tube 7. An engaging groove 30 for interference fit with the wire feeding tube 7 is provided outside the fixing sleeve 3. An insulating tube for insulating protection is sleeved outside the wire feeding tube 7. One end of the wire feeding tube 7 remote from the welding torch head 2 is connected to a hot wire quick clamp 71. An incoming wire quick joint 72 communicating with the wire feeding tube 7 is installed at one end of the hot wire quick clamp 71 remote from the wire feeding tube 7. A hot wire quick clamp 73 is also sleeved outside the hot wire quick clamp 71. A ground wire mounting hole 730 is provided at one end of the hot wire quick clamp 73 remote from the hot wire quick clamp 71. One end of the wire feeding tube 7 close to the welding torch head 2 is connected to an outgoing wire adapter 74. The outgoing wire adapter 74 is detachably connected to an outgoing wire quick joint 75. One end of the adapter 21 remote from the insulating outer tube 1 is hinged to the welding torch head 2, and the hinge shaft is fastened by a screw.

[0032] In the above embodiment, during welding, the cooling water flows through the water inlet electrical interface 4 and flows out from the water outlet interface 5 through the water channel group 8 to form a cooling loop. Since the water channel group 8 is composed of more than two water channels connected in sequence, the water flow path is extended inside the water and electricity pipe 9 during this process, the residence time of the cooling water is increased, and at the same time the contact area between the cooling water and the inside of the water and electricity pipe 9 is increased, so that the cooling efficiency can be improved, better protection can be provided for the welding torch, and the welding torch can be ensured to work for a long time with high intensity.

Claims

1. A deep-hole argon arc welding torch, comprising an insulating outer tube, one end of the insulating outer tube is fixedly connected with a welding torch head, and the other end is sleeved with a fixed sleeve. The insulating outer tube penetrates through the fixed sleeve and is provided with a water inlet and an outlet interface and an air inlet interface. A wire feeding tube is fixedly installed on the outer side surface of the insulating outer tube, and it is characterized in that: A ventilation pipe communicating with the air inlet interface is arranged inside the insulating outer pipe. A water and electricity conducting pipe is sleeved outside the ventilation pipe. A water channel group formed by two or more water channels connected in sequence is arranged between the ventilation pipe and the water and electricity conducting pipe. One end of the loop formed by the water channel group is communicated with the water inlet and electricity interface, and the other end is communicated with the water outlet interface. The water inlet and electricity interface, the water outlet interface and the water channel group form a water cooling loop.

2. The deep-hole argon arc welding torch according to claim 1, characterized in that: The water channel group includes a first water channel communicated with the water inlet and electricity interface, a second water channel communicated with the other end of the first water channel, a third water channel communicated with the other end of the second water channel, and a fourth water channel communicated with the other end of the third water channel. The other end of the fourth water channel is communicated with the water outlet interface. The first water channel, the second water channel, the third water channel and the fourth water channel all extend from one end to the other end inside the water and electricity conducting pipe. The water inlet and electricity interface, the water outlet interface, the first water channel, the second water channel, the third water channel and the fourth water channel form a water cooling loop.

3. A deep-hole argon arc welding torch according to claim 2, characterized in that: The cross sections of the first water channel, the second water channel, the third water channel and the fourth water channel are arc-shaped and are uniformly arranged on the outer periphery of the ventilation pipe.

4. The deep-hole argon arc welding torch according to claim 3, characterized in that: An installation part in transitional fit with the fixed sleeve is arranged at one end of the water and electricity conducting pipe close to the water inlet and electricity interface. A first insulating sleeve is sleeved between the installation part and the insulating outer pipe. A connecting piece is connected between the insulating outer pipe and the welding torch head. One end of the connecting piece abuts against the water and electricity conducting pipe and a second insulating sleeve is sleeved between the connecting piece and the insulating outer pipe.

5. The deep-hole argon arc welding torch according to claim 4, characterized in that: The water inlet and electricity interface is a quick plug interface with a central through hole for water inlet and peripheral conduction. The water inlet and electricity interface is electrically connected to the installation part and its central through hole is communicated with the first water channel. The water outlet interface is connected to the installation part and is communicated with the fourth water channel. An air inlet through hole is arranged at the center of the ventilation pipe.

6. The deep-hole argon arc welding torch according to claim 5, wherein: A plurality of fixing pieces are sleeved at one end of the insulating outer pipe close to the welding torch head. The other ends of the fixing pieces are sleeved on the wire feeding pipe. A clamping groove in interference fit with the wire feeding pipe is arranged outside the fixed sleeve. An insulating pipe is sleeved outside the wire feeding pipe.

7. The deep-hole argon arc welding torch according to claim 6, characterized in that: A hot wire quick clamp is connected to one end of the wire feeding pipe far from the welding torch head. A wire feeding quick joint communicated with the wire feeding pipe is installed at one end of the hot wire quick clamp far from the wire feeding pipe. A hot wire quick clamp is also sleeved outside the hot wire quick clamp. A ground wire installation hole is arranged at one end of the hot wire quick clamp far from the hot wire quick clamp.

8. A deep-hole argon arc welding torch according to claim 7, characterized in that: A wire outlet adapter is connected to one end of the wire feeding pipe close to the welding torch head. A wire outlet quick joint is detachably connected to the wire outlet adapter.

9. A deep-hole argon arc welding torch according to any one of claims 4-8, characterized in that: One end of the connecting piece far from the insulating outer pipe is hinged to the welding torch head and the hinge shaft is fastened by a screw.

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