Wire pushing type welding gun of gas shield welding machine

Abstract

The invention provides a wire pushing type welding gun of a gas shielded welding machine, which belongs to the technical field of gas shielded welding machines and comprises a gun head, a cable, a connecting unit and a wire feeding hose. Wherein the connecting unit comprises an air pipe joint and a conductive part, the two ends of the air pipe joint and the conductive part are connected to the cable, a supporting pipe is installed in the middle of the air pipe joint, and a narrowed supporting part is arranged in the middle of the supporting pipe; ventilation parts expanding outwards are arranged at the two ends of the supporting part, and vibration modules are installed at the two ends of the supporting pipe. The multiple connecting units distributed along the cable are arranged, the supporting pipes capable of vibrating are arranged in the connecting units, the wire feeding hose is driven by the supporting pipes to vibrate, copper cuttings and dust in the wire feeding hose fall off, and the copper cuttings and the dust which fall off fall into an air pipe through gaps generated when the wire feeding hose is bent. Online cleaning of the wire feeding hose is achieved, and the replacement period of the wire feeding hose is prolonged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of gas shielded welding machines, and particularly relates to a push wire type welding gun of a gas shielded welding machine. BACKGROUND

[0002] A gas shielded welding machine is a welding device that uses a protective gas to prevent the welding area in a molten state from chemically reacting with air. The push wire type welding gun is the most common wire feeding method in a gas shielded welding machine, and its core feature is that a wire feeding mechanism is installed on a welding machine main machine instead of inside a welding gun. When working, the wire feeding mechanism pushes the welding wire from the machine end to the front end of the welding gun nozzle through a relatively long wire feeding hose.

[0003] However, after long-term use, copper scraps and dust on the surface of the welding wire accumulate in the hose, causing the inner diameter to become smaller and the resistance to increase, resulting in blockage of the wire feeding hose (spring tube).

[0004] At present, the problem of wire feeding hose blockage is solved by disassembling the wire feeding hose from the welding gun, thoroughly blowing it clean with compressed air, or directly replacing the new wire feeding hose. However, the above solutions all require the equipment to be shut down, and the cleaning process requires disassembly and assembly of the wire feeding hose, which consumes a long time and thus affects the production efficiency of the equipment. SUMMARY

[0005] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present application is to provide a push wire type welding gun of a gas shielded welding machine to at least partially solve the problems raised in the background art.

[0006] The technical scheme adopted by the present application is as follows: the present application provides a push wire type welding gun of a gas shielded welding machine, which comprises: a gun head and a cable, the gun head being connected to one end of the cable; a connecting unit connected in series to the cable; a wire feeding hose arranged in the cable and connected to the gun head through the connecting unit; wherein the connecting unit comprises a gas pipe joint and a conductive part, both ends of the gas pipe joint and the conductive part being connected to the cable, so that the gas circuit and the circuit of the cable are in communication; a mounting cavity is arranged at the middle position of the gas pipe joint, a support pipe is mounted in the mounting cavity, a narrowed support part is arranged at the middle position of the support pipe for supporting the wire feeding hose, and gas permeable parts are arranged at both ends of the support part to allow gas to pass through the support pipe; vibration modules are mounted at both ends of the support pipe for driving the support pipe to vibrate.

[0007] Further, the diameter of the enlarged end of the gas permeable part is greater than the inner diameter of the gas pipe joint.

[0008] Further, the air-permeable part comprises a filter screen.

[0009] Further, the air tube joint is provided with an annular guide slope on the inner side of each end.

[0010] Further, the conductive part comprises two wire joints, each of which is arranged at the end of the air tube joint and connected with the cable at the corresponding position, and each of the air tube joint is inserted into the wire joint. The conductive part further comprises an insulating box, and the inner side of the insulating box is provided with a conductive cover capable of wrapping the two wire joints, so that the two wire joints are electrically connected through the conductive cover.

[0011] Further, the cable comprises an air tube, a wire layer and an insulating sheath wrapped in sequence from the inside to the outside, the wire joint is provided with a wire ring groove matched with the wire layer, the wire joint is arranged on the outer side of the air tube, and the wire layer is fixed in the wire ring groove.

[0012] Further, the outer side of the wire joint is provided with a positioning ring groove, and the inner side of the conductive cover is provided with a positioning flange matched with the positioning ring groove, when the conductive cover wraps the outer side of the wire joint, the positioning flange can be placed in the positioning ring groove to limit the axial displacement of the wire joint.

[0013] Further, the insulating box comprises two symmetrical half-tube-shaped insulating covers, and the two sides of the insulating cover are provided with connecting flanges, when the two insulating covers are combined, the connecting flanges at the corresponding positions are matched with each other.

[0014] Further, the connecting unit is provided with a plurality of connecting units, and the plurality of connecting units are uniformly arranged along the length direction of the cable.

[0015] Further, the two ends of the insulating cover are provided with sealing pads, when the two insulating covers are combined, the insulating cover and the insulating sheath can be sealed by the sealing pads.

[0016] Beneficial effects: 1. By arranging a plurality of connecting units distributed along the cable, and arranging a support tube capable of vibrating inside the connecting unit, the support tube drives the wire feeding hose to vibrate, so that the copper scraps and dust in the wire feeding hose fall off, and the gap generated when the wire feeding hose bends is used to make the fallen copper scraps and dust fall into the air tube through the gap, so as to realize online cleaning of the wire feeding hose and prolong the replacement cycle of the wire feeding hose.

[0017] 2. By setting the support tube as a narrow support section and an expanded vent section, and setting the vent section as a filter screen, copper shavings and dust falling into the air tube will be carried forward by the airflow. When it is transported to the next connection unit, the protective gas is filtered by the filter screen and continues to be transported through the filter screen, while the copper shavings and dust are filtered by the filter screen. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a pusher-type welding torch for a gas shielded welding machine according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the connecting unit in a pusher-type welding torch of a gas shielded welding machine according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the connecting unit in a pusher-type welding torch of a gas shielded welding machine according to an embodiment of the present invention; Figure 4 This is a structural breakdown diagram of the connecting unit in a pusher-type welding torch of a gas shielded welding machine according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the internal structure of the gas pipe connector in a push-wire welding torch of a gas shielded welding machine according to an embodiment of the present invention. Figure 6 This is a schematic diagram illustrating the flow direction of the protective gas inside the gas pipe joint in a push-wire welding torch of a gas shielded welding machine, as proposed in an embodiment of the present invention.

[0019] Among them, 100 is the gun head; 200 is the cable; 201 is the air tube; 202 is the conductor layer; 203 is the insulating sheath; 300 is the connecting unit; 400 is the wire feeding hose; 1 is the air tube connector; 101 is the mounting cavity; 102 is the guide slope; 11 is the support tube; 12 is the vibration module; 2 is the conductor connector; 21 is the wiring ring groove; 22 is the positioning ring groove; 3 is the insulating box; 31 is the insulating cover; 32 is the connecting flange; 33 is the sealing gasket; 4 is the conductive cover; and 41 is the positioning flange.

[0020] The accompanying drawings are provided to further understand the embodiments and form part of the specification. They are used together with the embodiments for explanation and do not constitute a limitation on the embodiments. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0022] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments.

[0023] In combination Figure 1 As shown in the drawings, the embodiment of the present application provides a gas shielded welding machine push wire type welding gun, which comprises a gun head 100, a cable 200 and a wire feeding hose 400, the gun head 100 is connected to one end of the cable 200, and the other end of the cable 200 is connected with a power source, a wire feeder and a gas source.

[0024] The cable 200 comprises a gas pipe 201, a wire layer 202 and an insulating sheath 203 which are covered in sequence from inside to outside, wherein the two ends of the gas pipe 201 are respectively connected with the gun head 100 and the gas source, and the gas source delivers protective gas to the gun head 100 through the gas pipe 201 to avoid oxidation of the molten pool during welding.

[0025] The two ends of the wire layer 202 are respectively connected with the gun head 100 and the power source, and the power source supplies power to the gun head 100 through the wire layer 202 to melt the welding wire for welding.

[0026] It can be understood that the wire layer 202 is woven outside the gas pipe 201, and the cross section thereof is circular.

[0027] Further, the wire feeding hose 400 passes through the inside of the gas pipe 201, and the two ends of the wire feeding hose 400 are respectively connected with the gun head 100 and the wire feeder, and the wire feeder delivers the welding wire to the gun head 100 through the inside of the wire feeding hose 400.

[0028] It should be noted that the outer diameter of the wire feeding hose 400 is smaller than the inner diameter of the gas pipe 201, so that a gap is left between the wire feeding hose 400 and the gas pipe 201 to facilitate the smooth delivery of the protective gas.

[0029] In combination Figure 1 And Figure 2 As shown in the drawings, a plurality of connection units 300 are connected in series on the cable 200, that is, the two ends of the connection unit 300 are connected to the cable 200 (as shown in the drawings), and the connection unit 300 is detachably connected to the cable 200. Figure 1

[0030] In combination Figure 3 , Figure 5 And Figure 6 ​As shown, the connecting unit 300 comprises the air pipe joint 1 and the conductive part, both ends of which are connected to the cable 200, so that the air path and the circuit of the cable 200 are communicated.

[0031] The air pipe joint 1 is a tubular structure, both ends of which are connected to the air pipes 201 of the two side cables 200, so that the air pipes 201 are communicated with each other, and the inner diameter of the air pipe joint 1 is larger than the outer diameter of the wire feeding hose 400, so that when the wire feeding hose 400 passes through the inside of the air pipe joint 1, a gap is left between the air pipe joint 1 and the wire feeding hose 400 for the protective gas to pass through, so as to maintain the normal delivery of the protective gas.

[0032] A mounting cavity 101 is arranged at the middle position of the air pipe joint 1, a support pipe 11 is mounted in the mounting cavity 101, a narrowed support part is arranged at the middle position of the support pipe 11, the wire feeding hose 400 passes through the inside of the support pipe 11, the wire feeding hose 400 is supported by the support part, both ends of the support pipe 11 are mounted with vibration modules 12, the vibration modules 12 can drive the support pipe 11 and the wire feeding hose 400 to vibrate, so that the copper scraps and dust in the wire feeding hose 400 fall off, and since the wire feeding hose 400 is a soft hose (spring-like) tightly spirally wound by metal wires, when the wire feeding hose 400 is bent, a gap is generated at the bent part, and the fallen copper scraps and dust fall into the air pipe 201 through the gap.

[0033] In an optional embodiment, the vibration module 12 is a patch vibration motor.

[0034] Further, both ends of the support part are provided with outwardly expanding air permeable parts (as shown in Figure 5 and Figure 6 ), through which the protective gas can pass through the support pipe 11, so as to maintain the delivery of the protective gas.

[0035] The enlarged end diameter of the air permeable part is larger than the inner diameter of the air pipe joint 1, and in the process of inserting the new wire feeding hose 400 into the air pipe 201, the end of the wire feeding hose 400 can smoothly pass through the support pipe 11 guided by the air permeable part.

[0036] As shown in Figure 5 and Figure 6 , the inner diameter of the support part is matched with the outer diameter of the wire feeding hose 400, so that there is no gap between the wire feeding hose 400 and the support part, therefore, the protective gas in the support pipe 1 can only pass through the air permeable part, and the air permeable part comprises a filter screen, and impurities are filtered by the filter screen when the protective gas passes through the filter screen.

[0037] Thus, in use, the vibration module 12 at each connection unit 300 can drive the support tube 11 and the wire feeding hose 400 to vibrate, so that the copper filings and dust in the wire feeding hose 400 fall off. When the operator moves, the wire feeding hose 400 inside the cable 200 also bends, and because the wire feeding hose 400 is a soft hose (spring-like) tightly wound by metal wires, when the wire feeding hose 400 bends, a gap is formed at the bending position, and the copper filings and dust that fall off fall into the air pipe 201 through the gap. While welding, the air pipe 201 has a protective gas flowing therein, so the copper filings and dust that fall into the air pipe 201 are carried forward by the airflow. When transported to the next connection unit 300, the protective gas is filtered by the filter screen, and the protective gas passes through the filter screen for continuous transportation, while the copper filings and dust are filtered by the filter screen, realizing online cleaning of the wire feeding hose 400 and prolonging the replacement cycle of the wire feeding hose 400.

[0038] In combination with Figure 5 and Figure 6 As shown in the drawings, the air pipe joint 1 is provided with a ring-shaped guide slope 102 on the inner side of both ends. When replacing the wire feeding hose 400, the end of the wire feeding hose 400 can be introduced and passed through the air pipe joint 1 under the guidance of the guide slope 102, avoiding the end surface of the air pipe joint 1 from blocking the replacement of the wire feeding hose 400.

[0039] In combination with Figure 3 and Figure 4 As shown in the drawings, the conductive component includes two wire joints 2, which are respectively arranged at both ends of the air pipe joint 1 and connected with the cable 200 at the corresponding positions. The two ends of the air pipe joint 1 are respectively inserted into the two wire joints 2. Specifically, the wire joint 2 is provided with a wire ring groove 21 matched with the wire layer 202. The wire joint 2 is sleeved on the outside of the air pipe 201, and the wire layer 202 is arranged in the wire ring groove 21 and fixed by welding.

[0040] The conductive component further includes an insulating box 3, and the inside of the insulating box 3 is provided with a conductive cover 4 capable of wrapping the two wire joints 2. When the insulating box 3 wraps the outside of the joint, the conductive cover 4 on the inside of the insulating box 3 contacts the two wire joints 2 on the sides, so that the two wire joints 2 are electrically connected through the conductive cover 4.

[0041] Further, the outer side of the wire connector 2 is provided with a positioning ring groove 22, and the inner side of the conductive cover 4 is provided with a positioning flange 41 matched with the positioning ring groove 22. When the two wire connectors 2 are inserted into the tracheal connector 1, the positioning ring groove 22 on the two wire connectors 2 is matched with the position of the positioning flange 41. Therefore, when the conductive cover 4 is wrapped outside the wire connector 2, the positioning flange 41 can be placed in the positioning ring groove 22 to limit the axial displacement of the wire connector 2, so that the wire connector 2 is fixed.

[0042] In combination Figure 4 As shown, the insulation box 3 includes two symmetrical half-circular tubular insulation covers 31, and the two sides of the insulation cover 31 are provided with connecting flanges 32. When the two insulation covers 31 are combined, the connecting flanges 32 at the corresponding positions are attached to each other, and the connecting flanges 32 are provided with corresponding fixing holes. A bolt is passed through the fixing hole, and then a nut is locked to fix the two insulation covers 31.

[0043] When the wire feeding hose 400 needs to be replaced and the filter screen needs to be cleaned after a long time of use, the wire feeding hose 400 is first pulled out, then the insulation cover 31 is disassembled, and the two wire connectors 2 are separated from the tracheal connector 1 (as shown in the state of Figure 4 The tracheal connector 1 is opened, the internal filter screen is cleaned, and after cleaning, the tracheal connector 1, the wire connector 2 and the insulation cover 31 are sequentially installed to restore the electrical connection and the gas connection, and finally the new wire feeding hose 400 is inserted.

[0044] It should be noted that the tracheal connector 1 is composed of two half-circular tubular shells. When the two ends of the tracheal connector 1 are inserted into the two wire connectors 2, the two half-circular tubes are fixed by the wire connectors 2 (as shown in the state of Figure 3 When the wire connector 2 is separated from the tracheal connector 1, the tracheal connector 1 can be opened, and then the internal filter screen is cleaned.

[0045] Further, the two ends of the insulation cover 31 are provided with sealing pads 33. When the two insulation covers 31 are combined, the two sealing pads 33 on the two sides form a ring-shaped sealing ring, so that the gap between the insulation cover 31 and the insulation sheath 203 can be sealed by the sealing pad 33, avoiding the entry of external water vapor into the insulation box 3 to cause circuit leakage.

[0046] The working principle of the present application is as follows: in use, the vibration module 12 at each connection unit 300 can drive the support pipe 11 and the wire feeding hose 400 to vibrate, so that the copper filings and dust in the wire feeding hose 400 fall off. When the cable 200 is bent, the wire feeding hose 400 inside also bends, and since the wire feeding hose 400 is a soft hose (spring-like) tightly spirally wound by metal wires, when the wire feeding hose 400 is bent, a gap is generated at the bent part, and the fallen copper filings and dust fall into the air pipe 201 through the gap. While welding, the protective gas flows in the air pipe 201, so the copper filings and dust falling into the air pipe 201 are carried forward by the airflow. When transported to the next connection unit 300, the protective gas is filtered by the filter screen, the protective gas continues to be transported through the filter screen, and the copper filings and dust are filtered by the filter screen, realizing online cleaning of the wire feeding hose 400 and prolonging the replacement cycle of the wire feeding hose 400.

[0047] When the wire feeding hose 400 and the filter screen need to be replaced and cleaned after a long time of use, the wire feeding hose 400 is first pulled out, then the insulating cover 31 is disassembled, and the two wire connectors 2 are disconnected from the air pipe connector 1 (as shown in the state of Figure 4 Finally, the air pipe connector 1 is opened, the internal filter screen is cleaned, and after cleaning, the air pipe connector 1, the wire connector 2, and the insulating cover 31 are sequentially installed to restore the electrical connection and gas connection, and finally the new wire feeding hose 400 is inserted.

[0048] In summary of the above embodiments: by arranging multiple connection units 300 distributed along the cable 200, and arranging a support pipe 11 that can vibrate inside the connection unit 300, the wire feeding hose 400 is vibrated by the support pipe 11 to make the copper filings and dust inside the wire feeding hose 400 fall off, and the gap generated when the wire feeding hose 400 is bent is used to make the fallen copper filings and dust fall into the air pipe 201, realizing online cleaning of the wire feeding hose 400 and prolonging the replacement cycle of the wire feeding hose 400.

[0049] By setting the support pipe 11 as a narrowed support part and an expanded air permeable part, and setting the air permeable part as a filter screen, the copper filings and dust falling into the air pipe 201 are carried forward by the airflow, and when transported to the next connection unit 300, the protective gas is filtered by the filter screen, the protective gas continues to be transported through the filter screen, and the copper filings and dust are filtered by the filter screen.

[0050] It is to be noted that, as used in this document, the term "indicia" is intended to encompass any type of data, information, or other content, whether in the form of text, graphics, images, video, audio, or otherwise. It is to be further noted that, as used in this document, the terms "coupled" and "connected," along with derivatives thereof, can be used to mean one or more of the following: in electrical communication with; physically contacting with; in long-distance communication with; and / or not in direct contact with. It is to be further noted that, as used in this document, the terms "include" and "comprise," along with derivatives thereof, can be used to indicate inclusion of one or more elements or steps; these terms are not intended to, nor do they, imply that any or all functionality can be included with any or all elements or steps; and / or any such elements or steps are each independently repeatable both logically and temporally.

[0051] The above description of the embodiments has been presented for the purpose of illustration and description, and is not intended to be limiting; the description is not exhaustive and does not limit the scope of the application to the precise forms disclosed. Many modifications and variations are possible in light of this disclosure without departing from the intended scope of the application. It is intended that the scope of the application be defined by the claims appended hereto.

Claims

1. A push-wire welding torch for a gas shielded welding machine, characterized in that, include: A gun head (100) and a cable (200), wherein the gun head (100) is connected to one end of the cable (200); A connecting unit (300) is connected in series with the cable (200); A wire feeding hose (400) is disposed inside the cable (200) and passes through the connecting unit (300) to be connected to the gun head (100); The connection unit (300) includes an air pipe connector (1) and a conductive component. Both ends of the air pipe connector (1) and the conductive component are connected to the cable (200) so that the air passage and the electrical passage of the cable (200) are connected. An installation cavity (101) is provided at the middle position of the air pipe connector (1). A support tube (11) is installed in the installation cavity (101). A vibration module (12) is installed on the support tube (11). A narrowed support part is provided at the middle position of the support tube (11) to support the wire feeding hose (400). Both ends of the support part are provided with outwardly expanding vents so that gas can pass through the support tube (11).

2. The push-wire welding torch for a gas-shielded welding machine according to claim 1, characterized in that: The enlarged end diameter of the vent is larger than the inner diameter of the air pipe connector (1).

3. The push-wire welding torch for a gas-shielded welding machine according to claim 1, characterized in that: The air-permeable part includes a filter screen.

4. The push-wire welding torch for a gas-shielded welding machine according to claim 1, characterized in that: Both ends of the tracheal connector (1) are provided with annular guide slopes (102).

5. The push-wire welding torch for a gas-shielded welding machine according to claim 1, characterized in that: The conductive component includes two wire connectors (2), which are respectively disposed at both ends of the tracheal connector (1) and connected to the cable (200) at the corresponding positions. Both ends of the tracheal connector (1) are respectively inserted into the two wire connectors (2). The conductive component also includes an insulating box (3), and the inner side of the insulating box (3) is provided with a conductive cover (4) that can wrap the two wire connectors (2) so that the two wire connectors (2) are electrically connected through the conductive cover (4).

6. The push-wire welding torch for a gas-shielded welding machine according to claim 5, characterized in that: The cable (200) includes an air tube (201), a conductor layer (202) and an insulating sheath (203) wrapped from the inside out. The conductor connector (2) is provided with a wiring ring groove (21) that is compatible with the conductor layer (202). The conductor connector (2) is sleeved on the outside of the air tube (201), and the conductor layer (202) is fixed in the wiring ring groove (21).

7. The push-wire welding torch for a gas-shielded welding machine according to claim 5, characterized in that: The outer side of the wire connector (2) is provided with a positioning ring groove (22), and the inner side of the conductive cover (4) is provided with a positioning flange (41) that is adapted to the positioning ring groove (22). When the conductive cover (4) wraps around the outer side of the wire connector (2), the positioning flange (41) can be placed in the positioning ring groove (22) to limit the axial displacement of the wire connector (2).

8. The push-wire welding torch for a gas-shielded welding machine according to claim 6, characterized in that: The insulating box (3) includes two symmetrically arranged semi-circular tubular insulating covers (31). Both sides of the insulating cover (31) are provided with connecting flanges (32). When the two insulating covers (31) are combined, the connecting flanges (32) at corresponding positions fit together.

9. The push-wire welding torch for a gas-shielded welding machine according to claim 1, characterized in that: Multiple connection units (300) are provided, and the multiple connection units (300) are evenly arranged along the length direction of the cable (200).

10. The push-wire welding torch for a gas-shielded welding machine according to claim 8, characterized in that: The insulating cover (31) is provided with sealing gaskets (33) at both ends. When two insulating covers (31) are combined, the insulating cover (31) and the insulating sleeve (203) can be sealed by the sealing gaskets (33).

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