Gas protection device for welding wires and welding rods

Abstract

The invention provides a welding wire and welding rod gas protection device, and belongs to the technical field of welding machining.The welding wire and welding rod gas protection device comprises a material conveying pipe, a first plate body, a second plate body, a conveying assembly and a first recycling assembly, and the first plate body and the second plate body are fixedly arranged on the two sides of the bottom of the material conveying pipe; a first U-shaped surrounding plate is fixedly arranged on the edge of the bottom of the first plate body, a first cavity is formed in the first plate body and the first U-shaped surrounding plate, an air inlet pipe communicated with the first cavity is arranged on the upper portion of the second plate body, and a plurality of air blowing holes are formed in the inner wall of the first U-shaped surrounding plate. A second cavity is formed in the second plate body, and a plurality of backflow holes communicating with the second cavity are formed in the bottom of the second plate body. Compared with the prior art, in the welding process, the protective gas can be recycled, so that the consumption of the protective gas is reduced, the pollution phenomenon is relieved, and the economical efficiency and the environmental protection property are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of welding processing, and specifically relates to a gas protection device for welding wires and welding rods. Background Art

[0002] Currently, when using welding wires and welding rods as welding fillers for welding, due to the heat conduction of the metal, the welding wires and welding rods will also become high-temperature bodies. In a high-temperature environment, the metal will inevitably oxidize, resulting in material instability. Therefore, a gas atmosphere protection is usually adopted at the welding position during welding.

[0003] In the prior art, when using a gas atmosphere protection at the welding position, the shielding gas is usually blown to the welding position by means of side blowing or direct blowing to isolate the air and prevent oxidation at the welding position due to the presence of air. However, after the shielding gas is blown to the welding position, most of it is directly allowed to escape into the surrounding environment. The direct escape of the shielding gas not only causes a large waste, but also causes certain environmental pollution. Summary of the Invention

[0004] Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the embodiments of the present invention is to provide a gas protection device for welding wires and welding rods.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: A gas protection device for welding wires and welding rods, comprising a feeding pipe, a first plate body, a second plate body, a conveying assembly, and a first recovery assembly. The first plate body and the second plate body are fixedly arranged on both sides of the bottom of the feeding pipe. A first U-shaped enclosing plate is fixedly arranged at the bottom edge of the first plate body. A first chamber is formed inside the first plate body and the first U-shaped enclosing plate. An air inlet pipe communicating with the first chamber is arranged on the upper part of the first plate body. A plurality of air blowing holes are formed on the inner wall of the first U-shaped enclosing plate. A second chamber is formed inside the second plate body. A plurality of return holes communicating with the second chamber are formed at the bottom of the second plate body. The conveying assembly is installed on the upper part of the second plate body and is used to drive the welding wire to move along the inside of the feeding pipe. One end of the first recovery assembly is communicated with the second chamber, and the other end is communicated with the air inlet pipe. The first recovery assembly is used to recover the shielding gas acting on the welding position and convey the recovered shielding gas into the air inlet pipe.

[0006] As a further improvement of the present invention: a driven wheel is rotatably arranged on the inner wall of the feeding pipe. The conveying assembly includes a motor, a driving wheel, a support plate, and a rotating shaft. The support plate is fixedly installed on the upper part of the second plate body. The motor is fixedly arranged on the side wall of the support plate. The rotating shaft is installed at the output end of the motor. The driving wheel is fixedly arranged outside the rotating shaft, and a part of the driving wheel extends into the inside of the material conveying pipe.

[0007] As a further improvement of the present invention: a first incomplete gear is fixedly arranged outside the rotating shaft. The first recovery component includes a first cylinder, a first piston rod, a first elastic member, a first recovery pipe, a first piston plate, a first one-way valve plate and a first rack. The first cylinder is fixedly arranged on the upper part of the second plate body and communicates with the second chamber. The first piston plate is movably arranged inside the first cylinder. One end of the first piston rod is fixedly connected to the first piston plate, and the other end extends above the first cylinder. The first rack is fixedly installed on the side wall of the first piston rod and can mesh with the first incomplete gear. One end of the first elastic member is connected to the first piston plate, and the other end is connected to the inner top wall of the first cylinder for providing elastic support to the first piston plate. The first one-way valve plate is arranged below the first piston plate and is hinged to the inner wall of the first cylinder. One end of the first recovery pipe is connected to the first cylinder, and the other end is connected to the air inlet pipe. A first one-way valve is arranged inside the first recovery pipe.

[0008] As a further improvement of the present invention: a first hot copper mesh is arranged inside the first cylinder at a position below the first one-way valve plate.

[0009] As a further improvement of the present invention: a second recovery component is further arranged on the upper part of the second plate body. When the first elastic member pushes the first piston plate to move downward inside the first cylinder, the second recovery component is used to further recover the protective gas below the second plate body and further transport the recovered protective gas into the air inlet pipe.

[0010] As a further improvement of the present invention: a second incomplete gear is fixedly arranged outside the rotating shaft. The second recovery component includes a second cylinder, a second piston rod, a second elastic member, a second recovery pipe, a second piston plate, a second one-way valve plate and a second rack. The second cylinder is fixedly arranged on the upper part of the second plate body and communicated with the second chamber. The second piston plate is movably arranged inside the second cylinder. One end of the second piston rod is fixedly connected to the second piston plate, and the other end extends above the second cylinder. The second rack is fixedly installed on the side wall of the second piston rod and can mesh with the second incomplete gear. One end of the second elastic member is connected to the second piston plate, and the other end is connected to the inner top wall of the second cylinder, for providing elastic support to the second piston plate. The second one-way valve plate is arranged below the second piston plate and is hinged to the inner wall of the second cylinder. One end of the second recovery pipe is connected to the second cylinder, and the other end is connected to the intake pipe. A second one-way valve is arranged inside the second recovery pipe.

[0011] As a further improvement of the present invention: a second hot copper mesh is arranged inside the second cylinder at a position below the second one-way valve plate.

[0012] As a further improvement of the present invention: the first elastic member and the second elastic member are springs or metal shrapnel.

[0013] As a further improvement of the present invention: a second U-shaped enclosing plate is fixedly arranged at the bottom edge of the second plate body. A rectangular frame structure is formed between the second U-shaped enclosing plate and the first U-shaped enclosing plate.

[0014] As a further improvement of the present invention: the protective gas is argon or carbon dioxide.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In the embodiments of the present invention, during welding, the wire feeding assembly is used to drive the welding wire to move inside the material conveying pipe, so that one end of the welding wire continuously extends from the bottom of the material conveying pipe and acts on the welding position, thereby completing the welding operation. During the welding process, the shielding gas is conveyed into the first chamber inside the first plate body via the air inlet pipe by an external gas supply device, and then output through a plurality of air blowing holes on the inner wall of the first U-shaped enclosure, and then side-blown against the welding position, so that a gas protection layer is presented at the welding position, thereby isolating the air and avoiding the oxidation phenomenon at the welding position, improving the welding quality; after the side-blown shielding gas passes over the welding position, it can flow to the bottom of the first plate body. At this time, the first recovery assembly recovers the shielding gas flowing to the bottom of the first plate body into the second chamber via a plurality of return holes, and then conveys it from the second chamber into the air inlet pipe. When the recovered shielding gas enters the air inlet pipe, it can be mixed with the shielding gas subsequently conveyed into the air inlet pipe by the external gas supply device, realizing the recycling of the shielding gas. Compared with the prior art, during the welding process, the shielding gas can be recovered and utilized, thereby reducing the consumption of the shielding gas, reducing the pollution phenomenon, and improving the economy and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a wire welding rod gas protection device Figure 1 ; Figure 2 is a schematic structural diagram of a wire welding rod gas protection device Figure 2 ; Figure 3 is a schematic structural diagram of a wire welding rod gas protection device Figure 3 ; Figure 4 is Figure 1 an enlarged schematic diagram of area A in Figure 5 is Figure 1 an enlarged schematic diagram of area B in Figure 6 is Figure 1 an enlarged schematic diagram of area C in Figure 7 is Figure 2 an enlarged schematic diagram of area D in In the figure: 10 - material conveying pipe, 101 - driven wheel, 20 - first plate body, 201 - intake pipe, 202 - first chamber, 203 - first U-shaped enclosure, 204 - air blowing hole, 30 - second plate body, 301 - second chamber, 302 - return hole, 303 - second U-shaped enclosure, 40 - conveying assembly, 401 - motor, 402 - driving wheel, 403 - support plate, 404 - rotating shaft, 405 - first incomplete gear, 406 - second incomplete gear, 50 - first recovery assembly, 501 - first cylinder, 502 - first piston rod, 503 - first elastic member, 504 - first recovery pipe, 505 - first piston plate, 506 - first one-way valve plate, 507 - first hot copper mesh, 508 - first rack, 60 - second recovery assembly, 601 - second cylinder, 602 - second piston rod, 603 - second elastic member, 604 - second recovery pipe, 605 - second piston plate, 606 - second one-way valve plate, 607 - second hot copper mesh, 608 - second rack. Detailed implementation manners

[0017] The technical solutions of the present invention will be further described in detail below in conjunction with the specific implementation manners.

[0018] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. 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 present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0020] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection", "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Please refer to Figure 1 、 Figure 2 and Figure 3, this embodiment provides a gas protection device for a welding wire and a welding rod, including a material conveying pipe 10, a first plate body 20, a second plate body 30, a conveying assembly 40, and a first recovery assembly 50. The first plate body 20 and the second plate body 30 are fixedly arranged on both sides of the bottom of the material conveying pipe 10. A first U-shaped enclosing plate 203 is fixedly arranged at the bottom edge of the first plate body 20. A first chamber 202 is formed inside the first plate body 20 and the first U-shaped enclosing plate 203. An air inlet pipe 201 communicating with the first chamber 202 is arranged on the upper part of the first plate body 20. A plurality of air blowing holes 204 are formed on the inner wall of the first U-shaped enclosing plate 203. A second chamber 301 is formed inside the second plate body 30. A plurality of return holes 302 communicating with the second chamber 301 are formed at the bottom of the second plate body 30. The conveying assembly 40 is installed on the upper part of the second plate body 30 and is used to drive the welding wire to move inside the material conveying pipe 10. One end of the first recovery assembly 50 communicates with the second chamber 301, and the other end communicates with the air inlet pipe 201. It is used to recover the protective gas acting on the welding position and convey the recovered protective gas into the air inlet pipe 201.

[0022] During welding, the conveying assembly 40 drives the welding wire to move inside the material conveying pipe 10, so that one end of the welding wire continuously extends from the bottom of the material conveying pipe 10 and acts on the welding position, thereby completing the welding operation. During the welding process, the protective gas is conveyed into the first chamber 202 inside the first plate body 20 through the air inlet pipe 201 by an external gas supply device (not shown in the figure), and then output through a plurality of air blowing holes 204 on the inner wall of the first U-shaped enclosing plate 203, and then laterally blows the welding position, so that a gas protection layer appears at the welding position, thereby isolating the air and avoiding oxidation at the welding position and improving the welding quality; after the laterally blown protective gas passes over the welding position, it can flow to the bottom of the first plate body 30. At this time, the first recovery assembly 50 recovers the protective gas flowing to the bottom of the first plate body 30 into the second chamber 301 through a plurality of return holes 302, and then conveys it from the second chamber 301 into the air inlet pipe 201. When the recovered protective gas enters the air inlet pipe 201, it can be mixed with the protective gas subsequently conveyed into the air inlet pipe 201 by the external gas supply device, realizing the reuse of the protective gas.

[0023] Please refer to Figure 1 , Figure 2 , Figure 4 and Figure 5, in one embodiment, a driven wheel 101 is rotatably provided on the inner wall of the feed pipe 10. The conveying assembly 40 includes a motor 401, a driving wheel 402, a support plate 403 and a rotating shaft 404. The support plate 403 is fixedly installed on the upper part of the second plate body 30. The motor 401 is fixedly arranged on the side wall of the support plate 403. The rotating shaft 404 is installed at the output end of the motor 401. The driving wheel 402 is fixedly arranged outside the rotating shaft 404, and a part of the driving wheel 402 extends into the feed pipe 10.

[0024] During welding, one end of the welding wire can be inserted into the feed pipe 10 from the top of the feed pipe 10, and then one end of the welding wire is passed out from the bottom of the feed pipe 10. At this time, the welding wire passes through between the driving wheel 402 and the driven wheel 101 inside the feed pipe 10. The motor 401 drives the rotating shaft 404 to rotate, and then drives the driving wheel 402 to rotate. When the driving wheel 402 rotates, it drives the welding wire to move downward along the inside of the feed pipe 10 through the frictional force with the welding wire. At this time, the driven wheel 101 rotates synchronously under the influence of the friction during the movement of the welding wire, so as to realize the conveying of the welding wire.

[0025] Please refer to Figure 5 and Figure 6 , in one embodiment, a first incomplete gear 405 is fixedly arranged outside the rotating shaft 404. The first recovery assembly 50 includes a first cylinder 501, a first piston rod 502, a first elastic member 503, a first recovery pipe 504, a first piston plate 505, a first one-way valve plate 506 and a first rack 508. The first cylinder 501 is fixedly arranged on the upper part of the second plate body 30 and communicates with the second chamber 301. The first piston plate 505 is movably arranged inside the first cylinder 501. One end of the first piston rod 502 is fixedly connected to the first piston plate 505, and the other end extends above the first cylinder 501. The first rack 508 is fixedly installed on the side wall of the first piston rod 502 and can be engaged with the first incomplete gear 405. One end of the first elastic member 503 is connected to the first piston plate 505, and the other end is connected to the inner top wall of the first cylinder 501, and is used to provide elastic support for the first piston plate 505. The first one-way valve plate 506 is arranged below the first piston plate 505 and is hinged to the inner wall of the first cylinder 501. One end of the first recovery pipe 504 is connected to the first cylinder 501, and the other end is connected to the air inlet pipe 201. A first one-way valve (not shown in the figure) is arranged inside the first recovery pipe 504.

[0026] When the motor 401 drives the driving wheel 402 to rotate through the rotating shaft 404 to convey the welding wire, the rotating shaft 404 can also drive the first incomplete gear 405 to rotate. When the first incomplete gear 405 meshes with the first rack 508, it can drive the first piston rod 502 to move upward. The first piston rod 502 drives the first piston plate 505 to move upward along the inside of the first cylinder 501. At this time, the first one-way valve plate 506 opens, the first one-way valve closes, and the first elastic member 503 is compressed under force. The first piston plate 505 extracts the shielding gas flowing to the area below the second plate body 30 through a plurality of return holes 302 at the bottom of the second plate body 30 into the first chamber 301, and then extracts it from the first chamber 301 into the first cylinder 501. When the first incomplete gear 405 disengages from the first rack 508, the first elastic member 503 pushes the first piston plate 505 to move downward along the inside of the first cylinder 501. At this time, the first one-way valve plate 506 closes, the first one-way valve opens, and the first piston plate 505 presses the shielding gas inside the first cylinder 501 into the intake pipe 201 through the first recovery pipe 504, and then mixes it with the shielding gas flowing along the inside of the intake pipe 201 subsequently, realizing the recycling of the shielding gas.

[0027] Please refer to Figure 6 , in one embodiment, a first hot copper mesh 507 is provided at a position below the first one-way valve plate 506 inside the first cylinder 501.

[0028] When the first piston plate 505 moves upward along the inside of the first cylinder 501 and thus extracts the shielding gas flowing to the area below the second plate body 30 from a plurality of return holes 302 and the second chamber 301 into the first cylinder 501, the shielding gas can pass through the first hot copper mesh 507. At this time, the first hot copper mesh 507 can react with a small amount of air doped in the shielding gas, and thus remove the small amount of air, so that the shielding gas pressed into the intake pipe 201 subsequently does not contain doped air, thereby improving the purity of the shielding gas and further improving the shielding effect at the welding position.

[0029] Since after the first incomplete gear 405 disengages from the first rack 508, the first elastic member 503 drives the first piston plate 505 to move downward along the inside of the first cylinder 501, at this time, the subsequent shielding gas flowing to the area below the second plate body 30 cannot be effectively recovered, resulting in a certain amount of leakage of the shielding gas. To avoid this situation, please refer to Figure 1 and Figure 2, in one embodiment, a second recovery assembly 60 is further provided on the upper part of the second plate body 30. When the first elastic member 503 pushes the first piston plate 505 to move downward along the inside of the first cylinder 501, the second recovery assembly 60 is configured to further recover the protective gas below the second plate body 30 and further transport the recovered protective gas into the inside of the intake pipe 201, thereby reducing the escape of the protective gas and improving the recovery effect of the protective gas.

[0030] Please refer to Figure 7 , in one embodiment, a second incomplete gear 406 is fixedly provided on the outside of the rotating shaft 404. The second recovery assembly 60 includes a second cylinder 601, a second piston rod 602, a second elastic member 603, a second recovery pipe 604, a second piston plate 605, a second one-way valve plate 606, and a second rack 608. The second cylinder 601 is fixedly provided on the upper part of the second plate body 30 and communicates with the second chamber 301. The second piston plate 605 is movably disposed inside the second cylinder 601. One end of the second piston rod 602 is fixedly connected to the second piston plate 605, and the other end extends above the second cylinder 601. The second rack 608 is fixedly installed on the side wall of the second piston rod 602 and can mesh with the second incomplete gear 406. One end of the second elastic member 603 is connected to the second piston plate 605, and the other end is connected to the inner top wall of the second cylinder 601 for providing elastic support to the second piston plate 605. The second one-way valve plate 606 is disposed below the second piston plate 605 and is hingedly connected to the inner wall of the second cylinder 601. One end of the second recovery pipe 604 is connected to the second cylinder 601, and the other end is connected to the intake pipe 201. A second one-way valve (not shown in the figure) is provided inside the second recovery pipe 604.

[0031] When the motor 401 drives the first incomplete gear 405 to rotate through the rotating shaft 404, the rotating shaft 404 can also drive the second incomplete gear 406 to rotate. When the first incomplete gear 405 disengages from the first rack 508 and the first elastic member 503 pushes the first piston plate 505 to move downward inside the first cylinder 501, the second incomplete gear 406 engages with the second rack 608, thereby driving the second piston rod 602 to move upward. The second piston rod 602 drives the second piston plate 605 to move upward inside the second cylinder 601. At this time, the second one-way valve plate 606 opens, the second one-way valve closes, and the second elastic member 603 is compressed. The second piston plate 605 extracts the protective gas flowing to the area below the second plate body 30 through a plurality of return holes 302 at the bottom of the second plate body 30 into the second chamber 301, and then extracts it from the second chamber 301 into the second cylinder 601. When the second incomplete gear 406 disengages from the second rack 608, the second elastic member 603 pushes the second piston plate 605 to move downward inside the second cylinder 601. At this time, the second one-way valve plate 606 closes, the second one-way valve opens, and the second piston plate 605 presses the protective gas inside the second cylinder 601 into the intake pipe 201 through the second recovery pipe 604, and then mixes it with the protective gas flowing along the inside of the intake pipe 201, realizing the recycling of the protective gas; through the alternating meshing action between the first incomplete gear 405 and the first rack 508 and between the second incomplete gear 406 and the second rack 608, the protective gas below the first plate body 30 can be continuously and uninterruptedly extracted, thereby realizing the continuous recovery of the protective gas, and further improving the recovery effect of the protective gas.

[0032] Please refer to Figure 7 , in one embodiment, a second hot copper mesh 607 is provided at a position below the second one-way valve plate 606 inside the second cylinder 601.

[0033] When the second piston plate 605 moves upward inside the second cylinder 601 and extracts the protective gas flowing to the area below the second plate body 30 from a plurality of return holes 302 and the second chamber 301 into the second cylinder 601, the protective gas can pass through the second hot copper mesh 607. At this time, the second hot copper mesh 607 can react with a small amount of air doped in the protective gas, thereby removing the small amount of air, so that the protective gas pressed into the intake pipe 201 subsequently does not contain doped air, thereby improving the purity of the protective gas, and further improving the protection effect at the welding position.

[0034] By setting the first hot copper mesh 507 and the second hot copper mesh 607, a heating effect can also be produced for the recovered shielding gas. When the heated shielding gas is pressed into the air inlet pipe 201 via the first recovery pipe 504 and the second recovery pipe 604 and participates in the subsequent protection operation of the welding position, a certain degree of heating and heat preservation treatment can be performed on the welding position, thereby slowing down the cooling speed of the welding position, avoiding the formation of hardened structure at the welding position and the heat-affected zone, and thus preventing the generation of cracks.

[0035] In one embodiment, the first elastic member 503 and the second elastic member 603 may be springs or metal springs, which are not limited herein.

[0036] See also Figure 3 In one embodiment, a second U-shaped enclosure 303 is fixedly provided on the bottom edge of the second plate body 30, and a rectangular frame structure is formed between the second U-shaped enclosure 303 and the first U-shaped enclosure 203. After the shielding gas passes over the welding position, the setting of the rectangular frame structure can produce a certain containment effect for the side-blown shielding gas, so as to reduce the possibility of shielding gas escaping, thereby further improving the shielding gas recovery effect.

[0037] In one embodiment, the protective gas may be argon or carbon dioxide, which is not limited herein.

[0038] The working principle of the present invention is as follows: First, one end of the welding wire is inserted into the interior of the feeding pipe 10 from the top of the feeding pipe 10, and one end of the welding wire passes through the bottom of the feeding pipe 10. At this time, the part of the welding wire inside the feeding pipe 10 is clamped by the driving wheel 402 and the driven wheel 101. Subsequently, the motor 401 is started. The motor 401 drives the rotating shaft 404 to rotate, and then drives the driving wheel 402, the first incomplete gear 405, and the second incomplete gear 406 to rotate. When the driving wheel 402 rotates, it drives the welding wire to move along the interior of the feeding pipe 10 through the frictional force with the welding wire, realizing the wire feeding process of the welding wire. During the wire feeding process of the welding wire, an external gas supply device transports the shielding gas to the interior of the first chamber 202 inside the first plate body 20 through the air inlet pipe 201, and then blows it out through a plurality of air blowing holes 204, and then acts laterally on the welding position to realize the gas shielding of the welding position; when the first incomplete gear 405 rotates to mesh with the first rack 508, the second incomplete gear 406 is disengaged from the second rack 608. At this time, the first incomplete gear 405 drives the first piston rod 502 and the first piston plate 505 to move upward through the meshing action with the first rack 508. The first piston plate 505 extracts the shielding gas flowing below the second plate body 30 into the second chamber 301 through a plurality of return holes 302, and then extracts it from the second chamber 301 into the first cylinder 501. When the first incomplete gear 405 is disengaged from the first rack 508, the second incomplete gear 406 meshes with the second rack 608. The first elastic member 503 pushes the first piston plate 505 downward, and at the same time, the second incomplete gear 406 drives the second piston rod 602 and the second piston plate 605 to move upward. When the first piston plate 505 moves downward, it presses the shielding gas inside the first cylinder 501 into the air inlet pipe 201 through the first recovery pipe 504. When the second piston plate 605 moves upward, it continuously extracts the subsequent shielding gas flowing below the second plate body 30 into the second chamber 301 through a plurality of return holes 302, and then extracts it from the second chamber 301 into the second cylinder 601 until the first incomplete gear 405 meshes with the first rack 508 again... and so on in a cycle. The shielding gas below the second plate body 30 can be continuously extracted and the extracted shielding gas can be continuously transported into the air inlet pipe 201, so as to realize the recycling of the shielding gas.

[0039] In the embodiment of the present invention, during welding, the wire feeder 40 drives the welding wire to move inside the material conveying pipe 10, so that one end of the welding wire continuously extends from the bottom of the material conveying pipe 10 and acts on the welding position, thereby completing the welding operation. During the welding process, the shielding gas is conveyed to the inside of the first chamber 202 inside the first plate body 20 through the air inlet pipe 201 by an external gas supply device (not shown in the figure), and then output through a plurality of air blowing holes 204 on the inner wall of the first U-shaped enclosing plate 203, and then the welding position is side-blown, so that a gas protection layer is presented at the welding position, thereby isolating the air and avoiding the oxidation phenomenon at the welding position and improving the welding quality; after the side-blown shielding gas passes over the welding position, it can flow to the bottom of the first plate body 30. At this time, the first recovery component 50 recovers the shielding gas flowing to the bottom of the first plate body 30 to the inside of the second chamber 301 through a plurality of return holes 302, and then conveys it to the inside of the air inlet pipe 201 by the second chamber 301. When the recovered shielding gas enters the inside of the air inlet pipe 201, it can be mixed with the shielding gas subsequently conveyed to the inside of the air inlet pipe 201 by the external gas supply device, realizing the recycling of the shielding gas. Compared with the prior art, during the welding process, the shielding gas can be recycled, thereby reducing the consumption of the shielding gas, reducing the pollution phenomenon, and improving the economy and environmental protection.

[0040] The above has described the preferred embodiments of the present invention in detail, but the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present invention.

Claims

1. A gas protection device for a welding wire and a welding rod, characterized in that, It includes a material feeding pipe (10), a first plate body (20), a second plate body (30), a conveying assembly (40), and a first recovery assembly (50). The first plate body (20) and the second plate body (30) are fixedly arranged on both sides of the bottom of the material feeding pipe (10). A first U-shaped enclosing plate (203) is fixedly arranged at the bottom edge of the first plate body (20). A first chamber (202) is formed inside the first plate body (20) and the first U-shaped enclosing plate (203). An air inlet pipe (201) communicating with the first chamber (202) is arranged at the upper part of the first plate body (20). A plurality of air blowing holes (204) are formed in the inner wall of the first U-shaped enclosing plate (203). A second chamber (301) is formed inside the second plate body (30). A plurality of return holes (302) communicating with the second chamber (301) are formed at the bottom of the second plate body (30). The conveying assembly (40) is installed at the upper part of the second plate body (30) and is used to drive the welding wire to move along the inside of the material feeding pipe (10). One end of the first recovery assembly (50) communicates with the second chamber (301), and the other end communicates with the air inlet pipe (201). It is used to recover the shielding gas acting on the welding position and convey the recovered shielding gas into the air inlet pipe (201).

2. The gas protection device for a welding wire and welding rod according to claim 1, wherein, A driven wheel (101) is rotatably arranged on the inner wall of the material feeding pipe (10). The conveying assembly (40) includes a motor (401), a driving wheel (402), a support plate (403), and a rotating shaft (404). The support plate (403) is fixedly installed at the upper part of the second plate body (30). The motor (401) is fixedly arranged on the side wall of the support plate (403). The rotating shaft (404) is installed at the output end of the motor (401). The driving wheel (402) is fixedly arranged outside the rotating shaft (404), and a part of the driving wheel (402) extends into the material feeding pipe (10).

3. A wire and electrode gas protection device according to claim 2, characterized in that, A first incomplete gear (405) is fixedly arranged outside the rotating shaft (404). The first recovery assembly (50) includes a first cylinder (501), a first piston rod (502), a first elastic member (503), a first recovery pipe (504), a first piston plate (505), a first one-way valve plate (506), and a first rack (508). The first cylinder (501) is fixedly arranged on the upper part of the second plate body (30) and communicated with the second chamber (301). The first piston plate (505) is movably arranged inside the first cylinder (501). One end of the first piston rod (502) is fixedly connected to the first piston plate (505), and the other end extends above the first cylinder (501). The first rack (508) is fixedly installed on the side wall of the first piston rod (502) and can mesh with the first incomplete gear (405). One end of the first elastic member (503) is connected to the first piston plate (505), and the other end is connected to the inner top wall of the first cylinder (501) for providing elastic support to the first piston plate (505). The first one-way valve plate (506) is arranged below the first piston plate (505) and is hinged to the inner wall of the first cylinder (501). One end of the first recovery pipe (504) is connected to the first cylinder (501), and the other end is connected to the intake pipe (201). A first one-way valve is arranged inside the first recovery pipe (504).

4. A wire welding rod gas protection device according to claim 3, characterized in that, A first hot copper mesh (507) is arranged inside the first cylinder (501) at a position below the first one-way valve plate (506).

5. A wire rod gas protection device according to claim 3, characterized in that, A second recovery assembly (60) is further arranged on the upper part of the second plate body (30). When the first elastic member (503) pushes the first piston plate (505) to move downward along the inside of the first cylinder (501), the second recovery assembly (60) is used to further recover the protective gas below the second plate body (30) and further transport the recovered protective gas into the intake pipe (201).

6. The gas protection device for a welding wire and welding rod according to claim 5, wherein, A second incomplete gear (406) is fixedly arranged outside the rotating shaft (404). The second recovery assembly (60) includes a second cylinder (601), a second piston rod (602), a second elastic member (603), a second recovery pipe (604), a second piston plate (605), a second one-way valve plate (606), and a second rack (608). The second cylinder (601) is fixedly arranged on the upper part of the second plate body (30) and communicated with the second chamber (301). The second piston plate (605) is movably arranged inside the second cylinder (601). One end of the second piston rod (602) is fixedly connected to the second piston plate (605), and the other end extends above the second cylinder (601). The second rack (608) is fixedly installed on the side wall of the second piston rod (602) and can mesh with the second incomplete gear (406). One end of the second elastic member (603) is connected to the second piston plate (605), and the other end is connected to the inner top wall of the second cylinder (601) for providing elastic support to the second piston plate (605). The second one-way valve plate (606) is arranged below the second piston plate (605) and is hinged to the inner wall of the second cylinder (601). One end of the second recovery pipe (604) is connected to the second cylinder (601), and the other end is connected to the intake pipe (201). A second one-way valve is arranged inside the second recovery pipe (604).

7. The gas protection device for a welding wire and welding rod according to claim 6, characterized in that, A second hot copper mesh (607) is arranged inside the second cylinder (601) at a position below the second one-way valve plate (606).

8. A gas protection device for a welding wire and welding rod according to claim 6, characterized in that, The first elastic member (503) and the second elastic member (603) are springs or metal shrapnel.

9. A gas protection device for a welding wire and a welding rod according to claim 1, characterized in that, A second U-shaped enclosing plate (303) is fixedly arranged at the bottom edge of the second plate body (30). A rectangular frame structure is formed between the second U-shaped enclosing plate (303) and the first U-shaped enclosing plate (203).

10. A gas protection device for a welding wire and welding rod according to claim 1, characterized in that, The protective gas is argon or carbon dioxide.

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