Small-space argon arc welding gun with weld joint surface protection cover

Abstract

A small-space argon arc welding gun with a weld surface protective cover is characterized in that the small-space argon arc welding gun comprises an argon arc welding gun body, a hoop, the protective cover and an argon inlet pipe, the argon arc welding gun body comprises a tungsten needle, a porcelain nozzle, a handheld handle and a tail cap, the hoop is connected to the porcelain nozzle, the protective cover is further connected to the hoop, and the argon inlet pipe is connected to the protective cover. The protective cover comprises a cover shell, a rear side plate, a flow dividing hole plate, a blocking edge I and a blocking edge II, the rear side of the cover shell is fixedly connected with the rear side plate, the flow dividing hole plate is arranged on the inner side of the upper cover shell, the blocking edge I and the blocking edge II are arranged on the front side of the cover shell, the blocking edge I is connected to the left side of the cover shell, and the blocking edge II is connected to the right side of the cover shell. An observation opening is formed between the tail end of the blocking edge I and the tail end of the blocking edge II, and an argon inlet pipe is arranged on the outer side of the housing. The device can be used in a narrow space; the angle between the protective cover and the welding gun head is adjustable to flexibly adapt to different welding surfaces; and a plane or a pipeline can be welded.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of argon arc welding related equipment, specifically to a small space argon arc welding gun with weld surface protection cover. BACKGROUND

[0002] During the welding process of part of equipment and facilities, the thin plate welding forming work in narrow space is often involved, and it is difficult for the welding gun to enter the gap during welding, and the argon gas delivery pipe cannot guarantee the uniformity of argon gas in the narrow space.

[0003] In the prior art, in order to protect the weld and the heat affected zone during welding, prevent oxidation, and affect the service life of the product, welding generally adopts tungsten inert gas welding, and when manual tungsten inert gas welding is used, only the gas brought by the manual tungsten inert gas welding gun is used for protection, due to the limitation of the protection area, the weld surface will still be oxidized, and the protection effect cannot meet the requirements. After the oxidation of the weld and the heat affected zone, the plasticity and toughness of the welded joint will decrease sharply, the corrosion resistance will also be poor, and the quality of the equipment cannot be guaranteed.

[0004] The present disclosure discloses a patent with Chinese patent number CN217513036U, which includes a copper protective shell, a copper wire mesh, a copper porous flow divider, a copper gas guide pipe and a fixing plate, the copper protective shell is welded with the copper porous flow divider and the copper wire mesh to form a whole; the top plate of the copper protective shell is provided with an opening and communicates with the copper gas guide pipe; the fixing plate is welded on the copper protective shell at an angle of 45 degrees, the fixing plate is connected with the clamping ring through a screw rod and a nut, and the clamping ring is fastened through a fastening screw.

[0005] The above scheme has the following problems:

[0006] 1. Due to the size of the argon arc welding gun, it is difficult to weld the weld in the narrow space.

[0007] 2. The angle between the protective shell and the argon arc welding gun cannot be changed, and it is difficult to apply in a narrow range.

[0008] 3. Only the weld on the plane can be welded, and the surface of the pipeline cannot be welded.

[0009] Therefore, a small space argon arc welding gun with a weld surface protection cover is designed to extend the technical solution in the above background technology. Utility model content

[0010] Therefore, it is necessary to provide a small space argon arc welding gun with a weld surface protection cover to solve the technical problems mentioned in the above background technology.

[0011] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0012] A small space argon arc welding gun with a weld surface protection cover, comprising an argon arc welding gun body, a clamp, a protection cover and an argon gas inlet pipe, the argon arc welding gun body comprises a tungsten needle, a porcelain nozzle, a hand-held handle and a tail cap, the clamp is connected to the porcelain nozzle, and the clamp is also connected with the protection cover, the protection cover comprises a cover shell, a back plate, a shunt hole plate, a baffle I and a baffle II, the back plate is fixedly connected to the back of the cover shell, the shunt hole plate is arranged on the inner side of the upper cover shell, the front side of the cover shell is provided with the baffle I and the baffle II, the baffle I is connected to the left side of the cover shell, and the baffle II is connected to the right side of the cover shell, an observation port is formed between the end of the baffle I and the end of the baffle II, and the outer side of the cover shell is provided with the argon gas inlet pipe; by arranging the protection cover, the nitrogen gas is uniformly diffused in the weld and the heat-affected zone through the shunt hole plate, the cover shell, the back plate, the baffle I and the baffle II form a semi-closed space with the plane or the elbow of the welding position, so that the argon arc welding gun head is surrounded as much as possible, the argon gas can cover the welding position, and then can escape from the observation port.

[0013] Further, a wave-shaped connecting piece is arranged at the connection between the clamp and the protection cover, which is used for adjusting the angle between the protection cover and the argon arc welding gun, and the wave-shaped connecting piece is made of metal; by arranging the wave-shaped connecting piece, the angle between the argon arc welding gun head and the protection cover can be more freely and flexibly adjusted, and in the weld of a narrow space, a more flexible adjustment mode can be realized, and in the plane, the protection cover can be closer to the welding surface, so that the argon gas is prevented from leaking from the gap, and the protection effect of the argon gas is better.

[0014] Further, a metal wire filling layer is filled between the shunt hole plate and the cover shell; the metal wire filling layer can make the argon gas more uniformly distributed, so that the argon gas is uniformly distributed in the protection cover.

[0015] Further, the length of the argon arc welding gun body from the front end of the porcelain nozzle to the rear end of the tail cap is in the range of 40mm-75mm; reducing the length from the front end of the porcelain nozzle to the rear end of the tail cap can make the argon arc welding gun capable of penetrating into a narrower space, and welding a region which is difficult to be penetrated by the welding gun in the past.

[0016] Further, the back plate is provided with a pipeline groove, which is used for abutting the pipeline when the pipeline is welded; when the pipeline is welded, the pipeline groove can be abutted to the pipeline, so that the argon gas is difficult to leak from the gap between the pipeline and the back plate.

[0017] Further, the observation port is arranged at the front end of the protection cover.

[0018] Further, the observation port is arranged at one side of the protection cover.

[0019] Further, the porcelain nozzle is arranged between the baffle I and the baffle II; the baffle I and the baffle II can surround the porcelain nozzle as much as possible, so that the argon gas can be uniformly dispersed in the weld, and then escapes through the observation port.

[0020] Further, the upper edges of the two stop edges are higher than the lower edge of the porcelain nozzle; by increasing the height of the upper edges of the two stop edges, the gap between the upper edges of the stop edges and the lower edge of the porcelain nozzle is reduced, and the escape of argon gas from the gap is reduced.

[0021] Further, the length of the hand-held handle is between 20mm-2000mm; by increasing the length of the hand-held handle, the length of the longitudinal operation is increased, and the length of the longitudinal operation is increased.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] 1. The length of the argon arc welding gun body from the front end of the porcelain nozzle to the rear end of the tail cap is shortened, the use range of the welding gun is wider, and the welding seam in a narrow space that is difficult for the welding gun to reach in the past can be welded.

[0024] 2. The angle between the argon arc welding gun and the protective cover can be adjusted, the protective cover can adapt to welding surfaces of different angles, and the protection effect of argon gas on the welding seam is better.

[0025] 3. Different rear side plates can be replaced, welding can be performed on a plane, and welding on a pipeline is better by replacing the rear side plate with a pipeline groove. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a front view of the utility model embodiment 1;

[0027] Figure 2 It is a left view of the protective cover of the utility model embodiment 1;

[0028] Figure 3 It is a bottom view of the protective cover of the utility model embodiment 1;

[0029] Figure 4 It is a front view of the utility model embodiment 2;

[0030] Figure 5 It is a left view of the protective cover of the utility model embodiment 2;

[0031] Figure 6 It is a bottom view of the protective cover of the utility model embodiment 2;

[0032] Figure 7 It is a front view of the utility model embodiment 3;

[0033] Figure 8 It is a bottom view of the protective cover of the utility model embodiment 3;

[0034] Figure 9 It is a bottom view of the protective cover of the utility model embodiment 4;

[0035] Figure 10 is a side view of the argon arc welding gun body;

[0036] In the figure, 1 is an argon arc welding gun body, 101 is a tungsten needle, 102 is a porcelain nozzle, 103 is a hand-held handle, 104 is a tail cap, 2 is a clamp, 201 is a connecting piece, 202 is a wave-shaped connecting piece, 3 is a protective cover, 301 is a cover shell, 302 is a back plate, 3021 is a pipeline groove, 303 is a shunt hole plate, 304 is a baffle I, 305 is a baffle II, 306 is an observation port, 307 is a metal wire filler layer, and 4 is an argon gas inlet pipe. DETAILED DESCRIPTION

[0037] Example 1

[0038] A small space argon arc welding gun with a weld surface protective cover comprises an argon arc welding gun body 1, a clamp 2, a protective cover 3, and an argon gas inlet pipe 4, the argon arc welding gun body 1 comprises a tungsten needle 101, a porcelain nozzle 102, a hand-held handle 103, and a tail cap 104, the length of the argon arc welding gun body 1 from the front end of the porcelain nozzle 102 to the rear end of the tail cap 104 is 75 mm, and the length of the hand-held handle 103 is 1500 mm.

[0039] The clamp 2 is connected to the porcelain nozzle 102, and the protective cover 3 is further connected to the clamp 2, a connecting piece 201 is arranged at the connecting position of the clamp 2 and the protective cover 3, the protective cover 3 comprises a cover shell 301, a back plate 302, a shunt hole plate 303, a baffle I 304, and a baffle II 305, and the outer side of the cover shell 301 is provided with the argon gas inlet pipe 4.

[0040] The back plate 302 is fixedly connected to the shell, the back plate 302 is close to the welding surface when welding a pipeline, so that the leakage of argon gas from the side of the back plate 302 is reduced, the shunt hole plate 303 is arranged on the inner side of the cover shell 301, the baffle I 304 and the baffle II 305 are arranged on the front side of the cover shell 301, the baffle I 304 is connected to the left side of the cover shell 301, the baffle II 305 is connected to the right side of the cover shell 301, the end of the baffle I 304 and the end of the baffle II 305 form an observation port 306 on the front side of the protective cover 3, an operator can see the welding condition through the observation port 306 on the front side of the protective cover 3 to complete the welding operation, and the argon gas can also be dispersed at the welding position and then escape from the observation port 306, the porcelain nozzle 102 is arranged between the baffle I 304 and the baffle II 305, and the two baffles can reduce the escape of argon gas from the front side of the protective cover 3 as much as possible.

[0041] The use process of the small space argon arc welding gun with the weld surface protective cover is as follows:

[0042] In use, first adjust the position of the clamp 2 and the extension length of the tungsten needle 101, so that the tungsten needle 101 is not shielded by the shielding edge I 304 and the shielding edge II 305 during welding, then connect the argon pipeline to the argon inlet pipe 4, then place the argon arc welding gun close to the weld, then input argon, so that the argon is evenly dispersed from the shunt orifice plate 303 to the surface of the weld, and then the argon arc welding gun can be used for welding.

[0043] Embodiment 2

[0044] A small space argon arc welding gun with a weld surface protection cover, comprising an argon arc welding gun body 1, a clamp 2, a protection cover 3 and an argon inlet pipe 4, the argon arc welding gun body 1 comprises a tungsten needle 101, a porcelain nozzle 102, a hand-held handle 103 and a tail cap 104, the length of the argon arc welding gun body 1 from the front end of the porcelain nozzle 102 to the rear end of the tail cap 104 is within the range of 50mm, the length of the hand-held handle 103 is 1750mm, and the outer side of the cover shell 301 is provided with the argon inlet pipe 4.

[0045] The clamp 2 is connected to the porcelain nozzle 102, and the protection cover 3 is further connected to the clamp 2, and a wave-shaped connecting piece 202 is arranged at the connecting position of the clamp 2 and the protection cover 3, so as to adjust the angle between the protection cover 3 and the argon arc welding gun, the wave-shaped connecting piece 202 is made of metal, and the protection cover 3 comprises a cover shell 301, a rear side plate 302, a shunt orifice plate 303, a shielding edge I 304 and a shielding edge II 305.

[0046] The rear side plate 302 is fixedly connected to the rear side of the shell, the rear side plate 302 is provided with a pipeline groove 3021, the rear side plate 302 is tightly attached to the pipeline during welding, the inner side of the cover shell 301 is provided with the shunt orifice plate 303, the shunt orifice plate 303 and the cover shell 301 are filled with a metal wire filling layer 307, the front side of the cover shell 301 is provided with the shielding edge I 304 and the shielding edge II 305, the shielding edge I 304 is connected to the left side of the cover shell 301, the shielding edge II 305 is connected to the right side of the cover shell 301, the ends of the shielding edge I 304 and the shielding edge II 305 form an observation port 306 at the front side of the protection cover 3, an operator can see the welding condition through the observation port 306 at the front side of the protection cover 3, so as to complete the welding operation, and the argon can be dispersed at the welding position and then escape from the observation port 306, the porcelain nozzle 102 is arranged between the shielding edge I 304 and the shielding edge II 305, the ends of the shielding edge I 304 and the shielding edge II 305 are inwardly bent, the two bent shielding edges can have a gathering effect on the argon, so that the argon escaping from the front side of the protection cover 3 can be reduced as much as possible.

[0047] The use process of the small space argon arc welding gun with the weld surface protection cover is as follows:

[0048] In use, first adjust the position of the clamp 2 and the length of the tungsten needle 101, so that the tungsten needle 101 is not blocked by the blocking edge I 304 and the blocking edge II 305, then adjust the wave-shaped connecting piece 202 to change the angle between the protective cover 3 and the head of the argon arc welding gun, so that the protective cover 3 is as close to the weld as possible, the pipeline groove 3021 is as close to the pipeline as possible, and the leakage of argon gas from the gap is reduced, then link the argon gas pipeline to the argon gas inlet pipe 4, then place the argon arc welding gun close to the weld, then introduce argon gas, so that the argon gas first passes through the metal wire filler layer 307 between the cover shell 301 and the shunt orifice plate 303, so that the argon gas is more evenly dispersed, then evenly dispersed from the shunt orifice plate 303 to the weld surface, and the operator can see the welding condition through the observation port 306 to complete the welding operation.

[0049] Example 3

[0050] A small space argon arc welding gun with a weld surface protective cover, comprising an argon arc welding gun body 1, a clamp 2, a protective cover 3 and an argon gas inlet pipe 4, the argon arc welding gun body 1 comprises a tungsten needle 101, a porcelain nozzle 102, a hand-held handle 103 and a tail cap 104, the length of the argon arc welding gun body 1 from the front end of the porcelain nozzle 102 to the rear end of the tail cap 104 is 40mm, the length of the hand-held handle 103 is 1500mm, and the outer side of the cover shell 301 is provided with the argon gas inlet pipe 4.

[0051] The clamp 2 is connected to the porcelain nozzle 102, and the clamp 2 is further connected with the protective cover 3, and the connection between the clamp 2 and the protective cover 3 is provided with a wave-shaped connecting piece 202 for adjusting the angle between the protective cover 3 and the argon arc welding gun, and the wave-shaped connecting piece 202 is made of metal material, and the protective cover 3 comprises a cover shell 301, a rear side plate 302, a shunt orifice plate 303, a blocking edge I 304 and a blocking edge II 305.

[0052] The rear side plate 302 is fixedly connected to the rear side of the shell, and is used for abutting against the pipeline during welding of the pipeline, the inner side of the cover shell 301 is provided with the shunt orifice plate 303, the shunt orifice plate 303 and the cover shell 301 are filled with a metal wire filler layer 307, the front side of the cover shell 301 is provided with the blocking edge I 304 and the blocking edge II 305, the blocking edge I 304 is connected to the left side of the cover shell 301, the blocking edge II 305 is connected to the right side of the cover shell 301, the ends of the blocking edge I 304 and the blocking edge II 305 form an observation port 306 at the front side of the protective cover 3, the operator can see the welding condition through the observation port 306 at the front side of the protective cover 3 to complete the welding operation, and the argon gas can be dispersed at the welding position and then escape from the observation port 306, the porcelain nozzle 102 is arranged between the blocking edge I 304 and the blocking edge II 305, the ends of the blocking edge I 304 and the blocking edge II 305 are inwardly bent, the two bent blocking edges can have a gathering effect on the argon gas, and the leakage of the argon gas from the front side of the protective cover 3 can be reduced as much as possible.

[0053] The upper edges of the stop edge I 304 and the stop edge II 305 are convex upward, so that the upper edges of the stop edge I 304 and the stop edge II 305 are higher than the lower edge of the porcelain nozzle 102, and the heightening of the upper edges of the stop edges can prevent the argon gas from escaping from the gap between the stop edges and the porcelain head.

[0054] The use process of the small-space argon arc welding gun with the welding seam surface protection cover is as follows:

[0055] In use, first, the position of the hoop 2 and the extension length of the tungsten needle 101 are adjusted, so that the tungsten needle 101 is not shielded by the stop edge I 304 and the stop edge II 305, then the wave-shaped connecting piece 202 is adjusted to change the angle between the protection cover 3 and the argon arc welding gun head, so that the protection cover 3 is as close to the welding seam as possible, the leakage of argon gas from the gap is reduced, then the argon gas pipeline is connected to the argon gas inlet pipe 4, then the argon arc welding gun is close to the welding seam, then the argon gas is introduced, so that the argon gas first passes through the metal wire filler layer 307 between the cover shell 301 and the shunt orifice plate 303, so that the argon gas is more evenly dispersed, then is evenly dispersed from the shunt orifice plate 303 to the welding seam surface, and the operator can see the welding condition through the observation opening 306 to complete the welding operation.

[0056] Example 4

[0057] A small-space argon arc welding gun with a welding seam surface protection cover, comprising an argon arc welding gun body 1, a hoop 2, a protection cover 3 and an argon gas inlet pipe 4, the argon arc welding gun body 1 comprises a tungsten needle 101, a porcelain nozzle 102, a hand-held handle 103 and a tail cap 104, the length of the argon arc welding gun body 1 from the front end of the porcelain nozzle 102 to the rear end of the tail cap 104 is 40mm, the length of the hand-held handle 103 is 2000mm, and the outer side of the cover shell 301 is provided with the argon gas inlet pipe 4.

[0058] The hoop 2 is connected to the porcelain nozzle 102, and the hoop 2 is further connected with the protection cover 3, and the connection part of the hoop 2 and the protection cover 3 is provided with a wave-shaped connecting piece 202 for adjusting the angle between the protection cover 3 and the argon arc welding gun, the wave-shaped connecting piece 202 is made of metal material, and the protection cover 3 comprises a cover shell 301, a rear side plate 302, a shunt orifice plate 303, a stop edge I 304 and a stop edge II 305.

[0059] The rear side of the shell is fixedly connected with a rear side plate 302, which is used for abutting against the pipeline during welding of the pipeline, the inner side of the upper shell 301 is provided with a shunt orifice plate 303, the shunt orifice plate 303 and the upper shell 301 are filled with a wire filling layer 307, the front side of the upper shell 301 is provided with a baffle edge I 304 and a baffle edge II 305, the baffle edge I 304 is connected to the left side of the upper shell 301, the baffle edge II 305 is connected to the right side of the upper shell 301, the length of the baffle edge I 304 is relatively short, the length of the baffle edge II 305 is relatively long, and the end of the baffle edge II 305 is bent towards the end of the baffle edge I 304, so as to form an enclosure for the right side and the front side of the porcelain nozzle 102, the end of the baffle edge I 304 and the end of the baffle edge II 305 form an observation port 306 on the front side of the protective cover 3, so that the welding condition can be observed through the observation port 306 on the front side of the protective cover 3, thereby completing the welding operation, and the argon can also be dispersed at the welding position and then escape from the observation port 306, the porcelain nozzle 102 is arranged between the baffle edge I 304 and the baffle edge II 305, and the ends of the baffle edge I 304 and the baffle edge II 305 are inwardly bent, so that the two bent baffle edges can have a gathering effect on the argon, and the escape of the argon from the front side of the protective cover 3 can be reduced as much as possible.

[0060] The upper edges of the baffle edge I 304 and the baffle edge II 305 are protruded upwards, so that the upper edges of the baffle edge I 304 and the baffle edge II 305 are higher than the lower edge of the porcelain nozzle 102, and the heightened upper edges of the baffle edges can prevent the argon from escaping from the gap between the baffle edges and the porcelain nozzle.

[0061] The use process of the small-space argon arc welding gun with the welding seam surface protective cover is as follows:

[0062] During use, the position of the clamp 2 and the extension length of the tungsten needle 101 are adjusted first, so that the tungsten needle 101 is not shielded by the baffle edge I 304 and the baffle edge II 305, then the wave-shaped connecting piece 202 is adjusted to change the angle between the protective cover 3 and the argon arc welding gun head, so that the protective cover 3 is as close to the welding seam as possible, the leakage of the argon from the gap is reduced, the argon pipeline is connected to the argon inlet pipe 4, then the argon arc welding gun is close to the welding seam, then the argon is introduced, so that the argon passes through the wire filling layer 307 between the upper shell 301 and the shunt orifice plate 303 first, the argon is more uniformly dispersed, then the argon is uniformly dispersed from the shunt orifice plate 303 to the welding seam surface, when the gap is too narrow or is limited due to the angle, the welding condition can be observed through the left observation port 306 by the operator, thereby completing the welding operation.

Claims

1. A small space argon arc welding gun with a weld bead surface protection shield, characterized in that, The argon arc welding gun body (1) includes a tungsten needle (101), a porcelain nozzle (102), a hand-held handle (103), and a tail cap (104), the clamping hoop (2) is connected to the porcelain nozzle (102), the clamping hoop (2) is further connected with the protective cover (3), the protective cover (3) includes a cover shell (301), a back plate (302), a shunt hole plate (303), a stop edge I (304), and a stop edge II (305), the back plate (302) is fixedly connected to the rear side of the cover shell (301), the shunt hole plate (303) is arranged on the inner side of the cover shell (301), the stop edge I (304) and the stop edge II (305) are arranged on the front side of the cover shell (301), the stop edge I (304) is connected to the left side of the cover shell (301), the stop edge II (305) is connected to the right side of the cover shell (301), the observation port (306) is formed between the end of the stop edge I (304) and the end of the stop edge II (305), and the argon inlet pipe (4) is arranged on the outer side of the cover shell (301).

2. A small space argon arc welding gun with a weld bead surface protector according to claim 1, characterized in that The connection part between the clamping hoop (2) and the protective cover (3) is provided with a wave-shaped connecting piece (202) for adjusting the angle between the protective cover (3) and the argon arc welding gun, and the wave-shaped connecting piece (202) is made of metal.

3. A small space argon arc welding gun with a weld bead surface protector according to claim 2, characterized in that The shunt hole plate (303) and the cover shell (301) are filled with a metal wire filling layer (307).

4. A small space argon arc welding gun with a weld bead surface protector according to claim 3, characterized in that The length of the argon arc welding gun body (1) from the front end of the porcelain nozzle (102) to the rear end of the tail cap (104) is in the range of 40mm-75mm.

5. A small space argon arc welder with a weld bead surface protector according to claim 1, characterized in that, The back plate (302) is provided with a pipeline groove (3021) for abutting the pipeline when welding.

6. A small space argon arc welding gun with a weld bead surface protection shield according to any one of claims 1 to 5, characterized in that The observation port (306) is arranged at the front end of the protective cover (3).

7. A small space argon arc welding gun with a weld seam surface protection shield according to any one of claims 1 to 5, characterized in that The observation port (306) is arranged on one side of the protective cover (3).

8. A small space argon arc welding gun with a weld seam surface protection shield according to claim 6 or 7, characterized in that The porcelain nozzle (102) is arranged between the stop edge I (304) and the stop edge II (305).

9. A small space argon arc welder with a weld bead surface protector according to claim 8, characterized in that, The upper edges of the stop edge I (304) and the stop edge II (305) are higher than the lower edge of the porcelain nozzle (102).

10. A small space argon arc welder with a weld bead surface protector according to claim 4, characterized in that, The length of the hand-held handle (103) is in the range of 20mm-2000mm.

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