Argon arc welding device for pipe connection

Abstract

The utility model discloses an argon arc welding device for pipe connection, which comprises a base, the welding device comprises a welding support, a welding gun assembly arranged on one side of the welding support, a single-head air outlet device and a double-head air outlet device, and rotating clamping mechanisms are arranged at two ends of a protective cover. A steel pipe to be connected and welded is clamped through the rotary clamping mechanism, the connection position is coaxially aligned in the protective cover, the double-end gas outlet device is aligned with the interior of the steel pipe, protective gas is injected, molten liquid metal at the position of a weld joint on the inner surface of the steel pipe is protected, and the welding effect is improved; the protective cover is filled with protective gas through the single-head gas outlet device, molten metal at the weld joint of the outer surface of the steel pipe is protected, welding is conducted through the welding gun assembly, it is ensured that the outer surface and the inner surface of the weld joint of the pipe are protected by argon in the pipe welding process, liquid metal is prevented from being oxidized and burnt during welding, and the welding quality is improved. And the welding seam quality and the welded steel pipe strength are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe welding, in particular to an argon arc welding device used for pipe connection. Background Art

[0002] As a connection technology, welding usually has certain assembly requirements for the workpiece to be welded. Positioning and fixing of weldments are necessary parts of welding operation. During welding, welding fixtures are usually required to clamp and position the workpiece to be welded, thereby solving the assembly problem of the workpiece to be welded. Among them, pipe-to-pipe connection is a common structural form in welding.

[0003] Argon arc welding is the main welding method for thin-walled steel pipes, alloy metal pipes and non-ferrous metal pipes. It has the advantages of low cost, high welding strength and less weld metal oxidation. It can be applied to a variety of metals that are difficult to weld with ordinary arc welding. The argon flow flowing out of the welding gun nozzle during argon arc welding will prevent the high-temperature molten metal in the weld pool from being oxidized by oxygen in the air; because the weld must be fully melted during the welding process, there is also high-temperature molten liquid metal on the back side of the weld; the argon protection of the liquid metal on the back side is as important as the molten metal in the front weld pool. If the molten metal in the back weld pool loses the argon protection, some alloy elements in the welding base material will be burned, and the reduction in the alloy element content in the weld will cause the corrosion resistance of the weld to decrease, resulting in early rust of the pipe.

[0004] When two straight pipes of the same model are connected and welded, the outer surface of the pipe is protected by argon gas, but the inner wall of the pipe cannot be protected by argon gas, which will affect the welding effect of the pipe connection and reduce the strength of the pipe. Utility Model Content

[0005] In view of the technical defects existing in the background technology, the utility model proposes an argon arc welding device for pipe connection, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows:

[0006] An argon arc welding device for pipe connection, comprising a base, a welding device is arranged on one side of the base, the welding device comprises a welding bracket, a welding gun assembly arranged on one side of the welding bracket, a single-end gas outlet device arranged on the other side of the welding bracket, and a double-end gas outlet device arranged near the bottom end of the welding bracket, the base is provided with a protective cover below the welding gun assembly, and the output end of the welding gun assembly, the output end of the single-end gas outlet device, and the output end of the double-end gas outlet device all extend into the protective cover;

[0007] Both ends of the protective cover are provided with a rotating clamping mechanism, which includes a clamping base and a first clamping assembly and a second clamping assembly arranged at the ends of the clamping base in the length direction. The base is provided with a linear drive device connected to the first clamping assembly and the second clamping assembly.

[0008] As an improvement of the above solution, the outer surface of the protective cover is respectively provided with a first through hole, a second through hole and a third through hole corresponding to the output end of the welding gun assembly, the output end of the single-end gas outlet device and the output end of the double-end gas outlet device.

[0009] As an improvement of the above solution, the welding gun assembly includes a first fixing seat fixed on the welding bracket and a first connecting rod passing through the first fixing seat, and the first connecting rod is movably connected to the first fixing seat along the axial direction.

[0010] As an improvement of the above scheme, the single-head air outlet device includes a second fixed seat, a second connecting rod inserted in the second fixed seat, and a single-head air outlet head arranged at the end of the second connecting rod, and the second connecting rod is axially movably connected to the second fixed seat.

[0011] As an improvement of the above scheme, the double-ended air outlet device includes a third fixed seat, a third connecting rod inserted in the third fixed seat and a double-ended air outlet head arranged at the end of the third connecting rod, and the third connecting rod is axially movably connected to the third fixed seat.

[0012] As an improvement of the above scheme, the welding bracket is provided with a linear track at the position corresponding to the double-head air outlet device, and a linear driving cylinder is provided at one end of the linear track. The output end of the linear driving cylinder is connected to the rear end of the third fixed seat, and the third fixed seat is movably connected to the linear track.

[0013] As an improvement of the above solution, the linear drive device includes a sliding track arranged along the width direction of the base, a guide rod arranged along the length direction of the sliding track, and a first sliding seat and a second sliding seat sleeved on the guide rod.

[0014] As an improvement to the above solution, the guide rod has a first thread at one end corresponding to the first sliding seat position, and a second thread at one end corresponding to the second sliding seat position, and the first thread and the second thread are in opposite directions.

[0015] As an improvement of the above scheme, the first clamping assembly includes a first clamping bracket and a first arc-shaped clamping plate connected to the end of the first clamping bracket, and a plurality of first rubber wheels are arranged at equal intervals along the length direction of the first arc-shaped clamping plate. The second clamping assembly includes a second clamping bracket and a second arc-shaped clamping plate connected to the end of the second clamping bracket, and a plurality of second rubber wheels are arranged at equal intervals along the length direction of the second arc-shaped clamping plate.

[0016] As an improvement of the above solution, a third rubber wheel and a fourth rubber wheel are provided on the end surface of the clamping base, and the third rubber wheel and the fourth rubber wheel are respectively close to the two ends of the length direction of the clamping base.

[0017] The utility model has the beneficial effects that: the steel pipes to be connected and welded are clamped by a rotating clamping mechanism, and the connection is aligned coaxially in the protective cover, the steel pipe is sealed from the tail end by an air bag, the double-headed gas outlet device is aligned to the inside of the steel pipe to inject protective gas, so as to protect the molten liquid metal at the weld on the inner surface of the steel pipe and improve the welding effect; after the steel pipe is filled with protective gas, the connection of the steel pipe is aligned and fitted, and the protective cover is filled with protective gas through the single-headed gas outlet device to protect the molten metal at the weld on the outer surface of the steel pipe, and welding is performed through the welding gun assembly to ensure that the outer and inner surfaces of the pipe weld are protected by argon gas during the pipe welding process, so as to avoid oxidation and burning of the liquid metal during welding, and ensure the quality of the weld and the strength of the steel pipe after welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of the device of the utility model.

[0019] Figure 2 This is a schematic diagram of the welding gun bracket structure of the utility model.

[0020] Figure 3 It is a schematic diagram of the structure of a single-head gas outlet device and a welding gun assembly of the utility model.

[0021] Figure 4 It is a schematic structural diagram of the rotary clamping device of the utility model.

[0022] Figure 5 It is a schematic structural diagram of the linear drive device of the utility model.

[0023] Wherein: base 1, protective cover 11, welding bracket 2, linear track 21, linear drive cylinder 22, welding gun assembly 3, first fixed seat 31, first connecting rod 32, single-end air outlet device 4, second fixed seat 41, second connecting rod 42, single-end air outlet head 43, double-end air outlet device 5, third fixed seat 51, third connecting rod 52, double-end air outlet head 53, rotating clamping mechanism 6, clamping base 7, third rubber wheel 71, fourth rubber wheel 72, first clamping assembly 8, first clamping bracket 81, first arc-shaped clamping plate 82, first rubber wheel 83, second clamping assembly 9, second clamping bracket 91, second arc-shaped clamping plate 92, second rubber wheel 93, linear drive device 10, sliding track 101, guide rod 102, first sliding seat 103, second sliding seat 104, first thread 105, second thread 106. DETAILED DESCRIPTION

[0024] The implementation methods of the present invention are described below in conjunction with the accompanying drawings and relevant embodiments. The implementation methods of the present invention are not limited to the following embodiments, and the present invention involves relevant necessary components in this technical field, which should be regarded as common knowledge in this technical field and can be known and mastered by technical personnel in this technical field.

[0025] like Figures 1 to 5 As shown, an argon arc welding device for pipe connection includes a base 1, a welding device is provided on one side of the base 1, and the welding device includes a welding bracket 2, a welding gun assembly 3 arranged on one side of the welding bracket 2, a single-end gas outlet device 4 arranged on the other side of the welding bracket 2, and a double-end gas outlet device 5 arranged near the bottom end of the welding bracket 2, and a protective cover 11 is provided below the base 1 corresponding to the welding gun assembly 3, and the output end of the welding gun assembly 3, the output end of the single-end gas outlet device 4, and the output end of the double-end gas outlet device 5 all extend into the protective cover 11;

[0026] like Figure 2 and Figure 3 As shown, in the structure of the utility model, the welding bracket 2 is arranged on one side of the base 1, the end of the welding bracket 2 extends to the top of the protective cover 11, and a welding device is provided at the end of the welding bracket 2, the welding device includes a welding gun assembly 3 for welding, a single-head gas outlet device 4 and a double-head gas outlet device 5 for releasing protective gas, the output end of the welding gun assembly 3 is provided with a welding gun head, which passes through the top end of the protective cover 11 and extends into the protective cover 11, the output end of the single-head gas outlet device 4 passes through the outer surface of the protective cover 11 and extends to align with the output end of the welding gun assembly 3 on the weld of the steel pipe to be welded, when welding is performed on the unsealed part of the steel pipe, the protective gas is output through the single-head gas outlet device 4, so that the liquid metal is prevented from being oxidized and burned during welding, and the loss of protective gas is reduced through the protective cover, thereby improving the welding effect of the steel pipe;

[0027] like Figure 2 As shown, it should be noted that a double-ended gas outlet device 5 extending toward the direction of the protective cover 11 is provided near the bottom end of the welding bracket 2, and the ends of the double-ended gas outlet device 5 are respectively oriented toward the two ends of the protective cover and aligned with the axis of the two steel pipes to be welded. Before the steel pipes to be welded are butt-jointed, the protective gas is injected into the steel pipe through the double-ended gas outlet device 5. Specifically, an airbag is inserted into the tail of the steel pipe toward the welding end of the steel pipe in advance, and the airbag is inflated at a position close to the welding end of the steel pipe so that the airbag bulges and blocks the inner wall of the steel pipe, so that the gas filled in the double-ended gas outlet device 5 will not leak from the tail of the steel pipe, thereby reducing gas consumption and protecting the liquid metal inside the steel pipe during welding, thereby improving the welding effect of the steel pipe;

[0028] Specifically, the welding bracket 2 is provided with a linear track 21 at the position corresponding to the double-headed air outlet device 5, and a linear driving cylinder 22 is provided at one end of the linear track 21. The output end of the linear driving cylinder 22 is connected to the rear end of the third fixed seat 51, and the third fixed seat 51 is movably connected to the linear track 21. When in use, the linear driving cylinder 22 is used to push the air outlet end of the double-headed air outlet device 5 to align with the inner cavity of the steel pipe. After the injection of the protective gas is completed, the linear driving cylinder 22 is reset to control the double-headed air outlet device 5 to retract, and the steel pipes to be welded are aligned and the welding is completed by the welding device.

[0029] like Figure 1 and Figure 4 As shown, in terms of structure, the utility model has a rotating clamping mechanism 6 at both ends of the protective cover 11, and the rotating clamping mechanism 6 includes a clamping base 7 and a first clamping component 8 and a second clamping component 9 arranged at the ends of the clamping base 7 in the length direction. The base 1 is provided with a linear drive device 10 connected to the first clamping component 8 and the second clamping component 9, and the linear drive device 10 drives the first clamping component 8 and the second clamping component 9 to move toward or away from each other, so as to achieve the purpose of controlling the first clamping component 8 and the second clamping component 9 to clamp or loosen the pipe.

[0030] Furthermore, in the above scheme, the outer surface of the protective cover 11 is provided with a first through hole, a second through hole and a third through hole corresponding to the output end of the welding gun assembly 3, the output end of the single-end gas outlet device 4 and the output end of the double-end gas outlet device 5 respectively.

[0031] It should be noted that the protective cover 11 is used to retain the escaped shielding gas during the pipe welding process to reduce the loss of shielding gas. The shape and size of the protective cover are customized according to different batches of pipes with different diameters to reduce the cost of shielding gas.

[0032] Furthermore, in the above scheme, the welding gun assembly 3 includes a first fixing seat 31 fixed on the welding bracket 2 and a first connecting rod 32 passing through the first fixing seat 31, and the first connecting rod 32 is movably connected to the first fixing seat 31 along the axial direction.

[0033] Furthermore, in the above scheme, the single-head air outlet device 4 includes a second fixed seat 41, a second connecting rod 42 inserted in the second fixed seat 41, and a single-head air outlet head 43 arranged at the end of the second connecting rod 42, and the second connecting rod 42 is axially movably connected to the second fixed seat 41.

[0034] Furthermore, in the above scheme, the double-ended air outlet device 5 includes a third fixed seat 51, a third connecting rod 52 inserted in the third fixed seat 51, and a double-ended air outlet head 53 arranged at the end of the third connecting rod 52, and the third connecting rod 52 is axially movably connected to the third fixed seat 51.

[0035] In terms of structure, the utility model comprises a linear drive device 10 that drives the first clamping assembly 8 and the second clamping assembly 9 to move toward or away from each other. The linear drive device 10 comprises a sliding rail 101 arranged along the width direction of the base 1, a guide rod 102 arranged along the length direction of the sliding rail 101, a first sliding seat 103 and a second sliding seat 104 sleeved on the guide rod, and a rotating handle is connected to one end of the guide rod 102. The first sliding seat 103 and the second sliding seat 104 are controlled to move toward or away from each other by rotating the handle clockwise or counterclockwise, thereby driving the first clamping assembly 8 and the second clamping assembly 9 to move toward or away from each other.

[0036] Furthermore, in the above solution, the guide rod 102 has a first thread 105 at one end corresponding to the first sliding seat 103 and a second thread 106 at one end corresponding to the second sliding seat 104, and the first thread 105 and the second thread 106 are in opposite directions.

[0037] Furthermore, in the above scheme, the first clamping assembly 8 includes a first clamping bracket 81 and a first arc-shaped clamping plate 82 connected to the end of the first clamping bracket 81, and a plurality of first rubber wheels 83 are evenly spaced along the length direction of the first arc-shaped clamping plate 82. The second clamping assembly 9 includes a second clamping bracket 91 and a second arc-shaped clamping plate 92 connected to the end of the second clamping bracket 91, and a plurality of second rubber wheels 93 are evenly spaced along the length direction of the second arc-shaped clamping plate 92.

[0038] Furthermore, in the above solution, the end surface of the clamping base 7 is provided with a third rubber wheel 71 and a fourth rubber wheel 72 , and the third rubber wheel 71 and the fourth rubber wheel 72 are respectively close to two ends of the clamping base 7 in the length direction.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A argon arc welding device for pipe connection, characterized in that: The invention comprises a base (1), wherein a welding device is provided on one side of the base (1), wherein the welding device comprises a welding bracket (2), a welding gun assembly (3) arranged on one side of the welding bracket (2), a single-end gas outlet device (4) arranged on the other side of the welding bracket (2), and a double-end gas outlet device (5) arranged near the bottom end of the welding bracket (2); a protective cover (11) is provided below the base (1) corresponding to the welding gun assembly (3); and the output end of the welding gun assembly (3), the output end of the single-end gas outlet device (4), and the output end of the double-end gas outlet device (5) all extend into the protective cover (11); Both ends of the protective cover (11) are provided with a rotating clamping mechanism (6), the rotating clamping mechanism (6) comprising a clamping base (7) and a first clamping assembly (8) and a second clamping assembly (9) arranged at the ends of the clamping base (7) in the length direction, and the base (1) is provided with a linear drive device (10) connected to the first clamping assembly (8) and the second clamping assembly (9).

2. The argon arc welding device for pipe connection according to claim 1, characterized in that: The outer surface of the protective cover (11) is provided with a first through hole, a second through hole and a third through hole respectively corresponding to the output end of the welding gun assembly (3), the output end of the single-end gas outlet device (4) and the output end of the double-end gas outlet device (5).

3. The argon arc welding device for pipe connection according to claim 1, characterized in that: The welding gun assembly (3) comprises a first fixing seat (31) fixed on the welding bracket (2) and a first connecting rod (32) passing through the first fixing seat (31), wherein the first connecting rod (32) is movably connected to the first fixing seat (31) along the axial direction.

4. The argon arc welding device for pipe connection according to claim 1, characterized in that: The single-end air outlet device (4) comprises a second fixed seat (41), a second connecting rod (42) inserted into the second fixed seat (41), and a single-end air outlet head (43) arranged at the end of the second connecting rod (42), wherein the second connecting rod (42) is movably connected to the second fixed seat (41) along the axial direction.

5. The argon arc welding device for pipe connection according to claim 1, characterized in that: The double-ended air outlet device (5) comprises a third fixed seat (51), a third connecting rod (52) inserted into the third fixed seat (51), and a double-ended air outlet head (53) arranged at the end of the third connecting rod (52); the third connecting rod (52) is movably connected to the third fixed seat (51) along the axial direction.

6. The argon arc welding device for pipe connection according to claim 5, characterized in that: The welding bracket (2) is provided with a linear track (21) at a position corresponding to the double-ended air outlet device (5); a linear drive cylinder (22) is provided at one end of the linear track (21); an output end of the linear drive cylinder (22) is connected to the rear end of the third fixing seat (51); and the third fixing seat (51) is movably connected to the linear track (21).

7. The argon arc welding device for pipe connection according to claim 1, characterized in that: The linear drive device (10) comprises a sliding track (101) arranged along the width direction of the base (1), a guide rod (102) arranged along the length direction of the sliding track (101), a first sliding seat (103) and a second sliding seat (104) sleeved on the guide rod.

8. The argon arc welding device for pipe connection according to claim 7, characterized in that: The guide rod (102) has a first thread (105) at one end corresponding to the position of the first sliding seat (103), and a second thread (106) at one end corresponding to the position of the second sliding seat (104), and the first thread (105) and the second thread (106) are in opposite directions.

9. The argon arc welding device for pipe connection according to claim 1, characterized in that: The first clamping assembly (8) comprises a first clamping bracket (81) and a first arc-shaped clamping plate (82) connected to the end of the first clamping bracket (81), and a plurality of first rubber wheels (83) are arranged at equal intervals along the length direction of the first arc-shaped clamping plate (82). The second clamping assembly (9) comprises a second clamping bracket (91) and a second arc-shaped clamping plate (92) connected to the end of the second clamping bracket (91), and a plurality of second rubber wheels (93) are arranged at equal intervals along the length direction of the second arc-shaped clamping plate (92).

10. The argon arc welding device for pipe connection according to claim 1, characterized in that: The end surface of the clamping base (7) (1) is provided with a third rubber wheel (71) and a fourth rubber wheel (72), and the third rubber wheel (71) and the fourth rubber wheel (72) are respectively close to two ends of the clamping base (7) (1) in the length direction.

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