Large-diameter pipeline circular seam argon arc welding back gas protection device

Abstract

A large-diameter pipeline circular seam argon arc welding back face gas protection device comprises a supporting base, a supporting guide rail, a second threaded hole and a second threaded rod, the supporting guide rail is installed in the middle of the top end of the supporting base, a transversely-arranged moving guide rail is arranged on the supporting guide rail, and the moving guide rail is connected with the supporting guide rail through a positioning sliding block; an argon protection cover is installed at one end of the moving guide rail and connected with an argon inlet pipe, two first threaded holes are symmetrically formed in one side of the positioning sliding block, first threaded rods are connected into the first threaded holes in a screwed mode, a transverse block is arranged on one side of the positioning sliding block, and a transverse hole is formed in the position, corresponding to the moving guide rail, of the transverse block. The argon arc welding back gas protection device is novel in structure and ingenious in conception, traditional argon arc welding back gas protection work is improved and innovated, argon consumption is greatly saved, gas protection quality is guaranteed, manufacturing cost is reduced, and requirements of circular seam argon arc welding work are met.

Description

Technical Field

[0001] The utility model relates to a protection device, in particular to a back gas protection device for argon arc welding of circumferential seams of large-diameter pipelines. Background Technique

[0002] Common current methods for back protection gas in argon arc welding of circumferential seams of small-diameter cylinders (Φ300 - 1200) or large-diameter pipelines (Φ300 and above): Seal both ends of the cylinder or pipeline to be welded, and fill the cylinder or pipeline with protective Ar 2 gas to displace the air inside, so that the Ar 2 gas fills the entire space, and then perform argon arc welding operation.

[0003] Existing defects:

[0004] In the current argon gas protection operation, the input Ar 2 has a relatively large cost, and a large amount of Ar is wasted 2 ; Since the space filled with Ar 2 is relatively large, it is easy to have an incomplete displacement problem when displacing air, the back protection is insufficient, welding defects are generated, resulting in rework. Content of the Utility Model

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a back gas protection device for argon arc welding of circumferential seams of large-diameter pipelines, effectively solving the problem that in the current argon gas protection operation, the input Ar 2 has a relatively large cost, and a large amount of Ar is wasted 2 ; Since the space filled with Ar 2 is relatively large, it is easy to have an incomplete displacement problem when displacing air, the back protection is insufficient, welding defects are generated, resulting in rework.

[0006] To achieve the above object, the utility model provides the following technical solutions: The utility model includes a support base, a support guide rail, a moving guide rail, a positioning slider, an argon gas protection cover, an argon gas inlet pipe, a vertical hole, a first threaded hole, a first threaded rod, a transverse block, a transverse hole, a second threaded hole and a second threaded rod. The middle of the top of the support base is provided with a support guide rail. A horizontally arranged moving guide rail is arranged on the support guide rail. The moving guide rail is connected to the support guide rail through a positioning slider. One end of the moving guide rail is provided with an argon gas protection cover. The argon gas protection cover is connected with an argon gas inlet pipe. Two first threaded holes are symmetrically opened on one side of the positioning slider. The first threaded holes are internally screwed with first threaded rods. A transverse block is arranged on one side of the positioning slider. A transverse hole is opened at the position corresponding to the moving guide rail on the transverse block. A second threaded hole communicating with the transverse hole is opened in the middle of the outside of the transverse block. The second threaded hole is internally screwed with a second threaded rod.

[0007] Preferably, the moving guide rail is an L-shaped rod.

[0008] Preferably, a vertical hole is provided at the position of the positioning slider corresponding to the support guide rail.

[0009] Preferably, the first threaded hole communicates with the vertical hole.

[0010] Preferably, handles are provided at one ends of the first threaded rod and the second threaded rod.

[0011] Preferably, the support guide rail has the same shape as the vertical hole, and the moving guide rail has the same shape as the transverse hole.

[0012] Beneficial effects: When the utility model is in use, the support base is fixed on one side of the workpiece to be welded. The first threaded rod in the first threaded hole of the positioning slider is loosened, and the position of the positioning slider on the support guide rail is adjusted so that the positioning slider is at a suitable height on the support guide rail. Then the first threaded rod is tightened. After tightening, the second threaded rod in the second threaded hole is loosened, and the position of the moving guide rail in the transverse hole is adjusted so that the argon gas protection cover at one end of the moving guide rail is located at the welding position. Then the second threaded rod is tightened. The argon gas protection cover is in flexible contact with the welding part. At this time, argon gas can be filled into the argon gas protection cover through the argon gas inlet pipe, and the argon gas protection cover can protect the welding part by filling argon gas, which is beneficial to use. The structure of the utility model is novel and ingenious. It improves and innovates the traditional back gas protection work of argon arc welding, greatly saves the consumption of argon gas, ensures the quality of gas protection, thereby reducing the manufacturing cost and meeting the requirements of circumferential seam argon arc welding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings are used to provide a further understanding of the utility model and constitute a part of the specification. They are used together with the embodiments of the utility model to explain the utility model and do not constitute a limitation to the utility model. In the drawings:

[0014] Figure 1 is the overall structural schematic diagram of the utility model;

[0015] Figure 2 is the structural schematic diagram of the positioning slider of the utility model;

[0016] Figure 3 is the cross-sectional view of the positioning slider of the utility model;

[0017] The reference numerals in the figures: 1, support base; 2, support guide rail; 3, moving guide rail; 4, positioning slider; 5, argon gas protection cover; 6, argon gas inlet pipe; 7, vertical hole; 8, first threaded hole; 9, first threaded rod; 10, transverse block; 11, transverse hole; 12, second threaded hole; 13, second threaded rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will further elaborate on the specific implementation manners of the present utility model in conjunction with the appended drawings. Figures 1-3 A further detailed description will be given to the specific implementation manners of the present utility model.

[0019] Embodiment 1 is given by Figures 1-3 The present utility model provides a back gas protection device for GTAW of large-diameter pipeline girth welds, including a support base 1, a support guide rail 2, a moving guide rail 3, a positioning slider 4, an argon gas protection cover 5, an argon gas inlet pipe 6, a vertical hole 7, a first threaded hole 8, a first threaded rod 9, a transverse block 10, a transverse hole 11, a second threaded hole 12, and a second threaded rod 13. The middle of the top end of the support base 1 is provided with the support guide rail 2. A horizontally arranged moving guide rail 3 is provided on the support guide rail 2. The moving guide rail 3 is connected to the support guide rail 2 through the positioning slider 4. One end of the moving guide rail 3 is installed with the argon gas protection cover 5. The argon gas protection cover 5 is connected with the argon gas inlet pipe 6. Two first threaded holes 8 are symmetrically opened on one side of the positioning slider 4. The first threaded rod 9 is screwed into the first threaded hole 8. A transverse block 10 is arranged on one side of the positioning slider 4. A transverse hole 11 is opened at the position corresponding to the moving guide rail 3 on the transverse block 10. A second threaded hole 12 communicating with the transverse hole 11 is opened in the middle of the outside of the transverse block 10. The second threaded rod 13 is screwed into the second threaded hole 12.

[0020] The moving guide rail 3 is an L-shaped rod, which is convenient for the installation and use of the moving guide rail 3.

[0021] A vertical hole 7 is opened at the position of the positioning slider 4 corresponding to the support guide rail 2, which is convenient for the fitting installation and use.

[0022] The first threaded hole 8 communicates with the vertical hole 7, which is convenient for the cooperation and use of the first threaded hole 8 and the vertical hole 7.

[0023] Handles are arranged at one ends of the first threaded rod 9 and the second threaded rod 13, which is convenient for the use of the first threaded rod 9 and the second threaded rod 13.

[0024] The support guide rail 2 has the same shape as the vertical hole 7, and the moving guide rail 3 has the same shape as the transverse hole 11, which is convenient for the fitting installation and use.

[0025] Working principle: When the present utility model is in use, the support base 1 is fixed on one side of the workpiece to be welded. The first threaded rod 9 in the first threaded hole 8 on the positioning slider 4 is loosened, and the position of the positioning slider 4 on the support guide rail 2 is adjusted so that the positioning slider 4 is at a suitable height on the support guide rail 2. Then the first threaded rod 9 is tightened. After tightening, the second threaded rod 13 in the second threaded hole 12 is loosened, and the position of the moving guide rail 3 in the transverse hole 11 is adjusted so that the argon gas protection cover 5 at one end of the moving guide rail 3 is located at the welding position. Then the second threaded rod 13 is tightened. The argon gas protection cover 5 is in flexible contact with the welding position. At this time, argon gas can be filled into the argon gas protection cover 5 through the argon gas inlet pipe 6, and the argon gas protection cover 5 can protect the welding position by filling argon gas, which is beneficial for use.

[0026] Beneficial effects: The structure of the utility model is novel and ingeniously conceived. It improves and innovates the traditional back gas protection work of argon arc welding, greatly saving the consumption of argon gas, ensuring the quality of gas protection, thereby reducing the manufacturing cost and meeting the requirements of circumferential seam argon arc welding operations.

[0027] Through those skilled in the art, all the electrical components in this case are connected to their adapted power supplies through wires, and appropriate controllers and encoders should be selected according to the actual situation to meet the control requirements. For the specific connection and control sequence, reference should be made to the sequence of the electrical components working successively in the following working principle to complete the electrical connection. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process, and no further description of electrical control will be given.

[0028] Finally, it should be noted that the above are only the preferred embodiments of the utility model and are not used to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the utility model shall be included within the protection scope of the utility model.

Claims

1. A back gas protection device for argon arc welding of a large diameter pipeline annular seam, comprising a support base (1), a support guide rail (2), a movable guide rail (3), a positioning slide block (4), an argon gas protection cover (5), an argon gas inlet pipe (6), a vertical hole (7), a first threaded hole (8), a first threaded rod (9), a transverse block (10), a transverse hole (11), a second threaded hole (12) and a second threaded rod (13), characterized in that: A support rail (2) is installed in the middle of the top of the support base (1), a movable rail (3) is arranged on the support rail (2), the movable rail (3) is connected to the support rail (2) through a positioning slider (4), an argon protective cover (5) is installed at one end of the movable rail (3), an argon gas inlet pipe (6) is connected to the argon gas protective cover (5), two first threaded holes (8) are symmetrically provided on one side of the positioning slider (4), a first threaded rod (9) is screwed into the first threaded hole (8), a transverse block (10) is provided on one side of the positioning slider (4), a transverse hole (11) is provided on the transverse block (10) at a position corresponding to the movable rail (3), a second threaded hole (12) connected to the transverse hole (11) is provided in the middle of the outer side of the transverse block (10), and a second threaded rod (13) is screwed into the second threaded hole (12).

2. The back gas protection device for argon arc welding of large diameter pipeline annular seam according to claim 1 is characterized in that: The movable guide rail (3) is an L-shaped rod.

3. The back gas protection device for argon arc welding of large diameter pipeline annular seam according to claim 1 is characterized in that: The positioning slide block (4) is provided with a vertical hole (7) at a position corresponding to the supporting guide rail (2).

4. The back gas protection device for argon arc welding of large diameter pipeline annular seam according to claim 3 is characterized by: The first threaded hole (8) is communicated with the vertical hole (7).

5. The back gas protection device for argon arc welding of large diameter pipeline annular seam according to claim 1 is characterized in that: One end of each of the first threaded rod (9) and the second threaded rod (13) is provided with a handle.

6. The back side gas protection device for argon arc welding of large diameter pipeline annular seam according to claim 1 is characterized by: The supporting guide rail (2) and the vertical hole (7) have the same shape, and the moving guide rail (3) and the transverse hole (11) have the same shape.

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