Walking type back welding gas protection device

Abstract

The utility model provides a walking type back welding gas protection device. The walking type back welding gas protection device comprises an external walking block, an internal walking block, an adsorption assembly and a gas protection cover. According to the walking type back welding gas protection device, when a pipeline is welded, the internal walking block can be placed on the inner wall of the pipeline, and the external walking block can be placed on the outer wall of the corresponding pipeline. And the external walking block and the internal walking block can be respectively adsorbed on the inner wall and the outer wall of the pipeline through the adsorption assembly. Therefore, an operator can push the external walking block to adjust the position of the internal walking block, the gas protection cover can be adjusted to a to-be-welded weld joint, and protection gas is conveyed through the gas protection cover to achieve protection of the welding back face. The device is simple in structure and easy to operate, the gas protection cover can be freely moved according to the welding position, local welding seam gas protection can be achieved, and protection gas is saved.

Description

Technical Field

[0001] This utility model belongs to the technical field of welding protection equipment, specifically relating to a walking back welding gas protection device. Background Technology

[0002] In the construction of petrochemical, coal chemical, and fine chemical projects, the welding process generally adopted is single-sided welding with double-sided forming. The back of the weld is usually protected by ceramic gaskets, inert gas protection for the entire pipeline, or welding with flux-coated welding wire. When welding the entire pipeline with gas, it is easy to cause serious gas waste, requiring a large amount of auxiliary welding gas. Moreover, the operation is relatively complicated and inconvenient for on-site welding. Utility Model Content

[0003] This utility model provides a mobile back-mounted welding gas protection device, which aims to solve the problems of inconvenient operation and serious gas waste when filling the welding space with protective gas during pipeline welding in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a walking back-welding gas protection device, comprising:

[0005] An external traveling block, wherein the external traveling block is provided with a plurality of first universal wheels for rolling on the outer side wall of the pipe;

[0006] An internal traveling block, wherein the internal traveling block is provided with a plurality of second universal wheels for rolling on the inner wall of the pipe;

[0007] An adsorption component is disposed between the outer walking block and the inner walking block, and is used to apply a relatively close force to the outer walking block and the inner walking block;

[0008] A gas shield, installed on the internal traveling block, is used to deliver protective gas to the weld seams on the inner wall of the pipe.

[0009] In one possible implementation, the adsorption component includes:

[0010] A first magnet is installed on one side of the external walking block, and the external walking block is provided with a mounting groove for installing the first magnet.

[0011] The second magnet is installed on one side of the internal traveling block, and the internal traveling block has a recessed mounting groove for installing the second magnet.

[0012] In one possible implementation, the outer walking block has support legs extending outward on both sides, and each support leg has a column protruding towards the first magnet, with the first omnidirectional wheel mounted on the column.

[0013] In one possible implementation, the gas protective cover includes a plurality of gas boxes connected in sequence, each gas box having an opening on one side for releasing protective gas, two adjacent gas boxes being hinged to each other, and a fixing component being provided between two adjacent gas boxes.

[0014] In one possible implementation, the gas box includes a first connection end and a second connection end, wherein the first connection end on one of two adjacent gas boxes is inserted into the second connection end on the other gas box.

[0015] In one possible implementation, the fixing component includes:

[0016] A fixing rod is provided through the side wall of the second connecting end and is threadedly connected to the first connecting end, for pressing the side wall of the second connecting end against the first connecting end.

[0017] In one possible implementation, the internal traveling block and the gas protective cover are spaced apart along the axial direction of the pipeline during use, and a connecting rod connects the internal traveling block and the gas protective cover.

[0018] In one possible implementation, one end of the connecting rod is fixedly mounted on the internal traveling block, and two mounting plates for mounting the connecting rod are fixedly mounted on the gas protective cover. The connecting rod is threaded with two fasteners for abutting against opposite sides of the two mounting plates.

[0019] In one possible implementation, an air inlet pipe is fixedly installed on the side wall of the gas box, and a gas diffuser pipe communicating with the air inlet pipe is installed inside the gas box, with multiple gas diffuser holes provided on the gas diffuser pipe.

[0020] The solution shown in this application, compared with the prior art, incorporates an outer and an inner traveling block. A gas protective cover is installed on the inner traveling block, and an adsorption assembly is installed between the inner and outer traveling blocks. This adsorption assembly creates a force that brings the outer and inner traveling blocks closer together. During pipe welding, the inner traveling block is placed on the inner wall of the pipe, and the outer traveling block is placed on the corresponding outer wall. The adsorption assembly adsorbs the outer and inner traveling blocks onto the inner and outer walls of the pipe, respectively. The operator can then move the outer traveling block to adjust the position of the inner traveling block, thereby adjusting the gas protective cover to the weld seam to be welded. The protective gas is delivered through the gas protective cover to protect the back side of the weld. The operation is simple; the position of the gas protective cover can be freely moved according to the welding location, achieving localized weld gas protection and conserving protective gas. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the internal walking block provided in an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the external walking block provided in an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of the gas box provided in an embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. External traveling block; 11. First caster wheel; 12. Column; 2. Internal traveling block; 21. Second caster wheel; 31. First magnet; 32. Second magnet; 4. Gas protection cover; 41. Gas box; 411. First connecting end; 412. Second connecting end; 42. Air inlet pipe; 43. Air outlet pipe; 5. Fixing rod; 6. Connecting rod; 7. Mounting plate; 8. Fixing component. Detailed Implementation

[0026] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] Please refer to the following: Figures 1 to 3 The present invention provides a walking-type back welding gas protection device. The walking-type back welding gas protection device includes an outer walking block 1, an inner walking block 2, an adsorption component, and a gas protection hood 4. The outer walking block 1 is equipped with multiple first universal wheels 11 for rolling on the outer wall of the pipe; the inner walking block 2 is equipped with multiple second universal wheels 21 for rolling on the inner wall of the pipe; the adsorption component is disposed between the outer walking block 1 and the inner walking block 2, for applying a relatively close force to the outer walking block 1 and the inner walking block 2; the gas protection hood 4 is installed on the inner walking block 2, for delivering protective gas to the weld seam on the inner wall of the pipe.

[0028] The mobile back-welding gas protection device provided in this embodiment, compared with the prior art, features an outer mobile block 1 and an inner mobile block 2. A gas protection cover 4 is installed on the inner mobile block 2, and an adsorption component is installed between the inner mobile block 2 and the outer mobile block 1. The adsorption component creates a mutual force between the outer mobile block 1 and the inner mobile block 2. During pipe welding, the inner mobile block 2 can be placed on the inner wall of the pipe, and the outer mobile block 1 can be placed on the corresponding outer wall of the pipe. The adsorption component can adsorb the outer mobile block 1 and the inner mobile block 2 onto the inner and outer walls of the pipe, respectively. The operator can then move the outer mobile block 1 to adjust the position of the inner mobile block 2, thereby adjusting the gas protection cover 4 to the weld seam to be welded. The gas protection cover 4 delivers protective gas to protect the back of the weld. Operation is simple; the position of the gas protection cover 4 can be freely moved according to the welding location, achieving localized weld gas protection and conserving protective gas.

[0029] Specifically, in this embodiment, when the outer traveling block 1 is installed on the outer wall of the pipe, the outer traveling wheel is rolled on the outer wall of the pipe. When the inner traveling block 2 is installed on the inner wall of the pipe, the inner traveling wheel is rolled on the inner wall of the pipe. This reduces the resistance of the outer traveling block 1 and the inner traveling block 2 as they move on the outer or inner wall of the pipe.

[0030] In some embodiments, the adsorption component described above may employ, for example... Figure 1 , Figure 2 The structure shown. See also... Figure 1 , Figure 2 The adsorption assembly includes a first magnet 31 and a second magnet 32. The first magnet 31 is mounted on one side of the outer traveling block 1, and the outer traveling block 1 has a recessed mounting groove for mounting the first magnet 31. The second magnet 32 ​​is mounted on one side of the inner traveling block 2, and the inner traveling block 2 also has a recessed mounting groove for mounting the second magnet 32. Two first magnets 31 are fixedly mounted on one side of the outer traveling block 1, located in the middle of the outer traveling block 1, with multiple first casters 11 located outside the first magnets 31. Two second magnets 32 are correspondingly mounted on the inner traveling block 2, with multiple second casters 21 located outside the second magnets 32. Through the arrangement of the first magnets 31 and the second magnets 32, the outer traveling block 1 and the inner traveling block 2 can be adsorbed towards each other, thus allowing the inner traveling block 2 to move relative to the outer traveling block 1 when it moves.

[0031] Preferably, in this embodiment, during the welding of the iron pipe, the inner traveling block 2 can be individually adsorbed onto the inner wall of the pipe, and the corresponding outer traveling block 1 can be adsorbed onto the outer wall of the pipe, which facilitates the installation of the inner traveling block 2 and the outer traveling block 1.

[0032] In some embodiments, the external walking block 1 described above can be as follows: Figure 2 The structure shown. See also Figure 2 The outer traveling block 1 has support legs extending outwards on both sides. A column 12 protrudes from each support leg towards the first magnet 31, and a first omnidirectional wheel 11 is mounted on the column 12. Two support legs extend outwards from each of the two opposite sides of the outer traveling block 1. A column 12 protrudes from the end of each support leg furthest from the outer traveling block 1, and a first omnidirectional wheel 11 is mounted at the end of the column 12. This allows the outward-facing wheels to abut against the outer wall of the pipe being tested, ensuring the stability of the outer traveling block 1 as it moves outside the pipe.

[0033] Preferably, in this embodiment, the caster wheel is a sphere that is rolled on the end of the column 12.

[0034] Specifically, in this embodiment, columns 12 with the same structure are installed on two opposite sides of the internal walking block 2, and second universal wheels 21 are installed on the columns 12. The second universal wheels 21 are spheres that are rolled on the ends of the columns 12.

[0035] In some embodiments, the gas shield 4 described above may employ, for example... Figure 1 , Figure 3 The structure shown. See also... Figure 1 , Figure 3 The gas protective cover 4 includes multiple gas boxes 41 connected in sequence. Each gas box 41 has an opening on one side for releasing protective gas. Adjacent gas boxes 41 are hinged together and a fixing component is provided between them. The gas protective cover 4 is composed of multiple gas boxes 41 connected end-to-end, with adjacent gas boxes 41 hinged together by a single connecting shaft. An opening for releasing protective gas is provided on the side away from the hinge shaft. Therefore, during use, the gas protective cover 4 can be bent into an arc shape to fit the inner wall of the pipe, allowing the openings of the multiple gas boxes 41 to be located at the weld seam to be welded, effectively filling the weld seam with protective gas and providing protection.

[0036] In some embodiments, the gas cartridge 41 described above can be as follows: Figure 1 , Figure 3 The structure shown. See also... Figure 1 , Figure 3The gas box 41 includes a first connecting end 411 and a second connecting end 412. The first connecting end 411 of one gas box 41 is inserted into the second connecting end 412 of the other gas box 41. The distance between two spaced-apart baffles on the first connecting end 411 is smaller than the distance between two spaced-apart baffles on the second connecting end 412. When two adjacent gas boxes 41 are connected together, the outer wall of the first connecting end 411 slides onto the inner wall of the second connecting end 412. A partition is fixedly installed between the two baffles of the first connecting end 41, thereby dividing the multiple gas boxes 41 into multiple gas chambers and improving the utilization rate of the protective gas.

[0037] Preferably, in this embodiment, a clearance is provided on the second connecting end 412 to allow the first connecting end 411 to rotate.

[0038] In some embodiments, the aforementioned fixing component may employ, for example... Figure 3 The structure shown. See also Figure 3 The fixing component includes a fixing rod 5. The fixing rod 5 is installed through the side wall of the second connecting end 412 and is threadedly connected to the first connecting end 411, used to press the side wall of the second connecting end 412 against the first connecting end 411. The fixing rod 5 is bolted, and the baffle of the first connecting end 411 is provided with a threaded hole for threaded connection with the fixing rod 5. The baffle of the second connecting end 412 is provided with a fixing hole for avoiding the fixing rod 5. After adjusting the angle of the two adjacent gas boxes 41, the first connecting end 411 and the second connecting end 412 on the two adjacent gas boxes 41 can be fixed together by tightening the fixing rod 5. The structure is simple and the operation is convenient.

[0039] In some embodiments, the aforementioned internal walking block 2 may adopt the following... Figure 1 See the structure shown. Figure 1 The internal traveling block 2 and the gas protective cover 4 are spaced apart along the axis of the pipeline during use, and a connecting rod 6 connects them. The internal traveling block 2 and the gas protective cover 4 are connected by the connecting rod 6, thus ensuring that they are spaced apart along the axis of the pipeline to be welded. When the gas protective cover 4 is located at the weld seam, the internal traveling block 2 is located on one side of the weld seam, thereby placing the corresponding external traveling block 1 on one side of the weld seam, avoiding interference with the welding torch operation. Sufficient operating space is provided for the operator, facilitating welding operations.

[0040] In some embodiments, the connecting rod 6 described above can be as follows: Figure 1 The structure shown. See also Figure 1One end of the connecting rod 6 is fixedly mounted on the internal traveling block 2. Two mounting plates 7 for mounting the connecting rod 6 are fixedly mounted on the gas protective cover 4, and two fixing pieces 8 are threadedly connected to the connecting rod 6, respectively abutting against the opposite sides of the two mounting plates 7. Two mounting plates 7 are fixedly mounted in the middle of the gas protective cover 4, and the two mounting plates 7 are spaced parallel to each other along the length of the connecting rod 6. The fixing pieces 8 are nuts threadedly connected to the connecting rod 6, and the two fixing pieces 8 are located on the opposite sides of the two mounting plates 7. In use, the position of the connecting rod 6 on the gas protective cover 4 can be adjusted according to the length of the pipe. This allows adjustment of the distance between the internal traveling block 2 and the gas protective cover 4, making it suitable for welding pipes of different lengths.

[0041] In some embodiments, the gas cartridge 41 described above can be as follows: Figure 3 The structure shown. See also Figure 3 An inlet pipe 42 is fixedly installed on the side wall of the gas box 41. A diffuser pipe 43, communicating with the inlet pipe 42, is installed inside the gas box 41. The diffuser pipe 43 has multiple diffuser holes. The inlet pipe 42 is fixedly installed on the side of the gas box 41 furthest from the opening. The diffuser pipe 43, communicating with the inlet pipe 42, is fixedly installed inside the gas box 41. The multiple diffuser holes allow for a more uniform distribution of the protective gas inside the gas box 41, effectively preventing external oxygen from entering the gas box 41.

[0042] Specifically, in this embodiment, during use, the protective gas delivery pipeline can be connected to the air inlet pipe 42 on multiple gas boxes 41, so that protective gas can be delivered into multiple gas boxes 41 simultaneously.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A walking back welding gas shield apparatus characterized by, include: An external traveling block (1) is provided with a plurality of first universal wheels (11) for rolling on the outer side wall of the pipe; An internal traveling block (2) is provided with a plurality of second universal wheels (21) for rolling on the inner wall of the pipe; An adsorption component is disposed between the outer walking block (1) and the inner walking block (2) for applying a relatively close force to the outer walking block (1) and the inner walking block (2); A gas shield (4) is installed on the internal travel block (2) for delivering protective gas to the weld seam on the inner wall of the pipe.

2. The walking back welding gas shield apparatus according to claim 1, wherein, The adsorption component includes: The first magnet (31) is installed on one side of the external walking block (1), and the external walking block (1) is provided with a mounting groove for installing the first magnet (31); The second magnet (32) is installed on one side of the internal walking block (2), and the internal walking block (2) is provided with a mounting groove for installing the second magnet (32).

3. The walking back welding gas shield apparatus as set forth in claim 2, wherein, The external walking block (1) has support legs extending outward on both sides. The support legs have columns (12) protruding towards the first magnet (31). The first universal wheel (11) is mounted on the column (12).

4. The walking back welding gas shield apparatus as set forth in claim 1, wherein, The gas protective cover (4) includes a plurality of gas boxes (41) connected in sequence. One side of each gas box (41) is provided with an opening for releasing protective gas. Two adjacent gas boxes (41) are hinged to each other, and a fixing component is provided between two adjacent gas boxes (41).

5. The walking back welding gas shield apparatus as set forth in claim 4, wherein, The gas box (41) includes a first connecting end (411) and a second connecting end (412). The first connecting end (411) of one of the two adjacent gas boxes (41) is inserted into the second connecting end (412) of the other gas box (41).

6. The walking back welding gas shield apparatus as set forth in claim 5, wherein, The fixing component includes: A fixing rod (5) is provided through the side wall of the second connecting end (412) and threadedly connected to the first connecting end (411) to press the side wall of the second connecting end (412) onto the first connecting end (411).

7. The walking back welding gas shield apparatus as set forth in claim 6, wherein The internal traveling block (2) and the gas protective cover (4) are spaced apart along the axial direction of the pipeline during use, and a connecting rod (6) connects the internal traveling block (2) and the gas protective cover (4).

8. The walking back welding gas shield apparatus as set forth in claim 7, wherein, One end of the connecting rod (6) is fixedly installed on the internal walking block (2). Two mounting plates (7) for mounting the connecting rod (6) are fixedly installed on the gas protective cover (4). Two fasteners (8) are threadedly connected to the connecting rod (6) and are respectively used to abut against the opposite sides of the two mounting plates (7).

9. The walking back welding gas shield apparatus as set forth in claim 4, wherein, An air inlet pipe (42) is fixedly installed on the side wall of the gas box (41), and a gas diffuser pipe (43) connected to the air inlet pipe (42) is installed inside the gas box (41). The gas diffuser pipe (43) is provided with multiple gas diffuser holes.

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