Movable narrow-gap welding device used on site

Abstract

The utility model relates to a movable narrow-gap welding device used on site, and belongs to the technical field of welding. According to the technical scheme, a two-dimensional moving mechanism composed of two sliding tables is arranged on a moving device (1), a narrow-gap welding gun (2) and a laser sensing device (3) are arranged on the two-dimensional moving mechanism, and the two-dimensional moving mechanism drives the narrow-gap welding gun (2) and the laser sensing device (3) to move in the left-right direction and the up-down direction of a welding seam; a welding gun rod (201) is arranged on a welding gun body (220) of the narrow-gap welding gun (2), the bottom of the welding gun rod (201) is connected with an offset contact tube (211), and the offset contact tube (211) is driven to rotate in a reciprocating mode or continuously rotate by rotating the welding gun rod (201). The welding device has the advantages of being simple in structure, light in weight, flexible to disassemble and assemble, stable, reliable, capable of being suitable for large-size-range-change groove welding, especially suitable for welding under the site construction condition, and good in welding quality.

Description

Technical Field

[0001] The utility model relates to a movable narrow gap welding device used on site, belonging to the technical field of welding. Background Art

[0002] With the rapid development of modern manufacturing, thick structures welded from plates and pipes are increasingly used in industries such as shipbuilding, marine engineering, pressure vessels (nuclear power industry), pressure pipelines, and petrochemicals. These thick structures have many problems when welded using traditional welding methods, such as large filling volume, low welding efficiency, large welding heat input, and poor mechanical properties. If narrow gap welding technology is used to weld thick structures, such as Chinese patent CN202011546863.0 (a narrow gap welding method using a rotating electrode composite rotating arc), etc., the filling material can be greatly reduced, the welding heat input can be reduced, and the welding production cost can be reduced while improving the welding productivity. It has broad application prospects in the welding of thick components. However, the existing narrow gap welding devices are complex in structure and heavy in weight, and are mainly used for welding in production lines or workstations in factories. The existing narrow gap welding equipment has extremely high requirements on the workpiece assembly accuracy, and the welding equipment is not movable. Therefore, it is not suitable for welding large components or components with complex structures, nor can it meet the needs of on-site construction welding with a large range of groove size variations and poor assembly accuracy. These are common bottleneck problems that limit the widespread application of narrow gap welding technology. Utility Model Content

[0003] The utility model aims to provide a movable narrow gap welding device for on-site use, which has a simple structure, light weight, flexible disassembly and assembly, stability and reliability, can adapt to large groove welding with varying size ranges, reduces the accuracy requirements for workpiece assembly, is particularly suitable for welding under on-site construction conditions, has good welding quality, and solves the above-mentioned technical problems existing in the prior art.

[0004] The technical solution of the utility model is:

[0005] A movable narrow gap welding device for on-site use comprises a moving device, a narrow gap welding gun, a laser sensor device and a track, wherein the track is installed on a workpiece to be welded along the direction of a weld, the narrow gap welding gun and the laser sensor device are arranged on the moving device, and the moving device is installed on the track, driving the narrow gap welding gun and the laser sensor device to move along the direction of the weld; the moving device is provided with a two-dimensional moving mechanism composed of two slides, the narrow gap welding gun and the laser sensor device are arranged on the two-dimensional moving mechanism, and the two-dimensional moving mechanism drives the narrow gap welding gun and the laser sensor device to move along the left and right directions of the weld and the up and down directions of the weld to realize the swing welding of the welding gun; the welding gun body of the narrow gap welding gun is provided with a welding gun rod, and the bottom of the welding gun rod is connected to an offset conductive nozzle, and the offset conductive nozzle is driven to reciprocate or continuously rotate by rotating the welding gun rod to realize narrow gap welding; the laser sensor device is used to detect the groove size and the weld position. The laser sensor device and the offset conductive nozzle are both well known and commonly used in the art.

[0006] A rotating block is installed on the welding gun body of the narrow gap welding gun, and a water cooling channel is provided in the rotating block, which is respectively connected to the water cooling cable connector and the water cooling connector one; a gear three is installed at the lower end of the rotating block; a welding gun rod is installed at the center of the rotating block, and an offset conductive nozzle is provided at the lower end of the welding gun rod.

[0007] The welding gun body is equipped with a motor 4, and a gear 2 is installed at the lower end of the motor 4; the gear 2 is meshed with the gear 3, and driven by the motor 4, the welding gun rod is driven to perform reciprocating or continuous rotational motion.

[0008] An adjustment block is installed on the side of the welding gun body, an adjustment rod is installed on the adjustment block, a connecting plate is installed at the lower end of the adjustment rod, and a secondary protective gas hood is installed on the connecting plate; the adjustment block adjusts the adjustment rod to move up and down, thereby driving the secondary protective gas hood to move up and down. The secondary protective gas hood is provided with a second water cooling pipe and a secondary protective gas joint.

[0009] A water cooling pipe is provided on both sides of the welding gun rod, the lower ends of the two water cooling pipes are connected, the upper ends of the two water cooling pipes are connected to water cooling joints, and the water cooling pipe passes cooling water to cool the welding gun rod; a primary protective air pipe is provided on both sides of the two water cooling pipes, and a primary protective air nozzle is installed at the lower end of the primary protective air pipe.

[0010] The moving device includes a base, on the upper end of which slide one is installed, on which slide one is provided with a motor two for driving slide one to move up and down; on slide one slide two is installed, on which slide two is provided with a motor three for driving slide two to move left and right along the weld.

[0011] The slide table 2 is provided with a mounting block 1, and a joint adapter block is installed on the mounting block 1. The welding gun water pipe, air pipe and conductive cable are directly connected to the joint adapter block to avoid being dragged during welding; the slide table 2 is provided with a mounting block 2, and a mounting block 3 is provided on the mounting block 2.

[0012] The utility model can directly perform narrow gap welding on thick structures on site. Since the narrow gap welding gun can swing for welding and can be adjusted in multiple directions and angles according to the welding needs on site, it can adapt to the welding of large grooves with varying sizes and reduce the accuracy requirements for workpiece assembly. The ordinary narrow gap welding device is applicable to the groove range of 8-10mm, and the utility model is applicable to the groove range of 6-30mm.

[0013] The beneficial effects of the utility model are: simple structure, light weight, flexible disassembly and assembly, stability and reliability, and the ability to adapt to large groove welding with varying size ranges, reducing the accuracy requirements for workpiece assembly, and being particularly suitable for welding under on-site construction conditions with good welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the overall structure diagram of the equipment in the embodiment of the utility model;

[0015] Figure 2 This is an axial view of the mobile device of the embodiment of the utility model (excluding the housing);

[0016] Figure 3 This is a front view of the mobile device of the embodiment of the utility model (excluding the housing);

[0017] Figure 4 This is an axial view of a narrow gap welding gun according to an embodiment of the utility model;

[0018] Figure 5 This is a front view of a narrow gap welding gun according to an embodiment of the utility model;

[0019] Figure 6 It is a side view of a narrow gap welding gun according to an embodiment of the utility model;

[0020] Figure 7 This is a cross-sectional view of a narrow gap welding gun according to an embodiment of the utility model;

[0021] Figure 8 This is a track axis view of an embodiment of the utility model;

[0022] In the figure: moving device 1, narrow gap welding gun 2, laser sensor device 3, track 4, base 101, motor 1 102, gear 1 103, guide wheel 104, slide 1 105, motor 2 106, slide 2 107, motor 3 108, mounting block 1 109, joint adapter block 110, mounting block 2 111, mounting block 3 112, welding gun rod 201, motor 4 202, gear 2 203, gear 3 204, rotating block 205, Secondary protective gas hood 206, primary protective gas nozzle 207, connecting plate 208, adjusting rod 209, mounting block four 210, offset conductive nozzle 211, water cooling pipe two 212, secondary protective gas connector 213, primary protective gas pipe 214, water cooling connector two 215, water cooling pipe one 216, adjusting block 217, water cooling cable connector 218, water cooling connector one 219, welding gun body 220, track base 401, guide rail 402, rack 403. DETAILED DESCRIPTION

[0023] The present invention will be further described below through examples in conjunction with the accompanying drawings.

[0024] A movable narrow gap welding device for use on site comprises a moving device 1, a narrow gap welding gun 2, a laser sensor device 3 and a track 4, wherein the track 4 is installed on a workpiece to be welded along a weld direction, the narrow gap welding gun 2 and the laser sensor device 3 are arranged on the moving device 1, and the moving device 1 is installed on the track to drive the narrow gap welding gun 2 and the laser sensor device 3 to move along the weld direction; the moving device 1 is provided with a two-dimensional moving mechanism composed of two slides, the narrow gap welding gun 2 and the laser sensor device 3 are arranged on the two-dimensional moving mechanism, and the two-dimensional moving mechanism drives the narrow gap welding gun 2 and the laser sensor device 3 to move along the left-right direction of the weld and the up-down direction of the weld to realize welding gun swing welding; a welding gun body 220 of the narrow gap welding gun 2 is provided with a welding gun rod 201, the bottom of the welding gun rod 201 is connected to a biased conductive nozzle 211, and the biased conductive nozzle 211 is driven to reciprocate or continuously rotate by rotating the welding gun rod 201 to realize narrow gap welding; the laser sensor device 3 is used to detect the groove size and the weld position. The laser sensor device 3 and the biased conductive nozzle 211 are both well known and commonly used in the art.

[0025] A rotating block 205 is installed on the welding gun body 220 of the narrow gap welding gun 2, and a water cooling channel is provided in the rotating block 205, which is respectively connected to the water cooling cable connector 218 and the water cooling connector 1 219; a gear 3 204 is installed at the lower end of the rotating block 205; a welding gun rod 201 is installed at the center of the rotating block 205, and an offset conductive nozzle 211 is provided at the lower end of the welding gun rod 201.

[0026] The welding gun body 220 is mounted with a motor 4 202 , and a gear 203 is mounted at the lower end of the motor 4 202 ; the gear 203 is meshed with the gear 3 204 , and driven by the motor 4 202 , the welding gun rod 201 is driven to perform reciprocating or continuous rotational motion.

[0027] An adjustment block 217 is installed on the side of the welding gun body 220, an adjustment rod 209 is installed on the adjustment block 217, a connecting plate 208 is installed at the lower end of the adjustment rod 209, and a secondary protective gas hood 206 is installed on the connecting plate 208; the adjustment block 217 adjusts the adjustment rod 209 to move up and down, thereby driving the secondary protective gas hood 206 to move up and down; a water cooling pipe 212 and a secondary protective gas joint 213 are provided on the secondary protective gas hood 206.

[0028] Water cooling pipes 216 are respectively arranged on both sides of the welding gun rod 201, the lower ends of the two water cooling pipes 216 are connected, and the upper ends of the two water cooling pipes 216 are respectively connected to water cooling joints 215, and cooling water is passed through the water cooling pipes 216 to cool the welding gun rod 201; primary protective air pipes 214 are respectively arranged on both sides of the two water cooling pipes 216, and a primary protective air nozzle 207 is installed at the lower end of the primary protective air pipe 214.

[0029] A mounting block 210 is provided on the side of the welding gun body 220 and is connected to the mounting block 3 112 in the mobile device 1 .

[0030] The laser sensor device 3 is mounted on the adjustment block 217 and is disposed at the front end of the welding gun rod 201 to detect the welding groove size and weld position information.

[0031] The mobile device 1 includes a base 101, on which a motor 102 is installed. A gear 103 is installed at the lower end of the motor 102 for engaging with a rack 403 on the guide rail 4 to drive the mobile device 1 to move along the rail 4. Two sets of guide wheels 104 are provided at the bottom of the base 101.

[0032] A slide 105 is installed on the upper end of the base 101, and a motor 106 is provided on the slide 105 for driving the slide 105 to move up and down; a slide 107 is installed on the slide 105, and a motor 3 108 is provided on the slide 107 for driving the slide 107 to move left and right along the weld.

[0033] A mounting block 109 is arranged on the slide 107, a joint adapter block 110 is arranged on the mounting block 109, and the welding gun water pipe, air pipe and conductive cable are directly connected to the joint adapter block 110 to avoid being dragged during welding; a mounting block 111 is arranged on the slide 107, a mounting block 3 112 is arranged on the mounting block 111, and a mounting block 4 210 is arranged on the mounting block 3 112.

[0034] The track 4 includes a track base 401, a guide rail 402 and a rack 403. The track base 401 is directly installed on the workpiece to be welded, and the guide rail is set parallel to the weld direction. The rack 403 is installed on the side of the guide rail 402, which meshes with the gear 103 in the mobile device 1 and works together with the guide wheel 104 to drive the mobile device 1 to move along the guide rail 402.

[0035] In the embodiment, the workpiece to be welded is located at the welding and installation site of the cylinder base in the wind power industry, and its main structure is flat plate butt welding, thickness: 50mm-100mm, length: 2.4-3.6m, and material is Q355B. Due to the heavy size and weight of the component, poor assembly accuracy, and large groove variation range, it cannot be welded in the workshop using a narrow gap welding device.

[0036] If the narrow gap welding device of the existing technology is used, the workpiece to be welded needs to be decomposed into multiple small-sized structural parts, and then welded in the workshop using the narrow gap welding device, and then these small-sized components are welded and assembled on site. The existing problems are: the on-site assembly accuracy is poor, and submerged arc welding is generally used for multi-layer and multi-pass welding, which has low welding efficiency, large welding deformation, and a lot of welding consumables.

[0037] When the utility model is used to weld the above-mentioned workpiece to be welded, the track 4 is directly installed on the workpiece to be welded along the direction of the weld, and the moving device 1, the narrow gap welding gun 2 and the laser sensor device 3 are installed. The specific welding operation process of the utility model is as follows: under the drive of the motor 102, the moving device 4 drives the narrow gap welding gun 2 and the laser sensor device 3 to move along the direction of the weld. The laser sensor device 3 is arranged in front of the narrow gap welding gun 2 to detect the size and position deviation of the root of the groove, and feeds the result back to the control system. The control system controls the motor 3 108 to rotate according to the detection result, and drives the slide 2 107 to move along the left and right direction of the weld. On the one hand, the narrow gap welding gun 2 is adjusted to always be at the center position of the weld during the welding process. On the other hand, when the groove is large, the narrow gap welding gun 2 is driven to swing according to the set parameters; at the same time, the control system drives the motor 4 202 to rotate according to the detection result, drives the welding gun rod 201 and the offset conductive nozzle 211 to reciprocate or continuously rotate according to the set parameters, realizes the movement of the arc inside the groove, and completes the first layer of narrow gap welding process. Then, according to the single-layer welding thickness, the motor 2 106 is driven to adjust the position of the slide 105, and the narrow gap welding gun 2 is raised to a suitable position. At the same time, in order to ensure a good weld protection effect, the secondary protective gas hood 206 is moved to a suitable position through the adjustment block 217 and the adjustment rod 209, and the above welding process is repeated until the entire welding process is completed.

[0038] The control system in the embodiment is a control system known and used in the art, and a corresponding control program can be compiled as needed to realize the control function. Since the narrow gap welding gun of the utility model can be swung for welding and can be adjusted in multiple directions and angles according to the welding needs on site, it can adapt to the welding of large grooves with varying sizes, and reduce the accuracy requirements for the workpiece assembly.

Claims

1. A movable narrow gap welding device for on-site use, characterized in that: The invention comprises a moving device (1), a narrow gap welding gun (2), a laser sensor device (3) and a track (4), wherein the track (4) is installed on a workpiece to be welded along the direction of the weld, the narrow gap welding gun (2) and the laser sensor device (3) are arranged on the moving device (1), and the moving device (1) is installed on the track to drive the narrow gap welding gun (2) and the laser sensor device (3) to move along the direction of the weld; the moving device (1) is provided with a two-dimensional moving mechanism composed of two slides, the narrow gap welding gun (2) and the laser sensor device (3) are arranged on the two-dimensional moving mechanism, and the two-dimensional moving mechanism drives the narrow gap welding gun (2) and the laser sensor device (3) to move along the left-right direction and the up-down direction of the weld; a welding gun body (220) of the narrow gap welding gun (2) is provided with a welding gun rod (201), the bottom of the welding gun rod (201) is connected to an offset conductive nozzle (211), and the offset conductive nozzle (211) is driven to reciprocate or continuously rotate by rotating the welding gun rod (201).

2. A movable narrow gap welding device for use on site according to claim 1, characterized in that: A rotating block (205) is mounted on a welding gun body (220) of the narrow gap welding gun (2); a water cooling channel is provided in the rotating block (205) and is respectively connected to a water cooling cable connector (218) and a water cooling connector 1 (219); a gear 3 (204) is mounted on the lower end of the rotating block (205); a welding gun rod (201) is mounted at the center of the rotating block (205); and an offset conductive nozzle (211) is provided on the lower end of the welding gun rod (201).

3. A movable narrow gap welding device for use on site according to claim 2, characterized in that: Motor 4 (202) is installed on the welding gun body (220), and gear 2 (203) is installed at the lower end of motor 4 (202); gear 2 (203) is meshed with gear 3 (204).

4. The movable narrow gap welding device for on-site use according to claim 3, characterized in that: Water cooling pipes (216) are respectively arranged on both sides of the welding gun rod (201); the lower ends of the two water cooling pipes (216) are connected, and the upper ends of the two water cooling pipes (216) are respectively connected to water cooling joints (215); primary protective air pipes (214) are respectively arranged on both sides of the two water cooling pipes (216); and a primary protective air nozzle (207) is installed at the lower end of the primary protective air pipe (214).

5. A movable narrow gap welding device for use on site according to claim 1 or 2, characterized in that: The mobile device (1) comprises a base (101), a slide platform (105) is mounted on the upper end of the base (101), and a motor (106) is disposed on the slide platform (105); a slide platform (107) is mounted on the slide platform (105), and a motor (108) is disposed on the slide platform (107).

6. The movable narrow gap welding device for on-site use according to claim 5, characterized in that: The slide table 2 (107) is provided with a mounting block 1 (109), and a joint adapter block (110) is installed on the mounting block 1 (109); a welding gun water pipe, an air pipe and a conductive cable are directly connected to the joint adapter block (110); the slide table 2 (107) is provided with a mounting block 2 (111), and a mounting block 3 (112) is provided on the mounting block 2 (111).

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