Welding tool for bi-directionally clamping steel pipe

Abstract

The utility model discloses a welding tool for bi-directionally clamping steel pipes, and aims to solve the problems of difficulty in alignment, incoherence in welding, high labor intensity of workers and the like during splicing and welding of the steel pipes in the prior art. The tool comprises a base, clamp parts are arranged at the two ends of the base, the clamp parts are connected with centering clamps through ball bearings, and accurate clamping and alignment of steel pipes are achieved. The welding table is arranged in the middle of the base, and the two sides of the welding table are provided with roller carriers and rollers with adjustable intervals to support and assist the steel pipe in rotating. And the stability of the steel pipe in the welding process is ensured through the design of an anti-falling table and a guide block. In addition, the safety of welding personnel is effectively protected by adding the welding protection cover, and the welding quality is improved. By means of the ingenious structural design, efficient, safe and accurate welding of the steel pipe is achieved, the labor intensity of workers is reduced, the continuity and efficiency of welding operation are improved, and the steel pipe welding device has extremely high practical value and application prospects.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel pipe machining device field especially relates to a welding tool for bidirectional clamping steel pipe. BACKGROUND

[0002] In steel pipe structure engineering, pipeline laying and various industrial application scenes, the splicing welding of steel pipes is a crucial process link. Traditionally, when two steel pipes need to be welded end to end, the operator often faces many problems due to the lack of special fixture equipment.

[0003] In the prior art, the butt joint is usually performed by a simple support, a manual clamp or directly by a welder manually holding the steel pipe. This method has significant limitations and deficiencies. First, the steel pipes are difficult to accurately align during butt joint. Since the steel pipes have a certain weight and length, and there is a lack of stable and effective clamping devices, it is difficult to maintain the coaxiality and end face parallelism of the two steel pipes during butt joint, which not only affects the welding quality, but also may result in substandard weld strength and even cause safety hazards. Second, the worker needs to manually rotate around the steel pipe during welding, which not only increases the labor intensity, but also seriously affects the continuity and efficiency of welding. Welding is a work that requires high skill, and long-time manual operation can easily lead to fatigue, thereby affecting the stability and precision of welding, especially when working at high altitude or in narrow space.

[0004] Therefore, it is a technical problem to be solved by those skilled in the art to develop a welding tool for bidirectional clamping of steel pipes that can ensure the butt joint accuracy of steel pipes, improve the welding efficiency, and reduce the burden on workers. SUMMARY

[0005] To solve the problems in the background art, the utility model provides a welding tool for bidirectional clamping of steel pipes to effectively solve the problems of difficult alignment during steel pipe splicing welding, improve the continuity of welding, and reduce the labor intensity of workers. The device includes a base, two clamping parts are arranged at both ends of the base, the clamping part includes a clamping table, a ball bearing is arranged outside the upper part of the clamping table, the inner ring of the ball bearing is connected to the clamping table, a centering clamp is connected to the outer side of the outer ring of the ball bearing, a welding table is arranged in the middle of the base, two long slot holes are formed on both sides of the welding table, a roller frame is arranged in the long slot hole, a roller is arranged on the upper part of the roller frame, and a roller is arranged on the left and right of the welding table. The connected steel pipe is clamped by the clamping part and connected on the roller, the connected steel pipe is rotated by the clamping part and the roller, and the operator or welding robot can rotate the connected part from above.

[0006] Further, two said roller frames are connected with springs, the spring can realize the automatic opening and closing between the roller frames, so as to adjust the distance between the rollers, so as to adapt to the steel pipe of different diameters.

[0007] Further, the clamp part and the welding table are provided with an anti-falling table, and the lower part of the anti-falling table is provided with an anti-falling seat, and the anti-falling table is used for supporting the steel pipe to be machined with large weight.

[0008] Further, two waist holes are formed on the outer side of the anti-falling table, a pair of guide blocks are arranged on the waist holes, the guide blocks are "L" shaped with chamfer, the guide blocks can adjust the position in the waist hole, and the guide blocks are used for guiding the steel pipe to be machined to move forward to the roller.

[0009] Preferably, the device further comprises a welding protective cover, the welding protective cover comprises four supporting legs, the supporting legs are arranged on the base, the welding protective cover is arranged above the welding table, is used for protecting the welder, the welding protective cover is a circular arc cover, a welding working gap is formed in the middle of the welding protective cover, and the welding working gap is used for extending into the welding equipment to weld the steel pipe.

[0010] Preferably, the centering clamp comprises an outer ring and an inner ring, three radial grooves are uniformly distributed on the outer ring and arranged in the radial direction, three circumferential grooves are uniformly distributed on the inner ring and arranged in the circumferential direction, the radial grooves are correspondingly arranged with the circumferential grooves, the centering clamp further comprises three clamping jaws, one end of the clamping jaw is connected in the radial groove, and the other end of the clamping jaw is connected in the circumferential groove, the inner ring is rotated to drive the clamping jaw to slide in the radial groove and the circumferential groove, and the workpiece is clamped.

[0011] The device has the advantages and beneficial effects that: the clamp part at both ends of the device is designed with the centering clamp connected with the ball bearing, the coaxiality and the end face parallelism of the connected steel pipe can be kept high in precision during clamping, and the preparation efficiency before welding and the welding quality are greatly improved. The clamping jaw of the centering clamp is designed, the inner ring is rotated to drive the clamping jaw to slide in the radial groove and the circumferential groove, the stable and uniform clamping of the steel pipe is realized, and the deviation and shaking in the welding process are effectively prevented. The adjustable roller frame and the roller arranged on the two sides of the welding table make the connected steel pipe rotate easily under the clamping of the clamp part, the workers do not need to manually rotate around the steel pipe, the continuity of welding and the operation efficiency are greatly improved. Meanwhile, the spring design between the roller frames makes the device automatically adapt to the steel pipe of different diameters, and the universality and flexibility of the device are enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and all other drawings obtained by those skilled in the art without creative efforts based on these drawings also belong to the protection scope of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the positional words such as "upper" and "lower" generally refer to the upper and lower of the device in the actual use or working state, and specifically refer to the direction of the drawing in the drawings. And "inner" and "outer" are relative to the outline of the device.

[0013] Figure 1 The main structure diagram of the present application.

[0014] Figure 2 The schematic diagram of the present application with a welding protective cover.

[0015] Figure 3 The front view of the present application.

[0016] 1-base, 2-clamp part, 21-clamp table, 22-roller bearing, 23-centering clamp, 231-outer ring, 232-inner ring, 233-radial groove, 234-circumferential groove, 235-claw, 3-welding table, 31-long hole, 32-roller frame, 33-roller, 34-spring, 4-anti-drop table, 41-anti-drop seat, 42-waist hole, 43-guide block, 5-welding protective cover, 51-leg, 52-welding work gap. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the positional words such as "upper" and "lower" generally refer to the upper and lower of the device in the actual use or working state, and specifically refer to the direction of the drawing in the drawings. And "inner" and "outer" are relative to the outline of the device.

[0018] As Figure 1 , Figure 2 and Figure 3As shown, the equipment mainly comprises a base 1, a clamp part 2 and a welding table 3, the base 1 serves as a support platform of the whole tooling, and two clamp parts 2 are fixedly installed at two ends of the base 1 respectively. Each clamp part 2 comprises a clamp table 21, a ball bearing 22 is fixedly connected to the outer side above the clamp table 21 through a bearing seat, the inner ring of the ball bearing 22 is tightly connected with the clamp table 21 to ensure smooth rotation. The outer ring of the ball bearing 22 is fixedly connected with a centering clamp 23 through bolts or keys on the outer side, for accurately clamping the steel pipe.

[0019] The centering clamp 23 is composed of an outer ring 231 and an inner ring 232, and the two are relatively rotated through bearings. The outer ring 231 is uniformly provided with three radially arranged radial grooves 233, for mounting one end of a clamping jaw 235. The inner ring 232 is correspondingly provided with three circumferentially arranged circumferential grooves 234, and the other end of the clamping jaw 235 is arranged in the circumferential grooves 234. When the inner ring 232 rotates, the clamping jaw 235 slides in the radial grooves 233 and the circumferential grooves 234 to uniformly clamp the steel pipe.

[0020] A welding table 3 is arranged in the middle of the base 1, and long holes 31 are formed on both sides of the welding table 3 for mounting roller frames 32. The roller frames 32 are fixed in the long holes 31 through sliding rails or bolts, and can be adjusted in position along the length of the holes. The roller frames 32 are connected through springs 34 to realize automatic opening and closing, so as to adjust the distance between the rollers 33 to adapt to steel pipes of different diameters. The rollers 33 are installed on the upper part of the roller frames 32 for supporting and assisting the rotation of the steel pipe.

[0021] A drop prevention table 4 is arranged between the welding table 3 and the clamp part 2, and a drop prevention seat 41 is fixedly arranged on the lower part of the drop prevention table 4 for supporting steel pipes with relatively large weight. A waist hole 42 is formed on the outer side above the drop prevention table 4, and a guide block 43 which can slide along the length of the hole is arranged in the waist hole 42. The guide block 43 is in the shape of "L" with a chamfer, for guiding the steel pipe to move accurately onto the rollers 33 and ensuring the stability of the steel pipe during welding.

[0022] A welding protective cover 5 is fixedly installed on the base 1 through four supporting legs 51, and the cover body is in the shape of a circular arc and covers above the welding table 3. A welding working gap 52 is left in the middle of the welding protective cover 5, so as to facilitate the welding equipment to extend in for work, and at the same time protect the welding personnel from the harm of sparks and harmful gases.

[0023] Specific use steps are as follows:

[0024] In this embodiment, first, according to the diameter of the steel pipe to be welded, the rollers 33 are adjusted to the appropriate distance by adjusting the spring 34 between the roller holders 32. Then, one end of the steel pipe is placed in the clamp part 2 on one side, and the jaws 235 of the centering clamp 23 are used for preliminary clamping. Next, the other end of the steel pipe is pushed to the clamp part 2 on the other side through the guidance of the guide block 44, and is also clamped by the centering clamp 23. At this time, the two ends of the steel pipe are firmly clamped and the coaxiality is maintained, and the middle part is supported by the rollers 33 and can rotate freely.

[0025] Finally, the welder or welding robot can continuously rotate the welding of the butt joint of the steel pipe through the welding work slit 52 of the welding protective cover 5. The whole process does not need to manually rotate the steel pipe, greatly improves the continuity and efficiency of welding, and ensures the welding quality and operation safety.

[0026] The welding tool for bidirectional clamping of steel pipes provided by the utility model is described in detail above. In this paper, specific examples are applied to explain the principles and implementation methods of the invention. The above description of the embodiments is only used to help understand the method of the utility model and its core idea. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the invention without departing from the principles of the invention, and these improvements and modifications also fall within the protection scope of the claims of the utility model.

Claims

1. A welding tool for bidirectional clamping of a steel pipe, comprising a base (1), two clamping portions (2) are arranged at both ends of the base (1) respectively, characterized in that, The clamp part (2) includes a clamp table (21), a ball bearing (22) is arranged above the outer side of the clamp table (21), the inner ring of the ball bearing (22) is connected with the clamp table (21), the outer ring of the ball bearing (22) is connected with a centering clamp (23) on the outer side, a welding table (3) is arranged in the middle of the base (1), two long holes (31) are formed on the two sides of the welding table (3), a roller frame (32) is arranged in the long hole (31), a roller (33) is arranged on the upper part of the roller frame (32), and one roller (33) is arranged on the left and right of the welding table (3).

2. The welding fixture for bidirectionally clamping a steel pipe according to claim 1, characterized by The spring (34) is connected between the two roller frames (32).

3. The welding fixture for bidirectionally clamping a steel pipe according to claim 2, wherein The clamp part (2) and the welding table (3) are provided with an anti-falling table (4), the anti-falling table (4) is provided with an anti-falling seat (41) on the lower part, two waist holes (42) are formed on the outer side of the upper part of the anti-falling table (4), a pair of guide blocks (43) are arranged on the waist hole (42), the guide block (43) is a "L" shape with a chamfer, and the guide block (43) can adjust the position in the waist hole (42) by itself.

4. A welding fixture for bidirectional clamping of a steel pipe according to any one of claims 1 to 3, characterized in that, The tool further comprises a welding protective cover (5), the welding protective cover (5) comprises four supporting legs (51), the supporting legs (51) are arranged on the base (1), the welding protective cover (5) is arranged above the welding table (3), the welding protective cover (5) is a circular arc cover, and a welding working gap (52) is formed in the middle of the welding protective cover (5).

5. The welding fixture for bidirectionally clamping a steel pipe according to claim 4, wherein The centering clamp (23) comprises an outer ring (231) and an inner ring (232), three radially arranged radial grooves (233) are uniformly distributed on the outer ring (231), three circumferentially arranged circumferential grooves (234) are uniformly distributed on the inner ring (232), the radial grooves (233) and the circumferential grooves (234) are correspondingly arranged, the centering clamp further comprises three clamping jaws (235), one end of the clamping jaw (235) is connected in the radial groove (233), the other end is connected to the circumferential groove (234), the inner ring (232) is rotated to drive the clamping jaw (235) to slide in the radial groove (233) and the circumferential groove (234), and the workpiece is clamped.

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