Circular tube welding auxiliary device

Abstract

The utility model discloses a circular tube welding auxiliary device which comprises a workbench, a support and a tube rotating assembly. The support and the tube rotating assembly are arranged on the workbench. The number of the supports is four, the supports are arranged between the round pipes to be welded and the workbench, and the number of the round pipes to be welded is two. Each support is of a semi-arc-shaped structure, rolling assemblies are arranged on the supports, each support is provided with 3-6 sets of rolling assemblies, and the rolling assemblies make rolling contact with a to-be-welded circular pipe. The two pipe rotating assemblies are connected with the two to-be-welded circular pipes correspondingly and rotate the to-be-welded circular pipes. The circular tube welding device solves the problems that when a circular tube is welded, the end face is not easy to align, axial movement is not easy to control, and circumferential rotation is inconvenient, and has the advantages of being high in accuracy and practicability.

Description

Technical Field

[0001] The present application relates to the technical field of welding equipment, and in particular to a round pipe welding auxiliary device. Background Art

[0002] The welding of metal round tubes is widely used in industrial production. Round tubes are widely used in pipelines, thermal equipment, machinery industry, petroleum geological drilling, containers and chemical industry, etc. The welding quality of round tubes is directly affected by their positioning, alignment and clamping. In traditional welding, two metal tubes are usually manually connected and then welded. The welding accuracy is not easy to guarantee, especially for the welding of large-diameter round tubes. The main problems encountered are: first, the end face of the round tube is not easy to align, and the end face alignment of the round tube directly affects the straightness of the pipe fittings after welding, as well as the uniformity and welding strength of the interface weld; second, the axial movement of the round tube is not easy to control, and the axial movement adjustment of the round tube will affect the width and strength of the weld; third, the circumferential rotation of the round tube is not easy, and the circumferential rotation control is not good during welding, which will affect the welding accuracy. Utility Model Content

[0003] The purpose of the utility model is to provide a round pipe welding auxiliary device to solve the problems mentioned in the background technology in view of the shortcomings of the prior art.

[0004] The problem described in the utility model is solved by the following technical solutions:

[0005] A round tube welding auxiliary device comprises a workbench and a bracket and a rotating tube assembly arranged thereon; there are 4 brackets, which are respectively arranged between the round tube to be welded and the workbench, and the number of round tubes to be welded is 2; the bracket structure is a semicircular arc structure, on which a rolling assembly is arranged, and 3-6 groups of the rolling assemblies are arranged on each of the brackets, and the rolling assemblies are in rolling contact with the round tube to be welded; there are 2 groups of rotating tube assemblies, which are respectively connected to two round tubes to be welded to rotate the round tubes to be welded.

[0006] The above-mentioned round tube welding operation device, the rotating tube assembly is composed of a center seat and a pushing piece; the pushing piece is a pneumatic cylinder or a hydraulic cylinder, one end of which is connected to the center seat, and the other end is connected to a tightening block, the tightening block can movably press and tightly contact the inner wall of the round tube to be welded, and the number of pushing pieces is 3-4; the center seat is provided with a rotating shaft coaxial with the round tube to be welded, and the rotating shaft is connected to a rotating wheel or the rotating shaft is connected to a driving motor.

[0007] The above-mentioned round tube welding operation device, the rolling assembly is composed of a universal ball and an adjusting screw connected thereto, a screw hole matching the adjusting screw is provided on the bracket, the adjusting screw is installed in the screw hole, the universal ball is in rolling contact with the arc wall of the round tube to be welded, and a hand wheel is provided at one end of the adjusting screw.

[0008] The above-mentioned round tube welding operation device is provided with a height adjustment component between the bracket and the workbench, and the height adjustment component can adopt a hydraulic cylinder or an electric cylinder.

[0009] The above-mentioned round tube welding operation device is additionally provided with a translation assembly between the bracket and the workbench. The translation assembly is composed of a slide rail arranged on the workbench and a slider arranged below the bracket. The slide rail is arranged along the axis of the round tube to be welded. Beneficial Effects

[0010] Compared with the prior art, the utility model has the following advantages: First, by arranging a semicircular bracket, a rolling assembly and a rotating tube assembly on the workbench, the circular tube to be welded can be easily and stably rotated in the circumferential direction, making the rotation of the circular tube easier to operate during welding, while improving the welding stability and accuracy, especially for large-diameter circular tubes. Second, the bracket and height adjustment assembly can facilitate the end face alignment during circular tube welding to ensure the straightness of the welded pipe fittings. Third, by adjusting the screw and the universal ball, the bracket can be adapted to circular tubes of different diameters to be welded. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a partial structural schematic diagram of the utility model;

[0014] Figure 3 It is another partial structural schematic diagram of the utility model bureau;

[0015] The symbols in the figure represent:

[0016] 1. Workbench, 2. Bracket, 3. Round pipe to be welded, 4. Rotating pipe assembly, 4-1. Center seat, 4-2. Push piece, 4-2-1. Tightening block, 4-3. Rotating shaft, 4-4. Rotating wheel, 5. Rolling assembly, 5-1. Universal wheel, 5-2. Adjusting screw, 6. Height adjustment assembly. DETAILED DESCRIPTION

[0017] See also Figure 1-3 The utility model includes a workbench 1 and a bracket 2 and a rotating tube assembly 4 arranged thereon; there are 4 brackets 2, which are respectively arranged between the circular tube 3 to be welded and the workbench 1, and the number of the circular tubes 3 to be welded is 2; the bracket 2 structure is a semicircular arc structure, and a rolling assembly 5 is arranged thereon, and 3-6 groups of the rolling assemblies 5 are arranged on each of the brackets 2, and the rolling assembly 5 is in rolling contact with the circular tube 3 to be welded; there are 2 groups of rotating tube assemblies 4, which are respectively connected to two of the circular tubes 3 to be welded to rotate the circular tube 3 to be welded.

[0018] One end face of two round tubes 3 to be welded is facing each other, and welding involves support, rotation, and axial straightness docking. Therefore, two brackets 2 can be set under each round tube 3 to be welded to ensure stability. At the same time, a rolling assembly 5 is set on the bracket 2 to facilitate the axial movement and circumferential rotation of the pipe 3 to be welded.

[0019] The rotating tube assembly 4 is provided to facilitate rotation during welding of large-diameter round tubes, and the following scheme can be adopted: the rotating tube assembly 4 is composed of a center seat 4-1 and a push piece 4-2; the push piece 4-2 is a pneumatic cylinder or a hydraulic cylinder, one end of which is connected to the center seat 4-1, and the other end is connected to a tightening block 4-2-1, and the tightening block 4-2-1 can be movably pressed and tightly contacted with the inner wall of the round tube 3 to be welded, and the number of the push pieces 4-2 is 3-4; the center seat 4-1 is provided with a rotating shaft 4-3 coaxial with the round tube to be welded, and the rotating shaft 4-3 is connected to a rotating wheel 4-4 or the rotating shaft 4-3 is connected to a driving motor.

[0020] The pushing member 4-2 can also adopt a double-screw structure, which is composed of a nut arranged in the middle and a first screw and a second screw respectively screwed on both ends of the nut. Threads with opposite rotation directions are arranged in the nut from the middle to both ends, and respectively form thread pairs with different rotation directions with the first screw and the second screw. By screwing the nut, the first screw and the second screw can be screwed out or screwed in at the same time, thereby playing a pushing role.

[0021] In order to facilitate the axial movement and circumferential rotation of the pipe to be welded, the rolling assembly can adopt the following scheme: the rolling assembly 5 is composed of a universal ball 5-1 and an adjusting screw 5-2 connected thereto, a screw hole matching the adjusting screw 5-2 is provided on the bracket 2, the adjusting screw 5-2 is installed in the screw hole, the universal ball 5-1 is in rolling contact with the arc wall of the circular pipe 3 to be welded, and a hand wheel is provided at one end of the adjusting screw 5-2. The rolling assembly 5 can also use a universal wheel instead of a universal ball.

[0022] By screwing the adjusting screw 5 - 2 , the universal ball 5 - 1 can be tightly fitted against the outer arc surface of the circular tube 3 to be welded, so that the bracket 2 can be suitable for circular tubes 3 to be welded with different diameters.

[0023] For butt welding between pipes of different diameters, in order to facilitate the adjustment of the height between the round pipes 3 to be welded, a height adjustment component 6 is provided between the bracket 2 and the workbench 1. The height adjustment component 6 may be a hydraulic cylinder or an electric cylinder.

[0024] To further facilitate the translation of the circular tube 3 to be welded, a translation component can be added between the bracket 2 and the workbench 1. The translation component consists of a slide rail arranged on the workbench 1 and a slider arranged under the bracket 2. The slide rail is arranged along the axis of the circular tube 3 to be welded, and a scale matching it can be set on the side of the slide rail to facilitate the precise control of the translation of the circular tube 3 to be welded, thereby accurately controlling the width of the welding seam between the circular tubes.

Claims

1. A round tube welding auxiliary device, characterized in that: The invention comprises a workbench (1), a bracket (2) and a rotating tube assembly (4) arranged thereon; the number of the brackets (2) is 4, which are respectively arranged between the circular tubes (3) to be welded and the workbench (1); the number of the circular tubes (3) to be welded is 2; the bracket (2) is a semicircular arc structure, on which a rolling assembly (5) is arranged, and 3 to 6 groups of the rolling assemblies (5) are arranged on each of the brackets (2), and the rolling assemblies (5) are in rolling contact with the circular tubes (3) to be welded; and the number of the rotating tube assemblies (4) is 2, which are respectively connected to two circular tubes (3) to be welded to rotate the circular tubes (3) to be welded.

2. The round pipe welding auxiliary device according to claim 1 is characterized in that: The rotating tube assembly (4) is composed of a center seat (4-1) and a push piece (4-2); the push piece (4-2) is a pneumatic cylinder or a hydraulic cylinder, one end of which is connected to the center seat (4-1) and the other end of which is connected to a tightening block (4-2-1); the tightening block (4-2-1) can be movably pressed against and in tight contact with the inner wall of the circular tube (3) to be welded, and the number of the push pieces (4-2) is 3-4; the center seat (4-1) is provided with a rotating shaft (4-3) coaxial with the circular tube to be welded, and the rotating shaft (4-3) is connected to a rotating wheel (4-4) or the rotating shaft (4-3) is connected to a driving motor.

3. The round pipe welding auxiliary device according to claim 1 is characterized in that: The rolling assembly (5) is composed of a universal ball (5-1) and an adjusting screw (5-2) connected thereto; a screw hole matching the adjusting screw (5-2) is provided on the bracket (2); the adjusting screw (5-2) is installed in the screw hole; the universal ball (5-1) is in rolling contact with the arc wall of the circular tube (3) to be welded; and a hand wheel is provided at one end of the adjusting screw (5-2).

4. The round pipe welding auxiliary device according to claim 1 is characterized in that: A height adjustment component (6) is provided between the support (2) and the workbench (1); the height adjustment component (6) may be a hydraulic cylinder or an electric cylinder.

5. The round pipe welding auxiliary device according to claim 1 is characterized in that: A translation assembly is provided between the support (2) and the workbench (1), the translation assembly consisting of a slide rail provided on the workbench (1) and a slider provided below the support (2), the slide rail being provided along the axis of the circular tube (3) to be welded.

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