CN210387934U

CN210387934U - Multi-tube coaxial assembly welding device

Info

Publication number: CN210387934U
Application number: CN201920763273.XU
Authority: CN
Inventors: 董小伟; 周文; 沈慧军
Original assignee: China Merchants Heavy Industry Jiangsu Co Ltd
Current assignee: China Merchants Heavy Industry Jiangsu Co Ltd
Priority date: 2019-05-25
Filing date: 2019-05-25
Publication date: 2020-04-24
Anticipated expiration: 2029-05-25

Abstract

The utility model discloses a coaxial assembly welding set of multitube. The axes of the pipes are marked by the laser theodolite and the light target which are respectively arranged at the two ends of the pipe to be welded, and whether the pipe is coaxial with the axes marked by the laser theodolite and the light target is detected by the adjustable tool arranged at the center of a circle of the end surface of each pipe. When the light emitted by the laser theodolite can not pass through the through hole in the center of the adjustable tool, the position and the direction of the pipe are adjusted through the jig frame which plays a role in supporting and adjusting the lower part of the pipe. Therefore, the utility model discloses can be at the welded overall process, remain each throughout the central axis of pipe all accords with the laser theodolite jets out the axial that light marked to guarantee welded axiality, can also pass through the position of laser beam, swift completion inspection work.

Description

Multi-tube coaxial assembly welding device

Technical Field

The utility model relates to a shipbuilding technical field especially relates to a coaxial assembly welding set of multitube.

Background

In actual engineering practice, the situation of assembling and welding multiple pipes often occurs. Sometimes, certain pipe elements place considerable demands on the coaxiality of the pipe elements after welding.

Take the stern tube in the ship project as an example. The stern shaft tube consists of three sections of tubes. The coaxiality between three sections of pipes after welding is required to reach more than 0.1mm by the design.

However, in actual welding, due to the fact that the pipe fitting is large in size and heavy in weight, the axis of the pipe fitting is difficult to be completely centered in actual operation, and centering difficulty is high. The current technology is difficult to realize the assembly and inspection under the coaxiality.

SUMMERY OF THE UTILITY MODEL

The utility model provides a coaxial assembly welding set of multitube, it can ensure that the axiality when multitube requires coaxial arrangement reaches more than 0.1mm, and convenient operation and inspection.

The utility model provides a coaxial assembly welding set of multitube, include: the adjustable tool is arranged on each end face of each pipe to be welded, a circular plate with holes is arranged in the center of the adjustable tool, and through holes in the middle of the circular plate with holes are respectively arranged at the circle center positions of the arranged end faces; the laser theodolite is arranged outside the outermost end face of the outermost pipe to be welded and used for emitting light to the other end of the pipe; the laser theodolite is arranged on the other side of the pipe to be welded, the distance between the light target and the laser theodolite at least reaches the sum of the lengths of the pipes, the height between the light target and the laser theodolite from the ground at least reaches the radius of the pipes, and the light emitted by the laser theodolite is just positioned at the center of the light target; and the jig frame is arranged on the lower side of each pipe and used for supporting the pipes and adjusting the position and the height of each pipe so as to enable the light emitted by the laser theodolite to pass through each through hole in the middle of the circular plate with the hole and fall into the center of the light target in the welding process.

Optionally, in the above apparatus, the adjustable fixture includes: the first end of each turnbuckle is directly or indirectly fixed on the end surface of the inner wall of the pipe; the thin steel wire is connected between the other end of the turnbuckle and the circular plate with the hole and is used for fixing the circular plate with the hole; the middle of the circular plate with the hole is provided with a through hole for the light emitted by the laser theodolite to pass through.

Optionally, in the above device, the diameter of the through hole in the middle of the circular plate with the hole is not more than 0.1 mm.

Optionally, in the above apparatus, the thin steel wires and the turnbuckle connected thereto have the same size; in each adjustable tool, the angle between each thin steel wire and each turnbuckle is 120 degrees.

Advantageous effects

The utility model provides a coaxial assembly welding set of multitube, it is through setting up respectively in the axle center of waiting the laser theodolite and the light target mark pipe at welded pipe both ends, detects the pipe through the adjustable frock that sets up in the terminal surface centre of a circle department of each pipe whether coaxial with the axle center that laser theodolite, light target mark. When the light emitted by the laser theodolite can not pass through the through hole in the center of the adjustable tool, the position and the direction of the pipe are adjusted through the jig frame which plays a role in supporting and adjusting the lower part of the pipe. Therefore, the utility model discloses can be at the welded overall process, remain each throughout the central axis of pipe all accords with the laser theodolite jets out the axial that light marked to guarantee welded axiality, can also pass through the position of laser beam, swift completion inspection work.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic diagram of an adjustable tooling for marking the center of each tube of the present invention;

fig. 2 is a schematic diagram of the principle of the multi-pipe coaxial assembly welding in the present invention.

In the drawings, 1 denotes a pipe; 2 denotes a turnbuckle; 3 represents a thin steel wire; 4 represents a perforated circular plate; 5 denotes a ruler; 6 denotes a laser theodolite; 7 denotes a first pipe to be welded; 8 denotes a second pipe to be welded; 9 denotes a third tube to be welded; 10 denotes a light target; and 11 denotes a jig frame.

Detailed Description

In order to make the purpose and technical solution of the embodiments of the present invention clearer, the following description will clearly and completely describe the technical solution of the embodiments of the present invention by combining the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Referring to fig. 2, the present invention firstly provides a multi-tube coaxial assembly welding device, which includes:

the adjustable tooling is arranged on each end face of each pipe needing to be welded. The center of each adjustable tool is provided with a circular plate with holes 4, the through holes in the middle of the circular plate with holes 4 are respectively arranged at the circle center positions of the end surfaces arranged on the circular plate with holes, and the adjustable tool further comprises the following components shown in figure 1: the first end of each turnbuckle 2 is directly or indirectly fixed on the end surface of the inner wall of the pipe; a thin steel wire 3 connected between the other end of the turnbuckle 2 and the perforated circular plate 4 for fixing the perforated circular plate 4; the middle of the circular plate with the hole 4 is provided with a through hole for the light emitted by the laser theodolite 6 to pass through.

The laser theodolite 6 is arranged outside the outermost end face of the outermost pipe to be welded and used for emitting light to the other end of the pipe;

the light target 10 is arranged outside the end face of the other side of the pipe to be welded, the distance between the light target 10 and the laser theodolite 6 at least reaches the sum of the lengths of the pipes, the heights of the light target 10 and the laser theodolite 6 from the ground at least reach the radius of the pipes, and the light emitted by the laser theodolite 6 is just positioned at the center of the light target 10;

and the jig frame 11 is arranged at the lower side of each pipe and is used for supporting the pipes and adjusting the position and the height of each pipe so as to enable the light emitted by the laser theodolite 6 to pass through the through hole in the middle of each perforated circular plate 4 and fall on the center of the light target 10 in the welding process.

Therefore, the utility model discloses can be at the adjustable frock of preparation to arrange it approximately behind 1 both ends cross-section department of pipe and monitor and adjust the axiality of welding process according to following mode.

1) The center of each tube, i.e., the line connecting the center positions of each end surface of each tube, is determined. This may be achieved in the manner shown in fig. 1, where the adjustable tooling may be provided on either end face of the pipe, for example the a-a face in fig. 2: firstly, respectively abutting the right-angled end of a ruler 5 with a right angle against two positions on the edge of the inner wall of the pipe; then, two diameters corresponding to the ruler 5 arranged at different positions are obtained through intersection points of two right-angle sides of the ruler 5 and the edge of the inner wall of the pipe respectively, so that the intersection point of the two diameters can be confirmed to be the position of the circle center corresponding to the end face of the pipe; and then, directly or indirectly fixing the first ends of at least 3 turnbuckles 2 on the end surface of the inner wall of the pipe, connecting the second end of each turnbuckle 2 in the step 201 to the same perforated circular plate 4 through a thin steel wire 3, fixing the turnbuckles to the perforated circular plate 4, keeping the connection relationship of the two ends of each turnbuckle 2 unchanged, and adjusting the three turnbuckles to ensure that the through hole of the perforated circular plate 4 is exactly at the center of the circle. In the welding process, each thin steel wire 3 is stressed to pull the circular plate 4 with holes which is connected with the end part together to maintain the position of the circle center, so that whether the coaxiality requirement is met can be judged by comparing the light emitted by the laser theodolite 6.

2) The laser theodolite 6 and the light target 10 are arranged according to fig. 2. With the leveling of laser theodolite, make light target 10 distance laser theodolite 6 reaches the total of the length of each pipe at least, light target 10 and 6 highly reach apart from ground of laser theodolite the radius of pipe keeps the light that 6 laser theodolite jetted out is located just in the center of light target 10.

3) According to fig. 2, the pipes to be assembled are arranged, including a first pipe 7 to be welded, a second pipe 8 to be welded, and a third pipe 9 to be welded, (3 pipes are taken as an example in this figure, the method is not limited by the number of pipes), each pipe is arranged on a jig frame 11, the jig frames 11 and the pipes arranged thereon are arranged between the light target 10 and the laser theodolite 6, and the laser beam on the light target 10 is shielded.

4) The position and height of the jig frame 11 are adjusted until the laser beam passes through all the perforated circular plates 4 and reappears on the light target 10.

5) And (5) positioning assembly is completed, and welding is carried out. During the welding process, attention is paid to observing the positions of the laser beam and the center of the circle of the pipe, and the positions of the respective jig frames 11 and the respective pipes provided thereon in the fifth step are maintained to adjust the welding sequence. During the welding process, special attention should be paid to adjust the position and height of the jig frame 11 to maintain the light emitted by the laser theodolite 6 to always pass through the through hole in the middle of each perforated circular plate 4 and fall on the center of the light target 10.

6) And (4) after cooling, checking, and checking only by observing the position of the laser beam. That is, it is checked whether the light emitted from the laser theodolite 6 passes through the through hole in the middle of each perforated circular plate 4 and falls on the center of the light target 10; if the light is shielded by any circular plate 4 with holes, the coaxiality of the pipe is judged not to reach the standard, and welding needs to be adjusted again; otherwise, judging that the coaxiality of the pipe reaches the standard.

In the multi-tube coaxial assembly welding device, the diameter of the through hole in the middle of the perforated circular plate 4 can be selected to be not more than 0.1mm, so as to realize the coaxiality requirement of 0.1 mm. The sizes of the thin steel wires 3 connected with the wire are the same as the sizes of the turn buckle 2 connected with the wire; in each adjustable tool, the angle between the thin steel wires 3 and the angle between the turnbuckles 2 can be set to be 120 degrees.

Claims

1. A multi-tube coaxial assembly welding apparatus, comprising:

the adjustable tool is arranged on each end face of each pipe to be welded, a circular plate with holes (4) is arranged in the center of the adjustable tool, and through holes in the middle of the circular plate with holes (4) are respectively arranged at the circle center positions of the arranged end faces;

the laser theodolite (6) is arranged outside the outermost end face of the outermost pipe to be welded and used for emitting light to the other end of the pipe;

the laser theodolite welding device comprises a light target (10), a laser theodolite (6), a laser theodolite and a laser theodolite, wherein the light target (10) is arranged outside the end face of the other side of a pipe to be welded, the distance between the light target (10) and the laser theodolite (6) at least reaches the sum of the lengths of the pipes, the heights of the light target (10) and the laser theodolite (6) from the ground at least reach the radius of the pipe, and light emitted by the laser theodolite (6) is just positioned at the center of the light target (;

and the jig frame (11) is arranged at the lower side of each pipe and is used for supporting the pipes and adjusting the position and the height of each pipe so as to enable the light emitted by the laser theodolite (6) to pass through the through hole in the middle of each circular plate with the hole (4) and fall at the center of the light target (10) in the welding process.

2. The multi-tube coaxial assembly welding apparatus of claim 1, wherein said adjustable tooling comprises:

the number of the turnbuckles (2) is at least 3, and the first end of each turnbuckle (2) is directly or indirectly fixed on the end surface of the inner wall of the pipe;

a thin steel wire (3) connected between the other end of the turnbuckle (2) and the perforated circular plate (4) for fixing the perforated circular plate (4);

the middle of the circular plate with the hole (4) is provided with a through hole for light emitted by the laser theodolite (6) to pass through.

3. A multi-tube coaxial assembly welding set according to claim 2, characterized in that the through hole in the middle of the holed circular plate (4) has a diameter not exceeding 0.1 mm.

4. A multi-tube coaxial assembly welding device according to claim 3, characterized in that said thin steel wires (3) and said turnbuckles (2) connected thereto are of the same size;

in each adjustable tool, the angles between the thin steel wires (3) and the angles between the turnbuckles (2) are 120 degrees.