An adjustable equal-diameter steel pipe butt welding centering device

Abstract

The application relates to the field of steel pipes and discloses an adjustable butt-weld centering device for equal-diameter steel pipes, which comprises a main cross beam, a straightening beam and a hole-tilting lock nut. One side of the main cross beam is provided with a first herringbone column, and the other side is provided with a second herringbone column. The first herringbone column and the second herringbone column are both composed of two struts. The straightening beam is arranged at the bottom of the struts. Two rope penetrating rings are arranged at the two ends of the straightening beam, and a steel wire rope is penetrated in the rope penetrating rings. A blind hole is arranged at the upper part of the hole-tilting lock nut, and an inclined through hole is arranged at the lower part. One end of the steel wire rope is connected with the blind hole of the hole-tilting lock nut and is fastened by a fixing bolt, and the other end of the steel wire rope is fastened by a fixing bolt after penetrating through the inclined through hole. The application solves the problem that the existing technology cannot guarantee the angle between the steel pipe and the vertical direction when the angle exists.

Description

Technical Field

[0001] This invention relates to the field of steel pipes, and more specifically to an adjustable equal-diameter steel pipe butt welding centering device. Background Technology

[0002] In power plants, water plants, chemical plants, and other factories, piping systems are often complex, requiring high coaxiality. Even slight deviations can affect fluid flow and impact, or even damage, the equipment connected to the piping system. For structural steel pipes subjected to external forces, when the coaxiality of two sections of the pipe is critical, especially when the pipe is at an angle to the vertical, fixing tools, simple tools, or manual methods are insufficient to guarantee this.

[0003] Utility model patent CN202015913U discloses a pipe welding centering device, belonging to the field of pipe welding auxiliary equipment. It includes a workbench with a vertically mounted bracket for fixing flanges. A pipe adjustment mechanism is also mounted on the workbench, and a pipe support and positioning mechanism is mounted on the pipe adjustment mechanism. The pipe support and positioning mechanism uses V-blocks, and the pipe adjustment mechanism uses hydraulic jacks. While this technical solution can provide support during welding, its structure makes it inconvenient to move, and the centering effect cannot be guaranteed. Summary of the Invention

[0004] To address the above problems, the present invention provides an adjustable equal-diameter steel pipe butt welding centering device.

[0005] The specific solution adopted in this invention is as follows: an adjustable equal-diameter steel pipe butt welding centering device, the centering device including a main crossbeam, a straightening beam, and an off-center locking nut, wherein a first herringbone column is provided on one side of the main crossbeam and a second herringbone column is provided on the other side, and both the first and second herringbone columns are composed of two support columns; the straightening beam is provided at the bottom of the support columns, and rope loops are respectively provided at both ends of the straightening beam, through which steel wire ropes pass; the off-center locking nut has a blind hole at the upper part and an inclined through hole at the lower part; one end of the steel wire rope is connected to the blind hole of the off-center locking nut and fastened with a fixing bolt, and the other end passes through the inclined through hole and is fastened with a fixing bolt.

[0006] Both the first and second chevrons consist of two pillars with an included angle of 30°-90°.

[0007] Both the first and second chevrons consist of two pillars with an included angle of 60°.

[0008] The steel wire rope forms a 120° angle with the support.

[0009] The inclined through hole consists of a vertical hole and an inclined hole, and the included angle between the vertical hole and the inclined hole is 150°.

[0010] The first and second chevron columns are symmetrically arranged on both sides of the main beam.

[0011] The support columns inside the first and second chevron columns are connected to the main beam by welding.

[0012] The support columns inside the first and second chevron columns are connected to the straightening beam by welding.

[0013] The present invention has the following advantages over the prior art:

[0014] This invention provides an adjustable equal-diameter steel pipe butt welding centering device. The centering device includes a main crossbeam, a first herringbone column, and a second herringbone column. A straightening beam located below the column and rope loops on both sides of the straightening beam allow a steel wire rope to pass through. The steel wire rope is secured to the circular steel pipe using an off-center locking nut. In this invention, the first and second herringbone columns, together with the steel wire rope, adjust and center the diameter of the steel pipe. The off-center locking nut secures and locks the steel wire rope. This device features a simple structure, lightweight design, convenient assembly and disassembly, and applicability to pipes of various sizes. This invention solves the problem that when high coaxiality is required between two sections of steel pipe, especially when the steel pipe is at an angle to the vertical, it is impossible to guarantee this using fixing tools, simple tools, or manual methods. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a schematic diagram showing the connection between the first herringbone column and the main crossbeam of the present invention;

[0017] Figure 3 for Figure 2 Side view;

[0018] Figure 4 This is a schematic diagram illustrating the operation of the present invention;

[0019] Figure 5 This is a schematic diagram of the off-hole lock nut of the present invention;

[0020] Figure 6 for Figure 5 A schematic diagram of AA.

[0021] The reference numerals in the attached figures are as follows:

[0022] In the diagram, 1. Main crossbeam, 2. Wire rope, 3. Offset hole lock nut, 4. Fixing bolt, 5. Support column, 6. Straightening beam, 7. Rope loop, 8. Blind hole, 9. Inclined through hole, 10. First A-frame post, 11. Second A-frame post, 12. Vertical hole, 13. Inclined hole. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0024] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] This invention provides an adjustable equal-diameter steel pipe butt welding centering device. The centering device includes a main crossbeam 1, a straightening beam 6, and an offset locking nut 3. A first herringbone column 10 is provided on one side of the main crossbeam 1, and a second herringbone column 11 is provided on the other side. Both the first herringbone column 10 and the second herringbone column 11 are composed of two support columns 5. The straightening beam 6 is located at the bottom of the support column 5, and rope loops 7 are respectively provided at both ends of the straightening beam 6. A steel wire rope 2 passes through the rope loops 7. A blind hole 8 is provided at the upper part of the offset locking nut 3, and an inclined through hole 9 is provided at the lower part. One end of the steel wire rope 2 is connected to the blind hole 8 of the offset locking nut 3 and is fastened with a fixing bolt 4. The other end passes through the inclined through hole 9 and is fastened with a fixing bolt 4.

[0026] Both the first A-frame post 10 and the second A-frame post 11 are composed of two support pillars 5 with an included angle of 30°-90°. Both the first A-frame post 10 and the second A-frame post 11 are composed of two support pillars 5 with an included angle of 60°. The steel wire rope 2 forms a 120° angle with the support pillars 5. The inclined through hole 9 is composed of a vertical hole 12 and an inclined hole 13, with the included angle between the vertical hole 12 and the inclined hole 13 being 150°. The first A-frame post 10 and the second A-frame post 11 are symmetrically arranged on both sides of the main crossbeam 1. The support pillars 5 within the first A-frame post 10 and the second A-frame post 11 are connected to the main crossbeam 1 by welding. The support pillars 5 within the first A-frame post 10 and the second A-frame post 11 are connected to the straightening beam 6 by welding.

[0027] In this invention, the main crossbeam, the first A-frame post, the second A-frame post, the straightening beam, and the rope loop together form an adjustable equal-diameter steel pipe butt welding alignment device. The main crossbeam, the first A-frame post, the second A-frame post, and the straightening beam are made of round steel. The main crossbeam primarily secures the first and second A-frame posts and also functions as a handle, facilitating easy access and disassembly for welders working at heights. Each of the first and second A-frame posts contains two supports, preferably at a 60-degree angle. The straightening beam is welded below the supports, and the rope loop is welded to the side of the straightening beam. The rope loop forms a 120-degree angle with the first A-frame post to facilitate smooth passage of the wire rope, prevents sharp angles when tightening the wire rope, and ensures a tight fit with the steel pipe being welded. A deflecting lock nut and a fixing screw together constitute a wire lock nut. The offset lock nut is made of square steel with smooth holes machined on both end faces, one side machined into a blind hole, and the other side machined into an inclined through hole, protruding from the side of the square steel. Two threads are located on the front of the square steel, perpendicular to the two smooth holes, for fixing screws. An arc groove is machined on the back of the square steel to reduce the distance between the wire rope and the pipe to be welded. One end of the wire rope is inserted into the blind hole of the offset lock nut, and the fixing screw secures this end of the wire rope. The other end of the wire rope passes through the rope loop, around the pipe to be welded, and into the inclined through hole of the offset lock nut, and is tightened. The fixing bolt locks this exposed end of the wire rope. The two wire ropes are fixed to the two sections of steel pipe to be welded respectively by a fixing A-frame, completing the coaxiality correction of the two sections of steel pipe.

[0028] Example 1

[0029] This invention provides an adjustable equal-diameter steel pipe butt welding centering device. The centering device includes a main crossbeam 1, a straightening beam 6, and an offset locking nut 3. A first herringbone column 10 is provided on one side of the main crossbeam 1, and a second herringbone column 11 is provided on the other side. Both the first herringbone column 10 and the second herringbone column 11 are composed of two support columns 5. The straightening beam 6 is located at the bottom of the support column 5, and rope loops 7 are respectively provided at both ends of the straightening beam 6. A steel wire rope 2 passes through the rope loops 7. A blind hole 8 is provided at the upper part of the offset locking nut 3, and an inclined through hole 9 is provided at the lower part. One end of the steel wire rope 2 is connected to the blind hole 8 of the offset locking nut 3 and is fastened with a fixing bolt 4. The other end passes through the inclined through hole 9 and is fastened with a fixing bolt 4.

[0030] Both the first A-frame post 10 and the second A-frame post 11 are composed of two support columns 5 with an included angle of 30°. The steel wire rope 2 forms a 120° angle with the support column 5. The inclined through hole 9 is composed of a vertical hole 12 and an inclined hole 13, with the included angle between the vertical hole 12 and the inclined hole 13 being 150°. The first A-frame post 10 and the second A-frame post 11 are symmetrically arranged on both sides of the main crossbeam 1. The support columns 5 in the first A-frame post 10 and the second A-frame post 11 are connected to the main crossbeam 1 by welding. The support columns 5 in the first A-frame post 10 and the second A-frame post 11 are connected to the straightening beam 6 by welding.

[0031] Example 2

[0032] This invention provides an adjustable equal-diameter steel pipe butt welding centering device. The centering device includes a main crossbeam 1, a straightening beam 6, and an offset locking nut 3. A first herringbone column 10 is provided on one side of the main crossbeam 1, and a second herringbone column 11 is provided on the other side. Both the first herringbone column 10 and the second herringbone column 11 are composed of two support columns 5. The straightening beam 6 is located at the bottom of the support column 5, and rope loops 7 are respectively provided at both ends of the straightening beam 6. A steel wire rope 2 passes through the rope loops 7. A blind hole 8 is provided at the upper part of the offset locking nut 3, and an inclined through hole 9 is provided at the lower part. One end of the steel wire rope 2 is connected to the blind hole 8 of the offset locking nut 3 and is fastened with a fixing bolt 4. The other end passes through the inclined through hole 9 and is fastened with a fixing bolt 4.

[0033] Both the first A-frame post 10 and the second A-frame post 11 are composed of two support columns 5 with an included angle of 60°. The steel wire rope 2 forms a 120° angle with the support column 5. The inclined through hole 9 is composed of a vertical hole 12 and an inclined hole 13, with an included angle of 150° between the vertical hole 12 and the inclined hole 13. The first A-frame post 10 and the second A-frame post 11 are symmetrically arranged on both sides of the main crossbeam 1. The support columns 5 in the first A-frame post 10 and the second A-frame post 11 are connected to the main crossbeam 1 by welding. The support columns 5 in the first A-frame post 10 and the second A-frame post 11 are connected to the straightening beam 6 by welding.

[0034] Example 3

[0035] This invention provides an adjustable equal-diameter steel pipe butt welding centering device. The centering device includes a main crossbeam 1, a straightening beam 6, and an offset locking nut 3. A first herringbone column 10 is provided on one side of the main crossbeam 1, and a second herringbone column 11 is provided on the other side. Both the first herringbone column 10 and the second herringbone column 11 are composed of two support columns 5. The straightening beam 6 is located at the bottom of the support column 5, and rope loops 7 are respectively provided at both ends of the straightening beam 6. A steel wire rope 2 passes through the rope loops 7. A blind hole 8 is provided at the upper part of the offset locking nut 3, and an inclined through hole 9 is provided at the lower part. One end of the steel wire rope 2 is connected to the blind hole 8 of the offset locking nut 3 and is fastened with a fixing bolt 4. The other end passes through the inclined through hole 9 and is fastened with a fixing bolt 4.

[0036] Both the first A-frame post 10 and the second A-frame post 11 are composed of two support columns 5 with an included angle of 90°. The steel wire rope 2 forms a 120° angle with the support column 5. The inclined through hole 9 is composed of a vertical hole 12 and an inclined hole 13, with the included angle between the vertical hole 12 and the inclined hole 13 being 150°. The first A-frame post 10 and the second A-frame post 11 are symmetrically arranged on both sides of the main crossbeam 1. The support columns 5 in the first A-frame post 10 and the second A-frame post 11 are connected to the main crossbeam 1 by welding. The support columns 5 in the first A-frame post 10 and the second A-frame post 11 are connected to the straightening beam 6 by welding.

[0037] In this invention, the steel wire rope is a flexible steel wire rope. When the steel wire rope is long enough, this invention can be applied to butt welding of various pipe diameters. It has the characteristics of simple structure, light weight, convenient disassembly and assembly, and easy movement.

[0038] The above figures and explanations are only one specific embodiment of the present invention, but the specific protection scope of the present invention is not limited to the above explanations. Any simple substitution or modification within the scope of the technical concept disclosed in the present invention, and the technical solution of the present invention, should be within the protection scope of the present invention.

Claims

1. An adjustable butt-weld aligning device for equal diameter steel pipe butt welding, characterized by, The centering device comprises a main crossbeam (1), a straightening beam (6), a hole-tilt lock nut (3), one side of the main crossbeam (1) is provided with a first A-frame (10), the other side is provided with a second A-frame (11), the first A-frame (10) and the second A-frame (11) are both composed of two struts (5); the straightening beam (6) is arranged at the bottom of the strut (5), both ends of the straightening beam (6) are respectively provided with a rope passing ring (7), the steel wire rope (2) passes through the rope passing ring (7); the hole-tilt lock nut (3) is provided with a blind hole (8) at the upper part and an inclined through hole (9) at the lower part; one end of the steel wire rope (2) is connected with the blind hole (8) of the hole-tilt lock nut (3) and is fastened by a fixing bolt (4), the other end passes through the inclined through hole (9) and is fastened by a fixing bolt (4).

2. The adjustable butt-weld pipe alignment device of claim 1, wherein, The first A-frame (10) and the second A-frame (11) are both composed of two struts (5) with an included angle of 30°-90°.

3. The adjustable butt-weld pipe alignment device of claim 2, wherein, The first A-frame (10) and the second A-frame (11) are both composed of two struts (5) with an included angle of 60°.

4. The adjustable butt-weld pipe alignment device of claim 3, wherein, The steel wire rope (2) and the strut (5) form an angle of 120°.

5. The adjustable butt-weld pipe alignment device of claim 4, wherein, The inclined through hole (9) is composed of a vertical hole (12) and an inclined hole (13), the included angle between the vertical hole (12) and the inclined hole (13) is 150°.

6. The adjustable butt-weld pipe alignment device of claim 5, wherein, The first A-frame (10) and the second A-frame (11) are symmetrically arranged on both sides of the main crossbeam (1).

7. The adjustable butt-weld pipe alignment device of any one of claims 1-6, wherein, The connection mode between the struts (5) in the first A-frame (10) and the second A-frame (11) and the main crossbeam (1) is welding.

8. The adjustable butt-weld pipe alignment device of claim 7, wherein, The connection mode between the struts (5) in the first A-frame (10) and the second A-frame (11) and the straightening beam (6) is welding.

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