Pipeline welding assembly centering device and using method thereof

Abstract

The invention discloses a pipeline welding assembly centering device and a using method thereof. The pipeline welding assembly centering device comprises a front-end telescopic shaft, an outer sleeve, a front-end connecting block, a rear-end telescopic shaft, a rear-end connecting block, a front-end connecting rod mechanism and a rear-end connecting rod mechanism. An axial inner unthreaded hole is formed in the outer sleeve, and the outer sleeve is assembled on the outer surface of the front-end telescopic shaft; the front end connecting block is fixed on the front end telescopic shaft; an external thread is arranged on the outer surface of the rear-end telescopic shaft, and the rear-end telescopic shaft is arranged in the internal thread of the front-end telescopic shaft; the rear end connecting block is fixed on the inner side of the rear end telescopic shaft; the front-end connecting rod mechanism and the rear-end connecting rod mechanism are both assembled on the outer surface of the front-end telescopic shaft; the front-end telescopic shaft, the outer sleeve, the front-end connecting block, the rear-end telescopic shaft, the rear-end connecting block, the front-end connecting rod mechanism and the rear-end connecting rod mechanism are coaxially arranged. According to the invention, rapid centering between different pipe diameters can be realized.

Description

Technical Field

[0001] The invention relates to an auxiliary tooling for butt welding of pipelines and pipelines or pipes and flanges in the field of mechanical manufacturing, and more specifically, to a pipeline welding assembly centering device and a use method thereof. Background Art

[0002] Generally speaking, the butt welding between pipes or between pipes and flanges has the following situations: the outer diameter is consistent but the inner hole is inconsistent; the outer diameter is inconsistent but the inner hole is consistent; the outer diameter and inner diameter are consistent; there is a large and small head connection between the pipes. Based on the above situations, in order to make the centers of the two pipes consistent and the welds not eccentric, most of the actual production currently relies only on the shape positioning to achieve the consistency of the pipe centers, and the tooling is cumbersome and the operation is complicated. Even the existing inner hole positioning method has the problem of complex operation and poor positioning rigidity. Summary of the invention

[0003] In view of the defects existing in the prior art, the purpose of the present invention is to provide a pipeline welding assembly centering device and a method of using the same, which can achieve rapid centering between pipes of different diameters and has strong rigidity.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A first aspect of the present invention provides a pipeline welding assembly centering device, comprising a front telescopic shaft, an outer sleeve, a front connecting block, a rear telescopic shaft, a rear connecting block, a front connecting rod mechanism and a rear connecting rod mechanism;

[0006] The outer surface of the front telescopic shaft is provided with an external thread, and an axial inner light hole is also formed thereon;

[0007] An axial inner light hole is formed on the outer sleeve, and the outer sleeve is assembled on the outer surface of the front telescopic shaft;

[0008] The front end connecting block is fixed on the front end telescopic shaft;

[0009] The outer surface of the rear telescopic shaft is provided with an external thread, and the rear telescopic shaft is arranged in the inner light hole of the front telescopic shaft;

[0010] The rear end connecting block is fixed on the inner side of the rear end telescopic shaft;

[0011] The front end connecting rod mechanism and the rear end connecting rod mechanism are both mounted on the outer surface of the front end telescopic shaft;

[0012] One side of the front end connecting rod mechanism is movably connected to the inner side of the outer sleeve, and the other side of the front end connecting rod mechanism is movably connected to one side of the front end connecting block;

[0013] One side of the rear end connecting rod mechanism is movably connected to the other side of the front end connecting block, and the other side of the rear end connecting rod mechanism is movably connected to the rear end connecting block;

[0014] The front end telescopic shaft, the outer sleeve, the front end connecting block, the rear end telescopic shaft, the rear end connecting block, the front end connecting rod mechanism and the rear end connecting rod mechanism are arranged as coaxial axes.

[0015] Preferably, a handle is connected to the outer side of the outer sleeve;

[0016] A gasket is provided at the connection between the handle and the outer sleeve.

[0017] Preferably, a handle is connected to the outer side of the rear telescopic shaft;

[0018] A gasket is provided at the connection between the handle and the rear end telescopic shaft.

[0019] Preferably, the front end connecting rod mechanism is provided with multiple sets, each set includes a front end round head connecting rod, a front end square connecting rod and a front end return spring;

[0020] The front end round-head connecting rods are provided with two, which are arranged crosswise and connected by a pin in the middle;

[0021] The lower ends of the two front end round head connecting rods are movably connected to the inner side of the outer sleeve and one side of the front end connecting block through pins;

[0022] The front end square connecting rod is provided with one;

[0023] The upper ends of the two front round-head connecting rods are movably connected to the two ends of the front square connecting rod through pins;

[0024] The pin hole on either end of the front square connecting rod is set as a waist-shaped hole;

[0025] The front end return spring is sleeved on the outer surface of the front end telescopic shaft;

[0026] The two ends of the front end return spring are in contact with the outer sleeve and the front end connecting block respectively.

[0027] Preferably, the rear end connecting rod mechanism is provided with multiple sets, each set includes a rear end round head connecting rod, a rear end square connecting rod and a rear end return spring;

[0028] The rear end round-head connecting rods are provided with two, which are cross-arranged and connected by a pin in the middle;

[0029] The lower ends of the two rear end round-head connecting rods are movably connected to the other side of the front end connecting block and the rear end connecting block through pins;

[0030] The rear end square connecting rod is provided with one;

[0031] The upper ends of the two rear round-head connecting rods are movably connected to the two ends of the rear square connecting rod through pins;

[0032] The pin hole on either end of the rear end square connecting rod is set as a waist-shaped hole;

[0033] The rear end return spring is sleeved on the outer surface of the front end telescopic shaft;

[0034] Both ends of the rear end return spring are in contact with the front end connecting block and the rear end connecting block respectively.

[0035] The second aspect of the present invention provides a method for using the pipeline welding assembly centering device provided in the first aspect of the present invention, comprising the following steps:

[0036] S1, prepare two round pipes to be welded, or a round pipe and a flange;

[0037] S2, respectively sleeve two round tubes, or a round tube and a flange onto the front-end connecting rod mechanism and the rear-end connecting rod mechanism;

[0038] S3, rotating the handle to drive the outer sleeve to expand the front connecting rod mechanism to support the round pipe / flange, and then rotating the handle to drive the rear telescopic shaft to expand the rear connecting rod mechanism to support the round pipe / flange;

[0039] S4, after welding is completed, the handle and the grip are rotated in reverse to shrink the front-end connecting rod mechanism and the rear-end connecting rod mechanism, and the pipeline welding assembly centering device is pulled out.

[0040] The present invention provides a pipeline welding assembly centering device and a method for using the same. The front-end connecting rod mechanism and the rear-end connecting rod mechanism can be independently adjusted to expand and contract by respective handles or grips, so that the device can be used for centering different pipe diameters, and the operation is simpler and faster. The front-end connecting rod mechanism and the rear-end connecting rod mechanism are positioned by multiple sets of supports, and are linearly positioned, so the positioning area is larger and the positioning rigidity is more sufficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of the pipeline welding assembly centering device of the present invention;

[0042] Figure 2 Schematic diagram of the working principle of the pipeline welding assembly centering device of the present invention, (a) is the expansion of the front end connecting rod mechanism, (b) is the contraction of the front end connecting rod mechanism, (c) is the expansion of the rear end connecting rod mechanism, and (d) is the contraction of the rear end connecting rod mechanism;

[0043] Figure 3The present invention is a schematic diagram of the method of using the pipeline welding assembly centering device, (a) is the insertion of the pipeline welding assembly centering device, (b) is the deployment of the front end connecting rod mechanism, (c) is the deployment of the rear end connecting rod mechanism, and (d) is the withdrawal of the pipeline welding assembly centering device. DETAILED DESCRIPTION

[0044] In order to better understand the above technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0045] Combination Figure 1 As shown, a pipeline welding assembly centering device provided by the present invention includes a front end telescopic shaft 1, an outer sleeve 2, a front end connecting block 3, a rear end telescopic shaft 4, a rear end connecting block 5, a front end connecting rod mechanism 6 and a rear end connecting rod mechanism 7.

[0046] The front telescopic shaft 1 is arranged horizontally, and an external thread is arranged on its outer surface, and an axial inner light hole is also opened at the center position of the circle.

[0047] An axial inner light hole is formed on the outer sleeve 2, and the outer sleeve 2 is assembled on the outer surface of the front telescopic shaft 1 at a position close to the left side through the inner light hole.

[0048] The front end connecting block 3 is fixed on the front end telescopic shaft 1 at a position close to the right side.

[0049] The outer surface of the rear telescopic shaft 4 is provided with an external thread, and the rear telescopic shaft 4 is assembled in the inner thread of the front telescopic shaft 1 .

[0050] The rear end connecting block 5 is fixed on the inner side (right side) of the rear end telescopic shaft 4 .

[0051] The front end connecting rod mechanism 6 and the rear end connecting rod mechanism 7 are both assembled on the outer surface of the front end telescopic shaft 1 .

[0052] One side (left side) of the front end connecting rod mechanism 6 is movably connected to the inner side (right side) of the outer sleeve 2, and the other side (right side) of the front end connecting rod mechanism 6 is movably connected to one side (left side) of the front end connecting block 3.

[0053] One side (left side) of the rear end connecting rod mechanism 7 is movably connected to the other side (right side) of the front end connecting block 3 , and the other side (right side) of the rear end connecting rod mechanism 7 is movably connected to the rear end connecting block 5 .

[0054] Among them, the front end telescopic shaft 1, the outer sleeve 2, the front end connecting block 3, the rear end telescopic shaft 4, the rear end connecting block 5, the front end connecting rod mechanism 6 and the rear end connecting rod mechanism 7 are arranged as coaxial axes.

[0055] A handle 8 is connected to the outer side (left side) of the outer sleeve 2.

[0056] A gasket 9 is provided at the connection between the handle 8 and the outer sleeve 2 .

[0057] A handle 10 is connected to the outer side (left side) of the rear end telescopic shaft 4 .

[0058] A gasket 11 is provided at the connection between the handle 10 and the rear telescopic shaft 4 .

[0059] The front end connecting rod mechanism 6 is provided with four sets, which are evenly arranged around the circumference of the front end telescopic shaft 1, and each set includes a front end round head connecting rod 601, a front end square connecting rod 602 and a front end return spring 603.

[0060] There are two front round-head connecting rods 601 , which are cross-arranged, and the middle position where the two front round-head connecting rods 601 intersect is movably connected through a pin shaft 604 .

[0061] The lower ends of the two front round-head connecting rods 601 are movably connected to the inner side (right side) of the outer sleeve 2 and one side (left side) of the front connecting block 3 through the pin 605.

[0062] A front square connecting rod 602 is provided and arranged horizontally.

[0063] The upper ends of the two front round-head connecting rods 601 are movably connected to the two ends of the front square connecting rod 602 through the pin shaft 606.

[0064] The pin hole on either end of the front square connecting rod 601 for movably connecting with the front round head connecting rod 601 is set as a waist-shaped hole.

[0065] The front end return spring 603 is sleeved on the outer surface of the front end telescopic shaft 1 .

[0066] The two ends of the front return spring 603 are in contact with the outer sleeve 2 (right side) and the front connecting block 3 (left side) respectively.

[0067] The rear end connecting rod mechanism 7 is provided with four sets, which are evenly arranged around the circumference of the front end telescopic shaft 1, and each set includes a rear end round head connecting rod 701, a rear end square connecting rod 702 and a rear end return spring 703.

[0068] There are two rear end round head connecting rods 701, which are cross-arranged, and the middle position where the two rear end round head connecting rods 701 intersect is movably connected through a pin shaft 704.

[0069] The lower ends of the two rear end round-head connecting rods 701 are movably connected to the other side (right side) of the front end connecting block 3 and the rear end connecting block 5 through the pin shaft 705.

[0070] A rear square connecting rod 702 is provided, which is arranged horizontally.

[0071] The upper ends of the two rear round-head connecting rods 701 are movably connected to the two ends of the rear square connecting rod 702 through the pin shaft 706.

[0072] The pin hole on either end of the rear end square connecting rod for movably connecting with the rear end round head connecting rod 701 is set as a waist-shaped hole.

[0073] The rear return spring 703 is sleeved on the outer surface of the front telescopic shaft 1 .

[0074] The two ends of the rear end return spring 703 are in contact with the front end connecting block 3 (right side) and the rear end connecting block 5 respectively.

[0075] Combination Figure 2 As shown, the working principle of the pipeline welding assembly centering device of the present invention is as follows:

[0076] 1) Rotate the handle 8 to expand / contract the front link mechanism 6. When the handle 8 is rotated to move forward, the outer sleeve 2 is pushed forward (to the right) along the front telescopic axis 1, so that the front link mechanism 6 is expanded to achieve the effect of expansion. Figure 2 When the handle 8 is rotated in the opposite direction, the outer sleeve 2 will move backward (to the left) along the front telescopic shaft 1. At this time, the front return spring 603 that is squeezed will rebound and push the related parts backward. At this time, the front connecting rod mechanism 6 will automatically shrink. Figure 2 (b).

[0077] 2) Rotate the handle 10, and the rear connecting rod mechanism 7 can be expanded / contracted. When the handle 10 is rotated, the rear telescopic shaft 4 moves backward (to the left) along the internal threaded hole of the front telescopic shaft 1, which will drive the rear connecting block 5 to move backward (to the left), so that the rear connecting rod mechanism 7 can be expanded to achieve the effect of expansion. Figure 2 (c). When the handle 10 is rotated in the reverse direction, the rear telescopic shaft 4 moves forward (to the right) along the internal threaded hole of the front telescopic shaft 1, and the rear return spring 703 that is squeezed will rebound and push the related parts forward. At this time, the rear connecting rod mechanism 7 automatically contracts. Figure 2 (d).

[0078] Combination Figure 3 As shown, the present invention also provides a method for using the pipeline welding assembly centering device based on the present invention, comprising the following steps:

[0079] S1, prepare two round pipes with grooves to be welded, or a round pipe and a flange (two pieces with the same diameter or different diameters);

[0080] S2, two round tubes, or a round tube and a flange are respectively mounted on the front connecting rod mechanism 6 and the rear connecting rod mechanism 7. Figure 3 (a);

[0081] S3, rotating the handle 8 drives the outer sleeve 2 to expand the front end connecting rod mechanism 6 to support the round pipe / flange, see Figure 3and then rotating the handle 12 to drive the rear end telescopic shaft 4 to expand the rear end linkage mechanism 7, supporting the tube / flange, see Figure 3 (c), at this time, it can ensure that the center of the front and rear end round pipes / flanges are aligned, and at the same time, a suitable welding gap is reserved;

[0082] S4, after the welding is completed, the handle 8 and the handle 12 are rotated in the opposite direction to shrink the front connecting rod mechanism 6 and the rear connecting rod mechanism 7, and the pipeline welding assembly centering device of the present invention is pulled out.

[0083] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A pipeline welding assembly centering device, characterized in that: It includes a front telescopic shaft, an outer sleeve, a front connecting block, a rear telescopic shaft, a rear connecting block, a front connecting rod mechanism and a rear connecting rod mechanism; The outer surface of the front telescopic shaft is provided with an external thread, and an axial inner light hole is also formed thereon; An axial inner light hole is formed on the outer sleeve, and the outer sleeve is assembled on the outer surface of the front telescopic shaft; The front end connecting block is fixed on the front end telescopic shaft; The outer surface of the rear telescopic shaft is provided with an external thread, and the rear telescopic shaft is arranged in the inner thread of the front telescopic shaft; The rear end connecting block is fixed on the inner side of the rear end telescopic shaft; The front end connecting rod mechanism and the rear end connecting rod mechanism are both mounted on the outer surface of the front end telescopic shaft; One side of the front end connecting rod mechanism is movably connected to the inner side of the outer sleeve, and the other side of the front end connecting rod mechanism is movably connected to one side of the front end connecting block; One side of the rear end connecting rod mechanism is movably connected to the other side of the front end connecting block, and the other side of the rear end connecting rod mechanism is movably connected to the rear end connecting block; The front end telescopic shaft, the outer sleeve, the front end connecting block, the rear end telescopic shaft, the rear end connecting block, the front end connecting rod mechanism and the rear end connecting rod mechanism are arranged as coaxial axes.

2. The pipeline welding assembly centering device according to claim 1, characterized in that: The outer side of the outer sleeve is connected with a handle; A gasket is provided at the connection between the handle and the outer sleeve.

3. The pipeline welding assembly centering device according to claim 1, characterized in that: A handle is connected to the outer side of the rear end telescopic shaft; A gasket is provided at the connection between the handle and the rear end telescopic shaft.

4. The pipeline welding assembly centering device according to claim 1, characterized in that: The front end connecting rod mechanism is provided with multiple sets, each set includes a front end round head connecting rod, a front end square connecting rod and a front end return spring; The front end round-head connecting rods are provided with two, which are arranged crosswise and connected by a pin in the middle; The lower ends of the two front end round head connecting rods are movably connected to the inner side of the outer sleeve and one side of the front end connecting block through pins; The front end square connecting rod is provided with one; The upper ends of the two front round-head connecting rods are movably connected to the two ends of the front square connecting rod through pins; The pin hole on either end of the front square connecting rod is set as a waist-shaped hole; The front end return spring is sleeved on the outer surface of the front end telescopic shaft; The two ends of the front end return spring are in contact with the outer sleeve and the front end connecting block respectively.

5. The pipeline welding assembly centering device according to claim 1, characterized in that: The rear end connecting rod mechanism is provided with multiple sets, each set includes a rear end round head connecting rod, a rear end square connecting rod and a rear end return spring; The rear end round-head connecting rods are provided with two, which are cross-arranged and connected by a pin in the middle; The lower ends of the two rear end round-head connecting rods are movably connected to the other side of the front end connecting block and the rear end connecting block through pins; The rear end square connecting rod is provided with one; The upper ends of the two rear round-head connecting rods are movably connected to the two ends of the rear square connecting rod through pins; The pin hole on either end of the rear end square connecting rod is set as a waist-shaped hole; The rear end return spring is sleeved on the outer surface of the front end telescopic shaft; Both ends of the rear end return spring are in contact with the front end connecting block and the rear end connecting block respectively.

6. A method for using the pipeline welding assembly centering device according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1, prepare two round pipes to be welded, or a round pipe and a flange; S2, respectively sleeve two round tubes, or a round tube and a flange onto the front-end connecting rod mechanism and the rear-end connecting rod mechanism; S3, rotating the handle to drive the outer sleeve to expand the front connecting rod mechanism to support the round pipe / flange, and then rotating the handle to drive the rear telescopic shaft to expand the rear connecting rod mechanism to support the round pipe / flange; S4, after welding is completed, the handle and the grip are rotated in reverse to shrink the front-end connecting rod mechanism and the rear-end connecting rod mechanism, and the pipeline welding assembly centering device is pulled out.

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