In-line pipe coupling device and method

Abstract

The application provides a pipeline inner butt joint device and method, and belongs to the technical field of pipeline welding, which comprises a rotating shaft, a first expansion joint and a second expansion joint are arranged on the rotating shaft, the first expansion joint and the second expansion joint are symmetrically arranged on both sides of a welding joint group, and the first expansion joint and the second expansion joint are coaxially arranged with the welding joint group; the first expansion joint comprises a guide rail wheel, a plurality of guide rail blades are fixedly connected to the outer side of the guide rail wheel, the outer side surface of the guide rail blade is arc-shaped, a sliding track is formed in the outer side surface of the guide rail blade, and a lifting shaft is slidably connected in the sliding track. The pipeline inner butt joint device and method improve the precision and speed of the pipeline welding joint group, reduce the labor cost, and improve the construction efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of pipeline welding, and particularly relates to a pipeline inner alignment device and method. BACKGROUND

[0002] With the development of large-scale petrochemical plant, the welding of pipeline becomes the main technical point of the construction of chemical plant, and a large amount of financial and material resources are invested. In the process of pipeline welding joint alignment and welding, the pipeline welding joint alignment is one of the important links in the process of grasping the quality of pipeline welding. How to ensure the gap and the accuracy of the broken joint of the pipeline alignment before welding to meet the welding requirements is the main problem at present.

[0003] At present, the welding joint alignment of the pipeline mostly relies on the use of measuring tools by the pipe worker, and the alignment is performed by cooperating with the chain or the crane. It is difficult to ensure the quality and accuracy of the pipeline alignment, and it is more difficult to ensure the quality of the pipeline welding. SUMMARY

[0004] In view of the defects or deficiencies in the prior art, the present application provides a pipeline inner alignment device and method, which improves the accuracy and speed of the pipeline welding joint alignment, reduces the labor cost, and improves the construction efficiency.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] In a first aspect, the embodiments of the present application provide a pipeline inner alignment device, comprising a rotating shaft, a first expansion joint and a second expansion joint are arranged on the rotating shaft, the first expansion joint and the second expansion joint are symmetrically arranged on both sides of the welding joint alignment, and the first expansion joint and the second expansion joint are coaxially arranged with the welding joint alignment.

[0007] The first expansion joint comprises a guide rail wheel, a plurality of guide rail blades are fixedly connected to the outer side of the guide rail wheel, the outer side surface of the guide rail blade is arc-shaped, and a sliding track is formed in the outer side surface of the guide rail blade, and a lifting shaft is slidably connected in the sliding track.

[0008] Further, a gear shaft is fixedly connected to the rotating shaft, a gear is arranged on the inner side of the guide rail wheel and matched with the outer ring gear of the gear shaft, and the gear shaft and the guide rail wheel are connected through gear transmission.

[0009] Further, the first expansion joint further comprises a support circle, the support circle is a cylindrical structure, hollow inside, sleeved on the rotating shaft, and the guide rail wheel and the guide rail impeller are located inside the support circle.

[0010] Further, the support circle axis is connected with the rotating shaft through a fixed shaft, a sliding bearing is arranged in the fixed shaft, the outer side surface of the sliding bearing is connected with the support circle, and the inner side surface of the sliding bearing is connected with the rotating shaft.

[0011] Further, the support circle outer side surface is provided with a lifting hole corresponding to the position of the lifting shaft, and the lifting shaft is penetrated through the lifting hole.

[0012] Further, a limit stopper is arranged at the lifting hole to limit the lifting movement of the lifting shaft.

[0013] Further, the lifting shaft is provided with a jacking steel plate at one end away from the guide vane, the jacking steel plate is an arc-shaped steel plate matched with the inner wall of the pipeline, and a sealing rubber is arranged on the outer surface of the jacking steel plate.

[0014] Further, the rotating shaft is provided with a manual locking device at one end, and the rotating shaft is driven to rotate through the manual locking device.

[0015] Further, a support ring is arranged between the manual locking device and the first expansion joint, the support ring comprises a support frame and a roller, and a plurality of support frames and rollers are arranged, and the support frame and the roller are threadedly connected.

[0016] In the second aspect, the embodiments of the present application provide a pipeline inner alignment method, which utilizes the pipeline inner alignment device as described above, and comprises the following steps.

[0017] Firstly, the manual locking device is used to drive the support ring and the two expansion joints to move towards the inside of the pipeline, and stop at the position of the weld joint group, so that the distance between the weld joint group and the expansion joints on both sides is uniform.

[0018] Then, the manual locking device is rotated, the guide wheel and the guide vane are driven to rotate through the rotating shaft, the lifting shaft is slid along the sliding guide rail of the outer edge of the guide vane, the jacking steel plate at the end of the lifting shaft is moved to the inner wall of the pipeline to extrude the sealing rubber, under the coaxial and concentric action of the first expansion joint and the second expansion joint, the inner walls of the pipelines on both sides of the weld joint group are kept concentric, there is no misalignment, the manual locking device is locked to prevent the shaft from rotating, and the pipeline weld joint group alignment accuracy is ensured.

[0019] After the weld joint group alignment is completed, the manual locking device is unlocked, the expansion joints move towards the center of the circle, the support ring drives the two expansion joints to move outward, and the two expansion joints are separated from the pipeline.

[0020] Compared with the prior art, the present application has the following advantages:

[0021] 1. The first expansion joint and the second expansion joint are arranged on both sides of the weld joint group, which provides quick alignment for the weld joint group and improves the weld joint group alignment accuracy, and the support ring, the first expansion joint and the second expansion joint are coaxially arranged, which can quickly realize the concentricity and coaxiality of the pipelines on both sides of the weld joint group, so that there is no misalignment of the inner walls of the pipelines, and the welding quality of the weld joint is improved.

[0022] 2、The present application is provided with guide vane and lifting shaft, so that the lifting shaft moves up and down along the sliding rail of the outer edge of the guide vane, the size of the expansion joint can be adjusted, it is suitable for different pipe diameters, simple and convenient, easy to operate, the sealing rubber does not damage the inside of the pipeline during the operation of the expansion joint, does not pollute the pipeline carburizing, no noise pollution, good safety performance. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the whole structure schematic view of the mouth device in the embodiment one of the present application;

[0024] Figure 2 It is the first expansion joint side structure schematic view in the embodiment one of the present application;

[0025] Wherein, 1, rotating shaft;2, gear shaft;3, shaft pin;4, guide wheel;5, guide vane;6, lifting shaft;7, support circle;8, fixed shaft;9, limiter;10, jacking steel plate;11, pipeline;12, sealing rubber;13, locking nut;14, limiting block;15, sleeve;16, manual locking device;17, support frame;18, roller. DETAILED DESCRIPTION

[0026] The present application is further described below in conjunction with the drawings and examples.

[0027] Embodiment one

[0028] A typical embodiment of the present application, as shown in Figure 1 A pipeline inner mouth device and method, comprising rotating shaft 1, rotating shaft 1 is provided with first expansion joint and second expansion joint, first expansion joint and second expansion joint are respectively located on both sides of the weld, first expansion joint and second expansion joint are coaxially arranged with the weld.

[0029] The first expansion joint and the second expansion joint are the same structure, wherein, as shown in Figure 2 The first expansion joint comprises gear shaft 2, gear shaft 2 is fixed on rotating shaft 1 through shaft pin 3, the outer side of gear shaft 2 is provided with guide wheel 4, the inner side of guide wheel 4 is provided with gear matched with the outer ring gear of gear shaft 2, gear transmission is formed between guide wheel 4 and gear shaft 2, so that guide wheel 4 is driven to rotate by gear shaft 2.

[0030] The outer side of guide wheel 4 is provided with a plurality of guide vanes 5, the outer side of guide vane 5 is arc-shaped, guide vane 5 is provided with four, which are symmetrically distributed on the outer circumferential surface of guide wheel 4, sliding rail is formed on the outer side of guide vane 5, lifting shaft 6 is slidably connected in the sliding rail, when guide vane 5 rotates with guide wheel 4, lifting shaft 6 can slide along the outer side of guide vane 5 by using the sliding rail, so as to realize the lifting movement of lifting shaft 6.

[0031] The first expansion joint further comprises a supporting circle 7, which is a cylindrical structure, hollow inside, sleeved on the rotating shaft 1, the guide rail wheel 4 and the guide rail impeller 5 are located inside the supporting circle 7, the axis of the supporting circle 7 is connected with the rotating shaft 1 through a fixed shaft 8, the fixed shaft 8 is provided with a sliding bearing inside, the outer side of the sliding bearing is connected with the supporting circle 7, and the inner side of the sliding bearing is connected with the rotating shaft 1; when the rotating shaft 1 rotates, the supporting circle 7 does not rotate with the rotating shaft 1 and supports the expansion joint.

[0032] The outer side of the supporting circle 7 is provided with a lifting hole at a position corresponding to the lifting shaft 6, one end of the lifting shaft 6 away from the guide rail impeller 5 penetrates through the lifting hole, and the lifting hole is provided with a limit stop 9, which limits the lifting movement of the lifting shaft 6.

[0033] One end of the lifting shaft 6 away from the guide rail impeller 5 is provided with a jacking steel plate 10, which is an arc-shaped steel plate matched with the inner wall of the pipeline 11, and the outer surface of the jacking steel plate 10 is provided with a sealing rubber 12, thereby playing a buffering role.

[0034] Lock nuts 13 are arranged on both sides of the supporting circle 7, the expansion joint is fastened and locked through the lock nuts 13, and the axial movement of the expansion joint along the rotating shaft 1 is prevented.

[0035] A limiting block 14 is arranged between the supporting circle 7 and the guide rail wheel 4, the supporting circle 7 and the guide rail wheel 4 are separated through the limiting block 14, so that the rotation of the guide rail wheel 4 does not affect the supporting circle 7, and meanwhile the limiting block 14 can limit the axial movement of the guide rail wheel 4 along the rotating shaft 1, thereby limiting the guide rail wheel 4.

[0036] A sleeve 15 is arranged between the first expansion joint and the second expansion joint, which can support and adjust the distance between the first expansion joint and the second expansion joint.

[0037] A manual locking device 16 is arranged at one end of the rotating shaft 1, the rotating shaft 1 can be driven to rotate through the manual locking device 16, and the manual locking device 16 has a locking function and can lock the rotating shaft 1.

[0038] A supporting ring is arranged between the manual locking device 16 and the first expansion joint, the supporting ring comprises a supporting frame 17 and a plurality of rollers 18, the supporting frame 17 and the rollers 18 are threadedly connected, a plurality of supporting frames 17 and rollers 18 are symmetrically arranged, the distance between the rollers 18 and the rotating shaft 1 can be adjusted through bolts, so that the rollers 18 can be in contact with the inner wall of the pipeline 11 with different diameters, thereby supporting and adjusting the alignment device.

[0039] Embodiment two

[0040] The embodiment discloses a pipeline alignment method in a pipeline, which utilizes the pipeline alignment device in the pipeline in the embodiment one, and comprises the following steps:

[0041] First, the first and second expansion and manual locking device and other assemblies on the rotating shaft, the first and second expansion in free state, using a manual locking device to push the support ring with two expansion, to the inside of the pipe movement, to the stop push to the weld group of pairs, so that the weld on both sides and the expansion between the spacing is uniform.

[0042] Start the operation of the manual locking device, rotating shaft with guide rail wheel and guide rail impeller rotation, lifting shaft along the outer edge of the guide rail impeller sliding, lifting shaft in the limit of the limit of the start of the up and down movement, lifting shaft to the pipe wall, the lifting plate to the pipe wall extrusion sealing rubber, under the action of two expansion coaxial concentric, weld on both sides of the pipe wall to keep concentric, there is no wrong, the manual locking device lock shaft not in rotation, to ensure the accuracy of the pipe weld group.

[0043] After the completion of the weld group, the manual locking device is unlocked, the expansion moves to the center direction, the manual unlocking device is dragged outward, the support ring drives the two expansion to move outward, and the pipe is separated.

[0044] The above only for the preferred embodiments of the present application, and not for limiting the present application, for those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A pipe alignment device, characterized in that, Includes a rotating shaft, on which a first expansion joint and a second expansion joint are provided. The first expansion joint and the second expansion joint are symmetrically arranged on both sides of the weld joint assembly, and the first expansion joint and the second expansion joint are coaxially arranged with the weld joint assembly. The first expansion joint includes a guide wheel, and multiple guide blades are fixedly connected to the outer side of the guide wheel. The outer surface of the guide blades is arc-shaped, and a sliding track is opened on the outer surface of the guide blades. A lifting shaft is slidably connected in the sliding track. A gear shaft is fixedly connected to the rotating shaft, and a gear that matches the outer ring gear of the gear shaft is provided on the inner side of the guide wheel. The gear shaft and the guide wheel are connected by gear transmission. A lifting steel plate is provided at the end of the lifting shaft away from the guide rail impeller. The lifting steel plate is an arc-shaped steel plate that fits the inner wall of the pipe. Sealing rubber is provided on the outer surface of the lifting steel plate.

2. The pipe alignment device as described in claim 1, characterized in that, The first expansion joint also includes a support circle, which is a cylindrical structure with a hollow interior, and is fitted onto the rotating shaft. The guide wheel and the guide impeller are both located inside the support circle.

3. The pipe alignment device as described in claim 2, characterized in that, The support circle axis is connected to the rotating shaft via a fixed shaft. A sliding bearing is installed inside the fixed shaft. The outer surface of the sliding bearing is connected to the support circle, and the inner surface of the sliding bearing is connected to the rotating shaft.

4. A pipe alignment device as described in claim 2, characterized in that, A lifting hole is provided on the outer side of the support circle at the position corresponding to the lifting shaft, and the end of the lifting shaft away from the guide rail impeller passes through the lifting hole.

5. A pipe alignment device as described in claim 4, characterized in that, A limiter is installed at the lifting hole to limit the lifting movement of the lifting shaft.

6. The pipe alignment device as described in claim 1, characterized in that, One end of the rotating shaft is equipped with a manual locking device, which drives the rotating shaft to rotate.

7. A pipe alignment device as described in claim 1, characterized in that, A support ring is provided between the manual locking device and the first expansion section. The support ring includes a support frame and rollers. Multiple support frames and rollers are provided. The support frame and rollers are threadedly connected.

8. A method for aligning pipes internally, utilizing a pipe alignment device as described in any one of claims 1-7, characterized in that, Includes the following steps: First, use the manual locking device to push the support ring to drive the two expansion joints into the pipe. Stop when the support ring is pushed to the weld assembly position, so that the distance between the two sides of the weld and the expansion joint is uniform. Then, rotate the manual locking device, using the rotating shaft to drive the guide wheel and guide impeller to rotate. The lifting shaft slides along the sliding guide rail on the outer edge of the guide impeller, causing the lifting steel plate at the end of the lifting shaft to move to the inner wall of the pipe and squeeze the sealing rubber. Under the action of the first expansion section and the second expansion section being coaxial and concentric, the inner walls of the pipe on both sides of the weld remain concentric and there is no misalignment. Lock the shaft with the manual locking device to prevent it from rotating, ensuring the accuracy of the pipe weld assembly. After the weld joints are assembled, unlock the manual locking device. The expansion joint moves towards the center and is pulled outward by the manual unlocking device. The support ring drives the two expansion joints to move outward and detach from the pipe.

Images