Internal aligning device and method for pipeline

Abstract

The invention provides a pipeline internal aligning device and method, and belongs to the technical field of pipeline welding, the pipeline internal aligning device comprises a rotating shaft, the rotating shaft is provided with a first expansion joint and a second expansion joint, the first expansion joint and the second expansion joint are symmetrically arranged on the two sides of a welded junction pair, and the first expansion joint and the second expansion joint are coaxially arranged with the welded junction pair; 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 faces of the guide rail blades are arc-shaped, sliding rails are formed in the outer side faces of the guide rail blades, and lifting shafts are slidably connected into the sliding rails. According to the pipeline internal aligning device and method, the pipeline welded junction assembling precision is improved, the pipeline welded junction assembling speed is increased, the labor cost is reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline welding, and in particular relates to a pipeline internal butt joint device and method. Background Art

[0002] With the development of large-scale petrochemical plants, pipeline welding has become the main technical point in the construction of chemical plants, and the financial and material resources invested are relatively large. In the process of pipeline weld matching and welding, pipeline weld matching is one of the important links in the process of grasping the quality of pipeline welding. How to ensure the gap and gap accuracy of the pipeline joints before welding to quickly meet the welding requirements is the main problem at present.

[0003] At present, the alignment of pipeline welds is mostly done by pipefitters using measuring tools in conjunction with fall chains or cranes. This makes it difficult to ensure the quality and accuracy of pipeline alignment, let alone the quality of pipeline welding. Summary of the invention

[0004] In view of the defects or shortcomings in the prior art, the present invention provides a device and method for matching pipe joints, which improves the accuracy and speed of pipe weld matching, reduces labor costs, and improves construction efficiency.

[0005] To achieve the above object, the present invention adopts the following technical solution: In a first aspect, an embodiment of the present invention provides a pipe internal joint device, comprising a rotating shaft, on which a first expansion joint and a second expansion joint are arranged, the first expansion joint and the second expansion joint are symmetrically arranged on both sides of a weld joint pair, and the first expansion joint and the second expansion joint are coaxially arranged with the weld joint pair; The first expansion joint comprises a guide wheel, a plurality of guide blades are fixedly connected to the outer side of the guide wheel, the outer side of the guide blade is arc-shaped, and a sliding track is provided on the outer side of the guide blade, and a lifting shaft is slidably connected in the sliding track.

[0006] Furthermore, a gear shaft is fixedly connected to the rotating shaft, a gear matched with the outer ring gear of the gear shaft is arranged on the inner side of the guide wheel, and the gear shaft and the guide wheel are connected through gear transmission.

[0007] Furthermore, the first expansion joint also includes a support circle, which is a cylindrical structure with a hollow interior and is sleeved on the rotating shaft. The guide wheel and the guide impeller are both located inside the support circle.

[0008] Furthermore, the axis of the support circle is connected to the rotating shaft via a fixed shaft, a sliding bearing is arranged in the fixed shaft, the outer side of the sliding bearing is connected to the support circle, and the inner side of the sliding bearing is connected to the rotating shaft.

[0009] Furthermore, a lifting hole is provided on the outer side surface of the support circle at a position corresponding to the lifting shaft, and one end of the lifting shaft away from the guide rail impeller passes through the lifting hole.

[0010] Furthermore, a limiter is arranged at the lifting hole to limit the lifting movement of the lifting shaft.

[0011] Furthermore, a lifting steel plate is provided at one end of the lifting shaft away from the guide rail impeller. The lifting steel plate is an arc-shaped steel plate that is adapted to the inner wall of the pipeline. A sealing rubber is provided on the outer surface of the lifting steel plate.

[0012] Furthermore, a manual locking device is provided at one end of the rotating shaft, and the rotating shaft is driven to rotate by the manual locking device.

[0013] Furthermore, a support ring is arranged between the manual locking device and the first expansion joint, and the support ring includes a support frame and a roller. The support frame and the roller are both provided with a plurality of them, and the support frame is threadedly connected with the roller.

[0014] In a second aspect, an embodiment of the present invention provides a method for aligning a pipe in a pipeline, using the above-mentioned aligning device in a pipeline, comprising the following steps: First, use the manual locking device to push the support ring to drive the two expansion joints to move inside the pipe, and stop when they are pushed to the position of the weld joint pair, so that the distance between the two sides of the weld and the expansion joint is uniform; Then rotate the manual locking device, use the rotating shaft to drive the guide wheel and the guide impeller to rotate, and the lifting shaft slides along the sliding guide rail on the outer edge of the guide impeller, so that the lifting steel plate at the end of the lifting shaft moves to the inner wall of the pipe to squeeze the sealing rubber. Under the coaxial and concentric action of the first expansion joint and the second expansion joint, the inner walls of the pipes on both sides of the weld remain concentric without misalignment. The manual locking device locks the shaft and stops it from rotating, ensuring the accuracy of the pipe weld assembly; After the weld joint is assembled, the manual locking device is unlocked, the expansion joint moves toward the center of the circle, the manual unlocking device is dragged outward, and the support ring drives the two expansion joints to move outward and detach from the pipeline.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a first expansion joint and a second expansion joint on both sides of the weld joint pair, which provides a quick centering for the weld joint pairing and improves the weld joint pairing accuracy. At the same time, the support ring and the first expansion joint and the second expansion joint are coaxially arranged, which can quickly achieve the concentricity and coaxiality of the pipes on both sides when the weld joint is paired, so that there is no misalignment on the inner wall of the pipe, thereby improving the welding quality of the weld joint.

[0016] 2. The present invention sets a guide rail impeller and a lifting shaft so that the lifting shaft moves up and down along the sliding guide rail on the outer edge of the guide rail impeller, thereby adjusting the size of the expansion joint and being suitable for different pipe diameters. The invention is simple, convenient and easy to operate. The sealing rubber does not damage the inside of the pipeline during the expansion joint operation, does not pollute the pipeline carburization, does not cause noise pollution, and has good safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the docking device in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the side structure of the first expansion joint in the first embodiment of the present invention; Among them, 1. rotating shaft; 2. gear shaft; 3. shaft pin; 4. guide wheel; 5. guide impeller; 6. lifting shaft; 7. support circle; 8. fixed shaft; 9. limiter; 10. lifting steel plate; 11. pipeline; 12. sealing rubber; 13. locking nut; 14. limit block; 15. sleeve; 16. manual locking device; 17. support frame; 18. roller. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Embodiment 1 A typical implementation of the present invention is as follows Figure 1 As shown, a device and method for matching ports in a pipeline include a rotating shaft 1, on which a first expansion joint and a second expansion joint are arranged. The first expansion joint and the second expansion joint are respectively located on both sides of the weld, and the first expansion joint and the second expansion joint are both coaxially arranged with the weld port.

[0020] The first expansion joint has the same structure as the second expansion joint, wherein, Figure 2 As shown, the first expansion joint includes a gear shaft 2, which is fixed to the rotating shaft 1 by an axle pin 3. A guide wheel 4 is sleeved on the outer side of the gear shaft 2, and a gear matched with the outer ring gear of the gear shaft 2 is arranged on the inner side of the guide wheel 4. A gear transmission is formed between the guide wheel 4 and the gear shaft 2, thereby driving the guide wheel 4 to rotate through the gear shaft 2.

[0021] A plurality of guide rail impellers 5 are arranged on the outside of the guide rail wheel 4. The outer side surface of the guide rail impeller 5 is arc-shaped. There are four guide rail impellers 5, which are symmetrically distributed on the outer circumferential surface of the guide rail wheel 4. A sliding track is opened on the outer side surface of the guide rail impeller 5. A lifting shaft 6 is slidably connected in the sliding track. When the guide rail impeller 5 rotates with the guide wheel 4, the lifting shaft 6 can slide along the outer side surface of the guide rail impeller 5 by using the sliding track, thereby realizing the lifting movement of the lifting shaft 6.

[0022] The first expansion joint also includes a support circle 7, which is a cylindrical structure with a hollow interior and is sleeved on the rotating shaft 1. The guide wheel 4 and the guide impeller 5 are both located inside the support circle 7. The axis of the support circle 7 is connected to the rotating shaft 1 through a fixed shaft 8. A sliding bearing is arranged in the fixed shaft 8. The outer side surface of the sliding bearing is connected to the support circle 7, and the inner side surface of the sliding bearing is connected to the rotating shaft 1. When the rotating shaft 1 rotates, the support circle 7 does not rotate with the rotating shaft 1, and plays a supporting role for the expansion joint.

[0023] A lifting hole is provided at the position corresponding to the outer side of the support circle 7 and the lifting shaft 6. The end of the lifting shaft 6 away from the guide rail impeller 5 passes through the lifting hole. A limiter 9 is provided at the lifting hole to limit the lifting movement of the lifting shaft 6.

[0024] A lifting steel plate 10 is arranged at one end of the lifting shaft 6 away from the guide rail impeller 5. The lifting steel plate 10 is an arc-shaped steel plate, which is matched with the inner wall of the pipeline 11. A sealing rubber 12 is arranged on the outer surface of the lifting steel plate 10 to play a buffering role.

[0025] Locking nuts 13 are provided on both sides of the support circle 7 , and the expansion joint is tightened and locked by the locking nuts 13 to prevent the expansion joint from moving along the axial direction of the rotating shaft 1 .

[0026] A limit block 14 is provided between the support circle 7 and the guide wheel 4, and the support circle 7 and the guide wheel 4 are separated by the limit block 14 so that the support circle 7 is not affected when the guide wheel 4 rotates. At the same time, the limit block 14 can limit the axial movement of the guide wheel 4 along the rotating shaft 1, thereby limiting the guide wheel 4.

[0027] A sleeve 15 is provided between the first expansion joint and the second expansion joint, and the sleeve 15 can support the first expansion joint and the second expansion joint and adjust the distance therebetween.

[0028] A manual locking device 16 is provided at one end of the rotating shaft 1 , and the rotating shaft 1 can be driven to rotate by the manual locking device 16 . The manual locking device 16 has a locking function and can lock the rotating shaft 1 .

[0029] A support ring is arranged between the manual locking device 16 and the first expansion joint, and the support ring includes a support frame 17 and a roller 18. The support frame 17 and the roller 18 are threadedly connected. There are multiple support frames 17 and rollers 18, and they are symmetrically arranged. The distance between the roller 18 and the rotating shaft 1 can be adjusted by bolts, so that the roller 18 can contact the inner wall of the pipe 11 with different diameters, thereby supporting and adjusting the matching device.

[0030] Embodiment 2 This embodiment discloses a method for aligning a pipe in a pipeline, using a device for aligning a pipe in a pipeline as described in the first embodiment, including the following steps: First, assemble the first expansion joint, the second expansion joint and the manual locking device on the rotating shaft. When the first expansion joint and the second expansion joint are in a free state, use the manual locking device to push the support ring to drive the two expansion joints to move inside the pipe, and stop when they are pushed to the position of the weld assembly, so that the spacing between the two sides of the weld and the expansion joint is uniform.

[0031] Start to operate the manual locking device, the rotating shaft drives the guide wheel and the guide impeller to rotate, the lifting shaft slides along the outer edge guide of the guide impeller, and the lifting shaft starts to move up and down under the restriction of the limiter. The lifting shaft extends to the inner wall of the pipe, and moves the jacking steel plate to the inner wall of the pipe to extrude the sealing rubber. Under the coaxial and concentric action of the two expansion joints, the inner walls of the pipes on both sides of the weld remain concentric without misalignment. The manual locking device locks the shaft so that it no longer rotates, thereby ensuring the accuracy of the pipe weld assembly.

[0032] After the weld joint is assembled, the manual locking device is unlocked, the expansion joint moves toward the center of the circle, the manual unlocking device is dragged outward, and the support ring drives the two expansion joints to move outward and detach from the pipeline.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pipe connection device, characterized in that: It comprises a rotating shaft, on which a first expansion joint and a second expansion joint are arranged, the first expansion joint and the second expansion joint are symmetrically arranged on both sides of the weld joint pair, and the first expansion joint and the second expansion joint are coaxially arranged with the weld joint pair; The first expansion joint comprises a guide wheel, a plurality of guide blades are fixedly connected to the outer side of the guide wheel, the outer side of the guide blade is arc-shaped, and a sliding track is provided on the outer side of the guide blade, and a lifting shaft is slidably connected in the sliding track.

2. A pipe connection device according to claim 1, characterized in that: A gear shaft is fixedly connected to the rotating shaft, a gear matched with the outer ring gear of the gear shaft is arranged on the inner side of the guide wheel, and the gear shaft and the guide wheel are connected through gear transmission.

3. A pipe connection device as claimed in claim 1, characterized in that: The first expansion joint further comprises a support circle, which is a cylindrical structure with a hollow interior and is sleeved on the rotating shaft. The guide wheel and the guide impeller are both located inside the support circle.

4. A pipe connection device as claimed in claim 3, characterized in that: The axis of the support circle is connected to 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 to the support circle, and the inner side surface of the sliding bearing is connected to the rotating shaft.

5. The in-pipe connection device according to claim 3, characterized in that: A lifting hole is provided at a position corresponding to the lifting shaft on the outer side surface of the support circle, and one end of the lifting shaft away from the guide rail impeller passes through the lifting hole.

6. A pipe connection device as claimed in claim 5, characterized in that: A limiter is arranged at the lifting hole to limit the lifting movement of the lifting shaft.

7. The in-pipe connection device according to claim 1, characterized in that: A lifting steel plate is arranged at one end of the lifting shaft away from the guide rail impeller. The lifting steel plate is an arc-shaped steel plate, which is matched with the inner wall of the pipeline. A sealing rubber is arranged on the outer surface of the lifting steel plate.

8. The in-pipe connection device according to claim 1, characterized in that: A manual locking device is provided at one end of the rotating shaft, and the rotating shaft is driven to rotate by the manual locking device.

9. The in-pipe connection device according to claim 1, characterized in that: A support ring is arranged between the manual locking device and the first expansion joint, and the support ring comprises a support frame and a roller. The support frame and the roller are both provided with a plurality of them, and the support frame is threadedly connected with the roller.

10. A method for aligning a pipe in a pipe, using a device for aligning a pipe in a pipe according to any one of claims 1 to 9, characterized in that: The following steps are involved: First, use the manual locking device to push the support ring to drive the two expansion joints to move inside the pipe, and stop when they are pushed to the position of the weld joint pair, so that the distance between the two sides of the weld and the expansion joint is uniform; Then rotate the manual locking device, use the rotating shaft to drive the guide wheel and the guide impeller to rotate, and the lifting shaft slides along the sliding guide rail on the outer edge of the guide impeller, so that the lifting steel plate at the end of the lifting shaft moves to the inner wall of the pipe to squeeze the sealing rubber. Under the coaxial and concentric action of the first expansion joint and the second expansion joint, the inner walls of the pipes on both sides of the weld remain concentric without misalignment. The manual locking device locks the shaft and stops it from rotating, ensuring the accuracy of the pipe weld assembly; After the weld joint is assembled, the manual locking device is unlocked, the expansion joint moves toward the center of the circle, the manual unlocking device is dragged outward, and the support ring drives the two expansion joints to move outward and detach from the pipeline.

Images