Labyrinth compressor piping method

Abstract

The invention relates to the technical field of compressor pipeline installation, in particular to a maze compressor piping method which comprises the following steps that S1, a set of pipeline connecting structures are installed on a flange of a compressor and a flange of equipment correspondingly; s2, the butt joint pipes on the two sets of pipeline connecting structures are preliminarily fixed through an axis alignment device; s3, enabling the axes of the two butt joint pipes to be collinear through a fine adjustment piece on the axis alignment device; s4, the total length of the middle connecting pipe and the size of a welding chamfer needing to be machined are measured; s5, the middle connecting pipe with the corresponding size is machined, and the axis alignment device is disassembled; s6, the middle connecting pipe is installed between the two butt joint pipes, and the axis alignment device is installed again; s7, surfacing is conducted on the connecting position of the middle connecting pipe and the butt joint pipe; and S8, dismounting the axis alignment device. The method has the effects of reducing the piping difficulty and improving the pipeline safety performance.

Description

Technical Field

[0001] This application relates to the field of compressor piping installation technology, and in particular to a method for piping a labyrinth compressor. Background Technology

[0002] A compressor is a driven fluid machinery device that raises low-pressure gas to high-pressure gas. It is widely used in the petrochemical industry for the recovery and processing of propylene gas. However, the compressor is only one of the core equipment for gas processing in the petrochemical industry, and the installation quality of its pipeline system directly affects the overall operating efficiency and safety performance of the equipment.

[0003] Currently, the commonly used pipeline installation methods in the industry mainly include direct welding and flange connection. However, direct welding and flange connection have the following problems: First, using ordinary welding to connect pipelines can easily produce welding impurities during the welding process. These impurities can easily enter the interior of equipment such as compressors along the welded pipeline, and they are difficult to remove. Therefore, the welding impurities can easily damage equipment such as compressors. Secondly, flange connections are used. Flange connections require extremely high precision in the dimensions of the pipes. During the flange connection process, the symmetry and perpendicularity requirements of the flanges must be met. However, in actual pipeline connections, due to installation accuracy errors between different equipment in the construction site and the measurement of flange positions on different equipment, it is difficult to guarantee the symmetry and perpendicularity requirements of the flanges at the ends of the subsequently processed connecting pipes. As a result, high stress can easily be generated at the flange connection. This high stress at the flange may lead to pipeline leakage during equipment operation, which is a drawback. Summary of the Invention

[0004] To address the problems associated with traditional installation pipelines, this application provides a piping method for a labyrinth compressor.

[0005] The labyrinth compressor piping method provided in this application adopts the following technical solution: A method for piping a labyrinth compressor includes the following steps: S1. Install a set of pipe connection structures on both the compressor flange and the equipment flange; S2. Initially fix the butt joints on the two sets of pipe connection structures using the axis alignment device; S3. Use the fine-tuning parts on the axis alignment device to make the axes of the two butt joints collinear; S4. Measure the total length of the intermediate connecting pipe and the required welding chamfer dimensions; S5. Machin the intermediate connecting pipe to the corresponding dimensions and disassemble the axis alignment device; S6. Install the intermediate connecting pipe between the two butt joints and reinstall the axis alignment device; S7. Perform overlay welding on the connection between the intermediate connecting pipe and the butt joints; S8. Remove the axis alignment device.

[0006] By adopting the above technical solution, the two sets of pipe connection structures are first installed on the flanges of the compressor and the equipment, respectively. Then, the two connecting pipes are initially fixed using an axis alignment device. The axes of the two connecting pipes are collinear using the fine-tuning parts on the axis alignment device. The total length of the intermediate connecting pipe to be processed and the welding chamfer size are then measured, and the intermediate connecting pipe of the corresponding size is processed. Subsequently, the intermediate connecting pipe is installed on the two connecting pipes, and the axis alignment device is installed again. At the same time, the axis alignment is adjusted again using the fine-tuning parts. Finally, the intermediate connecting pipe and the connecting pipes are welded, and the axis alignment device is removed. The welded pipes can be disassembled through the flange, which greatly reduces the impact of welding impurities on the equipment. At the same time, it greatly reduces the installation difficulty of pipes between different equipment and reduces the possibility of high stress at the flange connection, which is conducive to improving the overall equipment operation safety and construction difficulty.

[0007] Optionally, S1 includes the following steps: S11, fastening a conveying pipe to both the flange of the compressor and the flange of the equipment, and ensuring that the ends of the two conveying pipes are at a suitable mating distance; S12, welding a flange of the corresponding size to one set of pipe connection structures according to the flange size at the end of the conveying pipe corresponding to the compressor; S13, welding a flange of the corresponding size to another set of pipe connection structures according to the flange size at the end of the conveying pipe corresponding to the equipment; S14, installing one set of pipe connection structures on the flange of the conveying pipe corresponding to the compressor, and installing the other set of pipe connection structures on the flange of the conveying pipe corresponding to the equipment.

[0008] By adopting the above technical solution, the two conveying pipelines between the two devices greatly reduce the difficulty of connecting pipelines between devices over long distances. At the same time, the conveying pipelines can standardize the flange dimensions installed on the pipeline connection structure, which helps to reduce the production cost of the pipeline connection structure.

[0009] Optionally, S2 includes the following steps: S21, unfolding two semi-arc plates on a set of end arc plates on the axis alignment device, fastening the two semi-arc plates on the set of end arc plates onto one of the connecting pipes, and re-fixing the two semi-arc plates with fixing bolts. At the same time, tightening the adjusting screws on the end arc plates and semi-arc plates so that the adjusting screws abut against the connecting pipe; S22, using the same method, fixing the other connecting pipe onto the axis alignment device with the two semi-arc plates on the other set of end arc plates.

[0010] By adopting the above technical solution, the axis alignment device can be adapted to connecting pipes of different diameters. The fixing and disassembly processes are relatively simple and convenient.

[0011] Optionally, S3 includes the following steps: S31, installing a vernier on the sliding block of the axis alignment device, and under the elastic force of the central compression spring, the sliding blocks at both ends of the central compression spring drive the vernier to abut against the end of the connecting pipe; S32, turning the adjusting screws on the end arc plate and the semi-arc plate so that the scale graduations corresponding to multiple verniers on the same side of the end of the connecting pipe are the same, thereby completing the collinearity fine adjustment process of the two connecting pipe axes; S33, measuring the distance between the ends of the two connecting pipes through the scale graduations corresponding to the verniers.

[0012] By adopting the above technical solution, after the vernier is installed on the sliding block, the central compression spring will push the sliding blocks at both ends of the vernier in opposite directions, so that the vernier can abut against the end of the connecting pipe. The worker will observe the scale scale corresponding to multiple verniers on the same end of the connecting pipe and turn the adjusting screw to make the scale scale corresponding to multiple verniers on the same end of the connecting pipe gradually the same, so as to make the axes of the two connecting pipes collinear.

[0013] Optionally, S4 includes the following steps: S41, turning the approach screw on the axis alignment device, the approach screw pushes the ruler plate close to the connecting pipe until the ruler plate abuts against the outer wall of the connecting pipe; S42, through the abutment gap between the ruler plate and the outer wall of the connecting pipe, turning the adjusting screws on the end arc plate and the semi-arc plate again to fine-tune the two connecting pipes again; S43, through the scale markings on the corresponding two connecting pipes on the ruler plate where the pipe end chamfers are located, and based on the shrinkage of the weld during welding, calculate the total length of the intermediate connecting pipe; S44, through the scale markings on the side of the vernier facing away from the end of the connecting pipe, and the inclination angle of the pipe end chamfer, calculate the welding chamfer size that needs to be processed on the intermediate connecting pipe.

[0014] By adopting the above technical solution, the ruler plate is brought into contact with the outer wall of the connecting pipe by turning the approach screw. The size of the contact gap between the ruler plate and the outer wall of the connecting pipe is then adjusted again by the approach screw to further improve the coaxiality of the two connecting pipes. This improves the measurement accuracy of the total length of the intermediate connecting pipe and the processing accuracy of the welding chamfer on the intermediate connecting pipe.

[0015] Optionally, S6 includes the following steps: S61, simultaneously rotate the two connecting pipes, so that the intermediate connecting pipe is gradually inserted between the two inclined and slowly rotating connecting pipes until the welded chamfer at the end of the intermediate connecting pipe abuts against the pipe end chamfer on the inner side of the connecting pipe end; S62, remove the marker and re-fix the axis alignment device onto the two connecting pipes; S63, tighten the approach screw, so that multiple rulers gradually approach the connecting pipes, and at the same time, tighten the adjusting screws on the end arc plate and the semi-arc plate again until the final ruler abuts against the outer wall of the connecting pipe and the intermediate connecting pipe, thereby completely aligning the axes of the two connecting pipes again; S64, by observing the gap between the ruler and the outer wall of the connecting pipe, tighten the adjusting screw again for fine adjustment, and then tighten the locking screw so that the locking screw abuts against the outer wall of the connecting pipe.

[0016] By adopting the above technical solution, when the intermediate connecting pipe is inserted between the two connecting pipes, the end of the welded chamfer of the intermediate connecting pipe will abut against the inner chamfer of the connecting pipe end, thereby achieving automatic alignment of the two connecting pipes. At the same time, due to the existence of processing errors, the welded chamfer of only one end of the intermediate connecting pipe may abut against the inner chamfer of the connecting pipe end. In this case, the worker can still make fine adjustments to the axis of the two connecting pipes by turning the adjusting screw, which is beneficial to improving the accuracy of the subsequent welding process.

[0017] Optionally, S7 includes the following steps: S71, firstly, perform multiple spot welds to fix the pipe end chamfer on the outer side of the connecting pipe end and the welding chamfer on the intermediate connecting pipe; S72, tighten the approach screw to move the ruler away from the outer side wall of the connecting pipe; S73, perform overlay welding between the welding chamfer on the intermediate connecting pipe and the pipe end chamfer on the outer side of the connecting pipe end.

[0018] By adopting the above technical solution, since the welded chamfered part of the intermediate connecting pipe will abut or be close to the pipe end chamfer on the inner side of the connecting pipe end, the possibility of welding impurities entering the connecting pipe is reduced during the welding process between the pipe end chamfer on the outer side of the connecting pipe end and the welded chamfer of the intermediate connecting pipe, thereby reducing the possibility of damage to the overall equipment.

[0019] Optionally, S8 includes the following steps: S81, measuring the temperature of the weld, and removing the axis alignment device after the weld has completely cooled; S82, performing flaw detection on the weld; S83, after the welding is qualified, performing rust prevention treatment on the weld.

[0020] By adopting the above technical solution, the structural strength of the welded joint is ensured, while the possibility of corrosion at the welded joint is reduced.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. First, install the two sets of pipe connection structures on the flanges of the compressor and the equipment respectively. Then, use the axis alignment device to initially fix the two butt joint pipes. Use the fine adjustment parts on the axis alignment device to make the axes of the two butt joint pipes collinear. Then, measure the total length of the intermediate connecting pipe to be processed and the welding chamfer size, and process the intermediate connecting pipe of the corresponding size. Then, install the intermediate connecting pipe on the two butt joint pipes, and reinstall the axis alignment device. At the same time, use the fine adjustment parts to adjust the axis alignment again. Finally, weld the intermediate connecting pipe and the butt joint pipes and remove the axis alignment device. The welded pipe can be disassembled through the flange, which greatly reduces the impact of welding impurities on the equipment. At the same time, it greatly reduces the installation difficulty of pipes between different equipment and reduces the possibility of high stress at the flange connection, which is conducive to improving the overall equipment operation safety and construction difficulty. 2. After the vernier is installed on the sliding block, the central compression spring will push the sliding blocks at both ends in opposite directions, so that the vernier can abut against the end of the connecting pipe. The worker will observe the scale scale corresponding to multiple verniers on the same end of the connecting pipe and turn the adjusting screw to make the scale scale corresponding to multiple verniers on the same end of the connecting pipe gradually the same, so as to make the axes of the two connecting pipes collinear. 3. When the intermediate connecting pipe is inserted between the two connecting pipes, the welded chamfered end of the intermediate connecting pipe will abut against the inner chamfer of the connecting pipe end, thus achieving automatic alignment of the two connecting pipes. At the same time, due to processing errors, the welded chamfer of only one end of the intermediate connecting pipe may abut against the inner chamfer of the connecting pipe end. In this case, the worker can still fine-tune the axis of the two connecting pipes by turning the adjusting screw, which helps to improve the accuracy of the subsequent welding process. 4. Since the welded chamfer of the intermediate connecting pipe will abut or be close to the inner chamfer of the connecting pipe end, the possibility of welding impurities entering the connecting pipe is reduced during the welding process between the outer chamfer of the connecting pipe end and the welded chamfer of the intermediate connecting pipe, thereby reducing the possibility of damage to the overall equipment. Attached Figure Description

[0022] Figure 1This is a structural schematic diagram of an embodiment of this application.

[0023] Figure 2 This is a cross-sectional view used in the embodiments of this application to illustrate the positional relationship between the intermediate connecting pipe and the two connecting pipes during installation.

[0024] Figure 3 yes Figure 1 Enlarged view of section A.

[0025] Figure 4 This is a cross-sectional view used in the embodiments of this application to illustrate the positional relationship between the connector, vernier, and ruler.

[0026] Figure 5 This is a structural schematic diagram illustrating the axis alignment device in the embodiments of this application.

[0027] Figure 6 This is a cross-sectional view used in the embodiments of this application to illustrate the positional relationship between the intermediate connecting pipe, the connecting pipe and the ruler.

[0028] Explanation of reference numerals in the attached drawings: 1. Conveying pipe; 2. Flange; 3. Pipe connection structure; 30. Base pipe; 31. Butt joint pipe; 32. Ball head; 33. Ball groove; 34. Pipe end chamfer; 35. Pipe ball shell; 36. Anti-detachment ball shell; 37. Sealing gasket; 38. Sealing groove; 39. Sealing ring; 4. Axis alignment device; 41. Main frame rod; 42. End arc plate; 43. Semi-arc plate; 44. Fixing bolt; 45. Adjusting screw; 46. Locking screw; 5. Side frame rod; 6. Ruler plate; 7. Ruler groove; 8. Proximity screw; 9. Scale graduation; 10. Fine adjustment component; 101. Guide post; 102. Sliding block; 103. Central compression spring; 104. Vernier; 105. Anti-loosening bolt; 11. Intermediate connecting pipe; 12. Welding chamfer. Detailed Implementation

[0029] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0030] This application discloses a piping method for a labyrinth compressor.

[0031] A method for piping a labyrinth compressor includes the following steps: S1. Install a set of pipe connection structures on both the compressor flange and the equipment flange. The equipment here refers to equipment connected to the compressor via pipes, such as filters or condensers. First, a delivery pipe is bolted to the flange of the compressor and the flange of the equipment. The delivery pipe can be fixed with a metal bracket, and flanges are welded to both ends of the delivery pipe.

[0032] After the two conveying pipes are bolted and fixed to the compressor and the equipment respectively, the flanges at the ends of the two conveying pipes that are close to each other will be at a suitable mating distance. The flanges at the ends of the two conveying pipes that are close to each other can be the same size, and the flanges can be located at different coordinate points in three-dimensional space.

[0033] Based on the flange size at the end of the conveying pipeline, weld flanges of the corresponding size onto the pipeline connection structure, and install one set of pipeline connection structures onto the flange of the conveying pipeline corresponding to the compressor through the flange, and install another set of pipeline connection structures onto the flange of the conveying pipeline corresponding to the equipment through the flange.

[0034] Reference Figure 1 and Figure 2 The pipe connection structure 3 includes a base pipe 30 and a connecting pipe 31. One end of the connecting pipe 31 is integrally formed with a ball head 32. The ball head 32 is provided with a ball groove 33 that communicates with the inner diameter of the connecting pipe 31. The inner and outer sides of the end of the connecting pipe 31 facing away from the ball head 32 are provided with pipe end chamfers 34.

[0035] Reference Figure 1 and Figure 2 The base pipe 30 has an integrally formed tube shell 35 with an annular cross-section. A flange 2 is welded to the end of the base pipe 30 facing away from the tube shell 35. The flange 2 on the base pipe 30 is used to bolt to the flange 2 on the conveying pipeline 1. An anti-detachment shell 36 with an annular cross-section is bolted to the tube shell 35. A sealing gasket 37 is arranged between the tube shell 35 and the anti-detachment shell 36.

[0036] Reference Figure 1 and Figure 2 The anti-detachment ball shell 36 is fitted onto the ball head 32 by one end of the connecting tube 31. The ball head 32 and the inner wall of the tube ball shell 35 and the inner wall of the anti-detachment ball shell 36 are in rolling contact. Multiple annular sealing grooves 38 are provided on the outer wall of the ball head 32. A rubber sealing ring 39 is embedded in each sealing groove 38. The ball groove 33 is located inside the sealing ring 39. The sealing ring 39 is used to abut against the inner wall of the tube ball shell 35. The sealing ring 39 cannot abut against the inner wall of the anti-detachment ball shell 36.

[0037] S2. Initially fix the connecting pipes on the two sets of pipe connection structures using the axis alignment device. Rotate the two connecting pipes and bring their ends closer together. Unfold the two semi-arc plates on a set of end arc plates on the axis alignment device. Attach the two semi-arc plates to one of the connecting pipes and re-fix the two semi-arc plates with fixing bolts.

[0038] Tighten the adjusting screws on the end arc plate and the semi-arc plate so that the end of the adjusting screw abuts against the outer wall of the connecting pipe, thereby fixing the axis alignment device on the connecting pipe. Then, in the same way, fix the other connecting pipe on the axis alignment device by means of the two semi-arc plates on the other set of end arc plates.

[0039] Reference Figure 3 , Figure 4 and Figure 5 The axis alignment device 4 includes a main frame rod 41. Both ends of the main frame rod 41 in the length direction are welded with an end arc plate 42. Both sides of the end arc plate 42 are rotatably connected with a semi-arc plate 43. The central angle of the end arc plate 42 and the semi-arc plate 43 is 120°.

[0040] Reference Figure 3 , Figure 4 and Figure 5 The two semi-arc plates 43 are fixed together by fixing bolts 44. Adjusting screws 45 and locking screws 46 are bolted to both the end arc plate 42 and the semi-arc plate 43. The adjusting screws 45 and locking screws 46 are used to abut against the outer wall of the connecting pipe 31.

[0041] Reference Figure 3 , Figure 4 and Figure 6 A side frame rod 5 is welded between two semi-arc plates 43 on the same side of the main frame rod 41. The side frame rod 5 has the same structure as the main frame rod 41. A ruler plate 6 is slidably arranged on the main frame rod 41. A ruler groove 7 is opened on the main frame rod 41 for the ruler plate 6 to slide. A proximity screw 8 is threadedly connected to the main frame rod 41. The proximity screw 8 and the ruler plate 6 are rotatably engaged. A scale 9 is engraved on the ruler plate 6 along the length direction of the main frame rod 41.

[0042] Reference Figure 3 and Figure 5 The fine-tuning component 10 on the axis alignment device 4 is used to make the axes of the two connecting pipes 31 collinear. The fine-tuning component 10 includes three guide posts 101. A guide post 101 is fixed next to the main frame rod 41 and the two side frame rods 5. The cross-section of the guide post 101 is polygonal. The end of the guide post 101 corresponding to the main frame rod 41 is welded to the end arc plate 42, and the end of the guide post 101 corresponding to the side frame rod 5 is welded to the semi-arc plate 43.

[0043] Reference Figure 3 and Figure 5 Each end of the guide post 101 is slidably fitted with a sliding block 102. A central compression spring 103 supports the two sliding blocks 102. A vernier 104 is inserted into the sliding block 102. An anti-loosening bolt 105 is threaded onto the sliding block 102. The anti-loosening bolt 105 is used to abut against the vernier 104.

[0044] S3. Using the fine-tuning components on the axis alignment device, make the axes of the two connecting pipes collinear. Move the sliding block between the two ends of the connecting pipe, and then install the vernier on the sliding block. Under the elastic force of the central compression spring, the sliding blocks at both ends of the central compression spring will drive the vernier to abut against the end of the connecting pipe. Repeat the above process to install multiple verniers.

[0045] Tighten the adjusting screws on the end arc plate and the semi-arc plate to make the scale graduations corresponding to the multiple verniers at the end of a single connector the same, thereby completing the collinearity fine adjustment process of the two connector axes. The distance between the ends of the two connectors is measured by the scale graduations corresponding to the verniers.

[0046] S4. Measure the total length of the intermediate connecting pipe and the required welding chamfer dimensions. Turn the approach screw forward, and the approach screw will push the ruler plate closer to the connecting pipe until the ruler plate abuts against the outer wall of the connecting pipe. Then, through the abutment gap between the ruler plate and the outer wall of the connecting pipe, turn the adjusting screws on the end arc plate and the semi-arc plate again to fine-tune the axis alignment of the two connecting pipes.

[0047] By using the scale markings on the two corresponding butt joint pipes on the ruler plate where the pipe end chamfers are located, and calculating the total length of the intermediate connecting pipe based on the shrinkage of the weld during welding, the dimensions of the welding chamfer that needs to be machined on the intermediate connecting pipe are calculated by using the scale markings on the side of the vernier facing away from the butt joint pipe end, and the inclination angle of the pipe end chamfer.

[0048] S5. Machining the intermediate connecting pipe of the corresponding size and disassembling the axis alignment device. Reference Figure 2 and Figure 6 Both ends of the intermediate connecting pipe 11 are provided with welding chamfers 12, and the inclination angle of the welding chamfers 12 is the same as the inclination angle of the pipe end chamfer 34 on the inner side of the connecting pipe 31.

[0049] S6. Install the intermediate connecting pipe between the two connecting pipes, and reinstall the axis alignment device. Simultaneously rotate the two connecting pipes, gradually inserting the middle connecting pipe between the two tilted and slowly rotating connecting pipes (refer to...). Figure 2 ), until the weld chamfer at the end of the intermediate connecting pipe abuts against the chamfer on the inner side of the butt pipe end (refer to...). Figure 6 Remove the buoy and re-secure the axis alignment device to the two connecting pipes.

[0050] Tighten the approach screw to gradually bring the multiple rulers closer to the connecting pipe. At the same time, turn the adjusting screws on the end arc plate and the semi-arc plate again until the final rulers abut against the outer wall of the connecting pipe and the intermediate connecting pipe. In this way, the axes of the two connecting pipes are fully aligned again.

[0051] By observing the gap between the ruler and the outer walls of the two connecting pipes, the adjusting screw is turned again for fine adjustment. Finally, the locking screw is tightened so that it abuts against the outer wall of the connecting pipe, thus completing the final alignment process of the two connecting pipes and the middle connecting pipe.

[0052] S7. Perform weld overlay welding at the connection between the intermediate connecting pipe and the butt pipe. First, perform multiple circumferential spot welds to fix the pipe end chamfer on the outer side of the connector end and the weld chamfer on the middle connecting pipe. Then, turn the approach screw in the opposite direction to move the ruler away from the outer wall of the connector. After that, perform overlay welding at the angle between the weld chamfer on the middle connecting pipe and the pipe end chamfer on the outer side of the connector end.

[0053] S8. Remove the axis alignment device. Measure the temperature of the weld overlay. After the weld overlay has completely cooled, remove the axis alignment device. Then, perform flaw detection on the weld overlay. After the welding is qualified, grind and rust-proof the weld overlay.

[0054] The implementation principle of a labyrinth compressor piping method in this application is as follows: First, a conveying pipe is installed on the compressor and equipment through a flange, so that the ends of the two conveying pipes are close to each other and maintained within a suitable distance range. Then, the base pipe is installed on the conveying pipe through a flange.

[0055] Rotate the connecting pipes on the two base pipes. Due to the multi-angle rotation of the ball head, it becomes possible to connect the two connecting pipes. Open the two semi-arc plates on the end arc plate at one end of the main frame rod, and fix the end arc plate and semi-arc plate at that end of the main frame rod to the connecting pipe by fixing bolts and adjusting screws. Similarly, fix the other connecting pipe.

[0056] Install a vernier on the sliding block, and under the action of the central compression spring, the vernier abuts against the end of the connecting tube. Then, turn multiple adjusting screws to make the scale graduations corresponding to the multiple verniers at the end of the connecting tube the same. Then, turn the approach screw, which pushes the ruler plate closer to the connecting tube until the ruler plate abuts against the outer wall of the connecting tube.

[0057] By adjusting the gap between the ruler and the outer walls of the two connecting pipes, the adjusting screws on the end arc plate and the semi-arc plate are turned again to fine-tune the axis alignment of the two connecting pipes. The total length of the intermediate connecting pipe is calculated by using the scale markings corresponding to the chamfers on the pipe ends of the two connecting pipes.

[0058] By using the scale graduations on the side of the vernier pipe facing away from the end of the connector and the inclination angle of the pipe end chamfer, the dimensions of the welding chamfer that needs to be machined on the intermediate connecting pipe are calculated, and the intermediate connecting pipe is machined according to the measured dimensions. Then the axis alignment device is removed.

[0059] Simultaneously rotate the two connecting pipes, gradually inserting the intermediate connecting pipe between the two inclined and slowly rotating connecting pipes until the welded chamfer at the end of the intermediate connecting pipe abuts against the inner chamfer of the connecting pipe end. At this point, due to processing errors, the end of the intermediate connecting pipe may only abut against the end of one connecting pipe.

[0060] Remove the vernier from the sliding block, then reinstall the axis alignment device. By tightening the approach screw, gradually bring multiple rulers closer to the connecting pipe. At the same time, tighten the adjusting screws on the end arc plate and the semi-arc plate again until the final ruler abuts against the outer wall of the connecting pipe and the intermediate connecting pipe. This completes the alignment adjustment process between the intermediate connecting pipe and the two connecting pipes.

[0061] Perform multiple circumferential spot welds at the angle between the chamfer on the outer side of the connecting pipe end and the weld chamfer on the middle connecting pipe. Then, turn the approach screw in the opposite direction to move the ruler away from the outer wall of the connecting pipe. After that, perform overlay welding at the angle between the weld chamfer on the middle connecting pipe and the chamfer on the outer side of the connecting pipe end. Finally, inspect the weld and remove the axis alignment device.

[0062] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A labyrinth compressor piping method, characterized by, It comprises the following steps: S1, installing a set of pipeline connecting structures on the flanges of the compressor and the equipment; S2, preliminarily fixing the butt pipes on the two sets of pipeline connecting structures through the axis alignment device; S3, making the axes of the two butt pipes collinear through the fine adjustment pieces on the axis alignment device; S4, measuring the total length of the intermediate connecting pipe and the size of the welding chamfer to be processed; S5, processing the intermediate connecting pipe with the corresponding size and disassembling the axis alignment device; S6, installing the intermediate connecting pipe between the two butt pipes and reinstalling the axis alignment device; S7, performing surfacing welding on the connections between the intermediate connecting pipe and the butt pipes; S8, disassembling the axis alignment device.

2. A labyrinth compressor piping method according to claim 1, characterized in that, The S1 comprises the following steps: S11, bolting a delivery pipeline on the flanges of the compressor and the equipment and making the end portions of the two delivery pipelines at a proper butt distance; S12, welding flanges with corresponding sizes on one set of pipeline connecting structures according to the size of the flanges at the end portions of the delivery pipelines corresponding to the compressor; S13, welding flanges with corresponding sizes on the other set of pipeline connecting structures according to the size of the flanges at the end portions of the delivery pipelines corresponding to the equipment; S14, installing one set of pipeline connecting structures on the flanges of the delivery pipelines corresponding to the compressor and installing the other set of pipeline connecting structures on the flanges of the delivery pipelines corresponding to the equipment.

3. A labyrinth compressor piping method according to claim 1, characterized in that, The S2 comprises the following steps: S21, unfolding two half-arc plates on one set of end-arc plates on the axis alignment device, buckling the two half-arc plates on the set of end-arc plates on one butt pipe, and re-fixing the two half-arc plates through fixing bolts, while tightening the adjusting screws on the end-arc plates and the half-arc plates so that the adjusting screws abut against the butt pipe; S22, fixing the other butt pipe on the axis alignment device through two half-arc plates on the other set of end-arc plates in the same way.

4. A labyrinth compressor piping method according to claim 1, wherein The S3 comprises the following steps: S31, installing a vernier on the travel block of the axis alignment device, and under the elastic force of the middle compression spring, the travel blocks at the two ends of the middle compression spring drive the vernier to abut against the end portion of the butt pipe; S32, tightening the adjusting screws on the end-arc plates and the half-arc plates so that the scale graduations corresponding to the multiple verniers on the same side of the end portion of the butt pipe are the same, thereby completing the collinear fine adjustment process of the axes of the two butt pipes; S33, measuring the distance between the end portions of the two butt pipes through the scale graduations corresponding to the verniers.

5. A labyrinth compressor piping method according to claim 1, characterized in that, The S4 comprises the following steps: S41, tightening the approaching screw on the axis alignment device, and the approaching screw pushes the scale plate to approach the butt pipe until the scale plate abuts against the outer sidewall of the butt pipe; S42, again tightening the adjusting screws on the end-arc plates and the half-arc plates to fine adjust the two butt pipes again through the abutment gap between the scale plate and the outer sidewall of the butt pipe; S43, calculating the total length of the intermediate connecting pipe through the scale graduations corresponding to the pipe end chamfers on the two butt pipes on the scale plate and the shrinkage amount of the weld during welding; S44, calculating the size of the welding chamfer to be processed on the intermediate connecting pipe through the scale graduation corresponding to the side of the butt pipe end portion away from the vernier and the inclination angle of the pipe end chamfer.

6. A labyrinth compressor piping method according to claim 1, characterized in that, The S6 comprises the following steps: S61, rotate the two butt pipes at the same time, and gradually insert the intermediate connecting pipe between the two inclined butt pipes which rotate slowly until the welding chamfer at the end of the intermediate connecting pipe abuts on the pipe end chamfer inside the end of the butt pipe; S62, remove the cursor and fix the axis alignment device on the two butt pipes again; S63, tighten the approaching screw, gradually approach the multiple scales to the butt pipe, and again twist the adjusting screw on the end arc plate and the half arc plate until the final scale abuts on the outside wall of the butt pipe and the intermediate connecting pipe, so as to completely align the axis of the two butt pipes again; S64, observe the gap between the scale and the outside wall of the butt pipe, and again twist the adjusting screw for fine adjustment, then tighten the locking screw so that it abuts on the outside wall of the butt pipe.

7. A labyrinth compressor piping method according to claim 1, wherein The S7 comprises the following steps: S71, first perform multiple spot welding between the pipe end chamfer outside the end of the butt pipe and the welding chamfer of the intermediate connecting pipe; S72, twist the approaching screw so that the scale is away from the outside wall of the butt pipe; S73, perform surfacing between the welding chamfer of the intermediate connecting pipe and the pipe end chamfer outside the end of the butt pipe.

8. A labyrinth compressor piping method according to claim 1, characterized in that, The S8 comprises the following steps: S81, measure the temperature of the welding position, and remove the axis alignment device after the welding position is completely cooled; S82, perform flaw detection on the welding position; S83, after the welding is qualified, perform rust-proof treatment on the welding position.

Images