Large-diameter thick-wall steel pipe press straightener and heating straightening method

Abstract

The application relates to the technical field of steel pipe production, and discloses a large-diameter thick-wall steel pipe pressure straightening machine and a heating straightening method, which comprise a base and a steel pipe body, the upper side of the base is sequentially fixed with a controller, a base one and a base two, the lower sides of the two ends of the steel pipe body are respectively arranged on the upper sides of the base one and the base two, the upper side of the base is slidably provided with a jacking base, a moving lifting base, a moving water jet and a medium-frequency induction heater, the outer periphery of the steel pipe body is provided with laser ranging modules, and the base two is provided with a cleaning assembly on one side. The laser ranging modules measure the positions of the outer wall of the steel pipe body which need to be straightened, and transmit data to the controller for processing and analysis; through cooperation of the medium-frequency induction heater and the moving water jet, the straightening of the steel pipe body is realized, and the problem that local concave and oval are easily generated during pressing straightening and affect the straightening effect is avoided.

Description

Technical Field

[0001] This invention relates to the field of steel pipe production technology, specifically to a pressure straightening machine for large-diameter thick-walled steel pipes and a heating straightening method. Background Technology

[0002] Steel pipes are steel materials with hollow cross sections. During use, they are often subjected to radial and axial pressure. Prolonged external force can cause steel pipes to bend and deform. Bending steel pipes will reduce their load-bearing capacity and may even pose safety hazards. Therefore, it is necessary to use a straightening machine to straighten steel pipes regularly.

[0003] Currently, in the straightening of large-diameter thick-walled steel pipes, large pressure straightening machines are typically used to press and straighten the outer wall several times. However, when the straightening pressure is too high, it can cause excessive local curvature in the large-diameter thick-walled pipe, easily resulting in local indentations and ellipses, thus affecting the straightening effect. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a pressure straightening machine for large-diameter thick-walled steel pipes and a heating straightening method, which solves the problem that when the straightening pressure is large, the local curvature of the large-diameter thick-walled pipes becomes too large, easily causing local depressions and ovals, thus affecting the straightening effect.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pressure straightening machine for large-diameter thick-walled steel pipes, comprising a base and a steel pipe body. A controller, a base one, and a base two are sequentially fixed to the upper side of the base. The lower outer walls of both ends of the steel pipe body are respectively disposed on the upper sides of base one and base two. A fixing assembly is installed on the inner wall of one end of the steel pipe body. The fixing assembly includes a connecting rod whose outer wall is attached to the inner wall of one end of the steel pipe body. A jacking base, a movable lifting base, a movable water sprayer, and a medium-frequency induction heater are slidably disposed on the upper side of the base. The jacking base is located on the side of base two away from base one. The other end of the connecting rod slides on the inner wall of the jacking base. The outer wall of the movable lifting base passes through both sides of base two. Laser ranging modules are provided around the outer perimeter of the steel pipe body. A cleaning assembly is installed on one side of base two.

[0006] The above technical solution involves cleaning the outer wall of the steel pipe body using a cleaning component, measuring the position on the outer wall of the steel pipe body that needs to be straightened using a laser ranging module, heating the position on the outer wall of the steel pipe body that needs to be straightened using a medium-frequency induction heater, and then cooling it down using a mobile water sprayer, thereby achieving the straightening of the steel pipe body.

[0007] Preferably, the cleaning assembly includes a ring seat, one side of which is fixed to the side of the second base away from the first base. A ring plate is rotatably connected to the inner side of the ring seat, and a plurality of fixing seats are fixed to the inner side of the ring plate. A scraper is rotatably connected to the sidewall between the two sides of the fixing seats. One side of the scraper is in contact with the outer wall of the steel pipe body, and a spring rod is in contact with the other side of the scraper. One end of the spring rod is fixed to the inner wall of the ring plate.

[0008] Preferably, a plurality of magnetic blocks are fixed on the inner side of the ring plate, a sliding cylinder slides on the outer wall of the magnetic blocks, an electromagnet is fixed on one side of the sliding cylinder, a push rod is fixed on the outer wall of the electromagnet, one end of the push rod slides against one side of the scraper, a spring is fixed between the electromagnet and the side wall of the magnetic blocks, and the outer wall of the electromagnet and the outer wall of the connecting rod are magnetically attracted and attached.

[0009] Preferably, a support ring is fixed on the side of the ring plate away from the base, and a plurality of fan blades are fixed on the inner side of the support ring. The outer wall of the fan blades and the outer wall of the steel pipe body are pre-set with a gap.

[0010] Preferably, a negative pressure machine is fixed on the side of the jacking base near the support ring, and an electric push rod is fixed on one side of the movable lifting base, with the output end of the electric push rod fixedly disposed on the outer wall of the movable lifting base.

[0011] Preferably, a motor is fixed to the other side of the ring seat, and a gear is fixedly provided at the output end of the motor. The tooth end of the gear is meshed with a toothed ring, and the inner side of the toothed ring is fixed to the outer side of the ring plate.

[0012] Preferably, the inner wall of the connecting rod is threaded with a telescopic rod, a connecting pipe is fixed to the side of the connecting rod away from the jacking base, and multiple opening and closing plates are rotatably connected to the side of the connecting pipe away from the connecting rod. A conical block is fixed to one end of the telescopic rod, and the outer wall of the conical block and the outer walls of the multiple opening and closing plates are all in contact.

[0013] Preferably, both base one and base two are rotatably connected to the upper side with rotating rollers and sliding rollers. Base one and base two are rotatably connected to the steel pipe body through rotating rollers, and base one and base two are slidably connected to the steel pipe body through sliding rollers.

[0014] Preferably, a limiting component is installed on the outer wall of the sliding roller on the second base. The limiting component includes a bracket rotatably connected to both sides of the sliding roller. A limiting plate is attached to the lower side of the bracket. A spring is fixed between the limiting plate and the second base. A groove is provided on the upper side of the limiting plate to cooperate with the sliding of the bracket. A push rod is attached to the outer wall of the limiting plate. One end of the push rod is fixed to the outer wall of the base.

[0015] A heating and straightening method for a pressure straightening machine for large-diameter thick-walled steel pipes includes the following steps:

[0016] S1. Connect one end of the steel pipe body to the jacking base through a connecting rod, and place the other end on the upper side of the movable lifting base. By moving the jacking base, the other end of the steel pipe body passes through the ring plate at a certain speed.

[0017] S2. By rotating the ring plate in the forward direction, the scraper rotates on the surface of the steel pipe body to scrape and clean the surface of the steel pipe body. After cleaning, the steel pipe body continues to move through the measurement area formed by multiple laser ranging modules to measure the outer wall of the steel pipe body and transmit the data to the controller for processing and analysis to calculate the position that needs to be straightened, the heating and heat preservation temperature, and the number of straightening times.

[0018] S3. Next, by moving the lifting base, the steel pipe body passes through the heating end of the medium frequency induction heater and its two ends move to the upper side of base one and base two. The controller controls the medium frequency induction heater to move to the position that needs to be straightened, heats it with the preset power, and keeps it warm for a certain period of time.

[0019] S4. Then, the controller controls the electromagnet to adhere to the outer wall of the connecting rod. Through the reverse rotation of the ring plate, the steel pipe body is driven to rotate, and the heating position is rotated to face the moving water sprayer. The moving water sprayer sprays water to the heating position to cool it down and straighten it.

[0020] This invention provides a pressure straightening machine for large-diameter thick-walled steel pipes and a heating straightening method. It has the following beneficial effects:

[0021] 1. This invention pushes the steel pipe body to the upper side of base one and base two by pushing the base. During this process, the outer wall of the steel pipe body is cleaned by the cleaning component, the outer wall of the steel pipe body is measured by the laser ranging module, and the data is transmitted to the controller for processing and analysis. After the area of ​​the outer wall of the steel pipe body that needs to be straightened is heated by the medium frequency induction heater, it is cooled by the moving water sprayer, thereby realizing the straightening of the steel pipe body. This avoids the problem that pressing straightening can easily cause local depressions and ovals, which affect the straightening effect.

[0022] 2. This invention controls the electromagnet and magnetic block to attract the steel pipe through a controller, so that the push rod drives the scraper to move towards the inside of the ring plate, thereby avoiding the problem of interference between the steel pipe body and the scraper when the steel pipe body enters the ring plate, which would lead to a decrease in the efficiency of cleaning and conveying the steel pipe body.

[0023] 3. The present invention uses the forward rotation of the ring plate to drive the scraper to scrape and clean the outer wall of the steel pipe body, thereby realizing the cleaning work before the straightening position measurement of the steel pipe body, avoiding large dirt on the outer wall of the steel pipe body, which would affect the measurement of the laser ranging module.

[0024] 4. This invention controls the electromagnet and connecting rod to attract the steel pipe through a controller, and drives the steel pipe body to rotate through the reverse rotation of the ring plate. This allows the part of the steel pipe body that needs to be cooled and straightened to be rotated to the side covered by the mobile water sprayer, thereby helping to improve the straightening efficiency of the steel pipe body.

[0025] 5. This invention drives the support ring to rotate by the forward rotation of the ring plate, which in turn drives the fan blade to rotate. The dust scraped by the scraper is sucked to the right side of the support ring, avoiding the dust from affecting the measurement of the laser ranging module. This helps to improve the measurement efficiency of the steel pipe body at the position that needs to be straightened. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of a partial structure on the upper side of the base of the present invention;

[0028] Figure 3 This is a schematic diagram of the cleaning component of the present invention;

[0029] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0030] Figure 5 This is a schematic diagram of the exploded structure of the cleaning component of the present invention;

[0031] Figure 6 This is a three-dimensional structural diagram of the cleaning component of the present invention;

[0032] Figure 7 This is a schematic diagram of the upper structure of the base of the present invention;

[0033] Figure 8 This is a schematic diagram of the two-section structure of the base of the present invention.

[0034] The components include: 1. Base; 2. Controller; 3. Tibbing base; 4. Fixing assembly; 40. Telescopic rod; 41. Connecting rod; 42. Connecting pipe; 43. Conical block; 44. Opening and closing plate; 5. Steel pipe body; 6. Movable lifting base; 7. Cleaning assembly; 70. Ring seat; 71. Spring rod; 72. Scraper; 73. Fixing seat; 74. Ring plate; 75. Magnetic block; 76. Slide cylinder; 77. Electromagnet; 78. Push rod one; 79. Spring. 1. Base 1; 8. Mobile water sprayer; 9. Medium frequency induction heater; 10. Base 1; 11. Base 2; 12. Negative pressure unit; 13. Gear ring; 14. Top rod; 15. Laser ranging module; 16. Electric push rod; 17. Support ring; 18. Fan blade; 19. Limiting component; 190. Limiting plate; 191. Bracket; 192. Spring 2; 193. Groove; 20. Motor; 21. Gear; 22. Rotating roller; 23. Sliding roller. Detailed Implementation

[0035] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see the appendix Figure 1 and attached Figure 2 This invention provides a pressure straightening machine for large-diameter thick-walled steel pipes, including a base 1 and a steel pipe body 5. A controller 2, a base one 10, and a base two 11 are fixed sequentially on the upper side of the base 1. The lower outer walls of both ends of the steel pipe body 5 are respectively set on the upper side of the base one 10 and the base two 11. A fixing component 4 is installed on the inner wall of one end of the steel pipe body 5. The fixing component 4 includes a connecting rod 41 whose outer wall is attached to the inner wall of one end of the steel pipe body 5. A jacking base 3, a movable lifting base 6, a movable water sprayer 8, and a medium-frequency induction heater 9 are slidably arranged on the upper side of the base 1. The jacking base 3 is located on the side of the base two 11 away from the base one 10. The other end of the connecting rod 41 slides on the inner wall of the jacking base 3. The outer wall of the movable lifting base 6 passes through both sides of the base two 11. A laser ranging module 15 is arranged around the outside of the steel pipe body 5. A cleaning component 7 is installed on one side of the base two 11.

[0037] In this embodiment, Figure 1The front, back, left, and right are the orientations; the controller 2 can use a PLC programmable controller, a single-chip microcomputer, a microprocessor, or a terminal, etc. The bottom of the jacking base 3, the movable lifting base 6, the movable water sprayer 8, and the medium-frequency induction heater 9 are all fixed with a moving mechanism. The upper side of the base 1 is provided with a track to cooperate with the movement of the above structures. In addition to the moving mechanism, the movable water sprayer 8 also includes a water tank for water storage, a water pump for water pumping, a water pipe for water outlet, and a nozzle. The movable water sprayer 8 and the medium-frequency induction heater 9 are located on the front and back sides of the steel pipe body 5, respectively. All of the above are existing technologies.

[0038] Specifically, during straightening, the right end of the connecting rod 41 is inserted into the inner wall of the left end of the steel pipe body 5, and the left end is inserted into the inner wall of the jacking base 3. The right end of the steel pipe body 5 is placed on the upper side of the movable lifting base 6 to complete the connection and fixation of the steel pipe body 5. The outer wall of the connecting rod 41 and the inner wall of the jacking base 3 are interference fit. The controller 2 controls the jacking base 3 to move to the right, pushing the right end of the steel pipe body 5 into the inner side of the cleaning component 7, so that the cleaning component 7 cleans the outer wall of the steel pipe body 5, avoiding errors in the subsequent measurement of the laser ranging module 15.

[0039] When the right end of the steel pipe body 5 moves above the second base 11 and is located between the first base 10 and the second base 11, the movable lifting base 6 descends, so that the second base 11 supports the steel pipe body 5. The movable lifting base 6 moves to the left and passes through the second base 11, entering between the first base 10 and the second base 11. Then it rises and re-supports the steel pipe body 5. The push base 3 continues to push the steel pipe body 5 to the right and passes through the heating end of the medium frequency induction heater 9. With the cooperation of the movable lifting base 6, the two ends of the steel pipe body 5 fall to the upper side of the first base 10 and the second base 11, thus completing the transportation and cleaning work of the steel pipe body 5 before straightening.

[0040] During this period, four laser ranging modules 15 are located around the outer wall of the steel pipe body 5. They measure the bending position of the outer wall of the steel pipe body 5 as it moves to the right, and transmit the data to the controller 2 for processing and analysis. Then, the controller 2 controls the medium frequency induction heater 9 to move to the position that needs to be straightened, heats it, and keeps it warm for a certain period of time. After that, the power is turned off and the heater is moved out of the area. The water sprayer 8 is then moved to the heating position to spray water to cool it down. This process can be repeated multiple times until the straightening of the steel pipe body 5 is completed. This avoids the problem that pressing and straightening can easily cause local depressions and ovals, which affect the straightening effect.

[0041] Please see the appendix Figure 3 Appendix Figure 5 and attached Figure 6The cleaning component 7 includes a ring seat 70. One side of the ring seat 70 is fixed to the side of the base 2 11 away from the base 1 10. A ring plate 74 is rotatably connected to the inner side of the ring seat 70. A plurality of fixing seats 73 are fixed to the inner side of the ring plate 74. A scraper 72 is rotatably connected to the side wall between the two sides of the fixing seat 73. One side of the scraper 72 is in contact with the outer wall of the steel pipe body 5. A spring rod 71 is in contact with the other side of the scraper 72. One end of the spring rod 71 is fixed to the inner wall of the ring plate 74.

[0042] Specifically, three laser ranging modules 15 are fixed on the right side of the ring seat 70, and the lowest laser ranging module 15 is fixed on the right side of the base 11. When the steel pipe body 5 moves to the right and its right end passes through the ring plate 74, the spring rod 71 always applies force to the scraper 72, so that one edge of the scraper 72 always has force on the outer wall of the steel pipe body 5. When the ring plate 74 rotates in the forward direction, it drives the scraper 72 to scrape and clean the outer wall of the steel pipe body 5, thereby realizing the function of cleaning the outer wall of the steel pipe body 5 before straightening, avoiding large dirt on the outer wall of the steel pipe body 5, which would affect the measurement of the laser ranging module 15.

[0043] Please see the appendix Figure 3 Appendix Figure 5 and attached Figure 6 Multiple magnetic blocks 75 are fixed on the inner side of the ring plate 74. A slide cylinder 76 slides on the outer wall of the magnetic block 75. An electromagnet 77 is fixed on one side of the slide cylinder 76. A push rod 78 is fixed on the outer wall of the electromagnet 77. One end of the push rod 78 slides against one side of the scraper 72. A spring 79 is fixed between the electromagnet 77 and the side wall of the magnetic block 75. The outer wall of the electromagnet 77 and the outer wall of the connecting rod 41 are attached by magnetic attraction.

[0044] Specifically, the connecting rod 41 is made of a magnetically adsorbable material, such as iron. Since the spring rod 71 is always against the scraper 72, when the right end of the steel pipe body 5 just enters the ring plate 74, there is an interference problem between the outer wall of the steel pipe body 5 and the scraper 72. Therefore, before the steel pipe body 5 moves to the right, the controller 2 first controls the electromagnet 77 to be energized, so that the electromagnet 77 and the magnetic block 75 on opposite sides have a mutual magnetic attraction force, thereby making the electromagnet 77 overcome the elastic potential energy of the spring 79 and slide towards the inner side of the ring plate 74. The push rod 78 drives the scraper 72 to overcome the elastic potential energy of the spring rod 71 and rotate towards the inner side of the ring plate 74, thereby expanding the inner diameter of the circle formed by the multiple scrapers 72, which facilitates the passage of the steel pipe body 5 and avoids interference between the steel pipe body 5 and the scraper 72. When the steel pipe body 5 enters the circle formed by the multiple scrapers 72, the controller 2 controls the electromagnet 77 to be de-energized, and the scraper 72 re-fits against the outer wall of the steel pipe body 5. At this time, the ring plate 74 drives the scraper 72 to rotate and clean the outer wall of the steel pipe body 5.

[0045] Since the water spraying angle of the mobile water sprayer 8 is only one side, it cannot spray water to cool the outer wall of the other sides of the steel pipe body 5. Therefore, when the two ends of the steel pipe body 5 move to the upper side of the base 10 and the base 21, the controller 2 controls the electromagnet 77 to be energized, so that it and the magnetic block 75 form a repulsive force. The side of the electromagnet 77 away from the magnetic block 75 will be attracted to the outer wall of the connecting rod 41. When it is necessary to spray water to cool the other sides of the steel pipe body 5, the steel pipe body 5 can be rotated by the reverse rotation of the ring plate 74, so that the position that needs to be cooled faces the side where the mobile water sprayer 8 is located. This allows the mobile water sprayer 8 to spray water to cool the outer wall of the steel pipe body 5 from all directions, thereby improving the efficiency of straightening the steel pipe body 5.

[0046] Please see the appendix Figure 3 A support ring 17 is fixed on the side of the ring plate 74 away from the base 11. Several fan blades 18 are fixed on the inner side of the support ring 17. The outer wall of the fan blades 18 and the outer wall of the steel pipe body 5 are pre-set with a gap.

[0047] Specifically, when the scraper 72 scrapes and cleans the outer wall of the steel pipe body 5, the scraped dust will affect the measurement accuracy of the laser ranging module 15, causing errors in the straightening position measurement. Therefore, when the ring plate 74 rotates forward, in addition to driving the scraper 72 to scrape and clean the outer wall of the steel pipe body 5, it also drives the support ring 17 to rotate, which in turn drives the fan blade 18 to rotate, so that a negative pressure is formed on the left side of the fan blade 18, which sucks the cleaned dust to the left side of the support ring 17, thus avoiding the dust from affecting the measurement of the laser ranging module 15, thereby helping to improve the measurement efficiency of the laser ranging module 15.

[0048] Please see the appendix Figure 2 A negative pressure machine 12 is fixed on one side of the jacking base 3 near the support ring 17, and an electric push rod 16 is fixed on one side of the movable lifting base 6. The output end of the electric push rod 16 is fixed on the outer wall of the movable lifting base 6.

[0049] Specifically, dust located on the left side of the support ring 17 can escape into the working environment and affect the health of workers. Therefore, by setting up the negative pressure machine 12, an airflow channel from right to left is formed on the base 1. This channel can absorb the dust discharged from the support ring 17 and also absorb the air in the working environment for further purification, thereby helping to improve the safety of the working environment. The mobile lifting base 6 includes a lifting seat and a lifting block that slides on the upper side of the lifting seat. The outer wall of the lifting seat is fixed to one side of the electric push rod 16. A fixing plate is fixedly installed at the output end of the electric push rod 16. The outer wall of the fixing plate is fixed to the outer wall of the lifting block. Driven by the output end of the electric push rod 16, the lifting block is raised and lowered, thereby realizing the lifting function of the mobile lifting base 6.

[0050] Please see the appendix Figure 3 Appendix Figure 4 and attached Figure 5 On the other side of the ring seat 70, a motor 20 is fixed, and a gear 21 is fixedly provided at the output end of the motor 20. The tooth end of the gear 21 is meshed with a gear ring 13, and the inner side of the gear ring 13 is fixed to the outer side of the ring plate 74.

[0051] Specifically, the motor 20 can be a servo motor. The controller 2 controls the motor 20 to rotate in the forward direction, which drives the gear 21 to rotate the gear ring 13, and then drives the ring plate 74 to rotate in the forward direction, so as to realize the function of scraper 72 to scrape and clean the outer wall of the steel pipe body 5. The controller 2 controls the motor 20 to rotate in the reverse direction, which drives the steel pipe body 5 to rotate in coordination with the mobile water sprayer 8 to spray water for cooling, thereby helping to improve the efficiency of straightening the steel pipe body 5.

[0052] Please see the appendix Figure 1 Appendix Figure 3 and attached Figure 5 The inner wall of the connecting rod 41 is threaded with a telescopic rod 40. A connecting pipe 42 is fixed on the side of the connecting rod 41 away from the jacking base 3. Multiple opening and closing plates 44 are rotatably connected on the side of the connecting pipe 42 away from the connecting rod 41. A conical block 43 is fixed at one end of the telescopic rod 40. The outer wall of the conical block 43 and the outer walls of the multiple opening and closing plates 44 are in contact.

[0053] Specifically, when one end of the steel pipe body 5 is connected and fixed via the connecting rod 41, the right end of the connecting rod 41 is inserted into the inner wall of the left end of the steel pipe body 5. The telescopic rod 40 is rotated, and through the threaded connection between the telescopic rod 40 and the connecting rod 41, the telescopic rod 40 drives the conical block 43 to move towards the connecting rod 41. Through the conical surface of the conical block 43, multiple opening and closing plates 44 are pushed outward, so that the outer side of the opening and closing plate 44 is pressed tightly against the inner wall of the steel pipe body 5, thereby completing the connection and fixation between the connecting rod 41 and the steel pipe body 5. Furthermore, through the cooperation of the conical block 43 and the opening and closing plate 44, the fixing component 4 can connect and fix steel pipe bodies 5 with different inner diameters, thereby helping to improve the applicability of the straightening machine.

[0054] Please see the appendix Figure 2 and attached Figure 7 Both base 10 and base 21 are rotatably connected to the upper side of rotating rollers 22 and sliding rollers 23. Base 10 and base 21 are rotatably connected to the steel pipe body 5 through rotating rollers 22. The movable lifting base 6 and base 21 are slidably connected to the steel pipe body 5 through sliding rollers 23.

[0055] Specifically, the steel pipe body 5 moves left and right in cooperation with the sliding roller 23, and rotates during the straightening process in cooperation with the rotating roller 22.

[0056] Please see the appendix Figure 2 Appendix Figure 3 and attached Figure 8 A limiting component 19 is installed on the outer wall of the sliding roller 23 on the base 21. The limiting component 19 includes a bracket 191 that is rotatably connected to both sides of the sliding roller 23. A limiting plate 190 is attached to the lower side of the bracket 191. A spring 2 192 is fixed between the limiting plate 190 and the base 211. A groove 193 is provided on the upper side of the limiting plate 190 to cooperate with the sliding of the bracket 191. A push rod 14 is attached to the outer wall of the limiting plate 190. One end of the push rod 14 is fixed to the outer wall of the base 3.

[0057] Specifically, the height at which the sliding roller 23 on the base 21 supports the steel pipe body 5 is higher than the height at which the rotating roller 22 on the base 21 supports the steel pipe body 5. When the jacking base 3 pushes the steel pipe body 5 to move to the right, its outer wall is supported by the rolling cooperation of the sliding roller 23 on the base 21. The right end is supported by the sliding roller 23 on the movable lifting base 6. By raising the movable lifting base 6, the right end of the steel pipe body 5 is raised, so that the right end of the steel pipe body 5 is above the rotating roller 22. By lowering the movable lifting base 6, both ends of the steel pipe body 5 are supported by the rotating roller 22, thereby realizing the feeding of the straightening machine.

[0058] During this process, the top rod 14 will press the limiting plate 190, so that it overcomes the elastic potential energy of the second spring 192 and retracts into the interior of the second base 11. The bracket 191 moves down into the groove 193, so that the sliding roller 23 no longer supports the steel pipe body 5. At this time, the rotation of the steel pipe body 5 driven by the ring plate 74 will not interfere with the sliding roller 23, which helps to improve the accuracy of the water spraying and cooling position adjustment of the mobile water sprayer 8.

[0059] After straightening is completed, the movable lifting base 6 first lifts the left end of the steel pipe body 5, and the jacking base 3 moves to the left a certain distance, so that the jacking rod 14 releases the limit plate 190, so that the bracket 191 slides out of the groove 193, and the sliding roller 23 re-supports the left end of the steel pipe body 5. The movable lifting base 6 moves to the right end of the steel pipe body 5 and lifts the steel pipe body 5 away from the rotating roller 22 on the base 10. At this time, the right end of the steel pipe body 5 is higher than its left end. The controller 2 controls the movable lifting base 6 to move to the left, which can drive the steel pipe body 5 to move to the left. Then, with the cooperation of the jacking base 3, the output of the straightened steel pipe body 5 is completed.

[0060] Work process: One end of the steel pipe body 5 is connected to the jacking base 3 through the connecting rod 41, and the other end is placed on the upper side of the movable lifting base 6. By moving the jacking base 3, the other end of the steel pipe body 5 passes through the ring plate 74 at a certain speed. The controller 2 controls the electromagnet 77 and the magnetic block 75 to attract each other, so that the push rod 78 drives the scraper 72 to move towards the inside of the ring plate 74, thereby avoiding interference between the steel pipe body 5 and the scraper 72 when the steel pipe body 5 enters the ring plate 74.

[0061] Next, the forward rotation of the ring plate 74 drives the scraper 72 to rotate on the surface of the steel pipe body 5, scraping and cleaning the surface of the steel pipe body 5. At the same time, it drives the support ring 17 to rotate, which in turn drives the fan blade 18 to rotate, sucking the dust scraped by the scraper 72 to the right side of the support ring 17, thus avoiding the dust from affecting the measurement of the laser ranging module 15.

[0062] After cleaning, the steel pipe body 5 continues to move through the measurement area formed by multiple laser ranging modules 15, measuring the outer walls of the steel pipe body 5 and transmitting the data to the controller 2 for processing and analysis, calculating the position that needs straightening, the heating and insulation temperature, and the number of straightening operations.

[0063] Then, the controller 2 controls the intermediate frequency induction heater 9 to move to the position that needs to be straightened, heats it with a preset power, and keeps it warm for a certain period of time. The controller 2 controls the electromagnet 77 and the connecting rod 41 to attract each other, and the reverse rotation of the ring plate 74 drives the steel pipe body 5 to rotate, so that the position of the steel pipe body 5 that needs to be cooled and straightened can be rotated to the side covered by the mobile water sprayer 8. The mobile water sprayer 8 moves to the heating position to spray water to cool down and straighten, thereby avoiding the problem that pressing and straightening can easily cause local depressions and ovals, which affect the straightening effect.

[0064] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large-diameter thick-wall steel pipe press straightener comprising a base (1) and a steel pipe body (5), characterized in that, The upper side of the base (1) is fixed with a controller (2), a base one (10) and a base two (11). The lower outer walls of both ends of the steel pipe body (5) are respectively set on the upper side of the base one (10) and the base two (11). A fixing component (4) is installed on the inner wall of one end of the steel pipe body (5). The fixing component (4) includes a connecting rod (41) whose outer wall is attached to the inner wall of one end of the steel pipe body (5). The upper side of the base (1) has a sliding push base (3) and a moving base (4). The lifting base (6), the mobile water sprayer (8) and the medium frequency induction heater (9) are located on the side of the second base (11) away from the first base (10). The other end of the connecting rod (41) slides on the inner wall of the lifting base (3). The outer wall of the mobile lifting base (6) passes through both sides of the second base (11). Laser ranging modules (15) are provided on all four sides of the outer side of the steel pipe body (5). A cleaning component (7) is installed on one side of the second base (11).

2. A large-diameter thick-wall steel pipe press straightener according to claim 1, characterized by The cleaning assembly (7) includes a ring seat (70), one side of which is fixed to the side of the base two (11) away from the base one (10). A ring plate (74) is rotatably connected to the inner side of the ring seat (70). A plurality of fixed seats (73) are fixed to the inner side of the ring plate (74). A scraper (72) is rotatably connected to the side wall between the two sides of the fixed seat (73). One side of the scraper (72) is attached to the outer wall of the steel pipe body (5). A spring rod (71) is attached to the other side of the scraper (72). One end of the spring rod (71) is fixed to the inner wall of the ring plate (74).

3. A large-diameter thick-wall steel pipe press straightener according to claim 2, characterized by Multiple magnetic blocks (75) are fixed on the inner side of the ring plate (74). A slide cylinder (76) slides on the outer wall of the magnetic block (75). An electromagnet (77) is fixed on one side of the slide cylinder (76). A push rod (78) is fixed on the outer wall of the electromagnet (77). One end of the push rod (78) slides against one side of the scraper (72). A spring (79) is fixed between the side wall of the electromagnet (77) and the magnetic block (75). The outer wall of the electromagnet (77) and the outer wall of the connecting rod (41) are attached by magnetic adsorption.

4. A large-diameter thick-wall steel pipe press straightener according to claim 2, characterized by A support ring (17) is fixed on the side of the ring plate (74) away from the base (11). Several fan blades (18) are fixed on the inner side of the support ring (17). The outer wall of the fan blades (18) and the outer wall of the steel pipe body (5) are pre-set with a gap.

5. A large diameter, thick walled pipe press straightener as defined in claim 1 wherein, A negative pressure machine (12) is fixed on one side of the jacking base (3) near the support ring (17), and an electric push rod (16) is fixed on one side of the movable lifting base (6). The output end of the electric push rod (16) is fixed on the outer wall of the movable lifting base (6).

6. A large caliber thick wall pipe press straightener according to claim 2, characterized in that, A motor (20) is fixed on the other side of the ring seat (70). A gear (21) is fixedly provided at the output end of the motor (20). The tooth end of the gear (21) is meshed with a toothed ring (13). The inner side of the toothed ring (13) is fixed to the outer side of the ring plate (74).

7. A pressure straightening machine for large-diameter thick-walled steel pipes according to claim 1, characterized in that, The inner wall of the connecting rod (41) is threaded with a telescopic rod (40). A connecting pipe (42) is fixed on the side of the connecting rod (41) away from the jacking base (3). Multiple opening and closing plates (44) are rotatably connected on the side of the connecting pipe (42) away from the connecting rod (41). A conical block (43) is fixed at one end of the telescopic rod (40). The outer wall of the conical block (43) and the outer walls of the multiple opening and closing plates (44) are in contact.

8. A pressure straightening machine for large-diameter thick-walled steel pipes according to claim 1, characterized in that, The upper sides of both base one (10) and base two (11) are rotatably connected with rotating rollers (22) and sliding rollers (23). Base one (10) and base two (11) are rotatably connected to the steel pipe body (5) through rotating rollers (22), and base one (10) and base two (11) are slidably connected to the steel pipe body (5) through sliding rollers (23).

9. A pressure straightening machine for large-diameter thick-walled steel pipes according to claim 1, characterized in that, A limiting component (19) is installed on the outer wall of the sliding roller (23) on the second base (11). The limiting component (19) includes a bracket (191) rotatably connected to both sides of the sliding roller (23). A limiting plate (190) is attached to the lower side of the bracket (191). A spring (192) is fixed between the limiting plate (190) and the second base (11). A groove (193) is provided on the upper side of the limiting plate (190) to cooperate with the sliding of the bracket (191). A top rod (14) is attached to the outer wall of the limiting plate (190). One end of the top rod (14) is fixed to the outer wall of the jacking base (3).

10. A heating and straightening method for a pressure straightening machine for large-diameter thick-walled steel pipes, characterized in that, A pressure straightening machine for a large-diameter thick-walled steel pipe according to any one of claims 1-9 includes the following steps: S1, connecting one end of the steel pipe body (5) to the jacking base (3) via a connecting rod (41), and placing the other end on the upper side of the movable lifting base (6). By moving the jacking base (3), the other end of the steel pipe body (5) passes through the ring plate (74) at a certain speed; S2, by rotating the ring plate (74) in the forward direction, driving the scraper (72) to rotate on the surface of the steel pipe body (5) to scrape and clean the surface of the steel pipe body (5). After cleaning, the steel pipe body (5) continues to move through the measurement area formed by multiple laser ranging modules (15) to measure the outer wall of the steel pipe body (5) and transmit the data to the controller (2) for processing and distribution. S3. Next, by adjusting the lifting mechanism of the moving lifting base (6), the steel pipe body (5) passes through the heating end of the medium frequency induction heater (9), and its two ends move to the upper side of the base one (10) and the base two (11). The controller (2) controls the medium frequency induction heater (9) to move to the position to be straightened, heat it with the preset power, and keep it warm for a certain time. S4. Then, the controller (2) controls the electromagnet (77) to be attracted to the outer wall of the connecting rod (41). By rotating the ring plate (74) in the opposite direction, the steel pipe body (5) is driven to rotate, and the heating position is rotated to face the moving water sprayer (8). The moving water sprayer (8) sprays water to the heating position to cool it down and straighten it.

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