A heat treatment circulating water system for steel pipe production

Abstract

The application discloses a heat treatment circulating water system for steel pipe production and relates to the technical field of steel pipe production.The heat treatment circulating water system comprises a heat treatment cooling box and a steel pipe body, a water tank is fixedly arranged in the heat treatment cooling box, a pump is arranged on one side of the water tank, the pump penetrates through the heat treatment cooling box, a water guide pipe is connected to one side of the pump, the other end of the water guide pipe is connected with a fixing box, and the fixing box is fixedly connected to the upper surface of the heat treatment cooling box.The heat treatment circulating water system is provided with a conveying and filtering assembly, and the steel pipe body can be automatically conveyed to a water treatment station to complete cooling treatment by the cooperation of the electric sliding rail and the electric sliding block, so that the labor intensity of the operator is effectively reduced, the overall operation efficiency of the steel pipe heat treatment is remarkably improved, meanwhile, the assembly can effectively prevent various metal impurities from being accumulated and caked on the surface of the filter screen, prevent the filter screen from being blocked to cause the continuous attenuation of the filtering effect, and ensure that the circulating water can be efficiently purified.

Description

Technical Field

[0001] This invention relates to the field of steel pipe production technology, specifically to a heat treatment circulating water system for steel pipe production. Background Technology

[0002] Steel pipes are made by piercing steel ingots or solid tube blanks to form rough tubes, which are then hot-rolled, cold-rolled, or cold-drawn. Steel pipes are not only used for transporting fluids and powdery solids, exchanging heat energy, and manufacturing mechanical parts and containers, but they are also an economical steel material. Using steel pipes to manufacture building structural frames, columns, and mechanical supports can reduce weight and save 20-40% of metal. In the steel pipe processing and production process, heat treatment is a key process to improve the mechanical properties of steel pipes and ensure product quality. After being heated at high temperatures, steel pipes need to be rapidly cooled by circulating cooling water spraying to achieve tempering, quenching, and other process treatments.

[0003] Existing steel pipe heat treatment equipment requires manual labor to transport the steel pipes to the water treatment station for cooling and other related processes. This not only increases the labor intensity of operators but also seriously affects the overall efficiency of steel pipe heat treatment. Furthermore, during the cooling process, the circulating water easily mixes with large amounts of iron oxide filings, scale, and various metallic impurities. Existing circulating water filtration structures often use fixed installation methods, allowing impurities to accumulate and clump on the filter screen, leading to filter blockage and a continuous decline in filtration efficiency. This results in ineffective purification of the circulating water and affects the subsequent cooling quality of the steel pipes. Secondly, commercially available heat treatment equipment for steel pipe production uses fixed-size equipment to fix the steel pipes, making it difficult to process steel pipes of different diameters. To address these problems, the inventor proposes a circulating water system for heat treatment in steel pipe production. Summary of the Invention

[0004] To address the issues of relying on manual labor to transport steel pipes to the water treatment station for cooling and other related processes, which increases the labor intensity of operators, and the fact that existing circulating water filtration structures mostly use fixed installation methods, impurities easily accumulate and clump on the filter screen surface, leading to filter screen blockage and difficulty in processing steel pipes of different diameters during use, the present invention aims to provide a heat treatment circulating water system for steel pipe production.

[0005] To solve the above technical problems, the present invention adopts the following technical solution: a heat treatment circulating water system for steel pipe production, comprising a heat treatment cooling box and a steel pipe body, wherein a water tank is fixedly installed inside the heat treatment cooling box, a pump is installed on one side of the water tank, the pump penetrates the heat treatment cooling box, a water guide pipe is connected to one side of the pump, and a fixed box is connected to the other end of the water guide pipe, the fixed box is fixedly connected to the upper surface of the heat treatment cooling box, a water nozzle is fixedly installed on the lower surface of the fixed box, the water nozzle penetrates the heat treatment cooling box, a conveying and filtering assembly is connected between the heat treatment cooling box and the water tank, a drain pipe is connected to one side of the water tank, the drain pipe penetrates the heat treatment cooling box, an electric valve is connected to the outer surface of the drain pipe, and an observation window is provided on one side of both the water tank and the heat treatment cooling box; The conveying and filtering assembly includes two electric slide rails symmetrically arranged inside the heat treatment cooling box. Electric sliders slide within each slide rail, and a fixed frame is fixed between the two electric sliders. A U-shaped rod is fixed to the lower surface of the fixed frame. A first connecting frame is fixed inside the water tank, and a first spring is fixed to the upper surface of the first connecting frame. A second connecting frame is fixed to the upper surface of the first spring, and a U-shaped block is fixed to the upper surface of the second connecting frame. Several U-shaped blocks are arranged in an array on the upper surface of the second connecting frame, and the U-shaped rod slides in contact with the U-shaped blocks. A filter frame is installed inside the second connecting frame, and a connection port is opened on the upper surface of the second connecting frame. A U-shaped rod is fixed to the side of the filter frame. The filter has a connecting block that makes movable contact with the inner surface of the connection port. A socket is provided on one side of the connecting block. A hollow block is fixed inside the filter frame. A movable rod is movably inserted into the hollow block. A sleeve is fixed to one end of the movable rod. The sleeve slides against the inner surface of the hollow block. A second spring is fixed between the sleeve and the inner surface of the hollow block. A plug is fixed to the side of the sleeve away from the second spring. The end of the plug is movably inserted into the socket. A connecting shaft is fixed to the end of the movable rod away from the plug. A damping lever is provided at the end of the connecting shaft. A groove is provided on the second connecting frame. The lever is located in the groove. A lifting rod is fixed to the upper surface of the connecting block. The lifting rod has an inverted concave cross-section. A steel pipe support assembly is fixedly provided on the upper surface of the fixed frame, and the steel pipe support assembly is movably fitted with the inner wall of the steel pipe body.

[0006] Preferably, the steel pipe support assembly includes a support plate, which is fixedly connected to the upper surface of the fixed frame. A cross plate is fixedly installed inside the support plate, and a fixed cylinder is fixedly installed on one side of the cross plate. A lead screw is rotatably installed inside the fixed cylinder. A cylinder is movably fitted onto the outer surface of the fixed cylinder. The other end of the lead screw is rotatably connected to the inner surface of the cylinder. A bracket is fixedly installed on one side of the cylinder, and a drive motor is fixedly installed on one side of the bracket. The drive end of the drive motor is rotatably connected to one end of the lead screw via a coupling. A bracket is fixedly installed on the outer surface of the cylinder. The system includes a first horizontal plate, a rotating plate rotatably mounted on the side of the first horizontal plate, a second horizontal plate rotatably connected to the other end of the rotating plate, an L-shaped connecting plate fixedly mounted on one side of the second horizontal plate, the L-shaped connecting plate slidingly fitting against the side of the cross plate, a protective shell fixedly mounted on one side of the support, a drive motor mounted inside the protective shell, a sliding groove opened inside the cross plate, a first slider slidingly mounted in the sliding groove, the first slider fixedly connected to the L-shaped connecting plate, and an arc-shaped support plate fixedly mounted on the side of the L-shaped connecting plate, the arc-shaped support plate movably fitting against the inner wall of the steel pipe body.

[0007] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By setting up a conveying and filtering component, the present invention can automatically transport the steel pipe body to the water treatment station for cooling treatment by means of the synergistic action of electric slide rail and electric slider. This effectively reduces the labor intensity of operators and significantly improves the overall operation efficiency of steel pipe heat treatment. At the same time, the component can effectively prevent various metal impurities from accumulating and agglomerating on the filter screen surface, preventing the problem of filter screen blockage and continuous decline in filtration effect, and ensuring that circulating water can be purified efficiently.

[0008] 2. By setting up a steel pipe support component, the present invention can flexibly adjust the support structure according to the difference in the inner diameter of the steel pipe, so as to achieve stable and close support for the inner wall of steel pipes of different diameters, ensuring that the steel pipe will not shift or shake during the cooling process, ensuring the dimensional accuracy and processing consistency of the steel pipe heat treatment, greatly improving the versatility and adaptability of the device, and meeting the processing needs of various specifications of steel pipes without replacing the support components. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of the present invention.

[0011] Figure 2 This is a schematic diagram of the water pipe structure of the present invention.

[0012] Figure 3 This is a schematic diagram of the fixed box structure of the present invention.

[0013] Figure 4 This is a schematic diagram of the filter frame structure of the present invention.

[0014] Figure 5 This is a schematic diagram of the water tank structure of the present invention.

[0015] Figure 6 This is a schematic diagram of the U-shaped rod structure of the present invention.

[0016] Figure 7 This is a schematic diagram of the hollow block structure of the present invention.

[0017] Figure 8 This is a schematic diagram of the support plate structure of the present invention.

[0018] Figure 9 This is a schematic diagram of the first horizontal plate structure of the present invention.

[0019] In the diagram: 1. Heat treatment cooling box; 2. Water tank; 21. Drain pipe; 22. Electric valve; 23. Observation window; 31. Pump; 32. Water guide pipe; 33. Fixed box; 34. Water head; 4. Conveying and filtering assembly; 41. Electric slide rail; 42. Electric slider; 43. Fixed frame; 44. U-shaped rod; 45. First connecting frame; 46. First spring; 47. Second connecting frame; 48. U-shaped block; 49. Filter frame; 5. Connection port; 51. Connecting block; 511. Lifting rod; 52. Insertion hole; 53. 54. Hollow block; 55. Movable rod; 56. Second spring; 57. Sleeve plate; 58. Insert rod; 59. Connecting shaft; 50. Pulley; 61. Groove; 62. Steel pipe support assembly; 63. Support plate; 64. Cross plate; 65. Fixed cylinder; 66. Lead screw; 67. Cylinder; 68. Bracket; 69. Protective shell; 60. Drive motor; 61. First horizontal plate; 62. Rotating plate; 73. Second horizontal plate; 74. L-shaped connecting plate; 75. Slide groove; 76. First slider; 77. Arc-shaped support plate; 8. Steel pipe body. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below 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.

[0021] Example 1: As Figure 1-9As shown, the present invention provides a heat treatment circulating water system for steel pipe production, including a heat treatment cooling tank 1 and a steel pipe body 8. A water tank 2 is fixedly installed inside the heat treatment cooling tank 1. A pump 31 is installed on one side of the water tank 2. The pump 31 penetrates the heat treatment cooling tank 1. A water guide pipe 32 is connected to one side of the pump 31. A fixed box 33 is connected to the other end of the water guide pipe 32. The fixed box 33 is fixedly connected to the upper surface of the heat treatment cooling tank 1. A water nozzle 34 is fixedly installed on the lower surface of the fixed box 33. The water nozzle 34 penetrates the heat treatment cooling tank 1. A conveying and filtering assembly 4 is connected between the heat treatment cooling tank 1 and the water tank 2. The conveying and filtering assembly 4 includes two electric slide rails 41, which are symmetrically arranged inside the heat treatment cooling box 1. Electric sliders 42 are slidably mounted within each electric slide rail 41. A fixing frame 43 is fixed between the two electric sliders 42. A U-shaped rod 44 is fixedly mounted on the lower surface of the fixing frame 43. A first connecting frame 45 is fixedly mounted inside the water tank 2. A first spring 46 is fixedly mounted on the upper surface of the first connecting frame 45. A second connecting frame 47 is fixedly mounted on the upper surface of the first spring 46. A U-shaped block 48 is fixedly mounted on the upper surface of the second connecting frame 47. The U-shaped rod 44 slides in contact with the U-shaped block 48. A filter frame 49 is installed inside the second connecting frame 47. Activating the electric slide rails 41 allows the electric sliders to slide... When block 42 moves, the electric slider 42 drives the fixed frame 43 to move, thereby conveying the steel pipe body 8 to below the water head 34. By starting the pump 31, water in the water tank 2 can be introduced into the fixed box 33 through the water guide pipe 32, and finally sprayed out by the water head 34. After the water comes into contact with the steel pipe body 8, the metal impurities are filtered by the filter frame 49, and the water returns to the water tank 2 for recycling. During the movement of the fixed frame 43, the U-shaped rod 44 can come into contact with the U-shaped block 48. When the U-shaped rod 44 comes into contact with the U-shaped block 48, the first spring 46 can cause the filter frame 49 to vibrate, thereby preventing the accumulation of clumps on the surface of the filter frame 49 and avoiding the continuous decay of the filtration effect. The upper surface of the second connecting frame 47 is provided with a connecting A connecting block 51 is fixedly provided on the side of the filter frame 49. The connecting block 51 is in movable contact with the inner surface of the connecting port 5. An insertion hole 52 is provided on one side of the connecting block 51. A hollow block 53 is fixedly provided inside the filter frame 49. A movable rod 54 is movably inserted into the hollow block 53. A sleeve plate 56 is fixedly provided at one end of the movable rod 54. The sleeve plate 56 slides against the inner surface of the hollow block 53. A second spring 55 is fixed between the sleeve plate 56 and the inner surface of the hollow block 53. An insertion rod 561 is fixedly provided on the side of the sleeve plate 56 away from the second spring 55. The end of the insertion rod 561 is movably inserted into the insertion hole 52. A connecting shaft 57 is fixedly provided at the end of the movable rod 54 away from the insertion rod 561. The end of the connecting shaft 57 is equipped with a damping rotating block 58. When it is necessary to clean impurities, the block 58 can be rotated to a vertical position through the arc-shaped notch on its side. The connecting shaft 57 can then pull the movable rod 54 to move, causing the sleeve 56 to move along the hollow block 53. The second spring 55 is compressed, and the insertion rod 561 disengages from the insertion hole 52. The lifting rod 511 can then be moved upwards. The lifting rod 511, through the connecting block 51, can move the filter frame 49 upwards. After removing the filter frame 49 from the heat treatment cooling box 1, it is cleaned. After cleaning, the filter frame 49 is placed into the second connecting frame 47, and the connecting block 51 is placed into the connecting port 5. After rotating the block 58 to make it parallel,The insertion rod 561 is inserted into the socket 52 to complete the limiting action; A steel pipe support assembly 6 is fixedly provided on the upper surface of the fixed frame 43, and the steel pipe support assembly 6 is movably fitted with the inner wall of the steel pipe body 8.

[0022] The second connecting frame 47 has a groove 59, and the toggle block 58 is disposed in the groove 59, which facilitates the placement of the toggle block 58 and also facilitates the rotation of the toggle block 58.

[0023] The U-shaped blocks 48 are provided in a plurality of arrays and distributed on the upper surface of the second connecting frame 47, providing a continuous vibration force to the filter frame 49 when the U-shaped rod 44 moves. A drain pipe 21 is connected to one side of the water tank 2. The drain pipe 21 passes through the heat treatment cooling box 1. An electric valve 22 is connected to the outer surface of the drain pipe 21. Water in the water tank 2 can be discharged by activating the electric valve 22. The upper surface of the connecting block 51 is fixedly provided with a lifting rod 511. The cross-sectional shape of the lifting rod 511 is an inverted "concave" shape, which makes it easy to lift the filter frame 49. Both the water tank 2 and the heat treatment cooling box 1 are provided with observation windows 23 on one side, which makes it easy to observe the water level in the water tank 2. The steel pipe support assembly 6 includes a support plate 61, which is fixedly connected to the upper surface of the fixed frame 43. A cross plate 62 is fixedly installed inside the support plate 61. A fixed cylinder 63 is fixedly installed on one side of the cross plate 62. A lead screw 631 is rotatably installed inside the fixed cylinder 63. A cylinder 64 is movably fitted on the outer surface of the fixed cylinder 63. The other end of the lead screw 631 is rotatably connected to the inner surface of the cylinder 64. A bracket 65 is fixedly installed on one side of the cylinder 64. A drive motor 66 is fixedly installed on one side of the bracket 65. The drive end of the drive motor 66 is rotatably connected to one end of the lead screw 631 via a coupling drive shaft. A first horizontal plate 67 is fixedly installed on the outer surface of the cylinder 64. A rotating plate 68 is rotatably installed on the side of the first horizontal plate 67. The other end of 68 is rotatably connected to a second horizontal plate 69. An L-shaped connecting plate 7 is fixedly provided on one side of the second horizontal plate 69. The L-shaped connecting plate 7 slides against the side of the cross plate 62. Water can be added into the water tank 2, and the water level can be observed through the observation window 23. Then, the steel pipe body 8 to be processed can be sleeved on the outer surface of the arc-shaped support plate 73. Then, the screw 631 can be rotated by starting the drive motor 66. The screw 631 rotates along the thread provided inside the fixed cylinder 63, so that the cylinder 64 can slide along the fixed cylinder 63. The L-shaped connecting plate 7 can be pushed to slide to the side by the rotating plate 68 on the side of the first horizontal plate 67. The first slider 72 slides along the slide groove 71, so that the arc-shaped support plate 73 can contact the inner wall of the steel pipe body 8, which can support steel pipes of different diameters. A protective shell 651 is fixedly provided on one side of the bracket 65. The drive motor 66 is installed inside the protective shell 651 to facilitate the protection of the drive motor 66. A sliding groove 71 is provided inside the cross plate 62. A first slider 72 is slidably provided in the sliding groove 71. The first slider 72 is fixedly connected to the L-shaped connecting plate 7 to assist the movement of the L-shaped connecting plate 7. An arc-shaped support plate 73 is fixedly provided on the side of the L-shaped connecting plate 7. The arc-shaped support plate 73 is movably fitted with the inner wall of the steel pipe body 8 to improve the stability of the support for the steel pipe body 8.

[0024] Working principle: Before use, the steel pipe body 8 is preheated, quenched and tempered at high temperature by an external heat treatment device. After the heat treatment process is completed, the steel pipe body 8 is placed in the heat treatment cooling box 1. Water can be added to the water tank 2, and the water level can be observed through the observation window 23. Then, the steel pipe body 8 to be processed can be sleeved on the outer surface of the arc-shaped support plate 73. Then, the drive motor 66 can be started to make the lead screw 631 rotate. The lead screw 631 rotates along the thread set inside the fixed cylinder 63, so that the cylinder 64 can slide along the fixed cylinder 63. The L-shaped connecting plate 7 can be pushed to slide to the side by the side rotating plate 68 of the first horizontal plate 67. The first slider 72 slides along the slide groove 71, so that the arc-shaped support plate 73 can contact the inner wall of the steel pipe body 8, which can support steel pipes of different diameters. By activating the electric slide rail 41, the electric slider 42 can be moved, which in turn moves the fixed frame 43, thereby transporting the steel pipe body 8 to below the water head 34. By activating the pump 31, water in the water tank 2 can be introduced into the fixed box 33 through the water guide pipe 32, and finally sprayed out by the water head 34. After the water comes into contact with the steel pipe body 8, the metal impurities are filtered by the filter frame 49, and the water returns to the water tank 2 for recycling. During the movement of the fixed frame 43, the U-shaped rod 44 can come into contact with the U-shaped block 48. When the U-shaped rod 44 comes into contact with the U-shaped block 48, the first spring 46 can cause the filter frame 49 to vibrate, thereby preventing the accumulation of clumps on the surface of the filter frame 49 and avoiding the continuous decay of the filtration effect. When it is necessary to clean impurities, the lever 58 can be turned to a vertical position through the arc-shaped notch on the side of the lever 58. The movable rod 54 can be moved by the connecting shaft 57, the sleeve 56 moves along the hollow block 53, the second spring 55 is compressed, and the insertion rod 561 is disengaged from the insertion hole 52. Then, the lifting rod 511 can be moved upward by the lifting rod 511. The lifting rod 511 can move the filter frame 49 upward by the connecting block 51. After the filter frame 49 is taken out of the heat treatment cooling box 1, it is cleaned. After cleaning, the filter frame 49 is placed into the second connecting frame 47, and the connecting block 51 is placed into the connecting port 5. After rotating the lever 58 to make it parallel, the insertion rod 561 is inserted into the insertion hole 52 to complete the limit.

[0025] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A heat treatment circulating water system for steel pipe production, comprising a heat treatment cooling tank (1) and a steel pipe body (8), characterized in that: A water tank (2) is fixedly installed inside the heat treatment cooling box (1). A pump (31) is installed on one side of the water tank (2). The pump (31) penetrates the heat treatment cooling box (1). A water guide pipe (32) is connected to one side of the pump (31). A fixed box (33) is connected to the other end of the water guide pipe (32). The fixed box (33) is fixedly connected to the upper surface of the heat treatment cooling box (1). A water nozzle (34) is fixedly installed on the lower surface of the fixed box (33). The water nozzle (34) penetrates the heat treatment cooling box (1). A conveying and filtering assembly (4) is connected between the heat treatment cooling box (1) and the water tank (2). The conveying and filtering assembly (4) includes two electric slide rails (41), which are symmetrically arranged inside the heat treatment cooling box (1). Electric sliders (42) slide within each electric slide rail (41). A fixed frame (43) is fixed between the two electric sliders (42). A U-shaped rod (44) is fixedly mounted on the lower surface of the fixed frame (43). A first connecting frame (45) is fixedly mounted inside the water tank (2). A first spring (46) is fixedly mounted on the upper surface of the first connecting frame (45). A second connecting frame (47) is fixedly mounted on the upper surface of the first spring (46). A U-shaped block (48) is fixedly mounted on the upper surface of the second connecting frame (47). The U-shaped rod (44) slides in contact with the U-shaped block (48). A filter frame (49) is installed inside the second connecting frame (47). A connection port (5) is opened on the upper surface of the second connecting frame (47). A connecting block (51) is fixedly provided on the side of the filter frame (49). The connecting block (51) is in movable contact with the inner surface of the connecting port (5). A socket (52) is provided on one side of the connecting block (51). A hollow block (53) is fixedly provided inside the filter frame (49). A movable rod (54) is movably inserted into the hollow block (53). A sleeve plate (56) is fixedly provided at one end of the movable rod (54). The sleeve plate (56) slides against the inner surface of the hollow block (53). A second spring (55) is fixed between the sleeve plate (56) and the inner surface of the hollow block (53). A plug rod (561) is fixedly provided on the side of the sleeve plate (56) away from the second spring (55). The end of the plug rod (561) is movably inserted into the socket (52). A connecting shaft (57) is fixedly provided at the end of the movable rod (54) away from the plug rod (561). A damping lever (58) is provided at the end of the connecting shaft (57). The upper surface of the fixed frame (43) is fixedly provided with a steel pipe support assembly (6), and the steel pipe support assembly (6) is movably fitted with the inner wall of the steel pipe body (8).

2. The heat treatment circulating water system for steel pipe production as described in claim 1, characterized in that, The second connecting frame (47) has a groove (59) and the pusher block (58) is disposed in the groove (59).

3. The heat treatment circulating water system for steel pipe production as described in claim 1, characterized in that, The U-shaped blocks (48) are provided in a plurality of arrays, and the U-shaped blocks (48) are arranged in an array on the upper surface of the second connecting frame (47).

4. The heat treatment circulating water system for steel pipe production as described in claim 1, characterized in that, A drain pipe (21) is connected to one side of the water tank (2), the drain pipe (21) passes through the heat treatment cooling box (1), and an electric valve (22) is connected to the outer surface of the drain pipe (21).

5. A heat treatment circulating water system for steel pipe production as described in claim 1, characterized in that, The upper surface of the connecting block (51) is fixedly provided with a lifting rod (511), and the cross-sectional shape of the lifting rod (511) is an inverted "concave" shape.

6. The heat treatment circulating water system for steel pipe production as described in claim 1, characterized in that, Both the water tank (2) and the heat treatment cooling tank (1) are provided with observation windows (23) on one side.

7. A heat treatment circulating water system for steel pipe production as described in claim 1, characterized in that, The steel pipe support assembly (6) includes a support plate (61), which is fixedly connected to the upper surface of the fixed frame (43). A cross plate (62) is fixedly installed inside the support plate (61). A fixed cylinder (63) is fixedly installed on one side of the cross plate (62). A lead screw (631) is rotatably installed inside the fixed cylinder (63). A cylinder (64) is movably fitted on the outer surface of the fixed cylinder (63). The other end of the lead screw (631) is rotatably connected to the inner surface of the cylinder (64). A bracket (65) is fixedly installed on one side of the cylinder (64). A drive motor (66) is fixedly provided on one side of the bracket (65). The drive end of the drive motor (66) is rotatably connected to one end of the lead screw (631) through a coupling drive shaft. A first horizontal plate (67) is fixedly provided on the outer surface of the cylinder (64). A rotating plate (68) is rotatably provided on the side of the first horizontal plate (67). A second horizontal plate (69) is rotatably connected to the other end of the rotating plate (68). An L-shaped connecting plate (7) is fixedly provided on one side of the second horizontal plate (69). The L-shaped connecting plate (7) slides against the side of the cross plate (62).

8. A heat treatment circulating water system for steel pipe production as described in claim 7, characterized in that, A protective shell (651) is fixedly provided on one side of the bracket (65), and the drive motor (66) is disposed inside the protective shell (651).

9. A heat treatment circulating water system for steel pipe production as described in claim 7, characterized in that, The cross plate (62) has a groove (71) inside, and a first slider (72) is slidably disposed in the groove (71). The first slider (72) is fixedly connected to the L-shaped connecting plate (7).

10. A heat treatment circulating water system for steel pipe production as described in claim 7, characterized in that, The L-shaped connecting plate (7) is fixedly provided with an arc-shaped support plate (73) on its side, and the arc-shaped support plate (73) is movably fitted with the inner wall of the steel pipe body (8).

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