A straightening device for precision machining of steel for gas and oil pipelines

Abstract

The present invention relates to the technical field of precision pipeline machining, and more specifically, to a straightening device for precision machining steel materials for gas and oil pipelines, comprising a device body, a stress detection device, a secondary straightening frame, and a pipe outlet device. The straightening frame is fixedly mounted on the top of the device body, and multiple sets of first straightening rollers and multiple sets of second straightening rollers are mounted inside the straightening frame, wherein the first straightening rollers and the second straightening rollers are arranged perpendicular to each other. The straightening frame is externally mounted with a drive structure for driving the multiple sets of first straightening rollers and second straightening rollers to rotate. The stress detection device is mounted at one end of the straightening frame, and the stress detection device is a rectangular frame-shaped structure. Four evenly distributed fixed sleeves are fixedly connected to the inner wall of the stress detection device. The present invention applies a force greater than the stress but in the opposite direction to the stress on the bent pipe, thereby completely eliminating the original stress and straightening the pipe. This invention is of great significance for the straightening of precision pipelines, and is low-cost and easy to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline precision machining, and in particular to a straightening device for precision machining of steel materials for gas and oil pipelines. Background Art

[0002] Petroleum is a fluid mineral buried deep underground. Initially, people called naturally occurring oily liquid minerals petroleum, combustible gases natural gas, and solid, combustible oil minerals asphalt. As research on these minerals deepened, it was realized that they were all hydrocarbon compounds in composition and were related in origin, so they were collectively referred to as petroleum. Petroleum extraction also includes natural gas extraction. Petroleum plays a vital role in the national economy. Petroleum is an important energy source, and its transportation after extraction is also crucial. Currently, most oil and gas transportation uses steel pipes, which are composited with various corrosion-resistant and pressure-resistant materials on their inner and outer layers. The interior of the steel pipe needs to be very smooth and free of bends, otherwise the speed of oil and gas transmission will be reduced. Bent steel pipes require straightening using a straightener.

[0003] Straightening machines in the existing technology generally use multiple rollers to squeeze steel pipes to straighten bent steel pipes. However, the steel pipes themselves have a certain elasticity, and the rollers only squeeze the steel pipes to their original diameter. After rolling, the pipes will rebound due to the internal stress of the pipes, resulting in low straightness of the pipes after direct straightening. This is not suitable for gas and oil pipelines with strict requirements. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the background technology and to propose a straightening device for precise processing of steel materials for gas and oil pipelines.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The cam is secured to the upper edge of the support frame, and the cam is secured to the lower edge of the support frame with respect to the first and second support members. The pressure plate is located on the inner side of the fixed ring, and the outer sleeve of the sliding column is provided with a return spring for pushing the pressure plate to return to its original position. The outer wall of the sliding block is provided with a movable groove, and the inner wall of the movable groove is fixedly connected to the first movable grid, and the inner wall of the fixed sleeve is fixedly connected to the first fixed grid, and the outer wall of the first fixed grid is in contact with the outer wall of the first movable grid; a secondary straightening frame, the secondary straightening frame is installed at the end of the stress detection device away from the straightening frame, and four evenly distributed electric push rods are fixedly connected to the secondary straightening frame, and the electric push rods include a driving seat and an inner Sliding rod, the outer wall of the driving seat is fixedly connected with a fixed plate, the driving seat is fixedly connected to the inner wall of the secondary straightening frame through the set fixed plate, the driving seat can drive the inner sliding rod to make a linear motion, one end of the inner sliding rod is fixedly connected with a pressure roller, the pressure roller is located on the inner side of the secondary straightening frame, the outer wall of the inner sliding rod is fixedly connected with a second moving grid, the inner wall of the secondary straightening frame is fixedly connected with a second fixed grid that cooperates with the second moving grid; and a pipe outlet device, the pipe outlet device is installed at one end of the secondary straightening frame away from the stress detection device.

[0007] In the above-mentioned straightening device for precision processing of steel for gas and oil pipelines, the driving structure includes a first motor and a second motor, and a first transmission box and a second transmission frame are fixedly installed on the outer wall of the straightening frame. The first motor drives multiple groups of first straightening rollers to rotate through the first transmission box, and the second motor drives multiple groups of second straightening rollers to rotate through the second transmission frame.

[0008] In the above-mentioned straightening device for precise processing of steel materials for gas and oil pipelines, the pressing plate includes an arc-shaped plate and a baffle, and the baffle is fixedly connected to one end of the arc-shaped plate close to the straightening frame.

[0009] In the above-mentioned straightening device for precise processing of steel materials for gas and oil pipelines, a plurality of fixed pulleys are installed on the outer wall of the sliding block.

[0010] In the above-mentioned straightening device for precision processing of steel for gas and oil pipelines, the pipe outlet device includes two fixed frames, which are symmetrically distributed with each other, one end of the fixed frame is fixedly connected to the outer wall of the secondary straightening frame, and two parallel pipe outlet rollers are rotatably connected between the two fixed frames, and the pipe outlet rollers are horizontally arranged.

[0011] In the above-mentioned straightening device for precision processing of steel for gas and oil pipelines, the straightening frame is fixedly connected to a pipe feeding device at one end away from the stress detection device, and two mutually parallel pipe feeding rollers are fixedly connected to the inner wall of the pipe feeding device. The pipe feeding rollers are horizontally arranged, and the two pipe feeding rollers are driven by the first motor and the first transmission box to rotate. Two symmetrically distributed auxiliary rollers are rotatably connected on both sides of the inside of the pipe feeding device, and the auxiliary rollers are vertically arranged.

[0012] In the above-mentioned straightening device for precise processing of steel for gas and oil pipelines, a slag discharge channel is opened on the inner wall of the device body, the upper end of the slag discharge channel extends to the bottom of the straightening frame, and the lower end of the slag discharge channel extends to the outside of the device body.

[0013] In the above-mentioned straightening device for precise processing of steel materials for gas and oil pipelines, a plurality of rollers are fixedly mounted on the bottom of the device body, and a control box is fixedly connected to the top of the device body.

[0014] Compared with existing technologies, the advantages of this straightening device for precision machining of steel for gas and oil pipelines are:

[0015] 1. Through the stress detection device, secondary straightening frame, and pipe outlet device, if the steel pipe is bent, the bent part will press against the corresponding pressure plate inside the stress detection device, causing the slider inside the fixed sleeve to slide, causing the first movable grid and the first fixed grid to be misaligned, thereby detecting the bending amount of the steel pipe. Subsequently, the bent part of the steel pipe moves into the interior of the secondary straightening frame. According to the detected bending amount, the inner slide bar moves toward the steel pipe and squeezes the steel pipe by 1.5 to 2.5 times the bending amount. By applying a force greater than the stress but in the opposite direction to the bent pipe, the original stress is completely eliminated, the pipe is straightened, and the pipeline can be straightened more completely.

[0016] 2. The setting of the baffle can make the head of the steel pipe slide into the inner side of the pressure plate along the baffle when the head of the steel pipe is bent, so as to avoid the head of the steel pipe from getting stuck;

[0017] 3. When testing the bending degree of the steel pipe, the bent part will press against the corresponding pressure plate inside the stress detection device, causing the slider inside the fixed sleeve to slide, causing the first movable grid and the first fixed grid to be dislocated, thereby detecting the bending amount of the steel pipe. The capacitance between the movable and fixed grids changes according to a certain rule as their relative displacement, thereby detecting the bending amount. The bending amount is detected very quickly, and the structure is simple and the cost is low.

[0018] In summary, the present invention applies a force greater than the stress but in the opposite direction to the bent pipe, thereby completely eliminating the original stress and straightening the pipe. This is of great significance for the straightening of precision pipes, and is low-cost and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention in another direction;

[0021] Figure 3 It is a schematic cross-sectional view of the present invention;

[0022] Figure 4 It is an enlarged schematic diagram of the structure of the stress detection device of the present invention;

[0023] Figure 5 It is an enlarged schematic diagram of the structure of the secondary straightening frame of the present invention;

[0024] Figure 6 It is a partial cross-sectional structural schematic diagram of the present invention;

[0025] Figure 7 It is a partial structural schematic diagram of the stress detection device of the present invention;

[0026] Figure 8 is a schematic cross-sectional structural diagram of the stress detection device of the present invention;

[0027] Figure 9 It is an enlarged schematic diagram of the structure of the slider of the present invention;

[0028] Figure 10 The present invention Figure 6 A schematic diagram of the structure at point A in the middle;

[0029] Figure 11 The present invention Figure 8 A magnified schematic diagram of the structure at point B.

[0030] Figure: 1, device body; 2, straightening frame; 3, first straightening roller; 4, second straightening roller; 5, stress detection device; 6, secondary straightening frame; 7, pipe outlet device; 8, fixed ring; 9, fixed sleeve; 10, pressure plate; 11, slide column; 12, return spring; 13, slider; 14, movable groove; 15, first movable fence; 16, first fixed fence; 17, electric push rod; 18, pressure roller; 19, drive seat; 20, inner Slide rod; 21. Second fixed grid; 22. Second movable grid; 23. Fixed plate; 24. First motor; 25. First transmission box; 26. Second motor; 27. Second transmission frame; 28. Slag discharge channel; 29. ​​Roller; 30. Control box; 31. Slide hole; 32. Arc plate; 33. Baffle; 34. Fixed pulley; 35. Fixed frame; 36. Pipe discharge roller; 37. Pipe inlet device; 38. Pipe delivery roller; 39. Auxiliary roller. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0033] Reference Figures 1-11A straightening device for precision machining of steel materials for gas and oil pipelines comprises a device body 1, a straightening frame 2 is fixedly mounted on the top of the device body 1, a plurality of first straightening rollers 3 and a plurality of second straightening rollers 4 are mounted inside the straightening frame 2, the first straightening rollers 3 and the second straightening rollers 4 are vertically distributed to each other, and a driving structure for driving the plurality of first straightening rollers 3 and the second straightening rollers 4 to rotate is mounted outside the straightening frame 2; a stress detection device 5 is mounted at one end of the straightening frame 2, the stress detection device 5 is a rectangular frame structure, and a plurality of first straightening rollers 3 and a plurality of second straightening rollers 4 are fixed on the inner wall of the stress detection device 5. It is connected with four evenly distributed fixing sleeves 9, and a fixing ring 8 is provided in the middle of the stress detection device 5. The other end of each fixing sleeve 9 away from the stress detection device 5 is fixedly connected to the outer wall of the fixing ring 8. The inner wall of each fixing sleeve 9 is slidably connected with a slider 13. The outer wall of the slider 13 close to the fixing ring 8 is fixedly connected with two sliding posts 11. The fixing ring 8 is provided with a sliding hole 31 that matches the sliding post 11. The inner wall of the sliding hole 31 is slidably connected to the outer wall of the sliding post 11. The end of the sliding post 11 away from the slider 13 is fixedly connected with a pressure plate 10. The pressure plate 10 is located on the fixing ring 8. On the inside, the outer sleeve of the sliding column 11 is provided with a return spring 12 for pushing the pressure plate 10 to return, the outer wall of the slider 13 is provided with a movable groove 14, the inner wall of the movable groove 14 is fixedly connected with a first movable fence 15, the inner wall of the fixed sleeve 9 is fixedly connected with a first fixed fence 16, and the outer wall of the first fixed fence 16 is in contact with the outer wall of the first movable fence 15; the secondary straightening frame 6 is installed at the end of the stress detection device 5 away from the straightening frame 2, and four evenly distributed electric push rods 17 are fixedly connected to the secondary straightening frame 6. The electric push rod 17 includes a drive seat 19 and an inner slide rod 20, which drives The outer wall of the moving seat 19 is fixedly connected to the fixed plate 23, and the driving seat 19 is fixedly connected to the inner wall of the secondary straightening frame 6 through the set fixed plate 23. The driving seat 19 can drive the inner slide rod 20 to move linearly. One end of the inner slide rod 20 is fixedly connected to the pressure roller 18, and the pressure roller 18 is located on the inner side of the secondary straightening frame 6. The outer wall of the inner slide rod 20 is fixedly connected to the second moving grid 22, and the inner wall of the secondary straightening frame 6 is fixedly connected to the second fixed grid 21 that cooperates with the second moving grid 22; and the pipe outlet device 7, the pipe outlet device 7 is installed at the end of the secondary straightening frame 6 away from the stress detection device 5.

[0034] When the present invention is in use, the steel pipe to be straightened is placed from one end of the straightening frame 2, and the multiple groups of first straightening rollers 3 and second straightening rollers 4 inside the straightening frame 2 rotate under the drive of the driving structure to compress the steel pipe, and the distance between the first straightening roller 3 and the second straightening roller 4 is the diameter of the steel pipe, so that the steel pipe is straightened under pressure, and the steel pipe that has undergone preliminary straightening passes through the stress detection device 5, the secondary straightening frame 6, and the middle of the pipe outlet device 7. If the steel pipe is bent, the bent part will press against the corresponding pressure plate 10 inside the stress detection device 5, thereby causing the slider 13 inside the fixed sleeve 9 to slide, causing the first moving grid 15 and the first fixed grid 16 to be misaligned, thereby detecting the bending amount of the steel pipe as Lw, wherein the capacitance between the moving and fixed grids changes according to a certain rule as their relative displacement, thereby detecting the bending amount, which belongs to the existing technology and will not be described in detail. Subsequently, the steel pipe is bent Part of it is displaced to the inside of the secondary straightening frame 6, and the inner sliding bar 20 corresponding to the pressure plate 10 that detects the bending amount is displaced toward the steel pipe and squeezes the steel pipe according to the detected bending amount. The squeezing amount is 1.5Lw to 2.5Lw, usually 1.5Lw. The squeezing amount can be adjusted according to the actual model of the steel pipe and the elasticity after the composite anti-corrosion material is added. The second moving fence 22 is installed on the outer wall of the inner sliding bar 20 on the side away from the pressure roller 18. When the protruding part of the inner sliding bar 20, that is, the pressure roller 18 can just touch the unbent steel pipe, the second moving fence 22 contacts the second fixed fence 21, and then the induced distance between the second moving fence 22 and the second fixed fence 21 is the squeezing amount. By applying a force greater than the stress but in the opposite direction to the bent pipe, the original stress is completely eliminated and the pipe is straightened, which is of great significance for the straightening of precision pipelines, and is low in cost and easy to operate.

[0035] In the above-mentioned straightening device for precision processing of steel for gas and oil pipelines, the driving structure includes a first motor 24 and a second motor 26. The outer wall of the straightening frame 2 is fixedly mounted with a first transmission box 25 and a second transmission frame 27. The first motor 24 drives multiple groups of first straightening rollers 3 to rotate through the first transmission box 25, and the second motor 26 drives multiple groups of second straightening rollers 4 to rotate through the second transmission frame 27.

[0036] In the above-mentioned straightening device for precise processing of steel for gas and oil pipelines, the pressure plate 10 includes an arc-shaped plate 32 and a baffle 33. The arc-shaped plate 32 is fixedly connected to the baffle 33 at one end close to the straightening frame 2. The setting of the baffle 33 enables the head of the steel pipe to slide along the baffle 33 to the inner side of the pressure plate 10 when the head of the steel pipe is bent, thereby preventing the head of the steel pipe from getting stuck.

[0037] In the above-mentioned straightening device for precise machining of steel materials for gas and oil pipelines, a plurality of fixed pulleys 34 are installed on the outer wall of the slider 13 . The arrangement of the fixed pulleys 34 can be used to reduce the friction between the slider 13 and the fixed sleeve 9 .

[0038] In the above-mentioned straightening device for precise processing of steel for gas and oil pipelines, the pipe outlet device 7 includes two fixed frames 35, which are symmetrically distributed with each other. One end of the fixed frame 35 is fixedly connected to the outer wall of the secondary straightening frame 6, and two parallel pipe outlet rollers 36 are rotatably connected between the two fixed frames 35. The pipe outlet rollers 36 are horizontally arranged. The arrangement of the pipe outlet rollers 36 is used to assist in supporting the steel pipe, so as to facilitate the electric push rod 17 to correct the steel pipe.

[0039] In the above-mentioned straightening device for precision processing of steel for gas and oil pipelines, the straightening frame 2 is fixedly connected to the end away from the stress detection device 5 with a pipe feeding device 37, and the inner wall of the pipe feeding device 37 is fixedly connected to two mutually parallel pipe feeding rollers 38, which are horizontally arranged. The two pipe feeding rollers 38 are driven by the first motor 24 and the first transmission box 25 to rotate, and two symmetrically distributed auxiliary rollers 39 are rotatably connected on both sides of the inside of the pipe feeding device 37. The auxiliary rollers 39 are vertically arranged, and the pipe feeding rollers 38 are used for feeding and bringing the steel pipe into the interior of the straightening frame 2 for straightening.

[0040] In the above-mentioned straightening device for precise processing of steel for gas and oil pipelines, a slag discharge channel 28 is provided on the inner wall of the device body 1. The upper end of the slag discharge channel 28 extends to the bottom of the straightening frame 2, and the lower end of the slag discharge channel 28 extends to the outside of the device body 1. The setting of the slag discharge channel 28 facilitates the discharge of dirt peeling off the surface of the steel pipe during straightening.

[0041] In the above-mentioned straightening device for precise processing of steel materials for gas and oil pipelines, a plurality of rollers 29 are fixedly mounted on the bottom of the device body 1 , and a control box 30 is fixedly connected to the top of the device body 1 .

[0042] The specific working principle and usage method of the present invention are explained in detail below: When in use, the steel pipe to be straightened is placed from one end of the straightening frame 2, and the multiple groups of first straightening rollers 3 and second straightening rollers 4 inside the straightening frame 2 rotate under the drive of the driving structure to compress the steel pipe, and the distance between the first straightening roller 3 and the second straightening roller 4 is the diameter of the steel pipe, so that the steel pipe is straightened under pressure, and the steel pipe that has undergone preliminary straightening passes through the stress detection device 5, the secondary straightening frame 6, and the middle of the pipe outlet device 7. If the steel pipe is bent, the bent part will press against the corresponding pressure plate 10 inside the stress detection device 5, thereby causing the slider 13 inside the fixed sleeve 9 to slide, causing the first movable grid 15 and the first fixed grid 16 to be misaligned, thereby detecting that the bending amount of the steel pipe is Lw, and then the bent part of the steel pipe moves to the second Inside the secondary straightening frame 6, the inner slide bar 20 moves toward the steel pipe and squeezes the steel pipe according to the detected bending amount. The squeezing amount is 1.5Lw to 2.5Lw, preferably 1.5Lw. The squeezing amount can be adjusted according to the actual model of the steel pipe and the elasticity after the composite anti-corrosion material. The second movable fence 22 is installed on the outer wall of the inner slide bar 20 away from the pressure roller 18. When the protruding part of the inner slide bar 20, that is, the pressure roller 18 can just touch the unbent steel pipe, the second movable fence 22 contacts the second fixed fence 21, and then the induced distance between the second movable fence 22 and the second fixed fence 21 is the squeezing amount. By applying a force greater than the stress but in the opposite direction to the bent pipe, the original stress is completely eliminated and the pipe is straightened, which is of great significance for the straightening of precision pipelines, and is low in cost and easy to operate.

[0043] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are common means well known to those skilled in the art.

[0044] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A straightening device for precision machining of steel materials for gas and oil pipelines, characterized in that: include: A device body (1), a straightening frame (2) is fixedly installed on the top of the device body (1), multiple groups of first straightening rollers (3) and multiple groups of second straightening rollers (4) are installed inside the straightening frame (2), the first straightening rollers (3) and the second straightening rollers (4) are vertically distributed to each other, and a driving structure for driving the multiple groups of first straightening rollers (3) and the second straightening rollers (4) to rotate is installed outside the straightening frame (2); A stress detection device (5) is installed at one end of the straightening frame (2). The stress detection device (5) is a rectangular frame structure. Four evenly distributed fixing sleeves (9) are fixedly connected to the inner wall of the stress detection device (5). A fixing ring (8) is provided in the middle of the stress detection device (5). The other end of each fixing sleeve (9) away from the stress detection device (5) is fixedly connected to the outer wall of the fixing ring (8). The inner wall of each fixing sleeve (9) is slidably connected to a slider (13). The outer wall of the slider (13) close to the fixing ring (8) is fixedly connected to two sliding columns (11). The fixing ring (8) is provided with a sliding column ( 11), the inner wall of the sliding hole (31) is slidably connected to the outer wall of the sliding column (11), the end of the sliding column (11) away from the slider (13) is fixedly connected to a pressure plate (10), the pressure plate (10) is located on the inner side of the fixed ring (8), the outer sleeve of the sliding column (11) is provided with a reset spring (12) for pushing the pressure plate (10) to reset, the outer wall of the slider (13) is provided with a movable groove (14), the inner wall of the movable groove (14) is fixedly connected to a first moving grid (15), the inner wall of the fixed sleeve (9) is fixedly connected to a first fixed grid (16), and the outer wall of the first fixed grid (16) is in contact with the outer wall of the first moving grid (15); A secondary straightening frame (6), wherein the secondary straightening frame (6) is installed at one end of the stress detection device (5) away from the straightening frame (2), and four evenly distributed electric push rods (17) are fixedly connected to the secondary straightening frame (6), and the electric push rods (17) include a driving seat (19) and an inner slide bar (20), and the outer wall of the driving seat (19) is fixedly connected to a fixed plate (23), and the driving seat (19) is fixedly connected to the inner wall of the secondary straightening frame (6) through the provided fixed plate (23), and the driving seat (19) can drive the inner slide bar (20) to move linearly, and one end of the inner slide bar (20) is fixedly connected to a pressure roller (18), and the pressure roller (18) is located on the inner side of the secondary straightening frame (6), and the outer wall of the inner slide bar (20) is fixedly connected to a second moving grid (22), and the inner wall of the secondary straightening frame (6) is fixedly connected to a second fixed grid (21) that matches the second moving grid (22); and A pipe outlet device (7) is installed on an end of the secondary straightening frame (6) away from the stress detection device (5).

2. The straightening device for precise machining of steel materials for gas and oil pipelines according to claim 1, characterized in that: The driving structure comprises a first motor (24) and a second motor (26); a first transmission box (25) and a second transmission frame (27) are fixedly mounted on the outer wall of the straightening frame (2); the first motor (24) drives the plurality of first straightening rollers (3) to rotate via the first transmission box (25); and the second motor (26) drives the plurality of second straightening rollers (4) to rotate via the second transmission frame (27).

3. The straightening device for precise machining of steel materials for gas and oil pipelines according to claim 1, characterized in that: The pressing plate (10) comprises an arc-shaped plate (32) and a baffle (33), and the baffle (33) is fixedly connected to one end of the arc-shaped plate (32) close to the straightening frame (2).

4. The straightening device for precise machining of steel materials for gas and oil pipelines according to claim 1, characterized in that: A plurality of fixed pulleys (34) are installed on the outer wall of the slider (13).

5. The straightening device for precise machining of steel materials for gas and oil pipelines according to claim 1, characterized in that: The pipe discharging device (7) comprises two fixed frames (35), the two fixed frames (35) are symmetrically distributed with each other, one end of the fixed frame (35) is fixedly connected to the outer wall of the secondary straightening frame (6), and two parallel pipe discharging rollers (36) are rotatably connected between the two fixed frames (35), and the pipe discharging rollers (36) are horizontally arranged.

6. The straightening device for precise machining of steel materials for gas and oil pipelines according to claim 2, characterized in that: One end of the straightening frame (2) away from the stress detection device (5) is fixedly connected to a pipe feeding device (37), and the inner wall of the pipe feeding device (37) is fixedly connected to two mutually parallel pipe feeding rollers (38), and the pipe feeding rollers (38) are arranged horizontally. The two pipe feeding rollers (38) are driven by a first motor (24) and a first transmission box (25) to rotate, and two symmetrically distributed auxiliary rollers (39) are rotatably connected on both sides of the interior of the pipe feeding device (37), and the auxiliary rollers (39) are arranged vertically.

7. The straightening device for precise machining of steel materials for gas and oil pipelines according to claim 1, characterized in that: A slag discharge channel (28) is provided on the inner wall of the device body (1), the upper end of the slag discharge channel (28) extends to the bottom of the straightening frame (2), and the lower end of the slag discharge channel (28) extends to the outside of the device body (1).

8. The straightening device for precise machining of steel materials for gas and oil pipelines according to claim 1, characterized in that: A plurality of rollers (29) are fixedly mounted on the bottom of the device body (1), and a control box (30) is fixedly connected to the top of the device body (1).

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