Pipe straightening device

Abstract

The invention relates to the technical field of pipe machining, in particular to a pipe straightening device which comprises a bottom plate, a supporting plate of a U-shaped structure is fixedly connected to the middle of the bottom plate, a transverse plate is fixedly connected to the middle of one side of the supporting plate, and a second hydraulic cylinder is fixedly connected to one end of the transverse plate. A stabilizing mechanism is installed at the end of a piston rod of the second hydraulic cylinder and comprises a vertical plate, the vertical plate is fixedly connected to the end of the piston rod of the second hydraulic cylinder, and a penetrating groove is formed in the middle of the vertical plate. The stabilizing column is detachably installed on the cross rod and can be conveniently replaced when different pipe diameters are straightened, the pin shaft is assembled on the positioning plate, the inserting rod is correspondingly assembled on the stabilizing column, and in the actual use process, rotation of the positioning plate can be effectively limited through a matching structure that the pin shaft penetrates through the positioning plate and is inserted into the inserting rod; and the rotation phenomenon of the stabilizing column can be further prevented by pre-limiting the mounting position of the inserting rod.

Description

Technical Field

[0001] This invention relates to the field of pipe processing arm technology, specifically a pipe straightening device. Background Technology

[0002] During the rolling, extrusion, transportation and storage of pipes, morphological deviations such as bending and warping are easily caused by external forces, temperature changes or internal stress release. If they are directly introduced into subsequent cutting, welding or assembly processes, it will lead to substandard workpiece dimensional accuracy, reduced connection sealing, and even product structural safety hazards. Therefore, straightening treatment is required to restore their straightness and roundness.

[0003] Patent publication number CN115722560A, published on March 3, 2023, discloses a device for stabilizing and straightening the inner hole of a seamless steel pipe. The device includes a base plate, U-shaped support frames symmetrically arranged on the front and rear sides of the upper end of the base plate, and two vertically symmetrical straightening mechanisms arranged at the center of the upper end of the base plate. A straightening space for straightening the seamless steel pipe is formed between the two straightening mechanisms. The lower straightening mechanism is fixed to the base plate, and the upper straightening mechanism is connected to the support frames on both sides via a lifting mechanism. An inner hole stabilizing mechanism for stabilizing the inner hole of the seamless steel pipe is connected to one side of the upper end of each of the two support frames. The inner hole stabilizing mechanism includes a T-shaped top plate fixed to one side of the upper end of each of the two support frames, with the top plate located away from the support frames. A baffle is connected to one end of the tube, with a threaded rod passing through its center. A stabilizing column, matching the inner diameter of the seamless steel pipe, is positioned on the side of the threaded rod closest to the straightening mechanism, extending to the center of the straightening space. The threaded rod, away from the straightening mechanism, passes through the baffle and moves laterally via a moving mechanism located on the outside of the baffle. However, this design still has significant shortcomings in practical applications: during operation, the threaded rod must first be adjusted via the moving mechanism to insert the stabilizing column from the inner hole stabilizing mechanism into the pipe. The stabilizing column provides support to the inner wall of the pipe to ensure its stability during straightening. However, in subsequent straightening operations, the pipe will deform under the force of the straightening mechanism. During this process, the inner diameter of the pipe... The wall continuously exerts a compressive force on the stabilizing column, which is directly connected to the threaded rod. This compressive force is simultaneously transmitted to the threaded rod, causing it to undergo unexpected axial displacement. Since the first bevel gear and the threaded rod are threadedly connected, this unexpected axial displacement forces the first bevel gear to rotate under non-design conditions. This results in the threaded connection between the two continuously bearing additional shear loads and frictional wear. Over time, this can easily cause damage to the threaded tooth surface, stripping, and other malfunctions. This not only prevents the stabilizing column from being accurately positioned, affecting straightening accuracy, but also interrupts the normal operation of the device, significantly increasing maintenance costs and downtime frequency. Furthermore, the direct connection between the stabilizing column and the threaded rod... When the straightening operation is underway, the pipe is deformed by the force of the straightening mechanism, and its inner wall continuously exerts a squeezing force on the stabilizing column. This squeezing force is simultaneously transmitted to the threaded rod, causing the threaded rod to produce an unexpected axial displacement. Since the threaded rod and the first bevel gear are threadedly connected, the axial displacement of the threaded rod will force the first bevel gear to produce a rotational tendency outside of its design conditions. This rotational tendency will indirectly drive the stabilizing column connected to it to rotate through the threaded transmission. Since the stabilizing column is in close contact with the inner wall of the pipe during operation, the rotation will increase the contact resistance between the two, making it difficult to pull out the stabilizing column, significantly increasing the operating load of the moving motor, and affecting the service life of the motor and the operational stability of the device. Summary of the Invention

[0004] To address the problems in the prior art, the present invention provides a pipe straightening device.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a pipe straightening device, including a base plate, a U-shaped support plate fixedly connected to the middle of the base plate, a first hydraulic cylinder fixedly connected to the middle of the support plate, a top plate fixedly connected to the piston rod end of the first hydraulic cylinder, a straightening mechanism installed at the lower end of the top plate and the upper end of the base plate, and multiple tensioning rollers installed at the lower end of the top plate and the upper end of the base plate. A horizontal plate is fixedly connected to the middle of one side of the support plate. A second hydraulic cylinder is fixedly connected to one end of the horizontal plate. A stabilizing mechanism is installed at the piston rod end of the second hydraulic cylinder. The stabilizing mechanism includes a vertical plate, which is fixedly connected to the piston rod end of the second hydraulic cylinder. A through groove is opened in the middle of the vertical plate. A movable plate is fixedly connected to the lower end of one side of the vertical plate through a third hydraulic cylinder. A horizontal bar is fixedly connected to one side of the movable plate. A threaded stabilizing column is sleeved at the end of the horizontal bar. A spray head is fixedly connected to one side of the stabilizing column, and an insert rod is fixedly connected to the middle of the other side. The insert rod is inserted into the horizontal bar. A rotatably connected positioning plate is sleeved in the middle of the horizontal bar. A carrier plate is fixedly connected to the upper end of the positioning plate. A slidingly connected pin is vertically passed through the middle of the upper end of the carrier plate. A liquid storage tank is fixedly connected to the other side of the movable plate. A water pump is installed inside the liquid storage tank. The water pump and the connecting pipe are connected to the insert rod.

[0006] Specifically, the straightening mechanism includes a mounting plate and a straightening motor. There are two mounting plates. The lower mounting plate and the straightening motor are both fixedly connected to the upper end of the base plate, and the upper mounting plate and the straightening motor are both fixedly connected to the lower end of the top plate. Multiple straightening rollers are rotatably connected between the mounting plates at equal intervals. A straightening groove is opened in the middle of the straightening roller. One end of each straightening roller passes through the corresponding mounting plate and is fixedly connected to a driven sprocket. A drive sprocket is fixedly connected to the output end of the straightening motor. The drive sprocket is connected to the multiple corresponding driven sprockets through a chain. The wheel body of the tensioning wheel abuts against the corresponding chain.

[0007] Specifically, positioning rods are fixedly connected to the four corners of the upper end of the base plate. The upper end of the positioning rod passes through and is slidably connected to the top plate. A buffer spring is sleeved on the outside of the positioning rod. The upper and lower ends of the buffer spring are fixedly connected to the lower end of the top plate and the upper end of the base plate, respectively.

[0008] Specifically, a side plate is abutting and connected to the lower end of one side of the upright plate. The side plate is fixedly connected to the base plate by a connecting plate. A sliding hole is opened in the middle of the side plate, and a sliding rod is slidably connected through the sliding hole. One end of the sliding rod is fixedly connected to the upright plate.

[0009] Specifically, two sliding grooves are symmetrically opened on one side of the upright plate about the through groove. One side of the baffle abuts against the outside of the corresponding sliding groove and is fixedly connected to a slider, which is slidably connected in the corresponding sliding groove.

[0010] Specifically, a support plate is fixedly connected to the lower end of the upright plate, and a through groove is opened in the middle of the support plate. The lower end of the movable plate is slidably connected in the through groove.

[0011] Specifically, a positioning block is fixedly connected to the outside of one side opening of the through groove, and the upper end of the positioning block abuts against the lower end of the positioning plate.

[0012] Specifically, a double-headed motor is fixedly connected to the upper end of one side of the upright plate. A screw is fixedly connected to each of the two output ends of the double-headed motor. A threaded plate with a threaded connection is sleeved on the screw. A baffle is fixedly connected to the lower end of the threaded plate. A rubber liner is fixedly connected to the side wall of the baffle.

[0013] Specifically, the lower end of the pin passes through the positioning plate and the side wall of the crossbar in sequence and is inserted into the insert rod. A collar and a fixing spring are sleeved on the outer side of the upper end of the pin. The collar and the pin are fixedly connected and located at the lower end of the fixing spring. The upper and lower ends of the fixing spring are respectively fixedly connected to the inner wall of the carrier plate and the upper end of the collar. A pull plate is fixedly connected to the upper end of the pin.

[0014] Specifically, a cleaning sleeve is fitted onto the crossbar, and the cleaning sleeve abuts against the stabilizing column.

[0015] The beneficial effects of this invention are: (1) The stabilizing column of the present invention can be detachably installed on the crossbar, which is convenient to replace when straightening different pipe diameters. The positioning plate is equipped with a pin, and the stabilizing column is equipped with a corresponding insertion rod. In actual use, the rotation of the positioning plate can be effectively restricted by the cooperation structure of the pin passing through the positioning plate and inserting the insertion rod. In addition, by pre-limiting the installation position of the insertion rod, the rotation of the stabilizing column can be further prevented.

[0016] (2) The present invention installs a spray head structure on the stabilizing column. When the stabilizing column is inserted into the pipe, the spray head can accurately spray lubricant onto the inner wall of the pipe, optimizing the rigid contact between the stabilizing column and the inner wall of the pipe into a flexible contact with lubrication buffer. On the one hand, it can effectively avoid the stabilizing column from causing scratch damage to the inner wall of the pipe, and on the other hand, it can significantly reduce the frictional resistance of the contact surface, making it easier for the stabilizing column to be smoothly pulled out of the pipe after the straightening operation is completed, thereby reducing the operating load of the third hydraulic cylinder.

[0017] (3) By using the contact limit between the positioning plate and the vertical plate, the lateral force generated during the straightening operation can be transmitted to the vertical plate through the positioning plate, avoiding the direct transmission of the force to the connection between the third hydraulic cylinder and the moving plate. Through this force diversion and load optimization, the connection between the third hydraulic cylinder and the moving plate can completely avoid the effect of additional thrust, fundamentally solving the problem of damage to the connection due to force, significantly improving the overall structural stability and service life of the device, and reducing maintenance costs and downtime caused by component damage. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a cross-sectional view of the present invention; Figure 2 This is a cross-sectional view of the straightening mechanism of the present invention; Figure 3 This is a schematic diagram of the stabilizing mechanism structure of the present invention; Figure 4 for Figure 3 Enlarged view of the area at point A in the middle; Figure 5 This is a cross-sectional view of the stabilizing mechanism of the present invention; Figure 6 This is a schematic diagram of the external structure of the present invention; Figure 7 for Figure 5 Enlarged view of the area at point B; Figure 8 This is a schematic diagram of the tensioning wheel structure of the present invention.

[0020] In the diagram: 1. Base plate; 2. Support plate; 3. First hydraulic cylinder; 4. Top plate; 5. Straightening mechanism; 51. Mounting plate; 52. Straightening motor; 53. Straightening roller; 54. Driven sprocket; 55. Drive sprocket; 56. Chain; 6. Horizontal plate; 7. Second hydraulic cylinder; 8. Stabilizing mechanism; 81. Vertical plate; 82. Through slot; 83. Third hydraulic cylinder; 84. Moving plate; 85. Crossbar; 86. Positioning plate; 87. Stabilizing column; 88. Positioning block; 89. Side plate; 810. Slide bar; 811. Connector 812. Plate; 813. Slide groove; 814. Double-headed motor; 815. Screw; 816. Threaded plate; 817. Baffle; 818. Slider; 819. Rubber liner; 820. Support plate; 821. Through groove; 822. Insert rod; 823. Carrier plate; 824. Pin; 825. Collar; 826. Fixing spring; 827. Pull plate; 828. Liquid storage tank; 829. Water pump; 830. Connecting pipe; 831. Spray head; 832. Cleaning sleeve; 9. Positioning rod; 10. Buffer spring; 11. Tensioning wheel. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] like Figures 1-8 As shown, the present invention provides the following technical solution: Example 1: A pipe straightening device includes a base plate 1, a U-shaped support plate 2 fixedly connected to the middle of the base plate 1, a first hydraulic cylinder 3 fixedly connected to the middle of the support plate 2, a top plate 4 fixedly connected to the piston rod end of the first hydraulic cylinder 3, a straightening mechanism 5 installed at the lower end of the top plate 4 and the upper end of the base plate 1, a plurality of tensioning wheels 11 installed at the lower end of the top plate 4 and the upper end of the base plate 1, a positioning rod 9 fixedly connected at each of the four corners of the upper end of the base plate 1, the upper end of the positioning rod 9 penetrating and slidably connected to the top plate 4, a buffer spring 10 sleeved on the outer side of the positioning rod 9, and the upper and lower ends of the buffer spring 10 fixedly connected to the lower end of the top plate 4 and the upper end of the base plate 1, respectively. The straightening mechanism 5 includes a mounting plate 51 and a straightening motor 52. There are two mounting plates 51. The lower mounting plate 51 and the straightening motor 52 are both fixedly connected to the upper end of the base plate 1, and the upper mounting plate 51 and the straightening motor 52 are both fixedly connected to the lower end of the top plate 4. Multiple straightening rollers 53 are rotatably connected between the mounting plates 51 at equal intervals. A straightening groove is opened in the middle of the straightening roller 53. One end of each straightening roller 53 passes through the corresponding mounting plate 51 and is fixedly connected to a driven sprocket 54. A drive sprocket 55 is fixedly connected to the output end of the straightening motor 52. The drive sprocket 55 is connected to the multiple driven sprockets 54 through a chain 56. The wheel body of the tension wheel 11 abuts against the corresponding chain 56.

[0023] In use, the power is turned on, and the first hydraulic cylinder 3 is started by controlling the control panel. The top plate 4 slides up and down along the positioning rod 9 to adjust the distance between the upper and lower straightening mechanisms 5 to match the pipe diameter. The buffer spring 10 buffers the movement impact synchronously. At the same time, the straightening motor 52 is controlled to run by the control panel. The straightening motor 52 drives the driven sprocket 55 and chain 56 to drive the driven sprocket 54 and straightening roller 53 to rotate synchronously. When the pipe is fed between the upper and lower straightening rollers 53, the control panel maintains the speed of the straightening motor 52 to be stable, so that the straightening roller 53 straightens the bent parts by squeezing force during the pipe transmission process. The power supply continuously provides stable power to the first hydraulic cylinder 3 and the straightening motor 52 to ensure that all components operate in coordination.

[0024] Example 2: The technical solution of this example, which differs from Example 1, includes: a horizontal plate 6 fixedly connected to the middle of one side of the support plate 2; a second hydraulic cylinder 7 fixedly connected to one end of the horizontal plate 6; a stabilizing mechanism 8 installed at the piston rod end of the second hydraulic cylinder 7; the stabilizing mechanism 8 includes a vertical plate 81 fixedly connected to the piston rod end of the second hydraulic cylinder 7; a through groove 82 is provided in the middle of the vertical plate 81; a moving plate 84 is fixedly connected to the lower end of one side of the vertical plate 81 via a third hydraulic cylinder 83; a horizontal rod 85 is fixedly connected to one side of the moving plate 84; a threaded stabilizing column 87 is sleeved at the end of the horizontal rod 85; the stabilizing column... A spray head 830 is fixedly connected to one side of the crossbar 85, and an insertion rod 821 is fixedly connected to the middle of the other side. The insertion rod 821 is inserted into the crossbar 85. A rotatably connected positioning plate 86 is sleeved in the middle of the crossbar 85. A carrier plate 822 is fixedly connected to the upper end of the positioning plate 86. A slidingly connected pin 823 passes vertically through the middle of the upper end of the carrier plate 822. The lower end of the pin 823 passes through the positioning plate 86 and the side wall of the crossbar 85 and is inserted into the insertion rod 821. A collar 824 and a fixing spring 825 are sleeved on the outer side of the upper end of the pin 823. The collar 824 and the pin 823 are fixedly connected and located at the lower end of the fixing spring 825. The upper and lower ends of the fixed spring 825 are respectively fixedly connected to the inner wall of the carrier plate 822 and the upper end of the collar 824. The upper end of the pin 823 is fixedly connected to the pull plate 826. The other side of the moving plate 84 is fixedly connected to the liquid storage tank 827. The liquid storage tank 827 is equipped with a water pump 828. The water pump 828, the connecting pipe 829 and the insertion rod 821 are connected. A cleaning sleeve 831 is fitted on the crossbar 85. The cleaning sleeve 831 abuts against the stabilizing column 87. A double-headed motor 813 is fixedly connected to the upper end of one side of the upright plate 81. Screws 814 are fixedly connected to both output ends of the double-headed motor 813. A threaded plate 815 with a threaded connection is fitted on the upper part. A baffle 816 is fixedly connected to the lower end of the threaded plate 815. A rubber liner 818 is fixedly connected to the side wall of the baffle 816. A side plate 89 is abutted to the lower end of one side of the upright plate 81. The side plate 89 is fixedly connected to the bottom plate 1 through a connecting plate 811. A sliding hole is opened in the middle of the side plate 89 and a sliding rod 810 is slidably connected through the sliding hole. One end of the sliding rod 810 is fixedly connected to the upright plate 81. A support plate 819 is fixedly connected to the lower end of the upright plate 81. A through groove 820 is opened in the middle of the support plate 819. The lower end of the moving plate 84 is slidably connected in the through groove 820.

[0025] Specifically, two sliding grooves 812 are symmetrically opened on one side of the upright plate 81 about the through groove 82. One side of the baffle 816 abuts against the outside of the corresponding sliding groove 812 and is fixedly connected to a slider 817. The slider 817 is slidably connected in the corresponding sliding groove 812, which can fix the movement trajectory of the baffle 816 and support the baffle 816 and the threaded plate 815, reducing the load on the screw 814.

[0026] Specifically, a positioning block 88 is fixedly connected to the outer side of one side opening of the through groove 82. The upper end of the positioning block 88 abuts against the lower end of the positioning plate 86, which can be used to fix the rotation angle of the positioning plate 86. When the stabilizing column 87 is pulled out of the pipe, the positioning plate 86 and the through groove 82 can be quickly aligned.

[0027] In use, the control logic of the stabilizing mechanism 8 is integrated through the power supply and control panel. The power supply provides power to the newly added second hydraulic cylinder 7, dual-head motor 813, third hydraulic cylinder 83, and existing components. The control panel first links the second hydraulic cylinder 7 to push the upright plate 81 along the slide rod 810 to the working position. The slide rod 810 cooperates with the side plate 89 to ensure the stable movement of the upright plate 81. Then, the dual-head motor 813 is started, and the screw 814 drives the baffle 816 to laterally clamp the pipe to assist in alignment. The threads of the two screws 814 are opposite, ensuring that when the two screws 814 rotate in the same direction, the two baffles 816 move towards each other or in opposite directions. At this time, the slider 817 slides in the groove 812 to prevent the baffles 816 and the threaded plate 815 from rotating with the screws 814 and to support the baffles. The baffle 816 and threaded plate 815 ensure that the pipe will not shift. A suitable stabilizing column 87 is selected based on the inner diameter of the pipe and threaded onto the crossbar 85. At this time, the pin 823, under the elastic force of the fixing spring 825, abuts against the outer wall of the insertion rod 821 on the side of the stabilizing column 87. Then, the third hydraulic cylinder 83 is controlled to pull the moving plate 84 to slide on the support plate 819. The moving plate 84 is slidably connected in the through groove 820, ensuring the stability of the moving plate 84 during movement. The moving plate 84 drives the crossbar 85 to move closer to the pipe and pushes the stabilizing column 87 into the pipe for support, preventing collapse during pipe straightening. During the insertion of the stabilizing column 87 into the pipe, the water pump 828... Connecting pipe 829 delivers lubricant from storage tank 827 to spray head 830 via insert rod 821 and stabilizing column 87. The lubricant is then sprayed onto the inner wall of the pipe by spray head 830, reducing friction between stabilizing column 87 and the pipe and preventing stabilizing column 87 from scratching the inner wall. Pulling plate 826 pulls pin 823, removing it from the side wall of crossbar 85, rotating positioning plate 86 from a vertical to a horizontal position. Positioning plate 86 rests on the upper end of positioning block 88 and abuts against vertical plate 81. Pin 823, pushed by fixing spring 825, passes through the side wall of crossbar 85 and inserts into a pre-set hole on insert rod 821, preventing positioning plate 86 from rotating. During the straightening stage, control panel synchronously coordinates straightening motor 52 and stabilizing machine. When the pipe is compressed and a lateral force is generated, the force applied to the stabilizing column 87 is transmitted to the vertical plate 81 via the crossbar 85 and the positioning plate 86, preventing the moving plate 84 from being subjected to lateral thrust and protecting the connection between the moving plate 84 and the third hydraulic cylinder 83. At this time, the sliding rod 810 will pull the lower end of the vertical plate 81, which can reduce the load on the connection between the vertical plate 81 and the second hydraulic cylinder 7. Furthermore, the pin 823 limits the position of the insertion rod 821, preventing the stabilizing column 87 from rotating. The control panel monitors the current feedback of each component in real time to ensure stable power output and avoid overload damage to the equipment. After the pipe is straightened, the positioning plate 86 is rotated in the opposite direction until it abuts against the outer wall of the positioning block 88. At this time, the positioning plate 86 and the through groove 82 are aligned.The control panel drives the third hydraulic cylinder 83 to push the moving plate 84. Because of the lubricant on the inner wall of the pipe, the stabilizing column 87 can be easily pulled out of the pipe, while the cleaning sleeve 831 scrapes away excess lubricant from the inner wall of the pipe.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pipe straightening device, comprising a base plate (1), a support plate (2) with a U-shaped structure fixedly connected to the middle of the base plate (1), a first hydraulic cylinder (3) fixedly connected to the middle of the support plate (2), a top plate (4) fixedly connected to the piston rod end of the first hydraulic cylinder (3), a straightening mechanism (5) installed at the lower end of the top plate (4) and the upper end of the base plate (1), and a plurality of tensioning wheels (11) installed at the lower end of the top plate (4) and the upper end of the base plate (1). Its features are: A horizontal plate (6) is fixedly connected to the middle of one side of the support plate (2). A second hydraulic cylinder (7) is fixedly connected to one end of the horizontal plate (6). A stabilizing mechanism (8) is installed at the piston rod end of the second hydraulic cylinder (7). The stabilizing mechanism (8) includes a vertical plate (81). The vertical plate (81) is fixedly connected to the piston rod end of the second hydraulic cylinder (7). A through groove (82) is opened in the middle of the vertical plate (81). A moving plate (84) is fixedly connected to the lower end of one side of the vertical plate (81) through a third hydraulic cylinder (83). A horizontal bar (85) is fixedly connected to one side of the moving plate (84). A threaded stabilizing column (87) is sleeved at the end of the horizontal bar (85). The stabilizer (87) has a spray head (830) fixedly connected to one side and a plug (821) fixedly connected to the middle of the other side. The plug (821) is inserted into the crossbar (85). The middle of the crossbar (85) is fitted with a rotatably connected positioning plate (86). The upper end of the positioning plate (86) is fixedly connected to a carrier plate (822). The middle of the upper end of the carrier plate (822) is vertically connected to a slidingly connected pin (823). The other side of the moving plate (84) is fixedly connected to a liquid storage tank (827). A water pump (828) is installed inside the liquid storage tank (827). The water pump (828) and the connecting pipe (829) are connected to the plug (821).

2. The pipe straightening device according to claim 1, characterized in that: The straightening mechanism (5) includes a mounting plate (51) and a straightening motor (52). There are two mounting plates (51). The mounting plate (51) located below and the straightening motor (52) are both fixedly connected to the upper end of the base plate (1). The mounting plate (51) located above and the straightening motor (52) are both fixedly connected to the lower end of the top plate (4). Multiple straightening rollers (53) are rotatably connected between the mounting plates (51) at equal intervals. A straightening groove is opened in the middle of the straightening roller (53). One end of each straightening roller (53) passes through the corresponding mounting plate (51) and is fixedly connected to a driven sprocket (54). A drive sprocket (55) is fixedly connected to the output end of the straightening motor (52). The drive sprocket (55) is connected to the multiple driven sprockets (54) through a chain (56). The wheel body of the tension wheel (11) abuts against the corresponding chain (56).

3. The pipe straightening device according to claim 1, characterized in that: Positioning rods (9) are fixedly connected to the four corners of the upper end of the base plate (1). The upper end of the positioning rods (9) passes through and is slidably connected to the top plate (4). A buffer spring (10) is sleeved on the outside of the positioning rods (9). The upper and lower ends of the buffer springs (10) are fixedly connected to the lower end of the top plate (4) and the upper end of the base plate (1), respectively.

4. The pipe straightening device according to claim 1, characterized in that: The lower end of one side of the upright plate (81) is connected to a side plate (89), which is fixedly connected to the base plate (1) by a connecting plate (811). A sliding hole is provided in the middle of the side plate (89), and a sliding rod (810) is slidably connected through the sliding hole. One end of the sliding rod (810) is fixedly connected to the upright plate (81).

5. A pipe straightening device according to claim 1, characterized in that: Two sliding grooves (812) are symmetrically opened on one side of the upright plate (81) about the through groove (82). One side of the baffle (816) abuts against the outside of the corresponding sliding groove (812) and is fixedly connected to a slider (817). The slider (817) is slidably connected in the corresponding sliding groove (812).

6. A pipe straightening device according to claim 1, characterized in that: The lower end of the upright plate (81) is fixedly connected to a support plate (819), and a through groove (820) is provided in the middle of the support plate (819). The lower end of the movable plate (84) is slidably connected in the through groove (820).

7. A pipe straightening device according to claim 1, characterized in that: A positioning block (88) is fixedly connected to the outer side of one side opening of the through groove (82), and the upper end of the positioning block (88) abuts against the lower end of the positioning plate (86).

8. A pipe straightening device according to claim 1, characterized in that: A double-headed motor (813) is fixedly connected to the upper end of one side of the upright plate (81). A screw (814) is fixedly connected to each of the two output ends of the double-headed motor (813). A threaded plate (815) with a threaded connection is sleeved on the screw (814). A baffle (816) is fixedly connected to the lower end of the threaded plate (815). A rubber liner (818) is fixedly connected to the side wall of the baffle (816).

9. A pipe straightening device according to claim 1, characterized in that: The lower end of the pin (823) passes through the side wall of the positioning plate (86) and the crossbar (85) in sequence and is inserted into the insert rod (821). The upper end of the pin (823) is fitted with a collar (824) and a fixing spring (825). The collar (824) and the pin (823) are fixedly connected and located at the lower end of the fixing spring (825). The upper and lower ends of the fixing spring (825) are fixedly connected to the inner wall of the carrier plate (822) and the upper end of the collar (824), respectively. The upper end of the pin (823) is fixedly connected with a pull plate (826).

10. A pipe straightening device according to claim 1, characterized in that: A cleaning sleeve (831) is fitted on the crossbar (85), and the cleaning sleeve (831) abuts against the stabilizing column (87).

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