Waste oil pipe hot rolling device and using method thereof

Abstract

The invention belongs to the technical field of metal hot rolling equipment, and particularly relates to a waste oil pipe hot rolling device and a using method thereof. The pipe bundling machine further comprises a straightening and feeding assembly, and the straightening and feeding assembly is installed on the pipe bundling machine body and used for heating oil pipes in the feeding process. According to the waste oil pipe bundling machine, the elastic core rod is adopted to be matched with the feeding push rod, after the waste oil pipe and the elastic core rod are combined, the waste oil pipe is pushed to move in the direction of the pipe bundling machine body, and in the movement path of the waste oil pipe, the waste oil pipe can be conveniently and rapidly bundled. The waste oil pipe is straightened by changing the size of the straightening channel, so that the bending degree of the waste oil pipe is low, and the convenience of combination of the waste oil pipe and the pipe binding machine body is enhanced.

Description

Technical Field

[0001] The invention belongs to the technical field of metal hot rolling equipment, in particular to a waste oil pipe hot rolling device and a use method thereof. Background Art

[0002] After long-term use, oil pipes are often discarded due to various factors such as surface corrosion, wear, and overall bending. In order to enhance the recycling value of such discarded oil pipes, they are usually evaluated. For oil pipes with damage within a certain range, hot rolling repair technology is adopted to effectively increase the recycling value of discarded oil pipes.

[0003] In the hot rolling process of waste oil pipes, after being cleaned, the waste oil pipes are heated to the metal phase transition temperature, and then subjected to multi-roll rolling operations on the heated oil pipes through a three-roll rolling mill, so that the oil pipe material undergoes plastic deformation, the oil pipe metal material flows, the metallographic structure is improved, the oil pipe grains are refined, and metal fatigue is eliminated. At the same time, the oil pipe repair process is combined to repair the oil pipes during rolling, improve the mechanical properties of the oil pipes, and make the various properties of the modified oil pipes meet the performance index requirements of the finished oil pipes, thereby realizing the regeneration of waste oil pipes and enhancing the recycling effect of waste oil pipes.

[0004] However, in actual application, it was found that in the related art, when hot-rolling waste oil pipes, the oil pipes are mostly straightened after the hot rolling operation to make the hot-rolled oil pipes meet the performance requirements of the finished oil pipes. However, on the one hand, due to the certain degree of deformation, bending and other defects of the waste oil pipes themselves, when the waste oil pipes are running in the hot rolling mill, not only the transportation efficiency and stability of the waste oil pipes are poor, but also when the waste oil pipes are bent to a large extent, it will be difficult for the waste oil pipes to move into the gap between the heating coils and the hot rolling mill rollers, which is inconvenient to heat and hot-roll the waste oil pipes. In view of this, the present invention proposes a waste oil pipe hot rolling device and a method of use thereof to solve the above technical problems.

[0005] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention proposes a waste oil pipe hot rolling device and a method for using the same.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: the waste oil pipe hot rolling device of the present invention comprises a pipe binding machine body and an induction heating coil, wherein the induction heating coil is installed on one side of the pipe binding machine body and is used to induction heat the oil pipe;

[0008] It also includes a straightening and loading assembly, which is installed on the pipe tying machine body and is used to heat the oil pipe during the loading process;

[0009] The straightening and feeding assembly includes a feeding platform, which is installed on the pipe tying machine body and corresponds to the input port of the pipe tying machine body;

[0010] A feeding push rod, which is fixedly mounted on the feeding platform and is used to push the oil pipe toward the input port of the pipe binding machine;

[0011] An elastic core rod, the elastic core rod being fixedly mounted on the end of the feeding push rod, the diameter of the elastic core rod being smaller than the diameter of the waste oil pipe;

[0012] A straightening channel is provided on the feeding platform and is used to straighten the oil pipe. The width of the straightening channel near the feeding push rod is greater than the width of the straightening channel near the pipe binding machine body.

[0013] A convenient adjustment component is provided, which is used to adjust the position of the induction heating coil and the diameter of the straightening channel.

[0014] Preferably, the straightening and feeding assembly also includes a top plate, which is installed above the straightening channel. The width of the top plate is the same as the minimum width of the straightening channel. The top plate is tilted, and the end of the top plate close to the feeding push rod is higher than the end of the top plate close to the pipe tying machine body.

[0015] Preferably, the convenient adjustment assembly includes two guide plates, the two guide plates form a Y-shaped structure, and the gap between the two guide plates forms a straightening channel;

[0016] An adjustment frame, the adjustment frame is fixedly mounted on the loading platform, a plurality of sliding grooves are provided on the adjustment frame, the guide plate extends into the sliding grooves, and the guide plate is slidably connected to the adjustment frame;

[0017] An adjusting screw is rotatably installed in the sliding groove, and the adjusting screw and the guide plate are spirally transmitted.

[0018] Preferably, the convenient adjustment component further includes a lifting screw, the lifting screw is rotatably mounted on the top plate, the lifting screw extends to the adjustment frame, and the lifting screw is threadedly connected to the adjustment frame.

[0019] Preferably, rollers evenly distributed are rotatably mounted on the top plate and the guide plate, and the top plate and the guide plate are in rolling contact with the oil pipe via the rollers.

[0020] Preferably, the convenient adjustment component further comprises a mounting bracket, the mounting bracket being fixedly mounted on the loading platform, and the mounting bracket being provided with a symmetrically designed offset slot;

[0021] A support spring is fixedly installed in the offset groove with a symmetrically designed support spring. The upper and lower ends of the induction heating coil extend into the offset groove and are fixedly connected to the support spring.

[0022] Preferably, the mounting bracket is located on a side of the adjustment bracket away from the pipe tying machine body.

[0023] Preferably, evenly distributed telescopic rods are fixedly installed inside the induction heating coil, rollers are rotatably connected to the telescopic rods, and the telescopic rods and rollers are both made of high-temperature resistant insulating material.

[0024] Preferably, the telescopic rod and the roller are both made of high heat-resistance material, and the telescopic rod is a pneumatic telescopic rod.

[0025] A method for using a waste oil pipe hot rolling device, the method comprising the following steps:

[0026] S1: After cleaning, the waste oil pipes that are damaged, bent, or deformed to the degree that meets the recycling standards are transported to the loading platform. The loading push rod is activated, and its output end is inserted into the inner cavity of the waste oil pipe, and pushes the waste oil pipe toward the pipe binding machine;

[0027] S2: The waste oil pipe extends into the induction heating coil and elastically contacts the induction heating coil through rollers and other structures. Under the action of induction heating, the temperature of the waste oil pipe rises to the metal phase transition temperature;

[0028] S3: As the waste oil pipe gradually enters the straightening channel, it is restricted by the guide plate and the top plate, causing the waste oil pipe to undergo plastic deformation, thereby achieving preliminary straightening of the waste oil pipe;

[0029] S4: The waste oil pipe then enters the pipe-tying machine body. Under the extrusion of the rollers, the oil pipe undergoes plastic deformation again, and finally the hot rolling operation of the waste oil pipe is completed.

[0030] The beneficial effects of the present invention are as follows:

[0031] 1. The waste oil pipe hot rolling device and the method of using the same described in the present invention use an elastic core rod in combination with a feeding push rod to combine the waste oil pipe with the elastic core rod, and then push it toward the pipe-tying machine body. In the movement path of the waste oil pipe, the waste oil pipe is straightened by changing the size of the straightening channel, so that the bending degree of the waste oil pipe is lower, thereby enhancing the simplicity of combining the waste oil pipe with the pipe-tying machine body.

[0032] 2. The waste oil pipe hot rolling device and the use method thereof described in the present invention, by providing a mounting frame and an offset groove, when the end of the waste oil pipe is inserted into the induction heating coil, when the waste oil pipe is bent or deformed, the waste oil pipe exerts a pushing effect on the induction heating coil, causing the induction heating coil to squeeze the support spring and then slide in the offset groove. Therefore, during the transportation process of the oil pipe, the induction heating coil can always maintain connection with the oil pipe by offset sliding, thereby facilitating induction heating of the oil pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below with reference to the accompanying drawings.

[0034] Figure 1 is a perspective view of the waste oil pipe hot rolling device of the present invention;

[0035] Figure 2 This is a partial structural perspective view of the waste oil pipe hot rolling device of the present invention;

[0036] Figure 3 This is a three-dimensional diagram of the assembly of the adjustment frame, guide plate and top plate;

[0037] Figure 4 It is a three-dimensional diagram of the guide plate and the top plate;

[0038] Figure 5 is a partial cross-sectional view of the adjustment frame;

[0039] Figure 6 This is a three-dimensional diagram of the assembly of the mounting frame and the induction heating coil;

[0040] Figure 7 yes Figure 6 A partial enlarged view of point A in the middle;

[0041] Figure 8 This is a method flow chart of a method for using the waste oil pipe hot rolling device of the present invention;

[0042] In the figure: 1. Pipe tying machine body; 11. Loading platform; 12. Loading push rod; 13. Elastic core rod; 2. Straightening channel; 21. Top plate; 22. Guide plate; 23. Adjustment frame; 24. Sliding groove; 25. Adjustment screw; 26. Lifting screw; 27. Roller; 3. Mounting frame; 31. Offset groove; 32. Support spring; 4. Telescopic rod; 41. Roller; 5. Induction heating coil. DETAILED DESCRIPTION

[0043] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0044] like Figures 1 to 8As shown, the waste oil pipe hot rolling device of the present invention includes a pipe-binding machine body 1 and an induction heating coil 5. The induction heating coil 5 is installed on one side of the pipe-binding machine body 1 and is used to induction heat the oil pipe.

[0045] It also includes a straightening and loading assembly, which is installed on the pipe tying machine body 1 and is used to heat the oil pipe during the loading process;

[0046] The straightening and feeding assembly includes a feeding platform 11, and the feeding platform 11 is installed on the pipe tying machine body 1, and the feeding platform 11 corresponds to the input port of the pipe tying machine body 1;

[0047] A feeding push rod 12 is fixedly mounted on the feeding platform 11 and is used to push the oil pipe toward the input port of the pipe binding machine;

[0048] An elastic core rod 13, which is fixedly mounted on the end of the feeding push rod 12, and the diameter of the elastic core rod 13 is smaller than the diameter of the waste oil pipe;

[0049] A straightening channel 2 is provided on the loading platform 11 and is used to straighten the oil pipe. The width of the straightening channel 2 near the loading push rod 12 is greater than the width of the straightening channel 2 near the pipe-tying machine body 1.

[0050] A convenient adjustment component, which is used to adjust the position of the induction heating coil 5 and the diameter of the straightening channel 2;

[0051] In the hot rolling operation of waste oil pipes, before hot rolling, due to the large length of the waste oil pipes, when the oil pipes are deformed, their axis is in a bent state, and the oil pipes are in an arc shape as a whole. At this time, the transportation of the oil pipes is more difficult, and during the straight transportation of the oil pipes, when the oil pipes move toward the pipe-binding machine and the induction heating coil 5, it is difficult to align them. Therefore, by providing a straightening and feeding assembly, the oil pipes are straightened by the straightening and feeding assembly when they are fed, and the positions of the induction heating coil 5 and the straightening channel 2 are adjusted in conjunction with the convenient adjustment assembly, thereby making the feeding of the oil pipes more convenient.

[0052] The scraper 12 is then pushed into the feed tube 11 and the scraper 13 is pulled out of the feed tube 12 so that the scraper 12 can be put into the feed tube 11.

[0053] The present invention adopts an elastic core rod 13 in conjunction with a feeding push rod 12. After the waste oil pipe is combined with the elastic core rod 13, it is pushed to move toward the pipe tying machine body 1. In the movement path of the waste oil pipe, the waste oil pipe is straightened by changing the size of the straightening channel 2, so that the bending degree of the waste oil pipe is lower, thereby enhancing the simplicity of combining the waste oil pipe with the pipe tying machine body 1.

[0054] As a preferred embodiment of the present invention, the straightening and feeding assembly further includes a top plate 21, which is installed above the straightening channel 2. The width of the top plate 21 is the same as the minimum width of the straightening channel 2. The top plate 21 is tilted, and the end of the top plate 21 close to the feeding push rod 12 is higher than the end of the top plate 21 close to the pipe binding machine body 1.

[0055] The setting of the top plate 21 cooperates with the straightening channel 2 and the loading platform 11 to limit the height of the waste oil pipe so that the waste oil pipe is restricted on all sides during its movement, thereby enhancing the straightening effect of the waste oil pipe and achieving a high degree of straightening of the waste oil pipe.

[0056] As a preferred embodiment of the present invention, the convenient adjustment assembly includes two guide plates 22, the two guide plates 22 form a Y-shaped structure, and the gap between the two guide plates 22 forms a straightening channel 2;

[0057] An adjustment frame 23 is fixedly mounted on the loading platform 11 . A plurality of sliding grooves 24 are formed on the adjustment frame 23 . The guide plate 22 extends into the sliding grooves 24 . The guide plate 22 is slidably connected to the adjustment frame 23 .

[0058] An adjusting screw 25 is rotatably mounted in the sliding groove 24 and is screw-driven with the guide plate 22;

[0059] Since the diameters of waste oil pipes to be processed are diverse in actual application, in order to enhance the straightening effect of the straightening channel 2 on the waste oil pipe, the width of the straightening channel 2 is adjusted by a convenient adjustment component. Specifically, before straightening the oil pipe, the staff rotates the adjusting screw 25, causing the adjusting screw 25 to rotate in the sliding groove 24. Since the guide plate 22 extends into the sliding groove 24 and is spirally transmitted with the adjusting screw 25, the rotation of the adjusting screw 25 causes the guide plate 22 to slide. In this application, the adjusting screw 25 is provided with two sections of thread, and the two sections are connected to each other. The end threads are in opposite directions, and the two guide plates 22 are respectively spirally driven with the two ends of the adjusting screw 25. Therefore, when the adjusting screw 25 rotates, the two guide plates 22 approach or move away from each other, thereby realizing the adjustment of the width of the straightening channel 2, and the center of the adjusted straightening channel 2 is always consistent with the center of the pipe tying machine. It should be noted that in the preparation process before hot rolling of the oil pipe, in addition to adjusting the straightening channel 2, it is also necessary to adjust and replace the matching elastic core rod 13 and top plate 21 according to the diameter of the waste oil pipe, so that the hot rolling device matches the waste oil pipe to be operated.

[0060] As a preferred embodiment of the present invention, the convenient adjustment assembly further includes a lifting screw 26, the lifting screw 26 is rotatably mounted on the top plate 21, the lifting screw 26 extends to the adjustment frame 23, and the lifting screw 26 is threadedly connected to the adjustment frame 23;

[0061] The provision of the lifting screw 26 enables the top plate 21 to be lifted and lowered above the straightening channel 2, thereby adjusting the gap between the top plate 21 and the loading platform 11, and further adjusting the straightening effect on the waste oil pipe.

[0062] As a preferred embodiment of the present invention, rollers 27 evenly distributed are rotatably mounted on the top plate 21 and the guide plate 22, and the top plate 21 and the guide plate 22 are in rolling contact with the oil pipe through the rollers 27;

[0063] By installing rollers 27 on the top plate 21 and the guide plate 22, the top plate 21 and the guide plate 22 are in contact with the oil pipe through the rollers 27. The rolling of the rollers 27 effectively reduces the friction between the oil pipe and the top plate 21 and the guide plate 22, thereby preventing the oil pipe and the top plate 21 from being excessively worn.

[0064] As a preferred embodiment of the present invention, the convenient adjustment assembly further includes a mounting bracket 3, the mounting bracket 3 is fixedly mounted on the loading platform 11, and a symmetrically designed offset slot 31 is provided on the mounting bracket 3;

[0065] Support spring 32: A symmetrically designed support spring 32 is fixedly installed in the offset groove 31. The upper and lower ends of the induction heating coil 5 extend into the offset groove 31 and are fixedly connected to the support spring 32;

[0066] When transporting the waste oil pipe, in order to enhance the convenience of combining the waste oil pipe with the induction heating coil 5, a mounting frame 3 and an offset groove 31 are provided. In the initial state, under the action of the support spring 32, the induction heating coil 5 is in the middle of the mounting frame 3, and its center point is on the same horizontal straight line as the center of the pipe tying machine body 1. When the end of the waste oil pipe is inserted into the induction heating coil 5, as the waste oil pipe moves, since the waste oil pipe moves linearly, when the waste oil pipe is bent or deformed, the waste oil pipe pushes the induction heating coil 5, causing the induction heating coil 5 to squeeze the support spring 32 and then slide in the offset groove 31. During the transportation of the oil pipe, the induction heating coil 5 can always maintain connection with the oil pipe by offset sliding, thereby facilitating induction heating of the oil pipe.

[0067] As a preferred embodiment of the present invention, the mounting bracket 3 is located on the side of the adjusting bracket 23 away from the pipe tying machine body 1;

[0068] By installing the mounting bracket 3 on the side of the adjusting bracket 23 away from the pipe tying machine body 1, the waste oil pipe first enters the induction heating coil 5 when it moves, and the waste oil pipe is induction heated. After the temperature of the waste oil pipe reaches the metal phase transition temperature, limited straightening is performed, thereby reducing the difficulty of straightening the waste oil pipe.

[0069] As a preferred embodiment of the present invention, the induction heating coil 5 is fixedly installed with evenly distributed telescopic rods 4, and the telescopic rods 4 are rotatably connected to rollers 41. The telescopic rods 4 and the rollers 41 are made of high-temperature resistant insulating materials;

[0070] By installing the telescopic rod 4 and the roller 41 rotatably connected to the end of the telescopic rod 4, after the waste oil pipe is inserted into the induction heating coil 5, the roller 41 and the telescopic rod 4 are used to achieve elastic contact with the induction heating coil 5. Then, in conjunction with the offset groove 31 and the support spring 32, the induction heating coil 5 is always coaxial with the oil pipe, thereby enhancing the heating uniformity of the oil pipe.

[0071] As a preferred embodiment of the present invention, the telescopic rod 4 and the roller 41 are both made of high heat-resistance material, and the telescopic rod 4 is a pneumatic telescopic rod 4;

[0072] A pneumatic telescopic rod 4 is used. When the telescopic rod 4 is compressed, the air inside the telescopic rod 4 is compressed and deformed, thereby achieving the extension and retraction of the telescopic rod 4. At the same time, the telescopic rod 4 and the roller 41 are made of high-temperature resistant, insulating and highly heat-resistant materials. On the one hand, during induction heating, the telescopic rod 4 and the roller 41 are not affected by the induced electric field. On the other hand, when the oil pipe temperature rises, the efficiency of heat conduction to the telescopic rod 4 and the roller 41 can be reduced, thereby reducing the degree of change in the air temperature inside the telescopic rod 4.

[0073] A method for using a waste oil pipe hot rolling device, the method comprising the following steps:

[0074] S1: The waste oil pipes that are damaged, bent, or deformed to the degree that meets the recycling standards are cleaned and transported to the loading platform 11. The loading push rod 12 is started, and its output end is inserted into the inner cavity of the waste oil pipe, and the waste oil pipe is pushed toward the pipe-binding machine;

[0075] S2: The waste oil pipe extends into the interior of the induction heating coil 5 and elastically contacts the induction heating coil 5 through structures such as the roller 41. Under the action of induction heating, the temperature of the waste oil pipe rises to the metal phase transition temperature;

[0076] S3: As the waste oil pipe gradually enters the straightening channel 2 and is restricted by the guide plate 22 and the top plate 21, the waste oil pipe undergoes plastic deformation, thereby achieving preliminary straightening of the waste oil pipe;

[0077] S4: The waste oil pipe then enters the pipe-tying machine body 1. Under the squeezing action of the rollers, the oil pipe is plastically deformed again, and the hot rolling operation of the waste oil pipe is finally completed.

[0078] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste oil pipe hot rolling device, comprising a pipe-binding machine body (1) and an induction heating coil (5), wherein the induction heating coil (5) is installed on one side of the pipe-binding machine body (1), and the induction heating coil (5) is used to induction heat the oil pipe; Its characteristics are: It also includes a straightening and feeding assembly, which is installed on the pipe tying machine body (1) and is used to heat the oil pipe during the feeding process; The straightening and feeding assembly comprises a feeding platform (11), the feeding platform (11) is installed on the pipe tying machine body (1), and the feeding platform (11) corresponds to the input port of the pipe tying machine body (1); A feeding push rod (12), the feeding push rod (12) is fixedly mounted on the feeding platform (11), and the feeding push rod (12) is used to push the oil pipe to move toward the input port of the pipe binding machine; An elastic core rod (13), the elastic core rod (13) is fixedly mounted on the end of the feeding push rod (12), and the diameter of the elastic core rod (13) is smaller than the diameter of the waste oil pipe; A straightening channel (2), the straightening channel (2) is provided on the feeding platform (11), the straightening channel (2) is used to straighten the oil pipe, and the width of the straightening channel (2) at one end close to the feeding push rod (12) is greater than the width of the straightening channel (2) at one end close to the pipe tying machine body (1); A convenient adjustment component is provided, wherein the convenient adjustment component is used to adjust the position of the induction heating coil (5) and the diameter of the straightening channel (2).

2. The waste oil pipe hot rolling device according to claim 1, characterized in that: The straightening and feeding assembly further comprises a top plate (21), which is installed above the straightening channel (2). The width of the top plate (21) is the same as the minimum width of the straightening channel (2). The top plate (21) is tilted, and the end of the top plate (21) close to the feeding push rod (12) is higher than the end of the top plate (21) close to the pipe tying machine body (1).

3. The waste oil pipe hot rolling device according to claim 2, characterized in that: The convenient adjustment component comprises two guide plates (22), the two guide plates (22) forming a Y-shaped structure, and the gap between the two guide plates (22) forming a straightening channel (2); An adjusting frame (23), wherein the adjusting frame (23) is fixedly mounted on the loading platform (11), a plurality of sliding grooves (24) are provided on the adjusting frame (23), the guide plate (22) extends into the sliding grooves (24), and the guide plate (22) is slidably connected to the adjusting frame (23); An adjusting screw (25) is rotatably mounted in the sliding groove (24), and the adjusting screw (25) and the guide plate (22) are screw-driven.

4. The waste oil pipe hot rolling device according to claim 3, characterized in that: The convenient adjustment component further comprises a lifting screw (26), the lifting screw (26) is rotatably mounted on the top plate (21), the lifting screw (26) extends to the adjustment frame (23), and the lifting screw (26) is threadedly connected to the adjustment frame (23).

5. The waste oil pipe hot rolling device according to claim 4, characterized in that: The top plate (21) and the guide plate (22) are both rotatably mounted with rollers (27) distributed evenly, and the top plate (21) and the guide plate (22) are in rolling contact with the oil pipe via the rollers (27).

6. The waste oil pipe hot rolling device according to claim 1 or 5, characterized in that: The convenient adjustment component further comprises a mounting frame (3), wherein the mounting frame (3) is fixedly mounted on the loading platform (11), and a symmetrically designed offset slot (31) is provided on the mounting frame (3); A support spring (32) is fixedly installed in the offset groove (31) with a symmetrically designed support spring (32). The upper and lower ends of the induction heating coil (5) extend into the offset groove (31) and are fixedly connected to the support spring (32).

7. The waste oil pipe hot rolling device according to claim 6, characterized in that: The mounting frame (3) is located on a side of the adjustment frame (23) away from the pipe tying machine body (1).

8. The waste oil pipe hot rolling device according to claim 6, characterized in that: Uniformly distributed telescopic rods (4) are fixedly installed inside the induction heating coil (5), and rollers (41) are rotatably connected to the telescopic rods (4). Both the telescopic rods (4) and the rollers (41) are made of high-temperature resistant insulating materials.

9. The waste oil pipe hot rolling device according to claim 8, characterized in that: The telescopic rod (4) and the roller (41) are both made of high heat-resistance material, and the telescopic rod (4) is a pneumatic telescopic rod (4).

10. A method for using a waste oil pipe hot rolling device, characterized in that: The method is applicable to the waste oil pipe hot rolling device described in claim 9, and comprises the following steps: S1: The waste oil pipes that are damaged, bent, or deformed to the extent that they meet the recycling standards are cleaned and transported to the loading platform (11). The loading push rod (12) is started, and its output end is inserted into the inner cavity of the waste oil pipe, and the waste oil pipe is pushed toward the pipe-tying machine; S2: The waste oil pipe extends into the interior of the induction heating coil (5) and is in elastic contact with the induction heating coil (5) through structures such as a roller (41). Under the action of induction heating, the temperature of the waste oil pipe rises to the metal phase transition temperature; S3: As the waste oil pipe gradually enters the straightening channel (2), it is restricted by the guide plate (22) and the top plate (21), causing the waste oil pipe to undergo plastic deformation, thereby achieving preliminary straightening of the waste oil pipe; S4: The waste oil pipe then enters the pipe-tying machine body (1), and under the extrusion of the rollers, the oil pipe undergoes plastic deformation again, and finally the hot rolling operation of the waste oil pipe is completed.

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