A rotating peeling device for PE pipes

Abstract

The utility model discloses a kind of rotary peeling devices of PE pipe, including mounting seat, adjusting arm, cleaning assembly and locking assembly, cleaning assembly is set at the bottom of adjusting arm one end, locking assembly is set at the lower side of mounting seat, adjusting groove is equipped on the mounting seat, adjusting arm is slidably arranged in adjusting groove, the cleaning assembly includes power supply mounting box and motor mounting box, the utility model can utilize locking assembly to lock the entire rotary peeling device with PE pipe end before PE pipe hot melt welding, then start motor to make polishing wheel high-speed rotation, simultaneously push adjusting arm rotation, so that the polishing wheel of high-speed rotation is gradually moved to the end of PE pipe while circling the outer wall of PE pipe, to carry out the removal of oxidation layer to the entire circumferential surface within a certain distance of PE pipe end, so that PE carries out subsequent hot melt welding, solve the problem that welding surface cannot be fully fused due to oxidation layer, leading to the welding joint strength of PE pipe is low, prone to leakage.

Description

Technical Field

[0001] This utility model relates to a rotating scraping device for PE pipes. Background Technology

[0002] PE pipes are plastic pipes made of polyethylene material through extrusion molding. They have smooth inner walls, a low Manning coefficient, and low energy consumption when transporting fluids. They also possess excellent flexibility, impact resistance, and corrosion resistance. PE pipes are often joined using hot-melt welding, a method that involves heating the ends of the PE pipes with a heating tool, melting them, rapidly bonding them together, and then cooling and solidifying them under pressure to form a strong, sealed, and integrated permanent connection. However, during storage and transportation, the surface of existing PE pipes reacts with oxygen in the air, forming a thin oxide layer. The melting point of this oxide layer is much higher than that of the PE material itself. During hot-melt welding, this oxide layer can prevent the weld surfaces from fully fusion, resulting in low weld joint strength and a tendency to leak. Therefore, it is necessary to develop a rotary scraping device to remove the oxide layer from the surface of PE pipes to solve these problems. Utility Model Content

[0003] The purpose of this invention is to provide a rotary scraping device for PE pipes to solve the problems mentioned in the background art.

[0004] To solve the above problems, the present invention adopts the following technical solution: A rotary scraping device for PE pipes includes a mounting base, an adjusting arm, a cleaning component, and a locking component. The cleaning component is located at the bottom of one end of the adjusting arm, and the locking component is located on the lower side of the mounting base. The mounting base has an adjusting groove, and the adjusting arm is slidably disposed within the adjusting groove. The cleaning component includes a power supply mounting box and a motor mounting box. The power supply mounting box is located at the bottom of one end of the adjusting arm, and the motor mounting box is located at the bottom of the power supply mounting box. The power supply mounting box and the motor mounting box are in communication. The power supply mounting box contains a power source, and the motor mounting box contains a motor. The motor's output shaft is equipped with a grinding wheel. The power supply mounting box includes an L-shaped side plate, a top plate, and a bottom plate. There are two L-shaped side plates, which form a rectangular frame structure. The top plate is located on top of the two L-shaped side plates, and the bottom plate is fixed to the bottom of the two L-shaped side plates. A triangular plate is provided at the corner of the rectangular frame structure formed by the two L-shaped side plates. The top plate is connected to the triangular plate by bolts. The motor mounting box includes a cylindrical outer shell and a bottom plate. The cylindrical outer shell is fixed to the bottom of the bottom plate, and the bottom plate is fixed to the bottom of the cylindrical outer shell.

[0005] Preferably, the power supply is connected to the top plate by bolts, and the motor is connected to the bottom plate by bolts.

[0006] Preferably, the adjusting arm is provided with a strip groove, the mounting base is provided with a fastening threaded hole, and a fastening bolt is provided on one side of the mounting base. The fastening bolt passes through the strip groove and connects to the fastening threaded hole.

[0007] Preferably, the locking assembly includes a mounting cylinder, a bottom sealing ring, and a sliding seat. The mounting cylinder is disposed on the lower side of the mounting seat, the bottom sealing ring is disposed on the bottom of the sliding seat, and the sliding seat is slidably disposed on the inner side of the mounting cylinder. The side wall of the bottom sealing ring is provided with four side grooves in a cross shape. One end of each side groove is provided with a connecting groove. One side of each side groove is provided with a telescopic frame assembly. The top of the mounting cylinder is provided with a through hole, and a threaded cylinder is disposed in the through hole. One end of the threaded cylinder is provided with an end head, which is rotatably connected to the sliding seat. One side of the through hole on the mounting cylinder is provided with a pin hole, and a pin is disposed in the pin hole. The inner side of the threaded cylinder is provided with a threaded rod, and the top end of the threaded rod is connected to the mounting seat.

[0008] Preferably, the top of the threaded cylinder is provided with a control seat, the control seat is provided with a stepped through hole, the top of the threaded cylinder is inserted into the stepped through hole on the control seat, the threaded cylinder and the control seat are connected by bolts, the threaded rod passes through the stepped through hole on the control seat, and a second pin hole is provided on one side of the stepped through hole on the control seat, and a second pin is provided in the second pin hole.

[0009] Preferably, the side wall of the sliding seat has four protrusions in a cross shape, and each of the four protrusions has a connecting groove.

[0010] Preferably, the telescopic frame assembly includes a first support plate, a second support plate, and a support plate. The first support plate and the second support plate are arranged crosswise and hinged at their middle parts. The support plate is disposed on one side of the first support plate and the second support plate and has a sliding groove. One end of the first support plate is hinged to the support plate, and the other end of the first support plate is hinged to the side wall of the first connecting groove. One end of the second support plate is movably connected to the sliding groove, and the other end of the second support plate is hinged to the side wall of the second connecting groove.

[0011] Preferably, the support plate has two serrated protrusions on one side.

[0012] Preferably, the sliding seat has a through hole corresponding to the end, the end passes through the through hole on the sliding seat, and one end of the end has an annular groove with a rubber ring inside the annular groove.

[0013] Preferably, a raised ring is provided on one side of the bottom sealing ring, the raised ring extends into the inner side of the mounting cylinder, and the bottom sealing ring is connected to the bottom end of the mounting cylinder by bolts.

[0014] The beneficial effects of this utility model are as follows: Before the hot-melt welding of PE pipe, the entire rotating scraping device can be locked to the end of the PE pipe using a locking assembly. Then, the motor is started to make the grinding wheel rotate at high speed, while pushing the adjusting arm to rotate. This allows the high-speed rotating grinding wheel to move gradually towards the end of the PE pipe while circling the outer wall of the PE pipe, thereby removing the oxide layer from the entire circumferential surface within a certain distance of the end of the PE pipe. This facilitates the subsequent hot-melt welding of the PE pipe and solves the problem that the oxide layer prevents the welding surface from fully fusing, resulting in low weld joint strength and easy leakage of the PE pipe. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below, but this is not a limitation on the protection scope of this utility model.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model Figure 1 A schematic diagram of the structure of the clearing component; Figure 3 This utility model Figure 2 Exploded view of the power supply mounting box; Figure 4 This utility model Figure 2 Exploded view of the motor mounting box; Figure 5 This utility model Figure 1 Schematic diagram of the middle mounting base; Figure 6 This utility model Figure 1 A schematic diagram of the structure of the locking component; Figure 7 This utility model Figure 6 Schematic diagram of the structure of the middle mounting cylinder; Figure 8 This utility model Figure 6 Schematic diagram of the middle sealing bottom ring; Figure 9 This utility model Figure 6 Schematic diagram of the middle sliding seat; Figure 10 This utility model Figure 6 Schematic diagram of the structure of the telescopic frame assembly; Figure 11 This utility model Figure 6 Schematic diagram of the structure of the threaded cylinder; Figure 12 This utility model Figure 6 Schematic diagram of the threaded rod; Figure 13 This utility model Figure 6 Schematic diagram of the central control unit; Figure 14 This utility model Figure 6 Schematic diagram of the structure of the central pin column; Figure 15 This utility model Figure 6 Installation diagram of the central pin column 1.

[0017] In the diagram: 11. Mounting base; 12. Adjusting arm; 13. Cleaning assembly; 14. Locking assembly; 15. Slotted groove; 16. Fastening bolt; 17. Power supply mounting box; 18. Motor mounting box; 19. Power supply; 20. Motor; 21. Grinding wheel; 22. L-shaped side plate; 23. Top plate; 24. Base plate one; 25. Triangular plate; 26. Cylindrical outer shell; 27. Base plate two; 28. Adjusting groove; 29. ​​Fastening threaded hole; 30. 31. Mounting cylinder; 32. Bottom sealing ring; 33. Sliding seat; 34. Telescopic frame assembly; 35. Threaded cylinder; 36. Threaded rod; 37. Control seat; 38. Pin 1; 39. Pin 2; 40. Side groove; 41. Connecting groove 1; 42. Pin hole 1; 43. Protruding ring; 44. Protrusion; 45. Connecting groove 2; 46. Support plate 1; 47. Support plate; 48. Slide groove; 49. End; 50. Pin hole 2. Detailed Implementation

[0018] See Figures 1 to 15The rotating scraping device for PE pipe shown includes a mounting base 11, an adjusting arm 12, a cleaning component 13, and a locking component 14. The cleaning component 13 is located at the bottom of one end of the adjusting arm 12, and the locking component 14 is located on the lower side of the mounting base 11. The mounting base 11 has an adjusting groove 28, and the adjusting arm 12 is slidably disposed in the adjusting groove 28. The cleaning component 13 includes a power supply mounting box 17 and a motor mounting box 18. The power supply mounting box 17 is located at the bottom of one end of the adjusting arm 12, and the motor mounting box 18 is located at the bottom of the power supply mounting box 17. The power supply mounting box 17 and the motor mounting box 18 are connected. The power supply mounting box 17 contains a power supply 19, and the motor mounting box 18 contains a motor 20. The output shaft of the motor 20 is provided with a grinding wheel 21. The power supply mounting box 17 includes an L-shaped side plate 22, a top plate 23, and a bottom plate. 1. The L-shaped side plates 22 are two in number, forming a rectangular frame structure. The joint of the two L-shaped side plates 22 is fixed by welding. The top plate 23 is set on the top of the two L-shaped side plates 22. The edge of the bottom plate 24 is welded to the bottom edge of the two L-shaped side plates 22, so that the bottom plate 24 is fixed to the bottom of the two L-shaped side plates 22. Triangular plates 25 are welded to the corners of the rectangular frame structure formed by the two L-shaped side plates 22. The top plate 23 is connected to the triangular plates 25 by bolts. The top plate 23 is detachably installed on the top of the two L-shaped side plates 22 by bolts and triangular plates 25. The motor mounting box 18 includes a cylindrical outer shell 26 and a bottom plate 27. The cylindrical outer shell 26 is fixed to the bottom of the bottom plate 24 by welding, and the bottom plate 27 is fixed to the bottom of the cylindrical outer shell 26 by welding.

[0019] Furthermore, the power supply 19 is connected to the top plate 23 by bolts. The fastening threaded hole 29 and the corresponding threaded hole on the top plate 23 are provided. Installing the bolts allows the power supply 19 to be stably installed inside the power supply mounting box 17. The motor 20 is connected to the bottom plate 27 by bolts. The bottom plate 27 and the motor 20 are provided with corresponding threaded holes. Installing the bolts allows the motor 20 to be stably installed inside the motor mounting box 18. The power supply 19 consists of a battery box with a toggle switch and a matching battery. Both the battery box and the battery can be directly purchased. The power supply 19 is wired to the motor 20, thus providing power to the motor 20. The top plate 23 has a rectangular hole corresponding to the toggle switch on the power supply 19. When the power supply 19 is installed inside the power supply mounting box 17, the toggle switch passes through the rectangular hole on the top plate 23, allowing operation of the toggle switch from outside the power supply mounting box 17 to control the start and stop of the motor 20.

[0020] Furthermore, the adjusting arm 12 is provided with a strip groove 15, the mounting base 11 is provided with a fastening threaded hole 29, and a fastening bolt 16 is provided on one side of the mounting base 11. The fastening bolt 16 passes through the strip groove 15 and connects to the fastening threaded hole 29. When the fastening bolt 16 is tightened, the adjusting arm 12 is clamped between the end of the fastening bolt 16 and the inner wall of the adjusting groove 28, so that the relative position of the adjusting arm 12 and the mounting base 11 is fixed. When the fastening bolt 16 is loosened, the adjusting arm 12 can be slid horizontally, thereby adjusting the distance between the cleaning component 13 and the mounting base 11 according to the diameter of the PE pipe to be processed, so that the edge of the grinding wheel 21 abuts against the surface of the PE pipe to be processed.

[0021] Furthermore, the locking assembly 14 includes a mounting cylinder 30, a bottom sealing ring 31, and a sliding seat 32. The mounting cylinder 30 is disposed on the lower side of the mounting seat 11, the bottom sealing ring 31 is disposed on the bottom of the sliding seat 32, and the sliding seat 32 is slidably disposed on the inner side of the mounting cylinder 30. The bottom sealing ring 31 has four side grooves 39 arranged in a cross shape on its side wall. Each side groove 39 has a connecting groove 40 at one end, and a telescopic frame assembly 33 is provided on one side of each side groove 39. The top of the mounting cylinder 30 has a through hole, and a threaded cylinder 34 is disposed in the through hole. One end is provided with an end head 49, which is rotatably connected to the sliding seat 32. A pin hole 41 is provided on one side of the through hole on the mounting cylinder 30, and a pin 37 is provided in the pin hole 41. A threaded rod 35 is provided on the inner side of the threaded cylinder 34. The top end of the threaded rod 35 is connected to the mounting seat 11. The mounting seat 11 is provided with an insertion hole corresponding to the threaded rod 35. The top end of the threaded rod 35 is inserted into the insertion hole on the mounting seat 11. The top end of the threaded rod 35 and the side wall of the insertion hole on the mounting seat 11 are provided with corresponding threaded holes. By installing bolts, the mounting seat 11 and the threaded rod 35 can be fixed.

[0022] Furthermore, the top of the threaded cylinder 34 is provided with a control seat 36, and the control seat 36 is provided with a stepped through hole. The inner diameter of the lower part of the stepped through hole corresponds to the outer diameter of the threaded cylinder 34, and the inner diameter of the upper part of the stepped through hole corresponds to the outer diameter of the threaded rod 35. The top end of the threaded cylinder 34 is inserted into the stepped through hole on the control seat 36. The threaded cylinder 34 and the control seat 36 are connected by bolts. The end of the threaded cylinder 34 and the lower side wall of the stepped through hole on the control seat 36 are provided with corresponding threaded holes. By installing bolts, the control seat 36 and the threaded cylinder 34 can be fixed. The threaded rod 35 passes through the stepped through hole on the control seat 36. A second pin hole 50 is provided on one side of the stepped through hole on the control seat 36, and a second pin 38 is provided in the second pin hole 50.

[0023] Furthermore, the sliding seat 32 has four protrusions 43 arranged in a cross shape on its side wall, and each of the four protrusions 43 has a connecting groove 44. The sliding seat 32 and the four protrusions 43 are an integral structure. The sliding seat 32 is slidably disposed inside the mounting cylinder 30, and the protrusions 43 are slidably disposed in the side groove 39.

[0024] Furthermore, the telescopic frame assembly 33 includes a first support plate 45, a second support plate 46, and a support plate 47. The first support plate 45 and the second support plate 46 are arranged crosswise and hinged at their middle portions. The support plate 47 is disposed on one side of the first support plate 45 and the second support plate 46, and has a sliding groove 48. One end of the first support plate 45 is hinged to the support plate 47, and the other end of the first support plate 45 is hinged to the side wall of the connecting groove 40. One end of the second bracket plate 46 is movably connected to the slide groove 48 via a hinged bolt, which can slide along the slide groove 48. The other end of the second bracket plate 46 is hinged to the side wall of the second connecting groove 44. When the mounting cylinder 30 and the sliding seat 32 move relative to each other, the first bracket plate 45 and the second bracket plate 46 rotate around the hinge point, and the support plate 47 moves with the position change of the ends of the first bracket plate 45 and the second bracket plate 46, thereby adjusting the distance between the support plate 47 and the axis of the mounting cylinder 30.

[0025] Furthermore, the support plate 47 has two serrated protrusions on one side. When the locking component 14 is inserted into the PE pipe and the telescopic frame component 33 unfolds to support the inner wall of the PE pipe, the support plate 47 presses tightly against the inner wall of the PE pipe. The serrated protrusions on the support plate 47 increase the friction between the support plate 47 and the inner wall of the PE pipe, thereby enhancing the stability of the locking component 14 installed inside the PE pipe and preventing the locking component 14 from slipping and falling off.

[0026] Furthermore, the sliding seat 32 is provided with a through hole corresponding to the end 49, and the end 49 passes through the through hole on the sliding seat 32. One end of the end 49 is provided with an annular groove, and a rubber ring is provided in the annular groove. The rubber ring on the end 49 limits the sliding seat 32, so that the end 49 and the sliding seat 32 are stably rotatably connected. When the threaded cylinder 34 rotates, the protrusion 43 on the sliding seat 32 is stuck by the side groove 39 on the mounting cylinder 30, so that the sliding seat 32 will not rotate. When the threaded cylinder 34 moves up and down in a straight line, the sliding seat 32 slides inside the mounting cylinder 30 accordingly.

[0027] Furthermore, a raised ring 42 is provided on one side of the bottom sealing ring 31. The raised ring 42 extends into the inner side of the mounting cylinder 30. The bottom sealing ring 31 is connected to the bottom end of the mounting cylinder 30 by bolts. The bottom sealing ring 31 seals the bottom end of the mounting cylinder 30 to prevent the sliding seat 32 from coming out of the inner side of the mounting cylinder 30.

[0028] The pin 37 of this invention has a groove on its side wall. One side wall of the groove is arc-shaped, and the arc-shaped side wall of the groove has threads corresponding to the threads on the surface of the threaded cylinder 34. A spring is provided between one end of the pin 37 and the inner wall of the pin hole 41, and the other end of the pin 37 extends out of the pin hole 41. The threaded cylinder 34 passes between the inner wall of the through hole on the mounting cylinder 30 and the inner wall of the groove on the pin 37. Under the action of the spring, the arc-shaped side wall of the groove on the pin 37 tightly abuts against the surface of the threaded cylinder 34, and the threads on the arc-shaped side wall... The threaded engagement with the threaded cylinder 34 allows the pin 37 to be threadedly connected to the threaded cylinder 34. At this time, by holding the mounting cylinder 30 and rotating the threaded cylinder 34, the threaded cylinder 34 can move relative to the mounting cylinder 30, thereby controlling the sliding seat 32 to slide inside the mounting cylinder 30. Pressing the pin 37 causes the pin 37 to move inside the pin hole 41, which separates the arc-shaped sidewall of the groove of the pin 37 from the surface of the threaded cylinder 34, and the threaded connection between the pin 37 and the threaded cylinder 34 is released. At this time, the operator can slide the mounting cylinder 30 along the threaded cylinder 34.

[0029] Pin 2 38 has the same structure as pin 1 37. The installation method of pin 2 38 in pin hole 2 50 is the same as the installation method of pin 1 37 in pin hole 1 41, so that pin 2 38 is threadedly connected to threaded rod 35 under normal conditions. Pressing pin 2 38 will release the threaded connection between pin 2 38 and threaded rod 35.

[0030] The working principle of this utility model is as follows: Before the PE pipe is hot-melted and welded, the telescopic frame assembly 33 is in a retracted state, and the support plate 47 is positioned close to the mounting cylinder 30. First, the locking assembly 14 is inserted into the PE pipe until all four telescopic frame assemblies 33 are inserted into the PE pipe. At this time, the threaded cylinder 34 is held still, and the pin 1 37 is pressed to release the threaded connection between the pin 1 37 and the threaded cylinder 34. Then, the mounting cylinder 30 is pushed to move away from the threaded rod 35. The connecting groove 1 40 on the mounting cylinder 30 moves accordingly, and the bracket plate 1 45, which is hinged to the inner wall of the connecting groove 1 40, is pushed. The bracket plate 2 46 and the support plate 47 move accordingly, causing the support plate 47 to move away from the axis of the mounting cylinder 30, that is, the telescopic frame assembly 33 is unfolded. When the support plate 47 supports the inner wall of the PE pipe, release the first pin 37, and the first pin 37 and the threaded cylinder 34 will be reconnected. At the same time, press the second pin 38 to release the threaded connection between the second pin 38 and the threaded rod 35. Then, hold the installation cylinder 30 and rotate the control seat 36 to make the threaded cylinder 34 rotate accordingly, so that the threaded cylinder 34 moves away from the bottom sealing ring 31, thereby moving the sliding seat 32 accordingly. The hinge point between the second bracket plate 46 and the sliding seat 32 and the hinge point between the first bracket plate 45 and the connecting groove 40 are close, so that the support plate 47 is subjected to the thrust applied by the first bracket plate 45 and the second bracket plate 46, so that the support plate 47 is tightly pressed against the inner wall of the PE pipe. The locking assembly 14 can be stably locked inside the PE pipe by using the three telescopic bracket assemblies 33.

[0031] At this point, the cleaning component 13 is positioned on one side of the PE pipe. Loosen the fastening bolt 16 to release the lock between the mounting base 11 and the adjusting arm 12. Slide the adjusting arm 12 to move the cleaning component 13 closer to the PE pipe until the grinding wheel 21 abuts against the outer wall of the PE pipe. The grinding wheel 21 is a certain distance from the end of the PE pipe; this distance corresponds to the part of the PE pipe where the oxide layer needs to be removed. Tighten the fastening bolt 16 to lock the adjusting arm 12 and the mounting base 11, ensuring that the distance between the grinding wheel 21 and the axis of the PE pipe remains constant. Then, operate the toggle switch of the power supply 19 to energize the motor 20, causing the grinding wheel 21 to rotate. The rotating grinding wheel 21 can grind the surface of the PE pipe it contacts, thereby removing the oxide layer at the grinding point. Meanwhile, with pin 2 38 in the loosened state and pin 2 38 and threaded rod 35 in threaded connection, the operator pushes the adjusting arm 12 to rotate, thereby causing the cleaning component 13, mounting base 11 and threaded rod 35 to rotate. The rotation of the cleaning component 13 causes the grinding wheel 21 to move around the PE pipe, thereby removing the oxide layer from the entire circumference of the PE pipe surface. The rotation of the threaded rod 35 causes the threaded rod 35 to move away from the threaded cylinder 34, thereby causing the mounting base 11, adjusting arm 12 and cleaning component 13 to move together, so that the grinding wheel 21 moves gradually towards the end of the PE pipe while circling the outer wall of the PE pipe, thereby removing the oxide layer from the entire circumference within a certain distance of the end of the PE pipe, so that the PE can be subsequently hot-melted welded.

[0032] Finally, the operator holds the threaded cylinder 34 and presses down on the pin 37 to disengage the threaded connection between the pin 37 and the threaded cylinder 34. Then, the operator pulls the mounting cylinder 30 to move it closer to the control seat 36, causing the hinge points of the bracket plate 46 and the sliding seat 32 and the bracket plate 45 and the connecting groove 40 to move away from each other. The support plate 47 is pulled by the bracket plate 45 and the bracket plate 46, causing the support plate 47 to move closer to the mounting cylinder 30, thus separating the support plate 47, which was originally pressed tightly against the inner wall of the PE pipe, from the inner wall of the PE pipe. After that, the locking assembly 14 can be removed from the PE pipe.

[0033] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A rotary scraping device for PE pipes, characterized in that: The device includes a mounting base, an adjusting arm, a cleaning assembly, and a locking assembly. The cleaning assembly is located at the bottom of one end of the adjusting arm, and the locking assembly is located on the lower side of the mounting base. The mounting base has an adjusting groove, and the adjusting arm is slidably disposed within the adjusting groove. The cleaning assembly includes a power supply mounting box and a motor mounting box. The power supply mounting box is located at the bottom of one end of the adjusting arm, and the motor mounting box is located at the bottom of the power supply mounting box. The power supply mounting box and the motor mounting box are connected. The power supply mounting box contains a power source, and the motor mounting box contains a motor. The output shaft of the motor has a grinding wheel. The power supply mounting box includes two L-shaped side plates, a top plate, and a bottom plate. There are two L-shaped side plates, which form a rectangular frame structure. The top plate is located on top of the two L-shaped side plates, and the bottom plate is fixed to the bottom of the two L-shaped side plates. A triangular plate is provided at the corner of the rectangular frame structure formed by the two L-shaped side plates, and the top plate is connected to the triangular plate by bolts. The motor mounting box includes a cylindrical outer shell and a bottom plate. The cylindrical outer shell is fixed to the bottom of the bottom plate, and the bottom plate is fixed to the bottom of the cylindrical outer shell.

2. The rotary scraping device for PE pipes according to claim 1, characterized in that: The power supply is connected to the top plate by bolts, and the motor is connected to the bottom plate by bolts.

3. The rotary scraping device for PE pipes according to claim 1, characterized in that: The adjusting arm is provided with a strip groove, the mounting base is provided with a fastening threaded hole, and a fastening bolt is provided on one side of the mounting base. The fastening bolt passes through the strip groove and connects to the fastening threaded hole.

4. The rotary scraping device for PE pipes according to claim 1, characterized in that: The locking assembly includes a mounting cylinder, a bottom sealing ring, and a sliding seat. The mounting cylinder is located on the lower side of the mounting seat, the bottom sealing ring is located at the bottom of the sliding seat, and the sliding seat is slidably located inside the mounting cylinder. The bottom sealing ring has four side grooves arranged in a cross shape on its side wall. Each side groove has a connecting groove at one end and a telescopic frame assembly on one side of each side groove. The top of the mounting cylinder has a through hole, in which a threaded cylinder is installed. One end of the threaded cylinder has an end cap, which is rotatably connected to the sliding seat. One side of the through hole on the mounting cylinder has a pin hole, in which a pin is installed. The inner side of the threaded cylinder has a threaded rod, the top of which is connected to the mounting seat.

5. The rotary scraping device for PE pipe according to claim 4, characterized in that: The top of the threaded cylinder is provided with a control seat, and the control seat is provided with a stepped through hole. The top of the threaded cylinder is inserted into the stepped through hole on the control seat. The threaded cylinder and the control seat are connected by bolts. The threaded rod passes through the stepped through hole on the control seat. A pin hole is provided on one side of the stepped through hole on the control seat, and a pin is provided in the pin hole.

6. The rotary scraping device for PE pipe according to claim 4, characterized in that: The sliding seat has four protrusions in a cross shape on its side wall, and each of the four protrusions has a connecting groove.

7. The rotary scraping device for PE pipes according to claim 4, characterized in that: The telescopic frame assembly includes a first support plate, a second support plate, and a support plate. The first support plate and the second support plate are arranged crosswise and hinged at their middle parts. The support plate is located on one side of the first support plate and the second support plate and has a sliding groove. One end of the first support plate is hinged to the support plate, and the other end of the first support plate is hinged to the side wall of the first connecting groove. One end of the second support plate is movably connected to the sliding groove, and the other end of the second support plate is hinged to the side wall of the second connecting groove.

8. The rotary scraping device for PE pipe according to claim 7, characterized in that: The support plate has two serrated protrusions on one side.

9. A rotary scraping device for PE pipes according to claim 4, characterized in that: The sliding seat has a through hole corresponding to the end, and the end passes through the through hole on the sliding seat. One end of the end has an annular groove, and a rubber ring is provided in the annular groove.

10. A rotary scraping device for PE pipes according to claim 4, characterized in that: The bottom sealing ring has a raised ring on one side, which extends into the inside of the mounting cylinder. The bottom sealing ring is connected to the bottom end of the mounting cylinder by bolts.

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