Polishing equipment for PE (Poly Ethylene) pipe

Abstract

The utility model relates to PE pipe grinding equipment which comprises a rail and a travelling crane, the travelling crane moves in the length direction of the rail, grinding assemblies are oppositely arranged on the travelling crane and used for grinding the end of a PE pipe, a pipe blocking frame is arranged on the travelling crane, pipe blocking assemblies are oppositely arranged on the pipe blocking frame, and the pipe blocking assemblies are used for blocking the end of the PE pipe. One end of the pipe blocking assembly makes contact with the end of the PE pipe and is used for positioning the end of the PE pipe, a recycling mechanism is arranged on the traveling crane and is used for adsorbing chippings generated by polishing, and through cooperation of the track and the traveling crane, the equipment can flexibly adapt to the PE pipes of different lengths and specifications, and different production requirements are met. And the inclination angle of the grinding assembly is adjustable, so that the consistency and high quality of the grinding effect are ensured, and a solid guarantee is provided for subsequent welding and connection. And the end of the PE pipe is stably positioned through the pipe blocking assembly, shaking in the polishing process is prevented, and the polishing precision and safety are improved.

Description

Technical Field

[0001] The present application relates to the technical field of PE pipe processing, and in particular to a PE pipe grinding device. Background Art

[0002] In the rapidly developing pipe processing industry, PE (polyethylene) pipe has become the material of choice for fluid transmission systems due to its excellent corrosion and wear resistance, lightweight design, and easy installation. Whether in urban water supply and drainage systems, chemical processing, or agricultural irrigation, PE pipe plays an irreplaceable role.

[0003] However, a critical and often overlooked step in the production, processing, and installation of PE pipes is the polishing of their ends. The flatness and smoothness of the PE pipe ends directly impact the quality of subsequent welding and connection, and are crucial for ensuring the sealing, stability, and durability of the entire piping system. This requirement is particularly stringent when handling large PE pipes.

[0004] However, existing PE pipe end grinding equipment is particularly bulky and inflexible when handling large PE pipes, making it difficult to achieve efficient and accurate grinding within a limited space. This not only reduces production efficiency but also increases operational difficulty and costs.

[0005] Secondly, if the debris and dust generated during the grinding process are not effectively handled, they will seriously pollute the working environment and pose a threat to the health of operators. Existing equipment often has deficiencies in debris recovery and environmental protection, and cannot meet the high standards of cleanliness and environmental protection required by modern industrial production.

[0006] In view of the above problems, a PE pipe grinding device is now designed. Utility Model Content

[0007] The embodiment of the present application provides a PE pipe grinding device to solve the problem that the existing PE pipe end grinding processing equipment in the related art is particularly bulky and inflexible when dealing with large PE pipes, and it is difficult to achieve efficient and accurate grinding operations in a limited space.

[0008] In a first aspect, a PE pipe grinding device is provided, comprising:

[0009] Track and trolley, the trolley moves along the length of the track, a grinding assembly is relatively provided on the trolley, the grinding assembly is used to grind the end of the PE pipe, the trolley is provided with a pipe retaining rack, the pipe retaining assembly is relatively provided on the pipe retaining rack, one end of the pipe retaining assembly contacts the end of the PE pipe and is used to position the end of the PE pipe, and the trolley is provided with a recovery mechanism, the recovery mechanism is used to absorb debris generated by grinding;

[0010] The grinding assembly includes a mounting frame, a driving member and a grinder. The mounting frame is set on a crane, and the grinder is set on the mounting frame. The driving member is connected to one end of the mounting frame. The driving member is used to control the up and down movement of one end of the mounting frame to adjust the inclination angle of the grinder.

[0011] In some embodiments, the carriage includes a bottom plate, a rotating shaft is provided at the bottom of the bottom plate for relative rotation, and walking rollers are provided at both ends of the rotating shaft;

[0012] A fixing frame is provided on the bottom plate, a driving motor 1 is provided on the fixing frame, and an output shaft of the driving motor 1 is connected to one end of any rotating shaft.

[0013] In some embodiments, the mounting frame includes a bracket disposed on a vehicle, and a chassis is rotatably disposed on the bracket;

[0014] The driving member is a cylinder, which is hingedly arranged on the crane, and the cylinder piston rod is hingedly connected to one end of the bottom of the chassis.

[0015] In some embodiments, the number of the grinding assemblies is two, and the two grinding assemblies are arranged opposite to each other on the carriage;

[0016] The grinding machine comprises:

[0017] The second driving motor and the bearing seat are arranged on the traveling crane, rotating the roller arranged on the bearing seat, the wire roller is arranged at one end of the roller, and the output shaft of the second driving motor is connected to the other end of the roller.

[0018] In some embodiments, the grinding assembly, the pipe retaining rack, and the recovery mechanism are sequentially distributed along the length of the crane, and the pipe retaining rack is in an N-shape.

[0019] In some embodiments, the pipe retaining assembly includes a body embedded in a pipe retaining frame, a screw rod is rotatably arranged inside the body, a screw nut is threadedly connected to the outer side of the screw rod, a sliding rod is provided at one end of the screw nut, a wheel frame is provided at one end of the sliding rod, and a roller is rotatably arranged on the wheel frame.

[0020] In some embodiments, the recovery mechanism includes a fan installed on a traveling crane, the fan air inlet is provided with an air hood, the fan air outlet is provided with an upper section air tube, the upper section air tube is Y-shaped, and the other two ends of the upper section air tube are provided with recovery tubes, and the upper and lower ends of the recovery tube are respectively provided with a top ventilation bag and a waste bag.

[0021] The embodiment of the present application provides a PE pipe grinding device. Through the coordination of tracks and cranes, the device can flexibly adapt to PE pipes of different lengths and specifications to meet different production needs. The inclination angle of the grinding assembly is adjustable, ensuring the consistency and high quality of the grinding effect, providing a solid guarantee for subsequent welding and connection. The stable positioning of the PE pipe end by the pipe retaining assembly prevents shaking during the grinding process and improves the grinding accuracy and safety. In this way, the PE pipe end can be quickly and accurately ground, significantly improving production efficiency.

[0022] The recycling mechanism effectively collects the chips and dust generated by grinding, reducing environmental pollution and protecting the health of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 A schematic diagram of the structure provided in an embodiment of the present application;

[0025] Figure 2 A left side cross-sectional view provided for an embodiment of the present application;

[0026] Figure 3 A top cross-sectional view provided for an embodiment of the present application;

[0027] Figure 4 A schematic diagram of the pipe retaining rack structure provided in an embodiment of the present application;

[0028] Figure 5 A schematic diagram of the connection structure between the fan and the upper section of the wind tube provided in an embodiment of the present application;

[0029] Figure 6 A schematic diagram of the structure of the pipe retaining assembly provided in an embodiment of the present application.

[0030] In the figure: 1. Track; 2. Crane; 21. Bottom plate; 22. Rotating shaft; 23. Driving motor 1; 3. Grinding assembly; 31. Mounting frame; 311. Bracket; 312. Chassis; 32. Driving part; 33. Grinding machine; 4. Pipe retaining frame; 5. Pipe retaining assembly; 51. Machine body; 52. Screw; 53. Screw nut; 54. Sliding rod; 55. Wheel frame; 56. Roller; 6. Recovery mechanism; 61. Fan; 62. Air hood; 63. Upper air duct; 64. Recovery duct; 65. Top ventilation bag; 66. Waste bag. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0032] The embodiment of the present application provides a PE pipe grinding device, which can solve the problem that the existing PE pipe end grinding processing equipment in the related art is particularly bulky and inflexible when dealing with large PE pipes, and it is difficult to achieve efficient and accurate grinding operations in a limited space.

[0033] See also Figure 1-Figure 3 A PE pipe grinding device comprises: a track 1 and a crane 2, the crane 2 moves along the length of the track 1, a grinding assembly 3 is relatively arranged on the crane 2, the grinding assembly 3 is used to grind the end of the PE pipe, the crane 2 is provided with a pipe retaining rack 4, the pipe retaining rack 4 is relatively provided with a pipe retaining assembly 5, one end of the pipe retaining assembly 5 contacts the end of the PE pipe and is used to position the end of the PE pipe, the crane 2 is provided with a recovery mechanism 6, the recovery mechanism 6 is used to absorb debris generated by grinding;

[0034] The grinding assembly 3 includes a mounting frame 31, a driving member 32 and a grinder 33. The mounting frame 31 is set on the crane 2, and the grinder 33 is set on the mounting frame 31. The driving member 32 is connected to one end of the mounting frame 31. The driving member 32 is used to control the up and down movement of one end of the mounting frame 31 and adjust the inclination angle of the grinder 33.

[0035] The device is moved in the horizontal direction as a whole through the track 1 at the bottom thereof, so that the device can flexibly adapt to PE pipes of different lengths or be quickly switched between different workstations.

[0036] The trolley 2, the main moving component of the equipment, moves along the track 1 to the designated position, whereupon the grinding assembly 3, mounted on it, begins operation. The grinding assembly 3 consists of a mounting frame 31, a drive 32, and a grinder 33. The mounting frame 31 is securely fixed to the trolley 2, providing support for the grinder 33. The drive 32 controls the vertical movement of one end of the mounting frame 31, thereby enabling fine adjustment of the inclination angle of the grinder 33. This design enables the grinder 33 to automatically adjust to the optimal grinding angle based on the shape and grinding requirements of different PE pipe ends, ensuring consistent and high-quality grinding results.

[0037] During the grinding process, the pipe retaining assembly 5 on the pipe retaining frame 4 is in close contact with the end of the PE pipe, ensuring that the PE pipe remains stable during the grinding process and achieving a positioning effect.

[0038] At the same time, the recycling mechanism 6 continues to work, using its powerful adsorption force to promptly collect the debris and dust generated during the grinding process. This not only keeps the working environment clean, but also protects the health of the operators, meeting the high requirements of modern industrial production for environmental protection and health.

[0039] The coordination of track 1 and crane 2 enables the equipment to flexibly adapt to PE pipes of varying lengths and specifications, meeting diverse production requirements. The adjustable inclination angle of grinding assembly 3 ensures consistent and high-quality grinding, providing a solid foundation for subsequent welding and connection. The pipe retaining assembly 5 stably positions the PE pipe end, preventing movement during the grinding process and improving grinding accuracy and safety. This enables rapid and precise grinding of PE pipe ends, significantly improving production efficiency.

[0040] The recovery mechanism 6 effectively collects the debris and dust generated by grinding, reduces environmental pollution, and protects the health of operators.

[0041] Specifically, such as Figure 2 As shown, the traveling crane 2 in this embodiment includes a base plate 21, a rotating shaft 22 is provided at the bottom of the base plate 21 for relative rotation, and walking rollers are provided at both ends of the rotating shaft 22; a fixing frame is provided on the base plate 21, and a driving motor 23 is provided on the fixing frame, and the output shaft of the driving motor 23 is connected to one end of any rotating shaft 22.

[0042] The crane 2 is responsible for moving along the track 1 in the length direction so as to bring the grinding assembly 3 to the designated position of the PE pipe for grinding.

[0043] The base plate 21 serves as the foundational support structure for the trolley 2, bearing the entire weight of the trolley and all other components. The rotating shaft 22 is a key component connecting the base plate 21 to the running rollers. Running rollers are mounted on both ends of the rotating shaft 22. These rollers contact the track surface of the track 1, providing support and guidance for the trolley's movement. The fixed bracket is used to mount and secure the drive motor 23. The fixed bracket should be designed to ensure stability and ease of installation and maintenance.

[0044] When the driving motor 1 23 is started, it drives the rotating shaft 22 connected thereto to rotate, thereby driving the walking rollers to roll on the track 1, thereby realizing the overall movement of the vehicle.

[0045] Further, such as Figure 2As shown, in this embodiment, the mounting frame 31 includes a bracket 311 arranged on the crane 2, and a chassis 312 is rotatably arranged on the bracket 311. The driving member 32 is a cylinder, and the cylinder is hingedly arranged on the crane 2. The cylinder piston rod is hinged to one end of the bottom of the chassis 312.

[0046] The mounting frame 31 serves as a support and adjustment mechanism for the grinder 33 , and is mainly composed of a bracket 311 , a chassis 312 and a driving member 32 .

[0047] The bracket 311 provides support for the entire mounting frame 31. The design of the bracket 311 should take into account the requirements of load-bearing capacity, stability, and ease of installation and maintenance.

[0048] Chassis 312 is the platform for installing the grinder 33. By the rotation of chassis 312, the preliminary adjustment of the position of the grinder 33 can be achieved.

[0049] The pneumatic cylinder, the primary power source for adjusting the tilt angle of the grinder 33, is hingedly mounted on the crane 2. This articulated design allows the cylinder to swing freely within a certain range, thereby tilting the chassis 312, to which its piston rod is hinged. As the cylinder's piston rod extends or contracts, it interacts with the chassis 312 at the hinge point, causing the chassis 312 to tilt about its axis of rotation. Because the grinder 33 is mounted on the chassis 312, its tilt angle also changes accordingly.

[0050] It should be noted that, in this embodiment, the number of the grinding assemblies 3 is two, and the two grinding assemblies 3 are relatively arranged on the crane 2; the grinder 33 includes: a second drive motor and a bearing seat arranged on the crane 2, a roller arranged on the bearing seat for rotation, a wire roller arranged at one end of the roller, and the output shaft of the second drive motor is connected to the other end of the roller.

[0051] The two grinding assemblies 3 are arranged opposite each other on the crane 2, which means that both ends of the PE pipe can be ground simultaneously. This parallel processing method can significantly shorten the production cycle and improve production efficiency.

[0052] Drive Motor 2 is connected to the other end of the roller shaft via its output shaft. When Drive Motor 2 is activated, it rotates the roller shaft, which in turn drives the wire roller to perform the grinding operation. The bearing seat supports the roller shaft and allows it to rotate freely.

[0053] The wire roller is the actual grinding tool. It is composed of multiple fine steel wires with high hardness and wear resistance. As the roller shaft rotates, the wire roller rotates with it and grinds the surface of the PE pipe, removing burrs, oxide scale and other impurities on the surface, making the PE pipe surface smoother and more uniform.

[0054] In this embodiment, the grinding assembly 3, the pipe retaining rack 4 and the recovery mechanism 6 are sequentially distributed along the length of the crane 2, and the pipe retaining rack 4 is in an N-shape.

[0055] As a preferred embodiment, Figure 1 and Figure 6 As shown, the pipe blocking assembly 5 in this embodiment includes a body 51 embedded in the pipe blocking frame 4, a screw rod 52 is rotatably arranged inside the body 51, a screw nut 53 is threadedly connected to the outer side of the screw rod 52, a sliding rod 54 is arranged at one end of the screw nut 53, a wheel frame 55 is arranged at one end of the sliding rod 54, and a roller 56 is rotatably arranged on the wheel frame 55.

[0056] The body 51 is cylindrical, and a thrust bearing is provided at one end of the body 51 for rotating and supporting the screw rod 52 . The sliding rod 54 extends away from the screw nut 53 to the outside of the body 51 , and a handwheel is provided at the other end of the screw rod 52 .

[0057] The pipe retaining assembly 5 is embedded in the pipe retaining frame 4 and, as an independent module, can closely cooperate with the pipe retaining frame 4 to provide positioning for the PE pipe.

[0058] The body 51 serves as the main body of the retaining tube assembly 5 and houses key components such as the screw 52. The thrust bearing is used to rotationally support the screw 52. The thrust bearing can withstand the axial and radial forces generated by the screw 52 during rotation, ensuring smooth rotation of the screw 52.

[0059] A screw shaft 52 is rotatably mounted within the housing 51. Rotating the screw shaft 52 drives a screw nut 53, which is threadedly connected to it, into linear motion. The screw nut 53 is threadedly connected to the screw shaft 52 and internally connected to one end of a sliding rod 54. As the screw shaft 52 rotates, the screw nut 53 moves linearly along the axis of the screw shaft 52, thereby moving the sliding rod 54 and the wheel frame 55 together.

[0060] One end of the sliding rod 54 is connected to the screw nut 53, and the other end extends to the outside of the body 51 and is connected to the wheel frame 55. The sliding rod 54 is responsible for transmitting the linear motion of the screw nut 53 to the wheel frame 55.

[0061] The wheel frame 55 is used to install the roller 56. The roller 56 is rotatably arranged on the wheel frame 55 and contacts the surface of the PE pipe. The rotation of the roller 56 can reduce the friction resistance between the PE pipe.

[0062] The hand wheel is used as the operating part of the screw rod 52. By rotating the hand wheel, the screw rod 52 can be easily driven to rotate. This manual operation method is simple and intuitive, and is convenient for the operator to adjust the position of the pipe retaining assembly 5 according to actual conditions.

[0063] In one embodiment, Figure 3 and Figure 5 As shown, the recovery mechanism 6 in this embodiment includes a fan 61 arranged on the traveling crane 2, the air inlet of the fan 61 is provided with an air hood 62, the air outlet of the fan 61 is provided with an upper section air tube 63, the upper section air tube 63 is Y-shaped, and the other two ends of the upper section air tube 63 are provided with recovery tubes 64, and the upper and lower ends of the recovery tube 64 are respectively provided with a top ventilation bag 65 and a waste bag 66.

[0064] The recovery mechanism 6 is mounted on the trolley 2 so that it can move along with the movement of the trolley 2 to ensure effective coverage of the grinding area.

[0065] The fan 61 serves as a power source for the recovery mechanism 6 . The fan 61 generates suction to draw the debris and dust generated during the grinding process into the recovery system.

[0066] The induced air hood 62 is arranged at the air inlet of the fan 61. It guides the chips and dust generated by grinding into the fan 61 to improve the collection efficiency.

[0067] The upper section of the air cylinder 63 is Y-shaped. This design enables the air cylinder to be connected to two recovery cylinders 64 at the same time, thereby improving the recovery efficiency.

[0068] The recovery cylinder 64 is connected to the Y-shaped ends of the upper air cylinder 63. It serves as a main container for collecting debris and dust.

[0069] A top ventilation bag 65 is arranged on the top of the recovery drum 64. Allowing air to pass through, but preventing debris and dust particles. This ensures that the debris particles are collected in the waste bag 66.

[0070] The waste bag 66 is set at the bottom of the recycling drum 64. It collects the fine dust particles filtered by the top ventilation bag 65. The design of the waste bag 66 is easy to replace and clean to ensure the continuous and efficient operation of the recycling system.

[0071] It should be noted that, in this embodiment, two air volume valves are provided on the upper air cylinder 63 .

[0072] The two air volume valves control the amount of air diverted from the upper air cylinder 63 to the two recovery cylinders 64. By adjusting these two valves, the collection capacity of the two recovery cylinders 64 can be adjusted according to actual needs, ensuring that they can evenly or in a specific proportion collect the debris and dust generated during the grinding process.

[0073] In some cases, the debris and dust generated during the grinding process may be unevenly distributed, or the dust concentration near one recovery bin 64 may be higher than that near another. By adjusting the air volume valve, more air volume can be directed to the recovery bin 64 that requires more collection capacity, thereby improving overall collection efficiency.

[0074] If it is not necessary for both recovery drums 64 to operate at full capacity, the energy consumption of the blower can be reduced by closing or reducing the opening of one of the air volume valves, thereby reducing operating costs while ensuring the collection effect.

[0075] Air volume valves are typically designed to be manually or automatically adjustable. In manual adjustment mode, the operator can observe the collection status of the recovery drum 64 and manually adjust the valve opening to achieve optimal collection results. In automatic adjustment mode, the system may be equipped with sensors to monitor the dust concentration or air volume in the recovery drum 64 and automatically adjust the valve opening to maintain optimal collection conditions.

[0076] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0077] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0078] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A PE pipe grinding device, characterized in that: include: A track (1) and a trolley (2), wherein the trolley (2) moves along the length of the track (1), a grinding assembly (3) is relatively arranged on the trolley (2), and the grinding assembly (3) is used to grind the end of the PE pipe, a pipe retaining rack (4) is provided on the trolley (2), and a pipe retaining assembly (5) is relatively arranged on the pipe retaining rack (4), one end of the pipe retaining assembly (5) contacts the end of the PE pipe and is used to position the end of the PE pipe, and a recovery mechanism (6) is provided on the trolley (2), and the recovery mechanism (6) is used to absorb debris generated by grinding; The grinding assembly (3) comprises a mounting frame (31), a driving member (32) and a grinding machine (33); the mounting frame (31) is arranged on the crane (2); the grinding machine (33) is arranged on the mounting frame (31); the driving member (32) is connected to one end of the mounting frame (31); the driving member (32) is used to control the up and down movement of one end of the mounting frame (31) and adjust the inclination angle of the grinding machine (33).

2. A PE pipe grinding device according to claim 1, characterized in that: The traveling vehicle (2) comprises a bottom plate (21), a rotating shaft (22) is provided at the bottom of the bottom plate (21) for relative rotation, and walking rollers are provided at both ends of the rotating shaft (22); A fixing frame is provided on the bottom plate (21), a driving motor (23) is provided on the fixing frame, and an output shaft of the driving motor (23) is connected to one end of any rotating shaft (22).

3. A PE pipe grinding device according to claim 1, characterized in that: The mounting frame (31) includes a bracket (311) arranged on the vehicle (2), and a chassis (312) is rotatably arranged on the bracket (311); The driving member (32) is a cylinder, which is hingedly arranged on the crane (2), and the cylinder piston rod is hingedly connected to one end of the bottom of the chassis (312).

4. A PE pipe grinding device according to claim 1, characterized in that: The number of the grinding assemblies (3) is two, and the two grinding assemblies (3) are arranged oppositely on the traveling crane (2); The grinding machine (33) comprises: A second drive motor and a bearing seat are arranged on the crane (2), rotating a roller arranged on the bearing seat, a wire roller arranged at one end of the roller, and an output shaft of the second drive motor is connected to the other end of the roller.

5. The PE pipe grinding device according to claim 1, characterized in that: The grinding assembly (3), the pipe retaining frame (4) and the recovery mechanism (6) are sequentially distributed along the length of the crane (2), and the pipe retaining frame (4) is in an N-shape.

6. A PE pipe grinding device according to claim 1, characterized in that: The pipe retaining assembly (5) comprises a body (51) embedded in the pipe retaining frame (4), a screw rod (52) rotatably arranged inside the body (51), a screw nut (53) is threadedly connected to the outer side of the screw rod (52), a sliding rod (54) is arranged at one end of the screw nut (53), a wheel frame (55) is arranged at one end of the sliding rod (54), and a roller (56) is rotatably arranged on the wheel frame (55).

7. The PE pipe grinding device according to claim 1, characterized in that: The recovery mechanism (6) comprises a fan (61) arranged on the traveling crane (2); an air inlet of the fan (61) is provided with an air induced draft hood (62); an air outlet of the fan (61) is provided with an upper section air tube (63); the upper section air tube (63) is Y-shaped; recovery tubes (64) are provided at the other two ends of the upper section air tube (63); and a top ventilation bag (65) and a waste bag (66) are provided at the upper and lower ends of the recovery tube (64), respectively.

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