Polishing equipment for plastic pipe orifice treatment

Abstract

The invention belongs to the technical field of intelligent manufacturing equipment industry, and mainly relates to grinding equipment for plastic pipe orifice treatment. Comprising a main frame body, the main frame body is rotationally connected with a rotating frame, the rotating frame is slidably connected with a sliding block, the sliding block on the rotating frame rotates and is slidably connected with a sliding frame, the sliding frame is provided with a grinding module used for grinding a pipeline, and the sliding frame is slidably connected with a connecting frame; the sliding frame is rotatably connected with an adjusting screw in threaded connection with the connecting frame, the connecting frame is slidably connected with a supporting reed, a first elastic piece is arranged between the connecting frame and the supporting reed, and the main frame body is provided with a driving module used for driving the rotating frame to rotate. The polishing position of the pipeline is supported through the supporting reed, the shape of the polishing position of the pipeline is stabilized, the probability that the end opening of the to-be-polished pipeline is heated to deform is reduced, and the sealing strength during follow-up pipeline butt joint is improved.

Description

Technical Field

[0001] The present invention complies with the technical field of intelligent manufacturing equipment industry, and in particular is a polishing device for processing the pipe ends of plastic pipes. Background Art

[0002] Plastic pipes have been widely used in various fluid transportation systems in modern industrial and civil buildings due to their advantages such as light weight, corrosion resistance and convenient construction. These include indoor water supply and drainage, outdoor buried pipelines, and industrial environments with corrosive media such as chemical and electric power. However, although plastic pipes have good chemical stability and long service life, they are inevitably susceptible to aging, wear, embrittlement and other problems during long-term operation due to factors such as ambient temperature, pressure changes, and external forces. Therefore, individual pipes need to be replaced to ensure the safe and stable operation of the entire transportation system.

[0003] During the replacement of plastic pipes, the treatment of old pipe ports is particularly critical. To ensure the sealing of the connection parts, it is usually necessary to grind the inner and outer walls of the pipe ports to remove surface burrs, oxide layers and impurities, making them smooth and flat, thereby improving the fitting effect of the sealing ring or adhesive material and preventing leakage. However, during the grinding operation, a large amount of heat is generated due to friction, causing the local temperature of the pipe port to rise rapidly. For plastic pipes that have already aged and worn to a certain extent, high temperature can easily cause the material to soften or even deform, resulting in a decrease in the port dimensional accuracy and affecting the sealing performance of subsequent connections. Summary of the Invention

[0004] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides a grinding device for processing the pipe ends of plastic pipes.

[0005] The technical solution is: a grinding equipment for processing the pipe ends of plastic pipes, including a main frame, the main frame is rotatably connected to a rotating frame, the rotating frame is slidably connected to a slider, the slider on the rotating frame rotates and is slidably connected to the sliding frame, the sliding frame is provided with a grinding module for grinding pipes, the sliding frame is slidably connected to a connecting frame, the sliding frame is rotatably connected to an adjusting screw threadedly connected to the connecting frame, the connecting frame is slidably connected to a support spring, a first elastic member is provided between the connecting frame and the support spring, the main frame is provided with a driving module for driving the rotating frame to rotate, and the main frame is provided with a support assembly for supporting itself and aligning with the pipe.

[0006] As an improvement to the above solution, the connecting frame is slidingly connected with symmetrically distributed pressure plates, which are respectively located on both sides of the support spring. The pressure plates are used to squeeze the support spring to deform, and a second elastic member is provided between the pressure plates and the connecting frame.

[0007] As an improvement to the above solution, the support spring is a hollow structure, and evenly distributed heat dissipation fins are provided inside the support spring.

[0008] As an improvement to the above-mentioned solution, the support assembly includes an inner shaft, which is rotatably connected to the main frame body, the inner shaft is fixedly connected to a main gear, the main frame body is rotatably connected to circumferentially distributed sub-gears, the circumferentially distributed sub-gears are all engaged with the main gear, and the sub-gears are fixedly connected to a support rod.

[0009] As an improvement to the above solution, the main frame is provided with a blocking piece for blocking impurities in the pipeline.

[0010] As an improvement of the above-mentioned scheme, the sealing piece consists of an inner sleeve, a sealing spring, a sealing cloth and a telescopic rod. The inner sleeve is slidably connected to the main frame, the inner sleeve is fixedly connected to the fixed part of the telescopic rod, the telescopic end of the telescopic rod is fixedly connected to the middle part of the sealing spring, the inner sleeve and the sealing spring are jointly fixedly connected to the sealing cloth, and the main frame is provided with a control component for adjusting the curvature of the sealing spring.

[0011] As an improvement of the above solution, the control component includes a driving member, which is fixedly connected to the main frame. The output shaft of the driving member is fixedly connected to a roller, and both ends of the sealing spring are fixedly connected to the roller with a pull rope.

[0012] As an improvement to the above solution, the inner sleeve is fixedly connected to a limiting frame, and the pull rope passes through the limiting frame to uniformly control the bending degree of the sealing reed.

[0013] As an improvement to the above solution, the roller is provided with a slide groove, the inner sleeve is fixedly connected with a clamping block, and the clamping block slides in the slide groove, so that the inner sleeve drives the sealing spring to move along the pipeline through the telescopic rod.

[0014] As an improvement to the above solution, one side of the sealing reed is provided with a chamfer to facilitate scraping off impurities on the inner wall.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The present invention supports the polishing position of the pipe by supporting the spring, stabilizes the shape of the polishing position of the pipe, reduces the probability of thermal deformation at the end of the pipe to be polished, and improves the sealing strength during subsequent pipe docking.

[0017] 2. The support spring can adaptively fit the inner and outer walls of pipes of different diameters through deformation. At the same time, the support spring provides regional support around the grinding position of the pipe, dispersing the vibration generated during pipe grinding and improving the uniformity of pipe grinding. At the same time, the heat dissipation fins inside the support spring absorb the heat generated by pipe grinding, further reducing the probability of pipe deformation.

[0018] 3. The sealing reed is adaptively fitted to the lower half of pipes of different diameters, so that the sealing reed and the sealing cloth can block the lower half of the pipe, preventing the residual liquid in the pipe from flowing to the polishing position, thereby improving the polishing uniformity of the inner wall of the pipe.

[0019] 4. By pushing the sealing reed forward after it fits the pipe, impurities attached to the bottom of the pipe are scraped off, and the sealing reed fits the area where the impurities have been scraped off, the sealing strength of the sealing reed to the liquid in the pipe is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 Schematic diagram of the three-dimensional structure of the polishing module and the connecting frame of the present invention; Figure 3 Schematic diagram of the three-dimensional structure of the pressing plate of the present invention; Figure 4 Schematic diagram of the three-dimensional structure of the main gear and the auxiliary gear of the present invention; Figure 5 Schematic diagram of the three-dimensional structure of the blocking member of the present invention; Figure 6 Schematic diagram of the three-dimensional structure of the inner sleeve and the sealing reed of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the slide groove and the clamping block of the present invention.

[0021] The numbers in the figure are: 1-main frame, 2-rotating frame, 3-sliding frame, 4-grinding module, 5-connecting frame, 6-adjusting screw, 7-support spring, 8-driving module, 9-first elastic member, 10-pressing plate, 11-second elastic member, 201-inner shaft, 202-main gear, 203-secondary gear, 204-support rod, 300-blocking member, 301-inner sleeve, 302-sealing spring, 303-sealing cloth, 304-telescopic rod, 401-driving member, 402-roller, 403-pull rope, 404-limiting frame, 501-slide groove, 502-block. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] When replacing plastic pipes, the treatment of the old pipe ports is crucial. To ensure reliable sealing of the connection parts, the inner and outer walls of the ports usually need to be polished to remove burrs, oxide layers and impurities, improve surface flatness, enhance the adhesion of sealing rings or adhesives, and prevent leakage. However, the polishing process will generate a lot of heat due to friction, causing the local temperature of the port to rise rapidly. For aging or worn plastic pipes, high temperature can easily cause the material to soften or even deform, thereby affecting the port dimensional accuracy and sealing performance.

[0024] Example 1 This embodiment discloses a polishing device for processing the pipe ends of plastic pipes, which is used to polish and support the pipe ends.

[0025] like Figure 1-Figure 3 As shown, it includes a main frame 1, the main frame 1 is rotatably connected to a rotating frame 2, the rotating frame 2 is slidably connected to a slider, the slider on the rotating frame 2 rotates and is slidably connected to the sliding frame 3, the sliding frame 3 is provided with a grinding module 4 for grinding the pipe, the grinding module 4 is composed of a grinding roller and a servo motor, the servo motor is fixedly connected to the sliding frame 3, the output shaft of the servo motor is fixedly connected to the grinding roller, the sliding frame 3 slides along the slider on the rotating frame 2 to adapt to pipes of different diameters, and the sliding frame 3 can slide and rotate along the slider on the rotating frame 2 to change the grinding position of the grinding module 4 on the inner wall or outer wall of the pipe, the sliding frame 3 is slidably connected to the connecting frame 5, the sliding frame 3 is rotatably connected to an adjusting screw 6 threadedly connected to the connecting frame 5, and the adjusting screw 6 is used In order to make the connecting frame 5 slide along the sliding frame 3, the connecting frame 5 is slidably connected to the support spring 7, and a first elastic member 9 is arranged between the connecting frame 5 and the support spring 7. The first elastic member 9 is a tension spring, which is used to dynamically connect the support spring 7 and the connecting frame 5, so that the support spring 7 and the connecting frame 5 slide with each other, providing deformation space for the support spring 7. The main frame body 1 is provided with a driving module 8 for driving the rotating frame 2 to rotate. The driving module 8 is composed of a servo motor, a spur gear and a gear ring. The servo motor is fixedly connected to the main frame body 1, the spur gear is fixedly connected to the output shaft of the servo motor, and the gear ring is fixedly connected to the rotating frame 2. The spur gear is engaged with the gear ring, which can realize the rotation of the rotating frame 2 around the main frame body 1. The main frame body 1 is provided with a support component for supporting itself and aligning with the pipeline.

[0026] like Figure 2 and Figure 3As shown, the connecting frame 5 is slidably connected with two symmetrically distributed pressure plates 10, which are respectively located on both sides of the support spring 7. The pressure plate 10 is used to squeeze the support spring 7 to deform. A second elastic member 11 is provided between the pressure plate 10 and the connecting frame 5. The second elastic member 11 is a tension spring for dynamically connecting the support spring 7 and the pressure plate 10, so that the support spring 7 and the pressure plate 10 slide against each other, providing deformation space for the support spring 7. The elastic coefficient of the first elastic member 9 and the elastic coefficient of the second elastic member 11 are both greater than that of the support spring 7. The elastic coefficient causes the tensile force of the first elastic member 9 and the second elastic member 11 to deform the support spring 7. The support spring 7 is a hollow structure, and evenly distributed heat dissipation fins are provided inside the support spring 7 to absorb the heat generated at the pipe grinding site, further reducing the probability of deformation of the pipe due to heat. The deformation of the support spring 7 can adaptively fit the inner and outer walls of pipes of different diameters. At the same time, the support spring 7 surrounds the grinding module 4 to provide regional support for the grinding position of the pipe, disperse the vibration generated during pipe grinding, and improve the uniformity of pipe grinding.

[0027] like Figure 1 、 Figure 4 and Figure 5 As shown, the support assembly includes an inner shaft 201, which is rotatably connected to the main frame body 1, and the inner shaft 201 is fixedly connected to a main gear 202. The main frame body 1 is rotatably connected to three sub-gears 203 distributed at equal intervals in the circumferential direction, and the three sub-gears 203 distributed at equal intervals in the circumferential direction are all engaged with the main gear 202. The sub-gears 203 are fixedly connected to a support rod 204. In the initial state, the support rod 204 is retracted to one side close to the main frame body 1, and the three support rods 204 are synchronously deflected outward and contacted with the inner wall of the pipe, thereby forming a three-point centering and fixation for the device.

[0028] Working principle: When the pipeline needs to be maintained and polished, the staff places the device in the pipeline, and then rotates the inner shaft 201, so that the inner shaft 201 drives the main gear 202 thereon to rotate, and the main gear 202 drives the three circumferentially distributed sub-gears 203 to rotate synchronously, so that the sub-gears 203 drive the support rods 204 thereon to deflect, and so on until the three support rods 204 are in contact with the inner wall of the pipeline, at this moment forming three-point centering and support, so that the central axis of the main frame 1 coincides with the central axis of the pipeline to be polished, and the fixing operation of the device is completed at this moment.

[0029] After the device is fixed, preparations for pipe grinding are started. Since the grinding module 4 needs to grind the inner and outer walls of the pipe respectively, the grinding position is first explained as the inner wall of the pipe. The staff manipulates the sliding frame 3 to slide and rotate along the rotating frame 2 to adjust the position of the grinding module 4 so that the grinding module 4 fits the inner wall of the pipe. At this moment, the supporting spring 7 is located outside the pipe. Then the staff rotates the adjusting screw 6, and the adjusting screw 6 drives the connecting frame 5 to slide along the sliding frame 3, so that the connecting frame 5 drives the middle part of the supporting spring 7 through the first elastic member 9 to fit the outer wall of the pipe to form a support. The supporting spring 7 supports the grinding position of the pipe, stabilizes the shape of the pipe grinding position, reduces the probability of heat deformation at the pipe port, and improves the sealing strength during subsequent pipe docking.

[0030] When the middle part of the support spring 7 contacts the pipe, the staff continues to rotate the adjusting screw 6 to make the first elastic member 9 start to stretch. At this time, the connecting frame 5 drives the two symmetrically distributed pressure plates 10 to move synchronously, so that the two pressure plates 10 squeeze the two sides of the support spring 7 respectively, and the two sides of the support spring 7 bend inward until the support spring 7 is completely in contact with the outer wall of the pipe. The support spring 7 provides regional support around the grinding position of the pipe to disperse the vibration generated during the grinding of the pipe.

[0031] Similarly, when grinding the outer wall of the pipe, the staff makes the grinding module 4 fit with the outer wall of the pipe, and then rotates the adjusting screw 6 to make the support spring 7 close to the inner wall of the pipe. At this moment, the two ends of the support spring 7 first contact the inner wall of the pipe, and then the staff continues to rotate the adjusting screw 6 to make the adjusting screw 6 drive the middle part of the support spring 7 to fit the inner wall of the pipe through the connecting frame 5. At this moment, the second elastic member 11 begins to stretch until the support spring 7 fits to the inner wall of the pipe. The deformation of the support spring 7 can adaptively fit the inner and outer walls of pipes of different diameters. At the same time, the support spring 7 provides regional support for the grinding position of the pipe around the grinding module 4, disperses the vibration generated during pipe grinding, and improves the uniformity of pipe grinding. When the grinding module 4 and the support spring 7 are respectively fitted with the inner and outer walls of the pipe, the preparation for pipe grinding is completed.

[0032] When the preparation work for pipe grinding is completed, the grinding module 4 and the driving module 8 are turned on to start grinding the inner wall of the pipe. At the same time, the driving module 8 drives the rotating frame 2 to rotate, so that the grinding module 4 rotates synchronously, thereby achieving the grinding of the inner wall of the pipe. This is done until the pipe grinding is completed. During this period, the support spring 7 not only supports the pipe grinding position to suppress deformation, but also absorbs the heat generated by the pipe grinding and dissipates the heat through its internal heat dissipation fins, further reducing the probability of pipe deformation.

[0033] After the grinding of the pipeline is completed, the grinding module 4 and the driving module 8 are turned off, and the adjusting screw 6 is reset and rotated at the same time to separate the support spring 7 from the pipeline. At the same time, the first elastic member 9 or the second elastic member 11 is reset, and then the staff rotates the inner shaft 201 so that the inner shaft 201 drives the several support rods 204 to separate from the pipeline through the main gear 202 and the sub-gear 203. Then the staff takes the device out of the pipeline. When the pipeline needs to be maintained and ground again, the above steps are repeated.

[0034] When replacing an existing pipeline, polishing the inner wall of the old pipeline is a key step to ensure the tightness of the connection. However, the residual conveying liquid in the pipeline often continues to flow into the polishing area, causing the polishing tool to slip and affecting the uniformity of polishing. Especially in long-distance conveying systems, the residual liquid is difficult to completely empty in a short period of time, further increasing the difficulty of the polishing operation and affecting the construction quality and efficiency.

[0035] Example 2 The embodiment discloses a grinding device for processing the pipe ends of plastic pipes, which is further improved on the basis of the embodiment 1.

[0036] like Figure 1 、 Figure 5 and Figure 6 As shown, the main frame 1 is provided with a sealing member 300 for blocking impurities in the pipeline. The sealing member 300 is composed of an inner sleeve 301, a sealing spring 302, a sealing cloth 303 and a telescopic rod 304. The sealing spring 302 is elastic, and a rubber pad is provided on the side of the sealing spring 302 in contact with the pipeline to improve the sealing strength of the lower half of the pipeline. The inner sleeve 301 is slidably connected to the main frame 1, and the inner sleeve 301 is fixedly connected to the fixed part of the telescopic rod 304. The telescopic end of the telescopic rod 304 is fixedly connected to the middle part of the sealing spring 302. It is used to make the sealing reed 302 fit the pipe evenly from the middle, and adapt to pipes of different inner diameters through the deformation of the elastic sealing reed 302. The inner sleeve 301 and the sealing reed 302 are fixedly connected to the sealing cloth 303. The sealing cloth 303 is in a relaxed state to adapt to the change of the shape of the sealing reed 302. The main frame 1 is provided with a control component for adjusting the curvature of the sealing reed 302. The sealing reed 302 fits the lower half of the pipe to prevent the residual liquid in the pipe from flowing to the polishing position, thereby improving the polishing uniformity of the inner wall of the pipe.

[0037] like Figure 5 and Figure 6As shown, the control component includes a driving member 401, which is a servo motor. The driving member 401 is fixedly connected to the main frame 1, and the output shaft of the driving member 401 is fixedly connected to the roller 402. Both ends of the sealing spring 302 are fixedly connected to the roller 402 with a pull rope 403. The connection between the two pull ropes 403 and the roller 402 is located on the same side of the roller 402. The pull rope 403 is partially wound around the roller 402 in the initial state, and the sealing spring 302 is in a force-storing bending state. The inner sleeve 301 is fixedly connected to the limiting frame 404. The pull rope 403 passes through the limiting frame 404 and is used to evenly control the bending degree of the sealing spring 302. The limiting frame 404 is used to guide the running trajectory of the pull rope 403 to ensure that the two ends of the sealing spring 302 are evenly fitted to the inner wall of the pipe.

[0038] like Figure 7 As shown, the roller 402 is provided with a slide groove 501, and the axial length of the slide groove 501 is greater than the width of the sealing spring 302, which is used to ensure that the sealing spring 302 can still slide against the pipe after it is completely in contact with the inner wall of the pipe. The inner sleeve 301 is fixedly connected to a clamping block 502, and the clamping block 502 slides in the slide groove 501. The clamping block 502 drives the inner sleeve 301 to slide along the main frame 1 through the slide groove 501, so that the inner sleeve 301 drives the sealing spring 302 to move along the pipe through the telescopic rod 304. The sealing spring 302 is chamfered on the side facing the pipe port to facilitate scraping off impurities on the inner wall. The sealing spring 302 scrapes off impurities attached to the inside of the pipe and fits into the area after it has scraped off impurities from the pipe, thereby improving the sealing strength of the sealing spring 302 to the liquid in the pipe.

[0039] Working principle: When the device is placed in the pipeline, the bottom of the sealing member 300 is fitted into the inner bottom of the pipeline, that is, the telescopic end of the telescopic rod 304 contacts the inner bottom of the pipeline through the sealing spring 302, and then the device is fixed. When the device is fixed, the telescopic end of the telescopic rod 304 will stretch along its fixed part according to the inner diameter of the pipeline and adapt to the length of the inner diameter of the pipeline. At this time, the middle part of the sealing spring 302, that is, the connection between the telescopic end of the telescopic rod 304 and the sealing spring 302, fits into the bottom of the pipeline, and then the driving member 401 is turned on, so that the output shaft of the driving member 401 drives the roller 402 to rotate. The roller 402 rotates to release the two pull ropes 403 wrapped around it. As the two pull ropes 403 are released, the two ends of the sealing reed 302 gradually open and gradually fit the inner wall of the pipe until the sealing reed 302 is completely fitted to the inner wall of the pipe. At the same time, the sealing cloth 303 automatically adapts to the shape change of the sealing reed 302. At this moment, the sealing reed 302 fits the lower half of the pipe and cooperates with the sealing cloth 303 to block the lower half of the pipe, preventing the residual liquid in the pipe from flowing to the grinding position, thereby causing the grinding module 4 to slip when grinding the bottom of the pipe, resulting in uneven grinding of the pipe.

[0040] When the sealing reed 302 is in contact with the inner wall of the pipe, the output shaft of the driving member 401 drives the roller 402 to rotate and release the pull rope 403 thereon. During this process, the roller 402 drives the slide 501 thereon to rotate synchronously. The slide 501 drives the inner sleeve 301 to slide along the main frame 1 through the block 502. The inner sleeve 301 drives the sealing reed 302 to move synchronously through the limit frame 404 and the telescopic rod 304 thereon. The sealing reed 302 gradually fits the pipe and moves along the pipe, so that the sealing reed 302 moves toward the pipe end position to scrape off impurities attached to the inner wall of the pipe. When the sealing reed 302 is completely in contact with the pipe, the driving member 401 continues to drive the roller 402 to rotate, so that the sealing reed 302 fits the pipe as a whole, and then scrapes off impurities at the bottom of the pipe forward, so that the sealing reed 302 stays in the area after the impurities are scraped off, thereby improving the sealing strength of the sealing reed 302 to the liquid in the pipe.

[0041] When the grinding is completed, before rotating the inner shaft 201 to release the fixation of the device, first rotate the output shaft of the driving member 401 in the opposite direction, the roller 402 returns to its original position, and the two pull ropes 403 are wound up. At the same time, the inner sleeve 301 returns to its original position, and this process is repeated until the sealing spring 302 returns to its initial state. Then, the fixation of the device is released and the device is taken out of the pipeline. When the pipeline is ground again, repeat the above steps.

[0042] The above description is merely an example of the present invention and is not intended to limit the present invention. Any equivalent substitutions made within the principles of the present invention are intended to be included within the scope of protection of the present invention. Any content not elaborated in detail herein is already known to those skilled in the art.

Claims

1. A grinding device for processing the pipe ends of plastic pipes, comprising a main frame (1), wherein the main frame (1) is rotatably connected to a rotating frame (2), wherein the rotating frame (2) is slidably connected to a slider, wherein the slider on the rotating frame (2) is rotatably and slidably connected to a sliding frame (3), wherein the sliding frame (3) is provided with a grinding module (4) for grinding pipes, wherein the grinding device comprises: The sliding frame (3) is slidably connected to the connecting frame (5), the sliding frame (3) is rotatably connected to an adjusting screw (6) threadedly connected to the connecting frame (5), the connecting frame (5) is slidably connected to a supporting spring (7), a first elastic member (9) is provided between the connecting frame (5) and the supporting spring (7), the main frame body (1) is provided with a driving module (8) for driving the rotating frame (2) to rotate, and the main frame body (1) is provided with a supporting assembly for supporting itself and aligning with the pipeline.

2. A grinding device for treating the pipe ends of plastic pipes according to claim 1, characterized in that: The connecting frame (5) is slidably connected to symmetrically distributed pressure plates (10), which are respectively located on both sides of the supporting spring (7). The pressure plates (10) are used to squeeze the supporting spring (7) to deform, and a second elastic member (11) is provided between the pressure plates (10) and the connecting frame (5).

3. The grinding device for treating the pipe ends of plastic pipes according to claim 1, characterized in that: The supporting spring (7) is a hollow structure, and evenly distributed heat dissipation fins are provided inside the supporting spring (7).

4. The grinding device for treating the pipe ends of plastic pipes according to claim 1, characterized in that: The support assembly includes an inner shaft (201), the inner shaft (201) is rotatably connected to the main frame (1), the inner shaft (201) is fixedly connected to a main gear (202), the main frame (1) is rotatably connected to circumferentially distributed sub-gears (203), the circumferentially distributed sub-gears (203) are all meshed with the main gear (202), and the sub-gears (203) are fixedly connected to a support rod (204).

5. The grinding device for treating the pipe ends of plastic pipes according to claim 4, characterized in that: The main frame (1) is provided with a blocking piece (300) for blocking impurities in the pipeline.

6. The grinding device for treating the pipe ends of plastic pipes according to claim 5, characterized in that: The sealing member (300) is composed of an inner sleeve (301), a sealing spring (302), a sealing cloth (303) and a telescopic rod (304); the inner sleeve (301) is slidably connected to the main frame (1); the inner sleeve (301) is fixedly connected to the fixed portion of the telescopic rod (304); the telescopic end of the telescopic rod (304) is fixedly connected to the middle portion of the sealing spring (302); the inner sleeve (301) and the sealing spring (302) are fixedly connected to the sealing cloth (303); and the main frame (1) is provided with a control component for adjusting the curvature of the sealing spring (302).

7. The grinding device for treating the pipe ends of plastic pipes according to claim 6, characterized in that: The control component includes a driving member (401), the driving member (401) is fixedly connected to the main frame (1), the output shaft of the driving member (401) is fixedly connected to a roller (402), and a pull rope (403) is fixedly connected between both ends of the sealing spring (302) and the roller (402).

8. The grinding device for treating the pipe ends of plastic pipes according to claim 7, characterized in that: The inner sleeve (301) is fixedly connected to the limiting frame (404), and the pull rope (403) passes through the limiting frame (404) to uniformly control the bending degree of the sealing reed (302).

9. The grinding device for treating the pipe ends of plastic pipes according to claim 7, characterized in that: The rotating roller (402) is provided with a slide groove (501), and the inner sleeve (301) is fixedly connected with a clamping block (502). The clamping block (502) slides in the slide groove (501), so that the inner sleeve (301) drives the sealing spring (302) to move along the pipeline through the telescopic rod (304).

10. The grinding device for treating the pipe ends of plastic pipes according to claim 9, characterized in that: One side of the sealing reed (302) is provided with a chamfer to facilitate scraping away impurities on the inner wall.

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