A plastic pipe inner wall grinding device

Abstract

The present invention relates to the technical field of pipe inner wall grinding, and more specifically, to a plastic pipe inner wall grinding device. It comprises a sliding ring slidably arranged on a mounting tube, an inflatable bag is connected to the right side of the sliding ring, the right end of the inflatable bag is connected to the mounting tube, a fixedly arranged electric push rod 2 and a slidably arranged air pump are also fixedly installed on the mounting tube, the telescopic end of the electric push rod 2 is connected to the sliding ring, and a connecting pipe is connected between the air outlet of the air pump and the inflatable bag. The present invention cooperates with the arrangement of a moving part, a telescopic grinding block and a centralized mechanism to achieve adaptive adjustment to different pipe diameters. In addition, an inflatable bag with a concave shape is designed to adjust and fit the pipeline to achieve efficient pushing out of grinding chips, which not only enhances the flexibility and adaptability of the equipment, but also realizes the integration of cleaning and grinding, so that the device can be operated more easily, thereby improving the overall use effect and work efficiency of the device.

Description

Technical Field

[0001] The invention relates to the technical field of pipe inner wall grinding, and in particular to a plastic pipe inner wall grinding device. Background Art

[0002] The inner wall of plastic pipes is usually polished to improve the smoothness of the inner surface of the pipe, which not only helps to reduce the friction resistance of the fluid during the flow process, but also effectively prevents the adhesion of sediment, thereby improving the fluid transmission efficiency and ensuring the quality of the transmission medium.

[0003] At present, the grinding of the inner wall of plastic pipes mainly relies on two methods: manual and mechanical. In mechanical grinding technology, there are two common implementation methods: one is to fix the pipe and use the grinding equipment at one end to work deep inside the pipe; the other is to use an integrated grinding device, which can autonomously enter the pipe to perform grinding operations. However, the first method is not suitable for longer pipes due to the length limitation of the driving components of the grinding equipment; and although the second method has high flexibility, its adaptability and compatibility become a major challenge for pipes of different specifications and diameters. In addition, for longer pipes, the cleaning and treatment of the grinding chips generated during the grinding process is also a complicated task, which will increase the complexity and cost of the pipe grinding work. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a plastic pipe inner wall grinding device that can adapt to pipes of various different diameters and integrates grinding and cleaning functions, aiming to improve the technical level of plastic pipe inner wall grinding, while ensuring easy operation, and also striving to simplify the operating process and reduce maintenance costs.

[0005] The technical solution is: the present invention provides a plastic pipe inner wall grinding device, comprising:

[0006] The installation cylinder is a hollow cylinder;

[0007] The motor is fixedly mounted on the left end of the mounting tube;

[0008] A connecting shaft is connected to the output end of the motor through a coupling, and the end of the connecting shaft passes through the right end of the mounting cylinder;

[0009] A plate sleeve is arranged at the end of the connecting shaft, and a telescopic plate is slidably arranged at both ends of the plate sleeve, and the telescopic plate can be fixed on the plate sleeve by bolts, and a grinding block for grinding the inner wall of the tube is arranged on each of the two telescopic plates;

[0010] A moving part, arranged on the surface of the mounting cylinder, for pushing the device to move in the pipeline;

[0011] A centralizing mechanism is arranged at the left end of the mounting tube, and includes a sliding ring slidably arranged on the mounting tube, an inflatable bag is connected to the right side of the sliding ring, and the right end of the inflatable bag is connected to the mounting tube. A fixed electric push rod 2 and a slidable air pump are also fixedly installed on the mounting tube, and the telescopic end of the electric push rod 2 is connected to the sliding ring, and a connecting pipe is connected between the air outlet of the air pump and the inflatable bag; the inflatable bag has a fitting ring with a maximum diameter to adapt to the inner diameter of the fitting pipeline, and is driven by the electric push rod 2 so that the central area of ​​the left end of the inflatable bag forms an inner concave surface, and the annular area except the central area forms an arc surface arched to the left.

[0012] Preferably, the moving part includes an electric push rod installed on a mounting cylinder, a hinge seat slidably matched with the mounting cylinder is sleeved on the mounting cylinder, the hinge seat is connected to the telescopic end of the electric push rod, at least four scissor frames are arranged at intervals along the circumferential direction on the mounting cylinder, the bottom ends of the scissor frames are respectively hingedly connected to the hinge seat and the mounting cylinder, a mounting seat is arranged on the top of the scissor frames, and a track assembly that fits the inner wall of the pipe is arranged on the mounting seat.

[0013] Preferably, grooves are arranged on the surface of the track of the track assembly, suitable for grasping the inner wall of the tube to push the device to move.

[0014] Preferably, a reversing mechanism for reverse grinding is provided on the mounting cylinder, and the reversing mechanism includes an outer cylinder arranged on the mounting cylinder, a bevel gear 1 connected to the connecting shaft is provided in the outer cylinder, and a bevel gear 2 is symmetrically rotatably provided on the outer cylinder, and the two bevel gears 2 are respectively meshed with one side of the bevel gear 1, and a bevel gear 3 located on the right side of the bevel gear 1 is also connected to the connecting shaft, and the two sides of the bevel gear 3 are respectively meshed with the two bevel gears 2, and a grinding assembly located close to the plate sleeve is also provided on the bevel gear 3, and the grinding assembly consists of a plate sleeve, a telescopic plate and a grinding block.

[0015] Preferably, a cleaning mechanism for cleaning wear debris is provided on the mounting seat, and the cleaning mechanism includes a connecting plate symmetrically arranged at one end of the mounting seat, a motor is installed on one connecting plate, and a cleaning brush connected to the output shaft of the motor on the same side is rotatably arranged between the two connecting plates, and the cleaning brush is in contact with the track surface of the corresponding track assembly.

[0016] Preferably, a storage mechanism for storing the inflatable bag is provided on the mounting tube, and the storage mechanism includes support seats symmetrically arranged on the mounting tube, a ring is arranged between the two support seats, and a clamping plate is respectively passed through the two support seats, and the clamping plate is slidably matched with the support seat on the same side, and a ring is arranged between the left ends of the two clamping plates, and the clamping plates on both sides are attached to the deflated inflatable bag so as to be clamped and stored by the ring.

[0017] Preferably, the storage mechanism further comprises an insertion rod respectively inserted into the support seats on both sides, an elastic member is further provided between the two insertion rods and the support seats, and the insertion rod forms an insertion fit with the card plate on the same side.

[0018] Preferably, both ends of the plate sleeve and the telescopic plate are provided with arranged threaded holes suitable for inserting bolts to fix the position between the plate sleeve and the telescopic plate.

[0019] The present invention overcomes the shortcomings of the prior art and can achieve the following beneficial effects:

[0020] 1. The present invention realizes adaptive adjustment to different pipe diameters by setting a moving part, a telescopic grinding block and a centralized mechanism. The moving part utilizes a telescopic scissor frame structure to automatically expand or contract according to the pipe diameter to ensure optimal positioning to stabilize the extension movement of the device; in addition, the grinding block adjusts its length to adapt to different working environments through the sliding mechanism of the telescopic plate and the plate sleeve; in addition, an inwardly concave inflatable bag is designed, and the fitting circle of the inflatable bag is controlled by an electric push rod to change, thereby adjusting and adapting to the fitting pipe to achieve efficient pushing out of grinding chips, which not only enhances the flexibility and adaptability of the equipment, but also realizes the integration of cleaning and grinding, making the device easier to operate, thereby improving the overall use effect and work efficiency of the device.

[0021] 2. The present invention introduces a reversing mechanism, which operates through the mutually meshing bevel gears to achieve the reverse rotation of the grinding assembly relative to another set of grinding components. The reverse rotation design can achieve bidirectional grinding and make the grinding area present a more uniform effect. In addition, bidirectional grinding can disperse the vibration or tremor caused by continuously applying force in one direction, thereby improving the stability of the device.

[0022] 3. The present invention adds a cleaning mechanism, which drives the cleaning brush to rotate by a motor to clean the track assembly in real time, thereby ensuring the cleanliness of the track assembly during operation, thereby maintaining good grip and movement stability of the device.

[0023] 4. The present invention also provides a storage mechanism, and utilizes the cardboard structure on both sides together with the ring to conveniently fold and store the inflatable bag when not in use, which not only saves storage space but also facilitates the transportation and storage of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0025] Figure 2 It is a three-dimensional structural schematic diagram of components such as the plate sleeve, the telescopic plate and the grinding block of the present invention.

[0026] Figure 3 It is a three-dimensional structural schematic diagram of each component of the moving part of the present invention.

[0027] Figure 4It is a three-dimensional structural cross-sectional view of each component of the centralizing mechanism of the present invention.

[0028] Figure 5 It is a schematic diagram of the three-dimensional structure of the inflatable bag of the present invention.

[0029] Figure 6 It is a three-dimensional structural cross-sectional view of each component of the reversing mechanism of the present invention.

[0030] Figure 7 It is a three-dimensional structural schematic diagram of each component of the cleaning mechanism of the present invention.

[0031] Figure 8 It is a three-dimensional structural cross-sectional view of each component of the storage mechanism of the present invention.

[0032] Fig. 9 It is a schematic diagram of the storage mechanism of the present invention in use.

[0033] The marks in the accompanying drawings provided by the present invention are: 1-installing cylinder, 2-motor, 3-connecting shaft, 4-plate sleeve, 41-telescopic plate, 42-grinding block, 5-moving part, 51-electric push rod one, 52-hinge seat, 53-scissors frame, 54-mounting seat, 55-track assembly, 551-groove, 6-centralizing mechanism, 61-inflatable bag, 611-fitting ring, 612-arc surface, 613-inner concave surface, 62-air pump, 63-connecting pipe, 64-sliding ring, 65-electric push rod two, 7-reversing mechanism, 71-outer cylinder, 72-bevel gear one, 73-bevel gear two, 74-bevel gear three, 75-grinding assembly, 8-cleaning mechanism, 81-connecting plate, 82-motor, 83-cleaning brush, 9-storage mechanism, 91-support seat, 92-clip plate, 93-ring, 94-insertion rod, 95-elastic part. DETAILED DESCRIPTION

[0034] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0035] In addition, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. It should be noted that the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] Embodiment: A plastic pipe inner wall grinding device, such as Figure 1-Figure 5 As shown, including:

[0037] The installation cylinder 1 is a hollow cylinder, which serves as a mounting carrier for the various components of the device;

[0038] The motor 2 is fixedly mounted on the left end of the mounting tube 1, and its output shaft is arranged to face right;

[0039] The connecting shaft 3 is connected to the output end of the motor 2 through a coupling, and the end of the connecting shaft 3 passes through the right end of the mounting tube 1;

[0040] The plate sleeve 4 is arranged at the end of the connecting shaft 3. A telescopic plate 41 is respectively penetrated and slidably arranged at the left and right ends of the plate sleeve 4. Arranged threaded holes are provided on both ends of the plate sleeve and the telescopic plate, so that the telescopic plate 41 can be fixed on the plate sleeve 4 by bolts. A grinding block 42 for grinding the inner wall of the pipe is respectively arranged on the two telescopic plates 41, so that the extension length of the grinding block 42 can be adjusted by sliding and telescoping to adapt to the inner wall grinding of pipes with different diameters, so as to achieve the effect of improving the adaptability of the device;

[0041] The moving part 5 is arranged on the surface of the mounting tube 1 to push the device to move in the pipeline, so that the entire device can move by grasping the inner wall through the moving part 5, so that the device can adapt to a wider range of pipeline grinding lengths and inner diameters;

[0042] The centralizing mechanism 6 is arranged at the left end of the mounting tube 1. The centralizing mechanism 6 includes a sliding ring 64 slidably arranged on the left side of the mounting tube 1. The sliding ring 64 slides in the left and right directions on the mounting tube 1. A plastic inflatable bag 61 is connected to the right side of the sliding ring 64. The inflatable bag 61 has a certain hardness, so that it is not easy to wrinkle. The cross-section of the inflatable bag 61 facing left is always circular, so as to be suitable for completely fitting the shape of the inner wall of the tube to facilitate the movement of the inflatable bag 61, and nylon fiber can be laid on the surface of the inflatable bag 61 to ensure that the surface of the inflatable bag 61 is smooth enough and is not easy to contact and squeeze the inner wall of the tube. The right end of the inflatable bag 61 is connected to the mounting tube 1. There is a certain distance between the left and right ends of the inflatable bag 61, so that the internal inflation space of the inflatable bag 61 can be changed by the movement of the sliding ring 64, and then the inflation amount presented by the inflatable bag 61 will also change accordingly. A fixedly arranged electric push rod 2 65 and a sliding arrangement are also fixedly installed on the mounting tube 1. The air pump 62 is provided, and the telescopic end of the electric push rod 65 is connected to the sliding ring 64, so that the movement of the sliding ring 64 can be automated. A connecting pipe 63 is connected between the air outlet of the air pump 62 and the inflatable bag 61, so that the inflatable bag 61 can be inflated and exhausted through the air pump 62 to stabilize the filling state of the inflatable bag 61; the inflatable bag 61 has a fitting ring 611 with a maximum diameter to fit the inner diameter of the fitting tube, and is driven by the electric push rod 65 so that the left end center area of ​​the inflatable bag 61 The domain forms an inner concave surface 613, and the annular area outside the central area forms an arc surface 612 that arches to the left. The diameter of the inflatable bag 61 can be adjusted by moving the sliding ring 64 to ensure that the diameter of the fitting ring 611 can be adapted to the inner diameter of the pipe, so that the inflatable bag 61 can be adapted to the cleaning of pipes of different diameters. The synchronous operation of the device and the inflatable bag 61 can integrate the cleaning and polishing operations, simplify the operating process, and improve work efficiency.

[0043] like Figure 1 , Figure 3 and Figure 7 As shown, the moving part 5 includes an electric push rod 51 installed on the mounting tube 1, and the mounting tube 1 is sleeved with an articulated seat 52 that slides with the electric push rod 51, and the articulated seat 52 is connected to the telescopic end of the electric push rod 51. Four scissor frames 53 are arranged on the mounting tube 1 along the circumferential interval, and the bottom ends of the scissor frames 53 are respectively hingedly connected to the articulated seat 52 and the mounting tube 1, and a mounting seat 54 is arranged on the top of the scissor frames 53. The mounting seat 54 is provided with a crawler assembly 55 that fits the inner wall of the pipe. The lifting and lowering adjustment of the scissor frames 53 can be used to adjust the extension distance of the crawler assembly 55 according to the pipe diameter, so that the device can adapt to pipes with different pipe diameters to achieve movement, and grooves 551 are arranged on the crawler surface of the crawler assembly 55, which can improve the grip, so that the crawler of the crawler assembly 55 can fit and grip the inner wall of the pipe more firmly to push the device to achieve movement.

[0044] like Figure 1 and Figure 6 As shown, a reversing mechanism 7 for reverse grinding is provided on the mounting cylinder 1, and the reversing mechanism 7 includes an outer cylinder 71 arranged on the mounting cylinder 1, and a bevel gear 1 72 connected to the connecting shaft 3 is arranged in the outer cylinder 71, and a bevel gear 2 73 is symmetrically rotated on the outer cylinder 71, and the two bevel gears 2 73 are respectively meshed with one side of the bevel gear 1 72, and a bevel gear 3 74 located on the right side of the bevel gear 1 72 is also connected to the connecting shaft 3, and the two sides of the bevel gear 3 74 are respectively meshed with the two bevel gears 2 73, and a grinding assembly 75 located near the plate sleeve 4 is also provided on the bevel gear 3 74. The grinding assembly 75 is composed of the plate sleeve 4, the telescopic plate 41 and the grinding block 42, forming another integrated grinding component. The design of the reversing mechanism 7 realizes the bidirectional rotation of the two-part grinding block 42, so that the grinding effect of the inner wall of the pipe wall is more uniform, and the grinding quality is improved. At the same time, the bidirectional grinding can also disperse the vibration or vibration caused by continuously applying force in one direction, thereby offsetting the torque and improving the stability of the device.

[0045] like Figure 1 and Figure 7 As shown, a cleaning mechanism 8 for cleaning grinding chips is provided on the mounting seat 54, and the cleaning mechanism 8 includes a connecting plate 81 symmetrically arranged at one end of the mounting seat 54, a motor 82 is installed on one side of the connecting plate 81, and a cleaning brush 83 connected to the output shaft of the motor 82 on the same side is rotatably provided between the two connecting plates 81. The cleaning brush 83 contacts the track surface of the corresponding track assembly 55, which helps to remove the generated grinding chips in time during the grinding process, prevent the accumulation of grinding chips from affecting the fitting effect of the track assembly 55 and the inner wall of the pipe, thereby stabilizing the movement of the stabilizer, reducing the workload of subsequent cleaning, and correspondingly reducing the cost of later maintenance.

[0046] like Figure 8 and Fig. 9 As shown, a storage mechanism 9 for storing the inflatable bag 61 is provided on the mounting tube 1. The storage mechanism 9 includes a support seat 91 symmetrically arranged on the mounting tube 1. A clamping plate 92 is respectively inserted on the two support seats 91. The clamping plate 92 is slidably matched with the support seat 91 on the same side. A ring 93 is provided between the two clamping plates 92. The clamping plates 92 on both sides fit the deflated inflatable bag 61, so that the inflatable bag 61 can be clamped and stored by the ring 93, so that the position of the inflatable bag 61 can be more concentrated, so that the inflatable bag 61 can be conveniently folded together with the device when not in use, saving space and providing corresponding portability for transportation and storage. At the same time, in the process of deflation of the inflatable bag 61, the compression of the clamping plate 92 and the inflatable bag 61 can also assist the exhaust efficiency, thereby improving the convenience of operation of the device.

[0047] like Figure 8 and Fig. 9 As shown, the storage mechanism 9 also includes an insertion rod 94 respectively inserted into the support seats 91 on both sides, and an elastic member 95 is also provided between the two insertion rods 94 and the support seats 91. In the present embodiment, the elastic member 95 is a spring, which can assist the insertion rod 94 in realizing the reset operation, and the insertion rod 94 forms a plug-in fit with the card plate 92 on the same side, which can realize the insertion-type position fixation of the displaced card plate 92 to prevent the position from being misplaced and offset.

[0048] When it is necessary to grind the inner wall of the plastic pipe, the device can be used. First, the position of all the grinding components 75 is adjusted according to the diameter of the grinding pipe, and the telescopic plates 41 on both sides are pushed to slide on the plate sleeve 4, so that the distance between the grinding block 42 and the plate sleeve 4 is changed. After the position adjustment is completed, the position between the telescopic plates 41 and the corresponding plate sleeve 4 is fixed with bolts, and then the right end of the device is extended into the pipe, and the grinding blocks 42 on both sides are in contact with the inner wall of the pipe, and then the electric push rod 1 51 is started. The electric push rod 1 51 pushes the articulated seat 52 to move left and right on the mounting tube 1, thereby driving the scissor frames 53 around it to perform corresponding lifting operations, thereby driving the mounting seat 54 and the crawler assembly 55 to move synchronously, and when the crawler part of the crawler assembly 55 is in contact with the inner wall of the pipe, the crawler assembly 55 is started, and as the crawler rotates, the Grasp the inner wall of the pipe and rotate continuously to push the device to move right into the pipe. From then on, the motor 2 is started, and the motor 2 drives the connected connecting shaft 3 to rotate, thereby driving the plate sleeve 4 to rotate synchronously, so that the grinding block 42 can fit the inner wall of the pipe for circumferential grinding. Here, as the connecting shaft 3 rotates, the bevel gear 1 72 will be driven to rotate synchronously, and mesh with the bevel gear 2 73 on both sides, thereby driving the two bevel gears 2 73 to rotate in opposite directions, and then mesh with the bevel gear 3 74, thereby driving the bevel gear 3 74 to rotate in the opposite direction relative to the bevel gear 1 72, so that the grinding assembly 75 and the other grinding components show an opposite rotation trend, and the inner wall of the pipe is polished in this two-way rotation to achieve a more uniform grinding effect, and offset the torque, reduce the vibration and tremor caused by the movement, thereby stabilizing the movement of the device.

[0049] During the grinding process, the generated grinding chips will accumulate in the pipeline, so the pipeline needs to be cleaned of grinding chips, especially for the grinding of longer pipelines, where the cleaning of grinding chips becomes more difficult. In this process, the inflatable bag 61 is first adjusted according to the inner diameter of the pipeline. If the diameter of the pipeline is larger, the electric push rod 65 is started to push the sliding ring 64 to move left, and the inflatable bag 61 is inflated by the air pump 62 at the same time. Due to the push of the sliding ring 64, the connecting pipe 63 and the air pump 62 are driven to slide left on the installation tube 1, and then the inner diameter of the inflatable bag 61 is increased. As the space at the inner part of the airbag 61 becomes larger, the airflow continuously inflates the airbag 61 to fill the extra space, so that the curvature of the inner concave surface 613 and the curved surface 612 of the airbag 61 gradually becomes gentle, and then the left end of the airbag 61 becomes smoother, and the fitting circle 611 of the airbag 61 also expands accordingly, thereby changing the maximum diameter of the airbag 61 to form a diameter that can adapt to the inner diameter of the tube, and then the above operation can be stopped, so that the airbag 61 maintains this filling state; on the contrary, if the inner diameter of the tube is smaller, the sliding ring 64 is driven by the electric push rod 2 65 The air bag 61 moves rightward, thereby pulling the inner concave surface 613 of the air bag 61 to gradually extend and recess rightward, and then pulling the connecting pipe 63 and the air pump 62 to move rightward, so that the internal space of the air bag 61 is squeezed. To ensure the normal filling state of the air bag 61, a certain amount of gas is discharged outward through the air pump 62, so as to stabilize the internal air pressure of the air bag 61. The fitting ring 611 of the air bag 61 is pulled as the sliding ring 64 moves rightward, so that the fitting ring 611 gradually shrinks, and the diameter of the air bag 61 is reduced. After the adapted diameter is adjusted, the operation stops; The inflatable bag 61 will enter the inner wall of the pipe as the device moves, because the fitting ring 611 of the inflatable bag 61 is adapted to the inner diameter of the pipe, so that the inflatable bag 61 will not be mismatched or squeezed due to the pipe diameter problem during movement. It is ensured that the inflatable bag 61 will fit the inner wall of the pipe with a slight gap while maintaining non-contact with the inner wall of the pipe, so that the overall fit and adaptability of the inflatable bag 61 are correspondingly improved, so that the inflatable bag 61 is used to cooperate with the movement of the device to push out the accumulated grinding chips, thereby achieving an integrated mobile operation of grinding and cleaning.

[0050] As the crawler assembly 55 is continuously pushed, the device gradually moves from the left end to the right end of the pipeline. At the same time, in order to ensure the cleanliness of the contact surface of the crawler assembly 55, the motor 82 can be started to drive the cleaning brush 83 to fit the crawler on the corresponding crawler assembly 55 to clean the debris. Finally, after the device moves out of the pipeline, the inner wall of the pipeline is also polished, and the grinding debris will be pushed out with the moving air bag 61. From then on, the grinding of the inner wall of the pipe and the cleaning of the grinding debris are completed. When the device is collected, the gas inside the air bag 61 can be discharged through the air pump 62, and then the plug rods 94 on both sides are moved to disengage from the card plate. 92, and the elastic member 95 is deformed accordingly, and then the card plates 92 on both sides are pushed to move leftward, so that the card plates 92 slide leftward on the support seat 91, and pull the connected ring 93 to be sleeved on the position of the air bag 61, and squeeze the air bag 61, so as to cover and fix the deflated air bag 61, and then release the insertion rod 94, the elastic member 95 is reset accordingly, and the insertion rod 94 is inserted into the card plate 92, so as to fix the position of the card plate 92, and the air bag 61 is directly placed between the two card plates 92 and the ring 93, so as to centrally store the deflated air bag 61.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A plastic pipe inner wall grinding device, characterized in that: include: The installation cylinder (1) is a hollow cylinder; A motor (2) is fixedly mounted on the left end of the mounting tube (1); A connecting shaft (3) is connected to the output end of the motor (2) through a coupling, and the end of the connecting shaft (3) passes through the right end of the mounting tube (1); A plate sleeve (4) is arranged at the end of the connecting shaft (3), and a telescopic plate (41) is slidably arranged at each end of the plate sleeve (4), and the telescopic plate (41) can be fixed to the plate sleeve (4) by bolts, and a grinding block (42) for grinding the inner wall of the tube is respectively arranged on the two telescopic plates (41); A moving part (5) is arranged on the surface of the mounting tube (1) and is used to push the device to move in the pipeline; A centralizing mechanism (6) is arranged at the left end of the mounting tube (1). The centralizing mechanism (6) comprises a sliding ring (64) slidably arranged on the mounting tube (1). The right side of the sliding ring (64) is connected to an inflatable bag (61). The right end of the inflatable bag (61) is connected to the mounting tube (1). A fixedly arranged electric push rod (65) and a slidably arranged air pump (62) are also installed on the mounting tube (1). The telescopic end of the electric push rod (65) is connected to the sliding ring (64). A connecting pipe (63) is connected between the air outlet of the air pump (62) and the inflatable bag (61). The inflatable bag (61) has a fitting ring (611) with a maximum diameter so as to fit the inner diameter of the pipe. The inflatable bag (61) is driven by the electric push rod (65) so that the central area of ​​the left end of the inflatable bag (61) forms an inner concave surface (613), and the annular area other than the central area forms an arc surface (612) arched to the left. The moving part (5) comprises an electric push rod (51) mounted on the mounting tube (1); a hinge seat (52) is sleeved on the mounting tube (1) and is slidably matched with the electric push rod; the hinge seat (52) is connected to the telescopic end of the electric push rod (51); at least four scissor frames (53) are arranged at intervals along the circumferential direction on the mounting tube (1); the bottom ends of the scissor frames (53) are respectively hingedly connected to the hinge seat (52) and the mounting tube (1); a mounting seat (54) is arranged on the top end of the scissor frames (53); and a crawler assembly (55) is arranged on the mounting seat (54) and is in contact with the inner wall of the tube; The mounting cylinder (1) is provided with a reversing mechanism (7) for reverse grinding. The reversing mechanism (7) comprises an outer cylinder (71) arranged on the mounting cylinder (1). A bevel gear 1 (72) connected to the connecting shaft (3) is arranged inside the outer cylinder (71). A bevel gear 2 (73) is symmetrically rotatably arranged on the outer cylinder (71). The two bevel gears 2 (73) are respectively meshed with one side of the bevel gear 1 (72). A bevel gear 3 (74) located on the right side of the bevel gear 1 (72) is also connected to the connecting shaft (3). Both sides of the bevel gear 3 (74) are respectively meshed with the two bevel gears 2 (73). A grinding assembly (75) located near the plate sleeve (4) is also provided on the bevel gear 3 (74). The grinding assembly (75) is composed of the plate sleeve (4), the telescopic plate (41) and the grinding block (42).

2. A plastic pipe inner wall grinding device according to claim 1, characterized in that: Grooves (551) are arranged in an array on the crawler surface of the crawler assembly (55).

3. A plastic pipe inner wall grinding device according to claim 2, characterized in that: A cleaning mechanism (8) for cleaning wear debris is provided on each mounting seat (54), the cleaning mechanism (8) comprising a connecting plate (81) symmetrically arranged at one end of the mounting seat (54), a motor (82) being mounted on one connecting plate (81), a cleaning brush (83) connected to an output shaft of the motor (82) on the same side being rotatably arranged between the two connecting plates (81), the cleaning brush (83) being in contact with a track surface of a corresponding track assembly (55).

4. A plastic pipe inner wall grinding device according to claim 3, characterized in that: The mounting tube (1) is provided with a storage mechanism (9) for storing the inflatable bag (61), the storage mechanism (9) comprising a support seat (91) symmetrically arranged on the mounting tube (1), a clamping plate (92) respectively inserted on the two support seats (91), the clamping plate (92) and the support seat (91) on the same side are slidably matched, a collar (93) is provided between the two clamping plates (92), and the clamping plates (92) on both sides are attached to the deflated inflatable bag (61) so as to be clamped and stored by the collar (93).

5. A plastic pipe inner wall grinding device according to claim 4, characterized in that: The storage mechanism (9) further comprises an insertion rod (94) respectively inserted into the support seats (91) on both sides, an elastic member (95) is further provided between the two insertion rods (94) and the support seats (91), and the insertion rods (94) are plug-fitted with the same-side clamping plate (92).

6. A plastic pipe inner wall grinding device according to claim 5, characterized in that: Arranged threaded holes are provided at both ends of the plate sleeve (4) and on the telescopic plate (41), suitable for inserting bolts to fix the position between the plate sleeve (4) and the telescopic plate (41).

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