Grinding machine inner wall spiral grinding and cleaning structure and pipe inside and outside grinding machine

Abstract

The invention discloses a spiral grinding and cleaning structure for the inner wall of a grinding machine and a pipe interior and exterior grinding machine. In the grinding process, particles in a pipe are cleaned through cleaning brushes, and grinding particles are driven to slide towards the outer side of the pipe through spiral arrangement of grinding brushes; and metal particles in a pipe are adsorbed through an electromagnet, so that the secondary cleaning difficulty is reduced. The device is characterized in that the device is composed of a polishing assembly and an adsorption assembly, the polishing assembly is composed of a polishing head, a dustproof hole, a cleaning brush and a polishing strip, the polishing strip is fixedly arranged on the side face of the polishing head, a containing groove is formed in the side face of the polishing head, and the cleaning brush is clamped on the containing groove; the adsorption assembly is composed of an adsorption shell, a positioning frame, anti-skid rubber, a damping spring, a containing groove, a fixed power source, a limiting block, a positioning ring, a wire, a coil, a connecting hole, a containing hole, a heat insulation layer, a damping shell, a locking ring, heat dissipation holes and a locking groove.

Description

Technical Field

[0001] The present invention discloses a spiral grinding and cleaning structure for the inner wall of a grinder and an inner and outer grinder for pipes, which relate to a structure installed on an inner and outer grinder for pipes and can clean the inside of the pipes while grinding. The structure belongs to the technical field of steel grinding, and particularly relates to an autonomous cleaning structure which can clean particles inside the pipes by a cleaning brush during the grinding process and absorb metal particles inside the pipes by an electromagnet to reduce the difficulty of secondary cleaning. Background Art

[0002] There may be a hardened layer on the surface of the pipe after mechanical processing. This hardened layer is brittle and has residual stress. It is easy to cause cracking and other problems during the early use of the pipe. It is also very easy to cause oxidation, rust or accumulation of impurities during the storage of the pipe. Therefore, they often need to be polished before use. The surface of the pipe after polishing is smooth, which is conducive to subsequent processing operations, such as painting, plating, etc. These coatings or plating can provide additional protection and extend the service life of the pipe. Therefore, polishing is an important step in pipe pretreatment, which is not only related to the appearance and performance of the pipe, but also directly affects its performance and life in subsequent applications. The existing pipe polishing device can generally only polish the inner wall or outer wall of the pipe separately. When the entire pipe needs to be polished, it is necessary to use a special internal polishing device to polish the inner wall and then use an external polishing device to polish the outer wall. In this process, workers are required to move the pipe many times, which not only has a high processing cost but also increases the workload and reduces work efficiency.

[0003] Announcement No. CN137863443B discloses a pipe grinder, comprising a workbench, motor frames are installed on both sides of the bottom of the inner cavity of the workbench, a motor is installed on the top of the motor frame, one side of the motor is connected to an output shaft, one side of the output shaft is connected to an operating table, one side of the operating table is connected to an electric telescopic rod, one side of the electric telescopic rod is connected to a grinding sheet, the bottom of the operating table is fixedly connected to a baffle, the bottom of the baffle is connected to a buffer spring, the bottom of the buffer spring is installed with a support plate, the bottom of the support plate is fixedly connected to a pneumatic rod, the bottom of the pneumatic rod is installed with a fixed block, the top of the inner cavity of the workbench is movably connected to a sliding block, the bottom of the sliding block is installed with a fixed seat, the inner cavity of the fixed seat is provided with a clamping ring, both sides of the clamping ring are connected to screws, one side of the screw is connected to a nut, the bottom of the clamping ring is fixedly connected to a clamping block, and both sides of the clamping block are movably connected to pins. The grinder can only grind both sides of the outer wall of the pipe. Grinding the outer wall requires workers to rotate the pipe multiple times, which has extremely low work efficiency and is easy to accidentally injure workers.

[0004] Announcement No. CN386633696U discloses a pipe inner wall grinding machine, including a base, a positioning mechanism fixedly arranged on the base, and a grinding mechanism arranged on the base, the positioning mechanism includes a plurality of positioning chucks arranged at one end of the base and a positioning seat arranged on the base, the positioning chuck is used to position one end of the pipe to be polished, the positioning seat is provided with a plurality of positioning grooves, the positioning grooves are used to position the other end of the pipe to be polished, and the grinding mechanism is used to grind the inner wall of the positioned pipe. The grinder can only grind the inner wall of the pipe, and after grinding, it needs to be manually reset and then grind for the second time, which increases extra workload.

[0005] In order to improve the above problems, the applicant filed another Chinese invention patent application entitled "A pipe internal and external grinding machine", which uses a transmission wheel to drive the pipe to move, and uses a grinding brush to grind the inner and outer walls of the pipe at the same time. However, the above pipe internal and external grinding device will produce a large amount of debris after grinding. During the grinding process, as the grinding head continues to move, some of the debris will squeeze and rub between the grinding head and the inner wall of the pipe, which can easily scratch the inner wall of the pipe. Summary of the invention

[0006] In order to improve the above situation, the present invention provides a spiral grinding and cleaning structure for the inner wall of a grinder and a grinder for the inside and outside of a pipe, which provides a grinding and cleaning structure that cleans the particles inside the pipe by a cleaning brush during the grinding process, drives the grinding particles to slide to the outside of the pipe by the spiral arrangement of the grinding brush, and absorbs the metal particles inside the pipe by an electromagnet to reduce the difficulty of secondary cleaning.

[0007] The spiral grinding and cleaning structure for the inner wall of a grinder and the inner and outer grinding machine of a pipe of the present invention are realized as follows: The spiral grinding and cleaning structure for the inner wall of a grinder of the present invention is composed of a grinding component and an adsorption component. The grinding assembly consists of a grinding head, a dustproof hole, a cleaning brush and a grinding strip. The grinding strip is fixed on the side of the grinding head. Preferably, the grinding strip is spirally wound around the side of the grinding head, and the cross section of the grinding strip is a semicircular structure. There is a placement slot on the side of the grinding head. Preferably, the placement groove is arranged in a "T" shape, the placement groove is spirally wound on the side of the grinding head, and the placement groove and the grinding strips are arranged alternately. The cleaning swipe card is placed on the placement slot. Preferably, the cleaning brush is in a long strip structure, the cleaning brush is spirally wound on the side of the grinding head, the cleaning brush is made of rubber material, and the cleaning brush is resistant to high temperature. The adsorption assembly is composed of an adsorption shell, a positioning frame, an anti-slip rubber, a shock-absorbing spring, a placement slot, a fixed power supply, a limit block, a positioning ring, a wire, a coil, a connection hole, a placement hole, a heat insulation layer, a shock-absorbing shell, a locking ring, a heat dissipation hole and a locking slot. There is a placement hole in the grinding head. Preferably, the placement hole is a cylindrical structure, and the placement hole is located at one end of the grinding head and does not penetrate the grinding head. A dustproof hole is opened at the other end of the grinding head, and the dustproof hole is connected to the placement hole. There are multiple dustproof holes, which are arranged in a circular pattern at equal distances at the other end of the grinding head. The heat insulation layer is fixed on the side of the placement hole. Preferably, the heat insulation layer is in a cylindrical structure. One end of the shock absorbing spring is fixed on the inner ring surface of the heat insulation layer, and the other end of the shock absorbing spring is fixed on the outer ring surface of the shock absorbing shell. The shock-absorbing shell is placed in the placement hole. Preferably, the shock absorbing shell is in a cylindrical structure. Preferably, the shock absorbing springs are provided in a plurality of groups, and the plurality of groups of shock absorbing springs are arranged equidistantly along the axial direction of the heat insulation layer, and each group of shock absorbing springs is provided with a plurality of shock absorbing springs, and the plurality of shock absorbing springs in each group are arranged equidistantly along the circumferential direction of the heat insulation layer. The locking ring is fixed on the inner ring surface of the thermal insulation layer. Preferably, the locking ring is in a circular ring structure, and the locking ring is placed between the dustproof hole and the shock absorbing shell. The anti-slip rubber is fixed on the inner ring surface of the shock-absorbing shell. Preferably, the anti-slip rubber has a cylindrical structure. The fixed power supply is placed in a shock-absorbing shell and is located in non-slip rubber. The positioning frame is fixed at one end of the shock-absorbing shell. Preferably, the cross section of the positioning frame is an "H"-shaped structure, and the positioning frame and the locking ring are slidably connected. There are multiple heat dissipation holes on the positioning frame. The outer ring surface of the positioning ring is provided with a locking groove, and a limiting block is fixedly arranged on the inner ring surface of the other end of the shock absorbing shell, and the locking groove corresponds to the limiting block. The positioning ring is slidably placed on the shock absorbing shell through the locking groove and the limiting block. Preferably, the positioning ring is in a circular ring structure, the locking groove is in an "L" shape, a plurality of the locking grooves are provided, and the plurality of the locking grooves are arranged at equal distances along the circumference of the positioning ring. The adsorption shell thread connection is placed on the inner ring surface of the insulation layer. Preferably, the adsorption shell is a hollow cylindrical structure. A connection hole is opened at one end of the adsorption shell. Preferably, the connecting hole is a cylindrical structure, and the connecting hole is aligned with the central axis of the adsorption shell. The two ends of the coil are clamped inside the adsorption shell. There are two wires, the two wires are connected to the positive and negative electrodes of the fixed power supply respectively, one end of the two wires is connected to the fixed power supply, and the other end of the two wires is connected to the coil; Furthermore, a superhard grinding strip is arranged on the grinding head, the superhard grinding strip is fixedly arranged on the side of the grinding head, the superhard grinding strip is spirally wound evenly on the surface of the grinding head, the spiral directions of the superhard grinding strip and the grinding strip are opposite, the roughness of the superhard grinding strip is greater than that of the grinding strip, and the winding density of the superhard grinding strip is greater than that of the grinding strip; Furthermore, an adjustment block is disposed on the adsorption shell, the adjustment block is fixedly disposed on the side of the adsorption shell, the adjustment block is arranged in an arc shape, and a plurality of the adjustment blocks are provided; The present invention also relates to a pipe internal and external grinding machine, which comprises a supporting component, a transmission component, an inner wall grinding component and an outer wall grinding component. The invention is characterized in that the transmission component is arranged on the support component, the inner wall grinding component is arranged on the support component, and the outer wall grinding component is arranged on the support component. The transmission component is used to position the pipe to be ground in the up-down and forward-backward directions while driving the pipe to move left and right, and then the grinding component is used to grind the inner wall and the outer wall of the pipe. The support assembly is composed of a grinding box, a placement plate, a connecting plate, a sliding groove, a first limiting groove and a second limiting groove. The placement plate is fixed at one end of the grinding box. Preferably, the polishing box is arranged in a U-shaped configuration. A first limiting groove is provided in the middle of the placement plate, and the cross section of the first limiting groove is a cross-shaped structure. The connecting plate is fixedly placed on the polishing box, the connecting plate and the placing plate are placed in parallel, a second limiting groove is opened in the middle of the connecting plate, and the cross section of the second limiting groove is a cross-shaped structure. Preferably, the central axes of the first limiting groove and the second limiting groove are the same. The sliding groove is placed inside the grinding box. Preferably, there are two sliding grooves, and the two sliding grooves are symmetrical about the polishing box. Preferably, the sliding groove is in an equilateral trapezoidal structure with the shorter side being located inside the polishing box. The transmission assembly is composed of a transmission motor, a main transmission shaft, a secondary transmission shaft and a transmission wheel. Two transmission motors are placed on the grinding box. Preferably, the conveying motor is in an intermittent working state, and the temporary load rate of the conveying motor is 15%. Preferably, the two conveying motors rotate in the same direction and at the same speed at the same time. There are two main transmission shafts, and the two main transmission shafts correspond to the two transmission motors one by one. A transmission wheel is disposed on the main transmission shaft, and the transmission wheel and the main transmission shaft are coaxially arranged. One end of the main transmission shaft is connected to one side of the polishing box through a bearing, and the other end of the main transmission shaft is connected to the motor shaft of the corresponding transmission motor and a supporting bearing is placed between the main transmission shaft and the polishing box. Both ends of the auxiliary transmission shaft are connected to the inner side of the grinding box through bearings. Preferably, the auxiliary transmission shafts are provided in plurality, and the plurality of auxiliary transmission shafts are arranged equidistantly along the length direction of the polishing box. The secondary transmission shaft is located above the primary transmission shaft. A transmission wheel is disposed on the secondary transmission shaft, and the transmission wheel and the secondary transmission shaft are coaxially arranged. Preferably, there is a channel for accommodating the passage of the pipe between the conveying wheel disposed on the main conveying shaft and the conveying wheel disposed on the auxiliary conveying shaft. Preferably, the inner diameter of the transmission wheel increases gradually from the middle to both ends in an arc shape, and an anti-skid pad is arranged on the surface of the transmission wheel. The anti-skid pad has two layers, the inner layer connected to the transmission wheel is a sponge pad, and the outer layer in contact with the pipe is a rubber pad; The inner wall grinding assembly is composed of an inner wall grinding motor, a connecting shaft, a first limiting ring, a second limiting ring, a grinding head and grinding particles. The inner wall grinding motor is placed on the placement plate. One end of the connecting shaft is placed on the motor shaft of the inner wall grinding motor, and the connecting shaft passes through the connecting plate and is coaxially placed with the second limiting groove. The connecting shaft is provided with a first limiting ring and a second limiting ring, the connecting shaft and the first limiting ring and the second limiting ring are coaxially arranged, the first limiting ring is rotatably placed in the first limiting groove, the second limiting ring is rotatably placed in the second limiting groove, the other end of the connecting shaft is provided with a threaded hole, and the thread direction is the same as the rotation direction of the motor when it is working. Preferably, the grinding head is threadedly connected to the connecting shaft. The cross-sectional diameter of the middle section of the grinding head is greater than the width of the two ends, and the cross-sectional diameters of the two ends of the grinding head gradually decrease. The grinding head is provided with reverse threads and rotates in the opposite direction to the inner wall grinding motor when working. The grinding particles are placed on the grinding head. Preferably, the grinding particles are in multiple groups, and the multiple groups of grinding particles are arranged equidistantly along the circumference of the grinding head. A group of the grinding particles has multiple grinding particles, and the multiple grinding particles in the same group are arranged equidistantly along the axial direction of the grinding head. The outer wall grinding assembly is composed of a sliding bar, a support plate, a cavity, a hole, a protective plate, an outer wall grinding motor, a main gear, a grinding bearing, a grinding gear, a fixing ring and outer grinding particles. Sliding bars are fixedly arranged on both sides of the support plate. The outer contour of the sliding bar is the same as that of the sliding groove, and the sliding bar is slidably connected and placed in the sliding groove. Preferably, the cavity is arranged in an 8-shape, and the cavity does not penetrate the support plate. The hole is set through the support plate and is aligned with the central axis of the upper circular ring of the cavity. The protective plate is fixed on the support plate and placed vertically to the support plate. The outer wall grinding motor is placed on the support plate and under the protective plate. One end of the main gear is connected to the support plate through a bearing, and the other end of the main gear is connected to the motor shaft of the outer wall grinding motor and a support bearing is placed between the main gear and the support plate. The grinding gear is rotatably placed in the cavity and meshes with the main gear. A circular groove is opened in the middle of the grinding gear, and the external grinding particles are placed in the circular groove. The grinding gear is provided with fixing rings on both sides. The inner ring of the grinding bearing is connected to the fixed ring, and the outer ring of the grinding bearing is fixedly connected to the hole wall of the hole. There are multiple groups of external grinding particles, and the multiple groups of external grinding particles are arranged at equal distances along the circumferential direction of the inner annular surface of the grinding gear. There are multiple external grinding particles in one group, and the multiple external grinding particles in the same group are arranged at equal distances along the axial direction of the grinding gear. Further, the grinding particles are replaced by grinding rings, and the grinding rings are wound around the annular side surface of the grinding head in a threaded shape; Furthermore, an oblique grinding head is fixed on one side of the grinding head, the bottom surface of one side of the oblique grinding head is the same as the side surface of the grinding head, and the cross-sectional diameter of the side surface of the oblique grinding head gradually decreases; the first grinding column is provided with multiple groups, and the multiple groups of first grinding columns are arranged equidistantly along the axial direction of the oblique grinding head, and one group has multiple first grinding columns, and the multiple first grinding columns in the same group are arranged at equal angles along the circumferential direction of the side surface of the oblique grinding head; the second grinding column is provided with multiple groups, and the multiple groups of second grinding columns are arranged equidistantly along the axial direction of the grinding head, and one group has multiple second grinding columns, and the multiple second grinding columns in the same group are arranged equidistantly along the circumferential direction of the side surface of the grinding head; fixed blocks are fixed on both sides of the first grinding column, the fixed blocks are triangular block structures, and the triangular plane is parallel to the oblique grinding head table surface; fixed blocks are fixed on both sides of the second grinding column, the fixed blocks are triangular block structures, and the triangular plane is parallel to the oblique grinding head table surface. Beneficial Effects

[0008] 1. The grinding strips and cleaning brushes are arranged alternately, which can perform cleaning operations simultaneously during the grinding process, avoiding the grinded particles from scratching the inner wall of the pipe again, and improving the smoothness of the pipe grinding.

[0009] Second, the spiral direction of the grinding strip is opposite to the grinding direction. When the grinding head rotates, this arrangement helps to slide the abrasive particles to the outside of the pipe, thereby helping to remove the material being ground away.

[0010] 3. The metal particles generated during the grinding process can be removed by electromagnets, which can reduce the difficulty of secondary cleaning and maintain the cleanliness of the inner wall.

[0011] 4. The cleaning brush adopts a detachable design. After the bristles are worn, a new cleaning brush can be quickly replaced, which reduces the cost of use while ensuring the cleaning effect.

[0012] 5. After grinding, turn off the power and the magnetic field disappears, allowing the metal particles to separate from the grinding head, making it easier to collect and clean, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural diagram of a pipe internal and external grinding machine of the present invention; Figure 2 It is a structural schematic diagram of a pipe internal and external grinding machine of the present invention; Figure 3 This is a schematic diagram of the structure of a pipe internal and external grinding machine of the present invention, which only shows the top view structure of the pipe internal and external grinding device; Figure 4 It is a structural schematic diagram of a pipe internal and external grinding machine of the present invention; Figure 5 It is a three-dimensional structural diagram of a pipe internal and external grinding machine for grinding gears of the present invention; Figure 6 This is a three-dimensional structural diagram of Example 2 of a pipe internal and external grinding machine of the present invention, in which only the structure of the grinding head is shown; Figure 7 This is a three-dimensional structural diagram of Example 3 of a pipe internal and external grinder of the present invention, in which only the structure of the grinding head is shown.

[0014] Figure 8 A three-dimensional structural diagram of a spiral grinding and cleaning structure for the inner wall of a grinding machine according to the present invention; Fig. 9 It is a structural schematic diagram of a spiral grinding and cleaning structure for the inner wall of a grinder according to the present invention; Fig.10 This is a three-dimensional structural diagram of a spiral grinding and cleaning structure for the inner wall of a grinder according to the present invention, which only shows the structure of the fixing ring; Fig.11It is a structural schematic diagram of a second embodiment of a spiral grinding and cleaning structure for the inner wall of a grinding machine according to the present invention; Fig.12 This is a structural schematic diagram of Example 3 of a spiral grinding and cleaning structure for the inner wall of a grinder according to the present invention. Attached photos

[0015] The components include: a grinding box (1), a placement plate (2), a connecting plate (3), a sliding groove (4), a sliding bar (5), a supporting plate (6), a transmission motor (7), an inner wall grinding motor (8), a first limiting groove (9), a second limiting groove (10), an outer wall grinding motor (11), a grinding head (12), grinding particles (13), a connecting shaft (14), a second limiting ring (15), a first limiting ring (16), a secondary transmission shaft (17), a main transmission shaft (18), a protective plate (19), a transmission wheel (20), a cavity (21), a hole (22), a main gear (23), a grinding bearing (24), a grinding gear (25), outer grinding particles (26), a fixing ring (27), Reverse thread (28), grinding ring (29), oblique grinding head (30), first grinding column (31), fixed block (32), second grinding column (33), dustproof hole (34), cleaning brush (35), grinding strip (36), adsorption shell (37), positioning frame (38), anti-slip rubber (39), shock absorbing spring (40), placement groove (41), fixed power supply (42), limit block (43), positioning ring (44), wire (45), coil (46), connection hole (47), placement hole (48), heat insulation layer (49), shock absorbing shell (50), locking ring (51), heat dissipation hole (52), locking groove (53), super hard grinding strip (54), adjustment block (55) DETAILED DESCRIPTION Example 1

[0016] The spiral grinding and cleaning structure of the inner wall of a grinding machine of the present invention is composed of a grinding component and an adsorption component. The grinding assembly is composed of a grinding head (12), a dustproof hole (34), a cleaning brush (35) and a grinding strip (36). The grinding strip (36) is fixedly placed on the side of the grinding head (12). Preferably, the grinding strip (36) is spirally wound around the side of the grinding head (12), and the cross section of the grinding strip (36) is a semicircular structure. The grinding head (12) has a placement groove (41) on the side thereof. Preferably, the placement groove (41) is arranged in a "T" shape, the placement groove (41) is spirally wound on the side of the grinding head (12), and the placement groove (41) and the grinding strips (36) are arranged alternately. The cleaning brush (35) is placed on the placement slot (41). Preferably, the cleaning brush (35) is in the form of an elongated strip, the cleaning brush (35) is spirally wound around the side of the grinding head (12), the cleaning brush (35) is made of rubber material, and the cleaning brush (35) is resistant to high temperatures. The adsorption assembly is composed of an adsorption shell (37), a positioning frame (38), an anti-slip rubber (39), a shock-absorbing spring (40), a placement slot (41), a fixed power supply (42), a limit block (43), a positioning ring (44), a wire (45), a coil (46), a connection hole (47), a placement hole (48), a heat insulation layer (49), a shock-absorbing shell (50), a locking ring (51), a heat dissipation hole (52) and a locking slot (53). A placement hole (48) is provided in the grinding head (12). Preferably, the placement hole (48) is in a cylindrical structure, and the placement hole (48) is disposed at one end of the grinding head (12) and does not penetrate the grinding head (12). A dustproof hole (34) is formed at the other end of the grinding head (12), and the dustproof hole (34) is connected to the placement hole (48). A plurality of dustproof holes (34) are provided, and the plurality of dustproof holes (34) are arranged in a ring at equal distances at the other end of the grinding head (12). The heat insulation layer (49) is fixedly placed on the side of the placement hole (48). Preferably, the heat insulation layer (49) is in the form of a hollow cylindrical structure. One end of the shock absorbing spring (40) is fixedly placed on the inner annular surface of the heat insulation layer (49), and the other end of the shock absorbing spring (40) is fixedly placed on the outer annular surface of the shock absorbing shell (50). The shock absorbing shell (50) is placed in the placement hole (48). Preferably, the shock absorbing shell (50) is a cylindrical structure. Preferably, the shock absorbing springs (40) are provided in a plurality of groups, the plurality of groups of shock absorbing springs (40) are arranged equidistantly along the axial direction of the heat insulation layer (49), each group of shock absorbing springs (40) is provided with a plurality of shock absorbing springs (40), and the plurality of shock absorbing springs (40) in each group are arranged equidistantly along the circumferential direction of the heat insulation layer (49). The locking ring (51) is fixedly placed on the inner annular surface of the thermal insulation layer (49). Preferably, the locking ring (51) is in the form of a circular ring, and the locking ring (51) is disposed between the dustproof hole (34) and the shock absorbing shell (50). The anti-slip rubber (39) is fixedly placed on the inner annular surface of the shock absorbing shell (50). Preferably, the anti-slip rubber (39) has a cylindrical structure. The fixed power source (42) is placed in the shock-absorbing shell (50) and is located in the anti-slip rubber (39). The positioning frame (38) is fixedly placed on one end of the shock absorbing shell (50). Preferably, the cross section of the positioning frame (38) is an “H”-shaped structure, and the positioning frame (38) and the locking ring (51) are slidably connected. The positioning frame (38) is provided with a plurality of heat dissipation holes (52). The outer ring surface of the positioning ring (44) is provided with a locking groove (53), and a limiting block (43) is fixedly disposed on the inner ring surface of the other end of the shock absorbing shell (50), wherein the locking groove (53) corresponds to the limiting block (43). The positioning ring (44) is slidably placed on the shock absorbing shell (50) via the locking groove (53) and the limiting block (43). Preferably, the positioning ring (44) is in a circular ring structure, the locking groove (53) is in an “L”-shaped structure, a plurality of the locking grooves (53) are provided, and the plurality of the locking grooves (53) are arranged at equal distances along the circumference of the positioning ring (44). The adsorption shell (37) is threadedly connected and placed on the inner annular surface of the thermal insulation layer (49). Preferably, the adsorption shell (37) is a hollow cylindrical structure. A connection hole (47) is formed at one end of the adsorption shell (37). Preferably, the connection hole (47) is a cylindrical structure, and the central axis of the connection hole (47) and the adsorption shell (37) is the same. The two ends of the coil (46) are clamped inside the adsorption shell (37). Two wires (45) are provided, and the two wires (45) are respectively connected to the positive and negative electrodes of the fixed power source (42), one end of the two wires (45) is connected to the fixed power source (42), and the other end of the two wires (45) is connected to the coil (46); When in use, the inner wall grinding motor (8) drives the grinding head (12) to rotate, and the grinding strip (36) grinds the inner wall of the pipe. At the same time, the cleaning brush (35) can clean the tiny particles adsorbed on the inner wall of the pipe. The cleaning work is completed while grinding, thereby avoiding secondary pollution and ensuring the smoothness of the grinding surface. The spiral direction of the cleaning brush is opposite to the rotation direction of the grinding head (12), so that more tiny particles can be cleaned and placed on the side close to the connecting shaft (14). When the pipe is polished, the tiny particles can be separated from the pipe. At the same time, when the electromagnet is working, it is connected to the power supply to generate a magnetic field, which can adsorb the residual metal particles inside. After the grinding is completed, the electromagnet is turned off to make the metal particles fall naturally, which is convenient for collection and treatment, reducing the difficulty of secondary cleaning and reducing the workload. Example 2

[0017] The difference between this embodiment and embodiment 1 is that: a superhard grinding strip (54) is arranged on the grinding head (12), the superhard grinding strip (54) is fixedly arranged on the side of the grinding head (12), the superhard grinding strip (54) is spirally wound evenly on the surface of the grinding head (12), the spiral directions of the superhard grinding strip (54) and the grinding strip (36) are opposite, the roughness of the superhard grinding strip (54) is greater than that of the grinding strip (36), and the winding density of the superhard grinding strip (54) is greater than When the grinding strip (36) is used, the super-hard grinding strip (54) performs preliminary grinding on the inner wall of the pipe. Since the super-hard grinding strip (54) has high durability and cutting ability, it can quickly remove burrs, bumps and other uneven parts on the inner wall of the pipe, thereby achieving rapid grinding. The grinding strip (36) is then used to perform secondary grinding on the pipe, which can reduce the wear rate of a single grinding strip (36) and extend the overall service life of the grinding head (12), thereby improving not only efficiency but also smoothness. Example 3

[0018] The difference between this embodiment and embodiment 1 is that an adjustment block (55) is disposed on the adsorption shell (37), the adjustment block (55) is fixedly disposed on the side of the adsorption shell (37), the adjustment block (55) is arranged in an arc shape, and a plurality of the adjustment blocks (55) are provided. When in use, the adsorption shell (37) needs to be spirally disassembled to replace the fixed power supply (42). During the grinding process, the outer wall of the adsorption shell (37) is easily contaminated with tiny particles, and these tiny particles are easy to cause slippage, making the disassembly work difficult. The adjustment block (55) can be used as a force transmission point, so that the adsorption shell (37) can be unscrewed more laboriously.

[0019] The grinding strip (36) is spirally wound around the side of the grinding head (12). The cross-section of the grinding strip (36) is designed to be semicircular, which can completely grind the inner wall of the pipe to reduce the possibility of omission. At the same time, the semicircular shape is more stable, avoiding the occurrence of damage and splashing of the grinding particles (13); The placement groove (41) is arranged in a "T" shape, and the placement groove (41) is spirally wound on the side of the grinding head (12). The placement groove (41) and the grinding strips (36) are alternately arranged, which can provide a more stable support structure for the cleaning brush (35) and prevent the cleaning brush (35) from loosening or falling off during operation. The cleaning brush (35) is in the form of a long strip, and is spirally wound around the side of the grinding head (12). The cleaning brush (35) is made of rubber material, and is resistant to high temperatures, and can clean internal tiny particles while grinding to avoid secondary contamination. The heat insulation layer (49) is fixedly placed on the side of the hole (22). The heat insulation layer (49) is in a cylindrical structure. During the grinding process, heat is easily generated, which may damage the battery coil (46) and the like. The heat insulation layer (49) can isolate internal and external heat, thereby reducing damage to internal structures such as the battery. The shock absorbing springs (40) are provided in a plurality of groups, and the plurality of groups of shock absorbing springs (40) are arranged equidistantly along the axial direction of the heat insulation layer (49); each group of shock absorbing springs (40) is provided with a plurality of shock absorbing springs, and the plurality of shock absorbing springs (40) in each group are arranged equidistantly along the circumference of the heat insulation layer (49), so that the battery can be shock-absorbing during the high-speed rotation of the grinding head (12), thereby increasing the service life of the battery; The other end of the grinding head (12) is provided with a dustproof hole (34), and the positioning frame (38) is provided with a plurality of heat dissipation holes (52), which can dissipate heat from the battery inside the grinding head (12) and prevent the entry of tiny particles from the outside, thereby increasing the battery life and preventing the battery from being damaged by particles from the outside; The outer ring surface of the positioning ring (44) is provided with a locking groove (53); a limiting block (43) is fixedly arranged on the inner ring surface of the other end of the shock absorbing shell (50); the locking groove (53) and the limiting block (43) correspond to each other; the positioning ring (44) is slidably placed on the shock absorbing shell (50) through the locking groove (53) and the limiting block (43); the positioning ring (44) is in a circular ring structure; the locking groove (53) is in an "L" shape; a plurality of locking grooves (53) are provided; the plurality of locking grooves (53) are arranged equidistantly along the axial direction of the positioning ring (44); the locking groove (53) and the limiting block (43) cooperate to fix the positioning ring (44) on the other end of the shock absorbing shell (50); the battery position can be limited, and the battery can be prevented from flying out during the operation of the grinding head (12); The purpose of being able to clean particles inside the pipe by using the cleaning brush (35) during the grinding process and reducing the difficulty of secondary cleaning by using the electromagnet to absorb metal particles inside the pipe is achieved.

[0020] It should be noted that the inner wall spiral grinding and cleaning structure is suitable for the following pipe inner and outer grinding machines: The present invention provides a pipe internal and external grinding machine, which is implemented as follows: The present invention provides a pipe internal and external grinding machine, which includes a supporting component, a transmission component, an inner wall grinding component and an outer wall grinding component. The invention is characterized in that the transmission component is arranged on the support component, the inner wall grinding component is arranged on the support component, and the outer wall grinding component is arranged on the support component. The transmission component is used to position the pipe to be ground in the up-down and forward-backward directions while driving the pipe to move left and right, and then the grinding component is used to grind the inner wall and the outer wall of the pipe. The support assembly is composed of a polishing box (1), a placement plate (2), a connecting plate (3), a sliding groove (4), a first limiting groove (9) and a second limiting groove (10). The placement plate (2) is fixedly placed on one end of the grinding box (1). Preferably, the polishing box (1) is arranged in a U-shaped configuration. A first limiting groove (9) is provided in the middle of the placement plate (2), and the cross section of the first limiting groove (9) is a cross-shaped structure. The connecting plate (3) is fixedly placed on the polishing box (1), the connecting plate (3) and the placement plate (2) are placed in parallel, a second limiting groove (10) is opened in the middle of the connecting plate (3), and the cross section of the second limiting groove (10) is a cross-shaped structure. Preferably, the central axis of the first limiting groove (9) and the central axis of the second limiting groove (10) are the same. The sliding groove (4) is placed inside the grinding box (1). Preferably, there are two sliding grooves (4), and the two sliding grooves (4) are symmetrical with respect to the polishing box (1). Preferably, the sliding groove (4) is in an equilateral trapezoidal structure and the shorter side is located inside the polishing box (1). The transmission assembly is composed of a transmission motor (7), a main transmission shaft (18), a secondary transmission shaft (17) and a transmission wheel (20). Two conveying motors (7) are placed on the grinding box (1). Preferably, the conveying motor (7) is in an intermittent working state, and the temporary load rate of the conveying motor (7) is 15%. Preferably, the two conveying motors (7) rotate in the same direction and at the same speed at the same time. The main transmission shafts (18) are provided with two, and the two main transmission shafts (18) correspond to the two transmission motors (7) in a one-to-one manner. A transmission wheel (20) is disposed on the main transmission shaft (18), and the transmission wheel (20) and the main transmission shaft (18) are coaxially arranged. One end of the main transmission shaft (18) is connected to one side of the grinding box (1) via a bearing, and the other end of the main transmission shaft (18) is connected to the motor shaft of the corresponding transmission motor (7) and a support bearing is disposed between the main transmission shaft (18) and the grinding box (1). Both ends of the auxiliary transmission shaft (17) are connected to the inner side of the grinding box (1) through bearings. Preferably, a plurality of auxiliary transmission shafts (17) are provided, and the plurality of auxiliary transmission shafts (17) are arranged equidistantly along the length direction of the polishing box (1). The secondary transmission shaft (17) is located above the primary transmission shaft (18). A transmission wheel (20) is disposed on the auxiliary transmission shaft (17), and the transmission wheel (20) and the auxiliary transmission shaft (17) are coaxially arranged. Preferably, there is a passage for accommodating the passage of the pipe between the conveying wheel (20) disposed on the main conveying shaft (18) and the conveying wheel (20) disposed on the auxiliary conveying shaft (17). Preferably, the inner diameter of the transmission wheel (20) increases gradually in an arc shape from the middle to both ends, and an anti-skid pad is arranged on the surface of the transmission wheel (20), wherein the anti-skid pad has two layers, the inner layer connected to the transmission wheel (20) is a sponge pad, and the outer layer in contact with the pipe is a rubber pad; The inner wall grinding assembly is composed of an inner wall grinding motor (8), a connecting shaft (14), a first limiting ring (16), a second limiting ring (15), a grinding head (12) and grinding particles (13). The inner wall grinding motor (8) is placed on the placement plate (2). One end of the connecting shaft (14) is placed on the motor shaft of the inner wall grinding motor (8), and the connecting shaft (14) passes through the connecting plate (3) and is coaxially placed with the second limiting groove (10). The connecting shaft (14) is provided with a first limiting ring (16) and a second limiting ring (15); the connecting shaft (14) and the first limiting ring (16) and the second limiting ring (15) are coaxially arranged; the first limiting ring (16) is rotatably placed in the first limiting groove (9); the second limiting ring (15) is rotatably placed in the second limiting groove (10); the other end of the connecting shaft (14) is provided with a threaded hole, and the direction of the thread is the same as the direction of rotation of the motor when it is working. Preferably, the grinding head (12) is threadedly connected to the connecting shaft (14). The cross-sectional diameter of the middle section of the grinding head (12) is greater than the width of the two ends, and the cross-sectional diameters of the two ends of the grinding head (12) gradually decrease. The grinding head (12) is provided with a reverse thread (28) and rotates in the opposite direction to the inner wall grinding motor (8) when in operation. The grinding particles (13) are placed on the grinding head (12). Preferably, the grinding particles (13) include multiple groups, the multiple groups of grinding particles (13) are arranged equidistantly along the circumference of the grinding head (12), and a group of the grinding particles (13) includes multiple grinding particles (13), and the multiple grinding particles (13) in the same group are arranged equidistantly along the axial direction of the grinding head (12). The outer wall grinding assembly is composed of a sliding bar (5), a support plate (6), a cavity (21), a hole (22), a protective plate (19), an outer wall grinding motor (11), a main gear (23), a grinding bearing (24), a grinding gear (25), a fixing ring (27) and outer grinding particles (26). Sliding bars (5) are fixedly mounted on both sides of the support plate (6). The outer contour of the sliding bar (5) is the same as that of the sliding groove (4), and the sliding bar (5) is slidably connected and placed in the sliding groove (4). Preferably, the cavity (21) is arranged in an 8-shape, and the cavity (21) does not penetrate the support plate (6). The hole (22) is arranged through the support plate (6) and is aligned with the central axis of the upper circular ring of the cavity (21). The protective plate (19) is fixedly placed on the support plate (6) and is placed vertically to the support plate (6). The outer wall grinding motor (11) is placed on the support plate (6) and below the protective plate (19). One end of the main gear (23) is connected to the support plate (6) via a bearing, and the other end of the main gear (23) is connected to the motor shaft of the outer wall grinding motor (11) and a support bearing is disposed between the main gear (23) and the support plate (6). The grinding gear (25) is rotatably disposed in the cavity (21) and meshes with the main gear (23). The grinding gear (25) has a circular groove in the middle, and the external grinding particles (26) are placed in the circular groove. The grinding gear (25) is provided with fixing rings (27) on both sides thereof. The inner ring of the grinding bearing (24) is connected to the fixing ring (27), and the outer ring of the grinding bearing (24) is fixedly connected to the hole wall of the hole (22). The external grinding particles (26) include multiple groups, and the multiple groups of external grinding particles (26) are arranged at equal distances along the circumferential direction of the inner annular surface of the grinding gear (25); a group of external grinding particles (26) includes multiple particles, and the multiple external grinding particles (26) in the same group are arranged at equal distances along the axial direction of the grinding gear (25); When in use, the pipe is placed in the middle of the conveying wheel (20), and the conveying motor (7) drives the conveying shaft to rotate and squeeze the pipe through the conveying wheel (20) to convey the pipe. The conveying motor (7) is in an intermittent working state. When one side of the pipe contacts the grinding head (12), it stops working. The inner wall grinding motor (8) drives the grinding head (12) to rotate, thereby grinding the inner wall of the pipe. At the same time, the outer wall grinding motor (11) drives the slave gear to rotate, so that the outer grinding particles (26) grind the outer surface of the pipe. The two work simultaneously and in opposite directions, thereby preventing the pipe from rotating during the working process. After grinding is completed, the conveying motor (7) continues to work, driving the pipe to move a certain distance, and the grinding motor continues to work, and then the conveying and grinding work are repeated alternately until the entire pipe is polished once. The conveying motor (7) works in the reverse direction, so that the pipe can be polished a second time until the pipe is completely away from the support plate (6); Example 2

[0021] The difference between this embodiment and embodiment 1 is that: the grinding particles (13) are replaced by grinding rings (29), and the grinding rings (29) are wound around the annular side surface of the grinding head (12) in a threaded shape; When in use, the grinding ring (29) can grind the inner wall of the pipe within a certain length range, and the cross-section of the grinding ring (29) is a semicircular structure, which is more stable and can avoid the grinding particles (13) from collapsing during the grinding process, thereby helping to improve the uniformity and smoothness of the inner wall of the pipe; Example 3

[0022] The difference between this embodiment and embodiment 1 is that an oblique grinding head (30) is fixedly arranged on one side of the grinding head (12), the bottom surface of one side of the oblique grinding head (30) is the same as the side surface of the grinding head (12), the cross-sectional diameter of the side surface of the oblique grinding head (30) gradually decreases, the first grinding column (31) is provided in a plurality of groups, the plurality of groups of first grinding columns (31) are arranged equidistantly along the axial direction of the oblique grinding head (30), a group of the first grinding columns (31) has a plurality of first grinding columns (31), and the plurality of first grinding columns (31) in the same group are arranged at equal angles along the circumferential direction of the side surface of the oblique grinding head (30), the second grinding column (33) is provided in a plurality of groups, the plurality of groups of second grinding columns (33) are arranged equidistantly along the axial direction of the grinding head (12), a group of the second grinding columns (33) has a plurality of second grinding columns (33), and the plurality of second grinding columns (33) in the same group are arranged equidistantly along the circumferential direction of the grinding head ( 12) The sides are arranged at equal distances in the circumferential direction. Fixed blocks (32) are fixedly arranged on both sides of the first grinding column (31). The fixed blocks (32) are in a triangular block structure, and the triangular plane and the oblique grinding head (30) table are arranged in parallel. Fixed blocks (32) are fixedly arranged on both sides of the second grinding column (33). The fixed blocks (32) are in a triangular block structure, and the triangular plane and the oblique grinding head (30) table are arranged in parallel. When in use, when the inner wall of the pipe has a large area to be ground, the annular grinding head (12) cannot enter the cross section. The smaller cross-section of the front side of the oblique grinding head (30) can enter the interior of the pipe, thereby gradually expanding the internal passable range. The fixed blocks (32) are in a stable triangular structure, which can fix the grinding particles (13) and reduce the risk of breakage, and can effectively grind large foreign objects inside. The sliding groove (4) cooperates with the sliding bar (5) to limit the support plate (6), which can facilitate the removal of the support plate (6) and the replacement of the grinding head (12) and the grinding gear (25); The two conveying motors (7) have the same rotation speed and direction during the same working time, thereby avoiding squeezing or pulling the pipe and causing unnecessary damage to the pipe; The conveying motor (7) is in an intermittent working state and does not convey during the grinding process, which can effectively avoid the risk of the pipe slipping or bending; The grinding gear (25) and the grinding head (12) rotate at the same speed and in opposite directions, thereby improving the grinding efficiency and preventing the pipe from rotating on the conveying wheel (20); The inner diameter of the transmission wheel (20) increases gradually from the middle to the two ends in an arc shape, and an anti-skid pad is arranged on the surface of the transmission wheel (20). The anti-skid pad has two layers, the inner layer connected to the transmission wheel (20) is a sponge pad, and the outer layer in contact with the pipe is a rubber pad. The inner diameter of the transmission wheel (20) increases gradually from the middle to the two ends in an arc shape, which can better fit the curvature of the pipe and improve the stability during transmission. The sponge pad of the inner layer can buffer the impact of the pipe, and the rubber pad of the outer layer has good friction and can prevent the pipe from slipping during transmission. The cross-sectional diameter of the middle section of the grinding head (12) is larger than the width of the two ends. The cross-sectional diameters of the two ends of the grinding head (12) are designed to gradually decrease. The cross-sectional diameters of the two ends of the grinding head (12) gradually decrease to form a tapered structure, which can be easily inserted into the interior of the pipe and aligned with the center of the pipe. The cross-sectional diameter of the middle section of the grinding head (12) is larger than the width of the two ends, which can be stuck in the interior of the pipe for positioning, ensuring that the grinding head (12) remains stable inside the pipe, thereby improving the grinding effect; The purpose of being able to drive the pipe to move by the conveying wheel (20) and simultaneously grinding the inner and outer walls of the pipe by the grinding brush is achieved.

[0023] It should be noted that, unless otherwise clearly specified and limited, the terms "placed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection method such as a folding connection, a rivet connection, a pin connection, an adhesive connection and a welding connection, or a detachable connection method such as a threaded connection, a snap connection and a hinge connection, or an integral connection, or an electrical connection, or a direct connection, or an indirect connection through an intermediate medium, or the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] It should be further pointed out that, when describing the above specific embodiment, for the sake of simplicity and clarity, only the differences between the above specific embodiment and other embodiments are described, but those skilled in the art should know that the above specific embodiment itself is also an independent technical solution.

Claims

1. A spiral grinding and cleaning structure for the inner wall of a grinding machine, characterized by: The invention is composed of a grinding component and an adsorption component, wherein the grinding component is composed of a grinding head, a dustproof hole, a cleaning brush and a grinding strip, the grinding strip is fixedly placed on the side of the grinding head, a placement slot is opened on the side of the grinding head, and the cleaning brush card is placed on the placement slot, the adsorption component is composed of an adsorption shell, a positioning frame, an anti-slip rubber, a shock-absorbing spring, a placement slot, a fixed power supply, a limit block, a positioning ring, a wire, a coil, a connecting hole, a placement hole, a heat insulation layer, a shock-absorbing shell, a locking ring, a heat dissipation hole and a locking slot, a placement hole is provided in the grinding head, a dustproof hole is opened at the other end of the grinding head, the dustproof hole is connected to the placement hole, a plurality of dustproof holes are provided, the heat insulation layer is fixedly placed on the side of the placement hole, one end of the shock-absorbing spring is fixedly placed on the inner ring surface of the heat insulation layer, and the other end of the shock-absorbing spring is fixedly placed on the outer ring surface of the shock-absorbing shell, and the shock-absorbing shell is placed on the placement hole. The locking ring is fixed on the inner ring surface of the insulation layer, the anti-skid rubber is fixed on the inner ring surface of the shock-absorbing shell, the fixed power supply is placed in the shock-absorbing shell and in the anti-skid rubber, the positioning frame is fixed on one end of the shock-absorbing shell, and a plurality of heat dissipation holes are opened on the positioning frame, the outer ring surface of the positioning ring is opened with a locking groove, and a limit block is fixed on the inner ring surface of the other end of the shock-absorbing shell, the locking groove and the limit block correspond to each other, and the positioning ring can be slidably placed on the shock-absorbing shell through the locking groove and the limit block, the adsorption shell is threadedly connected and placed on the inner ring surface of the insulation layer, a connecting hole is opened at one end of the adsorption shell, and both ends of the coil are clamped on the inner side of the adsorption shell, and two wires are provided, and the two wires are respectively connected to the positive and negative poles of the fixed power supply, one end of the two wires is connected to the fixed power supply, and the other end of the two wires is connected to the coil.

2. A spiral grinding and cleaning structure for inner wall of a grinding machine according to claim 1, characterized in that A superhard grinding strip is arranged on the grinding head, and the superhard grinding strip is fixed on the side of the grinding head. The superhard grinding strip is spirally wound evenly on the surface of the grinding head. The spiral directions of the superhard grinding strip and the grinding strip are opposite. The roughness of the superhard grinding strip is greater than that of the grinding strip, and the winding density of the superhard grinding strip is greater than that of the grinding strip.

3. The spiral grinding and cleaning structure for the inner wall of a grinding machine according to claim 1, characterized in that An adjustment block is arranged on the adsorption shell, and the adjustment block is fixedly arranged on the side surface of the adsorption shell. The adjustment block is arranged in an arc shape, and a plurality of the adjustment blocks are provided.

4. The spiral grinding and cleaning structure for the inner wall of a grinding machine according to claim 1, characterized in that The grinding strip is spirally wound on the side of the grinding head, the cross section of the grinding strip is a semicircular structure, the placement groove is set in a "T" shape, the placement groove is spirally wound on the side of the grinding head, and the placement groove and the grinding strip are arranged alternately.

5. The spiral grinding and cleaning structure for the inner wall of a grinding machine according to claim 1, characterized in that The cleaning brush is in a long strip structure, and is spirally wound on the side of the grinding head. The cleaning brush is made of rubber material and has high temperature resistance.

6. The spiral grinding and cleaning structure for the inner wall of a grinding machine according to claim 1, characterized in that The placement hole is in a cylindrical structure, the placement hole is located at one end of the grinding head and does not penetrate the grinding head, a plurality of dustproof holes are arranged in a ring at equal distances at the other end of the grinding head, and the heat insulation layer is in a cylindrical structure.

7. The spiral grinding and cleaning structure for the inner wall of a grinding machine according to claim 1, characterized in that The shock absorbing shell is in a cylindrical structure. The shock absorbing springs are provided in multiple groups. The multiple groups of shock absorbing springs are arranged equidistantly along the axial direction of the heat insulation layer. Each group of shock absorbing springs is provided with multiple shock absorbing springs. The multiple shock absorbing springs in each group are arranged equidistantly along the circumferential direction of the heat insulation layer.

8. The spiral grinding and cleaning structure for the inner wall of a grinding machine according to claim 1, characterized in that The locking ring is in a circular ring structure, and is placed between the dustproof hole and the shock-absorbing shell. The anti-slip rubber is in a cylindrical structure, and the cross section of the positioning frame is in an "H"-shaped structure. The positioning frame and the locking ring are in a sliding connection.

9. The spiral grinding and cleaning structure for the inner wall of a grinding machine according to claim 1, characterized in that The positioning ring is in a circular ring structure, the locking groove is in an "L" shape, there are multiple locking grooves, and the multiple locking grooves are arranged at equal distances along the circumference of the positioning ring. The adsorption shell is in a hollow cylindrical structure, the connecting hole is in a cylindrical structure, and the connecting hole is the same as the central axis of the adsorption shell.

10. The spiral grinding and cleaning structure for the inner wall of a grinding machine according to claim 1, characterized in that The pipe internal and external grinding machine comprises a supporting assembly, a conveying assembly, an inner wall grinding assembly and an outer wall grinding assembly, wherein the conveying assembly is arranged on the supporting assembly, the inner wall grinding assembly is arranged on the supporting assembly, and the outer wall grinding assembly is arranged on the supporting assembly, and the conveying assembly is used to position the pipe to be ground in the up-down and forward-backward directions while driving the pipe to move left and right, and then the inner wall and the outer wall of the pipe are ground by the grinding assembly, and the supporting assembly is composed of a grinding box, a placing plate, a connecting plate, a sliding groove, a first limiting groove and a second limiting groove, and the placing plate is fixedly placed at one end of the grinding box, and the grinding box is in the shape of a The placing plate is provided with a first limiting groove in the middle, and the cross section of the first limiting groove is a cross-shaped structure. The connecting plate is fixedly placed on the polishing box, and the connecting plate and the placing plate are placed in parallel. The connecting plate is provided with a second limiting groove in the middle, and the cross section of the second limiting groove is a cross-shaped structure. The central axes of the first limiting groove and the second limiting groove are the same. The sliding groove is placed inside the polishing box. There are two sliding grooves, and the two sliding grooves are symmetrical about the polishing box. The sliding groove is an equilateral trapezoidal structure and the shorter side is placed inside the polishing box. The transmission assembly consists of a transmission motor, a main transmission shaft, a secondary transmission shaft and The transmission motor is composed of a transmission wheel, two transmission motors are placed on the polishing box, the transmission motor is in an intermittent working state, the temporary load rate of the transmission motor is 15%, the two transmission motors rotate in the same direction and speed at the same time, the main transmission shaft is provided with two, the two main transmission shafts correspond to the two transmission motors one by one, a transmission wheel is arranged on the main transmission shaft, the transmission wheel and the main transmission shaft are coaxially arranged, one end of the main transmission shaft is connected to one side of the polishing box through a bearing, the other end of the main transmission shaft is connected to the motor shaft of the corresponding transmission motor and a support bearing is arranged between the main transmission shaft and the polishing box, and both ends of the auxiliary transmission shaft They are all connected to the inner side of the grinding box through bearings, and there are multiple auxiliary transmission shafts, which are equidistantly arranged along the length direction of the grinding box. The auxiliary transmission shaft is located above the main transmission shaft, and a transmission wheel is arranged on the auxiliary transmission shaft. The transmission wheel and the auxiliary transmission shaft are coaxially arranged, and there is a channel for accommodating the passage of pipes between the transmission wheel arranged on the main transmission shaft and the transmission wheel arranged on the auxiliary transmission shaft. The inner diameter of the transmission wheel gradually increases in an arc shape from the middle to the two ends, and an anti-skid pad is arranged on the surface of the transmission wheel. The anti-skid pad has two layers, the inner layer connected to the transmission wheel is a sponge pad, and the outer layer in contact with the pipe is a rubber pad;The inner wall grinding assembly consists of an inner wall grinding motor, a connecting shaft, a first limiting ring, a second limiting ring, a grinding head and grinding particles. The inner wall grinding motor is placed on a placement plate, one end of the connecting shaft is placed on the motor shaft of the inner wall grinding motor, the connecting shaft passes through the connecting plate and is coaxially placed with the second limiting groove, a first limiting ring and a second limiting ring are provided on the connecting shaft, the connecting shaft and the first limiting ring and the second limiting ring are coaxially arranged, the first limiting ring is rotatably placed in the first limiting groove, the second limiting ring is rotatably placed in the second limiting groove, the other end of the connecting shaft is provided with a threaded hole and a screw thread is provided. The thread direction is the same as the rotation direction of the motor when working, the grinding head is threadedly connected and placed on the connecting shaft, the cross-sectional diameter of the middle section of the grinding head is greater than the width of the two ends, and the cross-sectional diameters of the two ends of the grinding head gradually decrease. The grinding head is provided with a reverse thread and the rotation direction is opposite to that of the inner wall grinding motor when working. The grinding particles are placed on the grinding head, and the grinding particles have multiple groups, and the multiple groups of grinding particles are arranged equidistantly along the circumference of the grinding head. A group of the grinding particles has multiple grinding particles, and the multiple grinding particles in the same group are arranged equidistantly along the axial direction of the grinding head. The outer wall grinding component consists of a sliding bar, a support plate, a cavity, a hole, a protective The support plate is composed of a plate, an outer wall grinding motor, a main gear, a grinding bearing, a grinding gear, a fixed ring and external grinding particles. Sliding bars are fixedly arranged on both sides of the support plate. The outer contour of the sliding bar is the same as the sliding groove. The sliding bar is slidably connected and placed in the sliding groove. The cavity is arranged in an 8-shape. The cavity does not penetrate the support plate. The hole penetrates the support plate and is the same as the central axis of the circular ring on the upper part of the cavity. The protective plate is fixed on the support plate and placed vertically with the support plate. The outer wall grinding motor is placed on the support plate and placed below the protective plate. One end of the main gear is connected to the support plate through a bearing. The other end of the main gear is connected to the outer wall The motor shaft of the grinding motor is connected and a support bearing is arranged between the motor shaft and the support plate. The grinding gear is rotatably arranged in the cavity and meshes with the main gear. A circular through groove is opened in the middle of the grinding gear, and the external grinding particles are arranged in the circular through groove. Fixed rings are arranged on both sides of the grinding gear respectively. The inner ring of the grinding bearing is connected to the fixed ring. The outer ring of the grinding bearing is fixedly connected to the hole wall of the hole. There are multiple groups of external grinding particles, and the multiple groups of external grinding particles are arranged at equal distances along the circumference of the inner ring surface of the grinding gear. There are multiple external grinding particles in one group, and the multiple external grinding particles in the same group are arranged at equal distances along the axial direction of the grinding gear. ;

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