A grinding device for prestressed concrete pipe pile mold

Abstract

The present invention belongs to the technical field of pipe pile mold processing, and specifically relates to a grinding device for a prestressed concrete pipe pile mold, which includes a mold body, a traction component, a grinding component and a variable speed motor. The grinding component includes an annular plate, a plurality of retractable friction heads and a pull rope. The annular plate is equipped with a plurality of friction heads, and the plurality of friction heads all press against the inner wall of the mold body. The pull rope runs through the annular plate and clamps the friction head through a pressure plate. The present invention makes the speed of the annular plate greater than the speed of the take-up roller at the moment when the speed of the variable speed motor is reduced, the pull rope is relaxed, the pressure plate is separated from the clamping of the friction head, and the spring at the bottom of the friction head rebounds, so that the friction head presses against the inner wall of the mold body, so that the severely worn friction head contacts the inner wall of the mold body again. Then, the speed of the variable speed motor is increased, so that the pressure plate clamps the friction head again, ensuring that the friction head can grind every part of the inner wall of the mold body, thereby improving the smoothness of the inner wall of the mold body.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe pile mould processing, and in particular relates to a grinding device for a prestressed concrete pipe pile mould. Background Art

[0002] In order to ensure the quality and aesthetics of the pipe piles, extend the life of the mold, and facilitate the demoulding and subsequent processing of the pipe piles, it is necessary to polish the inner wall of the mold regularly.

[0003] The traditional grinding method is that workers use handheld grinders to grind. The defects of this grinding method are: workers' hands are easily fatigued, the workers' bodies are bent, and the bodies are easily fatigued; there is a lot of dust during grinding, people are too close to the grinder, and the working environment is poor. Physical fatigue and poor working environment seriously affect work efficiency. In order to reduce the labor intensity of manual labor during the work process. The prior art has a grinding device for prestressed concrete pipe pile molds with a publication number of CN220516379U, which mainly reels the steel strand by rotating the reel shaft, so that the grinding mechanism moves in the axial position of the pipe pile mold body, and at the same time, the inner wall of the pipe pile mold body is polished by the grinding sheet. Since the pipe pile mould is composed of an upper mould and a lower mould fixed together, the inner wall of the pipe pile mould is actually an irregular circle. The conventional fixed-shape grinding disc in the above scheme cannot grind the entire inner wall of the pipe pile mould, which easily leads to the failure to grind a local position, resulting in uneven grinding of the inner wall of the pipe pile mould, thereby affecting the smoothness of the inner wall of the mould and making it inconvenient to demould the pipe pile. Summary of the invention

[0004] The purpose of the present invention is to provide a grinding device for a prestressed concrete pipe pile mold in view of the deficiencies in the prior art, so as to solve the technical problems in the prior art.

[0005] The purpose of the present invention can be achieved by the following technical scheme: A grinding device for a prestressed concrete pipe pile mold, comprising a mold body, a traction assembly and a grinding assembly, wherein a clamping plate is installed at one end of the mold body, and the traction assembly is fixedly installed on the clamping plate, and a fixing assembly is provided at the other end of the mold body, and the fixing assembly comprises a fixing plate and a retractable pulley, and a variable speed motor is fixedly installed on the fixing plate, and the pulley presses against the inner wall of the mold body;

[0006] The grinding assembly includes a sliding sleeve, an annular plate, a plurality of retractable friction heads and a pull rope. The output shaft of the variable speed motor passes through the sliding sleeve and is slidably connected to the sliding sleeve. A take-up roller is fixedly installed on the output shaft of the variable speed motor. A cylinder is installed on the sliding sleeve. The output end of the cylinder is connected to the annular plate. A plurality of friction heads are installed on the annular plate. The plurality of friction heads are pressed against the inner wall of the mold body. One end of the pull rope is fixedly installed on the annular plate. The pull rope passes through the annular plate and clamps the friction head through the pressure plate. The other end of the pull rope is fixedly connected to the take-up roller. The traction assembly is connected to the grinding assembly.

[0007] As a further optimization or improvement of the present solution, the fixing assembly also includes a mounting plate and a hydraulic rod, one end of the mounting plate is connected to the fixing plate, and the other end of the mounting plate is connected to the mounting ring, the output shaft of the variable speed motor passes through the mounting ring and slides with the mounting ring, the hydraulic rod is installed on the side wall of the mounting plate, and the output end of the hydraulic rod is connected to the pulley.

[0008] As a further optimization or improvement of this solution, an air pipe is coaxially installed on the output shaft of the variable speed motor, and a dust removal assembly is installed on the clamping plate. The dust removal assembly includes a dust collecting screen and a rubber scraper. The rubber scraper is installed on the fixed plate, and the dust collecting screen is installed on the clamping plate.

[0009] As a further optimization or improvement of the present solution, an air exchange hood is installed on the fixed plate, and the air exchange hood is connected to the variable speed motor.

[0010] As a further optimization or improvement of this solution, the traction assembly includes a traction rope, a traction plate is installed on the clamping plate, a traction roller is provided on the traction plate, the traction roller is coaxially connected to the motor, one end of the traction rope is connected to the traction roller, and the other end of the traction rope is connected to the grinding assembly.

[0011] As a further optimization or improvement of this solution, the friction head is connected to the annular plate through a spring, a dust suction assembly is installed between the pressure plate and the friction head, a pressure head is installed at the end of the dust suction assembly away from the pressure plate, and the pressure head clamps the side wall of the friction head through a rubber pad.

[0012] As a further optimization or improvement of this solution, the dust collection assembly includes a hose, a dust collection head installed on the top of the hose, and a dust collection bag installed at the bottom of the hose. The hose is connected to the dust collection head through a one-way plate one, and the hose is connected to the dust collection bag through a one-way plate two.

[0013] Beneficial effects of the present invention:

[0014] (1) The present invention uses the moment when the speed of the variable speed motor is reduced. At this time, the annular plate continues to rotate due to inertia. The speed of the annular plate is greater than the speed of the take-up roller. The speed difference between the annular plate and the take-up roller causes the pull rope to relax, and the pressure plate is released from the clamping of the friction head. The spring at the bottom of the friction head rebounds, causing the friction head to press against the inner wall of the mold body, so that the severely worn friction head contacts the inner wall of the mold body again. Then the speed of the variable speed motor is increased, so that the variable speed motor drives the pull rope to tighten through the take-up roller. At this time, the pressure plate clamps the friction head again, so that the friction head can continue to grind the inner wall of the mold body, ensuring that the friction head can always grind every part of the inner wall of the mold body, thereby improving the smoothness of the inner wall of the mold body.

[0015] (2) During the grinding process of the present invention, the traction assembly pulls the grinding assembly and the rubber scraper toward the dust collecting screen. At this time, the variable speed motor can drive the air pipe to rotate, so that the air pipe blows the dust on the top and bottom of the inner wall of the mold body toward the dust collecting screen and the dust collecting screen blocks it, thereby preventing debris and dust from being output from the mold body and causing harm to the workers. During the process of the traction assembly pulling the grinding assembly and the rubber scraper toward the dust collecting screen, the extension of the rubber scraper can scrape off the dust and debris remaining on the inner wall of the mold body, thereby improving the cleanliness of the inner wall of the mold body.

[0016] (3) When the variable speed motor tightens the pull rope through the take-up roller, the pull rope presses the hose through the pressure plate, so that the gas in the hose is squeezed out from the one-way plate 2, and then the pressure plate drives the hose and the pressure head to move, so that the pressure head clamps the friction head. When the speed of the variable speed motor decreases, the pull rope is in a relaxed state, and the hose recovers. At this time, the dust suction head sucks the dust and debris on the side wall of the friction head into the hose through the one-way plate 1; when the variable speed motor tightens the pull rope again through the take-up roller, the pressure plate squeezes the hose. At this time, the dust and debris inside the hose will enter the dust collection bag through the one-way plate 2 for collection, so as to collect the dust and debris on the side wall of the friction head and prevent the dust and debris on the side wall of the friction head from entering between the friction head and the inner wall of the mold body, causing scratches on the inner wall of the mold body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the connection structure between the grinding component and the traction component.

[0020] Figure 3 It is a schematic diagram of the traction component structure.

[0021] Figure 4 Schematic diagram of the polishing component structure.

[0022] Figure 5This is a schematic diagram of the connection structure between the grinding component and the fixed component.

[0023] Figure 6 This is an exploded view of the variable speed motor, fixed assembly and grinding assembly structure.

[0024] Figure 7 Schematic diagram of the internal structure of the annular plate.

[0025] Figure 8 Schematic diagram of the connection structure between the annular plate and the dust collection component.

[0026] Fig. 9 Schematic diagram of the dust collection component.

[0027] Fig.10 Schematic diagram of the internal structure of the dust collection component.

[0028] The following are marked in the figure: 1. mold body; 2. dust removal assembly; 21. dust collecting screen; 22. rubber scraper; 3. traction assembly; 31. traction roller; 32. traction plate; 33. motor; 34. traction rope; 4. clamping plate; 5. fixing assembly; 51. fixing plate; 52. mounting plate; 53. hydraulic rod; 54. pulley; 55. mounting ring; 6. air hood; 7. variable speed motor; 8. grinding assembly; 81. sliding sleeve; 82. cylinder; 83. annular plate; 84. take-up roller; 85. friction head; 86. pull rope; 87. pressure plate; 88. pressure head; 89. rubber pad; 9. air pipe; 10. dust suction assembly; 101. rubber hose; 102. dust bag; 103. dust suction head; 104. one-way plate one; 105. one-way plate two. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 6 A grinding device for a prestressed concrete pile mold, comprising a mold body 1, a traction assembly 3 and a grinding assembly 8, wherein a clamping plate 4 is installed at one end of the mold body 1, and the traction assembly 3 is fixedly installed on the clamping plate 4, and a fixing assembly 5 is arranged at the other end of the mold body 1, and the fixing assembly 5 comprises a fixing plate 51 and a retractable pulley 54, and a variable speed motor 7 is fixedly installed on the fixing plate 51, and the pulley 54 presses against the inner wall of the mold body 1;

[0031] The grinding assembly 8 includes a sleeve 81, an annular plate 83, a plurality of retractable friction heads 85 and a pull rope 86. The output shaft of the variable speed motor 7 passes through the sleeve 81 and is slidably connected to the sleeve 81. A take-up roller 84 is fixedly installed on the output shaft of the variable speed motor 7. A cylinder 82 is installed on the sleeve 81. The output end of the cylinder 82 is connected to the annular plate 83. A plurality of friction heads 85 are installed on the annular plate 83. The plurality of friction heads 85 are pressed against the inner wall of the mold body 1. One end of the pull rope 86 is fixedly installed on the annular plate 83. The pull rope 86 passes through the annular plate 83 and clamps the friction head 85 through the pressure plate 87. The other end of the pull rope 86 is fixedly connected to the take-up roller 84. The traction assembly 3 is connected to the grinding assembly 8.

[0032] Specifically, the traction assembly 3 includes a traction rope 34, a traction plate 32 is installed on the clamping plate 4, a traction roller 31 is provided on the traction plate 32, the traction roller 31 is coaxially connected to the motor 33, one end of the traction rope 34 is connected to the traction roller 31, and the other end of the traction rope 34 is connected to the grinding assembly 8.

[0033] It should be noted that since the inner wall of the mold body 1 is an irregular circle, during the grinding process, there are differences in the degree of wear of several friction heads 85, and some friction heads 85 will be severely worn. These severely worn friction heads 85 will lose contact with the inner wall of the mold body 1, making it difficult to grind the inner wall of the mold body 1 again, which will lead to reduced grinding efficiency and some areas cannot be polished. Therefore, a friction head 85 that can be adjusted in real time is needed to solve the above problem.

[0034] It should be noted that, before using the present invention, the upper and lower molds of the mold body 1 need to be assembled and fixed, then the fixing assembly 5 is placed in one end of the mold body 1, and then the hydraulic rod 53 is started, the hydraulic rod 53 drives the pulley 54 to abut against the inner wall of the mold body 1, and the variable speed motor 7 and the grinding assembly 8 are fixed in the mold body 1; then the clamping plate 4 is clamped at the other end of the mold body 1, and then the traction rope 34 on the traction assembly 3 is connected to the grinding assembly 8. Start the cylinder 82, the cylinder 82 drives the annular plate 83 to move toward the inner wall of the mold body 1, so that the friction head 85 on the annular plate 83 contacts the inner wall of the mold body 1, and the cylinder 82 is closed when the spring at the bottom of the friction head 85 is pressed to a certain extent.

[0035] When in use, the variable speed motor 7 is started, and the variable speed motor 7 drives the wire take-up roller 84 to rotate, and the wire take-up roller 84 tightens the pull rope 86, so that the pull rope 86 clamps the friction head 85 through the pressure plate 87, thereby fixing the friction head 85. As the wire take-up roller 84 rotates, the wire take-up roller 84 drives the annular plate 83 to rotate through the pull rope 86, and in this process, the friction head 85 on the annular plate 83 grinds the inner wall of the mold body 1.

[0036] When part of the friction head 85 is seriously worn, the speed of the variable speed motor 7 is reduced. At the moment when the speed of the variable speed motor 7 is reduced, the annular plate 83 continues to rotate due to inertia. At this time, the speed of the annular plate 83 is greater than the speed of the take-up roller 84. The annular plate 83 and the take-up roller 84 form a speed difference, so that the pull rope 86 is in a relaxed state, and the pressure plate 87 on the pull rope 86 is released from the clamping of the friction head 85. The spring at the bottom of the friction head 85 rebounds, so that the friction head 85 is against the inner wall of the mold body 1, so that the seriously worn friction head 85 contacts the inner wall of the mold body 1 again. Then the speed of the variable speed motor 7 is increased, so that the variable speed motor 7 drives the pull rope 86 to tighten through the take-up roller 84. At this time, the pressure plate 87 clamps the friction head 85 again, so that the friction head 85 can continue to grind the inner wall of the mold body 1, ensuring that the friction head 85 can grind every part of the inner wall of the mold body 1, improving the smoothness of the inner wall of the mold body 1, and then facilitating the demoulding of the pipe pile.

[0037] See also Figure 5-Figure 6 The fixing assembly 5 also includes a mounting plate 52 and a hydraulic rod 53. One end of the mounting plate 52 is connected to the fixing plate 51, and the other end of the mounting plate 52 is connected to the mounting ring 55. The output shaft of the variable speed motor 7 passes through the mounting ring 55 and slides with the mounting ring 55. The hydraulic rod 53 is installed on the side wall of the mounting plate 52, and the output end of the hydraulic rod 53 is connected to the pulley 54.

[0038] It should be noted that the purpose of the fixing component 5 is to fix the variable speed motor 7 and the grinding component 8 on the inner wall of the mold body 1. At the same time, when the grinding component 8 is grinding the inner wall of the mold body 1, the traction component 3 will pull the variable speed motor 7 and the grinding component 8 through the traction rope 34. At this time, the pulley 54 will slide along the inner wall of the mold body 1 to ensure that the variable speed motor 7 and the grinding component 8 move smoothly along the inner wall of the mold body 1.

[0039] See also Figure 2-Figure 5 The air pipe 9 is coaxially mounted on the output shaft of the variable speed motor 7, and the dust removal component 2 is mounted on the clamping plate 4. The dust removal component 2 includes a dust collecting screen 21 and a rubber scraper 22. The rubber scraper 22 is mounted on the fixed plate 51, and the dust collecting screen 21 is mounted on the clamping plate 4.

[0040] It should be noted that during the grinding process of the grinding assembly 8 grinding the inner wall of the mold body 1, dust floats and debris splashes. In order to avoid dust and debris splashing out of the mold body 1 during the grinding process to affect the health of the workers, the present invention installs a rubber scraper 22 on the fixing plate 51 and a dust collecting screen 21 on the clamping plate 4. During the grinding process, the traction component 3 pulls the grinding component 8 and the rubber scraper 22 together toward the dust collecting mesh plate 21. At this time, the rubber scraper 22 enters the interior of the mold body 1. During the process of the grinding component 8 grinding the inner wall of the mold body 1, the air pipe 9 is started. As the variable speed motor 7 rotates, the variable speed motor 7 can drive the air pipe 9 to rotate, so that the air pipe 9 blows the dust on the top and bottom of the inner wall of the mold body 1 toward the dust collecting mesh plate 21 and the dust collecting mesh plate 21 blocks it, preventing debris and dust from being output from the mold body 1 and causing harm to the workers' bodies; during the process of the traction component 3 pulling the grinding component 8 and the rubber scraper 22 toward the dust collecting mesh plate 21, the extension of the rubber scraper 22 can scrape off the dust and debris remaining on the inner wall of the mold body 1, thereby improving the cleanliness of the inner wall of the mold body 1.

[0041] See also Figure 4 The air exchange cover 6 is installed on the fixing plate 51, and the air exchange cover 6 is connected to the variable speed motor 7.

[0042] It should be noted that during the operation of the variable speed motor 7, dust and debris can easily enter the variable speed motor 7 through the blades of the variable speed motor 7, which can easily cause damage to the variable speed motor 7. Therefore, the present invention installs an air change cover 6 on the fixed plate 51, and connects the blades at the tail end of the variable speed motor 7 to the air change cover 6. When the variable speed motor 7 is working, the rubber scraper 22 on the fixed plate 51 can isolate the dust and debris polished on the inner wall of the mold body 1, preventing them from entering the variable speed motor 7 through the blades of the variable speed motor 7, thereby increasing the service life of the variable speed motor 7.

[0043] See also Figure 7-Figure 10 The friction head 85 is connected to the annular plate 83 through a spring, and a dust collection component 10 is installed between the pressure plate 87 and the friction head 85. A pressure head 88 is installed at one end of the dust collection component 10 away from the pressure plate 87. The pressure head 88 clamps the side wall of the friction head 85 through a rubber pad 89.

[0044] Specifically, the dust collection assembly 10 includes a hose 101, a dust collection head 103 installed on the top of the hose 101, and a dust collection bag 102 installed on the bottom of the hose 101. The hose 101 is connected to the dust collection head 103 through a one-way plate 104, and the hose 101 is connected to the dust collection bag 102 through a one-way plate 2 105.

[0045] It should be noted that, when the friction head 85 is grinding the inner wall of the mold body 1, debris and dust are likely to adhere to the side wall of the friction head 85. When the friction head 85 rotates to the bottom of the mold body 1, the debris and dust are likely to fall and enter between the friction head 85 and the inner wall of the mold body 1, and are likely to scratch the inner wall of the mold body 1. Therefore, the present invention achieves cleaning of the friction head 85 by installing a dust collection assembly 10 inside the annular plate 83 to prevent dust and debris from adhering to the friction head 85.

[0046] It should be noted that the one-way plate 104 can only be opened from the bottom upwards, while the one-way plate 2 105 can be opened from the top downwards.

[0047] When in use, the variable speed motor 7 tightens the drawstring 86 through the take-up roller 84, and the drawstring 86 presses the hose 101 through the pressure plate 87. At this time, the gas in the hose 101 is squeezed out from the one-way plate 105, and then the pressure plate 87 drives the hose 101 and the pressure head 88 to move, so that the pressure head 88 clamps the friction head 85. When the speed of the variable speed motor 7 is reduced, the drawstring 86 is in a relaxed state, the pressure plate 87 is separated from the pressure on the hose 101, and the hose 101 is restored. At this time, the vacuum cleaner head 103 sucks the dust and debris on the side wall of the friction head 85 into the hose 101 through the one-way plate 1 104; when the variable speed motor 7 tightens the pull rope 86 again through the take-up roller 84, the pressure plate 87 squeezes the hose 101. At this time, the dust and debris inside the hose 101 will enter the dust collecting bag 102 through the one-way plate 2 105 for collection, preventing the dust and debris on the side wall of the friction head 85 from entering between the friction head 85 and the inner wall of the mold body 1, causing scratches on the inner wall of the mold body 1.

[0048] It should be noted that the contact surface between the pressure head 88 and the hose 101 is an arc surface. When the pressure plate 87 presses the hose 101, the arc surface on the pressure head 88 can ensure that the hose 101 deforms within the elastic range, avoiding excessive squeezing of the hose 101 by the pressure plate 87, resulting in damage to the hose 101.

[0049] The implementation principle of the present invention is:

[0050] Before use, the upper and lower molds of the mold body 1 need to be assembled and fixed, then the fixing assembly 5 is placed in one end of the mold body 1, and then the hydraulic rod 53 is started, and the hydraulic rod 53 drives the pulley 54 to abut against the inner wall of the mold body 1, and the variable speed motor 7 and the grinding assembly 8 are fixed in the mold body 1; then the clamping plate 4 is clamped at the other end of the mold body 1, and then the traction rope 34 on the traction assembly 3 is connected to the grinding assembly 8. Start the cylinder 82, and the cylinder 82 drives the annular plate 83 to move toward the inner wall of the mold body 1, so that the friction head 85 on the annular plate 83 contacts the inner wall of the mold body 1, and the cylinder 82 is closed when the spring at the bottom of the friction head 85 is pressed to a certain extent.

[0051] When in use, the variable speed motor 7 is started, and the variable speed motor 7 drives the wire take-up roller 84 to rotate, and the wire take-up roller 84 tightens the pull rope 86, so that the pull rope 86 clamps the friction head 85 through the pressure plate 87, thereby fixing the friction head 85. As the wire take-up roller 84 rotates, the wire take-up roller 84 drives the annular plate 83 to rotate through the pull rope 86. During this process, the friction head 85 on the annular plate 83 grinds the inner wall of the mold body 1. At the same time, the traction assembly 3 pulls the variable speed motor 7 and the grinding assembly 8 through the traction rope 34, so that the grinding assembly 8 slides along the inner wall of the mold body 1 through the pulley 54.

[0052] When part of the friction head 85 is seriously worn, the speed of the variable speed motor 7 decreases. At the moment when the speed of the variable speed motor 7 decreases, the annular plate 83 continues to rotate due to inertia. At this time, the speed of the annular plate 83 is greater than the speed of the take-up roller 84. The annular plate 83 and the take-up roller 84 form a speed difference, so that the pull rope 86 is in a relaxed state. At this time, the pressure plate 87 is separated from the squeezing of the hose 101, and the hose 101 is restored. The dust suction head 103 sucks the dust and debris on the side wall of the friction head 85 into the hose 101 through the one-way plate 104. At the same time, the pressure head 88 is separated from the clamping of the friction head 85, and the spring at the bottom of the friction head 85 rebounds, so that the friction head 85 is against the inner wall of the mold body 1, so that the seriously worn friction head 85 contacts the inner wall of the mold body 1 again. Then the speed of the variable speed motor 7 is increased, so that the variable speed motor 7 drives the pull rope 86 to tighten through the take-up roller 84. At this time, the pressure plate 87 squeezes the hose 101, and the dust and debris inside the hose 101 will enter the dust collecting bag 102 through the one-way plate 105, so as to prevent the dust and debris on the side wall of the friction head 85 from entering between the friction head 85 and the inner wall of the mold body 1, causing scratches on the inner wall of the mold body 1. At the same time, the pressure head 88 will clamp the friction head 85 again, so that the friction head 85 can continue to grind the inner wall of the mold body 1, ensuring that the friction head 85 can grind every part of the inner wall of the mold body 1, thereby improving the smoothness of the inner wall of the mold body 1, and thus facilitating the demoulding of the pipe pile.

[0053] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A grinding device for a prestressed concrete pile mold, characterized in that: The mold body (1) comprises a mold body (1), a traction assembly (3) and a grinding assembly (8); a clamping plate (4) is installed at one end of the mold body (1); the traction assembly (3) is fixedly installed on the clamping plate (4); a fixing assembly (5) is arranged at the other end of the mold body (1); the fixing assembly (5) comprises a fixing plate (51) and a retractable pulley (54); a variable speed motor (7) is fixedly installed on the fixing plate (51); and the pulley (54) presses against the inner wall of the mold body (1); The grinding assembly (8) comprises a sliding sleeve (81), an annular plate (83), a plurality of retractable friction heads (85) and a pull rope (86); the output shaft of the variable speed motor (7) passes through the sliding sleeve (81) and is slidably connected to the sliding sleeve (81); a take-up roller (84) is fixedly mounted on the output shaft of the variable speed motor (7); a cylinder (82) is mounted on the sliding sleeve (81); the output end of the cylinder (82) is connected to the annular plate (83); a plurality of friction heads (85) are mounted on the annular plate (83); the plurality of friction heads (85) are pressed against the inner wall of the mold body (1); one end of the pull rope (86) is fixedly mounted on the annular plate (83); the pull rope (86) passes through the annular plate (83) and clamps the friction head (85) through a pressure plate (87); the other end of the pull rope (86) is fixedly connected to the take-up roller (84); the traction assembly (3) is connected to the grinding assembly (8); The friction head (85) is connected to the annular plate (83) via a spring, a dust collecting assembly (10) is installed between the pressure plate (87) and the friction head (85), a pressure head (88) is installed at one end of the dust collecting assembly (10) away from the pressure plate (87), and the pressure head (88) clamps the side wall of the friction head (85) via a rubber pad (89); The dust collection assembly (10) comprises a hose (101), a dust collection head (103) mounted on the top of the hose (101), and a dust collection bag (102) mounted on the bottom of the hose (101); the hose (101) is connected to the dust collection head (103) via a one-way plate (104), and the hose (101) is connected to the dust collection bag (102) via a one-way plate (105).

2. A grinding device for a prestressed concrete pipe pile mold according to claim 1, characterized in that: The fixing assembly (5) further comprises a mounting plate (52) and a hydraulic rod (53); one end of the mounting plate (52) is connected to the fixing plate (51); the other end of the mounting plate (52) is connected to a mounting ring (55); an output shaft of the variable speed motor (7) passes through the mounting ring (55) and is slidably engaged with the mounting ring (55); a hydraulic rod (53) is mounted on a side wall of the mounting plate (52); and an output end of the hydraulic rod (53) is connected to a pulley (54).

3. A grinding device for a prestressed concrete pipe pile mold according to claim 1, characterized in that: An air pipe (9) is coaxially mounted on the output shaft of the variable speed motor (7); a dust removal assembly (2) is mounted on the clamping plate (4); the dust removal assembly (2) comprises a dust collecting screen (21) and a rubber scraper (22); the rubber scraper (22) is mounted on the fixing plate (51); and the dust collecting screen (21) is mounted on the clamping plate (4).

4. A grinding device for a prestressed concrete pipe pile mold according to claim 1, characterized in that: The fixed plate (51) is mounted with an air exchange cover (6), which is connected to the variable speed motor (7).

5. The grinding device for a prestressed concrete pipe pile mold according to claim 1, characterized in that: The traction assembly (3) comprises a traction rope (34), a traction plate (32) is mounted on the clamping plate (4), a traction roller (31) is arranged on the traction plate (32), the traction roller (31) is coaxially connected to the motor (33), one end of the traction rope (34) is connected to the traction roller (31), and the other end of the traction rope (34) is connected to the grinding assembly (8).

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