A polishing device for producing MPP power cable protection pipes

Abstract

This invention relates to the field of pipe grinding technology, and more particularly to a grinding device for producing MPP power cable protection pipes. The device includes a workbench and multiple support frames mounted on the upper surface of the workbench. Each support frame has an annular placement plate mounted on its upper surface for holding the cable protection pipe to be ground. Adjacent annular placement plates are arranged in a spaced-away configuration. Each support frame has a connecting frame mounted on its side wall, and each connecting frame has an outer grinding plate and an inner grinding plate mounted on its side wall, which respectively press against the outer and inner walls of the cable protection pipe. A support rod moves the outer grinding plate towards the outer wall of the cable protection pipe, while another support rod moves the inner grinding plate towards the inner wall of the cable protection pipe, achieving synchronous reverse feeding of the inner and outer grinding plates. This allows the outer and inner grinding plates to simultaneously press against both sides of the pipe wall, achieving synchronous grinding.

Description

Technical Field

[0001] This invention relates to the field of pipe grinding technology, and in particular to a grinding device for the production of MPP power cable protection pipes. Background Technology

[0002] MPP (modified polypropylene) power cable protection pipes are widely used in cable laying projects in municipal, power, and telecommunications fields due to their excellent insulation properties, heat resistance, and compressive strength. During the production process of MPP pipes, the ends and surfaces of the pipes after extrusion molding or cutting often have defects such as burrs, flash, or roughness. These defects not only affect the sealing of the connection between pipes, but may also scratch the cable insulation layer during cable installation, causing safety hazards. Therefore, before the pipes leave the factory, the inner and outer walls of their ends need to be ground to ensure that the flatness and smoothness of the pipe end faces meet the usage requirements.

[0003] Currently, most pipe grinding devices on the market use a single-sided grinding method, which means that the pipe is processed separately by an outer grinding roller or an inner grinding head. When the inner and outer walls of the same pipe need to be ground simultaneously, it is usually necessary to complete the grinding of one side first, then flip or re-clamp the pipe, change the grinding fixture, and then grind the other side. The operation process is cumbersome and the processing efficiency is low.

[0004] Although some equipment attempts to set up inner and outer grinding components at the same workstation, the inner and outer grinding plates usually adopt independent drive and adjustment mechanisms. This not only makes the structure complex and the equipment cost high, but also makes it difficult to ensure that the inner and outer grinding plates press against the pipe wall synchronously. This can easily lead to one side being over-pressed while the other side has poor contact, resulting in poor grinding uniformity.

[0005] Therefore, this application proposes a grinding device for the production of MPP power cable protection pipes. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: a grinding device for producing MPP power cable protection pipes, including a workbench and a support frame. Multiple support frames are provided and installed on the upper surface of the workbench. An annular placement plate is installed on the upper surface of each support frame. The annular placement plate is used to place the cable protection pipe to be ground. Adjacent annular placement plates are designed to be far apart. Each of the support frames is equipped with a connecting frame on its side wall. Each connecting frame is provided with an outer grinding plate and an inner grinding plate on its side wall. The connecting frame is provided with an adjustment mechanism on its side wall. The adjustment mechanism is used to drive the outer grinding plate and the inner grinding plate to move respectively, and to make the outer grinding plate and the inner grinding plate press against the outer wall and the inner wall of the cable protection pipe respectively.

[0008] Preferably, the adjustment mechanism includes a hydraulic cylinder installed on the side wall of the connecting frame, and two brackets are installed on the telescopic end of the hydraulic cylinder. The ends of the two brackets away from the hydraulic cylinder are jointly equipped with an assembly frame.

[0009] Preferably, the adjustment mechanism further includes a central gear rotatably disposed inside the assembly frame, and a ratchet plate one and a ratchet plate two are slidably disposed inside the assembly frame; both the ratchet plate one and the ratchet plate two are meshed with the central gear, a support rod one is installed on the side wall of the ratchet plate one, and a support rod two is installed on the side wall of the ratchet plate two; the end of the support rod one away from the ratchet plate one is connected to the outer grinding plate, and the side wall of the support rod two away from the ratchet plate two is connected to the inner grinding plate.

[0010] Preferably, the inner wall of the assembly frame is provided with a limiting groove that matches the first and second ratchet plates. The limiting groove is designed to facilitate the movement of the first and second ratchet plates on the axis and to ensure the stability of their movement, thereby facilitating the subsequent synchronous pressing of the outer and inner grinding plates against the outer and inner walls of the cable protection pipe.

[0011] Preferably, the ends of the first and second support rods away from the central gear are each equipped with a clamping plate. The clamping plate consists of two clamping blocks and a horizontal shaft. The two clamping blocks are rotatably mounted on the outer surface of the horizontal shaft. A torsion spring is provided at the connection between the clamping block and the outer surface of the horizontal shaft. Friction protrusions are provided on the end faces of the outer and inner grinding plates near the cable protection pipe.

[0012] Preferably, the upper surface of the workbench is equipped with multiple limiting rectangular frames, and each limiting rectangular frame has an annular toothed plate rotatably arranged inside. The cable protection tube to be processed passes through the interior of the annular toothed plate. The annular toothed plate is controlled by an external drive, and a clamping mechanism is provided inside the annular toothed plate. The clamping mechanism is used to clamp cable protection tubes of different diameters.

[0013] Preferably, the clamping mechanism includes two sliding frames fixedly installed on the inner wall of the annular toothed plate. The sliding frames are designed symmetrically on the inner wall of the annular toothed plate. Each sliding frame has a slidably arranged inclined toothed plate on its inner wall. An elastic telescopic rod is installed on the side of the inclined toothed plate away from the sliding frame. A fixed clamping plate is fixedly installed at the end of the elastic telescopic rod.

[0014] Preferably, a fixed bracket is fixedly installed on the inner wall of the annular toothed plate, and a helical gear is rotatably provided on the side wall of the fixed bracket. The helical gear and the first helical toothed plate are meshed together. A second helical toothed plate is slidably provided on the side wall of the annular toothed plate. The second helical toothed plate and the helical gear are meshed together. L-shaped push rods are installed on both sides of the telescopic end side wall of the hydraulic cylinder. The ends of the L-shaped push rods contact the side wall of the second helical toothed plate, and the contact method is point contact.

[0015] Preferably, a limiting groove frame is installed on the side wall of the annular toothed plate, and a limiting post is installed on the side wall of the second helical toothed plate. The end of the limiting post away from the second helical toothed plate is slidably disposed inside the limiting groove frame.

[0016] Preferably, the limiting groove frame has a guide groove inside, an electric rod one is installed on the groove wall of the guide groove, an electric rod two is installed on the telescopic end of the electric rod one, and a groove is opened on the surface of the limiting post, so that the telescopic end of the electric rod two can be inserted into the groove on the surface of the limiting post.

[0017] In summary, this application includes at least one of the following beneficial technical effects: 1. This invention utilizes a central gear built into the assembly frame to simultaneously engage ratchet plate one and ratchet plate two. Support rod one drives the outer grinding plate to move towards the outer wall of the cable protection pipe, while another support rod two drives the inner grinding plate to move towards the inner wall of the cable protection pipe. This achieves synchronous reverse feeding of the inner and outer grinding plates, allowing them to simultaneously press against both sides of the pipe wall. Compared to the existing method of grinding the inner and outer walls in stages, this structure ensures that the synchronous grinding of the inner and outer walls of the pipe end can be completed in a single clamping at the same workstation, avoiding grinding misalignment caused by pipe flipping or secondary clamping.

[0018] 2. The travel of ratchet plate one and ratchet plate two can be flexibly adjusted by the rotation angle of the central gear, making the distance between the outer and inner grinding plates adjustable to accommodate cable protection pipes of different wall thicknesses. Simultaneously, in the clamping mechanism, helical plate one is connected to the fixed clamping plate via an elastic telescopic rod. During the process of the L-shaped push rod pushing helical plate two, which is then driven by the helical gear to press the fixed clamping plate against the pipe wall, the elastic telescopic rod can undergo elastic compression, providing a variable clamping travel margin for the fixed clamping plate. This automatically adapts to cable protection pipes of different diameters, eliminating the need for repeated tooling changes or manual adjustment of the clamping distance for different pipe specifications. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the grinding device for producing MPP power cable protection pipes according to the present invention. Figure 2 This is a schematic diagram of the annular placement plate structure of the present invention; Figure 3 This is a top view of the structure of the present invention; Figure 4This is a schematic diagram of the structure of the fixed clamping plate in this invention; Figure 5 This is a schematic diagram of the L-shaped push rod structure of the present invention; Figure 6 This is a schematic diagram of the structure of the outer grinding plate of the present invention; Figure 7 This is a schematic diagram of the assembly frame structure of the present invention; Figure 8 This is a schematic diagram of the structure of the clamping block of the present invention; Figure 9 This is a schematic diagram of the ratchet plate structure of the present invention; Figure 10 This is a schematic diagram of the sliding frame structure of the present invention; Figure 11 This is a schematic diagram of the structure of the second helical toothed plate of the present invention; Figure 12 This is a schematic diagram of the structure of the fixing clamping plate of the present invention; Figure 13 This is a schematic diagram of the limiting groove frame of the present invention; Figure 14 This is a schematic diagram of the limiting post of the present invention.

[0020] Reference numerals: 1. Workbench; 2. Support frame; 3. Annular placement plate; 4. Connecting frame; 401. Outer grinding plate; 402. Inner grinding plate; 5. Hydraulic cylinder; 501. Bracket one; 6. Assembly frame; 101. Central gear; 601. Ratchet one; 602. Ratchet two; 603. Support rod one; 604. Support rod two; 7. Clamping plate; 701. Clamping block; 702. Horizontal shaft; 8. Limiting rectangular frame; 9. Annular toothed plate; 10. Sliding frame; 11. Helical toothed plate one; 111. Elastic telescopic rod; 12. Fixed clamping plate; 13. Fixed bracket; 131. Helical gear; 9. Annular toothed plate; 901. Helical toothed plate two; 14. L-shaped push rod; 15. Limiting groove frame; 16. Limiting post; 17. Guide groove; 18. Electric rod one; 19. Electric rod two. Detailed Implementation

[0021] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0023] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0024] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] like Figures 1 to 14 As shown, the present invention proposes a grinding device for producing MPP power cable protection pipes, including a workbench 1 and a support frame 2. Multiple support frames 2 are provided and installed on the upper surface of the workbench 1. Each support frame 2 has an annular placement plate 3 installed on its upper surface. The annular placement plate 3 is used to place the cable protection pipe to be ground. Adjacent annular placement plates 3 are designed to be far apart. Each of the support frame bodies 2 is equipped with a connecting frame 4 on its side wall. Each of the connecting frame 4 is provided with an outer grinding plate 401 and an inner grinding plate 402 on its side wall. The side wall of the connecting frame 4 is provided with an adjustment mechanism. The adjustment mechanism is used to drive the outer grinding plate 401 and the inner grinding plate 402 to move respectively, and to make the outer grinding plate 401 and the inner grinding plate 402 press against the outer wall and the inner wall of the cable protection pipe respectively. The adjustment mechanism includes a hydraulic cylinder 5 installed on the side wall of the connecting frame 4. Two brackets 501 are installed on the telescopic end of the hydraulic cylinder 5. The two brackets 501, which are away from the hydraulic cylinder 5, are jointly installed with an assembly frame 6. When it is necessary to grind the cable protection pipe during operation, the cable protection pipe to be ground is first transferred to the top of the annular placement plate 3 by an external robotic arm. The method of transferring the cable protection pipe to be ground by the robotic arm is the existing technology, and the details will not be elaborated further. Then, the extension and retraction end of the control cylinder 5 drives the two supports 501 to move synchronously, so that the two supports 501 drive the assembly frame 6, the outer grinding plate 401 and the inner grinding plate 402 to move closer to the cable protection pipe. Then the outer grinding plate 401 will be located on the outer wall of the cable protection pipe, and the inner grinding plate 402 will be located on the inner wall of the cable protection pipe. Since the movement of the outer grinding plate 401 and the inner grinding plate 402 is controlled by the adjustment mechanism, the outer grinding plate 401 can contact the outer wall of the cable protection pipe and the inner grinding plate 402 can contact the inner wall of the cable protection pipe under the synchronous control of the adjustment mechanism. This makes it convenient to perform synchronous grinding on the inner and outer walls of the cable protection pipe. Moreover, grinding plates are set at both ends of the cable protection pipe, so the two ends of the cable protection pipe can also be ground synchronously.

[0027] like Figures 2 to 10 As shown, the adjustment mechanism also includes a central gear 101 rotatably disposed inside the assembly frame 6, and a ratchet plate 601 and a ratchet plate 602 are slidably disposed inside the assembly frame 6. Both the first ratchet plate 601 and the second ratchet plate 602 are meshed with the central gear 101. A first support rod 603 is installed on the side wall of the first ratchet plate 601, and a second support rod 604 is installed on the side wall of the second ratchet plate 602. The end of the first support rod 603 away from the first ratchet plate 601 is connected to the outer grinding plate 401, and the side wall of the second support rod 604 away from the second ratchet plate 602 is connected to the inner grinding plate 402. During operation, when the outer grinding plate 401 is located on the outer wall of the cable protection pipe and the inner grinding plate 402 is located on the inner wall of the cable protection pipe, neither of them is in contact with the inner wall of the cable protection pipe yet. By controlling the rotation of the central gear 101, the central gear 101 will drive the ratchet plate 601 and ratchet plate 602 meshing with it to move. The ratchet plate 601 will drive the outer grinding plate 401 to contact the outer wall of the cable protection pipe through the support rod 603, and the ratchet plate 602 will drive the inner grinding plate 402 to contact the inner wall of the cable protection pipe through the support rod 604. This design allows the outer grinding plate 401 and the inner grinding plate 402 to move synchronously, making it convenient for them to press against the inner and outer walls of the cable protection pipe. Moreover, the outer grinding plate 401 and the inner grinding plate 402 are adjustable to accommodate cable protection pipes of different thicknesses, making operation more convenient.

[0028] Therefore, this invention achieves synchronous reverse feeding of the inner and outer grinding plates by having the central gear 101 built into the assembly frame 6 simultaneously mesh with the first ratchet plate 601 and the second ratchet plate 602. The outer grinding plate 401 moves towards the outer wall of the cable protection pipe, and the inner grinding plate 402 moves towards the inner wall of the cable protection pipe. This allows the outer grinding plate 401 and the inner grinding plate 402 to simultaneously press against both sides of the pipe wall. Compared with the existing method of grinding the inner and outer walls in steps, this structure ensures that the synchronous grinding of the inner and outer walls of the pipe port can be completed in one clamping at the same station, avoiding the grinding misalignment problem caused by pipe flipping or secondary clamping.

[0029] The inner wall of the assembly frame 6 is provided with a limiting groove that is adapted to the first ratchet plate 601 and the second ratchet plate 602. The limiting groove is designed to facilitate the movement of the first ratchet plate 601 and the second ratchet plate 602 on the axis and to ensure the stability of their movement, thereby facilitating the subsequent synchronous pressing of the outer grinding plate 401 and the inner grinding plate 402 against the outer and inner walls of the cable protection pipe.

[0030] Both the first support rod 603 and the second support rod 604 are equipped with clamping plates 7 at their ends away from the central gear 101. Each clamping plate 7 consists of two clamping blocks 701 and a horizontal shaft 702. Both clamping blocks 701 are rotatably mounted on the outer surface of the horizontal shaft 702. A torsion spring is provided at the connection between the clamping blocks 701 and the outer surface of the horizontal shaft 702. Friction protrusions are provided on the end faces of the outer grinding plate 401 and the inner grinding plate 402 near the cable protection pipe. During operation, since the two clamping blocks 701 are rotatably mounted on the outer surface of the horizontal shaft 702, when the outer grinding plate 401 and the inner grinding plate 402 are used and replaced multiple times, it is only necessary to pry open the two clamping blocks 701 to remove the damaged outer grinding plate 401 and the inner grinding plate 402, and then put in the new outer grinding plate 401 and the inner grinding plate 402. Moreover, a torsion spring is provided at the connection between the clamping block 701 and the outer surface of the horizontal shaft 702, which can ensure the clamping force between the two clamping blocks 701, which facilitates the subsequent grinding of the cable protection pipe.

[0031] Multiple limiting rectangular frames 8 are installed on the upper surface of the workbench 1. Each limiting rectangular frame 8 has an annular toothed plate 9 rotatably installed inside. The cable protection tube to be processed passes through the interior of the annular toothed plate 9. The annular toothed plate 9 is controlled by an external drive. The annular toothed plate 9 is equipped with a clamping mechanism inside. The clamping mechanism is used to clamp cable protection tubes of different diameters.

[0032] like Figures 6 to 14As shown, the clamping mechanism includes a sliding frame 10 fixedly installed on the inner wall of the annular toothed plate 9. Two sliding frames 10 are designed and symmetrically arranged on the inner wall of the annular toothed plate 9. Each sliding frame 10 has a slidably arranged inclined toothed plate 11 on its inner wall. An elastic telescopic rod 111 is installed on the side of the inclined toothed plate 11 away from the sliding frame 10. A fixed clamping plate 12 is fixedly installed at the end of the elastic telescopic rod 111.

[0033] During operation, when the cable protection tube is transferred by the external robotic arm to the top of the annular placement plate 3, the inclined toothed plate 11 is slidably set inside the slide frame 10. Therefore, as the inclined toothed plate 11 drives the fixed clamping plate 12 to move, the two corresponding fixed clamping plates 12 can press against the outer surface of the cable protection tube to be ground, thus fixing the cable protection tube. Moreover, since the two adjacent annular placement plates 3 are designed separately, after the cable protection tube is fixed and the outer grinding plate 401 and inner grinding plate 402 are adjusted, the annular toothed plate 9 is rotated by an external drive. The annular toothed plate 9 drives the slide frame 10, the fixed clamping plate 12, and the fixed cable protection tube to rotate, so that the inner and outer walls of the cable protection tube can be ground synchronously at the same time; that is, the positions of the outer grinding plate 401 and the inner grinding plate 402 remain unchanged, while the cable protection tube will rotate. It should be noted that the clamping force of the outer grinding plate 401 and the inner grinding plate 402 when they come into contact with the inner and outer walls of the cable protection pipe is controllable. This can prevent the clamping force of the outer grinding plate 401 and the inner grinding plate 402 on the inner and outer walls of the cable protection pipe from being too large, which would affect the subsequent rotation of the cable protection pipe.

[0034] A fixed bracket 13 is fixedly installed on the inner wall of the annular toothed plate 9, and a helical gear 131 is rotatably provided on the side wall of the fixed bracket 13. The helical gear 131 and the helical toothed plate 11 are meshed and connected. The annular toothed plate 9 has a helical toothed plate 901 slidably mounted on its side wall. The helical toothed plate 901 is meshed with the helical gear 131. L-shaped push rods 14 are installed on both sides of the telescopic end side wall of the oil cylinder 5. The end of the L-shaped push rod 14 contacts the side wall of the helical toothed plate 901, and the contact method is point contact.

[0035] During operation, in the initial state, i.e., before the outer grinding plate 401 and inner grinding plate 402 are fully adjusted and before the clamping plate 12 clamps the cable protection tube, when the extension and retraction end of the hydraulic cylinder 5 drives the two supports 501 to move, the extension and retraction end of the hydraulic cylinder 5 will simultaneously drive the L-shaped push rods 14 on both sides to move. Then, the ends of the L-shaped push rods 14 will contact the side wall of the helical gear plate 901 and push the helical gear plate 901 to move. Since the helical gear plate 901 is meshed with the helical gear 131, the helical gear plate 901... 01 will drive the helical gear plate 11 to move through the helical gear 131, so that the helical gear plate 111 will drive the elastic telescopic rod 111 and the fixed clamping plate 12 to move closer to the cable protection pipe. Then the elastic telescopic rods 111 on both sides will be pressed, and the fixed clamping plate 12 will press against the surface of the cable protection pipe. At this time, the outer grinding plate 401 and the inner grinding plate 402 will also move to the outer wall and inner wall of the cable protection pipe. Then, with further adjustment by the adjustment mechanism, the outer grinding plate 401 and the inner grinding plate 402 can be adjusted. This design allows for the simultaneous movement of the outer grinding plate 401 and the inner grinding plate 402, while also enabling the clamping of the cable protection pipe. Furthermore, the elastic telescopic rod 111 provides a certain amount of movement allowance, making it suitable for cable protection pipes of different diameters and highly practical.

[0036] The side wall of the annular toothed plate 9 is equipped with a limiting groove frame 15, and the side wall of the helical toothed plate 901 is equipped with a limiting post 16. The end of the limiting post 16 away from the helical toothed plate 901 is slidably disposed inside the limiting groove frame 15.

[0037] The limiting groove frame 15 has a guide groove 17 inside, and an electric rod 18 is installed on the groove wall of the guide groove 17. An electric rod 19 is installed on the telescopic end of the electric rod 18. The surface of the limiting post 16 has a groove, and the telescopic end of the electric rod 19 can be inserted into the groove on the surface of the limiting post 16. During operation, since the helical tooth plate 2 901 is slidably set inside the limiting groove frame 15 through the limiting post 16, when the helical tooth plate 2 901 moves, the limiting post 16 on its side wall will slide inside the limiting groove frame 15. After the cable protection pipe is fixed, the extension end of the electric rod 18 is moved by controlling the extension end of the electric rod 18, which will drive the electric rod 2 19 to move. Then, the extension end of the electric rod 2 19 is locked in the limiting post 16. In this way, the limiting post 16, the helical tooth plate 2 901, the limiting groove frame 15, the sliding frame 10, the fixed bracket 13, the helical gear 131 and the ring tooth plate 9 can be integrated into one, so that the ring tooth plate 9 can drive these mechanisms and the cable protection pipe to rotate, and can make the elastic telescopic rod 111 in a accumulating state. Moreover, since the end of the L-shaped push rod 14 is in point contact with the side wall of the helical tooth plate 901, the helical tooth plate 901 will not drive the L-shaped push rod 14 to rotate during the rotation process. After one grinding is completed, the annular toothed plate 9 is adjusted to the initial position, and when the ground cable protection tube is removed by the external robot arm, the fixed clamping plate 12, the second helical toothed plate 901, the helical gear 131, and the first helical toothed plate 11 will return to the initial position under the elastic recovery action of the elastic telescopic rod 111, thus facilitating the subsequent grinding of the cable protection tube.

[0038] In this invention, while the extension end of the hydraulic cylinder 5 drives the assembly frame 6 and the grinding plate to approach the pipe, it simultaneously drives the L-shaped push rod 14 to push the helical tooth plate 901 to slide, and the fixed clamping plate 12 completes the automatic clamping of the pipe, realizing the linkage between the grinding feed and the pipe clamping action, reducing the number of independent clamping drive components; in addition, the limiting post 16 on the side wall of the helical tooth plate 901 cooperates with the limiting groove frame 15, and after the extension end of the electric rod 19 is inserted into the limiting post groove, the helical tooth plate 901 and the annular tooth plate 9 are connected as one unit, so that the clamping mechanism can rotate with the annular tooth plate 9 to drive the pipe to rotate, and the outer grinding plate 401 and the inner grinding plate 402 can remain stationary to complete the circumferential grinding, simplifying the motion mechanism of the grinding execution end.

[0039] Working principle: When the cable protection pipe needs to be polished, the cable protection pipe to be polished is first transferred to the top of the annular placement plate 3 by an external robotic arm. The method of transferring the cable protection pipe to be polished by the robotic arm is existing technology and will not be described in detail. Then, the extension end of the control cylinder 5 drives the two brackets 501 to move synchronously, so that the two brackets 501 drive the assembly frame 6, the outer polishing plate 401 and the inner polishing plate 402 to move closer to the cable protection pipe. After that, the outer polishing plate 401 will be located on the outer wall of the cable protection pipe, and the inner polishing plate 402 will be located on the inner wall of the cable protection pipe. The extension and retraction end of the hydraulic cylinder 5 will simultaneously drive the L-shaped push rods 14 on both sides to move. Then, the end of the L-shaped push rod 14 will contact the side wall of the second helical tooth plate 901 and push the second helical tooth plate 901 to move. Since the second helical tooth plate 901 is meshed with the helical gear 131, the second helical tooth plate 901 will drive the first helical tooth plate 11 to move through the helical gear 131. This causes the first helical tooth plate 11 to drive the elastic telescopic rod 111 and the fixed clamping plate 12 to move closer to the cable protection pipe. Then, the elastic telescopic rods 111 on both sides will be pressed, and the fixed clamping plate 12 will press against the surface of the cable protection pipe. At this time, the outer grinding plate 401 and the inner grinding plate 402 will also move to the outer wall and inner wall of the cable protection pipe. Then, with further adjustment by the adjustment mechanism, the outer grinding plate 401 and the inner grinding plate 402 can be adjusted. When the outer grinding plate 401 is located on the outer wall of the cable protection pipe, and the inner grinding plate 402 is located on the inner wall of the cable protection pipe, neither of them is in contact with the inner wall of the cable protection pipe yet. By controlling the rotation of the central gear 101, the central gear 101 will drive the ratchet plate 601 and ratchet plate 602 meshing with it to move. The ratchet plate 601 will drive the outer grinding plate 401 to contact the outer wall of the cable protection pipe through the support rod 603, and the ratchet plate 602 will drive the inner grinding plate 402 to contact the inner wall of the cable protection pipe through the support rod 604. This design allows the outer grinding plate 401 and the inner grinding plate 402 to move synchronously, making it convenient for them to press against the inner and outer walls of the cable protection pipe. Moreover, the outer grinding plate 401 and the inner grinding plate 402 can be adjusted to adapt to cable protection pipes of different thicknesses, making the operation more convenient. When the helical toothed plate 901 moves, the limiting post 16 on its side wall slides inside the limiting groove frame 15. After the cable protection tube is fixed, the extension end of the electric rod 18 is moved by controlling the extension end of the electric rod 18, which in turn drives the electric rod 19 to move. Then, the extension end of the electric rod 19 is locked in the limiting post 16, so that the limiting post 16, the helical toothed plate 901, the limiting groove frame 15, the sliding frame 10, the fixed bracket 13, the helical gear 131 and the ring toothed plate 9 form an integral unit. By controlling the rotation of the ring toothed plate 9 by an external drive, the ring toothed plate 9 drives the sliding frame 10, the helical toothed plate 901, the fixed clamping plate 12 and the fixed cable protection tube to rotate, so that the inner and outer walls of the cable protection can be polished simultaneously. That is, the positions of the outer polishing plate 401 and the inner polishing plate 402 remain unchanged, while the cable protection tube will rotate, thereby completing the polishing process.

[0040] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A grinding device for producing MPP power cable protection pipes, comprising a workbench (1), characterized in that, It also includes a support frame (2), multiple support frames (2) are provided and installed on the upper surface of the workbench (1). Each support frame (2) has an annular placement plate (3) installed on its upper surface. The annular placement plate (3) is used to place the cable protection pipe to be polished. Adjacent annular placement plates (3) are designed to be far apart. Each of the support frames (2) is equipped with a connecting frame (4) on its side wall. Each of the connecting frames (4) is provided with an outer grinding plate (401) and an inner grinding plate (402) on its side wall. The connecting frame (4) is provided with an adjustment mechanism on its side wall. The adjustment mechanism is used to drive the outer grinding plate (401) and the inner grinding plate (402) to move respectively, and to make the outer grinding plate (401) and the inner grinding plate (402) press against the outer wall and the inner wall of the cable protection pipe respectively.

2. The grinding device for producing MPP power cable protection pipes according to claim 1, characterized in that, The adjustment mechanism includes a hydraulic cylinder (5) installed on the side wall of the connecting frame (4). Two brackets (501) are installed on the telescopic end of the hydraulic cylinder (5). The ends of the two brackets (501) away from the hydraulic cylinder (5) are jointly equipped with an assembly frame (6).

3. A grinding device for producing MPP power cable protection pipes according to claim 2, characterized in that, The adjustment mechanism also includes a central gear (101) rotatably disposed inside the assembly frame (6), and a ratchet plate one (601) and a ratchet plate two (602) are slidably disposed inside the assembly frame (6). Both the first ratchet plate (601) and the second ratchet plate (602) are meshed with the central gear (101). The first ratchet plate (601) has a support rod (603) installed on its side wall, and the second ratchet plate (602) has a support rod (604) installed on its side wall. The end of the first support rod (603) away from the first ratchet plate (601) is connected to the outer grinding plate (401), and the side wall of the second support rod (604) away from the second ratchet plate (602) is connected to the inner grinding plate (402).

4. A grinding device for producing MPP power cable protection pipes according to claim 3, characterized in that, The inner wall of the assembly frame (6) is provided with a limiting groove that is compatible with the first ratchet plate (601) and the second ratchet plate (602).

5. A grinding device for producing MPP power cable protection pipes according to claim 3, characterized in that, Both the first support rod (603) and the second support rod (604) are equipped with clamping plates (7) at their ends away from the central gear (101). The clamping plates (7) consist of two clamping blocks (701) and a horizontal shaft (702). Both clamping blocks (701) are rotatably mounted on the outer surface of the horizontal shaft (702). A torsion spring is provided at the connection between the clamping blocks (701) and the outer surface of the horizontal shaft (702). Friction protrusions are provided on the end faces of the outer grinding plate (401) and the inner grinding plate (402) near the cable protection pipe.

6. A grinding device for producing MPP power cable protection pipes according to claim 5, characterized in that, The upper surface of the workbench (1) is equipped with multiple limiting rectangular frames (8). Each limiting rectangular frame (8) has an annular toothed plate (9) rotatably installed inside. The cable protection tube to be processed passes through the interior of the annular toothed plate (9). The annular toothed plate (9) is controlled by an external drive. The annular toothed plate (9) is equipped with a clamping mechanism inside. The clamping mechanism is used to clamp cable protection tubes of different diameters.

7. A grinding device for producing MPP power cable protection pipes according to claim 6, characterized in that, The clamping mechanism includes a sliding frame (10) fixedly installed on the inner wall of the annular toothed plate (9). Two sliding frames (10) are designed and are symmetrically designed on the inner wall of the annular toothed plate (9). Each sliding frame (10) has a slidably arranged inclined toothed plate (11) on its inner wall. An elastic telescopic rod (111) is installed on the side of the inclined toothed plate (11) away from the sliding frame (10). A fixed clamping plate (12) is fixedly installed at the end of the elastic telescopic rod (111).

8. A grinding device for producing MPP power cable protection pipes according to claim 7, characterized in that, A fixed bracket (13) is fixedly installed on the inner wall of the annular toothed plate (9), and a helical gear (131) is rotatably provided on the side wall of the fixed bracket (13). The helical gear (131) and the helical toothed plate (11) are meshed and connected. The side wall of the annular toothed plate (9) is slidably provided with a helical toothed plate (901), which meshes with the helical gear (131). Both sides of the telescopic end side wall of the oil cylinder (5) are equipped with L-shaped push rods (14). The end of the L-shaped push rod (14) contacts the side wall of the helical toothed plate (901) and the contact method is point contact.

9. A grinding device for producing MPP power cable protection pipes according to claim 8, characterized in that, The side wall of the annular toothed plate (9) is equipped with a limiting groove frame (15), and the side wall of the inclined toothed plate (901) is equipped with a limiting post (16). The end of the limiting post (16) away from the inclined toothed plate (901) is slidably disposed inside the limiting groove frame (15).

10. A grinding device for producing MPP power cable protection pipes according to claim 9, characterized in that, The limiting groove frame (15) has a guide groove (17) inside. An electric rod (18) is installed on the groove wall of the guide groove (17). An electric rod (2) (19) is installed on the telescopic end of the electric rod (18). A groove is opened on the surface of the limiting post (16). The telescopic end of the electric rod (2) (19) can be inserted into the groove on the surface of the limiting post (16).

Images