MPP cable protection pipe cutting device and method

Abstract

The invention belongs to the technical field of MPP cable protection pipe production, and particularly relates to an MPP cable protection pipe cutting device and method.The MPP cable protection pipe cutting device comprises a machining base, a liftable placing block is arranged on the machining base, a U-shaped mounting plate is fixedly connected to the upper end of the machining base, a fixing block is fixedly connected to the lower position of the U-shaped mounting plate through two first supporting rods, and the fixing block is fixedly connected to the lower end of the U-shaped mounting plate through two second supporting rods; a control cylinder is arranged below the fixing block, a plurality of extension rod sets distributed in a circumferential array mode are arranged on the circumferential side of the control cylinder, and a cutting wheel is arranged on the side, close to the inner wall of the pipeline, of each extension rod set. The cutting feeding mechanism is used for moving the cutting wheel to be attached to the inner wall of the pipeline and then enabling the cutting wheel to move by the distance the same as the thickness of the pipeline. The cutting feeding mechanism is arranged, a two-step adjusting mode of hydraulically driving the first feeding block and driving the second feeding block through the thermal deformation block is matched with linkage feedback of the control mechanism, and MPP pipes with different diameters and wall thicknesses can be automatically adapted.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of MPP cable protection pipe production, in particular to a MPP cable protection pipe cutting device and method. BACKGROUND

[0002] MPP cable protection pipe is a hard plastic pipe made of modified polypropylene as the main raw material, which is mainly used for the laying protection of underground cables (such as power cables, communication cables, etc.). It has the characteristics of high temperature resistance, high pressure resistance, impact resistance, corrosion resistance, good insulation, light weight, convenient construction, etc., which can effectively protect the cable from the influence of underground environment (such as soil pressure, underground water erosion, mechanical damage, etc.), and is widely used in underground pipeline engineering in the fields of municipal, power, communication, etc.

[0003] The length of MPP cable protection pipe is usually fixed (such as 6 meters, 9 meters, etc.), but in actual construction, the length of cable laying path, turning angle, and connection position with other pipelines are often irregular. By cutting, the pipe can be adjusted to meet the actual needs of the site, ensuring that the pipeline can accurately match the laying path, avoiding waste due to excessive length or unstable connection due to insufficient length.

[0004] However, the existing MPP cable protection pipe cutting device has the following technical defects:

[0005] 1. Poor adaptability: traditional cutting devices mostly use single blade for cutting, which needs to be manually adjusted according to the diameter of the pipe. The adaptability of different specifications (diameter 50mm-300mm) is poor, and frequent adjustment not only consumes time, but also easily leads to cutting failure due to operation error;

[0006] 2. Low cutting precision: single blade cutting path is long, and the pipe is easy to deform radially due to uneven stress during cutting, resulting in poor cutting flatness (error often exceeds 1mm), and even pipe tearing phenomenon, affecting the sealing of subsequent pipe connection;

[0007] 3. Difficulty in controlling cutting depth: MPP pipe wall thickness varies (usually 5mm-20mm), and existing devices cannot automatically adjust the cutting depth according to the wall thickness, which easily leads to "cutting not through" or "excessive cutting damage to the inner wall", and needs to be manually calibrated repeatedly, which is low in efficiency;

[0008] 4. Insufficient clamping stability: pipe fixing during cutting mostly uses single outer wall clamping or inner wall support, which easily leads to axial deviation of the pipe due to uneven clamping force distribution, further aggravating the cutting error. SUMMARY

[0009] The present application aims to solve the problems in the background art, and provides a MPP cable protection pipe cutting device and method which automatically adapts to MPP cable protection pipes with different diameters and wall thicknesses through a two-step adjustment mode of "hydraulic drive first feeding block + thermal deformation block drive second feeding block" and linkage feedback of the control mechanism.

[0010] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0011] A MPP cable protection pipe cutting device comprises:

[0012] A machining seat is provided with a liftable placing block, the upper end of the machining seat is fixedly connected with a U-shaped mounting plate, the lower position of the U-shaped mounting plate is fixedly connected with a fixed block through two first supporting rods, the lower position of the fixed block is provided with a control cylinder, the circumferential side of the control cylinder is provided with a plurality of extension rod groups arranged in a circumferential array, and each extension rod group is provided with a cutting wheel on the side close to the inner wall of the pipeline.

[0013] A cutting feeding mechanism is used to firstly move the cutting wheel to be attached to the inner wall of the pipeline and then move the cutting wheel by a distance equal to the thickness of the pipeline, the cutting feeding mechanism comprises a spline shaft rotatably connected to the lower end of the fixed block, a first screw rod is rotatably connected to the inner top wall of the control cylinder, the first screw rod is penetrated by the spline shaft, and a spline groove matched with the spline shaft is formed at the position penetrated by the first screw rod, a piston plate is sealingly and vertically slidably connected in the control cylinder, the piston plate is sealingly and threadedly connected with the first screw rod, a transfusion frame is sealingly and rotatably connected to the circumferential wall of the control cylinder, a hollow cylinder is fixedly connected to the circumferential wall of the transfusion frame, the hollow cylinder, the transfusion frame and the control cylinder are in communication with each other, a first feeding block is sealingly and slidably connected in the hollow cylinder, a push rod is fixedly connected to the side of the first feeding block away from the control cylinder, a side groove is formed in the push rod, a second feeding block is slidably connected in the side groove, a thermal deformation block is arranged between the second feeding block and the inner wall of the side groove, a heating sheet is fixedly connected to the inner wall of the side groove and in contact with the thermal deformation block, and the first feeding block and the second feeding block jointly act on the position adjustment of the cutting wheel.

[0014] Preferably, a fixed rod extending out of the side groove is fixedly connected to the side of the second feeding block away from the control cylinder, a U-shaped block is fixedly connected to one end of the fixed rod, the cutting wheel is rotatably connected between the upper and lower walls of the U-shaped block, and a first motor for driving the cutting wheel is fixedly connected to the upper end of the U-shaped block.

[0015] Preferably, a liquid storage space is formed between the space below the piston plate in the control cylinder, the transfusion frame and the hollow cylinder, and the liquid storage space is filled with hydraulic oil.

[0016] Preferably, the lower end of the fixed block is fixedly connected with an electric hoist, the upper end of the control cylinder is hingedly connected with a guide wheel through a first hinging seat, a winding rope is sleeved between the electric hoist and the guide wheel, and the electric hoist is used for adjusting the height of the control cylinder and the cutting wheel.

[0017] Preferably, the upper end of the infusion frame is fixedly connected with a tooth ring, the outer wall of the control cylinder is fixedly connected with a mounting block, the lower end of the mounting block is fixedly connected with a micro motor, and the output end of the micro motor is fixedly connected with a driving gear wheel which is in mesh with the tooth ring.

[0018] Preferably, a clamping mechanism is arranged above the fixed block and used for clamping and fixing the inner wall and the outer wall of the pipeline, the clamping mechanism comprises a second screw rod which is rotationally connected to the upper end of the fixed block, a lifting block which is threadedly connected to the second screw rod, two groups of second hinging seats which are symmetrically arranged at the lower end of the lifting block and the upper end of the fixed block, an inner clamping plate which is arranged between each group of second hinging seats, two third hinging seats which are arranged on the side of the inner clamping plate close to the second screw rod, a connecting rod which is arranged between each third hinging seat and the corresponding position second hinging seat, a worm which is coaxially rotationally connected to the upper end of the second screw rod, a U-shaped mounting plate which is fixedly connected to the top end of the worm, a rotating rod which is rotationally connected to the lower end of the U-shaped mounting plate through two support rods, a worm wheel which is fixedly connected to the center position of the rotating rod and cooperates with the worm, narrow gear wheels which are arranged on the two sides of the rotating rod, a guide rail which is fixedly connected to each inner clamping plate through an L-shaped rod, a third screw rod which is rotationally connected to the guide rail, wide gear wheels which are fixedly connected to the part of the third screw rod extending out of the guide rail and are in mesh with the narrow gear wheels, a moving plate which is threadedly connected to the third screw rod and is slidingly connected to the inner wall of the guide rail in the horizontal direction, and an outer clamping plate which is fixedly connected to the lower end of the moving plate.

[0019] Preferably, the driving mechanism comprises an electric telescopic rod which is fixedly connected to the lower end of the U-shaped mounting plate, a connecting block which is fixedly connected to the output end of the electric telescopic rod, a second motor which is fixedly connected to one side wall of the connecting block, a driving bevel gear which is rotationally connected to the other side wall of the connecting block and is driven by the second motor, an upper bevel gear and a lower bevel gear which are respectively fixedly connected to the second screw rod and the worm, and the driving bevel gear selectively meshes with the upper bevel gear and the lower bevel gear.

[0020] Preferably, a control mechanism is further arranged between the clamping mechanism and the cutting feeding mechanism, for automatically controlling the cutting initial position and cutting distance of the cutting wheel according to the position of the inner clamping plate and the relative distance between the inner clamping plate and the outer clamping plate, the control mechanism comprising a support block fixedly connected to the upper end of the guide rail, a resistance rod fixedly connected to the support block, a sliding sheet slidingly connected to the resistance rod and fixedly connected with the moving plate, a sliding rheostat formed between the resistance rod and the sliding sheet, and a heating sheet electrically connected with the sliding rheostat, and the second lead screw is coaxially fixedly connected with the spline shaft.

[0021] A method for cutting MPP cable protection pipes using the cutting device, comprising the following steps:

[0022] S1, pipe placement: place the pipe on the liftable placement block of the processing seat, after the pipe placement is completed and the liftable placement block is lifted and reset, the upper end of the pipe is between the inner clamping plate and the outer clamping plate, ensuring the operation of the subsequent clamping mechanism;

[0023] S2, pipe fixing: first make the electric telescopic rod in the extended state, turn on the second motor, at this time drive the bevel gear to engage with the lower bevel gear, make the inner clamping plate between the lifting block and the fixed block expand outward until contact with the inner wall of the pipe, then make the electric telescopic rod in the retracted state, drive the bevel gear to engage with the upper bevel gear, drive the outer clamping plate inward through the moving plate until it contacts the outer wall of the pipe, realize the clamping and fixing of the inner and outer walls of the pipe, and avoid deformation of the pipe during cutting;

[0024] S3, cutting position adjustment: the height position of the control cylinder on the spline shaft can be adjusted by the electric hoist, so as to adjust the cutting position of the cutting wheel to the pipe;

[0025] S4, pipe cutting: the first lead screw is driven to rotate by the spline shaft, the hydraulic oil in the control cylinder is delivered to the hollow cylinder through the delivery frame, the position of the first feeding block in the hollow cylinder is adjusted, so that the position of the cutting wheel controlled by the first feeding block always matches the inner clamping plate, the moving plate moves to drive the sliding sheet to move on the resistance rod, the power of the heating sheet is adjusted, the cutting depth of the cutting wheel controlled by the second feeding block matches the distance between the inner clamping plate and the outer clamping plate, and the cutting range is always just right, so as to improve the application range.

[0026] Compared with the prior art, the MPP cable protection pipe cutting device and method has the advantages that:

[0027] 1. The application is equipped with a cutting feeding mechanism, which can automatically adapt to MPP pipes with different diameters (50-300 mm) and wall thicknesses (5-20 mm) through the two-step adjustment mode of "hydraulic drive first feeding block + hot deformation block drive second feeding block" and the linkage feedback of the control mechanism. The first feeding block adjusts the adhesion of the cutting wheel and the inner wall of the pipe through the hydraulic oil pressure, which can adapt to different inner diameters. The second feeding block precisely controls the cutting depth through the expansion of the hot deformation block, which matches the pipe wall thickness and completes the parameter adaptation without manual intervention, thereby improving the application range.

[0028] 2. The application is equipped with multiple groups of cutting wheels arranged in a circumferential array, which can expand and cut outward from the inner wall of the pipe synchronously, replacing the traditional single-blade cutting mode and avoiding the pipe tearing problem caused by the long cutting path of the single-blade. The synchronous movement of the cutting wheels ensures uniform force in the circumferential direction, and the cutting edge flatness error can be controlled within 0.3 mm, meeting the high-precision connection requirements.

[0029] 3. The application is equipped with a clamping mechanism, which adopts a bidirectional clamping mode of "inner clamping plate + outer clamping plate". The inner clamping plate provides radial support by adhering to the inner wall of the pipe, and the outer clamping plate synchronously tightens the outer wall of the pipe, which, together with the bottom support of the liftable placement block, realizes three-dimensional fixation during pipe cutting, effectively avoids pipe radial deformation and axial deviation caused by cutting stress, and the deformation amount is controlled within 0.5 mm.

[0030] 4. The application adopts a bevel gear switching design of the driving mechanism, so that a single second motor can complete the step-by-step control of the inner and outer clamping. The control mechanism can real-time feedback the pipe wall thickness through the sliding resistor, automatically adjust the heating piece power to control the deformation degree of the hot deformation block, realize the dynamic matching of the cutting depth, and realize the whole process automation from pipe placement to cutting completion, shorten the cutting time of a single pipe, and reduce the operation difficulty without manual calibration.

[0031] 5. The application realizes the cooperation of control cylinder height adjustment and cutting wheel feeding action through the cooperation of spline shaft and first screw rod. The hydraulic oil transmission ensures the synchronicity of multiple cutting wheels, and the hot deformation block adopts shape memory alloy material with fast deformation response speed and accurate reset, excellent stability. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a schematic diagram of the three-dimensional structure of the application;

[0033] Figure 2 is a schematic diagram of the cross-sectional structure of the application;

[0034] Figure 3 is Figure 2 the enlarged view of A in

[0035] Figure 4 is a sectional view structure schematic diagram at the control cylinder in the present application;

[0036] Figure 5 is Figure 4 is an enlarged view at B in the present application;

[0037] Figure 6 is a partial structure schematic diagram at the wide gear in the present application.

[0038] in the figure:

[0039] 1, processing seat; 11, liftable placing block; 12, U-shaped mounting plate; 13, fixed block; 14, control cylinder; 15, cutting wheel;

[0040] 2, cutting feeding mechanism; 21, spline shaft; 22, first screw rod; 23, piston plate; 24, infusion frame; 25, hollow cylinder; 26, first feeding block; 27, push rod; 28, side groove; 29, second feeding block; 210, thermal deformation block; 211, heating sheet;

[0041] 3, fixed rod; 31, U-shaped block;

[0042] 4, guide wheel; 41, winding rope;

[0043] 5, tooth ring; 51, driving gear;

[0044] 6, clamping mechanism; 61, second screw rod; 62, lifting block; 63, second hinged seat; 64, inner clamping plate; 65, third hinged seat; 66, connecting rod; 67, worm; 68, rotating rod; 69, worm gear; 610, narrow gear; 611, guide rail; 612, third screw rod; 613, wide gear; 614, moving plate; 615, outer clamping plate;

[0045] 7, driving mechanism; 71, electric telescopic rod; 72, connecting block; 73, second motor; 74, driving bevel gear; 75, upper bevel gear; 76, lower bevel gear;

[0046] 8, control mechanism; 81, resistance rod; 82, sliding sheet. DETAILED DESCRIPTION

[0047] The following examples are for illustrative purposes only and are not intended to limit the scope of the present application. Example: refer to Figures 1 to 6 A MPP cable protection pipe cutting device, comprising:

[0048] The machining seat 1 is provided with a liftable placing block 11, and the upper end of the machining seat 1 is fixedly connected with a U-shaped mounting plate 12. The lower position of the U-shaped mounting plate 12 is fixedly connected with a fixed block 13 through two first supporting rods. The lower position of the fixed block 13 is provided with a control cylinder 14, and the circumferential side of the control cylinder 14 is provided with a plurality of circumferentially arrayed cutting wheels 15.

[0049] The plurality of groups of cutting wheels 15 are circumferentially symmetrically distributed, can synchronously expand and cut outward from the inner wall of the pipeline, replace the traditional top-down single-blade cutting mode, avoid cutting failure caused by pipe size difference, and reduce the pipe tearing problem caused by the too long single-blade cutting path through synchronous movement, so that the incision flatness error is less than 0.3 mm.

[0050] The cutting feeding mechanism 2 is used for moving the cutting wheel 15 to be in close contact with the inner wall of the pipeline, and then moving the cutting wheel 15 by a distance equal to the thickness of the pipeline. The cutting feeding mechanism 2 comprises a spline shaft 21 rotatably connected to the lower end of the fixed block 13. A first screw rod 22 is rotatably connected to the inner top wall of the control cylinder 14. The first screw rod 22 is penetrated by the spline shaft 21, and a spline groove matched with the spline shaft 21 is formed at the position penetrated by the first screw rod 22. A piston plate 23 is sealingly and vertically slidably connected in the control cylinder 14, and the piston plate 23 is sealingly and threadedly connected with the first screw rod 22. A transfusion frame 24 is sealingly and rotatably connected to the circumferential wall of the control cylinder 14. A hollow cylinder 25 is fixedly connected to the circumferential wall of the transfusion frame 24. The hollow cylinder 25, the transfusion frame 24 and the control cylinder 14 are in communication with each other. A first feeding block 26 is sealingly and slidably connected in the hollow cylinder 25. A push rod 27 is fixedly connected to the side of the first feeding block 26 away from the control cylinder 14. A side groove 28 is formed in the push rod 27. A second feeding block 29 is slidably connected in the side groove 28. A thermal deformation block 210 is arranged between the second feeding block 29 and the inner wall of the side groove 28. A heating sheet 211 is fixedly connected to the inner wall of the side groove 28 and in contact with the thermal deformation block 210. The first feeding block 26 and the second feeding block 29 jointly act on the position adjustment of the cutting wheel 15.

[0051] Specifically, the thermal deformation block 210 can be made of shape memory alloy. The thermal deformation block 210 expands to different degrees due to the heating degree of the heating sheet 211, and can automatically shrink to the initial size after the temperature returns to normal. The side wall of the thermal deformation block 210 close to the second feeding block 29 is fixedly connected with the second feeding block 29, and the side close to the heating sheet 211 is fixedly connected with the inner wall of the side groove 28, so that the thermal deformation block 210 can return to the initial position after shrinking and drive the second feeding block 29 to return to the initial position.

[0052] Specifically, the thermal deformation block 210 can be forcibly cooled by an external cooling device to avoid incomplete resetting due to residual heat during continuous cutting (such as mass production), resulting in cutting depth errors in the next cutting. The external cooling device is a common prior art and therefore will not be described in detail.

[0053] When the first screw rod 22 rotates, the piston plate 23 moves in the vertical direction, which can change the pressure of the hydraulic oil in the control cylinder 14 to provide power for the initial feeding of the cutting wheel 15. The hydraulic oil pressure generated by the movement of the piston plate 23 is transmitted to the hollow cylinder 25 through the liquid delivery frame 24, which pushes the first feeding block 26 to move outward, realizing the approach of the cutting wheel 15 to the inner wall of the pipeline until it is attached to the inner wall. This process corresponds to the detection result of the diameter of the pipeline inner wall, and completes the adjustment of the initial cutting position. Since the thermal deformation block 210 is made of shape memory alloy, its deformation degree changes with the power of the heating sheet 211, which can drive the second feeding block 29 to move further outward, and the moving distance matches the wall thickness of the pipeline, realizing precise control of the cutting depth. Through the two-step adjustment of "initial attachment to the inner wall + secondary matching of wall thickness", the problem of self-adaptive adjustment of cutting range according to the diameter and wall thickness of the pipeline in the traditional device is solved, greatly improving the application range.

[0054] Specifically, the second feeding block 29 is fixedly connected with a fixed rod 3 extending to the outside of the side groove 28 on the side away from the control cylinder 14. One end of the fixed rod 3 is fixedly connected with a U-shaped block 31. The cutting wheel 15 is rotationally connected between the upper and lower walls of the U-shaped block 31, and the upper end of the U-shaped block 31 is fixedly connected with a first motor for driving the cutting wheel 15. The U-shaped block 31 provides a mounting base for the cutting wheel 15, and the first motor directly drives the cutting wheel 15 to rotate, ensuring stable cutting power.

[0055] Specifically, a space between the piston plate 23 below the control cylinder 14, the liquid delivery frame 24 and the hollow cylinder 25 forms a liquid storage space, and the liquid storage space is filled with hydraulic oil. The hydraulic oil serves as a pressure transmission medium to ensure that the power of the piston plate 23 can be transmitted to all first feeding blocks 26 synchronously, realizing synchronous expansion of multiple cutting wheels 15 and ensuring cutting consistency.

[0056] Specifically, the lower end of the fixed block 13 is fixedly connected with an electric hoist, and the upper end of the control cylinder 14 is hingedly connected with a guide wheel 4 through a first hinge seat. The electric hoist and the guide wheel 4 are sleeved with a winding rope 41. The electric hoist is used to adjust the height of the control cylinder 14 and the cutting wheel 15. By winding or releasing the winding rope 41, the cutting position of the cutting wheel 15 in the axial direction of the pipeline can be flexibly adjusted to meet the cutting needs of pipelines of different lengths.

[0057] Specifically, the upper end of the infusion frame 24 is fixedly connected with a gear ring 5, the outer wall of the control cylinder 14 is fixedly connected with a mounting block, the lower end of the mounting block is fixedly connected with a micro motor, the output end of the micro motor is fixedly connected with a drive gear 51 which is meshed with the gear ring 5, the micro motor drives the drive gear 51 to rotate, the infusion frame 24, the hollow cylinder 25 and the cutting wheel 15 are driven by the gear ring 5 to rotate as a whole around the axis of the control cylinder 14, the cutting wheel 15 realizes the ring cutting action on the pipeline, and the synchronous cutting of multiple groups of cutting wheels further ensures the flatness of the incision.

[0058] A clamping mechanism 6 is arranged above the fixed block 13 and is used for clamping and fixing the inner wall and the outer wall of the pipeline, which not only avoids the deformation of the pipeline during cutting, but also feeds back the diameters of the inner wall and the outer wall of the pipeline through the clamping position, thereby providing a basis for the adjustment of the cutting feeding mechanism 2. The clamping mechanism 6 comprises a second screw rod 61 which is rotationally connected to the upper end of the fixed block 13, a lifting block 62 which is threadedly connected to the second screw rod 61, two groups of second hinge seats 63 which are symmetrically arranged on the lower end of the lifting block 62 and the upper end of the fixed block 13, an inner clamping plate 64 which is arranged between each group of second hinge seats 63, two third hinge seats 65 which are arranged on the side of the inner clamping plate 64 close to the second screw rod 61, a connecting rod 66 which is arranged between each third hinge seat 65 and the corresponding second hinge seat 63, a worm 67 which is coaxially rotationally connected to the upper end of the second screw rod 61, a U-shaped mounting plate 12 which is fixedly connected to the top end of the worm 67, a rotating rod 68 which is rotationally connected to the lower end of the U-shaped mounting plate 12 through two support rods, a worm wheel 69 which is fixedly connected to the central position of the rotating rod 68 and cooperates with the worm 67, a narrow gear 610 which is arranged on each side of the rotating rod 68, a guide rail 611 which is fixedly connected to each inner clamping plate 64 through an L-shaped rod, a third screw rod 612 which is rotationally connected in the guide rail 611, a wide gear 613 which is fixedly connected to the part of the third screw rod 612 extending out of the guide rail 611 and is meshed with the narrow gear 610, a moving plate 614 which is threadedly connected to the third screw rod 612 and is slidingly connected to the inner wall of the guide rail 611 in the horizontal direction, and an outer clamping plate 615 which is fixedly connected to the lower end of the moving plate 614. A driving mechanism 7 is arranged on the lower end of the U-shaped mounting plate 12 and is used for selectively driving the second screw rod 61 and the worm 67.

[0059] When the second screw rod 61 rotates, the lifting block 62 moves up and down, the inner clamping plate 64 is driven by the connecting rod 66 to open or shrink until it is attached to the inner wall of the pipeline, thereby realizing the clamping of the inner wall and directly reflecting the diameter of the inner wall of the pipeline through the opening amplitude of the inner clamping plate 64; when the worm 67 rotates, the worm wheel 69 and the rotating rod 68 are driven to rotate, the third screw rod 612 is driven to rotate through the meshing of the narrow gear 610 and the wide gear 613, the outer clamping plate 615 is driven by the moving plate 614 to approach or move away from the outer wall of the pipeline, thereby realizing the clamping of the outer wall, and the spacing between the outer clamping plate 615 and the inner clamping plate 64 reflects the thickness of the pipeline wall.

[0060] The driving mechanism 7 comprises an electric telescopic rod 71 fixedly connected to the lower end of the U-shaped mounting plate 12, a connecting block 72 fixedly connected to the output end of the electric telescopic rod 71, a second motor 73 fixedly connected to one side wall of the connecting block 72, a driving bevel gear 74 rotatably connected to the other side wall of the connecting block 72 and driven by the second motor 73, an upper bevel gear 75 and a lower bevel gear 76 fixedly connected to the second lead screw 61 and the worm 67 respectively, and the driving bevel gear 74 selectively meshes with the upper bevel gear 75 and the lower bevel gear 76.

[0061] The position of the driving bevel gear 74 is adjusted by the electric telescopic rod 71, so that one second motor 73 can selectively drive the second lead screw 61 (control the inner clamping plate 64) or the worm 67 (control the outer clamping plate 615), without the need for an additional driving source, thereby saving equipment cost.

[0062] The control mechanism 8 is further arranged between the clamping mechanism 6 and the cutting and feeding mechanism 2, and is used to automatically control the cutting initial position and cutting distance of the cutting wheel 15 according to the position of the inner clamping plate 64 and the relative distance between the inner clamping plate 64 and the outer clamping plate 615. The control mechanism 8 comprises a support block fixedly connected to the upper end of the guide rail 611, an electric resistance rod 81 fixedly connected to the support block, a sliding sheet 82 slidably connected to the electric resistance rod 81 and fixedly connected to the moving plate 614, a sliding rheostat formed between the electric resistance rod 81 and the sliding sheet 82, and the sliding rheostat is electrically connected with the heating sheet 211, and the second lead screw 61 is coaxially fixedly connected with the spline shaft 21.

[0063] When the moving plate 614 moves, the sliding sheet 82 is driven to slide along the electric resistance rod 81, the resistance value of the sliding rheostat is changed, and then the power of the heating sheet 211 is adjusted, so that the deformation degree of the thermal deformation block 210 matches the pipe wall thickness (the distance between the inner clamping plate 64 and the outer clamping plate 615), and the moving distance of the second feeding block 29 is accurately controlled; the second lead screw 61 is coaxially fixedly connected with the spline shaft 21, so as to ensure that the opening action of the inner clamping plate 64 is synchronized with the initial feeding of the first feeding block 26, so that the initial position of the cutting wheel 15 is always matched with the inner wall, and the automatic matching of the cutting initial position is realized.

[0064] A method for cutting the MPP cable protection pipe by using the above cutting device, comprising the following steps:

[0065] S1, pipe placement: place the pipe on the liftable placing block 11 of the machining seat 1, then drive the third lead screw arranged additionally to rotate by the driving motor, so that the liftable placing block 11 can perform lifting movement, when the pipe is not placed, the liftable placing block 11 is in the position below the machining seat 1, so as to ensure that the pipe can be placed, after the pipe is placed and the liftable placing block 11 is moved upward to reset, the upper end of the pipe is between the inner clamping plate 64 and the outer clamping plate 615, so as to ensure the operation of the subsequent clamping mechanism 6;

[0066] S2, pipe fixing: first make the electric telescopic rod 71 in the extended state, open the second motor 73, at this time drive bevel gear 74 and the lower bevel gear 76 meshing, drive the second lead screw 61 rotation, make the lifting block 62 along the second lead screw 61 displacement, the inner clamping plate 64 between the lifting block 62 and fixed block 13 expand, until the inner wall of the pipe is contacted, then make the electric telescopic rod 71 in the shrinkage state, drive bevel gear 74 and the upper bevel gear 75 meshing, drive the worm 67 rotation, make the narrow gear 610 through the wide gear 613 drive the third lead screw 612 rotation, through the moving plate 614 drive the outer clamping plate 615 in, until the outer wall of the pipe is contacted, realize the clamping and fixing of the inner and outer wall of the pipe, and the lower end of the pipe is fixed through the inner telescopic ring and the outer telescopic ring arranged by the liftable placing block 11, realize the stability of the end during the pipe cutting process, clamp the inner and outer wall, which can avoid the deformation of the pipe during the cutting process;

[0067] S3, cutting position adjustment: the height position of the control cylinder 14 on the spline shaft 21 can be adjusted by the electric hoist, so as to adjust the cutting position of the cutting wheel 15 on the pipe;

[0068] S4, pipe cutting: during the rotation of the second lead screw 61, the first lead screw 22 can be driven to rotate by the spline shaft 21, so that the piston plate 23 moves vertically in the control cylinder 14, the hydraulic oil in the control cylinder 14 is delivered to the hollow cylinder 25 through the liquid delivery frame 24, the position of the first feeding block 26 in the hollow cylinder 25 is adjusted, so that the position of the cutting wheel 15 controlled by the first feeding block 26 always matches the inner clamping plate 64, during the rotation of the third lead screw 612, the movement of the moving plate 614 can drive the sliding sheet 82 to move on the resistance rod 81, so as to adjust the power of the heating sheet 211, so that the heating degree of the heating sheet 211 on the thermal deformation block 210 corresponds to the position of the outer clamping plate 615, so that the expansion degree of the thermal deformation block 210 can be adjusted according to the distance between the inner clamping plate 64 and the outer clamping plate 615, so that the cutting depth of the cutting wheel 15 controlled by the second feeding block 29 matches the distance between the inner clamping plate 64 and the outer clamping plate 615, so as to ensure that the cutting range is always just right, improve the application range, after the double feeding of the cutting wheel 15 is completed, the driving gear 51 is driven to rotate by the micro motor, so that the liquid delivery frame 24 and the cutting wheel 15 are driven to rotate synchronously by the gear ring 5, realizing the overall cutting of the pipe.

[0069] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A cutting device for MPP cable protection pipes, characterized in that, Include: Processing seat (1), the processing seat (1) is provided with a liftable placing block (11), the upper end of the processing seat (1) is fixedly connected with a U-shaped mounting plate (12), the lower position of the U-shaped mounting plate (12) is fixedly connected with a fixed block (13) through two first supporting rods, the lower position of the fixed block (13) is provided with a control cylinder (14), the circumferential side of the control cylinder (14) is provided with a plurality of circumferentially arrayed cutting wheels (15); Cutting feeding mechanism (2) is used for moving the cutting wheel (15) to the inner wall of the pipeline first, then moving the cutting wheel (15) to the same distance as the thickness of the pipeline, the cutting feeding mechanism (2) includes a spline shaft (21) rotatably connected to the lower end of the fixed block (13), a first screw rod (22) is rotatably connected to the inner top wall of the control cylinder (14), the first screw rod (22) is penetrated by the spline shaft (21), and a spline groove is formed at the position penetrated by the first screw rod (22) for cooperation with the spline shaft (21), the inside of the control cylinder (14) is sealingly and vertically slidably connected with a piston plate (23), and the piston plate (23) is sealingly and threadedly connected with the first screw rod (22), the circumferential wall of the control cylinder (14) is sealingly and rotatably connected with a transfusion frame (24), the circumferential wall of the transfusion frame (24) is fixedly connected with a hollow cylinder (25), the hollow cylinder (25), the transfusion frame (24) and the control cylinder (14) are in communication with each other, the first feeding block (26) is sealingly and slidably connected in the hollow cylinder (25), the first feeding block (26) is fixedly connected with a push rod (27) away from the control cylinder (14), a side groove (28) is formed in the push rod (27), the second feeding block (29) is slidably connected in the side groove (28), the heat deformation block (210) is arranged between the second feeding block (29) and the inner wall of the side groove (28), the heating sheet (211) is fixedly connected to the inner wall of the side groove (28) and in contact with the heat deformation block (210), the first feeding block (26) and the second feeding block (29) jointly act on the position adjustment of the cutting wheel (15).

2. The MPP cable protection pipe cutting device according to claim 1, characterized in that, The second feeding block (29) is fixedly connected with a fixed rod (3) extending out of the side groove (28) away from the control cylinder (14), one end of the fixed rod (3) is fixedly connected with a U-shaped block (31), the cutting wheel (15) is rotatably connected between the upper and lower walls of the U-shaped block (31), and the upper end of the U-shaped block (31) is fixedly connected with a first motor for driving the cutting wheel (15).

3. A MPP cable protection pipe cutting device according to claim 2, characterised in that, The space below the piston plate (23) in the control cylinder (14), the transfusion frame (24) and the hollow cylinder (25) form a liquid storage space, and the liquid storage space is filled with hydraulic oil.

4. A MPP cable protection pipe cutting device according to claim 3, characterised in that, The lower end of the fixed block (13) is fixedly connected with an electric hoist, the upper end of the control cylinder (14) is hingedly connected with a guide wheel (4) through a first hinge seat, the electric hoist and the guide wheel (4) are sleeved with a winding rope (41), and the electric hoist is used for adjusting the height of the control cylinder (14) and the cutting wheel (15).

5. The MPP cable protection pipe cutting device according to claim 4, characterized in that, The upper end of the infusion frame (24) is fixedly connected with a gear ring (5), the outer wall of the control cylinder (14) is fixedly connected with a mounting block, the lower end of the mounting block is fixedly connected with a micro motor, and the output end of the micro motor is fixedly connected with a driving gear (51) which is in mesh with the gear ring (5).

6. The MPP cable protection pipe cutting device according to claim 5, characterized in that, The upper end of the infusion frame (24) is fixedly connected with a gear ring (5), the outer wall of the control cylinder (14) is fixedly connected with a mounting block, the lower end of the mounting block is fixedly connected with a micro motor, and the output end of the micro motor is fixedly connected with a driving gear (51) which is in mesh with the gear ring (5).

7. A MPP cable protection pipe cutting device according to claim 6, characterised in that, The upper end of the infusion frame (24) is fixedly connected with a gear ring (5), the outer wall of the control cylinder (14) is fixedly connected with a mounting block, the lower end of the mounting block is fixedly connected with a micro motor, and the output end of the micro motor is fixedly connected with a driving gear (51) which is in mesh with the gear ring (5). The upper end of the infusion frame (24) is fixedly connected with a gear ring (5), the outer wall of the control cylinder (14) is fixedly connected with a mounting block, the lower end of the mounting block is fixedly connected with a micro motor, and the output end of the micro motor is fixedly connected with a driving gear (51) which is in mesh with the gear ring (5). The driving mechanism (7) comprises an electric telescopic rod (71) fixedly connected to the lower end of the U-shaped mounting plate (12), a connecting block (72) is fixedly connected to the output end of the electric telescopic rod (71), a second motor (73) is fixedly connected to one side wall of the connecting block (72), a driving bevel gear (74) driven by the second motor (73) is rotatably connected to the other side wall of the connecting block (72), an upper bevel gear (75) and a lower bevel gear (76) are fixedly connected to the second screw rod (61) and the worm (67) respectively, and the driving bevel gear (74) is selectively meshed with the upper bevel gear (75) and the lower bevel gear (76).

8. The MPP cable protection pipe cutting device according to claim 7, characterized in that, The control mechanism (8) is arranged between the clamping mechanism (6) and the cutting feeding mechanism (2), and is used for automatically controlling the cutting initial position and the cutting distance of the cutting wheel (15) according to the position of the inner clamping plate (64) and the relative distance between the inner clamping plate (64) and the outer clamping plate (615), the control mechanism (8) comprises a support block fixedly connected to the upper end of the guide rail (611), an electric resistance rod (81) is fixedly connected to the support block, a sliding sheet (82) is slidably connected to the electric resistance rod (81), the sliding sheet (82) is fixedly connected with the moving plate (614), a sliding rheostat is formed between the electric resistance rod (81) and the sliding sheet (82), the sliding rheostat is electrically connected with the heating sheet (211), and the second lead screw (61) is coaxially fixedly connected with the spline shaft (21).

9. A method of cutting a MPP cable protection pipe using the cutting device according to any one of claims 1-8, characterized in that, The method comprises the following steps: S1, pipeline placement: place the pipeline on the liftable placement block (11) of the machining seat (1), after the pipeline placement is completed and the liftable placement block (11) is moved and reset, the upper end of the pipeline is between the inner clamping plate (64) and the outer clamping plate (615), so that the operation of the subsequent clamping mechanism (6) is ensured; S2, pipeline fixing: first, make the electric telescopic rod (71) in the extended state, start the second motor (73), at this time, drive the bevel gear (74) to mesh with the lower bevel gear (76), so that the inner clamping plate (64) between the lifting block (62) and the fixed block (13) expands outward until it contacts the inner wall of the pipeline, then make the electric telescopic rod (71) in the retracted state, drive the bevel gear (74) to mesh with the upper bevel gear (75), drive the outer clamping plate (615) to move inward through the moving plate (614) until it contacts the outer wall of the pipeline, so as to clamp and fix the inner and outer walls of the pipeline, and avoid deformation of the pipeline during cutting; S3, cutting position adjustment: the height position of the control cylinder (14) on the spline shaft (21) can be adjusted through the electric hoist, so as to adjust the cutting position of the cutting wheel (15) on the pipeline; S4, pipeline cutting: the first lead screw (22) is driven to rotate by the spline shaft (21) through the second lead screw (61), the hydraulic oil in the control cylinder (14) is delivered into the hollow cylinder (25) through the liquid delivery frame (24), the position of the first feeding block (26) in the hollow cylinder (25) is adjusted, so that the position of the cutting wheel (15) controlled by the first feeding block (26) always matches the inner clamping plate (64), the moving plate (614) moves to drive the sliding sheet (82) to move on the electric resistance rod (81), the power of the heating sheet (211) is adjusted, so that the cutting depth of the cutting wheel (15) controlled by the second feeding block (29) matches the distance between the inner clamping plate (64) and the outer clamping plate (615), the cutting range is always just right, and the application range is improved.

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