A cutting device and a cutting method for a high-voltage cable metal sheath

Abstract

This invention discloses a cutting device and method for cutting the metal sheath of high-voltage cables. The device includes a cutting mechanism, a control device, a traveling mechanism, a rotating mechanism, and a ranging mechanism. The cutting mechanism includes an axial cutting mechanism and a radial cutting mechanism symmetrically arranged on opposite sides of the rotating mechanism, used for cutting the metal sheath of the high-voltage cable axially and radially, respectively. The ranging mechanism is located on the side of the rotating mechanism closest to the cutting mechanism and is used to scan the external dimensions of the metal sheath of the high-voltage cable. The control device controls the feed rate of the cutting mechanism based on the external dimension data obtained by the ranging mechanism. The cutting device and method for cutting the metal sheath of high-voltage cables provided by this invention can flexibly control the axial and longitudinal cutting depths for metal sheaths of different sizes, improving the efficiency and quality of cable termination and joint installation.

Description

Technical Field

[0001] This invention belongs to the field of power cable accessory cutting technology, and particularly relates to a cutting device and method for cutting the metal sheath of high-voltage cables. Background Technology

[0002] With rapid societal development and accelerating urbanization, the market demand for high-voltage cables, a crucial component of urban power grids, has surged. Cable accessories, a vital part of power cables, connect cables to transmission and distribution lines and related equipment, forming the power transmission network together with the cables. They primarily include cable terminals and joints, critical links in cable lines. The fabrication and installation of cable terminals and joints involve a massive amount of work; however, the cutting of the cable's metal sheath still relies on manual inspection combined with installation dimension verification. This presents significant challenges, including low efficiency in on-site detection of process defects and low standardization and consistency in quality evaluation. These issues hinder the effective implementation of quality control in the fabrication and installation of high-voltage cable terminals and joints, and ultimately impede further improvements in the inherent safety level of high-voltage cable equipment during electrical construction and project acceptance.

[0003] Traditionally, to improve the installation of cable terminals and joints, a combination of axial cutting with a grinder and radial cutting with a crescent blade is used to cut the cable's metal sheath. This method relies solely on manual inspection, making it difficult to guarantee the cutting depth and easily damaging the inner shielding layer of high-voltage cables. To ensure the quality of cable metal sheath cutting and avoid damage to the cable shielding layer, a cutting device and method for high-voltage cable metal sheaths are needed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a cutting device and method for cutting the metal sheath of high-voltage cables. This method can flexibly control the axial and longitudinal cutting depths for metal sheaths of different sizes, thereby improving the efficiency and quality of cable terminal and joint installation.

[0005] The present invention adopts the following technical solution.

[0006] In a first aspect, the present invention provides a cutting device for the metal sheath of a high-voltage cable, comprising: a cutting mechanism and a control device. The cutting device further comprises: a traveling mechanism, a rotating mechanism, and a ranging mechanism. One side of the rotating mechanism is connected to the cutting mechanism. A first through hole for the metal sheath of the high-voltage cable to pass through is provided at the center of the rotating mechanism. The rotating mechanism is used to drive the cutting mechanism to rotate on the surface of the metal sheath of the high-voltage cable. The cutting mechanism comprises: an axial cutting mechanism and a radial cutting mechanism symmetrically arranged on opposite sides of the rotating mechanism, respectively used to cut the metal sheath of the high-voltage cable along the axial and radial directions. The traveling mechanism is arranged on the side of the rotating mechanism away from the cutting mechanism and is used to drive the cutting device to move on the metal sheath of the high-voltage cable. The ranging mechanism is arranged on the side of the rotating mechanism close to the cutting mechanism and is used to scan the external dimensions of the metal sheath of the high-voltage cable. The control device is connected to the rotating mechanism, the cutting mechanism, and the ranging mechanism and is used to control the feed amount of the cutting mechanism based on the external dimension data obtained by the ranging mechanism.

[0007] Preferably, the cutting device further includes a clamping mechanism; the clamping mechanism is disposed on the side of the rotating mechanism away from the cutting mechanism, for allowing the high-voltage cable metal sheath to pass through and clamping the high-voltage cable metal sheath.

[0008] Preferably, the clamping mechanism includes: a second fixed base plate, a second driving assembly, and a sliding claw assembly; both the second fixed base plate and the second driving assembly have a second through hole at their center for the metal sheath of the high-voltage cable to pass through; the second driving assembly is disposed on one side of the second fixed base plate; the second driving assembly has a plurality of sliding claw assemblies evenly spaced along the circumference of the second through hole; the clamping end of the sliding claw assembly extends into the interior of the second through hole; the second driving assembly is used to drive each sliding claw assembly to move radially along the second through hole to clamp the metal sheath of the high-voltage cable.

[0009] Preferably, the second driving assembly includes: a second spur gear mechanism, an assembly housing, a guide rail, and a fourth motor; one side of the second spur gear mechanism is rotatably connected to the second fixed base plate, and the other side is fixedly connected to the guide rail, for driving the guide rail to rotate; the guide rail is provided with a spiral groove; the fourth motor is disposed on the second fixed base plate and is used to drive the second spur gear mechanism to mesh and transmit; the assembly housing covers the outside of the guide rail and the second spur gear mechanism, its open end is fixedly connected to the second fixed base plate, and its other end is fixedly connected to the rotating mechanism, and is provided with a guide groove; the sliding pawl assembly is radially movable in the guide groove along the second through hole, and the sliding pawl of the sliding pawl assembly passes through the guide groove and engages with the spiral groove of the guide rail, moving radially along the second through hole when the guide rail rotates.

[0010] Preferably, the second spur gear mechanism includes: a first gear, a second gear, and a third gear; the second gear and the third gear are the same size, and the first gear is larger than the second gear and the third gear; the first gear, the second gear, and the third gear are all rotatably mounted on one side of the second fixed base plate and are sequentially connected by external meshing transmission; the first gear is rotatably connected to the second fixed base plate through an angular contact ball bearing, the inside of the first gear is connected to the outer ring of the angular contact ball bearing, and the inner ring of the angular contact ball bearing is connected and fixed to the second fixed base plate; the side of the first gear away from the second fixed base plate is fixedly connected to a guide rail.

[0011] Preferably, the walking mechanism is located on the side of the clamping mechanism away from the rotating mechanism, and includes: a fixed base, a drive wheel, an auxiliary wheel, and a second drive assembly; the fixed base is fixedly connected to the side of the clamping mechanism away from the rotating mechanism; the fixed base includes: a first frame and a second frame, and a gap is left between the first frame and the second frame for the metal sheath of the high-voltage cable to pass through; the drive wheel and the auxiliary wheel are both vertically installed between the first frame and the second frame, and a gap is left between the drive wheel and the auxiliary wheel for the metal sheath of the high-voltage cable to pass through; the second drive assembly is used to drive the drive wheel to move closer to the auxiliary wheel and drive the drive wheel to rotate.

[0012] Preferably, the second drive assembly includes: a fifth motor, a sixth motor, a first pair of guide rods, and a second pair of guide rods; the second pair of guide rods is disposed inside the second frame; a first fixing block is fixedly installed on one side of the second pair of guide rods, and a moving block is movably installed on the other side; the first pair of guide rods is disposed inside the first frame, and a helical rod is disposed inside the first pair of guide rods; a second fixing block is fixedly installed on the first pair of guide rods at the position corresponding to the first fixing block; the first pair of guide rods, the second pair of guide rods, and the helical rod are axially parallel; the fifth motor is disposed on one side of the first frame and coaxially connected to the helical rod; the sixth motor is sleeved on the helical rod and threadedly connected to the helical rod; one end of the drive wheel is coaxially connected to the output end of the sixth motor, and the other end is rotatably connected to the moving block; one end of the auxiliary wheel is rotatably connected to the first fixing block, and the other end is rotatably connected to the second fixing block.

[0013] Preferably, the surfaces of the drive wheel and the auxiliary wheel are made of composite rubber material and are sandblasted.

[0014] Preferably, the axial breaking mechanism includes: a housing, a first motor, a metal cutting blade, a second motor, a lifting mechanism, and a support structure; the support structure is disposed inside the housing and located on one side of the housing; the metal cutting blade is rotatably mounted on one side of the support structure, and the other side is fixedly connected to the lifting end of the lifting mechanism; the first motor is disposed on the top of the support structure, and the output end of the first motor is connected to the metal cutting blade through a bevel gear transmission mechanism; the fixed end of the lifting mechanism is fixedly connected to the rotating mechanism; the second motor is disposed on one side of the lifting mechanism and is used to drive the lifting end to achieve lifting.

[0015] Preferably, the side of the housing closest to the rotating mechanism is an open structure for connecting the lifting mechanism and the rotating mechanism; the side of the housing away from the rotating mechanism has a front cover detachably installed via a slot, and a spring latch for locking the front cover is provided on one side of the housing.

[0016] Preferably, the radial breaking mechanism and the axial breaking mechanism have the same structure and dimensions, the only difference being the orientation of the metal cutting blades; when the high-voltage cable metal sheath passes through the first through hole, the metal cutting blades of the axial breaking mechanism are parallel to the axial direction of the high-voltage cable metal sheath; the metal cutting blades of the radial breaking mechanism are parallel to the radial direction of the high-voltage cable metal sheath.

[0017] Preferably, the rotating mechanism includes: a first fixed base plate and a first driving assembly; both the first fixed base plate and the first driving assembly are provided with a first through hole at the center for the metal sheath of the high-voltage cable to pass through; one end of the first driving assembly is rotatably connected to the first fixed base plate, and the other end is fixedly connected to the rotating base plate, for driving the rotating base plate to rotate, and the rotating base plate is used to install the axial breaking mechanism, the radial breaking mechanism and the ranging mechanism.

[0018] Preferably, the first drive assembly includes: a first spur gear mechanism and a third motor; the first spur gear mechanism includes: a fourth gear, a fifth gear, and a sixth gear, the fifth gear and the sixth gear having the same size, and the fourth gear having a larger size than the fifth gear and the sixth gear; the fourth gear, the fifth gear, and the sixth gear are all rotatably mounted on one side of the first fixed base plate and are sequentially connected by external meshing transmission; the fourth gear is rotatably connected to the first fixed base plate through an angular contact ball bearing, the interior of the fourth gear is connected to the outer ring of the angular contact ball bearing, and the inner ring of the angular contact ball bearing is connected and fixed to the first fixed base plate; the third motor is disposed on one side of the first fixed base plate, and its output end is coaxially connected to the sixth gear.

[0019] Secondly, the present invention provides a method for cutting the metal sheath of a high-voltage cable, using the aforementioned high-voltage cable metal sheath cutting device, comprising the following steps:

[0020] The rotating mechanism is fitted onto the metal sheath of the high-voltage cable;

[0021] The ranging mechanism is activated to scan the axial and radial contours of the high-voltage cable's metal sheath and sends the obtained contour data to the control device.

[0022] Based on the contour data obtained by the ranging mechanism, the control device sets the axial cutting depth of the axial breaking mechanism and the longitudinal cutting depth of the longitudinal breaking mechanism.

[0023] The traveling mechanism, rotating mechanism, axial cutting mechanism, and longitudinal cutting mechanism are activated to sequentially cut the metal sheath of the high-voltage cable axially and longitudinally.

[0024] Compared with existing technologies, the advantages of this invention are as follows: This invention enables axial cutting of the metal sheath through a combination of an axial cutting mechanism and a traveling mechanism, and radial cutting of the metal sheath through a combination of a radial cutting mechanism and a rotating mechanism. By incorporating a ranging mechanism, the external dimensions of the high-voltage cable's metal sheath can be scanned. Based on the external dimension data obtained by the ranging mechanism, a control device sets the feed rates of the axial and radial cutting mechanisms. This allows for flexible control of the axial and longitudinal cutting depths for metal sheaths of different sizes, solving the problem of poor control over the cutting depth in traditional technologies, which can damage the inner shielding layer of high-voltage cables.

[0025] Furthermore, this invention also includes a clamping mechanism, which can firmly clamp the metal sheath of the high-voltage cable, thereby making the cutting more stable. Simultaneously, the clamping jaw size can be adjusted by the drive assembly, thus allowing for good fit with high-voltage cable metal sheaths of different sizes.

[0026] Furthermore, this invention, by incorporating a traveling mechanism in conjunction with a clamping mechanism, enables the cutting device to move across the surface of the corrugated pipe's metal sheath. Combined with a control device, this achieves fully automated operation of the cutting device. From clamping the high-voltage cable's metal sheath to scanning its shape data, and then controlling the traveling and cutting mechanisms to cut the metal sheath, this invention saves manpower while making the cutting operation more intelligent and precise, thus ensuring the effective cutting of the high-voltage cable's metal sheath. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the high-voltage cable metal sheath cutting device in this invention;

[0028] Figure 2 This is a schematic diagram of the axial breaking mechanism in this invention;

[0029] Figure 3 This is a schematic diagram of the connection between the first motor and the bevel gear transmission mechanism in this invention;

[0030] Figure 4 This is a schematic diagram of the connection between the second motor and the lifting structure in this invention;

[0031] Figure 5 This is a schematic diagram of the clamping mechanism in this invention;

[0032] Figure 6 This is a schematic diagram of the walking mechanism in this invention;

[0033] Figure 7 This is a schematic diagram of the structure of the metal sheath of a high-voltage cable after being cut using the cutting device of this invention.

[0034] Figure reference numerals:

[0035] 1. Walking mechanism; 101. Fifth motor; 102. Sixth motor; 103. Fixed base; 1031. First pair of guide rods; 1032. Moving block; 1033. Second pair of guide rods; 1034. Fixed block; 104. Drive wheel; 105. Auxiliary wheel;

[0036] 2. Rotating mechanism;

[0037] 3. Axial breaking mechanism; 301. Spring lock; 302. Housing; 303. First motor; 304. Metal cutting blade; 305. Second motor; 306. Lifting mechanism; 307. Support structure;

[0038] 4. Clamping mechanism; 401. Second fixed base plate; 402. Second spur gear mechanism; 403. Sliding claw assembly; 404. Assembly housing; 405. Guide rail; 406. Fourth motor;

[0039] 5. Distance measuring mechanism;

[0040] 6. Radial interruption mechanism;

[0041] 7. Metal sheath of high-voltage cable; 701. Radial cut; 702. Axial cut. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this invention. The embodiments described in this application are merely some embodiments of this invention, and not all embodiments. Based on the spirit of this invention, other embodiments obtained by those skilled in the art without creative effort are all within the protection scope of this invention.

[0043] The metal sheath of high-voltage cables is the metal sheath of cables of 110kV and above. The metal sheath is made of aluminum alloy and is located between the outer sheath layer and the water-blocking layer. The metal sheath can prevent the cable from being damaged by the external environment, and also has the functions of electromagnetic interference protection, fire protection and explosion protection.

[0044] The cable insulation shielding layer is the insulation shielding layer for 110kV and above cables. The insulation shielding layer is made of semi-conductive material and is located between the cable water-blocking layer and the insulation layer. The insulation shielding layer can symmetrically control the field strength, smooth the voltage intensity, and prevent damage to the cable caused by corona discharge.

[0045] like Figure 1 As shown, Embodiment 1 of the present invention provides a cutting device for the metal sheath of a high-voltage cable, comprising: a control device, a traveling mechanism 1, a rotating mechanism 2, a cutting mechanism, a clamping mechanism 4, and a ranging mechanism 5.

[0046] The control device is an external component. It is connected to the walking mechanism 1, rotating mechanism 2, breaking mechanism, clamping mechanism 4, and ranging mechanism 5. The PLC controls the clamping mechanism 4 to clamp the high-voltage cable metal sheath 7 based on the shape data of the high-voltage cable metal sheath 7 measured by the ranging mechanism 5. Based on the shape dimension data obtained by the ranging mechanism 5, the PLC controls the feed amount of the breaking mechanism and controls the breaking mechanism, rotating mechanism 2, and walking mechanism 1 to break the metal sheath according to the edited trajectory.

[0047] like Figure 2 As shown, the breaking mechanism includes an axial breaking mechanism 3 and a radial breaking mechanism 6. The axial breaking mechanism 3 and the radial breaking mechanism 6 are symmetrically arranged on both sides of the rotating mechanism 2, and are positioned on either side of the high-voltage cable's metal sheath during operation. The only difference between the axial breaking mechanism 3 and the radial breaking mechanism 6 is the orientation of the metal cutting blade 304. When the cutting direction of the metal cutting blade 304 is the same as the axial direction of the metal sheath, it is an axial breaking mechanism; when the cutting direction of the metal cutting blade 304 is the same as the radial direction of the metal sheath, it is a radial breaking mechanism.

[0048] Taking the axial breaking mechanism 3 as an example, it includes: spring lock 301, housing 302, first motor 303, metal cutting blade 304, second motor 305, lifting mechanism 306 and support structure 307.

[0049] The outer casing 302 consists of a top cover, a left side plate, a right side plate, a front cover, and a bottom plate, which surround the internal structural components of the switching assembly. It serves to protect the switching assembly and also safeguards the safety of the operators.

[0050] The rear of the outer casing 302 is an open structure, and the front cover is detachably inserted into the front of the outer casing 302 from top to bottom. The top of the outer casing 302 is provided with a spring lock 301 for locking the front cover. When the cutting device is working, the front cover is locked by the spring lock 301 to prevent the saw blade or cutting disc from breaking and flying out and injuring people; when it is necessary to replace the saw blade or cutting disc, the spring lock 301 is released, and the front cover can be pulled out from the top to perform the saw blade or cutting disc replacement operation.

[0051] Combination Figure 2 , Figure 3 As shown, the support structure 307 is disposed inside the housing 302 and at the bottom of the housing 302. A first drive shaft is rotatably mounted on one side of the support structure 307, one end of which extends to the outside of the support structure 307 and is fitted with a metal cutting blade 304; a second drive shaft is rotatably mounted on the top of the support structure 307, the second drive shaft being perpendicular to the axis of the first drive shaft and connected by a bevel gear transmission mechanism.

[0052] In a preferred but non-limiting embodiment of the present invention, each plate of the support structure 307 adopts a clearance design to reduce the weight of the parts and to support the entire breaking assembly.

[0053] The first motor 303 is fixedly installed inside the housing 302 and located on top of the support structure 307. The output end of the first motor 303 is coaxially connected to the second drive shaft, and is used to drive the first drive shaft and the metal cutting blade 304 to rotate through the second drive shaft and bevel gear transmission to cut the metal sleeve. The first motor 303 is preferably a DC motor, which has the advantages of a wide speed range, high starting speed, wide speed adjustment range, and stable speed. The bevel gear transmission has the advantages of high transmission efficiency and compact structure. By fixing the height, the metal sleeve is completely cut off, making it convenient to remove the metal sleeve after cutting.

[0054] Combination Figure 4 As shown, the second motor 305 is disposed inside the housing 302. A lifting mechanism 306 is fixedly installed at the output end of the second motor 305. The lifting mechanism 306 passes through the rear opening of the housing 302 and is fixedly connected to the rotating mechanism 2. The lifting mechanism 306 contains a screw and a screw sleeve, with the screw sleeve threadedly connected to the screw. The screw is coaxially connected to the output end of the second motor 305, and the screw sleeve is fixedly connected to the side of the support structure 307 away from the metal cutting blade 304. The second motor 305 drives the screw to rotate, forming a linear guide mechanism that drives the screw sleeve, support structure 3, and metal cutting blade 304 to achieve lifting and lowering. This mechanism features high precision, high rigidity, long lifespan, and low noise. The second motor 305 is preferably a stepper motor.

[0055] When the cutting device is inserted into the high-voltage cable, the stepper motor controls the cutting component to rise to the highest point. When cutting the metal sleeve, the cutting component is controlled to move up and down along the cutting point of the metal sleeve, thereby controlling the cutting depth.

[0056] Furthermore, a ranging mechanism 5 is provided on the bisecting surface between the radial breaking mechanism and the axial breaking mechanism. It is preferably, but not limited to, a laser ranging sensor. The ranging mechanism 5 is fixedly installed on the rotating base plate of the rotating mechanism 2. The laser ranging sensor pre-scans the outer dimensions of the metal sheath and controls the tool feed rate through the scan data to ensure that the feed rate does not exceed 2 / 3 of the thickness of the metal sheath.

[0057] like Figure 1 As shown, the rotating mechanism 2 includes: a third motor, a first fixed base plate, a first gear mechanism, and a first rotating base plate.

[0058] A first through hole for a metal sheath to pass through is provided at the center of the first fixed base plate. The first fixed base plate is preferably, but not limited to, annular. A first spur gear mechanism is provided on one side of the first fixed base plate. A third motor 201 is provided on the other side of the fixed base plate, and its output end is connected to the first spur gear mechanism for transmission.

[0059] The first spur gear mechanism includes a fourth gear, a fifth gear, and a sixth gear. The fifth and sixth gears are the same size, while the fourth gear is larger than both the fifth and sixth gears. The fourth, fifth, and sixth gears are rotatably mounted on one side of the first fixed base plate and are sequentially connected by external meshing transmission. The fourth gear is rotatably connected to the first fixed base plate via an angular contact ball bearing. The interior of the fourth gear is connected to the outer ring of the angular contact ball bearing, and the inner ring of the angular contact ball bearing is fixedly connected to the first fixed base plate. A third motor is located on one side of the first fixed base plate, and its output end is coaxially connected to the sixth gear.

[0060] A rotating base plate is provided on the side of the first gear away from the first fixed base plate. The rotating base plate is fixedly connected to the lifting mechanisms of the axial cutting mechanism 3 and the radial cutting mechanism 6, as well as the ranging mechanism 5. The two lifting mechanisms are symmetrically arranged on both sides of the first rotating base plate. The first motor drives the first spur gear mechanism to rotate the first rotating mechanism and the cutting mechanism, so that the metal cutting blade can rotate along the central axis of the metal sheath while rotating on its own axis, so as to cut the outer surface of the metal sheath.

[0061] In a preferred but non-limiting embodiment of the present invention, the third gear is a stepper motor, which can adjust the rotation speed of the rotating mechanism 2 in a timely manner; it can precisely control the start and stop positions; and it adopts a spur gear transmission mechanism, which has high transmission efficiency (up to 98%), good transmission accuracy, strong load-bearing capacity, and can withstand high loads and impact loads.

[0062] like Figure 5As shown, the clamping mechanism 4 includes: a second fixed base plate 401, a second spur gear mechanism 402, a sliding claw assembly 403, an assembly housing 404, a guide rail 405, and a fourth motor 406.

[0063] The second fixed base plate 401 and the center of the second driving assembly are both provided with a second through hole for the high voltage cable metal sheath 7 to pass through. The second driving assembly is disposed on one side of the second fixed base plate 401. The second driving assembly is provided with a plurality of sliding claw assemblies 403 evenly spaced along the circumference of the second through hole. The clamping end of the sliding claw assembly 403 extends into the interior of the second through hole. The second driving assembly is used to drive each sliding claw assembly 403 to move radially along the second through hole to clamp the high voltage cable metal sheath 7.

[0064] The second drive assembly includes: a second spur gear mechanism 402, an assembly housing 404, a guide rail 405, and a fourth motor 406; one side of the second spur gear mechanism 402 is rotatably connected to the second fixed base plate 401, and the other side is fixedly connected to the guide rail 405, for driving the guide rail 405 to rotate; the guide rail 405 is provided with a spiral groove.

[0065] The component housing 404 is covered outside the guide slide rail 405 and the second spur gear mechanism 402. Its open end is fixedly connected to the second fixed base plate 401, and the other end is fixedly connected to the rotating mechanism 2, and is provided with a guide groove.

[0066] The sliding claw assembly 403 is radially movable in the guide groove along the second through hole, and the sliding claw of the sliding claw assembly 403 passes through the guide groove and is inserted into the spiral groove of the guide slide rail 405, and moves radially along the second through hole when the guide slide rail 405 rotates.

[0067] In a preferred but non-limiting embodiment of the present invention, three sliding claw assemblies 403 are evenly arranged at equal intervals along the circumference, and a clamping opening for clamping the metal sheath 7 of the high-voltage cable is formed between the clamping ends of the three sliding claw assemblies 403.

[0068] The second spur gear mechanism 402 includes a first gear, a second gear, and a third gear; the second gear and the third gear are the same size, and the first gear is larger than the second gear and the third gear; the first gear, the second gear, and the third gear are all rotatably mounted on one side of the second fixed base plate 401 and are sequentially connected by external meshing transmission; the first gear is rotatably connected to the second fixed base plate 401 through an angular contact ball bearing, the inside of the first gear is connected to the outer ring of the angular contact ball bearing, and the inner ring of the angular contact ball bearing is connected and fixed to the second fixed base plate 401; the side of the first gear away from the second fixed base plate 401 is fixedly connected to the guide rail 405.

[0069] The fourth motor 406 is mounted on the second fixed base plate 401, and its output end is coaxially connected to the third gear for driving the second spur gear mechanism 402 through meshing transmission. The fourth motor 406 is also preferably a stepper motor.

[0070] like Figure 6 As shown, the walking mechanism 1 includes: a fixed base 103, a drive wheel 104, an auxiliary wheel 105, and a second drive assembly.

[0071] The fixed base 103 is fixedly connected to the second fixed base plate 401 of the clamping mechanism 4. The fixed base 103 includes a first frame and a second frame, with a gap between the first frame and the second frame for the high-voltage cable metal sheath 7 to pass through. The drive wheel 104 and the auxiliary wheel 105 are both vertically mounted between the first frame and the second frame, with a gap between the drive wheel 104 and the auxiliary wheel 105 for the high-voltage cable metal sheath 7 to pass through; the second drive assembly is used to drive the drive wheel 104 to move closer to the auxiliary wheel 105 and to drive the drive wheel 104 to rotate.

[0072] The second drive assembly includes: a fifth motor 101, a sixth motor 102, a first pair of guide rods 1031, and a second pair of guide rods 1033; the second pair of guide rods 1033 are disposed inside the second frame; a first fixing block 1034 is fixedly installed on one side of the second pair of guide rods 1033, and a moving block 1032 is movably installed on the other side; the first pair of guide rods 1031 are disposed inside the first frame, and a helical rod is disposed inside the first pair of guide rods 1031; a second fixing block is fixedly installed on the first pair of guide rods 1031 at the position corresponding to the first fixing block 1034; the first pair of guide rods 1031, the second pair of guide rods 1033, and the helical rod are axially parallel; the fifth motor 101 is disposed on one side of the first frame and coaxially connected to the helical rod; the sixth motor 102 is sleeved on the helical rod and threadedly connected to the helical rod.

[0073] One end of the drive wheel 104 is coaxially connected to the output end of the sixth motor 102, and the other end is rotatably connected to the moving block 1032; one end of the auxiliary wheel 105 is rotatably connected to the first fixed block 1034, and the other end is rotatably connected to the second fixed block.

[0074] Furthermore, there are two drive wheels 104 and two auxiliary wheels 105 arranged side by side, and the two drive wheels 104 are installed in the same way.

[0075] When the cutting device is working, the metal sheath of the high-voltage cable passes between the drive wheel 104 and the auxiliary wheel 105. The fifth motor 101 is preferably a stepper motor, which drives the screw rod to rotate, adjusting the distance between the drive wheel 104 and the auxiliary wheel 105 to accommodate metal sheaths with different gears. Both the drive wheel 104 and the auxiliary wheel 105 are in contact with the surface of the metal sheath for movement on it. The surfaces of the drive wheel and the auxiliary wheel are made of composite rubber material and treated with sandblasting to increase friction, reduce relative slippage between the moving mechanism and the cable, and protect the cable from scratches or deformation.

[0076] The sixth motor 102 drives the drive wheel 104 to rotate, which in turn drives the entire walking mechanism to move along the surface of the metal sheath. The sixth motor 102 is preferably a stepper motor, whose walking distance can be preset and whose direction can be changed by changing the steering direction.

[0077] The motor signal is set by the PLC. When the locking torque reaches the set value, a pulse signal is sent and the PLC controls the motor to stop rotating. When the torque is too large or too small, the pulse signal sent will control the PLC to control the motor to rotate in the forward or reverse direction.

[0078] Embodiment 2 of the present invention provides a method for cutting the metal sheath of a high-voltage cable. The method utilizes the cutting device described in Embodiment 1 to perform radial and axial cutting of the metal sheath, aiming to solve the problems of difficulty in cutting the metal sheath of high-voltage cables and damage to the cable during cutting. The cutting method includes the following steps:

[0079] Step 1: Place the cutting device onto the metal sheath 7 of the high-voltage cable;

[0080] Specifically, the high-voltage cable metal sheath 7 passes sequentially between the drive wheel 104 and auxiliary wheel 105 of the walking mechanism 2, between the sliding claw assembly of the clamping mechanism 4, and between the first through hole of the rotating mechanism 2 and the axial breaking mechanism 3 and radial breaking mechanism 6.

[0081] Step 2: The fourth motor 406 of the clamping mechanism 4 is activated by the control device, so that the three sliding claw assemblies 403 move toward the high voltage cable metal sheath 7 to clamp the high voltage cable metal sheath 7.

[0082] Step 3: Start the ranging mechanism 5 to scan the axial contour of the high-voltage cable metal sheath 7 and send the axial contour data to the control device. The control device sets the feed amount of the axial breaking mechanism 3, i.e. the cutting depth, according to the shape of the high-voltage cable metal sheath 7.

[0083] Step 4: Start the walking mechanism 1, rotating mechanism 2, axial cutting mechanism 3 and radial cutting mechanism 6 through the control mechanism. Drive the cutting device axially through the walking mechanism 1 to complete the axial metal sleeve cutting according to the set parameters.

[0084] Step 5: Start the ranging mechanism 5 to scan the radial profile of the high-voltage cable metal sheath 7 and send the radial profile data to the control device. The control device sets the cutting depth of the radial breaking mechanism 6 according to the shape of the high-voltage cable metal sheath 7.

[0085] Step 6: Start the cutting device and drag it radially through the traveling mechanism 1 to complete the radial metal sleeve cutting according to the set parameters;

[0086] Step 7: Release the clamping mechanism 4 and remove the cutting device from the high-voltage cable metal sheath 7.

[0087] like Figure 7 As shown, the high-voltage cable metal sheath 7 is cut using the cutting method of this embodiment of the invention. The radial cut 701 and axial cut 702 can be seen.

[0088] The beneficial effects of this invention are that, compared with the prior art, this invention enables axial cutting of the metal sheath by using an axial cutting mechanism combined with a traveling mechanism, and radial cutting of the metal sheath by using a radial cutting mechanism combined with a rotating mechanism. By setting a ranging mechanism, the external dimensions of the high-voltage cable's metal sheath can be scanned, and the feed rates of the axial and radial cutting mechanisms can be set by a control device based on the external dimension data obtained from the ranging mechanism. This allows for flexible control of the axial and longitudinal cutting depths for metal sheaths of different sizes, solving the problem in traditional technologies where manual operation cannot effectively control the cutting depth, thus damaging the inner shielding layer of the high-voltage cable.

[0089] Furthermore, this invention also includes a clamping mechanism, which can firmly clamp the metal sheath of the high-voltage cable, thereby making the cutting more stable. Simultaneously, the clamping jaw size can be adjusted by the drive assembly, thus allowing for good fit with high-voltage cable metal sheaths of different sizes.

[0090] Furthermore, this invention, by incorporating a traveling mechanism in conjunction with a clamping mechanism, enables the cutting device to move across the surface of the corrugated pipe's metal sheath. Combined with a control device, this achieves fully automated operation of the cutting device. From clamping the high-voltage cable's metal sheath to scanning its shape data, and then controlling the traveling and cutting mechanisms to cut the metal sheath, this invention saves manpower while making the cutting operation more intelligent and precise, thus ensuring the effective cutting of the high-voltage cable's metal sheath.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A cutting device for the metal sheath of a high-voltage cable, comprising: The switching mechanism and control device are characterized in that: The cutting device also includes: a walking mechanism (1), a rotating mechanism (2), and a ranging mechanism (5); One side of the rotating mechanism (2) is connected to the breaking mechanism; a first through hole is provided at the center of the rotating mechanism (2) for the high-voltage cable metal sheath (7) to pass through, and the rotating mechanism (2) is used to drive the breaking mechanism to rotate on the surface of the high-voltage cable metal sheath (7); The cutting mechanism includes an axial cutting mechanism (3) and a radial cutting mechanism (6) symmetrically arranged on opposite sides of the rotating mechanism (2), which are used to cut the high-voltage cable metal sheath (7) along the axial and radial directions, respectively. The axial breaking mechanism (3) includes: a housing (302), a first motor (303), a metal cutting blade (304), a second motor (305), a lifting mechanism (306), and a support structure (307). The support structure (307) is located inside the outer shell (302) and on one side of the outer shell (302); a metal cutting blade (304) is rotatably mounted on one side of the support structure (307), and the other side is fixedly connected to the lifting end of the lifting mechanism (306); a first motor (303) is provided on the top of the support structure (307), and the output end of the first motor (303) is connected to the metal cutting blade (304) through a bevel gear transmission mechanism; The fixed end of the lifting mechanism is fixedly connected to the rotating mechanism (2); the second motor (305) is located on one side of the lifting mechanism and is used to drive the lifting end to achieve lifting. The walking mechanism (1) is located on the side of the rotating mechanism (2) away from the cutting mechanism, and is used to drive the cutting device to move on the metal sheath (7) of the high-voltage cable; The walking mechanism (1) is located on the side of the clamping mechanism (4) away from the rotating mechanism (2), and includes: a fixed base (103), a drive wheel (104), an auxiliary wheel (105), and a second drive assembly; The fixed base (103) is fixedly connected to the clamping mechanism (4) on the side away from the rotating mechanism (2); the fixed base (103) includes: a first frame and a second frame, and a gap is left between the first frame and the second frame for the metal sheath (7) of the high voltage cable to pass through. The drive wheel (104) and the auxiliary wheel (105) are both vertically installed between the first frame and the second frame, and a gap is left between the drive wheel (104) and the auxiliary wheel (105) for the high-voltage cable metal sheath (7) to pass through. The second drive assembly is used to drive the drive wheel (104) to move closer to the auxiliary wheel (105) and to drive the drive wheel (104) to rotate; The ranging mechanism (5) is located on the side of the rotating mechanism (2) near the breaking mechanism and is used to scan the external dimensions of the high-voltage cable metal sheath (7). The control device is connected to the rotating mechanism (2), the breaking mechanism and the ranging mechanism (5), and is used to control the feed amount of the breaking mechanism based on the external dimension data obtained by scanning by the ranging mechanism (5).

2. The high-voltage cable metal sheath cutting device according to claim 1, characterized in that: The cutting device further includes: a clamping mechanism (4); The clamping mechanism (4) is located on the side of the rotating mechanism (2) away from the disconnecting mechanism, and is used to allow the high-voltage cable metal sheath (7) to pass through and clamp the high-voltage cable metal sheath (7).

3. The high-voltage cable metal sheath cutting device according to claim 2, characterized in that: The clamping mechanism (4) includes: a second fixed base plate (401), a second drive assembly, and a sliding claw assembly (403). The second fixed base plate (401) and the second drive assembly are both provided with a second through hole for the high voltage cable metal sheath (7) to pass through. The second drive assembly is provided on one side of the second fixed base plate (401). The second drive assembly is provided with a plurality of sliding claw assemblies (403) evenly spaced along the circumference of the second through hole. The clamping end of the sliding claw assembly (403) extends into the second through hole. The second drive assembly is used to drive each sliding claw assembly (403) to move radially along the second through hole to clamp the high voltage cable metal sheath (7).

4. The high-voltage cable metal sheath cutting device according to claim 3, characterized in that: The second drive assembly includes: a second spur gear mechanism (402), an assembly housing (404), a guide rail (405), and a fourth motor (406). One side of the second spur gear mechanism (402) is rotatably connected to the second fixed base plate (401), and the other side is fixedly connected to the guide slide rail (405) for driving the guide slide rail (405) to rotate; the guide slide rail (405) is provided with a spiral groove; the fourth motor (406) is disposed on the second fixed base plate (401) and is used to drive the second spur gear mechanism (402) to mesh and transmit; The component housing (404) covers the outside of the guide slide rail (405) and the second spur gear mechanism (402), with its open end fixedly connected to the second fixed base plate (401) and the other end fixedly connected to the rotating mechanism (2), and is provided with a guide groove; The sliding claw assembly (403) is radially movable in the guide groove along the second through hole, and the sliding claw of the sliding claw assembly (403) passes through the guide groove and is inserted into the spiral groove of the guide rail (405), and moves radially along the second through hole when the guide rail (405) rotates.

5. The high-voltage cable metal sheath cutting device according to claim 4, characterized in that: The second spur gear mechanism (402) includes: a first gear, a second gear, and a third gear; the second gear and the third gear are the same size, and the first gear is larger than the second gear and the third gear; the first gear, the second gear, and the third gear are rotatably mounted on one side of the second fixed base plate (401) and are connected by external meshing transmission in sequence; the first gear is rotatably connected to the second fixed base plate (401) through an angular contact ball bearing, the inside of the first gear is connected to the outer ring of the angular contact ball bearing, and the inner ring of the angular contact ball bearing is connected and fixed to the second fixed base plate (401); the side of the first gear away from the second fixed base plate (401) is fixedly connected to the guide rail (405).

6. The high-voltage cable metal sheath cutting device according to claim 5, characterized in that: The second drive assembly includes: a fifth motor (101), a sixth motor (102), a first pair of guide rods (1031), and a second pair of guide rods (1033); The second pair of guide rods (1033) are located inside the second frame; a first fixing block (1034) is fixedly installed on one side of the second pair of guide rods (1033), and a moving block (1032) is movably installed on the other side. The first pair of guide rods (1031) are disposed inside the first frame. A helical rod is disposed inside the first pair of guide rods (1031). A second fixing block is fixedly installed on the first pair of guide rods (1031) at the position corresponding to the first fixing block (1034). The first pair of guide rods (1031), the second pair of guide rods (1033) and the helical rod are parallel in axis. The fifth motor (101) is disposed on one side of the first frame and is coaxially connected to the helical rod. The sixth motor (102) is sleeved on the helical rod and threadedly connected to the helical rod. One end of the drive wheel (104) is coaxially connected to the output end of the sixth motor (102), and the other end is rotatably connected to the moving block (1032); one end of the auxiliary wheel (105) is rotatably connected to the first fixed block (1034), and the other end is rotatably connected to the second fixed block.

7. The high-voltage cable metal sheath cutting device according to claim 5, characterized in that: The surfaces of the drive wheel (104) and the auxiliary wheel (105) are made of composite rubber material and are sandblasted.

8. The high-voltage cable metal sheath cutting device according to claim 7, characterized in that: The outer casing (302) has an open structure on the side near the rotating mechanism (2) for connecting the lifting mechanism (306) and the rotating mechanism (2); The front cover is detachably mounted on the side of the housing (302) away from the rotating mechanism (2) via a slot, and a spring latch (301) for locking the front cover is provided on one side of the housing (302).

9. The high-voltage cable metal sheath cutting device according to claim 7, characterized in that: The radial breaking mechanism (6) has the same structure and size as the axial breaking mechanism (3), the only difference being the different orientation of the metal cutting blade (304); when the high-voltage cable metal sheath (7) passes through the first through hole, the metal cutting blade (304) of the axial breaking mechanism (3) is parallel to the axial direction of the high-voltage cable metal sheath (7); the metal cutting blade (304) of the radial breaking mechanism (6) is parallel to the radial direction of the high-voltage cable metal sheath (7).

10. The cutting device for the metal sheath of a high-voltage cable according to any one of claims 1-5, characterized in that: The rotating mechanism (2) includes: a first fixed base plate and a first driving assembly; Both the first fixed base plate and the first drive assembly are provided with a first through hole at the center for the metal sheath (7) of the high voltage cable to pass through; One end of the first driving component is rotatably connected to the first fixed base plate, and the other end is fixedly connected to the rotating base plate. It is used to drive the rotating base plate to rotate. The rotating base plate is used to install the axial breaking mechanism (3), the radial breaking mechanism (6), and the ranging mechanism (5).

11. The high-voltage cable metal sheath cutting device according to claim 10, characterized in that: The first drive assembly includes: a first spur gear mechanism and a third motor; The first spur gear mechanism includes a fourth gear, a fifth gear, and a sixth gear. The fifth gear and the sixth gear are the same size, and the fourth gear is larger than the fifth gear and the sixth gear. The fourth gear, the fifth gear, and the sixth gear are all rotatably mounted on one side of the first fixed base plate and are connected by external meshing transmission in sequence. The fourth gear is rotatably connected to the first fixed base plate via an angular contact ball bearing. The interior of the fourth gear is connected to the outer ring of the angular contact ball bearing, and the inner ring of the angular contact ball bearing is connected and fixed to the first fixed base plate. The third motor is located on one side of the first fixed base plate, and its output end is coaxially connected to the sixth gear.

12. A method for cutting the metal sheath of a high-voltage cable, using the high-voltage cable metal sheath cutting device according to any one of claims 1-11, characterized in that, Includes the following steps: The rotating mechanism (2) is fitted onto the metal sheath (7) of the high-voltage cable; Start the ranging mechanism (5) to scan the axial and radial contours of the high-voltage cable metal sheath (7) and send the obtained contour data to the control device; Based on the contour data obtained by the ranging mechanism (5), the control device sets the axial cutting depth of the axial breaking mechanism (3) and the longitudinal cutting depth of the longitudinal breaking mechanism (6). Start the walking mechanism (1), rotating mechanism (2), axial cutting mechanism (3) and longitudinal cutting mechanism (6) to sequentially cut the metal sheath (7) of the high-voltage cable axially and longitudinally.

Images