Cutting-off device and cutting-off method for high-voltage cable metal sheath

Abstract

The invention discloses a cutting device and a cutting method for a metal sheath of a high-voltage cable. The device comprises an on-off mechanism, a control device, a walking mechanism, a rotating mechanism and a distance measuring mechanism, the breaking mechanism comprises an axial breaking mechanism and a radial breaking mechanism which are symmetrically arranged on the two opposite sides of the rotating mechanism and used for cutting the high-voltage cable metal sheath in the axial direction and the radial direction of the high-voltage cable metal sheath respectively. The distance measuring mechanism is arranged on the side, close to the on-off mechanism, of the rotating mechanism and used for scanning the boundary dimension of the high-voltage cable metal sheath. The control device is used for controlling the feeding amount of the on-off mechanism based on boundary dimension data obtained through scanning of the distance measuring mechanism. According to the cutting device and the cutting method for the high-voltage cable metal sheath, the axial cutting depth and the longitudinal cutting depth can be flexibly controlled for metal sheaths of different sizes, and the installation efficiency and the installation quality of a cable terminal and a connector are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of cutting off power cable accessories, and in particular relates to a cutting device and a cutting method for a metal sheath of a high-voltage cable. Background Art

[0002] With the rapid development of society, the process of urbanization is accelerating. As an important equipment in the urban power grid, the market demand for high-voltage cables has increased dramatically. Among them, cable accessories are an important part of power cables. They are products that connect cables to transmission and distribution lines and related distribution devices. Together with cables, they constitute a power transmission network. They mainly include cable terminals and connectors, which are key links in cable lines. The production and construction of cable terminals and connectors is huge. However, after the metal sheath of the cable body is cut off, it is still inspected by manual experience inspection combined with installation dimension verification. There are outstanding problems such as low efficiency of on-site detection of process defects, low standardization and consistency of production quality evaluation, etc., which still restrict the effectiveness of the quality control work of high-voltage cable terminals and connectors, and affect the further improvement of the intrinsic safety level of high-voltage cable equipment in electrical construction and engineering acceptance.

[0003] To improve the installation of cable terminals and connectors, the traditional method is to use a combination of axial cutting with a grinder and radial cutting with a crescent knife to cut the cable metal sheath. This can only be detected by manual operation, and the cutting depth cannot be well guaranteed, which easily causes damage to the inner shielding layer of the high-voltage cable. In order to ensure the cutting quality of the cable metal sheath and avoid damaging the cable shielding layer, a cutting device and cutting method for the high-voltage cable metal sheath are needed. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a cutting device and a cutting method for a high-voltage cable metal sheath, which can flexibly control the axial cutting depth and the longitudinal cutting depth 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 a metal sheath of a high-voltage cable, comprising: a breaking mechanism and a control device, the cutting device further comprising: a walking mechanism, a rotating mechanism and a distance measuring mechanism; one side of the rotating mechanism is connected to the breaking mechanism; a first through hole for the metal sheath of the high-voltage cable to pass through is arranged at the center of the rotating mechanism, and the rotating mechanism is used to drive the breaking mechanism to rotate on the surface of the metal sheath of the high-voltage cable; the breaking mechanism comprises: an axial breaking mechanism and a radial breaking 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 direction and radial direction of the metal sheath of the high-voltage cable; the walking mechanism is arranged on a side of the rotating mechanism away from the breaking mechanism, and is used to drive the cutting device to move on the metal sheath of the high-voltage cable; the distance measuring mechanism is arranged on a side of the rotating mechanism close to the breaking mechanism, and is used to scan the outer dimensions of the metal sheath of the high-voltage cable; the control device is connected to the rotating mechanism, the breaking mechanism and the distance measuring mechanism, and is used to control the feed amount of the breaking mechanism based on the outer dimension data scanned by the distance measuring mechanism.

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

[0008] Preferably, the clamping mechanism includes: a second fixed base plate, a second driving assembly and a sliding claw assembly; a second through hole for the high-voltage cable metal sheath to pass through is provided at the center of the second fixed base plate and the second driving assembly, the second driving assembly is provided on one side of the second fixed base plate, and the second driving assembly is provided with a plurality of sliding claw assemblies evenly spaced along the circumference of the second through hole, and the clamping end of the sliding claw assembly extends into the inside 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 component includes: a second spur gear mechanism, a component housing, a guide slide 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 slide rail, for driving the guide slide rail to rotate; the guide slide rail is provided with a spiral slide groove; the fourth motor is arranged on the second fixed base plate and is used to drive the second spur gear mechanism to engage in transmission; the component housing cover is arranged on the outside of the guide slide rail and the second spur gear mechanism, its open end is fixedly connected to the second fixed base plate, and the other end is fixedly connected to the rotating mechanism, and is provided with a guide groove; the sliding claw assembly can be installed in the guide groove so as to be movably radially along the second through hole, and the sliding claw of the sliding claw assembly passes through the guide groove and is plug-matched with the spiral slide groove of the guide slide rail, and moves radially along the second through hole when the guide slide rail rotates.

[0010] Preferably, the second spur gear mechanism comprises: a first gear, a second gear and a third gear; the second gear and the third gear have 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 can be rotatably mounted on one side of the second fixed base plate, and are connected in sequence by external meshing transmission; the first gear is rotatably connected to the second fixed base plate through an angular contact ball bearing, the interior 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 fixedly connected to the second fixed base plate; the side of the first gear away from the second fixed base plate is fixedly connected to the guide rail.

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

[0012] Preferably, the second driving 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 arranged inside the second frame; a first fixed 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 arranged inside the first frame, a spiral rod is arranged inside the first pair of guide rods, and a second fixed block is fixedly installed at a position of the first pair of guide rods corresponding to the first fixed block; the axes of the first pair of guide rods, the second pair of guide rods and the spiral rods are parallel; the fifth motor is arranged on one side of the first frame and is coaxially connected to the spiral rod; the sixth motor sleeve is arranged on the spiral rod and is threadedly connected to the spiral rod; one end of the driving 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 fixed block, and the other end is rotatably connected to the second fixed block.

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

[0014] Preferably, the axial breaking mechanism includes: a shell, a first motor, a metal cutting blade, a second motor, a lifting mechanism and a supporting structure; the supporting structure is arranged inside the shell and on one side of the shell; a metal cutting blade is rotatably mounted on one side of the supporting structure, and the other side is fixedly connected to the lifting end of the lifting mechanism; a first motor is arranged on the top of the supporting 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 arranged on one side of the lifting mechanism, and is used to drive the lifting end to achieve lifting.

[0015] Preferably, the side of the shell close to the rotating mechanism is an open structure for connecting the lifting mechanism with the rotating mechanism; the side of the shell away from the rotating mechanism is detachably mounted with a front cover through a slot, and a spring lock for locking the front cover is provided on one side of the shell.

[0016] Preferably, the radial breaking mechanism has the same structure and size as the axial breaking mechanism, and the only difference is that the setting direction of the metal cutting blade is different; when the metal sheath of the high-voltage cable passes through the first through hole, the metal cutting blade of the axial breaking mechanism is parallel to the axial direction of the metal sheath of the high-voltage cable; the metal cutting blade of the radial breaking mechanism is parallel to the radial direction of the metal sheath of the high-voltage cable.

[0017] Preferably, the rotating mechanism comprises: a first fixed base plate and a first driving assembly; a first through hole for the metal sheath of the high-voltage cable to pass through is provided at the center of the first fixed base plate and the first driving assembly; 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, and is used to drive 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 driving 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 have 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 can be rotatably mounted on one side of the first fixed base plate, and are connected in sequence 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 arranged on one side of the first fixed base plate, and its output end is coaxially connected to the sixth gear.

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

[0020] Sleeve the rotating mechanism onto the metal sheath of the high-voltage cable;

[0021] Starting the distance measuring mechanism to scan the axial profile and radial profile of the metal sheath of the high-voltage cable, and sending the obtained profile data to the control device;

[0022] The control device sets the axial cutting depth of the axial breaking mechanism and the longitudinal cutting depth of the longitudinal breaking mechanism based on the profile data obtained by the distance measuring mechanism;

[0023] The traveling mechanism, the rotating mechanism, the axial breaking mechanism and the longitudinal breaking mechanism are started to perform axial cutting and longitudinal cutting on the metal sheath of the high-voltage cable in turn.

[0024] Compared with the prior art, the beneficial effect of the present invention is that the present invention can cut the metal sheath axially by moving the axial breaking mechanism in combination with the walking mechanism, and can cut the metal sheath radially by rotating the radial breaking mechanism in combination with the rotating mechanism. By setting a distance measuring mechanism, the outer dimensions of the metal sheath of the high-voltage cable can be scanned, and the feed amount of the axial breaking mechanism and the radial breaking mechanism can be set based on the outer dimension data obtained by the distance measuring mechanism through the control device, so that the axial cutting depth and the longitudinal cutting depth can be flexibly controlled for metal sheaths of different sizes, solving the problem that the cutting depth cannot be well controlled by manual operation in the traditional technology, thereby damaging the inner shielding layer of the high-voltage cable.

[0025] In addition, the present invention is also provided with a clamping mechanism, which can firmly clamp the high-voltage cable metal sheath, thereby making the cutting more stable. At the same time, the size of the clamping opening of the clamping mechanism can be adjusted by a driving component, so as to be well equipped with high-voltage cable metal sheaths of different sizes.

[0026] Furthermore, the present invention can drive the cutting device to move on the surface of the metal sheath of the corrugated pipe by setting a walking mechanism in conjunction with the clamping mechanism, and can realize the fully automated operation of the cutting device by working together with the control device. From clamping the metal sheath of the high-voltage cable, to scanning the shape data, and then to controlling the walking mechanism and the breaking mechanism to cut the metal sheath, while saving manpower, the cutting operation is made more intelligent and accurate, thereby ensuring the cutting effect of the metal sheath of the high-voltage cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a cutting device for a high-voltage cable metal sheath in the present invention;

[0028] Figure 2 It is a structural schematic diagram of the axial breaking mechanism in the present invention;

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

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

[0031] Figure 5 It is a structural schematic diagram of the clamping mechanism in the present invention;

[0032] Figure 6 It is a structural schematic diagram of the walking mechanism in the present invention;

[0033] Figure 7 It is a schematic structural diagram of the metal sheath of a high-voltage cable after being cut by the cutting device of the present invention.

[0034] Reference numerals in the figures:

[0035] 1. Walking mechanism; 101. Fifth motor; 102. Sixth motor; 103. Fixed seat; 1031. First pair of guide rods; 1032. Moving block; 1033. Second pair of guide rods; 1034. Fixed block; 104. Driving 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 breaking mechanism;

[0041] 7. Metal sheath of high voltage cable; 701. Radial incision; 702. Axial incision. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described in this application are only part of the embodiments of the present invention, not all of them. Based on the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0043] The high-voltage cable metal sheath is a metal sheath for 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 it also has anti-electromagnetic interference and fire-proof and explosion-proof functions.

[0044] The cable insulation shielding layer is the insulation shielding layer of cables of 110kV and above. 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 balance the field strength, smooth the voltage intensity, and prevent the cable from damage caused by corona.

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

[0046] The control device is an external component, and the control device is connected to the traveling mechanism 1, the rotating mechanism 2, the breaking mechanism, the clamping mechanism 4, and the distance measuring mechanism 5. The control device controls the clamping mechanism 4 to clamp the metal sheath 7 of the high-voltage cable according to the shape data of the metal sheath 7 of the high-voltage cable measured by the distance measuring mechanism 5 through the PLC, and controls the feed amount of the breaking mechanism based on the shape size data scanned by the distance measuring mechanism 5, and controls the breaking mechanism, the rotating mechanism 2, and the traveling 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 respectively located on both sides of the metal sheath of the high-voltage cable when working. The difference between the axial breaking mechanism 3 and the radial breaking mechanism 6 is only that the setting direction of the metal cutting blade 304 is different. 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: a spring lock 301 , a housing 302 , a first motor 303 , a metal cutting blade 304 , a second motor 305 , a lifting mechanism 306 and a supporting structure 307 .

[0049] The housing 302 is composed of a top cover, a left side plate, a right side plate, a front cover, and a bottom plate, and surrounds the internal structural parts of the disconnecting assembly, which protects the disconnecting assembly while also protecting the safety of the operators.

[0050] The rear side of the housing 302 is an open structure, and the front cover is detachably inserted into the front side of the housing 302 from top to bottom. A spring lock 301 for locking the front cover is provided on the top of the housing 302. When the cutting device is working, the front cover is locked by the spring lock 301 to prevent the saw blade or cutting blade from breaking and flying out to injure people; when the saw blade or cutting blade needs to be replaced, the spring lock 301 is released, and the front cover is pulled out from the top to replace the saw blade or cutting blade.

[0051] Combination Figure 2 , Figure 3 As shown, the support structure 307 is arranged inside the housing 302 and at the bottom of the housing 302. A first transmission shaft is rotatably mounted on one side of the support structure 307, one end of the first transmission shaft extends to the outside of the support structure 307 and is mounted with a metal cutting blade 304; a second transmission shaft is rotatably mounted on the top of the support structure 307, the second transmission shaft is perpendicular to the axis of the first transmission shaft, and is connected through 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 space-avoiding design to reduce the weight of the parts and play a role in supporting the entire disconnect assembly.

[0053] The first motor 303 is fixedly installed inside the housing 302 and is located on the top of the support structure 307. The output end of the first motor 303 is coaxially connected to the second transmission shaft, and is used to drive the first transmission shaft and the metal cutting blade 304 to rotate through the second transmission shaft and the 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, huge starting speed, a 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 sheath is completely cut off, and it is convenient to remove the metal sheath after cutting.

[0054] Combination Figure 4 As shown, the second motor 305 is arranged inside the housing 302, and the output end of the second motor 305 is fixedly installed with a lifting mechanism 306, which passes through the rear side opening of the housing 302 and is fixedly connected with the rotating mechanism 2. The lifting mechanism 306 is provided with a screw rod and a screw sleeve inside, and the screw sleeve is threadedly connected with the screw rod. The screw rod is coaxially connected with the output end of the second motor 305, and the screw sleeve is fixedly connected with a side of the support structure 307 away from the metal cutting blade 304. The screw rod is driven to rotate by the second motor 305 to form a linear guide mechanism, which drives the screw sleeve, the support structure 3 and the metal cutting blade 304 to realize lifting, and has the advantages of high precision, strong rigidity, long life and low noise. The second motor 305 is preferably a stepping motor.

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

[0056] Furthermore, a distance measuring mechanism 5 is provided on the bisecting plane between the radial breaking mechanism and the axial breaking mechanism, preferably but not limited to a laser distance measuring sensor. The distance measuring mechanism 5 is fixedly mounted on the rotating substrate of the rotating mechanism 2, and the outer dimensions of the metal sheath are pre-scanned by the laser distance measuring sensor. The tool feed amount is controlled by the scanning data to ensure that the feed amount 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 substrate, a first gear mechanism and a first rotating substrate.

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

[0059] The first straight gear mechanism includes: a fourth gear, a fifth gear and a sixth gear, the fifth gear and the sixth gear have 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 can be 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 fixedly connected to the first fixed base plate. The third motor is arranged 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 arranged on one side of the first gear away from the first fixed base plate, and the rotating base plate is fixedly connected to the lifting mechanism of the axial breaking mechanism 3, the radial breaking mechanism 6 and the distance measuring mechanism 5, and the two lifting mechanisms are symmetrically arranged on both sides of the first rotating base plate. The first spur gear mechanism is driven by the first motor to drive the first rotating mechanism and the breaking mechanism to rotate, so that the metal cutting blade can rotate along the central axis of the metal sheath while rotating, 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 timely adjust the rotation speed of the rotating mechanism 2; the start and stop positions can be accurately controlled; a spur gear transmission mechanism is adopted, 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] A second through hole for the high-voltage cable metal sheath 7 to pass through is provided at the center of the second fixed substrate 401 and the second driving assembly. The second driving assembly is arranged on one side of the second fixed substrate 401. The second driving assembly is provided with a plurality of sliding claw assemblies 403 at even intervals along the circumference of the second through hole. The clamping end of the sliding claw assembly 403 extends into the inside 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 driving 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 disposed outside the guide rail 405 and the second spur gear mechanism 402, with an open end fixedly connected to the second fixed base plate 401, and the other end fixedly connected to the rotating mechanism 2, and provided with a guide groove;

[0066] The sliding claw assembly 403 can be installed in the guide groove so as to move radially along the second through hole, and the sliding claw of the sliding claw assembly 403 passes through the guide groove and is plugged into the spiral groove of the guide rail 405, and moves radially along the second through hole when the guide rail 405 rotates.

[0067] In a preferred but non-limiting embodiment of the present invention, three sliding claw assemblies 403 are evenly arranged along the circumference at equal intervals, 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 have 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 can be rotatably mounted on one side of the second fixed base plate 401, and are connected in sequence by external meshing transmission; the first gear is rotatably connected to the second fixed base plate 401 through an angular contact ball bearing, the interior 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 disposed on the second fixed base plate 401, and its output end is coaxially connected with the third gear to drive the second spur gear mechanism 402 to mesh and transmit. The fourth motor 406 is also preferably a stepping motor.

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

[0071] The fixing seat 103 is fixedly connected to the second fixing base plate 401 of the clamping mechanism 4. The fixing seat 103 includes: a first frame and a second frame, and a gap is left between the first frame and the second frame for the high-voltage cable metal sheath 7 to pass through. The driving 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 driving wheel 104 and the auxiliary wheel 105 for the high-voltage cable metal sheath 7 to pass through; the second driving assembly is used to drive the driving wheel 104 to move toward the auxiliary wheel 105 and drive the driving wheel 104 to rotate.

[0072] The second driving 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 arranged inside the second frame; a first fixed block 1034 is fixedly installed on one side of the second pair of guide rods 1033, and a movable block 1032 is movably installed on the other side; the first pair of guide rods 1031 are arranged inside the first frame, a spiral rod is arranged inside the first pair of guide rods 1031, and a second fixed block is fixedly installed on the position of the first pair of guide rods 1031 corresponding to the first fixed block 1034; the axial directions of the first pair of guide rods 1031, the second pair of guide rods 1033 and the spiral rod are parallel; the fifth motor 101 is arranged on one side of the first frame and is coaxially connected to the spiral rod; the sixth motor 102 is sleeved on the spiral rod and is threadedly connected to the spiral rod.

[0073] One end of the driving 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, two driving wheels 104 and two auxiliary wheels 105 are arranged in parallel, and the two driving wheels 104 are installed in the same manner.

[0075] When the cutting device is working, the metal sheath of the high-voltage cable passes between the driving wheel 104 and the auxiliary wheel 105. The fifth motor 101 is preferably a stepping motor. The fifth motor 101 drives the spiral rod to rotate, and the distance between the driving wheel 104 and the auxiliary wheel 105 can be adjusted, and the metal sheaths of different gears can be adapted. The driving wheel 104 and the auxiliary wheel 105 are both in contact with the surface of the metal sheath and are used to walk on the metal sheath. The surface of the driving wheel and the auxiliary wheel is composited with rubber material, and the surface is treated by sandblasting and the like to increase friction, reduce the relative sliding between the walking mechanism and the cable, and protect the cable from being scratched or squeezed and deformed.

[0076] The sixth motor 102 can drive the entire walking mechanism to walk along the surface of the metal sheath by driving the driving wheel 104 to rotate. The sixth motor 102 is preferably a stepping motor, the walking distance of which can be preset, and the walking direction can be changed by changing the direction.

[0077] The motor signal is set through PLC. When the locking torque reaches the setting, a pulse signal is sent out and PLC controls the motor to stop rotating. When the torque is too large or too small, a pulse signal is sent out and PLC controls the motor to rotate forward or reverse.

[0078] Embodiment 2 of the present invention provides a method for cutting a metal sheath of a high-voltage cable. The method for cutting a metal sheath uses the cutting device in embodiment 1 to complete radial cutting and axial cutting of the metal sheath, with the purpose of solving the problem that the metal sheath of the high-voltage cable is difficult to cut and the cable is damaged during cutting. The cutting method comprises the following steps:

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

[0080] Specifically, the high-voltage cable metal sheath 7 is passed in sequence between the driving wheel 104 and the auxiliary wheel 105 of the walking mechanism 2, between the sliding claw assemblies of the clamping mechanism 4, and between the first through hole of the rotating mechanism 2 and the axial breaking mechanism 3 and the radial breaking mechanism 6.

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

[0082] Step 3: Start the distance measuring mechanism 5 to scan the axial profile of the high-voltage cable metal sheath 7, and send the axial profile data to the control device. The control device sets the feed amount of the axial breaking mechanism 3, that is, the cutting depth, according to the shape of the high-voltage cable metal sheath 7;

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

[0084] Step 5: Start the distance measuring 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, which 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, drag the cutting device radially through the walking mechanism 1, and 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 metal sheath 7 of the high-voltage cable.

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

[0088] The beneficial effect of the present invention is that, compared with the prior art, the present invention can cut the metal sheath axially by moving the axial breaking mechanism in combination with the walking mechanism, and can cut the metal sheath radially by rotating the radial breaking mechanism in combination with the rotating mechanism. By setting a distance measuring mechanism, the outer dimensions of the metal sheath of the high-voltage cable can be scanned, and the feed amount of the axial breaking mechanism and the radial breaking mechanism can be set based on the outer dimension data obtained by the distance measuring mechanism through the control device, so that the axial cutting depth and the longitudinal cutting depth can be flexibly controlled for metal sheaths of different sizes, solving the problem that the cutting depth cannot be well controlled by manual operation in the traditional technology, thereby damaging the inner shielding layer of the high-voltage cable.

[0089] In addition, the present invention is also provided with a clamping mechanism, which can firmly clamp the high-voltage cable metal sheath, thereby making the cutting more stable. At the same time, the size of the clamping opening of the clamping mechanism can be adjusted by a driving component, so as to be well equipped with high-voltage cable metal sheaths of different sizes.

[0090] Furthermore, the present invention can drive the cutting device to move on the surface of the metal sheath of the corrugated pipe by setting a walking mechanism in conjunction with the clamping mechanism, and can realize the fully automated operation of the cutting device by working together with the control device. From clamping the metal sheath of the high-voltage cable, to scanning the shape data, and then to controlling the walking mechanism and the breaking mechanism to cut the metal sheath, while saving manpower, the cutting operation is made more intelligent and accurate, thereby ensuring the cutting effect of the metal sheath of the high-voltage cable.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A device for cutting off a metal sheath of a high voltage cable, comprising: The breaking mechanism and control device are characterized by: The cutting device further comprises: a walking mechanism (1), a rotating mechanism (2) and a distance measuring mechanism (5); One side of the rotating mechanism (2) is connected to the disconnecting mechanism; a first through hole for the high-voltage cable metal sheath (7) to pass through is provided at the center of the rotating mechanism (2); the rotating mechanism (2) is used to drive the disconnecting mechanism to rotate on the surface of the high-voltage cable metal sheath (7); The breaking mechanism comprises: an axial breaking mechanism (3) and a radial breaking mechanism (6) symmetrically arranged on opposite sides of the rotating mechanism (2), and used for cutting the high-voltage cable metal sheath (7) along the axial direction and radial direction of the high-voltage cable metal sheath (7), respectively; The walking mechanism (1) is arranged on a 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 distance measuring mechanism (5) is arranged on a side of the rotating mechanism (2) close to 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 distance measuring mechanism (5), and is used to control the feed rate of the breaking mechanism based on the external dimension data scanned by the distance measuring mechanism (5).

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

3. The cutting device for the metal sheath of a high voltage cable according to claim 2 is characterized in that: The clamping mechanism (4) comprises: a second fixed base plate (401), a second driving assembly and a sliding claw assembly (403); The second fixed substrate (401) and the second driving component are both provided with a second through hole at the center thereof for the high-voltage cable metal sheath (7) to pass through. The second driving component is provided on one side of the second fixed substrate (401). The second driving component is provided with a plurality of sliding claw components (403) at even intervals along the circumference of the second through hole. The clamping end of the sliding claw component (403) extends into the interior of the second through hole. The second driving component is used for driving each sliding claw component (403) to move radially along the second through hole to clamp the high-voltage cable metal sheath (7).

4. The cutting device for the metal sheath of a high voltage cable according to claim 3 is characterized in that: The second driving assembly comprises: 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), and is used to drive the guide rail (405) to rotate; the guide rail (405) is provided with a spiral slide groove; the fourth motor (406) is provided 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) is disposed outside the guide rail (405) and the second spur gear mechanism (402), an open end of which is fixedly connected to the second fixed base plate (401), and the other end of which is fixedly connected to the rotating mechanism (2), and is provided with a guide groove; The sliding claw assembly (403) can be installed in the guide groove so as to move radially along the second through hole, and the sliding claw of the sliding claw assembly (403) passes through the guide groove and is plugged 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 cutting device for the metal sheath of a high voltage cable according to claim 4 is characterized in that: The second spur gear mechanism (402) comprises: a first gear, a second gear and a third gear; the second gear and the third gear are of 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 connected in sequence by external meshing transmission; the first gear is rotatably connected to the second fixed base plate (401) via an angular contact ball bearing, the interior 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 fixedly connected 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 cutting device for the metal sheath of a high voltage cable according to any one of claims 2 to 5, characterized in that: The walking mechanism (1) is arranged on a side of the clamping mechanism (4) away from the rotating mechanism (2), and comprises: a fixing seat (103), a driving wheel (104), an auxiliary wheel (105) and a second driving assembly; The fixing seat (103) is fixedly connected to a side of the clamping mechanism (4) away from the rotating mechanism (2); the fixing seat (103) comprises: 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 driving 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 driving wheel (104) and the auxiliary wheel (105) for the high-voltage cable metal sheath (7) to pass through; The second driving assembly is used to drive the driving wheel (104) to move towards the auxiliary wheel (105) and to drive the driving wheel (104) to rotate.

7. The cutting device for the metal sheath of a high voltage cable according to claim 6 is characterized in that: The second driving assembly comprises: 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) is arranged inside the second frame; a first fixed block (1034) is fixedly mounted on one side of the second pair of guide rods (1033), and a movable block (1032) is movably mounted on the other side; The first pair of guide rods (1031) are arranged inside the first frame, a spiral rod is arranged inside the first pair of guide rods (1031), and a second fixing block is fixedly installed at a position of the first pair of guide rods (1031) corresponding to the first fixing block (1034); the axes of the first pair of guide rods (1031), the second pair of guide rods (1033) and the spiral rod are parallel; the fifth motor (101) is arranged at one side of the first frame and is coaxially connected to the spiral rod; the sixth motor (102) is sleeved on the spiral rod and is threadedly connected to the spiral rod; One end of the driving wheel (104) is coaxially connected to the output end of the sixth motor (102), and the other end is rotationally connected to the moving block (1032); one end of the auxiliary wheel (105) is rotationally connected to the first fixed block (1034), and the other end is rotationally connected to the second fixed block.

8. The cutting device for the metal sheath of a high voltage cable according to claim 6, characterized in that: The surfaces of the driving wheel (104) and the auxiliary wheel (105) are made of composite rubber material and are sandblasted.

9. The cutting device for the metal sheath of a high voltage cable according to any one of claims 1 to 5, characterized in that: The axial breaking mechanism (3) comprises: a housing (302), a first motor (303), a metal cutting blade (304), a second motor (305), a lifting mechanism (306) and a supporting structure (307); The support structure (307) is arranged inside the housing (302) and is located on one side of the housing (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 arranged on the top of the support structure (307), and an output end of the first motor (303) is connected to the metal cutting blade (304) via 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 arranged on one side of the lifting mechanism and is used to drive the lifting end to achieve lifting.

10. The cutting device for the metal sheath of a high voltage cable according to claim 9, characterized in that: The side of the housing (302) close to the rotating mechanism (2) is an open structure for connecting the lifting mechanism (306) to the rotating mechanism (2); A front cover is detachably mounted on a side of the housing (302) away from the rotating mechanism (2) via a slot, and a spring lock (301) for locking the front cover is provided on one side of the housing (302).

11. The cutting device for the metal sheath of a high voltage cable according to claim 9, characterized in that: The radial breaking mechanism (6) has the same structure and size as the axial breaking mechanism (3), and the only difference is that the metal cutting blade (304) is arranged in a different direction; 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); and 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).

12. The cutting device for the metal sheath of a high voltage cable according to any one of claims 1 to 5, characterized in that: The rotating mechanism (2) comprises: a first fixed base plate and a first driving assembly; A first through hole for a high-voltage cable metal sheath (7) to pass through is provided at the center of the first fixed base plate and the first driving assembly; 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, and 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 distance measuring mechanism (5).

13. The cutting device for the metal sheath of a high voltage cable according to claim 12, characterized in that: The first driving assembly includes: a first spur gear mechanism and a third motor; The first spur gear mechanism comprises: a fourth gear, a fifth gear and a sixth gear, the fifth gear and the sixth gear have 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 in sequence 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; The third motor is arranged on one side of the first fixed base plate, and an output end thereof is coaxially connected with the sixth gear.

14. A method for cutting a high voltage cable metal sheath, using the high voltage cable metal sheath cutting device according to any one of claims 1 to 13, characterized in that: The following steps are involved: Sleeve the rotating mechanism (2) onto the high-voltage cable metal sheath (7); Starting a distance measuring mechanism (5) to scan the axial profile and radial profile of a high-voltage cable metal sheath (7), and sending the obtained profile data to a control device; 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) based on the profile data obtained by the distance measuring mechanism (5); The walking mechanism (1), the rotating mechanism (2), the axial breaking mechanism (3) and the longitudinal breaking mechanism (6) are started to sequentially perform axial cutting and longitudinal cutting on the metal sheath (7) of the high-voltage cable.

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