A drain wire shielding layer brush trimming device

Abstract

This invention discloses a device for brushing and cutting the shielding layer of a lead-in cable, primarily relating to the field of power facility technology. It includes a housing, a clamping mechanism, and a brushing and cutting mechanism. The clamping mechanism comprises clamping housings symmetrically arranged at the front end of the housing, with two clamping housings joined together to form a circular sleeve for clamping the lead-in cable. The brushing and cutting mechanism includes a moving frame, a peeling mechanism, and a cutting mechanism disposed within the housing and moving within it. The cutting mechanism includes annular scissors that cooperate with the clamping housings to cut the shielding layer. In this invention, the circular sleeve formed by the two clamping housings clamps the lead-in cable. When the peeling mechanism flips the shielding layer forward and attaches it to the outside of the clamping housing, the annular scissors move forward to cooperate with the circular sleeve to cut the root of the shielding layer. The movement direction of the annular scissors is along the fiber core axis, and the fiber core penetrates deep into the annular scissors, avoiding damage to the fiber core during shielding layer cutting and ensuring the connection quality between the lead-in cable and the main line.

Description

Technical Field

[0001] This invention relates to the field of power facility technology, specifically to a brush-cutting device for the shielding layer of a drain wire. Background Technology

[0002] A drain wire typically refers to a connecting wire that crosses the conductor on both sides of a tension tower, used to allow current to bypass the tension insulator and the tower to continue power transmission to the other side. In medium and high voltage power cable systems, drain wires are needed to promptly remove charge in order to avoid energy loss due to induced magnetic fields caused by charge accumulation. Drain wires are usually used in conjunction with a metallic shielding layer to ensure that the charge flows smoothly into the grounding grid.

[0003] When connecting the main line and the lead line, the rubber layer at the end of the lead line needs to be stripped. After peeling off the outer layer, the remaining core is wrapped with the shielding layer. The shielding layer is usually a copper wire braided mesh, which is time-consuming, labor-intensive and inefficient to clean manually.

[0004] To address the aforementioned issues, a patent application with application number CN202010991931.8, entitled "A Stripping Device for Stripping the Shielding Layer in a Shielded Cable," has been developed. The device includes a base frame, a shielding layer stripping mechanism, a shielding layer recycling mechanism, and a core recycling mechanism. The shielding layer stripping mechanism comprises a mounting frame mounted on the base frame, a cutting disc located below a first guide groove and rotatably mounted on the mounting frame, and a cutting drive mechanism.

[0005] And patent application number CN201910425333.1, entitled "A Discharge Cutting Mechanism for Cable Shielding Layer and a Method for Removing Cable Shielding Layer Using the Mechanism," wherein the cutting part includes several opposing and abutting blocks that abut against the shielding layer, and the abutting blocks are connected to a cutting transformer. Electro-erosion is employed, and the shielding layer is broken by controlling the voltage to achieve instantaneous high temperature.

[0006] However, the above solutions have significant drawbacks: First, using a circular cutting disc to cut the shielding layer can easily damage the fiber core during the cutting process. Second, using electro-erosion, which involves controlling the voltage to achieve instantaneous high temperatures to break the shielding layer, is costly, and voltage fluctuations can also damage the fiber core. Therefore, the existing technology lacks a shielding layer brush-cutting device that can effectively break the shielding layer, is low-cost, and better protect the fiber core from damage. Summary of the Invention

[0007] The purpose of this invention is to solve the problems of high cost and easy damage to the fiber core when cutting the shielding layer of the above-mentioned shielding layer cutting mechanism, and to provide a guide wire shielding layer brush cutting device that is low in cost and can effectively protect the fiber core from damage when cutting the shielding layer.

[0008] To achieve the above objectives, the present invention employs the following technical solution: A device for brushing and cutting the shielding layer of a drain line includes a housing, a clamping mechanism for clamping the drain line and a brushing and cutting mechanism for brushing and cutting the shielding layer, the clamping mechanism including clamping shells symmetrically arranged at the front end of the housing, the two clamping shells moving synchronously in the same or opposite directions on the inner wall of the housing, and the two clamping shells being spliced ​​together to form a circular sleeve for clamping the drain line. The brush-cutting mechanism includes a movable frame disposed within the housing and moving within the housing, a stripping mechanism disposed on the movable frame for stripping the shielding layer from the wire core, and a cutting mechanism for cutting the stripped shielding layer. The cutting mechanism includes annular scissors that cooperate with the clamping housing to cut the shielding layer, the annular scissors passing through the movable frame and moving within the movable frame.

[0009] Furthermore, the front end of the box is provided with an opening, and the bottom of the opening is provided with a positioning groove for positioning the guide wire.

[0010] Furthermore, the inner wall of the box is provided with sliders symmetrically arranged on the left and right sides with the positioning groove as the center. The sliders are slidably connected to the inner wall of the box. The clamping housing is installed on one end of the inner side of the slider. The inner wall of the box is provided with cylinders on the outer side of the corresponding sliders to drive the sliders on the same side to move.

[0011] Furthermore, a liftable positioning plate is provided at the bottom of the box between the clamping housing and the annular scissors. The upper end of the positioning plate is provided with a V-shaped groove. When the slider moves, the positioning plate is raised and lowered under the action of the linkage mechanism.

[0012] Furthermore, the bottom of the housing is symmetrically provided with guide rods for guiding the positioning plate to rise and fall, and the guide rods are provided with compression springs to push the positioning plate to move up and reset.

[0013] Furthermore, the linkage mechanism includes a guide block disposed at the bottom of the positioning plate, the guide block having symmetrically arranged arc-shaped ramps that slope downwards from the inside out, and both the left and right sliders having support frames, the bottom of the support frames having support wheels that cooperate with the ramps.

[0014] Furthermore, the housing is equipped with a fixed frame, and the fixed frame is equipped with a first hydraulic cylinder that drives the movable frame to move back and forth.

[0015] Furthermore, the peeling mechanism includes swing arms symmetrically arranged on the upper end of the movable frame and swinging on the movable frame. The end of the swing arm is provided with a metal brush that rotates on the swing arm. The front end of each swing arm is provided with a guide wheel. The upper end of the housing is provided with a guide groove that cooperates with the guide wheel. The guide groove includes an arc-shaped part in the middle and straight parts provided at both ends of the arc-shaped part.

[0016] Furthermore, the movable frame is provided with a guide hole, and a movable block that moves within the guide hole is provided within the guide hole. The annular scissors are installed at the front end of the movable block, and a second hydraulic cylinder that drives the movable block to move is provided on the fixed frame.

[0017] Furthermore, the side of the enclosure is provided with an inspection door.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Effective protection of the fiber core from damage: During the brushing and shearing of the shielding layer, the two clamping housings move towards each other to hold the lead wire. At this time, the two clamping housings are spliced ​​into a sleeve structure. After the peeling mechanism flips the shielding layer forward and attaches it to the outside of the clamping housing, the moving frame moves backward and resets. Then, the annular shears move forward, and the exposed fiber core penetrates into the annular shears. The front end of the annular shears cooperates with the rear end of the clamping housing to cut off the root of the shielding layer. The movement direction of the annular shears is along the fiber core axis, and the fiber core penetrates deep into the annular shears. The annular shears will not make radial contact with the fiber core, avoiding damage to the fiber core during shielding layer cutting. This effectively protects the fiber core and ensures the connection quality between the lead wire and the main line.

[0019] 2. Protect the drain wire from damage by the clamping housing: By setting a positioning plate at the bottom of the housing and a V-shaped groove at the upper end of the positioning plate, when the drain wire is placed in the positioning groove, the exposed copper core at the end of the drain wire is supported in the V-shaped groove, preventing the axis of the drain wire from deflecting and ensuring that the axis of the drain wire is parallel to the center line of the clamping housing, which can effectively prevent the drain wire from being damaged by the clamping housing.

[0020] 3. When the two sliders move towards each other, the support wheel moves from low to high on the ramp, and the positioning plate moves downward against the force of the compression spring, without interfering with the brushing and cutting operation of the brushing and cutting mechanism. When the two sliders move in opposite directions, the support wheel moves from high to low on the ramp, and the positioning plate moves upward and resets under the action of the compression spring, positioning the axis angle of the next guide line. This mechanical structure achieves the linkage between the movement of the sliders and the lifting and lowering of the positioning plate, resulting in low cost, a compact cycle, and no cycle disorder, ensuring that the brushing and cutting action of the brushing and cutting mechanism does not interfere with the positioning plate.

[0021] 4. As the moving frame moves forward, the guide wheels move within the guide groove. When the guide wheels pass through the arc-shaped section, the two swing arms swing towards each other until the metal brush contacts the shielding layer. As the guide wheels move to the straight section at the front end of the guide groove, the moving frame continues to move forward a short distance. The metal brushes lift and flip the shielding layer outward, attaching it to the outer surface of the clamping housing, thus facilitating the annular shears to cut the root of the shielding layer. The movement of the moving frame and the swing of the swing arms are linked by the guide wheels and the guide groove, eliminating the need for a separate motor and cylinder to drive the swing arm movement. This reduces cost, provides mechanical linkage, ensures high reliability, and ensures high work efficiency as the forward movement of the moving frame and the swing of the swing arms are synchronized. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the clamping mechanism of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the clamping mechanism of the present invention. Figure 2 ; Figure 4 This is a schematic diagram of the positioning plate structure of the present invention; Figure 5 This is a schematic diagram of the brush-cutting mechanism of the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the brush-cutting mechanism of the present invention. Figure 2 ; Figure 7 This is a top view of the brush-cutting mechanism of the present invention.

[0023] In the diagram: 1. Box body; 2. Clamping shell; 3. Moving frame; 4. Ring shears; 5. Opening; 6. Positioning groove; 7. Slider; 8. Connecting frame; 9. Connecting plate; 10. Cylinder; 11. Positioning plate; 12. V-groove; 13. Guide rod; 14. Compression spring; 15. Guide block; 16. Ramp; 17. Support frame; 18. Support wheel; 19. Fixing frame; 20. First hydraulic cylinder; 21. Swing arm; 22. Metal brush; 23. Guide wheel; 24. Guide groove; 25. Moving block; 26. Second hydraulic cylinder; 27. Inspection door. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0025] like Figure 1 and Figure 2As shown, a device for brushing and cutting the shielding layer of a drain wire includes a housing 1, a clamping mechanism for holding the drain wire, and a brushing and cutting mechanism for brushing and cutting the shielding layer, both disposed at the front end of the housing 1. The clamping mechanism includes clamping housings 2 symmetrically disposed at the front end of the housing 1. The two clamping housings 2 move synchronously in the same or opposite directions on the inner wall of the housing 1. The clamping housings 2 have a semi-circular sleeve structure, and the two clamping housings 2 are spliced ​​together to form a circular sleeve for clamping the drain wire. The drain wire is placed between the two clamping housings 2, and the two clamping housings 2 move towards each other to clamp the drain wire. At this time, the stripped part of the drain wire end extends into the housing, and the shielding layer is brushed and cut by the brushing and cutting mechanism to prevent axial movement of the drain wire during the brushing and cutting of the shielding layer. After the brushing and cutting is completed, the two clamping housings 2 move in opposite directions to release the drain wire, remove the drain wire, and replace it with the next drain wire for brushing and cutting.

[0026] like Figure 2 As shown, the brush-cutting mechanism includes a movable frame 3 disposed inside the housing 1 and moving within the housing 1, a stripping mechanism disposed on the movable frame 3 for stripping the shielding layer from the wire core, and a cutting mechanism for cutting the stripped shielding layer; after the clamping housing 2 clamps the lead wire, the movable frame 3 moves forward, the stripping mechanism flips the shielding layer forward and attaches it to the outside of the clamping housing 2, and the cutting mechanism performs the cutting operation in conjunction with the clamping housing 2.

[0027] like Figure 2 and Figure 3 As shown, the cutting mechanism includes annular scissors 4 that cooperate with the clamping housing 2 to cut the shielding layer. The annular scissors 4 passes through the movable frame 3 and moves within the movable frame 3.

[0028] Traditional methods use circular cutting blades to cut the shielding layer, or electro-erosion, which uses controlled voltage to achieve instantaneous high temperatures to break the shielding layer. These methods inevitably damage the fiber core. In contrast, this invention uses two clamping housings 2 that move towards each other to hold the lead wire. The two clamping housings 2 are joined to form a sleeve structure. After the peeling mechanism flips the shielding layer forward and attaches it to the outside of the clamping housings 2, the moving frame 3 moves back to its original position. Then, the annular shears 4 move forward, exposing the fiber core into the annular shears 4. The front end of the annular shears 4 engages with the rear end of the clamping housings 2 to cut the root of the shielding layer. The annular shears 4 move in the direction of the fiber core axis, and the fiber core penetrates deep into the annular shears 4. The annular shears 4 does not make radial contact with the fiber core, effectively protecting it from damage. Furthermore, compared to electro-erosion, which uses controlled voltage to achieve instantaneous high temperatures to break the shielding layer, the brush-cutting mechanism of this application does not require controlled voltage to generate instantaneous high temperatures, resulting in low energy consumption.

[0029] It should be noted that a conical surface is provided at the rear end of the outer cylindrical surface of the clamping housing 2. When the annular scissors 4 moves forward to cut the shielding layer, the front end of the annular scissors 4 contacts the conical surface to complete the cutting of the shielding layer. There is a gap between the inner wall of the annular scissors 4 and the fiber core, which can effectively ensure that the fiber core does not contact the annular scissors 4, thus providing more reliable protection for the fiber core.

[0030] like Figure 1 As shown, the front end of the housing 1 has an opening 5. The end of the guide cable is inserted into the housing 1 through the opening 5 for brushing and cutting. After brushing and cutting, the guide cable is taken out from the opening 5 for easy retrieval. The bottom of the opening 5 has a positioning groove 6 for positioning the guide cable. The positioning groove 6 is located at the clamping center point of the clamping mechanism. When the end of the guide cable is inserted into the housing 1 for brushing and cutting, the guide cable is located in the positioning groove 6. The positioning groove 6 positions the guide cable, and when the clamping mechanism clamps the guide cable, there will be no misalignment between the clamping housing 2 and the guide cable. That is, the axis of the guide cable overlaps with the center line of the circular sleeve formed by the two clamping housings 2, ensuring that the clamping housing 2 will not damage the cable.

[0031] like Figure 1 and Figure 2 As shown, sliders 7 are symmetrically arranged on the inner wall of the housing 1, centered on the positioning groove 6. The sliders 7 are slidably connected to the inner wall of the housing 1 via guide rails. The clamping housing 2 is installed on one inner end of the slider 7. Cylinders 10 are provided on the inner wall of the housing 1, located on the outer side of each corresponding slider 7, to drive the slider 7 to move. The cylinder body of the cylinder 10 is fixed to the inner wall of the housing 1, and the piston rod of the cylinder 10 is connected to the outer end of the corresponding slider 7. The movement of the slider 7 is driven by the extension and retraction of the piston rod. A connecting frame 8 is provided on one outer end of the clamping housing 2, and a connecting plate 9 is provided on one inner end of the slider 7. The connecting frame 8 and the connecting plate 9 are connected by screws. Since the diameter of the drain line is different, a clamping housing 2 of the corresponding size needs to be replaced. The screw-connected connecting frame 8 and connecting plate 9 facilitate the replacement of the clamping housing 2, improving the versatility of the equipment.

[0032] It should also be noted that the cylinder 10 mentioned above can also be replaced by a hydraulic cylinder or an electric telescopic rod. This application does not make specific limitations on this, and the best choice can be made according to the actual use.

[0033] like Figure 3 and Figure 4As shown, the bottom of the housing 1 is provided with a liftable positioning plate 11 located between the clamping housing 2 and the annular scissors 4. The upper end of the positioning plate 11 is provided with a V-shaped groove 12. When the guide wire is placed in the positioning groove 6, the exposed copper core at the end of the guide wire is supported in the V-shaped groove 12 to position the guide wire, prevent the axis of the guide wire from deflecting, and ensure that the axis of the guide wire is parallel to the center line of the clamping housing 2. When the slider 7 moves, the positioning plate 11 rises and falls under the action of the linkage mechanism. When the slider 7 is at the outermost end, the positioning plate 11 is at the top, supporting the guide wire. When the sliders 7 on both sides move towards each other, the clamping housing 2 clamps the guide wire. Under the action of the linkage mechanism, the positioning plate 11 falls, which will not interfere with the brushing and cutting mechanism to perform brushing and cutting.

[0034] like Figure 4 As shown, the bottom of the housing 1 is symmetrically provided with guide rods 13 for guiding the positioning plate 11 to rise and fall. The bottom of the positioning plate 11 is provided with a base plate, and the two guide rods 13 are located at opposite ends of the base plate. The upper ends of the guide rods 13 pass through the base plate and are slidably connected to it. A compression spring 14 is provided on the guide rods 13 to push the positioning plate 11 upwards and reset. The lower end of the compression spring 14 contacts the bottom of the housing 1, and the upper end of the compression spring 14 contacts the positioning plate 11. In the initial state, under the action of the compression spring 14, the positioning plate 11 is located at the top, placing the exposed copper core of the drain wire into the V-groove 12, thus positioning the angle of the drain wire axis.

[0035] like Figure 3 and Figure 4 As shown, the linkage mechanism includes a guide block 15 disposed at the bottom of the positioning plate 11. The guide block 15 has symmetrically arranged arc-shaped ramps 16, which slope downwards from the inside out. Support frames 17 are provided on both the left and right sliders 7. Support wheels 18 that cooperate with the ramps 16 are located at the bottom of the support frames 17. The support frames 17 are L-shaped when viewed from the side. The upper end of the vertical part of the L-shaped support frame 17 is fixed to the corresponding slider 7 by screws. The support wheels 18 are located at the rear end of the horizontal part of the support frame 17. Initially, both sliders 7 are at their outermost ends. At this time, under the action of the compression spring 14, the positioning plate 11 is at the uppermost end. When the two sliders 7 move towards each other, the support wheels 18 move from low to high on the ramp 16, and the positioning plate 11 moves downwards against the elastic force of the compression spring 14, without interfering with the brushing and cutting operation of the brushing and cutting mechanism. When the two sliders 7 move in opposite directions, the support wheels 18 move from high to low on the ramp 16, and the positioning plate 11 moves upwards under the action of the elastic force of the compression spring 14. The movement of the slider 7 and the lifting of the positioning plate 11 are linked through a mechanical structure, which is low-cost, has a compact cycle, and avoids cycle disorder, ensuring that the brushing and cutting action of the brushing and cutting mechanism does not interfere with the positioning plate 11. It should be noted that the support wheel 18 is always in contact with the upper surface of the bottom plate of the positioning plate 11 to prevent the guide rod 13 from separating from the positioning plate.

[0036] like Figure 6 As shown, the housing 1 is provided with a fixed frame 19, and the fixed frame 19 is provided with a first hydraulic cylinder 20 that drives the movable frame 3 to move back and forth. The movable frame 3 is connected to the bottom of the housing 1 through a guide rail slider. The cylinder body end of the first hydraulic cylinder 20 is installed on the fixed frame 19, and the piston rod end of the first hydraulic cylinder 20 is connected to the movable frame 3. The movable frame 3 is driven to move back and forth by the extension and retraction of the piston rod of the first hydraulic cylinder 20.

[0037] like Figure 5 and Figure 7 As shown, the peeling mechanism includes swing arms 21 symmetrically arranged on the upper end of the movable frame 3 and swinging on the movable frame 3. The end of the swing arm 21 is provided with a metal brush 22 that rotates on the swing arm 21. The end of the swing arm 21 is provided with a motor that drives the metal brush 22 to rotate. The output shaft of the motor is connected to the rotating shaft of the metal brush 22 through a coupling. The front end of each swing arm 21 is provided with a guide wheel 23. The upper end of the housing 1 is provided with a guide groove 24 that cooperates with the guide wheel 23. The guide groove 24 includes an arc-shaped part in the middle and straight parts at both ends of the arc-shaped part. The arc-shaped part is curved inward and the straight parts are in the front-back direction. In the initial state, the movable frame 3 is located at the rear end, and the guide wheel 23 is positioned at the straight section at the rear end of the guide groove 24, with the two swing arms 21 open. As the movable frame 3 moves forward, the guide wheel 23 moves within the guide groove 24. When the guide wheel 23 passes through the arc-shaped section, the two swing arms 21 swing towards each other until the metal brush 22 contacts the shielding layer. As the guide wheel 23 moves to the straight section at the front end of the guide groove 24, the movable frame 3 continues to move forward a short distance. The metal brush 22 brushes the shielding layer outward and attaches it to the outer surface of the clamping housing 2, thus facilitating the annular scissors 4 to cut the root of the shielding layer. The movement of the movable frame 3 and the swing of the swing arms 21 can be linked by the guide wheel 23 in conjunction with the guide groove 24. There is no need to set up a separate motor and cylinder to drive the swing of the swing arms 21, which is low in cost, mechanically linked, reliable, compact in cycle, and highly efficient.

[0038] like Figure 5 and Figure 6 As shown, the movable frame 3 has a guide hole, and a movable block 25 that moves within the guide hole is provided. The annular scissors 4 are installed at the front end of the movable block 25. The movable block 25 and the annular scissors 4 are connected by screws. When changing the drain line of different diameters, the annular scissors 4 of different diameters can be replaced accordingly. The fixed frame 19 is provided with a second hydraulic cylinder 26 that drives the movable block 25 to move. The cylinder body of the second hydraulic cylinder 26 is installed on the fixed frame 19, and the piston rod of the second hydraulic cylinder 26 is connected to the movable block 25. The movable block 25 is driven to move back and forth by the extension and retraction of the piston rod of the second hydraulic cylinder 26.

[0039] It should also be noted that the first hydraulic cylinder 20 and the second hydraulic cylinder 26 mentioned above can also be replaced by pneumatic cylinders or electric telescopic rods. This application does not make specific limitations on this, and the best choice can be made according to the actual use.

[0040] like Figure 1 As shown, the side of the enclosure 1 is provided with an inspection door 27. The inspection door 27 serves two purposes: first, to facilitate the inspection and maintenance of the components inside the enclosure 1; and second, to facilitate the cleaning of the shielding layer cut off inside the enclosure 1.

[0041] In the description of the present invention, it should be noted that the terms "left", "right", "up", "down", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A device for brushing and cutting the shielding layer of a drain wire, comprising a housing (1), a clamping mechanism for clamping the drain wire disposed at the front end of the housing (1), and a brushing and cutting mechanism for brushing and cutting the shielding layer, characterized in that, The clamping mechanism includes clamping shells (2) symmetrically arranged at the front end of the box (1). The two clamping shells (2) move synchronously in the same or opposite directions on the inner wall of the box (1). The two clamping shells (2) are spliced ​​together to form a circular sleeve for clamping the drain line. The brush and shear mechanism includes a movable frame (3) disposed in the housing (1) and moving within the housing (1), a stripping mechanism disposed on the movable frame (3) for stripping the shielding layer from the wire core, and a shearing mechanism for cutting the stripped shielding layer. The cutting mechanism includes an annular scissors (4) that cooperate with the clamping housing (2) to cut the shielding layer. The annular scissors (4) pass through the movable frame (3) and move within the movable frame (3).

2. The drainage wire shielding layer brushing and cutting device as described in claim 1, characterized in that, The front end of the box (1) is provided with an opening (5), and the bottom of the opening (5) is provided with a positioning groove (6) for positioning the guide line.

3. The device for brushing and cutting the shielding layer of a drainage line as described in claim 2, characterized in that, The inner wall of the box (1) is provided with sliders (7) symmetrically arranged on the left and right sides with the positioning groove (6) as the center. The sliders (7) are slidably connected to the inner wall of the box (1). The clamping shell (2) is installed on one end of the inner side of the slider (7). The inner wall of the box (1) is provided with cylinders (10) on the outer side of the corresponding slider (7) to drive the slider (7) on the same side to move.

4. The device for brushing and cutting the shielding layer of a drainage line as described in claim 3, characterized in that, The bottom of the box (1) is provided with a liftable positioning plate (11) located between the clamping shell (2) and the annular scissors (4). The upper end of the positioning plate (11) is provided with a V-shaped groove (12). When the slider (7) moves, the positioning plate (11) is raised and lowered under the action of the linkage mechanism.

5. The device for brushing and cutting the shielding layer of a drainage line as described in claim 4, characterized in that, The bottom of the housing (1) is symmetrically provided with guide rods (13) for guiding the positioning plate (11) to rise and fall, and the guide rods (13) are provided with compression springs (14) to push the positioning plate (11) to move up and reset.

6. The device for brushing and cutting the shielding layer of a drainage line as described in claim 4, characterized in that, The linkage mechanism includes a guide block (15) at the bottom of the positioning plate (11), and an arc-shaped ramp (16) is symmetrically provided on the guide block (15). The ramp (16) slopes downward from the inside out. Support frames (17) are provided on both the left and right sliders (7). Support wheels (18) that cooperate with the ramp (16) are provided at the bottom of the support frame (17).

7. The device for brushing and cutting the shielding layer of a drainage line as described in claim 1, characterized in that, The housing (1) is provided with a fixed frame (19), and the fixed frame (19) is provided with a first hydraulic cylinder (20) that drives the movable frame (3) to move back and forth.

8. The device for brushing and cutting the shielding layer of a drainage wire as described in claim 7, characterized in that, The stripping mechanism includes swing arms (21) symmetrically arranged on the upper end of the movable frame (3) and swinging on the movable frame (3). The end of the swing arm (21) is provided with a metal brush (22) that rotates on the swing arm (21). The front end of the swing arm (21) is provided with a guide wheel (23). The upper end of the box (1) is provided with a guide groove (24) that cooperates with the guide wheel (23). The guide groove (24) includes an arc-shaped part in the middle and straight parts at both ends of the arc-shaped part.

9. The device for brushing and cutting the shielding layer of a drainage wire as described in claim 7, characterized in that, The movable frame (3) is provided with a guide hole, and a movable block (25) that moves within the guide hole is provided. The annular scissors (4) are installed at the front end of the movable block (25), and a second hydraulic cylinder (26) that drives the movable block (25) to move is provided on the fixed frame (19).

10. The device for brushing and cutting the shielding layer of a drainage line as described in claim 1, characterized in that, The box (1) is provided with an inspection door (27) on its side.

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