A kind of auxiliary lifting equipment for tunnel cable maintenance

Abstract

The application discloses a kind of auxiliary lifting equipment for tunnel cable maintenance, it is related to the field of tunnel cable maintenance, it includes bracket rotationally installed in the side of lifting plate, the bracket top is equipped with the sliding assembly of being fixedly connected with mounting plate and driving mounting plate to slide transversely on its top, one end of the mounting plate top is fixedly installed with U-shaped fixed seat, U-shaped movable seat is slidably installed in the top center of the mounting plate, the bottom of the U-shaped movable seat is fixedly provided with magnet sliding block, the mounting plate top is equipped with the sliding groove three of being compatible with the shape of magnet sliding block, the magnet sliding block is located in sliding groove three and realizes transverse sliding, electromagnet one and electromagnet two are fixedly installed respectively in the position of sliding groove three both sides in the inside of the mounting plate. The device can lift two cables simultaneously, and the maintenance work of tunnel cable can be better carried out, the effect of stable lifting of cable is achieved, and the applicability of the device is improved.

Description

Technical Field

[0001] This application relates to the field of tunnel cable maintenance, and in particular to an auxiliary lifting device for tunnel cable maintenance. Background Technology

[0002] After long-term operation, tunnel cables frequently experience issues during maintenance, such as damaged or broken outer insulation layers and cable detachment. These issues necessitate unplanned power outages for maintenance, significantly reducing power supply reliability and service quality, and impacting business profitability. Cable maintenance requires elevating the cables from the cable trays for easier operation. However, elevating cables, especially those in the middle and upper sections of the cable trays, is extremely difficult due to the lack of support points at the bottom to accommodate lifting equipment. Therefore, an auxiliary lifting device is proposed to assist in tunnel cable maintenance.

[0003] For example, Chinese patent publication number CN118515216B discloses an auxiliary lifting device for tunnel cable maintenance, but it still has the following shortcomings in actual use:

[0004] The aforementioned device, which uses a fixed platform and a moving platform in conjunction, can only cover and lift one cable. However, most cables are now laid on cable supports in tunnels, and sometimes two cables are laid side by side on a cable support. The aforementioned device can only lift one cable, leaving the other cable unlifted. When the lifted cable is being inspected, the unlifted cable may interfere with the maintenance work of the staff. Furthermore, the diameter of cables laid in different tunnels may vary, and the aforementioned device cannot flexibly adjust the aperture of the covering structure composed of the fixed platform and the moving platform according to the cable diameter, resulting in low applicability. Summary of the Invention

[0005] To address the issue that an unlifted cable might hinder maintenance work and that the aperture of the sheathing structure cannot be flexibly adjusted according to the cable diameter, this application provides an auxiliary lifting device for tunnel cable maintenance.

[0006] The auxiliary lifting device for tunnel cable maintenance provided in this application adopts the following technical solution:

[0007] An auxiliary lifting device for tunnel cable maintenance includes a bracket rotatably mounted on one side of a lifting plate. The top of the bracket is provided with a sliding assembly that is fixedly connected to the mounting plate and drives the mounting plate to slide laterally on its top. The sliding assembly includes a driving bevel gear rotatably mounted inside the bracket for driving a driven bevel gear meshing with it to rotate. The driven bevel gear is rotatably mounted on one end of a lead screw via a rotating shaft.

[0008] A U-shaped fixed seat is fixedly installed at one end of the top of the mounting plate, and a U-shaped movable seat is slidably installed in the center of the top of the mounting plate. A magnetic slider is fixedly installed at the bottom of the U-shaped movable seat. A groove three is opened on the top of the mounting plate to match the shape of the magnetic slider. The magnetic slider is located in the groove three and can slide laterally. Electromagnet one and electromagnet two are fixedly installed on both sides of the groove three inside the mounting plate.

[0009] Both the U-shaped fixed seat and the U-shaped movable seat have annular grooves inside. A movable clamping plate assembly is provided in the annular groove. The movable clamping plate assembly includes a fan-shaped ring that is slidably installed in the annular groove. Several inclined rollers are rotatably installed on the outer circumference of the fan-shaped ring. Both the U-shaped fixed seat and the U-shaped movable seat have an electric push rod 1 whose output shaft is slidably installed on one side of the fan-shaped ring. The side of the fan-shaped ring has a sliding groove 7 that matches the shape of the electric push rod 1.

[0010] A clamping ring is slidably mounted on one end of the fan-shaped ring. A cavity is formed inside the end of the fan-shaped ring near the clamping ring. A limiting component is provided in the cavity to restrict the clamping ring from sliding longitudinally at one end of the fan-shaped ring. The limiting component includes a friction block located in the cavity and enabling lateral sliding.

[0011] By adopting the above technical solution, the U-shaped fixed seat and the movable clamping plate assembly inside it cooperate to fix and clamp one cable, and the U-shaped movable seat and the movable clamping plate assembly inside it cooperate to fix and clamp another cable. The two cables can be fixed and lifted at the same time, which facilitates the maintenance of the cables by the staff.

[0012] Preferably, slider one and slider two are symmetrically fixedly installed on both sides of the bottom of the mounting plate. The top of the bracket has grooves one and two that are adapted to the shape of slider one and slider two. Slider one and slider two are located in grooves one and two respectively and slide laterally. A sliding rod is fixedly connected between the two sides of the inner cavity of groove one. Screw one is rotatably connected between the two sides of groove two. Slider one is slidably installed on the surface of the sliding rod. Slider two is threadedly connected to the surface of screw one. Rotary grooves one and two are connected inside the bracket. The driven bevel gear is located in rotary groove one and rotates. The driving bevel gear is rotatably installed at the bottom of the inner cavity of rotary groove two. The driven bevel gear meshes with the driving bevel gear. A motor one with an output shaft that movably passes through the side wall of the bracket and is fixedly connected to the top of the driving bevel gear is fixedly connected to the top of the bracket.

[0013] By adopting the above technical solution, motor one provides kinetic energy for the rotation of the active bevel gear, causing the active bevel gear to rotate. The driven bevel gear meshes with the active bevel gear, thereby driving the driven bevel gear to rotate. This indirectly drives the lead screw one, which is fixed to one end of the driven bevel gear, to rotate. The slider two, which is threaded onto the surface of the lead screw one, slides in the slide groove two. The mounting plate of slider one and slide rod achieves smooth lateral sliding on the top of the bracket.

[0014] Preferably, the magnetic slider and the electromagnets located on its two sides repel each other.

[0015] By adopting the above technical solution, the magnetic slider and the electromagnets 1 and 2 located on both sides of it repel each other when energized. The magnetic strength of the two electromagnets is controlled by adjusting the current of the two electromagnets. When the magnetism of one electromagnet increases, it will generate a stronger repulsive force on the magnetic slider, thereby changing the position of the magnetic slider. The position of the magnetic slider can be precisely adjusted according to the spacing of the two cables, thereby adjusting the size of the distance between the U-shaped fixed seat and the U-shaped movable seat.

[0016] Preferably, the surface of the fan-shaped ring is in contact with one side of the annular groove.

[0017] By adopting the above technical solution, the generation of misalignment is avoided, and the shaking of the sector-shaped ring when it rotates and moves within the annular groove is prevented.

[0018] Preferably, the surface of the roller abuts against one side of the annular groove.

[0019] By adopting the above technical solution, the electric actuator drives the fan-shaped ring to slide laterally in the annular groove. During the sliding process of the fan-shaped ring, the roller will roll along the surface of the annular groove. Since the roller is set at an angle, it will generate a force (i.e., friction component) perpendicular to the sliding direction when it rolls. This force will cause the fan-shaped ring to rotate. At the same time, the surface of the roller abuts against one side of the annular groove to avoid play and increase the friction between the roller and the surface of the annular groove.

[0020] Preferably, a slider three is fixedly connected to one side of the clamping ring, and a groove four that matches the shape of the slider three is opened on one side of the fan-shaped ring. The slider three is located in the groove four and can slide longitudinally.

[0021] By adopting the above technical solution, the toothed ring achieves stable longitudinal sliding under the sliding cooperation of slider three and groove four, avoiding deviation.

[0022] Preferably, the cavity one is connected to the slide groove four, and the friction block abuts against the side of the slider three on the side of the slider three.

[0023] By adopting the above technical solution, the side of the friction block closest to the slider three abuts against the side of the slider three, avoiding the generation of play, increasing the friction between the side of the friction block and the side of the slider three, preventing the slider three from sliding in the slide groove four, and achieving the limitation of the clamping ring.

[0024] Preferably, a spring is fixedly connected to one side of the friction block and the other end is fixedly connected to the side of the inner cavity of the cavity. A right-angled triangular groove is formed on the top of the friction block. A sliding groove five is formed on the outer surface of the fan-shaped ring corresponding to the position of the right-angled triangular groove. A push rod body with its bottom end extending into the right-angled triangular groove is slidably installed in the sliding groove five. A connecting plate is fixedly connected to the side of the push rod body. A sliding groove six with a shape adapted to the connecting plate is formed in the fan-shaped ring. A spring two with its bottom end fixed to the bottom of the inner cavity of the sliding groove six is ​​fixedly connected to the bottom of the connecting plate.

[0025] By adopting the above technical solution, by pushing the push rod, the push rod applies the thrust to the inclined surface of the right-angled triangular groove of the friction block. Through force decomposition, it can be seen that the friction block will be subjected to a force in the direction of slide groove five. As a result, the friction block slides into slide groove five and squeezes spring one at the same time, so that the side of the friction block no longer abuts against the side of the slider three. Then there is no longer any friction between them, so that the clamping ring can slide longitudinally on the end face of the fan-shaped ring. The height of the clamping ring can be flexibly adjusted according to the size of the cable diameter.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. A U-shaped fixed base, in conjunction with a movable clamping plate assembly inside, securely clamps one cable. A U-shaped movable base, also in conjunction with the movable clamping plate assembly inside, securely clamps another cable. Both cables can be simultaneously secured and raised, facilitating cable maintenance. A magnetic slider fixedly installed at the bottom of the U-shaped movable base repels two electromagnets located on either side of it. The strength of the electromagnets' magnetism is controlled by adjusting the current to electromagnets one and two. When the magnetism of one electromagnet increases, it generates a stronger repulsive force on the magnetic slider, thus changing the position of the magnetic slider. The position of the magnetic slider can be precisely adjusted according to the spacing between the two cables, thereby adjusting the position of the U-shaped fixed base and the U-shaped movable base. The size of the spacing between the movable seats is determined by the electric actuator, which drives the fan-shaped ring to slide laterally within the annular groove. As the fan-shaped ring slides, the rollers roll along the surface of the annular groove. Because the rollers are tilted, they generate a force perpendicular to the sliding direction (i.e., a frictional component) during rolling. This force causes the fan-shaped ring to rotate. When the fan-shaped ring slides to one end of the annular groove, it rotates 100° simultaneously. At this point, the clamping ring is positioned at the top of the cable. Under the sliding cooperation of slider three and groove four, the clamping ring slides longitudinally on the end face of the fan-shaped ring. The spacing between the clamping ring and the U-shaped fixed seat and the U-shaped movable seat can be flexibly adjusted according to the cable diameter, allowing for the clamping and fixing of cables of different sizes and improving the applicability of the device. Attached Figure Description

[0028] Figure 1 This is a left view of the overall structure of this application;

[0029] Figure 2 This is a schematic diagram of the overall structure of this application;

[0030] Figure 3 This is a schematic diagram of the sliding component structure of this application;

[0031] Figure 4 This is a left cross-sectional view of the sliding component structure of this application;

[0032] Figure 5 This is a left cross-sectional view of the bracket structure of this application;

[0033] Figure 6 The left view shows the structure of electromagnet 1, electromagnet 2, magnetic slider and slide groove 3 inside the mounting plate of this application;

[0034] Figure 7 This is a left view of the internal structure of the U-shaped fixing seat in this application.

[0035] Figure 8 This is a schematic diagram of the movable clamping plate assembly structure of this application;

[0036] Figure 9This is a schematic cross-sectional view of the movable clamping plate assembly of this application;

[0037] Figure 10 for Figure 9 Enlarged schematic diagram of the structure at point A in the middle.

[0038] Reference numerals: 1. Bracket; 2. Mounting plate;

[0039] 3. Sliding assembly; 31. Slide groove one; 32. Slide rod; 33. Slide groove two; 34. Lead screw one; 35. Slider one; 36. Slider two; 37. Motor one; 38. Driving bevel gear; 39. Driven bevel gear; 310. Rotating shaft; 311. Rotating groove one; 312. Rotating groove two;

[0040] 4. U-shaped fixed seat; 5. U-shaped movable seat; 6. Annular groove;

[0041] 7. Moving clamping plate assembly; 71. Fan-shaped ring; 72. Roller; 73. Clamping ring; 74. Electric push rod one; 75. Slide groove seven; 76. Slide groove four; 77. Slider three;

[0042] 78. Limiting component; 781. Friction block; 782. Spring 2; 783. Spring 1; 784. Right-angled triangular groove; 785. Push rod body; 786. Slide groove 5; 787. Connecting plate; 788. Slide groove 6;

[0043] 8. Wall-mounted assembly; 9. Rotary groove three; 10. Lifting plate; 11. Lead screw two; 12. Motor two; 13. Top support; 14. Bottom support; 15. Guide rod; 16. Chassis; 17. Support leg; 18. Caster wheel; 19. Support column; 20. Cavity one; 21. Slide groove three; 22. Magnetic slider; 23. Electromagnet one; 24. Electromagnet two; 25. Mounting base one; 26. Electric actuator two; 27. Mounting base two. Detailed Implementation

[0044] The following is in conjunction with the appendix Figure 1 - Figure 10 This application will be described in further detail.

[0045] This application discloses an auxiliary lifting device for tunnel cable maintenance.

[0046] Reference Figure 1 - Figure 6An auxiliary lifting device for tunnel cable maintenance includes a bracket 1, a lifting plate 10 with a rotating groove 3 9 on one side, a rotating rod 1 fixedly connected between the left and right sides of the inner cavity of the rotating groove 3 9, one end of the bracket 1 rotatably mounted on the surface of the rotating rod 1, a mounting seat 1 25 fixedly mounted at the center of the bottom of the lifting plate 10 near the bracket 1, a mounting seat 27 fixedly mounted at the center of the bottom of the bracket 1, rotating rods 2 2 fixedly connected between the inner cavities of mounting seat 1 25 and mounting seat 2 27, two connecting blocks fixedly connected to both ends of an electric push rod 26, two connecting blocks rotatably mounted on the surfaces of two rotating rods 2 respectively, and through holes adapted to the shape of guide rods 15 through the top of the lifting plate 10 near the four corners, four guide rods 15 slidably mounted in the four through holes respectively, lifting... A threaded hole is drilled through the center of the top of plate 10. A second lead screw 11 is threaded into the threaded hole. Top supports 13 and bottom supports 14 are fixedly connected to the top and bottom of four guide rods 15, respectively. The top of the second lead screw 11 is rotatably mounted at the center of the bottom of top support 13, and the bottom of the second lead screw 11 is rotatably mounted at the center of the top of bottom support 14. A second motor 12 is fixedly mounted at the center of the top of top support 13. The output shaft of the second motor 12 movably passes through the side plate of top support 13 and is fixedly connected to the center of the top of the second lead screw 11. A support column 19 is fixedly connected to the center of the bottom of bottom support 14. A chassis 16 is fixedly mounted at the end of support column 19 away from bottom support 14. Support legs 17 are fixedly mounted near the four corners of the bottom of chassis 16. Universal wheels 18 are fixedly mounted at the bottom of each of the four support legs 17. (Sliding assembly) 3. The sliding assembly 3 is located between the bracket 1 and the mounting plate 2. It includes a drive bevel gear 38 rotatably installed in the bracket 1 to drive the driven bevel gear 39 that meshes with it. Slide grooves 31 and 33, which are adapted to the shapes of slider 1 35 and slider 2 36, are respectively opened on the left and right sides of the top of the bracket 1, and slide grooves 31 and 33 are symmetrically arranged. A sliding hole adapted to the shape of slide rod 32 is opened through the center of the side of slider 1 35. Slide rod 32 is slidably installed in the sliding hole and its two ends are respectively fixedly installed in the center of the left and right sides of the inner cavity of slide groove 1 31. A threaded hole adapted to the shape of lead screw 34 is opened on the side of slider 2 36. Lead screw 34 is threaded in the threaded hole and its two ends are respectively rotatably connected to the center of the left and right sides of the inner cavity of slide groove 2 33. Slider 1 35 and slider 2 36 are located in slide groove 1 31 and slide groove 2 33 respectively and slide laterally. Mounting plate 2 is fixedly installed on the top of slider 1 35 and slider 2 36. A wall-mounting component 8 (existing technology, included in Chinese patent announcement number CN118515216B) is fixedly installed on the side of mounting plate 2 away from lifting plate 10. A connecting rotating groove 1 311 and rotating groove 2 312 are opened inside bracket 1 near the end of lifting plate 10. An active bevel gear 38 is rotatably mounted at the center of the bottom of rotating groove 2 312. A motor 1 37 is fixedly installed on the top of bracket 1 at the position corresponding to the active bevel gear 38. The output shaft of motor 1 37 movably passes through the side wall of bracket 1 and is fixedly connected to the center of the top of the active bevel gear 38.A driven bevel gear 39, meshing with the driving bevel gear 38, is rotatably mounted in the center of the inner cavity of the rotating groove 311 on the side away from the driving bevel gear 38. A rotating shaft 310 is fixedly connected to the center of the driven bevel gear 39 on the side away from the driving bevel gear 38. The end of the rotating shaft 310 away from the driven bevel gear 39 movably passes through the side wall of the bracket 1 and is fixedly connected to the center of one end of the lead screw 34. A U-shaped fixed seat 4 is fixedly mounted on the top of the mounting plate 2 near the lifting plate 10. A sliding groove 3 21, whose shape matches the magnetic slider 22, is opened in the center of the top of the mounting plate 2. The magnetic slider 22 is fixedly mounted in the center of the bottom of the U-shaped movable seat 5, and the U-shaped movable seat 5 slides laterally on the top of the mounting plate 2 through the magnetic slider 22 sliding within the sliding groove 3 21.

[0047] Workers use casters 18 to move the auxiliary lifting device into the tunnel and close to the cable. Electric actuator 26 extends, causing bracket 1 to rotate until it is parallel to lifting plate 10. Then, motor 212 is started, its output shaft rotates, which in turn drives screw 211, fixedly connected to the output shaft of motor 212, to rotate. Screw 211's rotation moves lifting plate 10, threaded onto its surface, to the outside of the cable circumference, thus moving bracket 1 to the position below the cable. Then, motor 37 is started, causing the drive bevel gear 38, fixedly connected to its output shaft, to rotate clockwise. Since driven bevel gear 39 meshes with drive bevel gear 38, it rotates counterclockwise within slot 311. Screw 311... 4 is fixedly connected to the driven bevel gear 39 through the rotating shaft 310, indirectly driving the lead screw 34 to rotate. The rotation of the lead screw 34 drives the slider 36, which is threaded to its surface, to slide in the slide groove 33. At the same time, the sliding cooperation of the slider 35, the slide rod 32 and the slide groove 31 drives the mounting plate 2 to slide away from the lifting plate 10 on the top of the bracket 1, so that the U-shaped fixed seat 4 slides to correspond to a cable away from the wall. Then, the position of the U-shaped movable seat 5 is adjusted so that the U-shaped movable seat 5 corresponds to a cable close to the wall. Then, the motor 12 is started again, so that the U-shaped fixed seat 4 and the U-shaped movable seat 5 are raised, so that the bottom surface of the cable abuts against the top arc surface of the U-shaped fixed seat 4 and the U-shaped movable seat 5, thus achieving the purpose of lifting the cable.

[0048] Reference Figure 6 The mounting plate 2 has mounting cavities on both sides of the slide groove 21. Electromagnet 1 23 and electromagnet 24 are fixedly installed at the bottom of the two mounting cavities respectively. The S or N pole of electromagnet 1 23 is opposite to the S or N pole of the magnetic slider 22, and the N or S pole of electromagnet 24 is opposite to the N or S pole of the magnetic slider 22.

[0049] Due to the repulsion between like poles, the magnetic slider 22 and electromagnets 23 and 24 repel each other. The strength of the magnets can be controlled by adjusting the current of the two electromagnets. When the magnetism of one electromagnet increases, it will generate a stronger repulsive force on the magnetic slider 22, thereby changing the position of the magnetic slider 22. The position of the magnetic slider 22 can be precisely adjusted according to the spacing between the two cables, thereby adjusting the distance between the U-shaped fixed seat 4 and the U-shaped movable seat 5.

[0050] Reference Figure 7 - Figure 8 The annular grooves 6 are all formed inside the U-shaped fixed seat 4 and the U-shaped movable seat 5, and one side of the annular groove 6 extends to the top side of the U-shaped fixed seat 4 and the U-shaped movable seat 5. That is, the annular groove 6 is a U-shaped annular groove with one end open and the other end closed. The two movable clamping plate assemblies 7 are respectively set in the U-shaped fixed seat 4 and the U-shaped movable seat 5. The movable clamping plate assembly 7 includes a fan-shaped ring 71 that is slidably installed in the annular groove 6. The outer circumference of the fan-shaped ring 71 is provided with several inclined grooves. Rollers 72 are rotatably installed between the two sides of the inner cavity of the several inclined grooves. The several rollers 72 are arranged in a ring with equal spacing. The inner circumference of the fan-shaped ring 71 abuts against the side of the annular groove 6 away from the rollers 72 to avoid play and prevent the fan-shaped ring 71 from shaking when sliding and rotating in the annular groove 6. The inner circumference of the fan-shaped ring 71 and the side of the annular groove 6 away from the rollers 72 are provided with a lubricating coating to reduce the friction between them. This makes it easier for the fan-shaped ring 71 to rotate within the annular groove 6. The surfaces of several rollers 72 abut against the sides of the annular groove 6, and the sides of several rollers 72 that abut against the annular groove 6 and the rollers 72 are coated with silicone oil. The silicone oil can form a coating on the friction surface, increasing the friction between them. The U-shaped fixed seat 4 and the U-shaped movable seat 5 each have an installation cavity on one side of the center that communicates with the annular groove 6. An electric actuator 74 is fixedly installed at the bottom of the installation cavity. A sliding groove 75 that matches the shape of the output shaft of the electric actuator 74 is opened on one side of the fan-shaped ring 71. The output shaft of the electric actuator 74 extends into the sliding groove 75 after passing through the installation cavity and slides. A sliding groove 4 76 that matches the shape of the slider 3 77 is opened at one end of the fan-shaped ring 71 near the opening of the annular groove 6. The slider 3 77 is slidably installed in the sliding groove 4 76 and a clamping ring 73 is fixedly installed on the side away from the fan-shaped ring 71.

[0051] When the cable is placed on the arc-shaped surface at the top of the U-shaped fixed seat 4 and the U-shaped movable seat 5, the electric actuator 74 is activated. The electric actuator 74 drives the fan-shaped ring 71 to slide laterally within the annular groove 6. During the sliding of the fan-shaped ring 71, the rollers 72 roll along the surface of the annular groove 6. Because the rollers 72 are inclined, they generate a force perpendicular to the sliding direction (i.e., a frictional component) during rolling. This force causes the fan-shaped ring 71 to rotate. Furthermore, the surfaces of several rollers 72 that contact the annular groove 6 and the sides of the rollers 72 are coated with silicone oil. The silicone oil forms a coating on the friction surface, increasing its strength. To reduce friction between the rollers, the inner circumference of the fan-shaped ring 71 and the side of the annular groove 6 away from the roller 72 are both coated with a slip-aiding coating. This reduces the friction between them, allowing the fan-shaped ring 71 to slide and rotate within the annular groove 6. This causes the fan-shaped ring 71 to rotate the clamping ring 73 to the position at the top of the cable. Then, the clamping ring 73 slides downward, bringing its inner circumference against the top of the cable surface. This clamps the cable between the top arc surface of the U-shaped fixed seat 4 and the U-shaped movable seat 5 and the inner circumference of the clamping ring 73, preventing the cable from shaking, becoming unstable, and abrading.

[0052] Reference Figure 9 , Figure 10 A cavity 20 is formed inside the fan-shaped ring 71 near one end of the clamping ring 73. A limiting component 78, which restricts the longitudinal sliding of the clamping ring 73 at one end of the fan-shaped ring 71, is disposed inside the cavity 20. The limiting component 78 includes a friction block 781 located inside the cavity 20 and enabling lateral sliding. A spring 783 is fixedly connected to the center of the side of the friction block 781 away from the slider 77. The end of the spring 783 away from the slider 77 is fixedly connected to the center of the side of the cavity 20 away from the friction block 781. A right-angled triangular groove 784 is formed at the center of the top of the friction block 781. A sliding groove 786, which is adapted to the shape of the push rod body 785, is formed on the surface of the fan-shaped ring 71. The push rod body 785 is slidably installed in the slide groove 786 corresponding to the right-angled triangular groove 784, with its bottom extending into the right-angled triangular groove 784. The top of the push rod body 785 does not extend out of the slide groove 786. The slide groove 788, which matches the shape of the connecting plate 787, is opened in the fan-shaped ring 71 and is connected to the slide groove 786. The connecting plate 787 is slidably installed in the slide groove 788, and one side of the connecting plate 787 is fixedly connected to one side of the push rod body 785. A spring 782 is fixedly connected to the center of the bottom of the connecting plate 787. The end of the spring 782 away from the connecting plate 787 is fixedly connected to the bottom of the inner cavity of the slide groove 788.

[0053] When the clamping ring 73 needs to slide down, push the push rod body 785. The push rod body 785 applies a pushing force to the inclined surface of the right-angled triangular groove 784 of the friction block 781. Through force decomposition, it can be seen that the friction block 781 will be subjected to a force in the direction of the slide groove 786. As a result, the friction block 781 slides into the slide groove 786 and simultaneously compresses the spring 783, so that the side of the friction block 781 no longer abuts against the side of the slider 77. Therefore, there is no longer any friction between them, allowing the clamping ring 73 to slide longitudinally on the end face of the fan-shaped ring 71. The clamping ring 73 can be flexibly adjusted according to the diameter of the cable. The height of the holding ring 73 can clamp cables of different sizes. After clamping, the finger pushing the push rod body 785 is released, and the push rod body 785 is no longer under force. Under the action of the second spring 782 and the connecting plate 787, the push rod body 785 returns to its original position, and then no longer pushes the friction block 781. The friction block 781 is no longer under the pushing force and returns to its original position under the action of the first spring 783, so that the side of the friction block 781 near the slider 77 abuts against the side of the slider 77. Friction is generated between them, preventing the slider 77 from sliding in the fourth groove 76, thus limiting the clamping ring 73.

[0054] Motor 1 37, electric actuator 1 74, motor 2 12, electromagnet 1 23, electromagnet 2 24 and electric actuator 2 26 are all existing technologies, and their structural principles will not be described in detail. At the same time, this device also contains a single-chip microcomputer, microprocessor, control system and other structures, which are not the main technologies and will not be described in detail.

[0055] The implementation principle of an auxiliary lifting device for tunnel cable maintenance according to an embodiment of this application is as follows: Workers move the auxiliary lifting device into the tunnel and close to the cable using casters 18. Electric actuator 26 extends, causing bracket 1 to rotate until it is parallel to lifting plate 10. Then, motor 12 is started, and its output shaft rotates, which in turn drives screw 11, fixedly connected to the output shaft of motor 12, to rotate. The rotation of screw 11 causes lifting plate 10, threaded onto its surface, to move to the outer circumference of the cable, thereby moving bracket 1 to a position below the cable. Then, under the action of sliding assembly 3, mounting plate 2 slides on top of bracket 1 away from lifting plate 10, causing U-shaped fixing seat 4 to slide to correspond to a cable away from the wall.

[0056] The strength of the magnetism of the two electromagnets is controlled by adjusting the current. When the magnetism of one electromagnet increases, it generates a stronger repulsive force on the magnet slider 22, thereby changing the position of the magnet slider 22. The position of the magnet slider 22 can be precisely adjusted according to the spacing between the two cables, thereby adjusting the distance between the U-shaped fixed seat 4 and the U-shaped movable seat 5, so that the U-shaped movable seat 5 corresponds to one of the cables closest to the wall. Then, the motor 12 is restarted, causing the U-shaped fixed seat 4 and the U-shaped movable seat 5 to rise, so that the bottom of the cable surface is aligned with the top arc of the U-shaped fixed seat 4 and the U-shaped movable seat 5. The contact surface achieves the purpose of supporting the cable. Then, the electric actuator 74 is activated, which drives the fan-shaped ring 71 to slide laterally within the annular groove 6. Under the action of the roller 72, the fan-shaped ring 71 rotates. When the fan-shaped ring 71 slides to the end of the annular groove 6, it drives the clamping ring 73 to rotate to the position at the top of the cable. Then, the actuator body 785 is pushed with a finger, and the actuator body 785 applies a pushing force to the friction block 781. The friction block 781 slides into the slide groove 786 under the force, while simultaneously squeezing the spring 783, so that the side of the friction block 781 is no longer in contact with the slider 77. When the sides abut, there is no longer any friction between them, allowing the clamping ring 73 to slide longitudinally on the end face of the fan-shaped ring 71. The height of the clamping ring 73 can be flexibly adjusted according to the cable diameter, allowing for the clamping of cables of different sizes. After clamping, the finger pushing the push rod body 785 is released, and the push rod body 785 is no longer under force. Under the action of the second spring 782 and the connecting plate 787, the push rod body 785 springs back to its original position, thus ceasing to push the friction block 781. The friction block 781 is no longer under pushing force and springs back to its original position under the action of the first spring 783, causing the friction block 781 to approach... One side of slider 3 77 abuts against the side of slider 3 77, generating friction between them to prevent slider 3 77 from sliding within slide groove 4 76, thus limiting the clamping ring 73. This clamps the cable between the top arc surface of the U-shaped fixed seat 4 and the U-shaped movable seat 5 and the inner circumference of the clamping ring 73, preventing cable swaying, instability, and wear. According to the needs of the maintenance site, motor 2 12 continues to work, causing the mounting plate 2 to drive the U-shaped fixed seat 4 and the U-shaped movable seat 5 to continue to rise, allowing both cables to be lifted simultaneously, thus better enabling the maintenance of tunnel cables and achieving the effect of stable cable lifting.

[0057] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A kind of tunnel cable maintenance auxiliary lifting equipment, including bracket being rotatably installed in the side of lifting plate, it is characterized in that: The bracket top is provided with a sliding assembly fixedly connected with the mounting plate and driving the mounting plate to slide transversely on the top of the bracket, the sliding assembly comprises a driving bevel gear rotatably installed in the bracket for driving a driven bevel gear engaged therewith to rotate, the driven bevel gear is fixedly installed at one end of the lead screw through a rotating shaft; The top of the mounting plate is fixedly provided with a U-shaped fixed seat at one end, a U-shaped movable seat is slidably installed at the center of the top of the mounting plate, a magnet sliding block is fixedly arranged at the bottom of the U-shaped movable seat, a sliding groove three matching the shape of the magnet sliding block is formed in the top of the mounting plate, the magnet sliding block is located in the sliding groove three and realizes transverse sliding, electromagnets one and two are fixedly installed at the positions on both sides of the sliding groove three in the mounting plate; The U-shaped fixed seat and the U-shaped movable seat are both provided with an annular groove, a movable clamping plate assembly is arranged in the annular groove, the movable clamping plate assembly comprises a sector ring slidably installed in the annular groove, a plurality of inclined rollers are rotatably installed on the circumferential outer surface of the sector ring, an electric push rod one is fixedly arranged in the U-shaped fixed seat and the U-shaped movable seat and slidably installed at one side of the sector ring, a sliding groove seven matching the shape of the electric push rod one is formed in the side surface of the sector ring; One end of the sector ring is slidably provided with a clamping ring, a cavity one is formed in the end of the sector ring close to the clamping ring, a limiting assembly limiting the longitudinal sliding of the clamping ring at one end of the sector ring is arranged in the cavity one, the limiting assembly comprises a friction block located in the cavity one and realizing transverse sliding; The surface of the roller abuts against one side of the annular groove, since the rollers are inclined, they will generate a force perpendicular to the sliding direction when rolling, which will make the sector ring rotate; One side of the clamping ring is fixedly connected with a sliding block three, a sliding groove four matching the shape of the sliding block three is formed in one side of the sector ring, the sliding block three is located in the sliding groove four and realizes longitudinal sliding; The cavity one is communicated with the sliding groove four, one side of the friction block close to the sliding block three abuts against the side surface of the sliding block three; One side of the friction block is fixedly connected with a spring one fixedly arranged in the cavity one, a right-angled triangular recess is formed in the top of the friction block, a sliding groove five is formed in the circumferential outer surface of the sector ring corresponding to the right-angled triangular recess, a push rod body with the bottom end extending into the right-angled triangular recess is slidably installed in the sliding groove five, a connecting plate is fixedly connected with the side surface of the push rod body, a sliding groove six matching the shape of the connecting plate is formed in the sector ring, a spring two with the bottom end fixedly arranged in the cavity bottom of the sliding groove six is fixedly arranged at the bottom of the connecting plate.

2. The auxiliary lifting device for tunnel cable maintenance according to claim 1, characterized in that: The bottom of the mounting plate is symmetrically fixed with a sliding block one and a sliding block two on both sides, the top of the bracket is provided with a sliding groove one and a sliding groove two which are matched with the sliding block one and the sliding block two, the sliding block one and the sliding block two are located in the sliding groove one and the sliding groove two respectively and realize horizontal sliding, the sliding groove one is fixed between the two sides of the inner cavity and is connected with a sliding rod, the lead screw one is rotatably connected between the two sides of the sliding groove two, the sliding block one is slidably installed on the surface of the sliding rod, the sliding block two is threadedly connected on the surface of the lead screw one, the bracket is provided with a rotating groove one and a rotating groove two which are connected and communicated, the driven bevel gear is located in the rotating groove one and rotates, the driving bevel gear is rotatably installed at the bottom of the inner cavity of the rotating groove two, the driven bevel gear is engaged with the driving bevel gear, and the top of the bracket is fixed with a motor one which is movably penetrated through the side wall of the bracket and is fixedly connected with the top of the driving bevel gear.

3. The auxiliary lifting device for tunnel cable maintenance according to claim 1, characterized in that: The magnet sliding block and the electromagnet one and the electromagnet two located on both sides of the magnet sliding block repel each other when electrified.

4. The auxiliary lifting device for tunnel cable maintenance according to claim 1, characterized in that: The surface of the fan-shaped circular ring is attached to one side of the annular groove.

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