Electric power first-aid repair cable dragging device for electric power system

Abstract

The invention discloses an electric power first-aid repair cable dragging device for an electric power system, and relates to the technical field of electric power first-aid repair. The dragging plate is hinged to the upper surface of the chassis and can independently steer, the expansion mechanism is installed on the upper surface of the dragging plate and used for adjusting the bending radius of the cable in a self-adaptive mode, and the universal wheels are symmetrically arranged at the lower end of the dragging plate and used for controlling the oil inlet amount of the expansion mechanism according to the steering amplitude. The arc-shaped plate is pushed to carry the guide pipe column to expand outwards to be away from the rotating center through steering of the universal wheels, and the bending center of the cable is located at the outer end of the guide pipe column all the time, so that the bending center of the cable can be gradually away from the rotating axis of the dragging plate along with external expansion of the guide pipe column. In other words, steering of the cable does not need to be achieved through large-radius turning of the cable dragging device, large-radius bending steering of the cable can be achieved only through in-situ steering, and the labor-saving effect with half the effort can be achieved during steering.

Description

Technical Field

[0001] The invention relates to the technical field of power emergency repair, in particular to a power emergency repair cable dragging device for a power system. Background Art

[0002] The power repair cable dragging device moves the connection by pulling the cable. During the power repair of the power system, the cable can be pulled to quickly move to the designated place, which is convenient for quick connection of the cable to ensure the normal operation of the power system. It is an indispensable tool in the maintenance and repair of the power system. It simplifies the cable handling and laying process through mechanized means and improves the efficiency and safety of power engineering operations.

[0003] For example, a cable repair and dragging device for an electric power system with publication number CN117735327A and publication date 2024-03-22 can support cables through the cooperation of a fixed frame, a connecting frame, a telescopic bracket, rollers, and an arc bracket. The dragging frame is convenient for dragging cables. When dragging, the dragging frame moves, and the fixed frame and the connecting frame remain stationary. Therefore, the cables located above the fixed frame and the connecting frame and the cables located between the dragging frame and the fixed frame will not produce friction with the ground and are in a suspended state, thereby greatly reducing the damage to the cables and increasing the practicality. The cleaning bracket and cleaning cotton are convenient for cleaning the passing cables, which can improve the cleanliness of the cables; and the fixing mechanism is convenient for fixing the cables, thereby facilitating dragging. The plug-in assembly is convenient for disassembly and assembly of the dragging frame and the fixed frame. The driving mechanism is convenient for realizing the extension and retraction of the telescopic bracket. The stabilizing mechanism is linked to the extension and retraction of the telescopic bracket. When the telescopic bracket is unfolded, the lower end of the screw is screwed into the ground, which increases the stability of the fixed frame and avoids movement during dragging.

[0004] The problems faced by the cable dragging device during power repair are not limited to cable surface damage and dust adhesion. The purpose of using the cable dragging device during power repair is to save time and effort, thereby accelerating power repair. Preventing cable surface damage and dust adhesion are incidental problems to be solved;

[0005] In fact, in the race against time for power repair, the core issue is how to improve the efficiency of cable dragging to prevent greater losses caused by delays in power repair. However, the existing technology mostly ignores this problem. The present invention mainly considers the following aspects to improve the dragging efficiency:

[0006] Most of the existing cable dragging devices can achieve high efficiency when dragging in a straight line, because straight-line dragging only needs to overcome the dragging resistance of the cable. However, the actual power repair process also involves the turning of the cable. For cables with larger diameters, the turning not only needs to overcome the dragging resistance of the cable, but also needs to overcome the tension generated inside the cable when the cable is bent. During on-site operations, experienced workers with large diameter cables will choose to use the dragging device to pull the cable head to make a large turn to achieve the turning of the cable, because the smaller the inner diameter of the turn, the greater the internal tension that needs to be overcome. If the cable is bent directly to make a small turn, on the one hand, the bending damage inside the cable is greater, and on the other hand, the resistance may be too great to bend, and there may even be a dangerous situation in which the cable bending tension is too great and the dragging device and the person are elastically reset.

[0007] In view of the above problems, the present invention proposes a labor-saving cable dragging device which realizes cable steering by turning a small bend. Summary of the invention

[0008] The technical solution of the present invention aims at the technical problem that the existing technical solutions are too single, and provides a solution that is significantly different from the existing technologies. Specifically, the purpose of the present invention is to provide a cable dragging device for power emergency repairs in power systems, so as to solve the problem that the existing cable dragging devices can mostly achieve high efficiency when dragging in a straight line, because the straight line dragging only needs to overcome the dragging resistance of the cable, but the actual power emergency repair process also involves the turning of the cable. For cables with larger diameters, the turning not only needs to overcome the dragging resistance of the cable, but also needs to overcome the tension generated inside the cable when the cable is bent. During on-site operations, experienced workers with large diameter cables will choose to use a dragging device to pull the cable head to make a large turn to achieve the turning of the cable, because the smaller the inner diameter of the turn, the greater the internal tension that needs to be overcome. If the cable is bent directly to make a small turn, on the one hand, the bending damage inside the cable is relatively large, and on the other hand, there may be a situation where the resistance is too large and the bend cannot be bent, and there may even be a dangerous situation where the bending tension of the cable is too large and the dragging device and the person are elastically reset.

[0009] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a power emergency repair cable towing device for an electric power system, comprising a chassis and universal rollers evenly distributed below the chassis, a towing plate hinged to the upper surface of the chassis and independently steerable, an expansion mechanism installed on the upper surface of the towing plate for adaptively adjusting the bending radius of the cable, and universal wheels symmetrically arranged at the lower end of the towing plate for controlling the oil intake of the expansion mechanism according to the steering amplitude, and an arc plate is fitted on the upper surface of the towing plate for adjusting the bending radius of the expansion mechanism.

[0010] Preferably, a clamping mechanism and a mounting plate are fixed in sequence in a linear arrangement on the upper surface of the drag plate, one end of the cable is bent and fixed inside the clamping mechanism, and a round tube for the cable to pass through is installed through the inside of the mounting plate.

[0011] Preferably, the expansion mechanism includes a guide rail, a slider and a guide tube column. The arc plate is provided with a guide rail inside, and the cross-section of the guide rail is an inverted T-shape. A slider is provided inside the guide rail for sliding matching, and the upper end of the slider is hinged with a guide tube column, and the cable passes through the middle groove of the guide tube column.

[0012] Preferably, a tightening spring is wound around the outer wall of the cable between the mounting plate and the guide column, one end of the tightening spring is fixed to the side wall of the mounting plate, and the other end of the tightening spring is fixed to the end of the guide column.

[0013] Preferably, hydraulic telescopic rods are symmetrically mounted on the upper surface of the towing plate, and the telescopic ends of the hydraulic telescopic rods are fixedly connected to the inner side wall of the arc-shaped plate.

[0014] Preferably, an outer oil pipe and an inner oil pipe are respectively provided on both sides of the universal wheel, and a three-way pipe is connected between the outer oil pipe, the inner oil pipe and the oil chamber of the hydraulic telescopic rod.

[0015] Preferably, an outer piston and an inner piston are respectively slidably provided inside the oil chambers of the outer oil pipe and the inner oil pipe, and the outer ends of the outer piston and the inner piston are respectively hinged with an outer pressure roller and an inner pressure roller, and the outer pressure roller and the inner pressure roller are respectively fitted and connected to both sides of the universal wheel.

[0016] Preferably, the outer oil pipe and the inner oil pipe are spatially staggered, and the outer oil pipe, the inner oil pipe and the hydraulic telescopic rod are interconnected via a three-way pipe.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] When dragging in a straight line, the two universal wheels at the lower end of the towing plate and several universal rollers at the lower end of the chassis are all facing forward. When the cable needs to be turned, the dragging is stopped and the towing plate is pulled to rotate toward the required direction at the upper end of the chassis. At this time, the directions of the multiple universal rollers at the lower end of the chassis do not change, and the two universal wheels at the lower end of the towing plate will inevitably squeeze the outer pressure roller on one side or the inner pressure roller on the other side. When the universal wheels rotate, the rotational force is used to contact and squeeze the outer pressure roller, so that the outer pressure roller drives the outer piston to contract along the oil cavity inside the outer oil pipe, thereby squeezing the oil inside the oil cavity of the outer oil pipe through the outer piston through the three-way pipe into the hydraulic telescopic rod on the corresponding side.

[0019] Similarly, when the towing board is rotated with the chassis as the axis, the two universal wheels under the towing board will rotate synchronously and inject an equal amount of oil into the hydraulic telescopic rods on both sides, so that the telescopic ends of the hydraulic telescopic rods on both sides are adaptively extended by an equal amount and push the arc plate away from the upper surface of the towing board, so that the guide column is synchronously away from the mounting plate and the tightening spring is stretched, so that the tightening spring is gradually tightened on the outer wall of the cable, which increases the towing stability of the cable on the one hand and prevents the cable between the mounting plate and the guide column from bending at a small radius during steering on the other hand;

[0020] At the same time, assuming that the position of the guide column is fixed and will not expand outward, when the towing board is rotated, the cable will bend with the end of the guide column as the axis. At this time, the bending radius is small, and the steering tension and dragging force that need to be overcome are also large. In the present invention, when the towing board is rotated, the steering of the universal wheel is used to push the arc plate to carry the guide column outward away from the rotation center, and the bending center of the cable is always at the outer end of the guide column. Therefore, the bending center of the cable will gradually move away from the rotation axis of the towing board as the guide column expands outward, that is, there is no need to realize the steering of the cable through a large radius turn of the cable towing device, and only needs to turn on the spot to realize the larger radius bending and steering of the cable, and it can achieve twice the result with half the effort when turning. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the top structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the first three-dimensional structure of the present invention.

[0023] Figure 3 It is a schematic diagram of the second three-dimensional structure of the present invention.

[0024] Figure 4 It is a schematic diagram of the third three-dimensional structure of the present invention.

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the expansion mechanism of the present invention.

[0026] Figure 6 The figure is a schematic diagram of the installation structure of the universal wheel of the present invention.

[0027] Figure 7 For the present invention Figure 4 Enlarged structural diagram at A in the middle.

[0028] Figure 8 It is a schematic diagram of the connection structure between the universal wheel and the external oil pipe of the present invention.

[0029] Fig. 9 It is a schematic diagram of the connection structure between the universal wheel and the inner oil pipe of the present invention.

[0030] Fig.10 It is a schematic diagram of the bending posture of the cable when turning according to the present invention.

[0031] In the figure: 1. chassis; 2. drag plate; 21. mounting plate; 22. arc plate; 23. guide rail; 24. slider; 25. guide column; 26. tightening spring; 3. clamping mechanism; 4. hydraulic telescopic rod; 5. universal wheel; 6. external oil pipe; 61. external piston; 62. external pressure roller; 7. internal oil pipe; 71. internal piston; 72. internal pressure roller; 8. three-way pipe. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figures 1 to 10 The present invention provides a technical solution: a power repair cable towing device for an electric power system, comprising a chassis 1 and universal rollers evenly distributed below the chassis 1, a towing plate 2 hinged to the upper surface of the chassis 1 and independently steerable, an expansion mechanism installed on the upper surface of the towing plate 2 for adaptively adjusting the bending radius of the cable, and universal wheels 5 symmetrically arranged at the lower end of the towing plate 2 for controlling the oil intake of the expansion mechanism according to the steering amplitude, and an arc plate 22 for adjusting the bending radius of the expansion mechanism is fitted on the upper surface of the towing plate 2.

[0034] The upper surface of the drag plate 2 is linearly arranged with a clamping mechanism 3 and a mounting plate 21 fixed in sequence, and one end of the cable is bent and fixed inside the clamping mechanism 3, and a round tube for the cable to pass through is installed through the inside of the mounting plate 21.

[0035] The expansion mechanism includes a guide rail 23, a slider 24 and a guide column 25. The guide rail 23 is opened inside the arc plate 22, and the cross-section of the guide rail 23 is an inverted T-shape. The slider 24 is slidingly matched inside the guide rail 23, and the upper end of the slider 24 is hinged with the guide column 25, and the cable passes through the middle groove of the guide column 25.

[0036] A tightening spring 26 is wound around the outer wall of the cable between the mounting plate 21 and the guide column 25 , and one end of the tightening spring 26 is fixed to the side wall of the mounting plate 21 , and the other end of the tightening spring 26 is fixed to the end of the guide column 25 .

[0037] The upper surface of the towing plate 2 is symmetrically mounted with hydraulic telescopic rods 4 , and the telescopic ends of the hydraulic telescopic rods 4 are fixedly connected to the inner side wall of the arc plate 22 .

[0038] An outer oil pipe 6 and an inner oil pipe 7 are respectively provided on both sides of the universal wheel 5 , and a three-way pipe 8 is connected between the outer oil pipe 6 , the inner oil pipe 7 and the oil chamber of the hydraulic telescopic rod 4 .

[0039] An outer piston 61 and an inner piston 71 are respectively slidably provided inside the oil chamber of the outer oil pipe 6 and the inner oil pipe 7, and the outer ends of the outer piston 61 and the inner piston 71 are respectively hinged with an outer pressure roller 62 and an inner pressure roller 72, and the outer pressure roller 62 and the inner pressure roller 72 are respectively fitted and connected to the two sides of the universal wheel 5.

[0040] The outer oil pipe 6 and the inner oil pipe 7 are spatially staggered, and the outer oil pipe 6 , the inner oil pipe 7 and the hydraulic telescopic rod 4 are interconnected via a three-way pipe 8 .

[0041] Working principle: When using the power system emergency repair cable towing device, first, the cable head to be towed is passed through the guide tube column 25, the tightening spring 26 and the mounting plate 21 in sequence, and the cable head is clamped and positioned on the towing plate 2 through the clamping mechanism 3, and then the cable can be dragged forward by pulling the towing device through the handle on the towing plate 2.

[0042] When dragging in a straight line, the two universal wheels 5 at the lower end of the towing board 2 and the multiple universal rollers at the lower end of the chassis 1 are all facing forward. When the cable needs to be turned, the towing is stopped and the towing board 2 is pulled to rotate toward the required direction at the upper end of the chassis 1. At this time, the directions of the multiple universal rollers at the lower end of the chassis 1 do not change, while the directions of the two universal wheels 5 at the lower end of the towing board 2 will change adaptively based on the turning, as follows:

[0043] When the universal wheel 5 rotates, Figure 7 , Figure 8 and Fig. 9 The universal wheel 5 shown in the figure will inevitably squeeze the outer pressure roller 62 on one side or the inner pressure roller 72 on the other side. The principle of squeezing the outer pressure roller 62 is described below by taking the squeezing of the outer pressure roller 62 as an example. When the universal wheel 5 rotates, the outer pressure roller 62 is squeezed by the rotational force in a contact manner, so that the outer pressure roller 62 drives the outer piston 61 to contract along the oil cavity inside the outer oil pipe 6, so that the oil inside the oil cavity of the outer oil pipe 6 is squeezed into the hydraulic telescopic rod 4 on the corresponding side through the tee pipe 8 through the outer piston 61. Fig. 9 As shown, in the initial state, the outer piston 61 and the inner piston 71 are respectively located at the extreme ends of their respective oil chambers, so when the oil inside the oil chamber of the outer oil pipe 6 is squeezed into the three-way pipe 8 through the outer piston 61, the oil will not enter the inner oil pipe 7).

[0044] Similarly, when the towing board 2 is rotated with the chassis 1 as the axis, the two universal wheels 5 under the towing board 2 will rotate synchronously and inject equal amounts of oil into the hydraulic telescopic rods 4 on both sides, so that the telescopic ends of the hydraulic telescopic rods 4 on both sides are adaptively extended by equal amounts and push the arc plate 22 away from the upper surface of the towing board 2, so that the guide column 25 is synchronously away from the mounting plate 21 and the tightening spring 26 is stretched, so that the tightening spring 26 is gradually tightened on the outer wall of the cable, which increases the towing stability of the cable on the one hand, and prevents the cable between the mounting plate 21 and the guide column 25 from bending at a small radius during the turning period on the other hand;

[0045] At the same time, assuming that the position of the guide column 25 is fixed and will not expand outward, when the towing board 2 is rotated, the cable will bend with the end of the guide column 25 as the axis, and the bending radius is small at this time, and the steering tension and dragging force to be overcome are also large. In the present invention, when the towing board 2 is rotated, the steering of the universal wheel 5 is used to push the arc plate 22 to carry the guide column 25 outward away from the rotation center, and the bending center of the cable is always at the outer end of the guide column 25. Therefore, the bending center of the cable will gradually move away from the rotation axis of the towing board 2 as the guide column 25 expands outward, that is, there is no need to realize the steering of the cable through a large radius turn of the cable towing device, and only needs to turn on the spot to realize the large radius bending and steering of the cable;

[0046] At the same time, if Fig.10 As shown, when the tow plate 2 rotates to cause the guide column 25 to expand outward, the guide column 25 can also rotate at the upper end of the slider 24, and the guide column 25 can also present a certain angle change through the engagement and sliding of the slider 24 inside the guide rail 23, so that the bending center of the cable is further away from the end of the guide column 25, thereby further increasing the bending radius of the cable to achieve a further labor-saving effect. At the same time, after understanding the working principle of the present invention based on the above process description, when the cable is dragged and turned, it is not necessary to follow the step of stopping forward and pulling the tow plate 2 to rotate in the above principle (the working principle of stopping forward and pulling the tow plate 2 to rotate is for the convenience of principle description). In actual operation, the tow plate 2 can be directly pulled for walking-style turning. The above function can also be achieved by turning while walking, and it is more efficient.

[0047] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A power repair cable dragging device for a power system, comprising a chassis (1) and universal rollers evenly distributed below the chassis (1), characterized in that: The invention also comprises a towing board (2) which is hinged to the upper surface of the chassis (1) and can be turned independently, an expansion mechanism installed on the upper surface of the towing board (2) for adaptively adjusting the bending radius of the cable, and a universal wheel (5) symmetrically arranged at the lower end of the towing board (2) for controlling the oil intake of the expansion mechanism according to the steering amplitude, and the upper surface of the towing board (2) is fitted with an arc plate (22) for adjusting the bending radius of the expansion mechanism.

2. The power repair cable dragging device for a power system according to claim 1, characterized in that: The upper surface of the drag plate (2) is fixed with a clamping mechanism (3) and a mounting plate (21) in sequence in a linear arrangement, one end of the cable is bent and fixed inside the clamping mechanism (3), and a round tube is installed through the inside of the mounting plate (21) for the cable to pass through.

3. The power repair cable dragging device for a power system according to claim 2, characterized in that: The expansion mechanism comprises a guide rail (23), a slider (24) and a guide column (25); the guide rail (23) is provided inside the arc plate (22), and the cross section of the guide rail (23) is inverted T-shaped; the guide rail (23) is provided with a slider (24) for sliding matching inside, and the upper end of the slider (24) is hinged with the guide column (25), and the cable passes through the middle groove of the guide column (25).

4. The power repair cable dragging device for a power system according to claim 3, characterized in that: A tightening spring (26) is wound around the outer wall of the cable between the mounting plate (21) and the guide tube column (25), one end of the tightening spring (26) is fixed to the side wall of the mounting plate (21), and the other end of the tightening spring (26) is fixed to the end of the guide tube column (25).

5. The power repair cable dragging device for a power system according to claim 1, characterized in that: A hydraulic telescopic rod (4) is symmetrically mounted on the upper surface of the towing plate (2), and the telescopic end of the hydraulic telescopic rod (4) is fixedly connected to the inner side wall of the arc-shaped plate (22).

6. The power repair cable dragging device for a power system according to claim 5, characterized in that: An outer oil pipe (6) and an inner oil pipe (7) are respectively provided on both sides of the universal wheel (5), and a three-way pipe (8) is connected between the outer oil pipe (6), the inner oil pipe (7) and the oil chamber of the hydraulic telescopic rod (4).

7. The power repair cable dragging device for a power system according to claim 6, characterized in that: An outer piston (61) and an inner piston (71) are respectively slidably provided inside the oil chambers of the outer oil pipe (6) and the inner oil pipe (7), and the outer ends of the outer piston (61) and the inner piston (71) are respectively hinged with an outer pressure roller (62) and an inner pressure roller (72), and the outer pressure roller (62) and the inner pressure roller (72) are respectively fitted and connected to the two sides of the universal wheel (5).

8. The power repair cable dragging device for a power system according to claim 6, characterized in that: The outer oil pipe (6) and the inner oil pipe (7) are spatially staggered, and the outer oil pipe (6), the inner oil pipe (7) and the hydraulic telescopic rod (4) are interconnected via a three-way pipe (8).

Images