Cable snakelike laying fixing device and laying method for high-fall terrain

Abstract

The invention belongs to the technical field of cable laying, and relates to a cable snakelike laying fixing device and laying method for a high-fall terrain. The cable fixing device comprises two corner pulley blocks, at least one vertical support is arranged between the two corner pulley blocks, the vertical support is connected with a cable clamp through an adjustable detachable connecting piece, and the cable clamp is used for fixing a cable on the vertical support. The vertical support serves as a supporting point for cable laying, and the cable can be stably fixed. In actual construction, the number of the vertical supports can be selected according to requirements. The adjustable detachable connecting piece enables the cable clamp to be flexibly adjusted according to laying requirements of a cable, and ensures that the cable is firmly clamped and cannot be damaged due to over-tightness or over-looseness. The direction of the cable can be flexibly adjusted through the corner pulley block, so that the cable is smoothly transited in a high-fall terrain, the snake width adjusting requirement can be met, stress concentration and abrasion caused by direct bending of the cable can be reduced, and safe operation of the cable is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of cable laying, and relates to a cable serpentine laying fixing device and a laying method for high-drop terrain. Background Art

[0002] In high-drop terrain, when cables are laid from top to bottom, vertical bends often generate lateral pressure due to the effects of gravity and traction. If the high-voltage cable is subjected to excessive lateral pressure, it will crush or squeeze the lead or aluminum sheath of the cable, and even damage the semiconductor, causing insulation deformation and damaging the cable.

[0003] According to the survey, currently many areas of the cable laying adopt violent laying, hard pulling and other laying methods. The construction workers have not checked the mechanical forces on the cable during laying, nor have they tested and analyzed the distribution of residual mechanical stress inside the cable. If the residual stress in the metal sheath of the cable cannot be relieved, the concentration of mechanical stress will easily accelerate the aging of the cable insulation and shorten its service life. If the laying method can be improved and the laying equipment can be optimized to reduce the mechanical stress on the cable during laying, the problem of cable laying in high-drop terrain can be solved, the overall level of cable laying construction can be improved, and the maintenance and inspection costs of the cable during operation can be effectively reduced.

[0004] In addition, during the operation of large-section high-voltage power cables, as the load current and ambient temperature change, the power cables will expand and contract due to heat, which is generally called thermal expansion and contraction. The temperature stress generated by the change of conductor temperature with the load current is very huge. The axial force of the cable can reach several tons. The cable temperature load acts on the rigid fixing clamps, cable trench brackets, cable terminal heads and intermediate heads, causing damage to the cable fixing equipment and cable accessories, posing a safety hazard to the cable operation.

[0005] The current countermeasures to eliminate cable thermal expansion and contraction include the use of split conductors, which not only reduces core loss, but also has less thermal mechanical force per unit area than other forms of conductors. In addition, the serpentine laying of cables is an effective measure to release temperature stress, which can effectively absorb the thermal expansion and contraction changes of cables caused by load changes and eliminate mechanical stress. There are two main types of serpentine layout: horizontal serpentine and vertical serpentine. In the laying process of high-drop cables, serpentine laying support is generally adopted, and the serpentine width can be appropriately increased when designing the serpentine. Metal parts can only be installed at each serpentine pitch. Traditional cable clamps are installed in a fixed manner, resulting in insufficient adjustment capacity. When the cable current carrying capacity changes or the line is redesigned, the thermal expansion and contraction force on the cable will change, which cannot meet the serpentine width adjustment requirements, is not conducive to cable laying, and even affects the safe operation and performance life of the cable.

[0006] In summary, traditional fixed cable clamps cannot meet the needs of snake amplitude adjustment. Summary of the invention

[0007] The purpose of the present invention is to provide a cable serpentine laying fixing device and laying method for high-drop terrain, so as to solve the technical problem that traditional fixed cable clamps cannot meet the serpentine width adjustment requirements. The present invention can meet the serpentine width adjustment requirements, is conducive to the efficient laying of cables, and is conducive to the safe operation of cables.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions: The invention discloses a cable serpentine laying and fixing device for high-drop terrain, comprising two sets of corner pulley blocks, at least one vertical bracket is arranged between the two sets of corner pulley blocks, and the vertical bracket is connected to a cable clamp through an adjustable and detachable connecting piece.

[0009] Furthermore, the corner pulley block includes a plurality of pulleys, and the axes of the plurality of pulleys are arranged on the same arc.

[0010] Furthermore, the plurality of pulleys are arranged at equal intervals on the same arc.

[0011] Furthermore, the central angle of the arc is greater than or equal to 90°.

[0012] Further, the adjustable and detachable connecting member includes a sliding bracket and a sliding groove provided on the vertical bracket, the sliding bracket is embedded in the sliding groove, a plurality of first sliding bracket fixing holes are provided on the vertical bracket, at least one second sliding bracket fixing hole is provided on the sliding bracket, and fixing bolts are simultaneously passed through the second sliding bracket fixing holes and the corresponding first sliding bracket fixing holes; The sliding bracket can be removably fixed to the connecting cable clamp.

[0013] Furthermore, the sliding bracket is a convex sliding block, and the sliding groove is a convex sliding groove that is tightly fitted with the outer contour of the convex sliding block, so that the convex sliding block can slide smoothly in the convex sliding groove.

[0014] Furthermore, the cable clamp includes a clamp seat and a clamp cover, the clamp seat is fixedly connected to the sliding bracket, the clamp seat and the clamp cover are detachably fixedly connected, and the clamp seat and the clamp cover are both provided with cable installation grooves.

[0015] The present invention also discloses a method for serpentine laying of cables in high-drop terrain, which uses a serpentine laying fixing device for cables in high-drop terrain, and comprises the following steps: Determine the laying direction, split the cable laying channel structure, and simplify the laying route; Conduct force analysis on traction and lateral pressure to determine serpentine laying parameters; Select the traction machine, conveyor and corner pulley block according to the serpentine laying parameters, and arrange the positions of the traction machine, conveyor, vertical support and corner pulley block according to the force analysis; Place the traction rope of the traction machine along the laying route and connect it to the cable, power it on, and complete the laying of the cable; The cables are fixed by a cable clamp, and the position of the cable clamp on the vertical bracket is adjusted by an adjustable and detachable connection.

[0016] Further, the serpentine laying parameters include turning radius, serpentine pitch and serpentine width; The turning radius is determined according to the voltage level of the laid cable, and the turning radius of the cable during operation is equal to 15 to 20 times the outer diameter of the cable.

[0017] Furthermore, in the step of selecting the traction machine, the conveyor and the corner pulley block according to the serpentine laying parameters, the radius of the arc where the axis centers of several pulleys in the corner pulley block are located is determined according to the turning radius.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention includes two groups of corner pulley blocks, at least one vertical bracket is arranged between the two groups of corner pulley blocks, and the vertical bracket is connected to the cable clamp through an adjustable and detachable connector, and the cable clamp is used to fix the cable on the vertical bracket. As a supporting point for cable laying, the vertical bracket can stably fix the cable to prevent it from sagging or swinging due to gravity. In actual construction, the number of vertical brackets can be selected according to demand. The adjustable and detachable connector enables the cable clamp to be flexibly adjusted according to the laying requirements of the cable, ensuring that the cable is firmly clamped and will not be damaged due to being too tight or too loose. The corner pulley block can flexibly adjust the direction of the cable so that it can smoothly transition in high-drop terrain, can meet the snake width adjustment requirements, is conducive to the efficient laying of the cable, and reduces the stress concentration and wear of the cable caused by direct bending. The pressure on the opposite sides of multiple rollers is balanced, which greatly reduces the contact load between the roller and the cable, greatly improves the safety of the cable and extends its service life, which is conducive to the safe operation of the cable.

[0019] 2. The corner pulley block of the present invention includes a plurality of pulleys, and the axes of the plurality of pulleys are arranged on the same arc, so that the cable can change direction smoothly when passing through the corner pulley block, which is beneficial to reduce the friction and resistance encountered by the cable during the turning process, improves the flexibility of cable transmission, and is beneficial to improve the efficiency of cable laying.

[0020] 3. The pulleys of the present invention are arranged at equal intervals on the same arc, which helps to disperse the stress generated by the cable when turning and prevent stress concentration from causing damage to the cable.

[0021] 4. The method of the present invention determines the laying direction, splits the cable laying channel structure, simplifies the laying route, is conducive to improving construction efficiency, reducing the bending and turning of the cable during the laying process, reducing the mechanical stress on the cable, and protecting the integrity and performance of the cable; performs force analysis on the traction force and the lateral pressure to determine the serpentine laying parameters. Reasonable serpentine laying parameters can reduce the resistance of the cable during the laying process, improve the laying efficiency, and reduce the construction cost; selects the traction machine, conveyor and corner pulley block according to the serpentine laying parameters, and arranges the positions of the traction machine, conveyor, vertical support and corner pulley block according to the force analysis. Reasonable equipment layout and selection can reduce obstacles and interference in the construction process and improve construction efficiency and quality; places the traction rope of the traction machine along the laying route and connects it to the cable, powers on, completes the laying of the cable, fixes the cable with a cable clamp, and adjusts the position of the cable clamp on the vertical support with an adjustable and detachable connector to ensure the serpentine width adjustment requirements. The method of the present invention is combined with a cable serpentine laying fixing device for high-drop terrain, which can realize efficient cable laying, ensure the serpentine width adjustment requirements, and is conducive to the safe operation of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a clamp device for laying cables in a vertical serpentine pattern with a high drop according to an embodiment of the present invention; Figure 2 It is a schematic diagram of a pulley block for a turning portion of a vertically laid cable with a high drop according to an embodiment of the present invention; Figure 3 A process diagram of vertically laying cables with a high drop according to an embodiment of the present invention; Figure 4 The figure is a flow chart of the method of the present invention.

[0023] Among them: 1. vertical bracket; 2. sliding bracket; 3. cable clamp; 4. sliding groove; 5. first sliding bracket fixing hole; 6. corner pulley group; 7. third cable clamp fixing hole; 8. first cable clamp fixing hole; 9. second sliding bracket fixing hole; 10. second cable clamp fixing hole; 11. pulley; 12. traction machine. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings: See also Figure 4 The present invention discloses a cable serpentine laying and fixing device for high-drop terrain, including two sets of corner pulley blocks 6. The corner pulley blocks 6 can flexibly adjust the direction of the cable to make it transition smoothly in the high-drop terrain, reducing the stress concentration and wear of the cable caused by direct bending. At least one vertical bracket 1 is arranged between the two sets of corner pulley blocks 6. The vertical bracket 1 serves as a support point for cable laying and can stably fix the cable to prevent it from sagging or swinging due to gravity. In actual construction, the number of vertical brackets 1 can be selected according to needs. See Figure 1 The vertical bracket 1 is connected to the cable clamp 3 through an adjustable and detachable connector. The cable clamp 3 is used to fix the cable on the vertical bracket 1. The adjustable and detachable connector enables the cable clamp 3 to be flexibly adjusted according to the laying requirements of the cable, ensuring that the cable is firmly clamped and will not be damaged due to being too tight or too loose. The present invention can meet the snake width adjustment requirements and is conducive to the efficient laying of the cable. The corner pulley block 6 can reduce the stress concentration and wear of the cable caused by direct bending, greatly improve the safety of the cable and extend its service life, which is conducive to the safe operation of the cable.

[0027] Embodiment 1: See also Figure 4 This embodiment discloses a cable serpentine laying and fixing device for high-drop terrain, including two sets of corner pulley blocks 6, at least one vertical bracket 1 is arranged between the two sets of corner pulley blocks 6, and the vertical bracket 1 is connected to the cable clamp 3 through an adjustable and detachable connecting piece.

[0028] Preferably, see Figure 2The corner pulley block 6 includes a plurality of pulleys 11, and the axes of the pulleys 11 are arranged on the same arc, so that the cable can change direction smoothly when passing through the corner pulley block 6, which is beneficial to reduce the friction and resistance encountered by the cable during the turning process, improve the flexibility of cable transmission, and help improve the efficiency of cable laying.

[0029] Preferably, the plurality of pulleys 11 are arranged at equal intervals on the same arc, which helps to disperse the stress generated when the cable is turned and prevent stress concentration from damaging the cable.

[0030] Preferably, the central angle corresponding to the arc is greater than or equal to 90°.

[0031] Preferably, see Figure 1 The adjustable and detachable connecting member includes a sliding bracket 2 and a sliding groove 4 provided on the vertical bracket 1, wherein the sliding bracket 2 is embedded in the sliding groove 4, a plurality of first sliding bracket fixing holes 5 are provided on the vertical bracket 1, and at least one second sliding bracket fixing hole 9 is provided on the sliding bracket 2, and fixing bolts are simultaneously inserted into the second sliding bracket fixing hole 9 and the corresponding first sliding bracket fixing hole 5; The sliding bracket 2 can detachably fix the connecting cable clamp 3 .

[0032] Preferably, the sliding bracket 2 is a convex sliding block, and the sliding groove 4 is a convex sliding groove that closely fits the outer contour of the convex sliding block, so that the convex sliding block can slide smoothly in the convex sliding groove.

[0033] Preferably, the cable clamp 3 comprises a clamp seat and a clamp cover, the clamp seat is fixedly connected to the sliding bracket 2, the clamp seat and the clamp cover are detachably fixedly connected, and both the clamp seat and the clamp cover are provided with cable installation grooves.

[0034] Preferably, the clamp seat and the clamp cover are both provided with a third cable clamp fixing hole 7 for passing a fixing bolt.

[0035] Preferably, a first cable clamp fixing hole 8 is formed on the sliding bracket 2 , and a second cable clamp fixing hole 10 corresponding to the first cable clamp fixing hole 8 is formed on the clamp seat.

[0036] Preferably, the detachable fixed connection method of the present application also includes connection methods such as snap connection and flange connection.

[0037] Embodiment 2: The schematic diagram of the structure of the clamp device for laying cables in a vertical serpentine pattern with a high drop provided in this embodiment is as follows: Figure 3 and Figure 1The device consists of a vertical bracket 1, a sliding bracket 2, a cable clamp 3, a sliding slot 4, a first sliding bracket fixing hole 5, an angle pulley block 6, a third cable clamp fixing hole 7, a first cable clamp fixing hole 8, a second sliding bracket fixing hole 9 and a second cable clamp fixing hole 10, so as to realize the function of moving the cable clamp position in the horizontal direction.

[0038] The embodiment of the clamp device for laying cables in a high-drop vertical serpentine pattern is as follows: The cable clamp 3 is a cable bracket supporting the vertical cable. The cable clamp 3 is made of stainless steel or alloy material with high hardness. The cable is placed at the middle arc of the cable clamp 3 and is clamped and fixed by fixing bolts passing through the third cable clamp fixing hole 7.

[0039] The sliding bracket 2 is connected to the cable clamp 3 via the first cable clamp fixing hole 8 and the second cable clamp fixing hole 10 .

[0040] The vertical bracket 1 is fixed to the sliding bracket 2 through the first sliding bracket fixing hole 5 and the second sliding bracket fixing hole 9. By selecting the first sliding bracket fixing holes at different horizontal positions on the vertical bracket 1 and cooperating with the second sliding bracket fixing holes 9 on the sliding bracket 2, the change of different serpentine widths in the horizontal direction during the vertical serpentine cable laying process can be achieved.

[0041] During cable laying, basic construction is carried out according to the actual situation. By adjusting the cable tension, the cable is coiled on the bracket to keep a certain tension during the laying process to compensate for the height difference. At the cable bend, multiple linear pulleys 11 are arranged at equal intervals to form a 90° arc. The multiple pulleys 11 of the corner pulley group are evenly distributed at an angle, see Figure 2 , the angle between the line connecting two adjacent pulleys 11 and the center of the circle is In the vertical laying of cables, high-drop laying requires the use of conveyors and support frames, and the use of angle pulley blocks, steel pipe racks and other related mechanical equipment. The cable is laid from top to bottom using a traction machine 12.

[0042] See also Figure 4 Based on the above structure, the present invention also discloses a method for serpentine laying of cables in high-drop terrain, using a serpentine laying fixing device for high-drop terrain, comprising the following steps: S1. Determine the laying direction, split the cable laying channel structure, and simplify the laying route. According to the actual terrain and engineering requirements, the complex channel structure can be simplified into multiple small sections that are easier to construct, thereby improving construction efficiency. At the same time, simplifying the laying route is conducive to reducing the bending and turning of the cable during the laying process, reducing the mechanical stress on the cable, and protecting the integrity and performance of the cable; S2. Perform force analysis on traction and lateral pressure to determine serpentine laying parameters. Reasonable serpentine laying parameters can reduce the resistance of the cable during laying, improve laying efficiency, and reduce construction costs; S3. Select the traction machine 12, conveyor and corner pulley block according to the serpentine laying parameters, and arrange the traction machine 12, conveyor, vertical support 1 and corner pulley block according to the force analysis. Reasonable equipment layout and selection can reduce obstacles and interference during the construction process and improve construction efficiency and quality; S4. The traction rope of the traction machine 12 is placed along the laying line and connected to the cable, powered on to complete the laying of the cable; S5. Fix the cable by the cable clamp 3 and adjust the position of the cable clamp 3 on the vertical support 1 by the adjustable and detachable connecting piece.

[0043] The method of the present invention is combined with a cable serpentine laying fixing device for high-drop terrain, which can realize efficient cable laying, ensure the serpentine width adjustment requirements, and is conducive to the safe operation of the cable.

[0044] Embodiment three: See also Figure 4 This embodiment discloses a method for serpentine laying of cables for high-drop terrain, using a serpentine laying fixture for cables for high-drop terrain, and comprising the following steps: S1. Determine the laying direction, split the cable laying channel structure, and simplify the laying route; S2. Perform force analysis on traction and lateral pressure to determine serpentine laying parameters; Preferably, the serpentine laying parameters include turning radius, serpentine pitch and serpentine width; The turning radius is determined according to the voltage level of the laid cable, and the turning radius of the cable during operation is equal to 15 to 20 times the outer diameter of the cable.

[0045] S3. Select the traction machine 12, conveyor and corner pulley block according to the serpentine laying parameters, and arrange the traction machine 12, conveyor and corner pulley block position according to the force analysis; Preferably, in the step of selecting the traction machine 12, the conveyor and the corner pulley block according to the serpentine laying parameters, The radius of the arc where the axis centers of the plurality of pulleys 11 in the corner pulley block are located is determined according to the turning radius.

[0046] S4. Place the traction rope of the traction machine 12 along the laying route and connect it to the cable, turn on the power, and complete the laying of the cable.

[0047] Embodiment 4: See also Figure 4This embodiment discloses a method for laying cables in a serpentine pattern in a high-drop terrain, comprising the following steps: S1. Determine the turning radius and laying direction, split the channel structure according to the actual situation, and simplify the laying route; S2. Analyze the traction force and lateral pressure to determine the serpentine laying parameters; Preferably, the serpentine laying parameters include turning radius, serpentine pitch and serpentine width.

[0048] S3. Select the traction machine 12, conveyor and corner pulley block according to the serpentine laying parameters and the site conditions, and arrange the positions of the traction machine 12, conveyor and corner pulley block according to the force analysis; S4. Place the traction rope of the traction machine 12 along the laying route, connect it to the cable, power it on, and complete the laying of the cable.

[0049] When using the above method, first determine the turning radius according to the voltage level of the cable. The turning radius of the cable during operation should be strictly controlled at 15 to 20 times the outer diameter of the cable. Secondly, the laying direction of the cable should be from high to low, from horizontal to curved. Therefore, the method of laying from top to bottom should be adopted in high-drop laying. In actual situations, the laying route of high-drop is generally "Z"-shaped, so the laying line can be divided into three parts: horizontal well, curved well and vertical well.

[0050] In horizontal well laying, the main forces are traction and lateral pressure; in curved well laying, the main forces are traction, lateral pressure and gravity; in vertical well laying, the main forces are gravity and lateral pressure. During the laying process, the curved part of the cable is subject to the greatest lateral pressure. Setting a pulley block at the vertical turn during cable laying can change the point-like force into an umbrella-like force, that is, arranging multiple linear pulleys at equal intervals into a 90° arc.

[0051] A further improvement of the present invention is that the cable clamp is mounted on a slidably matched vertical bracket 1, the size of the cable clamp 3 is determined according to the actual engineering situation, the sliding bracket 2 and the vertical bracket 1 can be slidably matched and fixed by bolts, so as to achieve the adjustment of different serpentine widths in the horizontal direction when the cable is laid vertically in a serpentine shape. The sliding bracket 2 and the vertical bracket 1 are made of a hard alloy material, which is generally consistent with the cable clamp.

[0052] A further improvement of the present invention is that the channel structure is split according to actual conditions, the laying route is simplified, the traction force and lateral pressure are analyzed, the laying parameters are determined, and a pulley block is set at the vertical turn to change the traditional point-shaped force into an umbrella-shaped force, so that the tearing caused by its own gravity is extremely small.

[0053] In summary, the present invention adopts a sliding form to meet the requirements of different serpentine widths when the cable is laid vertically in a serpentine manner, ensures that the serpentine laying needs to be adjusted according to the operating conditions during the actual engineering process, reduces the line maintenance cost, and proposes to arrange a pulley block at the cable turning point to change the traditional point-shaped force into an umbrella-shaped force, thereby reducing the risk of failure of the corrugated aluminum sheath caused by excessive lateral pressure between the cable and the roller at the right-angle turn. The multi-roller combination measure adopted in the optimized construction plan greatly improves the cable stress concentration problem at the roller. Multiple rollers balance the lateral pressure, greatly reducing the contact load between the roller and the cable, greatly improving the safety of the cable and extending its service life.

[0054] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A cable serpentine laying fixture for high-drop terrain, characterized in that: It comprises two groups of corner pulley blocks (6), at least one vertical bracket (1) is arranged between the two groups of corner pulley blocks (6), and the vertical bracket (1) is connected to the cable clamp (3) via an adjustable and detachable connecting piece.

2. A cable serpentine laying and fixing device for high-drop terrain according to claim 1, characterized in that: The corner pulley block (6) comprises a plurality of pulleys (11), and the axes of the plurality of pulleys (11) are arranged on the same circular arc.

3. A cable serpentine laying and fixing device for high-drop terrain according to claim 2, characterized in that: The plurality of pulleys (11) are arranged at equal intervals on the same circular arc.

4. A cable serpentine laying and fixing device for high-drop terrain according to claim 2 or 3, characterized in that: The central angle of the arc is greater than or equal to 90°.

5. The cable serpentine laying and fixing device for high-drop terrain according to claim 1, characterized in that: The adjustable and detachable connecting member comprises a sliding bracket (2) and a sliding groove (4) provided on the vertical bracket (1), the sliding bracket (2) being embedded in the sliding groove (4), a plurality of first sliding bracket fixing holes (5) being provided on the vertical bracket (1), at least one second sliding bracket fixing hole (9) being provided on the sliding bracket (2), and fixing bolts are simultaneously inserted into the second sliding bracket fixing holes (9) and the corresponding first sliding bracket fixing holes (5); The sliding bracket (2) can detachably fix the connecting cable clamp (3).

6. The cable serpentine laying and fixing device for high-drop terrain according to claim 5, characterized in that: The sliding bracket (2) is a convex sliding block, and the sliding groove (4) is a convex sliding groove that fits tightly with the outer contour of the convex sliding block, so that the convex sliding block can slide smoothly in the convex sliding groove.

7. A cable serpentine laying and fixing device for high-drop terrain according to claim 1 or 5, characterized in that: The cable clamp (3) comprises a clamp seat and a clamp cover, wherein the clamp seat is fixedly connected to the sliding bracket (2), the clamp seat and the clamp cover are detachably fixedly connected, and a cable installation groove is provided on the clamp seat and the clamp cover.

8. A method for laying cables in a serpentine pattern in high-drop terrain, characterized in that: The cable serpentine laying and fixing device for high-drop terrain according to any one of claims 1 to 7 comprises the following steps: Determine the laying direction, split the cable laying channel structure, and simplify the laying route; Conduct force analysis on traction and lateral pressure to determine serpentine laying parameters; Selecting a traction machine (12), a conveyor, and a corner pulley block according to the serpentine laying parameters, and arranging the positions of the traction machine (12), the conveyor, the vertical support (1), and the corner pulley block according to the force analysis; The traction rope of the traction machine (12) is placed along the laying route and connected to the cable, and powered on to complete the laying of the cable; The cable is fixed by the cable clamp (3), and the position of the cable clamp (3) on the vertical support (1) is adjusted by the adjustable and detachable connecting piece.

9. A method for serpentine laying of cables in high-drop terrain according to claim 8, characterized in that: The serpentine laying parameters include turning radius, serpentine pitch and serpentine width; The turning radius is determined according to the voltage level of the laid cable, and the turning radius of the cable during operation is equal to 15 to 20 times the outer diameter of the cable.

10. The method for serpentine laying of cables for high-drop terrain according to claim 8, characterized in that: In the step of selecting a traction machine (12), a conveyor and a corner pulley block according to the serpentine laying parameters, the radius of the arc where the axis centers of the plurality of pulleys (11) in the corner pulley block are located is determined according to the turning radius.

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