Power supply cable trough for wharf port machinery

Abstract

The utility model discloses a power supply cable trough for a wharf port machine. The power supply cable trough comprises a cable trough body, an anti-damage part and an anti-fouling part, the cable trough body is arranged on the working ground below a cable reel; the anti-damage part is arranged in the cable trough body; the antifouling parts are respectively arranged at the upper end and the bottom end of the tail end of the cable trough body; a cable is placed in the damage prevention part, so that friction between the cable and the inner wall and the bottom of the cable trough body is avoided, and the cable is protected; secondly, through the cooperation of the anti-fouling component and the damage prevention component which are arranged at the upper end of the cable trough body, the part of the anti-fouling component has an automatic return function, so that the cable reel is not hindered to recycle the cable, and meanwhile, after the cable reel puts down the cable, the anti-fouling component is prevented from being damaged by the damage prevention component. The antifouling part can automatically return to a state of sealing the cable trough body, thereby preventing water flow and impurities from entering, reducing cleaning workload, and prolonging the service life of the cable.

Description

Technical Field

[0001] The embodiments of the present utility model belong to the technical field of power supply cable layout for terminal port machinery, and more specifically, relate to a power supply cable trough for terminal port machinery. Background Technique

[0002] Regarding the power supply problem of rail-mounted port machinery (port crane) operating on vertical piers, it is necessary to ensure that the moving cable can maintain a good operating state while moving with the port crane equipment. These moving cables usually have a relatively large cross-sectional area and are circular or flat in shape to be able to carry the required electrical load. However, due to their large size, directly laying them on the pier surface will cause a series of problems, including obstructing the normal passage of the pier and being vulnerable to external mechanical damage. Considering the special size of the moving cable, the traditional drag chain solution is not applicable because drag chains are usually suitable for cables with a smaller cross-sectional area, while large cables may exceed the load-bearing capacity and flexibility requirements of the drag chain.

[0003] To solve this problem, by embedding the cable in a cable trough of a suitable size and setting the cable trough on the working ground, the cable can be effectively protected from external mechanical damage. In the prior art, Chinese Patent with Document Number CN214958551U discloses a cable protection structure for a ship shore power system, including a cable trough body, the cable trough body is embedded in the ground between the shore power connection pile and the ship, and the notch of the cable trough body is flush with the ground. On the opposite sides of the left and right of the notch of the cable trough body, a number of pairs of receiving bodies and plug-in bodies are arranged. A telescopic groove is opened on the side wall of the receiving body opposite to the plug-in body, and a plug-in groove is opened on the side wall of the plug-in body relative to the receiving body. A partition that can extend or retract from the telescopic groove is arranged in the telescopic groove. One end of the partition extending out of the telescopic groove is provided with a clamping component. When the partition extends to the limit position, by embedding the cable trough body into the ground, the cable can enter the cable trough body, so as to facilitate the passage of pedestrians and vehicles.

[0004] The above patent realizes the technical effect of facilitating the passage of pedestrians or vehicles by storing the cables exposed on the ground under the ground. However, the closed cable trough in this patent is not suitable for the technical characteristics of the moving cable accompanying the movement of the port crane equipment during operation. Moreover, the following technical problems exist when the conventional cable trough is applied to the port crane power supply system: (1) The moving cable in the conventional cable trough will have a large area of contact with the inner wall and bottom of the cable trough, and it is prone to generate moving friction during the operation of the port crane equipment, damaging the cable protective layer. At the same time, when the moving distance is too long, the cable may deviate; (2) Although the open cable trough adapts to the operating characteristics of the port crane equipment power supply system, due to its open design, it is easy for personnel to accidentally step on it during operation, posing a certain safety hazard. Secondly, the open cable trough is easily affected by external environmental factors, such as the intrusion of sundries and sewage. Especially during the rainy season, the cable trough is prone to water accumulation, resulting in the cable being soaked in water for a long time. At the same time, a large amount of flushing sewage generated during the production process is also easy to enter the cable trough, resulting in the cable trough accumulating water, further reducing its service life and safety. Summary of the Invention

[0005] In view of the above defects or improvement requirements of the prior art, the present invention provides a cable trough for power supply to port cranes at a wharf. By placing the cable inside the anti-damage component and using a plurality of rubber idlers inside the anti-damage component to assist the cable reel in winding and unwinding the cable, it is possible to avoid friction between the cable and the inner wall and bottom of the cable trough body, thereby protecting the cable. Secondly, by making the cable trough body have a certain slope and cooperating with the anti-pollution component provided at the end of the cable trough body, moisture can be discharged in a timely manner to avoid the cable being soaked in water for a long time. In addition, through the cooperation of the anti-pollution component and the anti-damage component provided at the upper end of the cable trough body, this part of the anti-pollution component has an automatic return function, so as not to hinder the cable reel from recycling the cable. At the same time, after the cable reel drops the cable, the anti-pollution component can automatically return to the state of closing the cable trough body, preventing water flow and sundries from entering, reducing the cleaning workload, and increasing the service life of the cable.

[0006] To achieve the above object, the present invention provides a cable trough for power supply to port cranes at a wharf, including: a cable trough body, an anti-damage component, and an anti-pollution component, wherein:

[0007] The cable trough body is arranged on the working ground below the cable reel and is parallel to the rails for the operation of port crane equipment. A plurality of pairs of first grooves are provided on the inner walls on both sides thereof;

[0008] The anti-loss components include: a first idler, a second idler and an adjusting bolt; fixed shafts are provided at the centers of the first idler and the second idler, and a cylinder body that rotates around the fixed shaft is sleeved at the fixed position in the middle of the fixed shaft; the first idlers are arranged in pairs near the inner walls on both sides of the cable trough body; the second idler is horizontally arranged above the bottom of the cable trough body, and both ends of its fixed shaft are arranged in two corresponding first grooves; the adjusting bolt passes through an ear plate provided at one end of the fixed shaft of the first idler and is rotatably connected to the inner wall of the cable trough body;

[0009] The anti-pollution components include: a cover plate, a hinge, a return spring and a drain pipe; the cover plate is arranged at the upper end of the cable trough body through the hinge; both ends of the return spring are respectively connected to the bottom end of the cover plate and one end of the fixed shaft of the second idler; the drain pipe is arranged at the bottom end of the end of the cable trough body.

[0010] Further, both the first idler and the second idler are rubber idlers;

[0011] The first idler and the second idler are arranged in a staggered manner.

[0012] Further, an adjusting nut for fixing the ear plate is provided on the adjusting bolt, and the fixed shaft of the first idler is extruded so that the other end thereof is in close contact with the bottom of the cable trough body without loosening;

[0013] By rotating the adjusting bolt, the distance between two corresponding first idlers can be adjusted.

[0014] Further, the included angle between the first idler and the bottom of the cable trough body ranges from 70° to 90°.

[0015] Further, through holes are provided at both ends of the fixed shaft of the second idler, and the second idler is arranged in the first groove through a lug; and

[0016] The lug is arranged vertically.

[0017] Further, the cover plate is mainly made of a lightweight composite material;

[0018] A flexible pad is provided in the middle of the bottom end of the cover plate;

[0019] The upper surface of the cover plate is at the same height as the working ground.

[0020] Further, a strip-shaped convex block is provided on the front side of the bottom end of the cover plate, and a second groove adapted to the strip-shaped convex block is provided at the corresponding position on the upper end of the cable trough body.

[0021] Further, a plurality of return springs with different lengths are uniformly connected to the bottom end of the same cover plate and are simultaneously connected to one end of the fixed shaft of the second idler.

[0022] Furthermore, a floor drain with a water stop valve is provided at the connection between the drain pipe and the cable trough body; and

[0023] The other end of the drain pipe is connected to the dock rainwater collection system.

[0024] Furthermore, the cable trough body is single-sloped, with a slope of 4.5‰ to 5.5‰, and the starting depth ranges from 120 mm to 130 mm.

[0025] Generally speaking, compared with the prior art, the above technical solutions conceived by the present utility model can achieve the following beneficial effects:

[0026] (1) For the power supply cable trough of the present utility model, by placing the cable inside the anti-damage component and using multiple rubber idlers inside the anti-damage component to assist the cable reel in winding and unwinding the cable, it is possible to avoid friction between the cable and the inner wall and bottom of the cable trough body, thereby protecting the cable. Secondly, through the cooperation of the anti-pollution component and the anti-damage component provided at the upper end of the cable trough body, the anti-pollution component in this part has an automatic return function, thus not hindering the cable reel from recovering the cable. At the same time, after the cable reel has laid down the cable, the anti-pollution component can automatically return to the state of closing the cable trough body, avoiding the entry of water flow and sundries, reducing the cleaning workload, and increasing the service life of the cable.

[0027] (2) For the power supply cable trough of the present utility model, by setting both the first idler and the second idler as rubber idlers and having a rotating shaft at the center, and placing the cable 2 between the first idler 6 and the second idler 7, it is ensured that when the port machinery equipment moves horizontally, the cable moves smoothly and without damage inside the anti-damage component under the action of the cable reel, avoiding deviation, and thus extending the service life of the cable, reducing costs and increasing efficiency.

[0028] (3) For the power supply cable trough of the present utility model, by arranging the drain pipe at the bottom end of the cable trough body with a certain slope at the end, the water existing inside the cable trough body can be drained in time, avoiding the cable being soaked in water for a long time.

[0029] (4) For the power supply cable trough of the present utility model, by setting a floor drain with a water stop valve at the connection between the drain pipe and the cable trough body, it is possible to prevent the backflow of high water levels. At the same time, by connecting the other end of the drain pipe to the dock rainwater collection system, it is ensured that the sewage is collected in a suitable position, avoiding environmental pollution.

[0030] (5) For the power supply cable trough of the present utility model, by providing a strip-shaped convex block on the front side of the bottom end of the cover plate and providing a second groove adapted to the strip-shaped convex block at the corresponding position on the upper end of the cable trough body, it is used to further enhance the sealing performance and avoid sundries and water flow from entering the inside of the cable trough body 5. Brief Description of the Drawings

[0031] Figure 1 is a top view of the dock in the embodiment of the present utility model;

[0032] Figure 2 is a cross-sectional view taken along line A-A in the embodiment of the present utility model;

[0033] Figure 3 is a schematic structural view when a cable is placed at A-A in the embodiment of the present utility model;

[0034] Figure 4 is a schematic structural view when no cable is placed at A-A in the embodiment of the present utility model;

[0035] Figure 5 is a schematic structural view of the strip-shaped convex block and the second groove at A-A in the embodiment of the present utility model.

[0036] In all the drawings, the same reference numerals denote the same technical features, specifically: 1 - steel rail, 2 - cable, 3 - port machinery equipment, 4 - cable reel, 5 - cable trough body, 51 - first groove, 52 - second groove, 6 - first idler, 7 - second idler, 71 - lug, 8 - adjusting bolt, 81 - adjusting nut, 9 - cover plate, 91 - strip-shaped convex block, 10 - hinge, 11 - return spring, 12 - drain pipe. Detailed Embodiment

[0037] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0038] As Figures 1 to 5As shown in the figure, an embodiment of the present utility model provides a power supply cable trough for a dock harbor crane. The power supply cable trough includes: a cable trough body 5, a damage prevention component, and a pollution prevention component; the cable trough body 5 is arranged on the working ground below the cable reel 4; the damage prevention component is arranged inside the cable trough body 5; the pollution prevention components are respectively arranged at the upper end and the bottom end of the cable trough body 5; during the operation of the harbor crane equipment 3, by placing the cable 2 inside the damage prevention component and using a plurality of rubber idler rollers inside the damage prevention component to assist the cable reel 4 in taking in and paying out the cable 2, the cable 2 is prevented from rubbing against the inner wall and the bottom of the cable trough body 5, thereby protecting the cable 2; secondly, by making the cable trough body 5 have a certain slope and cooperating with the pollution prevention component arranged at the end of the cable trough body 5, moisture is discharged in time to prevent the cable 2 from being soaked in water for a long time; in addition, through the cooperation of the pollution prevention component arranged at the upper end of the cable trough body 5 and the damage prevention component, the pollution prevention component in this part has an automatic return function, so as not to hinder the cable reel 4 from recovering the cable 2. At the same time, after the cable reel 4 pays out the cable 2, the pollution prevention component can automatically return to the state of closing the cable trough body 5, preventing water flow and sundries from entering, reducing the cleaning workload, and improving the service life of the cable 2.

[0039] Specifically, as Figures 1 to 5 shown, the cable trough body 5 is arranged on the working ground below the cable reel 4 and is parallel to the rail 1 for the operation of the harbor crane equipment 3, for supporting other components and accommodating the cable 2 to prevent it from being damaged.

[0040] Preferably, the cable trough body 5 is single-sloped, and the slope is 4.5‰ to 5.5‰, for ensuring quick drainage under the condition of convenient installation of other components.

[0041] Preferably, the starting depth of the cable trough body 5 is designed according to the maximum size of the cable 2 to be accommodated, and the range is 120 mm to 130 mm.

[0042] Preferably, a plurality of pairs of first grooves 51 are provided on the inner walls on both sides of the cable trough body 5 for installing the damage prevention component.

[0043] Specifically, as Figures 3 to 5As shown, the anti-damage component is disposed inside the cable trough body 5 to prevent the cable 2 from being damaged by friction with the inner wall and bottom of the cable trough body 5; the anti-damage component includes: a first idler 6, a second idler 7, and an adjusting bolt 8. Among them, fixed shafts are provided at the centers of the first idler 6 and the second idler 7, and cylinders that rotate around the fixed shafts are sleeved at the fixed positions in the middle of the fixed shafts; the first idler 6 is disposed near the inner walls on both sides of the cable trough body 5 and is arranged in pairs; the second idler 7 is horizontally disposed above the bottom of the cable trough body 5, and both ends of its fixed shaft are respectively disposed in two corresponding first grooves 51; the adjusting bolt 8 passes through an ear plate provided at one end of the fixed shaft of the first idler 6 and is rotatably connected to the inner wall of the cable trough body 5. During the actual use of the anti-damage component, by disposing the cable 2 between the first idler 6 and the second idler 7, it is ensured that when the port machine equipment 3 moves horizontally, the cable 2 moves smoothly and without damage inside the anti-damage component under the action of the cable reel 4, avoiding deviation, and prolonging the service life of the cable 2, reducing costs and increasing efficiency.

[0044] Preferably, both the first idler 6 and the second idler 7 are rubber idlers.

[0045] Preferably, the first idler 6 and the second idler 7 are arranged in a staggered manner to reduce the number of the first idler 6 and the second idler 7 under the condition of stably supporting the cable 2, thereby reducing costs.

[0046] Preferably, an adjusting nut 81 for fixing the ear plate is provided on the adjusting bolt 8, and the fixed shaft of the first idler 6 is squeezed so that the other end thereof is in close contact with the bottom of the cable trough body 5 without loosening, which is used to reduce the installation difficulty of the first idler 6 and improve the construction efficiency.

[0047] Preferably, by rotating the adjusting bolt 8, the distance between two corresponding first idlers 6 can be adjusted to adapt to cables 2 of different sizes, thereby improving the practicability of the power supply cable trough.

[0048] Preferably, the included angle between the first idler 6 and the bottom of the cable trough body 5 ranges from 70° to 90°.

[0049] Preferably, through holes are provided at both ends of the fixed shaft of the second idler 7, and the second idler 7 is disposed in the first groove 51 through a lug 71, and the lug 71 is vertically arranged, which is used to facilitate the quick disassembly and assembly of the second idler 7 and move up and down along the lug 71 with the anti-pollution component, reducing the risk of the second idler 7 falling out of the first groove 51.

[0050] Specifically, as Figures 2 to 5As shown in the figure, the anti-fouling components are respectively arranged at the bottom ends of the upper and the end of the cable trough body 5, which are used to prevent water flow and sundries from entering the cable trough body 5 and timely drain the possible moisture in the cable trough body 5. The anti-fouling components include: a cover plate 9, a hinge 10, a return spring 11 and a drain pipe 12. Among them, the cover plate 9 is arranged at the upper end of the cable trough body 5 through the hinge 10; both ends of the return spring 11 are respectively connected to the bottom end of the cover plate 9 and one end of the fixed shaft of the second idler 7; the drain pipe 12 is arranged at the bottom end of the end of the cable trough body 5. During the use of the anti-fouling components, by arranging the drain pipe 12 at the bottom end of the end of the cable trough body 5 with a certain slope, the moisture existing in the cable trough body 5 can be timely drained, avoiding the cable 2 being soaked in water for a long time. Secondly, through the cover plate 9 and the hinge 10, the cable reel 4 can conveniently recover the cable 2 from the cable trough body 5. At the same time, after the cable reel 4 puts down the cable 2, under the self-weight of the cable 2, through the second idler 7, the hinge 10 and the return spring 11, the cover plate 9 can automatically return to the state of closing the cable trough body 5, preventing water flow and sundries from entering, and improving the service life of the cable 2.

[0051] Preferably, the cover plate 9 is mainly made of a lightweight composite material, which is used to facilitate the cable reel 4 to recover the cable 2.

[0052] Preferably, a flexible pad is arranged in the middle of the bottom end of the cover plate 9, which is used to reduce the friction between the cover plate 9 and the cable 2.

[0053] Preferably, the upper surface of the cover plate 9 is at the same height as the working ground, which is used to reduce the wear of the cover plate 9. At the same time, it ensures the convenience and safety of the dock operation personnel to cross the cable trough.

[0054] In an alternative embodiment, a strip-shaped convex block 91 is arranged on the front side of the bottom end of the cover plate 9, and a second groove 52 adapted to the strip-shaped convex block is arranged at the corresponding position of the upper end of the cable trough body 5, which is used to further enhance the sealing performance and prevent sundries and water flow from entering the inside of the cable trough body 5.

[0055] Preferably, a plurality of return springs 11 with different lengths are uniformly connected to the bottom end of the same cover plate 9 and are simultaneously connected to one end of the fixed shaft of the second idler 7, which is used to enhance the reset ability of the cover plate 9, reduce the number of the second idlers 7 and reduce the cost.

[0056] Preferably, the connection area between the return spring 11 and the cover plate 9 includes the connection area between the cover plate 9 and the hinge 10, or directly connects to a partial structure of the hinge 10 connected to the cover plate 9.

[0057] Preferably, a floor drain with a water stop valve is provided at the connection between the drain pipe 12 and the cable trough body 5 to prevent backflow of high water levels.

[0058] Preferably, the other end of the drain pipe 12 is connected to the dock rainwater collection system to ensure that sewage is collected in a suitable position and environmental pollution is avoided.

[0059] The working principle of the present utility model is as follows: After measuring and setting out the position of the drain pipe 12 and installing the drain pipe 12, on the working ground below the cable reel 4, a cable trough body 5 parallel to the rail 1 on which the port machine equipment 3 operates is provided, and the slope, the inner wall is leveled and subsequent other components are installed as required, including the first groove 51 and the second groove 52; After the structure of the cable trough body 5 is formed, the second idler 7 is installed in the two first grooves 51 on both sides through the lug 71, and at the same time, the first idler 6 is installed out of position through the adjusting bolt 8; The cover plate 9 is installed at the upper end of the cable trough body 5 through the hinge 10, and the cover plate 9 is connected to the second idler 7 through the return spring 11, that is, the installation of the power supply cable trough is completed; And in the subsequent use process, the cable 2 is placed between the first idler 6 and the second idler 7 to avoid deviation and damage of the cable 2; At the same time, when the cable 2 is recovered with the cable reel 4, the cover plate 9 is turned over one by one and the second idler 7 is driven to rise by the return spring 11, and then, when the cable reel 4 puts back the cable 2, under the self-weight of the cable 2, the second idler 7 descends, and the cover plate 9 is driven by the return spring 11 to re-close the cable trough body 5, thereby avoiding the intrusion of external rainwater and sundries, reducing the workload of cleaning the cable trough, and increasing the service life of the cable 2.

[0060] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0061] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0062] In this patent, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or apparatus. Without further limitation, the elements defined by the statement "comprising..." do not exclude the presence of additional identical elements in the process, method, article or apparatus comprising the said elements.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit it; it is easy for those skilled in the art to understand that the above description is only the preferred embodiments of the present utility model and is not used to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power supply cable trough for a dock port machine, characterized in that, Including: A cable trough body (5), a damage prevention component and a pollution prevention component, where: The cable trough body (5) is arranged on the working ground below the cable reel (4) and is parallel to the rail (1) for the operation of the port machinery equipment (3). A plurality of pairs of first grooves (51) are provided on the inner walls of both sides thereof; The damage prevention component includes: a first idler (6), a second idler (7) and an adjusting bolt (8); fixed shafts are provided at the centers of the first idler (6) and the second idler (7), and a cylinder body that rotates around the fixed shaft is sleeved at the fixed position in the middle of the fixed shaft; the first idler (6) is arranged near the inner walls of both sides of the cable trough body (5) and is arranged in pairs; the second idler (7) is horizontally arranged above the bottom of the cable trough body (5), and both ends of its fixed shaft are arranged in two corresponding first grooves (51); the adjusting bolt (8) passes through an ear plate provided at one end of the fixed shaft of the first idler (6) and is rotatably connected to the inner wall of the cable trough body (5); The pollution prevention component includes: a cover plate (9), a hinge (10), a return spring (11) and a drain pipe (12); the cover plate (9) is arranged at the upper end of the cable trough body (5) through the hinge (10); both ends of the return spring (11) are respectively connected to the bottom end of the cover plate (9) and one end of the fixed shaft of the second idler (7); the drain pipe (12) is arranged at the bottom end of the end of the cable trough body (5).

2. The power supply cable trough according to claim 1, characterized in that, Both the first idler (6) and the second idler (7) are rubber idlers; The first idler (6) and the second idler (7) are arranged in a staggered manner.

3. The power supply cable trough according to claim 1, wherein An adjusting nut (81) for fixing the ear plate is provided on the adjusting bolt (8), and the fixed shaft of the first idler (6) is squeezed so that the other end thereof is in close contact with the bottom of the cable trough body (5) without loosening; By rotating the adjusting bolt (8), the distance between two corresponding first idlers (6) can be adjusted.

4. The power supply cable trough according to claim 1, characterized in that, The included angle between the first idler (6) and the bottom of the cable trough body (5) ranges from 70° to 90°.

5. The power supply cable duct according to any one of claims 1 to 4, characterized in that Through holes are provided at both ends of the fixed shaft of the second idler (7), and the second idler (7) is arranged in the first groove (51) through a lug (71); and The lug (71) is arranged vertically.

6. The power supply cable trough according to any one of claims 1 to 4, characterized in that The cover plate (9) is mainly made of a lightweight composite material; A flexible pad is provided in the middle of the bottom end of the cover plate (9); The upper surface of the cover plate (9) is at the same height as the working ground.

7. The power supply cable trough according to any one of claims 1 to 4, characterized in that A strip-shaped convex block (91) is provided on the front side of the bottom end of the cover plate (9), and a second groove (52) adapted to the strip-shaped convex block is provided at the corresponding position at the upper end of the cable trough body (5).

8. The power supply cable trough according to any one of claims 1 to 4, characterized in that A plurality of return springs (11) with different lengths are uniformly connected to the bottom end of the same cover plate (9) and are simultaneously connected to one end of the fixed shaft of the second idler (7).

9. The power supply cable duct according to any one of claims 1 to 4, characterized in that A floor drain with a water stop valve is provided at the connection between the drain pipe (12) and the cable trough body (5); and The other end of the drain pipe (12) is connected to the dock rainwater collection system.

10. The power supply cable trough according to any one of claims 1 to 4, characterized in that The cable trough body (5) is single-slope, and the slope is 4.5‰ to 5.5‰, and the starting depth range is 120 mm to 130 mm.

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