Long-distance high-voltage cable laying device for pumped storage power station

Abstract

The utility model discloses a pumped storage power station long-distance high-voltage cable laying device which comprises a cable laying machine (1) and a cable arranging machine (2) which are connected with each other, and further comprises a cable pressing mechanism and a cable holder which are arranged at the rear end of the cable laying machine (1), the cable pressing mechanism comprises a first stand column (3), one side of the first stand column (3) is rotatably connected with a swing frame (4), and the other side of the first stand column (3) is rotatably connected with the cable arranging machine (2). The end part of the swing frame (4) is fixedly connected with a main shaft (5), the middle part of the main shaft (5) is rotatably connected with a wire pressing roller (6), the end part of the main shaft (5) is detachably connected with a limiting rod (7), the end part of the limiting rod (7) extends to the radial outer side of the wire pressing roller (6) and is rotatably connected with a roller (8), and a wiring groove for a cable to pass through is formed between the roller (8) and the wire pressing roller (6). According to the utility model, the laying stability of the cable can be improved.

Description

Technical Field

[0001] The utility model relates to a cable laying device, in particular to a long-distance high-voltage cable laying device for a pumped storage power station. Background Art

[0002] Pumped-storage power stations typically use three 500kV cables, running from the underground GIS along long-distance outgoing tunnels to the cable mezzanine of the surface GIS switch building, where they are then connected to the surface GIS. This requires the manufacturer to lay the cables during installation. Current long-distance cable laying equipment typically consists of a cable unwinder, a cable spooler, and rollers. The cable unwinder is installed at the end and is used to roll the cable from the cable rack. The cable spooler is used in conjunction with a cable hoist, traction machine, and cable unwinding pulley to pull and position the cable, achieving a cable unwinding effect. Multiple rollers are spaced on either side of the cable unwinder and move with it, supporting the cable and reducing friction during transportation.

[0003] However, this cable laying method has the drawback that the speeds of the cable unwinder and the cable reel are not completely consistent. This speed difference often causes the cable to become loose or over-tightened during the laying process, thus affecting the cable laying effect. Furthermore, when the cable is too loose, it can easily drag on the ground or detach from the roller, affecting the stability and quality of the cable laying.

[0004] In addition, due to factors such as the external environment and unexpected interference, the cable-laying machine will not maintain a uniform speed during the cable-laying process and will often need to stop. Once there is a deviation in the stopping time of the cable-laying machine and the cable-laying machine, it will easily cause excessive cable laying, which further increases the possibility of the cable loosening and falling, affecting the stability of cable laying.

[0005] Therefore, the existing cable laying method has the problem of poor laying stability. Utility Model Content

[0006] The purpose of the utility model is to provide a long-distance high-voltage cable laying device for a pumped storage power station, which can improve the laying stability of the cable.

[0007] The technical solution of the present utility model is as follows: a long-distance high-voltage cable laying device for a pumped-storage power station, comprising a cable unwinding machine and a cable arranging machine connected to each other, and also comprising a wire pressing mechanism and a wire rack arranged at the rear end of the cable unwinding machine, the wire pressing mechanism comprising a first column, one side of the first column is rotatably connected to a swing frame, the end of the swing frame is fixedly connected to a main shaft, the middle part of the main shaft is rotatably connected to a wire pressing roller, the end of the main shaft is detachably connected to a limiting rod, the end of the limiting rod extends to the radially outer side of the wire pressing roller and is rotatably connected to a roller, and a wiring groove for the cable to pass through is formed between the roller and the wire pressing roller.

[0008] In the aforementioned long-distance high-voltage cable laying device for a pumped-storage power station, counterweights are detachably connected to the swing frames on both sides of the first column.

[0009] In the aforementioned long-distance high-voltage cable laying device for a pumped-storage power station, the limit rod has an L-shaped shape, the end of the main shaft is slidably connected to the limit rod through a slide groove, and a locking screw threadedly connected to the main shaft is provided on one side of the slide groove. The locking screw is used to axially limit the limit rod after being screwed in.

[0010] In the aforementioned long-distance high-voltage cable laying device for a pumped-storage power station, the end of the locking screw is in contact with the side wall of the limiting rod.

[0011] In the aforementioned long-distance high-voltage cable laying device for a pumped-storage power station, a tooth groove is provided on the side wall of the limit rod, the outside of the tooth groove is engaged with a tooth plate located in the slide groove, and the end of the locking screw extends into the slide groove and engages with the tooth plate.

[0012] In the aforementioned long-distance high-voltage cable laying device for a pumped-storage power station, a first baffle is fixedly connected to one side of the limit rod, and a limit nut is threadedly connected to the other side of the limit rod. The inner side of the limit nut is provided with a second baffle which is sleeved on the limit rod. The first baffle and the second baffle are respectively located on the left and right sides of the roller and are used to limit the roller axially.

[0013] In the aforementioned long-distance high-voltage cable laying device for a pumped-storage power station, the wire rack includes a second column, a telescopic rod is slidably connected to the second column, and the upper end of the telescopic rod is rotatably connected to a conductor roller.

[0014] In the aforementioned long-distance high-voltage cable laying device for a pumped-storage power station, sensors located on the upper and lower sides of the swing frame are detachably connected to the first column, and the sensors are used to control the cable unwinding machine to change speed after the swing frame rotates to a high or low position.

[0015] Compared with the prior art, the present invention has the following features:

[0016] (1) The utility model cooperates with the structure of the swing frame and the wire pressing roller to press and tension the cable after it is extended, and floats up and down with the extension of the cable, thereby alleviating the looseness of the cable caused by excessive extension or the over-tensioning problem caused by insufficient excessive release, and effectively improving the laying stability of the cable; on this basis, through the coordinated setting of the limit rod and the roller, an annular wiring groove can be formed on the outside of the cable, thereby preventing the cable from detaching from the wire pressing roller after excessive extension, thereby facilitating the subsequent re-tightening of the cable, and further improving the laying stability of the cable of the utility model;

[0017] (2) By limiting the connection structure of the limit rod and the roller, the extended position of the limit rod on the main shaft and the lateral position of the roller on the limit rod can be adjusted as needed, thereby ensuring that the roller can press the cable stably after adjustment to prevent the cable from being detached after being loosened. On the other hand, it can also be applied to cables of different outer diameters, thereby improving the applicability of the utility model.

[0018] (3) By coordinating the structure of the swing frame and the counterweight, the manufacturer can control the tension of the cable on the wire roller by adjusting the weight of the counterweight, thereby ensuring that the cable is fully tensioned under the pressure while avoiding excessive pressure on the wire roller;

[0019] Therefore, the utility model can improve the laying stability of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 This is a schematic diagram of the installation of the pressure roller and the limit rod in Example 1;

[0022] Figure 3 This is a schematic diagram of the installation of the line pressure roller and the limit rod in Example 2.

[0023] The marks in the accompanying drawings are: 1-cable unwinding machine, 2-cable arranging machine, 3-first column, 4-swing frame, 5-main shaft, 6-wire pressing roller, 7-limiting rod, 8-roller, 9-counterweight, 10-slide, 11-locking screw, 12-tooth plate, 13-first baffle, 14-limiting nut, 15-second baffle, 16-second column, 17-telescopic rod, 18-conductor roller, 19-sensor, 701-tooth groove. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0025] Example 1. A long-distance high-voltage cable laying device for a pumped storage power station, comprising: Figure 1 and 2 As shown, it includes a cable unwinding machine 1 and a cable arranging machine 2 that are connected to each other. Multiple supporting wheels can be set on both sides of the cable arranging machine 2 as needed. It also includes a wire pressing mechanism and a wire rack arranged at the rear end of the cable unwinding machine 1. The wire pressing mechanism includes a first column 3, one side of the first column 3 is rotatably connected to a swing frame 4, the end of the swing frame 4 is fixedly connected to a main shaft 5, the middle part of the main shaft 5 is rotatably connected to a wire pressing roller 6, and a V-shaped groove is formed on the outside of the wire pressing roller 6 for fastening the cable. The end of the main shaft 5 is detachably connected to a limiting rod 7, and the end of the limiting rod 7 extends to the radial outside of the wire pressing roller 6 and is rotatably connected to a roller 8. A wiring groove for the cable to pass through is formed between the roller 8 and the wire pressing roller 6.

[0026] Counterweights 9 are detachably connected to the swing frames 4 on both sides of the first column 3 .

[0027] The shape of the limiting rod 7 is L-shaped, and the end of the main shaft 5 is slidably connected to the limiting rod 7 through a sliding groove 10. A locking screw 11 threadedly connected to the main shaft 5 is provided on one side of the sliding groove 10. The locking screw 11 is used to axially limit the limiting rod 7 after being screwed in.

[0028] The end of the locking screw 11 is in contact with the side wall of the limiting rod 7 .

[0029] A first baffle 13 is fixedly connected to one side of the limit rod 7, and a limit nut 14 is threadedly connected to the other side of the limit rod 7. A second baffle 15 is provided on the inner side of the limit nut 14 and is sleeved on the limit rod 7. The first baffle 13 and the second baffle 15 are respectively located on the left and right sides of the roller 8 and are used to limit the roller 8 axially.

[0030] The wire rack includes a second column 16 , on which a telescopic rod 17 is slidably connected. After being extended to any height, the telescopic rod 17 can be height-limited by a conventional fixing mechanism. The upper end of the telescopic rod 17 is rotatably connected to a wire roller 18 .

[0031] The first column 3 is detachably connected to sensors 19 located on the upper and lower sides of the swing frame 4. The sensor 19 can be a proximity switch or a photoelectric switch. The sensor 19 is used to control the cable unwinding machine 1 to change speed after the swing frame 4 rotates to a high position or a low position, so that the swing frame 4 always remains in a suspended state.

[0032] Working principle of the present utility model: When installing the present utility model, the cable drum wrapped with the cable is first installed on the cable unwinding machine 1, and then the cable is pulled out and passed through the pressure roller 6, the conductor roller 18 and the cable arrangement machine 2 in sequence, so that the cable is respectively unwound and arranged by the cable unwinding machine 1 and the cable arrangement machine 2 to realize the laying function. When the cable passes through the pressure roller 6, the operator first fits the cable to the surface of the pressure roller 6, and then adjusts the lateral position of the roller 8 by rotating the limit nut 14 according to the outer diameter of the cable, so that the two rollers 8 press the surface of the cable from both sides after they are in place. After the roller 8 is positioned, the operator tightens the locking screw 11 to limit the height of the roller 8, so that the roller 8 cooperates with the pressure roller 6 to press the side walls of the cable after installation, preventing the cable from detaching from the pressure roller 6 in a loose state.

[0033] When the cable is being arranged, it extends from the cable unwinder 1 along a V-shaped routing path, passing through the pressure roller 6 and the conductor roller 18. The pressure roller 6 applies a downward pressure to the cable. Simultaneously, if the payout and take-up speeds of the cable unwinder 1 and cable unwinder 2 deviate, the swing frame 4 swings up and down according to the extension of the cable, thus ensuring that the cable remains taut. When the swing frame 4 swings to the trigger sensor 19, it indicates that the cable's excess capacity is too large or too small, and the cable unwinder 1 changes speed according to the set value, keeping the swing frame 4 suspended between the two thresholds.

[0034] Example 2. A long-distance high-voltage cable laying device for a pumped storage power station, comprising: Figure 1 and 3 As shown, it includes a cable unwinding machine 1 and a cable arranging machine 2 that are connected to each other, and also includes a wire pressing mechanism and a wire rack arranged at the rear end of the cable unwinding machine 1, the wire pressing mechanism includes a first column 3, one side of the first column 3 is rotatably connected to a swing frame 4, the end of the swing frame 4 is fixedly connected to a main shaft 5, the middle part of the main shaft 5 is rotatably connected to a wire pressing roller 6, the outside of the wire pressing roller 6 is formed with a V-shaped groove for fastening the cable, the end of the main shaft 5 is detachably connected to a limiting rod 7, the end of the limiting rod 7 extends to the radial outside of the wire pressing roller 6 and is rotatably connected to a roller 8, and a wiring groove for the cable to pass through is formed between the roller 8 and the wire pressing roller 6.

[0035] Counterweights 9 are detachably connected to the swing frames 4 on both sides of the first column 3 .

[0036] The shape of the limiting rod 7 is L-shaped, and the end of the main shaft 5 is slidably connected to the limiting rod 7 through a sliding groove 10. A locking screw 11 threadedly connected to the main shaft 5 is provided on one side of the sliding groove 10. The locking screw 11 is used to axially limit the limiting rod 7 after being screwed in.

[0037] A tooth groove 701 is provided on the side wall of the limiting rod 7 , and the outside of the tooth groove 701 is buckled and connected to a tooth plate 12 located in the slide groove 10 . The end of the locking screw 11 extends into the slide groove 10 and buckles with the tooth plate 12 .

[0038] A first baffle 13 is fixedly connected to one side of the limit rod 7, and a limit nut 14 is threadedly connected to the other side of the limit rod 7. A second baffle 15 is provided on the inner side of the limit nut 14 and is sleeved on the limit rod 7. The first baffle 13 and the second baffle 15 are respectively located on the left and right sides of the roller 8 and are used to limit the roller 8 axially.

[0039] The wire rack includes a second column 16 , on which a telescopic rod 17 is slidably connected. After being extended to any height, the telescopic rod 17 can be height-limited by a conventional fixing mechanism. The upper end of the telescopic rod 17 is rotatably connected to a wire roller 18 .

[0040] The first column 3 is detachably connected to sensors 19 located on the upper and lower sides of the swing frame 4. The sensor 19 can be a proximity switch or a photoelectric switch. The sensor 19 is used to control the cable unwinding machine 1 to change speed after the swing frame 4 rotates to a high position or a low position, so that the swing frame 4 always remains in a suspended state.

[0041] Compared with Example 1, this embodiment improves the connection structure between the main shaft 5 and the limit rod 7 by interlocking the limit rod 7 with the tooth plate 12 through the tooth groove 701 and using the locking screw 11 to squeeze and limit the tooth plate 12, so as to improve the axial limiting effect of the limit rod 7 and prevent the possibility of axial movement of the limit rod 7.

Claims

1. A long-distance high-voltage cable laying device for a pumped storage power station, comprising a cable unwinding machine (1) and a cable unwinding machine (2) connected to each other, characterized in that: The invention also includes a wire pressing mechanism and a wire rack arranged at the rear end of the cable unfolding machine (1), wherein the wire pressing mechanism includes a first column (3), one side of the first column (3) is rotatably connected to a swing frame (4), the end of the swing frame (4) is fixedly connected to a main shaft (5), the middle of the main shaft (5) is rotatably connected to a wire pressing roller (6), the end of the main shaft (5) is detachably connected to a limiting rod (7), the end of the limiting rod (7) extends to the radial outer side of the wire pressing roller (6) and is rotatably connected to a roller (8), and a wiring groove for the cable to pass through is formed between the roller (8) and the wire pressing roller (6).

2. The long-distance high-voltage cable laying device for a pumped storage power station according to claim 1, characterized in that: Counterweights (9) are detachably connected to the swing frames (4) on both sides of the first column (3).

3. The long-distance high-voltage cable laying device for a pumped storage power station according to claim 1, characterized in that: The limiting rod (7) has an L-shaped outer shape. The end of the main shaft (5) is slidably connected to the limiting rod (7) via a sliding groove (10). A locking screw (11) threadedly connected to the main shaft (5) is provided on one side of the sliding groove (10). The locking screw (11) is used to axially limit the limiting rod (7) after being screwed in.

4. The long-distance high-voltage cable laying device for a pumped storage power station according to claim 3, characterized in that: The end of the locking screw (11) is in contact with the side wall of the limiting rod (7).

5. The long-distance high-voltage cable laying device for a pumped storage power station according to claim 3, characterized in that: A tooth groove (701) is provided on the side wall of the limiting rod (7), and the outside of the tooth groove (701) is buckled and connected to a tooth plate (12) located in the sliding groove (10), and the end of the locking screw (11) extends into the sliding groove (10) and is buckled with the tooth plate (12).

6. The long-distance high-voltage cable laying device for a pumped storage power station according to claim 3, characterized in that: One side of the limiting rod (7) is fixedly connected to a first blocking piece (13), and the other side of the limiting rod (7) is threadedly connected to a limiting nut (14). The inner side of the limiting nut (14) is provided with a second blocking piece (15) sleeved on the limiting rod (7). The first blocking piece (13) and the second blocking piece (15) are respectively located on the left and right sides of the roller (8) and are used to axially limit the roller (8).

7. The long-distance high-voltage cable laying device for a pumped storage power station according to claim 1, characterized in that: The wire rack comprises a second column (16), a telescopic rod (17) is slidably connected to the second column (16), and the upper end of the telescopic rod (17) is rotatably connected to a wire roller (18).

8. The long-distance high-voltage cable laying device for a pumped storage power station according to claim 1, characterized in that: The first column (3) is detachably connected to sensors (19) located on the upper and lower sides of the swing frame (4). The sensors (19) are used to control the cable unwinding machine (1) to change speed after the swing frame (4) rotates to a high position or a low position.

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