Pumped storage power station pipeline dredging device and dredging method

Abstract

The present invention discloses a pipeline dredging device and a dredging method for a pumped storage power station, comprising a crawler vehicle (1) with a remote control function, a container (2) with a top opening provided on the top of the crawler vehicle (1), a collecting mechanism provided on the front side of the crawler vehicle (1), a conveying mechanism provided between the collecting mechanism and the crawler vehicle (1), a light source (3) and a video device (4) with a wireless transmission function provided on the crawler vehicle (1), and a control mechanism connected to the conveying mechanism; the collecting mechanism comprises two side beams (5) located on both sides of the width of the crawler vehicle (1), the side beams (5) are inclined and the front ends are in contact with the ground, an arc-shaped shovel plate (6) is provided between the two side beams (5), and the shovel plate (6) is located at the front ends of the side beams (5). The present invention has the advantages of high efficiency, low labor intensity for workers, no danger, low failure rate and low cost.

Description

Technical Field

[0001] The present invention belongs to the field of pipeline dredging in pumped storage power stations, and in particular relates to a pipeline dredging device and a dredging method for pumped storage power stations. Background Art

[0002] The structure of a pumped-storage power station consists of an upper reservoir connected to a steeply inclined downward pressure pipe via a slightly downward-sloping diversion pipe. The pressure pipe is then connected to a slightly upward-sloping tailrace pipe via a reversible turbine. The tailrace pipe then connects to the lower reservoir, where the turbine is connected to the generator. Both the diversion pipe and the tailrace pipe are equipped with surge tanks (also known as surge tanks). During peak daytime electricity demand, the upper reservoir's sluice gates are opened to release water, allowing water to flow through the diversion pipe into the pressure pipe, driving the turbine. The turbine then generates current for the generator, and the water discharged from the turbine enters the lower reservoir through the tailrace pipe. During nighttime low electricity demand, the turbine acts as a pump, pumping water from the lower reservoir to the upper reservoir to avoid demand during the daytime peak, thus achieving peak-shaving and valley-filling.

[0003] Since the water diversion pipe and the pressure pipe are both inclined downward, mud and sand (including stones, branches and other debris) are not easy to stay in the water diversion pipe and the pressure pipe and will not cause blockage. However, the tailwater pipe is inclined upward, and mud and sand are not easy to be discharged from the tailwater pipe, resulting in mud and sand accumulation in the tailwater pipe, which gradually solidifies and grows to form an overall structure, forming a large adhesion between the tailwater pipe and the tailwater pipe. The accumulated mud and sand will not continue to grow to completely block the tailwater pipe. Because when the upper reservoir releases water, the huge pressure will flush away most of the mud and sand, but the accumulated mud and sand will still reduce the diameter of the tailwater pipe, causing a certain amount of blockage in the tailwater pipe, resulting in resistance to the flow of water, resulting in a decrease in power generation, and also consuming more electricity when pumping water at night. In addition, when pumping water at night, the accumulated mud and sand may also enter the turbine in reverse, causing damage to the turbine. Therefore, it is necessary to clean the tailwater pipe regularly to avoid mud and sand accumulation in the tailwater pipe and to avoid blockage of the tailwater pipe.

[0004] Currently, tailwater pipes are manually unblocked. By closing valves at the upper and lower reservoirs, pumping out the water, and then entering the pipe through a surge tank, workers manually dig out the silt. This labor-intensive process is also laborious, slippery, and odorous, making the work dangerous. Consequently, existing methods of unblocking tailwater pipes are laborious and dangerous. Summary of the Invention

[0005] The object of the present invention is to provide a device and method for dredging pipelines in a pumped storage power station. The present invention has the advantages of high efficiency, low labor intensity, no danger, low failure rate and low cost.

[0006] The technical solution of the present invention is as follows: a pipeline dredging device for a pumped-storage power station comprises a tracked vehicle with a remote control function, a container with a top opening is provided on the top of the tracked vehicle, a collecting mechanism is provided on the front side of the tracked vehicle, a conveying mechanism is provided between the collecting mechanism and the tracked vehicle, a light source and a video device with a wireless transmission function are provided on the tracked vehicle, and also comprises a control mechanism connected to the conveying mechanism.

[0007] In the aforementioned pumped storage power station pipeline dredging device, the collection mechanism includes two side beams located on both sides of the tracked vehicle in the width direction. The side beams are inclined and the front ends are in contact with the ground. An arc-shaped shovel plate is provided between the two side beams and the shovel plate is located at the front ends of the side beams.

[0008] In the aforementioned pumped storage power station pipeline dredging device, a downwardly inclined slide is provided at the rear end of the shovel plate, and guide plates are provided on both sides of the slide. An eight-shaped material channel is formed between the two guide plates, and the front end opening of the material channel is larger than the rear end opening of the material channel.

[0009] In the aforementioned pumped storage power station pipeline dredging device, a long hole for guiding is provided on the side beam, two guide shafts are provided in the long hole, and both guide shafts are fixed to the side wall of the crawler vehicle.

[0010] In the aforementioned pumped-storage power station pipeline dredging device, the conveying mechanism includes a belt conveyor located between the crawler vehicle and the slide, the lower end of the belt conveyor is located on the lower side of the slide, and the upper end of the belt conveyor is located on the upper side of the container. The belt of the belt conveyor is provided with multiple material boxes with top openings.

[0011] In the aforementioned pipeline dredging device for a pumped storage power station, the upper end of the material box and the side close to the belt conveyor are hinged to the belt of the belt conveyor.

[0012] In the aforementioned pumped-storage power station pipeline dredging device, electric telescopic cylinders are provided on both sides of the belt conveyor, the belt conveyor and the telescopic cylinder are connected by a control mechanism, one end of the telescopic cylinder is hinged to the crawler vehicle, and the other end of the telescopic cylinder is hinged to the belt conveyor, and a bracket fixed to the container is provided above the telescopic cylinder, and the bracket is hinged to the side wall of the belt conveyor.

[0013] In the aforementioned pumped storage power station pipeline dredging device, a rotating shaft is provided between the two side beams, a roller is provided on the rotating shaft, and the rotating shaft is located between the crawler vehicle and the belt conveyor.

[0014] The aforementioned method for dredging the pipeline dredging device of the pumped storage power station utilizes a crane to hoist the dredging device into the tailwater pipeline, drives the collecting mechanism forward by a crawler vehicle, scoops up the silt in the tailwater pipeline through the collecting mechanism, and stores it in a container through a conveying mechanism, thereby completing the dredging of the tailwater pipeline.

[0015] In the aforementioned dredging method for the pipeline dredging device of the pumped storage power station, before the dredging device is hoisted into or out of the tailwater pipeline, the collection mechanism is used to drive the conveying mechanism to move backward, so that the dredging device is in a minimum volume state.

[0016] Compared to the prior art, the present invention adds a light source, a video device, a collection mechanism, and a conveying mechanism to an existing tracked vehicle. The light source illuminates the interior of the tailwater pipe, and the video device allows the interior of the tailwater pipe to be observed, allowing workers on the ground to remotely operate the tracked vehicle. The collection device collects the accumulated sediment in the tailwater pipe and transfers it to a container using the conveying mechanism. Once the container is full or the pipe is cleared, the tracked vehicle is hoisted out. This makes the clearing process efficient and labor-intensive, and eliminates the need for workers to enter the pipe, eliminating danger. Furthermore, through structural optimization, the present invention reduces the resistance of the tracked vehicle during movement, increasing the operating time of the clearing device; reduces the size of the clearing device, facilitating its hoisting operation, and avoiding collisions and failures during hoisting, resulting in a lower failure rate; and makes the structure of the clearing device relatively simple and low-cost. Therefore, the present invention has the advantages of high efficiency, low labor intensity, no danger, a low failure rate, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view schematic diagram of Example 1.

[0018] Figure 2 It is a top view schematic diagram of Example 1.

[0019] Figure 3 It is a front view schematic diagram of Example 1 at the minimum volume.

[0020] Figure 4 It is a front view schematic diagram of Example 2.

[0021] Figure 5 It is a front view schematic diagram of Example 2 at the minimum volume.

[0022] Figure 6 This is a structural diagram of a pumped storage power station.

[0023] The marks in the accompanying drawings are: 1-crawler, 2-container, 3-light source, 4-video device, 5-side beam, 6-shovel plate, 7-slide plate, 8-guide plate, 9-material channel, 10-long hole, 11-guide shaft, 12-belt conveyor, 13-material box, 14-telescopic cylinder, 15-bracket, 16-rotating shaft, 17-roller. DETAILED DESCRIPTION

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

[0025] Example 1. Pumped storage power station pipeline dredging device, such as Figure 1 As shown, the crawler vehicle 1 includes a remote-controlled crawler vehicle 1. This crawler vehicle 1 is a conventional technology, powered by batteries. Forward, reverse, and steering movements are achieved through a remote control. It is readily available for purchase. A container 2 with an open top is located on top of the crawler vehicle 1. A collection mechanism is located on the front of the crawler vehicle 1. A conveyor mechanism is located between the collection mechanism and the crawler vehicle 1. The crawler vehicle 1 is equipped with a light source 3 and a video device 4 with wireless transmission capabilities. The control mechanism is also connected to the conveyor mechanism. The video device 4 is a network camera, which connects to the external network via an ST58T8G-N wireless bridge.

[0026] The collection mechanism includes two side beams 5 located on both sides of the tracked vehicle 1 in the width direction. The side beams 5 are inclined and the front ends are in contact with the ground. An arc-shaped shovel plate 6 is provided between the two side beams 5. The curvature of the shovel plate 6 matches the inner hole diameter of the tailwater pipe. The shovel plate 6 is located at the front ends of the side beams 5.

[0027] A downwardly inclined slide plate 7 is provided at the rear end of the shovel plate 6 , and guide plates 8 are provided on both sides of the slide plate 7 . An eight-shaped material channel 9 is formed between the two guide plates 8 , and the front end opening of the material channel 9 is larger than the rear end opening of the material channel 9 .

[0028] The side beam 5 is provided with a long hole 10 for guiding, and two guide shafts 11 are provided in the long hole 10. The two guide shafts 11 are fixed to the side wall of the crawler vehicle 1. It is better to put a shaft sleeve for rotation connection on the guide shaft 11.

[0029] The conveying mechanism includes a belt conveyor 12 positioned between the crawler vehicle 1 and the slide 7. The lower end of the belt conveyor 12 is positioned below the slide 7, and the upper end of the belt conveyor 12 is positioned above the container 2. The belt of the belt conveyor 12 is provided with a plurality of open-topped material boxes 13. The material boxes 13 are flat, i.e., they are relatively wide but relatively thin, and have a rectangular shape when viewed from the left. Because the guide plate 8 allows the sediment to enter the slide 7 and move toward the center and accumulate, the width of the belt conveyor 12 can be relatively small, thereby reducing the procurement cost of the belt conveyor 12 and the weight of the belt conveyor 12, thereby increasing the endurance of the crawler vehicle 1.

[0030] The upper end of the material box 13 and the side close to the belt conveyor 12 are hinged to the belt of the belt conveyor 12. When the material box 13 is in front of the belt conveyor 12, under the action of gravity, the bottom plate of the material box 13 fits the belt conveyor 12, and the opening of the material box 13 is upward, which is convenient for receiving the fallen mud and sand. The state of the material box 13 is close to being placed horizontally. When the material box 13 is at the rear side of the belt conveyor 12, under the action of gravity, the opening of the material box 13 is forward, and the state of the material box 13 is vertically suspended. After the material box 13 is hinged to the belt conveyor 12, the upper end of the belt conveyor 12 can be better extended above the container 2, ensuring that the mud and sand will not fall out of the container 2 and re-enter the tailwater pipe, further improving the dredging efficiency.

[0031] Both sides of the belt conveyor 12 are equipped with electric telescopic cylinders 14, which are powered by the battery of the crawler vehicle 1. The telescopic cylinders 14 and the belt conveyor 12 are both connected to a control mechanism. One end of the telescopic cylinder 14 is hinged to the crawler vehicle 1, and the other end of the telescopic cylinder 14 is hinged to the belt conveyor 12. Above the telescopic cylinder 14 is a bracket 15 fixed to the container 2, and the bracket 15 is hinged to the side wall of the belt conveyor 12. The control mechanism includes a controller fixed to the crawler vehicle 1. The telescopic cylinder 14 and the belt conveyor 12 are both connected to the power supply of the crawler vehicle 1 through the controller. The controller is equipped with a wireless receiving module and a wireless transmitting module that matches the wireless receiving module. The wireless transmitting module is equipped with an extension switch, a retraction switch, a start switch, and a stop switch. When the extend switch is pressed, the wireless transmitter module sends a first signal. After the wireless receiver module receives the first signal, the controller extends the telescopic cylinder 14. When the retract switch is pressed, the wireless transmitter module sends a second signal, causing the controller to retract the telescopic cylinder 14. When the start switch is pressed, the wireless transmitter module sends a third signal, causing the controller to start the belt conveyor 12. When the stop switch is pressed, the wireless transmitter module sends a fourth signal, causing the controller to stop the belt conveyor 12. The control principle of the control mechanism is very basic, so it will not be described in detail.

[0032] A rotating shaft 16 is provided between the two side beams 5 , and a roller 17 is provided on the rotating shaft 16 . The rotating shaft 16 is located between the crawler vehicle 1 and the belt conveyor 12 .

[0033] Dredging method: A crane is used to lower the dredging device into the tailwater pipe. A crawler vehicle drives the collection mechanism forward, scooping up the sediment in the tailwater pipe. The collection mechanism then transfers the sediment to a container via a conveying mechanism, completing the dredging of the tailwater pipe. The dredging device is then lifted out of the tailwater pipe by a crane. Before the dredging device is lowered into or out of the tailwater pipe, the collection mechanism drives the conveying mechanism backward to minimize the dredging device's volume.

[0034] Working Principle: A worker controls the retraction of telescopic cylinder 14, rotating belt conveyor 12. Belt conveyor 12 becomes vertical and approaches tracked vehicle 1. Belt conveyor 12 then drives shaft 16 backward, which in turn drives side beam 5 backward, causing shovel 6 to move backward and upward, bringing the dredging device to its minimum volume. Light source 3 illuminates the tailwater pipe, and the internal conditions of the tailwater pipe are observed through video device 4. The forward movement of tracked vehicle 1 is controlled. When sediment accumulation is detected within the tailwater pipe, telescopic cylinder 14 is controlled to extend, causing the lower end of belt conveyor 12 to rotate forward. Gravity forces the conveying mechanism downward, and shovel 6 contacts the bottom of the tailwater pipe. As tracked vehicle 1 advances, sediment is scooped up by shovel 6, moves upward along shovel 6, enters slide plate 7, and slides downward into hopper 13 of belt conveyor 12. Belt conveyor 12 is then activated, and the sediment is transported to container 2. When the accumulated silt in this section is shoveled away, the dredging device is changed to the minimum volume state and continues to move forward until it encounters the next section of silt, and then shovels it again. When the dredging device is in the minimum volume state, the shovel plate 6 does not contact the tailwater pipe, reducing the movement resistance, improving the endurance of the crawler vehicle 1, and increasing the operating time of the dredging device.

[0035] Example 2. Unlike Example 1, the slotted hole 10 contains only a guide shaft 11 and no roller 17. The rotating shaft 16 is rotatably connected to the side beam 5. When the telescopic cylinder 14 contracts, the side beam 5 rotates, resulting in a smaller dredging device capable of entering the tailwater pipe from a smaller diameter surge tank. The dredging device then deploys before entering the tailwater pipe and contacting its bottom surface. However, during the dredging process, the shovel blade 6 is forced to maintain contact with the tailwater pipe bottom surface, resulting in a continuously high travel resistance for the crawler vehicle 1 and reduced endurance.

Claims

1. A pumped storage power station pipeline dredging device, characterized by: The invention comprises a crawler vehicle (1) with a remote control function, a container (2) with a top opening being provided on the top of the crawler vehicle (1), a collecting mechanism being provided on the front side of the crawler vehicle (1), a conveying mechanism being provided between the collecting mechanism and the crawler vehicle (1), a light source (3) and a video device (4) with a wireless transmission function being provided on the crawler vehicle (1), and a control mechanism connected to the conveying mechanism; The collecting mechanism comprises two side beams (5) located on both sides of the crawler vehicle (1) in a width direction, the side beams (5) are inclined and the front ends thereof are in contact with the ground, an arc-shaped shovel plate (6) is provided between the two side beams (5), and the shovel plate (6) is located at the front ends of the side beams (5); The side beam (5) is provided with a long hole (10) for guiding, and two guide shafts (11) are provided in the long hole (10), and the two guide shafts (11) are fixed to the side wall of the crawler vehicle (1); The conveying mechanism includes a belt conveyor (12), and electric telescopic cylinders (14) are provided on both sides of the belt conveyor (12). One end of the telescopic cylinder (14) is hinged to the crawler vehicle (1), and the other end of the telescopic cylinder (14) is hinged to the belt conveyor (12). A rotating shaft (16) is provided between the two side beams (5), and a roller (17) is provided on the rotating shaft (16). The rotating shaft (16) is located between the crawler vehicle (1) and the belt conveyor (12).

2. The pipeline dredging device for a pumped storage power station according to claim 1, characterized in that: A downwardly inclined slide plate (7) is provided at the rear end of the shovel plate (6), and guide plates (8) are provided on both sides of the slide plate (7). An eight-shaped material channel (9) is formed between the two guide plates (8), and a front end opening of the material channel (9) is larger than a rear end opening of the material channel (9).

3. The pipeline dredging device for a pumped storage power station according to claim 1, characterized in that: The belt conveyor (12) is located between the crawler vehicle (1) and the slide (7), the lower end of the belt conveyor (12) is located on the lower side of the slide (7), the upper end of the belt conveyor (12) is located on the upper side of the container (2), and a plurality of material boxes (13) with top openings are provided on the belt of the belt conveyor (12).

4. The pipeline dredging device for a pumped storage power station according to claim 3, characterized in that: The upper end of the material box (13) and one side close to the belt conveyor (12) are hinged to the belt of the belt conveyor (12).

5. The pipeline dredging device for a pumped storage power station according to claim 3, characterized in that: The telescopic cylinder (14) and the belt conveyor (12) are both connected to the control mechanism. A bracket (15) fixed to the container (2) is provided above the telescopic cylinder (14). The bracket (15) is hinged to the side wall of the belt conveyor (12).

6. The dredging method of the pipeline dredging device of a pumped storage power station according to any one of claims 1 to 5, characterized in that: The dredging device is hoisted into the tailwater pipe by a crane, and the collection mechanism is driven forward by a crawler vehicle. The silt in the tailwater pipe is shoveled up by the collection mechanism and stored in a container through the conveying mechanism to complete the dredging of the tailwater pipe. The dredging device is then hoisted out of the tailwater pipe by a crane.

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