Water pumping and draining system for draining and overhauling compound trapezoid-section plunge pool of hydropower station

Abstract

The utility model provides a pumping and drainage system for draining and overhauling a compound trapezoid-section plunge pool of a hydropower station, which is characterized by comprising a drainage main pipe arranged along a first slope surface of the plunge pool, a pumping pipe joint is arranged on the drainage main pipe, and a pumping branch pipe is arranged on the pumping pipe joint. The water pumping branch pipe is connected with a buoy pump station on the water surface through a water pumping hose; the lower end of the main drainage pipe extends to the second riding track of the plunge pool, the upper end of the main drainage pipe is located on the first riding track of the plunge pool and connected with a main drainage pipe, one end of the main drainage pipe is connected with the main drainage pipe, and the other end of the main drainage pipe extends out of the plunge pool to achieve drainage. The integral draining of the plunge pool is realized in a mode of mechanically combining the drainage main pipe and the water pumping hose, and draining maintenance conditions are created. The drainage main pipe is only arranged on the second riding track, the second riding track does not need to be arranged in the section of the plunge pool bottom plate, the safety risk of large-radius hoisting operation is avoided, and related economic cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy and hydropower engineering, in particular to a pumping and drainage system used for draining and repairing a compound trapezoidal cross-section water cushion pond in a hydropower station. Background Art

[0002] The cushion pond of a hydropower station is an important building in water conservancy and hydropower projects. The main function of the cushion pond is to eliminate the huge energy of the water flowing from the dam body or spillway to the downstream river channel, and to ensure the safety of the dam and other major buildings as well as the riverbed. As an important energy dissipation facility, the flow characteristics in the cushion pond are related to many factors such as the inflow velocity, inflow angle, cushion pond depth and jet shape, which are very complex. The bottom plate in the pressure impact zone of the cushion pond is at risk of instability and damage. Since the water flow in the cushion pond is generally deep, if there is a large local damage, it is difficult to repair it underwater, and it is generally necessary to drain and overhaul the cushion pond. For compound trapezoidal cross-section cushion ponds, the conventional method of pumping and draining is to directly use a pontoon pump station. Due to the presence of horseways and multi-level slopes, the length increment of the drainage hose configuration is large, which affects the pumping and drainage efficiency and stability of the cushion pond. Summary of the invention

[0003] The problem to be solved by the utility model is to provide a pumping and drainage system for draining and repairing a compound trapezoidal cross-section water cushion pond of a hydropower station, which can solve the problem of extended drainage pipe configuration and improve the drainage efficiency and stability of the water cushion pond.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a pumping and drainage system for draining and repairing a compound trapezoidal cross-section water cushion pond of a hydropower station, comprising a drainage main pipe arranged along the slope of the water cushion pond, a pumping pipe section is arranged on the drainage main pipe, a pumping branch pipe is arranged on the pumping pipe section, and the pumping branch pipe is connected to a buoy pump station on the water surface through a pumping hose;

[0005] The lower end of the drainage main pipe extends to the second horseway position of the water cushion pond, and the upper end is located on the first horseway of the water cushion pond. The upper end of the drainage main pipe is connected to a drainage mother pipe. One end of the drainage mother pipe is connected to the drainage main pipe, and the other end extends to the outside of the water cushion pond to achieve drainage.

[0006] In a preferred solution, there are multiple pumping pipe sections, wherein a pumping pipe section is installed at the end of the drainage main pipe near the second horseway, and the other pumping pipe sections are evenly arranged along the drainage main pipe, and both ends of the pumping pipe section are connected to the drainage main pipe through inter-pipe connecting flanges;

[0007] The end of the water extraction branch pipe is closed by a closing flange plate.

[0008] In a preferred solution, a buoy is tied to the outside of the water suction hose.

[0009] In a preferred solution, the main drainage pipe is also provided with a water pumping pipe section, and the water pumping pipe section is provided with a water pumping branch pipe for connecting a water pumping hose;

[0010] The number of the pumping branch pipes on a single pumping pipe section is multiple and consistent with the number of the buoy pumping stations.

[0011] In a preferred solution, a ladder is also provided on the drainage main pipe.

[0012] The utility model provides a pumping and drainage system for draining and repairing a compound trapezoidal cross-section water cushion pond of a hydropower station, which has the following beneficial effects by adopting the above structure:

[0013] (1) It is equipped with a fixed drainage main pipe and drainage main pipe, which eliminates the need for a long hose section and avoids the hose being folded due to being arranged along the slope, which results in an unstable drainage pipe system and reduced drainage efficiency;

[0014] (2) The drainage main is only arranged to the second horseway, and there is no need to configure the drainage main section between the second horseway and the bottom plate of the water cushion pond, which avoids the safety risks of large-radius lifting operations and saves related economic costs. The drainage above the second horseway is achieved by relying on the drainage main and a hose of conventional length, and the extended hose is configured for pumping and draining below the second horseway. The drainage main and the pumping hose are combined in a flexible manner to achieve the overall drainage of the water cushion pond, create conditions for drainage and maintenance, and ensure the stability of the pumping and drainage system during the entire drainage process;

[0015] (3) A ladder is installed on the drainage main pipe to provide a way for personnel to go up and down, which is convenient for personnel to work when the water pump hose is replaced to different water pump branch pipe interface locations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 It is a schematic diagram of the elevation structure of the utility model.

[0018] Figure 2 It is a side structural schematic diagram of the utility model.

[0019] In the figure: water cushion pond 1, drainage main pipe 2, pumping pipe section 3, pipe connecting flange 4, pumping branch pipe 5, closed flange plate 6, drainage main pipe 7, buoy pump station 8, pumping hose 9, buoy 10, ladder 11, water surface 12, first horseway 13, first slope 14, second horseway 15, second slope 16, bottom plate 17. DETAILED DESCRIPTION

[0020] like Figure 1-2A pumping and drainage system for draining and repairing a double trapezoidal cross-section water cushion pond of a hydropower station comprises a drainage main pipe 2 arranged along the slope of a water cushion pond 1, a pumping pipe section 3 is arranged on the drainage main pipe 2, a pumping branch pipe 5 is arranged on the pumping pipe section 3, and the pumping branch pipe 5 is connected to a buoy pump station 8 on the water surface through a pumping hose 9;

[0021] The lower end of the drainage main pipe 2 extends to the second horseway 15 of the water cushion pond 1, and the upper end is located on the first horseway 13 of the water cushion pond 1. The upper end of the drainage main pipe 2 is connected to a drainage mother pipe 7. One end of the drainage mother pipe 7 is connected to the drainage main pipe 2, and the other end extends to the outside of the water cushion pond 1 to achieve drainage.

[0022] In a preferred solution, there are multiple pumping pipe sections 3, wherein one pumping pipe section 3 is installed at the end of the drainage main pipe 2 near the second horseway 15, and the other pumping pipe sections 3 are evenly arranged along the drainage main pipe 2, and both ends of the pumping pipe section 3 are connected to the drainage main pipe 2 through the inter-pipe connecting flange 4;

[0023] The end of the water extraction branch pipe 5 is closed by a closing flange plate 6 .

[0024] In a preferred solution, a buoy 10 is tied to the outside of the water suction hose 9 .

[0025] In a preferred solution, the main drainage pipe 7 is also provided with a water pumping pipe section 3, and the water pumping pipe section 3 is provided with a water pumping branch pipe 5 for connecting a water pumping hose 9;

[0026] The number of the pumping branch pipes 5 on a single pumping pipe section 3 is multiple and consistent with the number of the buoy pumping stations 8 .

[0027] In a preferred solution, a ladder 11 is further provided on the slope of the water cushion pond 1 on one side of the drainage main pipe 2 .

[0028] In the preferred solution, the drainage main pipe 2 is arranged from the first horseway 13 along the first slope 14 to the second horseway 15, and the drainage main pipe 2 is omitted in the second slope 16 between the second horseway 15 and the water cushion pond bottom plate 17. The drainage above the second horseway 15 is achieved by relying on the drainage main pipe 2 and a hose of conventional length, and the part below the second horseway 15 is equipped with an extended hose for pumping and draining.

[0029] The installation process of the pumping and drainage system disclosed in the utility model for draining and repairing the compound trapezoidal cross-section water cushion pond of a hydropower station is as follows:

[0030] 1. After the construction preparation is completed, first complete the installation of the drainage main pipe 7 on the first horseway 13, and then use a crane to lift the buoy pump station 8 equipped with a water pump to the water surface 12 of the cushion pond 1.

[0031] 2. All the pumping branches 5 on the drainage main pipe 2 are closed by the closed flange plate 6. The drainage main pipe 2 is hoisted to the water surface 12 of the water cushion pond 1 by a crane. After the upper end is fixed, water is poured into the pipe to make it settle. After the pipe settles in place, it is reinforced and connected to the drainage main pipe 7 to ensure that the drainage main pipe 2 is stably installed on the first slope 14.

[0032] 3. After the drainage main pipe 2 is installed, the water suction hose 9 is hoisted, one end of the water suction hose 9 is connected to the buoy pump station 8, and the other end is connected to the water suction branch pipe 5 of the drainage main pipe 7. Several buoys 10 are installed under the water suction hose 9 to float and maintain stability.

[0033] 4. Complete the installation and commissioning of supporting equipment and facilities such as distribution cabinets and cables, and start pumping water.

[0034] 5. When the water level drops to the point where all the pumping branches 5 of the pumping pipe section 3 of the drainage main pipe 2 are exposed, replace the interface of the pumping hose 9, and use a crane to lift and pull one end of the pumping hose 9 located at the drainage main pipe 7 to the first pumping pipe section 3 of the drainage main pipe 2 to complete the connection with the pumping branch pipe of the drainage main pipe 2, and close the pumping branch pipe 5 on the drainage main pipe 7 through the closing flange plate 6, and so on until the pumping hose 9 is replaced to the pumping branch pipe 5 at the end of the drainage main pipe 2 near the second horseway 15, and the joint will not be replaced subsequently.

[0035] 6. After the second horseway 15 is exposed, a steel ladder passage is installed along the first slope 14 to facilitate people to go up and down. As the water level continues to drop, the length of the pumping hose 9 is increased to prevent the buoy pump station from contacting the second slope 16 until the buoy pump station 8 falls on the bottom plate 17 of the cushion pond 1 to complete the drainage.

Claims

1. A pumping and drainage system for draining and repairing a compound trapezoidal cross-section water cushion pond in a hydropower station, characterized by: It comprises a drainage main pipe (2) arranged along a first slope (14) of a water cushion pond (1), the drainage main pipe (2) being provided with a pumping pipe section (3), the pumping pipe section (3) being provided with a pumping branch pipe (5), the pumping branch pipe (5) being connected to a buoy pump station (8) on the water surface via a pumping hose (9); The lower end of the drainage main pipe (2) extends to the position of the second horseway (15) of the water cushion pond (1), and the upper end is located on the first horseway (13) of the water cushion pond (1). The upper end of the drainage main pipe (2) is connected to a drainage main pipe (7), one end of the drainage main pipe (7) is connected to the drainage main pipe (2), and the other end extends to the outside of the water cushion pond (1) to achieve drainage.

2. A pumping and drainage system for draining and repairing a compound trapezoidal cross-section water cushion pond of a hydropower station according to claim 1, characterized in that: There are a plurality of pumping pipe sections (3), wherein one pumping pipe section (3) is installed at the end of the drainage main pipe (2) near the second horseway (15), and the other pumping pipe sections (3) are evenly arranged along the drainage main pipe (2), and both ends of the pumping pipe section (3) are connected to the drainage main pipe (2) via an inter-pipe connecting flange (4); The end of the water extraction branch pipe (5) is closed by means of a closed flange plate (6).

3. A pumping and drainage system for draining and repairing a compound trapezoidal cross-section water cushion pond of a hydropower station according to claim 1, characterized in that: A buoy (10) is tied to the outside of the water suction hose (9).

4. A pumping and drainage system for draining and repairing a compound trapezoidal cross-section water cushion pond of a hydropower station according to claim 1, characterized in that: The main drainage pipe (7) is also provided with a water pumping pipe section (3), and the water pumping pipe section (3) is provided with a water pumping branch pipe (5) for connecting to a water pumping hose (9); The number of the water pumping branch pipes (5) on a single water pumping pipe section (3) is multiple and is consistent with the number of the buoy pumping stations (8).

5. The pumping and drainage system for draining and repairing a compound trapezoidal cross-section water cushion pond of a hydropower station according to claim 1, characterized in that: The drainage main pipe (2) is also provided with a ladder (11).

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