Inclined inlet and diversion tunnel combined pumped storage power station blow-off pipe arrangement type

Abstract

The inclined inlet and diversion tunnel combined pumped storage power station blow-off pipe arrangement type comprises a diversion tunnel and a blow-off pipe, the diversion tunnel is composed of a diversion tunnel water inlet tower, a diversion tunnel plug and a diversion tunnel body, and the inclined inlet and diversion tunnel combined pumped storage power station blow-off pipe arrangement type is characterized in that the blow-off pipe is composed of an inlet section, a transition section, an inclined straight section, a turning section and a long gentle slope section which are sequentially connected; the oblique straight section is obliquely arranged in a mountain, penetrates through the diversion tunnel plug and then is connected with the long gentle slope section arranged below a diversion tunnel body through the turning section; a cable-stayed flat bulkhead gate is arranged at the inlet section, a bulkhead gate hoist room is arranged at the top of the mountain, a gate groove is obliquely formed in the portion, between the bulkhead gate hoist room and the inlet section, of the natural slope, and the bulkhead gate hoist room is used for pulling the cable-stayed flat bulkhead gate to slide in the inclination direction of the gate groove. Therefore, whether water flows through the blow-off pipe is controlled. The structure arrangement is simple and convenient, the engineering amount is small, the structure is safe, and construction is convenient.

Description

Technical Field

[0001] This invention relates to the field of water conservancy and hydropower engineering technology, specifically to a pumped storage power station with a combination of inclined inlet and diversion tunnel, and a water discharge pipe arrangement. Background Technology

[0002] Pumped-storage power stations store and reuse electrical energy through two reservoirs at different elevations and a pumping / power generation system between them. The lower reservoir's spillway structures need to meet multiple functional requirements, including flood discharge, emptying, balancing water levels between the upper and lower reservoirs, and ensuring ecological flow. To maximize the use of building materials at the dam site and control project investment, and given that reservoir dams are generally not very high, the lower reservoir dam is usually constructed using locally sourced materials and includes a hydraulic tunnel for diversion. After completion, this tunnel is typically converted into a permanent spillway. Furthermore, discharge pipes are usually installed along the reservoir banks to enhance operational flexibility.

[0003] During the operation and scheduling of the pumped storage power station, due to its flexible operation, stable discharge, low inlet elevation, and the primary functions of ensuring ecological flow in the river channel, balancing water levels in the upper and lower reservoirs, and emptying the reservoir, the discharge pipe also serves as a flood discharge function. Therefore, the safe operation of the discharge pipe directly affects the reliability, safety, and economic benefits of the pumped storage power station. However, the layout and design of the discharge pipe often encounter the following challenges in the design of pumped storage power stations: (1) Axis layout: The axis of the water discharge pipe should be as short as possible, while avoiding geological faults, diversion channels and construction tunnels. If it passes through the dam body and dam foundation, it may affect the stress distribution of the dam body and increase the risk of dam instability. (2) Inlet layout: The size of the discharge pipe and the scale of water discharge are not large. The engineering cost of conventional inlet types such as vertical shaft, shore tower and tower is high. In addition, the corresponding slope and vertical shaft excavation must avoid the vertical spillway and diversion tunnel water tower. Under certain terrain and geological conditions, it is even impossible to arrange them. (3) Construction layout: In order to realize traffic on the top of the tower (well), it is usually necessary to set up additional traffic bridges, highways, etc., which involves a large amount of work and is inconvenient to construct. Summary of the Invention

[0004] To address the common challenges in the design and layout of water discharge pipes, such as axis arrangement, inlet arrangement, and construction layout, this invention provides a water discharge pipe layout for pumped storage power stations that combines an inclined inlet with a diversion tunnel.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: A pumped storage power station with a combined inclined inlet and a diversion tunnel has a water discharge pipe arrangement, comprising a diversion tunnel and a water discharge pipe, characterized in that: the inlet end of the water discharge pipe is located on the mountain slope above the diversion tunnel, and the outlet end of the water discharge pipe is located below the diversion tunnel; a control mechanism for controlling whether water flows through the water discharge pipe is provided on the mountain slope.

[0006] Preferably, the diversion tunnel consists of a diversion tunnel inlet tower, a diversion tunnel plug, and a diversion tunnel body. The discharge pipe consists of an inlet section, a transition section, a straight section, a turning section, and a long gentle slope section connected in sequence. The inlet section is located on the mountain slope above the diversion tunnel. The straight section is arranged obliquely inside the mountain. One end of the straight section is connected to the inlet section, and the other end passes through the diversion tunnel plug and then connects to the long gentle slope section located below the diversion tunnel body through the turning section.

[0007] Preferably, the elevation of the inlet section is higher than the dead water level of the reservoir.

[0008] Preferably, the turning angle of the turning segment is less than 60°.

[0009] Preferably, the horizontal inclination angle of the inclined straight section is less than 45°.

[0010] Preferably, the control mechanism includes a sloping flat maintenance gate installed on the slope of the mountain and a maintenance gate opening and closing machine room installed on the top of the mountain. A gate slot is inclinedly arranged on the slope between the maintenance gate opening and closing machine room and the inlet section. The maintenance gate opening and closing machine room is used to pull the sloping flat maintenance gate to slide along the inclined direction of the gate slot to control whether the water discharge pipe is filled with water.

[0011] Preferably, the horizontal inclination angle of the gate slot is greater than 45°.

[0012] Preferably, the plane axis of the water outlet pipe coincides with the plane axis of the guide hole.

[0013] The proposed arrangement of the discharge pipe for pumped storage power stations, combining an inclined inlet and a diversion tunnel, effectively solves the challenges in the layout and design of discharge pipes for pumped storage power stations, and offers the following advantages: (1) Simple and convenient layout: The plane axis of the water discharge pipe is directly adopted from the axis of the guide hole, without the need for separate comparison; (2) Small workload: Avoid large-scale excavation of slopes and shafts, no need to pour towers, traffic bridges and other structures, the water pipe is directly laid under the bottom plate of the diversion tunnel, no need to excavate a special water pipe channel; (3) Structural safety: The water discharge pipe is arranged below the diversion tunnel and protected by the outer layer of concrete. The outer layer of concrete is integrated with the concrete of the diversion tunnel, resulting in high structural safety. (4) Convenient construction: The long, gentle slope section of the water discharge pipe is poured and installed together with the diversion tunnel, and the maintenance gate well is directly laid out on the natural slope after appropriate excavation, avoiding the construction of construction traffic facilities and large machinery operation platforms. Attached Figure Description

[0014] Figure 1 This is a plan view of the layout of the water discharge pipe of the pumped storage power station according to the present invention.

[0015] Figure 2 This is a cross-sectional schematic diagram of the water discharge pipe arrangement of the pumped storage power station according to the present invention.

[0016] In the diagram: 1-Reservoir, 2-Water discharge pipe, 21-Inlet section, 22-Gradual transition section, 23-Sloping straight section, 24-Turning section, 25-Long gentle slope section, 3-Diversion tunnel, 31-Diversion tunnel inlet tower, 32-Diversion tunnel plug, 33-Diversion tunnel body, 4-Gate slot, 5-Inclined flat maintenance gate, 6-Maintenance gate opening and closing machine room, 7-Mountain. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solutions of the present invention, preferred embodiments of the present invention are described below in conjunction with specific examples. However, it should be understood that the accompanying drawings are for illustrative purposes only and should not be construed as limiting the present patent. For better illustration of this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting the present patent.

[0018] like Figure 1-2 As shown, a pumped storage power station with a combined inclined inlet and diversion tunnel has a discharge pipe arrangement including a diversion tunnel 3, a discharge pipe 2, and a control mechanism. The inlet end of the discharge pipe 2 is located on the slope above the diversion tunnel, and the outlet end of the discharge pipe is located below the diversion tunnel; a control mechanism is installed on the slope to control whether water flows through the discharge pipe.

[0019] In some embodiments, the diversion tunnel 3 consists of a diversion tunnel inlet tower 31, a diversion tunnel plug 32, and a diversion tunnel body 33, while the discharge pipe 2 consists of an inlet section 21, a transition section 22, a straight section 23, a turning section 24, and a long, gentle slope section 25 connected in sequence. The plane axis of the discharge pipe 2 coincides with the plane axis of the diversion tunnel 3, and the plane axis of the discharge pipe 2 directly adopts the plane axis of the diversion tunnel 3, without the need for separate comparison, making the arrangement simple and convenient.

[0020] In some embodiments, the inlet section is located on the mountain slope above the diversion tunnel, and the inclined straight section is arranged obliquely inside the mountain. One end of the inclined straight section is connected to the inlet section, and the other end passes through the diversion tunnel plug and connects to the long, gentle slope section located below the diversion tunnel body via a turning section. The long, gentle slope section 25 is directly laid below the bottom slab of the diversion tunnel 3, eliminating the need to excavate a dedicated drainage pipe 2 channel, thus reducing the workload and simplifying construction. The drainage pipe 2 is arranged below the diversion tunnel 3 and protected by an outer layer of concrete. The outer layer of concrete is integrated with the concrete of the diversion tunnel 3, resulting in high structural safety.

[0021] In some embodiments, the elevation of the inlet section 21 needs to be higher than the dead water level of the reservoir to prevent the inlet from being blocked by silt or other debris at the bottom of the reservoir.

[0022] In some embodiments, the horizontal inclination angle of the inclined straight segment 23 ( Figure 2 The angle of the middle β) is less than 45 degrees, which is in line with the maintenance gate slot 4 on the one hand, and facilitates the maintenance of the inclined and straight sections of the drain pipe during operation on the other hand.

[0023] In some embodiments, the control mechanism includes a inclined flat maintenance gate 5 and a maintenance gate opening and closing machine room 6. The inclined flat maintenance gate 5 is installed on the mountain slope, and the maintenance gate opening and closing machine room 6 is installed on the top of the mountain 7. A gate slot 4 is inclinedly arranged on the natural slope between the maintenance gate opening and closing machine room 6 and the inlet section 21. The inclined flat maintenance gate 5 is installed inside the gate slot 4. The maintenance gate opening and closing machine room 6 is used to pull the inclined flat maintenance gate 5 to slide along the inclined direction of the gate slot 4 to control whether the water discharge pipe 2 passes through. The gate slot 4 is directly laid out according to the appropriately excavated natural slope, avoiding the construction of construction traffic facilities and large machinery operation platforms, avoiding large-scale excavation of slopes and shafts, and eliminating the need for the construction of tower shafts and traffic bridges. The project workload is small and the construction is convenient.

[0024] In some embodiments, the turning angle of the turning segment 24 ( Figure 2 The angle (θ) should be less than 60° to ensure a smooth water flow transition and avoid sudden pressure changes.

[0025] In some embodiments, the horizontal inclination angle of the gate slot 4 ( Figure 2 The angle of α is greater than 45° to ensure that the maintenance gate 5 can be smoothly closed by its own weight.

[0026] The drive structure and drive method between the maintenance gate opening and closing machine room and the inclined flat maintenance gate described in this invention can be selected using conventional methods in the field and should not be regarded as the innovation of this invention. This is understandable to those skilled in the art, and this invention patent will not be further elaborated in detail.

[0027] Based on the description and accompanying drawings of this invention, those skilled in the art can easily manufacture or use the pumped storage power station discharge pipe arrangement of the present invention, which combines an inclined inlet and a diversion tunnel, and can produce the positive effects described in this invention.

[0028] Unless otherwise specified, in this invention, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this invention are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the accompanying drawings and according to the specific circumstances.

[0029] Unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] The above description is merely a preferred embodiment of the present invention, but the present invention is not limited to the specific embodiments described above. Those skilled in the art can make various modifications, additions, or substitutes with similar methods without departing from the principles of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A pumped storage power station discharge pipe arrangement combining an inclined inlet and a diversion tunnel, comprising a diversion tunnel (3) and a discharge pipe (2), characterized in that: The inlet end of the water pipe (2) is located on the slope of the mountain (7) above the diversion tunnel (3), and the outlet end of the water pipe (2) is located below the diversion tunnel (3); a control mechanism for controlling whether the water pipe (2) passes through is provided on the slope of the mountain (7).

2. The arrangement of the discharge pipe of the pumped storage power station combining the inclined inlet and the diversion tunnel as described in claim 1, characterized in that: The diversion tunnel (3) consists of a diversion tunnel inlet tower (31), a diversion tunnel plug (32), and a diversion tunnel body (33). The discharge pipe (2) consists of an inlet section (21), a transition section (22), a straight section (23), a turning section (24), and a long gentle slope section (25) connected in sequence. The inlet section (21) is located on the slope of the mountain (7) above the diversion tunnel (3). The straight section (23) is arranged at an angle inside the mountain (7). One end of the straight section (23) is connected to the inlet section (21), and the other end passes through the diversion tunnel plug (32) and then connects to the long gentle slope section (25) located below the diversion tunnel body (33) through the turning section (24).

3. The arrangement of the discharge pipe of the pumped storage power station combining the inclined inlet and the diversion tunnel as described in claim 2, characterized in that: The elevation of the inlet section (21) is higher than the dead water level of the reservoir (1).

4. The arrangement of the discharge pipe of the pumped storage power station combining the inclined inlet and the diversion tunnel as described in claim 2, characterized in that: The turning angle of the turning segment (24) is less than 60°.

5. The arrangement of the discharge pipe of the pumped storage power station combining the inclined inlet and the diversion tunnel as described in claim 2, characterized in that: The horizontal inclination angle of the oblique straight section (23) is less than 45°.

6. The arrangement of the discharge pipe of the pumped storage power station combining the inclined inlet and the diversion tunnel as described in claim 2, characterized in that: The control mechanism includes a sloping flat maintenance gate (5) installed on the slope of the mountain (7) and a maintenance gate opening and closing machine room (6) installed on the top of the mountain (7). A gate slot (4) is inclinedly arranged on the slope between the maintenance gate opening and closing machine room (6) and the inlet section (21). The maintenance gate opening and closing machine room (6) is used to pull the sloping flat maintenance gate (5) to slide along the inclined direction of the gate slot (4) to control whether the water discharge pipe (2) is filled with water.

7. The arrangement of the discharge pipe of the pumped storage power station combining the inclined inlet and the diversion tunnel as described in claim 6, characterized in that: The horizontal inclination angle of the gate slot (4) is greater than 45°.

8. The arrangement of the discharge pipe of the pumped storage power station combining the inclined inlet and the diversion tunnel as described in claim 1, characterized in that: The plane axis of the water outlet pipe (2) coincides with the plane axis of the diversion hole (3).

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