Double-layer water outlet tower structure suitable for debris flow-prone river reach

Abstract

The double-layer water outlet tower structure comprises a tailrace tunnel, a water outlet tower is arranged at an outlet of the tailrace tunnel, the water outlet tower is composed of a catchment well, a lower-layer water outlet and an upper-layer water outlet, the outlet of the tailrace tunnel is communicated with the catchment well, and the catchment well is communicated with the lower-layer water outlet and the upper-layer water outlet. A lower-layer gate groove is formed in the lower-layer water outlet, a lower-layer gate is arranged in the lower-layer gate groove, an upper-layer gate groove is formed in the upper-layer water outlet, an upper-layer gate is arranged in the upper-layer gate groove, and the upper-layer gate and the lower-layer gate are respectively connected with opening and closing equipment. The water outlet tower comprises an upper water outlet and a lower water outlet, the elevation of a bottom plate of the upper water outlet is higher than the designed deposition elevation of debris flow, and when debris flow occurs, a lower gate of the lower water outlet is closed, and an upper gate of the upper water outlet is opened, so that the debris flow is prevented from blocking a tail water outlet, and normal operation of a power station is guaranteed. And the power station operation risk is reduced.

Description

Technical Field

[0001] This utility model relates to a double-layer water outlet tower structure suitable for river sections prone to debris flows, belonging to the field of hydropower engineering technology. Background Technology

[0002] In hydropower projects, debris flow is one of the more common geological disasters. Traditional hydropower stations have a single-layer tailrace outlet structure. Once a debris flow occurs, it can easily cause blockage at the tailrace outlet of the outlet tower, which is difficult to clean. If it is not cleaned in time, the tailrace cannot be discharged, which will lead to the power station not being able to operate normally or even be scrapped. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a double-layer water outlet tower structure suitable for river sections prone to debris flows, which effectively solves the problem of debris flow blocking the tailrace outlet, ensures the normal operation of the power station, and reduces the operational risks of the power station.

[0004] The present invention provides a technical solution for a double-layer outlet tower structure applicable to river sections prone to debris flows: it includes a tailrace tunnel, and an outlet tower is set at the outlet of the tailrace tunnel. The outlet tower consists of a collection well, a lower outlet, and an upper outlet. The outlet of the tailrace tunnel is connected to the collection well, and the collection well is connected to both the lower and upper outlets. A lower gate slot is set in the lower outlet, and a lower gate is set in the lower gate slot. An upper gate slot is set in the upper outlet, and an upper gate is set in the upper gate slot. The upper and lower gates are respectively connected to opening and closing devices.

[0005] Furthermore, the outlet of the tailrace tunnel is funnel-shaped.

[0006] Furthermore, a slag collection pit is installed on the outside of the water outlet tower, and a debris flow detection and early warning device is installed in the slag collection pit.

[0007] Furthermore, the water collection well is rectangular.

[0008] The beneficial effects of this utility model's double-layer outlet tower structure applicable to river sections prone to debris flows are as follows: By setting an outlet tower at the outlet of the tailrace tunnel, the outlet tower has two layers of outlets, with the bottom plate elevation of the upper outlet being higher than the designed sedimentation elevation for debris flows. When a debris flow occurs, the lower gate of the lower outlet is closed, and the upper gate of the upper outlet is opened, thereby preventing debris flows from blocking the tailrace outlet, ensuring the normal operation of the power station, and reducing the operational risks of the power station. Attached Figure Description

[0009] Figure 1 This is a cross-sectional schematic diagram of a double-layer water outlet tower structure suitable for river sections prone to debris flows, according to this utility model. Detailed Implementation

[0010] This utility model relates to a double-layer water outlet tower structure suitable for river sections prone to debris flows, such as... Figure 1 As shown, the system includes a tailrace tunnel 1, with an outlet tower 2 at the outlet of the tailrace tunnel 1. The outlet tower 2 consists of a collection well 3, a lower outlet 4, and an upper outlet 5. The outlet of the tailrace tunnel 1 is connected to the collection well 3, and the collection well 3 is connected to the lower outlet 4 and the upper outlet 5. A lower gate slot 6 is provided in the lower outlet 4, and a lower gate 7 is provided in the lower gate slot 6. An upper gate slot 8 is provided in the upper outlet 5, and an upper gate 9 is provided in the upper gate slot 8. The upper gate 9 and the lower gate 7 are respectively connected to an opening and closing device 10.

[0011] Furthermore, the outlet of the tailrace tunnel 1 is funnel-shaped.

[0012] Furthermore, a slag collection pit 11 is provided on the outside of the water outlet tower 2, and a debris flow detection and early warning device 12 is installed in the slag collection pit 11.

[0013] Furthermore, the water collection well 3 is rectangular.

[0014] This utility model discloses a double-layer outlet tower structure suitable for river sections prone to debris flows. The main feature is an outlet tower 2 installed at the outlet of the tailrace tunnel 1. Inside the outlet tower 2 are a collection well 3, a lower outlet 4, and an upper outlet 5. The collection well 3 is rectangular, and its cross-sectional area should be larger than that of the tailrace tunnel 1. The lower outlet 4 is located at the bottom of the outlet tower 2, and a lower gate 7 for blocking debris flows is installed inside the lower outlet 4. The lower gate 7 is designed to facilitate vertical sliding. Lower-level gate slots 6 are installed on the inner walls of both sides of the lower-level outlet 4. The upper-level outlet 5 is located at the top of the water tower 2. The bottom elevation of the upper-level outlet 5 should be higher than the design sedimentation elevation for debris flow. An upper-level gate 9 for blocking debris flow is installed inside the upper-level outlet 5. To facilitate the vertical sliding of the upper-level gate 9, upper-level gate slots 8 are installed on the inner walls of both sides of the upper-level outlet 5. The upper-level gate slots 8 and the lower-level gate slots 6 are U-shaped. The dimensions of the gate slots should match the dimensions of the gates. Gate 9 and lower gate 7 are arranged in parallel front to back, and similarly, upper gate slot 8 and lower gate slot 6 are arranged in parallel front to back. Lower gate 7 and lower gate slot 6 are located on the upstream side of the power generation water flow of upper gate 9 and upper gate slot 8. Lower gate 7 and upper gate 9 are respectively connected to opening and closing device 10 (the specific structure of the opening and closing device 10 is existing technology, which is used to open the gate upward or close it downward). Under normal circumstances, lower gate 7 is open and upper gate 9 is closed, and tailwater flows through lower outlet 4. When a debris flow occurs and fills the slag collection pit 11, the debris flow detection and early warning device 12 in the slag collection pit 11 (the specific structure of the debris flow detection and early warning device 12 is existing technology, which is used to detect the volume of debris flow in the slag collection pit 11) issues an alarm. At this time, the lower gate 7 is closed by opening and closing device 10 and the upper gate 9 is opened, and tailwater flows through upper outlet 5, thereby enabling the power station to continue to operate and generate electricity. This scheme proposes a double-layer outlet tower structure suitable for river sections prone to debris flows. An outlet tower 2 is installed at the outlet of the tailrace tunnel 1. The outlet tower 2 has two layers of outlets, and the bottom elevation of the upper outlet 5 should be higher than the design sedimentation elevation for debris flows. When a debris flow occurs, the lower gate 7 of the lower outlet 4 is closed, and the upper gate 9 of the upper outlet 5 is opened, thereby preventing debris flows from blocking the tailrace outlet, ensuring the normal operation of the power station, and reducing the operational risks of the power station.

Claims

1. A double-layer water outlet tower structure suitable for river sections prone to debris flows, characterized in that: The system includes a tailrace tunnel (1), and a water tower (2) is installed at the outlet of the tailrace tunnel (1). The water tower (2) consists of a collection well (3), a lower outlet (4), and an upper outlet (5). The outlet of the tailrace tunnel (1) is connected to the collection well (3). The collection well (3) is connected to the lower outlet (4) and the upper outlet (5). A lower gate slot (6) is installed in the lower outlet (4), and a lower gate (7) is installed in the lower gate slot (6). An upper gate slot (8) is installed in the upper outlet (5), and an upper gate (9) is installed in the upper gate slot (8). The upper gate (9) and the lower gate (7) are respectively connected to the opening and closing device (10).

2. The double-layer water outlet tower structure as described in claim 1, suitable for river sections prone to debris flows, is characterized in that: The outlet of the tailrace tunnel (1) is funnel-shaped.

3. The double-layer water outlet tower structure suitable for debris flow-prone river sections as described in claim 1, characterized in that: A slag collection pit (11) is set outside the water outlet tower (2), and a debris flow detection and early warning device (12) is set in the slag collection pit (11).

4. The double-layer water outlet tower structure as described in claim 1, suitable for river sections prone to debris flows, is characterized in that: The water collection well (3) is rectangular.

Images