In-dam water taking facility structure combining blow-off pipe and diversion bottom hole

Abstract

The utility model belongs to the technical field of reservoir water delivery engineering, and particularly relates to an in-dam water taking facility structure with a blow-off pipe and a diversion bottom hole arranged in a combined mode. An in-dam water taking facility structure combining a blow-off pipe and a diversion bottom hole comprises a water taking pipe and a drainage steel pipe, one end of the water taking pipe is located on the upper portion of an upstream dam face, the other end of the water taking pipe penetrates through a valve chamber to be communicated with the drainage steel pipe, and the valve chamber is located at the downstream position of a maintenance drainage gallery. A service valve, a filter, a control valve and an exhaust valve are sequentially arranged in the valve chamber in the water inlet direction of the water taking pipe, the drainage steel pipe is located on the downstream of the flow guide bottom hole, one end is connected with a gradually-shrunk bottom hole, the other end is located at the bottom of the downstream dam face, and the gradually-shrunk bottom hole is located on the lower portion of the upstream dam face. The water taking pipe penetrates through the valve chamber in the dam body and then is communicated with the drainage steel pipe on the lower portion of the dam body, the opening degree of the flow control valve is controlled in the valve chamber, the water taking flow is adjusted, and water taking is safe and efficient.

Description

Technical Field

[0001] This utility model belongs to the field of reservoir water conveyance engineering technology, and specifically relates to a structure of water intake facility inside the dam that combines a water discharge pipe with a diversion bottom hole. Background Technology

[0002] Gravity dams are a widely used type of reservoir dam, and common gravity dam projects often require water intake and diversion within the dam body. Traditionally, water intake in small and medium-sized reservoir gravity dams typically involves installing a maintenance gate, control gate, and gatehouse at the upstream inlet, or a maintenance gate within the upstream discharge tower and a control valve in the downstream valve chamber. The intake time and flow rate are controlled by opening and closing the gates using a gate hoist. However, these structures, including the discharge tower, gatehouse, and downstream valve chamber, must be located outside the existing dam outline, resulting in significant construction difficulties, high risks, and long construction periods. This can weaken the dam's stability and hinder investment control in the reservoir. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this utility model is to provide a water intake facility structure within a dam that combines a water discharge pipe with a diversion bottom hole. By using a water intake pipe to pass through a valve chamber within the dam body and connect it to a drainage steel pipe at the bottom of the dam body, the water intake flow rate can be adjusted by controlling the opening degree of the flow control valve within the valve chamber, ensuring safe and efficient water intake.

[0004] The technical solution of this utility model is as follows: a water intake facility structure in the dam that combines a water outlet pipe and a diversion bottom hole, including a water intake pipe and a drainage steel pipe. One end of the water intake pipe is located on the upper part of the upstream dam surface, and the other end passes through a valve chamber and is connected to the drainage steel pipe. The valve chamber is located downstream of the maintenance drainage corridor. The valve chamber is provided with a maintenance valve, a filter, a control valve and an air vent valve in sequence along the water inlet direction of the water intake pipe. The drainage steel pipe is located downstream of the diversion bottom hole, with one end connected to a tapering bottom hole and the other end located at the bottom of the downstream dam surface. The tapering bottom hole is located at the lower part of the upstream dam surface.

[0005] The water intake pipe is provided with a funnel-shaped opening at one end of the upstream dam face, and a debris barrier is provided on the outside of the funnel-shaped opening.

[0006] A waterproof sleeve is installed between the water intake pipe and the upstream dam surface anti-seepage layer concrete.

[0007] Expansion joints are installed between the maintenance valve and the filter, and between the control valve and the exhaust valve.

[0008] A steel ladder is installed on the side of the valve chamber near the maintenance drainage corridor. A PVC drainage pipe is pre-embedded in the bottom plate of the valve chamber, and the end of the PVC drainage pipe is connected to the drainage hole of the dam body.

[0009] The water intake pipe is equipped with a tee pipe at one end that passes through the valve chamber, and the water intake pipe is connected to the drainage steel pipe through the tee pipe.

[0010] The technical advantages of this utility model are as follows: 1. By using an internal water intake structure, a trash rack and a funnel-shaped opening are installed on the upstream dam face to introduce reservoir water into the internal water intake pipe. A valve chamber is installed on the downstream side of the internal corridor. The water intake pipe extends into the valve chamber from below the corridor floor. Maintenance valves, filters, flow control valves, air vents, and other pipe accessories are sequentially installed in the valve chamber. The water intake pipe extending out of the valve chamber connects to the drainage steel pipe downstream of the guide hole. The water intake flow rate is adjusted by controlling the opening degree of the flow control valve. 2. The waterproof sleeve of this utility model is installed between the water intake pipe and the upstream anti-seepage layer concrete, which can prevent reservoir water from seeping into the dam body along the gaps around the water intake pipe, thus avoiding erosion and scouring of the dam concrete.

[0011] The following will provide further explanation in conjunction with the accompanying drawings. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall layout of a water intake facility structure within a dam that combines a water outlet pipe with a diversion bottom hole, according to this utility model.

[0013] Figure 2 This is a schematic diagram of the valve chamber of this utility model.

[0014] Figure 3 yes Figure 2 Sectional view along the AA direction.

[0015] Attached reference numerals: 1-Water intake pipe; 2-Trash rack; 3-Flanged opening; 4-Waterproof sleeve; 5-Inspection valve; 6-Filter; 7-Control valve; 8-Air vent valve; 9-Expansion joint; 10-Steel ladder; 11-PVC drainage pipe; 12-Tee pipe; 13-Recessed bottom hole; 14-Drainage steel pipe. Detailed Implementation Example 1

[0016] like Figures 1-3 As shown, a water intake facility structure within a dam, which combines a water outlet pipe with a diversion bottom hole, includes a water intake pipe 1 and a drainage steel pipe 14. One end of the water intake pipe 1 is located on the upper part of the upstream dam face, and the other end passes through a valve chamber and is connected to the drainage steel pipe 14. The valve chamber is located downstream of the maintenance drainage corridor. Inside the valve chamber, along the water inlet direction of the water intake pipe 1, there are sequentially arranged maintenance valve 5, filter 6, control valve 7, and air vent valve 8. The drainage steel pipe 14 is located downstream of the diversion bottom hole, with one end connected to a tapering bottom hole 13 and the other end located at the bottom of the downstream dam face. The tapering bottom hole 13 is located at the lower part of the upstream dam face.

[0017] The valve chamber of this invention is sequentially equipped with a maintenance valve 5, a filter 6, a control valve 7, and an air vent valve 8 along the water inlet direction of the water intake pipe 1. In actual operation, the filter is used to filter out smaller floating objects, sand, and other debris to prevent blockage or wear on the water intake pipe. The water intake flow rate is adjusted by controlling the opening of the flow control valve. The air vent valve is used to remove accumulated air in the pipe and prevent a vacuum from forming inside the pipe. This invention uses a water intake structure inside the dam, with a trash rack and a bell mouth set on the upstream dam face to introduce reservoir water into the water intake pipe inside the dam. A valve chamber is set on the downstream side of the corridor inside the dam. The water intake pipe extends into the valve chamber from below the bottom plate of the corridor. The maintenance valve, filter, flow control valve, air vent valve, and other pipe accessories are sequentially installed in the valve chamber. The water intake pipe extending out of the valve chamber is connected to the drainage steel pipe downstream of the guide hole. The water intake flow rate is adjusted by controlling the opening of the flow control valve. Example 2

[0018] Based on Embodiment 1, in this embodiment, preferably, the water intake pipe 1 is provided with a funnel-shaped opening 3 at one end of the upstream dam face, and a debris barrier 2 is provided on the outside of the funnel-shaped opening 3.

[0019] The water intake pipe 1 of this utility model is provided with a funnel-shaped opening 3 at one end of the upstream dam face. A debris barrier 2 is provided on the outside of the funnel-shaped opening 3. In actual operation, the simple debris barrier at the inlet can prevent large floating objects and other debris from entering the water intake pipe and avoid clogging the pipe. The funnel-shaped opening can improve the inlet water flow conditions, reduce flow resistance, and ensure smooth water flow. Example 3

[0020] Based on Embodiment 1 or Embodiment 2, in this embodiment, preferably, a waterproof sleeve 4 is provided between the water intake pipe 1 and the upstream dam surface anti-seepage layer concrete.

[0021] The present invention provides a waterproof sleeve 4 between the water intake pipe 1 and the upstream dam surface anti-seepage layer concrete, which can prevent reservoir water from seeping into the dam body along the gaps around the water intake pipe and avoid erosion and scouring of the dam concrete. Example 4

[0022] Based on Embodiment 1 or Embodiment 3, in this embodiment, preferably, a telescopic joint 9 is provided between the maintenance valve 5 and the filter 6, and between the control valve 7 and the exhaust valve 8.

[0023] The present invention provides expansion joints 9 between the maintenance valve 5 and the filter 6, and between the control valve 7 and the exhaust valve 8. When pipeline accessories other than the maintenance valve need to be repaired or replaced, the upstream maintenance valve is first closed to stop the water flow, and then the expansion joints are disassembled to facilitate the repair and replacement of the pipeline accessories. Example 5

[0024] Based on Embodiment 1 or Embodiment 4, in this embodiment, preferably, a steel ladder is provided on the side of the valve chamber near the maintenance drainage corridor, and a PVC drainage pipe 11 is pre-embedded in the bottom plate of the valve chamber, with the end of the PVC drainage pipe 11 connected to the drainage hole of the dam body.

[0025] The valve chamber of this invention is equipped with a steel ladder on the side near the maintenance drainage corridor to connect the corridor and the valve chamber floor. A PVC drainage pipe 11 is pre-embedded in the bottom plate of the valve chamber. The end of the PVC drainage pipe 11 is connected to the drainage hole of the dam body. The PVC drainage pipe is used to drain the water accumulated on the ground inside the valve chamber, keep the ground dry, and facilitate the entry of maintenance personnel. Example 6

[0026] Based on Embodiment 1 or Embodiment 5, in this embodiment, preferably, a three-way pipe 12 is provided at one end of the water intake pipe 1 that passes through the valve chamber, and the water intake pipe 1 is connected to the drainage steel pipe 14 through the three-way pipe 12.

[0027] The water intake pipe 1 of this utility model is connected to the drainage steel pipe 14 through a three-way pipe 12, which is simple and convenient to connect.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A structure for a water intake facility within a dam that combines a water discharge pipe with a diversion bottom hole, characterized in that: It includes a water intake pipe (1) and a drainage steel pipe (14). One end of the water intake pipe (1) is located on the upper part of the upstream dam surface, and the other end passes through the valve chamber and is connected to the drainage steel pipe (14). The valve chamber is located downstream of the maintenance drainage corridor. The valve chamber is equipped with a maintenance valve (5), a filter (6), a control valve (7) and an air vent valve (8) in sequence along the water intake direction of the water intake pipe (1). The drainage steel pipe (14) is located downstream of the diversion bottom hole. One end is connected to a tapering bottom hole (13), and the other end is located at the bottom of the downstream dam surface. The tapering bottom hole (13) is located at the lower part of the upstream dam surface.

2. The structure of the water intake facility within the dam, which combines the water discharge pipe with the diversion bottom hole according to claim 1, is characterized in that: The water intake pipe (1) is provided with a funnel mouth (3) at one end of the upstream dam face, and a trash rack (2) is provided on the outside of the funnel mouth (3).

3. The structure of the water intake facility within the dam, which combines the water discharge pipe with the diversion bottom hole according to claim 1, is characterized in that: A waterproof sleeve (4) is provided between the water intake pipe (1) and the upstream dam surface anti-seepage layer concrete.

4. The structure of the water intake facility within the dam, which combines the water discharge pipe with the diversion bottom hole according to claim 1, is characterized in that: Expansion joints (9) are provided between the maintenance valve (5) and the filter (6), and between the control valve (7) and the exhaust valve (8).

5. The structure of a dam-in-water intake facility that combines a water discharge pipe with a diversion bottom hole as described in claim 1, characterized in that: A steel ladder is provided on the side of the valve chamber near the maintenance drainage corridor. A PVC drainage pipe (11) is pre-embedded in the bottom plate of the valve chamber, and the end of the PVC drainage pipe (11) is connected to the drainage hole of the dam body.

6. The structure of a dam-in-water intake facility that combines a water discharge pipe with a diversion bottom hole as described in claim 1, characterized in that: The water intake pipe (1) has a three-way pipe (12) at one end that passes through the valve chamber, and the water intake pipe (1) is connected to the drainage steel pipe (14) through the three-way pipe (12).

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