CN213358543U

CN213358543U - Drain bottom hole structure

Info

Publication number: CN213358543U
Application number: CN202021391221.3U
Authority: CN
Inventors: 叶祥飞; 李品君; 王小平
Original assignee: PowerChina Zhongnan Engineering Corp Ltd
Current assignee: PowerChina Zhongnan Engineering Corp Ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-06-04
Anticipated expiration: 2030-07-15

Abstract

The utility model discloses a sluicing bottom hole structure, a serial communication port, include sluicing steel pipe (1) and be located the cone valve (9) in sluicing steel pipe (1) exit, the entry of sluicing steel pipe (1) is provided with accident gate (3), sluicing steel pipe (1) is arranged in concrete side wall (7) of spillway. The utility model discloses it has good regulating action to let out flood and reservoir capacity in advance to the reservoir, and avoided the stone square hole to dig, it is convenient to be under construction, has practiced thrift engineering area of land and investment, has extensive using value in the hydraulic and hydroelectric engineering field.

Description

Drain bottom hole structure

Technical Field

The utility model relates to a sluicing bottom hole structure belongs to hydraulic and hydroelectric engineering outlet structure design technical field.

Background

The drainage bottom hole is a common drainage structure in hydraulic and hydroelectric engineering and is usually arranged in a dam body structure or a mountain. Especially in the pumped storage power station engineering, the dam is a large number of earth-rock dams, flood discharge facilities are difficult to arrange on the dam body, the reservoir generally has pre-discharge requirements on reservoir flood in the operation period in consideration of the requirements of the storage power station on operation flexibility and safety so as to adjust the water level and ensure the power generation benefit, the arrangement mode of combined flood discharge of a bank spillway and a water discharge bottom hole is mostly adopted, and the water discharge bottom hole is usually in a tunnel type. The arrangement of the tunnel is limited by factors such as pivot arrangement, geological conditions, construction period and the like, and the occupied area and investment of the project are increased.

SUMMERY OF THE UTILITY MODEL

In order to overcome the limited scheduling problem of difficulty, time limit for a project and engineering investment of sluicing tunnel arrangement, the utility model provides a sluicing bottom hole structure, concrete technical scheme as follows.

The water drainage bottom hole structure is characterized by comprising a water drainage steel pipe and a conical valve located at the outlet of the water drainage steel pipe, wherein an accident gate is arranged at the inlet of the water drainage steel pipe, and the water drainage steel pipe is arranged in a concrete side wall of a spillway.

In the technical scheme, the water drainage steel pipe is arranged in the concrete side wall of the spillway, and the conical valve is arranged at the downstream outlet to control the reservoir flood to be drained in advance, so that the underground cavern excavation (tunnel excavation) is avoided, the construction period is saved, and the engineering investment is reduced.

Furthermore, the diameter of the water drainage steel pipe is not more than 2m, and the wall thickness is not less than 10 mm. And calculating and determining the diameter of the water drainage steel pipe according to the designed lower drainage flow and the pressure head, and determining the wall thickness according to the borne pressure head.

Furthermore, the concrete side wall is a gravity type side wall of a bank spillway, and the distance from the outer wall of the water drainage steel pipe to the outer surface of the concrete side wall is not less than 0.5 m. Thus being beneficial to ensuring the stability of the water drainage steel pipe.

Furthermore, a trash rack is further arranged on the upstream side of the accident gate. The trash rack blocks sundries outside the water drainage steel pipe, and the water drainage steel pipe is prevented from being blocked.

Furthermore, a water-blocking ring is arranged on the outer wall of the initial section of the water drainage steel pipe. The water-blocking ring can prevent water seepage from seeping along the outer wall of the water-draining steel pipe and influencing the antirust performance and stability of the water-draining steel pipe.

Furthermore, the drain bottom hole structure also comprises a drain pipe, wherein the inlet of the drain pipe is positioned at the water blocking ring, and the outlet of the drain pipe is positioned outside the concrete side wall. When water seeps on the outer wall of the initial section of the water drainage steel pipe, the water blocking ring prevents the seeped water from further seeping outwards along the water drainage steel pipe, and the accumulated seeped water can be discharged through the water drainage pipe. The drain pipe can adopt PCV pipe or steel pipe.

The utility model discloses it has good regulating action to let out flood and reservoir capacity in advance to the reservoir, and avoided the stone square hole to dig, it is convenient to be under construction, has practiced thrift engineering area of land and investment, has extensive using value in the hydraulic and hydroelectric engineering field.

Drawings

Fig. 1 is a schematic structural plan view of the present invention;

FIG. 2 is a schematic longitudinal section of the structure of the present invention;

fig. 3 is a sectional view of fig. 1 and 2 taken along line 1-1.

In the figure: 1-a water drainage steel pipe; 2-trash rack; 3-accident gate; 4-a water-blocking ring; 5, a drain pipe; 6-inlet section concrete structure; 7-concrete side walls of spillways; 8, opening and closing the machine room; 9-cone valve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1-3, the utility model relates to a sluicing bottom hole structure in hydraulic and hydroelectric engineering, mainly comprising a sluicing steel pipe 1, the inner diameter and wall thickness of which are determined according to the designed discharge and pressure head calculation, preferably, the diameter of the sluicing steel pipe is not more than 2m, and the wall thickness is not less than 10 mm; the head of the drain bottom hole is provided with a trash rack 2 to prevent sundries from entering the flow channel; an accident gate 3 is arranged at the downstream of the trash rack 2; the outer wall of the initial section of the water drainage steel pipe 1 is provided with a water blocking ring 4, upstream seepage water is drained through a water drainage pipe 5, and the water drainage pipe 5 can be made of PVC or steel pipes as required; the pressure steel pipes 1 are arranged in an inlet section concrete structure 6 and a concrete side wall 7 of a spillway along the line, and the distance from the outer wall of the water drainage steel pipe to the outer surface of the concrete side wall 7 is not less than 0.5m on the premise that the structural size of the side wall meets the requirements of self stability and strength; a conical valve 9 is arranged at the outlet of the water drainage steel pipe 1, an opening and closing machine room 8 is arranged above the conical valve 9, and the downward drainage flow of the water drainage bottom hole can be controlled in the opening and closing machine room 8.

The utility model discloses utilize concrete side wall 7 of spillway to bury sluicing steel pipe 1 underground, will sluicing steel pipe 1 when construction concrete side wall 7 install the concrete of pouring concrete side wall 7 after targetting in place again, utilized concrete side wall 7 to protect and fixed sluicing steel pipe 1 ingeniously to avoid the excavation of sluicing tunnel, not only the cost is reduced has still saved construction period.

The embodiments of the present invention have been described above with reference to the accompanying drawings, and features of the embodiments and examples of the present invention may be combined with each other without conflict. The present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and the scope of the present invention, which is encompassed by the present invention.

Claims

1. The utility model provides a sluicing bottom outlet structure, its characterized in that includes sluicing steel pipe (1) and is located conical valve (9) in sluicing steel pipe (1) exit, the entry of sluicing steel pipe (1) is provided with accident gate (3), sluicing steel pipe (1) arranges in spillway's concrete side wall (7).

2. A drainage bottom hole structure according to claim 1, wherein said drainage steel pipe (1) has a diameter of not more than 2m and a wall thickness of not less than 10 mm.

3. A sluicing bottom hole structure according to claim 1, wherein the concrete side wall (7) is a gravity side wall of a shoreside spillway, and the distance from the outer wall of the sluicing steel pipe (1) to the outer surface of the concrete side wall (7) is not less than 0.5 m.

4. A sluicing bottom hole structure according to claim 1, wherein a trash rack (2) is further provided on the upstream side of the accident gate (3).

5. The structure of the drain bottom hole according to claim 1, wherein the outer wall of the initial section of the drain steel pipe (1) is provided with a water-blocking ring (4).

6. A drainage bottom hole structure according to claim 5, characterized in that it further comprises a drainage pipe (5), the inlet of the drainage pipe (5) being located at the water stop ring (4) and the outlet of the drainage pipe (5) being located outside the concrete side wall (7).

7. The drain bottom hole structure according to claim 6, wherein the drain pipe (5) is made of PCV pipe or steel pipe.