CN219410782U - Self-flow drainage system of horizontal hole maintenance channel is drawn to pumped storage power station - Google Patents

Abstract

The utility model discloses a self-flow drainage system of a drainage channel of a drainage horizontal hole of a pumped storage power station, which comprises a drainage channel, a drainage steel pipe, a water collecting well and a drainage hole. Underground water in the diversion flat tunnel overhaul channel can automatically flow and collect in the water collecting well through the drainage ditches at the two sides of the overhaul channel bottom plate, and water leakage of the permanent plugging body of the diversion flat tunnel overhaul channel can automatically flow and collect in the water collecting well through the drainage steel pipe pre-buried at the lower part of the hollow gallery bottom plate of the permanent plugging body; the water collecting well is positioned at the tail end of the permanent plugging body of the overhaul channel and is connected with the self-flow drainage holes arranged along the slope; the underground water collected in the water collecting well can be discharged to a natural channel outside the hole through the self-flowing drainage hole. The utility model is suitable for a pumped storage power station drainage tunnel maintenance channel with the condition of arranging the self-flow drainage tunnel, aims at utilizing gravity to drain water without inputting mechanical pumping and drainage equipment, reduces the cost of equipment operation maintenance and manual maintenance, reduces the energy consumption of the equipment, can effectively cope with emergency situations such as equipment failure, power failure and the like, and improves the reliability of a drainage system of the maintenance channel.

Description

Self-flow drainage system of horizontal hole maintenance channel is drawn to pumped storage power station

Technical Field

The utility model relates to the field of overhaul channels, in particular to a self-flow drainage system of a horizontal hole overhaul channel of a pumped storage power station.

Background

The water-storage power station diversion flat tunnel overhaul channel is arranged in a permanent-temporary combination mode so as to meet the requirements of traffic transportation in the construction period and permanent overhaul in the running period of the diversion system and save engineering investment. The suction height of a water pump and water turbine unit of the pumped storage power station is large, the installation height is low, and the underground burial depth is often large when the engineering water delivery power generation system is arranged; in addition, due to factors such as engineering surrounding terrain geological conditions, traffic conditions and the like, the diversion flat tunnel overhaul channels are mostly arranged in a reverse slope.

After the construction of the permanent plugging body of the diversion system is completed, the diversion flat tunnel maintenance channel is required to bear the traffic task of maintenance of the permanent plugging body or the diversion system, and therefore, the underground water in the maintenance channel is required to be effectively discharged in time. The maintenance channel of the reverse slope arrangement usually adopts a mechanical pumping drainage mode to drain water, but the mechanical pumping drainage needs to consume a large amount of electric energy, increases equipment cost, and has high operation and maintenance cost, especially for projects with abundant groundwater. In addition, for the sudden conditions such as mechanical failure, power failure and the like, the drainage reliability of the mechanical drainage equipment cannot be ensured.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a gravity drainage system of a drainage tunnel maintenance channel of a pumped storage power station, and aims to utilize gravity to drain automatically so as to reduce the investment and operation and maintenance costs of mechanical pumping and drainage equipment, continuously and stably drain water and improve the reliability of the drainage system of the maintenance channel.

The aim of the utility model is achieved by the following technical scheme. The self-flow drainage system of the horizontal hole-leading overhaul channel of the pumped storage power station comprises an overhaul channel drainage ditch, a drainage steel pipe, a water collecting well and a drainage hole, wherein the overhaul channel drainage ditch is arranged in an overhaul channel arranged on a reverse slope, so that underground water in the overhaul channel can automatically flow and collect in the water collecting well through the overhaul channel drainage ditch; a permanent sealing body hollow gallery is arranged in the permanent sealing body close to the diversion flat hole, and a drainage steel pipe is obliquely arranged in the permanent sealing body hollow gallery, so that the water leakage of the permanent sealing body can automatically flow and collect in the water collecting well through the drainage steel pipe; the water collecting well is communicated with the drainage hole, so that water collected in the water collecting well can be discharged automatically through the drainage hole.

Furthermore, the overhaul channel drainage ditches are positioned on two sides of the overhaul channel concrete bottom plate.

Furthermore, the drainage steel pipe is pre-buried in the concrete bottom plate lower part in the hollow corridor of the permanent plugging body, and the hollow corridor of the permanent plugging body is arranged in a reverse slope and is communicated with the overhaul channel, and the water inlet of the drainage steel pipe is arranged at the tail end of the hollow corridor of the permanent plugging body, so that the leakage water of the permanent plugging body can automatically flow and collect at the water inlet of the drainage steel pipe.

Still further, the water collection well is located at the end of the permanent plug.

Further, the water collecting well adopts a reinforced concrete structure.

Further, the drainage steel pipe is arranged on the water collecting well side with a gradient of at least 2%, and 2 drainage steel pipes are arranged in total.

Furthermore, the drain steel pipe is made of galvanized materials.

Furthermore, the water inlet of the drainage steel pipe is fixedly connected with a reinforcing mesh for preventing clogging.

Furthermore, the drainage holes are arranged along a slope, and the section is a gate hole.

Furthermore, drainage hole drainage ditches are arranged on two sides of the drainage hole concrete bottom plate in the drainage hole.

The beneficial effects of the utility model are as follows:

(1) According to the technical scheme, gravity self-flowing drainage is utilized, the underground water in the overhaul channel and the leakage water of the permanent plugging body are collected in the water collecting well in a self-flowing manner and are discharged from the self-flowing drainage hole, mechanical pumping and drainage equipment is not needed, the cost of equipment operation maintenance and manual overhaul is reduced, meanwhile, the electric energy consumption of the equipment is reduced, and the device is low-carbon and environment-friendly.

(2) The technical scheme can effectively cope with the emergency such as equipment failure, power failure and the like, ensure that the maintenance channel continuously and stably drains water, and improve the reliability of the maintenance channel drainage system.

Drawings

Fig. 1 is a plan view of the present utility model.

Fig. 2 is a schematic cross-sectional structure along the extending direction of the service aisle.

Fig. 3 is a schematic cross-sectional view of the present utility model along the extension direction of the drainage hole.

FIG. 4 is a schematic diagram showing a typical sectional structural arrangement of a drainage tunnel according to the present utility model.

Fig. 5 is a schematic diagram of the water inlet partial structure arrangement of the drainage steel pipe.

Reference numerals illustrate: 1-diversion flat holes; 2-permanent occlusion; 3-overhauling a channel; 4-draining the steel pipe; 5-a water collection well; 6-draining holes; 21-permanent occlusion body hollow gallery; 31-a maintenance channel drainage ditch; 32-repairing the channel concrete bottom plate; 41-reinforcing steel bar meshes; 61-drain hole drain; 62-drainage hole concrete floor.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present utility model, preferred embodiments of the present utility model will be described below with reference to the accompanying drawings and specific examples, but it should be understood that the accompanying drawings are only illustrative and should not be construed as limiting the present utility model; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship described in the drawings are for illustrative purposes only and are not to be construed as limiting the utility model.

As shown in fig. 1-4, the utility model is applied to a diversion tunnel maintenance channel, and provides a self-flow drainage system of the diversion tunnel maintenance channel of a pumped storage power station, which comprises a maintenance channel drainage ditch 31, a drainage steel pipe 4, a water collecting well 5 and a drainage tunnel 6, wherein a reverse slope of the maintenance channel 3 is arranged on one side of the diversion tunnel 1, and the reverse slope arrangement shows that the height of the maintenance channel 3 is gradually reduced along the direction of the diversion tunnel 1.

As an embodiment, the overhaul channel drainage ditch 31 is arranged in the overhaul channel 3 and positioned at two sides of the overhaul channel concrete bottom plate 32; the water collecting well 5 is positioned at the tail end of the permanent plugging body 2, a pit structure of reinforced concrete is adopted, and the underground water in the overhaul channel 3 is self-flowed and collected in the water collecting well 5 through the overhaul channel drainage ditch 31, and the flowing direction of the underground water is as shown in the arrow direction in fig. 1 and 2.

As an implementation mode, a permanent sealing body hollow gallery 21 is arranged in the permanent sealing body 2 close to the diversion flat hole 1, the permanent sealing body hollow gallery 21 is arranged in a reverse slope and communicated with the overhaul channel 3, and a drainage steel pipe 4 is embedded in the permanent sealing body hollow gallery 21 at the lower part of the concrete floor. The water inlet of the drainage steel pipe 4 is arranged at the end of the passage of the hollow gallery 21 of the permanent plugging body, and the water leakage of the permanent plugging body 2 automatically flows and gathers in the water inlet of the drainage steel pipe 4, and the flowing direction of the water leakage is shown in the arrow direction in figure 5 in detail. The drain steel pipe 4 is made of galvanized materials, and the plane of the drain steel pipe 4 is inclined to the water collecting well side at a gradient of 2%, and a water outlet of the drain steel pipe 4 is arranged in the water collecting well 5. The drainage steel pipes 4 are arranged 2 in total to meet the drainage requirement, and the flowing direction of the seepage water in the drainage steel pipes 4 is as shown by the arrow direction in fig. 2.

As an embodiment, as shown in fig. 5, a reinforcing mesh 41 is disposed at the water inlet of the drainage pipe 4, the reinforcing mesh 41 is spot-welded with the drainage pipe 4, and the reinforcing mesh 41 is used for preventing clogging.

As an embodiment, as shown in fig. 4, the drainage holes 6 are arranged along a slope, and the section is a city gate hole type to facilitate engineering construction. The water collecting well 5 is communicated with the water drain hole 6, water drain hole drainage ditches 61 are arranged on two sides of a water drain hole concrete bottom plate 62 in the water drain hole 6, and water collected in the water collecting well 5 can automatically drain to a natural channel outside the hole through the water drain hole 6, and the flowing direction is shown as an arrow direction in fig. 3.

The gravity drainage device aims at utilizing gravity drainage without inputting mechanical pumping equipment, reduces the cost of equipment operation maintenance and manual overhaul, can effectively cope with emergency situations such as equipment faults, power failure and the like, improves the reliability of a drainage system of an overhaul channel, and is very suitable for a water-storage power station diversion flat tunnel overhaul channel with the condition of arranging the gravity drainage tunnel.

It should be noted that the above description is only a preferred embodiment of the present utility model, and is not limited in any way, and those skilled in the art should understand that any simple modification and equivalent changes to the above embodiment according to the technical substance of the present utility model fall within the protection scope of the present utility model.

Claims (10)

1. A pumped storage power station draws horizontal hole to overhaul self-flowing drainage system of passageway, its characterized in that: the self-flow drainage system comprises an overhaul channel drainage ditch (31), a drainage steel pipe (4), a water collecting well (5) and a drainage hole (6), wherein the overhaul channel drainage ditch (31) is arranged in an overhaul channel (3) arranged on a reverse slope, so that groundwater in the overhaul channel (3) can flow and collect in the water collecting well (5) through the overhaul channel drainage ditch (31); a permanent sealing body hollow gallery (21) is arranged in the permanent sealing body (2) close to the diversion flat hole (1), and a drainage steel pipe (4) which is obliquely arranged is arranged in the permanent sealing body hollow gallery (21), so that the water leakage of the permanent sealing body (2) can automatically flow and collect in the water collecting well (5) through the drainage steel pipe (4); the water collecting well (5) is communicated with the water drain hole (6), so that water collected in the water collecting well (5) can be discharged automatically through the water drain hole (6).

2. The pumped storage power station diversion tunnel inspection channel self-flowing drainage system according to claim 1, wherein: the overhaul channel drainage ditches (31) are positioned on two sides of the overhaul channel concrete bottom plate (32).

3. The pumped storage power station diversion tunnel inspection channel self-flowing drainage system according to claim 1, wherein: the drainage steel pipe (4) is pre-buried in the concrete bottom plate lower part in the hollow corridor of permanent shutoff body (21), and the hollow corridor of permanent shutoff body (21) is arranged on a reverse slope and is communicated with the maintenance passageway (3), and the water inlet of the drainage steel pipe (4) is arranged at the tail end of the hollow corridor of permanent shutoff body (21) for the seepage water of the permanent shutoff body (2) can automatically flow and collect in the water inlet of the drainage steel pipe (4).

4. The pumped storage power station diversion tunnel inspection channel self-flowing drainage system according to claim 1, wherein: the water collecting well (5) is positioned at the tail end of the permanent plugging body (2).

5. The pumped storage power station diversion tunnel inspection channel self-flowing drainage system according to claim 4, wherein: the water collecting well (5) adopts a reinforced concrete structure.

6. A pumped storage power station diversion tunnel inspection tunnel self-flowing drainage system as claimed in claim 3, wherein: the drainage steel pipes (4) are arranged on the water collecting well side with a gradient of at least 2 percent, and 2 drainage steel pipes are arranged in total.

7. A pumped storage power station diversion tunnel inspection tunnel self-flowing drainage system as claimed in claim 3, wherein: the drain steel pipe (4) is made of galvanized material.

8. A pumped storage power station diversion tunnel inspection tunnel self-flowing drainage system as claimed in claim 3, wherein: the water inlet of the drainage steel pipe (4) is fixedly connected with a reinforcing mesh (41) for preventing clogging.

9. The pumped storage power station diversion tunnel inspection channel self-flowing drainage system according to claim 1, wherein: the drainage holes (6) are arranged along a slope, and the section of the drainage holes is a gate hole type.

10. The pumped storage power station diversion tunnel inspection channel self-flowing drainage system according to claim 9, wherein: drainage hole drainage ditches (61) are arranged on two sides of a drainage hole concrete bottom plate (62) in the drainage hole (6).