CN211472432U

CN211472432U - Structure for reducing highest surge water level of surge chamber

Info

Publication number: CN211472432U
Application number: CN201921096511.2U
Authority: CN
Inventors: 李高会; 王佳伟; 余雪松; 赵瑞存; 裘杭杰
Original assignee: PowerChina Huadong Engineering Corp Ltd
Current assignee: PowerChina Huadong Engineering Corp Ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2020-09-11
Anticipated expiration: 2029-07-12

Abstract

The utility model provides a structure for reducing the highest surge water level of a surge chamber, which comprises a shared upper chamber communicated with vertical shafts of adjacent independent surge chambers, a ventilation hole connected with the upper chamber and double water retaining doors arranged in the upper chamber; one end of the ventilation hole is communicated with one side of the double water retaining doors in the upper chamber, which is close to the vertical shaft of one of the pressure adjusting chambers, and the other end of the ventilation hole is provided with a single water retaining door with the height higher than that of the double water retaining doors; the top wall of the vent hole is flush with the top wall of the upper chamber. The technical scheme of the utility model, not only reduced construction cost and cycle, the regulation of the highest surge water level in surge-chamber when can effectively handling different degree accident operating modes reduces moreover, can also make things convenient for the maintenance and the detection in surge-chamber later stage simultaneously.

Description

Structure for reducing highest surge water level of surge chamber

Technical Field

The utility model relates to a structure that is arranged in reducing the highest surge water level in surge-chamber among the power station system, especially the surge-chamber of formula of burying.

Background

The underground cavern group is the underground space excavated from the massif, and under the premise of meeting the function, the scale of the underground cavern group is reduced as much as possible, so that the construction difficulty can be reduced, the construction risk is reduced, the investment is saved, the dual purposes of safety and economy are achieved, in addition, the existing large-scale hydraulic and hydroelectric engineering is built according to the service life of 100 years, and the convenience of later-stage operation and maintenance is also a considerable problem.

At present, in order to reduce the height of a shaft, an upper chamber is arranged in a pressure regulating chamber of a hydropower station, but in consideration of the flexibility and complexity of operation and scheduling of the hydropower station, an upper chamber 1 is usually arranged in each pressure regulating chamber of a water diversion power generation system, and a concrete retaining wall 3 is arranged at the intersection position of the upper chamber 1 and a ventilation hole 2 to prevent overflow (as shown in fig. 1). This arrangement, while relatively simple, has the following problems:

1. the arrangement structure needs independent upper chambers, two upper chambers need to be constructed respectively, and the construction is troublesome;

2. when the unit increases or decreases the load, the accident load shedding or the accident power failure (pumped storage power station), the highest surge water level of the surge chamber needs to be stored by respective upper chambers, and the sharing cannot be realized, so that the scale of the surge chamber is large;

3. due to the arrangement of the concrete retaining wall, the concrete retaining wall needs to be dismantled when large-scale equipment or materials are required to be conveyed to the pressure regulating chamber vertical shaft 4 in later maintenance, and the concrete retaining wall needs to be rebuilt after the maintenance is completed, so that great waste is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the shortcoming that exists among the prior art, provide a simple structure, construction convenience and be favorable to the surge-chamber to maintain the structure that is used for reducing the highest surge water level in surge-chamber of overhauing.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

a structure for reducing the highest surge water level of a surge chamber comprises a shared upper chamber communicated with vertical shafts of adjacent independent surge chambers, a ventilation hole connected with the upper chamber and double water blocking doors arranged in the upper chamber; one end of the vent hole is communicated with one side of the double water retaining doors in the upper chamber, which is close to the vertical shaft of one of the pressure adjusting chambers; the ventilation tunnel is close to a section of the interior of the upper chamber, a single water baffle door with the elevation higher than that of the double water baffles is arranged in the section of the interior of the upper chamber, and the top wall of the ventilation tunnel is flush with the top wall of the upper chamber.

Further, the vent hole is vertically connected with the upper chamber.

Furthermore, the bottom surface of the ventilation hole close to one section of the upper chamber is a steep slope extending to the upper chamber; the one-way water retaining door is positioned at the tail end of the top of the slope.

The utility model discloses following beneficial effect has:

(1) only one shared and independent upper chamber structure needs to be constructed, and compared with the existing method that the upper chambers are respectively arranged in single pressure regulating chambers, the construction is obviously more convenient and the period is short;

(2) because the top elevation of the one-way water retaining door is higher than that of the two-way water retaining door, when general accident conditions occur, the water retaining of the two-way water retaining door cannot generate water communication of two surge chambers, and independent operation can be realized; when the surge water level of the surge chamber is higher under the non-ordinary small-probability working condition, the water can be retained by the one-way water retaining door of the ventilation hole, and the upper chamber space is shared to realize sharing, so that the shared upper chamber excavation space is ensured to be smaller;

(3) the shared upper chamber roof is flush with the ventilation tunnel roof, so that the gas can be discharged and supplemented when the shared upper chamber space and the water level of the pressure regulating chamber fluctuate, and the operation of reducing the highest surge water level is ensured;

(4) because two-way manger plate door and one-way manger plate door can open, the vehicle alright with transport to surge-chamber shaft well head for the barricade is just avoided demolising in the simple operation of later maintenance, effectively shortens maintenance cost and repair time.

Drawings

Fig. 1 is a structural arrangement diagram of the prior art.

Fig. 2 is a structural layout diagram of the present invention.

Fig. 3 is a schematic structural view of a section of the middle ventilation tunnel near the upper chamber.

Detailed Description

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

Reference is made to the accompanying drawings. The utility model discloses be equipped with the sharing upper chamber 1 of independent setting, connect the ventilative hole 2 of upper chamber and set up two water gates 3 in the upper chamber. Wherein, before the adjacent first tunnel 4 and second tunnel 5 branch into the main transformer 6 and main workshop 7, a first surge-chamber vertical shaft 8 and a second surge-chamber vertical shaft 9 are respectively arranged. Specifically, the common upper chamber 1 communicates with a first pressure regulating chamber shaft 8 and a second pressure regulating chamber shaft 9 which are adjacent and independent from each other and are located above the first and second pressure regulating chamber shafts. One end of the ventilation hole 2 is vertically communicated with the upper chamber 1, and a single water stop door 10 with the height higher than that of the double water stop doors 3 is arranged in the ventilation hole. Wherein, a section bottom surface that the venthole 2 is close to upper chamber 1 is a steep slope 20 that extends to upper chamber 1, and the roof of this section venthole 2 flushes high with the roof of upper chamber 1 to guarantee gaseous discharge and the tonifying qi when make full use of sharing upper chamber space and surge-chamber water level are undulant. The single water blocking door 10 is arranged at the tail end of the steep slope 20, and the sizes of the single water blocking door 10 and the double water blocking doors 3 are specifically determined according to the size of a transport vehicle, so that the vehicle can pass through smoothly, and the subsequent maintenance and overhaul are facilitated.

In particular, the double water blocking doors 3 and the ventilation holes 2 are arranged at the same side of the upper chamber 1, so that the effective regulation of the highest surge water level is ensured. Specifically, when the double water stop door 3 is arranged in the middle of the upper chamber 1 and is biased to the second surge chamber shaft 9, the vent tunnel 2 is also biased to the upper chamber position where the second surge chamber 9 is connected between the double water stop door 3 and the second surge chamber shaft 9; when the double water deflector door 3 is disposed offset to the first surge-chamber shaft 8 in the middle of the upper chamber 1, the ventilation tunnel 2 is also offset to the upper chamber position where the first surge-chamber 8 is connected between the double water deflector door 3 and the first surge-chamber shaft 8.

It should be noted that the above describes exemplifying embodiments of the invention. However, it should be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, which are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the scope of the present invention, and the changes and modifications are intended to fall within the scope of the present invention as claimed.

Claims

1. A structure for reducing the highest surge water level of a surge chamber is characterized by comprising a common upper chamber communicated with vertical shafts of adjacent independent surge chambers, a ventilation hole connected with the upper chamber and double water blocking doors arranged in the upper chamber; one end of the ventilation hole is communicated with one side, close to a vertical shaft of one of the pressure adjusting chambers, of the double water retaining doors in the upper chamber; and a single water retaining door with the elevation higher than the double water retaining doors is arranged in one section of the ventilation hole close to the upper chamber, and the top wall of the ventilation hole is flush with the top wall of the upper chamber.

2. The structure for lowering the highest surge water level in surge chambers according to claim 1 wherein said aeration holes are vertically connected to said upper chamber.

3. The structure for lowering the highest surge water level in a surge chamber as claimed in claim 1, wherein the bottom surface of said ventilation hole is a steep slope extending toward said upper chamber; the single water retaining door is positioned at the tail end of the top of the slope.