Double-chamber pressure regulating structure

Abstract

The utility model relates to a double-chamber pressure regulating structure. The method is suitable for the technical field of water conservancy and hydropower engineering. The technical problem to be solved by the application is to provide a double-chamber pressure regulating structure. According to the technical scheme, the double-chamber pressure regulating structure comprises a connecting pipe which is obliquely arranged, and the lower end of the connecting pipe communicates with a diversion tunnel; the upper chamber is provided with at least two upper chamber cavities, the first end of each upper chamber cavity is communicated with the upper end of the connecting pipe, the second end of each upper chamber cavity is a hole, and each upper chamber cavity is obliquely arranged downwards from the second end to the first end of the upper chamber cavity; the lower chamber is provided with at least three lower chamber cavities, the first end of each lower chamber cavity is communicated with the lower portion of the connecting pipe, and the lower chamber cavities are evenly distributed with the connecting pipe as the center.

Description

Technical Field

[0001] This utility model relates to a dual-chamber pressure regulating structure. It is applicable to the field of water conservancy and hydropower engineering technology. Background Technology

[0002] In modern engineering construction, surge tanks are commonly used regulating structures in hydropower stations. Upstream surge tanks serve two purposes: firstly, to supply water to the generating units under increased load; and secondly, to act as water hammer regulating structures in the water conveyance system, reducing pressure changes and output vibrations in the pipeline and ensuring the safe operation of the power station.

[0003] Currently, traditional surge chambers often face the problem of ineffective discharge of surging gas, leading to unstable gas flow and affecting system efficiency and safety. Furthermore, the construction and maintenance of traditional surge chambers are cumbersome, easily causing project delays and increased costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a dual-chamber pressure regulating structure to address the above-mentioned problems.

[0005] The technical solution adopted in this utility model is: a dual-chamber pressure regulating structure, characterized in that it includes:

[0006] The connecting pipe is arranged at an angle, and its lower end connects to the water diversion tunnel;

[0007] The upper chamber has at least two upper chambers, the first end of each upper chamber is connected to the upper end of the connecting pipe, the second end of each upper chamber is an opening, and each upper chamber is arranged obliquely downward from its second end to its first end;

[0008] The lower chamber has at least three lower chambers, the first end of each lower chamber is connected to the lower part of the connecting tube, and the lower chambers are evenly distributed around the connecting tube.

[0009] The angle between the axis of the connecting pipe and the horizontal plane is 45° to 60°.

[0010] The upper chamber is provided with a longitudinal slope of 1% to 2%.

[0011] The opening of the upper chamber is equipped with a one-way water-blocking door.

[0012] The cross-section of the upper chamber is shaped like a city gate.

[0013] The lower chamber is a frustum structure whose diameter gradually decreases from its first end to its second end.

[0014] The beneficial effects of this utility model are: the lower chamber is evenly arranged in at least three directions, which improves the overall stability and allows water to enter and exit the lower chamber as quickly as possible to replenish the connecting pipe; at the same time, the truncated cone structure of the lower chamber facilitates the outflow of water and gas during the surging process, avoiding stagnant air.

[0015] In this invention, the upper chamber, due to its significant burial depth, is designed with a two-way gate-shaped cross-section and a longitudinal slope of 1%–2%, facilitating the smooth flow of water into the connecting pipe. Simultaneously, a one-way water-blocking gate, approximately 3 meters high, is installed at the opening. This gate is normally closed but opens during maintenance, enhancing the system's safety, convenience, and flexibility while ensuring the stable operation of the hydraulic system.

[0016] In this invention, the connecting pipe is arranged at an angle of 45° to 60°, which facilitates construction and operation and increases the area of ​​the stable section of the connecting pipe.

[0017] This invention effectively absorbs water hammer effects by reducing turbulence and pressure fluctuations, maintaining system stability while reducing equipment wear and extending service life. Furthermore, it simplifies operation, facilitates maintenance, and improves overall operational economy and safety. The system also consumes less energy than traditional designs, making it more energy-efficient.

[0018] The two openings in the upper chamber of this application have different elevations, which can leverage the time difference effect of high surge waves to accelerate their decay. Attached Figure Description

[0019] Figure 1 This is a side view of the embodiment.

[0020] Figure 2 This is a schematic diagram of the floor plan layout for an embodiment.

[0021] 1. Connecting pipe; 2. Upper chamber; 3. Lower chamber; 4. Water diversion tunnel. Detailed Implementation

[0022] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0023] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0024] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0025] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0026] like Figure 1 , 2 As shown, this embodiment provides a dual-chamber pressure regulating structure, which is suitable for hydropower stations with high water head, small required stable cross-section, and large reservoir water level changes. Specifically, it includes a connecting pipe, an upper chamber, and a lower chamber.

[0027] In this example, the connecting pipe is arranged at an angle, with its axis making an angle of 45° to 60° with the horizontal plane, and the lower end of the connecting pipe is connected to the water diversion tunnel of the hydropower station.

[0028] In this embodiment, the upper chamber has two upper chambers with a city gate-shaped cross section. The first end of each upper chamber is connected to the upper end of the connecting pipe, and the second end of each upper chamber is an opening. Each upper chamber is arranged obliquely downward from its second end to its first end, with a longitudinal slope of 1% to 2%, which facilitates the smooth flow of water into the upper chamber into the connecting pipe.

[0029] In this example, a one-way water-blocking gate is installed at the opening of the upper chamber. The water-blocking gate is normally closed, but is opened during maintenance to improve the safety, convenience and flexibility of the system, while ensuring the stable operation of the hydraulic system.

[0030] In this embodiment, the lower chamber has three lower chamber cavities. The first end of each of the three lower chamber cavities is connected to the lower part of the connecting pipe, and the three chamber cavities are evenly distributed around the connecting pipe. The axis of each lower chamber cavity is horizontal, and the lower chamber cavity is a frustum structure with a diameter that gradually decreases from its first end to its second end.

Claims

1. A dual-chamber pressure regulating structure, characterized in that, include: The connecting pipe is arranged at an angle, and its lower end connects to the water diversion tunnel; The upper chamber has at least two upper chambers, the first end of each upper chamber is connected to the upper end of the connecting pipe, the second end of each upper chamber is an opening, and each upper chamber is arranged obliquely downward from its second end to its first end; The lower chamber has at least three lower chambers, the first end of each lower chamber is connected to the lower part of the connecting tube, and the lower chambers are evenly distributed around the connecting tube.

2. The dual-chamber pressure regulating structure according to claim 1, characterized in that: The angle between the axis of the connecting pipe and the horizontal plane is 45° to 60°.

3. The dual-chamber pressure regulating structure according to claim 1, characterized in that: The upper chamber is provided with a longitudinal slope of 1% to 2%.

4. The dual-chamber pressure regulating structure according to claim 1, characterized in that: The opening of the upper chamber is equipped with a one-way water-blocking door.

5. The dual-chamber pressure regulating structure according to claim 1, characterized in that: The cross-section of the upper chamber is shaped like a city gate.

6. The dual-chamber pressure regulating structure according to claim 1, characterized in that: The lower chamber is a frustum structure whose diameter gradually decreases from its first end to its second end.

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