T-shaped connection impedance type surge chamber structure

Abstract

The utility model relates to a T-shaped connection impedance type surge chamber 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 T-shaped connection impedance type surge chamber structure. According to the technical scheme, the T-shaped connection impedance type surge chamber structure comprises a diversion tunnel vertical shaft section, a T-shaped connection structure and a T-shaped connection structure, the surge chamber is connected to the upper end of the diversion tunnel vertical shaft section, and the surge chamber and the diversion tunnel vertical shaft section are coaxially arranged; one end of the diversion tunnel upper flat section is connected to the upper part of the diversion tunnel vertical shaft section; and the backfill concrete is arranged on the inner wall of the diversion tunnel vertical shaft section, is opposite to the diversion tunnel upper flat section, and is used for forming a turning channel for communicating the diversion tunnel vertical shaft section with the diversion tunnel upper flat section and a communicating channel for communicating the surge chamber with the turning channel in the diversion tunnel vertical shaft section.

Description

TECHNICAL FIELD

[0001] The utility model relates to a T-shaped connection impedance type surge chamber structure. BACKGROUND

[0002] Pumped storage power station provides solid foundation for stable operation of national power system.

[0003] Surge chamber is a common pressure regulating structure of hydropower station, which is usually arranged on the pressure conduit and has the functions of reflecting water hammer wave on free water surface (or air cushion layer) to limit water hammer wave from entering pressure diversion channel and improving operation condition and power supply quality of unit under load change.

[0004] Usually, the surge chamber is arranged far away from the vertical shaft, which can ensure that the surge chamber part has good flow pattern during stable operation, but the reflection effect of the surge chamber on water hammer is affected to a certain extent during hydraulic transient process. In addition, the construction of the vertical shaft usually needs to set up a special construction adit, and the construction safety degree is not high. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem in the prior art that: in view of the above problems, a T-shaped connection impedance type surge chamber structure is provided.

[0006] The utility model adopts the technical scheme that: a T-shaped connection impedance type surge chamber structure, characterized by comprising:

[0007] A water diversion tunnel vertical shaft section;

[0008] A surge chamber connected to the upper end of the water diversion tunnel vertical shaft section and coaxially arranged with the water diversion tunnel vertical shaft section;

[0009] A water diversion tunnel upper horizontal section connected to the upper part of the water diversion tunnel vertical shaft section;

[0010] Backfill concrete arranged on the inner wall of the water diversion tunnel vertical shaft section and opposite to the water diversion tunnel upper horizontal section, used for forming a turning channel connecting the water diversion tunnel vertical shaft section and the water diversion tunnel upper horizontal section and a communication channel connecting the surge chamber and the turning channel in the water diversion tunnel vertical shaft section.

[0011] The surface of the backfill concrete is covered with a steel plate.

[0012] The inner wall of the communication channel is covered with a steel plate.

[0013] The communication channel is an arc-shaped channel, the upper end of the arc-shaped channel is connected to the surge chamber, and the lower end of the arc-shaped channel faces the port of the water diversion tunnel upper horizontal section.

[0014] The diameter of the communication passage is 35%-45% of the upper horizontal section of the water diversion tunnel, and the turning radius of the communication passage is 25%-35% of the turning passage radius.

[0015] The beneficial effect of the utility model is: the pressure regulating chamber in the utility model is connected to the upper end of the vertical shaft section of the water diversion tunnel and arranged coaxially with the vertical shaft section of the water diversion tunnel, the arrangement structure can take the pressure regulating chamber as an important passage for vertical shaft excavation and lining construction, and facilitates safe and reliable and high-efficiency construction operation; and can fully play the water hammer protection role of the pressure regulating chamber, and provides a powerful condition for unit operation. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The structure schematic view of the embodiment.

[0017] 1 - pressure regulating chamber, 2 - communication passage, 3 - upper horizontal section of water diversion tunnel, 4 - backfill concrete, 5 - vertical shaft section of water diversion tunnel, 6 - turning passage, 7 - steel plate. DETAILED DESCRIPTION

[0018] In order to better understand the technical scheme of the present application, the embodiments of the present application will be described in detail below with reference to the drawings.

[0019] It should be clear that the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0021] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0022] It should be noted that the "upper", "lower", "left", "right" and other orientation words described in the embodiments of the present application are described in the angle shown in the drawings, and should not be understood as a limitation on the embodiments of the present application. In addition, it should also be understood in the context that when referring to an element connected to another element "on" or "below", it can not only be directly connected to another element "on" or "below", but also indirectly connected to another element "on" or "below" through an intermediate element.

[0023] As Figure 1 shown, the present embodiment provides a T-shaped connection impedance type surge chamber structure, comprising: a diversion tunnel shaft section, a surge chamber, a diversion tunnel upper section and backfill concrete, etc.

[0024] In this example, the surge chamber structure is arranged at the connection part of the diversion tunnel upper section and the diversion tunnel shaft section, and the surge chamber is coaxially arranged above the diversion tunnel shaft section.

[0025] In the present embodiment, backfill concrete is arranged on the inner wall of the diversion tunnel shaft section and opposite to the port of the diversion tunnel upper section, which forms an arc-shaped turning channel connecting the diversion tunnel shaft section and the diversion tunnel upper section in the diversion tunnel shaft section, and forms a communication channel connecting the surge chamber and the turning channel in the diversion tunnel shaft section.

[0026] In this example, the communication channel is an arc-shaped channel, the upper end of which is connected to the surge chamber, and the lower end of which is directed to the port of the diversion tunnel upper section.

[0027] In the present embodiment, the diameter of the communication channel is 35% to 45% of the diameter of the diversion tunnel, which is used for reflecting water hammer waves, and the radius of the communication channel should be 25% to 35% of the turning radius of the turning channel, so as to smooth the flow state.

[0028] In the present embodiment, the surface of the backfill concrete is coated with a steel plate, and the inner wall of the communication channel is coated with a steel plate, so as to improve the impact resistance and wear resistance of the structure.

[0029] The specific construction and control method of the present embodiment is as follows:

[0030] (1) Perform excavation construction of the surge chamber, the shaft section connected to the surge chamber below the surge chamber, and the diversion tunnel upper section, wherein the surge chamber and the shaft section are coaxially arranged and can be formed by using the shaft construction channel for excavation construction.

[0031] (2) After the excavation of the surge chamber, the shaft section and the diversion tunnel upper section is completed, backfill concrete is constructed at the intersection of the shaft section and the upper section to form a turning channel and a communication channel, and a steel plate lining is attached to the surface of the backfill concrete and the inner wall of the communication channel to improve the impact resistance and wear resistance of the structure.

Claims

1. A T-junction impedance pressure regulating chamber structure, characterized by, The utility model relates to a water diversion tunnel vertical shaft section, a surge chamber, a water diversion tunnel upper horizontal section, backfill concrete, a steel plate, and a steel plate. The utility model relates to a water diversion tunnel vertical shaft section, a surge chamber, a water diversion tunnel upper horizontal section, backfill concrete, a steel plate, and a steel plate. The utility model relates to a water diversion tunnel vertical shaft section, a surge chamber, a water diversion tunnel upper horizontal section, backfill concrete, a steel plate, and a steel plate. The utility model relates to a water diversion tunnel vertical shaft section, a surge chamber, a water diversion tunnel upper horizontal section, backfill concrete, a steel plate, and a steel plate. The utility model relates to a water diversion tunnel vertical shaft section, a surge chamber, a water diversion tunnel upper horizontal section, backfill concrete, a steel plate, and a steel plate.

2. The T-junction impedance pressure regulation chamber structure according to claim 1, characterized in that: The utility model relates to a water diversion tunnel vertical shaft section, a surge chamber, a water diversion tunnel upper horizontal section, backfill concrete, a steel plate, and a steel plate.

3. The T-junction impedance pressure regulating chamber structure according to claim 1 or 2, characterized in that: The utility model relates to a water diversion tunnel vertical shaft section, a surge chamber, a water diversion tunnel upper horizontal section, backfill concrete, a steel plate, and a steel plate.

4. The T-junction impedance pressure regulator chamber structure according to claim 1, characterized in that: The utility model relates to a water diversion tunnel vertical shaft section, a surge chamber, a water diversion tunnel upper horizontal section, backfill concrete, a steel plate, and a steel plate.

5. The T-junction impedance pressure regulator chamber structure according to claim 4, characterized in that: The utility model relates to a water diversion tunnel vertical shaft section, a surge chamber, a water diversion tunnel upper horizontal section, backfill concrete, a steel plate, and a steel plate. The utility model relates to a water diversion tunnel vertical shaft section, a surge chamber, a water diversion tunnel upper horizontal section, backfill concrete, a steel plate, and a steel plate.

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