A pressure regulating chamber structure and pressure pipeline structure with adjustable connection pipe opening position

Abstract

This utility model relates to a pressure regulating chamber structure and a pressure pipeline structure with adjustable connecting pipe opening position. It is applicable to the field of water conservancy and hydropower technology. The technical solution adopted by this utility model is: a pressure regulating chamber structure with adjustable connecting pipe opening position, comprising: a main connecting pipe, arranged above the pressure pipeline along the length direction; at least two connecting branch pipes connected to the side wall of the main connecting pipe along the length direction of the main connecting pipe, the connecting branch pipes being connected to the pressure pipeline; a pressure regulating chamber body, arranged above the main connecting pipe, the pressure regulating chamber body being connected to the main connecting pipe through a connecting conduit; an electric control valve, arranged in each connecting branch pipe, the opening and closing of the connecting branch pipes being achieved by the opening and closing of the electric control valves; and a controller, communicatively connected to each electric control valve, the controller being able to control the opening and closing of the electric control valves.

Description

Technical Field

[0001] This utility model relates to a pressure regulating chamber structure and a pressure pipeline structure with adjustable connection pipe opening position. It is applicable to the field of water conservancy and hydropower technology. Background Technology

[0002] In hydraulic and hydropower projects, surge tanks are commonly used to address water hammer problems during hydraulic transients. Extensive experience has been accumulated in the design and use of surge tanks in hydropower stations. Commonly used surge tank types include simple, impedance-type, water chamber type, differential type, overflow type, and air cushion type. Among these, the impedance-type surge tank is the most widely used. Its basic structure replaces the bottom of the cylindrical surge tank, where it connects to the tunnel and pressure pipeline, with a short pipe with a smaller cross-section or a baffle with a small orifice. This orifice or baffle generates local resistance, i.e., the impedance effect, when water flows through it.

[0003] A key characteristic of impedance-type surge tanks is that water loses some energy as it flows through the impedance orifice. This feature helps reduce the amplitude of water level fluctuations and accelerates the attenuation process, resulting in a smaller overall volume compared to cylindrical surge tanks. This means that it maintains lower head loss during normal operation, improving efficiency.

[0004] However, this design also has its limitations. Due to the impedance, when water hammer occurs, some of the water hammer waves cannot be completely reflected, which may affect the pressure intake channel, subjecting it to additional impact. Especially at the right-angle bend formed by the connection between the upper tunnel and the vertical shaft, the streamlines change sharply due to centrifugal force, causing continuous changes in dynamic water pressure in this area, forming a hydraulically unstable region. If the surge tank connecting pipe (i.e., the impedance hole) is connected to the tunnel in this region, the water flow may continuously enter and exit the surge tank due to the constantly changing pressure at the bottom of the surge tank, causing fluctuations in the surge tank water level and making it impossible to maintain a stable state. Such fluctuations will seriously affect the stable operation and regulation quality of the unit. Summary of the Invention

[0005] The technical problem to be solved by this utility model is: In order to solve the above-mentioned technical problem, this utility model provides a pressure regulating chamber structure and a pressure pipeline structure with an adjustable connection pipe opening position.

[0006] The technical solution adopted in this utility model is: a pressure regulating chamber structure with an adjustable connecting pipe opening position, having:

[0007] The main connecting pipe is arranged above the pressure pipeline along the length of the pressure pipeline. At least two branch connecting pipes are connected to the side wall of the main connecting pipe along the length of the main connecting pipe. The branch connecting pipes are connected to the pressure pipeline.

[0008] The pressure regulating chamber is located above the main connecting pipe and is connected to the main connecting pipe via a connecting conduit.

[0009] Electric control valves are installed in each connecting branch pipe. The opening and closing of the electric control valves can realize the opening and closing of the connecting branch pipes.

[0010] The controller communicates with each electric control valve and can control the opening and closing of the electric control valves.

[0011] The connecting conduit is connected to an impedance plate at the bottom of the pressure regulating chamber. The impedance plate has an impedance hole with a size smaller than the connecting conduit at the position corresponding to the connecting conduit.

[0012] The connecting conduit is connected to the end of the connecting main tube.

[0013] A flushing mechanism is provided at the connection pipe. The flushing mechanism has a booster pump. The inlet end of the booster pump is connected to the water source through the water inlet pipe, and the outlet end of the booster pump is connected to the nozzle through the water outlet pipe. The nozzles are evenly arranged on the side wall of the connection pipe.

[0014] A pressure pipeline structure, employing the aforementioned adjustable connecting pipe opening position pressure regulating chamber structure, has a horizontal conveying tunnel and a vertical water conveying shaft, which are connected by a bend pipe, and each connecting branch pipe of the main connecting pipe is connected to the horizontal section of the bend pipe.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a connecting main pipe along the length of the pressure pipeline between the pressure pipeline and the pressure regulating chamber. At least two connecting branch pipes connected to the pressure pipeline are connected to the side wall of the connecting main pipe, and electric control valves are installed in the connecting branch pipes. This facilitates the control of the opening and closing of each electric control valve according to the operation of the pressure pipeline, and adjusts the connection channel between the pressure regulating chamber and the pressure pipeline. This utility model also provides a flushing mechanism at the connecting main pipe. This facilitates the flushing of the silt deposited in the connecting main pipe by spraying water through nozzles from a booster pump, which effectively alleviates the reduction in the cross-sectional area of ​​the connecting main pipe caused by silt deposition. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the connecting pipe structure of this utility model.

[0018] In the diagram, 1-water conveying tunnel, 2-water conveying shaft, 3-bend, 4-pressure regulating chamber, 41-impedance plate, 42-impedance hole, 5-connecting main pipe, 51-connecting conduit, 52-bend section, 53-horizontal section, 6-connecting branch pipe, 7-electric control valve, 8-nozzle, 9-booster pump, 91-inlet pipe, 92-outlet pipe. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0020] Example 1 is a pressure regulating chamber structure with an adjustable connecting pipe opening position. In this example, it has:

[0021] The main connecting pipe 5 is arranged above the pressure pipeline along the length of the pressure pipeline. At least two branch connecting pipes 6 are connected to the side wall of the main connecting pipe 5 along the length of the main connecting pipe 5. The branch connecting pipes 6 are connected to the pressure pipeline.

[0022] The pressure regulating chamber 4 is located above the connecting main pipe 5, and the pressure regulating chamber 4 is connected to the connecting main pipe 5 through the connecting conduit 51;

[0023] An electric control valve 7 is arranged in each connecting branch pipe 6. The opening and closing of the electric control valve 7 can realize the opening and closing of the connecting branch pipe 6.

[0024] The controller is communicatively connected to each electric control valve 7 and can control the opening and closing of the electric control valves 7. Thus, by controlling the opening and closing of each electric control valve 7, the connection of each connecting branch pipe 6 can be achieved. This allows the corresponding electric control valve 7 to be opened according to the actual fluid conditions in the pressure pipeline, thereby opening the connecting branch pipe 6 and connecting the pressure pipeline, the main connecting pipe 5, and the pressure regulating chamber 4. Furthermore, by opening each connecting branch pipe 6, different connection channels can be created between the pressure pipeline and the pressure regulating chamber 4, resulting in different effects.

[0025] In this embodiment, the connecting conduit 51 is connected to the impedance plate 41 at the bottom of the pressure regulating chamber 4. The impedance plate 41 has an impedance hole 42 with a size smaller than that of the connecting conduit 51 at a position corresponding to the connecting conduit 51.

[0026] In this embodiment, the connecting conduit 51 is connected to the end of the main connecting pipe 5. Thus, when different connecting branch pipes 6 are connected, there are different communication channels between the pressure pipeline and the pressure regulating chamber 4.

[0027] In this embodiment, three connecting branch pipes 6 are provided between the pressure pipeline and the connecting main pipe 5. The three connecting branch pipes 6 are distributed at both ends and the middle part of the horizontal section 53 of the connecting pipe.

[0028] In this embodiment, the connecting branch pipe 6 is connected to the horizontal section 53 of the connecting main pipe 5. The end of the connecting main pipe 5 that is connected to the connecting conduit 51 is made into a bend section 52 to reduce the impact of water flow on the connecting main pipe 5.

[0029] Example 2 is a pressure regulating chamber structure with an adjustable connecting pipe opening position. Based on Example 1, this example includes a flushing mechanism at the connecting main pipe 5. The flushing mechanism has a booster pump 9. The inlet of the booster pump 9 is connected to a water source via an inlet pipe 91, and the outlet of the booster pump 9 is connected to nozzles 8 via an outlet pipe 92. The nozzles 8 are evenly distributed on the side wall of the connecting main pipe 5. Thus, when the water diverted to the power station has a high sand content, silt is easily deposited on the horizontal section 53 of the connecting pipe, leading to a reduction in the cross-sectional area of ​​the connecting pipe and an increase in its hydraulic damping effect. By setting a flushing mechanism at the horizontal section 53 of the connecting main pipe 5, the booster pump 9 can spray water through the nozzles 8 to flush away the silt deposited on the inner wall of the connecting main pipe 5, effectively mitigating the reduction in the cross-sectional area of ​​the connecting main pipe 5 caused by silt deposition.

[0030] Example 3 is a pressure regulating chamber structure with an adjustable connecting pipe opening position. In this example, it has:

[0031] The main connecting pipe 5 is arranged above the pressure pipeline along the length of the pressure pipeline. At least two branch connecting pipes 6 are connected to the side wall of the main connecting pipe 5 along the length of the main connecting pipe 5. The branch connecting pipes 6 are connected to the pressure pipeline.

[0032] The pressure regulating chamber 4 is located above the connecting main pipe 5, and the pressure regulating chamber 4 is connected to the connecting main pipe 5 through the connecting conduit 51;

[0033] An electric control valve 7 is arranged in each connecting branch pipe 6. The opening and closing of the electric control valve 7 can realize the opening and closing of the connecting branch pipe 6.

[0034] The controller is connected in communication with each electric control valve 7, and can control the opening and closing of the electric control valve 7.

[0035] The connecting conduit 51 is connected to the impedance plate 41 at the bottom of the pressure regulating chamber 4. The impedance plate 41 has an impedance hole 42 with a size smaller than that of the connecting conduit 51 at a position corresponding to the connecting conduit 51.

[0036] The connecting conduit 51 is connected to the end of the connecting main tube 5.

[0037] A flushing mechanism is provided at the connecting main pipe 5. The flushing mechanism has a booster pump 9. The inlet end of the booster pump 9 is connected to the water source through the water inlet pipe 91, and the outlet end of the booster pump 9 is connected to the nozzle 8 through the water outlet pipe 92. The nozzle 8 is evenly arranged on the side wall of the connecting main pipe 5.

[0038] Example 4 is a pressure pipeline structure that uses the above-mentioned adjustable connecting pipe opening position pressure regulating chamber structure, which has a horizontal conveying tunnel 1 and a water conveying vertical shaft 2. The horizontal conveying tunnel 1 and the water conveying vertical shaft 2 are connected by a bend 3. Each connecting branch pipe 6 of the main connecting pipe 5 is connected to the horizontal section 53 of the bend 3.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pressure regulating chamber structure capable of adjusting the opening position of a connection pipe, characterized by: have: The connecting main pipe (5) is arranged above the pressure pipeline along the length of the pressure pipeline. At least two connecting branch pipes (6) are connected to the side wall of the connecting main pipe (5) along the length of the connecting main pipe (5). The connecting branch pipes (6) are connected to the pressure pipeline. The pressure regulating chamber (4) is located above the connecting main pipe (5), and the pressure regulating chamber (4) is connected to the connecting main pipe (5) through the connecting conduit (51); Electric control valve (7) is arranged in each connecting branch pipe (6). The opening and closing of the electric control valve (7) can realize the opening and closing of the connecting branch pipe (6). The controller is connected in communication with each electric control valve (7) and can control the opening and closing of the electric control valve (7).

2. The pressure control chamber structure according to claim 1, wherein: The connecting conduit (51) is connected to the impedance plate (41) at the bottom of the pressure regulating chamber (4). The impedance plate (41) has an impedance hole (42) with a size smaller than that of the connecting conduit (51) at the position corresponding to the connecting conduit (51).

3. The pressure control chamber structure according to claim 1, wherein: The connecting conduit (51) is connected to the end of the connecting main tube (5).

4. The pressure control chamber structure according to claim 1, wherein: A flushing mechanism is provided at the connecting main pipe (5). The flushing mechanism has a booster pump (9). The inlet end of the booster pump (9) is connected to the water source through the water inlet pipe (91), and the outlet end of the booster pump (9) is connected to the nozzle (8) through the water outlet pipe (92). The nozzle (8) is evenly arranged on the side wall of the connecting main pipe (5).

5. A pressure conduit structure using the pressure regulating chamber structure of any one of claims 1 to 4, wherein: It has a horizontal tunnel (1) and a vertical shaft (2), which are connected by a bend (3). Each connecting branch pipe (6) of the main connecting pipe (5) is connected to the horizontal section of the bend (3).

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