Pressure regulating chamber structure and pressure pipeline structure

Abstract

The utility model relates to a kind of pressure regulating chamber structure and pressure pipeline structure.It is suitable for water and electricity pressure regulating chamber technical field.The utility model uses the technical scheme: a kind of pressure regulating chamber structure, with: pressure regulating chamber body, install on pressure pipeline, pressure regulating chamber body and pressure pipeline intercommunication;Floating plate, arrangement is in pressure regulating chamber body, floating body and pressure regulating chamber body side wall sliding fit, chamber is set in floating plate, chamber is equipped with the damping block that can move in the plane direction of floating plate.Such, after installing pressure regulating chamber body on pressure pipeline, when the water flow in pressure pipeline occurs sudden change, water level in pressure regulating chamber body changes, thereby relieving water flow impact in pressure pipeline, by setting floating plate in pressure regulating chamber body and setting movable damping block in floating plate, it is convenient when water level fluctuation occurs in pressure regulating chamber body, damping block in floating plate can lag sliding, relieve water level fluctuation in pressure regulating chamber body, make pressure regulating chamber body stable operation, thus with good stability.

Description

Technical Field

[0001] This utility model relates to a pressure regulating chamber structure and a pressure pipeline structure. It is applicable to the field of hydropower pressure regulating chamber 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. Utility Model Content

[0005] The technical problem to be solved by this utility model is: to solve the above-mentioned technical problem, this utility model provides a pressure regulating chamber structure and a pressure pipeline structure.

[0006] The technical solution adopted in this utility model is: a pressure regulating chamber structure, having:

[0007] The pressure regulating chamber is installed on the pressure pipeline and is connected to the pressure pipeline.

[0008] A floating plate is arranged inside the pressure regulating chamber. The floating body slides in conjunction with the side wall of the pressure regulating chamber. A cavity is provided inside the floating plate, and a damping block that can move in the plane direction of the floating plate is installed in the cavity.

[0009] The cross-section of the pressure regulating chamber is circular.

[0010] The longitudinal section of the floating plate is elliptical. The damping block consists of an upper slider that contacts the top surface of the chamber and a lower slider that contacts the bottom surface of the chamber. An arc-shaped groove is formed on the bottom surface of the upper slider that contacts the lower slider, and a protrusion that mates with the groove is formed on the top surface of the lower slider that contacts the upper slider.

[0011] A shock-absorbing pad is placed between the upper and lower sliders.

[0012] The floating plate is composed of an upper top plate and a lower top plate, and rubber pads are arranged on the upper and lower top plates at positions corresponding to the damping blocks.

[0013] The floating plate is composed of an upper top plate and a lower top plate joined together.

[0014] An impedance hole is provided at the bottom of the pressure regulating chamber to connect the pressure pipe to the pressure regulating chamber.

[0015] A current stabilizer is installed on the inner wall of the impedance orifice.

[0016] A convex cavity is provided at the middle position of the impedance hole.

[0017] A pressure pipeline structure, employing the pressure regulating chamber structure of the aforementioned pressure pipeline, includes a horizontal conveying tunnel and a vertical water conveying shaft, which are connected by a bend pipe. The pressure regulating chamber structure is installed on the bend pipe in a vertical direction.

[0018] The beneficial effects of this utility model are as follows: By setting a floating plate in the pressure regulating chamber, this utility model facilitates the flow of water into the pressure regulating chamber and the resulting fluctuations in water level when the water flow in the pressure pipeline changes. Under the action of the floating plate, the fluctuations in water level in the pressure regulating chamber can be effectively alleviated, thereby effectively improving the regulating quality of the pressure regulating chamber. This utility model also facilitates the installation of a chamber with an elliptical longitudinal section in the floating plate and the installation of a movable damping block in the chamber. This allows the damping block to sway backward in the chamber when the floating plate fluctuates with the water level, thereby achieving a good damping effect. Attached Figure Description

[0019] Figure 1 : A schematic diagram of the pressure pipeline structure in this utility model.

[0020] Figure 2 : Figure 1 Enlarged view of point A in the middle.

[0021] In the diagram: 1. Horizontal water conveyance tunnel; 2. Vertical water conveyance shaft; 3. Pressure regulating chamber; 4. Impedance hole; 5. Convex cavity; 6. Floating plate; 7. Flow stabilizer block; 8. Upper top plate; 9. Lower top plate; 10. Damping block; 11. Rubber pad; 12. Upper slider; 13. Lower slider; 14. Vibration damping pad. Detailed Implementation

[0022] 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.

[0023] Example 1 is a pressure regulating chamber structure, which includes: a pressure regulating chamber body 3, which is installed on a pressure pipeline and is connected to the pressure pipeline;

[0024] A float plate 6 is arranged inside the pressure regulating chamber 3. The float slides against the side wall of the pressure regulating chamber 3. A chamber is provided inside the float plate 6, and a damping block 10 that can move in the plane of the float plate 6 is installed in the chamber. Thus, when the pressure regulating chamber 3 is installed on the pressure pipeline, the water level in the pressure regulating chamber 3 changes when the water flow in the pressure pipeline changes suddenly, thereby mitigating the impact of the water flow in the pressure pipeline. By setting the float plate 6 inside the pressure regulating chamber 3 and installing the movable damping block 10 inside the float plate 6, the damping block 10 can slide backward within the float plate 6 when water level fluctuations occur in the pressure regulating chamber 3, mitigating the water level fluctuations in the pressure regulating chamber 3 and ensuring stable operation of the pressure regulating chamber 3, thus exhibiting good stability.

[0025] Example 2 is a pressure regulating chamber structure. Based on Example 1, in this example, the cross-section of the pressure regulating chamber body 3 is circular. Thus, the floating plate 6, which mates with the inner wall of the pressure regulating chamber body 3, can swing in all directions.

[0026] The floating plate 6 has an elliptical longitudinal section. The damping block 10 consists of an upper slider 12 that contacts the top surface of the chamber and a lower slider 13 that contacts the bottom surface of the chamber. The upper slider 12 has an arc-shaped groove on its bottom surface that contacts the lower slider 13, and the lower slider 13 has a protrusion on its top surface that mates with the groove. Thus, when the floating plate 6 swings, the damping block 10 moves under gravity. As the damping block 10 moves towards both ends of the floating plate 6, the groove of the upper slider 12 and the protrusion of the lower slider 13 cause relative rotation between them, maintaining their contact with the top and bottom surfaces of the chamber. When the water level in the pressure regulating chamber 3 is stable, the damping block 10 moves under gravity to the middle position of the floating plate 6, keeping the floating plate 6 horizontal.

[0027] A shock-absorbing pad 14 is arranged between the upper slider 12 and the lower slider 13. This effectively reduces wear between the upper slider 12 and the lower slider 13.

[0028] The floating plate 6 is composed of an upper top plate 8 and a lower top plate 9, which are connected by bolts. A rubber pad 11 is placed between the upper top plate 8 and the lower top plate 9. In this way, as the damping block 10 moves within the floating plate 6, the movement of the damping block 10 within the floating plate 6 has greater friction under the action of the rubber pad 11, thus achieving a better energy dissipation effect.

[0029] Example 3 is a pressure regulating chamber structure. Based on Example 1, in this example, an impedance hole 4 is provided at the bottom of the pressure regulating chamber body 3 to connect the pressure pipe and the pressure regulating chamber body 3.

[0030] A current stabilizer 7 is installed on the inner wall of the impedance hole 4.

[0031] A convex cavity 5 is provided at the middle position of the impedance hole 4. This reduces the amplitude of water level fluctuations within the pressure regulating chamber 3 and the height of the pressure regulating chamber; the fluctuations in the chamber water level attenuate quickly.

[0032] Example 4 is a pressure regulating chamber structure, which has:

[0033] Pressure regulating chamber 3 is installed on the pressure pipeline and is connected to the pressure pipeline.

[0034] The float plate 6 is arranged inside the pressure regulating chamber 3. The float body slides with the side wall of the pressure regulating chamber 3. A chamber is provided inside the float plate 6, and a damping block 10 that can move in the plane direction of the float plate 6 is installed in the chamber.

[0035] The cross-section of the pressure regulating chamber 3 is circular.

[0036] The longitudinal section of the floating plate 6 is elliptical. The damping block 10 is composed of an upper slider 12 that contacts the upper top surface of the chamber and a lower slider 13 that contacts the lower top surface of the chamber. An arc-shaped groove is formed on the bottom surface of the upper slider 12 that contacts the lower slider 13, and a protrusion that mates with the groove is formed on the top surface of the lower slider 13 that contacts the upper slider 12.

[0037] A shock-absorbing pad 14 is arranged between the upper slider 12 and the lower slider 13.

[0038] The floating plate 6 is composed of an upper top plate 8 and a lower top plate 9 joined together.

[0039] An impedance hole 4 is provided at the bottom of the pressure regulating chamber 3, which connects the pressure pipe to the pressure regulating chamber 3.

[0040] A current stabilizer 7 is installed on the inner wall of the impedance hole 4.

[0041] A convex cavity 5 is provided at the middle position of the impedance hole 4.

[0042] Example 5 is a pressure pipeline structure that uses the pressure regulating chamber structure of the pressure pipeline described above. It has a horizontal conveying tunnel 1 and a vertical water conveying shaft 2, which are connected by a bend. The pressure regulating chamber structure is installed on the bend in the vertical direction.

[0043] 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, characterized in that: have: The pressure regulating chamber (3) is installed on the pressure pipeline and is connected to the pressure pipeline; A floating plate (6) is arranged inside the pressure regulating chamber (3). The floating body slides with the side wall of the pressure regulating chamber (3). A chamber is provided inside the floating plate (6), and a damping block (10) that can move in the plane direction of the floating plate (6) is installed in the chamber.

2. The pressure regulating chamber structure according to claim 1, characterized in that: The cross-section of the pressure regulating chamber (3) is circular.

3. The pressure regulating chamber structure according to claim 2, characterized in that: The longitudinal section of the floating plate (6) is elliptical. The damping block (10) consists of an upper slider (12) that contacts the upper top surface of the chamber and a lower slider (13) that contacts the lower top surface of the chamber. An arc-shaped groove is formed on the bottom surface of the upper slider (12) that contacts the lower slider (13), and a protrusion that mates with the groove is formed on the top surface of the lower slider (13) that contacts the upper slider (12).

4. The pressure regulating chamber structure according to claim 3, characterized in that: A shock-absorbing pad (14) is arranged between the upper slider (12) and the lower slider (13).

5. The pressure regulating chamber structure according to claim 1, characterized in that: The floating plate (6) is composed of an upper top plate (8) and a lower top plate (9) spliced ​​together. Rubber pads (11) are arranged on the upper top plate (8) and the lower top plate (9) at positions corresponding to the damping blocks.

6. The pressure regulating chamber structure according to claim 1, characterized in that: An impedance hole (4) is provided at the bottom of the pressure regulating chamber (3) to connect the pressure pipe and the pressure regulating chamber (3).

7. A pressure regulating chamber structure according to claim 6, characterized in that: A current stabilizing block (7) is installed on the inner wall of the impedance hole (4).

8. A pressure regulating chamber structure according to claim 6, characterized in that: A convex cavity (5) is provided at the middle position of the impedance hole (4).

9. A pressure pipeline structure, employing the pressure regulating chamber structure of a pressure pipeline as described in any one of claims 1 to 8, characterized in that: It has a horizontal water conveying tunnel (1) and a vertical water conveying shaft (2), which are connected by a bend pipe. The pressure regulating chamber structure is installed on the bend pipe in the vertical direction.

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