Guide vane water leakage measuring system suitable for pumped storage power station

Abstract

The utility model discloses a guide vane water leakage measuring system suitable for a pumped storage power station, which comprises a pump turbine unit, a unit water inlet pipe, a unit water inlet valve, a guide vane water leakage measuring device and a volute, the pump turbine unit is arranged in the unit water inlet pipe, the unit water inlet valve is arranged at the front end of the unit water inlet pipe, and the guide vane water leakage measuring device is arranged in the volute. The volute is arranged below the pump turbine unit, and the guide vane water leakage measuring device comprises a pressure steel pipe drainage pipe, a guide vane water leakage measuring pipe and a volute drainage pipe. The system can measure the water leakage amount of the guide vane of the pumped storage unit, and is not directly connected with the unit. The guide vane water leakage measuring system solves the problem of measuring the water leakage of the guide vane of a pumping and storage unit without a water inlet valve bypass pipe, directly utilizes the original pressure steel pipe drainage pipe and the volute drainage pipe of the unit, avoids adding a welding interface for connecting a pipeline with the unit, and reduces potential safety hazards.

Description

Technical Field

[0001] The utility model relates to a guide vane water leakage measurement system, in particular to a guide vane water leakage measurement system suitable for a pumped storage power station. Background Art

[0002] With the national carbon 30,60 target, new energy power generation methods such as wind power and solar power have been vigorously developed. Along with the development of these new energy power generation methods, pumped storage has also been vigorously developed due to its unique energy storage function.

[0003] In order to ensure the operational reliability of the unit, the guide vane leakage needs to be measured at the initial stage of the pumped storage unit operation. The traditional measurement system generally uses the ball valve bypass pipe for measurement, but with the development of technology, some power stations have cancelled the bypass pipe, so it is necessary to find a universal guide vane leakage measurement system.

[0004] Therefore, a guide vane leakage measurement system suitable for pumped storage power stations is designed. Measuring the guide vane leakage can not only detect the performance of the unit and ensure the performance of the unit, but also avoid adding holes to the pressure steel pipe and volute of the unit, which increases the risk of flooding the plant. Utility Model Content

[0005] In order to solve the problems existing in the background technology, the utility model provides a guide vane leakage measurement system suitable for a pumped storage power station.

[0006] The utility model adopts the following technical solutions:

[0007] A guide vane water leakage measurement system suitable for a pumped storage power station comprises a water pump turbine unit, a unit water inlet pipe, a unit water inlet valve, a guide vane water leakage measurement device and a volute, wherein the water pump turbine unit is arranged in the unit water inlet pipe, the front end of the unit water inlet pipe is provided with a unit water inlet valve, the volute is arranged on the unit water inlet valve, and the guide vane water leakage measurement device comprises a pressure steel pipe drainage pipe, a guide vane water leakage measurement pipe and a nest shell drainage pipe;

[0008] One end of the pressure steel pipe drainage pipe is connected to the unit water inlet pipe before the unit water inlet valve, and is connected to the pressure steel pipe drainage valve and the pressure steel pipe drainage pipe three-way cock valve in sequence, and the other end is connected to the pressure steel pipe drainage needle valve;

[0009] One end of the volute drainage pipe is connected to the unit water inlet pipe after the unit water inlet valve, and is connected in sequence to the volute drainage valve, the volute drainage three-way plug valve, and the volute drainage inspection valve, and the other end is connected to the tailwater pipe;

[0010] The guide vane leakage measurement tube is provided with an electromagnetic flowmeter, one end of which is connected to the three-way stopcock of the drainage pipe, and the other end is connected to the three-way stopcock of the volute drainage. The flow measurement range of the electromagnetic flowmeter is (0~1000m 3 / h);

[0011] The pressure steel pipe drainage needle valve is connected to the volute drainage inspection valve and the tailwater pipe.

[0012] Furthermore, the connection point between the volute drainage pipe and the volute is arranged at the tailwater pipe elbow section of the volute, which effectively collects the accumulated liquid at the turning point of the volute.

[0013] Furthermore, a maintenance ball valve is provided between the drain needle valve and the volute drain pipe.

[0014] Beneficial effects of the utility model:

[0015] This system can measure the water leakage of the guide vane of the pumped storage unit, which is not directly connected to the unit. The guide vane water leakage measurement system solves the problem of measuring the water leakage of the guide vane of the pumped storage unit without the bypass pipe of the water inlet valve. At the same time, the system directly uses the original pressure steel pipe drainage pipe and volute drainage pipe of the unit, avoiding the increase of welding interfaces when the pipeline is connected to the unit, reducing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] Attached Figure 1 This is a system layout diagram of an embodiment of the utility model.

[0018] The names of the components in the figure are: 1-steel pipe drain pipe, 2-pressure steel pipe drain valve, 3-pressure steel pipe drain pipe three-way plug valve, 4-pressure steel pipe drain needle valve, 5-guide vane leakage measuring tube, 6-electromagnetic flowmeter (ultrasonic flowmeter), 7-volute drain pipe, 8-volute drain valve, 9-volute drain three-way plug valve, 10-volute drainage inspection valve, 11-inspection ball valve, 12-tailwater pipe. DETAILED DESCRIPTION

[0019] In conjunction with the instruction manual Figure 1 The specific implementation is as follows:

[0020] The guide vane leakage measurement system for a pumped storage power station in this embodiment comprises a pressure steel pipe drainage pipe (1), a pressure steel pipe drainage valve (2), a pressure steel pipe drainage pipe three-way plug valve (3), a pressure steel pipe drainage needle valve (4), a guide vane leakage measurement pipe (5), an electromagnetic flowmeter (ultrasonic flowmeter) (6), a volute drainage pipe (7), a volute drainage valve (8), a volute drainage three-way plug valve (9), and a volute drainage inspection valve (10).

[0021] The penstock drain pipe (1) is composed of a penstock drain valve (2) and a penstock drain needle valve (4).

[0022] The volute drain pipe (7) is composed of a volute drain valve (8) and a volute drain inspection valve (10).

[0023] The guide vane water leakage measuring tube (5) is connected to the pressure steel pipe drainage pipe (1) and the volute drainage pipe (7) through a three-way plug valve (3) (9), and an electromagnetic flowmeter (or ultrasonic flowmeter) (6) is arranged on the guide vane water leakage measuring tube (5).

[0024] The guide vane water leakage measuring tube (5) is connected to the pressure steel pipe drainage tube (1) and the volute drainage tube (7) through a three-way plug valve (3) (9), and an electromagnetic flowmeter (ultrasonic flowmeter) (6) is arranged on the guide vane water leakage measuring tube (5).

[0025] The three-way plug valve (3) (9) is arranged after the pressure pipe drain valve (2) and after the volute drain valve (8).

[0026] When the unit is full of water, first close the unit water inlet ball valve and movable guide vane, then close the pressure steel pipe drainage needle valve 4 and the volute drainage inspection valve 10, open the pressure steel pipe drainage valve 2 and the volute drainage valve 8, open the pressure steel pipe drainage pipe three-way plug valve 3 and the volute drainage three-way plug valve 9, and then observe the electromagnetic flowmeter (ultrasonic flowmeter) (6), which is the guide vane leakage.

[0027] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A guide vane leakage measurement system suitable for a pumped storage power station, comprising a water pump turbine unit, a unit water inlet pipe, a unit water inlet valve, a guide vane leakage measurement device and a volute, wherein the water pump turbine unit is arranged in the unit water inlet pipe, the front end of the unit water inlet pipe is provided with a unit water inlet valve, the volute is arranged behind the unit water inlet valve, and the guide vane leakage measurement device comprises a pressure steel pipe drainage pipe, a guide vane leakage measurement pipe and a volute drainage pipe; One end of the pressure steel pipe drainage pipe is connected to the unit water inlet pipe before the unit water inlet valve, and is connected to the pressure steel pipe drainage valve and the pressure steel pipe drainage pipe three-way cock valve in sequence, and the other end is connected to the pressure steel pipe drainage needle valve; One end of the volute drainage pipe is connected to the volute water inlet pipe after the unit water inlet valve, and is connected to the volute drainage valve, the volute drainage three-way plug valve, and the volute drainage inspection valve in sequence, and the other end is connected to the tailwater pipe; The guide vane water leakage measurement tube is provided with an electromagnetic flowmeter, one end of which is connected to the drainage pipe three-way stopcock, and the other end is connected to the volute drainage three-way stopcock; The pressure steel pipe drainage needle valve is connected to the volute drainage inspection valve and the tailwater pipe.

2. A guide vane leakage measurement system suitable for a pumped storage power station according to claim 1, characterized in that: The connection point between the volute drainage pipe and the tailwater pipe is arranged at the tailwater pipe elbow section.

3. A guide vane leakage measurement system suitable for a pumped storage power station according to claim 1, characterized in that: A maintenance ball valve is installed between the pressure steel pipe drainage needle valve and the volute drainage pipe.

Images