Ecological flow adjusting device of pumped storage power station

Abstract

The utility model discloses an ecological flow adjusting device of a pumped storage power station. The ecological flow adjusting device comprises a conveying pipeline and an anti-blocking mechanism. The anti-blocking mechanism comprises a mounting seat, a branch pipe, a filter screen, a water suction pump, a water suction pipe, a water drainage pipe, a differential pressure sensor and an electromagnetic valve; the mounting seat is fixedly connected in the conveying pipeline, the filter screen is detachably connected with the mounting seat, and the conveying pipeline is divided into a section close to the upstream and a section close to the downstream by the filter screen; the branch pipe is communicated with the downstream section of the conveying pipeline; the water suction pump is fixed to the outer wall face of the conveying pipeline, and a water inlet and a water outlet of the water suction pump are connected with one end of a water suction pipe and one end of a water drainage pipe respectively; the other end of the water pumping pipe is communicated with the upstream section of the conveying pipeline; the other end of the water draining pipe is communicated with the downstream section of the conveying pipeline; the electromagnetic valves are installed on the branch pipe, the water pumping pipe and the water drainage pipe respectively. Sediment is flushed out of the branch pipe through the anti-blocking mechanism, cleaning of the filter screen is completed, and the situation that water flow conveying is affected due to sediment blocking is avoided.

Description

Technical Field

[0001] This utility model relates to the field of pumped storage power stations, specifically to an ecological flow regulation device for pumped storage power stations. Background Technology

[0002] Pumped-storage hydroelectric power stations utilize electricity generated during periods of low electricity load to pump water into an upper reservoir, and then release the water into a lower reservoir to generate electricity during periods of high electricity load. Also known as pumped-storage hydroelectric power stations, they can convert excess electricity generated during periods of low grid load into high-value electricity generated during periods of high grid load. They are also suitable for frequency and phase regulation, stabilizing the frequency and voltage of the power system, and serve as emergency backups. Furthermore, they can improve the efficiency of thermal and nuclear power plants within the system. The ecological flow regulation device in a pumped-storage power station is a technical device used to ensure the water demand of the downstream river ecosystem. Its main purpose is to maintain a minimum ecological flow in the downstream river channel during power station operation (especially during pumping or power generation), preventing ecosystem damage caused by drastic water level fluctuations or flow interruptions.

[0003] However, in the long-term use of existing ecological flow regulation devices, silt can easily clog valves or pipes, thus affecting the flow delivery. Utility Model Content

[0004] The purpose of this invention is to provide an ecological flow regulation device for pumped storage power stations to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] An ecological flow regulation device for a pumped storage power station includes a delivery pipeline and an anti-clogging mechanism;

[0007] The anti-clogging mechanism includes a mounting base, a branch pipe, a filter screen, a water pump, a water pumping pipe, a drain pipe, a differential pressure sensor, and a solenoid valve.

[0008] The mounting base, filter screen, and differential pressure sensor are located inside the conveying pipeline. The mounting base is fixed to the inner wall of the conveying pipeline, and the filter screen is detachably connected to the mounting base. The filter screen divides the conveying pipeline into a section near the upstream end and a section near the downstream end. The branch pipe connects to the downstream section of the conveying pipeline. The differential pressure sensor is located near the filter screen to sense the pressure difference across the filter screen. The water pump is fixed to the outer wall of the conveying pipeline. The inlet of the water pump is connected to one end of the pumping pipe, and the outlet of the water pump is connected to the drain pipe. The other end of the pumping pipe connects to the upstream section of the conveying pipeline, and the other end of the drain pipe connects to the downstream section of the conveying pipeline. Multiple solenoid valves are installed on the branch pipe, pumping pipe, and drain pipe, respectively.

[0009] Furthermore, the filter screen is tilted, and two differential pressure sensors are provided, which are respectively arranged on the upstream side and the downstream side of the filter screen.

[0010] Furthermore, the anti-blocking mechanism also includes a protective shell fixed to the outside of the delivery pipeline, and the water pump is located inside the protective shell.

[0011] Furthermore, one end of the conveying pipeline is connected to the upper reservoir, and the other end is connected to the lower reservoir;

[0012] The ecological flow regulation device also includes a regulation mechanism, which includes an electric regulating valve installed in a section of the conveying pipeline near the downstream end, and a water level sensor installed in the lower reservoir.

[0013] Furthermore, a protective shell is installed on the outside of the water level sensor, and the protective shell is screwed to one end of the conveying pipe.

[0014] Furthermore, the filter screen is threadedly connected to the mounting base.

[0015] Furthermore, the drain pipe is positioned close to the filter screen where it connects to the conveying pipe, and the end of the drain pipe that connects to the conveying pipe is inclined.

[0016] Furthermore, the branch pipe is positioned close to the filter screen where it connects to the conveying pipe, and the end of the branch pipe that connects to the conveying pipe is also inclined.

[0017] Furthermore, the drainage pipe, filter screen, and branch pipe all have the same inclination angle.

[0018] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0019] Firstly, this utility model detachably connects the filter screen to the mounting base, allowing the filter screen to be installed inside the conveying pipe. This detachable connection facilitates subsequent removal and replacement of the filter screen. When water enters the conveying pipe, the filter screen filters and blocks sediment in the water flow. When excessive sediment accumulates at the filter screen, a differential pressure sensor detects the pressure difference across the filter screen. At this point, the pressure difference at the inlet end is greater than that at the outlet end, thus activating the water pump inside the protective housing and opening the solenoid valves on the branch pipe, the pumping pipe, and the drain pipe, ensuring unobstructed flow. The protective housing protects the pump from sediment, allowing the pumping pipe to draw clean water from the right side of the filter screen. This water is then pumped to the left side of the filter screen through the drain pipe and sprayed out to rinse the filter screen, flushing out sediment from the branch pipe and cleaning the filter screen. Once the pressure difference on both sides is equal, the pump and solenoid valves close, thus preventing sediment blockage from affecting water flow.

[0020] Secondly, this utility model connects the two ends of the conveying pipeline to the lower reservoir and the upper reservoir respectively, and uses a water level sensor to detect the water level in the lower reservoir, monitor water level changes, and transmit the data to an external controller. When the power station pumps water and causes the water level in the lower reservoir to drop, the controller increases the opening of the electric regulating valve to guide the water flow from the upper reservoir to replenish the lower reservoir. When the power generation releases water and causes the water level in the lower reservoir to rise, the controller decreases the opening of the electric regulating valve to avoid downstream flow overload, thereby achieving the effect of regulating the flow. Attached Figure Description

[0021] Figure 1 This is a perspective view of the entire utility model;

[0022] Figure 2 This is a perspective view of the filter screen of this utility model;

[0023] Figure 3 This is a cross-sectional view of the present invention;

[0024] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0025] The components include: 1. Conveying pipeline; 2. Anti-blocking mechanism; 3. Adjusting mechanism; 21. Mounting base; 22. Branch pipe; 23. Filter screen; 24. Protective shell; 25. Water pump; 26. Pumping pipe; 27. Drainage pipe; 28. Differential pressure sensor; 29. ​​Solenoid valve; 31. Lower reservoir; 32. Upper reservoir; 33. Electric regulating valve; 34. Water level sensor. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1

[0028] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 An ecological flow regulation device for a pumped storage power station includes a conveying pipeline 1 and an anti-blocking mechanism 2.

[0029] The anti-clogging mechanism 2 includes a mounting base 21, a branch pipe 22, a filter screen 23, a protective shell 24, a water pump 25, a pumping pipe 26, a drain pipe 27, a differential pressure sensor 28, and a solenoid valve 29. The mounting base 21 is fixedly connected inside the delivery pipe 1, and the filter screen 23 is threadedly connected to one end of the mounting base 21. Figure 1 As shown, filter screen 23 is inclined, and branch pipe 22 is located on the left side of filter screen 23. Branch pipe 22 is connected to conveying pipe 1 and is also inclined like filter screen 23. Protective shell 24 is located on the outer wall of conveying pipe 1. Water pump 25 is installed inside protective shell 24. The right end of water pump 25 is the inlet, where one end of water pump pipe 26 is installed; the left end of water pump 25 is the outlet, where one end of drain pipe 27 is installed; the other end of water pump pipe 26 is connected to conveying pipe 1, and the connection point is located on the right side of filter screen 23; the other end of drain pipe 27 is connected to conveying pipe 1, and the connection point is located on the left side of filter screen 23. Figure 4 As shown, the end of the drain pipe 27 connected to the conveying pipe 1 is inclined, and the drain pipe 27, filter screen 23, and branch pipe 22 have the same inclination angle to facilitate the discharge of flushed mud and sand. There are two differential pressure sensors 28, which are installed inside the conveying pipe 1 and located on the left and right sides of the filter screen 23, respectively. There are multiple solenoid valves 29, which are installed on the outside of the branch pipe 22, the pumping pipe 26, and the drain pipe 27, respectively.

[0030] Through the above technical solution, the filter screen 23 is installed inside the conveying pipe 1 by threading the filter screen 23 to the mounting base 21. The threaded connection facilitates the subsequent disassembly and replacement of the filter screen 23. When water flows into the conveying pipe 1, the filter screen 23 filters and blocks the mud and sand in the water flow. When too much mud and sand accumulates at the filter screen 23, the differential pressure sensor 28 set at both ends of the filter screen 23 detects the differential pressure at both ends of the filter screen 23. At this time, the differential pressure at the inlet end will be greater than the differential pressure at the outlet end, so the controller starts the water pump 25 inside the protective shell 24 and opens the solenoid valve 29 outside the branch pipe 22, the pumping pipe 26 and the drain pipe 27, so that the pipeline is unblocked. The protective shell 24 protects the water pump 25 from the influence of mud and sand, allowing the water pumping pipe 26 to draw clean water from the right side of the filter screen 23. Then, the water is pumped to the left side of the filter screen 23 through the drain pipe 27 and sprayed out to rinse the filter screen 23, and the mud and sand are flushed out from the branch pipe 22, thus cleaning the filter screen 23. When the pressure difference on both sides is consistent, the water pump 25 and the solenoid valve 29 are closed, thereby achieving the effect of preventing mud and sand from clogging and affecting the water flow.

[0031] Example 2

[0032] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4Furthermore, based on Embodiment 1, an adjustment mechanism 3 is added. The two ends of the conveying pipeline 1 are connected to the lower reservoir 31 and the upper reservoir 32, respectively. The adjustment mechanism 3 includes an electric regulating valve 33 installed at the end of the conveying pipeline 1 near the lower reservoir 31, and a water level sensor 34 installed on the conveying pipeline 1 and located in the lower reservoir 31.

[0033] The water level sensor 34 is equipped with a protective shell, and one end of the protective shell is screwed to one end of the conveying pipe 1.

[0034] Through the above technical solution, by connecting the two ends of the conveying pipeline 1 to the lower reservoir 31 and the upper reservoir 32 respectively, and by using the water level sensor 34 to detect the water level in the lower reservoir 31, the water level changes are monitored and transmitted to an external controller. When the power station pumps water, causing the water level in the lower reservoir 31 to drop, the controller increases the opening of the electric regulating valve 33 to guide the water flow from the upper reservoir 32 to replenish the lower reservoir 31. When the power generation causes the water level in the lower reservoir 31 to rise, the controller decreases the opening of the electric regulating valve 33 to avoid downstream flow overload, thereby achieving the effect of regulating the flow. The water level sensor 34 and the controller are both existing technologies, and their working principles are well known to those skilled in the art, so they will not be described in detail.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made to these embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ecological flow regulation device for a pumped storage power station, characterized in that, It includes a delivery pipeline (1) and an anti-blocking mechanism (2); The anti-blocking mechanism (2) includes a mounting base (21), a branch pipe (22), a filter screen (23), a water pump (25), a water pumping pipe (26), a drain pipe (27), a differential pressure sensor (28), and a solenoid valve (29). The mounting base (21), filter screen (23), and differential pressure sensor (28) are located inside the conveying pipe (1). The mounting base (21) is fixed to the inner wall of the conveying pipe (1). The filter screen (23) is detachably connected to the mounting base (21). The filter screen (23) divides the conveying pipe (1) into a section near the upstream and a section near the downstream. The branch pipe (22) connects to the downstream section of the conveying pipe (1). The differential pressure sensor (28) is located near the filter screen (23) and is used to sense the pressure difference on both sides of the filter screen (23). Differential pressure; the water pump (25) is fixed on the outer wall of the conveying pipe (1), the inlet of the water pump (25) is connected to one end of the water pump pipe (26), the outlet of the water pump (25) is connected to the drain pipe (27), the other end of the water pump pipe (26) is connected to the upstream section of the conveying pipe (1), and the other end of the drain pipe (27) is connected to the downstream section of the conveying pipe (1); there are multiple solenoid valves (29), which are respectively installed on the branch pipe (22), the water pump pipe (26) and the drain pipe (27).

2. The ecological flow regulation device for a pumped storage power station according to claim 1, characterized in that, The filter screen (23) is set to be inclined, and there are two differential pressure sensors (28), which are respectively arranged on the upstream side and the downstream side of the filter screen (23).

3. The ecological flow regulation device for a pumped storage power station according to claim 1, characterized in that, The anti-blocking mechanism (2) also includes a protective shell (24) fixed to the outside of the conveying pipe (1), and the water pump (25) is located inside the protective shell (24).

4. The ecological flow regulation device for a pumped storage power station according to claim 1, characterized in that, One end of the conveying pipeline (1) is connected to the upper reservoir (32), and the other end is connected to the lower reservoir (31); The ecological flow regulation device also includes a regulation mechanism (3), which includes an electric regulating valve (33) installed in a section of the conveying pipeline (1) near the downstream end, and a water level sensor (34) installed in the lower reservoir (31).

5. The ecological flow regulation device for a pumped storage power station according to claim 4, characterized in that, The water level sensor (34) is equipped with a protective shell, which is screwed to one end of the conveying pipe (1).

6. The ecological flow regulation device for a pumped storage power station according to claim 1, characterized in that, The filter screen (23) is threadedly connected to the mounting base (21).

7. The ecological flow regulation device for a pumped storage power station according to claim 1, characterized in that, The drain pipe (27) is located close to the filter screen (23) and the end of the drain pipe (27) connected to the conveying pipe (1) is inclined.

8. The ecological flow regulation device for a pumped storage power station according to claim 7, characterized in that, The branch pipe (22) is located close to the filter screen (23) and the end of the branch pipe (22) connected to the conveying pipe (1) is also inclined.

9. The ecological flow regulation device for a pumped storage power station according to claim 7, characterized in that, The drainage pipe (27), filter screen (23), and branch pipe (22) have the same inclination angle.

10. The ecological flow regulation device for a pumped storage power station according to claim 1, characterized in that, It also includes a controller, which is connected to the water pump (25), the differential pressure sensor (28) and the solenoid valve (29). The controller controls the opening and closing of the water pump (25) and the solenoid valve (29) based on the pressure difference across the filter screen (23) fed back by the differential pressure sensor (28).

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