Automatic pump flow regulating device for hydroelectric power plant

Abstract

The utility model relates to automatic pump flow regulation technical field especially a kind of water power plant automatic pump flow regulating device, including centrifugal pump and pump body power source, the left side input shaft of centrifugal pump is fixedly connected with the output shaft of pump body power source, the upper end of centrifugal pump is installed with float ball valve, the front side of centrifugal pump is installed with electronic flow regulating valve, the front side of electronic flow regulating valve is installed with connecting assembly. Through the cooperation between collar, bellows, elbow and electronic flow regulating valve, when using, the water flow discharged by electronic flow regulating valve enters round pipe, then makes water flow flow to the inside of collar through round hole, and is transported to elbow by bellows to be transported to external pipeline, effectively avoid the problem that existing automatic pump is prone to error between electronic flow regulating valve drain port and external pipeline connection position when installing, so that the position of overall water pump needs to be moved to meet connection, so that connection process is very inconvenient.

Description

Technical Field

[0001] This utility model relates to the field of automatic pump flow regulation technology, specifically an automatic pump flow regulation device for hydropower plants. Background Technology

[0002] A hydroelectric power station is an industrial enterprise that generates electricity by utilizing the kinetic energy of the powerful water flow generated by the water level difference. It uses the water energy of a river to drive a turbine, which in turn drives a generator set to produce electricity. Advantages include no fuel required, low cost, no environmental pollution, simple manufacturing of electromechanical equipment, and flexible operation. Hydroelectric power plants require automatic pump flow regulation devices when adjusting the overall flow rate. For example, application number "202221454463.1" describes an automatic pump flow regulation device for hydroelectric power plants, which includes an automatic pump flow head and an automatic pump flow regulation body.

[0003] However, although it can achieve the technical effect of avoiding fixed shaking, existing automatic pumps are prone to problems during installation. For example, the connection position between the drain port of the electronic flow regulating valve and the external pipeline may be incorrect, which requires moving the entire water pump to meet the connection requirements, making the connection process very inconvenient. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that during the installation of the automatic pump, errors in the connection position between the drain outlet of the electronic flow regulating valve and the external pipeline are common, requiring the entire pump to be moved to meet the connection requirements, which makes the connection process very inconvenient. Therefore, this utility model proposes an automatic pump flow regulating device for hydropower plants.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] Design an automatic pump flow regulation device for a hydroelectric power plant, including a centrifugal pump and a pump power source. The left input shaft of the centrifugal pump is fixedly connected to the output shaft of the pump power source. A float valve is installed at the upper end of the centrifugal pump, and an electronic flow regulating valve is installed at the front of the centrifugal pump. A connecting component is installed at the front of the electronic flow regulating valve.

[0007] Preferably, the connecting assembly includes a circular pipe, the rear end of which is connected to an electronic flow control valve via a flange. The outer wall of the circular pipe is machined with multiple circular holes, and a collar is provided on the outer side of each circular hole. The outer wall of the circular pipe is connected to an elbow via a corrugated pipe.

[0008] Preferably, the front end faces of the elbows on both sides are flush, and the inner walls of the front and rear sides of the collar are rotatably connected to the round tube through sealed bearings.

[0009] Preferably, a high-pressure air chamber is installed at the upper end of the pump body power source, and an air inlet pipe is connected to the rear end of the high-pressure air chamber.

[0010] Preferably, the right side of the high-pressure air chamber is connected to a float valve via a gas pipe.

[0011] The present invention provides an automatic pump flow regulation device for a hydropower plant, which has the following advantages:

[0012] By coordinating the collar, bellows, elbow, and electronic flow control valve, the user can rotate the collar and utilize the expandable and contractible nature of the bellows to adjust the elbow's position horizontally and vertically within the corresponding plane. This compensates for positional misalignment caused by installation errors. After adjustment, the position is fixed using a flange. The other side is connected using the same method. In use, water discharged from the electronic flow control valve enters the circular pipe, then flows through the circular hole into the collar, and is then transported through the bellows to the elbow for delivery to the external pipeline. This effectively avoids the problem of existing automatic pumps where errors in the connection position between the electronic flow control valve's drain outlet and the external pipeline necessitate repositioning the entire pump to achieve the desired connection, making the connection process inconvenient. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the front appearance structure of this utility model;

[0014] Figure 2 This is a bottom view of the structure of this utility model;

[0015] Figure 3 This utility model Figure 1 A schematic diagram of a partial cross-sectional structure in the diagram;

[0016] Figure 4 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 5 This is a schematic diagram of the left-side structure of this utility model.

[0018] In the diagram: 1. Centrifugal pump, 2. Float valve, 3. Connecting assembly, 301. Round pipe, 302. Collar, 303. Bellows, 304. Elbow, 305. Round hole, 4. Pump body power source, 5. Electronic flow control valve, 6. Gas pipeline, 7. High-pressure gas chamber. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] See attached document Figure 1-5In this embodiment, an automatic pump flow regulation device for a hydroelectric power plant includes a centrifugal pump 1 and a pump power source 4. The left input shaft of the centrifugal pump 1 is fixedly connected to the output shaft of the pump power source 4. The pump power source 4 drives the rotating part of the centrifugal pump 1 to rotate by a motor structure with large and small pulleys to adjust the transmission ratio. A float valve 2 is installed at the upper end of the centrifugal pump 1. The model of the float valve 2 can be determined according to the specific application. The model of the centrifugal pump 1 can be determined according to the specific application. An electronic flow regulating valve 5 is installed at the front of the centrifugal pump 1. The model of the electronic flow regulating valve 5 can be determined according to the specific application. A connecting component 3 is installed at the front of the electronic flow regulating valve 5. A high-pressure air chamber 7 is installed at the upper end of the pump power source 4. An air inlet pipe is connected to the rear end of the high-pressure air chamber 7. A one-way valve for the air inlet direction is installed inside the high-pressure air chamber 7 to prevent the high-pressure gas inside from being discharged from the rear air inlet pipe. The right side of the high-pressure air chamber 7 is connected to the float valve 2 through a gas pipe 6.

[0021] The centrifugal pump 1, high-pressure air chamber 7, float valve 2, and pump power source 4 constitute an automatic pump. The float mechanical automatic pump involved in this case injects liquid into the centrifugal pump 1 by gravity, causing the float inside the float valve 2 to rise to the upper limit position, triggering the air supply valve to open. The high-pressure gas (compressed air) in the high-pressure air chamber 7 pressurizes and discharges the liquid. When the float falls to the lower limit position, the air supply valve is closed and the air is exhausted, realizing the cycle operation. The centrifugal pump 1 drives the impeller through the pump power source 4 to generate centrifugal force to deliver liquid to the electronic flow regulating valve 5.

[0022] See attached document Figure 1-5 In this embodiment, the connecting component 3 includes a circular tube 301. The rear end of the circular tube 301 is connected to the electronic flow regulating valve 5 through a flange. The outer wall of the circular tube 301 is machined with multiple circular holes 305. A collar 302 is provided on the outer side of each circular hole 305. The outer wall of the circular tube 301 is connected to the elbow 304 through a corrugated pipe 303. The corrugated pipe 303 can be made of stainless steel. The front end faces of the elbows 304 on both sides are flush. The inner walls of the front and rear sides of the collar 302 are rotatably connected to the circular tube 301 through sealed bearings. The collar 302 can rotate on the outer wall of the circular tube 301 and ensure relative sealing.

[0023] Working principle:

[0024] When the automatic pump flow regulation device of this hydropower plant is needed, the right side of the centrifugal pump 1 is connected to the corresponding hydraulic pipeline of the hydropower plant via a flange. In specific use, the automatic pump consists of centrifugal pump 1, high-pressure air chamber 7, float valve 2, and pump power source 4. The float mechanical automatic pump involved in this case injects liquid into the centrifugal pump 1 by gravity, causing the float inside the float valve 2 to rise to the upper limit position, triggering the air supply valve to open. The high-pressure gas (compressed air) in the high-pressure air chamber 7 pressurizes and discharges the liquid. When the float falls to the lower limit position, the air supply valve is closed and the air is exhausted, realizing the cycle operation. The centrifugal pump 1 drives the impeller through the pump power source 4 to generate centrifugal force to deliver liquid to the electronic flow regulation valve 5, realizing the automatic pump hydraulic transportation process of the hydropower plant (this process is existing technology). Then, after the output flow is controlled by the electronic flow regulation valve 5, it is discharged to the external pipeline. The electronic flow regulation valve 5 can be connected to an external PLC controller via a signal line to control the specific flow value.

[0025] In existing technologies, most require an electronic flow control valve 5 to distribute the controlled water flow to two or more external pipes for operation at a work station. However, during installation, existing automatic pumps are prone to errors in the connection position between the drain outlet of the electronic flow control valve 5 and the external pipes, requiring the entire pump to be moved to make the connection process inconvenient. Therefore, this design incorporates a connection component 3. Taking two external pipes as an example, the user can rotate the collar 302 and, with the expansion and contraction characteristics of the corrugated pipe 303, allow the elbow 304 to move laterally and vertically within the corresponding plane. The vertical position is adjusted to compensate for the positional offset caused by installation errors. After the position is adjusted, the position is fixed by the flange. The other side is also connected by the above operation. When in use, the water discharged by the electronic flow regulating valve 5 enters the circular pipe 301, and then flows through the circular hole 305 to the inside of the collar 302. It is then transported through the bellows 303 to the elbow 304 and then to the external pipeline. This effectively avoids the problem that when installing existing automatic pumps, the connection position of the electronic flow regulating valve 5 drain port and the external pipeline may be incorrect, which requires moving the entire water pump to meet the connection, making the connection process very inconvenient.

[0026] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. An automatic pump flow regulating device for a hydroelectric power plant, comprising a centrifugal pump (1) and a pump power source (4), wherein the left input shaft of the centrifugal pump (1) is fixedly connected to the output shaft of the pump power source (4), characterized in that: A float valve (2) is installed at the upper end of the centrifugal pump (1), an electronic flow regulating valve (5) is installed at the front side of the centrifugal pump (1), and a connecting assembly (3) is installed at the front side of the electronic flow regulating valve (5).

2. The automatic pump flow regulating device for hydroelectric power plants according to claim 1, characterized in that: The connecting assembly (3) includes a round pipe (301), the rear end of which is connected to an electronic flow regulating valve (5) via a flange. The outer wall of the round pipe (301) is machined with multiple round holes (305), and a collar (302) is provided on the outer side of each round hole (305). The outer wall of the round pipe (301) is connected to an elbow (304) via a corrugated pipe (303).

3. The automatic pump flow regulating device for hydroelectric power plants according to claim 2, characterized in that: The front end faces of the elbows (304) on both sides are flush, and the inner walls of the front and rear sides of the collar (302) are rotatably connected to the round tube (301) through sealed bearings.

4. The automatic pump flow regulating device for hydroelectric power plants according to claim 1, characterized in that: The upper end of the pump power source (4) is equipped with a high-pressure air chamber (7), and the rear end of the high-pressure air chamber (7) is connected to an air inlet pipe.

5. The automatic pump flow regulating device for hydroelectric power plants according to claim 4, characterized in that: The right side of the high-pressure air chamber (7) is connected to the float valve (2) via a gas pipe (6).

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