Technical water supply throttling device and system based on relative flow and pressure difference control

Abstract

The utility model discloses a technical water supply throttling device and system based on relative flow and pressure difference control, which belongs to the field of hydropower station technical water supply system structures and comprises a signal collector, a valve opening controller, a plurality of temperature sensors, a plurality of pressure transmitters, a plurality of flowmeters and a plurality of electric ball valves with stepping motors. A pressure transmitter A is mounted at the downstream tail water port, and the data output end of the pressure transmitter A is connected with the data input end of the signal collector; the pressure value, collected by the pressure transmitter A, of the downstream tail water outlet corresponds to the height of the tail water outlet, and the opening degree of a cooler pipeline valve is triggered to influence the water flow pressure value, so that the pressure difference value of an inlet and an outlet is adjusted, it is guaranteed that water flow can smoothly discharge water to tail water under the condition that on-way loss and local loss can be overcome, and the service life of the water flow is prolonged. Therefore, redundant heat generated by the unit is taken away. According to the utility model, the optimal throttling effect can be achieved by reducing the total opening degree of the valve as much as possible.

Description

Technical Field

[0001] This utility model relates to the field of water supply system structure in hydropower stations, and more specifically, to a water supply throttling device and system based on relative flow and pressure difference control. Background Technology

[0002] The power plant's current technical water supply system primarily provides cooling water to the top-mounted cooler, generator air cooler, push-type cooler, and water-driven cooler. During the water supply process, the flow rate is regulated manually by adjusting the opening of ball valves. After manual adjustment, the valve state remains unchanged, and the flow rate into the cooler cannot be altered when the cooler temperature changes. This technical water supply system has the following problems: when the cooler temperature changes, the flow rate into the cooler cannot be changed, and to ensure sufficient cooling water for the cooler, it is often necessary to manually increase the valve opening, resulting in excess cooling water being wasted.

[0003] Furthermore, based on the above issues, the following technical problems were discovered: due to the influence of friction loss and local loss along the water flow, the water flow cannot be smoothly discharged to the tail end, resulting in the heat generated by the unit not being able to be smoothly carried away, affecting the control of valve opening, and to a certain extent restricting the achievement of the best throttling effect. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a technical water supply throttling device and system based on relative flow rate and pressure difference control. This device improves the structure of the technical water supply system, avoids the problem of wasting cooling water, and achieves the goal of minimizing the total valve opening to achieve the best throttling effect while ensuring that the internal temperature of the cooler remains constant.

[0005] The objective of this utility model is achieved through the following solution:

[0006] A water supply throttling device based on relative flow rate and pressure difference control includes:

[0007] Signal acquisition unit, valve opening controller, multiple temperature sensors, multiple pressure transmitters, multiple flow meters and multiple electric ball valves with stepper motors;

[0008] The signal acquisition device and the valve opening controller are both connected to the power plant control system. The control port of the signal acquisition device is connected to the first control port of the power plant control system, and the control port of the valve opening controller is connected to the second control port of the power plant controller.

[0009] A temperature sensor is installed at the upper guide bearing of the upper guide cooler in the technical water supply system. A pressure transmitter, a flow meter, and an electric ball valve with a stepper motor are installed on the pipeline from the upper guide cooler to the downstream tailwater. The data output terminals of the temperature sensor, pressure transmitter, flow meter, and electric ball valve with stepper motor are all connected to the data input terminal of the signal acquisition device. The first control output terminal of the valve opening controller is connected to the control input terminal of the electric ball valve with stepper motor.

[0010] A pressure transmitter A is installed at the downstream tailwater outlet. The data output terminal of pressure transmitter A is connected to the data input terminal of the signal acquisition unit. The pressure value of the downstream tailwater outlet collected by pressure transmitter A corresponds to the height of the tailwater outlet, triggering the opening of the cooler pipe valve to affect the water flow pressure value, so as to adjust the pressure difference between the inlet and outlet, ensuring that the water flow can overcome the friction loss and local loss and smoothly discharge the water to the tailwater, thereby removing the excess heat generated by the unit.

[0011] The fifth control output terminal of the valve opening controller is connected to the control input terminal of the electric ball valve five with a stepper motor installed in the downstream tailwater discharge pipeline; the sixth control output terminal of the valve opening controller is connected to the control input terminal of the electric ball valve six with a stepper motor installed in the water intake; the seventh control output terminal of the valve opening controller is connected to the control input terminal of the pressure reducing valve installed in the seepage collection well; an electromagnetic flow meter is connected to the pipeline of the electric ball valve five with a stepper motor, and the data output terminal of the electromagnetic flow meter is connected to the data input terminal of the signal acquisition device; a pressure transmitter five is connected to the pipeline of the pressure reducing valve in the seepage collection well, and the data output terminal of the pressure transmitter five is connected to the data input terminal of the signal acquisition device.

[0012] Furthermore, a temperature sensor is installed at the location of the generator air cooler, and a pressure transmitter, a flow meter, and an electric ball valve with a stepper motor are installed on the pipeline from the generator air cooler to the downstream tailwater. The data output terminals of the temperature sensor, pressure transmitter, flow meter, and electric ball valve with stepper motor are all connected to the data input terminal of the signal acquisition device. The second control output terminal of the valve opening controller is connected to the control input terminal of the electric ball valve with stepper motor.

[0013] Furthermore, a temperature sensor three is installed at the thrust bearing position of the push cooler, and a pressure transmitter three, a flow meter three, and an electric ball valve three with a stepper motor are installed on the pipeline from the push cooler to the downstream tailwater. The data output terminals of the temperature sensor three, pressure transmitter three, flow meter three, and electric ball valve three with a stepper motor are all connected to the data input terminal of the signal acquisition unit. The third control output terminal of the valve opening controller is connected to the control input terminal of the electric ball valve three with a stepper motor.

[0014] Furthermore, a temperature sensor four is installed at the water guide bearing position of the water-guided cooler, and a pressure transmitter four, a flow meter four, and an electric ball valve four with a stepper motor are installed on the pipeline from the water-guided cooler to the downstream tailwater. The data output terminals of the temperature sensor four, pressure transmitter four, flow meter four, and electric ball valve four with a stepper motor are all connected to the data input terminal of the signal acquisition device. The fourth control output terminal of the valve opening controller is connected to the control input terminal of the electric ball valve four with a stepper motor.

[0015] Furthermore, the power plant control system includes an AI control system.

[0016] A water supply throttling system based on relative flow rate and pressure difference control includes the water supply throttling device based on relative flow rate and pressure difference control as described in any of the preceding claims.

[0017] The beneficial effects of this utility model are:

[0018] This invention incorporates a temperature sensor, a corresponding signal collector, and a controller at the cooler location in the technical water supply system. Temperature sensor data is transmitted to the controller via the signal collector. The collected temperature values ​​correspond to the required relative flow rate of cooling water. Once the appropriate temperature condition is met, the opening of the corresponding electric ball valve is triggered, thereby reducing the valve opening to achieve a throttling effect while maintaining a constant internal temperature within the cooler. Furthermore, the pressure value at the downstream tailwater outlet determines the height of the tailwater outlet, allowing for adjustment of the pressure difference between the cooler's inlet and outlet. This ensures that the water flow overcomes frictional and localized losses, smoothly discharging water to the tailwater outlet and carrying away excess heat generated by the unit. With sufficient redundancy, the system's main outlet valve can be closed to the maximum extent possible to achieve optimal throttling. This device structure replaces manual valve adjustment, saving energy and increasing efficiency, thus ensuring stable operation of the unit. Attached Figure Description

[0019] The accompanying drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0021] All features disclosed in all embodiments of this specification, or all implicitly disclosed technical features, may be combined or substituted in any way, except for mutually exclusive technical features.

[0022] The technical solution of this utility model is further described in detail below with reference to the accompanying drawings, but the scope of protection of this utility model is not limited to what is described below. Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0023] 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.

[0024] Before describing the embodiments, it is necessary to explain some essential terms. For example:

[0025] If terms such as "first" and "second" are used to describe various elements in this application, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Therefore, the "first" element discussed below may also be referred to as the "second" element without departing from the teachings of this utility model. It should be understood that when an element is referred to as "connected" or "linked" to another element, it may be directly connected or directly linked to the other element, or there may be an intermediate element. Conversely, when an element is referred to as "directly connected" or "directly linked" to another element, there is no intermediate element.

[0026] The various terms appearing in this application are used for the purpose of describing particular embodiments only and are not intended to limit the present invention. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well.

[0027] When the terms “comprising” and / or “including” are used in this specification, these terms indicate the presence of the said feature, integral, step, operation, element and / or component, but do not exclude the presence and / or addition of more than one other feature, integral, step, operation, element, component and / or group thereof.

[0028] In one embodiment, such as Figure 1 As shown, a water supply throttling device based on relative flow rate and pressure difference control is characterized by comprising:

[0029] Signal acquisition unit, valve opening controller, multiple temperature sensors, multiple pressure transmitters, multiple flow meters and multiple electric ball valves with stepper motors;

[0030] The signal acquisition device and the valve opening controller are both connected to the power plant control system. The control port of the signal acquisition device is connected to the first control port of the power plant control system, and the control port of the valve opening controller is connected to the second control port of the power plant controller.

[0031] A temperature sensor is installed at the upper guide bearing of the upper guide cooler in the technical water supply system. A pressure transmitter, a flow meter, and an electric ball valve with a stepper motor are installed on the pipeline from the upper guide cooler to the downstream tailwater. The data output terminals of the temperature sensor, pressure transmitter, flow meter, and electric ball valve with stepper motor are all connected to the data input terminal of the signal acquisition device. The first control output terminal of the valve opening controller is connected to the control input terminal of the electric ball valve with stepper motor.

[0032] A pressure transmitter A is installed at the downstream tailwater outlet. The data output terminal of pressure transmitter A is connected to the data input terminal of the signal acquisition unit. The pressure value of the downstream tailwater outlet collected by pressure transmitter A corresponds to the height of the tailwater outlet, triggering the opening of the cooler pipe valve to affect the water flow pressure value, so as to adjust the pressure difference between the inlet and outlet, ensuring that the water flow can overcome the friction loss and local loss and smoothly discharge the water to the tailwater, thereby removing the excess heat generated by the unit.

[0033] The fifth control output terminal of the valve opening controller is connected to the control input terminal of the electric ball valve five with a stepper motor installed in the downstream tailwater discharge pipeline; the sixth control output terminal of the valve opening controller is connected to the control input terminal of the electric ball valve six with a stepper motor installed in the water intake; the seventh control output terminal of the valve opening controller is connected to the control input terminal of the pressure reducing valve installed in the seepage collection well; an electromagnetic flow meter is connected to the pipeline of the electric ball valve five with a stepper motor, and the data output terminal of the electromagnetic flow meter is connected to the data input terminal of the signal acquisition device; a pressure transmitter five is connected to the pipeline of the pressure reducing valve in the seepage collection well, and the data output terminal of the pressure transmitter five is connected to the data input terminal of the signal acquisition device.

[0034] In other embodiments, a temperature sensor is installed at the location of the generator air cooler, and a pressure transmitter, a flow meter, and an electric ball valve with a stepper motor are installed on the pipeline from the generator air cooler to the downstream tailwater. The data output terminals of the temperature sensor, pressure transmitter, flow meter, and electric ball valve with stepper motor are all connected to the data input terminal of the signal acquisition device. The second control output terminal of the valve opening controller is connected to the control input terminal of the electric ball valve with stepper motor.

[0035] In other embodiments, a temperature sensor three is installed at the thrust bearing position of the push cooler, and a pressure transmitter three, a flow meter three, and an electric ball valve three with a stepper motor are installed on the pipeline from the push cooler to the downstream tailwater. The data output terminals of the temperature sensor three, the pressure transmitter three, the flow meter three, and the electric ball valve three with a stepper motor are all connected to the data input terminal of the signal acquisition unit. The third control output terminal of the valve opening controller is connected to the control input terminal of the electric ball valve three with a stepper motor.

[0036] In other embodiments, a temperature sensor four is installed at the water guide bearing position of the water-conducting cooler, and a pressure transmitter four, a flow meter four, and an electric ball valve four with a stepper motor are installed on the pipeline from the water-conducting cooler to the downstream tailwater. The data output terminals of the temperature sensor four, pressure transmitter four, flow meter four, and electric ball valve four with a stepper motor are all connected to the data input terminal of the signal acquisition device; the fourth control output terminal of the valve opening controller is connected to the control input terminal of the electric ball valve four with a stepper motor.

[0037] In other embodiments, the power plant control system includes an AI control system.

[0038] In other embodiments, a water supply system based on relative flow rate and pressure difference control is specifically provided, including a water supply throttling device based on relative flow rate and pressure difference control as described in any of the above embodiments.

[0039] The working process of this utility model is as follows:

[0040] A temperature sensor 3 is additionally installed at the upper guide bearing position of the upper guide cooler in the current power plant's water supply system. A pressure transmitter 4, a flow meter 5, and an electric ball valve 6 with a stepper motor are installed along the drainage path, along with a corresponding signal acquisition unit 1 and valve opening controller 2. Both the signal acquisition unit 1 and the valve opening controller 2 are connected to the power plant's PLC control system. The control port of the signal acquisition unit 1 is connected to the first control port of the PLC controller, and the control port of the valve opening controller is connected to the second control port of the PLC controller. The temperature sensor 3 is connected to the signal acquisition unit 1. The acquired temperature value corresponds to the required relative flow rate of cooling water. Once the corresponding temperature condition is acquired, the valve opening of the corresponding electric ball valve is triggered, thereby reducing the valve opening to achieve a throttling effect while ensuring that the internal temperature of the cooler remains constant. Furthermore, a pressure transmitter A is installed at the downstream tailrace outlet. The data output of pressure transmitter A is connected to the data input of a signal acquisition unit. The pressure value at the downstream tailrace outlet, collected by pressure transmitter A, corresponds to the tailrace outlet height, triggering the opening of the cooler pipe valves to affect the water flow pressure. This adjusts the pressure difference between the inlet and outlet, ensuring that the water flow can smoothly discharge to the tailrace while overcoming friction loss and local losses, thereby removing excess heat generated by the unit. With a certain redundancy, the system outlet main valve can be closed to the maximum extent to achieve the best throttling effect. After implementing this device structure, it can replace the existing method of manually adjusting valves, saving energy and increasing efficiency, and ensuring the stable operation of the unit.

[0041] The remaining technical features in this embodiment can be flexibly selected by those skilled in the art to meet different specific practical needs. However, it is obvious to those skilled in the art that these specific details are not necessary to implement this utility model. In other instances, to avoid obscuring this utility model, well-known components, structures, or parts are not specifically described, and all are within the scope of technical protection defined by the claims of this utility model.

[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" are used in a broad sense and should be interpreted broadly by those skilled in the art. For example, it can refer to a fixed connection, a movable connection, an integral connection, or a partial connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal connection of two components, etc. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. That is, the expression of the written language can flexibly correspond to the implementation of the actual technology. The expression of the written language (including the drawings) in the specification of this utility model does not constitute any single limiting interpretation of the claims.

[0043] Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims. In the above description, numerous specific details have been set forth to provide a thorough understanding of this utility model. However, it will be apparent to those skilled in the art that these specific details are not necessary to implement this utility model. In other instances, well-known techniques have not been specifically described to avoid obscuring this utility model.

Claims

1. A water supply throttling device based on relative flow rate and pressure difference control, characterized in that, include: Signal acquisition unit, valve opening controller, multiple temperature sensors, multiple pressure transmitters, multiple flow meters and multiple electric ball valves with stepper motors; The signal acquisition device and the valve opening controller are both connected to the power plant control system. The control port of the signal acquisition device is connected to the first control port of the power plant control system, and the control port of the valve opening controller is connected to the second control port of the power plant controller. A temperature sensor is installed at the upper guide bearing of the upper guide cooler in the technical water supply system. A pressure transmitter, a flow meter, and an electric ball valve with a stepper motor are installed on the pipeline from the upper guide cooler to the downstream tailwater. The data output terminals of the temperature sensor, pressure transmitter, flow meter, and electric ball valve with stepper motor are all connected to the data input terminal of the signal acquisition device. The first control output terminal of the valve opening controller is connected to the control input terminal of the electric ball valve with stepper motor. A pressure transmitter A is installed at the downstream tailwater outlet. The data output terminal of pressure transmitter A is connected to the data input terminal of the signal acquisition unit. The pressure value of the downstream tailwater outlet collected by pressure transmitter A corresponds to the height of the tailwater outlet, triggering the opening of the cooler pipe valve to affect the water flow pressure value, so as to adjust the pressure difference between the inlet and outlet, ensuring that the water flow can overcome the friction loss and local loss and smoothly discharge the water to the tailwater, thereby removing the excess heat generated by the unit. The fifth control output terminal of the valve opening controller is connected to the control input terminal of the electric ball valve five with a stepper motor installed in the downstream tailwater discharge pipeline; the sixth control output terminal of the valve opening controller is connected to the control input terminal of the electric ball valve six with a stepper motor installed in the water intake; the seventh control output terminal of the valve opening controller is connected to the control input terminal of the pressure reducing valve installed in the seepage collection well; an electromagnetic flow meter is connected to the pipeline of the electric ball valve five with a stepper motor, and the data output terminal of the electromagnetic flow meter is connected to the data input terminal of the signal acquisition device; a pressure transmitter five is connected to the pipeline of the pressure reducing valve in the seepage collection well, and the data output terminal of the pressure transmitter five is connected to the data input terminal of the signal acquisition device.

2. The water supply throttling device based on relative flow rate and pressure difference control according to claim 1, characterized in that, A temperature sensor is installed at the location of the generator air cooler. A pressure transmitter, a flow meter, and an electric ball valve with a stepper motor are installed on the pipeline from the generator air cooler to the downstream tailwater. The data output terminals of the temperature sensor, pressure transmitter, flow meter, and electric ball valve with stepper motor are all connected to the data input terminal of the signal acquisition device. The second control output terminal of the valve opening controller is connected to the control input terminal of the electric ball valve with stepper motor.

3. The water supply throttling device based on relative flow rate and pressure difference control according to claim 1, characterized in that, A temperature sensor is installed at the thrust bearing position of the push cooler. A pressure transmitter, a flow meter, and an electric ball valve with a stepper motor are installed on the pipeline from the push cooler to the downstream tailwater. The data output terminals of the temperature sensor, pressure transmitter, flow meter, and electric ball valve with stepper motor are all connected to the data input terminal of the signal acquisition device. The third control output terminal of the valve opening controller is connected to the control input terminal of the electric ball valve with stepper motor.

4. The water supply throttling device based on relative flow rate and pressure difference control according to claim 1, characterized in that, A temperature sensor four is installed at the water guide bearing position of the water-guided cooler. A pressure transmitter four, a flow meter four, and an electric ball valve four with a stepper motor are installed on the pipeline from the water-guided cooler to the downstream tailwater. The data output terminals of the temperature sensor four, pressure transmitter four, flow meter four, and electric ball valve four with a stepper motor are all connected to the data input terminal of the signal acquisition device. The fourth control output terminal of the valve opening controller is connected to the control input terminal of the electric ball valve four with a stepper motor.

5. The water supply throttling device based on relative flow rate and pressure difference control according to claim 1, characterized in that, The power plant control system includes an AI control system.

6. A water supply throttling system based on relative flow rate and pressure difference control, characterized in that, The water supply throttling device based on relative flow rate and pressure difference control, as described in any one of claims 1 to 5.

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