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

Abstract

The utility model discloses a technical water supply throttling device and system based on relative flow control, which belongs to the field of technical water supply system structures of hydropower stations 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. The signal collector and the valve opening controller are both connected into a power station PLC control system, a control port of the signal collector is connected with a first control port of the PLC, and a control port of the valve opening controller is connected with a second control port of the PLC. The device can replace a manual valve adjusting mode, not only saves energy, but also improves efficiency, and can provide guarantee for stable operation of a unit.

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 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. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a technical water supply throttling device based on relative flow control. This device improves the structure of the technical water supply system and can avoid the problem of cooling water being wasted.

[0004] The objective of this utility model is achieved through the following solution:

[0005] A water supply throttling device based on relative flow control includes:

[0006] Signal acquisition unit, valve opening controller, multiple temperature sensors, multiple pressure transmitters, multiple flow meters and multiple electric ball valves with stepper motors;

[0007] The signal acquisition device and the valve opening controller are both connected to the power station PLC control system. The control port of the signal acquisition device 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.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] Furthermore, the PLC controller includes a modular PLC controller.

[0014] A relative flow control-based water supply system includes a relative flow control-based water supply throttling device as described in any of the preceding claims.

[0015] The beneficial effects of this utility model are:

[0016] This invention involves installing a temperature sensor, along with a corresponding signal acquisition unit and controller, at the cooler location in the technical water supply system. The temperature sensor data is transmitted to the controller via the signal acquisition unit. The acquired temperature value corresponds to the required relative flow rate of cooling water. Once the appropriate temperature condition is met, the corresponding electric ball valve is activated, thereby reducing the valve opening while maintaining a constant internal temperature in the cooler to achieve a throttling effect. This device structure can replace manual valve adjustment, saving energy and increasing efficiency, and ensuring the stable operation of the unit. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0019] All features disclosed in all embodiments of this specification, or all technical features implied in the disclosure, may be combined or substituted in any way, except for mutually exclusive technical features.

[0020] 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.

[0021] 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.

[0022] Before describing the embodiments, some necessary terms need to be explained. For example:

[0023] 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.

[0024] The various terms appearing in this application are used only for describing particular embodiments 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.

[0025] 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.

[0026] In one embodiment, such as Figure 1 As shown, a water supply throttling device based on relative flow control technology is characterized by comprising: a signal acquisition unit, a valve opening controller, multiple temperature sensors, multiple pressure transmitters, multiple flow meters, and multiple electric ball valves with stepper motors.

[0027] The signal acquisition device and the valve opening controller are both connected to the power station PLC control system. The control port of the signal acquisition device 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] In other embodiments, the PLC controller includes a modular PLC controller.

[0034] In other embodiments, a water supply system based on relative flow control is provided, characterized in that it includes a water supply throttling device based on relative flow control as described in any of the above embodiments.

[0035] The working process of this utility model is as follows:

[0036] An additional temperature sensor 3 is 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. 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.

[0037] 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.

[0038] 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.

[0039] 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 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 station PLC control system. The control port of the signal acquisition device 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. 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. 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 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 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 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 control according to claim 1, characterized in that, The PLC controller includes a modular PLC controller.

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

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