Intelligent pressure regulating valve for thermal control system of thermal power plant
The design of the intelligent pressure regulating valve solves the problems of slow response speed and low control accuracy of traditional pressure regulating valves, realizing fast and accurate pressure control and improving the operating efficiency and safety of thermal control systems in thermal power plants.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XUZHOU CHINA RESOURCES POWER CO LTD
- Filing Date
- 2025-05-26
- Publication Date
- 2026-05-05
AI Technical Summary
Traditional pressure regulating valves have slow response speed and low control accuracy, resulting in lag in system pressure regulation, which affects power generation efficiency and equipment life. They also have poor stability and are susceptible to interference factors, leading to unstable system operation, increased energy consumption and failure risk.
The intelligent pressure regulating valve, including valve body, sensor, controller and actuator, quickly and accurately adjusts the valve opening by monitoring the fluid pressure and temperature in the pipeline in real time, so as to achieve fast, accurate and stable pressure control.
It improves system response speed and control accuracy, reduces pressure fluctuations, enhances system stability and reliability, optimizes operating efficiency and energy saving, ensures system safety and fault early warning, and ensures safe and efficient operation of equipment.
Smart Images
Figure CN224201212U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of thermal control system technology for thermal power plants, and in particular to an intelligent pressure regulating valve for thermal control systems in thermal power plants. Background Technology
[0002] In the thermal control system of thermal power plants, pressure regulating valves are critical equipment, essential for maintaining stable system pressure and ensuring the safe and efficient operation of equipment. However, traditional pressure regulating valves have several problems. On the one hand, their response speed is slow; when faced with pressure fluctuations, they cannot adjust the valve opening in time, resulting in delayed system pressure regulation and affecting power generation efficiency and equipment lifespan. On the other hand, their control accuracy is low; affected by valve characteristics, fluid characteristics, and external disturbances (such as pipeline vibration and pressure fluctuations), they are difficult to precisely control fluid pressure, easily causing system instability, increasing energy consumption, and increasing the risk of failure. In addition, traditional regulating valves have poor stability; in complex and variable operating environments, they are easily affected by interference factors, leading to control system instability or oscillation, affecting the normal operation of the unit and the quality of power generation. Utility Model Content
[0003] This application provides an intelligent pressure regulating valve for a thermal control system in a thermal power plant, which enables rapid, accurate, and stable pressure control, thereby improving the operating efficiency and safety of the thermal control system.
[0004] This application provides an intelligent pressure regulating valve for a thermal control system in a thermal power plant, comprising:
[0005] Valve body, used to control the opening and closing of pipelines;
[0006] Sensors are used to monitor the pressure and temperature of fluids in the pipeline in real time and send the collected temperature and pressure information to the controller;
[0007] The controller is used to calculate the corresponding control quantity based on the temperature and pressure information, and send the control signal to the actuator.
[0008] An actuator is used to control the opening degree of the valve body.
[0009] In the above technical solution, a valve body is used to control the opening and closing of the pipeline; a sensor is used to monitor the pressure and temperature of the fluid in the pipeline in real time and send the collected temperature and pressure information to the controller; the controller is used to calculate the corresponding control quantity based on the temperature and pressure information and send the control signal to the actuator; the actuator is used to control the opening degree of the valve body; thus, fast, accurate and stable pressure control is achieved, improving the operating efficiency and safety of the thermal control system.
[0010] In one possible implementation, the sensor includes a pressure sensor and a temperature sensor, wherein,
[0011] The pressure sensor is used to monitor the pressure of the fluid in the pipeline in real time;
[0012] The temperature sensor is used to monitor the temperature of the fluid inside the pipeline in real time.
[0013] In one possible implementation, the pressure sensor and the temperature sensor are integrated into a single unit.
[0014] In one possible implementation, the pressure sensor is a resistance strain gauge pressure sensor or a piezoelectric pressure sensor.
[0015] In one possible implementation, the temperature sensor is a platinum resistance thermometer or a thermocouple sensor.
[0016] In one specific implementation, the valve body is a column valve or a gate valve.
[0017] In one possible implementation, the actuator is a linear motor.
[0018] In one possible implementation, the controller, the actuator, and the valve body are integrated into one unit.
[0019] In one possible implementation, the valve body is made of a high-pressure resistant material.
[0020] In one specific implementation, the high-pressure resistant material is polyetheretherketone or aluminum oxide. Attached Figure Description
[0021] Figure 1 A schematic diagram of the structure of an intelligent pressure regulating valve for a thermal control system in a thermal power plant, provided in an embodiment of this application;
[0022] Figure 2 An electrical block diagram of an intelligent pressure regulating valve for a thermal control system in a thermal power plant, provided in an embodiment of this application.
[0023] Among them, 1-valve body, 2-actuator, 3-controller, and 4-sensor. Detailed Implementation
[0024] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present application will become clearer and more apparent.
[0025] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.
[0026] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.
[0027] To facilitate understanding of the intelligent pressure regulating valve for thermal control systems in thermal power plants provided in this application embodiment, its application scenario will be explained first. The intelligent pressure regulating valve for thermal control systems in thermal power plants provided in this application embodiment is used to achieve rapid, accurate, and stable pressure control, improving the operating efficiency and safety of the thermal control system. In thermal control systems of thermal power plants, pressure regulating valves are key equipment, crucial for maintaining stable system pressure and ensuring the safe and efficient operation of equipment. However, traditional pressure regulating valves have many problems. On the one hand, their response speed is slow; when faced with pressure fluctuations, they cannot adjust the valve opening in time, resulting in delayed system pressure regulation, affecting power generation efficiency and equipment lifespan. On the other hand, their control accuracy is low; affected by valve characteristics, fluid characteristics, and external interference (such as pipeline vibration and pressure fluctuations), it is difficult to accurately control fluid pressure, easily causing system instability, increasing energy consumption and failure risks. Furthermore, traditional regulating valves have poor stability; in complex and changing operating environments, they are easily affected by interference factors, leading to control system instability or oscillation, affecting the normal operation of the unit and power generation quality. Therefore, this application provides an intelligent pressure regulating valve for a thermal control system in a thermal power plant, to achieve rapid, accurate, and stable pressure control, thereby improving the operating efficiency and safety of the thermal control system. The following detailed description, in conjunction with specific accompanying drawings, illustrates the embodiments.
[0028] refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of an intelligent pressure regulating valve for a thermal control system in a thermal power plant, provided in an embodiment of this application; Figure 2 An electrical block diagram of an intelligent pressure regulating valve for a thermal control system in a thermal power plant, provided in an embodiment of this application.
[0029] exist Figure 1 and Figure 2 This application provides an intelligent pressure regulating valve for a thermal control system in a thermal power plant, comprising:
[0030] Valve body 1 is used to control the opening and closing of the pipeline;
[0031] Sensor 4 is used to monitor the pressure and temperature of the fluid in the pipeline in real time and send the collected temperature and pressure information to controller 3;
[0032] The controller is used to calculate the corresponding control quantity based on the temperature and pressure information, and send the control signal to the actuator 2;
[0033] An actuator is used to control the opening degree of the valve body.
[0034] In the above technical solution, a valve body is used to control the opening and closing of the pipeline; a sensor is used to monitor the pressure and temperature of the fluid in the pipeline in real time and send the collected temperature and pressure information to the controller; the controller is used to calculate the corresponding control quantity based on the temperature and pressure information and send the control signal to the actuator; the actuator is used to control the opening degree of the valve body; thus, fast, accurate and stable pressure control is achieved, improving the operating efficiency and safety of the thermal control system.
[0035] Specifically, the beneficial effects of using intelligent pressure regulating valves in the thermal control system of this thermal power plant include:
[0036] Improve system response speed and control accuracy
[0037] Rapid Response to Pressure Changes: In the thermal control system of a thermal power plant, the fluid pressure in the pipelines may change rapidly due to various factors (such as sudden changes in unit load and fluctuations in steam parameters). This intelligent pressure regulating valve monitors pressure and temperature information in real time through sensors. The controller can quickly receive this data and calculate the corresponding control quantity, promptly sending control signals to the actuator to quickly adjust the valve opening. Compared with traditional regulating valves, its response time is significantly shortened, enabling it to quickly adapt to dynamic pressure changes and effectively avoiding system instability or equipment damage caused by pressure regulation lag.
[0038] Precise pressure parameter control: Based on precise temperature and pressure information collected by sensors, the controller uses advanced algorithms to calculate precise control parameters, thereby achieving precise control of the valve opening. This precise control ensures that the fluid pressure in the pipeline remains stable near the set value, reducing pressure fluctuations. In thermal power plants, precise pressure control is crucial for ensuring boiler combustion stability, efficient turbine operation, and the energy balance of the thermal system, contributing to improved power generation efficiency and quality.
[0039] Enhance system stability and reliability
[0040] Reducing the impact of pressure fluctuations on the system: Pressure fluctuations can have many adverse effects on the thermal control system of a thermal power plant, such as increased pipeline vibration, equipment fatigue damage, and increased instrument measurement errors. This intelligent pressure regulating valve can effectively reduce pressure fluctuations through rapid and precise pressure regulation, making the system operate more smoothly. A stable pressure environment helps extend equipment life, reduce equipment maintenance costs, improve the overall reliability of the system, reduce downtime accidents caused by abnormal pressure, and ensure the continuous and stable operation of the power plant.
[0041] Adapting to Complex Operating Conditions: Thermal power plants operate under complex and ever-changing conditions. The pressure and temperature characteristics of fluids within pipelines vary depending on load, season, and fuel type. The sensors in this intelligent pressure regulating valve can detect these changes in real time and feed the information back to the controller. The controller then automatically adjusts the control parameters according to a preset control strategy, ensuring the valve always adapts to different operating conditions. This adaptive capability significantly improves the system's stability and reliability in complex environments, ensuring the power plant maintains optimal performance under various operating conditions.
[0042] Optimize system operating efficiency and reduce energy consumption
[0043] Improving energy efficiency: Precise pressure control can optimize the thermodynamic cycle of thermal power plants. In steam turbine systems, stable steam pressure ensures that the turbine operates under optimal conditions, improving steam efficiency and reducing energy loss. Simultaneously, reasonable pressure control in feedwater and cooling water systems helps reduce pump energy consumption, improves the overall energy efficiency of the thermal control system, thereby achieving energy conservation and emission reduction goals and lowering power generation costs.
[0044] Reduced equipment energy consumption and operating costs: Because this intelligent pressure regulating valve can quickly and accurately adjust pressure, it avoids excessive equipment operation or frequent start-stop cycles caused by improper pressure regulation. For example, in the operation of pumps, stable pressure can reduce pump head variations and lower pump energy consumption; in equipment such as fans, proper pressure control also helps reduce fan power consumption. Furthermore, by reducing wear and malfunctions caused by abnormal pressure, it lowers equipment maintenance and replacement costs, further reducing the operating costs of the power plant.
[0045] Ensuring system security and fault early warning
[0046] Real-time monitoring and safety protection: Sensors monitor the pressure and temperature of the fluid in the pipeline in real time. Once the pressure or temperature exceeds the set safety range, the controller can react quickly, adjusting the valve opening or taking other safety measures, such as issuing alarm signals or activating backup equipment, to prevent further escalation of the accident. This real-time monitoring and safety protection function can effectively avoid safety accidents such as pipeline rupture, equipment damage, fire, and explosion caused by excessively high or low pressure, ensuring the safety of personnel and equipment in thermal power plants.
[0047] Fault Diagnosis and Early Warning Function: This intelligent pressure regulating valve possesses a certain fault diagnosis capability. By analyzing and processing the data collected by the sensors, the controller can detect potential faults within the regulating valve itself, such as sensor malfunctions, actuator malfunctions, and valve body leakage, and promptly issue fault warning signals. This allows maintenance personnel to identify equipment problems early, perform timely repairs and replacements, prevent the fault from worsening, reduce downtime, and improve system maintainability and safety.
[0048] In one possible implementation, the sensor includes a pressure sensor and a temperature sensor, wherein,
[0049] The pressure sensor is used to monitor the pressure of the fluid in the pipeline in real time;
[0050] The temperature sensor is used to monitor the temperature of the fluid inside the pipeline in real time.
[0051] Specifically, the beneficial effects include: the pressure and temperature sensors have clearly defined functions, enabling accurate acquisition of key parameters of the fluid within the pipeline. Real-time pressure monitoring allows for timely understanding of fluid forces, ensuring stable system pressure; temperature monitoring prevents equipment performance and fluid characteristics from being affected by temperature anomalies. Together, they provide comprehensive data to the controller, facilitating rapid and precise adjustment of valve openings and improving the stability, safety, and operational efficiency of the thermal control system.
[0052] In one possible implementation, the pressure sensor and the temperature sensor are integrated into a single unit.
[0053] Specifically, the beneficial effects include: firstly, reducing installation space requirements, making the equipment layout more compact and facilitating flexible arrangement within limited spaces; secondly, reducing installation difficulty and costs, avoiding the cumbersome procedures associated with separate installations. Simultaneously, the integrated design allows for more synchronized and accurate data acquisition, reducing errors caused by the independent operation of different sensors, providing more reliable data for subsequent control, and ensuring stable system operation.
[0054] In one possible implementation, the pressure sensor is a resistance strain gauge pressure sensor or a piezoelectric pressure sensor.
[0055] Specifically, the beneficial effects include: The use of resistance strain gauge pressure sensors offers advantages such as simple structure, low cost, suitability for large-scale applications, and sufficient accuracy to meet most thermal control requirements, providing stable and reliable pressure measurement. Piezoelectric pressure sensors offer high sensitivity and fast response, enabling timely capture of dynamic pressure changes. The variety of options allows for flexible selection based on different operating conditions, ensuring accurate pressure monitoring while balancing economy and adaptability, thereby improving the performance of the thermal control system.
[0056] In one possible implementation, the temperature sensor is a platinum resistance thermometer or a thermocouple sensor.
[0057] Specifically, the beneficial effects include: using platinum resistance thermometers offers high measurement accuracy and stability, enabling precise detection of minute temperature changes and ensuring accurate and reliable temperature data from the thermal control system, facilitating precise control. Thermocouple sensors offer fast response speed and a wide temperature measurement range, allowing for rapid adaptation to conditions with large temperature fluctuations. The flexibility in choosing between the two allows for leveraging their respective advantages to meet the needs of different scenarios, effectively improving the comprehensiveness and accuracy of temperature monitoring in the thermal control system and ensuring stable system operation.
[0058] In one specific implementation, the valve body is a column valve or a gate valve.
[0059] Specifically, the beneficial effects include: The use of column valves, with their compact structure and good flow capacity, allows for rapid response to control signals to regulate flow, reducing pressure loss and making them suitable for applications requiring precise flow regulation and fast response. Gate valves, on the other hand, offer superior sealing performance, completely shutting off the fluid, and are suitable for scenarios requiring frequent opening and closing or demanding sealing requirements. The flexible selection of either type can meet the needs of different thermal control systems in thermal power plants, ensuring stable and efficient system operation and improving regulation reliability.
[0060] In one possible implementation, the actuator is a linear motor.
[0061] Specifically, the advantages of using a linear motor as the actuator include: fast response speed, enabling rapid valve body movement based on control signals and quick pressure adjustment. Furthermore, the linear motor's simple structure reduces intermediate transmission links, improving system reliability and lowering the failure rate. Simultaneously, its high control precision allows for accurate control of the valve opening, ensuring accurate pressure regulation and contributing to the stable and efficient operation of the thermal control system in thermal power plants.
[0062] In one possible implementation, the controller, the actuator, and the valve body are integrated into one unit.
[0063] Specifically, the beneficial effects include: First, it reduces installation space, allowing for a more compact equipment layout and facilitating installation in limited spaces. Second, it reduces installation and commissioning difficulty and costs, avoiding the cumbersome process of installing multiple components separately. Third, the integrated design makes communication and coordination between components more efficient, accelerates response speed, and enables more precise and rapid adjustment of valve opening, improving pressure control and ensuring stable operation of the thermal control system.
[0064] In one possible implementation, the valve body is made of a high-pressure resistant material.
[0065] Specifically, the beneficial effects include: the ability to withstand the impact of high-pressure fluids within the pipeline, preventing valve body deformation and damage due to excessive pressure, and ensuring long-term stable operation of the equipment. This significantly extends the service life of the valve body, reduces the frequency of maintenance and replacement, and lowers maintenance costs. Simultaneously, a stable and reliable valve body helps maintain stable pressure in the thermal control system, improving the operational safety and efficiency of the entire thermal power plant system and reducing the risk of unexpected shutdowns.
[0066] In one specific implementation, the high-pressure resistant material is polyetheretherketone or aluminum oxide.
[0067] Specifically, the beneficial effects include: the use of polyetheretherketone (PEEK) offers excellent high-pressure resistance, enabling it to withstand the pressure of high-pressure fluids within pipelines. Furthermore, its corrosion resistance and self-lubricating properties reduce wear and extend valve life. Alumina also possesses high strength and high-pressure resistance, high hardness, and good chemical stability, resisting corrosion from high pressure and complex media. Both materials ensure reliable valve operation under high-pressure environments, reducing failure rates and improving the stability and safety of the thermal control system.
[0068] The installation and commissioning process of the intelligent pressure regulating valve for the thermal control system of the thermal power plant is as follows:
[0069] Install the intelligent pressure regulating valve on the corresponding pipeline of the thermal control system of the thermal power plant, ensuring that the valve's inlet and outlet directions are consistent with the fluid flow direction. Connect the electrical wiring of the actuator, controller, and sensor, and ground them.
[0070] Set the pressure setpoint and control parameters according to system requirements. Calibrate the sensor to ensure its measurement accuracy. Perform no-load testing to check whether the actuator moves flexibly and accurately, and whether the controller display is normal. Perform load testing to simulate pressure changes under actual working conditions, observe the valve's response speed and control accuracy, and further optimize the control parameters.
[0071] The operation and maintenance process of the intelligent pressure regulating valve used in the thermal control system of the thermal power plant is as follows:
[0072] During normal operation, the intelligent pressure regulating valve can automatically adjust its opening based on real-time monitored pressure signals to maintain stable system pressure. Operators can monitor the valve's operating status and system pressure in real time through the controller's human-machine interface and intervene manually when necessary.
[0073] Regularly inspect and maintain the intelligent pressure regulating valve, including cleaning the valve body, checking the lubrication of the actuator, and calibrating the measurement accuracy of the sensors. Regularly upgrade the software of the intelligent control module to optimize the control algorithm and improve system performance.
[0074] The specific structure and control method of the controller are well-known technologies and will not be elaborated here.
[0075] Those skilled in the art will know that this application can be implemented as a system, method, or computer program product.
[0076] Therefore, this disclosure can be implemented in the following forms: it can be entirely hardware, entirely software (including firmware, resident software, microcode, etc.), or a combination of hardware and software, generally referred to herein as a "circuit," "module," or "system." Furthermore, in some embodiments, this application can also be implemented as a computer program product in one or more computer-readable media, which contains computer-readable program code.
[0077] Any combination of one or more computer-readable media may be used. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device.
[0078] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application. Based on this, various substitutions and improvements can be made to this application, all of which fall within the protection scope of this application.
Claims
1. An intelligent pressure regulating valve for a thermal control system in a thermal power plant, characterized in that, include: Valve body, used to control the opening and closing of pipelines; Sensors are used to monitor the pressure and temperature of fluids in the pipeline in real time and send the collected temperature and pressure information to the controller; The controller is used to calculate the corresponding control quantity based on the temperature and pressure information, and send the control signal to the actuator. An actuator is used to control the opening degree of the valve body.
2. The intelligent pressure regulating valve for a thermal control system in a thermal power plant according to claim 1, characterized in that, The sensor includes a pressure sensor and a temperature sensor, wherein, The pressure sensor is used to monitor the pressure of the fluid in the pipeline in real time; The temperature sensor is used to monitor the temperature of the fluid inside the pipeline in real time.
3. The intelligent pressure regulating valve for a thermal control system in a thermal power plant according to claim 2, characterized in that, The pressure sensor and the temperature sensor are integrated into one unit.
4. The intelligent pressure regulating valve for a thermal control system in a thermal power plant according to claim 3, characterized in that, The pressure sensor is either a resistance strain gauge pressure sensor or a piezoelectric pressure sensor.
5. The intelligent pressure regulating valve for a thermal control system in a thermal power plant according to claim 4, characterized in that, The temperature sensor is a platinum resistance thermometer or a thermocouple sensor.
6. The intelligent pressure regulating valve for a thermal control system in a thermal power plant according to claim 5, characterized in that, The valve body is a column valve or a gate valve.
7. The intelligent pressure regulating valve for a thermal control system in a thermal power plant according to claim 6, characterized in that, The actuator is a linear motor.
8. The intelligent pressure regulating valve for a thermal control system in a thermal power plant according to claim 7, characterized in that, The controller, the actuator, and the valve body are integrated into one unit.
9. The intelligent pressure regulating valve for a thermal control system in a thermal power plant according to claim 8, characterized in that, The valve body is made of high-pressure resistant material.
10. The intelligent pressure regulating valve for a thermal control system in a thermal power plant according to claim 9, characterized in that, The high-pressure resistant material is polyetheretherketone or aluminum oxide.