Control system based on secondary network water supply temperature

Abstract

The utility model discloses a control system based on secondary network water supply temperature, and belongs to the technical field of heat supply systems. In order to accurately control the water supply temperature of the secondary network, the system comprises a data acquisition module, a control module, an execution module and a power supply module, the data acquisition module comprises a temperature sensor, a data acquisition unit and a calibration device; the execution module comprises an electric control valve, a valve driving unit and a valve position feedback device; the temperature sensor is connected with the data acquisition unit, the data acquisition unit is connected with the calibration device, the calibration device is connected with the control module, the control module is connected with the valve driving unit, the valve driving unit is connected with the electric control valve, the electric control valve is connected with the valve position feedback device, and the valve position feedback device is connected with the control module. The power supply module is connected with the data acquisition module, the control module and the execution module. According to the utility model, the stability and accuracy of water supply temperature are obviously improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating systems, and in particular relates to a control system based on the water supply temperature of a secondary network. Background Art

[0002] Central heating systems typically consist of a primary heating network and a secondary heating network. The primary heating network is responsible for transporting heat from the heat source to each residential area, while the secondary heating network is responsible for distributing the heat to each user's building. In actual operation, fluctuations in the secondary network's water supply temperature directly affect the user's heating comfort. In the secondary network water supply system of central heating, precise control of the water supply temperature is crucial to ensuring heating quality, improving energy efficiency, and meeting user comfort needs. Existing secondary network water supply temperature control mainly relies on manual adjustment, which is inefficient and prone to excessively high or low water supply temperatures. Summary of the Invention

[0003] The following is a brief overview of the present invention to provide a basic understanding of certain aspects of the present invention. It should be understood that this overview is not an exhaustive overview of the present invention. It is not intended to identify key or important aspects of the present invention, nor is it intended to limit the scope of the present invention. Its purpose is simply to present certain concepts in a simplified form as a prelude to the more detailed description discussed later.

[0004] The problem to be solved by the utility model is to accurately control the water supply temperature of the secondary network, and propose a control system based on the water supply temperature of the secondary network.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A control system based on the water supply temperature of the secondary network, comprising a data acquisition module, a control module, an execution module, and a power supply module;

[0007] The data acquisition module includes a temperature sensor, a data acquisition unit, and a calibration device, and the execution module includes an electric regulating valve, a valve drive unit, and a valve position feedback device;

[0008] The temperature sensor is connected to a data acquisition unit, the data acquisition unit is connected to a calibration device, the calibration device is connected to a control module, the control module is connected to a valve drive unit, the valve drive unit is connected to an electric regulating valve, the electric regulating valve is connected to a valve position feedback device, and the valve position feedback device is connected to the control module;

[0009] The power supply module is connected to the data acquisition module, the control module and the execution module respectively.

[0010] Furthermore, the temperature sensor is a PT100 high-precision platinum thermal resistance temperature sensor.

[0011] Furthermore, the control module is a programmable logic controller S7-200 SMART series PLC.

[0012] Furthermore, the model of the power supply module is RSP-320-24 switching power supply.

[0013] Furthermore, the model of the electric regulating valve is BELIMOLRB24, and the electric regulating valve is installed on the secondary network water supply pipeline.

[0014] The beneficial effects of the utility model are:

[0015] The utility model discloses a control system based on the secondary network water supply temperature, which realizes the precise control of the secondary network water supply temperature and significantly improves the stability and accuracy of the water supply temperature; it adopts high-performance data acquisition module, control module and execution module closed-loop control to improve the reliability and durability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of a control system based on secondary network water supply temperature described in the present utility model. DETAILED DESCRIPTION

[0017] Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. For the sake of clarity and conciseness, not all features of the actual embodiments are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the process of developing any such actual implementation in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and these constraints may vary from implementation to implementation. In addition, it should be understood that although the development work may be very complex and time-consuming, it is merely a routine task for those skilled in the art who benefit from the disclosure of the present invention.

[0018] It is also necessary to explain here that, in order to avoid obscuring the present invention due to unnecessary details, the accompanying drawings only show the device structure and / or processing steps that are closely related to the solution according to the present invention, while other details that are not closely related to the present invention are omitted.

[0019] In order to further understand the content, features and effects of the utility model, the following specific implementation methods are given as examples, and the attached Figure 1 The detailed instructions are as follows:

[0020] A control system based on the water supply temperature of the secondary network, characterized by comprising a data acquisition module 1, a control module 2, an execution module 3, and a power supply module 4;

[0021] The data acquisition module 1 includes a temperature sensor 1-1, a data acquisition unit 1-2, and a calibration device 1-3. The execution module 3 includes an electric regulating valve 3-1, a valve drive unit 3-2, and a valve position feedback device 3-3.

[0022] The temperature sensor 1-1 is connected to the data acquisition unit 1-2, the data acquisition unit 1-2 is connected to the calibration device 1-3, the calibration device 1-3 is connected to the control module 2, the control module 2 is connected to the valve drive unit 3-2, the valve drive unit 3-2 is connected to the electric control valve 3-1, the electric control valve 3-1 is connected to the valve position feedback device 3-3, and the valve position feedback device 3-3 is connected to the control module 2;

[0023] The power supply module 4 is connected to the data acquisition module 1 , the control module 2 , and the execution module 3 respectively.

[0024] Furthermore, the temperature sensor 1-1 is a PT100 high-precision platinum thermal resistance temperature sensor, which is used to detect the water supply temperature of the secondary network in real time, and its output end is connected to the input end of the data acquisition unit.

[0025] Furthermore, the control module 2 is a programmable logic controller S7-200 SMART series PLC, which receives temperature data transmitted by the temperature sensor and generates a control signal, and its output end is connected to the execution module.

[0026] Furthermore, the model of the power supply module 4 is RSP-320-24 switching power supply.

[0027] Furthermore, the model of the electric regulating valve 3-1 is BELIMOLRB24, and the electric regulating valve 3-1 is installed on the secondary network water supply pipeline.

[0028] Furthermore, the temperature sensor is installed in the water supply pipe of the secondary network for real-time detection of the water supply temperature. In order to ensure the accuracy and reliability of the temperature data, the temperature sensor uses a high-precision PT1000 iron resistance temperature sensor. These sensors have the characteristics of good linearity and high stability, and can provide accurate temperature measurement within a wide temperature range. The data acquisition unit processes and transmits the temperature data collected by the temperature sensor. The data acquisition unit includes an analog-to-digital converter (ADC), which converts the analog signal output by the sensor into a digital signal and transmits it to the control module through a data transmission module. The data acquisition unit has multi-channel input capabilities and can process data from multiple sensors at the same time to ensure comprehensive monitoring of the system. In order to ensure the accuracy of temperature detection, the system is equipped with a temperature sensor calibration device. The calibration device calibrates the temperature sensor regularly to eliminate the drift and error of the sensor. The calibration process can be performed automatically or manually. By comparing the data of the standard temperature source, the output of the sensor is adjusted to maintain high accuracy.

[0029] Furthermore, the model of the calibration device is Fluke 9142.

[0030] Furthermore, the control module is the core of the system. After receiving data transmitted by the data acquisition module, the control module uses a built-in processor to perform preliminary processing and analysis on the data. The control module can use a high-performance programmable logic controller (PLC) or industrial computer to ensure the efficiency and stability of data processing. It can generate corresponding control signals based on the preset temperature range, historical data, and real-time temperature changes. When the water supply temperature exceeds the preset range, the control module will immediately generate a control signal, which is transmitted to the execution module through the data transmission module to adjust the valve opening to achieve precise control of the water supply temperature.

[0031] Furthermore, the actuator module is a key component for controlling water supply temperature and includes an electric control valve, a valve drive unit, and a valve position feedback device. The electric control valve is installed on the water supply pipeline. Its primary function is to adjust the valve opening according to a control signal, thereby varying the flow rate of water supplied to the secondary network. The electric control valve is driven by a high-precision stepper motor, offering fast response and high-precision control. The valve drive unit is a crucial component of the electric control valve, responsible for converting the control signal into the mechanical movement of the valve. The drive unit comprises a drive motor, a reducer, and a transmission mechanism. The drive motor is a servo motor, offering high precision and fast response. The reducer and transmission mechanism are manufactured through precision machining to ensure accurate adjustment of the valve opening. To achieve precise control of the valve opening, the system is equipped with a valve position feedback device. The valve position feedback device includes a valve position sensor and feedback circuitry. The valve position sensor detects the valve opening in real time and feeds the detected valve position signal back to the control module. Based on the difference between the valve position signal and the control signal, the controller adjusts the drive motor's operation to ensure that the valve opening is consistent with the control signal.

[0032] Furthermore, the model of the valve drive unit is SMC LEY25C3B-100, and the model of the valve position feedback device is Honeywell RVL-500.

[0033] Furthermore, the power module provides stable power supply support for the data acquisition module, control module, and execution module in the system. The power module can also ensure the normal operation of the system during power outages, ensuring the continuity and reliability of water supply temperature control.

[0034] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0035] Although the present application has been described above with reference to specific embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, as long as there are no structural conflicts, the various features of the embodiments disclosed herein may be combined with each other in any manner, and the omission of an exhaustive description of these combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims.

Claims

1. A control system based on secondary network water supply temperature, characterized in that: It includes a data acquisition module (1), a control module (2), an execution module (3), and a power supply module (4); The data acquisition module (1) comprises a temperature sensor (1-1), a data acquisition unit (1-2), and a calibration device (1-3); the execution module (3) comprises an electric regulating valve (3-1), a valve drive unit (3-2), and a valve position feedback device (3-3); The temperature sensor (1-1) is connected to a data acquisition unit (1-2), the data acquisition unit (1-2) is connected to a calibration device (1-3), the calibration device (1-3) is connected to a control module (2), the control module (2) is connected to a valve drive unit (3-2), the valve drive unit (3-2) is connected to an electric regulating valve (3-1), the electric regulating valve (3-1) is connected to a valve position feedback device (3-3), and the valve position feedback device (3-3) is connected to the control module (2); The power supply module (4) is respectively connected to the data acquisition module (1), the control module (2), and the execution module (3).

2. A control system based on secondary network water supply temperature according to claim 1, characterized in that: The model of the temperature sensor (1-1) is a PT100 high-precision platinum thermal resistance temperature sensor.

3. A control system based on secondary network water supply temperature according to claim 2, characterized in that: The control module (2) is a programmable logic controller S7-200 SMART series PLC.

4. A control system based on secondary network water supply temperature according to claim 3, characterized in that: The model of the power supply module (4) is RSP-320-24 switching power supply.

5. A control system based on secondary network water supply temperature according to claim 4, characterized in that: The model of the electric regulating valve (3-1) is BELIMOLRB24, and the electric regulating valve (3-1) is installed on the secondary network water supply pipeline.

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