Heating station control device

Abstract

The utility model relates to a heating station control device, which is characterized in that each heat exchange station comprises a boiler, a heat exchanger, a water tank, a circulating pump, a make-up pump, a temperature sensor, a pressure sensor, a regulating valve, an electromagnetic valve and a control unit, the heat exchange station is connected with a heating user through the secondary water supply pipeline and the secondary water supply loop, the circulating pump is arranged on the primary water supply pipeline, one end of the water tank is connected with the make-up pump, the other end of the water tank is connected with the secondary water return pipeline through the electromagnetic valve, and the adjusting valve is arranged on the primary water return pipeline. The utility model has the advantages that the optical fiber connection between the master station PLCs and the servers of a plurality of heat exchange stations can be realized through the optical fiber transceivers, a heat supply station command center manager monitors the running state of equipment of each heat exchange station in real time through the large screen, if the equipment is abnormal, an alarm prompt is given on the large screen, the operation is simple, and the implementation is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of heating, in particular to a heating station control device. Background Art

[0002] Urban heating involves centrally generating heat for heating, which is then distributed and delivered to heating users. Many cities still rely solely on manual on-site inspections to monitor the performance of heating systems. However, if a pipeline leak occurs, heating departments struggle to detect and identify it immediately unless citizens promptly report it. This leads to slow repairs, low efficiency, large hot water leaks, and significant economic losses, creating an urgent need for improvement. Summary of the Invention

[0003] The purpose of the utility model is to provide a heating station control device, which is convenient for monitoring, does not require manual inspection, and improves the safety of urban heating.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0005] A heating station control device, the heating station includes a server and multiple heat exchange stations, each heat exchange station includes a boiler, a heat exchanger, a water tank, a circulation pump, a water supply pump, a temperature sensor, a pressure sensor, a regulating valve, a solenoid valve, and a control unit. The boiler is connected to the heat exchange station via a primary water supply pipeline and a primary return water pipeline. The heat exchange station is connected to the heating user via a secondary water supply pipeline and a secondary water supply loop. The circulation pump is arranged on the primary water supply pipeline. One end of the water tank is connected to the water supply pump, and the other end of the water tank is connected to the secondary return water pipeline via a solenoid valve. The regulating valve is arranged on the primary return water pipeline.

[0006] The primary water supply pipeline, primary return pipeline, secondary water supply pipeline, and secondary water supply circuit are all equipped with temperature sensors and pressure sensors. The water tank is equipped with a liquid level sensor. The liquid level sensor, temperature sensor, pressure sensor, circulation pump, water supply pump, regulating valve, and solenoid valve are all connected to the control unit, and the server is connected to the control unit.

[0007] The control unit includes a slave PLC and a main circuit. The liquid level sensor, the temperature sensor, the pressure sensor, the circulation pump, the water supply pump, the regulating valve, and the solenoid valve are connected to the slave PLC, and the slave PLC is connected to the main circuit.

[0008] The slave PLC includes a communication module 1, a power module, an analog input module, a digital output module, and an analog output module. The power module is used to provide working power. The communication module 1 is used to connect with the master PLC. The analog input module is connected to the liquid level sensor, the corresponding pressure sensor and the temperature sensor through ports respectively. The analog output module is connected to the regulating valve through the port. The digital output module is connected to the main circuit.

[0009] The master station PLC includes a CPU module, a communication module 2, a communication module 3, and a touch screen. The CPU module is connected to the touch screen through a port, the CPU module is connected to the communication module 2 and the communication module 3 through a port, the communication module 2 is connected to the communication module 1 through a port, and the communication module 3 is used to connect to the server.

[0010] Communication module three is connected to the slave station optical transceiver, the server is connected to multiple master station optical transceivers through a switch, and the slave station optical transceiver and the corresponding master station optical transceiver are connected through optical fibers.

[0011] The main circuit includes the circulation pump main circuit and the make-up water pump main circuit. The circulation pump main circuit includes the thermal overload relay FR1, contactor KM1, and circuit breaker QK1 connected to the circulation pump in sequence. The make-up water pump main circuit includes the thermal overload relay FR2, contactor KM2, and circuit breaker QK2 connected to the make-up water pump in sequence. The digital output module is connected to the coil of the relay group through the port, and the normally open contacts of the relay group are connected to the coil of contactor KM1, the coil of contactor KM2, and the solenoid valve respectively.

[0012] A relay group includes several relays.

[0013] The communication module 1, the power module, the analog input module, the digital output module, and the analog output module are connected through ports.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The CPU module is connected to the touch screen through a port. The operator can check the operating status of the equipment at any time through the touch screen, eliminating the need for manual regular inspections to see if the equipment is running, thus reducing labor intensity.

[0016] 2. The water tank is connected to the secondary return water pipeline through a solenoid valve. A regulating valve is installed on the primary return water pipeline. The operator can operate the solenoid valve and regulating valve to start and stop through the touch screen. The operator can also operate the circulation pump and water supply pump to start and stop through the touch screen. The operation is simple and easy to maintain.

[0017] 3. Fiber optic transceivers can be used to connect the master PLCs and servers of multiple heat exchange stations. Managers at the heating station command center can monitor the operating status of each heat exchange station equipment in real time through a large screen. If any equipment is abnormal, an alarm will be displayed on the large screen. The operation is simple and easy to implement.

[0018] 4. The digital output port is connected to the coil of the relay and connected to the corresponding device through the normally open contact of the relay to prevent damage to the digital output port of the PLC due to equipment failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the control device structure of each heating station.

[0020] Figure 2 It is the control principle distribution diagram of the heating station control device.

[0021] Figure 3 It is a schematic diagram of the control principle of the heating station control device. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below with reference to the accompanying drawings. However, it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0023] The following examples are implemented under the premise of the technical solution of the present utility model, and provide detailed implementation methods and specific operating processes, but the scope of protection of the present utility model is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[0024] [Example 1]

[0025] The urban heating station consists of multiple heat exchange stations. Before the transformation, the problems were as follows:

[0026] 1) The liquid level sensor installed on the water tank and the temperature and pressure detection instruments installed on the primary water supply pipeline, primary return pipeline, secondary water supply pipeline, and secondary return pipeline are all local instruments. Inspectors are required to regularly visit each heat exchange station to record the working status of the heating equipment;

[0027] 2) The circulating pump installed in the primary water supply pipeline and the water supply pump for the water tank rely on the operator to operate the control box next to the machine to realize the single start and stop of the equipment;

[0028] 3) A manual valve is installed on the primary return water pipeline, which can only be opened manually on site;

[0029] 4) It often occurs during the heating period, inspection record data is not true, slackness occurs from time to time, labor intensity is high, and manpower and material resources are wasted.

[0030] After the transformation, the machine side operation box was cancelled and the touch screen was used to operate the equipment for single start and single stop; the local instrument was changed to a sensor, and the sensor was connected to the slave PLC; the manual valve was changed to the solenoid valve D1 and the regulating valve PV, and the start and stop were carried out through the touch screen. Figures 1 to 3 A heating station control device, the heating station includes a server and multiple heat exchange stations, each heat exchange station includes a boiler, a heat exchanger, a water tank, a circulation pump, a make-up water pump, a temperature sensor, a pressure sensor, a regulating valve PV, a solenoid valve D1, and a control unit. The boiler is connected to the heat exchange station through a primary water supply pipeline and a primary return water pipeline. The heat exchange station is connected to the heating user through a secondary water supply pipeline and a secondary water supply loop. The circulation pump is arranged on the primary water supply pipeline, one end of the water tank is connected to the make-up water pump, and the other end of the water tank is connected to the secondary return water pipeline through a solenoid valve D1. The regulating valve PV is arranged on the primary return water pipeline; the primary water supply pipeline, the primary return water pipeline, the secondary water supply pipeline, and the secondary water supply loop are all provided with temperature sensors and pressure sensors, and a liquid level sensor is provided on the water tank.

[0031] The control unit includes a slave PLC and a main circuit. The slave PLC includes a communication module 1, a power module, an analog input module, a digital output module, and an analog output module. The power module is used to provide working power. The communication module 1 is used to connect to the master PLC. The master PLC includes a CPU module, a communication module 2, a communication module 3, and a touch screen. The CPU module is connected to the touch screen through a port. The CPU module is connected to the communication module 2 and the communication module 3 through a port. The communication module 2 is connected to the communication module 1 through a port. The communication module 3 is used to connect to the server; the communication module 3 is connected to the slave fiber optic transceiver. The server is connected to multiple master fiber optic transceivers through a switch. The slave fiber optic transceiver and the corresponding master fiber optic transceiver are connected. The main circuit includes a circulation pump main circuit and a feed water pump main circuit. The circulation pump main circuit includes a thermal overload relay FR1, a contactor KM1, and a circuit breaker QK1 connected to the circulation pump in sequence. The feed water pump main circuit includes a thermal overload relay FR2, a contactor KM2, and a circuit breaker QK2 connected to the feed water pump in sequence. The digital output module is connected to the coils of the relay groups K1 to K3 through the ports. The normally open contacts of the relay groups K1 to K3 are connected to the coils of the contactor KM1, the coil of the contactor KM2, and the solenoid valve D1 respectively.

[0032] Working principle:

[0033] 1) The nominal pressure of the primary water supply and return pipes and equipment of the unit is 1.6MPa, and the temperature resistance is 80℃; the nominal pressure of the secondary water supply and return pipes is 1.6MPa, and the temperature resistance is 80℃. The primary and secondary supply and return water pressure tests are 1.5 times the working pressure.

[0034] 2) Testing equipment:

[0035] a. Water supply temperature measurement range: primary side 0-100℃, secondary side 0-100℃ (measuring points include primary side supply and return water temperature, secondary side supply and return water temperature);

[0036] b. Pressure measurement range: primary side 0-1.0MPa, secondary side 0-1.0MPa.

[0037] 3) Regulating valve

[0038] The nominal pressure of the regulating valve is 1.6MPa and the temperature resistance is 100℃.

[0039] 4) Working process: The regulating valve is started and stopped and the opening is adjusted through the touch screen; the circulation pump is automatically controlled according to the set value of the secondary side supply and return water pressure difference; if the circulation pump fails during operation, the system will be stopped immediately and a remote alarm and sound and light alarm signals will be issued in time; shutdown protection for ultra-high pressure, ultra-low pressure, ultra-high temperature, frequency conversion, and motor failure.

[0040] The CPU module of the utility model is connected to the touch screen through a port, and the operator can check the operating status of the equipment at any time through the touch screen, without the need for manual regular inspection to see if the equipment is running, thereby reducing labor intensity; the water tank is connected to the secondary return water pipeline through a solenoid valve, and a regulating valve is set on the primary return water pipeline. The operator can operate the solenoid valve and the regulating valve to start and stop through the touch screen; the operator can also operate the circulation pump and the water supply pump to start and stop through the touch screen, which is simple to operate and easy to maintain; the optical fiber transceiver can be used to achieve optical fiber connection between the main station PLC and the server of multiple heat exchange stations, and the management personnel of the heating station command center can monitor the operating status of each heat exchange station equipment in real time through the large screen. If the equipment is abnormal, there will be an alarm prompt on the large screen, which is simple to operate and easy to implement; the digital output port is connected to the coil of the relay, and is connected to the corresponding equipment through the normally open contact of the relay, which is used to prevent the digital output port of the PLC from being damaged due to equipment failure.

Claims

1. A heating station control device, characterized in that: The heating station includes a server and multiple heat exchange stations. Each heat exchange station includes a boiler, a heat exchanger, a water tank, a circulation pump, a water supply pump, a temperature sensor, a pressure sensor, a regulating valve, a solenoid valve, and a control unit. The boiler is connected to the heat exchange station through a primary water supply pipeline and a primary return water pipeline. The heat exchange station is connected to the heating user through a secondary water supply pipeline and a secondary water supply loop. The circulation pump is installed on the primary water supply pipeline, one end of the water tank is connected to the water supply pump, and the other end of the water tank is connected to the secondary return water pipeline through a solenoid valve. The regulating valve is installed on the primary return water pipeline. The primary water supply pipeline, primary return pipeline, secondary water supply pipeline, and secondary water supply circuit are all equipped with temperature sensors and pressure sensors. The water tank is equipped with a liquid level sensor. The liquid level sensor, temperature sensor, pressure sensor, circulation pump, water supply pump, regulating valve, and solenoid valve are all connected to the control unit, and the server is connected to the control unit.

2. A heating station control device according to claim 1, characterized in that: The control unit includes a slave PLC, a main circuit, a liquid level sensor, a temperature sensor, a pressure sensor, a circulation pump, a water supply pump, a regulating valve, and a solenoid valve connected to the slave PLC, and the slave PLC is connected to the main circuit; The slave PLC includes a communication module 1, a power module, an analog input module, a digital output module, and an analog output module. The power module is used to provide working power. The communication module 1 is used to connect to the master PLC. The analog input module is connected to the liquid level sensor, the corresponding pressure sensor and the temperature sensor through the port. The analog output module is connected to the regulating valve through the port. The digital output module is connected to the main circuit. The main circuit includes a circulation pump main circuit and a water supply pump main circuit. The circulation pump main circuit includes a thermal overload relay FR1, a contactor KM1, and a circuit breaker QK1 connected to the circulation pump in sequence. The water supply pump main circuit includes a thermal overload relay FR2, a contactor KM2, and a circuit breaker QK2 connected to the water supply pump in sequence. The digital output module is connected to the coil of the relay group through the port, and the normally open contacts of the relay group are connected to the coil of the contactor KM1, the coil of the contactor KM2, and the solenoid valve respectively.

3. A heating station control device according to claim 2, characterized in that: The master station PLC includes a CPU module, a communication module 2, a communication module 3, and a touch screen. The CPU module is connected to the touch screen through a port, the CPU module is connected to the communication module 2 and the communication module 3 through a port, the communication module 2 is connected to the communication module 1 through a port, and the communication module 3 is used to connect to the server.

4. A heating station control device according to claim 3, characterized in that: The communication module three is connected to the slave station optical transceiver, the server is connected to multiple master station optical transceivers through a switch, and the slave station optical transceiver and the corresponding master station optical transceiver are connected through optical fibers.

5. A heating station control device according to claim 2, characterized in that: The relay group includes several relays.

6. A heating station control device according to claim 2, characterized in that: The communication module 1, the power module, the analog input module, the digital output module, and the analog output module are connected through ports.

Images