CN212565996U - Intelligent control system of heat exchange station - Google Patents
Intelligent control system of heat exchange station Download PDFInfo
- Publication number
- CN212565996U CN212565996U CN202021729071.2U CN202021729071U CN212565996U CN 212565996 U CN212565996 U CN 212565996U CN 202021729071 U CN202021729071 U CN 202021729071U CN 212565996 U CN212565996 U CN 212565996U
- Authority
- CN
- China
- Prior art keywords
- control module
- signal
- valve
- heat exchange
- plc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The utility model discloses a heat transfer station intelligence control system for it is big to solve heat transfer station maintenance pressure among the prior art, and it is long when maintaining to consume time, can't be according to weather condition automatic control, runs into the dangerous high problem of power failure problem. The method comprises the following steps: the PLC control module is in wireless communication with the upper computer, and the PLC control module and the equipment control module are sequentially connected with field equipment of the heat exchange station; the field equipment of the heat exchange station is characterized in that an electric ball valve is arranged on a primary water supply pipe network, a temperature control valve is arranged on a primary water return pipe network, a secondary water supply temperature sensor and a secondary water supply pressure sensor are arranged on a secondary water supply pipe network, a secondary water return temperature sensor and a secondary water return pressure sensor are arranged on a secondary water return pipe network, an outdoor temperature sensor is arranged at a user position, and a circulating pump and a water replenishing pump are controlled by a frequency converter; the equipment control module comprises a PLC automatic control module and a remote manual control module of the field equipment of the heat exchange station. The beneficial effect is for realizing the automatic operation of heat exchange station.
Description
Technical Field
The utility model relates to a heating power production and supply, automatic control technical field especially relate to a heat transfer station intelligence control system.
Background
With the rapid development of the social and economic level, the demand of people on heating is gradually increased, the requirement on heating quality is higher and higher, and the traditional single heating form cannot meet the demand of people at present.
The heat exchange station is a place where heat is concentrated and exchanged. The power plant is a primary line, the community is a secondary line, and the joint of a heat source (power plant) heat supply network (primary and secondary line pipe network) heat users (residential buildings and units) is a heating station. The heat exchange place transmits high-temperature hot water or steam generated by a thermal power plant to each residential area to transmit heat to an area pipe network, and the high-temperature heat of a primary network is exchanged to hot water of a secondary network and then supplied to users like a transformer.
The heat exchange station is used for automatically and continuously converting the heat obtained by the primary network into heating water required by a user. Namely, hot water (or steam) enters the plate heat exchanger from the primary side inlet of the unit for heat exchange and then flows out from the primary side outlet of the port; secondary side backwater enters the plate heat exchanger through a secondary side circulating water pump to carry out heat exchange, and hot water for heating is produced to meet the requirements of users.
The existing heat exchange station determines the outlet temperature of a user according to the current weather temperature and experience, the temperature of a plurality of heat exchange station stations is manually set in a central control room, the temperature difference between the day and the night in the northwest region can reach more than 20 ℃, the temperature cannot be adjusted in real time, the user often feels that the temperature at night is too low, and the temperature in the day is too high, so that a great deal of complaints are caused; when equipment in the heat exchange station fails, the manpower resources for maintaining the equipment are deficient, and often several people need to be responsible for equipment maintenance in the heat exchange station within 15 kilometers, so that the work of workers is overwhelmed, if the power system is powered off, the equipment in the heat exchange station loses power, all responsible water supply valves of a primary network in the station of the heat exchange station need to be turned off as soon as possible in a short time, otherwise, a secondary network is vaporized, so that a fault is caused, and extremely high potential safety hazard exists; at weather sudden change, extremely cold or wind blowing scheduling problem appear, or during the power supply after having a power failure, station moisturizing power supply in turn, starting equipment, the time spent overlength all can lead to the decline of power supply quality, causes a large amount of user complaints problem, greatly increased the staff and handled the pressure of heating work.
Disclosure of Invention
An embodiment of the utility model provides a heat transfer station intelligence control system for it is big to solve among the prior art heat transfer station maintenance pressure, and it is long when maintaining to consume time, can't be according to weather condition automatic control, runs into the dangerous high problem when having a power failure.
The embodiment of the utility model provides a heat exchange station intelligence control system, include: the system comprises a PLC control module, an equipment control module and heat exchange station field equipment; the PLC control module is in wireless communication with the upper computer, and the PLC control module and the equipment control module are sequentially connected with field equipment of the heat exchange station;
the heat exchange station field equipment comprises a primary water supply pipe network entering the heat exchanger, a secondary water return pipe network, a primary water return pipe network flowing out of the heat exchanger, and a secondary water supply pipe network, wherein the primary water supply pipe network is provided with an electric ball valve, the primary water return pipe network is provided with a temperature control valve, the secondary water supply pipe network is provided with a secondary water supply temperature sensor and a secondary water supply pressure sensor, the secondary water return pipe network is provided with a secondary water return temperature sensor and a secondary water return pressure sensor, the secondary water supply pipe network flows into a user radiator and then is connected into the secondary water return pipe network through a circulating pump, the water replenishing pump and a pressure relief valve are both arranged in the secondary water return pipe network, and an;
the temperature signal, the pressure signal, the valve signal and the pump signal collected in the heat exchange station field equipment are all connected with the input end of a PLC control module, and the output end of the PLC control module is all connected with a relay coil for controlling the heat exchange station field equipment, wherein the temperature signal is a secondary water supply temperature sensor signal, a secondary water return temperature sensor signal and an outdoor temperature sensor signal, and the pressure signal is a secondary water supply pressure sensor signal and a secondary water return pressure sensor signal;
the equipment control module comprises a PLC automatic control and remote manual control change-over switch of the heat exchange station field equipment, a PLC automatic control module and a remote manual control module of the heat exchange station field equipment.
Preferably, the PLC control module includes a PLC processor, an ethernet communication module, and an analog expansion module; the input end of the PLC processor is connected with the pump signal and the valve signal, the analog input end of the analog quantity expansion module is connected with the temperature signal and the pressure signal, and the analog output end of the analog quantity expansion module is connected with the frequency converter and the temperature control valve.
Preferably, the input end of the PLC processor is connected with: the system comprises a circulating pump, a water replenishing pump, an electric valve, a pressure release valve, a valve opening position signal, a valve closing position signal, a valve opening position signal and a valve closing position signal, wherein the circulating pump and the water replenishing pump respectively have a pump operation signal and a pump fault signal; each signal is connected with a signal indicator lamp in series;
the output end of the PLC processor is connected with: the system comprises a circulating pump, a water replenishing pump, a pressure release valve, an auxiliary contact access device control module and a heat exchange station field device, wherein the circulating pump and the water replenishing pump respectively have a pump starting relay coil, an electric valve and a pressure release valve respectively have a valve opening relay coil and a valve closing relay coil, each relay coil is connected with a signal indicator lamp in series, and the auxiliary contact access device control module of each relay is used for controlling the state of the heat exchange.
Preferably, the equipment control module comprises a remote manual control module of a circulating pump or a water replenishing pump and a remote manual control module of an electric ball valve or a pressure relief valve; the remote manual control module of the circulating pump or the water replenishing pump is connected with the thermal relay and the motor for controlling the thermal relay in sequence by controlling the first contactor of the remote manual control module; the PLC automatic control module of the circulating pump or the water replenishing pump gives a starting signal and a frequency signal of the frequency converter through the PLC control module, and the frequency converter is sequentially connected with a second contactor for controlling the frequency converter, a thermal relay and a motor for controlling the frequency converter;
the remote manual control module of the electric ball valve or the pressure relief valve is connected with an electric actuator of the electric ball valve or the pressure relief valve through an opening key, an opening stop key and a third relay for controlling the electric ball valve or the pressure relief valve which are connected in series, and is connected with the electric actuator of the electric ball valve or the pressure relief valve through a closing key, a closing stop key and a fourth relay for controlling the electric ball valve or the pressure relief valve which are connected in series, and the PLC automatic control module of the electric ball valve and the pressure relief valve sends a valve opening signal or a valve closing signal through the output end of the PLC control module to control the electric actuator of the electric ball.
Preferably, the PLC processor is a Siemens S7-200CPU226 module, the Ethernet communication module is a CP243 module, and the analog quantity expansion module is an EM235 module.
Preferably, the control system main power switch, the PLC control module switch and the equipment control module switch are connected to two ends of the UPS and the ac power supply.
The utility model discloses beneficial effect includes: the UPS power supply mode is used for realizing uninterrupted power supply to a system control loop; the power supply can be continuously supplied to the first-stage grid electric valve after the power failure, so that the first-stage grid electric valve is automatically closed; the normal operation of the communication module and the PLC control module is kept, and the uninterrupted monitoring and control of the unit operation parameters are achieved. 2. The one-level net water supply electric valve is automatically closed at the first time after the system is powered off, manpower is released, and the high-temperature gasification safety risk of the system is reduced. 4. The water replenishing pump is used for replenishing water to the system, and the system is subjected to under-pressure detection and pressure replenishment before the secondary network circulating pump is started in case of power failure, so that idling of the system is avoided. 5. The outdoor temperature acquisition system is added, firstly, the operation frequency of the secondary network circulating pump can be regulated and controlled in real time by acquiring and analyzing the outdoor temperature, and secondly, the temperature control valve can automatically and reasonably control the temperature according to the analysis of the PLC control system on the outdoor temperature in an intelligent temperature setting mode, so that the effects of reducing energy consumption and improving the utilization rate of a heat source are achieved under the simultaneous coordination action of the two aspects. 6. The system electric control equipment is added with a self-checking function, so that the unit fault can be found in time, and the safe and efficient operation of the equipment is guaranteed. 7. All motor pump bodies in the system are controlled by frequency converters to operate, so that energy consumption can be greatly reduced, and the service life of the motor is prolonged.
Drawings
Fig. 1 is a schematic structural view of a heating system of an intelligent control system of a heat exchange station in an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a PLC control module in an embodiment of the present invention;
fig. 3 is a schematic diagram of a control circuit of a circulating pump/water replenishing pump in an intelligent control system of a heat exchange station in an embodiment of the present invention;
fig. 4 is a schematic diagram of a circuit structure of a first part of a circulation pump/make-up pump in an apparatus operation module according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a circuit structure of a second part of a circulation pump/make-up pump in an apparatus operation module according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a circuit structure of a third part of a circulation pump/make-up pump in an apparatus operation module according to an embodiment of the present invention;
fig. 7 is a control circuit diagram of an electric ball valve/pressure relief valve in an apparatus operation module according to an embodiment of the present invention.
Detailed Description
In order to provide a cost of using manpower sparingly, energy-conservation subtracts the consumption, promotes heat transfer station intelligence control system of heat supply quality, it is right to combine the description attached drawing below the utility model discloses a preferred embodiment explains.
The embodiment of the utility model provides a heat exchange station intelligence control system, include: the system comprises a PLC control module, an equipment control module and heat exchange station field equipment; the PLC control module is in wireless communication with the upper computer 14, and the PLC control module and the equipment control module are sequentially connected with field equipment of the heat exchange station;
specifically, the PLC control module is mainly used for automatically controlling the field device, the device control module is mainly used for receiving an instruction of the PLC to control the field device, or directly and manually controlling the field device, for example, starting and stopping of a pump, opening and closing of a valve, and the like, the field device of the heat exchange station is all updated to an automatic device which is interconnected with the PLC and automatically controlled, for example, a manual valve is replaced by the electric ball valve 1.
Referring to fig. 1, the heat supply system mainly comprises a heat source, a heat supply network and a heat consumer 7, wherein the primary pipe network is a heat supply pipeline system from the heat source to the heat exchange station, and the secondary pipe network is a heat supply pipeline system from the heat station to the heat consumer 7. The field equipment of the heat exchange station comprises a primary water supply pipe network entering a heat exchanger 3, a secondary water return pipe network, a primary water return pipe network flowing out of the heat exchanger 3 and a secondary water supply pipe network, wherein the primary water supply pipe network is provided with an electric ball valve 1, the primary water return pipe network is provided with a temperature control valve 2, the secondary water supply pipe network is provided with a secondary water supply temperature sensor 4 and a secondary water supply pressure sensor 5, the secondary water return pipe network is provided with a secondary water return temperature sensor 12 and a secondary water return pressure sensor 11, a radiator of a user 7 flowing into the secondary water supply pipe network is connected into the secondary water return pipe network through a circulating pump 10, a water replenishing pump 9 and a pressure relief valve 8 are both arranged in the secondary water return pipe network, and the user 7 is provided with an outdoor;
the working principle of secondary heat exchange is as follows: in the second-stage heat exchange station, hot water of the first-stage heating power network is used for heating water in the second-stage network through the heat exchanger 3, circulating water of the first-stage heating power network after heat exchange returns to the first-stage website to be heated again, the water heated by the second-stage network heat exchange station is conveyed to a heat user 7 through the second-stage network to be radiated, and the water returns to the second-stage heat exchange station to be heated continuously after being radiated.
The temperature control valve 2 is additionally arranged on the primary network backwater to control the heat flow of the system in real time, and the temperature control valve 2 is used for controlling the water supply flow of the primary network, so that the reliable regulation of the water supply temperature of the secondary network is realized; the heat exchange is turned off or started between the primary network water supply and the heat exchanger 3 through the electric ball valve 1, when the power system is powered off, the heat source of the primary network is automatically cut off, the vaporization of the secondary network is prevented, and after the heat supply system is powered on, the electric ball valve 1 for supplying the primary network water is automatically opened on the premise of no fault in detection and operation. Circulating water of the secondary network is heated from the heat exchanger 3 and then flows to a user 7 through secondary network water supply, a secondary water supply temperature sensor 4 and a secondary water supply pressure sensor 5 are arranged on the secondary water supply network and are respectively used for feeding back the secondary network water supply temperature and the secondary water supply network pressure, an outdoor temperature sensor 6 is arranged at the position of the user 7 and is used for transmitting the outdoor real-time temperature of the position of the user 7 back to the PLC and the upper computer 14, the opening degree of the temperature control valve 2 is adjusted according to the collected outdoor real-time temperature so as to control the secondary network water supply temperature, the secondary network water supply is cooled by the user 7 and then returns to the heat exchanger 3 through a secondary water return network, a water replenishing pump 9 and a circulating pump 10 (a main circulating pump and a standby circulating pump) are arranged on the; and the circulating pump 10 is used for circulating water in the diode network, the circulating pump 10 is additionally provided with a frequency converter, the running frequency of the frequency converter is related to the collected outdoor real-time temperature, and the running frequency of the frequency converter is automatically adjusted through the collected outdoor real-time temperature, so that the frequency conversion running effect is achieved. The secondary network is also provided with a pressure relief valve 8 for pressure relief when the pressure of the secondary network is higher than a set threshold value.
A PLC control module: the temperature signal, the pressure signal, the valve signal and the pump signal collected in the heat exchange station field device are all connected with the input end of the PLC control module, the output end of the PLC control module is all connected with a relay coil for controlling the heat exchange station field device, wherein the temperature signal is a signal of a secondary water supply temperature sensor 4, a signal of a secondary water return temperature sensor 12 and a signal of an outdoor temperature sensor 6, and the pressure signal is a signal of a secondary water supply pressure sensor 5 and a signal of a secondary water return pressure sensor 11.
Specifically, referring to fig. 2, the PLC control module includes a PLC processor 13, an ethernet communication module 15, and an analog expansion module 16; the input end of the PLC processor 13 is connected with the pump signal and the valve signal, the analog input end of the analog expansion module 16 is connected with the temperature signal and the pressure signal, and the analog output end is connected with the frequency converter and the temperature control valve 2. The PLC processor 13 is a Siemens S7-200CPU226 module, the Ethernet communication module 15 is a CP243 module, and the analog quantity expansion module 16 is an EM235 module.
The input end of the PLC processor 13 is connected with: pump operation signals and pump fault signals of the circulating pump 10 and the water replenishing pump 9 respectively, and valve automatic control signals, valve opening signals, valve closing signals, valve opening to position signals and valve closing to position signals of the electric valve and the pressure release valve 8 respectively; each signal is connected with a signal indicator lamp in series;
specifically, the functions of each point at the left input end of the S7-200CPU226 chip are: i0.0 main circulation pump running signal, I0.1 circulation pump fault signal, I0.2 is equipped with circulation pump running signal, I0.3 is equipped with circulation pump fault signal, I0.4 water replenishing pump 9 running signal, I0.5 water replenishing pump 9 fault signal, I0.6 electric ball valve 1 automatic running signal, I0.7 electric ball valve 1 on signal, I1.0 electric ball valve 1 off signal, I1.1 relief valve 8 automatic running signal, I1.2 relief valve 8 on signal, I1.3 relief valve 8 off signal, I1.5 electric ball valve 1 on signal, I1.6 electric ball valve 1 off signal in place, I1.7 relief valve 8 on signal, I2.0 relief valve 8 off signal in place.
The water replenishing pump 9 and the circulating pump 10 are controlled by a frequency converter connected with the water replenishing pump, a pump circulating signal is provided by electrifying a running state relay which is arranged in the frequency converter and used for indicating the frequency converter, the running state relay is connected with a relay KA1 which is arranged in the PLC control module and used for transmitting a signal to the PLC processor 13, and after the relay KA1 acts, a normally open contact KA1 is sucked; the pump fault signal is provided by a fault relay which is arranged in the frequency converter and used for indicating the running fault of the frequency converter, the fault relay is connected with a relay KA2 which transmits signals to a CPU in the PLC control module, and after the relay KA2 acts, a normally open contact KA2 of the relay is sucked; the automatic valve operation signal, the valve opening signal, the valve closing signal and the valve opening/closing in-place signal are all the state signals of the valves, namely, the state signals of the electric valves (the electric ball valves 1/the pressure release valves 8) are transmitted to the coils of the corresponding relays in the PLC control module by the relays arranged in the actuator circuits of the electric valves and the corresponding relays in the PLC control module, so that the normally open contacts of the relays transmit the signals to the PLC processor 13.
The output end of the PLC processor 13 is connected with: and pump starting relay coils of the circulating pump 10 and the water replenishing pump 9, valve opening relay coils of the electric valve and the pressure release valve 8 and valve closing relay coils of the pressure release valve 8 are respectively connected, each relay coil is connected with a signal indicator lamp in series, and an auxiliary contact of each relay is connected into an equipment control module and used for controlling the state of field equipment of the heat exchange station.
Specifically, the functions of each point at the right output end of the S7-200CPU226 chip are: q0.0 main circulating pump 10 starts, and Q0.1 is equipped with circulating pump 10 and starts, and Q0.2 moisturizing pump 9 starts, and Q0.4 electric ball valve 1 is opened, and Q0.5 electric ball valve 1 is closed, and Q0.6 relief valve 8 is opened, and Q0.7 relief valve 8 is closed. The right side output end is connected with the relay coil corresponding to each point position function, and the auxiliary contact of each relay is used for being connected to a related circuit in the equipment control module to start the corresponding function to be used as a switch of the corresponding function circuit.
The device control module includes: the system comprises a PLC automatic control and remote manual control change-over switch of the heat exchange station field equipment, a PLC automatic control module and a remote manual control module of the heat exchange station field equipment.
Specifically, the equipment control module comprises a remote manual control module of a circulating pump 10 or a water replenishing pump 9 and a remote manual control module of an electric ball valve 1 or a pressure relief valve 8; the remote manual control module of the circulating pump 10 or the water replenishing pump 9 is connected with the thermal relay and the motor for controlling the thermal relay in sequence through controlling the first contactor of the remote manual control module; the PLC automatic control module of the circulating pump 10 or the water replenishing pump 9 gives a starting signal and a frequency signal of a frequency converter through the PLC automatic control module, and the frequency converter is sequentially connected with a second contactor for controlling the frequency converter, a thermal relay and a motor for controlling the frequency converter;
referring to fig. 3, the three-phase electrical connection switch QF1, the rear end of the switch QF1 includes two parallel branches, one branch is an automatic control branch, the frequency converter is connected with the contactor KM2, the other branch is a manual control branch, the contactor KM1, both branches are connected with the thermal relay protection unit of the main line, the thermal relay is connected with the motor of the pump (the circulating pump 10 and the water replenishing pump 9), specifically, referring to fig. 4, the fire wire end connection switch QF1 is sequentially connected with the rotary switch, the rotary switch is used for switching between the automatic control and the manual control of the pump, the automatic control branch is a coil of the contactor KM2 connected in series with the normally closed contact of the contactor KM1, the manual control branch is a tripping button SB1, a tripping button SB2, a normally closed contact of the contactor KM2 and a coil of the contactor KM1 connected in series, wherein, the tripping button SB2 is connected in parallel with the normally open contact of the contactor KM1, the back of the two branches is connected with a thermal relay on the main line.
Referring to fig. 5, a normally open contact of the relay KA16 is connected between a starting terminal and a common end of the frequency converter, KA16 is controlled by the PLC control module, and when the pump needs to be started, a high level is output to electrify a coil of the relay KA16, so that the normally closed contact of the relay KA16 is closed, and the frequency converter is started.
Referring to fig. 6, the frequency setting of the frequency converter is provided through the output end of the analog quantity expansion module 16, and the analog quantity output end outputs a standard signal of 4-20mA to determine the output frequency of the final frequency converter.
Referring to fig. 4, when the rotary switch is turned to the automatic control end, the coil of the contactor KM2 is grounded, the automatic control branch is conducted, and the normally closed contact of the contactor KM2 on the manual control branch is opened; when the rotary switch turns to one end of the manual control, the jog close button SB2 is pressed, the motor of the pump is started by SB2, after SB2 is closed, the branch is connected, after the coil of the contactor KM1 is electrified, the normally open contact of the contactor KM1 is closed, the self-locking of the manual control branch is formed, when the motor of the pump needs to be closed, the jog open button SB1 is pressed, the manual control branch is disconnected, and the motor of the pump is powered off.
The remote manual control module of the electric ball valve 1 or the pressure release valve 8 is connected with the electric actuator of the electric ball valve 1 or the pressure release valve 8 through the series-connected start button, the start-stop button and the third relay for controlling the start-stop button, the series-connected close button, the close-stop button and the fourth relay for controlling the close-stop button are connected with the electric actuator of the electric ball valve 1 or the pressure release valve 8, the PLC automatic control modules of the electric ball valve 1 and the pressure release valve 8 send valve open signals or valve close signals through the output end of the PLC control module, and the electric actuator of the electric ball valve 1 or the pressure release valve 8 connected with the PLC automatic control module is controlled.
Referring to fig. 7, the whole circuit for controlling the electric ball valve 1 belongs to an equipment control module, the electric ball valve 1 is controlled by a valve opening branch and a valve closing branch respectively, a main switch QF2 of the valve opening branch is also divided into two branches which are respectively a PLC automatic control branch and a manual control branch, the PLC automatic control branch is a normally open contact of a relay KA20, after the PLC sends out an instruction, a corresponding pin high level triggers the relay KA20, and a normally open contact of a relay KA20 of the PLC automatic control branch is closed to control the opening of the electric ball valve 1; the manual control branch is a point-operated opening button SB3 and a point-operated closing button SB4, the electric ball valve 1 is opened to the position signal and the coil of the relay 1KA1 are connected in series, the electric ball valve 1 is opened to the position signal and is the normally closed contact of the relay which is arranged in the actuator circuit of the electric ball valve 1 and used for indicating the electric ball valve 1 to be opened to the position, wherein the two ends of the normally open contact of the relay 1KA1 are connected with the point-operated closing button SB4 in parallel to form a self-holding circuit. When the inching close button SB4 is pressed, the circuit is switched on, the coil of the relay 1KA1 is electrified, the normally open contact of the relay 1KA1 is closed to form a self-holding state, and after the relay which is opened in place in the electric ball valve 1 is electrified, the normally closed contact of the relay which is opened in place in the circuit is disconnected, so that the electric ball valve 1 is not over opened, or the inching open button SB3 is manually pressed to disconnect the circuit, and the electric ball valve 1 is stopped from continuing to open.
Similarly, a valve closing branch of the electric ball valve 1 is controlled, a main switch is QF3, the valve closing branch is also divided into two branches which are respectively a PLC automatic control branch and a manual control branch, the PLC automatic control branch is a normally open contact of a relay KA21, after the PLC sends an instruction, a corresponding pin high level triggers the relay KA21, the normally open contact of the relay KA21 of the PLC automatic control branch is closed, and the electric ball valve 1 is controlled to be closed; the manual control branch circuit is a point-operated opening button SB5 and a point-operated closing button SB6, the electric ball valve 1 closing in-place signal and the coil of the relay 1KA2 are connected in series, the electric ball valve 1 closing in-place signal is a normally closed contact of the relay which is arranged in the actuator circuit of the electric ball valve 1 and used for indicating the electric ball valve 1 to be opened in place, wherein two ends of the normally open contact of the relay 1KA2 are connected with the point-operated closing button SB6 in parallel, and a self-holding circuit is formed. The working mode is the same as that of the valve opening branch, and is not described in detail herein.
The control system main power switch, the PLC control module switch and the equipment control module switch are connected to two ends of the UPS and the AC power supply.
The embodiment of the utility model provides an in, PLC control module, sensor, equipment actuating mechanism and the communication module at all heat transfer stations have constituteed heat transfer station automatic control system, through PLC control and electrical control cabinet's combination, realize the automatic control of total powerstation, realize safely opening and stop, reach unmanned on duty.
When the main power supply is in a normal operation state, the system is powered by the main power supply, each device is in normal operation, each operation parameter and state of the system collected by the PLC control module are displayed on the screen of the upper computer 14 in real time, the operation frequency of the second-level network circulating pump 10 changes along with the change of outdoor temperature, the water supply temperature regulation value of the second-level network is stably attached to the set value of the system, the water replenishing system monitors and regulates the pressure in real time, and the UPS commercial power runs and is in a charging mode.
When the main power supply is suddenly powered off, the power supply system is instantly switched to the UPS power supply mode, the control loop of the equipment realizes the normal work of uninterrupted power supply, the main driving circuit of the equipment is powered off, and meanwhile, the primary network water supply electric ball valve 1 starts to be automatically closed until being completely closed, the communication is normal, and all parameters are normally displayed.
After the main power supply is powered on, a main driving circuit of the equipment is powered on, and the UPS is automatically switched to the commercial power operation and charges; the system carries out comprehensive self-checking, and in the self-checking process, if second grade net water supply pressure is less than when setting for the pressure threshold value, the moisturizing pump 9 carries out pressure compensation to the second grade net, starts second grade net circulating pump 10 when pressure compensation finishes, and to circulating pump 10 normal operating, treat that each equipment operation is normal after, first grade net water supply electric ball valve 1 begins to open, treat that all equipment operation back, the system is last comprehensive self-checking, and the equipment resumes normal heat supply regulation and control completely after accomplishing.
Specifically, the circulating pump 10 and the water replenishing pump 9 are controlled intelligently by a frequency converter speed regulation technology and a PLC, and the measurement of analog quantity (temperature, pressure) and state quantity (pump state, valve switching state and the like) on site in the heat exchange station is mainly completed, and the measurement is compared with the set upper and lower limit threshold values to calculate, obtain an execution result and output the execution result to the execution mechanism to execute corresponding operation. The temperature comparison is written into a program in a mode of a pre-strategy, and is realized by adopting a temperature capture pool, wherein the temperature capture pool is used for automatically selecting a certain number as a system set value and automatically setting the system set value when a plurality of values are selected according to the past heating experience and the outdoor temperature reaches a certain interval. For example, the setting of the secondary outlet temperature depends on the temperature returned by the outdoor temperature sensor 6 of the current user 7, the secondary outlet temperature is determined, after the system is filled with the value, the primary network water supply temperature is adjusted through the temperature control valve 2 of the primary network, the actual water supply temperature of the secondary network is continuously fed back, the set temperature of the temperature control valve 2 is adjusted, and the opening of the valve is adjusted by the temperature control valve 2, so that the primary network water supply temperature is gradually reduced or increased.
The rotational frequency of circulating pump 10 passes through the converter and realizes, if the second grade water supply temperature who gathers is higher than the secondary outlet temperature who sets for, explain not so much heat, can reduce the flow of circulating water, then can reduce the frequency of circulating pump 10, save electric power, the frequency of converter also snatchs the pond through the frequency and realizes, when the secondary water supply temperature who gathers is higher than secondary outlet temperature N degree promptly, then how much frequency is reduced and the reduction of flow is realized, reach the purpose that reduces user 7 side secondary water supply temperature.
When power system has a power failure, the normal operating of a plurality of heat exchange stations is influenced, the electric ball valve 1 of the primary network needs to be closed in time, otherwise, the secondary network can be vaporized, the UPS is arranged for supplying power, each device can be maintained to operate for about 2 hours, and the time for shutting off the electric ball valve 1 of the primary network can be met.
The circulation pump 10 is provided with a standby circulation pump to ensure the normal operation of the system.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. A heat exchange station intelligent control system, characterized by comprising: the system comprises a PLC control module, an equipment control module and heat exchange station field equipment; the PLC control module is in wireless communication with the upper computer, and the PLC control module and the equipment control module are sequentially connected with field equipment of the heat exchange station;
the heat exchange station field equipment comprises a primary water supply pipe network entering the heat exchanger, a secondary water return pipe network, a primary water return pipe network flowing out of the heat exchanger, and a secondary water supply pipe network, wherein the primary water supply pipe network is provided with an electric ball valve, the primary water return pipe network is provided with a temperature control valve, the secondary water supply pipe network is provided with a secondary water supply temperature sensor and a secondary water supply pressure sensor, the secondary water return pipe network is provided with a secondary water return temperature sensor and a secondary water return pressure sensor, the secondary water supply pipe network flows into a user radiator and then is connected into the secondary water return pipe network through a circulating pump, the water replenishing pump and a pressure relief valve are both arranged in the secondary water return pipe network, and an;
the temperature signal, the pressure signal, the valve signal and the pump signal collected in the heat exchange station field equipment are all connected with the input end of a PLC control module, and the output end of the PLC control module is all connected with a relay coil for controlling the heat exchange station field equipment, wherein the temperature signal is a secondary water supply temperature sensor signal, a secondary water return temperature sensor signal and an outdoor temperature sensor signal, and the pressure signal is a secondary water supply pressure sensor signal and a secondary water return pressure sensor signal;
the equipment control module comprises a PLC automatic control and remote manual control change-over switch of the heat exchange station field equipment, a PLC automatic control module and a remote manual control module of the heat exchange station field equipment.
2. The intelligent control system of a heat exchange station of claim 1, wherein the PLC control module comprises a PLC processor, an ethernet communication module, and an analog expansion module; the input end of the PLC processor is connected with the pump signal and the valve signal, the analog input end of the analog quantity expansion module is connected with the temperature signal and the pressure signal, and the analog output end of the analog quantity expansion module is connected with the frequency converter and the temperature control valve.
3. The intelligent control system of a heat exchange station of claim 1, wherein the input of the PLC processor is connected to: the system comprises a circulating pump, a water replenishing pump, an electric valve, a pressure release valve, a valve opening position signal, a valve closing position signal, a valve opening position signal and a valve closing position signal, wherein the circulating pump and the water replenishing pump respectively have a pump operation signal and a pump fault signal; each signal is connected with a signal indicator lamp in series;
the output end of the PLC processor is connected with: the system comprises a circulating pump, a water replenishing pump, a pressure release valve, an auxiliary contact access device control module and a heat exchange station field device, wherein the circulating pump and the water replenishing pump respectively have a pump starting relay coil, an electric valve and a pressure release valve respectively have a valve opening relay coil and a valve closing relay coil, each relay coil is connected with a signal indicator lamp in series, and the auxiliary contact access device control module of each relay is used for controlling the state of the heat exchange.
4. The intelligent control system of a heat exchange station of claim 1, wherein the equipment control modules comprise a remote manual control module of a circulating pump or a make-up pump and a remote manual control module of an electric ball valve or a pressure relief valve; the remote manual control module of the circulating pump or the water replenishing pump is connected with the thermal relay and the motor for controlling the thermal relay in sequence by controlling the first contactor of the remote manual control module; the PLC automatic control module of the circulating pump or the water replenishing pump gives a starting signal and a frequency signal of the frequency converter through the PLC control module, and the frequency converter is sequentially connected with a second contactor for controlling the frequency converter, a thermal relay and a motor for controlling the frequency converter;
the remote manual control module of the electric ball valve or the pressure relief valve is connected with an electric actuator of the electric ball valve or the pressure relief valve through an opening key, an opening stop key and a third relay for controlling the electric ball valve or the pressure relief valve which are connected in series, and is connected with the electric actuator of the electric ball valve or the pressure relief valve through a closing key, a closing stop key and a fourth relay for controlling the electric ball valve or the pressure relief valve which are connected in series, and the PLC automatic control module of the electric ball valve and the pressure relief valve sends a valve opening signal or a valve closing signal through the output end of the PLC control module to control the electric actuator of the electric ball.
5. A heat exchange station intelligent control system as claimed in claim 2, wherein the PLC processor is a siemens S7-200CPU226 module, the ethernet communication module is a CP243 module, and the analog quantity expansion module is an EM235 module.
6. A heat exchange station intelligent control system as claimed in claim 1, wherein the control system main power switch, the PLC control module switch and the equipment control module switch are connected across the UPS and the ac power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021729071.2U CN212565996U (en) | 2020-08-18 | 2020-08-18 | Intelligent control system of heat exchange station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021729071.2U CN212565996U (en) | 2020-08-18 | 2020-08-18 | Intelligent control system of heat exchange station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212565996U true CN212565996U (en) | 2021-02-19 |
Family
ID=74626619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021729071.2U Active CN212565996U (en) | 2020-08-18 | 2020-08-18 | Intelligent control system of heat exchange station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212565996U (en) |
-
2020
- 2020-08-18 CN CN202021729071.2U patent/CN212565996U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103438503A (en) | Unattended intelligent control method and control system for heat exchange station | |
| CN104654449A (en) | Distributed electric heat energy storage heating control system and method | |
| CN203405698U (en) | Fixed winch type hoist intelligent control system | |
| CN110970998A (en) | Energy management system of multi-energy complementary smart energy based on source network charge storage | |
| CN104283222A (en) | Regional power grid reactive voltage control system | |
| CN103163846B (en) | Method and device of automatic control of heating and ventilation of transformer substation | |
| CN112113268A (en) | Intelligent control system of heat exchange station | |
| CN212565996U (en) | Intelligent control system of heat exchange station | |
| CN202383493U (en) | Automatic control device for heating and ventilation of transformer substation | |
| CN201463116U (en) | Thermal control system device | |
| CN103580062B (en) | Grid-connection control system for combined supply system | |
| CN114151842A (en) | Automatic control system for water heat source centralized heat supply and heat exchange station | |
| CN206164432U (en) | Domestic multipotency source is synthesized complementation and is utilized system | |
| CN214307322U (en) | Heat exchange station field device control device | |
| CN205051354U (en) | Ventilation air methane power generation system convenient to adjust power factor | |
| CN205536389U (en) | But unmanned on duty's cold and hot source of peak regulation air conditioner modular system | |
| CN115016416A (en) | Clean energy-based zero-carbon factory control system and method | |
| CN113587203A (en) | Multi-module combined control solar-heat pump composite heat collection system based on PLC | |
| CN210267499U (en) | Intelligent heat exchange station control system | |
| CN113834194A (en) | Comprehensive energy-saving control system for ventilation air conditioner of subway station | |
| CN113154518A (en) | Intelligent heat supply control system based on residential electricity load scheduling | |
| CN205141679U (en) | Comprehensive energy power supply system | |
| CN216280599U (en) | Intelligent on-line oil purification switching device of hydroelectric generating set | |
| CN205334275U (en) | Mutual device of electric power demand side equipment intelligence | |
| CN210980008U (en) | Energy storage type air source heat pump heating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |