CN210958218U - Intelligent frequency conversion regulation and control cabinet - Google Patents
Intelligent frequency conversion regulation and control cabinet Download PDFInfo
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- CN210958218U CN210958218U CN201922027477.XU CN201922027477U CN210958218U CN 210958218 U CN210958218 U CN 210958218U CN 201922027477 U CN201922027477 U CN 201922027477U CN 210958218 U CN210958218 U CN 210958218U
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Abstract
Intelligent frequency conversion regulation and control cabinet. Relates to the technical field of intelligent control. The upper part in the cabinet body is provided with a communication unit and an intelligent unit, the lower part is provided with a wiring terminal area, the middle part of the cabinet body is provided with a frequency conversion unit, a power supply unit and a monitoring unit, the lower part is provided with an execution unit and a protection unit, and the outside of the cabinet body is respectively connected with the intelligent unit, a detector and a pump; a load isolating switch, a button, a signal lamp and a man-machine interaction unit are arranged on a cabinet door of the cabinet body. The utility model discloses following beneficial effect has: the controlled equipment is monitored and protected in all directions through various sensors such as temperature, vibration displacement, voltage, current and the like; the intelligent variable-frequency regulating and controlling cabinet can monitor the operation condition change trend of the equipment in real time, diagnose the occurrence position of the fault of the monitored equipment and the severity of the fault, realize the prediction of the equipment fault, eliminate the fault in the bud, and simultaneously carry out various protections, early warning, alarming and the like on the detected equipment, thereby ensuring the safe and stable operation of the equipment in a full cycle.
Description
The technical field is as follows:
the utility model belongs to the technical field of the intelligent control technique and specifically relates to intelligence frequency conversion regulation and control cabinet.
Background art:
along with the rapid development of modern enterprises, people pay more attention to intelligent safety and sustainable production, so the requirements on energy conservation, control and prediction maintenance work of mechanical equipment are higher and higher, and the monitoring of the running state of equipment such as motors, fans, pumps and the like can help the enterprises to reduce unplanned shutdown to the greatest extent and ensure the safe and stable full-period and good-quality running of the equipment.
The utility model has the following contents:
in order to solve the problem, the utility model provides an intelligence frequency conversion regulation and control cabinet.
The technical scheme of the utility model is that: the intelligent variable-frequency regulation and control cabinet comprises a cabinet body, wherein a communication unit and an intelligent unit are arranged at the upper part in the cabinet body, a wiring terminal area is arranged at the lower part of the cabinet body, and an input/output wiring terminal is arranged in the wiring terminal area; the intelligent monitoring device comprises a cabinet body, a power supply unit, a monitoring unit, an execution unit, a protection unit, an intelligent unit, a monitor and a pump, wherein the middle part of the cabinet body is provided with the frequency conversion unit, the power supply unit and the monitoring unit;
a load isolating switch, a button, a signal lamp and a human-computer interaction unit are arranged on a cabinet door of the cabinet body;
the pump is connected with the frequency conversion unit through a wiring terminal, the frequency conversion unit, the protection unit, the monitoring unit, the communication unit and the execution unit are connected with the intelligent unit, the power supply unit is connected with all other units in the cabinet, the sensing unit is connected with the intelligent unit through the wiring terminal, the monitor is connected with the monitoring unit through the wiring terminal, the communication unit is connected with the human-computer interaction unit, the load isolating switch is connected with the power supply unit, and the button and the signal lamp are connected with the execution unit;
the human-computer interaction unit comprises a display device;
the communication unit comprises a remote monitoring terminal and a 4G wireless communication card;
the intelligent unit comprises an MIX controller;
the power supply unit comprises a transformer, a filter, a lightning protector, an AC/AD converter, a power indicator and a socket;
the protection unit comprises a fast fuse, a comprehensive protector and a leakage switch;
the execution unit comprises a relay group, a breaker group and a contact group;
the frequency conversion unit comprises a frequency conversion speed regulator, a circuit breaker group and a contact group which are connected with the frequency conversion speed regulator in parallel;
the sensing unit comprises a flowmeter, a pressure transmitter, a temperature clothing sensor and a liquid level sensor which are positioned on the controlled equipment;
the monitoring unit comprises a vibration sensor, a voltage sensor and a current sensor which are positioned on the controlled equipment.
The utility model discloses following beneficial effect has: the controlled equipment is monitored and protected in all directions through various sensors such as temperature, vibration displacement, voltage, current and the like; the intelligent variable frequency regulation and control cabinet can monitor the operation condition change trend of the equipment in real time, diagnose the occurrence part of the fault of the monitored equipment and the severity of the fault, realize the prediction of the equipment fault, eliminate the fault in the bud, and simultaneously carry out various protections, early warning, alarming and the like on the detected equipment; the intelligent frequency conversion regulation and control cabinet integrates computer technology, control technology, communication technology and display technology; the regulation and control cabinet supports a DCS/PLC hard wiring mode, an RS485 communication mode and wired/wireless communication, and is convenient for a user to perform centralized control and management and monitor the state of equipment at different places; the system can help enterprises to reduce unplanned shutdown to the maximum extent, ensure the safe and stable full-period excellent operation of equipment, and also can help enterprises to subjectively arrange maintenance plans and prepare before maintenance.
Description of the drawings:
FIG. 1 is a schematic view of the arrangement structure in the cabinet body of the utility model;
FIG. 2 is a schematic view of the arrangement structure of the cabinet door of the present invention;
FIG. 3 is a first electrical schematic diagram of the present invention;
FIG. 4 is a second electrical schematic diagram of the present invention;
FIG. 5 is a third electrical schematic diagram of the present invention;
fig. 6 is a block diagram of the data transmission and structure of the present invention.
In the figure, 1-cabinet body, 2-intelligent unit, 3-communication unit, 4-man-machine interaction unit, 5-terminal area, 51-terminal, 6-execution unit, 7-protection unit, 8-monitoring unit, 81-monitor, 9-sensing unit, 10-frequency conversion unit, 11-power supply unit, 12-pump, 13-load isolation switch, 14-button and signal lamp, and 15-cabinet door.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1 and fig. 2 to 5, the intelligent variable frequency regulation and control cabinet comprises a cabinet body 1, wherein a communication unit 3 and an intelligent unit 2 are arranged at the upper part in the cabinet body 1, a wiring terminal area 5 is arranged at the lower part of the cabinet body 1, and an input/output wiring terminal 51 is arranged in the wiring terminal area 5; the middle part of the cabinet body 1 is provided with a frequency conversion unit 10, a power supply unit 11 and a monitoring unit 8, an execution unit 6 and a protection unit 7 are arranged below the frequency conversion unit 10, the power supply unit 11 and the monitoring unit 8, and the outside of the cabinet body 1 is respectively connected with the intelligent unit 2, the monitor 81 and the pump 12 through a wiring terminal 51;
a load isolating switch 13, a button and signal lamp 14 and a man-machine interaction unit 4 are arranged on a cabinet door 15 of the cabinet body 1;
the pump 12 is connected with the frequency conversion unit 10 through a wiring terminal 51, the frequency conversion unit 10, the protection unit 7, the monitoring unit 8, the communication unit 3 and the execution unit 6 are connected with the intelligent unit 2, the power supply unit 11 is connected with all other units in the cabinet, the sensing unit 9 is connected with the intelligent unit 2 through the wiring terminal 51, the monitor 81 is connected with the monitoring unit 8 through the wiring terminal 51, the communication unit 3 is connected with the human-computer interaction unit 4, the load isolating switch 13 is connected with the power supply unit 11, and the button and signal lamp 14 are connected with the execution unit 6;
the human-computer interaction unit 4 comprises a display device;
the communication unit 3 comprises a remote monitoring terminal and a 4G wireless communication card;
the intelligent unit 2 comprises an MIX controller;
the power supply unit 11 comprises a transformer, a filter, a lightning protector, an AC/AD converter, a power indicator and a socket;
the protection unit 7 comprises a fast fuse, a comprehensive protector and a leakage switch;
the execution unit 6 comprises a relay group, a circuit breaker group and a contact group;
the frequency conversion unit 10 comprises a frequency conversion speed regulator, a circuit breaker group and a contact group which are connected with the frequency conversion speed regulator in parallel;
the sensing unit 9 comprises a flowmeter, a pressure transmitter, a temperature sensor and a liquid level sensor which are positioned on controlled equipment;
the monitoring unit 8 comprises a vibration sensor, a voltage sensor and a current sensor which are positioned on the controlled equipment.
The intelligent frequency conversion regulation and Control cabinet combines Computer technology (Computer), Control technology (Control), Communication technology (Communication) and display technology (CRT) into a whole, supports DCS/PLC hard wiring mode, RS485 Communication mode and wired/wireless Communication, and is convenient for users to perform centralized Control and management.
The intelligent frequency conversion regulation and control cabinet can automatically acquire data of vibration, bearing temperature, running current, voltage and the like of each motor to carry out accurate measurement. The motor is comprehensively protected from stalling, short circuit, electric leakage, phase failure, overtime starting, overload, underload, overvoltage, undervoltage, grounding and the like, open-loop or closed-loop (flow, pressure, temperature and liquid level) control can be carried out on the equipment, meanwhile, data can be transmitted to a data terminal through a wireless network, and the running state of the field equipment can be remotely monitored at any time and any place as long as the place with the wireless network is available.
The intelligent variable-frequency regulating and controlling cabinet can be widely applied to industries such as electric power, petrochemical industry, metallurgy, water/sewage, environmental protection, mines and the like, and can monitor and protect key equipment such as motors, fans, pumps and the like in real time.
The intelligent frequency conversion regulation and control cabinet mainly comprises three big units and six small units, and the difference is: the intelligent monitoring system comprises an intelligent monitoring unit, a communication unit, a human-computer interaction unit, a power supply unit, a frequency conversion unit, a sensing unit, a monitoring unit, a protection unit, an execution unit and the like.
Data acquisition and transmission mode
The intelligent frequency conversion regulation and control cabinet is internally provided with an intelligent monitor which can complete the acquisition, the quantity value conversion, the logic control, the filtering processing and the like of analog signals, the storage period and the reporting period of data can be adjusted according to the requirements of user environments, the multi-point networking mode is very flexible, and a high-efficiency real-time network transmission mode is selected.
The units of the intelligent frequency conversion regulation and control cabinet are independent and mutually associated, the data acquisition and transmission processes are interdependent and mutually cooperated, and a data transmission and structural block diagram is shown in fig. 6.
Control type of intelligent frequency conversion regulation and control cabinet
1. Flow control: the instantaneous flow signal of the outlet of the pump is collected through the flow transmitter, and the rotating speed of the pump is automatically adjusted according to the change of the instantaneous flow so as to ensure the constant flow of the outlet of the pump;
2. and (3) pressure control: collecting the pressure of a pipe network through a pressure sensor, and automatically adjusting the rotating speed of a pump according to the change of the pressure of the pipe network so as to control the pressure of the pipe network to be constant;
3. temperature control: acquiring a temperature signal of a controlled object through a temperature sensor, and automatically adjusting the rotating speed of a pump according to a set temperature range so as to control the temperature within a controllable range;
4. liquid level control: the liquid level sensor is used for collecting a liquid level signal of a controlled object, and the rotating speed of the water supply and drainage pump is automatically controlled according to the high and low changes of the liquid level, so that the liquid level is controlled within an allowable range.
The performance and the characteristics are as follows: the operation is safe, stable and reliable, the failure rate is low, and the average failure-free working time of the whole machine exceeds 8000 hours; the application occasions are wide (electric power, petrochemical industry, metallurgy, water/sewage, environmental protection, mines and the like), and the installation and the operation are convenient and quick; the control function is strong (temperature, pressure, flow, liquid level, etc.); energy is saved, and compared with the traditional control motor, the motor controlled by the frequency converter can save electricity by 10-50%; the operation cost is reduced: through frequency conversion control can reduce production running cost reduction widely to the impact to equipment after the frequency conversion starts is few, and maintenance volume also follow the reduction, prolongs the life of equipment: the frequency converter starts the equipment from 0HZ, so that the impact on the equipment parts during starting is reduced; the interlocking protection, control, measurement, man-machine interaction and network communication functions are integrated.
The intelligent regulation and control cabinet implements continuous monitoring and real-time protection on three-phase current, power supply voltage, leakage current, PTC resistance value of the thermistor, analog input quantity and a starting process. The protection functions are independent of each other, multiple protection functions are allowed to be triggered simultaneously, and a tripping instruction is sent out by the protection function which firstly achieves a tripping condition. Various protection functions can be set and adjusted through the human-computer interaction unit according to actual conditions, all protection parameters are provided by a user or default when leaving a factory, and more than 10 perfect comprehensive protection functions from traditional protection are met.
And (4) temperature protection, wherein the motor thermal fault is defined when the resistance value sent by the PTC thermistor detector embedded or externally added in the motor stator or the bearing is greater than the thermistor setting value.
The vibration protection is that when the motor load is unbalanced or runs for a long time, the bearing is damaged to cause the vibration amplitude to be gradually increased, so the working state of the motor can be effectively evaluated by the vibration test of the motor, the vibration sensor converts the vibration parameters of the tested vibration body into appropriate electrical parameters, and the vibration sensor widely adopted at present is an acceleration sensor.
Locked-rotor protection, the occurrence of severe operating blockage of motor driving equipment or overload operation of a motor is defined as locked-rotor fault. And starting the locked-rotor protection function (Ia/Ie >4& Ib/Ie >4& Ic/Ie >4) when the ratio of the three-phase current to the rated current reaches or exceeds the locked-rotor setting coefficient (4-8 times).
And (4) phase failure protection, namely defining the unbalanced fault when the current ratio ((Imax-Imin)/Imax) of any two phases in the three-phase current is greater than the unbalanced setting coefficient.
Overload protection, wherein overload fault is defined when the ratio (Imax/Ie) of any phase current of the motor to rated current is more than 1.2, the device executes inverse time limit overload protection (according with IEC255-3 standard) to provide a plurality of overload protection characteristic curves, and a user can select a corresponding protection curve according to actual conditions.
And (4) grounding protection, wherein if the ratio of any phase current of the motor to the rated current is greater than the grounding setting coefficient, the grounding fault is defined.
And short-circuit protection, wherein short-circuit faults are defined when the ratio of at least two-phase current to rated current is greater than the short-circuit setting current coefficient.
And (4) leakage protection, wherein when the leakage current of the motor is larger than the leakage current setting value, the leakage fault is defined.
And under-load protection, wherein the under-load fault is defined when the ratio (Imax/Ie) of the maximum line current of the motor to the rated current is smaller than the setting coefficient of the under-load protection.
And (4) overvoltage protection, wherein the minimum line voltage of the motor is greater than the overvoltage setting value [ (Umin/Ue) -1] and then an overvoltage fault is defined.
And (4) under-voltage protection, wherein the maximum line voltage of the motor is smaller than an under-voltage setting value [1-Umax/Ue ], and an under-voltage fault is defined.
Starting the overtime protection, the device can detect the starting time, and when the ratio of the three-phase current to the rated current is still larger than 1.2(Ia/Ie is larger than 1.2 and Ib/Ie is larger than 1.2 and Ic/Ie is larger than 1.2) after the starting time is over, the starting overtime fault is defined.
External fault protection, when the motor operates and the device detects an external fault signal, the external fault protection is executed after time delay; when the motor is in a parking state, the device detects an external fault signal, and the motor is not allowed to be started.
The device has a measuring function, performs alternating current sampling on three-phase current, and adopts a current frequency tracking technology and a self-calibration technology. The current measurement is accurate and rapid, the measurement precision is 1 level, and the signal frequency range is 0-50 Hz.
The device supports an RS-485 network communication function and a DCS/PLC hard wiring mode (4-20 mA analog quantity output and alarm/protection signal output); and the user can conveniently perform centralized control on the MCC.
And (4) acquiring, processing, storing and displaying data of motor monitoring parameters.
And monitoring parameters of the motor such as temperature, vibration, current, voltage and the like in real time.
And (4) a data storage function, wherein the storage time is more than or equal to 10 years (every 10 seconds).
And displaying and archiving the trend graph of the real-time and historical data.
The method has the function of monitoring data and forming a report.
And alarming for out-of-limit monitoring parameters of the motor.
And setting the limit values of various alarm parameters of the motor.
Historical data queries may be performed on the data monitored by each motor.
The motor can be started and stopped remotely according to the requirements of users.
The system has the function of acquiring data from other systems and providing data to other systems on the interface.
The working state of the motor is monitored in real time for 24 hours.
A human-computer interaction interface is provided.
The intelligent variable-frequency regulation and control cabinet has the innovation point that the controlled equipment is monitored and protected in all directions through various sensors such as temperature, vibration displacement, voltage, current and the like; the intelligent variable frequency regulation and control cabinet can monitor the operation condition change trend of the equipment in real time, diagnose the occurrence part of the fault of the monitored equipment and the severity of the fault, realize the prediction of the equipment fault, eliminate the fault in the bud, and simultaneously carry out various protections, early warning, alarming and the like on the detected equipment; the intelligent frequency conversion regulation and control cabinet integrates computer technology, control technology, communication technology and display technology; the regulation and control cabinet supports a DCS/PLC hard wiring mode, an RS485 communication mode and wired/wireless communication, and is convenient for a user to perform centralized control and management and monitor the state of equipment at different places; the system can help enterprises to reduce unplanned shutdown to the maximum extent, ensure the safe and stable full-period excellent operation of equipment, and also can help enterprises to subjectively arrange maintenance plans and prepare before maintenance.
Claims (1)
1. The utility model provides an intelligence frequency conversion regulation and control cabinet, includes the cabinet body (1), its characterized in that: the upper part in the cabinet body (1) is provided with a communication unit (3) and an intelligent unit (2), the lower part of the cabinet body (1) is provided with a wiring terminal area (5), and an input/output wiring terminal (51) is arranged in the wiring terminal area (5); the intelligent cabinet is characterized in that a frequency conversion unit (10), a power supply unit (11) and a monitoring unit (8) are arranged in the middle of the cabinet body (1), an execution unit (6) and a protection unit (7) are arranged below the frequency conversion unit (10), the power supply unit (11) and the monitoring unit (8), and the outside of the cabinet body (1) is respectively connected with the intelligent unit (2), the monitor (81) and the pump (12) through a wiring terminal (51);
a load isolating switch (13), a button, a signal lamp (14) and a man-machine interaction unit (4) are arranged on a cabinet door (15) of the cabinet body (1);
the machine pump (12) is connected with the frequency conversion unit (10) through a wiring terminal (51), the frequency conversion unit (10), the protection unit (7), the monitoring unit (8), the communication unit (3) and the execution unit (6) are connected with the intelligent unit (2), the power supply unit (11) is connected with all other units in the cabinet, the sensing unit (9) is connected with the intelligent unit (2) through the wiring terminal (51), the monitor (81) is connected with the monitoring unit (8) through the wiring terminal (51), the communication unit (3) is connected with the human-computer interaction unit (4), the load isolating switch (13) is connected with the power supply unit (11), and the button and the signal lamp (14) are connected with the execution unit (6);
the human-computer interaction unit (4) comprises a display device;
the communication unit (3) comprises a remote monitoring terminal and a 4G wireless communication card;
the intelligent unit (2) comprises an MIX controller;
the power supply unit (11) comprises a transformer, a filter, a lightning protector, an AC/AD converter, a power supply indicator and a socket;
the protection unit (7) comprises a quick fuse, a comprehensive protector and a leakage switch;
the execution unit (6) comprises a relay group, a circuit breaker group and a contact group;
the frequency conversion unit (10) comprises a frequency conversion speed regulator, a circuit breaker group and a contact group which are connected with the frequency conversion speed regulator in parallel;
the sensing unit (9) comprises a flowmeter, a pressure transmitter, a temperature sensor and a liquid level sensor which are positioned on the controlled equipment;
the monitoring unit (8) comprises a vibration sensor, a voltage sensor and a current sensor which are positioned on the controlled equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922027477.XU CN210958218U (en) | 2019-11-22 | 2019-11-22 | Intelligent frequency conversion regulation and control cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922027477.XU CN210958218U (en) | 2019-11-22 | 2019-11-22 | Intelligent frequency conversion regulation and control cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210958218U true CN210958218U (en) | 2020-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922027477.XU Active CN210958218U (en) | 2019-11-22 | 2019-11-22 | Intelligent frequency conversion regulation and control cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210958218U (en) |
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2019
- 2019-11-22 CN CN201922027477.XU patent/CN210958218U/en active Active
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