CN216248834U - Mining isolator divides disconnected inspection control system based on torque limit - Google Patents
Mining isolator divides disconnected inspection control system based on torque limit Download PDFInfo
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Abstract
The utility model provides a mining disconnecting switch breaking inspection control system based on torque limitation, and relates to the technical field of mine electrical inspection. The system comprises a DSP, a power supply unit, a torque sensor, a signal processing unit, a position sensor, a driving mechanism control unit, an electric signal testing unit, a communication unit, an operation panel and a PLC. The DSP realizes torque data acquisition, operation and processing, the power supply unit provides a power supply for the system, the torque sensor and the position sensor respectively test the breaking inspection torque and position data of the mining isolating switch, the signal processing unit realizes the processing of torque and position signals, the electric signal testing unit tests the breaking inspection voltage/current signals of the mining isolating switch, the driving mechanism control unit converts the DSP signals into action signals of the driving mechanism and performs starting, stopping and speed regulation control on the driving mechanism, and the PLC is used for realizing system control, voltage, current and other parameter acquisition and the like.
Description
Technical Field
The utility model relates to the technical field of mine electrical inspection, in particular to a mining disconnecting switch breaking inspection control system based on torque limitation.
Background
The mining isolating switch is an important element of equipment such as a coal mine explosion-proof electromagnetic starter, a coal mine explosion-proof excavator electric control box, a coal mine explosion-proof low-voltage vacuum soft starter, a coal mine explosion-proof illumination comprehensive protection device and the like, plays roles in electrical isolation and no-load breaking of a power supply and the equipment in a power grid, and is directly related to mine safety production and stable operation of the power grid when the quality of a product is good or bad. At present, when the mining isolating switch is used for breaking and testing, an external force is needed to drive an internal operating mechanism to pass through a dead point so as to drive a moving contact to move. The existing mining isolating switch adopts a motor mechanism and a hydraulic mechanism as operating mechanisms to provide external driving force to complete breaking detection, torque monitoring and over-torque protection are not carried out in the whole detection process, so that the mining isolating switch breaking test detection process can be forcibly pulled open by the operating mechanisms if contacts are slightly adhered, the detection result is inaccurate, the objectivity and fairness of detection and detection activities are seriously influenced, and accident potential is also brought to mine safety production.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a mining disconnecting switch breaking detection control system based on torque limitation to realize control of breaking detection of a mining disconnecting switch, aiming at the defects of the prior art.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: the mining isolating switch breaking inspection control system based on torque limitation comprises a DSP (digital signal processor), a power supply unit, a torque sensor, a signal processing unit, a position sensor, a driving mechanism control unit, an electric signal testing module, a communication unit, an operation panel and a PLC (programmable logic controller); wherein, the signal output end of the power supply unit is electrically connected with the power supply input terminal of the DSP, the signal output end of the torque sensor is electrically connected with the signal channel A input end of the signal processing unit, two ends of the main shaft of the torque sensor are respectively mechanically connected with the mine isolating switch rotating shaft and one end of the main shaft of the driving mechanism through flanges, the signal input end of the position sensor is mechanically connected with the other end of the main shaft of the driving mechanism, the signal output end of the position sensor is electrically connected with the signal channel B input end of the signal processing unit, the signal output end of the signal processing unit is electrically connected with the signal input end of the DSP, the control signal input end of the driving mechanism is electrically connected with the signal output end of the control unit of the driving mechanism, the signal input end of the control unit of the driving mechanism is electrically connected with the signal output end of the PLC, the signal output end of the operation panel is electrically connected with the control signal input end of the PLC, the communication signal input/output end of the DSP is electrically connected with the communication signal output/input end of the PLC through the communication unit; the signal input end of the electric signal testing module is electrically connected with the electric signal testing end of the mining isolating switch, and the signal output end of the electric signal testing module is electrically connected with the analog signal input end of the PLC.
Preferably, the communication unit comprises an isolation transceiver and a matching resistor R1; CAN communication ports CAN-RD and CAN-TD of the DSP are respectively and electrically connected with RXD and TXD ports of the isolation transceiver, CANH and CANL ports of the isolation transceiver are respectively and electrically connected with two ends of a matching resistor R1, and two ends of a matching resistor R1 are also electrically connected with a communication port of the PLC.
Preferably, the electric signal testing module comprises a voltage testing unit and a current testing unit, a signal input end of the voltage testing unit is electrically connected with a voltage testing end of the mining isolating switch, a signal output end of the voltage testing unit is electrically connected with an analog signal input end of the PLC, a signal input end of the current testing unit is mechanically connected with a current testing end of the mining isolating switch, and a signal output end of the current testing unit is electrically connected with an analog signal input end of the PLC.
Preferably, the mining disconnecting switch breaking inspection control system based on torque limitation further comprises a clock unit, and a signal output end of the clock unit is electrically connected with a clock signal input end of the DSP.
Preferably, the mining disconnecting switch breaking inspection control system based on torque limitation further comprises a reset unit, and a signal output end of the reset unit is electrically connected with a reset signal input end of the DSP.
Preferably, the mining disconnecting switch breaking inspection control system based on torque limitation further comprises a data storage unit, and a data input end of the data storage unit is electrically connected with a data output end of the DSP.
Preferably, the mining disconnecting switch breaking inspection control system based on torque limitation further comprises a display unit, and a signal input end of the display unit is electrically connected with a display signal output end of the PLC.
Preferably, the mining disconnecting switch breaking inspection control system based on torque limitation further comprises an early warning unit, and a signal input end of the early warning unit is electrically connected with an early warning signal output end of the PLC.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the mining disconnecting switch breaking inspection control system based on torque limitation has the advantages of simple structure, high torque acquisition precision, good system reliability, high automation degree and more reliable result, and meets the development requirement of intelligent detection inspection.
Drawings
Fig. 1 is a block diagram of a mining disconnector breaking inspection control system based on torque limitation according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a communication unit according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.
In this embodiment, a mining disconnecting switch breaking inspection control system based on torque limitation is shown in fig. 1 and includes a DSP, a reset unit, a clock unit, a power supply unit, a torque sensor, a signal processing unit, a position sensor, a driving mechanism, an electrical signal testing module, a display unit, an early warning unit, a communication unit, an operation panel, a driving mechanism control unit, a PLC, and a data storage unit. The signal output ends of the clock unit, the power supply unit and the reset unit are electrically connected with the clock signal input end, the power supply input terminal and the reset signal input end of the DSP; the signal output end of the torque sensor is electrically connected with the signal channel A input end of the signal processing unit, and two ends of a main shaft of the torque sensor are mechanically connected with a rotating shaft of the mining isolating switch and one end of a main shaft of the driving mechanism through flanges respectively; the signal input end of the position sensor is mechanically connected with the other end of the main shaft of the driving mechanism, and the signal output end of the position sensor is electrically connected with the input end of a signal channel B of the signal processing unit; the signal output end of the signal processing unit is electrically connected with the signal input end of the DSP; the control signal input end of the driving mechanism is electrically connected with the signal output end of the driving mechanism control unit, and the signal input end of the driving mechanism control unit is electrically connected with the signal output end of the PLC; the signal input end of the early warning unit is electrically connected with the early warning signal output end of the PLC; the signal output end of the operation panel is electrically connected with the control signal input end of the PLC; the data input end of the data storage unit is electrically connected with the data output end of the DSP; the communication signal input (output) end of the DSP is electrically connected with the communication signal output (input) end of the PLC through the communication unit; the electric signal testing module comprises a voltage testing unit and a current testing unit, wherein a signal input end of the voltage testing unit is electrically connected with a voltage testing end of the mining isolating switch, a signal output end of the voltage testing unit is electrically connected with an analog signal (voltage) input end of the PLC, a signal input end of the current testing unit is mechanically connected with a current testing end of the mining isolating switch, and a signal output end of the current testing unit is electrically connected with an analog signal (current) input end of the PLC.
The DSP in the system realizes torque data acquisition, operation and processing of the mining isolating switch, the reset unit provides an external reset signal for the system, the clock unit provides a clock signal for the system, the power supply unit provides a power supply for the system, the torque sensor tests breaking test torque data of the mining isolating switch, the signal processing unit realizes conversion and filtering of torque and position signals, the position sensor is used for testing the position of a rotating shaft of the mining isolating switch, the driving mechanism adopts a pneumatic mechanism, a hydraulic mechanism or a motor mechanism to provide driving force for breaking operation of the mining isolating switch, the voltage testing unit tests breaking test voltage signals of the mining isolating switch, the current testing unit tests breaking test current signals of the mining isolating switch, the display unit is used for displaying parameters such as voltage, current, torque and running state of the system, and the early warning unit carries out early warning when the system fails, the communication unit realizes data transmission between the DSP and the PLC, the operation panel is used for inputting control instructions to the PLC and providing external operation instructions for the system, the driving mechanism control unit is used for converting DSP signals into action signals of the driving mechanism and carrying out starting, stopping and speed regulation control on the driving mechanism, the PLC is used for realizing system control and collecting parameters such as voltage and current, and the data storage unit realizes torque and position signal storage.
The communication unit adopts a CAN isolation transceiver as a core to design a communication circuit, as shown in fig. 2, a circuit for communication between the DSP and the PLC is composed of the isolation transceiver and a matching resistor R1, CAN communication ports CAN-RD and CAN-TD of the DSP are respectively and electrically connected with RXD and TXD ports of the isolation transceiver, CANH and CANL ports of the isolation transceiver are respectively and electrically connected with two ends of a matching resistor R1, and two ends of a matching resistor R1 are also electrically connected with a communication port of the PLC, in the embodiment, the model of the isolation transceiver is CTM 8251T.
Because different mining disconnecting switches have different operation torques, the mining disconnecting switch breaking inspection control system based on torque limitation needs no-load torque data of the mining disconnecting switches when carrying out torque comparison. In the embodiment, after the mining isolating switch breaking inspection control system based on torque limitation is electrified, 5 times of mining isolating switch no-load torque data are obtained through the test of the torque sensor under the condition that a loop is not electrified (no-load)
Then the mining partition is calculated by the following formulaNo-load torque of the disconnector
：
During the breaking inspection process of the mining isolating switch, the torque of a driving mechanism is different from the no-load torque in the breaking inspection process due to factors such as electrodynamic force, contact ablation and the like, and the torque limit value in the breaking inspection process
Setting the value to be K times of the idling torque generally, and calculating the torque limit value as follows:
in the formula, K is a torque limiting coefficient (generally taking a value of 1.2-2.0) and has no unit.
In this embodiment, the working process of the mining disconnecting switch breaking inspection control system based on torque limitation is as follows:
(1) after the system is electrified, 5 times of no-load torque data of the mining disconnecting switch are obtained through the test of the torque sensor under the condition that the breaking detection circuit of the mining disconnecting switch is not electrified (no-load)
And applying no-load torque data
The signal processing unit processes the torque and transmits the torque to the DSP, and the DSP calculates the idle torque
；
(2) The DSP passes through the no-load torque coefficient (generally taking 1.2-2.0, rated value)The no-load torque coefficient of the mining isolating switch with the voltage of 1140V and the rated current of 400A is 2.0), and the torque limit value is obtained by calculation
；
(3) The system runs with load (applies voltage and current), and the torque sensor acquires the torque data of the mining isolating switch in real time in the breaking and testing process
N is the total number of torque data collected in the breaking inspection process, the collected torque data is transmitted to the DSP after being processed by the signal processing unit, the DSP sends the collected torque data to the data storage unit for storage, and the torque data is stored
And torque limit value
Make a comparison if
Is greater than
And if the mining isolating switch is in the off state, the DSP determines that the contact of the mining isolating switch is in fusion welding, sends a contact fusing signal to the PLC through the communication unit, the breaking inspection test is stopped, meanwhile, the PLC sends an early warning signal to the early warning unit, and the early warning unit carries out early warning.
In the breaking inspection process, the electric signal testing module collects voltage and current data in the breaking inspection of the mining disconnecting switch through the voltage testing unit and the current testing unit and transmits the voltage and current data to the PLC, and the PLC displays the voltage and current data in the display unit.
The mining isolating switch breaking inspection process comprises the following steps: the PLC controls the driving mechanism to act through the driving mechanism control unit, the driving force of the driving mechanism acts on a main shaft of the mining isolating switch through the torque sensor to drive a moving contact of the mining isolating switch to move, the position sensor detects a signal of an action angle (the action angle of the mining isolating switch with rated voltage of 1140V and rated current of 400A is 72 degrees) of the driving mechanism and feeds the signal back to the DSP after passing through the signal processing unit, the DSP calculates the action angle of the mining isolating switch and feeds the action angle back to the PLC, when the action angle reaches 72 degrees, the PLC controls the driving mechanism to stop acting through the driving mechanism control unit, at the moment, the moving contact and the static contact of the mining isolating switch are separated, and the breaking inspection of the mining isolating switch is completed.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions and scope of the present invention as defined in the appended claims.
Claims (8)
1. The utility model provides a mining isolator divides disconnected inspection control system based on torque limitation which characterized in that: the device comprises a DSP, a power supply unit, a torque sensor, a signal processing unit, a position sensor, a driving mechanism control unit, an electric signal testing module, a communication unit, an operation panel and a PLC; wherein, the signal output end of the power supply unit is electrically connected with the power supply input terminal of the DSP, the signal output end of the torque sensor is electrically connected with the signal channel A input end of the signal processing unit, two ends of the main shaft of the torque sensor are respectively mechanically connected with the mine isolating switch rotating shaft and one end of the main shaft of the driving mechanism through flanges, the signal input end of the position sensor is mechanically connected with the other end of the main shaft of the driving mechanism, the signal output end of the position sensor is electrically connected with the signal channel B input end of the signal processing unit, the signal output end of the signal processing unit is electrically connected with the signal input end of the DSP, the control signal input end of the driving mechanism is electrically connected with the signal output end of the control unit of the driving mechanism, the signal input end of the control unit of the driving mechanism is electrically connected with the signal output end of the PLC, the signal output end of the operation panel is electrically connected with the control signal input end of the PLC, the communication signal input/output end of the DSP is electrically connected with the communication signal output/input end of the PLC through the communication unit; the signal input end of the electric signal testing module is electrically connected with the electric signal testing end of the mining isolating switch, and the signal output end of the electric signal testing module is electrically connected with the analog signal input end of the PLC.
2. The mining disconnector breaking inspection control system based on torque limitation according to claim 1, characterized in that: the communication unit comprises an isolation transceiver and a matching resistor R1; CAN communication ports CAN-RD and CAN-TD of the DSP are respectively and electrically connected with RXD and TXD ports of the isolation transceiver, CANH and CANL ports of the isolation transceiver are respectively and electrically connected with two ends of a matching resistor R1, and two ends of a matching resistor R1 are also electrically connected with a communication port of the PLC.
3. The mining disconnector breaking inspection control system based on torque limitation according to claim 2, characterized in that: the electric signal testing module comprises a voltage testing unit and a current testing unit, wherein a signal input end of the voltage testing unit is electrically connected with a voltage testing end of the mining isolating switch, a signal output end of the voltage testing unit is electrically connected with an analog signal input end of the PLC, a signal input end of the current testing unit is mechanically connected with a current testing end of the mining isolating switch, and a signal output end of the current testing unit is electrically connected with an analog signal input end of the PLC.
4. The mining disconnector breaking inspection control system based on torque limitation according to claim 1, characterized in that: the mining isolating switch breaking detection control system based on the torque limitation further comprises a clock unit, and a signal output end of the clock unit is electrically connected with a clock signal input end of the DSP.
5. The mining disconnector breaking inspection control system based on torque limitation according to claim 1, characterized in that: the mining isolating switch breaking detection control system based on torque limitation further comprises a reset unit, and a signal output end of the reset unit is electrically connected with a reset signal input end of the DSP.
6. The mining disconnector breaking inspection control system based on torque limitation according to claim 1, characterized in that: the mining isolating switch breaking detection control system based on the torque limitation further comprises a data storage unit, and a data input end of the data storage unit is electrically connected with a data output end of the DSP.
7. The mining disconnector breaking inspection control system based on torque limitation according to claim 1, characterized in that: the mining isolating switch breaking detection control system based on torque limitation further comprises a display unit, and a signal input end of the display unit is electrically connected with a display signal output end of the PLC.
8. The mining disconnector breaking inspection control system based on torque limitation according to any one of claims 2 to 7, characterized in that: the mining isolating switch breaking detection control system based on torque limitation further comprises an early warning unit, and a signal input end of the early warning unit is electrically connected with an early warning signal output end of the PLC.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122889878.3U CN216248834U (en) | 2021-11-24 | 2021-11-24 | Mining isolator divides disconnected inspection control system based on torque limit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122889878.3U CN216248834U (en) | 2021-11-24 | 2021-11-24 | Mining isolator divides disconnected inspection control system based on torque limit |
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Effective date of registration: 20220624 Address after: 113122 No.11 Binhe Road, Shenfu demonstration area, Fushun City, Liaoning Province Patentee after: Fushun China Coal Science & Engineering Testing Center Co.,Ltd. Patentee after: Shenyang Research Institute Co., Ltd Address before: 113001 No. 11 Binhe Road, Shenfu demonstration zone, Shenyang, Liaoning Patentee before: Shenyang Research Institute Co.,Ltd. |
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