Mining illumination signal comprehensive protection device

Abstract

The utility model provides a mining lighting signal comprehensive protection device, and belongs to the technical field of lighting protection. The problem that the safety and the reliability of a power supply system are affected due to incomplete monitoring of an existing comprehensive protection device for mining illumination is solved. Comprising a shell, an LCD display screen and a plurality of indicating lamps are arranged on the front face of the shell, a comprehensive protector ZB is arranged in the shell, the comprehensive protector ZB adopts a PCB integrated with a controller, a storage, a power module, an AD module and a communication module, a 32-bit single-chip microcomputer serves as a core, an industrial-grade peripheral chip is supplemented, and the comprehensive protector ZB serves as a CPU unit for data collection, operation, processing and command output; a liquid crystal display screen, an LED indicating lamp, an external button for realizing functions of closing, opening, ascending, descending, short test and leakage test and the like are used as a man-machine interaction unit; a manual working mode and an automatic working mode are included; the underground 127V lighting signal protection device is applied to underground 127V lighting signal protection.

Description

Technical Field

[0001] The utility model provides a comprehensive protection device for mine lighting signals, belonging to the technical field of mine lighting. Background Art

[0002] In recent years, the rapid development of society has led to an increasing demand for mineral resources in my country, and the mining intensity of coal mines has gradually increased, and the reliability and stability requirements of coal mine power supply systems have become increasingly stringent. At present, 127V lighting lamps are generally used for lighting underground. The lighting lamps are generally fixed in a protective shell and are equipped with a comprehensive protection device for monitoring lighting signals and power supply control. However, the comprehensive protection devices currently used lack comprehensive monitoring of the power supply, power supply control and leakage of lighting and signal loads. For example, a mine-use flameproof dual-power multi-circuit lighting signal comprehensive protection device disclosed in CN219268553U, although it realizes independent control of 127V power supply equipment, it only realizes the control of lighting signals, and cannot realize leakage monitoring of the power supply system during lighting. Its monitoring is not comprehensive, affecting the safety and reliability of the power supply system. Utility Model Content

[0003] In order to solve the problem that the current comprehensive protection device for mining lighting does not fully monitor and affects the safety and reliability of the power supply system, the utility model proposes a comprehensive protection device for mining lighting signals, the purpose of which is to achieve comprehensive monitoring of the power supply system by improving the hardware or the combined connection of hardware modules and / or circuits.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a comprehensive protection device for mining lighting signals, used for underground 127V lighting signals, including a shell, the front of which is provided with an LCD display and multiple indicator lights, and a comprehensive protector ZB is provided inside the shell. The comprehensive protector ZB adopts a PCB circuit board integrated with a controller, a memory, a power module, an AD module, and a communication module. The circuit structure of the periphery of the comprehensive protector ZB is as follows:

[0005] The power interface of the integrated protector ZB is connected to the AC127V power supply, which is the output end of the auxiliary transformer BT2. The auxiliary transformer BT2 adopts a multi-winding transformer, and the output end also outputs AC36V and AC10V voltages. The input end of the auxiliary transformer BT2 is connected to the U and W phases of the output end of the main transformer BT1. The input end of the main transformer BT1 is connected to the three-phase power supply. The U and W phase power lines of the three-phase power supply are directly connected to the power carrier communication interface of the integrated protector ZB through the power line coupler. The U, V, and W phase outgoing lines of the three-phase power supply are connected in series with the main contactor KM after passing through the main transformer BT1. The U, V, and W phase power lines after the main contactor KM are connected in series respectively. Current transformer CT; wherein the U-phase incoming and outgoing terminals of the main transformer BT1 are respectively connected to fuses FU1 and FU3, and the W-phase incoming and outgoing terminals of the main transformer BT1 are respectively connected to fuses FU2 and FU4, one end of the three current transformers CT are respectively connected to the corresponding signal input terminals of the integrated protector ZB through wires, and the other ends of the three current transformers CT are connected in parallel and then connected to the input terminal of the integrated protector ZB, and one end of the leakage test resistor R1 is also connected in parallel to the U-phase power line after the main contactor KM, and the other end of the leakage test resistor R1 is connected in series to the leakage test switch LS and then grounded, and the control line of the leakage test switch LS is connected to the leakage test output terminal of the integrated protector ZB;

[0006] A three-phase reactor SK is also connected in parallel to the outgoing line end of the main transformer BT1. The neutral point of the three-phase reactor SK is connected to the corresponding terminal of the integrated protector ZB as the internal analog circuit detection of the integrated protector ZB.

[0007] The live wire of the AC36V output voltage at the output end of the auxiliary transformer BT2 is connected in series with the fuse FU5 and then connected in parallel with three wires, one of which is connected to the terminal 15 of the integrated protector ZB, the other is connected in series with one end of the normally open contact of the main contactor, the last is connected in series with one end of the gate switch, the other end of the normally open contact of the main contactor is connected in series with the other end of the gate switch and then connected in parallel with the terminal 16 of the integrated protector ZB and one end of the opening switch, the other end of the opening switch is connected to the terminal 13 of the integrated protector ZB through a wire, the terminal 14 of the integrated protector ZB is connected in series with the main contactor coil and then connected to the neutral wire of the AC36V output voltage;

[0008] The live wire of the AC10V output voltage is connected in series with the fuse FU7, the overcurrent test resistor R2, and the over-test switch GS, and then connected to the corresponding signal input terminal of the integrated protector ZB. The neutral wire of the AC10V output voltage is connected to the input terminal of the integrated protector ZB.

[0009] The integrated protector ZB is also connected to gas input, wind power input, switch status, short circuit test, and voice-activated switch, and is also connected to control signals for controlling the up, down, input, confirm, and reset buttons on the LCD display.

[0010] The signal input terminal of the integrated protector ZB is also connected to a temperature sensor provided on the main transformer BT1 for real-time acquisition of the operating temperature of the main transformer BT1.

[0011] The controller of the integrated protector ZB adopts the STM32F103RBT6 single-chip microcomputer, the 8-11 pins of the controller are respectively connected to the communication indicator light, the fault indicator light, the closing indicator light and the opening indicator light, the 24 pin of the controller is connected to the temperature sensor, the 30 / 40 pins of the controller are respectively connected to the leakage test switch LS and the over-test switch GS, the 14 pin of the controller is connected to the neutral point of the three-phase reactor SK, the 29 / 30 / 33 / 34 / 35 pins of the controller are respectively connected to the input, up, down, confirmation, and reset buttons, the SPI interface of the controller is connected to the LCD display, the 26 / 27 pins of the controller are respectively connected to the gas interlock and the wind power interlock switch, and the 36 pin of the controller is connected to the voice-controlled switch.

[0012] The comprehensive protector ZB is used in conjunction with lighting switches with voltage levels of 660V and 1140V and capacities of 6.0, 8.0, 10.0, 12.5, and 16.0KVA.

[0013] The LCD display screen adopts a 4×8 Chinese character type liquid crystal display screen, and the model is CH12864.

[0014] The indicator lights include 1 yellow fault light, 1 green power light, 1 green opening light, 1 red closing light and 1 green communication indicator light.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the utility model takes a 32-bit single-chip microcomputer as the core, supplemented by an industrial-grade peripheral chip, as a CPU unit for data acquisition, calculation, processing, and command output; a 4×8 Chinese character LCD display, LED indicator light, and external buttons for closing, opening, up, down, short test, and leakage test functions as a human-computer interaction unit; it can realize manual and automatic working modes, and can display real-time information interfaces such as three-phase current, insulation resistance, system voltage, main transformer temperature, and switch status. The commissioning of this device improves the safety and reliability of the underground power supply system in coal mines, integrates detection, control, communication, protection, alarm and other functions, can better adapt to the working environment under the mine, and further reduce the risk of underground operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings:

[0017] Figure 1 This is the peripheral wiring diagram of the protection device of the utility model;

[0018] Figure 2 The figure is the circuit schematic diagram of the CPU part of the protector of the utility model. DETAILED DESCRIPTION

[0019] like Figure 1-2 As shown, the utility model provides a mining lighting signal comprehensive protection device, including a shell, a 4×8 Chinese character LCD display screen is arranged on the front of the shell, a fault indicator light, a power indicator light, a switch-off indicator light, a switch-on indicator light and a communication indicator light are arranged below the LCD display screen, and a comprehensive protector ZB is arranged inside the shell. The comprehensive protector ZB takes a 32-bit single-chip microcomputer as the core and is supplemented by an industrial-grade peripheral chip. The protection is reliable and sensitive, and the measurement accuracy is high. The comprehensive protector ZB is a PCB circuit board integrated with a controller, a memory, a power module, an AD module, a communication module, etc. The PCB circuit board is three-proof Anti-interference measures such as paint and high-temperature treatment make the comprehensive protection device have extremely high anti-interference ability; and it adopts standardized and modular hardware design, high-precision A / D conversion, power supply module, crystal timing; it adopts RS485 and power carrier communication technology, and realizes communication networking function through power cable, without laying communication cables, and can realize communication wherever there is electricity; high-reliability memory is used to store important data such as protection settings, system parameters and event records to ensure that power is not lost; the utility model organically integrates automation technology and mining power supply equipment technology to ensure the reliable, safe and efficient realization of the above functions.

[0020] The utility model is installed inside different switches when in use, and forms a control system with the components inside the switches. The integrated protector ZB is connected to the peripheral sensors, communication interfaces, LCD display screens and indicator lights through wires. The peripheral wiring circuit of the integrated protector ZB is as follows: Figure 1 As shown, the circuit connection is as follows.

[0021] The power interface of the integrated protector ZB is connected to the AC127V power supply, which is the output end of the auxiliary transformer BT2. The auxiliary transformer BT2 adopts a multi-winding transformer, and the output end also outputs AC36V and AC10V voltages. The input end of the auxiliary transformer BT2 is connected to the U and W phases of the output end of the main transformer BT1. The input end of the main transformer BT1 is connected to the three-phase power supply. The U and W phase power lines of the three-phase power supply are directly connected to the power carrier communication interface of the integrated protector ZB through the power line coupler. The U, V, and W phase outgoing lines of the three-phase power supply are connected in series with the main contactor KM after passing through the main transformer BT1. The U, V, and W phase power lines after the main contactor KM are connected in series respectively. Current transformer CT; wherein the U-phase incoming and outgoing terminals of the main transformer BT1 are connected to fuses FU1 and FU3 respectively, and the W-phase incoming and outgoing terminals of the main transformer BT1 are connected to fuses FU2 and FU4 respectively, one end of the three current transformers CT are connected to the corresponding signal input terminals of the integrated protector ZB through wires, and the other ends of the three current transformers CT are connected in parallel and then connected to the input terminal of the integrated protector ZB. One end of the leakage test resistor R1 is also connected in parallel to the U-phase power line after the main contactor KM, and the other end of the leakage test resistor R1 is connected in series to the leakage test switch LS and then grounded, and the control line of the leakage test switch LS is connected to the leakage test output terminal of the integrated protector ZB. A three-phase reactor SK is also connected in parallel to the outgoing terminal of the main transformer BT1, and the neutral point of the three-phase reactor SK is connected to the terminal 23 (RO) of the integrated protector ZB, and the terminal 24 (GND) is grounded, as the internal analog circuit detection of the integrated protector ZB. The leakage test resistor R1 has a current limiting function. When the leakage test switch LS is closed and the main circuit is grounded, the integrated protector ZB detects a decrease in the insulation resistance value between circuits and reports leakage protection, thereby simulating a leakage test.

[0022] The live wire of the AC36V output voltage at the output end of the auxiliary transformer BT2 is connected in series with the fuse FU5 and then connected in parallel with three wires. One wire is connected to the terminal 15 of the integrated protector ZB, another wire is connected in series with one end of the normally open contact of the main contactor, and the last wire is connected in series with one end of the gate switch. The other end of the normally open contact of the main contactor is connected in series with the other end of the gate switch and then connected in parallel with the terminal 16 of the integrated protector ZB and one end of the opening switch. The other end of the opening switch is connected to the terminal 13 of the integrated protector ZB through a wire. The terminal 14 of the integrated protector ZB is connected in series with the main contactor coil and then connected to the neutral wire of the AC36V output voltage. The live wire of the AC127V output voltage is connected in series with the fuse FU6 and then connected to the positive pole of the AC127 power supply of the integrated protector ZB, and the neutral wire of the AC127V output voltage is connected to the negative pole of the AC127 power supply of the integrated protector ZB. The live wire of the AC10V output voltage is connected in series with the fuse FU7, the overcurrent test resistor R2, and the overtest switch GS, and then connected to the corresponding signal input terminal of the integrated protector ZB. The neutral wire of the AC10V output voltage is connected to the input terminal of the integrated protector ZB. The overcurrent test resistor R2 has a current limiting function. When the overtest switch GS is closed, the IX phase current increases, and the integrated protector ZB trips due to a fault, thereby simulating an overcurrent test.

[0023] The integrated protector ZB is also connected to gas input, wind power input, switch status, short circuit test, voice-activated switch, and is connected to control signals for controlling the up, down, input, confirmation, and reset buttons on the LCD display. The signal input terminal of the integrated protector ZB is also connected to a temperature sensor provided on the main transformer BT1, which is used to collect the operating temperature of the main transformer BT1 in real time.

[0024] The controller of the integrated protector ZB adopts the STM32F103RBT6 microcontroller. Its principle is as follows: Figure 2 As shown, pins 8-11 of the controller are respectively connected to the communication indicator light, fault indicator light, closing indicator light and opening indicator light, pin 24 of the controller is connected to the temperature sensor, pins 30 / 40 of the controller are respectively connected to the leakage test switch LS and the over-test switch GS, pin 14 of the controller is the 23 terminal of the integrated protector ZB, connected to the neutral point of the three-phase reactor SK, pins 29 / 30 / 33 / 34 / 35 of the controller are respectively connected to the input, up, down, confirmation and reset buttons, the SPI interface of the controller is connected to the LCD display, pins 26 / 27 of the controller are respectively connected to the gas interlock and wind power interlock switches, and pin 36 of the controller is connected to the voice-activated switch.

[0025] The utility model proposes a mine lighting signal comprehensive protection device that integrates detection, control, communication, events, protection and other functions. It can be used in conjunction with lighting switches with voltage levels of 660V and 1140V and capacities of 6.0, 8.0, 10.0, 12.5, and 16.0KVA to monitor and protect the power supply, power supply control, and leakage of 127V lighting and signal loads in coal mines. The latest 50 historical fault records can be queried. When a fault occurs, the fault information will automatically pop up and the fault light will be lit. The event data is stored locally and will not be lost when the power is off, so it can be queried at any time. The LCD display screen of the protection device is provided with buttons such as "up", "down", "confirm", and "reset". Among them, the "up", "down", and "confirm" keys are used to select menu items and adjust parameters; the "confirm" key is used to enter the menu and cooperate with the "up" and "down" keys to set parameters. The "reset" key has return and reset functions. The reset function is a function key for restoring the device to a normal protection state when the comprehensive protection device fails, and the return key is a function key for returning to the main interface in the parameter setting interface.

[0026] The display of the integrated protection device includes a 4×8 Chinese character LCD screen with backlight function, 1 yellow fault light, 1 green power light, 1 green opening light, 1 red closing light and 1 green communication indicator light. In normal operation, the display screen will simultaneously display the three-phase working current value and the grid voltage value. During setting, various menus, various setting parameter values, fault parameter values ​​and test results are displayed by pressing buttons. In normal operation, the fault indicator light is off and the power indicator light is on. If the switch is in the closed state, the closing indicator light is on. When the integrated protection device finds a fault (such as undervoltage, overload, etc.), the protector trips and the yellow fault light is on.

[0027] The integrated protection device of the utility model is designed to select "local control" or "remote control" to control the start and stop. "Remote control" means that the lighting device controls the start and stop of the integrated protection device through the communication interface.

[0028] The utility model's integrated protection device detects the insulation condition of the power supply line to the ground through the three-phase reactor SK before closing. When it is less than or equal to 12kΩ, the resistance value is displayed, and when it is greater than 12kΩ, ∞ is displayed. When the insulation resistance is lower than 4kΩ+20%, the integrated protection device alarms. When the insulation resistance of the main circuit rises to 6kΩ, the leakage lock is automatically released. After closing, when the integrated protection device detects that the insulation resistance is lower than 2kΩ+20%, the integrated protection device alarms.

[0029] The integrated protection device of the utility model provides system communication function, transmits real-time system three-phase current, system voltage, insulation resistance, switch state, main transformer temperature and other data; device address: value range 1~255. In order to distinguish different devices, communication rate (baud rate): 0: 1200, 1: 2400, 2: 4800, 3: 9600, 4: 19200, 5: 38400, 6: 51200, 7: 115200 and other adjustable, when communicating with the host computer, select the same baud rate as the host computer, communication check: 0: no check; 1: odd check; 2: even check.

[0030] Regarding the specific structure of the utility model, it should be explained that the connection relationship between the various component modules adopted in the utility model is definite and feasible. Except for special instructions in the embodiments, the specific connection relationship can bring corresponding technical effects and solve the technical problems raised by the utility model without relying on the execution of corresponding software programs. The components, modules, models of specific components and the connection methods between each other appearing in the utility model, as well as the conventional use methods and expected technical effects brought about by the above-mentioned technical features, except for specific instructions, all belong to the disclosed contents in patents, journal articles, technical manuals, technical dictionaries, and textbooks that can be obtained by technical personnel in this field before the application date, or belong to the existing technologies such as conventional technologies and common knowledge in this field, and there is no need to elaborate, so that the technical solution provided in this case is clear, complete and feasible, and the corresponding physical products can be reproduced or obtained according to the technical means.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A comprehensive protection device for mining lighting signals, used for underground 127V lighting signals, characterized by: It includes a housing, an LCD display and multiple indicator lights are arranged on the front of the housing, and a comprehensive protector ZB is arranged inside the housing. The comprehensive protector ZB adopts a PCB circuit board integrated with a controller, a memory, a power module, an AD module, and a communication module. The circuit structure of the periphery of the comprehensive protector ZB is as follows: The power interface of the integrated protector ZB is connected to the AC127V power supply, which is the output end of the auxiliary transformer BT2. The auxiliary transformer BT2 adopts a multi-winding transformer, and the output end also outputs AC36V and AC10V voltages. The input end of the auxiliary transformer BT2 is connected to the U and W phases of the output end of the main transformer BT1. The input end of the main transformer BT1 is connected to the three-phase power supply. The U and W phase power lines of the three-phase power supply are directly connected to the power carrier communication interface of the integrated protector ZB through the power line coupler. The U, V, and W phase outgoing lines of the three-phase power supply are connected in series with the main contactor KM after passing through the main transformer BT1. The U, V, and W phase power lines after the main contactor KM are connected in series respectively. Current transformer CT; wherein the U-phase incoming and outgoing terminals of the main transformer BT1 are respectively connected to fuses FU1 and FU3, and the W-phase incoming and outgoing terminals of the main transformer BT1 are respectively connected to fuses FU2 and FU4, one end of the three current transformers CT are respectively connected to the corresponding signal input terminals of the integrated protector ZB through wires, and the other ends of the three current transformers CT are connected in parallel and then connected to the input terminal of the integrated protector ZB, and one end of the leakage test resistor R1 is also connected in parallel to the U-phase power line after the main contactor KM, and the other end of the leakage test resistor R1 is connected in series to the leakage test switch LS and then grounded, and the control line of the leakage test switch LS is connected to the leakage test output terminal of the integrated protector ZB; A three-phase reactor SK is also connected in parallel to the outgoing line end of the main transformer BT1. The neutral point of the three-phase reactor SK is connected to the corresponding terminal of the integrated protector ZB as the internal analog circuit detection of the integrated protector ZB. The live wire of the AC36V output voltage at the output end of the auxiliary transformer BT2 is connected in series with the fuse FU5 and then connected in parallel with three wires, one of which is connected to the terminal 15 of the integrated protector ZB, the other is connected in series with one end of the normally open contact of the main contactor, the last is connected in series with one end of the gate switch, the other end of the normally open contact of the main contactor is connected in series with the other end of the gate switch and then connected in parallel with the terminal 16 of the integrated protector ZB and one end of the opening switch, the other end of the opening switch is connected to the terminal 13 of the integrated protector ZB through a wire, the terminal 14 of the integrated protector ZB is connected in series with the main contactor coil and then connected to the neutral wire of the AC36V output voltage; The live wire of the AC10V output voltage is connected in series with the fuse FU7, the overcurrent test resistor R2, and the over-test switch GS, and then connected to the corresponding signal input terminal of the integrated protector ZB. The neutral wire of the AC10V output voltage is connected to the input terminal of the integrated protector ZB. The integrated protector ZB is also connected to gas input, wind power input, switch status, short circuit test, and voice-activated switch, and is also connected to control signals for controlling the up, down, input, confirm, and reset buttons on the LCD display.

2. A mine lighting signal comprehensive protection device according to claim 1, characterized in that: The signal input terminal of the integrated protector ZB is also connected to a temperature sensor provided on the main transformer BT1 for real-time acquisition of the operating temperature of the main transformer BT1.

3. A mine lighting signal comprehensive protection device according to claim 2, characterized in that: The controller of the integrated protector ZB adopts the STM32F103RBT6 single-chip microcomputer, the 8-11 pins of the controller are respectively connected to the communication indicator light, the fault indicator light, the closing indicator light and the opening indicator light, the 24 pin of the controller is connected to the temperature sensor, the 30 / 40 pins of the controller are respectively connected to the leakage test switch LS and the over-test switch GS, the 14 pin of the controller is connected to the neutral point of the three-phase reactor SK, the 29 / 30 / 33 / 34 / 35 pins of the controller are respectively connected to the input, up, down, confirmation, and reset buttons, the SPI interface of the controller is connected to the LCD display, the 26 / 27 pins of the controller are respectively connected to the gas interlock and the wind power interlock switch, and the 36 pin of the controller is connected to the voice-controlled switch.

4. A mining lighting signal integrated protection device according to claim 3, characterized in that: The comprehensive protector ZB is used in conjunction with lighting switches with voltage levels of 660V and 1140V and capacities of 6.0, 8.0, 10.0, 12.5, and 16.0KVA.

5. The integrated protection device for lighting signals for mines according to claim 1 is characterized in that: The LCD display screen adopts a 4×8 Chinese character type liquid crystal display screen, and the model is CH12864.

6. A mining lighting signal comprehensive protection device according to claim 1, characterized in that: The indicator lights include 1 yellow fault light, 1 green power light, 1 green opening light, 1 red closing light and 1 green communication indicator light.

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