CN102255379A - Mining explosion-proof dual-power switching power box - Google Patents
Mining explosion-proof dual-power switching power box Download PDFInfo
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- CN102255379A CN102255379A CN2011102160656A CN201110216065A CN102255379A CN 102255379 A CN102255379 A CN 102255379A CN 2011102160656 A CN2011102160656 A CN 2011102160656A CN 201110216065 A CN201110216065 A CN 201110216065A CN 102255379 A CN102255379 A CN 102255379A
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Abstract
The invention discloses a mining explosion-proof dual-power switching power box, which belongs to the technical field of explosion-proof dual-power automatic switching control devices for coal mines. The technical problem to be solved is to provide a dual-power power supply system with a primary loop and a secondary loop, and the dual-power power supply system has quick response, high accuracy and safety and reliability in use, avoids contact sparks and is suitable for occasions such as the coal mines and the like with explosive gas environments. The adopted technical scheme is that: the input ends 1.1 and 1.2 of an input unit of a dual-power transformer are connected with a first AC power supply; the input ends 1.3 and 1.4 of the input unit of the dual-power transformer are connected with a second AC power supply; and the output ends 1.5, 1.6, 1.7 and 1.8 of the input unit of the dual-power transformer are connected with the input ends 2.1, 2.2, 2.3 and 2.4 of a switching unit of a dual-power solid state relay respectively. The mining explosion-proof dual-power switching power box is applied in the fields of coal mines, factories and the like with power demands.
Description
Technical field
Flame-proof mine duplicate supply Switching power case of the present invention belongs to coal mine with explosion-proof dual-power automatic switchover control device technical field.
Background technology
In the dual power supply technology that existing mine explosion-suppression duplicate supply power supply box uses, when the master control power supply generation loss of power accident needs commutation circuit, switch to storage battery power supply; Existing flame proof power supply box exists to have no progeny in the single power supply and can't keep powering, and stand-by power supply switches untimely, and switching time is long, and power supply instability the contact may occur and produce safety problems such as spark in the circuit working.
Summary of the invention
The present invention overcomes the deficiency that prior art exists, technical problem to be solved is: a kind of flame-proof mine duplicate supply Switching power case is provided, the dual power supply system of major loop subloop is set, response speed is fast, precision is high, contactless spark, safe and reliable, be suitable for the place that colliery etc. has explosive gas atmosphere and use.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: flame-proof mine duplicate supply Switching power case comprises: duplicate supply transformer input unit, duplicate supply solid-state relay switch unit, DC power source unit, duplicate supply switched voltage protection control unit, current detecting protection output unit, first AC power and second AC power;
The input 1.1,1.2 of duplicate supply transformer input unit connects first AC power, and the input 1.3,1.4 of duplicate supply transformer input unit connects second AC power; The output 1.5,1.6,1.7,1.8 of duplicate supply transformer input unit connects the input 2.1,2.2,2.3,2.4 of duplicate supply solid-state relay switch unit respectively; The output 1.9,1.10,1.11,1.12 of duplicate supply transformer input unit connects the input 4.1,4.2,4.3,4.4 of duplicate supply switched voltage protection control unit respectively;
The port 2.5,2.6 of described duplicate supply solid-state relay switch unit connects the port 4.5,4.6 of duplicate supply switched voltage protection control unit respectively, and the output 2.7,2.8 of duplicate supply solid-state relay switch unit connects the input 5.1,5.2 of current detecting protection output unit respectively;
The input of DC power source unit connects the output 4.8,4.9 of duplicate supply switched voltage protection control unit;
The port 4.7 of described duplicate supply switched voltage protection control unit connects the port 5.3 of current detecting protection output unit;
The circuit structure of described duplicate supply transformer input unit is: input a1, the a2 of transformer T1 connects the input 1.1,1.2 of duplicate supply transformer input unit respectively, and input a3, the a4 of transformer T2 connects the input 1.3,1.4 of duplicate supply transformer input unit respectively; Output b1, the b2 of transformer T1, b3, b4 connect the output 1.5,1.6,1.9,1.10 of duplicate supply transformer input unit respectively, and output b5, the b6 of transformer T2, b7, b8 connect the output 1.7,1.8,1.11,1.12 of duplicate supply transformer input unit respectively;
The circuit structure of described duplicate supply solid-state relay switch unit is: the input of solid-state relay GT1, GT2, GT3, GT4 connects the input 2.2,2.1,2.4,2.3 of duplicate supply solid-state relay switch unit respectively;
The output of solid-state relay GT1 and connect the output of solid-state relay GT3 after connect the output 2.7 of duplicate supply solid-state relay switch unit, the output of solid-state relay GT2 and connect the output of solid-state relay GT4 after connect the output 2.8 of duplicate supply solid-state relay switch unit;
Solid-state relay GT1 anodal and connect the positive pole of solid-state relay GT2 after connect the 12V power supply, solid-state relay GT3 anodal and connect the positive pole of solid-state relay GT4 after connect the 12V power supply;
Connect the emitter of positive-negative-positive triode N7 behind the negative pole series resistor R34 of solid-state relay GT1 and the LED 3, connect the emitter of positive-negative-positive triode N7 behind the negative pole series resistor R32 of solid-state relay GT2 and the LED 4, connect the emitter of positive-negative-positive triode N5 behind the negative pole series resistor R33 of solid-state relay GT3 and the LED 5, connect the emitter of positive-negative-positive triode N5 behind the negative pole series resistor R30 of solid-state relay GT4 and the LED 6;
The base stage of described positive-negative-positive triode N7 connects the port 2.5 of duplicate supply solid-state relay switch unit, connect the port 2.6 of duplicate supply solid-state relay switch unit behind the base stage series resistor R45 of described positive-negative-positive triode N5, the equal ground connection of collector electrode of the collector electrode of positive-negative-positive triode N5 and positive-negative-positive triode N7;
The circuit structure of described duplicate supply switched voltage protection control unit is: connect the input 4.3 of duplicate supply switched voltage protection control unit behind the 1 pin serial connection fuse F1 of bridge rectifier modules A D1,3 pin of bridge rectifier modules A D1 connect the input 4.4 of duplicate supply switched voltage protection control unit; Connect the output 4.8 of duplicate supply switched voltage protection control unit behind one end of 2 pin of bridge rectifier modules A D1 and the end of connecting resistance R1 and resistance R 2;
The other end of described resistance R 1 and connect the stiff end of potentiometer RT1 and sliding end after connect 10 pin of voltage comparator integrated chip U1, the other end of described resistance R 2 and connect the stiff end of potentiometer RT2 and sliding end after connect 7 pin of voltage comparator integrated chip U1; 4 pin of bridge rectifier modules A D1 and connect another stiff end of potentiometer RT1 and another stiff end of potentiometer RT2 after ground connection;
Connect the input 4.2 of duplicate supply switched voltage protection control unit behind the 1 pin serial connection fuse F2 of bridge rectifier modules A D2,3 pin of bridge rectifier modules A D2 connect the input 4.1 of duplicate supply switched voltage protection control unit; Connect the output 4.9 of duplicate supply switched voltage protection control unit behind one end of 2 pin of bridge rectifier modules A D2 and the end of connecting resistance R3 and resistance R 4;
The other end of described resistance R 3 and connect the stiff end of potentiometer RT3 and sliding end after connect 8 pin of voltage comparator integrated chip U1, the other end of described resistance R 4 and connect the stiff end of potentiometer RT4 and sliding end after connect 5 pin of voltage comparator integrated chip U1; 4 pin of bridge rectifier modules A D2 and connect another stiff end of potentiometer RT3 and another stiff end of potentiometer RT4 after ground connection; 4 pin of bridge rectifier modules A D2 are connected with 4 pin of bridge rectifier modules A D1;
4 pin of described voltage comparator integrated chip U1 and connect 9 pin of voltage comparator integrated chip U1 after connect the 2.5V power supply, 6 pin of voltage comparator integrated chip U1 and connect 11 pin of voltage comparator integrated chip U1 after connect the 2.5V power supply, 3 pin of voltage comparator integrated chip U1 connect the 12V power supply, the 12 pin ground connection of voltage comparator integrated chip U1;
Connect 13 pin of voltage comparator integrated chip U1 behind the 7 pin series resistor R5 of described voltage comparator integrated chip U1 and the diode D1,1 pin of voltage comparator integrated chip U1 and connect 13 pin of voltage comparator integrated chip U1 after connect the emitter of NPN type triode N2; Connect 2 pin of voltage comparator integrated chip U1 behind the 5 pin series resistor R6 of voltage comparator integrated chip U1 and the diode D2, connect the port 4.6 of duplicate supply switched voltage protection control unit behind an end of 2 pin of voltage comparator integrated chip U1 and the end of connecting resistance R7, resistance R 8 and 14 pin of voltage comparator integrated chip U1;
Connect the collector electrode of positive-negative-positive triode N1 behind the base stage series resistor R9 of described NPN type triode N2, the negative pole of the collector electrode sending and receiving optical diode LED2 of NPN type triode N2, the positive pole of described LED 2 connect the port 4.7 of duplicate supply switched voltage protection control unit;
The emitter of described positive-negative-positive triode N1 connects the 12V power supply, and the base stage of positive-negative-positive triode N1 is connected in series the other end of LED 1 back connecting resistance R7, connects the collector electrode of positive-negative-positive triode N3 after the collector series connection resistance R 10 of positive-negative-positive triode N1 and the resistance R 11; Line ground connection between resistance R 10 and the resistance R 11;
The emitter of described positive-negative-positive triode N3 connects the 12V power supply, and the other end of the base stage connecting resistance R8 of positive-negative-positive triode N3, the collector electrode of positive-negative-positive triode N3 connect the port 4.5 of duplicate supply switched voltage protection control unit;
The circuit structure of described current detecting protection output unit is: 1 pin of photoelectrical coupler GDGL3 and connect the end of positive pole, resistance R 21 of 2 pin, the voltage stabilizing didoe KE1 of photoelectrical coupler GDGL4 after connect the input 5.2 of current detecting protection output unit, 2 pin of photoelectrical coupler GDGL3 and connect 1 pin of photoelectrical coupler GDGL4 and the sliding end of potentiometer RT11 after connect the stiff end of potentiometer RT11; 5 pin of photoelectrical coupler GDGL3 and connect 5 pin of photoelectrical coupler GDGL4 after connect 9 pin of voltage comparator integrated chip U2,4 pin of photoelectrical coupler GDGL3 and 4 pin of photoelectrical coupler GDGL4 also connect back ground connection;
Another stiff end of described potentiometer RT11 and connect the negative pole of voltage stabilizing didoe KE1 after the end of connecting resistance R41; Connect the input of solid-state relay GT6 behind the other end of described resistance R 41 and the connecting resistance R21 other end;
Connect the 12V power supply behind the 9 pin series resistor R20 of described voltage comparator integrated chip U2, connect the 12V power supply behind the 8 pin series resistor R110 of voltage comparator integrated chip U2, ground connection behind the 8 pin series resistor R111 of voltage comparator integrated chip U2,14 pin of voltage comparator integrated chip U2 connect the port 5.3 of current detecting protection output unit;
The input 5.1 of the input termination current detecting protection output unit of solid-state relay GT5 connects the output 5.4 that current detecting is protected output unit behind the output serial connection fuse F4 of solid-state relay GT5; The end of the negative pole connecting resistance R22 of solid-state relay GT5, solid-state relay GT5 anodal and connect the positive pole of solid-state relay GT6 after connect the emitter of NPN type triode N6, the positive pole of sending and receiving optical diode LED14 behind the cathode series resistance R55 of solid-state relay GT5;
The end of the negative pole connecting resistance R26 of described solid-state relay GT6, the output 5.5 of the output termination current detecting protection output unit of solid-state relay GT6; Ground connection behind the negative pole of the other end of described resistance R 22 and sending and receiving optical diode LED14 and the other end of resistance R 26;
Connect the 12V power supply behind the collector electrode of described NPN type triode N6 and the end of connecting resistance R25, connect 2 pin of voltage comparator integrated chip U2 behind the base stage series resistor R56 of NPN type triode N6 and the diode D16; The positive pole of another terminating diode D16 of described resistance R 25;
Connect the port 5.3 of current detecting protection output unit behind the base stage series resistor R23 of positive-negative-positive triode N4 and the LED 7, connect the 12V power supply behind the emitter of positive-negative-positive triode N4 and the end of connecting resistance R27, connect the positive pole of diode D15 after the collector series connection resistance R 31 of positive-negative-positive triode N4;
The negative pole of described diode D15 and connect the positive pole of capacitor C 14 and an end of resistance R 29 after connect 4 pin of voltage comparator integrated chip U2; Connect 5 pin of voltage comparator integrated chip U2 behind the end of the other end of described resistance R 27 and connecting resistance R28 and the end of resistance R 39; Ground connection behind the other end of the other end of the negative pole of described capacitor C 14 and connecting resistance R29 and resistance R 28; 2 pin of another termination voltage comparator integrated chip U2 of described resistance R 39;
The 12 pin ground connection of described voltage comparator integrated chip U2,3 pin of voltage comparator integrated chip U2 connect the 12V power supply.
The beneficial effect that the present invention compared with prior art has is: automatically switch to stand-by unit when too high in principal voltage, low excessively, when stand-by unit overtension, mistake can realize power-off protection when low; The circuit unit that has the voltage self-recovering function after the quick overcurrent of isolated form, short-circuit protection and the fault elimination by the electronic device realization.
This power supply box has that response speed is fast, precision is high, the characteristics of contactless spark, safe and reliable, adaptation colliery etc. has the place of explosive gas atmosphere, and can be 127V at input voltage, maximum power is not more than the occasion of 180W and uses, and can be widely used in the power supply power supply of various watch-dogs of various important events such as coal mine underground monitoring system, communication system, traffic lights and signal lamp etc.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Fig. 1 is the inventive circuit structural representation;
Fig. 2 is the circuit diagram of duplicate supply transformer input unit;
Fig. 3 is the circuit diagram of duplicate supply solid-state relay switch unit;
Fig. 4 is the circuit diagram of duplicate supply switched voltage protection control unit;
Fig. 5 is the circuit diagram of current detecting protection output unit.
Among the figure: 1 to protect output unit, 6 for duplicate supply switched voltage protection control unit, 5 for current detecting for DC power source unit, 4 for duplicate supply solid-state relay switch unit, 3 for duplicate supply transformer input unit, 2 be that first AC power, 7 is second AC power.
Embodiment
As shown in the figure, flame-proof mine duplicate supply Switching power case of the present invention comprises: duplicate supply transformer input unit 1, duplicate supply solid-state relay switch unit 2, DC power source unit 3, duplicate supply switched voltage protection control unit 4, current detecting protection output unit 5, first AC power 6 and second AC power 7;
The input 1.1,1.2 of duplicate supply transformer input unit 1 connects first AC power 6, and the input 1.3,1.4 of duplicate supply transformer input unit 1 connects second AC power 7; The output 1.5,1.6,1.7,1.8 of duplicate supply transformer input unit 1 connects the input 2.1,2.2,2.3,2.4 of duplicate supply solid-state relay switch unit 2 respectively; The output 1.9,1.10,1.11,1.12 of duplicate supply transformer input unit 1 connects the input 4.1,4.2,4.3,4.4 of duplicate supply switched voltage protection control unit 4 respectively;
The port 2.5,2.6 of described duplicate supply solid-state relay switch unit 2 connects the port 4.5,4.6 of duplicate supply switched voltage protection control unit 4 respectively, and the output 2.7,2.8 of duplicate supply solid-state relay switch unit 2 connects the input 5.1,5.2 of current detecting protection output unit 5 respectively;
The input of DC power source unit 3 connects the output 4.8,4.9 of duplicate supply switched voltage protection control unit 4;
The port 4.7 of described duplicate supply switched voltage protection control unit 4 connects the port 5.3 of current detecting protection output unit 5;
The circuit structure of described duplicate supply transformer input unit 1 is: input a1, the a2 of transformer T1 connects the input 1.1,1.2 of duplicate supply transformer input unit 1 respectively, and input a3, the a4 of transformer T2 connects the input 1.3,1.4 of duplicate supply transformer input unit 1 respectively; Output b1, the b2 of transformer T1, b3, b4 connect the output 1.5,1.6,1.9,1.10 of duplicate supply transformer input unit 1 respectively, and output b5, the b6 of transformer T2, b7, b8 connect the output 1.7,1.8,1.11,1.12 of duplicate supply transformer input unit 1 respectively;
The circuit structure of described duplicate supply solid-state relay switch unit 2 is: the input of solid-state relay GT1, GT2, GT3, GT4 connects the input 2.2,2.1,2.4,2.3 of duplicate supply solid-state relay switch unit 2 respectively;
The output of solid-state relay GT1 and connect the output of solid-state relay GT3 after connect the output 2.7 of duplicate supply solid-state relay switch unit 2, the output of solid-state relay GT2 and connect the output of solid-state relay GT4 after connect the output 2.8 of duplicate supply solid-state relay switch unit 2;
Solid-state relay GT1 anodal and connect the positive pole of solid-state relay GT2 after connect the 12V power supply, solid-state relay GT3 anodal and connect the positive pole of solid-state relay GT4 after connect the 12V power supply;
Connect the emitter of positive-negative-positive triode N7 behind the negative pole series resistor R34 of solid-state relay GT1 and the LED 3, connect the emitter of positive-negative-positive triode N7 behind the negative pole series resistor R32 of solid-state relay GT2 and the LED 4, connect the emitter of positive-negative-positive triode N5 behind the negative pole series resistor R33 of solid-state relay GT3 and the LED 5, connect the emitter of positive-negative-positive triode N5 behind the negative pole series resistor R30 of solid-state relay GT4 and the LED 6;
The base stage of described positive-negative-positive triode N7 connects the port 2.5 of duplicate supply solid-state relay switch unit 2, connect the port 2.6 of duplicate supply solid-state relay switch unit 2 behind the base stage series resistor R45 of described positive-negative-positive triode N5, the equal ground connection of collector electrode of the collector electrode of positive-negative-positive triode N5 and positive-negative-positive triode N7;
The circuit structure of described duplicate supply switched voltage protection control unit 4 is: connect the input 4.3 of duplicate supply switched voltage protection control unit 4 behind the 1 pin serial connection fuse F1 of bridge rectifier modules A D1,3 pin of bridge rectifier modules A D1 connect the input 4.4 of duplicate supply switched voltage protection control unit 4; Connect the output 4.8 of duplicate supply switched voltage protection control unit 4 behind one end of 2 pin of bridge rectifier modules A D1 and the end of connecting resistance R1 and resistance R 2;
The other end of described resistance R 1 and connect the stiff end of potentiometer RT1 and sliding end after connect 10 pin of voltage comparator integrated chip U1, the other end of described resistance R 2 and connect the stiff end of potentiometer RT2 and sliding end after connect 7 pin of voltage comparator integrated chip U1; 4 pin of bridge rectifier modules A D1 and connect another stiff end of potentiometer RT1 and another stiff end of potentiometer RT2 after ground connection;
Connect the input 4.2 of duplicate supply switched voltage protection control unit 4 behind the 1 pin serial connection fuse F2 of bridge rectifier modules A D2,3 pin of bridge rectifier modules A D2 connect the input 4.1 of duplicate supply switched voltage protection control unit 4; Connect the output 4.9 of duplicate supply switched voltage protection control unit 4 behind one end of 2 pin of bridge rectifier modules A D2 and the end of connecting resistance R3 and resistance R 4;
The other end of described resistance R 3 and connect the stiff end of potentiometer RT3 and sliding end after connect 8 pin of voltage comparator integrated chip U1, the other end of described resistance R 4 and connect the stiff end of potentiometer RT4 and sliding end after connect 5 pin of voltage comparator integrated chip U1; 4 pin of bridge rectifier modules A D2 and connect another stiff end of potentiometer RT3 and another stiff end of potentiometer RT4 after ground connection; 4 pin of bridge rectifier modules A D2 are connected with 4 pin of bridge rectifier modules A D1;
4 pin of described voltage comparator integrated chip U1 and connect 9 pin of voltage comparator integrated chip U1 after connect the 2.5V power supply, 6 pin of voltage comparator integrated chip U1 and connect 11 pin of voltage comparator integrated chip U1 after connect the 2.5V power supply, 3 pin of voltage comparator integrated chip U1 connect the 12V power supply, the 12 pin ground connection of voltage comparator integrated chip U1;
Connect 13 pin of voltage comparator integrated chip U1 behind the 7 pin series resistor R5 of described voltage comparator integrated chip U1 and the diode D1,1 pin of voltage comparator integrated chip U1 and connect 13 pin of voltage comparator integrated chip U1 after connect the emitter of NPN type triode N2; Connect 2 pin of voltage comparator integrated chip U1 behind the 5 pin series resistor R6 of voltage comparator integrated chip U1 and the diode D2, connect the port 4.6 of duplicate supply switched voltage protection control unit 4 behind an end of 2 pin of voltage comparator integrated chip U1 and the end of connecting resistance R7, resistance R 8 and 14 pin of voltage comparator integrated chip U1;
Connect the collector electrode of positive-negative-positive triode N1 behind the base stage series resistor R9 of described NPN type triode N2, the negative pole of the collector electrode sending and receiving optical diode LED2 of NPN type triode N2, the positive pole of described LED 2 connect the port 4.7 of duplicate supply switched voltage protection control unit 4;
The emitter of described positive-negative-positive triode N1 connects the 12V power supply, and the base stage of positive-negative-positive triode N1 is connected in series the other end of LED 1 back connecting resistance R7, connects the collector electrode of positive-negative-positive triode N3 after the collector series connection resistance R 10 of positive-negative-positive triode N1 and the resistance R 11; Line ground connection between resistance R 10 and the resistance R 11;
The emitter of described positive-negative-positive triode N3 connects the 12V power supply, and the other end of the base stage connecting resistance R8 of positive-negative-positive triode N3, the collector electrode of positive-negative-positive triode N3 connect the port 4.5 of duplicate supply switched voltage protection control unit 4;
The circuit structure of described current detecting protection output unit 5 is: 1 pin of photoelectrical coupler GDGL3 and connect the end of positive pole, resistance R 21 of 2 pin, the voltage stabilizing didoe KE1 of photoelectrical coupler GDGL4 after connect the input 5.2 of current detecting protection output unit 5,2 pin of photoelectrical coupler GDGL3 and connect 1 pin of photoelectrical coupler GDGL4 and the sliding end of potentiometer RT11 after connect the stiff end of potentiometer RT11; 5 pin of photoelectrical coupler GDGL3 and connect 5 pin of photoelectrical coupler GDGL4 after connect 9 pin of voltage comparator integrated chip U2,4 pin of photoelectrical coupler GDGL3 and 4 pin of photoelectrical coupler GDGL4 also connect back ground connection;
Another stiff end of described potentiometer RT11 and connect the negative pole of voltage stabilizing didoe KE1 after the end of connecting resistance R41; Connect the input of solid-state relay GT6 behind the other end of described resistance R 41 and the connecting resistance R21 other end;
Connect the 12V power supply behind the 9 pin series resistor R20 of described voltage comparator integrated chip U2, connect the 12V power supply behind the 8 pin series resistor R110 of voltage comparator integrated chip U2, ground connection behind the 8 pin series resistor R111 of voltage comparator integrated chip U2,14 pin of voltage comparator integrated chip U2 connect the port 5.3 of current detecting protection output unit 5;
The input 5.1 of the input termination current detecting protection output unit 5 of solid-state relay GT5 connects the output 5.4 that current detecting is protected output unit 5 behind the output serial connection fuse F4 of solid-state relay GT5; The end of the negative pole connecting resistance R22 of solid-state relay GT5, solid-state relay GT5 anodal and connect the positive pole of solid-state relay GT6 after connect the emitter of NPN type triode N6, the positive pole of sending and receiving optical diode LED14 behind the cathode series resistance R55 of solid-state relay GT5;
The end of the negative pole connecting resistance R26 of described solid-state relay GT6, the output 5.5 of the output termination current detecting protection output unit 5 of solid-state relay GT6; Ground connection behind the negative pole of the other end of described resistance R 22 and sending and receiving optical diode LED14 and the other end of resistance R 26;
Connect the 12V power supply behind the collector electrode of described NPN type triode N6 and the end of connecting resistance R25, connect 2 pin of voltage comparator integrated chip U2 behind the base stage series resistor R56 of NPN type triode N6 and the diode D16; The positive pole of another terminating diode D16 of described resistance R 25;
Connect the port 5.3 of current detecting protection output unit 5 behind the base stage series resistor R23 of positive-negative-positive triode N4 and the LED 7, connect the 12V power supply behind the emitter of positive-negative-positive triode N4 and the end of connecting resistance R27, connect the positive pole of diode D15 after the collector series connection resistance R 31 of positive-negative-positive triode N4;
The negative pole of described diode D15 and connect the positive pole of capacitor C 14 and an end of resistance R 29 after connect 4 pin of voltage comparator integrated chip U2; Connect 5 pin of voltage comparator integrated chip U2 behind the end of the other end of described resistance R 27 and connecting resistance R28 and the end of resistance R 39; Ground connection behind the other end of the other end of the negative pole of described capacitor C 14 and connecting resistance R29 and resistance R 28; 2 pin of another termination voltage comparator integrated chip U2 of described resistance R 39;
The 12 pin ground connection of described voltage comparator integrated chip U2,3 pin of voltage comparator integrated chip U2 connect the 12V power supply.
Described first AC power 6 and second AC power 7 are from different two-way AC power; The output 5.4,5.5 of described current detecting protection output unit 5 is the power supply box current output terminal.
The model of above-mentioned solid-state relay GT1, GT2, GT3, GT4, GT5, GT6 is OPTOTRIAC; The model of bridge rectifier modules A D1, AD2 is KBL606; The model of voltage comparator integrated chip U1, U2 is LM339; The model of photoelectrical coupler GDGL3, GDGL4 is 4N25; The model of positive-negative-positive triode N1, N3, N4, N5, N7 is 2N5401; The model of NPN type triode N2, N6 is 2N5551; Above-mentioned DC power source unit 3 is prior art for adopting 5V, 12V switch power module.
The present invention is provided with the dual power supply system of major loop, subloop, automatically switches to stand-by unit when too high in principal voltage, low excessively, when stand-by unit overtension, mistake can realize power-off protection when low; The circuit unit that has the voltage self-recovering function after the quick overcurrent of isolated form, short-circuit protection and the fault elimination by the electronic device realization.
This power supply box has that response speed is fast, precision is high, the characteristics of contactless spark, safe and reliable, adaptation colliery etc. has the place of explosive gas atmosphere, and can be 127V at input voltage, maximum power is not more than the occasion of 180W and uses, and can be widely used in the power supply power supply of various watch-dogs of various important events such as coal mine underground monitoring system, communication system, traffic lights and signal lamp etc.
Claims (1)
1. flame-proof mine duplicate supply Switching power case is characterized in that: comprising: duplicate supply transformer input unit (1), duplicate supply solid-state relay switch unit (2), DC power source unit (3), duplicate supply switched voltage protection control unit (4), current detecting protection output unit (5), first AC power (6) and second AC power (7);
The input 1.1,1.2 of duplicate supply transformer input unit (1) connects first AC power (6), and the input 1.3,1.4 of duplicate supply transformer input unit (1) connects second AC power (7); The output 1.5,1.6,1.7,1.8 of duplicate supply transformer input unit (1) connects the input 2.1,2.2,2.3,2.4 of duplicate supply solid-state relay switch unit (2) respectively; The output 1.9,1.10,1.11,1.12 of duplicate supply transformer input unit (1) connects the input 4.1,4.2,4.3,4.4 of duplicate supply switched voltage protection control unit (4) respectively;
The port 2.5,2.6 of described duplicate supply solid-state relay switch unit (2) connects the port 4.5,4.6 of duplicate supply switched voltage protection control unit (4) respectively, and the output 2.7,2.8 of duplicate supply solid-state relay switch unit (2) connects the input 5.1,5.2 of current detecting protection output unit (5) respectively;
The input of DC power source unit (3) connects the output 4.8,4.9 of duplicate supply switched voltage protection control unit (4);
The port 4.7 of described duplicate supply switched voltage protection control unit (4) connects the port 5.3 of current detecting protection output unit (5);
The circuit structure of described duplicate supply transformer input unit (1) is: input a1, the a2 of transformer T1 connects the input 1.1,1.2 of duplicate supply transformer input unit (1) respectively, and input a3, the a4 of transformer T2 connects the input 1.3,1.4 of duplicate supply transformer input unit (1) respectively; Output b1, the b2 of transformer T1, b3, b4 connect the output 1.5,1.6,1.9,1.10 of duplicate supply transformer input unit (1) respectively, and output b5, the b6 of transformer T2, b7, b8 connect the output 1.7,1.8,1.11,1.12 of duplicate supply transformer input unit (1) respectively;
The circuit structure of described duplicate supply solid-state relay switch unit (2) is: the input of solid-state relay GT1, GT2, GT3, GT4 connects the input 2.2,2.1,2.4,2.3 of duplicate supply solid-state relay switch unit (2) respectively;
The output of solid-state relay GT1 and connect the output of solid-state relay GT3 after connect the output 2.7 of duplicate supply solid-state relay switch unit (2), the output of solid-state relay GT2 and connect the output of solid-state relay GT4 after connect the output 2.8 of duplicate supply solid-state relay switch unit (2);
Solid-state relay GT1 anodal and connect the positive pole of solid-state relay GT2 after connect the 12V power supply, solid-state relay GT3 anodal and connect the positive pole of solid-state relay GT4 after connect the 12V power supply;
Connect the emitter of positive-negative-positive triode N7 behind the negative pole series resistor R34 of solid-state relay GT1 and the LED 3, connect the emitter of positive-negative-positive triode N7 behind the negative pole series resistor R32 of solid-state relay GT2 and the LED 4, connect the emitter of positive-negative-positive triode N5 behind the negative pole series resistor R33 of solid-state relay GT3 and the LED 5, connect the emitter of positive-negative-positive triode N5 behind the negative pole series resistor R30 of solid-state relay GT4 and the LED 6;
The base stage of described positive-negative-positive triode N7 connects the port 2.5 of duplicate supply solid-state relay switch unit (2), connect the port 2.6 of duplicate supply solid-state relay switch unit (2) behind the base stage series resistor R45 of described positive-negative-positive triode N5, the equal ground connection of collector electrode of the collector electrode of positive-negative-positive triode N5 and positive-negative-positive triode N7;
The circuit structure of described duplicate supply switched voltage protection control unit (4) is: connect the input 4.3 of duplicate supply switched voltage protection control unit (4) behind the 1 pin serial connection fuse F1 of bridge rectifier modules A D1,3 pin of bridge rectifier modules A D1 connect the input 4.4 of duplicate supply switched voltage protection control unit (4); Connect the output 4.8 of duplicate supply switched voltage protection control unit (4) behind one end of 2 pin of bridge rectifier modules A D1 and the end of connecting resistance R1 and resistance R 2;
The other end of described resistance R 1 and connect the stiff end of potentiometer RT1 and sliding end after connect 10 pin of voltage comparator integrated chip U1, the other end of described resistance R 2 and connect the stiff end of potentiometer RT2 and sliding end after connect 7 pin of voltage comparator integrated chip U1; 4 pin of bridge rectifier modules A D1 and connect another stiff end of potentiometer RT1 and another stiff end of potentiometer RT2 after ground connection;
Connect the input 4.2 of duplicate supply switched voltage protection control unit (4) behind the 1 pin serial connection fuse F2 of bridge rectifier modules A D2,3 pin of bridge rectifier modules A D2 connect the input 4.1 of duplicate supply switched voltage protection control unit (4); Connect the output 4.9 of duplicate supply switched voltage protection control unit (4) behind one end of 2 pin of bridge rectifier modules A D2 and the end of connecting resistance R3 and resistance R 4;
The other end of described resistance R 3 and connect the stiff end of potentiometer RT3 and sliding end after connect 8 pin of voltage comparator integrated chip U1, the other end of described resistance R 4 and connect the stiff end of potentiometer RT4 and sliding end after connect 5 pin of voltage comparator integrated chip U1; 4 pin of bridge rectifier modules A D2 and connect another stiff end of potentiometer RT3 and another stiff end of potentiometer RT4 after ground connection; 4 pin of bridge rectifier modules A D2 are connected with 4 pin of bridge rectifier modules A D1;
4 pin of described voltage comparator integrated chip U1 and connect 9 pin of voltage comparator integrated chip U1 after connect the 2.5V power supply, 6 pin of voltage comparator integrated chip U1 and connect 11 pin of voltage comparator integrated chip U1 after connect the 2.5V power supply, 3 pin of voltage comparator integrated chip U1 connect the 12V power supply, the 12 pin ground connection of voltage comparator integrated chip U1;
Connect 13 pin of voltage comparator integrated chip U1 behind the 7 pin series resistor R5 of described voltage comparator integrated chip U1 and the diode D1,1 pin of voltage comparator integrated chip U1 and connect 13 pin of voltage comparator integrated chip U1 after connect the emitter of NPN type triode N2; Connect 2 pin of voltage comparator integrated chip U1 behind the 5 pin series resistor R6 of voltage comparator integrated chip U1 and the diode D2, connect the port 4.6 of duplicate supply switched voltage protection control unit (4) behind an end of 2 pin of voltage comparator integrated chip U1 and the end of connecting resistance R7, resistance R 8 and 14 pin of voltage comparator integrated chip U1;
Connect the collector electrode of positive-negative-positive triode N1 behind the base stage series resistor R9 of described NPN type triode N2, the negative pole of the collector electrode sending and receiving optical diode LED2 of NPN type triode N2, the positive pole of described LED 2 connect the port 4.7 of duplicate supply switched voltage protection control unit (4);
The emitter of described positive-negative-positive triode N1 connects the 12V power supply, and the base stage of positive-negative-positive triode N1 is connected in series the other end of LED 1 back connecting resistance R7, connects the collector electrode of positive-negative-positive triode N3 after the collector series connection resistance R 10 of positive-negative-positive triode N1 and the resistance R 11; Line ground connection between resistance R 10 and the resistance R 11;
The emitter of described positive-negative-positive triode N3 connects the 12V power supply, and the other end of the base stage connecting resistance R8 of positive-negative-positive triode N3, the collector electrode of positive-negative-positive triode N3 connect the port 4.5 of duplicate supply switched voltage protection control unit (4);
The circuit structure of described current detecting protection output unit (5) is: 1 pin of photoelectrical coupler GDGL3 and connect the end of positive pole, resistance R 21 of 2 pin, the voltage stabilizing didoe KE1 of photoelectrical coupler GDGL4 after connect the input 5.2 of current detecting protection output unit (5), 2 pin of photoelectrical coupler GDGL3 and connect 1 pin of photoelectrical coupler GDGL4 and the sliding end of potentiometer RT11 after connect the stiff end of potentiometer RT11; 5 pin of photoelectrical coupler GDGL3 and connect 5 pin of photoelectrical coupler GDGL4 after connect 9 pin of voltage comparator integrated chip U2,4 pin of photoelectrical coupler GDGL3 and 4 pin of photoelectrical coupler GDGL4 also connect back ground connection;
Another stiff end of described potentiometer RT11 and connect the negative pole of voltage stabilizing didoe KE1 after the end of connecting resistance R41; Connect the input of solid-state relay GT6 behind the other end of described resistance R 41 and the connecting resistance R21 other end;
Connect the 12V power supply behind the 9 pin series resistor R20 of described voltage comparator integrated chip U2, connect the 12V power supply behind the 8 pin series resistor R110 of voltage comparator integrated chip U2, ground connection behind the 8 pin series resistor R111 of voltage comparator integrated chip U2,14 pin of voltage comparator integrated chip U2 connect the port 5.3 of current detecting protection output unit (5);
The input 5.1 of the input termination current detecting protection output unit (5) of solid-state relay GT5 connects the output 5.4 that current detecting is protected output unit (5) behind the output serial connection fuse F4 of solid-state relay GT5; The end of the negative pole connecting resistance R22 of solid-state relay GT5, solid-state relay GT5 anodal and connect the positive pole of solid-state relay GT6 after connect the emitter of NPN type triode N6, the positive pole of sending and receiving optical diode LED14 behind the cathode series resistance R55 of solid-state relay GT5;
The end of the negative pole connecting resistance R26 of described solid-state relay GT6, the output 5.5 of the output termination current detecting protection output unit (5) of solid-state relay GT6; Ground connection behind the negative pole of the other end of described resistance R 22 and sending and receiving optical diode LED14 and the other end of resistance R 26;
Connect the 12V power supply behind the collector electrode of described NPN type triode N6 and the end of connecting resistance R25, connect 2 pin of voltage comparator integrated chip U2 behind the base stage series resistor R56 of NPN type triode N6 and the diode D16; The positive pole of another terminating diode D16 of described resistance R 25;
Connect the port 5.3 of current detecting protection output unit (5) behind the base stage series resistor R23 of positive-negative-positive triode N4 and the LED 7, connect the 12V power supply behind the emitter of positive-negative-positive triode N4 and the end of connecting resistance R27, connect the positive pole of diode D15 after the collector series connection resistance R 31 of positive-negative-positive triode N4;
The negative pole of described diode D15 and connect the positive pole of capacitor C 14 and an end of resistance R 29 after connect 4 pin of voltage comparator integrated chip U2; Connect 5 pin of voltage comparator integrated chip U2 behind the end of the other end of described resistance R 27 and connecting resistance R28 and the end of resistance R 39; Ground connection behind the other end of the other end of the negative pole of described capacitor C 14 and connecting resistance R29 and resistance R 28; 2 pin of another termination voltage comparator integrated chip U2 of described resistance R 39;
The 12 pin ground connection of described voltage comparator integrated chip U2,3 pin of voltage comparator integrated chip U2 connect the 12V power supply.
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