CN203775170U - High-voltage explosion-proof switch intrinsic safety pilot circuit with high stability - Google Patents
High-voltage explosion-proof switch intrinsic safety pilot circuit with high stability Download PDFInfo
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- CN203775170U CN203775170U CN201320882145.XU CN201320882145U CN203775170U CN 203775170 U CN203775170 U CN 203775170U CN 201320882145 U CN201320882145 U CN 201320882145U CN 203775170 U CN203775170 U CN 203775170U
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Abstract
The utility model discloses a high-voltage explosion-proof switch intrinsic safety pilot circuit with high stability, and solves a problem of loss of explosion caused by generation of spark in an existing intrinsic safety circuit. The high-voltage explosion-proof switch intrinsic safety pilot circuit comprises an intrinsic safety transformer coil (1) which is connected with a 100V AC power positive electrode input plugging end (A6), an intrinsic safety bridge-type rectification circuit (2), an intrinsic safety filtering and voltage-stabilizing circuit (3), a non-intrinsic safety transformer coil (4) which is connected with a 100V AC power negative electrode input plugging end (A7), a non-intrinsic safety bridge-type rectification circuit (5) and a non-intrinsic safety filtering and voltage-stabilizing circuit (6). Output of the intrinsic safety filtering and voltage-stabilizing circuit (3) passes through photoelectric isolation of a first photoelectric coupler (8), voltage comparator prefabricated voltage bandwidth and second stage photoelectric isolation, and then an intrinsic safety signal is outputted to an intrinsic safety motion switch (12). The simple, reliable, practical and high-stability intrinsic safety pilot circuit is provided for underground coal mines.
Description
Technical field
The present invention relates to the essential safety precursor circuit that a kind of coal mine underground high-voltage explosion-proof switch is used, be suitable under explosive mist condition, having under coal mine the flame-proof switch use of control requirement far away.
Background technology
Under coal mine in explosive mixed-gas environment, to strictly control any electric spark or any thermal effect that high voltage flameproof switch produces, light well shooting gas to prevent it, in order to reach this safe effect, the control circuit of the mined flame-proof switch of existing band control far away is provided with safe precursor circuit control unit, but the unit that existing essential safety precursor circuit is not isolated power circuit mostly and the measure of switch control voltage being carried out to burning voltage, easily make the fluctuation of the electric current and voltage in electric power loop be transmitted in output control circuit, heat accumulation effect, produce electric spark, cause mistake quick-fried, lead to a disaster.
Summary of the invention
The invention provides a kind of high voltage flameproof switch essential safety precursor circuit with high stability, solve the unstable thermal effect accumulation causing of the electric current and voltage because of power supply that existing intrinsically safe circuit exists, cause producing spark in the time that flame-proof switch is far controlled, cause and lose quick-fried technical problem.
The present invention solves above technical problem by the following technical programs:
A kind of high voltage flameproof switch essential safety precursor circuit with high stability, comprise the essential safety transformer coil being connected with the anodal input of 100V AC power inserted terminal, the output of essential safety transformer coil is connected with the input of essential safety bridge rectifier, and the output of essential safety bridge rectifier is connected with the input of essential safety filter regulator circuit; 100V AC power negative pole input inserted terminal is connected with the input of non-intrinsically safe security transformer coil, the output of non-intrinsically safe security transformer coil is connected with the input of the safe bridge rectifier of non-intrinsically safe, and the output of the safe bridge rectifier of non-intrinsically safe is connected with the input of the safe filter regulator circuit of non-intrinsically safe; The output of essential safety filter regulator circuit is connected with the anode input of the first photoelectrical coupler, and the negative electrode input of the first photoelectrical coupler is connected with the negative pole end of the first voltage-stabiliser tube; The collector output of the first photoelectrical coupler is connected with the output end of stabilized voltage supply of the safe filter regulator circuit of non-intrinsically safe, the emitter output of the first photoelectrical coupler is connected with the positive voltage input of voltage comparator, and the output end of stabilized voltage supply of the safe filter regulator circuit of non-intrinsically safe is connected with the negative voltage input of voltage comparator after dividing potential drop; The first output of voltage comparator is connected with the anode input of the second photoelectrical coupler, the negative electrode input of the second photoelectrical coupler is connected with the anode input of the 3rd photoelectrical coupler, the negative electrode input of the 3rd photoelectrical coupler is connected with the second output of voltage comparator, the collector terminal of the second photoelectrical coupler is connected with the positive terminal of the first voltage-stabiliser tube, the negative pole end of the first voltage-stabiliser tube and essential step switch one end be connected, the other end of essential safety step switch is connected with the emitter of the second photoelectrical coupler; The collector electrode of the 3rd photoelectrical coupler is connected with the voltage of voltage regulation output of the safe filter regulator circuit of non-intrinsically safe, the emitter of the 3rd photoelectrical coupler is connected with the base stage of amplifying triode through divider resistance, the collector electrode of amplifying triode is connected with the voltage of voltage regulation output of the safe filter regulator circuit of non-intrinsically safe by a diode, the grounded emitter of amplifying triode.
One end of intrinsically safe circuit relay coil is connected with the voltage of voltage regulation output of the safe filter regulator circuit of non-intrinsically safe, and the other end of intrinsically safe circuit relay coil and the collector electrode of amplifying triode link together.
The present invention in essential safety precursor circuit by photoelectricity isolated location and prefabricated voltage bandwidth circuit by the unstable essential safety voltage and current signal of flame-proof switch, isolation is converted into the essential safety voltage and current signal that meets anti-explosion safety standard with high stability, overcome the thermal effect accumulation of flame-proof switch control circuit, avoid the generation of spark, ensured that down-hole far controls the work safety of flame-proof switch.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail:
A kind of high voltage flameproof switch essential safety precursor circuit with high stability, comprise the essential safety transformer coil 1 being connected with the anodal input of 100V AC power inserted terminal A6, the output of essential safety transformer coil 1 is connected with the input of essential safety bridge rectifier 2, and the output of essential safety bridge rectifier 2 is connected with the input of essential safety filter regulator circuit 3; 100V AC power negative pole input inserted terminal A7 is connected with the input of non-intrinsically safe security transformer coil 4, the output of non-intrinsically safe security transformer coil 4 is connected with the input of the safe bridge rectifier 5 of non-intrinsically safe, and the output of the safe bridge rectifier 5 of non-intrinsically safe is connected with the input of the safe filter regulator circuit 6 of non-intrinsically safe; The output of essential safety filter regulator circuit 3 is connected with the anode input of the first photoelectrical coupler 8, and the negative electrode input of the first photoelectrical coupler 8 is connected with the negative pole end of the first voltage-stabiliser tube 9; The collector output of the first photoelectrical coupler 8 is connected with the output end of stabilized voltage supply of the safe filter regulator circuit 6 of non-intrinsically safe, the emitter output of the first photoelectrical coupler 8 is connected with the positive voltage input of voltage comparator 7, and the output end of stabilized voltage supply of the safe filter regulator circuit 6 of non-intrinsically safe is connected with the negative voltage input of voltage comparator 7 after dividing potential drop; The first output of voltage comparator 7 is connected with the anode input of the second photoelectrical coupler 10, the negative electrode input of the second photoelectrical coupler 10 is connected with the anode input of the 3rd photoelectrical coupler 11, the negative electrode input of the 3rd photoelectrical coupler 11 is connected with the second output of voltage comparator 7, the collector terminal of the second photoelectrical coupler 10 is connected with the positive terminal of the first voltage-stabiliser tube 9, one end of 12 of the negative pole end of the first voltage-stabiliser tube 9 and essential step switch is connected, and the other end of essential safety step switch 12 is connected with the emitter of the second photoelectrical coupler 10; The collector electrode of the 3rd photoelectrical coupler 11 is connected with the voltage of voltage regulation output of the safe filter regulator circuit 6 of non-intrinsically safe, the emitter of the 3rd photoelectrical coupler 11 is connected with the base stage of amplifying triode 13 through divider resistance, the collector electrode of amplifying triode 13 is connected with the voltage of voltage regulation output of the safe filter regulator circuit 6 of non-intrinsically safe by a diode, the grounded emitter of amplifying triode 13.
One end of intrinsically safe circuit relay coil 14 is connected with the voltage of voltage regulation output of the safe filter regulator circuit 6 of non-intrinsically safe, and the collector electrode of the other end of intrinsically safe circuit relay coil 14 and amplifying triode 13 links together.
Make the input terminal voltage of the first photoelectrical coupler 8 not in the time that 2.75-3.5 lies prostrate scope when power supply is unstable, the first photoelectrical coupler 8 is not worked, do not export control signal, now, when the voltage of the positive voltage input of voltage comparator 7 is less than the negative voltage input terminal voltage of voltage comparator 7, the second photoelectrical coupler 10 and the 3rd photoelectrical coupler 11 of connecting at the output of voltage comparator 7 end, make two outputs by the second photoelectrical coupler 10, the current circuit that essence step switch 12 and the first voltage-stabiliser tube 9 form does not have operating current, 12 objects that disconnect of essential step switch are reached, when the input terminal voltage of the first photoelectrical coupler 8 is during in 2.75-3.5 volt scope, the normal output control signal of the first photoelectrical coupler 8,
The positive voltage input terminal voltage of voltage comparator 7 is greater than negative voltage input terminal voltage, make the current circuit being formed by two outputs, essential step switch 12 and first voltage-stabiliser tube 9 of the second photoelectrical coupler 10 have operating current, reached the object of 12 work of essential step switch.
One end of intrinsically safe circuit relay coil 14 is connected with the voltage of voltage regulation output of the safe filter regulator circuit 6 of non-intrinsically safe, the collector electrode of the other end amplifying triode 13 of intrinsically safe circuit relay coil 14 connects, for flame-proof switch provides multiple relay tips.
Claims (2)
1. one kind has the high voltage flameproof switch essential safety precursor circuit of high stability, comprise the essential safety transformer coil (1) being connected with 100V AC power anodal input inserted terminal (A6), the output of essential safety transformer coil (1) is connected with the input of essential safety bridge rectifier (2), and the output of essential safety bridge rectifier (2) is connected with the input of essential safety filter regulator circuit (3), 100V AC power negative pole input inserted terminal (A7) is connected with the input of non-intrinsically safe security transformer coil (4), the output of non-intrinsically safe security transformer coil (4) is connected with the input of the safe bridge rectifier of non-intrinsically safe (5), the output of the safe bridge rectifier of non-intrinsically safe (5) is connected with the input of the safe filter regulator circuit of non-intrinsically safe (6), it is characterized in that, the output of essential safety filter regulator circuit (3) is connected with the anode input of the first photoelectrical coupler (8), the negative electrode input of the first photoelectrical coupler (8) is connected with the negative pole end of the first voltage-stabiliser tube (9), the collector output of the first photoelectrical coupler (8) is connected with the output end of stabilized voltage supply of the safe filter regulator circuit of non-intrinsically safe (6), the emitter output of the first photoelectrical coupler (8) is connected with the positive voltage input of voltage comparator (7), and the output end of stabilized voltage supply of the safe filter regulator circuit of non-intrinsically safe (6) is connected with the negative voltage input of voltage comparator (7) after dividing potential drop, the first output of voltage comparator (7) is connected with the anode input of the second photoelectrical coupler (10), the negative electrode input of the second photoelectrical coupler (10) is connected with the anode input of the 3rd photoelectrical coupler (11), the negative electrode input of the 3rd photoelectrical coupler (11) is connected with the second output of voltage comparator (7), the collector terminal of the second photoelectrical coupler (10) is connected with the positive terminal of the first voltage-stabiliser tube (9), the negative pole end of the first voltage-stabiliser tube (9) is connected with one end of (12) of essential step switch, the other end of essential safety step switch (12) is connected with the emitter of the second photoelectrical coupler (10), the collector electrode of the 3rd photoelectrical coupler (11) is connected with the voltage of voltage regulation output of the safe filter regulator circuit of non-intrinsically safe (6), the emitter of the 3rd photoelectrical coupler (11) is connected with the base stage of amplifying triode (13) by a divider resistance, the collector electrode of amplifying triode (13) is connected with the voltage of voltage regulation output of the safe filter regulator circuit of non-intrinsically safe (6) by a diode, the emitter of amplifying triode (13) and link together.
2. a kind of high voltage flameproof switch essential safety precursor circuit with high stability according to claim 1, it is characterized in that, one end of intrinsically safe circuit relay coil (14) is connected with the voltage of voltage regulation output of the safe filter regulator circuit of non-intrinsically safe (6), and the collector electrode of the other end of intrinsically safe circuit relay coil (14) and amplifying triode (13) links together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320882145.XU CN203775170U (en) | 2013-12-31 | 2013-12-31 | High-voltage explosion-proof switch intrinsic safety pilot circuit with high stability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320882145.XU CN203775170U (en) | 2013-12-31 | 2013-12-31 | High-voltage explosion-proof switch intrinsic safety pilot circuit with high stability |
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| Publication Number | Publication Date |
|---|---|
| CN203775170U true CN203775170U (en) | 2014-08-13 |
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| CN201320882145.XU Expired - Fee Related CN203775170U (en) | 2013-12-31 | 2013-12-31 | High-voltage explosion-proof switch intrinsic safety pilot circuit with high stability |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795382A (en) * | 2013-12-31 | 2014-05-14 | 山西汾西机电有限公司 | High-stability intrinsic safety guide circuit of high-voltage explosion-proof switch |
-
2013
- 2013-12-31 CN CN201320882145.XU patent/CN203775170U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795382A (en) * | 2013-12-31 | 2014-05-14 | 山西汾西机电有限公司 | High-stability intrinsic safety guide circuit of high-voltage explosion-proof switch |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20191231 |
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| CF01 | Termination of patent right due to non-payment of annual fee |