CN102080571A - Flameproof and intrinsically safe voice acousto-optic signal box for coal mine - Google Patents
Flameproof and intrinsically safe voice acousto-optic signal box for coal mine Download PDFInfo
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- CN102080571A CN102080571A CN 201110027260 CN201110027260A CN102080571A CN 102080571 A CN102080571 A CN 102080571A CN 201110027260 CN201110027260 CN 201110027260 CN 201110027260 A CN201110027260 A CN 201110027260A CN 102080571 A CN102080571 A CN 102080571A
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- 239000003245 coal Substances 0.000 title abstract 3
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 6
- 239000005341 toughened glass Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000003381 stabilizer Substances 0.000 claims description 3
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
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Abstract
The invention discloses a flameproof and intrinsically safe voice acousto-optic signal box for a coal mine, which comprises a shell, wherein the shell is internally provided with a power voice power amplifier board; a loudspeaker is arranged outside the shell and connected with the power voice power amplifier board; the top of the shell is provided with a revolving light board which is connected with the power voice power amplifier board; the revolving light board is provided with a revolving light circuit; and a voltage-stabilized source, an intrinsically safe power protection circuit, a programmable voice circuit and a voice power amplifier circuit are connected in sequence and integrated on the power voice power amplifier board. The programmable voice circuit can generate and store a plurality of voice alarm signals, and selects and outputs one voice alarm signal and the revolving light circuit can output cyclic and twinkling light alarm signals or constantly bright light alarm signals, so users can select different acousto-optic alarm modes in different application occasions, thus strengthening an acousto-optic alarm function of the flameproof and intrinsically safe voice acousto-optic signal box for the coal mine.
Description
Technical field
The present invention relates to a kind of signal box, relate in particular to a kind of flame-proof mine intrinsic safety type voice sound and light signal case.
Background technology
The sound and light signal device that use for a long time workplaces such as the lifting of China's coal-mine down-hole, transportation carries out security warning, present sound and light signal device generally comprises a housing, circuit board is installed in the housing, be integrated with sound light alarming circuit on the circuit board, the loudspeaker of sound light alarming circuit and optical signal light are installed on the sidewall of housing, handle is installed on the housing, so that hang the sound and light signal device, yet the sound and light of alarm of existing sound and light signal device is single, can only export single visual alarm and single audible ringing signal.
Summary of the invention
The object of the present invention is to provide the various flame-proof mine intrinsic safety type voice sound and light signal case of a kind of sound and light of alarm.
For achieving the above object; the invention provides a kind of flame-proof mine intrinsic safety type voice sound and light signal case; comprise housing; power supply voice power board is installed in the described housing; described hull outside is equipped with the loudspeaker that is connected with described power supply voice power board; described case top is equipped with the rotation lamp plate that is connected with described power supply voice power board; described rotation lamp plate is provided with the revolving light circuit; be integrated with the voltage-stabilized power supply that connects successively on the described power supply voice power board; the essential safety power protecting circuit; sound circuit able to programme and voice power amplifier; wherein
Described voltage-stabilized power supply is used for 36V or 127V alternating current are transformed into the 12V direct current;
Described essential safety power protecting circuit is used for that described 12V direct current is carried out over-current over-voltage protection and handles, and the 12V direct current after will handling is to described revolving light circuit, described sound circuit able to programme and the power supply of described voice power amplifier;
Described sound circuit able to programme is used to generate and store several audio alert signals, selects one of them audio alert signal output;
Described voice power amplifier, the audio alert signal that is used for selecting carry out exporting described loudspeaker to after power amplifier is handled;
Described revolving light circuit is used to export circulation passage of scintillation light alarm signal or Chang Liangguang alarm signal.
The current rectifying and wave filtering circuit that flame-proof mine intrinsic safety type voice sound and light signal case of the present invention, described voltage-stabilized power supply comprise successively the attaching plug that connects, fuse, step-down transformer, be made of diode D1～D4 and electrochemical capacitor C1 and be the switching mode voltage stabilizing chip of LM2467 and the mu balanced circuit that peripheral circuit constitutes thereof by model.
Flame-proof mine intrinsic safety type voice sound and light signal case of the present invention, described sound circuit able to programme comprises that voltage-stabiliser tube, 4-bit DIP switch, model are speech chip able to programme and the peripheral circuit thereof of WT558D.
Flame-proof mine intrinsic safety type voice sound and light signal case of the present invention, described voice power amplifier comprises that model is voice power amplifier chip and the peripheral circuit thereof of TDA2004.
Flame-proof mine intrinsic safety type voice sound and light signal case of the present invention, described revolving light circuit comprise that model is that the trigger of NE555P and peripheral circuit thereof, model are counter and peripheral circuit, triode QA, QB and QF and several the compound light emitting diodes that is connected of HCF4017.
Flame-proof mine intrinsic safety type voice sound and light signal case of the present invention; described essential safety power protecting circuit comprises by PMOS FET Q5 and Q7; transistor Q1～Q4 and Q6; Zener diode DW1 and DW2; and the overcurrent of sampling resistor R3～R5 formation; overvoltage; short-circuit protection circuit, and by being used to control the light emitting diode circulation flicker of compound connection or the 3rd switch of Chang Liang; being installed in being used on the described housing side controls first switch of single audio alert signal output and is installed in the control circuit that the second switch that is used for the output of continuous speech alarm signal on the described housing side constitutes.
Flame-proof mine intrinsic safety type voice sound and light signal case of the present invention, the bottom of described housing is equipped with mounting base, and the bottom of described mounting base is equipped with handle.
Flame-proof mine intrinsic safety type voice sound and light signal case of the present invention, described rotation lamp plate are provided with the tempered glass translucent cover that the rotation lamp plate is stated in the housing residence.
Flame-proof mine intrinsic safety type voice sound and light signal case of the present invention, described tempered glass translucent cover is provided with protection net outward.
In the flame-proof mine intrinsic safety type voice sound and light signal case of the present invention, because sound circuit able to programme can generate and store several audio alert signals, and select one of them audio alert signal to export, and the revolving light circuit can be exported circulation passage of scintillation light alarm signal or Chang Liangguang alarm signal, under the different application occasion, can select to use different sound and light alarm modes, thereby strengthen the sound and light of alarm of flame-proof mine intrinsic safety type voice sound and light signal case of the present invention for people.
Description of drawings
Fig. 1 is the structure sectional view of flame-proof mine intrinsic safety type voice sound and light signal case of the present invention;
Fig. 2 is the circuit theory diagrams of voltage-stabilized power supply, essential safety power protecting circuit, sound circuit able to programme and voice power amplifier in the power supply voice power board of the present invention;
Fig. 3 is the circuit theory diagrams of revolving light circuit in the rotation lamp plate of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail:
With reference to shown in Figure 1, the flame-proof mine intrinsic safety type voice sound and light signal case of present embodiment, comprise housing 1, power supply voice power board (not drawing among the figure) is installed in the housing 1, housing 1 outside is equipped with the loudspeaker 9 that is connected with power supply voice power board, housing 1 top is equipped with the rotation lamp plate 5 that is connected with power supply voice power board by flange, rotation lamp plate 5 is provided with the tempered glass translucent cover 7 that housing firmly rotates lamp plate 5, the tempered glass translucent cover 7 outer protection nets 9 that are provided with, the bottom of housing 1 is equipped with mounting base 2, the bottom of mounting base 2 is equipped with handle 3, make the flame-proof mine intrinsic safety type voice sound and light signal case of present embodiment both can hang on the equipment such as elevator, also can be installed on the equipment such as elevator by mounting base 2.
In conjunction with shown in Figure 3, rotation lamp plate 5 is provided with the revolving light circuit that is used to export circulation passage of scintillation light alarm signal or Chang Liangguang alarm signal, this revolving light circuit comprises that model is trigger U5 and the peripheral circuit thereof of NE555P, model is counter U6 and the peripheral circuit thereof of HCF4017, triode QA, QB and QF, and the light emitting diode A1～A3 of several compound connections, A1 '～A3 ', B1～B3, B1 '～B3 ', C1～C3, C1 '～C3 ', it is double-deck annular array at rotation lamp plate 5,360 ° of light visual ranges, high-visible in the light visibility 30m, and LED 1～LED3 is a power supply indicator in the revolving light circuit, at light emitting diode A1～A3, A1 '～A3 ', B1～B3, B1 '～B3 ', C1～C3, it extinguished when C1 '～C3 ' worked.
In conjunction with shown in Figure 2, be integrated with the voltage-stabilized power supply 11, essential safety power protecting circuit 12, sound circuit able to programme 13 and the voice power amplifier 14 that connect successively on the power supply voice power board.Wherein:
Voltage-stabilized power supply 11 is used for 36V or 127V alternating current are transformed into the 12V direct current, the current rectifying and wave filtering circuit that it comprises successively the attaching plug P1, the fuse F1 that connect, step-down transformer T, be made of diode D1～D4 and electrochemical capacitor C1 and be the switching mode voltage stabilizing chip U1 of LM2467 and the mu balanced circuit that peripheral circuit constitutes thereof by model.The secondary voltage of step-down transformer T is AC17V; through diode D1～D4, electrochemical capacitor C1 rectifying and wave-filtering; switching mode voltage stabilizing chip U1 voltage stabilizing is DC12V, because switching mode voltage stabilizing chip U1 is the monolithic integrated optical circuit of paster encapsulation, can drive the load of 3A; excellent linearity and load adjustment capability are arranged; its Adjustable Output Voltage joint, its internal oscillator frequency is 150KHz, does not need outer radiation fin; outer member is few, and current-limiting protection and hot turn-off protection are arranged.
Essential safety power protecting circuit 12 is used for that the 12V direct current is carried out over-current over-voltage protection to be handled; and the 12V direct current after will handling is to the revolving light circuit; sound circuit 13 able to programme and 14 power supplies of voice power amplifier; it comprises by PMOS FET Q5 and Q7; transistor Q1～Q4 and Q6; Zener diode DW1 and DW2; and the overcurrent of sampling resistor R3～R5 formation; overvoltage; short-circuit protection circuit; and by the light emitting diode A1～A3 that is used to control compound connection; A1 '～A3 '; B1～B3; B1 '～B3 '; C1～C3; the 3rd K switch 2 (the K2 closed circulation flicker of C1 '～C3 ' circulation flicker or Chang Liang; K2 disconnects Chang Liang); being installed in being used on housing 1 side controls first switch S 1 of single audio alert signal output and is installed in the control circuit that the second switch K1 that is used for the output of continuous speech alarm signal on housing 1 side constitutes, and presses first switch S 1 or closed second switch K1 circuit gets final product operate as normal.Wherein, overcurrent protection is to control triode Q2, Q3 according to the voltage swing of sampling resistor R3, R4, R5; sampling resistor voltage and load current size are proportional; sampling resistor voltage made triode Q2, Q3 conducting when electric current rose to the protection value, thereby control PMOS FET Q5 and Q7 end and reduce load current and realize dualization overcurrent protection.It is that its output voltage 12V can rise to suddenly more than the 16V when switching mode voltage stabilizing chip U1 damages that overvoltage protection protects; at this moment Zener diode DW1 in the essential safety power protecting circuit and DW2 can puncture; lead system triode Q4, Q6 conducting, thereby make PMOS FET Q5 and triode Q6 realize dualization overvoltage protection by cutting off output current.Short-circuit protection is when short circuit appears in load end; triode Q1 is connected on load end because of resistance R 2, diode D6, D7; so triode Q1 base stage forms current loop by resistance R 2, diode D6, D7; triode Q1 conducting makes PMOS FET Q5 and triode Q6 realize short-circuit protection by cutting off output current like this.PMOS FET Q5 and Q7 operate as normal are at the saturation conduction state, and its conduction voltage drop is less than 0.1V, and power consumption is little, do not need outer radiation fin.
And the audio alert signal that voice power amplifier 14 is used for selecting carries out exporting loudspeaker 9 to after power amplifier is handled, and it comprises that model is voice power amplifier chip U4 and the peripheral circuit thereof of TDA2004.This voice power amplifier chip U4 efficient height, power consumption are little, and peak power output 20W can promote 8 Ω 15W horn speakers, and sound is clear loud and clear, sound loudness 〉=90dB.
Above embodiment is described preferred implementation of the present invention; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; various distortion and improvement that the common engineers and technicians in this area make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (9)
1. flame-proof mine intrinsic safety type voice sound and light signal case; comprise housing (1); it is characterized in that; power supply voice power board is installed in the described housing (1); described housing (1) outside is equipped with the loudspeaker (9) that is connected with described power supply voice power board; described housing (1) top is equipped with the rotation lamp plate (5) that is connected with described power supply voice power board; described rotation lamp plate (5) is provided with the revolving light circuit; be integrated with the voltage-stabilized power supply (11) that connects successively on the described power supply voice power board; essential safety power protecting circuit (12); sound circuit able to programme (13) and voice power amplifier (14); wherein
Described voltage-stabilized power supply (11) is used for 36V or 127V alternating current are transformed into the 12V direct current;
Described essential safety power protecting circuit (12), be used for that described 12V direct current is carried out over-current over-voltage protection and handle, and the 12V direct current after will handling is to described revolving light circuit, described sound circuit able to programme (13) and described voice power amplifier (14) power supply;
Described sound circuit able to programme (13) is used to generate and store several audio alert signals, selects one of them audio alert signal output;
Described voice power amplifier (14), the audio alert signal that is used for selecting carry out exporting described loudspeaker (9) to after power amplifier is handled;
Described revolving light circuit is used to export circulation passage of scintillation light alarm signal or Chang Liangguang alarm signal.
2. flame-proof mine intrinsic safety type voice sound and light signal case according to claim 1, it is characterized in that the current rectifying and wave filtering circuit that described voltage-stabilized power supply (11) comprises successively the attaching plug (P1) that connects, fuse (F1), step-down transformer (T), be made of diode D1～D4 and electrochemical capacitor C1 and be the switching mode voltage stabilizing chip (U1) of LM2467 and the mu balanced circuit that peripheral circuit constitutes thereof by model.
3. flame-proof mine intrinsic safety type voice sound and light signal case according to claim 2, it is characterized in that described sound circuit able to programme (13) comprises that voltage-stabiliser tube (U2), 4-bit DIP switch (SW1), model are speech chip able to programme (U3) and the peripheral circuit thereof of WT558D.
4. flame-proof mine intrinsic safety type voice sound and light signal case according to claim 3 is characterized in that, described voice power amplifier (14) comprises that model is voice power amplifier chip (U4) and the peripheral circuit thereof of TDA2004.
5. flame-proof mine intrinsic safety type voice sound and light signal case according to claim 4, it is characterized in that described revolving light circuit comprises that model is that the trigger (U5) of NE555P and peripheral circuit thereof, model are counter (U6) and peripheral circuit, triode QA, QB and QF and several the compound light emitting diodes that is connected (A1～A3, A1 '～A3 ', B1～B3, B1 '～B3 ', C1～C3, C1 '～C3 ') of HCF4017.
6. according to the described flame-proof mine intrinsic safety type of claim 56 voice sound and light signal case; it is characterized in that; described essential safety power protecting circuit (12) comprises by PMOS FET Q5 and Q7; transistor Q1～Q4 and Q6; Zener diode DW1 and DW2; and the overcurrent of sampling resistor R3～R5 formation; overvoltage; short-circuit protection circuit, and by the light emitting diode (A1～A3 that is used to control compound connection; A1 '～A3 '; B1～B3; B1 '～B3 '; C1～C3; C1 '～C3 ') the 3rd switch (K2) of circulation flicker or Chang Liang; be installed in the control circuit that being used on described housing (1) side control first switch (S1) of single audio alert signal output and be installed in second switch (K1) formation that is used for the output of continuous speech alarm signal on described housing (1) side.
7. flame-proof mine intrinsic safety type voice sound and light signal case according to claim 6 is characterized in that the bottom of described housing (1) is equipped with mounting base (2), and the bottom of described mounting base (2) is equipped with handle (3).
8. flame-proof mine intrinsic safety type voice sound and light signal case according to claim 7 is characterized in that, described rotation lamp plate (5) is provided with the tempered glass translucent cover (7) that rotation lamp plate (5) is stated in the housing residence.
9. flame-proof mine intrinsic safety type voice sound and light signal case according to claim 8 is characterized in that, the outer protection net (9) that is provided with of described tempered glass translucent cover (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100272604A CN102080571B (en) | 2011-01-25 | 2011-01-25 | Flameproof and intrinsically safe voice acousto-optic signal box for coal mine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100272604A CN102080571B (en) | 2011-01-25 | 2011-01-25 | Flameproof and intrinsically safe voice acousto-optic signal box for coal mine |
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| Publication Number | Publication Date |
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| CN102080571A true CN102080571A (en) | 2011-06-01 |
| CN102080571B CN102080571B (en) | 2012-11-21 |
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| CN2011100272604A Expired - Fee Related CN102080571B (en) | 2011-01-25 | 2011-01-25 | Flameproof and intrinsically safe voice acousto-optic signal box for coal mine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182514A (en) * | 2011-04-01 | 2011-09-14 | 淮南市智能电器厂 | Mining alarm |
| CN102777211A (en) * | 2012-07-31 | 2012-11-14 | 淮南中煤电子有限责任公司 | Acousto-optic voice alarm device for mine |
| CN102852558A (en) * | 2012-09-20 | 2013-01-02 | 天地（常州）自动化股份有限公司 | Audible and visual alarm with classified voices for mines |
| CN104196570A (en) * | 2014-09-17 | 2014-12-10 | 太原理工大学 | Mining anti-explosion and intrinsic safety ultrasonic ranging and alarming system |
| CN104503334A (en) * | 2014-12-29 | 2015-04-08 | 镇江中煤电子有限公司 | Mining digital coding remotely controlled voice acoustic optical box circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2074365U (en) * | 1990-05-24 | 1991-04-03 | 新泰市碗窑头煤矿 | Safety speech alarm for preventing explosion in mines |
| WO1999056258A1 (en) * | 1998-04-30 | 1999-11-04 | The Government Of The United States Of America As Represented By The Secretary Of The Department Of Health And Human Services | Intrinsically-safe roof hazard alert module |
| CN200989217Y (en) * | 2006-12-08 | 2007-12-12 | 闫明 | Mining flame-proof and intrinsically safe sound alarmer |
| CN201627603U (en) * | 2010-03-06 | 2010-11-10 | 肖公平 | Sound and light alarm circuit |
| CN201635768U (en) * | 2010-01-06 | 2010-11-17 | 青岛天信电气有限公司 | Mine-used intrinsically safe voice alarm |
| CN202039900U (en) * | 2011-01-25 | 2011-11-16 | 淮南市新光源特种照明器材有限公司 | Flameproof and intrinsically safe sound acousticoptical signal box for mine |
-
2011
- 2011-01-25 CN CN2011100272604A patent/CN102080571B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2074365U (en) * | 1990-05-24 | 1991-04-03 | 新泰市碗窑头煤矿 | Safety speech alarm for preventing explosion in mines |
| WO1999056258A1 (en) * | 1998-04-30 | 1999-11-04 | The Government Of The United States Of America As Represented By The Secretary Of The Department Of Health And Human Services | Intrinsically-safe roof hazard alert module |
| CN200989217Y (en) * | 2006-12-08 | 2007-12-12 | 闫明 | Mining flame-proof and intrinsically safe sound alarmer |
| CN201635768U (en) * | 2010-01-06 | 2010-11-17 | 青岛天信电气有限公司 | Mine-used intrinsically safe voice alarm |
| CN201627603U (en) * | 2010-03-06 | 2010-11-10 | 肖公平 | Sound and light alarm circuit |
| CN202039900U (en) * | 2011-01-25 | 2011-11-16 | 淮南市新光源特种照明器材有限公司 | Flameproof and intrinsically safe sound acousticoptical signal box for mine |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182514A (en) * | 2011-04-01 | 2011-09-14 | 淮南市智能电器厂 | Mining alarm |
| CN102182514B (en) * | 2011-04-01 | 2013-10-23 | 淮南市智能电器厂 | Mining alarm |
| CN102777211A (en) * | 2012-07-31 | 2012-11-14 | 淮南中煤电子有限责任公司 | Acousto-optic voice alarm device for mine |
| CN102777211B (en) * | 2012-07-31 | 2014-10-22 | 淮南中煤电子有限责任公司 | Acousto-optic voice alarm device for mine |
| CN102852558A (en) * | 2012-09-20 | 2013-01-02 | 天地（常州）自动化股份有限公司 | Audible and visual alarm with classified voices for mines |
| CN102852558B (en) * | 2012-09-20 | 2014-10-15 | 天地（常州）自动化股份有限公司 | Audible and visual alarm with classified voices for mines |
| CN104196570A (en) * | 2014-09-17 | 2014-12-10 | 太原理工大学 | Mining anti-explosion and intrinsic safety ultrasonic ranging and alarming system |
| CN104196570B (en) * | 2014-09-17 | 2017-02-15 | 太原理工大学 | Mining anti-explosion and intrinsic safety ultrasonic ranging and alarming system |
| CN104503334A (en) * | 2014-12-29 | 2015-04-08 | 镇江中煤电子有限公司 | Mining digital coding remotely controlled voice acoustic optical box circuit |
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| Publication number | Publication date |
|---|---|
| CN102080571B (en) | 2012-11-21 |
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Granted publication date: 20121121 |