CN201234207Y - Portable intrinsically safe electric power - Google Patents
Portable intrinsically safe electric power Download PDFInfo
- Publication number
- CN201234207Y CN201234207Y CNU2008200409615U CN200820040961U CN201234207Y CN 201234207 Y CN201234207 Y CN 201234207Y CN U2008200409615 U CNU2008200409615 U CN U2008200409615U CN 200820040961 U CN200820040961 U CN 200820040961U CN 201234207 Y CN201234207 Y CN 201234207Y
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- circuit
- voltage
- power supply
- intrinsically safe
- portable
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- 230000001681 protective effect Effects 0.000 claims abstract description 14
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 12
- 230000009977 dual effect Effects 0.000 claims description 5
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 239000003245 coal Substances 0.000 abstract description 5
- 238000010892 electric spark Methods 0.000 abstract description 3
- 239000002360 explosive Substances 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000003889 chemical engineering Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 231100001261 hazardous Toxicity 0.000 abstract 1
- 239000003208 petroleum Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
A portable intrinsic safety type power supply is suitable for electronic devices in coal industry, petroleum industry, chemical engineering and the like. The power supply comprises a power supply circuit consisting of a battery module, a DC-DC control circuit and a voltage stabilizing circuit. The battery module provides an input voltage which is then adjusted by the DC-DC control circuit and becomes the voltage required by the normal operation of the an electronic device, and the voltage stabilizing circuit outputs an output voltage with stable magnitude of voltage, low ripple voltage and small ripple current value. An intrinsic safety type protective circuit which is off when an input current/voltage is an overcurrent/ overvoltage is connected with an output end of the voltage stabilizing circuit. A flame proof box does not need to be added outside the power supply; and the portable intrinsic safety type power supply can provide universal standard plus 3.3 V output voltage for electronic devices and electronic monitoring and control systems in the inflammable and explosive environment, and has the advantages of high anti-jamming capability, high reliability, small volume, low cost, convenient carrying and wide practicability. When short circuit, open circuit, and other failure occurs, the energy of electric sparks is not enough to light hazardous gases. Furthermore, the circuit of the power supply has high reliability and anti-jamming capability.
Description
Technical field
The utility model relates to a kind of power supply, especially a kind of portable intrinsically safe power supply that is applicable to that electronic equipments such as coal, oil, chemical industry are used.
Background technology
Because the develop rapidly of industries such as coal, oil, chemical industry needs a large amount of essential safe type electronic equipments that it is carried out environment, personnel's monitoring.In existing electronic equipment, generally adopting storage battery, dry cell and control circuit thereof is the mancarried electronic aid power supply.For dangerous under adverse circumstances, need add Flameproof box to storage battery, the volume of power supply is bigger like this, carry inconvenience, be not suitable for the mobile electron checkout equipment, and the power circuit poor reliability of the dry cell that uses at present, a little less than the anti-interference, can not satisfy the essential safe type requirement.
The utility model content
The purpose of this utility model is the weak point that overcomes in the prior art, and a kind of power circuit reliability height is provided, strong interference immunity, and volume is less, intrinsically safe power supply easy to carry.
For realizing the purpose of this utility model; intrinsically safe power supply of the present utility model comprises the power-supplying circuit that is made of battery module, DC-DC control circuit and voltage stabilizing circuit; provide input voltage by battery module; operate as normal for electronic equipment after the adjustment of this voltage process DC-DC control circuit provides required voltage; through voltage stabilizing circuit output voltage value stabilization, ripple voltage and the less output voltage of ripple current value, connect an essential safe type protective circuit that realizes shutoff during when current overcurrent/overvoltage at the output of voltage stabilizing circuit.
Described essential safe type protective circuit is made of a dual current foldback circuit and a heavy overvoltage crowbar parallel connection; The final output voltage of described essential safe type protective circuit is+3.3V; Described dual current foldback circuit is made of two groups of parallel resistor and the series connection of CMOS integrated chip; Described resistance is 1K Ω, and CMOS integrated chip model is ZXCT1010; Described one heavy overvoltage crowbar is made of diode VD6.
The beneficial effects of the utility model: the scope of application is wide, can be used for coal, oil, fields such as chemical industry, under coal mine, can cancel the Flameproof box that must be located at the power supply outside, be downhole electronics, electronic monitoring and control system provides general standard+3.3V output voltage, antijamming capability is strong, the reliability height, and circuit is short-circuited, when fault such as opening circuit, the electric spark energy shortage is to light dangerous gas, avoided taking the traditional method of Flameproof box, its power circuit reliability height, antijamming capability is strong, volume is little, cost is low, is easy to carry, and has practicality widely.
Description of drawings
Fig. 1 is a portable intrinsically safe power supply circuit block diagram of the present utility model.
Fig. 2 is portable intrinsically safe power supply protective circuit figure of the present utility model.
Embodiment
Below in conjunction with the embodiment in the accompanying drawing the utility model is further described:
Shown in Figure 1, the intrinsically safe power supply of power electronic equipment is made of power-supplying circuit and essential safe type protective circuit two parts.Power-supplying circuit is connected and composed successively by battery module 1, DC-DC control circuit 2, voltage stabilizing circuit 3, provide input voltage by battery module 1, operate as normal for electronic equipment after this voltage is adjusted through DC-DC control circuit 2 provides required burning voltage, through voltage stabilizing circuit 3 output voltage value stabilizations, ripple voltage and the very little output voltage of ripple current value; Protective circuit constitutes the essential safe type protective circuit jointly by the heavy overvoltage protection that the dual current foldback circuit 4 that is in parallel and heavy overvoltage crowbar 5 of connecting and voltage stabilizing circuit 3 provide; for whole power circuit provides " duplicate protection ", for electronic equipment provides intrinsically safe power supply.
Shown in Figure 2, power-supplying circuit connects one and has constituted input filter circuit jointly by resistance R 25, R26 and capacitor C 6, its output connects the Vin pin of a ZXCT1010, the load pin of ZXCT1010 connects the Vin pin of another piece ZXCT1010, and respectively being parallel with detection between the Vin of two ZXCT1010 pin and Load pin is resistance R 22 and the R23 of 1K Ω with resistance; The series connection of the CMOS integrated chip of two groups of parallel connections and resistance realizes duplicate protection, to avoid wherein the inefficacy of the safeguard protection that a slice chip arbitrarily causes entire circuit owing to certain fault causes losing efficacy; With two groups of ZXCT1010 that connect diode VD6 in parallel, the main effect of diode VD6 is the protection that realizes two electric current integrated chips, preventing the too high and defective chip of reverse voltage, thereby realizes a heavy overvoltage protection of circuit; The 10UT pin of two ZXCT1010 is all connected with the resistance R 24, the R27 that are in parallel, to form reference comparison voltages, insert the base stage of triode VT2 through the reference comparison voltages of resistance R 24, the collector electrode of triode VT2 connects one group of RC filter circuit of pressure-stabilizing that is made of R28, C10 parallel connection, the collector electrode of triode VT2 inserts the base stage of triode VT3 behind divider resistance R29 simultaneously, the emitter of the emitter of triode VT3 and triode VT4 all connects the Load pin of second ZXCT1010, to realize the comparison to the electric current formed voltage that ZXCT1010 was monitored; The base stage of triode VT4 inserts the collector electrode of triode VT5, and the base stage of triode VT3 is through the base stage of divider resistance R32 access triode VT5, and the collector electrode of triode VT4 connects output port.
Under the state of power circuit operate as normal, triode VT4, VT5 conducting, directly through triode VT4 output, triode VT2, VT3 are all by not conducting in power supply output, and therefore, protective circuit does not shield; When circuit overcurrent or overvoltage; cause the increase of output current on the power supply lines; chip ZXCT1010 detects the voltage at resistance R 22 two ends; be converted to a certain proportion of output current by external shunt resistor R27 then; this electric current is located through output resistor R24 again; produce reference output voltage; thereby make the base voltage of triode VT2 raise; cause triode VT2 conducting; the collector voltage of triode VT2 also rises along with the rising of collector current so; thereby cause the base current of triode VT3 to increase, triode VT3 realizes conducting, and then the emitter voltage of triode VT4 raises; thereby cause triode VT4 to end; realize turn-offing, then no current voltage output, thus realize protection.
Protective circuit adopts CMOS integrated chip ZXCT1010 as the major control chip; the current monitor of this integrated chip can be measured the voltage at low value sense resistor two ends; can be converted to a certain proportion of output current by external shunt resistor; this electric current is again through the output resistor location, and the generation precision is 1% ground connection reference output voltage.By of the supervision of this integrated chip, realize control, thereby realize overvoltage protection and overcurrent protection the triode switch break-make to output current and voltage.Because the function of overvoltage protection that the control chip LTC1871 inside in the power-supplying circuit is integrated; impedance component with reference to the minimum igniting current in " explosive atmosphere electrical apparatus for explosive atmospheres essential safe type circuit and electric equipment standard ", voltage curve configuration peripheral circuit; moment allows the requirement of the energy of the electric spark that passes through less than 20 μ J when satisfying faults such as intrinsically safe circuit is short-circuited, opens circuit; simultaneously, can ensure the essential safety protection of circuit with the fastest speed energy of releasing.Therefore in protective circuit, only need add a heavy overvoltage protection and double current foldback circuit can be realized essential safety.
Claims (6)
1. portable intrinsically safe power supply; comprise the power-supplying circuit that constitutes by battery module (1), DC-DC control circuit (2) and voltage stabilizing circuit (3); provide input voltage by battery module (1); operate as normal for electronic equipment after this voltage is adjusted through DC-DC control circuit (2) provides required voltage; through voltage stabilizing circuit (3) output voltage value stabilization, ripple voltage and the less output voltage of ripple current value, it is characterized in that: connect a protective circuit that realizes shutoff during when current overcurrent/overvoltage at the output of voltage stabilizing circuit (3).
2. portable intrinsically safe power supply according to claim 1 is characterized in that, described protective circuit is by dual current foldback circuit (4) and a heavy overvoltage crowbar (5) formation in parallel.
3. intrinsically safe power supply according to claim 1 and 2 is characterized in that, the final output voltage of described protective circuit is+3.3V.
4. portable intrinsically safe power supply according to claim 2 is characterized in that, described dual current foldback circuit (4) is by two resistance (R22, R23) formation of connecting with the circuit that two CMOS integrated chips are in parallel respectively.
5. portable intrinsically safe power supply according to claim 4 is characterized in that, described resistance (R22, R23) is 1K Ω, and CMOS integrated chip model is ZXCT1010.
6. portable intrinsically safe power supply according to claim 2 is characterized in that, described one heavy overvoltage crowbar (5) is made of diode VD6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200409615U CN201234207Y (en) | 2008-06-28 | 2008-06-28 | Portable intrinsically safe electric power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200409615U CN201234207Y (en) | 2008-06-28 | 2008-06-28 | Portable intrinsically safe electric power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201234207Y true CN201234207Y (en) | 2009-05-06 |
Family
ID=40620595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200409615U Expired - Fee Related CN201234207Y (en) | 2008-06-28 | 2008-06-28 | Portable intrinsically safe electric power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201234207Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111120002A (en) * | 2019-12-20 | 2020-05-08 | 航天重型工程装备有限公司 | Safe type driving data recorder of essence |
-
2008
- 2008-06-28 CN CNU2008200409615U patent/CN201234207Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111120002A (en) * | 2019-12-20 | 2020-05-08 | 航天重型工程装备有限公司 | Safe type driving data recorder of essence |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090506 Termination date: 20130628 |