CN201682258U - Intrinsic safety type component - Google Patents
Intrinsic safety type component Download PDFInfo
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- CN201682258U CN201682258U CN2010201253796U CN201020125379U CN201682258U CN 201682258 U CN201682258 U CN 201682258U CN 2010201253796 U CN2010201253796 U CN 2010201253796U CN 201020125379 U CN201020125379 U CN 201020125379U CN 201682258 U CN201682258 U CN 201682258U
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Abstract
The utility model relates to an intrinsic safety type component which comprises an intrinsically safe leading circuit for carrying out sampling on an external power supply, wherein a signal processing unit is connected with the intrinsically safe leading circuit for processing a sampled signal and respectively controlling an execution unit and a display unit, the input end of a self-holding unit is connected with the external power supply, the output end is connected with the intrinsically safe leading circuit and used for completing the self-holding action after startup, and a power supply circuit respectively supplies power for the signal processing unit, the display unit and the execution unit. The intrinsically safe leading circuit comprises a double-gate protector which is connected with a secondary of a transformer in parallel, a first current-limiting resistor and a second current-limiting resistor which are sequentially connected with the secondary of the transformer in series, a rectifier bridge connected at the other end of the second current-limiting resistor and a photocoupler connected with the rectifier bridge. The device is very easy to meet the requirements on intrinsic safety performance, and can be stopped immediately if a control cable is in short circuit under the starting state, and avoid the self-startup if the control cable is in the short circuit under the shutdown state; and the intrinsic safety type component can avoid the emergence of the phenomenon of dotting of a relay and avoid damaging on the relay at any time.
Description
Technical field
The utility model belongs to a kind of switch controlling device, particularly relates to a kind of power circuit that comprises, signal processing unit, intrinsic safety guide loop, display unit, performance element and stick unit's essential safe type assembly.
Background technology
Along with the centralization and the maximization of extractive equipment under the coal mine, control technology able to programme (being called for short PLC) has obtained corresponding promotion and application, and increasing down-hole switch has adopted control and the protection of PLC.Because the centralization and the maximization of equipment, the control lead-in wire of starter and control button constantly prolongs, causing this cable to be damaged with the probability of short circuit increases, and again because of having gas and coal dust under the coal mine, requires starter to the circuit of control button must adopt the essential safe type assembly.
At present, the control assembly of a kind of being called " intrinsic safety type control relay " is all selected in the control of the distant place of most of switch for use under the domestic coal mine, this is the product of China last century eight, the nineties, moves when it mainly reaches certain value by the direct current that flows through its first conductance relay.Owing to limited by the common relay operating current, its short circuit current has the shortcoming of non-intrinsically safe safety up to more than the 80mA on the structure.According to interrelated data record, under certain environment, when motor in the running status control cable during by short circuit, contactor can not disconnect, stop button also loses the shutdown effect; When motor during in halted state, when if far electric control cable is by short circuit, because the loop is under the halfwave rectifier state, " self-starting " phenomenon may take place, and no matter whether motor moves, need only electric control cable far away by short circuit, relay all can produce the sharp-pointed noise of getting ready, the contact produces violent shake, and very fast damage.
Summary of the invention
The utility model provides a kind of under open state, if control cable can be shut down by short circuit at once for solving the technical problem that exists in the known technology; Under stopped status, control cable self-starting can not occurred by short circuit; Relay no matter when can not occur and get phenomenon ready, avoid the essential safe type assembly of the damage of relay.
The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is: a kind of essential safe type assembly, comprise power circuit, also be provided with signal processing unit, intrinsic safety guide loop, display unit, performance element and stick unit, wherein, described intrinsic safety guide loop is used for external power source is taken a sample; Described signal processing unit connects intrinsic safety guide loop, sampled signal is handled, and control execution unit is carried out the action of driving, also controlling display unit simultaneously shows, described stick unit's input connects external power source, output connects the self-sustaining action after intrinsic safety guide loop is used to finish startup, and described power circuit provides power supply to signal processing unit, display unit and performance element respectively.
Described intrinsic safety guide loop includes transformer; be connected in parallel on the double grid protector of transformer secondary output; be connected on first current-limiting resistance and second current-limiting resistance of transformer secondary output successively; be connected the rectifier bridge of the second current-limiting resistance other end; and the photoelectrical coupler that links to each other with rectifier bridge, the output of described photoelectrical coupler connects signal processing unit.
The end point in described intrinsic safety guide loop connects the switch of external device (ED) respectively.
Described signal processing unit comprises first operational amplifier that links to each other with the output of intrinsic safety guide loop, by the 14 resistance single-chip microcomputer that links to each other with the output of first operational amplifier and second operational amplifier that links to each other with the output of first operational amplifier by the 13 resistance, the output of described second operational amplifier connects performance element by the 12 resistance, described single-chip microcomputer connects display unit by first resistance, also connects performance element by the 15 resistance.
Described stick unit comprises the rectifier bridge that links to each other with external power source, 2 pin of described rectifier bridge connect the collector electrode of triode, the base stage that also connects triode by the 4th resistance, 4 pin of described rectifier bridge connect voltage stabilizing didoe respectively, diode, the light-emitting diode and first relay, the other end of described voltage stabilizing didoe connects the base stage of triode, the other end of diode connects the emitter of triode, the other end of light-emitting diode connects the emitter of triode by the 3rd resistance, the other end of first relay connects the emitter of triode, and the normally opened contact of first relay connects intrinsic safety guide loop.
Described display unit includes the power supply demonstration, start shows and short circuit shows.
Advantage and the good effect that the utlity model has are: essential safe type assembly of the present utility model, signal processing unit adopt singlechip technology that pilot signal is carried out collection analysis, and send the corresponding action instruction according to analysis result.Because the waveform signal that the guide loop only is responsible for providing a reflection to exist does not have energy requirement,, be easy to satisfy the performance requirement of essential safety so only tens milliamperes of short circuit currents make the intrinsic safety performance be greatly improved.And the present invention is under open state, if control cable can be shut down by short circuit at once; Under stopped status, control cable self-starting can not occurred by short circuit; Relay no matter when can not occur and get phenomenon ready, avoid the damage of relay.The present invention is equipped with " power supply ", " start " and " short circuit " signal shows, when the control cable short circuit, has " short circuit " Presentation Function.In addition, the present invention also has self-sustaining mode very flexibly: can be by the return contact of main contactor, and also available self relay is finished.
Description of drawings
Fig. 1 is a formation block diagram of the present utility model; Fig. 2 is circuit theory diagrams of the present utility model.
Label among the figure is respectively: the 1-signal processing unit; 2-intrinsic safety guide loop; The 3-display unit; The 4-performance element; The 5-power circuit; The 6-stick unit.
Embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, now enumerate following examples, and conjunction with figs. describes in detail of the present utility model as follows: as shown in Figure 1, essential safe type assembly of the present utility model comprises power circuit 5, signal processing unit 1, intrinsic safety guide loop 2, display unit 3, performance element 4 and stick unit 6, wherein, described intrinsic safety guide loop 2 is used for external power source U is taken a sample; Described signal processing unit 1 connects intrinsic safety guide loop 2, sampled signal is handled, and control execution unit 4 is carried out the action of driving, also controlling display unit 3 simultaneously shows, described stick unit's 6 input connects external power source U, output connects the self-sustaining action after intrinsic safety guide loop 2 is used to finish startup, and described power circuit 5 provides power supply to signal processing unit 1, display unit 3 and performance element 4 respectively.
As shown in Figure 2; described intrinsic safety guide loop 2 includes transformer B1; be connected in parallel on the double grid protector W1-W4 of B1 level of transformer; be connected on the first current-limiting resistance R1 and the second current-limiting resistance R2 of B1 level of transformer successively; be connected the rectifier bridge D3 of the second current-limiting resistance R2 other end; and the photoelectrical coupler U2 that links to each other with rectifier bridge D3, the output of described photoelectrical coupler U2 connects signal processing unit 1.End point 1 end, 2 ends in described intrinsic safety guide loop 2 connect the switch that startup connects external device (ED) respectively, and 4 ends are the ground connection leading-out terminal.
The inferior pole tension of transformer B1, is measured at intrinsic safety port one end and 2 ends with the power frequency table after double grid pressure limiting and resistance current limliting for exchanging 44V: its open circuit voltage≤33V, and short circuit current≤13mA, working direct current is not more than 6mA.During operate as normal, 1 end and 2 terminations are gone into the switch of external device (ED), and the electric current that flows through photoelectrical coupler is the direct current half-wave, and during fault, the electric current that flows through photoelectrical coupler is the direct current all-wave.
Described signal processing unit 1 comprises the first operational amplifier U4A that links to each other with 2 outputs of intrinsic safety guide loop, by the 14 resistance R 14 single-chip microcomputer U3 that links to each other with first operational amplifier U4A output and the second operational amplifier U4B that links to each other with first operational amplifier U4A output by the 13 resistance R 13, the output of the described second operational amplifier U4B connects performance element 4 by the 12 resistance R 12, described single-chip microcomputer U3 connects display unit 3 by first resistance R 11, also connects performance element 4 by the 15 resistance R 15.
The electric current that flows through intrinsic safety guide loop 2 is taken a sample through rectifier bridge D3 and photoelectrical coupler U2, obtains voltage signal at 4 pin of photoelectrical coupler U2, after signal processing unit 1 is handled, is communicated with relay K 2 and relay K 3.As long as there is electric current in intrinsic safety guide loop 2, relay K 2 can in time not discharge when there be not electric current with regard to adhesive.Relay K 3 is received when the electric current in guide loop is the direct current half-wave voltage signal, this relay adhesive, and this relay discharges during for direct current all-wave signal, and triode Q5 conducting simultaneously becomes orange colour with power supply indicator by redness, carries out short-circuit alarming and shows.
Described stick unit 6 comprises the rectifier bridge D1 that links to each other with external power source U, 2 pin of described rectifier bridge D1 connect the collector electrode of triode Q1, the base stage that also connects triode Q1 by the 4th resistance R 4,4 pin of described rectifier bridge D1 connect voltage stabilizing didoe W5 respectively, diode V1, the LED and first relay K 1, the other end of described voltage stabilizing didoe W5 connects the base stage of triode Q1, the other end of diode V1 connects the emitter of triode Q1, the other end of LED connects the emitter of triode Q1 by the 3rd resistance R 3, the other end of first relay K 1 connects the emitter of triode Q1, and the normally opened contact of first relay K 1 connects intrinsic safety guide loop 2.
Described display unit 3 comprises that power supply shows that L, start show that K and short circuit show D.
Described performance element 4 comprises relay K 3, relay K 2 and relay K 4, wherein, the coil one termination 24V power supply of relay K 3, the other end connects signal processing unit 1 by triode Q4, the normally opened contact of relay K 3 connects the emitter of triode Q3, one end of relay K 2 coils connects the 24V power supply, the other end is again to connect signal processing unit 1 by triode Q3, the normally opened contact of relay K 2 connects the output port of this device, has only the normally opened contact adhesive of relay K 3, the coil electricity of relay K 2, the normally opened contact adhesive of relay K 2 just can be sent the instruction of driving.
And the coil of the output port of this device by external contactor KM connecting external power source, after the driving instruction is sent, external contactor KM is activated, its return contact is with ac power input end 7 ends and the 6 end short circuits of this device, the coil of relay K 1 gets, the normally opened contact closure of relay K 1 has been finished the self-sustaining work after starting.
Essential safe type assembly of the present utility model has only intercepted a voltage waveform signal from the guide loop, analysis, judgement by single-chip microcomputer draw the instruction of whether sending start.The electric current in its guide loop can be done very lowly.And the final element of essential safe type assembly of the present utility model does not have the directivity requirement.
Claims (6)
1. essential safe type assembly, comprise power circuit (5), it is characterized in that: also be provided with signal processing unit (1), intrinsic safety guide loop (2), display unit (3), performance element (4) and stick unit (6), wherein, described intrinsic safety guide loop (2) is used for external power source (U) is taken a sample; Described signal processing unit (1) connects intrinsic safety guide loop (2), sampled signal is handled, and control execution unit (4) is carried out the action of driving, also controlling display unit (3) simultaneously shows, described stick unit's (6) input connects external power source (U), output connects the self-sustaining action after intrinsic safety guide loop (2) is used to finish startup, and described power circuit (5) provides power supply to signal processing unit (1), display unit (3) and performance element (4) respectively.
2. essential safe type assembly according to claim 1; it is characterized in that: described intrinsic safety guide loop (2) includes transformer (B1); be connected in parallel on the secondary double grid protector (W1-W4) of transformer (B1); be connected on secondary first current-limiting resistance (R1) of transformer (B1) and second current-limiting resistance (R2) successively; be connected the rectifier bridge (D3) of second current-limiting resistance (R2) other end; and the photoelectrical coupler (U2) that links to each other with rectifier bridge (D3), the output of described photoelectrical coupler (U2) connects signal processing unit (1).
3. essential safe type assembly according to claim 1 is characterized in that: the end point in described intrinsic safety guide loop (2) connects the switch of external device (ED) respectively.
4. essential safe type assembly according to claim 1, it is characterized in that: described signal processing unit (1) comprises first operational amplifier (U4A) that links to each other with intrinsic safety guide loop (2) output, by the 14 resistance (R14) single-chip microcomputer (U3) that links to each other with first operational amplifier (U4A) output and second operational amplifier (U4B) that links to each other with first operational amplifier (U4A) output by the 13 resistance (R13), the output of described second operational amplifier (U4B) connects performance element (4) by the 12 resistance (R12), described single-chip microcomputer (U3) connects display unit (3) by first resistance (R11), also connects performance element (4) by the 15 resistance (R15).
5. essential safe type assembly according to claim 1, it is characterized in that: described stick unit (6) comprises the rectifier bridge (D1) that links to each other with external power source (U), 2 pin of described rectifier bridge (D1) connect the collector electrode of triode (Q1), the base stage that also connects triode (Q1) by the 4th resistance (R4), 4 pin of described rectifier bridge (D1) connect voltage stabilizing didoe (W5) respectively, diode (V1), light-emitting diode (LED) and first relay (K1), the other end of described voltage stabilizing didoe (W5) connects the base stage of triode (Q1), the other end of diode (V1) connects the emitter of triode (Q1), the other end of light-emitting diode (LED) connects the emitter of triode (Q1) by the 3rd resistance (R3), the other end of first relay (K1) connects the emitter of triode (Q1), and the normally opened contact of first relay (K1) connects intrinsic safety guide loop (2).
6. essential safe type assembly according to claim 1 is characterized in that: described display unit (3) includes power supply and shows that (L), start show that (K) and short circuit show (D).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201253796U CN201682258U (en) | 2010-03-09 | 2010-03-09 | Intrinsic safety type component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201253796U CN201682258U (en) | 2010-03-09 | 2010-03-09 | Intrinsic safety type component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201682258U true CN201682258U (en) | 2010-12-22 |
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ID=43347291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201253796U Expired - Lifetime CN201682258U (en) | 2010-03-09 | 2010-03-09 | Intrinsic safety type component |
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| Country | Link |
|---|---|
| CN (1) | CN201682258U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826714A (en) * | 2010-03-09 | 2010-09-08 | 天津市天矿电器设备有限公司 | Intrinsically-safe type control device |
| CN103191539A (en) * | 2013-03-07 | 2013-07-10 | 上海松江飞繁电子有限公司 | Multi-line control device and method related to fire-fighting interlocking equipment |
-
2010
- 2010-03-09 CN CN2010201253796U patent/CN201682258U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826714A (en) * | 2010-03-09 | 2010-09-08 | 天津市天矿电器设备有限公司 | Intrinsically-safe type control device |
| CN101826714B (en) * | 2010-03-09 | 2012-07-25 | 天津市天矿电器设备有限公司 | Intrinsically-safe type control device |
| CN103191539A (en) * | 2013-03-07 | 2013-07-10 | 上海松江飞繁电子有限公司 | Multi-line control device and method related to fire-fighting interlocking equipment |
| CN103191539B (en) * | 2013-03-07 | 2015-06-17 | 上海松江飞繁电子有限公司 | Multi-line control device and method related to fire-fighting interlocking equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101222 Effective date of abandoning: 20120725 |