CN102082410A - Circuit processing system with intrinsically safe explosion-proof function and safety function - Google Patents
Circuit processing system with intrinsically safe explosion-proof function and safety function Download PDFInfo
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- CN102082410A CN102082410A CN2009102497319A CN200910249731A CN102082410A CN 102082410 A CN102082410 A CN 102082410A CN 2009102497319 A CN2009102497319 A CN 2009102497319A CN 200910249731 A CN200910249731 A CN 200910249731A CN 102082410 A CN102082410 A CN 102082410A
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Abstract
The invention relates to a circuit processing system with an intrinsically safe explosion-proof function and a safety function. The system comprises a function safety circuit, a power supply voltage stabilizing circuit, a DC/AC conversion circuit, a first AC/DC conversion circuit, a second AC/DC conversion circuit, a start delay circuit, an intrinsically safe energy limiting circuit, a signal detection circuit, a photoelectric coupler and an isolation transformer, wherein the power supply voltage stabilizing circuit is connected with the DC/AC conversion circuit; the DC/AC conversion circuit is connected with the first AC/DC conversion circuit and the second AC/DC conversion circuit through the isolation transformer respectively; the first AC/DC conversion circuit is connected with the function safety circuit; the second AC/DC conversion circuit is connected with the intrinsically safe energy limiting circuit; the intrinsically safe energy limiting circuit is connected with the start delay circuit; the start delay circuit is connected with the photoelectric coupler; the photoelectric coupler is connected with the signal detection circuit; and the signal detection circuit is connected with the function safety circuit. Compared with the prior art, the system has the advantages of wide input range, safety function and the like.
Description
Technical field
The present invention relates to circuit module, especially relate to a kind of processing of circuit system with intrinsic safe explosion-proof function and functional safety function.
Background technology
Be mainly used in the industries such as petrochemical industry, metallurgy, coal, electric power, natural gas, pharmacy, with supporting uses such as explosion-proof lift in the system, emergency exit, safe gratings, intrinsic safe explosion-proof technology and safe elevator and safe gate systemic-function safe practice are combined, voltage, current energy when having limited work on the one hand in the loop have prevented the generation of blast; On the other hand, its safety circuit with the cut-off signal loop, makes system be in stopped status when fault, has protected field personnel's personal safety.Because the type product access threshold is higher, so the popularization of this patent has vast market prospect.
Summary of the invention
Purpose of the present invention is exactly to provide in order to overcome the defective that above-mentioned prior art exists that a kind of input range is wide, the processing of circuit system with intrinsic safe explosion-proof function and functional safety function of functional safety function.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of processing of circuit system with intrinsic safe explosion-proof function and functional safety function, it is characterized in that, this system comprises the functional safety circuit, power supply stabilization circuit, the DC/AC change-over circuit, the one AC/DC change-over circuit, the 2nd AC/DC change-over circuit, the start delay circuit, intrinsic safety limit energy circuit, signal deteching circuit, photoelectrical coupler, isolating transformer, described power supply stabilization circuit is connected with the DC/AC change-over circuit, described DC/AC change-over circuit by isolating transformer respectively with an AC/DC change-over circuit, the 2nd AC/DC change-over circuit connects, a described AC/DC change-over circuit is connected with the functional safety circuit, described the 2nd AC/DC change-over circuit can be connected by circuit with the intrinsic safety limit, described intrinsic safety limit can be connected with the start delay circuit by circuit, described start delay circuit is connected with photoelectrical coupler, described photoelectrical coupler is connected with signal deteching circuit, and described signal deteching circuit is connected with the functional safety circuit.
Described power supply stabilization circuit comprises filter circuit, DC/DC change-over circuit.
Described photoelectrical coupler is 2.
Described signal deteching circuit is 2.
Described functional safety circuit comprises 3 safety relaies, and this safety relay is the G7SA-2A2B that Omron Corp produces.
Compared with prior art, the present invention has the following advantages:
1, intrinsic safe explosion-proof function
Limited from the control room, place of safety the circuit energy of leading to the hazardous area reliably, prevented that deathtrap damp and dust from blasting because of the circuit spark.
2, functional safety function
The functional safety technology with the cut-off signal loop, makes system be in stopped status when the system failure, has protected field personnel's personal safety reliably.Simultaneously, because the inner safety circuit that multiple redundancy is arranged, itself also has higher reliability.
3, input range is wide
The input signal of this module mainly is a switching mode safety contact signal, and this module has the input detection range of broad, can discern bigger safety contact loop resistance, thereby prolongs the distance in loop, improves the compatibility of system.
5, EMC electromagnetic compatibility anti-interference function
EMC electromagnetic compatibility Anti-Jamming Technique by to circuit parameter research with to the design of PCB circuit board, improves the module anti-jamming capacity, helps adapting to on-the-spot complex electromagnetic environments, has improved the reliability and stability of module.
Description of drawings
Fig. 1 is a kind of structural representation with processing of circuit system of intrinsic safe explosion-proof function and functional safety function of the present invention;
The circuit diagram of the power supply stabilization circuit of the processing of circuit system that Fig. 2 has intrinsic safe explosion-proof function and a functional safety function for the present invention is a kind of;
The circuit diagram of the DC/AC change-over circuit of the processing of circuit system that Fig. 3 has intrinsic safe explosion-proof function and a functional safety function for the present invention is a kind of;
The circuit diagram of the AC/DC change-over circuit of the processing of circuit system that Fig. 4 has intrinsic safe explosion-proof function and a functional safety function for the present invention is a kind of;
The circuit diagram of the start delay circuit of the processing of circuit system that Fig. 5 has intrinsic safe explosion-proof function and a functional safety function for the present invention is a kind of;
Fig. 6 is the circuit diagram that a kind of intrinsic safety with processing of circuit system of intrinsic safe explosion-proof function and functional safety function of the present invention is limit the energy circuit;
The circuit diagram of the signal deteching circuit of the processing of circuit system that Fig. 7 has intrinsic safe explosion-proof function and a functional safety function for the present invention is a kind of;
The circuit diagram of the functional safety circuit of the processing of circuit system that Fig. 8 has intrinsic safe explosion-proof function and a functional safety function for the present invention is a kind of.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, a kind of processing of circuit system with intrinsic safe explosion-proof function and functional safety function, this system comprises functional safety circuit 1, power supply stabilization circuit, DC/AC change-over circuit 4, the one AC/DC change-over circuit 5, the 2nd AC/DC change-over circuit 6, start delay circuit 8, intrinsic safety limit energy circuit 7, signal deteching circuit 9, photoelectrical coupler 10, isolating transformer 11, described power supply stabilization circuit is connected with DC/AC change-over circuit 4, described DC/AC change-over circuit 4 by isolating transformer 11 respectively with an AC/DC change-over circuit 5, the 2nd AC/DC change-over circuit 6 connects, a described AC/DC change-over circuit 5 is connected with functional safety circuit 1, described the 2nd AC/DC change-over circuit 6 can be connected by circuit 7 with the intrinsic safety limit, described intrinsic safety limit can be connected with start delay circuit 8 by circuit 7, described start delay circuit 8 is connected with photoelectrical coupler 10, described photoelectrical coupler 10 is connected with signal deteching circuit 9, and described signal deteching circuit 9 is connected with functional safety circuit 1.Described power supply stabilization circuit comprises filter circuit 2, DC/DC change-over circuit 3.
As shown in Figure 2, power supply stabilization circuit comprises LM317, FZT751, and components and parts such as resistance, electric capacity, inductance are realized for power consumption, high accuracy voltage stabilizing high power DC voltage-stabilizing function.Possible breakdown is: the too high postorder DC/AC modular converter that causes of voltage can not be worked, thereby causes other modules to can not get power supply, quit work; When voltage is too low, the safety relay output module just often-have-electricity, quit work.Complete machine did not quit work when voltage had.
As shown in Figure 3, DC/AC change-over circuit 4 is made of multivibrator CD4047 and 2N7002MOS pipe, resistance, electric capacity and transformer.The fault that may occur is that frequency of oscillation is too high or too low, metal-oxide-semiconductor is damaged and energy can not be coupled to other modules and shut down.
As shown in Figure 4, the AC/DC change-over circuit is made of rectifier diode, voltage-stabiliser tube, triode, electric capacity.The fault that may occur is: the too high fuse F4 that causes of voltage fuses, and interrupt in the input loop, and output module is shut down.During low the or no-voltage of voltage can not work in the input loop, and output module is also shut down.
As shown in Figure 5, start delay circuit 8 is made of electric capacity, diode, resistance, triode, realizes the effect of start process semaphore lock, can not be worked in the input loop, and output module is shut down.The fault that may occur is: during short circuit can not work in the input loop, and output module is shut down; Do not influence the work of other modules during open circuit.
As shown in Figure 6, the intrinsic safety limit can be made of voltage-stabiliser tube, fuse, resistance by circuit 7, prevents that the macro-energy signal scene of sealing in from causing danger.Fuse disconnects when resistive short or voltage-stabiliser tube short circuit, and signal circuit disconnects, and output module is shut down.The loop also disconnects during resistive-open, and output module is shut down.
As shown in Figure 7, signal deteching circuit 9 is made of optocoupler, voltage-stabiliser tube, resistance, fuse, triode, diode.To same input signal, convert the output of 2 tunnel autonomous channels to by 2 light-coupled isolations, amplify the output of driving safety relay through triode.Short circuit of optocoupler output or triode short circuit all can make this passage get voltage; Whether can drive output by relatively back decision of safety relay, if two logical inconsistent then be output as open circuit.
As shown in Figure 8, functional safety circuit 1 is formed malfunction monitoring, contact adhesion arbitration functions by three safety relaies.Three G7SA-2A2B models that safety relay adopts OMROM company to produce.F3 monitors as fault distinguishing, and F1, F2 are main output function.Current path when diode provides solenoid to discharge.Diode open-circuit does not influence relay work, and short circuit then can't be worked, and output is shut down.
Claims (5)
1. processing of circuit system with intrinsic safe explosion-proof function and functional safety function, it is characterized in that, this system comprises the functional safety circuit, power supply stabilization circuit, the DC/AC change-over circuit, the one AC/DC change-over circuit, the 2nd AC/DC change-over circuit, the start delay circuit, intrinsic safety limit energy circuit, signal deteching circuit, photoelectrical coupler, isolating transformer, described power supply stabilization circuit is connected with the DC/AC change-over circuit, described DC/AC change-over circuit by isolating transformer respectively with an AC/DC change-over circuit, the 2nd AC/DC change-over circuit connects, a described AC/DC change-over circuit is connected with the functional safety circuit, described the 2nd AC/DC change-over circuit can be connected by circuit with the intrinsic safety limit, described intrinsic safety limit can be connected with the start delay circuit by circuit, described start delay circuit is connected with photoelectrical coupler, described photoelectrical coupler is connected with signal deteching circuit, and described signal deteching circuit is connected with the functional safety circuit.
2. a kind of processing of circuit system with intrinsic safe explosion-proof function and functional safety function according to claim 1 is characterized in that described power supply stabilization circuit comprises filter circuit, DC/DC change-over circuit.
3. a kind of processing of circuit system with intrinsic safe explosion-proof function and functional safety function according to claim 1 is characterized in that described photoelectrical coupler is 2.
4. a kind of processing of circuit system with intrinsic safe explosion-proof function and functional safety function according to claim 1 is characterized in that described signal deteching circuit is 2.
5. a kind of processing of circuit system with intrinsic safe explosion-proof function and functional safety function according to claim 1 is characterized in that described functional safety circuit comprises 3 safety relaies, and this safety relay is the G7SA-2A2B that Omron Corp produces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102497319A CN102082410A (en) | 2009-12-01 | 2009-12-01 | Circuit processing system with intrinsically safe explosion-proof function and safety function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102497319A CN102082410A (en) | 2009-12-01 | 2009-12-01 | Circuit processing system with intrinsically safe explosion-proof function and safety function |
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| Publication Number | Publication Date |
|---|---|
| CN102082410A true CN102082410A (en) | 2011-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102497319A Pending CN102082410A (en) | 2009-12-01 | 2009-12-01 | Circuit processing system with intrinsically safe explosion-proof function and safety function |
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| CN (1) | CN102082410A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797575A (en) * | 2012-08-28 | 2012-11-28 | 江西直方数控动力有限公司 | Signal isolation plate in electronic control appliance for mine fuel injection |
| CN105438942A (en) * | 2015-12-25 | 2016-03-30 | 上海辰竹仪表有限公司 | Door-control safety type isolation module of anti-explosion elevator |
| CN113037077A (en) * | 2021-03-16 | 2021-06-25 | 中北大学 | Explosion fragment speed measurement target net isolating circuit |
-
2009
- 2009-12-01 CN CN2009102497319A patent/CN102082410A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797575A (en) * | 2012-08-28 | 2012-11-28 | 江西直方数控动力有限公司 | Signal isolation plate in electronic control appliance for mine fuel injection |
| CN105438942A (en) * | 2015-12-25 | 2016-03-30 | 上海辰竹仪表有限公司 | Door-control safety type isolation module of anti-explosion elevator |
| CN113037077A (en) * | 2021-03-16 | 2021-06-25 | 中北大学 | Explosion fragment speed measurement target net isolating circuit |
| CN113037077B (en) * | 2021-03-16 | 2022-06-28 | 中北大学 | Explosion fragment speed measurement target net isolating circuit |
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Application publication date: 20110601 |