CN103595033A - Isolating circuit of breakdowns of mining safety barrier - Google Patents
Isolating circuit of breakdowns of mining safety barrier Download PDFInfo
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- CN103595033A CN103595033A CN201310483706.3A CN201310483706A CN103595033A CN 103595033 A CN103595033 A CN 103595033A CN 201310483706 A CN201310483706 A CN 201310483706A CN 103595033 A CN103595033 A CN 103595033A
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- intrinsic safety
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Abstract
The invention discloses a circuit used for isolating breakdowns of a safety barrier of an intrinsic safety power source of an electronic device under a coal mine, and particularly relates to an isolating circuit of breakdowns of a mining safety barrier. The isolating circuit of the breakdowns of the mining safety barrier comprises an intrinsic safety power source providing power for a plurality of intrinsic safety electric devices, wherein the intrinsic safety electric devices are connected to a power supply circuit of the intrinsic safety power source in parallel, and a power supply branch of each intrinsic safety electric device is provided with a constant current limiting circuit capable of limiting a current of the power supply branch. By the adoption of the structure, as the constant current limiting circuits are additionally installed between the intrinsic safety electric devices and the intrinsic safety direct-current power source respectively, when a short circuit occurs on the power supply branch of any intrinsic safety electric device, the constant current limiting circuits will limit the current consumption automatically, overcurrent of the intrinsic safety direct-current power source is avoided, the other intrinsic safety electric devices are not affected and can operate normally, and thus the safety feature of products is improved, and safety and reliability of the products are ensured.
Description
Technical field
The present invention relates to a kind of circuit of isolating for the guard grating fault to the intrinsically safe power supply of electronic equipments under coal mine, specifically a kind of mine safety grid Fault Isolation circuit.
Background technology
The intrinsically safe circuit of underground mine use electricity equipment is different from conventional circuit, it generally includes the safety barrier circuit consisting of high-power mos transistor, if while in use having met with high voltage surge and ringing pulse group's destruction, transistor will breakdownly damage, guard grating there will be fault and lost efficacy, and the parallel connection of general many playscript with stage directions peace power consumption equipments shares an intrinsic safety electric source traditionally, when any playscript with stage directions peace power consumption equipment is loaded excessive or short circuit, other intrinsic safety power consumption equipment that can cause being connected on same intrinsic safety power supply quits work.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of can guarantee that a playscript with stage directions peace power consumption equipment quits work because of short circuit time, the mine safety grid Fault Isolation circuit that other intrinsic safety power consumption equipment can work.
In order to solve the problems of the technologies described above, mine safety grid Fault Isolation circuit of the present invention, comprise the intrinsic safety electric source of energy can be provided for many playscript with stage directions peace power consumption equipments, each playscript with stage directions peace power consumption equipment is connected in parallel in the supply line of this case power supply, on the power supply branch road of every playscript with stage directions peace power consumption equipment, a constant current limiting circuit that can limit this power supply branch current is set respectively.
Described constant current limiting circuit comprises the sample resistance that is connected to intrinsic safety power consumption equipment one end and the electronic switch that is connected to the intrinsic safety power consumption equipment other end, the two ends of described sample resistance are connected with a control circuit, and the output of described control circuit is connected with electronic switch.
Adopt after above-mentioned structure, owing to installing constant current limiting circuit additional between every playscript with stage directions peace power consumption equipment and intrinsic safety DC power supply, when the short circuit of any playscript with stage directions peace power consumption equipment supply line, constant current limiting circuit volitional check current drain, avoid causing intrinsic safety DC power supply overcurrent, thereby guaranteed that other intrinsic safety power consumption equipment can not be affected, and normally carries out work, improve thus the security feature of product, guaranteed the safety and reliability of product.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of mine safety grid Fault Isolation circuit of the present invention;
Fig. 2 is the schematic diagram of constant current limiting circuit in mine safety grid Fault Isolation circuit of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, mine safety grid Fault Isolation circuit of the present invention is described in further detail.
As shown in the figure, mine safety grid Fault Isolation circuit of the present invention, comprise and can provide the intrinsic safety electric source 1 of energy for many (being at least two) intrinsic safety power consumption equipments (load) 2, each playscript with stage directions peace power consumption equipment 2 is connected in parallel in the supply line 3 of this case power supply, on the power supply branch road of every playscript with stage directions peace power consumption equipment 2, a constant current limiting circuit 4 that can limit this power supply branch current is set respectively, wherein constant current limiting circuit 4 comprises the sample resistance 5 that is connected to intrinsic safety power consumption equipment 2 one end and the electronic switch 6 that is connected to intrinsic safety power consumption equipment 2 other ends, the two ends of sample resistance 5 are connected with a control circuit 7, the output of control circuit 7 is connected with electronic switch 6, certainly the constant current limiting circuit 4 in the present invention can be also the equivalent electric circuit of other form.
Its operation principle is as follows:
When load is normal, the pressure drop on sample resistance 5, lower than threshold values, through control circuit 7, makes electronic switch 6 normally open-minded; When load is overweight or during load supplying line short, pressure drop meeting on sample resistance 5 surpasses threshold values, through control circuit 7 outputs, control electronic switch 6 cut-offs, guaranteed that load and circuit current sinking thereof are in limited field, reached thus by constant-current circuit and carried out the fault object of isolation mutually.
Claims (2)
1. a mine safety grid Fault Isolation circuit, it is characterized in that: comprise the intrinsic safety electric source (1) of energy can be provided for many playscript with stage directions peace power consumption equipments (2), each described intrinsic safety power consumption equipment (2) is connected in parallel in the supply line (3) of this case power supply, and a constant current limiting circuit (4) that can limit this power supply branch current is set respectively on the power supply branch road of every described intrinsic safety power consumption equipment (2).
2. according to mine safety grid Fault Isolation circuit claimed in claim 1, it is characterized in that: described constant current limiting circuit (4) comprises the electronic switch (6) that is connected to the sample resistance (5) of intrinsic safety power consumption equipment (2) one end and is connected to intrinsic safety power consumption equipment (2) other end, the two ends of described sample resistance (5) are connected with a control circuit (7), and the output of described control circuit (7) is connected with electronic switch (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310483706.3A CN103595033B (en) | 2013-10-16 | 2013-10-16 | Mine safety grid Fault Isolation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310483706.3A CN103595033B (en) | 2013-10-16 | 2013-10-16 | Mine safety grid Fault Isolation circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103595033A true CN103595033A (en) | 2014-02-19 |
| CN103595033B CN103595033B (en) | 2016-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310483706.3A Active CN103595033B (en) | 2013-10-16 | 2013-10-16 | Mine safety grid Fault Isolation circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN103595033B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452111A (en) * | 2016-11-25 | 2017-02-22 | 山西全安新技术开发有限公司 | Power supply method of intrinsically safe power and intrinsically safe power system |
| CN115450989A (en) * | 2022-11-11 | 2022-12-09 | 中海油田服务股份有限公司 | Fault diagnosis method for underground rotary steering hydraulic system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088248A (en) * | 2010-08-17 | 2011-06-08 | 淮南市长安机电设备有限公司 | Intrinsically safe power supply with high output power |
| CN202178572U (en) * | 2011-08-25 | 2012-03-28 | 北京凯瑟新起点科技发展有限公司 | Flame-proof power supply only generating intrinsic safety type short circuit sparks |
| CN202856433U (en) * | 2012-10-19 | 2013-04-03 | 山西新思备科技有限公司 | Intrinsic safe power supply |
| CN203536948U (en) * | 2013-10-16 | 2014-04-09 | 镇江中煤电子有限公司 | Mining safety barrier fault isolation circuit |
-
2013
- 2013-10-16 CN CN201310483706.3A patent/CN103595033B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088248A (en) * | 2010-08-17 | 2011-06-08 | 淮南市长安机电设备有限公司 | Intrinsically safe power supply with high output power |
| CN202178572U (en) * | 2011-08-25 | 2012-03-28 | 北京凯瑟新起点科技发展有限公司 | Flame-proof power supply only generating intrinsic safety type short circuit sparks |
| CN202856433U (en) * | 2012-10-19 | 2013-04-03 | 山西新思备科技有限公司 | Intrinsic safe power supply |
| CN203536948U (en) * | 2013-10-16 | 2014-04-09 | 镇江中煤电子有限公司 | Mining safety barrier fault isolation circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452111A (en) * | 2016-11-25 | 2017-02-22 | 山西全安新技术开发有限公司 | Power supply method of intrinsically safe power and intrinsically safe power system |
| CN115450989A (en) * | 2022-11-11 | 2022-12-09 | 中海油田服务股份有限公司 | Fault diagnosis method for underground rotary steering hydraulic system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103595033B (en) | 2016-04-20 |
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Address after: No. 101, Nanxu Avenue, Zhenjiang City, Jiangsu Province, 212000 Patentee after: ZHENJIANG ZHONGMEI ELECTRON Co.,Ltd. Address before: Zhenjiang City, Jiangsu province 212016 Guyang Road No. 161 Patentee before: ZHENJIANG ZHONGMEI ELECTRON Co.,Ltd. |
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