CN103595033B - Mine safety grid Fault Isolation circuit - Google Patents
Mine safety grid Fault Isolation circuit Download PDFInfo
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- CN103595033B CN103595033B CN201310483706.3A CN201310483706A CN103595033B CN 103595033 B CN103595033 B CN 103595033B CN 201310483706 A CN201310483706 A CN 201310483706A CN 103595033 B CN103595033 B CN 103595033B
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- power consumption
- consumption equipment
- intrinsic safety
- power supply
- circuit
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Abstract
The invention discloses a kind of circuit of isolating for the guard grating fault of the intrinsically safe power supply to electronic equipments under coal mine, specifically a kind of mine safety grid Fault Isolation circuit.It comprises can provide the intrinsic safety electric source of energy for multiple stage intrinsic safety power consumption equipment, each playscript with stage directions peace power consumption equipment is connected in parallel in the supply line of this case power supply, and the power supply branch road of every playscript with stage directions peace power consumption equipment arranges the constant current limiting circuit that can limit this power supply branch current respectively.After adopting 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 any playscript with stage directions peace power consumption equipment supply line short circuit, constant current limiting circuit volitional check current drain, avoid causing intrinsic safety DC power supply overcurrent, thus ensure that other intrinsic safety power consumption equipment can not be affected, normally carry out work, which thereby enhance the security feature of product, ensure that the safety and reliability of product.
Description
Technical field
The present invention relates to a kind of circuit of isolating for the guard grating fault of the intrinsically safe power supply to electronic equipments under coal mine, specifically a kind of mine safety grid Fault Isolation circuit.
Background technology
The intrinsically safe circuit of underground coal mine electricity consumption equipment is different from conventional circuit, it generally includes the safety barrier circuit be made up of high-power mos transistor, if when in use having met with the destruction of high voltage surge and transient pulse train, transistor will breakdownly damage, guard grating there will be fault and lost efficacy, and general multiple stage intrinsic safety power consumption equipment parallel connection shares an intrinsic safety electric source traditionally, when any playscript with stage directions peace power consumption equipment load is excessive or short circuit time, other intrinsic safety power consumption equipment be connected on same intrinsic safety power supply can be caused to quit work.
Summary of the invention
The technical problem to be solved in the present invention is to provide one can ensure that a playscript with stage directions peace power consumption equipment is when quitting work because of short circuit, the mine safety grid Fault Isolation circuit that other intrinsic safety power consumption equipment can normally work.
In order to solve the problems of the technologies described above, mine safety grid Fault Isolation circuit of the present invention, comprise and can provide the intrinsic safety electric source of energy for multiple stage intrinsic safety power consumption equipment, each playscript with stage directions peace power consumption equipment is connected in parallel in the supply line of intrinsic safety electric source, and the power supply branch road of every playscript with stage directions peace power consumption equipment arranges the constant current limiting circuit that can limit this power supply branch current respectively.
Described constant current limiting circuit comprises the sample resistance being connected to intrinsic safety power consumption equipment one end and the electronic switch being 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.
After adopting 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 any playscript with stage directions peace power consumption equipment supply line short circuit, constant current limiting circuit volitional check current drain, avoid causing intrinsic safety DC power supply overcurrent, thus ensure that other intrinsic safety power consumption equipment can not be affected, normally carry out work, which thereby enhance the security feature of product, ensure that 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, comprising can be the intrinsic safety electric source 1 that multiple stage (being at least two) intrinsic safety power consumption equipment (load) 2 provides energy, each playscript with stage directions peace power consumption equipment 2 is connected in parallel in the supply line 3 of intrinsic safety electric source, the power supply branch road of every playscript with stage directions peace power consumption equipment 2 arranges the constant current limiting circuit 4 that can limit this power supply branch current respectively, wherein constant current limiting circuit 4 comprises the sample resistance 5 being connected to intrinsic safety power consumption equipment 2 one end and the electronic switch 6 being connected to intrinsic safety power consumption equipment 2 other end, 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, constant current limiting circuit 4 in certain the present invention also can be 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 overload or load supplying line short, pressure drop on sample resistance 5 can exceed threshold values, export through control circuit 7 and control electronic switch 6 and end, ensure that load and circuit current sinking thereof are in limited field, reach thus and carry out by constant-current circuit the object that fault isolates mutually.
Claims (1)
1. a mine safety grid Fault Isolation circuit, it is characterized in that: comprising can be the intrinsic safety electric source (1) that multiple stage intrinsic safety power consumption equipment (2) provides energy, each described intrinsic safety power consumption equipment (2) is connected in parallel in the supply line (3) of intrinsic safety electric source, the power supply branch road of intrinsic safety power consumption equipment (2) described in every platform is arranged respectively the constant current limiting circuit (4) that can limit this power supply branch current; Described constant current limiting circuit (4) comprises the sample resistance (5) being connected to intrinsic safety power consumption equipment (2) one end and the electronic switch (6) being 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 CN103595033A (en) | 2014-02-19 |
| CN103595033B true 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) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452111B (en) * | 2016-11-25 | 2020-06-02 | 山西全安新技术开发有限公司 | Power supply method of intrinsic safety power supply and intrinsic safety power supply system |
| CN115450989B (en) * | 2022-11-11 | 2023-02-03 | 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103595033A (en) | 2014-02-19 |
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| SE01 | Entry into force of request for substantive examination | ||
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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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| CP02 | Change in the address of a patent holder |