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A flameproof and intrinsically safe local fan motor switch alarm assembly

A switch and local fan technology, applied in electrical components, circuit devices, emergency power supply arrangements, etc., can solve the problem of inability to distinguish the cause of the local fan shutdown failure, inability to distinguish the real source of the failure, increasing costs and equipment maintenance, etc. Achieve the effect of shortening troubleshooting time, saving procedures and workload, and eliminating procedures

Active Publication Date: 2018-04-03
HUAINAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, in this invention, if the switch trips due to a damaged relay, it will also cause the alarm circuit to work, and it is impossible to distinguish the real source of the fault. In this invention, in order to ensure the reliability of the alarm power supply, the power supply of the local fan switch itself is not used. It adopts the external 127V lighting power supply of the switch, which increases the cost and equipment maintenance
In "Development of Monitoring and Alarm Device for Local Fan Power Failure and Wind Stop" (Zhang Xubo, Li Yongjun, Guo Fangxing, Zhao Guoming, Cui Zhonghe, Wang Wenyi published in Practical Technology No. 185), a sensor is set at the local fan duct, and the local fan duct stops the wind , the alarm will give an alarm prompt, but this technical solution cannot distinguish the cause of the failure of the local fan, and this technical solution, like other existing technologies, uses an external power supply to power the alarm

Method used

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  • A flameproof and intrinsically safe local fan motor switch alarm assembly
  • A flameproof and intrinsically safe local fan motor switch alarm assembly
  • A flameproof and intrinsically safe local fan motor switch alarm assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Before the local fan is ventilated, switch K1 and switch K2 are in the off state. After confirming that the local fan can be ventilated, close the isolation switch GHK, and the voltage of 1140V / 660V is added to the primary winding of the transformer BK through the voltage level selection terminal SW and the fuse FU. The first and secondary windings of the transformer sense 36V AC voltage, and the voltage is applied to both ends of the internal relay of the protector between pin 9 of the protection node and pin 4 of the protection node through wire 9# and wire 5#, and the internal relay coil of the protector is Electricity, between pin 4 of the protection node and pin 3 of the protection node is changed from normally open to normally closed, the 3 pin of the protection node of the intelligent protector JDB is connected with the A8 pin of the pilot plug-in XDJ through the 6# wire, and the other wire of the 9# wire is connected Insert the B8 pin of the pilot plug-in, so tha...

Embodiment 2

[0042] Before the local fan is ventilated, switch K1 and switch K2 are in the off state. After confirming that the local fan can be ventilated, close the isolation switch GHK, and the voltage of 1140V / 660V is added to the primary winding of the transformer BK through the voltage level selection terminal SW and the fuse FU. The first and secondary windings of the transformer sense 36V AC voltage, and the voltage is applied to both ends of the internal relay of the protector between pin 9 of the protection node and pin 4 of the protection node through wire 9# and wire 5#, and the internal relay coil of the protector is Electricity, between pin 4 of the protection node and pin 3 of the protection node is changed from normally open to normally closed, the 3 pin of the protection node of the intelligent protector JDB is connected with the A8 pin of the pilot plug-in XDJ through the 6# wire, and the other wire of the 9# wire is connected Insert the B8 pin of the pilot plug-in, so tha...

Embodiment 3

[0044] Before the local fan is ventilated, switch K1 and switch K2 are in the off state. After confirming that the local fan can be ventilated, close the isolation switch GHK, and the voltage of 1140V / 660V is added to the primary winding of the transformer BK through the voltage level selection terminal SW and the fuse FU. The first and secondary windings of the transformer sense 36V AC voltage, and the voltage is applied to both ends of the internal relay of the protector between pin 9 of the protection node and pin 4 of the protection node through wire 9# and wire 5#, and the internal relay coil of the protector is Electricity, between pin 4 of the protection node and pin 3 of the protection node is changed from normally open to normally closed, the 3 pin of the protection node of the intelligent protector JDB is connected with the A8 pin of the pilot plug-in XDJ through the 6# wire, and the other wire of the 9# wire is connected Insert the B8 pin of the pilot plug-in, so tha...

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PUM

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Abstract

The invention discloses a flame-proof and intrinsically safe local fan motor switch warning assembly, belonging to the field of underground ventilation. The flame-proof and intrinsically safe local fan motor switch warning assembly comprises a local fan motor switch part and a warning indication part, wherein the local fan motor switch part comprises a transformer BK; the primary winding leading-out terminal of BK is connected with a voltage class choice terminal SW in series, and then is connected with a local fan motor main circuit in parallel; the leading-out terminal of the first secondary winding M1 of BK is connected with local fan motor switch double safety circuits; the warning indication part comprises a warning indication circuit; a second secondary winding M2 is additionally arranged on BK; the second secondary winding M2 supplies power to the warning indication circuit; one leading-out terminal of M2 is divided into three paths; the three paths are connected with the other leading-out terminal of M2 to form loops which are connected in parallel; and the loops are separately connected with an indicator lamp HR1, normally-closed switches of contactors, indicator lamps and audible and visual alarms of the two switch safety circuits. The flame-proof and intrinsically safe local fan motor switch warning assembly can supply power to related indication and alarming devices; no other powers need to be additionally arranged; and the source of a failure can be rapidly, simply and conveniently determined preliminarily after the failure happens.

Description

technical field [0001] The invention belongs to the field of underground local ventilation, and more specifically relates to a flameproof and intrinsically safe local fan motor switch alarm assembly. Background technique [0002] Gas gushing out from coal walls and goafs is the root cause of mine gas disasters. Since coal mine production must continue, continuous gas gushing out is inevitable. In order to ensure production safety, the "Coal Mine Safety Regulations" stipulates that the production level and the mining area must be ventilated by partition; the mining and excavation face should be ventilated independently; the tunnel must be ventilated by full wind pressure or local ventilator. Ventilation system is the center of mine safety management. First of all, ventilation plays an important role in gas management. Local ventilation constitutes the safety foundation of the entire mine production. Mining and excavation face is the most important production link in the mine,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/18E21F1/00H02J9/06
CPCE21F1/006E21F17/18H02J9/061
Inventor 权循忠吴琰廖晓纬
Owner HUAINAN NORMAL UNIV
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