CN201412794Y

CN201412794Y - Explosion suppression intrinsically-safe type LED lighting lamp

Info

Publication number: CN201412794Y
Application number: CN2008201832221U
Authority: CN
Inventors: 李孝杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-12-23
Filing date: 2008-12-23
Publication date: 2010-02-24
Anticipated expiration: 2018-12-23

Abstract

The present utility model relating to an improvement of LED explosion-proof lamps for mining and the improved lighting lamps are suitable for illumination for working under a mine or at inflammable and explosive places. The LED lighting lamp consists of a casing, LED lighting diodes and a driving circuit board. The inner of the casing are an explosion suppression chamber and a intrinsically-safe chamber which are divided by a partition sheet and are connected by casing tube binding posts and the intrinsically-safe chamber is protected by a glass cover; the driving circuit board and an introduction of a power supply are in the explosion suppression chamber, and the LED lighting diodes are in the intrinsically-safe chamber are connected in series; the LED lighting diodes in the intrinsically-safe chamber has a small working current and no electric sparks are generated in a short circuit or open circuit situation, therefore, exploration will not occur if the glass cover of the intrinsically-safe chamber breaks, no electric sparks are generated, and the utilization of the explosion suppression intrinsically-safe type LED lighting lamp is safe and reliable in inflammable and explosive places.

Description

A kind of Flameproof intrinsically safe LED illuminating lamp

Technical field

The utility model relates to a kind of improvement of mining LED explosion-proof lamp, and this illuminating lamp is applicable to down-hole, mine or the operating illumination of inflammable and explosive place.

Technical background

The illumination in underground work place, mine at present, generally adopt flame-proof type incandescent lamp, flame-proof type fluorescent lamp or explosion-proof type LED illuminating lamp, though these three kinds of flame-proof type illuminating lamps have solved explosion-proof problem, but also be not suitable for getting working face illumination under the coal mine, its reason is that these three kinds of flame-proof type illuminating lamps use at the down-hole mining working face, easily cause the fragmentation of glass protecting cover, lose the flame proof effect, can cause coal dust, gas explosion because of external impacts such as blowing out.Though being ZL200720147994.5's " a kind of intrinsic safety type cold light source lighting device " patent, the patent No. solved above-mentioned unsafe problems, this lighting device, and each illuminating lamp needs a cable, and it is not too convenient to use.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of simple in structure, easy to use, and volume is little, the luminous efficiency height, and long service life does not produce electric spark, safe and reliable Flameproof intrinsically safe LED illuminating lamp.

The scheme of the utility model technical solution problem is: illuminating lamp of the present utility model is made up of shell, LED light emitting diode group and drive circuit board three parts.Enclosure is divided into explosion-proof chamber and essential safety chamber, and the centre separates with dividing plate, and two chambeies are electrically connected by the conduit connection post, and the essential safety chamber is protected with cloche; Drive circuit board and power supply are introduced and are placed on explosion-proof chamber, and LED light emitting diode group is placed on the essential safety chamber, and the LED light emitting diode adopts positive and negative order to be connected in series; Because the light emitting diode operating current in essential safety chamber is little, can not produce electric spark under the situation of short circuit or open circuit, so the cloche fragmentation in essential safety chamber can not lose quick-friedly, can not produce electric spark, and is safe and reliable in inflammable and explosive place.The electronic circuit board major function is a constant current constant voltage, guarantees under the situation of work, short circuit or open circuit, and the parameter of output current voltage satisfies the requirement of essential safe type, avoids because super-high-current or too high voltages cause coal dust, gas explosion accident.

Because the utility model has adopted such scheme, thereby it is safe and reliable that it is had, and do not produce electric spark, the luminous efficiency height is easy to use, the advantage of long service life.

Description of drawings

For the ease of understanding structural principle of the present utility model and implementing best mode of the present utility model, the utility model is further specified below in conjunction with accompanying drawing.

Fig. 1 is the utility model structure chart

Fig. 2 is the utility model drive circuit board electrical schematic diagram.

In Fig. 1: (1) is the utility model shell, (2) be the explosion-proof chamber of shell, (3) be the essential safety chamber of shell, (4) be the glass protecting cover of shell, (5) be the utility model drive circuit board, (6) be the utility model LED light emitting diode group, (7) are the utility model conduit connection post.

Fig. 2 drive circuit board electrical schematic diagram: by power supply rectification filter circuit, switching power circuit, output rectifier and filter, electric current, voltage negative feedback circuit, LED light emitting diode group is formed.

The specific embodiment

In Fig. 1, power supply input lead and drive circuit board are placed on explosion-proof chamber, LED light emitting diode group is placed on the essential safety chamber, the electric current output in the explosion-proof chamber is connected to the essential safety chamber through the conduit connection post.

Power supply rectification filter circuit in Fig. 2: the ac input end of rectifier bridge ZL (1) pin links to each other with fuse RD one end, the ac input end of rectifier bridge ZL (2) pin links to each other with thermistor RF1 one end, and each other end of fuse RD, thermistor RF1 links to each other with AC power; The dc output end of rectifier bridge ZL (3) pin links to each other with filter capacitor C1, C2 are anodal, resistance R 1, inductance L 1 are connected in parallel, one of them tie point links to each other with the negative pole of capacitor C 1, also link to each other with dc output end (4) pin of rectifier bridge ZL, another tie point of resistance R 1, inductance L 1 parallel circuit links to each other with capacitor C 2 negative poles, foregoing circuit connected and composed power supply rectification filter circuit, be used for direct current to the switching power circuit output smoothing.

Switching power circuit in Fig. 2: (2) pin of pulse transformer T1 links to each other with diode D1 anode, the negative electrode of diode D1 links to each other with a tie point of resistance R 2, capacitor C 3 parallel circuits, another tie point of resistance R 2, capacitor C 3 parallel circuits links to each other with (1) pin of pulse transformer T1, and the overvoltage that has constituted switching power circuit absorbs circuit; Resistance R 2, the tie point of capacitor C 3 and (1) pin of pulse transformer T1 also with power supply rectification filter circuit in capacitor C 1, the anodal tie point of C2 links to each other, (2) pin of pulse transformer T1 also links to each other with the drain lead (5) of Switching Power Supply control chip U1 (TNY256 and TinySwitch-II series) with the tie point of diode D1 anode, the bypass pin (1) of Switching Power Supply control chip U1 links to each other with the source lead (2) of Switching Power Supply control chip U1 through capacitor C 4, this tie point also links to each other with capacitor C 2 negative poles in the power supply rectification filter circuit, also link to each other, constitute switching power circuit common once with (3) pin of photoelectrical coupler U2; The enable pin (4) of Switching Power Supply control chip U1 links to each other with (4) pin of photoelectrical coupler U2, foregoing circuit connected and composed switching power circuit.

Output rectifier and filter in Fig. 2: (3) pin of pulse transformer T1 links to each other with the anode of commutation diode D2, the negative electrode of commutation diode D2 links to each other with filter capacitor C6 is anodal, (4) pin of pulse transformer T1 links to each other with filter capacitor C6 negative pole, this tie point also links to each other with the emitter stage of triode Q1, also link to each other with an end of resistance R 5, the positive pole of filter capacitor C6 also links to each other with an end of inductance L 2, the other end of inductance L 2 links to each other with the positive pole of filter capacitor C7, this tie point is as the cathode output end of drive circuit board, to the anodal power supply of LED light emitting diode group, the negative pole of filter capacitor C7 is as the cathode output end of drive circuit board, power to LED light emitting diode group negative pole, the negative pole of filter capacitor C7 also with electric current, resistance R 6 in the voltage feedback circuit, the tie point of steady two extreme pressure pipe WY links to each other, foregoing circuit connected and composed output rectifier and filter.

Electric current in Fig. 2, voltage feedback circuit: (1) pin of photoelectrical coupler U2 links to each other with commutation diode D2 negative electrode, (2) pin of photoelectrical coupler U2 and resistance R 3, the tie point of resistance R 7 links to each other, the other end of resistance R 3 links to each other with triode Q1 colelctor electrode, the other end of resistance R 7 and resistance R 8, the tie point of Zener diode WY negative electrode links to each other, the other end of resistance R 8 and filter capacitor C6 positive pole, the tie point of inductance L 2 links to each other, Zener diode WY anode and filter capacitor C7 negative pole, the tie point of resistance R 6 one ends links to each other, resistance R 6 other ends and resistance R 5, the tie point of resistance R 4 links to each other, the other end of resistance R 4 links to each other with triode Q1 base stage, the other end of resistance R 5 links to each other with triode Q1 emitter stage, triode Q1 emitter stage also links to each other with capacitor C 5 one ends, the other end of capacitor C 5 links to each other with (3) pin of photoelectrical coupler U2, foregoing circuit connected and composed the current/voltage feedback circuit.

LED light emitting diode group in Fig. 2: be connected in series by the positive and negative order of a plurality of LED light emitting diodes, constitute LED light emitting diode group, the positive pole of LED light emitting diode group is connected on filter capacitor C7 positive terminal, and the negative pole of LED light emitting diode group is connected on filter capacitor C7 negative pole end.

Claims

1. Flameproof intrinsically safe LED illuminating lamp, form by shell, LED light emitting diode group and drive circuit board three parts, housing parts comprises explosion-proof chamber and essential safety chamber, the centre separates with dividing plate, two chambeies are electrically connected by the conduit connection post, and the essential safety chamber is protected with cloche, and drive circuit board and power supply are introduced and be placed on explosion-proof chamber, LED light emitting diode group is placed on the essential safety chamber, and the LED light emitting diode adopts positive and negative order to be connected in series; Drive circuit board is by power supply rectification filter circuit, switching power circuit, and output rectifier and filter, the current/voltage negative-feedback circuit is formed; It is characterized in that: ac input end 1 pin of the rectifier bridge ZL in the power supply rectification filter circuit links to each other with fuse RD one end, ac input end 2 pin of rectifier bridge ZL link to each other with thermistor RF1 one end, and each other end of fuse RD, thermistor RF1 links to each other with AC power; Dc output end 3 pin of rectifier bridge ZL link to each other with filter capacitor C1, C2 positive terminal, dc output end 4 pin of rectifier bridge ZL link to each other with an end of resistance R 1, inductance L 1 parallel circuit tie point, also link to each other with capacitor C 1 negative pole end, the other end of resistance R 1, inductance L 1 parallel circuit links to each other with capacitor C 2 negative poles; 2 pin of pulse transformer T1 in the switching power circuit link to each other with diode D1 anode, the negative electrode of diode D1 links to each other with a tie point of resistance R 2, capacitor C 3 parallel circuits, another tie point of resistance R 2, capacitor C 3 parallel circuits links to each other with 1 pin of pulse transformer T1, and the overvoltage that has constituted switching power circuit absorbs circuit; Resistance R 2, the tie point of capacitor C 3 and 1 pin of pulse transformer T1 also with power supply rectification filter circuit in capacitor C 1, C2 is anodal to link to each other, 2 pin of pulse transformer T1 also link to each other with the drain lead 5 of Switching Power Supply control chip U1 with the tie point of diode D1 anode, Switching Power Supply control chip U1 is TNY256 and TinySwitch-II series, the bypass pin 1 of Switching Power Supply control chip U1 links to each other with an end of capacitor C 4, source lead 2 pin of Switching Power Supply control chip U1 link to each other with the other end of capacitor C 4, this end also with power supply rectification filter circuit in capacitor C 2 negative poles, 3 pin of photoelectrical coupler U2 link to each other, constitute switching power circuit common once, enable pin 4 pin of Switching Power Supply control chip U1 link to each other with 4 pin of photoelectrical coupler U2; 3 pin of pulse transformer T1 in the output rectifier and filter link to each other with the anode of commutation diode D2, the negative electrode of commutation diode D2 links to each other with filter capacitor C6 is anodal, 4 pin of pulse transformer T1 link to each other with filter capacitor C6 negative pole, this tie point also links to each other with the emitter stage of triode Q1, also link to each other with an end of resistance R 5, the positive pole of filter capacitor C6 also links to each other with an end of inductance L 2, the other end of inductance L 2 links to each other with the positive pole of filter capacitor C7, this tie point is as the cathode output end of drive circuit board, to the anodal power supply of LED light emitting diode group, the negative pole of filter capacitor C7 is as the cathode output end of drive circuit board, to LED light emitting diode group negative pole power supply, the negative pole of filter capacitor C7 also with the current/voltage feedback circuit in resistance R 6, the tie point of steady two extreme pressure pipe WY anodes links to each other; 1 pin of photoelectrical coupler U2 in the current/voltage feedback circuit links to each other with commutation diode D2 negative electrode, 2 pin of photoelectrical coupler U2 and resistance R 3, the tie point of resistance R 7 links to each other, the other end of resistance R 3 links to each other with triode Q1 colelctor electrode, the other end of resistance R 7 and resistance R 8, the tie point of Zener diode WY negative electrode links to each other, the other end of resistance R 8 and filter capacitor C6 positive pole, the tie point of inductance L 2 one ends links to each other, Zener diode WY anode and filter capacitor C7 negative pole, the tie point of resistance R 6 one ends links to each other, resistance R 6 other ends and resistance R 5, the tie point of resistance R 4 links to each other, the other end of resistance R 4 links to each other with triode Q1 base stage, the other end of resistance R 5 links to each other with triode Q1 emitter stage, triode Q1 emitter stage also links to each other with capacitor C 5 one ends, and the other end of capacitor C 5 links to each other with 3 pin of photoelectrical coupler U2; Be connected in series by the positive and negative order of a plurality of LED light emitting diodes, constitute LED light emitting diode group, the positive pole of LED light emitting diode group is connected on filter capacitor C7 positive terminal, and the negative pole of LED light emitting diode group is connected on filter capacitor C7 negative pole end.