CN201014390Y

CN201014390Y - Safety type cold light source lighting apparatus

Info

Publication number: CN201014390Y
Application number: CNU2007201479945U
Authority: CN
Inventors: 李孝杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-06
Filing date: 2007-08-06
Publication date: 2008-01-30
Anticipated expiration: 2017-08-06

Abstract

The utility model relates to an improvement of a mine-used explosion-proof illumination lamp which is suitable for working illumination in mine underground or combustible and explosive area, comprising an illumination lamp and an illumination power supply. The illumination lamp utilizes a high brightness LED as a light source and the LED is connected in series; the explosion-proof intrinsically safe type illumination power supply which consists of a commutating and filtering circuit, a steady voltage circuit and a constant current source circuit is used for providing power for the illumination lamp.

Description

A kind of intrinsic safety type cold light source lighting device

Technical field

The utility model relates to a kind of improvement of mining explosion-proof type illuminating lamp, and this lighting device 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 the illumination of explosion-proof type incandescent lamp or luminescent explosion-proof lamp, though this explosion-proof type illuminating lamp has solved explosion-proof problem, but also be not suitable for getting working face under the coal mine, its reason is this explosion-proof type illuminating lamp, use at getting working face, easily cause the fragmentation of glass explosion-resistant enclosure because of external impacts such as blowing out, cause coal dust, gas explosion, so this explosion-proof type illuminating lamp can only be used for underworkings or chamber illumination, also there is the power consumption height in this explosion-proof type illuminating lamp simultaneously, volume is big, light source short shortcoming in service life.

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, and volume is little, the luminous efficiency height, and long service life does not produce spark, safe and reliable intrinsic safety type cold light source lighting device.

The scheme of the utility model technical solution problem is: the utility model is made up of lighting and mains lighting supply two parts, and lighting adopts the high-brightness LED light emitting diode as light source, and mains lighting supply is a Flameproof and intrinsically safe, powers to lighting.The LED light emitting diode adopts and is connected in series, and LED light emitting diode operating current is little, does not under any circumstance produce spark, and is safe and reliable in inflammable and explosive place; The Flameproof and intrinsically safe power supply is powered to a plurality of lightings, in its power supply inside each illuminating lamp current supply circuit is provided with constant-current source circuit, thereby guarantee that LED light emitting diode operating current is constant, make it be operated in optimum state, guarantee also that simultaneously Flameproof and intrinsically safe power output end short circuit current is limited in the intrinsic safety scope, avoid because excessive short circuit current causes coal dust, gas explosion accident.

Because the utility model has adopted such scheme, thereby it is safe and reliable that it is had, simple in structure, volume is little, the luminous efficiency height, and the intrinsic safety electric source output current is constant, and illuminating lamp does not produce advantages such as spark, 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 lighting electrical schematic diagram.

Fig. 2 is the utility model Flameproof and intrinsically safe power sourced electric schematic diagram.

In Fig. 1: LED 1, LED2, LED3 are connected in series, by lamp connection box and explosion-suppression and intrinsic safety The type power supply is connected, and foregoing circuit has connected and composed floodlight circuit of the present utility model.

Flameproof and intrinsically safe power circuit in Fig. 2: by current rectifying and wave filtering circuit, mu balanced circuit and constant-current source circuit form.

Current rectifying and wave filtering circuit in Fig. 2: the winding of transformer B is by the AC power phase of tap from different electric pressures Connect, the Secondary Winding of transformer B is connected with rectifier bridge ZL AC, rectifier bridge ZL DC side positive terminal (+) and electricity Hold the C1 positive terminal and be connected, rectifier bridge ZL DC side negative electricity end (-) is connected the company of foregoing circuit with capacitor C 1 negative pole end Connect and consisted of current rectifying and wave filtering circuit, be used for powering to mu balanced circuit.

Mu balanced circuit in Fig. 2: an end of resistance R 0 is connected with rectifier bridge ZL DC side positive terminal (+), this connection Point also is connected with the drain electrode S of FET BG1, and the other end of resistance R 0 links to each other with integrated regulator U0 input 1 pin Connect, this tie point also is connected with the grid G of FET BG1, output 3 pin and the FET of integrated regulator U0 The source electrode D of BG1 is connected, foregoing circuit connected and composed mu balanced circuit, be used for stablizing its output voltage.

Constant-current source circuit in Fig. 2: each constant-current source circuit is made up of integrated circuit U and resistance R, output 3 pin of integrated circuit U are connected with its 2 pin through resistance R, this tie point is used for to lighting output constant current, input 1 pin of integrated circuit U links to each other with output 3 pin of integrated regulator U0, is powered to constant-current source circuit by mu balanced circuit.Foregoing circuit connected and composed constant-current source circuit.

The specific embodiment

The utility model course of work is as follows:

As shown in Figure 2, winding of transformer and AC power are connected, through the transformer step-down, exchange the side power supply to rectifier bridge ZL, after rectifier bridge ZL rectification, alternating current is become direct current, again through capacitor C1 filtering, to the mu balanced circuit power supply of being made up of integrated regulator U0, FET BG1, resistance R 0, through powering to each constant-current source circuit of being made up of integrated circuit U and resistance R after the mu balanced circuit voltage stabilizing, each constant-current source circuit is exported constant operating current to each lighting; When the short circuit of Flameproof and intrinsically safe power circuit output end, constant-current source circuit limits its output current in the intrinsic safety scope.

Claims

1. an intrinsic safety type cold light source lighting device is made up of lighting and explosion-suppression and intrinsic safety mains lighting supply two parts, and the explosion-suppression and intrinsic safety mains lighting supply is by current rectifying and wave filtering circuit, mu balanced circuit, and constant-current source circuit is formed; It is characterized in that: lighting adopts the series connection of high-brightness LED light emitting diode to connect, and is powered by the constant current of explosion-suppression and intrinsic safety mains lighting supply; Current rectifying and wave filtering circuit in the explosion-suppression and intrinsic safety mains lighting supply: winding of transformer B is connected with the AC power of different electric pressures by tap, the Secondary Winding of transformer B exchanges side with rectifier bridge ZL and is connected, rectifier bridge ZL DC side positive terminal (+) is connected with capacitor C 1 positive terminal, and rectifier bridge ZL DC side negative electricity end (-) is connected with capacitor C 1 negative pole end; Mu balanced circuit in the explosion-suppression and intrinsic safety mains lighting supply: an end of resistance R 0 is connected with rectifier bridge ZL DC side positive terminal (+), this tie point also is connected with the drain electrode S of FET BG1, the other end of resistance R 0 is connected with integrated regulator U0 input 1 pin, this tie point also is connected with the grid G of FET BG1, and output 3 pin of integrated regulator U0 are connected with the source electrode D of FET BG1; Constant-current source circuit in the explosion-suppression and intrinsic safety mains lighting supply: output 3 pin of integrated circuit U are connected with its 2 pin through resistance R, this tie point is used for to lighting output constant current, input 1 pin of integrated circuit U links to each other with output 3 pin of integrated regulator U0, is powered to constant-current source circuit by mu balanced circuit.