CN2748774Y

CN2748774Y - Double return circuit explosion-proof mining lamp holder

Info

Publication number: CN2748774Y
Application number: CNU200420080753XU
Authority: CN
Inventors: 毛传礼; 石富江
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-10-30
Filing date: 2004-10-30
Publication date: 2005-12-28
Anticipated expiration: 2014-10-30

Abstract

The utility model relates to a double return circuit explosion-proof mining lamp holder, characterized in that a double return circuit bulb is adopted, and provided with two interdependent filament circuits. The utility model is provided with a double return change-over switch and a sliding type lamp base. A spring is arranged between the lamp base and a lamp shell. The bulb fixed in the lamp base is pressed on a protective glass. The end part contact of the bulb holder jumper connects with a conductive spring piece. A heat-sensitive aggregation switch is arranged in the power supply circuit. The heat-sensitive aggregation switch and the double return change-over switch are both fixed and sealed in the lamp shell. The utility model is of an explosion-proof type, and has the function of short circuit and over-current protection. The double return circuit explosion-proof mining lamp holder has double return switchable operation, and greatly improves the reliability of the mining lamp holder; the underground operation is safer.

Description

The explosion-proof Mine lamp cap in double loop

Technical field:

The utility model relates to lighting device, the mine lighting equipment of a kind of use at mine, tunnel, cavern of more specifically saying so.

Background technology:

Mine, tunnel and cavern operating personnel need continuously reliably illumination, particularly contain under the occasion of explosive substances such as gas, methane, dust in the colliery etc., not only need continuous illumination, also need strict explosion precaution simultaneously.But existing mine lamp has only a power for illumination loop, and the bulb monofilament is fragile, and short circuit current is big, no short circuit overcurrent protection, and short trouble is enough to make gas explosion.

Summary of the invention:

The utility model is for avoiding the existing weak point of above-mentioned prior art, provide a kind of double loop explosion-proof Mine lamp cap, by improving the reliability of Mine lamp cap, making underground work safer.

The technical scheme that the utility model technical solution problem is adopted is:

Design feature of the present utility model is:

A, employing double loop bulb, described double loop bulb has two groups of separate filament loops, and the double loop change-over switch is set;

B, the slidingtype lamp socket is set, between lamp socket and the lamp housing spring is set, the bulb that is fixed in the lamp socket is pressed on the cover plate, and lamp holder afterbody contact and conducting strip contact are jumper connection;

C, in the power supply loop, the thermally sensitized polymerization switch is set, described thermally sensitized polymerization switch and double loop change-over switch all are enclosed in the lamp housing admittedly.

Compared with the prior art, the utlity model has following beneficial effect:

1, the utlity model has two groups of power for illumination loops, after blow in a certain group of loop in two groups of loops, can directly switch to another group and devote oneself to work, greatly improve the functional reliability of mining lamp.

2, the utility model setting has the thermally sensitized polymerization switch of short circuit overcurrent defencive function, when electric loop is short-circuited, can cut off the electricity supply immediately, makes lead impedance infinity, avoids occurring the short circuit naked light.

3, change-over switch in the utility model and thermally sensitized polymerization switch all are enclosed in the lamp housing admittedly, have good explosion-proof function.

4, the utility model adopts spring jumper connection structure between lamp socket and lamp housing, when bulb is broken, and merit deenergizing immediately.

5, the utility model power supply versatility is good, can adopt lead-acid battery, lithium battery or Ni-MH battery,

6, its simple in structure, compact dimensions of the utility model is in light weight, wears conveniently.

Description of drawings:

Accompanying drawing is the utility model structural representation.

Number in the figure: 1 bulb, 2 lamp housings, 3 lamp sockets, 4 springs, 5 reflector lamp bowls, 6 sealing gaskets, 7 cover plates, 8 light covers, 9 conductive reeds, 10 change-over switches, 11 sealing rings, 12 thermally sensitized polymerization switches, 13 hooks, 14 wiring holes.

The specific embodiment:

Referring to accompanying drawing, in the present embodiment, adopt double loop bulb 1, double loop bulb 1 has two groups of separate filament loops, change-over switch 10, two groups of filament loops in double loop is set by change-over switch 10 selection work.After wherein a loop is blown, can directly switches to the another loop by change-over switch 10 and continue to keep normal illumination.

As shown in the figure, sleeve type lamp socket 3 is set, this lamp socket 3 slides in the lamp housing 2, and and lamp housing 2 between be provided with spring 4, the bulb 1 that is fixed in the lamp socket 3 is pressed on the cover plate 7, and lamp holder 1 afterbody contact and conductive reed 9 are jumper connection, and the periphery of bulb 1 is a reflector lamp bowl 5.Constitute sealed type lampshade by lamp housing 2, cover plate 7 and light cover 8.Because of compressing of cover plate 7, the contact switch that bulb 1 afterbody contact and conductive reed 9 form is on-state; In case the glass bulb fragmentation of bulb 1, under the effect of spring 4, lamp socket 3 is to front slide, the contact switch that its afterbody contact and conductive reed 9 form promptly in opened condition, thereby when bulb glass is broken, cut off the electricity supply immediately.During concrete enforcement, spring 4 can be cylindrical screw formula, trochoid spiral formula or plate-sheet-type, and cover plate 7 can be glass, crystal, crystalline ceramics, lucite or transparent plastic etc.

Shown in the figure, in the power supply loop, thermally sensitized polymerization switch 12 is set, thermally sensitized polymerization switch 12 and double loop change-over switch 10 all are enclosed in the lamp housing 2 admittedly, form blast resistance construction.In order to guarantee the sealing property of this blast resistance construction, can on region of interest, be included between cover plate 7, lamp housing 2 and the light cover 8 sealing gasket 6 is set, and between selector switch 10 and lamp housing 2, sealing ring 11 etc. is set.

Thermally sensitized polymerization switch 12 is made up of polymer resin and conducting particles, and the size of its impedance is relevant with the height of temperature.Under the normal temperature state, conducting particles forms crystalloid low resistance chain link in polymer; When temperature rises, and when surpassing switching threshold, the crystalloid chain link is destroyed, becomes gluey amorphous state, and conducting particles is separated from polymer, the impedance of galvanic circle is risen, until being blocked.

When normal illumination, the lighting current in the circuit is also little, and it is less to produce heat, and thermally sensitized polymerization switch 12 is in the normal temperature state, and its impedance is little, can not destroy the power for illumination path; In case short trouble occurs, produce very big short circuit current, thermally sensitized polymerization switch 12 is heated and the temperature rising, and its impedance is also sharply increased, blocking-up power for illumination path, thus short-circuit protection is provided.After fault was excluded, along with the reduction of temperature, the conduction chain link of thermally sensitized polymerization formed again, and its impedance descends, and finishes automatic reparation.This performance applications of thermally sensitized polymerization switch is reached in present embodiment the short circuit overcurrent protection of circuit and the function that can repair automatically.

For the ease of it is worn on the safety cap, at the back of lamp housing 2 hook 13 should be set, have wiring hole 14 on the sidewall of lamp housing 2.

The utility model is suitable for multiple power supply, comprises lead-acid battery, lithium battery or Ni-MH battery.

The utility model is suitable for any version bulbs such as screw-type, bayonet type or flange form, as long as the corresponding cooperation of formation between lamp socket 3 and bulb 1.

Claims

1, the explosion-proof Mine lamp cap in double loop is characterized in that:

A, employing double loop bulb (1), described double loop bulb (1) has two groups of separate filament loops, and double loop change-over switch (10) is set;

B, slidingtype lamp socket (3) is set, between lamp socket (3) and the lamp housing (2) spring (4) is set, the bulb (1) that is fixed in the lamp socket (3) is pressed on the cover plate (7), and lamp holder (1) afterbody contact and conductive reed (9) are jumper connection;

C, in the power supply loop, thermally sensitized polymerization switch (12) is set, described thermally sensitized polymerization switch (12) and double loop change-over switch (10) all are enclosed in the lamp housing (2) admittedly.