CN2188766Y

CN2188766Y - Miner's lamp type gas alarm

Info

Publication number: CN2188766Y
Application number: CN 93229590
Authority: CN
Inventors: 秦坤
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-10-31
Filing date: 1993-10-31
Publication date: 1995-02-01
Anticipated expiration: 2003-10-31

Abstract

The utility model relates to a miner's lamp type gas alarm composed of a lamp cap, an accumulator, a circuit board, a sensor, etc. Compensating elements are respectively arranged on the circuit board, and the lighting line and the alarm controlling line only use three lines. A relay normally closed contact is adopted between the lamp cap and a power and switches on the power without pressure drop. The utility model has the advantages of less control circuit, low failure rate, small power consumption of the sensor, having the same weight and volume with the common miner's lamp, portability and convenient operation.

Description

Miner's lamp type gas alarm

The utility model relates to a kind of electronic monitoring device, is a kind of mine lamp formula gas alarm specifically.

Present existing mine lamp formula gas alarm kind is more, but all exists certain defective, and is big as the sensor power consumption, more than 350 milliamperes, the triode step-down is big, thereby establishes power supply in addition, has increased operation circuit, circuit design is complicated, and operation circuit reaches the six roots of sensation, the failure rate height.The control section that has is contained in the lamp holder outside, has increased volume and weight to lamp holder, uses inconvenient.

It is a kind of low in energy consumption that the purpose of this utility model is to provide, the sensor of dependable performance, in light weight, circuit is few, circuit design is simple, installation is reliable, easy to use mine lamp formula gas alarm.

The technical solution of the utility model is: the part of reporting to the police is sensor to be fixed on the shell of lamp base 4 compensating element, Mg ₂Be divided on the wiring board 2, this circuit is that illumination is only used a three-core anti-explosion cable 3, sensor Mg with control line ₁One terminate in the lamp holder on the power positive end sensor Mg ₂Be connected on the negative terminal of power supply in the lamp holder Mg ₁, Mg ₂In addition two ends be connected together, guide to the input negative terminal of IC with a control line, lamp holder is to adopting the relay normally closed contact between the power supply, energized does not have pressure drop, and stabilized power source is contained on the wiring board 2 with LM317 type integrated circuit, detecting element constitutes the detection bridge by resistance, with 1/4 LM339 type integrated package, two triode BG ₁, BG ₂, C ₂, relay forms oscillator.

The design's advantage:

1, detecting element 5 is contained in separately in the lamp holder 4, and circuit component is few, and failure rate is low;

2, detection bridge power consumption is little, is no more than the 80-84 milliampere;

3, in light weight, weight/power ratio is the lightest mutually with existing mine lamp formula gas warning head lamp;

4, whole mine lamp is integrated, and the gas-warning device that is increased is an one with mine lamp all, and is easy to carry;

Concrete structure of the present utility model is provided by the following drawings and embodiment.

Fig. 1 is a mine lamp formula gas alarm outside drawing

Fig. 2 is mine lamp formula gas alarm circuit theory diagrams

Referring to Fig. 2, when gas density reach 1% when above by sensor Mg ₁, through adjustable potentiometer W ₁Input to comparison amplifier IC, comparison amplifier IC is through electricity group R ₆Input to triode BG ₁, turn-on transistor, BG ₂Also conducting simultaneously, relay J adhesive normally closed contact J ₁, normally closed contact J ₁Disconnect, bulb X breath goes out, through the negative feedback capacitor C ₂, resistance R ₈To BG ₁Base stage and produce interrupted oscillation, going out when bright during bulb X this moment is alerting signal.

Stabilized voltage supply WR ₁, R ₂, C ₃Composition is made circuit power for 2,5 volts by the output of (2) end.Whole testing circuit consumes 84 milliamperes, and during warning 116 milliamperes, the power supply of alkaline mine lamp is 2,5 volts, so can be stabilized voltage supply WR ₁, R ₂Remove, 3,2 two ends are connected, alkaline mine lamp operate as normal.

Claims

1, a kind of mine lamp formula gas alarm, form by lamp holder (4), accumulator (1), circuit board (2), triple cable line (3), sensor (5), bulb (6), switch (K), it is characterized in that: the part of reporting to the police is sensor to be fixed on the shell of lamp base (4) compensating element, Mg ₂Be divided on the wiring board (2), this circuit is that illumination is only look at (3) sensor Mg with an explosion-proof electricity of three-core with control line ₁One terminate in the lamp holder on the power positive end sensor Mg ₂Be connected on the negative terminal of power supply in the lamp holder Mg ₁Mg ₂In addition two ends be connected together, guide to the input negative terminal of IC with a control line, lamp holder is to adopting the relay normally closed contact between the power supply, energized does not have pressure drop, and stabilized power source is contained on the wiring board (2) with LM317 type integrated circuit, detecting element constitutes the detection bridge by resistance, with 1/4 LM339 type integrated package, two triode BG ₁, BG ₂, G ₂, relay forms oscillator.