CN2055682U - Helmet with gas alarm - Google Patents
Helmet with gas alarm Download PDFInfo
- Publication number
- CN2055682U CN2055682U CN 89217468 CN89217468U CN2055682U CN 2055682 U CN2055682 U CN 2055682U CN 89217468 CN89217468 CN 89217468 CN 89217468 U CN89217468 U CN 89217468U CN 2055682 U CN2055682 U CN 2055682U
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- CN
- China
- Prior art keywords
- gas
- utility
- model
- cap
- described safety
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model relates to a gas alarm safety helmet. The inner side of the helmet shell of the utility model is provided with a miniature gas detector and a sounder which is connected with the miniature gas detector; the utility model can automatically detect the concentration of harmful gases in circumambient air, such as gas, carbon monoxide, petrol, natural gas, methane, etc.; when the concentration of the harmful gas exceeds a safety standard, the utility model can make sound and light alarm. The main technical indexes of the utility model is that the alarm sensitivity can be adjusted by a gas-sensitive sensor within 50 ppm-1000 ppm; the service life of the utility model is 5000 hours; the power consumption is 0.5W. The utility model has the advantages of simple manufacturing and debugging, convenient and safe utilization, etc.
Description
The utility model belongs to a kind of cap product, especially for the gas alarming safety cap of colliery down-hole miner use.
Gas alarm adopts the fixed installation mode in the mine now, and test point is comparatively limited, fixing.When underground work flow of personnel face is big, can not in time measure the gas density of place working face, cause contingency.
The purpose of this utility model is to design a kind of gas alarming safety cap, when fire damp content or other content of harmful gas surpass safety standard, promptly sends sound and light alarm, so that in time take corresponding safety measure, avoids the generation of accident.
The utlity model has following content: the cap shell, cap tire and the frenulum that comprise miner's safety helmet, and mine lamp and power supply etc., it is characterized in that the cap shell inside below is equipped with miniature gas indicator and the sounder that links to each other with detector, is carved with gas and detects the hole on the cap shell.Above-mentioned miniature gas indicator can be by gas sensor, and sensitivity adjusting circuit is formed.Gas sensor is the heater-type metal oxide semiconductor of two parallel coupled, and the heater strip of gas sensor is in full closeding state, for example adopts the ceramic jacket sealing.The sensor input can also be provided with the startup delay circuit of RC integrating circuit and isolating amplifier circuit composition.Above-mentioned sounder can be made of the audio oscillator circuit that ultralow-frequency oscillator connects, and also can be made of separately audio oscillator circuit, and the output of detector is connected to light emitting diode, and foregoing circuit all adopts the 4V dc source.
Fig. 1 is the utility model external form schematic diagram.
Fig. 2 is a miniature gas alarm circuit schematic diagram of the present utility model.
Fig. 3 is a sensor construction schematic diagram of the present utility model.
Below be embodiment: comprise the cap shell of safety cap, cap tire and frenulum, and mine lamp and 4V dc source etc. is characterized in that the cap shell inside below is equipped with miniature gas indicator and the sounder that links to each other with detector.Above-mentioned detector comprises the gas sensor GS that the metal oxide semiconductor of two parallel coupled is formed, and adopts ceramic seal on its heater strip.The former can improve the stability of sensor; The latter improves the thermal efficiency.Sensor GS input is provided with delays time about one minute by R
1C
1Integrating circuit and operational amplifier U
1The startup delay circuit of forming in case during electric power starting, gas sensor GS both end voltage is raise gradually, produces false alarm to avoid sounder to be driven by overshoot voltage.Sensor GS output and comparator U
2Link to each other U
2End of oppisite phase select potentiometer W with sensitivity
1Link to each other U
2Output be connected to a LED
1, when gas sensor GS touched in the air gas, the dielectric coefficient of metal oxide semiconductor reduced, and its electric current is increased, so operational amplifier U in-phase end current potential raises, and made LED
2Luminous indication.Comparator U
2Output is connected with the ultra-low frequency oscillation circuit of f=2HZ, and its output is connected with a 1KH audio oscillator circuit, and the low-power consumption buzzer.
The utility model can detect in the surrounding air outer other pernicious gas of mash gas automatically, such as CO, gasoline, natural gas, methane etc., and its warning sensitivity is in that 50PPm～the 1000PPm scope is adjustable. Also has following technical indicator: the about 0.5W of power consumption; About 5000 hours of gas sensor life-span, and adopt the 4V mine lamp power.
After using the safety cap, have obvious superiority than install gas alarm concentratedly in mine in timely, reliable and confidence level, being equivalent to has increased numerous test points in mine, reliability and confidence level are improved greatly.
Claims (7)
1, gas alarming safety cap comprises the cap shell of miner's safety helmet, and cap tire and frenulum, and mine lamp and power supply etc. is characterized in that cap shell inside is equipped with miniature gas indicator and the sounder that links to each other with detector, and is carved with on the cap shell and detects the hole.
2, according to the described safety cap of claim 1, it is characterized in that miniature gas indicator is connected to form by gas sensor and sensitivity adjusting circuit, the sensor input can also be provided with R
1C
1The startup delay circuit that integrating circuit and isolating amplifier circuit are formed.
3,, it is characterized in that sounder can be made of the audio oscillator circuit that ultralow-frequency oscillator connects, and also can be made of separately audio oscillator circuit according to claim 1 or 2 described safety caps.
4,, it is characterized in that gas sensor is the heater-type metal oxide semiconductor of two parallel coupled, and the heater strip of sensor adopts sealing means according to claim 1 or 2 described safety caps.
5,, it is characterized in that the output of detector is connected to the light emitting diode indication according to claim 1 or 2 described safety caps.
6,, it is characterized in that gas sensor is the heater-type metal oxide semiconductor of two parallel coupled, and the heater strip of sensor adopts sealing means according to the described safety cap of claim 3.
7,, it is characterized in that miniature gas indicator and sounder all adopt the 4V dc source according to the described safety cap of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89217468 CN2055682U (en) | 1989-09-28 | 1989-09-28 | Helmet with gas alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89217468 CN2055682U (en) | 1989-09-28 | 1989-09-28 | Helmet with gas alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2055682U true CN2055682U (en) | 1990-04-11 |
Family
ID=4872718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89217468 Withdrawn CN2055682U (en) | 1989-09-28 | 1989-09-28 | Helmet with gas alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2055682U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167082A (en) * | 2013-05-15 | 2014-11-26 | 光明理化学工业株式会社 | Gas alarm device |
-
1989
- 1989-09-28 CN CN 89217468 patent/CN2055682U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167082A (en) * | 2013-05-15 | 2014-11-26 | 光明理化学工业株式会社 | Gas alarm device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |