Mining intrinsically safe car backing-up alarming device

Abstract

The invention relates to a mining intrinsically safe car backing-up alarming device. More than four middle sound transmission holes, front mounting grooves and rear mounting grooves are formed on the circumference of the inner chamber of a casing; a cable connecting plug is hermetically mounted on a mounting base at the lower part of the casing; a horn is mounted on a rear window of the casing inan inverted manner; a waterproof diaphragm is hermetically mounted on the rear end surface of the casing through a pressure plate; a front cover is mounted at the front part of the casing; a transparent lid is hermetically mounted at a window of the front cover and forms a closed watertight seal cavity; a middle cover plate on which a circuit board, an alarm lamp and a camera are mounted is mounted on the front cover or / and the inner chamber wall of the casing; more than four front sound transmission holes at the front part of an annular groove on the front cover and the middle sound transmission holes on the casing are arranged in a staggered manner; drain holes are formed at the bottom of the annular groove; a rear cover with a spherical surface is mounted at the rear part of the casingand opposite to the waterproof diaphragm; and a cavity between the rear cover and the casing is communicated with the middle sound transmission holes and the front sound transmission holes to form sound channels. The mining intrinsically safe car backing-up alarming device has the advantages of reasonable structure, convenience and reliability in use and flushing resistance, and can dynamically capture video of the rear part of a vehicle.

Description

technical field [0001] The invention relates to an intrinsically safe reversing alarm device for mines, which belongs to the technical field of alarm equipment used in coal mines and places with explosive hazards. Background technique [0002] In mines containing explosive dangerous gases such as methane and other coal dust, real-time monitoring and early warning of the basic parameters of explosion-proof vehicles are required through various instruments. The detection of basic parameters is mainly aimed at the real-time tracking and detection of several parameters such as the gas content of the mine environment, the exhaust gas treatment system of the diesel engine, the lubrication system, and the surface temperature of the casing. In order to observe the measurement results of various instruments conveniently, each instrument provides the monitoring signal to the alarm device, which makes the operator clear at a glance and reminds the operator to pay attention, thereby pro...

AI Technical Summary

Problems solved by technology

However, after the backup alarm with the above structure is used for a period of time, the dust will adhere to the front panel and the outer surface of the housing, and the light-emitting diodes are located on the front panel. As the dust increases, the light-emitting diodes will lose brightness, and the same audio frequency will vibrate. After the dust is attached to the cover, it also reduces the vibration of the audio vibration cover, that is, the paper cone, reduces the sound volume, and reduces the effect of the alarm. At the same time, the alarm with the above structure cannot be cleaned.

Furthermore, the current reversing alarm cannot measure the situation at the rear of the vehicle, so it cannot achieve the effect of a full range of alarms.

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