Mining intrinsically safe closed-end amplified phone circuit device

Abstract

The invention discloses a mining intrinsically safe closed-end amplified phone circuit device, which comprises an 18V intrinsically safe power module, a charging control circuit, a voice amplifier, a dotting output module, a front-end voice amplification module and a signal switching processing module, wherein the 18V intrinsically safe power module is connected with the charging control circuit through a connecting terminal; the charging control circuit is connected with the voice amplifier, the dotting output module, the front-end voice amplification module and the signal switching processing module respectively; the voice signal output end of the signal switching processing module is connected with the voice amplifier which is connected with a loudspeaker; and the signal switching processing module is connected with a dotting device through a dotting button and a transmitter button. The device can be used for voice communication, can stop and lock equipment such as a motor when used together with various electrical control devices to ensure the safety of personnel and the equipment, and also can control external equipment.

Description

technical field [0001] The invention relates to a loudspeaker telephone, in particular to an intrinsically safe closed-type loudspeaker telephone circuit device for mines. The loudspeaker telephone is suitable for communication and control of the working face of belt conveyors and mining working faces in coal mines. Background technique [0002] At present, there are quite a lot of belt conveyors in coal mines in my country, and most of the control parts of belt conveyors are composed of separate components (such as: contactors, relays, etc.). This kind of control equipment is bulky, has a high failure rate, and is inconvenient to maintain, especially when it is transported and installed underground. [0003] In addition, it is difficult for the existing mine-used underground loudspeaker devices to be used in conjunction with various electrical control devices, and it is impossible to stop and lock the equipment, which brings hidden dangers to the safety of people and equip...

AI Technical Summary

Problems solved by technology

This kind of control equipment is bulky, has a high failure rate, and is inconvenient to maintain, especially in the underground transportation and installation.

[0003] In addition, it is difficult for the existing underground sound amplifiers for mines to be used in conjunction with various electrical control devices, and it is impossible to stop and lock the equipment, which is harmful to the protection of personal and Equipment security poses hidden dangers

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