Mouthpiece anti-loose device and anti-loose method

Abstract

A horn nozzle anti-loosening apparatus and an anti-loosening method. The apparatus comprises a first lock body (1) and a second lock body (2) with semicircular cylindrical inner walls; locking components arranged on the first lock body (1) and the second lock body (2); locking rings (4) arranged on the inner walls of the first lock body (1) and the second lock body (2); a communicating joint (9) that matches the inner walls of the first lock body (1) and the second lock body (2); a horn nozzle (8) connected to the communicating joint (9); and anti-slip pads (6) installed on the inner walls of the first lock body (1) and the second lock body (2). An installation slot is formed between a front end of the communicating joint (9) and a horn side wall (82); or a bump (81) is arranged on the horn mouth, and an installation slot is formed between the bump and the horn side wall (82) or the front end of the communicating joint (9). The installation slot is used for clamping the lock rings (4). The anti-loosening method corresponds to the horn nozzle anti-loosening apparatus. The horn nozzle anti-loosening method and the apparatus are convenient and useful, and can effectively prevent an electrical device losing its explosion-resistance protection due to a horn nozzle being loosened by hand or by means of a non-specific tool.

Description

technical field [0001] The invention relates to the technical field of electrical equipment protection, in particular to a bell mouth anti-loosening device and an anti-loosening method for electrical equipment. Background technique [0002] Electric spark ranks first among the many factors that ignite the ignition source of coal mine gas explosion, about 70%. Preventing "detonation" from generating electric sparks is particularly important for preventing gas explosions. The mine switch has a bell mouth for power supply in and out, which is connected to the switch wiring cavity. The bell mouth belongs to GB3836.1-2010 Explosive gas atmosphere uses electrical equipment 3.17 compression element, which is a sealing ring for the cable entry device Components that apply pressure to ensure their effective functions, such as bell mouths (especially screw-type bell mouths) are easy to be loosened by hand or with ordinary tools intentionally or unintentionally, resulting in "explosio...

AI Technical Summary

Problems solved by technology

The mine switch has a bell mouth for the power supply to enter and exit, which is connected to the switch wiring cavity. The bell mouth belongs to GB3836.1-2010 Explosive gas atmosphere uses electrical equipment 3.17 compression element, which is a sealing ring of the cable lead-in device. Components that apply pressure to ensure their effective functions, and the horn mouth (especially the spiral horn mouth) is easy to be loosened by hand or with ordinary tools intentionally or unintentionally, causing electrical equipment to "explode"

At present, there are almost no studies and reports on the anti-loosening protection of bell mouths, especially the bell mouths of coal mine electrical equipment at home and abroad.

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