Flying stop device for carbon dioxide extraction device

Abstract

The invention aims to provide a flying stop device for a carbon dioxide extraction device, and relates to a safety device in a mine, in particular to an expandable safety device for carbon dioxide extraction. The flying stop device for the carbon dioxide extraction device is simple in structure, reusable, simple and convenient to use and fine in flying stop effect. The flying stop device comprises an expansion pull rod (1) and an expansion sleeve (3), the expansion pull rod comprises a pull rod portion (11) and a frustum portion (12) which are mutually connected from front to back, a small end of the frustum portion faces the pull rod portion, the front end of the pull rod portion is connected with a nut (2) in a threaded manner, the expansion sleeve (3) is sleeved outside the expansion pull rod and comprises a sleeve (31) and an expansion head (32) which are mutually connected from front to back, the length of the sleeve is not smaller than 300mm, the diameter of the expansion head is not smaller than 45mm, the rear end of the expansion head is sleeved outside the frustum portion, at least two expansion pieces (321) are arranged at the rear end of the expansion head, and an arc groove (3211) is annularly formed in each expansion piece.

Description

technical field [0001] The invention relates to a safety device in a mine, in particular to an expandable safety device for carbon dioxide exploitation. Background technique [0002] The carbon dioxide extractor is a new type of blasting equipment for exploitation. It is different from the traditional gunpowder blasting equipment. The carbon dioxide extractor consists of a high-strength reusable metal tube filled with liquid carbon dioxide, a heater (heating device), a constant pressure Discharge mechanism and other components. When in use, place the extractor in the coal borehole, use the detonator to start the heater, heat the liquid carbon dioxide inside to become gas, and the pressure in the pipeline continues to increase to press the constant pressure energy release mechanism, so that the constant pressure energy release sheet Break, and then release carbon dioxide gas with a volume enlarged by 600 times and a pressure of 100 MPa for blasting. Since the gas released qu...

AI Technical Summary

Problems solved by technology

When the carbon dioxide extractor is in use, due to the rapid expansion of the gas, it is easy to cause the extractor to fly out of the borehole during blasting and cause an accident

However, the expansion amount of the expansion friction sleeve depends on the displacement of the expansion friction sleeve relative to the expansion cone, and the anti-flying effect is related to the expansion amount of the expansion friction sleeve. When the expansion friction sleeve moves relative to the expansion cone, the expansion cone will also be affected. The thrust of the expansion friction sleeve, the expansion cone does not receive the pulling force in the opposite direction to ensure the expansion effect of the expansion friction sleeve. It must be connected with the miner when using it, which is inconvenient to use

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