Easy-to-replace filter device for chemical experiment gas mask

Abstract

The invention discloses a chemical experiment gas defense mask filtering device facilitating replacement. The chemical experiment gas defense mask filtering device comprises a cylinder. A filter cavity is formed in the cylinder; the cylinder comprises an inserting section and a filter section which are connected; the radial size of the inserting section is smaller than that of the filter section;a sealing ring is arranged in the connection position of the outer walls of the inserting section and the filter section; a bearing piece is movably connected in the filter section in a sleeved mode,and the radial section of the bearing piece is semicircular; at least two clamping-connection grooves are formed in the bearing piece in the axial direction; a filter piece is connected in each clamping groove in a clamped mode; and a groove part or a bulge part allowing the hand to apply force for mounting and demounting is arranged at the end, away from the inserting section, of the bearing piece. According to the chemical experiment gas defense mask filtering device facilitating replacement, the cylinder is detachably connected in a chemical experiment gas defense mask; aiming at differenttoxic gas generated in chemical experiments and needing to be filtered, the corresponding filter pieces can be replaced specifically, and thus almost all the types of toxic gas can be filtered.

Description

technical field [0001] The invention relates to a gas mask, in particular to a filter device for a chemical experiment gas mask which is easy to replace. Background technique [0002] In the chemical laboratory, the gas emitted during some experiments is poisonous and harmful, and a small amount of some highly toxic gases such as cyanide can cause great harm to the human body. Therefore, the experimenters need to wear gas masks when doing this part of the experiment. For example, the application publication number is CN106581880A, the application publication date is April 26, 2017, and the invention patent application titled "A Gas Mask for Chemical Experiments" provides such a gas mask specially used for chemical experiments. It includes a removable filter unit, a fixed filter unit and an air outlet tube. It realizes the replacement of activated carbon layer and wet gauze through a detachable filter device. [0003] The disadvantage of the prior art is that chemical exper...

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Problems solved by technology

[0003] The disadvantage of the prior art is that chemical experiments will produce a great variety of toxic gases, and not all of these toxic conditions can be dealt with by replacing the active carbon layer and wet gauze, which makes the gas mask in the prior art able to deal with more limited

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