A mining air supply dust mask

Abstract

A mining air supply dust mask comprises a pneumatic connector, a dust filter, a valve, an air ducting hose, a mask main body, etc. The mask is suitable for being worn by fixed point operators such as heading machine drivers, command staff, pneumatic drill operators, or anchoring and shotcreting workers of a press-in type ventilation heading operation face of a mine. The pneumatic connector is installed on an air duct wall of a pressed-in air supply duct, and directs a part of fresh air current in the air duct into the air ducting hose in a state of being connected with the air ducting hose. The fresh air current passes through the dust filter, the valve, and the air inlet hoses of the mask main body and is finally directed to a respiratory cavity of the mask body to be supplied to the user. Two rows of air outlet apertures are formed in the lower part of the mask body for exhausting. While wearing the mining air supply dust mask, the operator only needs to appropriately adjust the opening amount of the valve to keep an appropriate positive pressure in the respiratory cavity of the mask, so as to prevent the outside air containing dust from entering the respiratory cavity of the mask, thereby efficiently protect health of the operator. The mask does not need compressed air and electric power, is safe and reliable, and does not need a pressure reducing valve or an oil filter. The mask has a simple structure, superior practicality and ideal dustproof effects and is convenient to operate.

Description

technical field [0001] The invention relates to an air-supply dust-proof mask for mines, in particular to an air-supply dust-proof mask used for fixed-point dust-generating operations on press-in type ventilation excavation working faces in mines. Background technique [0002] Mineral dust is one of the main disasters in mines. As the last dust-proof measure for underground workers in mines, dust masks take on the important mission of protecting workers from dust. Wearing a dust mask is one of the main measures for mine workers to prevent pneumoconiosis and silicosis. [0003] At present, the dust masks commonly used in mines mainly include: self-suction type and air supply type. The breathing chamber of the self-priming dust mask is a closed dead space. When the operator wears it, the breathing chamber will always contain a certain concentration of carbon dioxide, and when worn in a working environment with high dust concentration for a long time, the amount of dust on th...

AI Technical Summary

Problems solved by technology

The breathing chamber of the self-priming dust mask is a closed dead space. When the operator wears it, the breathing chamber will always contain a certain concentration of carbon dioxide, and when worn in a working environment with high dust concentration for a long time, the amount of dust on the filter As time goes on, the breathing resistance increases accordingly, causing the workers to have a certain sense of oppression; and this mask has a certain sound insulation effect, even when communicating with other workers at close range, it is often necessary to remove the mask, which is not conducive to the individual Dustproof; air-supply dust masks are mainly divided into: power air-supply type and compressed air-supply type, etc. Although the air-supply dust mask is better than the self-priming dust mask, the breathing cavity of the mask is partially open. The supply of fresh air flow is maintained at all times, which fundamentally eliminates the feeling of oppression, and the sound transmission effect is good, which is convenient for workers to communicate at close distances. However, there are still some shortcomings: for example, the power air supply mask needs a miniature explosion-proof motor to provide power, The equipment needs electricity, and there are certain potential safety hazards. Its weight is too large, and operators need to carry out heavy-duty operations. When workers working on full-coal or half-coal rock excavation face wear this kind of mask, the air they inhale may be Contains a certain concentration of toxic and harmful gases such as hydrogen sulfide or gas; the compressed air supply mask uses the compressed air in the compressed air pipeline to supply air, so it is necessary to install a special pressure reducing valve in the air supply pipeline to decompress the compressed air , it is also necessary to set up an oil filter and a water filter to filter the oil and water of the compressed air, and the structure is slightly complicated

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