A surface spraying device for building construction materials

Abstract

This utility model discloses a surface spraying device for building construction materials, including a spray gun, a paint holding assembly, and a sealing assembly. The spray gun has a power unit at its bottom. The paint holding assembly includes a paint cylinder located at the paint feeding end of the spray gun, with a sealing cap at its top. The sealing cap has a balancing hole at its top for balancing pressure. The sealing assembly includes a movable part, the top of which is inserted into the inner cavity of the balancing hole. The top of the sealing cap has a pressing part inserted into it to maintain the insertion of the movable part into the balancing hole. This utility model, by using a sealing assembly on the top sealing cap of the spray gun, allows the movable part to be inserted into the balancing hole and sealed when the spray gun is not in use. The insertion of the movable part into the sealed balancing hole prevents the paint in the paint cylinder from flowing back into the balancing hole, preventing the paint from solidifying and blocking the balancing hole, thus affecting the downward flow of paint from the paint cylinder due to gravity during subsequent use of the spray gun.

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