2results about How to "Avoid affecting the tightness" patented technology

The utility model relates to the technical field of pinch plates, in particular to an oil-stain-resistant pinch plate which comprises a pinch plate body, a reinforcing mechanism is installed on the plate wall of the pinch plate body, the reinforcing mechanism is formed by combining an inserting plate, a connecting plate A, a supporting plate and a connecting plate B. A rear inserting plate is formed at the bottom of the periphery of the pinch plate body in a punching mode. A connecting plate A is welded to one end of the supporting plate, the plate wall of the connecting plate A is fixedly connected with the plate wall of the inserting plate through an anchor bolt, a connecting plate B is welded to the plate wall of the supporting plate, the plate wall of the connecting plate B is fixedly connected with the plate wall of the pinch plate body through an anchor bolt, and the pinch plate body and the inserting plate are supported through the supporting plate. Deformation caused by repeated pressing between the insertion plate and the pinch plate main body is avoided, and the sealing performance between the pinch plate main bodies is not affected.

This utility model discloses an exhalation valve assembly for a protective face mask, including an exhalation valve base connected to the face mask. The exhalation valve base contains, from the inside out, a secondary valve plate, an exhalation valve protective seat, a primary valve plate, and an exhalation valve cover. The exhalation valve base has a cavity, and the inner wall of the cavity is formed with an exhalation valve cover mounting step and an exhalation valve protective seat mounting step. The exhalation valve protective seat is fastened onto the exhalation valve protective seat mounting step. The primary valve plate is mounted on the exhalation valve protective seat. The exhalation valve cover is positioned on the exhalation valve cover mounting step and presses against the top surface of the exhalation valve protective seat. A locking component is formed on the side wall of the exhalation valve cover mounting step. This utility model achieves double barrier by setting a primary valve plate and a secondary valve plate inside the exhalation valve base, blocking particulate matter in the air, preventing toxic substances from entering the face mask, reducing the corrosion of internal components by toxic gases, and extending the service life of the internal components of the face mask.