2results about How to "Squeeze tight" patented technology

This utility model discloses a waterproof and dustproof structure for a lithium battery, including a lower cover and an upper cover. One side of the lower cover and the upper cover, respectively, has an integrally formed extension edge one and an extension edge two. A sealing strip one is sandwiched between the extension edges one and two. Fastening components for squeezing the sealing strip one penetrate the corners of the overlapping extension edges one and two. The fastening components are elastic near both ends. Compared with the prior art, the advantages of this utility model are that the concave-convex design of the sealing strip one, in conjunction with the concave-convex surfaces of the extension edges, increases the tortuosity of the sealing path, making it difficult for moisture or dust to directly penetrate; the adhesive layer on the sealing strip one is bonded to the extension edge, and the adhesive layer can maintain tight contact even under vibration or temperature changes, preventing gap formation; the fastening components provide constant compressive force, compensating for the loss of elasticity of the sealing strip and ensuring that the sealing strip is always tightly squeezed.

A multi-layer fluoropolymer-lined bellows control valve includes a valve body, valve seat, valve core, valve stem, actuator, valve cover, and packing seal assembly. The valve body and valve cover are connected to form a valve cavity. The valve seat is fixed within the valve body. The valve stem passes through the valve cover, with one end located inside the valve cavity and connected to the valve core, and the other end located above the valve cavity and connected to the actuator. The actuator drives the valve stem to slide axially. The valve seat includes a central support core and a valve seat covering layer. The upper end of the central support core has a groove, and a hollow elastic metal ring is fixed in the groove. The valve seat covering layer covers the outer periphery of the valve seat body formed by the connection of the central support core and the hollow elastic metal ring. The valve seat covering layer is made of elastic fluoroplastic material. This utility model provides a multi-layer fluoropolymer-lined bellows control valve with a compact structure that eliminates the wear problem between the valve core and valve seat.