Sealing mechanism for large-size sealed case

Abstract

The invention discloses a sealing mechanism for a large-size sealed case. By adoption of the sealing mechanism for the large-size sealed case, the problems that a seal ring of an existing large-size sealed case is prone to instability under stress, and air leakage occurs are solved. An upper annular groove (9) is formed in the upper end face of a seal ring (8). A lower inner annular groove (10) and a lower outer annular groove (11) as high as the lower inner annular groove (10) are formed in the lower end face of the seal ring (8). An inner side step (7) in the position, at the inner side of a seal ring embedding groove, of a case flange (5) is higher than an outer side step (6) in the position, located at the outer side of the seal ring embedding groove, of the case flange (5); and the outer side step (6) located in the position, at the outer side of the seal ring embedding groove, of the case flange (5) is higher than the lower outer annular groove (11). According to the sealing mechanism for the large-size sealed case, reliable sealing is guaranteed while the defect that the seal ring on the case flange with the extra large-size seal surface is instable under stress is overcome through the multi-peak seal ring.

Description

technical field [0001] The invention relates to a sealing mechanism for a large-size box body, in particular to a sealing mechanism between the box body and the box cover on the large-size sealed box body. Background technique [0002] At present, some products are getting bigger and bigger. These products have special environmental requirements and need to be stored, packaged and transported in a closed, pressurized and nitrogen-filled environment. The sealed packaging boxes used to pack these large-sized products are required to be reliably sealed and airtight within half a year. In order to facilitate the packing and unpacking of large-scale products, sealed packaging boxes are often made with upper and lower cover opening structures, and the sealing ring is assembled on the flange surface that matches the box cover and the box body. When the pressure nitrogen is filled, the flange of the box is prone to tilting outwards and deformed, which will cause the sealing ring on...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a sealing mechanism for a large-size sealed box, which solves the technical problem that the large-sized sealed box is prone to stress instability of the sealing ring and air leakage

Images