Internally inflatable sealing rubber strip

Abstract

The invention relates to a sealing rubber strip, in particular to a hollow H-shaped internally inflatable sealing rubber strip with the gradient. The internally inflatable sealing rubber strip comprises an annular rubber strip and a charging connector, and the fracture surface of the annular rubber strip is in a hollow H shape; the charging connector is fixedly connected with the annular rubber strip; the annular rubber strip comprises two side faces, a bottom face and a top face; the two side faces are symmetrically distributed; each side face is composed of an arc and two straight lines; the two straight lines of each side face are close to the bottom face and the top face; the top face is provided with a plurality of spaced triangular ridges; the charging connector is used for filling the annular rubber strip with compressed air; and under the inflation state, the two side faces and the bottom face are in contact sealing with a door frame rubber groove, and the top face is in contact sealing with a door body. The internally inflatable sealing rubber strip has the technical effects that the sealing performance is high, the sealing rubber strip can bear high passive and negative pressure, manufacturing and maintenance are simple, the service life is long, and facilities or measures do not need to be added during using.

Description

technical field [0001] The invention relates to a sealing rubber strip, in particular to a hollow I-shaped internally inflated sealing rubber strip with a slope. Background technique [0002] The sealing strip is widely used in the sealing of the box body and the door body, especially in special working conditions, there are special requirements for the sealing performance of the sealing strip, such as the highly toxic In the case of , flammable and explosive chemicals, the sealing performance of the sealing strip plays an important role in ensuring safety. [0003] In the production of medical equipment, the sealing strip is the main part of the seal between the door and the box of the ethylene oxide sterilizer. Ethylene oxide sterilizer is a device that uses a certain concentration of ethylene oxide gas to perform low-temperature fumigation and sterilization of articles sealed in a sterilization chamber under certain temperature, pressure and humidity conditions. Major e...

AI Technical Summary

Problems solved by technology

[0006] There are many types of sealant strips used in ethylene oxide sterilizers in the prior art, and the main technical defects include: the section of the inner air-filled strip is hollow, the upper part of the shape is semicircular, and the two sides are straight sides. Under the conditions of large positive pressure and negative pressure, the sealing effect is not good, and it is easy to leak; the outer inflatable thick-walled tubular rubber strip, the section of the rubber strip is thick-walled tubular, and the rubber strip is installed in the rectangular rubber groove of the door frame Among them, there is a vent hole in the appropriate position of the glue tank. During the working process, the compressed air is passed into the glue tank. After closing the door, there is a certain gap (3-5mm) between the door frame and the door body. No matter whether the box is under positive pressure or negative pressure, The compressed air at the bottom of the glue tank will push the rubber strip out, and press the rubber strip with the door body to ensure the seal. After a sterilization cycle is completed, when the compressed air in the glue tank is emptied, the rubber strip will always remain in the pushed out position. That is to say, the rubber strip is always higher than the outer plane of the door frame or flush with the outer plane of the door frame, and the door body cannot be opened and closed smoothly. Therefore, it is necessary to vacuumize the rubber tank after the compressed air in the rubber tank is emptied, and use the vacuum negative pressure to draw the glue The strip is drawn back to the bottom of the glue tank so that it no longer protrudes from the surface of the door frame and affects the opening and closing of the door body

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