CN2178222Y

CN2178222Y - Pressure-removing container cover

Info

Publication number: CN2178222Y
Application number: CN 93245547
Authority: CN
Inventors: 胡筑琴; 徐建云
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-11-27
Filing date: 1993-11-27
Publication date: 1994-09-28
Anticipated expiration: 2003-11-27

Abstract

Disclosed is a container cover which can eliminate the internal pressure of a container. The utility model is composed of a movable inner cover and an outer cover with a through hole, wherein, the movable inner cover which is arranged in the outer cover close contacts the outer cover, and the container is sealed; one surface in the movable inner cover is communicated with the outside through the through hole on the outer cover, and the other surface in the movable inner cover is communicated with the container. When pressure is generated in the container, the position of the movable inner cover in the container is correspondingly changed by following the change of the pressure, and the volume of the container is correspondingly changed. Therefore, the pressure in the container is in line with the pressure of the outside.

Description

Pressure-removing container cover

The utility model relates to a kind of container sealing device, and it can not only make seal of vessel, and can eliminate the pressure that produces in the container.

Though present existing container cover can make seal of vessel, can't eliminate sealed container internal cause temperature traverse and the pressure that produces, this pressure can cause container to open difficulty during for negative pressure, then might cause container to break during for malleation.

The purpose of this utility model provides a kind of container cover, and it can not only make seal of vessel, and can eliminate the pressure in the container.

The purpose of this utility model is achieved in that the utility model is made up of enclosing cover that has through hole and movable inner cover, movable inner cover is contained in the enclosing cover, the exterior and interior cover closed contact makes seal of vessel, and movable inner cover communicates with the external world by the through hole that covers outward with interlayer between the enclosing cover.Movable inner cover can be made convex with elastomeric material, utilizes the fluctuating of convex surface to be out of shape the pressure of regulating in the container; Also can make piston structure, utilize the upper and lower displacement of piston to change the pressure of regulating in the container.When the pressure in the container during greater than ambient pressure, the convex surface that the pressure in the container will the activity compression inner cap or promote piston to outer displacement increases the volume of container, thereby the pressure and the external world in the container is reached unanimity; Otherwise when container inner pressure during less than the pressure in the external world, the convex surface that extraneous pressure will make movable inner cover is further outstanding or make piston to the container intrinsic displacement in container, the volume of container is reduced, thereby make the inside and outside pressure of container keep balance.

Owing to adopt such scheme, the utility model can not only be eliminated the pressure in the container effectively, and structure is very simple.

The utility model is described in further detail below in conjunction with drawings and Examples.

Accompanying drawing one is the section of structure of convex movable inner cover;

Accompanying drawing two is section of structures of piston type movable inner cover;

In the accompanying drawing, 1, through hole, 2, enclosing cover, 3, movable inner cover, 4, container.

In the accompanying drawing one, the movable inner cover made from elastomeric material (3) is contained in the enclosing cover (2), and with enclosing cover (2) closed contact, the through hole (1) on the enclosing cover (2) makes the interlayer between the inside and outside lid communicate with the external world, enclosing cover is pressed on the vessel port end face with inner cap during use, makes seal of vessel.

In the accompanying drawing two, the enclosing cover of taper (2) seals with vessel port (4) closed contact of taper, the movable inner cover of piston shape (3) is contained in taper enclosing cover (2) inside, be moving contact between movable inner cover (3) and the enclosing cover (2), the through hole (1) on the enclosing cover (2) makes a face of movable inner cover communicate with the external world.

When temperature in the airtight container descends, pressure in the container will be littler than the barometric pressure in the external world, at this moment Wai Jie pressure will promote movable inner cover (3) by the through hole (1) on the enclosing cover (2) and produce displacement in container, make corresponding the reducing of volume of container, thereby the container inner pressure and the external world are consistent.

Otherwise, when airtight container internal cause temperature build-up, the pressure in the container will be higher than extraneous barometric pressure, and at this moment pressure inside will promote movable inner cover (3) and outwards produce displacement, make the corresponding increase of volume of container, to keep the pressure in the container and the balance of external atmosphere pressure.

Therefore, as long as the variation range of volume when material expands with heat and contract with cold in the variation range of movable inner cover (3) and the container is adapted, just can eliminate the interior pressure of container effectively.

Movable inner cover and enclosing cover can be made respectively as required, also can be integral.

Claims

1, a kind of pressure vessel lid that disappears, it is characterized in that it can be made up of with the movable inner cover (3) that container inner pressure variation changes position or shape the enclosing cover (2) of a band through hole (1) and one, movable inner cover (3) is contained in enclosing cover (2) lining, and with enclosing cover (2) closed contact, make seal of vessel; Movable inner cover (3) has a face to communicate with the external world by the through hole (1) on the enclosing cover (2), and another face communicates with container.

2, container cover according to claim 1 is characterized in that enclosing cover (2) and movable inner cover (3) can make respectively, also can be integral.