CN2871412Y - Cap with pressure releaser - Google Patents

Abstract

The utility model relates to a lid with pressure releasing device, comprising a lid body on which an axial through hole is arranged. In the hole is provided with a movable post in the hole as gap cooperation. Two bowls with diameter more than the hole are arranged at the bottom and top of the movable post in which a spring is sleeved and the spring is fixed at the lid body. The movable post contacting the lid body is arranged with a sealing ring. The utility model structure is simple and convenient, especially applicable to small vessels.

Description

The lid that has pressure relief device

Technical field

The utility model belongs to articles for daily use, more specifically, relates to the lid of using on a kind of container, particularly a kind of lid that has pressure relief device.

Background technology

Under many circumstances, the liquid in the container is that higher pressure is arranged, and as pressure cooker, pressure can reach 2-3 barometric pressure in the pot, and exhaust for a long time can be opened pot cover after the inside and outside pressure unanimity of order, to guarantee safety.Recently, some small containers are made exquisite day by day, and heat retaining property, leak tightness have a continued development, and also can cause the inside and outside pressure of container inconsistent.As this class container of metal hot-water bottle, when a large amount of high-temp liquid of interior dress, can produce in the container than extraneous high pressure, in the moment that lid is opened, have a small amount of scorching hot liquid ejection, scald the user.Therefore on the lid of small containers, blowdown valve also is the ground of force of great use, but as adopts and resemble the blowdown valve that pressure cooker is used, complexity too rather.

Summary of the invention

The technical problems to be solved in the utility model is that small containers lacks suitable pressure relief device, and a kind of simple and practical lid that has pressure relief device is provided.

For achieving the above object, the technical solution adopted in the utility model is such: the lid that has pressure relief device, comprise lid, it is characterized in that: an axial through hole is arranged on the lid, this through hole is built-in with a movable post, with through hole be free-running fit, movable post respectively has the snap ring of diameter greater than through hole up and down; Movable post also is with a spring outward, and spring is fixed on the lid; The contact site of movable post and lid is provided with seal ring.

Further, a snap ring is arranged at the top of this activity post, is located on the spring, and spring is pushed down; There is a snap ring lower end, is stuck under the lid lower surface; Be provided with seal ring between movable post lower end snap ring and lid lower surface.

Movable post of the present utility model is provided with two snap rings, makes movable post be unlikely to break away from lid; Under conventional state, spring upwards pushes up movable post, the lower end snap ring is pressed on the lid, owing to be provided with seal ring between snap ring and lid lower surface, be leak free between movable post and lid therefore, and can keep container inner pressure; When the needs pressure release, by movable post, the lower end snap ring promptly separates with the lid lower surface downwards, and movable post and through hole are free-running fit simultaneously, so can form an air flue, communicate with ambient atmosphere, makes container inner pressure with extraneous consistent; Broadcast movable post, it resets under action of the spring again, becomes air-tight state.

The utility model only has movable post and two parts of spring, and coaxial assembling, and structure is very simple; Only need during operation one to press gently, use also easily, be particularly suitable for the container small-sized, that pressure reduction is little.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

The specific embodiment

Referring to accompanying drawing.Present embodiment comprises lid 1, and its place, axle center has an axial through hole 2, through hole 2 to be built-in with free-running fit between the movable post 3,2,3; Movable post 3 is provided with briquetting 31 from top to bottom, last snap ring 32, and following snap ring 33, through hole 2 middle section positions have a ring-type platform 21, in order to place spring 4; Spring 4 is enclosed within outside the movable post 3 simultaneously, also is being provided with seal ring 5 under the movable post between snap ring 33 and lid.

Present embodiment is under conventional state, and spring 4 upwards pushes up movable post 3, makes down snap ring 33 and lid lower surface seal ring, therefore can keep container inner pressure; When the needs pressure release, flicking 31, then movable post moves downward, and following snap ring 33 promptly separates with the lid lower surface, forms an air flue, communicates with ambient atmosphere, makes container inner pressure with extraneous consistent; Broadcast 31, movable post resets under action of the spring again, becomes air-tight state.

Claims (2)

1. have the lid of pressure relief device, comprise lid, it is characterized in that: an axial through hole is arranged on the lid, and this through hole is built-in with a movable post, with through hole be free-running fit, movable post respectively has the snap ring of diameter greater than through hole up and down; Movable post also is with a spring outward, and spring is fixed on the lid; The contact site of movable post and lid is provided with seal ring.

2. lid as claimed in claim 1 is characterized in that: a snap ring is arranged at the top of movable post, is located on the spring, and spring is pushed down; There is a snap ring lower end, is stuck under the lid lower surface; Be provided with seal ring between movable post lower end snap ring and lid lower surface.

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