Pressure vessel exhaust valve device

Abstract

The invention relates to a valve core, which comprises a valve core body and an ejector pin of metal structures, wherein a silicone layer is arranged on the outer side of the valve core. The invention further relates to an exhaust valve device which comprises a valve core, a valve outer cover, a valve inner sleeve, a valve rod, a gasket and a base. The gasket and the base are fixed on the upper portion of the valve rod in sleeved mode; an opening structure is installed at the upper end of the valve inner sleeve, internal protruding ribs are respectively arranged at the inner bottom and the inner side wall, external protruding ribs are arranged at the outer bottom, a through hole is arranged at the center of the bottom, a handle is arranged on the outer side wall of the lower end, and the valve core is installed in the valve inner sleeve; an opening structure is installed at the lower end of the valve outer cover, a positioning boss and an assembling notch are arranged at the lower end, a vent hole is arranged at the upper end, and the valve inner sleeve is installed in the valve outer cover and limited through the positioning boss; and a guide boss in smooth transition with the upper surface is arranged on the upper surface of the base along the peripheral direction, and the outer protruding ribs of the valve inner sleeve are rotatably located at a high position or a low position of the guide boss. The exhaust valve device adopting the valve core is good in sealing performance and low in manufacturing cost.

Description

technical field [0001] The invention belongs to the technical field of household appliance hardware product manufacturing, and in particular relates to an exhaust valve device for a pressure vessel. Background technique [0002] Existing exhaust valves for pressure cookers, the valve core used as a seal is usually made of metal smooth materials, such as valve cores made of 304 stainless steel or copper, and the valve core of this structure requires high surface finish Higher, otherwise the sealing performance will be greatly reduced; if ordinary plastic is used as the valve core, it needs to go through multiple injection molding processes, and the selected plastic material is unqualified, which will directly affect the food hygiene and safety of the product. Therefore, the existing spool has very high requirements on materials and manufacturing techniques, and is expensive. In addition, the current pressure cooker exhaust valve is usually composed of a lot of parts, the str...

AI Technical Summary

Problems solved by technology

[0002] Existing exhaust valves for pressure cookers, the valve core used as a seal is usually made of metal smooth materials, such as valve cores made of 304 stainless steel or copper, and the valve core of this structure requires high surface finish Higher, otherwise the sealing performance will be greatly reduced; if ordinary plastic is used as the valve core, multiple injection molding processes are required, and the plastic material is unqualified, which will directly affect the food hygiene and safety of the product

Therefore, the existing spool has very high requirements on materials and manufacturing processes, and the cost is expensive.

In addition, the current pressure cooker exhaust valve is usually composed of a lot of parts, the structure is relatively complicated, and the manufacturing cost is also very high

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