Low leakage type pot cover valve

Abstract

The invention discloses a low leakage type pot cover valve. The low leakage type pot cover valve comprises an upper valve body (6), a lower valve body (1), a valve core (2), a valve rod (21) and a valve seat (7), wherein a plate spring (12) is arranged on the inner wall of the lower valve body (1), and the plate spring (12) is connected with the valve core (2) through a bracket (13); and the valve seat (7) is a one-way valve seat, and the one-way valve seat (7) is positioned between the upper valve body (6) and the upper part of the valve core (2). According to the low leakage type pot cover valve disclosed by the invention, the floating principle of the valve core is utilized, and the increase in pressure and temperature of a steam cooker causes the valve core to ascend and enables the upper part of the valve core to be abutted against the one-way valve seat, so that sealing specific pressure is increased and sealing is more reliable; and the unique design of the plate spring can enable the lower valve body to provide stronger pre-tightening force for the valve core, so that when the pot cover valve is under low pressure, the pot cover valve can ensure the effective sealing between the valve core and the one-way valve seat, as well as between the valve core and the upper valve body. The sealing effect of the pot cover valve disclosed by the invention is very ideal, the service life is obviously prolonged, and the pot cover valve is particularly suitable for steam cookers.

Description

Technical field [0001] The invention relates to a valve, in particular to a ball valve. Background technique [0002] In recent years, with the rise of paper pulping displacement cooking technology, a large number of lid valves installed at the inlet of the cooking pot have been widely used. This lid valve belongs to the class of ball valves. Its application realizes automatic filling of materials and greatly improves the efficiency of filling materials. effectiveness. The existing pot cover valve is composed of an upper valve body, a lower valve body, a valve core (spherical), a valve stem, a valve seat, etc., among which: the valve core is installed on the valve stem, and the valve seat is designed for upper and lower double valve seats to seal Function, the valve core sealing surface is two upper and lower. The lid valve is especially used to open and close the cooking pot. The hard-seal valve seat and the valve core are always in contact with each other, resulting in relati...

AI Technical Summary

Problems solved by technology

Especially when the pot cover valve is specially used to open and close the cooking pot, the hard seal valve seat and the valve core are always in contact, the wear is relatively large, the service life is short, and the sealing effect is not ideal, so it cannot be well applied to the cooking pot

In addition, the inner cavity of the pot cover valve sometimes has retention of fiber raw materials, which can easily cause the valve to be stuck and cause the cooking system to operate abnormally.

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