Slow-closing type float ball valve

Abstract

The invention discloses a slow-closing type float ball valve. A bracket is arranged in a front chamber of a valve cover, an inner cavity of the bracket is provided with a valve chamber, a leather membrane is arranged between the rear end face of an annular lug boss in the valve body and the valve cover, the middle of the leather membrane backwards deforms and extends to form a location lug boss; a check ring is arranged in an inner cavity inside the location lug boss, the rear end of the check ring penetrates through a through hole at the middle of the location lug boss and extends into a location groove on the bracket, a bolt is penetrated through an inner hole of the check ring, a gap is arranged between the bolt and the inner hole wall of the check ring and communicated with the valve chamber through a first small hole of the bracket; and a control chamber is arranged behind the valve chamber, and communicated with the valve chamber through a second small hole of the bracket. The slow-closing type float ball valve is longer in closing time, remarkably reduces adverse impact of water flow to a water supply pipeline and the valve body because the speed change of the water flow isreduced, and has the characteristics of easiness in processing and manufacturing, compact structure, easiness in assembly, reliability in control, long service life and the like.

Description

technical field [0001] The invention relates to the technical field of water valves, in particular to a slow-closing floating ball valve. Background technique [0002] The float valve is an important control element in the tank. Chinese patent ZL 200920206691.5 discloses an internally blocked floating ball valve, which is composed of a valve body, a valve cover, a valve core assembly, a film, a slider, a dial, a valve stem, and a floating ball. , the valve enters the closing process. At this time, the incoming water from the water inlet fills the valve chamber through the through hole in the center of the film, and the water pressure in the valve chamber gradually increases, pushing the film close to the annular boss until the film seals the above boss. Closing of the float valve is completed. The size of the through hole in the center of the membrane directly affects the closing time of the float valve. If the closing time of the float valve is too short, the rapidly decr...

AI Technical Summary

Problems solved by technology

The size of the through hole in the center of the film directly affects the closing time of the float valve. If the closing time of the float valve is too short, the rapidly decreasing water flow will have a great impact on the valve body and the water supply pipeline, which will affect its life.

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