Butterfly ball valve
A ball valve and butterfly technology, applied in the field of ball valves, can solve the problems of short service life, easy wear of sealing pairs, affecting valve sealing performance, etc., and achieve the effects of long service life, good sealing performance and reducing frictional wear.
Active Publication Date: 2013-05-01
浙江宝龙阀门制造有限公司
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Problems solved by technology
The disadvantage is that it requires high processing roundness of the ball, and the roundness error of the ball directly affects the sealing performance of the valve. In addition, during the opening and closing process of the valve, there is frictional wear between the sealing surface of the ball and the sealing surface of the valve seat, and the sealing pair is easy to wear after repeated opening and closing. And leakage, unreliable sealing performance, short service life of the product
Method used
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Embodiment Construction
[0010] like figure 1 The butterfly ball valve shown includes a valve body, a ball body 6, a valve stem, and a transmission device 14. The valve stem is composed of an upper valve stem 10 and a lower valve stem 4. A valve seat is arranged at the outlet port of the valve body, and the ball body 6 is made with a through hole equal to the diameter of the valve body channel. When the valve is opened, the through hole of the ball body 6 is aligned with the valve body channel, so that the medium can flow unobstructed, and the sealing surface of the ball body 6 It has a sealing surface that cooperates with the sealing surface of the valve seat. The valve body is connected by the left valve body 5 and the right valve body 8 through the bolt 2, the upper end of the upper valve rod 10 is fixedly connected with the transmission device 14, the lower end is fixedly connected with the ball 6 by the flat key 9, and the lower valve rod 4 is installed on the ball. 6. Between the lower end and ...
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The invention relates to a butterfly ball valve, which comprises a valve body, a ball body, a valve stem and a transmission device. The butterfly ball valve is mainly characterized in that the sealing surface of the ball body is formed by fixedly arranging a sealing ring on the ball body through a pressing plate, the sealing ring is provided with a conical sealing surface, the sealing surface of a valve seat is provided with a conical sealing surface matched with the sealing ring, the centerline of the taper angle of the conical sealing surface and the centerline of a channel of the valve body form an eccentric angle, a sealing contact surface formed in matching of the sealing ring and the sealing surface of the valve seat and the axial line of the valve stem form an eccentric distance, the eccentric distance is larger than the diameter of the channel of the valve body, the axial line of the valve stem and the centerline of the channel of the valve body form an eccentric quantity, andthe eccentric quantity is arranged on one side of the minimum taper angle between the sealing surface of the valve seat and the centerline of the channel of the valve body. The advantages of a ball valve and three eccentric butterfly valves are integrated, and the sealing performance of the ball valve can be prevented from being affected by the roundness of the ball body. The ball valve has the advantages of good sealing performance, long service life and the like and is suitable for opening and closing of various medium pipelines.
Description
technical field [0001] The present invention relates to the field of valves, in particular to a ball valve. Background technique [0002] Ball valves are widely used in various medium conveying pipelines because of their simple structure, convenient opening and closing, and small flow resistance. For example, the eccentric metal hard-sealed ball valve with the patent publication number CN2337364 is composed of a valve body, a valve seat, a sphere, a valve stem, a sphere support column, a seal and a mounting piece. , The valve body and the valve seat are completely mechanically sealed, which has the advantages of uniform sealing force, good sealing performance, easy opening and closing, small wear on the sealing surface, and high applicable pressure and temperature. The disadvantage is that the roundness of the ball is required to be processed, and the roundness error of the ball directly affects the sealing performance of the valve, and during the valve opening and closing ...
Claims
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IPC IPC(8): F16K5/06F16K27/06
Inventor 邝芝书王延军吴明军刘文吴孟丁锦才李建国
Owner 浙江宝龙阀门制造有限公司