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Four-eccentricity butterfly valve

A four-eccentric, butterfly valve technology, applied in the direction of lift valve, valve detail, valve device, etc., can solve the problems of sealing performance to be improved, leakage, etc.

Active Publication Date: 2020-04-03
HEYUAN FLOWTECAL AUTOMATIC CONTROL VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the upper and lower points of the existing triple eccentric sealing butterfly valve are prone to leakage, and the sealing performance needs to be improved.

Method used

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  • Four-eccentricity butterfly valve
  • Four-eccentricity butterfly valve
  • Four-eccentricity butterfly valve

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Embodiment Construction

[0018] The following will describe in detail with reference to the accompanying drawings in conjunction with the embodiments, so as to further explain the technical features and advantages of the present invention.

[0019] Such as Figure 1-5 As shown, a four-eccentric butterfly valve of the present invention includes a valve body 2, a valve stem 1 and a bottom cover 6 are arranged on the valve body, a butterfly plate 8 is fixed on the valve stem, and the butterfly plate rotates to realize the opening and closing of the flow channel of the valve body. The sealing ring 7 embedded on the butterfly plate is in contact with the valve seat 9 welded on the inner wall of the valve, and an eccentric distance a is set between the center line of the valve stem and the neutral plane of the valve seat, and the center line of the valve stem is in contact with the valve seat. There is an eccentricity b between the centerlines of the runners of the valve body, the angle between the centerli...

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Abstract

The invention discloses a four-eccentricity butterfly valve which comprises a valve body, wherein a valve rod and a bottom cover are disposed on the valve body; a butterfly plate is fixed on the valverod; a flow channel of the valve body is opened and closed through rotation of the butterfly plate; a seal ring embedded on the butterfly plate gets contact with a valve base welded on the inner wallof the valve body; an eccentric distance a is set between the center line of the valve rod and a neutral plane of the valve base; an eccentric distance b is set between the center line of the valve rod and the flow channel center line of the valve body; an included angle between a projected center line of a rotation center line of the valve base on an A-A profile of the valve base and the flow channel center line is alpha; the A-A profile of the valve base is a valve base semi-profile perpendicular to the center line of the valve rod; a B-B profile of the valve base is formed after rotation of the A-A profile of the valve base around an axis C by a rotation angle of beta; the rotation center line of the valve base is located on the B-B profile of the valve base; and the included angle alpha is equal to the included angle beta. The device disclosed by the invention has the beneficial effects that a fourth eccentric amount is set, so the included angles between positions of upper and lower point-sealing faces and a conical rotation center line product are different, so firm wedging can be realized when the valve is closed.

Description

technical field [0001] The invention relates to the technical field of butterfly valve sealing performance improvement design, in particular to a four-eccentric butterfly valve. Background technique [0002] In the prior art, the triple eccentric butterfly valve is widely used in metallurgy, electric power, petrochemical, water supply and drainage and municipal construction and other industrial pipelines where the medium temperature is ≤ 425 ° C. It is used for regulating flow and carrying and breaking fluid. Material is divided into: cast iron, cast steel, stainless steel. In terms of the structure of the triple eccentric butterfly valve, the axis of the valve stem deviates from the center of the disc and the center of the body at the same time, and the rotation axis of the valve seat has a certain angle with the axis of the valve body channel. However, the upper and lower points of the existing triple eccentric sealing butterfly valve are prone to leakage, and the sealing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/226F16K1/42F16K27/02
CPCF16K1/2261F16K1/42F16K27/0218
Inventor 唐春荣
Owner HEYUAN FLOWTECAL AUTOMATIC CONTROL VALVE
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