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A four-eccentric butterfly valve

A four-eccentric, butterfly valve technology, used in lift valves, valve details, valve devices, etc., can solve problems such as sealing performance to be improved, leakage, etc.

Active Publication Date: 2021-10-15
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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  • A four-eccentric butterfly valve
  • A four-eccentric butterfly valve
  • A four-eccentric 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-eccentric butterfly valve, which comprises a valve body, on which a valve stem and a bottom cover are arranged, on which a butterfly plate is fixed, and the rotation of the butterfly plate realizes the opening and closing of the flow channel of the valve body. The embedded sealing ring is in contact with the valve seat welded on the inner wall of the valve body. There is an eccentric distance a between the centerline of the valve stem and the neutral plane of the valve seat. The eccentricity b is set, the angle between the centerline of the valve seat rotation centerline projected on the valve seat A‑A section and the centerline of the flow channel is α, and the valve seat A‑A section is perpendicular to the valve stem centerline. Seat half section, the valve seat A-A section rotates around the axis C by an angle β to form the valve seat B-B section, the center line of the valve seat rotation is located on the valve seat B-B section, and the included angle α is equal to the included angle β. By setting the fourth eccentricity, the device of the present invention ensures that the angles between the positions of the upper and lower sealing surfaces and the product of the center line of the cone rotation are not the same, so that the valve also has a wedging effect 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 Patents(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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