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High pressure resistant eccentric butterfly valve

An eccentric butterfly valve, high-pressure-resistant technology, applied in the direction of lifting valve, valve detail, valve device, etc., can solve the problems of poor pressure resistance, poor sealing reliability, leakage of conveying medium, etc., and achieve the purpose of improving service life and pressure resistance Effect

Inactive Publication Date: 2016-10-05
JIANGSU ZHONGHAO MARINE VALVE MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The valve stem of the existing eccentric butterfly valve is supported on the valve body by the upper bushing and the lower bushing arranged up and down. The valve stem cooperates with the upper bushing and the inner hole of the lower bushing. The shaft sleeve and the inner hole of the lower shaft sleeve leak, the sealing reliability is poor, and the pressure resistance performance is poor

Method used

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Embodiment Construction

[0016] The present invention will be further described below according to the accompanying drawings and in conjunction with the embodiments.

[0017] The high-pressure resistant eccentric butterfly valve shown in the accompanying drawings includes a valve stem 1, a valve plate 2, a valve body 3, an upper bushing 4 and a lower bushing 5. In this embodiment, the valve stem 1 and the valve plate 2 are connected by a spline structure ; The upper shaft sleeve 4 and the lower shaft sleeve 5 are respectively arranged on the upper and lower parts of the valve body 3. In this embodiment, the inner surface of the upper shaft sleeve 4 and the lower shaft sleeve 5 is respectively provided with a metal wear-resistant coating; the valve stem 1 passes through The upper shaft sleeve 4 and the lower shaft sleeve 5 arranged up and down are supported on the valve body 3; the surface of the valve stem 1 in the inner hole of the upper shaft sleeve 4 is provided with two ring grooves at intervals, a...

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Abstract

The invention discloses a high pressure resistant eccentric butterfly valve. The high pressure resistant eccentric butterfly valve comprises a valve rod, a valve plate, a valve body, an upper shaft sleeve and a lower shaft sleeve; the upper shaft sleeve is arranged at the upper portion of the valve body, and the lower shaft sleeve is arranged at the lower portion of the valve body; the valve rod is supported on the valve body through the upper shaft sleeve and the lower shaft sleeve which are arranged up and down; two ring grooves are formed in the positions, in an inner hole of the upper shaft sleeve, of the surface of the valve rod in a spaced manner, a sealing ring is arranged in each ring groove, and a dual radial shaft sealing structure is formed; and two ring grooves are formed in the positions, in an inner hole of the lower shaft sleeve, of the surface of the valve rod in a spaced manner, a sealing ring is arranged in each ring groove, and a dual radial shaft sealing structure is formed. A further improvement is that metal wear-resistant coatings are arranged on the surface of the inner hole of the upper shaft sleeve and the surface of the inner hole of the lower shaft sleeve; and the valve rod and the valve plate are connected through a spline structure. The high pressure resistant eccentric butterfly valve is reliable in sealing, the leakage amount of the valve is less, high pressure resistance is achieved, and the service life is long.

Description

technical field [0001] The invention relates to a valve, in particular to an eccentric butterfly valve. Background technique [0002] Eccentric butterfly valves are widely used in industrial pipelines such as metallurgy, electric power, petrochemical industry, water supply and drainage, and municipal construction to regulate flow and cut off fluid. The valve stem of the existing eccentric butterfly valve is supported on the valve body through the upper bushing and the lower bushing arranged up and down. The valve stem cooperates with the inner hole of the upper bushing and the lower bushing. The shaft sleeve and the inner hole of the lower shaft sleeve leak, the sealing reliability is poor, and the pressure resistance performance is poor. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the invention proposes a high-pressure-resistant eccentric butterfly valve that can significantly improve sealing reliability and pressure-resistant performa...

Claims

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Application Information

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IPC IPC(8): F16K1/22F16K41/02F16K1/48F16K27/08
CPCF16K1/2268F16K1/224F16K1/48F16K27/08
Inventor 全文章李顺明
Owner JIANGSU ZHONGHAO MARINE VALVE MFG
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