Floating butterfly valve

A butterfly valve and valve body technology, applied in the field of floating butterfly valves, can solve problems such as low cost performance, limited application conditions, and incomplete sealing, and achieve the effects of high cost performance, small valve volume, and long service life

Inactive Publication Date: 2011-06-01
永嘉县瓯北镇老来乐机械阀门技术咨询服务中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) The sealing pair of the centerline valve shaft butterfly valve can only be a non-metallic seal, and it is a low-pressure seal (≤1.6MPa);
[0004] (2) Although the sealing pairs of double eccentric and triple eccentric butterfly valves have metal seals, they are all mandatory seals, and they are only one-way flow seals, and they cannot be completely sealed in the reverse direction, so they are generally marked with valve flow direction signs; Butterfly valve belongs to medium pressure seal (≤6.4MPa)
[0005] Due to the above-mentioned defects in the existing butterfly valves, the cost performance is low and the application conditions are limited

Method used

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing.

[0020] The specific embodiment of the present invention is as Figure 1-4 As shown, a floating butterfly valve includes a valve body, a valve stem 1 and a butterfly plate 2. The inner cavity of the valve body is provided with two spherical sealing bands 3 and 4 arranged in two directions in a concave shape, and the two spherical sealing bands 3 and 4 are opposite to the valve. The central axis of the body is arranged symmetrically; the edges on both sides of the butterfly plate 2 are respectively provided with sealing strips 21, 22, and the two spherical sealing strips 3, 4 on the valve body are in contact with the two sealing strips 21, 22 on the butterfly plate 2 respectively. Adaptation, that is, the two sealing strips 21, 22 on the butterfly plate 2 are convex spherical surfaces.

[0021] In this embodiment, the two spherical sealing bands 3, 4 on the valve body and th...

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PUM

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Abstract

The invention discloses a floating butterfly valve. The floating butterfly valve comprises a valve body, a valve rod and a butterfly plate, wherein two inward-concave spherical sealing tapes, which are arranged bidirectionally, are arranged in an inner cavity of the valve body; the two spherical sealing tapes are symmetrically arranged relative to a central axis of the valve body; sealing tapes are arranged on the edges of the two sides of the butterfly plate respectively; and the two spherical sealing tapes on the valve body are matched with the two sealing tapes on the butterfly plate respectively. The floating butterfly valve has a novel structure, a high sealing property of a ball valve and a check valve, a small volume characteristic of a butterfly valve, small flow resistance coefficient, highest cost performance and wide application.

Description

technical field [0001] The invention relates to the technical field of fluid control, in particular to a floating butterfly valve. Background technique [0002] In the prior art, there are many types of butterfly valves, which can be divided into centerline shaft butterfly valves, double eccentric butterfly valves and triple eccentric butterfly valves according to their structural forms. The above-mentioned butterfly valve mainly has the following defects: [0003] (1) The sealing pair of the centerline valve shaft butterfly valve can only be a non-metallic seal, and it is a low-pressure seal (≤1.6MPa); [0004] (2) Although the sealing pairs of double eccentric and triple eccentric butterfly valves have metal seals, they are all mandatory seals, and they are only one-way flow seals, and they cannot be completely sealed in the reverse direction, so they are generally marked with valve flow direction signs; Butterfly valves are medium pressure seals (≤6.4MPa). [0005] Due...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/226F16K27/02
Inventor 孙功珍叶金福谢雄
Owner 永嘉县瓯北镇老来乐机械阀门技术咨询服务中心
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