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Full-sealing zero leakage butterfly valve

A zero-leakage, fully-sealed technology, applied in the field of butterfly valves, can solve problems such as increased volume and complex structure, and achieve good sealing effect

Active Publication Date: 2011-11-02
ZHEJIANG XINTAI VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the disc valve, which can be opened and closed by rotating the disc plate at 90 degrees, the above-mentioned structure cannot be applied because the bellows cannot be deformed by radial rotation. It needs to be transformed into a linear motion by rotation, and then a mechanical transformation from the linear motion to rotary motion. mechanism, making the structure more complex and increasing in size

Method used

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  • Full-sealing zero leakage butterfly valve
  • Full-sealing zero leakage butterfly valve
  • Full-sealing zero leakage butterfly valve

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Experimental program
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Effect test

Embodiment Construction

[0009] Such as figure 1 As shown, the fully sealed zero-leakage disc valve includes a valve cover 1, a valve body 2, a disc plate 3, a valve seat 4 and a valve stem 5. The disc plate 3 is set in the valve cavity of the valve body 2, and the valve seat 4 is also set in the valve cavity. In the cavity, the lower end of the valve stem 5 passes through the valve stem 5 hole on the valve body 2 to connect with the disc plate 3 in the valve cavity, and the fully sealed zero-leakage disc valve is provided with an arc-shaped driving connecting rod with an arc length of at least 90 degrees. 6. One end of the arc-shaped drive link 6 is fixedly connected to the valve stem 5 through the radial connection portion 7, and the valve cover 1 is box-shaped as a whole to enclose the valve stem 5 and the arc-shaped drive link 6. The lower part of the bonnet 1 is in sealing connection with the valve body 2, and the position corresponding to the arc-shaped drive link 6 on the bonnet 1 is provided w...

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Abstract

The invention relates to a butterfly valve, in particular to a full-sealing zero leakage butterfly valve. A valve rod is driven by an arc-shaped driving connecting rod; a whole valve cover has a box shape and encloses the valve rod and the arc-shaped driving connecting rod therein; and a metal bellows is arranged between the end part of the arc-shaped driving connecting rod and the valve cover. Therefore, good sealing performance is achieved, and the advantage that the traditional butterfly valve can be opened and closed by rotating 90 degrees only is kept.

Description

technical field [0001] The invention relates to a disc valve, in particular to a fully sealed zero-leakage disc valve. Background technique [0002] Recently, due to the small size of the butterfly valve, the handle can be opened and closed by only turning 90 degrees, and the opening and closing is fast. The scope of use of the butterfly valve has been expanded, the variety series has increased, and the output has increased. The present butterfly valve bonnet is connected with the valve body by bolts and nuts to form a seal. However, there are two leakage points in this sealing cavity, one is the connection between the valve cover and the valve body, and the other is the valve stem rotating at the stuffing box, which also produces a matching gap. Plug in the gaps. When the temperature and pressure of the conveying medium increase, the working environment of the valve is very harsh. In order to ensure the absolute safety of conveying dangerous goods, the most fundamental wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/22F16K31/44
Inventor 葛天民
Owner ZHEJIANG XINTAI VALVE