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Double-sealing-pair metal sealing butterfly valve

A metal seal and double seal technology, which is applied in the direction of lift valves, valve devices, engine components, etc., can solve the problems of poor reverse sealing performance, inability to apply high-pressure bidirectional sealing medium pipelines, leakage of sealing pairs, etc., and achieve good bidirectional sealing performance Effect

Inactive Publication Date: 2015-07-22
浙江宝龙阀门制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main disadvantage is: in the reverse sealing state, when the medium pressure is high, the medium pressure will produce a thrust opposite to the sealing force on the butterfly plate, causing the valve stem to deform in the direction opposite to the sealing force, thereby causing leakage of the sealing pair. Its reverse sealing performance is poor, so it cannot be applied to high-pressure two-way sealed medium pipelines

Method used

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  • Double-sealing-pair metal sealing butterfly valve

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Embodiment Construction

[0010] Such as figure 1 The double-seal metal-sealed butterfly valve shown includes a valve body 1, a valve stem 6, a valve seat 2, a butterfly plate 4, a bracket 13, and a handwheel 18. The upper end of the valve stem 6 is connected to the handwheel 18 through a valve stem nut 17. The valve The rod nut 17 is installed in the bracket 13 by bearings, the butterfly plate 4 is installed on the lower part of the valve stem 6, and the butterfly plate 4 is made with a sealing curved surface that cooperates with the valve seat 2; a valve seat 2 is installed in the inlet and outlet channels of the valve body 1 respectively. , double butterfly plates 4 are installed on both sides of the valve stem 6, and the butterfly plates 4 on both sides cooperate with the inlet and outlet valve seats 2 to form a sealing pair, the inlet side valve seat and the inlet side butterfly plate cooperate with each other to form a reverse sealing pair, and the outlet side The valve seat and the butterfly pla...

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Abstract

The invention relates to a double-sealing-pair metal sealing butterfly valve. The double-sealing-pair metal sealing butterfly valve comprises a valve body, a valve rod, valve seats, butterfly plates, a support and a hand wheel. The upper end of the valve rod is connected with the hand wheel through a valve rod nut. The interior of an entrance channel and the interior of an exit channel of the valve body are respectively provided with a valve seat. Double butterfly plates are installed on the two sides of the valve rod respectively, and are matched with an entrance valve seat and an exit valve seat respectively to respectively form a sealing pair. The butterfly plates are installed on the valve rod through vertical connecting buckles, wherein one side of each connecting buckle is fixedly connected on the back of a butterfly plate, and the other side of each connecting buckle is movably matched with a slope on the valve rod. A propped slope is arranged between the butterfly plates and is matched with the slope in the middle of the valve rod. An L-shaped guide groove is formed in the upper end of the valve rod and is matched with a guide pin on the support. The sealing performance of the butterfly valve and a forward-direction medium and the sealing performance of the butterfly valve and a reverse medium are the same. The double-sealing-pair metal sealing butterfly valve is good in double-direction sealing performance, and suitable for high-temperature, high-pressure, and double-direction sealing medium pipelines.

Description

technical field [0001] The invention relates to the field of valves, in particular to a bidirectional metal sealing butterfly valve. The invention is suitable for valves of high-temperature, high-pressure and two-way sealed medium pipelines. Background technique [0002] Butterfly valves are widely used in medium conveying pipelines in various fields of the national economy because of their simple structure, convenient opening and closing, and low cost. According to the sealing structure, the butterfly valve can be divided into hard sealing structure and soft sealing structure. According to the product structure, it can be divided into flat extrusion type, double eccentric, triple eccentric and other forms. The triple eccentric butterfly valve has the characteristics of high sealing specific pressure and good sealing performance. A form commonly used at present. For example, the two-way metal-sealed butterfly valve with patent No. 200810189062.6 includes a valve body, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/36F16K1/44
Inventor 邝芝书
Owner 浙江宝龙阀门制造有限公司
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