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High-pressure butterfly valve

A butterfly valve and high pressure technology, which is applied in the field of large-diameter high-pressure butterfly valves, can solve the problems of huge valve structure and high pressure, and achieve the effect of wide application, saving valve opening and simple structure.

Active Publication Date: 2015-05-13
JIANGSU SHENTONG VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

When the butterfly valve is used in a large-diameter pipeline, especially under high-pressure conditions, the medium in the pipeline exerts a lot of pressure on the butterfly plate. When it is opened, the valve stem bears a large torque. It is also very large, and the output torque of the supporting drive device is correspondingly large, resulting in a huge structure of the valve.

Method used

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Embodiment Construction

[0013] Such as figure 1 , 2 As shown, a high-pressure butterfly valve includes a valve body 9, an upper valve stem 2, a lower valve stem 7 and a large butterfly plate 6. The valve body 9 is provided with a valve seat 8, and the large butterfly plate 6 is fixed with an upper valve stem 2 and a large butterfly plate. The lower valve stem 7, the upper valve stem 2 and the lower valve stem 7 are coaxially arranged and can rotate relative to the valve body 9. The large butterfly plate 6 is tightly matched with the valve seat 8. The large butterfly plate 6 has a through hole and a small valve Seat 4, the upper valve stem 2 is connected with the driving device through the coupling 1, a small valve stem 3 is provided in the upper valve stem 2, one end of the small valve stem 3 is fixedly connected with the coupling 1, and the other end is fixedly connected with a The small valve seat 4 is sealed with the small butterfly plate 5, the upper end surface of the upper valve stem 2 is prov...

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Abstract

A high-pressure butterfly valve comprises an upper valve body, an upper valve stem, a lower valve stem and a large butterfly plate. The upper valve stem is connected with a drive unit through a coupling joint, a small valve stem is sleeved with the upper valve stem in an empty manner, one end of the small valve stem is fixedly connected with the coupling joint while the other end fixedly connected with a small butterfly plate hermetically matched with the small valve stem, a groove is formed in the upper end face of the upper valve stem, a fan-shaped boss arranged on the lower end face of the coupling joint can rotate in the groove and performs range limit through the step plane of the groove, and the convex surface formed on the upper end face, after provided with the groove, of the upper valve stem is abutted against the concave surface formed in the lower end face, after provided with the fan-shaped boss, of the coupling joint. By the arrangement, valve opening torque is greatly reduced, valve opening is more labor saving, and cost is saved.

Description

Technical field [0001] The invention relates to a butterfly valve, in particular to a large-caliber high-pressure butterfly valve. Background technique [0002] The existing butterfly valve is mainly composed of a valve body, a valve stem and a butterfly plate. The valve body is provided with a valve seat. The butterfly plate is fixed to the valve stem. Fits and seals. When the butterfly valve is used in a large-diameter pipeline, especially under high-pressure conditions, the medium in the pipeline exerts a lot of pressure on the butterfly plate. When it is opened, the valve stem bears a large torque. It is also very large, and the output torque of the supporting driving device is correspondingly also very large, resulting in a huge structure of the valve. Contents of the invention [0003] In order to overcome the above-mentioned shortcomings of the existing butterfly valve, the present invention provides a high-pressure butterfly valve with simple structure and small ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/22F16K1/36F16K1/48
CPCF16K1/22F16K1/36F16K1/48
Inventor 张逸芳陆平王建新周宏韬
Owner JIANGSU SHENTONG VALVE
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