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Fire-resistant butterfly valve

A butterfly valve, refractory technology, applied in the direction of lift valve, valve device, engine components, etc., can solve the problem of inapplicability, and achieve the effect of simple structure, excellent sealing performance and low production cost

Pending Publication Date: 2021-01-29
上海沪东造船阀门有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the sealing rings are made of plastic material, which is not suitable for use in fire-prone conditions.

Method used

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Embodiment Construction

[0019] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0020] Such as Figure 1-2 As shown, the present invention discloses a fire-resistant butterfly valve, which includes a valve body 1, a butterfly plate 2, a rotating shaft 3, a sealing ring 4 and a pressure ring 5; wherein, the butterfly plate 2 is placed in the inner cavity of the valve body 1, The rotating shaft 3 is connected with the valve body 1, the butterfly plate 2 is fixedly connected with the rotating shaft 3, and the rotating shaft 3 can drive the butterfly plate 2 to rotate to realize the opening o...

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Abstract

The invention discloses a fire-resistant butterfly valve which comprises a valve body, a butterfly plate, a rotating shaft, a sealing ring and a pressing ring. The butterfly plate is arranged in an inner cavity of the valve body and is connected with the valve body through the rotating shaft, the butterfly plate is fixedly connected with the rotating shaft, and the butterfly plate can be driven torotate by rotating the rotating shaft so as to open or close the valve. The sealing ring is fixed into the valve body cavity through the pressing ring and further located between the valve body and the butterfly plate. The sealing ring comprises a first sealing piece and a second sealing piece. The first sealing piece abuts against the peripheral side of the butterfly plate, the valve body and the pressing ring when the valve is in a closed state, and the second sealing piece is partially embedded into the first sealing piece, so that the second sealing piece only abuts against the valve bodyand the pressing ring. The fire-resistant butterfly valve disclosed by the invention can meet the double working condition requirements of the normal temperature and high temperature, excellent sealing performance under severe critical working conditions is ensured, and life and property safety is guaranteed.

Description

technical field [0001] The invention relates to the field of valves, in particular to a novel fire-resistant butterfly valve. Background technique [0002] Butterfly valve refers to a valve whose closing part is a disc, which rotates around the valve shaft to achieve opening and closing. It is mainly used for cutting and throttling on the pipeline. When the valve is used in fire-prone conditions, such as petrochemical or metallurgical fields, due to the potential danger of fire, it is often specially designed so that the valve still has certain sealing properties after being burned for a certain period of time. operational performance. [0003] The existing butterfly valve structure generally adopts extrusion type sealing, which is achieved by squeezing the protruding part of the sealing ring by the butterfly plate to deform the sealing ring and close the two together to achieve sealing. The greater the pressure of the butterfly plate, the tighter the sealing. The greater ...

Claims

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Application Information

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IPC IPC(8): F16K1/226F16K1/46
CPCF16K1/2263F16K1/2265F16K1/465
Inventor 邹帆俞垚钱海峰王大玮夏明卢智明
Owner 上海沪东造船阀门有限公司
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