High-pressure channelization sealing slurry valve

A technology of high-pressure pipeline and sealing material, applied in the direction of lift valve, valve device, engine components, etc., can solve problems such as shortening valve life, and achieve the effect of prolonging leakage path, prolonging shutdown and maintenance period, and huge economic benefits.

Active Publication Date: 2009-07-08
浙江高中压阀门有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flow rate of the medium passes through at a speed of more than 10 m / s, and a hole is torn on the sealing surface almost instantly, and the high-speed liquid flow will generate a large amount of cavitation phenomenon behind the pipe, which greatly shortens the service life of the valve

Method used

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  • High-pressure channelization sealing slurry valve
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Embodiment Construction

[0016] The high-pressure pipeline sealing slurry valve as shown in the figure includes a valve disc 2, a valve stem 1 connected to the valve disc, and a valve seat 4 sealingly matched with the valve disc. The lower part of the valve disc 2 is provided with a Sealing port guide device, the seal port guide device includes a bent part 5 formed at the lower part of the valve disc at the valve seat, and there is an axially arranged secondary seal between the side wall of the bent part 5 and the valve seat pair, the pair of sealing pairs adopts plane and plane sealing, and a diversion port 6 is formed at its lower part. A main sealing pair is formed between the valve seat and the disc, which is located above the flow guiding device at the sealing port. It adopts a spherical surface-to-spherical sealing structure made of tungsten carbide, and the radius of the two sealing spherical surfaces is the same. A high temperature resistant "O" type rubber sealing ring 3 is provided on the ju...

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Abstract

The invention relates to a slurry valve used in a high-pressure pipelined alumina powder production line. The sealing surface of the existing slurry valve is washed by the high-speed hard particle slurry, and the sealing surface of the slurry valve is severely worn, which greatly shortens the service life of the valve. The present invention includes a valve disc, a valve rod connected to the valve disc and a valve seat sealingly matched with the valve disc, and is characterized in that a sealing opening guide device is provided at the lower part of the valve disc, and a valve seat located between the valve disc and the valve disc is formed. The main sealing pair above the sealing port guide device adopts a spherical surface-to-spherical sealing structure made of high-hardness materials. High-speed slurry flow generally occurs in the late stage of valve closing or early stage of opening. The sealing port guide device can extend the leakage path and increase the leakage flow resistance in the valve seat channel, thereby reducing the flow rate of slurry flowing through the main sealing pair. The service life of the slurry valve is extended, that is, the maintenance cycle of the alumina production line is extended, which brings huge economic benefits.

Description

technical field [0001] The invention relates to a slurry valve, in particular to a slurry valve used in a high-pressure pipelined alumina powder production line. Background technique [0002] In order to continuously reduce the production cost of alumina and increase the output, Zhengzhou Aluminum Plant proposed a brand-new alumina powder production technology, which imported pipelined alumina powder production technology from Germany, and increased the pressure of the pipeline to 11.0MPa (formerly Bayer process oxidation The pipeline pressure of the aluminum powder production line is 6.4MPa), the caliber of the main pipeline is reduced from 250mm produced by the Bayer process to 100-150mm, and the pressure flow rate of the pipeline increases. Wear and shock resistant. [0003] This pipeline process produces alumina powder with low cost, high output and easy installation. The working principle of the pipelined alumina powder production line is similar to that of the Bayer ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/00F16K1/36F16K1/42
Inventor 文体杰盛吉生王菲
Owner 浙江高中压阀门有限公司
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