Anti-seepage device above butterfly valve rotary shaft

A rotating shaft, anti-leakage technology, used in valve devices, lift valves, engine components, etc., can solve problems such as inability to achieve complete sealing, achieve the effects of easy introduction, good chemical stability, and reduce the possibility of injury

Inactive Publication Date: 2015-11-04
天津市精沃阀门科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Butterfly valves are widely used, suitable for flow regulation, used in petroleum, petrochemical, chemical, metallurgy, electric power and other fields, in -10-150 degrees of fresh water, sewage, sea water, salt water, steam, natural gas, food, medicine, oil and various Acid and alkali pipelines are required to be completely sealed. Butterfly valves commonly used in the market are only sealed with a sealing ring above the rotating shaft, which cannot meet the requirements of complete sealing. Therefore, it is necessary to provide a simple and practical anti-leakage device to solve the problem. above questions

Method used

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  • Anti-seepage device above butterfly valve rotary shaft
  • Anti-seepage device above butterfly valve rotary shaft

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Embodiment Construction

[0008] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0009] Such as figure 1 As shown, the present invention is an anti-leakage device above the rotating shaft of a butterfly valve, including a round tube 1, an O-ring 2 and a sealing ring 3. The overall material of the round tube 1 is brass, which has stable chemical properties and is not easily corroded. The outside of the round pipe 1 includes rounded corners 11 at both ends. The rounded corners here belong to passivation treatment, which facilitates the introduction of the round pipe during the assembly process with the butterfly valve body, and also reduces the injury rate of the operator to a certain extent. The round pipe 1 It also includes the outer knurled pattern 12, which increases the friction coefficient during the interference fit between the round tube 1 and the valve body. After the assembly is completed, it is more conducive to t...

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Abstract

The invention provides an anti-seepage device above a butterfly valve rotary shaft. The anti-seepage device comprises a circular pipe, an O-shaped ring and a sealing ring. The outer portion of the circular pipe is matched with the valve body, and the inner portion of the circular pipe is matched with the butterfly valve rotary shaft. Two parallel grooves are formed in the circular pipe, and the O-shaped ring and the sealing ring are installed in the corresponding grooves. The circular pipe is made of brass, so that the chemical property is stable, and the circular pipe is not likely to be corroded; a knurled thread is arranged on the outer portion, so that friction force is increased, and installation and match stability is guaranteed; and the center lines of the O-shaped ring and the sealing ring are located on the same axis, dual protection is achieved, the sealing performance of the device is guaranteed, and the service life of a butterfly valve is prolonged through the whole structure.

Description

technical field [0001] The invention belongs to the field of an anti-leakage device above the rotating shaft of a butterfly valve, and in particular relates to an anti-leakage device installed inside a butterfly valve that prevents penetration and corrosion. Background technique [0002] Butterfly valves are widely used, suitable for flow regulation, used in petroleum, petrochemical, chemical, metallurgy, electric power and other fields, in -10-150 degrees of fresh water, sewage, sea water, salt water, steam, natural gas, food, medicine, oil and various Acid and alkali pipelines are required to be completely sealed. Butterfly valves commonly used in the market are only sealed with a sealing ring above the rotating shaft, which cannot meet the requirements of complete sealing. Therefore, it is necessary to provide a simple and practical anti-leakage device to solve the problem. above question. Contents of the invention [0003] The problem to be solved by the present inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/226F16K1/32
CPCF16K1/226F16K1/2268F16K1/32
Inventor 李继元刘凯
Owner 天津市精沃阀门科技有限公司
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