High-strength corrosion-resistant butterfly valve
A corrosion-resistant, high-strength technology, which is applied in the field of butterfly valves and high-strength corrosion-resistant butterfly valves, can solve the problems of O-ring sealing performance reduction, valve service life shortening, and corrosion resistance, etc., to prolong service life and strengthen anti-wear performance , Improve the effect of strength and toughness
Inactive Publication Date: 2017-05-24
TIANJIN WUNIU SHENGTE VALVE CO LTD
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Problems solved by technology
The disadvantage is that it is not resistant to corrosion. Since rubber is the product of condensation of organic compounds, according to the principle of similar compatibility, all organic reagents can corrode rubber. In addition, strong acids, strong alkalis, iodine, ferric chloride and other oxidizing substances can also corroded rubber
Therefore, in the above-mentioned solvent or acid-base environment, the sealing performance of the O-ring will be reduced after long-term use, resulting in a shortened service life of the valve.
Method used
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[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings and through specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.
[0015] A high-strength corrosion-resistant butterfly valve, including a valve body 9, a valve stem 1, and a valve plate 10, the valve stem is coaxially installed in the valve body, the valve plate is coaxially installed on the lower part of the valve stem, and the bearing 8 is sequentially installed on the upper part of the valve stem , O-ring 7, bushing 6, lower gasket 5, retaining ring 4, upper gasket 3 and circlip 2.
[0016] The structure of the O-ring is as follows Figure 2~3 As shown, its main body is a rubber ring 11, and the rubber ring is covered with a corrosion-resistant layer 12, which is made of polytetrafluoroethylene. There are multiple steel wire layers 13 or a steel wire layer coax...
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The invention relates to a high-strength corrosion-resistant butterfly valve comprising a valve body, a valve rod and a valve plate. The valve rod is coaxially sleeved with the valve body. The lower portion of the valve rod is coaxially sleeved with the valve plate. The upper portion of the valve rod is sequentially sleeved with a bearing, an O-shaped ring, a bush, a lower gasket, a check ring, an upper gasket and a snap spring. A body of the O-shaped ring is a rubber ring. The rubber ring is sleeved with a corrosion-resistant layer. Multiple steel wire layers or one steel wire layer is coaxially embedded in the rubber ring. The steel wire layers are formed by weaving steel wires. According to the butterfly valve, the rubber ring is sleeved with the corrosion-resistant layer, and the corrosion-resistant layer is made of polytetrafluoroethylene. The polytetrafluoroethylene is almost not eroded by medicine and can bear the effects of all strong acid (including aqua regia), strong oxidants, reducing agents and all types of organic solvent except molten alkali metal, fluorination media and sodium hydroxide with the temperature higher than 300 DEG C, and the O-shaped ring can be protected against any type of chemical corrosion.
Description
technical field [0001] The invention belongs to the field of valves and relates to a butterfly valve, in particular to a high-strength corrosion-resistant butterfly valve. Background technique [0002] The inner valve stem of the butterfly valve is covered with an O-ring, which acts as a seal. The used O-rings of the existing valves are made of all rubber materials. The disadvantage is that it is not resistant to corrosion. Since rubber is the product of condensation of organic compounds, according to the principle of similar compatibility, all organic reagents can corrode rubber. In addition, strong acids, strong alkalis, iodine, ferric chloride and other oxidizing substances can also corrodes rubber. Therefore, in the above-mentioned solvent or acid-base environment, the sealing performance of the O-ring is reduced after long-term use, resulting in a shortened service life of the valve. Contents of the invention [0003] The purpose of the present invention is to over...
Claims
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IPC IPC(8): F16K1/226F16K1/32F16K27/02
CPCF16K1/2268F16K1/32F16K27/0218
Inventor 孙国才
Owner TIANJIN WUNIU SHENGTE VALVE CO LTD