High-temperature-resistant double eccentric butterfly valve
A technology with high temperature resistance and double eccentricity, applied in the direction of valve lift, valve details, valve device, etc., can solve the problems of poor high temperature resistance, high friction coefficient, non-wear resistance, etc., and achieve long service life, good high temperature resistance, The effect of improving wear resistance
Inactive Publication Date: 2017-05-10
JIANGSU HIDA MARINE VALVE
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- Abstract
- Description
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- Application Information
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Problems solved by technology
The upper and lower bearings of the double eccentric butterfly valve in the prior art are sliding bearings made of carbon steel, alloy steel or cast iron. The disadvantages of this structure are: high friction coefficient, no wear resistance, and poor high temperature resistance
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Embodiment Construction
[0020] The present invention will be further described below according to the accompanying drawings and in conjunction with the embodiments.
[0021] The high temperature resistant double eccentric butterfly valve shown in the accompanying drawings includes a valve stem 1, a valve plate 2 and a valve body 3; the valve stem 1 is respectively supported on the upper and lower parts of the valve body 3 by the upper bearing 4 and the lower bearing 5 arranged up and down; the upper bearing 4. The lower bearing 5 is a composite sliding bearing, which is composed of an outer bush and an inner bush. The outer bush is made of carbon steel, alloy steel or cast iron, and the inner bush is made of friction-resistant, high-temperature-resistant, low-friction The outer wall of the inner bush is made of high-efficiency alloy material, and the outer wall of the inner bush is provided with an annular protrusion embedded in the ring groove of the inner hole of the outer bush to closely fit; the i...
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The invention discloses a high-temperature-resistant double eccentric butterfly valve which comprises a valve rod, a valve plate and a valve body. The valve rod is supported in the valve body through an upper bearing and a lower bearing which are arranged up and down, and shaft seal structures are arranged at the combination position of the upper portion of the valve body and the valve rod and the combination position of the lower portion of the valve body and the valve rod correspondingly; a sealing ring capable of being in seal fit with a valve plate sealing face is arranged on the valve body; and the upper bearing and the lower bearing are both composite sliding bearings and are each formed by an outer bush and an inner bush in a sleeving manner, each inner bush is made of friction-resisting, high-temperature-resistant and low-friction-coefficient alloy materials, and the outer wall of each inner bush is provided with annular protrusions which are embedded into inner hole ring grooves of the outer bush for close fit. According to the further improvement, spiral oil grooves are formed in the inner walls of the inner bushes of the composite sliding bearings; the sealing ring on the valve body is a U-type stainless steel sealing ring; the valve plate sealing face is made of surfacing stainless steel or surfacing cemented carbide; and the shaft seal structures at the combination position of the upper portion of the valve body and the valve rod and the combination position of the lower portion of the valve body and the valve rod are both sealed through graphite packing. The double eccentric butterfly valve is resistant to the high temperature and friction; and during work, the opening and closing torque is small, sealing is reliable, and the service life is long.
Description
technical field [0001] The invention relates to a valve, in particular to a double eccentric butterfly valve. Background technique [0002] The double eccentric butterfly valve includes a valve stem, a valve plate and a valve body. The valve stem is respectively supported on the upper and lower parts of the valve body by the upper and lower bearings arranged up and down. The upper and lower bearings of the double eccentric butterfly valve in the prior art are sliding bearings made of carbon steel, alloy steel or cast iron. The disadvantages of this structure are: high friction coefficient, no wear resistance, and poor high temperature resistance. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the invention proposes a high-temperature-resistant double-eccentric butterfly valve with good wear resistance and high temperature resistance. [0004] The present invention achieves technical goals through the following technical solutions. [0005...
Claims
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IPC IPC(8): F16K1/22F16K1/226F16K1/36F16K41/02
CPCF16K1/224F16K1/2261F16K1/2265F16K1/2268
Inventor 田江
Owner JIANGSU HIDA MARINE VALVE