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Erosion-prevention stop valve seal pair

A shut-off valve and sealing pair technology, which is applied to lift valves, valve devices, engine components, etc., can solve the problems of poor sealing effect and shortened service life of shut-off valves, reduce erosion and corrosion, increase production costs, and simplify the process. Effect

Active Publication Date: 2011-08-03
SUNGO VALVES GRP CO LTD
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AI Technical Summary

Problems solved by technology

When the medium passes through the valve seat hole, the globe valves of these two structures have serious erosion and corrosion on the sealing surface, especially when the medium is high-temperature and high-pressure gas, the erosion and corrosion of the medium flowing along the sealing surface are more serious. , making the sealing effect of the stop valve worse and the service life shortened

Method used

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  • Erosion-prevention stop valve seal pair
  • Erosion-prevention stop valve seal pair
  • Erosion-prevention stop valve seal pair

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Embodiment Construction

[0017] see image 3 and Figure 4 , the present invention provides a sealing pair of an anti-scour stop valve, including a valve seat 1 and a valve flap 2 corresponding to each other, a valve seat hole is provided in the center of the valve seat, and the sealing surface of the valve seat is an outer cone surface, The sealing surface of the valve disc is an inner cone surface matched with the outer cone surface. For the convenience of processing and improving the sealing effect of the sealing surface, the outer cone surface of the valve seat and the inner cone surface of the valve disc The valve seat hole and the valve seat hole can be arranged in a centrally symmetrical structure, and the installation method is preferably such that the centerlines of the three coincide with each other, so that the medium flowing out of the valve seat hole can evenly spread around.

[0018] In order to improve the sealing effect of the sealing pair of the shut-off valve, the outer conical surf...

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Abstract

The invention relates to an erosion-prevention stop valve seal pair which comprises a valve seat and a valve clack which are corresponding to each other; the seal surface of the valve seat is an outer conical surface; the seal surface of the valve clack is an inner conical surface which is matched with the outer conical surface; the center of the valve seat is provided with a valve seat hole; thecentral part of the inner conical surface of the valve clack is provided with a column structure which can insert in the valve seat hole; the lower end surface of the column structure is set into an arc-shaped concave surface and lower than the seal surface of the valve clack. According to the invention, on the basis of keeping the original seal effect of the stop valve seal pair, the erosion andcorrosion of a medium to the seal surface is relieved, thus the seal ring is always protected, the seal effect is more reliable, and the erosion-prevention stop valve seal pair is especially suitablefor the flow rate control of high-temperature high-pressure gas media.

Description

technical field [0001] The invention relates to a stop valve, in particular to an anti-scouring and corrosion-resistant stop valve sealing pair suitable for flow control of high-temperature and high-pressure gas medium. Background technique [0002] see figure 1 and figure 2 , The structure of the sealing pair of the cut-off valve in the prior art is a plane seal and a cone seal. The cone seal structure is that the valve seat is an inner cone, and the valve disc is an outer cone. When the medium passes through the valve seat hole, the globe valves of these two structures have serious erosion and corrosion on the sealing surface, especially when the medium is high-temperature and high-pressure gas, the erosion and corrosion of the medium flowing along the sealing surface are more serious. , making the sealing effect of the stop valve worse and the service life shortened. Contents of the invention [0003] In order to overcome the above-mentioned defects of the prior art...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/42F16K1/38F16K1/46
Inventor 王福全余克李铁东
Owner SUNGO VALVES GRP CO LTD
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