Low pressure drop high-temperature gas changing-over valve

Abstract

The invention relates to a high-temperature gas reversing valve with low pressure drop, comprising a valve body with an air inlet and two air outlets, the cross-sectional area of ​​the two air outlets is equal to that of the air inlet; a rotatable valve rod is arranged in the valve body , the rotation centerline of the valve stem is located on the symmetrical neutral plane of the centerlines of the two air outlets, and one end extends to the outside of the valve body; two bonnets are connected to the valve stem; The sealing surface perpendicular to the centerline of the air outlet; on the plane perpendicular to the central axis of valve stem rotation, the projected angle between the sealing surfaces on the two bonnets is less than or equal to the remainder of the projected angle between the centerlines of the two air outlets horn. In this way, the valve stem can drive the two bonnets to rotate under the drive of external force, thereby sealing a corresponding gas outlet, and the other bonnet becomes a part of the side wall of the gas channel, so that the flow resistance of the gas in the valve body is reduced, thereby obtaining a A low-pressure drop high-temperature gas reversing valve with small pressure loss and high sealing performance in high-temperature environments.

Description

technical field [0001] The invention relates to a high-temperature gas valve, more specifically, to a high-temperature gas reversing valve with low pressure drop. Background technique [0002] In the prior art, traditional valves usually include a valve body, a valve cover and a rotating shaft. The valve body includes an air inlet and an air outlet. on and off. However, this kind of valve body is not suitable for high-temperature gas with pressure drop requirements. First, the pressure drop of the flow is large, and the energy loss of the gas during flow is large. Second, the current valve with good sealing performance cannot be used for high temperature. environment. [0003] Metal hard-sealed high-temperature ball valves are usually used for reversing control of high-temperature gases. When it is necessary to change the direction of high-temperature gas, the following gas pipe connection structure is usually adopted, that is, a three-way pipe is used to divide the gas i...

AI Technical Summary

Problems solved by technology

However, this design has great resistance to the gas flowing in the pipeline, which makes the energy loss of the gas flow very large, resulting in a large pressure drop; and the structure, processing and fit of the ball valve are very complicated.

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