V-shaped ball valve with valve element suitable for large-temperature-difference flow system

Abstract

The invention discloses a V-shaped ball valve with a valve element suitable for a large-temperature-difference flow system. A valve element is arranged in a valve body; a main body of the valve element is a hemispherical shell; a valve hole is formed in the hemispherical shell; the inner surface of the valve hole comprises an arc-shaped surface; the two circumferential side edges of the arc-shapedsurface are connected with one side edges of two symmetrical and parallel rectangular planes; an arc surface is connected between the other side edges of the two rectangular planes; the valve hole forms a medium circulation channel composed of a quasi-circular side circulation channel and a long and narrow side circulation channel on the hemispherical shell; and the ratio of the length of the quasi-circular side circulation channel to the length of the medium circulation channel and the ratio of the length of the long and narrow side circulation channel to the length of the medium circulationchannel are 1 / 2. For a large-temperature-difference flow system, the flow requirements of all branches are low, so that the requirement for small flow adjustment of the valve is high. By changing thestructure of a valve hole in a valve element of a traditional V-shaped ball valve, the flow adjusting precision in different available differential pressure branches can be effectively improved, so that the adjusting sensitivity of the branch with the large available differential pressure is improved.

Description

technical field [0001] The invention relates to a heating pipe network balance regulating valve, in particular to a high-precision valve suitable for a flow system with a large temperature difference. Background technique [0002] At present, the phenomenon of hydraulic imbalance and thermodynamic imbalance in the operation of the heating system generally occurs, and the resulting energy consumption accounts for about 30% of the total energy consumption. Due to the unpredictable outdoor weather and the different living habits of each user, the irregularity of the load change of the heating network is increased, and it is necessary to use the regulating valve to adjust the hydraulic balance. At present, ball valves or V-shaped ball valves are mostly used as spools of regulating valves, but in the actual adjustment process, the advantages of easy adjustment of ball valves are not rationally used, resulting in low precision in heat supply adjustment, resulting in hydraulic imba...

AI Technical Summary

Problems solved by technology

At present, the existing ball valves have not made targeted changes to improve the adjustment accuracy, but only conducted research on the valve characteristic curve and other aspects, and the actual application effect is poor.

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