Regulating valve molded line structure and regulating valve

Abstract

The invention provides a regulating valve molded line structure and a regulating valve adopting the same. The regulating valve molded line structure comprises a valve disc molded line and a valve seatmolded line, wherein the valve disc molded line is arranged on a valve disc, the valve disc molded line comprises a sealing section molded line, a flow control section molded line and a valve disc head molded line which are connected in sequence, The valve seat molded line is arranged on a valve seat, the flow control section molded line comprises a first tangent section molded line, an arc-shaped section molded line and a second tangent section molded line which are connected in sequence, the arc-shaped section molded line is provided with a first end point and a second end point, the firsttangent section molded line and the arc-shaped section molded line are tangent at the first end point, the second tangent section molded line and the arc-shaped section molded line are tangent at thesecond end point, the first tangent section molded line is connected with the sealing section molded line, and the second tangent section molded line is connected with the valve disc head molded line.The molded line structure has high flow adjusting precision under the working condition of small opening, and meanwhile it can be guaranteed that the molded line structure has high through-flow capacity under the working condition of full opening.

Description

technical field [0001] The invention relates to the technical field of regulating valves, in particular to a regulating valve profile structure and a regulating valve. Background technique [0002] The steam inlet valve of the steam turbine is used to control and adjust the high-temperature and high-pressure steam from the boiler to adapt to the changing requirements of the start-up and output power of the steam turbine. For steam turbines that traditionally operate in a unit system, the sliding pressure start-up method is mostly used. During the start-up process, the steam parameters before the valve are low, and the corresponding steam volume capacity is relatively large, so the adjustment accuracy requirements for the small opening of the steam inlet valve are required. relatively low. At present, steam turbines operating in a unit system are equipped with relatively mature steam inlet regulating valves, and the development of the profile is more concerned with the adjus...

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a regulating valve profile structure and a regulating valve, which are used to solve the problem that the existing steam inlet regulating valve has a low adjustment accuracy of the steam flow at a small opening. technical issues

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