A two-stage flow regulating valve

Abstract

The invention discloses a two-stage valve. A primary valve plug assembly and a secondary valve plug assembly coaxially installed in the primary valve plug assembly are independently used for adjustment, the structure is simple, compared with a traditional valve of a single-stage valve plug assembly structure, the two-stage valve is better in accuracy, the adjusting density of the primary adjusting valve plug assembly is A, the adjusting density of the secondary adjusting valve plug assembly is B, the adjusting density of the valve is A * B, adjustment is more precise, and the adjusting density of the traditional valve is only A or B.

Description

technical field [0001] The invention relates to a two-stage flow regulating valve, in particular to a valve capable of performing two-stage flow regulation. Background technique [0002] In some cases where the flow control accuracy is high, since the traditional valve only has a single-stage valve plug assembly, the adjustment of the valve can only rely on the rotation of a single valve stem to drive the valve plug to adjust the valve flow. , and for the control of valve precision, it all depends on the rotation precision of the valve stem; [0003] In order to improve the accuracy, many manufacturers generally use stepping motors for driving. For some workshops with poor working conditions, the precision electronic machinery with poor environmental tolerance will be greatly affected, and it is easy to cause damage to insensitive settings. possible, while the torque output of the stepper motor is limited, and the cost is relatively high; [0004] At the same time, traditi...

AI Technical Summary

Problems solved by technology

[0002] In some cases where the flow control accuracy is high, since the traditional valve only has a single-stage valve plug assembly, the adjustment of the valve can only rely on the rotation of a single valve stem to drive the valve plug to adjust the valve flow. , and for the control of valve precision, it all depends on the rotation precision of the valve stem;

[0003] In order to improve the accuracy, many manufacturers generally use stepping motors for driving. For some workshops with poor working conditions, the precision electronic machinery with poor environmental tolerance will be greatly affected, and it is easy to cause damage to insensitive settings. possible, while the torque output of the stepper motor is limited, and the cost is relatively high;

[0004] At the same time, traditional valves are assembled with threads, and disassembly will become more difficult when encountering more impurities.

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