Novel pressure-regulating valve director

Abstract

The present invention relates to a new type of regulator valve pilot, comprising: a lower housing, a locking spring, a shutter spring, a shutter spring seat, an obturator plug, a moving seat, a middle housing, a membrane, a lower double spring seat, an upper housing, Large adjustment spring, small adjustment spring, upper double spring seat, guide nut, adjustment bolt, connecting rod. Its characteristics are: the lower shell, the middle shell and the upper shell are fixed with screws, and two membranes divide it into three cavities; the lower shell is equipped with a locking spring, a shutter spring, a shutter spring seat and an obturator plug; The rod is installed on the middle housing; the upper housing is equipped with double spring seats, adjusting springs, guide nuts and adjusting bolts. The beneficial effect is: when the small regulating spring works, the pressure value is small, so that the downstream pressure rises slowly. When it is compressed with the large regulating spring at the same time, because there is already a certain pressure downstream, the pressure will continue to rise steadily until it reaches the working pressure, which can reduce the gas pressure. Impact on downstream equipment, improve pressure regulation accuracy, and ensure stable working pressure.

Description

technical field [0001] The invention relates to a novel pilot for a pressure regulating valve, in particular to a novel pilot for a pressure regulating valve with double springs. Background technique [0002] At present, the pilot structure in the market is composed of shell, connecting rod, obturator plug, locking spring, shutter spring, film, moving seat, upper spring seat, lower spring seat, adjusting spring, and adjusting bolt. When the upstream pipeline gas enters the pilot through the connecting rod and acts on the obturator plug, the locking spring compresses the obturator plug to make it act on the connecting rod to seal. Turn the adjusting bolt to make the upper spring seat press the adjustment spring and apply a compressive force to the spring, so that the force generated by the spring acts on the lower spring seat, and the force of the lower spring seat acts on the moving seat, and the moving seat is forced down and drives the obturator The plug overcomes the for...

AI Technical Summary

Problems solved by technology

When the gas pressure requirement of the downstream pipeline is too high, the working load of the pilot adjustment spring is required to be larger, and the compression distance of the spring is larger, resulting in a larger opening distance of the obturator plug, and the gas pressure entering the valve body is instantly larger, and the pressure regulation The opening of the valve port increases, so that too much gas enters the downstream through the valve, the pressure rises too fast, and the high-pressure and fast gas will impact the downstream equipment, resulting in a decrease in the pressure regulation accuracy

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