Patent ID: 6725880
Filing Date: 2004-04-27
Classification: G05D,Y10T

Abstract:
A regulating valve for a constant flow of a fluid comprising:a body with a upper cover and a lower cover, having an upper chamber, a middle chamber, a lower chamber, an inlet chamber between the middle chamber and the lower chamber, and an outlet chamber faced to the middle chamber; a valve stem extended upwards from the upper chamber through the center of the upper cover; an actuator mounted to the valve stem; a first clack comprising a connecting sleeve positioned in the upper chamber and a sleeve positioned in the middle chamber connected to the connecting sleeve, wherein the upper end of the connecting sleeve is connected to the valve stem, the lower end of the sleeve is an opening of an oblique plane and the upper end of the sleeve includes a square hole; a pressure difference transducer positioned within the connecting sleeve, whose upper end is connected to the valve stem; a second clack positioned within the middle chamber, the inlet chamber and the lower chamber, wherein a square projections extended upwards from the upper end of the second clack through the square hole is connected to the lower end of the pressure difference transducer, two circular projections formed at the outside of the second clack are matched with two concentric valve seats within the inlet chamber, and 3-6 through holes are formed at the upper portion of the second clack, a first channel formed between the outlet chamber and the upper chamber; a second channel formed between the inside of the pressure difference transducer and the upper chamber; wherein when the first clack is driven by the actuator to rotate, the opening of a throttling bore faced to the outlet chamber may vary to regulate the flow of the fluid.