초록 ▼

The invention relates to a valve with high flow resolution within a flow range, which valve comprises a valve housing and a valve plug, whereby the valve plug comprises a cavity and a flow regulating slit which in cooperation with the valve housing forms a flow passage. On the shell surface of the v

The invention relates to a valve with high flow resolution within a flow range, which valve comprises a valve housing and a valve plug, whereby the valve plug comprises a cavity and a flow regulating slit which in cooperation with the valve housing forms a flow passage. On the shell surface of the valve plug, when the valve is in a fully open position, there is an area which, relative to the outlet of the valve housing, is situated on the other side of the axis of rotation of the valve plug, which area is free from the cavity. The intersection of the cavity with the shell surface of the valve plug is preferably situated on the one side of the axis of rotation of the valve plug so that the valve plug exhibits a continuous shell surface free from the cavity along at least 180 degrees of the circumference of the valve plug, whereby the flow regulating slit may extend over a substantial portion of the circumference of the valve plug, thereby providing good flow resolution in the flow range in which the flow enters the cavity via the flow regulating slit only.

대표청구항 ▼

What is claimed is: 1. A valve with high resolution within a flow range, the valve comprising: a valve plug having a shell surface defining a substantially cylindrical shape; a valve housing including an open region defined by an interior surface of the valve housing, the open region being shaped f

What is claimed is: 1. A valve with high resolution within a flow range, the valve comprising: a valve plug having a shell surface defining a substantially cylindrical shape; a valve housing including an open region defined by an interior surface of the valve housing, the open region being shaped for receiving the valve plug and for enabling the valve plug to rotate in the open region, the open region having a radial fluid inlet for admitting a regulated flow of fluid thereto and a radial fluid outlet for expelling a regulated flow of fluid therefrom, the radial fluid outlet being spaced at an angle from the radial fluid inlet such that an axis of the radial fluid outlet is inclined with respect to an axis of the radial fluid inlet; the valve plug being disposed in the open region of the valve housing and being shaped so as to be able to rotate in the open region around a rotation axis of the valve plug, the valve plug having a cavity defined in the plug and disposed on one side thereof such that the cavity can communicate with either or both of the inlet and the outlet of the housing dependent on the rotative position of the valve plug in the valve housing, the valve plug having a shell surface defining the valve plug, the shell surface cooperating with the interior surface of the open region to regulate fluid flow and having a first sealing area and a second sealing area, the first and second sealing areas together extending along at least 180 degrees of a circumference of the valve plug; a flow regulating slit formed in the second sealing area of the shell surface and communicating with the cavity and which in cooperation with the valve housing forms a flow passage, wherein, when the valve plug is in a fully open position, the radial fluid inlet and the radial fluid outlet are located within the cavity of the valve plug and the first sealing area of the shell surface of the valve plug is situated opposite from the radial fluid outlet with respect to the axis of rotation of the valve plug, and wherein, when the valve plug is in a fully closed position, the radial fluid inlet and the radial fluid outlet both face the first sealing area and the second sealing area of the shell surface. 2. A valve according to claim 1, wherein the cavity of the valve plug has an outlet that is constricted and partly narrowed toward a center of the outlet from the cavity, whereby the flow regulating slit is narrowed somewhat towards the center of the outlet from the cavity enabling lengthening of the flow regulating slit. 3. A valve according to claim 1, wherein a cross-sectional area of the flow regulating slit of the valve plug is greatest at an end of the flow regulating slit which is nearest to the cavity of the valve plug and decreases along a length of the flow regulating slit. 4. A valve according to claim 1, wherein the travel distance of the valve plug is at least 120 degrees by rotating the valve plug. 5. A valve according to claim 1, wherein when the valve is in a fully open position, the outlet of the cavity is angled approximately 90 degrees relative to the inlet of the cavity and transversely to the axis of rotation of the valve plug. 6. A valve according to claim 1, wherein the inlet and the outlet are so placed that when the valve is in a fully open position, the inlet of the cavity is angled approximately 90 degrees relative to the outlet of the cavity along the axis of rotation of the valve plug. 7. A valve according to claim 1, wherein the valve is operable either manually or by an automatic control. 8. A valve according to claim 1, wherein the valve plug shell surface is round and the interior surface of the cavity is round. 9. A valve according to claim 8, wherein the valve plug is shaped and sized so that the shell surface forms a seal against the interior surface. 10. A valve according to claim 1, wherein the flow regulating slit narrows as the flow regulating slit extends in a direction away from the cavity. 11. A valve according to claim 1, wherein the cavity and the flow regulating slit are situated such that a cross section of the valve plug forms a crescent shaped area lying on one side of the rotation axis, the crescent shaped area having first and second ends, the first end of the crescent shaped area corresponding with the first end of the flow regulating slit such that when the valve plug is inserted into the valve housing, the flow passage is formed between the flow regulating slit and an adjacent part of the interior surface of the open region. 12. A valve with high resolution within a flow range, the valve comprising: a valve plug having a shell surface defining a substantially cylindrical shape, and an axis; a cavity disposed in the shell surface on one side of the valve plug, the cavity having a first end and a second end, the cavity having a pair of substantially parallel sides; a flow regulating slit disposed in the shell surface of the valve plug, the flow regulating slit having a first end and an opposing second end, the first end of the flow regulating slit communicating with the first end of the cavity; and a valve housing including an open region defined by an interior surface, the interior surface having a substantially cylindrical shape for receiving the valve plug and for enabling the valve plug to rotate about the axis of the valve plug, the interior surface of the open region having a radial fluid inlet for admitting a regulated flow of fluid thereto and a radial fluid outlet for expelling a regulated flow of fluid therefrom spaced apart from the radial fluid inlet such that an axis of the radial fluid outlet is inclined with respect to an axis of the radial fluid inlet, the cavity and the flow regulating slit are situated such that a cross section of the valve plug forms a crescent shaped area substantially lying on one side of the axis of the valve plug, the crescent shaped area having first and second ends, the first end of the crescent shaped area corresponding with the first end of the flow regulating slit such that when the valve plug is inserted into the valve housing, a first channel is formed between the flow regulating slit and an adjacent part of the interior surface of the valve housing, wherein when the valve plug is in a fully open position, the radial fluid inlet and the radial fluid outlet are located within the cavity of the valve plug, and wherein, when the valve plug is in a fully closed position, the radial fluid inlet and the radial fluid outlet both face an outer surface of the crescent shaped area. 13. A valve according to claim 12, wherein the first end of the crescent shaped area is separated from the interior surface of the valve housing by the first channel, and the second end of the crescent shaped area can form a seal against the interior surface of the valve housing depending upon the rotative position of the valve plug relative to the valve housing. 14. A valve according to claim 12, wherein the first end of the cavity narrows so that the length of the flow regulating slit can be increased. 15. A valve according to claim 12, wherein the first end of the crescent shaped area is closer to the axis of the valve plug than the second end of the crescent shaped area.