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US 10,330,214 B2Granted
Control valve
AssigneeFujikoki Corporation
InventorBunta Narukawa
Life of this patent
Estimating the term…
Abstract
[Object] Provided is a control valve capable of ensuring controllability in both flows without increasing the number of parts. [Solving Means] A plurality of differential pressure valves 50, 60, 70, and 80 are disposed inside a valve body 10 so that a fluid pressure acting on a main valve body 20 disposed inside a main valve chamber 13 becomes the same in a flow of both directions including one direction from a first inlet/outlet 11 to a second inlet/outlet 12 through the main valve chamber 13 and the other direction from the second inlet/outlet 12 to the first inlet/outlet 11 through the main valve chamber 13.
Claims6
A control valve comprising:
- a valve body which is provided with a main valve chamber and first and second inlet/outlets and in which a bottom portion opening and first and second side portion openings are opened to the main valve chamber;
- a main valve body which is disposed in the main valve chamber to be elevatable relative to the bottom portion opening in order to control a flow rate of a fluid flowing in the bottom portion opening;
- and
- an elevation drive source which elevates the main valve body relative to the bottom portion opening,
- wherein differential pressure valves operated in response to a front/rear differential pressure are respectively disposed between the first inlet/outlet and the first side portion opening, between the second inlet/outlet and the second side portion opening, between the first inlet/outlet and the bottom portion opening, and between the second inlet/outlet and the bottom portion opening inside the valve body so that a fluid pressure acting on the main valve body becomes the same in a flow in both directions including one direction from the first inlet/outlet to the second inlet/outlet through the main valve chamber and the other direction from the second inlet/outlet to the first inlet/outlet through the main valve chamber.
2 more elements
A control valve comprising:
- a valve body which is provided with a main valve chamber and first and second inlet/outlets and in which an outlet is opened to a bottom portion of the main valve chamber and first and second inlets are opened to a side portion of the main valve chamber;
- a main valve body which is disposed in the main valve chamber to be elevatable relative to the outlet in order to control a flow rate of a fluid flowing in the outlet;
- and
- an elevation drive source which elevates the main valve body relative to the outlet,
- wherein a first side portion differential pressure valve allowing a fluid to flow only in a direction from the first inlet/outlet to the first inlet in response to a differential pressure between the first inlet/outlet and the first inlet is disposed between the first inlet/outlet and the first inlet inside the valve body, a second side portion differential pressure valve allowing a fluid to flow only in a direction from the second inlet/outlet to the second inlet in response to a differential pressure between the second inlet/outlet and the second inlet is disposed between the second inlet/outlet and the second inlet inside the valve body, a first bottom portion differential pressure valve allowing a fluid to flow only in a direction from the outlet to the first inlet/outlet in response to a differential pressure between the outlet and the first inlet/outlet is disposed between the outlet and the first inlet/outlet inside the valve body, and a second bottom portion differential pressure valve allowing a fluid to flow only in a direction from the outlet to the second inlet/outlet in response to a differential pressure between the outlet and the second inlet/outlet is disposed between the outlet and the second inlet/outlet inside the valve body so that a fluid pressure acting on the main valve body becomes the same in a flow in both directions including one direction from the first inlet/outlet to the second inlet/outlet through the main valve chamber and the other direction from the second inlet/outlet to the first inlet/outlet through the main valve chamber.
2 more elements
A control valve comprising:
- a valve body which is provided with a main valve chamber and first and second inlet/outlets and in which an inlet is opened to a bottom portion of the main valve chamber and first and second outlets are opened to a side portion of the main valve chamber;
- a main valve body which is disposed in the main valve chamber to be elevatable relative to the inlet in order to control a flow rate of a fluid flowing in the inlet;
- and
- an elevation drive source which elevates the main valve body relative to the inlet,
- wherein a first bottom portion differential pressure valve allowing a fluid to flow only in a direction from the first inlet/outlet to the inlet in response to a differential pressure between the first inlet/outlet and the inlet is disposed between the first inlet/outlet and the inlet inside the valve body, a second bottom portion differential pressure valve allowing a fluid to flow only in a direction from the second inlet/outlet to the inlet in response to a differential pressure between the second inlet/outlet and the inlet is disposed between the second inlet/outlet and the inlet inside the valve body, a first side portion differential pressure valve allowing a fluid to flow only in a direction from the first outlet to the first inlet/outlet in response to a differential pressure between the first outlet and the first inlet/outlet is disposed between the first outlet and the first inlet/outlet inside the valve body, and a second side portion differential pressure valve allowing a fluid to flow only in a direction from the second outlet to the second inlet/outlet in response to a differential pressure between the second outlet and the second inlet/outlet is disposed between the second outlet and the second inlet/outlet inside the valve body so that a fluid pressure acting on the main valve body becomes the same in a flow of both directions including one direction from the first inlet/outlet to the second inlet/outlet through the main valve chamber and the other direction from the second inlet/outlet to the first inlet/outlet through the main valve chamber.
2 more elements
Dependencies are inferred from the claim text.