Valve device
AssigneeMikuni Corporation
InventorsNaoki Tanaka, Keigo Suzuki, Daisuke Takayama, Katsunari Tobe
Life of this patent
Estimating the term…
Abstract
A valve device of the present invention includes: a body (10) defining a passage (11) through which fluid flows; a valve shaft (20) pivotably supported by the body; a butterfly valve (30) fixed to the valve shaft to open and close the passage; and a drive unit (60) configured to impart a rotational drive force to the valve shaft. The body has a protrusion portion (17) formed integrally in a manner of protruding from an outer wall (10a) of the body, and the drive unit (60) is fixed to the body (10) via the protrusion portion (17). Accordingly, influence of heat of high-temperature fluid can be suppressed or prevented, and the opening and closing operation can be performed with high precision.
Claims9
A valve device, comprising:
- a body defining a passage having a centre on a centre line through which fluid flows;
- a valve shaft pivotably supported by the body;
- a butterfly valve fixed to the valve shaft to open and close the passage;
- and
- a drive unit configured to impart a rotational drive force to the valve shaft,
- the body has a protrusion portion formed integrally in a manner of protruding from an outer wall of the body, and
- the drive unit is fixed to the body via the protrusion portion,
- wherein the body comprises a seal portion and a full-open stopper, the seal portion is formed protruding into the passage in order that the butterfly valve abuts, in a full-close state, against the seal portion, and
- the full-open stopper is formed protruding into the passage in order that the butterfly valve abuts, in a full-open state, against the full-open stopper,
- wherein the body is a cast product cast with a lost wax method,
- wherein the full-open stopper is formed at a position deviated toward one side in a direction of the centre line from a centre of the valve shaft, and the full-open stopper is formed adjacent and connected to the seal portion.
Dependencies are inferred from the claim text.