Valve apparatus

摘要

A valve apparatus includes valve box, valve shaft, first flexible film, and second flexible film. The valve box includes inlet and outlet, and forms a space therein for housing the fluids. The valve shaft is inserted into through-hole formed in the wall of the valve box, and moves in the longitudinal direction of the through-hole to move valve body in order to block the flow of the fluids from inlet to outlet. The first flexible film includes a through-hole into which the valve shaft is inserted. The outer peripheral end of the first flexible film is fixed to the peripheral edge of the through-hole, and the peripheral edge of the through-hole of the first flexible film is fixed to the outer periphery of the valve shaft to close the gap between the through-hole and the valve shaft. The second flexible film forms a part of the wall of valve box.

主权项

1. A valve apparatus comprising:
a valve box including an inlet and an outlet, and forming a space that houses fluids; a valve shaft inserted into a through-hole formed in a wall of the valve box, and moved in a longitudinal direction of the through-hole to move a valve body that blocks a flow of the fluids from flowing into the space from the inlet and from flowing out from the outlet; a first flexible film including a through-hole into which the valve shaft is inserted, an outer peripheral end of the first flexible film being fixed to a peripheral edge of the through-hole of the valve box, and the peripheral edge of the through-hole in the first flexible film being fixed to an outer periphery of the valve shaft to close a gap between the through-hole of the valve box and the valve shaft; a second flexible film forming a part of the wall of the valve box; and a deformation mechanism that deforms, interlockingly with the movement of the valve shaft, the second flexible film in a direction opposite a direction where the first flexible film is deformed by the movement of the valve shaft, wherein the deformation mechanism includes a rod member fixed to the second flexible film, and the deformation mechanism deforms the second flexible film by moving the rod member, and wherein the deformation mechanism includes a first rack disposed in the valve shaft, a second rack disposed in the rod member, and a pinion that transmits movement of the first rack in the longitudinal direction to the second rack.