Flow rate adjusting device

摘要

The flow rate adjusting device includes: a valve body disposed so as to open and close the fluid passage; a dial operation part which adjusts minute opening of the valve body in the slow-leaking mechanism; a lock nut part which fixes the adjusting position of the minute opening; and a lock cap which prevents motion of the dial operation part and the lock nut part. The lock cap includes: a first insertion hole into which the substantially cylindrical dial operation part is inserted; a second insertion hole into which a rod protruding upward from the housing is inserted; and an arm part which connects the first insertion hole and the second insertion hole.

主权项

1. A flow rate adjusting device, comprising:
a housing having an inlet port at one end of a fluid passage and an outlet port at the other end of the fluid passage, the fluid passage being formed inside the housing; a valve configured to move toward an opening face of a valve seat, the opening face communicating with the fluid passage; a spring configured to generate a biasing force which presses the valve against the valve seat; a pressure chamber configured to generate a pressure force which presses the valve in a direction that the valve moves away from the valve seat, the pressure chamber configured to be pressurized by a fluid supplied from a pressure supply source; and a slow-leaking maintainer configured to maintain a minute opening between the valve and the valve seat at any moment when the biasing force generated by the spring overcomes the pressure force generated by the pressure chamber; the slow-leaking maintainer includes:
a stroke adjuster configured to adjust minute opening of the valve in the slow-leaking maintainer;a stopper configured to fix an adjusting position of the minute opening; anda lock configured to prevent motion of the stroke adjuster and the stopper, wherein the lock includes:
a first insertion hole into which a substantially cylindrical adjusting operation part of the stroke adjuster is inserted;a second insertion hole into which a rod protruding upward from the housing is inserted, rotation of the lock being prevented by the insertion of the rod into the second insertion hole; andan arm which connects the first and second insertion holes.