Hedlund Nathan,Torgerson Kevin L.,Stuessel Matthew J.
申请号：
NZ60522610
公开号：
NZ605226A
申请日:
2010.09.03
申请国别(地区):
NZ
年份:
2014
代理人:
摘要：
605226 A dosing valve is disclosed for use in delivering dip to a teat cup of a milking apparatus. The dosing valve (84) is filled with dip after each completed dipping operation in preparation for the next dipping operation. Each dose provides substantially the same amount of dip at each stall for consistent treatment of animals. The dosing valve includes housing (432), a dip inlet (434), a dip feed (436), a dip outlet (438), a chamber adjustment mechanism (440), a solenoid valve (444), and an air chase outlet (446). The volume of the dose may be adjusted by the relative position of the chamber adjustment mechanism and the housing. A spool-shaped piston (500) is disposed inside the housing chamber (450). The piston includes upper and lower seals (502) that seal a central portion (503) of the piston with the inside of the chamber. Pressurized dip is allowed into the chamber through the dip inlet by the valve. The pressurized dip forces the piston to slide toward the threaded shaft (460) where it is stopped to define a predetermined volume defined in the chamber between the piston and the dip outlet. This is a “dip ready” position. To apply dip, pressurized air is fed the hollow conduit (466) which pushes the piston toward the dip outlet to force dip out of the outlet. The dip outlet 438 preferably extends into the chamber, as illustrated, to act as stop for the spool-shaped piston. When the spool reaches the bottom of the chamber, the dosing valve is in a “the dip empty” position. With the spool piston in this position, the air chase outlet is no longer blocked, and pressurized air that moved the spool now exits the chamber through the chase outlet. After an appropriate air chase interval, the solenoid valve operates to allow dip to flow through the dip feed inlet to fill the chamber and push the piston to a “dip ready” position again.
