LOCKING DEVICE Russian patent published in 2012 - IPC F16K1/32 F16K17/168 

FIELD: machine building.

SUBSTANCE: radial threaded hole and annular groove is made in housing of the device, and threaded sealing cup, housing of actuator with control levers, with protective sleeve and stock are installed. Stock is connected to plunger through trapezoidal slot. Rectangular slot is made on external surface of plunger, and inner spherical segment is made on the end. Annular tight chambers are located on one side in housing channel, restricted with inner diameter of channel and external surface of support sleeve. Sealed spherical segment is made on the end of support sleeve. Cross-over sleeve with tight chamber and ribs is installed on opposite side through projection in housing groove. Seats are made on ribs. The appropriate seats are arranged in housing groove and pins are installed, and end of cross-over sleeve is provided with spherical surface and projection. Sphere is located between support and cross-over sleeves. Tight chamber is made in sphere. Projection of cross-over sleeve interacts with plunger through rectangular slot, and sphere interacts with inner spherical segment of plunger at rotation of control levers so that sphere can interact with sealed spherical segment of support sleeve with possibility both of forced shutoff of inlet channel of hydraulic connection, and interaction of sphere with spherical surface of cross-over sleeve or with sealed spherical segment of support sleeve when direction of pumped medium flow changes to close or open the channels of hydraulic connection in automatic mode at operation of the locking device. For convenience of assembly and removal of the locking device the central channel of hydraulic connection is eccentric relative to housing axis.

EFFECT: improving reliability, reducing element base of the device design, enlarging service life, reducing hydroabrasive wear and improving corrosion resistance.

2 cl, 6 dwg