LIQUID DISTRIBUTION DEVICE FOR CONTROLLING HYDRAULIC MECHANISMS OF QUARRY DRILLING MACHINE Russian patent published in 2009 - IPC F15B13/02 

FIELD: engineering industry.

SUBSTANCE: invention refers to hydraulic drive of quarry drilling machine meant for drilling rocky blast holes with changing physical properties. Device is provided with valve distribution units, each of which consists of a casing with supply, discharge and drain channels with safety and pilot-operated valves built in the casing, throttle plate and control pilots. Casing, safety and pilot-operated valves, throttle plate installed on pilot-operated valve, and pilots comprise three-line three-position working liquid distribution unit with protection of hydraulic line supplying working liquid to consumer from overloads and its free discharge in reverse drain direction with controlled actuation time of pilot-operated valve at switching off hydraulic drive thus eliminating hydraulic impacts. Working liquid for controlling hydraulic mechanisms is distributed with three units according to supply, discharge and drain lines connection diagrams, as well as valve control electromagnets actuation program.

EFFECT: providing power and speed movements of mechanisms by means of three-line valve distribution with direct protection of hydraulic lines from overloads and hydraulic impacts.

2 dwg