The hydraulic lock is essentially composed of two hydraulic control one-way valves.Hydraulic lock as the name, is a "lock", is to lock the loop, so that the loop of the oil does not have a flow, in the diagram, to ensure that the diagram of the cylinder even if there is a certain amount of external load can make its position static.

The concrete structure of hydraulic control one-way valve is a one-way valve with hydraulic control port.There are valve seat, steel ball, spring, liquid control port, control column, A, B, X 3 oil port.A - B direction, the hydraulic oil to overcome the spring force, pushed open the steel ball, direct flow, B - A direction, steel ball falls on the seat, oil flow, not need to use X mouth connected with pressure control oil, beilun capsule accumulator supplies applied to control the function of the oil column, push the plunger, plunger push rod, push rod to open the ball, so that the hydraulic oil can flow "against".

Hydraulic lock the role of the hydraulic lock is mutual locking, and the figure in the middle position of the slide valve, the hydraulic cylinder in the action of two one-way valve left and right cylinder in a static state;However, when the slide valve is in the right position and enters port b, oil is added to the one-way valve on the right side and the valve on the left side is controlled to open the oil.The eosin accumulator is supplied with the same function as the slide valve in the left position.