bidirectional Hydraulic Control Check Valve hydraulic lock 

Hydraulic lock is essentially composed of two hydraulic controlled one-way valves. Hydraulic lock, as the name suggests, is a "lock" that locks the circuit to prevent the flow of oil in the circuit, ensuring that the cylinder can remain stationary even under certain external loads. The specific structure of a hydraulic control one-way valve is a one-way valve with a hydraulic control port. There are valve seats, steel balls, springs, hydraulic control ports, control plungers, and three oil ports A, B, and X. In the A-B direction, hydraulic oil overcomes the spring force, pushes open the steel ball, and flows directly through it. In the B-A direction, the steel ball falls on the valve seat and the oil cannot flow through. It is necessary to connect control oil with pressure at port X. The control oil acts on the control plunger, pushing it forward. The plunger is connected to the push rod, and the push rod pushes the steel ball open. This way, hydraulic oil can flow in a "reverse"…