Product Description

Zoomlion Crane Accessories Winch Balance Valve/Hydraulic Lock

Function

The function of the crane winch balance valve is mainly as follows:
1. Load holding and control: In the process of maneuvering the main winch down, it keeps a certain back pressure on the return oil circuit to balance the mass of the drill rod and bucket so that they will not fall down by themselves. At the same time, it allows the actuator to lift or lower the weight at a certain speed and keep it in a certain position, so as to meet the actual working requirements. In addition, it can also effectively control the executive element under the action of the load smooth action, to prevent uncontrolled action due to the impact of load changes.
2. Safety protection: when the hydraulic oil circuit in the pipeline burst or serious leakage, installed in the actuator on the balance valve can prevent the uncontrolled movement of the load occurs. In addition, if there is not enough hydraulic oil in the hydraulic cylinder to maintain the stability of the crane, the counterbalance valve will automatically close to prevent the crane from continuing to fall, playing a safety protection role.
3. Adjustment of pressure and flow: The counterbalance valve can adjust the pressure and flow according to the actual demand, in order to adapt to different working environments and load conditions. For example, when lifting small tonnage weight, the motor is required to have “high speed and low torque”; while when lifting large tonnage weight, the motor is required to have “low speed and high torque”.
4. Optimize system performance: Through reasonable selection and application of balance valves, the response speed, stability and reliability of the hydraulic system can be improved, and problems such as energy loss and noise pollution can be reduced, so as to prolong the service life of the equipment and reduce maintenance costs.
In summary, the crane winch counterbalance valve in the crane operation plays a vital role, it not only ensures the safety and stability of the operation, but also improves the operational efficiency and reliability of the equipment.