What are the safety devices of jib cranes?

| What are the safety devices of jib cranes?

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In order to ensure the safe operation of the jib crane, the jib crane is also designed with many safety equipment, so that the safety of the machine and the
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2022-02-28 14:43

What are the safety devices of jib cranes?

In order to ensure the safe operation of the jib crane, the jib crane is also designed with many safety equipment, so that the safety of the machine and the operator can be well maintained in the event of an accident. So what are the safety equipment of jib cranes?

  1. Boom elastic safety equipment: When an accident occurs and the high-pressure hose or oil pipe in the boom elastic cylinder circuit bursts or is blocked, the balance valve in the hydraulic circuit will work to lock the working oil from the lower cavity of the cylinder, so that the crane can lift. It will retract by itself, and then ensure the safety of the operation.

    2. Each relief valve in the hydraulic system: It can suppress abnormal high pressure in the circuit to avoid damage to the            hydraulic oil pump and motor, and avoid overloading.

    3. Height limit equipment: After the hook is raised to the specified height, touch the limit hammer, turn on the limit                    switch, and the "overwinding" indicator light will be on, which will block the lifting of the hook, the extension of the                  boom, and the extension of the boom. The safety is guaranteed by the operation of the volt-and-wait action. At this                time, when the hook is lowered, the boom is retracted, or the boom is raised (ie, operate to the safe side), the limit                  weight is released from restraint, and the operation returns to normal. In special occasions, if you still need to make a              small amount of bypass operation, you can press the release button on the instrument box, and the effect of the                      current limit will be eliminated, but the operation at this time is very careful to prevent accidents.

    4. Cantilever lifting characteristic table: set on the lower wall panel on the front side of the operating room, the table lists          the additional lifting capacity and lifting height under various boom lengths and various operating fluctuations for easy            reference during operation. When lifting operations, must not exceed the value of the rules in the table. In order to                  ensure the safety and reliability of the lifting operation, the crane is equipped with relatively complete safety equipment,          so that in the event of an accident, it can maintain the parts or remind the operator to pay attention, and then play a                safe maintenance effect.

    5. Outrigger locking device: When an accident occurs and the high-pressure hose or oil pipe leading to the straight                    cylinder of the outrigger is broken or cut, the two-way hydraulic lock in the hydraulic system can close the pressure oil in          the two chambers of the outrigger and the cylinder, so that the outrigger can be locked. Do not retract or throw out,                then ensure the safety of lifting operations.

    6. Lifting weight indicator: The lifting weight indicator is set on the side of the basic arm (that is, on the right side of the            operating room), and the operator can clearly observe it when sitting in the operating room, and can accurately                        indicate the elevation angle of the boom and the The additional lifting capacity allowed by the crane under the                        corresponding working conditions.