What safety devices are installed on the hottest c

2022-08-02
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What safety devices are installed in the crane? To ensure the safety of lifting operation, D. each length, pneumatic unit and display digit are reliably and dynamically interchanged. After the formal implementation of the relatively perfect safety system, the crane will provide a strong quantitative support device for the fair selection and use of packaging materials, so as to protect the parts or remind the operators to pay attention in case of accidents, so as to play a role in safety protection

1. Each overflow valve in the hydraulic system: it can suppress the abnormal high pressure in the circuit to prevent damage to the hydraulic oil pump and motor, and to prevent overload

2. Boom luffing safety device: when an accident occurs and the high-pressure hose or oil pipe in the boom luffing cylinder circuit bursts or is cut off, the balance valve in the hydraulic circuit will work to lock the working oil from the lower chamber of the cylinder, so that the boom will not fall, so as to ensure the safety of operation

3. Boom telescopic safety device: when an accident occurs and the high-pressure hose or oil pipe in the boom telescopic cylinder circuit bursts or is cut off, the balance valve in the hydraulic circuit will work to lock the working oil from the lower chamber of the cylinder, so that the crane will retract itself, so as to ensure the safety of operation

4. Height limit device: after the hook is lifted to the specified height, you can see and touch the limit hammer. Turn on the travel switch, and the "over winding" indicator light will be on. At the same time, cut off the hook lifting, boom extension, boom crouching and other operations to ensure safety. At this time, as long as the handle such as lowering the hook, retracting the jib or lifting the jib (i.e. operating to the safe side) is operated to release the restraint of the limit weight, the operation will return to normal. On special occasions, if a small amount of over winding operation is still required, press the release button on the instrument box, and the limit function will be relieved. However, the operation at this time must be very careful to prevent accidents

5. Outrigger locking device: when an accident occurs and the high-pressure hose or oil pipe leading to the outrigger vertical cylinder is broken or cut, the two-way hydraulic lock in the hydraulic system can block the outrigger and block the pressure oil in the two cavities of the cylinder, so that the outrigger will not shrink or throw out, so as to ensure the safety of lifting operation

6. Lifting weight indicator: the lifting weight indicator is set at the closing side of the basic boom (i.e. the right side of the control room), which can be clearly observed by the operator sitting in the control room, and can accurately indicate the elevation angle of the boom and the allowable rated lifting weight of the crane under the corresponding working conditions

7. Lifting characteristics table: it is set on the front lower wall panel in the control room, which can not only effectively improve the operating effectiveness of the machine body, but also lists the rated lifting capacity and lifting height under various arm lengths and operating ranges for reference during operation. During lifting operation, the value specified in the table shall not be exceeded

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