Single beam suspension leg locking device to ensure safety

[BONOVO]

Lightweight, beautiful, durable anti-rust oil plastic chain bag to prevent chain rust. The horizontal distance, in m, between the rotating center line of the gantry crane and the plumb line of the fetching device. The amplitude of the non-rotating type boom crane refers to the horizontal distance between the center line of the spinner and the rear shaft of the boom or other typical axes. The double beam crane mainly includes lifting mechanism, operating mechanism, amplitude changing mechanism, rotating mechanism and metal structure.

Lifting mechanism is the basic working mechanism of the crane, mostly composed of hanging system and winch, but also through the hydraulic system lifting heavy objects. The intelligent crane is a multi-action lifting machine that lifts vertically and carries heavy objects horizontally within a certain range. [1] The work is characterized by intermittent movement, that is, the corresponding mechanism of taking material, migration, unloading and other actions in the more work cycle is alternately working, and the development and use of cranes in the market is more and more extensive.

The electric hoist is also equipped with a limit switch to make the motor stop automatically, prevent the chain from overrunning, and ensure safety. Electric hoist and reverse protection device, when the power connection is wrong, the control circuit can not work, play a protective role. Low noise, strong overload capacity, strong braking force. In order to ensure the safety and reliability of the lifting operation, the single-beam crane has a good safety device to protect the machine or remind the operator to pay attention to safety in the event of an accident, so as to play a safety protection role.

When there is an accident, the high-pressure hose or oil pipe in the single-beam telescopic cylinder circuit bursts or is cut off, the balance valve in the hydraulic circuit will act to lock the working oil from the lower chamber of the cylinder, so that the crane automatically retracts, so as to ensure the safety of the operation.

After lifting the hook of the height limiting device of the single beam crane to the specified height, it touches the limiting weight, turns on the travel switch, and the bypass indicator lights up. At the same time, the operation of lifting the hook, extending the boom, and lowering the boom will be cut off to ensure safety.

At this time, as long as the operation of the handle such as lowering the hook, withdrawing the boom or lifting the boom (that is, operating to the safe side), the limited weight will be lifted and the operation will return to normal. Each relief valve in the hydraulic system suppresses abnormal high pressure in the circuit, thereby preventing damage to the hydraulic pump and motor and preventing their overload.

When an accident occurs and the high pressure hose or tubing in the boom boom cylinder circuit bursts or is cut off, the balance valve in the hydraulic circuit will act to lock the working oil from the lower chamber of the cylinder, so that the boom will not fall, thus ensuring the safety of the operation.

When an accident occurs and the high-pressure hose or tubing leading to the vertical cylinder of the leg is broken or cut, the two-way hydraulic lock in the hydraulic system can block the pressure oil in the two chambers of the cylinder of the leg lock, so that the leg will not shrink or throw out, thus ensuring the safety of lifting operations.

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