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The safety device of concrete pump truck is introduced

  (1) lifting weight indicator (angle plate, also known as weight limiter)

  The angle indicator at the base of the arm bar near the driving position, which changes with the elevation of the arm bar, looks at the angle of the arm bar to the ground, and knows the elevation angle of the arm bar at different positions, according to the performance table and the performance curve of the crane, it can be known in a certain elevation when the amplitude value, lifting weight, lifting height and other reference values.

  (2) over-lift limiter (also known as ultra-high limit device)

  A safety device installed on a pulley block at the end of an arm bar to limit the lifting height of the hook head in order to prevent the occurrence of a hoisting accident. The utility model ensures that when the hook is lifted to the limit position, an alarm signal can be automatically issued or the power source can be cut off to stop the lifting so as to prevent overwinding.

  (3) torque limiter

  The torque limiter is a safety device that automatically cuts off the lifting or luffing power source when the load torque reaches the rated lifting torque and sends out the forbidden alarm signal.

  (4) anti-arm bar rearward device and anti-back bar bracket

  The anti-arm bar backrest device and the anti-back bar bracket are safety devices that will not be lifted when the arm bar rises to the maximum rated elevation angle.

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