Anti-hypsokinesis safe control device of crane arm frame

Abstract

The invention discloses an anti-hypsokinesis safe control device of a crane arm frame. The device comprises a displayer, a controller, an angle sensor, a low-pressure alarm pressure switch and a high-pressure alarm pressure switch, wherein the controller is used for calculating the anti-hypsokinesis length and comparing the anti-hypsokinesis length and an anti-hypsokinesis extreme position set value, and sending out an extreme position limited motion signal so as to stop the retraction action of an oil cylinder; the displayer is used for receiving an anti-hypsokinesis length signal sent by the controller; the anti-hypsokinesis length signal is displayed in the displayer in real time, an anti-hypsokinesis extreme pre-alarm range is set in the displayer, when the anti-hypsokinesis reaches the range, an alarm window is popped and used for hinting operators. The problem that the data display is not accurate due to signal interference is avoided, the commonality and operation convenience of the anti-hypsokinesis extreme position detection are improved, an anti-hypsokinesis extreme position pre-alarm function is increased, the precision and reliability of the whole anti-hypsokinesis safety control system are improved, and the cost of the anti-hypsokinesis safety control system is lowered.

Description

Technical field [0001] The invention relates to a safety control device, in particular to a safety control device for preventing backward tilting of a crane boom. Background technique [0002] In the crane hoisting process, it is often necessary to luff the boom and raise the boom to a certain angle. When the angle is too large due to improper operation or other factors, the amplitude limit switch of the primary protection device will work to limit the luffing When the amplitude limit switch fails or suddenly falls backward in special circumstances, the anti-backward device of the secondary protection device works, so that the boom, the luffing wire rope and its accessories are in a stable state to prevent lifting The boom continues to lean backwards, causing the center of gravity of the whole crane to deviate from the stable state, resulting in instability and tipping, protecting life and property. Therefore, how to safely control the anti-backward device so that it can play th...

AI Technical Summary

Problems solved by technology

[0004] The existing anti-backward safety control device has the following disadvantages: 1. The pressure sensor is an analog quantity, and its signal is easily interfered by other factors, resulting in inaccurate or jumping pressure values ​​and poor stability; The detection distance is limited. For different anti-backward oil cylinders, the proximity switches selected may not be the same, which increases the types of proximity switches and increases the misassembly rate on site; It is not easy to adjust when it is not suitable, and the generalization degree of different anti-reverse oil cylinders is not high, which reduces the mass production rate; 4.

[0005] When the proximity switch detects that the anti-backward tilt reaches the limit position, it will send an alarm signal to the operator to remind him not to raise the arm again, so as not to damage the anti-backward oil cylinder. It lacks an early warning mechanism when it is about to reach the limit position. Remind the operator to operate slowly; 5. The existing anti-backward safety control device needs to use two proximity switches and two pressure sensors, and the cost is high

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