Ultralow-temperature-resistant crane moment limiter

Abstract

The invention provides an ultralow-temperature-resistant crane moment limiter. The moment limiter consists of a main controller, a long angle sensor, a pin shaft force sensor, a display screen and an alarm device, wherein the main controller comprises a single-chip microcomputer processor, an A / D (Analog to Digital) conversion circuit, an analog quantity input circuit, an R232 serial communication circuit, a CAN (Controller Area Network) communication interface and a switching quantity output module; the long angle sensor comprises an angle measuring module consisting of an MEMS (Micro-Electromechanical System) chip as well as a length measuring module consisting of a potentiometer and a circuit for converting resistance into an analog signal; the pin shaft force sensor has a pin-shaft-shaped double-shear-beam structure, and has the characteristics of unbalance loading resistance, torsion resistance, high accuracy and the like; the alarm device comprises an alarm circuit consisting of a relay, a buffer and a 24V direct-current power supply; the display screen comprises an R232 serial communication module. Compared with the commercially-available moment limiter, the ultralow-temperature-resistant crane moment limiter provided by the invention has the advantages of ultralow temperature resistance, compact structure of the main controller, high vibration impact resistance, high reliability and the like.

Description

technical field [0001] The invention relates to an ultra-low temperature resistant crane moment limiter, which belongs to the application field of crane heavy industry. Background technique [0002] Hoisting machinery is an indispensable and important equipment in industrial production and building construction. It is also a highly dangerous and accident-prone equipment on the construction site. Once an accident occurs, it often causes major economic losses and even casualties. The moment limiter is an important safety protection device for cranes, and it should have strong environmental adaptability and high reliability. [0003] The moment limiter collects the load of the crane, the length and angle of the boom of the crane according to the actual working state, calculates the moment load on the crane, judges whether the crane is overloaded according to the allowable moment load, and finally sends out an alarm signal and prevents the crane from moving along the dangerous p...

AI Technical Summary

Problems solved by technology

The domestically developed crane moment limiter can dynamically display data and automatically sound and light alarm and prevent the crane from moving in a dangerous direction. Whether the crane is overloaded, resulting in difficult operation and greatly reduced safety

Moreover, the current domestic torque limiters are limited by hardware and cannot withstand low temperatures, have low reliability, low impact resistance, and single functions.

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