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Comprehensive protector for crane

A comprehensive protector and crane technology, which is applied in the direction of load hanging components, transportation and packaging, safety devices, etc., can solve the problems of high failure rate, large space occupation, and single function, so as to achieve high environmental adaptability and ensure long-term stability The effect of excellent operation and high system stability

Inactive Publication Date: 2012-10-17
抚顺市特种设备监督检验所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide a comprehensive protector for cranes to overcome the shortcomings of the existing protection devices such as single function, large space occupation and high failure rate

Method used

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  • Comprehensive protector for crane
  • Comprehensive protector for crane
  • Comprehensive protector for crane

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Experimental program
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Embodiment Construction

[0043] The invention is composed of a rotary encoder installed on the main shaft of the hoisting motor, a position sensor installed on the cam controller and a PLC controller. The PLC controller detects the motor speed signal and the position signal of the sensor, and outputs the control signal through data processing. signal, control the relays JZ1 and JZ2 to stop the motor. The output end of the PLC controller is also connected with a relay JZ3, the normally closed contact of the relay JZ3 is connected in the alarm bell circuit, and the action of the contact of the relay JZ3 sends out an alarm signal. The RS232 terminal of the PLC controller is connected to the RS485 terminal of the remote text display through an adapter, and the information on the PLC can be displayed through the remote text display. The position sensor that the present invention is installed on the crane cam controller is to adopt 6 microswitches to be respectively installed in the different gear positions...

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Abstract

The present invention discloses a comprehensive protector for a crane, wherein the comprehensive protector comprises a lifting motor main circuit and a control circuit. According to the comprehensive protector of the present invention, normally closed contacts PZ1 and PZ2 of relays JZ1 and JZ2 are respectively connected with a lifting control circuit and a lowering control circuit of a cam controller in series; a rotation encoder BMQ is arranged on a main shaft of a lifting motor M; a position sensor is installed on the cam controller of the crane; signals of the rotation encoder BMQ and the position sensor are input into a PLC controller; and the PLC controller controls action of the relay JZ1 or JZ2 through signal acquisition and data processing to enable the lifting motor M and a brake YA to be subjected to power-down. With the present invention, high environment adaptability and system stability can be obtained so as to ensure long term stable and excellent running; lifting distance limitation protection function, crane overspeed protection function, braking slipping distance detection function and load learning function are provided, and load upper limitation parameters are automatically set.

Description

(1) Technical field [0001] The invention belongs to a crane protection device, in particular to a comprehensive protection system for a bridge crane. (2) Background technology [0002] The existing crane safety protection device includes a limiter for rising limit position, an overspeed protection device and a limiter for lifting capacity. The rising limit position limiter generally has a hammer type rising limit position limiter and a screw type upper limit limiter. When the boom rises to the limit position, the contact moves and the circuit is disconnected, so that the lifting mechanism no longer moves upward. Start in the upward direction. This mechanical upper limit device can only function at the limit position, and cannot perceive the actual position of the spreader when the spreader is running within a limited range, and this structure may make mistakes in actual work. Therefore, the current safety technical regulations require that metallurgical cranes must be equi...

Claims

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Application Information

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IPC IPC(8): B66C13/48B66C13/22B66C15/06
Inventor 陈勇潘晓丽王兴涛朱健郭优薛家东孙祥广
Owner 抚顺市特种设备监督检验所
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