Hoisting limiter

A limiter and processor technology, applied in the direction of transportation and packaging, load hanging components, safety devices, etc., can solve the problems of resistance temperature rise detection results, inconvenient observation of load values, errors, etc., to achieve simple and easy to understand operations, reduce Factory commissioning time and the effect of reducing manual errors

Active Publication Date: 2013-08-07
中水三立数据技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of analog adjustment, the temperature rise of the resistance will cause a certain error in the detection results
In addition, the existing lifting limiter generally adopts an integrated design, and the display of the load value is not easy to observe

Method used

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Embodiment Construction

[0028] Below in conjunction with embodiment the present invention is further elaborated.

[0029] Such as figure 1 , figure 2 As shown: the present invention provides a lifting limiter, including a host 1 and an external meter 2, and the communication between the host 1 and the external meter 2 is carried out through the RS485 bus; the host 1 includes a first processor 1-1, the first The 2nd, 3rd, 4th pins of the processor 1-1 are connected with the first communication interface 1-2, the 1st, 17th, 18th, 19th pins are connected with the serial interface 1-12, and the 15th pins are connected through the optocoupler 1-10 It is connected with the relay 1-11, and the 23rd pin is connected with the differential amplifier circuit 1-13; the input end of the differential amplifier circuit 1-13 is electrically connected with the pressure sensor 1-7; the external meter 2 includes a second processor 2-1, the 2nd, 3rd, and 12th pins of the second processor 2-1 are connected to the seco...

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PUM

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Abstract

The invention provides a hoisting limiter which comprises a mainframe and an external meter head, wherein the mainframe and the external meter head are in communication by an RS 485 bus; the mainframe comprises a first processor which is respectively connected with a first communication interface and a serial interface in an interactive way; the first processor is electrically connected with a relay by a differential amplification circuit and a pressure sensor; the external meter head comprises a second processor; the second processor is connected with a second communication interface in an interactive way; the second processor is connected with a key and a nixie tube display screen; and the two ends of the RS 485 bus are respectively connected with the first communication interface and the second communication interface. According to the hoisting limiter, the mainframe and the external meter head used for display alarm are designed in a split way, and remote communication between the mainframe and the external meter head can be realized by the RS 485 bus, so that the external meter head and the mainframe can be installed separately at a long distance, the interference of environment to the signals of the pressure sensor can be reduced, the load of a crane is accurately measured, and the crane is well protected.

Description

technical field [0001] The invention relates to the technical field of water conservancy monitoring automation, in particular to a lifting limiter. [0002] Background technique [0003] Lifting weight limiter, also known as overload protector, is a safety protection device for hoisting machinery, which can be used on bridge cranes, door cranes and other crane equipment for load measurement and overload protection of cranes during the process of lifting goods. device. Lifting weight limiter is mainly composed of two parts: a resistance strain gauge sensor and an electrical controller. It has functions such as sound and light alarm, cutting off the power supply of the hoisting circuit of the crane, and digital display of weight. [0004] The lifting limiter has the function of corresponding to various range sensors. The existing lifting limiter mostly adopts the analog method, and realizes this goal by adjusting the potentiometer. Due to the use of analog adjustment, the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C15/06
Inventor 褚铭任传胜
Owner 中水三立数据技术股份有限公司
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