Reverse, over-speed and stall protection safety circuit of escalator and moving walkway

A technology for moving sidewalks and escalators, applied in escalators, elevators, transportation and packaging, etc., can solve problems such as high costs, and achieve the effects of cost economy, high control accuracy, and simple design and verification processes.

Active Publication Date: 2012-03-14
SHANGHAI MITSUBISHI ELEVATOR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the non-manipulation and reverse protection of existing escalators and moving walks are not realized through safety contacts or safety circuits, which do not meet the requirements of GB16899, and through technical analysis and investigation, there is currently no reliable solution to use safety contacts. method to achieve non-manipula...

Method used

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  • Reverse, over-speed and stall protection safety circuit of escalator and moving walkway
  • Reverse, over-speed and stall protection safety circuit of escalator and moving walkway
  • Reverse, over-speed and stall protection safety circuit of escalator and moving walkway

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Embodiment Construction

[0022] In the following embodiments, CPLD is taken as an example to illustrate the content of the present invention, so as to better understand the technical solutions of the present invention and the beneficial technical effects that can be achieved.

[0023] see figure 1 As shown, in one embodiment, the reverse, overspeed and stall protection safety circuits of the escalator and moving walk include:

[0024] An input control module 1 is used to detect the running status of the escalator and moving walk, and input the detected signal to the control processing module 2 .

[0025] A control processing module 2 is composed of programmable logic devices, such as CPLD, and judges whether there is reverse, overspeed and stall according to the operating status signals of the escalator and moving walk input by the input control module 1. When there is reverse, overspeed and / or stall, control output execution module 3 action. In the present invention, all relevant control processi...

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PUM

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Abstract

The invention discloses a reverse, over-speed and stall protection safety circuit of an escalator and a moving walkway. The reverse, over-speed and stall protection safety circuit comprises an input control module, a control processing module, and an output execution module, wherein the input control module is used for detecting the running state of the escalator and the moving walkway and inputting a detected signal to the control processing module; the control processing module consists of a programmable logic device, and is used for determining whether reverse, over-speed and stall happen according to a running state signal of the escalator and the moving walkway inputted by the input control module, and for controlling the output execution module to act when reverse, over-speed and stall happen; and a normally-open contact of the output execution module is serially connected with a safety control circuit of the escalator and the moving walkway, and the normally-open contact is switched off when reverse, over-speed and/or stall happen so as to achieve the safety protection. The safety circuit provided by the invention can achieve non-operating reverse protection, over-speed andstall protection.

Description

technical field [0001] The invention relates to the field of control of escalators and moving walks, in particular to a safety circuit for protection against reversal, overspeed and stall of the escalators and moving walks. Background technique [0002] In the early years, the electrical safety devices of escalators and moving walks were realized by relatively simple circuits, which were classified as safety circuits. Now, more complex electronic components are used in the control circuit of the electrical safety device to realize the required functional logic, and some even have to be realized by PES (Programmable Electronic System). GB16899 "Safety Specifications for Manufacture and Installation of Escalators and Moving Walks" has noticed the use of electronic components in safety circuits and given hardware regulations. [0003] At present, GB16899 has expanded its scope to the control circuit of electrical safety devices, allowing PES (including software) to be realized...

Claims

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Application Information

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IPC IPC(8): B66B29/00B66B5/02
Inventor 翁彬黄维纲
Owner SHANGHAI MITSUBISHI ELEVATOR CO LTD
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