Emergency stop device and system for warehouse logistics system

Abstract

The invention discloses an emergency stop device for a warehouse logistics system. The emergency stop device comprises more than one emergency stop switch. Normally closed contacts of all emergency stop switches are connected in series successively and then the whole series unit is connected in series to a coil loop of a safety relay, so that the normally closed contacts are disconnected after theemergency stop switches are pressed down and thus the coil loop of the safety relay is cut off to interrupt the a power source of a warehouse logistics system. Contacts of all emergency stop switchesare connected to a centralized controller, so that a fault signal is sent to the centralized controller to carry out fault positioning or / and fault displaying while the power source of the warehouselogistics system are interrupted. In addition, the invention also discloses an emergency stop system for a warehouse logistics system. The emergency stop system comprises a safety relay, a centralizedcontroller and the emergency stop device. A normally open contact of the safety relay is connected in series to a control circuit of the power source of the warehouse logistics system so as to control on / off of the power source. The emergency stop device and system have advantages of simple structure, high safety and reliability, low cost and the like.

Description

technical field [0001] The invention mainly relates to the technical field of food and medicine packaging, in particular to an emergency stop device and system of a warehouse logistics system. Background technique [0002] At present, e-commerce is developing day by day, and the logistics and distribution business is also becoming larger and larger. The warehousing and logistics system has been widely used in various industries. The warehousing and logistics system integrates stackers, sorters, material conveyors, AGV, stackers and other subsystems. , these subsystems realize centralized management and decentralized control through PLC controllers. The safety control of each subsystem is mainly to control the emergency stop of the equipment through the emergency stop button of the field operation box. There are usually two ways to design the emergency stop button operation: 1. The emergency stop button signal enters the PLC controller to control the emergency stop of the equ...

AI Technical Summary

Problems solved by technology

The safety control of each subsystem is mainly to control the emergency stop of the equipment through the emergency stop button of the field operation box. There are usually two ways to design the emergency stop button operation: 1. The emergency stop button signal enters the PLC controller to control the emergency stop of the equipment. The method can not only control the emergency stop of the equipment but also display the position of the emergency stop button on the fault interface. The disadvantage is that the emergency stop operation will be invalid when the PLC controller or the network fails, and there are potential safety hazards; 2. The signal of the emergency stop button enters the safety relay Control the on-off of the power supply. This method can effectively control the emergency stop. The disadvantage is that when the emergency stop button is pressed, the PLC controller cannot monitor the state of the emergency stop button, and the operator in the central control room cannot quickly judge the emergency stop operation position.

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