Overview of qyxjl-025
In keeping with the concept of free, flexible and easy-to-use design, over a period of 10 years, several series of barrier-free lifts have been developed, including qyxjl, qyxjz, qywzai, qywzaii, which enriches and improves the country's accessibility programmes in complex environments. Qyxjl-025 is one of the priority products of shandong initial transport machinery ltd。
A tilted wheelchair lift and landing platform, a barrier-free security device installed in the building system using electric tractors to move up and down the orbit and transport passengers. It consists of a driver system, a guide, a rope chain, a mobile platform, etc. Specialized equipment for the construction of a building system for climbing the stairs by persons who have difficulty climbing in wheelchairs or stairs. It consists mainly of a master-driven system, an auxiliary-driven system, a master-control system and a security system。
The tilted wheelchair lift platform, which provides services mainly to wheelchair users, is generally structured as shown in the figure below. Two tracks were set up to prevent the platform from falling. The tilted wheelchair lift platform consists mainly of work platforms, support racks, fences, the main subject being steel structures. The work platform is part of the work of the elevator and has surface-resistant materials. All three outwards of the platform are equipped with security panels that will stop the lift when the platform movement is blocked. When not used, the platform can fold upwards to reduce the amount of space occupied。
2. The working principles of the slashed barrier-free lift platform
The ramped and accessible wheelchair lift platform is controlled mainly by plc and the variable frequency switcher. Plc collects information and processes it then issues instructions, and the fm controls the motor's operating machine speed in accordance with the plc directive。
PlcRationale
Programmable controller, called programmable logiccontroller, known as plc. Plc is a computer-based electronic controller and applies to industrial field work. It originates from a relay control device, but it is not controlled through the physical process of the circuit, as is the case with a relay device, but is controlled mainly by the operation of a program stored in the plc memory for the conversion of incoming and outgoing information。
Plc uses the "scanning in sequence, revolving" mode of work
1. Each scanning process concentrates on collecting input signals and on updating the output signals。
2. Enter a refreshing process whereby, when the input port is closed, the application has a new state at the input end that cannot be read into. Only when the program is next scanned will the new state be read in。
A scanning cycle is divided into input sampling, program execution, output refreshing。
4. The content of the widget image register changes as the procedure is carried out。
The length of the scanning cycle is determined by three rules。
(1) speed of cpu implementation
(2) time of possession of the directive itself
(3) the plc scans are now very fast。
The principles of the variable frequency modem
The main circuit is the electrical transformation component that provides a voltage-adjusted fm power source for the different motors, and the main circuit for the transformers can be broadly divided into two categories: the voltage type is the conversion of the current flow of the power source into a convulsive variant, and the filter for the flow-back path is the electrical capacity. The current type is the conversion of the current from the current source to the interactive transient, and the direct flow-back filter is the electrical sense. It consists of three components, which convert the industrial frequency power source to a "resolver" of direct current power, a "square wave loop" absorbing electrical pulses generated by transformers and reversers, and a "reverse" of direct current power to communicate power。
