BR-KT transparent teaching elevator (passenger elevator)
Overview
The BR KT transparent simulation teaching elevator is designed to cooperate with experimental demonstrations of elevator and industrial automation courses in universities, technical schools, vocational schools, labor employment training centers, elevator maintenance and property management departments, etc., so that more people can better understand and use elevators, cultivate more elevator professionals, and adapt to the development needs of the elevator industry. After in-depth exploration and research, our company, Carefully designed.
Elevators are made of transparent organic materials based on the most common lifting elevator structure, which is identical to the actual elevator structure and almost has all the functions of an actual elevator. In fact, it can be seen as a miniaturized real elevator. For the convenience of teaching, most of the components of the elevator are made of transparent organic materials, making the internal structure of the elevator clear at a glance; At the same time, the operation process and every action of the elevator are very clear and can be repeatedly operated by hand. Enable students to have a very intuitive and thorough understanding and mastery of the structure and action principles of elevators, achieving twice the result with half the effort. Solved various practical problems in elevator teaching, such as the lack of comprehensive understanding of its internal structure and operation process, which were caused by simple theoretical teaching methods or actual elevator visits in the past.
The electrical control system of the elevator adopts Mitsubishi programmable logic controller (PLC) to achieve logic intelligent control, and is driven by AC variable frequency speed regulation (VVVF). The composition and function of its hardware structure are exactly the same as the actual elevator. It has the characteristics of reliable performance, smooth operation, simple operation, low energy consumption, and easy teaching.
2、 The basic structure of elevators
1. Computer room section:
Including traction machine, brake, speed limiter, traction wheel, guide wheel or rewind wheel, manual disc wheel, control cabinet, power switch, elevator lighting switch, and shaft lighting switch.
2. Entrance section:
Car, car guide rail, counterweight guide rail, counterweight frame, buffer, limit switch, limit switch, control cable, carrying cable, speed limiter steel wire rope tensioning device
3. Car section:
It is composed of a car, safety gear, guide shoes, automatic door opening and closing machine, leveling device, control box, command button inside the car, floor indicator light, car lighting, maintenance box inside the car, and car door combination.
4. Landing door components:
Hall door, call button box, floor display, door mechanical lock, electrical interlocking device.
3、 The basic functions of elevators
A. Overspeed safety protection system
When an unexpected accident occurs in the elevator, the car may exceed the speed limit or slide down at high speed (such as a broken wire rope, detachment of the car roof pulley, failure of the traction machine's worm gear and worm gear, and excessive motor deceleration). At this point, the speed limiter will urgently brake, driving the safety caliper to move through the safety cable and connecting rod mechanism, so that the car can be stuck on the guide rail without falling.
B. Car, reusable spring buffer device
A buffer is a safety device at the extreme position of an elevator. When the elevator malfunctions and causes the car or counterweight to squat at the bottom or hit the top (limit switch protection fails), the car or counterweight collides with the spring buffer, which absorbs the energy of the elevator and slows down the car or counterweight safely until it comes to a stop.
C. Upper and lower limit switches:
Install this switch at the upper and lower ends of the elevator shaft, and install it within the upper and lower limit switches. The purpose is to protect the lower box from exceeding this range. If it exceeds the upper or lower limit, the motor will automatically stop and not work. The difference between the upper and lower limit switches is that this switch will not power off.
D. Hall door automatic closing device
The opening and closing of elevator floor doors are achieved through door blades installed on the car door. Each floor door is equipped with a door lock. After the landing door is closed, the mechanical locking hook of the door lock engages, and the elevator can only start running at this time.
E. Landing door interlock switch:
When the doors of all floors are closed, the elevator can be lifted or lowered. If the doors of one floor are open, the elevator cannot operate.
F. Terminal limit switch safety protection system
Terminal limit switches are installed on the top and bottom floors of the elevator shaft. When the elevator loses control due to a malfunction and the car collides with the top or squats at the bottom, the terminal limit switch will act, issue an alarm signal, and cut off the control circuit, causing the car to stop running.
IV. Main Technical Parameters
1. Input voltage: AC 380 ± 7% 50HZ
2. External dimensions: 1500mm wide × 90mm deep × 2200mm high
3. Landing form: passenger elevator (four floors, four stations, and four doors), freight elevator (four floors, four stations, and four doors).
4. Control method: Programmable Logic Controller (PLC) voltage regulation, speed regulation, and frequency regulation (VVVF) collective selection control.
5. Structural form: Four story station
6. Programmable Logic Controller (PLC):
Model: Mitsubishi FXzn-64MR
Input voltage: AC 220V 50HZ
Input and output points: 64 points outside (32 in, 32 out)
Output method: Relay output
7. Variable frequency governor:
Model: TE380 3007
Input voltage: AC 220V 60HZ
Rated current: 2.5A
Power: 1.2KW
8. Traction machine:
Speed ratio: 30:1
Module: 1.5 (worm gear reducer)
9. Drag motor:
Model: JW5622
Voltage: AC 220V 50HZ
Power: 180W
Speed: 2800r/min
5、 Practical training projects