If there are any imperfections in the design, construction, and acceptance of the elevator in the operation of the project, if the drawings can be reviewed and changed before the construction, if the project is not found or corrected after the completion and acceptance of the project, the project will be left with potential accidents. I would like to inform my colleagues of several problems that often occur in the work, if what I have written does not conform to the norms, I will standardize
Prevail.
1. In the preliminary design of the project, the owner should first determine the elevator specifications, manufacturers, models, and intelligent requirements. The main design determines the shaft size based on the elevator model, and reserves the control buttons, display and other reserved ports to prevent the elevator model from being changed. Workers bring repetitive construction.
2. The design of the elevator shaft bottom should reserve a drainage well, the drainage volume should not be less than 2 m, and the drainage pump drainage volume should not be less than 10L/s. Or the drainage pipe diameter should be 100-150mm. Drain well.
3. Elevator hoistway rail and equipotential connection. There are three ways:
1: Use the main steel bar of the elevator shaft shear wall larger than f6mm, and reserve an equipotential connection point for each 3-5 layer of the steel bar for welding with the elevator track rail.
2: At the bottom exhibition, the top layer leads to two points from the lightning down conductor, and equipotential and rail welding are reserved for the lightning down conductor every 20 meters in the middle.
3: On the bottom layer, the top layer leads from the lightning protection down conductor with two reserved equipotential directly set hot diffused zinc flat iron 25*4mm welded with the rail.
The grounding should be that the cross-section of the auxiliary equipotential steel bar is greater than 6 mm2, and the open lightning down conductor should be greater than 48 mm2, according to the design specification.
4. The hoistway lighting elevator specification is provided with only lights at a distance of 7 m, and the civil design specification has added a socket circuit, and the second circuit close-loop switch can be added with a leakage switch.
When installing elevators on site, the power supply on the car is generally 220 v, which can be used for lighting and sockets for easy construction.
The shaft lighting design location should not be located at the back of the car. It should not be located on the right side of the car due to the counterweight. This space is the car control cable running channel, and the location should be located on the left rail of the car. Both sides are available.
5. The car should be equipped with an alarm button, a fire phone, and an emergency light, with a power outage delay of 90 min-120 min.
6 When the building level is -, level two, the elevator dual power supply box should be located at the last level of the load, and should be located in the fire elevator machine room. The main switch of the elevator machine room should be separated from the elevator main machine, car lighting, machine room lighting, shaft lighting, dimensional miserable socket, and drain machine power supply.
7. Fire-fighting elevator machine room and passenger elevator machine room should be separated by a firewall.
8. The floor slab structure of the non-bottom elevator shaft should have sufficient strength to carry the elevator impulse.
9. Super high-rise high-speed elevators should reserve elevator buffer space.
10. The front room of the elevator must be decorated twice in the ""Code for Acceptance of Elevator Engineering Construction Quality"". The reservation in front of the passenger elevator door should not be greater than 6 mm, and the cargo elevator should not be greater than 8 mm.
