Elevator installation and construction procedures

Why should elevator equipment be installed in 3 stages? This is mainly considering that when installing the elevator, the equipment itself cannot be damaged during the construction process.

The correct elevator installation and construction procedures are obtained through continuous summary and modification in actual work for a long time. It has been verified for more than a century and is scientific, reasonable, safe and reliable. The construction process of the standard elevator installation must comply with the national elevator installation and construction standards.

The author found that individual installation units in society disregard the overall situation and only care about their own interests. Before the foundation construction of the elevator shaft has not started, the user’s newly installed elevator car is used as the working platform for the installation and construction to carry out all the foundations in the elevator shaft. The construction of the project. It is an illegal construction behavior to use the user's original passenger elevator equipment as an elevator construction tool. The original products produced by the manufacturer are not allowed to suffer any damage during transportation and installation. When installing the elevator, the elevator products must be ensured to be safe and intact. This is a code and moral standard that every installation unit must comply with. This kind of construction is not only irresponsible to users and manufacturers, but also reverses the elevator installation and construction process, and there are many hazards.

In the first stage of the foundation installation project in the elevator shaft, there are a large number of guide rail fixing brackets, which need to be drilled and perforated around the walls of the entire shaft. The door sills and door frames of the hall need to be punched and fixed, which will produce a large amount of residual rocks and mud. Sand, these residual rocks and silt will fall into various parts of the elevator car and the elevator traction rope groove. The sediment accumulated in the traction rope groove will not be able to be cleaned up. At this time, the sediment will reduce the friction coefficient of the friction surface between the traction rope and the traction sheave, which may cause the traction rope to slip on the traction sheave, causing The abnormal wear of the traction wire rope and the traction wheel may cause a major safety accident by falling during normal use.

A large amount of impacted gravel and sand are stuck in the oiled guide rail and the 4 guide shoes of the car. During the continuous running up and down, the original guide rail and guide shoes will be severely worn, and the surface of the guide rail will be seriously damaged. Layer and 4 guide shoes. The guide shoe can still be replaced, but the guide rail cannot be replaced.

A large number of brackets for fixing rails need to be welded and fixed at the installation site. Welded rail brackets will produce splashing sparks. Falling on the traction wire rope will burn the traction wire rope, which may cause multiple strands of wire to break, resulting in significant safety during normal use. Hidden dangers.

The safety speed limiter and safety gear in the elevator are the components of the key safety protection equipment, which are responsible for protecting the life and property of the people on the entire elevator. Once a problem occurs, it will cause a serious matter of life. The position of the speed limiter and safety gear of the elevator is welded by the main guide rail bracket, and the distance to the hole is the closest. Sparks and molten iron generated during welding can easily burn the speed limiter wire rope, and it is not easy to be found during construction. , But when the elevator is running normally, the wire rope on the burned speed limiter will have multiple strands of broken wire, which may cause the rope to break or malfunction when the brake is instantaneously. The tooth surface of the safety gear is only about 2mm away from the side of the guide rail. The impacted mud and sand continue to fall to fill the gap, and the teeth in the safety gear cannot be clenched on the guide rail. Once the elevator falls, the safety gear It will inevitably fail and will cause a major safety accident.

Due to the reversal of the installation and construction process, in the first stage, the elevator car was first assembled on the bottom of the hoistway, and the counterweight was suspended on the top floor. The original car was used as the construction work platform until the construction reached the top.

When running downwards along the installed main guide rails, clean up the large and thick pre-embedded steel heads and residual rocks and other debris from top to bottom around the hoistway wall. The cleaning method is to use acetylene oxygen wind cutting or electric welding to burn it from the top layer, and the burned molten iron and steel bars are continuously splashed and scattered from a height of up to 100 meters. These steel bars and molten iron falling from a height, no matter where they fall, will cause serious damage to the equipment already installed in the shaft. When the car is at a high place, the counterweight device must be below, from the machine room, the car, from the car to the counterweight device, from the counterweight to the machine room, the erected working wire ropes are 7 in each row, a total of 4 rows, More than 20 wire meshes, like a one-hundred-meter-long wire mesh, are hung on the back and left and right sides of the hoistway. This kind of construction that violates the construction process cannot guarantee that the working wire rope will not be injured.

Reversing the installation and construction procedures has tampered with the correct, scientific and reasonable construction technology. This kind of violation of the overall situation and harming others and self-interest will seriously damage the lives and property of the people and should be stopped.