How to choose a lift

With the development of social science and technology, lifts have spread to every corner of social life and are used more and more widely. Whether it is construction, civil engineering, or people's daily life, lifting machinery is inseparable. Many businesses have seized this business opportunity and invested in building factories. Lift machinery companies have sprouted like bamboo shoots in major industrial cities. The lift market is extremely hot, with supply exceeding demand. From the side, it can be seen that the rapid development of society has driven the development of the entire industry. And people's needs, however, as a buyer, how to choose a good lifting machinery among the numerous company products has become an important topic today.

1: When purchasing lifting machinery, you cannot blindly purchase it. You must conduct sufficient market research and on-site inspections to determine the size of the company and its credibility. This is first and necessary. Many small-scale enterprises in the market cut corners in order to seek violence, thus greatly reducing the quality of lifting products. Although they sell them very cheaply, this kind of machinery does not last long and is highly dangerous. . Therefore, as a buyer, you cannot be greedy for a small price advantage and cause greater regrets.

Two: Based on the information you have investigated, to choose a lifting machine with a better price/performance ratio, you should choose from its technical parameters, practicality and versatility. Usually there are many kinds of lifting machines, including (vehicle-mounted type, fixed type, hydraulic, scissor type, etc.) The technical parameters and uses of each are slightly different, but there are also many similar functions. Therefore, as a customer, you have to make a purposeful purchase, that is, you What to look for when buying a mechanical lift, and which one will meet your needs and be versatile.

Three: The last point is that after the equipment arrives, when unpacking and accepting it, you must check whether the random technical information is complete, whether the random accessories, tools, and accessories are consistent with the list, and whether the equipment and accessories are damaged or defective, etc. , and make records of unpacking and acceptance.

★Usage Example:

Indoor decoration often encounters a headache, that is, ordinary ladders are not enough! How to solve it?

The simple method is to tie two ladders, wrap them firmly on the top, and add a 1.2-meter rope to connect the bottom to form a simple triangular support. The ladder should be about 4.5 meters high. In this case, safety is not considered first. How was the sex? Simply being inconvenient to move around is troublesome.

Use an electric lift. The electric lift has the characteristics of small size, light weight, easy movement, stable lifting, small swing, large load capacity, large platform area, excellent stability, flexible operation and easy implementation. Its light appearance enables it to exert the highest lifting capacity in a very small space. In the event of a power outage, the product is equipped with an emergency descending device, a safety device to prevent the elevator from being overloaded, a leakage protection device and a phase loss protection device, and a safety and explosion-proof device to prevent the rupture of the hydraulic pipeline.

Electric lifts are widely used in factories, hotels, buildings, shopping malls, stations, airports, stadiums, etc. It can be used for maintenance of machinery and equipment, painting and decoration, replacement of lamps and lanterns, electrical appliances, cleaning and maintenance, installation and maintenance of power lines, lighting appliances, overhead pipelines, etc., high-altitude cleaning, etc. Single person working at height. It can easily enter and exit ordinary doorways and corridors, and can enter ordinary elevators for multi-story operations. It uses two-phase power as power and has infinitely variable speed, making users' high-altitude operations safer, more convenient, and less noisy. It is easy and fast to use and is an ideal equipment for climbing operations.

★Elevators used in daily life

Elevators in skyscrapers The invention of elevators made skyscrapers possible, and passenger transportation is also the most common use of elevators. The required passenger capacity of a passenger elevator is related to the building area and purpose. The passenger capacity of ordinary passenger lifts ranges from a few hundred kilograms to more than 2,000 kilograms. Lifts used in buildings below four floors may be hydraulic. The elevator speed used in buildings with ten floors or less is generally 1.5 meters/second (300 feet/minute). The speed above ten floors can reach 2.5 meters/second (500 feet/minute), or even 6 meters/second (1200 feet/minute).

Most high-rise office buildings are equipped with passenger elevators. In order to increase the speed, efficiency and usable area of ??the building, most high-rise buildings will divide the elevators into groups. Each group is responsible for some floors, and must make different adjustments and schedules according to the usage patterns of different floors at different times.

There are also some very tall skyscrapers where passengers need to use non-stop express elevators to first go from the ground to the high-rise sky lobby (i.e. high-rise elevator lobby, Sky lobby), and then transfer to elevators between different floors to reach their destinations. A few high-rise buildings are equipped with the latest elevators. You can use the elevator pre-call system to pre-call the designated floor on the office floor or lobby.

Freight lifts are a kind of special lifting machinery for freight that must be manually controlled by the lift door. Freight lifts are generally larger than passenger lifts and have a larger load capacity, ranging from 2000 to 5000 kilograms. Most of them are towed. . Freight elevators are generally not well decorated to avoid damage during transportation. There are usually dedicated elevator controllers on duty to control the opening and closing of the elevator doors.

There is a very small cargo elevator, called a dumb waiter in English, which is specially used to transport food, cups and plates in multi-story restaurants. This type of utility lift is also used to transport books in multi-storey libraries.

In construction sites, warehouses and other places, rack and pinion lifts (commonly known as "cages" in Hong Kong) are sometimes used to transport goods and allow workers to ride on them. This kind of elevator does not have an elevator shaft and uses racks to support and move the car.

Also in supermarkets, parking lots, etc. In short, lifts are very popular in life, making it convenient for you, me and others to produce and live.

Construction style

What is it? It refers to the elevator used in building construction. It is different from the indoor passenger elevator. It is also called an external elevator and a wall-mounted elevator. It is a type of elevator that is attached to the main body of the building construction and uses a working cage (hanging cage) to move vertically along the rail mast. Larger construction machinery that moves up and down (or tilts) and is used to carry people and objects. In recent years, due to the rapid development of construction scale, there are more and more high-rise buildings, and the use of elevators on construction sites is becoming more and more widespread. I read a report about elevators. At about 7:40 am on December 27, 2008, at the construction site of Shanghai City, Shaoshan South Road, Changsha City, an elevator broke its mast and caused the operating cage to fall from the air. accident, *** caused a major and vicious accident that killed 18 people. It was reported by CCTV and various media that day, causing quite a negative impact across the country. Let’s talk about our understanding of the accident based on the reports in major media and newspapers.

1. The circumstances of the accident

The night before the accident, the installation unit carried out the work of heightening and adding joints to the lift. This model (SCD200/200V ) The distance between the attachment points of the lift's mast is relatively large, 9m (the previous attachment distance was 6m). Therefore, after the standard joint is raised, the distance between the overhanging ends of the mast at that time will be 12m. According to the specification, it should be done in time. Install an attachment. However, the installation unit may have been too late. They left work without suspending the free end of the mast at such a high level, and did not hand over the situation. What is more inappropriate is that the extreme top limiter was installed. It didn't take much effort or time to put the switch on the board, but they left without even installing it. When work started on the second day, the elevator driver drove the cage through the last attachment point (28th floor) without checking the hanging situation. After two trips, the elevator driver failed on the third trip. [1] 23 people were loaded (this was overloaded), and 5 people got down on the way. When we drove to the 28th floor, due to the eccentric load of the cage on the mast, the suspended mast end was at the top attachment point. Suddenly, the cage fell from a high altitude, killing most of the people in the cage, causing a major and vicious accident that shocked the whole country.

2. The problems and responsibilities that caused the accident

Any accident that occurs involves work responsibility. The cause of the accident should be:

Firstly, Construction companies neglect management. In addition to the fact that the company blindly pursued market size in this project, lowered the level of management and technical force deployment, and even resorted to affiliation, transfer of qualifications, private recruitment, and contract management, which led to the hollowing out of management, the accident occurred. For example, if the project management department (including supervision) has coordinated the work of the installation and lift operators in cross-operation situations, even as long as there is a construction manager on duty when work starts (7:30), the lift driver The explanation said: "The top of the elevator mast was heightened and jointed last night, but it was not attached. You can't drive up (that is, you can't drive to the 28th floor)." If someone said this, what should I do to the elevator driver? Prompts and restrictions were made and the accident would not occur.

Therefore, construction management should bear the main responsibility for the accident.

Secondly, the staff’s sense of responsibility for their work is seriously insufficient, and it is not even clear whether they have received professional training or education. First of all, as an installer, after raising the mast, you should make the attachment frame in time. Failure to do so means that you are not working according to the requirements of the work specifications, especially when you know that the lift has to work, even if the workload is not large, the installation limit They were too lazy to do the work on the switch baffle and did not hand over the work afterwards. They were extremely irresponsible and had no sense of safety. They should be the main cause of the accident.

In addition, lift operators should receive professional training and be certified. You should have corresponding safety production knowledge, and inspect the mast after adding sections and raising it according to work specifications. If you can raise some questions while raising your awareness of self-protection, it is very likely to avoid the occurrence of this major casualty accident.

Third, the project supervision is not in place and is in name only. In the construction of modern construction projects, supervision not only manages the quality of the project, but also manages the safe construction. Any hidden dangers in production safety in the project should be investigated, those that should be stopped should be stopped, those that should be rectified should be rectified, and those that should be supervised should be rectified. Many production hazards were eliminated in a timely manner due to reports from the competent authorities. The engineering supervision of the project obviously failed to do so and was derelict in its duties.

3. Lessons, reflections and corrective measures from the accident

The accident was tragic and the lessons learned are profound. After reflection, the following two aspects should be rectified:

⒈Management method: Construction construction has been listed as a high-risk operation field by the state. Therefore, the control of construction safety cannot only be expressed in the form of slogans, but a project leadership team with all-round functions should be established. , all possible safety hazards are under implementation monitoring. Government authorities should resolutely investigate and deal with the phenomena of selling brands and engaging in affiliations in the construction market. For some projects, the simple and extensive management model of contract management and large contract work by project managers should be fundamentally rectified. For those who do not have the qualifications, , we should resolutely eliminate them from the construction market, otherwise construction safety accidents will still happen.

⒉ Strengthen the training and education of special operations personnel. Modern buildings are increasingly developing towards high-rise buildings, and the special equipment such as lifting or transportation used are becoming more and more advanced. The main equipment of this type includes :Tower cranes, construction hoists, hoists, winches, etc. Among them, tower cranes and construction lifts, in particular, have large weights, large volumes, and a certain degree of technical content. They are also more dangerous. They pose a potential threat to the safety of the site and surrounding areas, and require special measures. Methods and equipment are often installed, erected and dismantled on construction sites. If used improperly, managed or operated incorrectly, major accidents will often occur, causing huge losses to people's lives and property.

As for the huge accident that happened in Changsha, 90% of it should be caused by human factors. If there are people with professional knowledge to do this thing with a strengthened sense of responsibility, it can be completely eliminated. To prevent, in a word, this accident should not have happened.

Construction lift is a larger type of special construction machinery. Because it carries people, it poses a great hidden danger to people's life safety. It has been widely used in the construction of modern high-rise buildings. equipment, in recent years, safety accidents involving casualties due to falls from lifts have occurred from time to time in China. How to rectify and prevent them has become an important issue at present. All functional management departments and people in the industry must Take it seriously.