Elevator wire rope prospects are promising

In the recent 10 years, with the sustained and rapid economic development of our country, the demand for elevators has been increasing day by day, which has injected a powerful impetus for the development of the elevator manufacturing industry. So far China has become the world’s largest elevator manufacturing country and the world’s largest elevator market, which has driven the use of elevators. Demand for steel wire ropes, industry insiders predict that the market prospect of wire ropes for domestic elevators in the future will be broad, and it will be a bright spot in the market for wire rod products.

According to the statistics of the China Elevator Association, the number of elevators in our country has reached 2 million units, and has grown at a rate of 20% per year. Over the past 10 years, benefiting from urbanization and real estate boom, sales of domestic elevators have entered an explosive growth stage since 2001. From the 37,500 units in 2000 to the 530,000 units in 2012, the average annual increase rate was as high as 24.7%. 2012 In the year when real estate is regulated, the growth rate of the elevator industry is still as high as 18%, and the overall prosperity of the industry is expected to continue to increase. In 2007-2012, the sales of elevators in China were 216,000 units and 530,000 units respectively. According to speculations, global sales of elevators during the same period were 453,000 units and 850,000 units, respectively, and the proportion of domestic elevator production and sales in the world has risen from 48% in 2007 to 62% in 2012. Within five years, the domestic share of elevators has taken up a global share. With 10% rising to more than 23%, China has become the world's largest global elevator sales volume and the largest number of elevators in the world.

With the rapid development of China's elevator manufacturing industry, the elevator market is gradually expanding, which has driven the demand for elevator wire ropes. The personage inside course of study introduces, lifts the steel wire rope is that the single rope strand wraps around the rope core spirally to make, generally uses the 50-65 number high quality carbon steel or the 60Si2Mn steel wire. The steel wire ropes for elevators mainly include wire ropes for elevator ropes, steel wire ropes for hydraulic elevators, steel wire ropes for balance (compensation) for elevators, steel wire ropes for elevator governors, etc.; the wire ropes used for elevators are 8×S(19), 8×W (w/w). 19), 8×Fi(25), 6×24, 6×S(19), 6×Fi(25) for speed regulation, 6×37, 8×Fi(25) for balance, etc. . In addition to conventional models, we have also developed a series of small-diameter steel wire ropes that are suitable for ultra-high-speed, large-capacity elevators and for the miniaturization of elevator systems.

In these years, China's elevator wire rope manufacturing industry developed with the development of the elevator manufacturing industry. As early as 2003, China's elevator wire rope production was only over 10,000 tons, mainly relying on imports. In recent years, the output of elevator wire rope in China is about 23,000 tons, and the annual import volume is about 800 tons. The number of imported steel wire ropes for high-speed and ultra-high speed elevators has gradually decreased, which shows that domestic wire ropes for elevators have made considerable progress in terms of output and quality. In particular, the development of wire ropes for high-speed and ultra-high-speed elevators has made the domestic elevator wire ropes compete in a high-quality market. The development of space.

At present, the domestic elevator wire rope production level has been greatly developed, and the annual output is estimated to exceed 20,000 tons. The major steel wire rope production enterprises, in addition to production according to the national standard, have generally adopted international advanced enterprise standards and international standards for production. Some manufacturers self-export, but also for the OTIS complete machine, has been exported to South Korea, Southeast Asia, the Middle East, Europe, Oceania, South America and other places, which shows that China's elevator wire rope production level is close to the world advanced level.

The development of the wire rope manufacturing industry places higher demands on the raw material of the steel wire rope, that is, steel wire rope steel. Elevator wire rope is an important safety component of elevators and its quality requirements are very strict. The formation of the traction force of the elevator mainly depends on the friction between the elevator rope and the traction sheave. Therefore, the steel rope and the traction sheave must be adapted to each other. In order to obtain a reliable and sufficient traction force, in addition to different designs for the configuration of the traction sheave, the number of ropes, the shape of the rope grooves, etc., there are also stringent requirements on the structure of the wire rope and the hardness of the wire. For this reason, elevator ropes have been designed with different configurations and strength configurations based on different conditions of use and operational requirements of the elevator.

The steel wire rope used for elevators is made of high-quality carbon structural steel. Commonly used steel grades are 42A, 47A, 62A, 67A, 40#, 45#, 55#, 60#, and 65; for 1960MPa, 72A or 77A are required. produce. The implementation of the standard Huai elevator according to the provisions of the standards for GB699 "quality carbon structural steel" and the implementation of the requirements of the steel for the quenching, that is, Mn content should be O.3-0.6%, Cr ≯ 0.10, Ni ≯ 0.10, Cu ≯ 0.20 regulations.

According to industry insiders, the high-end steel products of domestic steel wire ropes for elevators cannot meet the demand of the elevator manufacturing industry in terms of quantity and quality, resulting in the import of high-speed and ultra-high-speed elevator wire ropes. Based on the number of elevators in use in China and the number of new elevators each year, it is estimated that an annual total of 25,000 tons of wire ropes will be used to repair elevators and new products will be used to lift 27,000 tons of elevator ropes. The level of elevator steel wire rope in the general level is slightly higher than that in the steel wire rope system. The elevator wire rope market at the general level exceeds demand, but the production capacity of high-speed and ultra-high speed elevator wire ropes is insufficient. The actual output is only 1,000-1,500 tons and still needs to be imported from abroad.

In the future, China's elevator manufacturing industry will continue to grow and the elevator market will be huge. If the demand for affordable elevators is not considered, then the average demand for residential elevators in the lower reaches of the straight ladder will account for about 62%. Others include office buildings, airports, and rail transit. Hotels, shopping malls and other public buildings, combined with the current vertical ladder and escalator ratio of about 9:1 structure, so the commercial residential elevator potential market is very large, accounting for about 60% of total elevator demand. Although the real estate industry is affected by macro-control, the real estate industry is still growing at a relatively fast pace. The scale of real estate investment is on the rise. From January to August 2013, the investment reached 5,121.2 billion yuan, an increase of 19.30% over the same period of last year and a 20% year-on-year growth rate. about. The newly started commercial housing area was 93,713 square meters, an increase of 3.26% year-on-year. According to statistics, in September 2013, the average price of residential buildings in 100 cities (newly built) nationwide was 10,554 yuan per square meter, up by 1.07% from the previous month in August, and rose for the 16th consecutive month since June 2012, a rise from the previous month. Expand 0.15 percentage points.

It can be seen that the demand for elevators in residential buildings in the future is still a large market, and there is a lot of room for development. The demand for steel wire ropes for elevators will continue to grow and the market will further expand.

To this end, a large number of domestic steel companies and wire rope manufacturing companies join forces to develop special steel wire ropes for elevators and form special technical conditions to ensure the quality of elevator wire ropes and meet the development requirements of the elevator industry to replace imports.