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A rigid structure system with tightly connected supporting cables is formed by trough, tray or stepped straight sections, bends, tees, four-way components, support arms (arm brackets), hangers, etc., which are called cable trays (bridges for short) )
I believe everyone is no stranger to cable trays, but most people should not know that the development speed of the cable tray industry in our country is almost equivalent to that of today's hot computer industry. It has been developed for more than 40 years.
The cable tray industry emerged in the 1950s, when European and American developed countries had generally adopted cable trays in some large projects.
The origin of the history of cable trays in my country is during the reform and opening-up period, when technology, equipment and talents were imported from abroad, and then slowly developed to the present situation.
Beginning in the 1950s, a new type of electrical wiring device appeared abroad-a cable tray (or cable tray) for laying cables.
As soon as it appeared, it was quickly promoted and applied. In some European and American countries with developed industries, such as the United States, West Germany, Japan, Austria, France, Italy, etc., laying cables with cable trays has become a conventional wiring method.
Germany is one of the first countries in the world to design and produce cable trays. Rico and OBO Bettman in Germany are relatively well-known cable tray companies. In Japan, cable trays have been used in a small amount since 1957, and they have been popularized since 1967. In some major projects in the 1970s, cable trays were commonly used.
In my country in the 1950s, cables were laid directly in the air and pipelines underground.
Since the reform and opening up in the 1970s, cable trays and their manufacturing technologies have been introduced into my country along with the introduction of process equipment or complete sets of projects, and have been applied in metallurgy, electric power, petrochemical, textile, building materials and other industries. Later, more advanced cable tray laying devices Began to be adopted by major factories.
The appearance of cable trays has changed the traditional form of electrical wiring Anti twist wire rope.
Practice at home and abroad has proved that the cable tray is especially suitable for laying all kinds of power cables and control cables with a large number, various types, and high use requirements. It also creates conditions for the use of computers for cable design.
The cable tray is produced with modern large-scale production to meet the requirements of highly centralized control electrical wiring. This can be clearly seen by reviewing the evolution of electrical wiring.
Throughout the history of cable trays, cable trays have developed rapidly in my country. In just 40 years, the overall cable tray industry in my country has stabilized, but at the same time cable trays are also facing fierce competition and serious challenges of homogeneity.
Faced with this situation, bridge manufacturers should pay more attention to product stability and innovation, and develop lower cost, more in line with China's national conditions, and higher quality bridge products.
