With the development of economy, our country's merchant shipping capacity is far from meeting the market demand, and more new shipbuilding is needed to inject new power; and the rising tariff index also makes shipbuilding enterprises full of confidence in new shipbuilding investment.

With the development of economy, our country's merchant shipping capacity is far from meeting the market demand, and more new shipbuilding is needed to inject new power; and the rising tariff index also makes shipbuilding enterprises full of confidence in new shipbuilding investment. In the next 5 to 15 years, the position of the shipbuilding industry in China's industrial economy will be highlighted. The development of the shipbuilding industry in China can be described as the endless scenery, in full swing, playful, in the upstream of the industrial chain wire and cable industry, we should pay enough attention to this.

For the extremely complex and sophisticated electronic products, we must avoid the failure of ocean going marine cables. No one can afford to replace expensive machinery several years ahead of its useful life, even if it is a short shutdown, especially

It is when profit margins are small and competition is fierce.

Cable manufacturers have been working to challenge wider temperature ranges, more shielding capabilities and higher mechanical durability, as well as the flexural and chemical resistance required for extremely harsh environments and increasingly complex applications. However, cable failures and system downtime still occur.

cable fault

Many problems caused by cable faults, especially in extreme and harsh environments, can be avoided if marine cables are properly selected from the start. Indeed, matching the right temperature range and relying on PVC coats for protection is simple. However, the problems to be considered are far more than that. Engineers need to consider many details before finally choosing a fully matched cable, such as how the cable will work when used at extreme temperatures, determining the types of chemicals (grease, fuel, solvent, etc.), understanding the difference between flexibility and flexibility, and irradiating ultraviolet light and drying EMI / RFI Disturbing grading.

Flexibility and bending

Flexible cables require special bending shielding. When shielding is torn and lost continuity, the selection of standard foil shield will result in system failure. We should keep in mind the difference between flexural and flexural properties. It is important that marine cables can be bent and assembled. The installation of flexible cables is simpler and the fault detection of cabinets or cable grooves is simpler. One thing to note is that when cables are used to connect to cabinets, circular cables provide better sealing than typical helical cables. Therefore, we must correctly select the degree of bending through consideration of the line. In some production applications, cables will be constantly bent. Bending millions of times is much more complicated than flexibility. So, how do you choose a curved cable? First of all, consider the type of bending, uniaxial, twisted, or multi-axial? Each type requires different characteristics of the cable. For example, a single-axis control cable requires the highest performance (up to 14 million bends) and a flexible cable structure with continuous bending shielding. In a less demanding uniaxial environment, a curved structure and cable capable of withstanding at least one million bends are required. In twisted or different bending applications, such as torsion robots, complex cables that can be wound and operated by an arbitrary 350 degree/m soil robot are required.

Shielding (primary factor)

Ship cables need to shield the transmission and radiation of high and low frequency noise to provide signal protection, especially in some key applications. However, due to different environments, it is difficult to determine which kinds of shielding needed to protect signals. When special protection is required for signals (e.g. military applications, certain military specifications and applications requiring shielding of cable crosstalk and conduction EMI), a three-layer sheet metal foil braided cable is selected to ensure ground continuity and eliminate transmission gaps. If only the general EMI protection (conduction and radiation) is required, the common foil shielding is enough. The effects of chemicals on cables in chemical, grease, solvent, and fuel environments are often neglected, except in particularly significant cases, such as the effects of grease on the sheath of polymer cables. It must be considered that many materials behave differently in the same chemical environment because of their different strength and exposure.

Temperature influence

It is also important to note that temperature affects chemicals. For example, high temperatures produce steam that affects the integrity of ocean-going marine cables, but not in liquid form. In addition to considering the chemical resistance of cables, we should also pay attention to the entrance of potential fluids. Therefore, the external geometry of cables is also crucial to the integrity of the system. All engineers and system designers will choose a marine cable that meets the temperature requirements of the working environment. However, the impact of extreme temperatures on all sides is easily overlooked. For example, cables with nominal temperature ranges of - 13 C may not be affected by electrical properties at - 13 C, but low temperatures may affect their physical properties.

As the nerve and blood vessel of a ship, wire and cable are directly related to the ship's safety, reliability, advancement and combat capability. Therefore, the choice of marine cables must be based on different circumstances, accurate choice, can effectively avoid cable failure, seize the opportunity of vigorous development of China's shipping industry and fully develop.