Which aluminum alloy plate is suitable for ship plate?

5083 aluminum plate is a high magnesium alloy with good strength. such as 5086 Aluminium plate.

Corrosion resistance and machinability among non heat treatable alloys. The surface is beautiful after anodizing. The arc welding performance is good. The main alloy element in 5083 gold is magnesium, which has good corrosion resistance, weldability and medium strength.

5083 plate

The excellent corrosion resistance enables 5083 alloy to be widely used in marine applications such as ships, automobile, aircraft weldments, subway light rail, pressure vessels (such as liquid vehicle, refrigerated vehicle, refrigerated container), refrigeration devices, TV towers, drilling equipment, transportation equipment, missile parts, and armor that need strict fire protection.

It is widely used for maritime purposes, such as ships, automobile, aircraft weldments, subway light rail, pressure vessels that need strict fire prevention (such as liquid tank cars, cold trucks, refrigerated containers), refrigeration devices, television towers, drilling equipment, transportation equipment, missile parts, armor, etc

 

Basic characteristics of aviation aluminum alloy

The main characteristics of aluminum alloys for aerospace are: large-scale and integration, thin-walled and lightweight, precision of section size and geometric tolerance, uniformity and quality of microstructure and properties. According to different service conditions and parts of aircraft, aluminum alloys for aerospace are mainly high-strength aluminum alloy, heat-resistant aluminium alloy and corrosion-resistant aluminum alloy. High strength aluminum alloy is mainly used for aircraft fuselage components, engine compartment, seats, control systems, etc., and is the most widely used,For example, 5086 aluminum alloy.

characteristics of aviation aluminum alloy

The biggest characteristic of aviation aluminum alloy is that it can improve the strength by deformation heat treatment. Deformation heat treatment is a comprehensive process that combines the deformation strengthening of plastic deformation with the phase transformation strengthening during heat treatment to unify the forming process and formability. During the plastic deformation process of aviation aluminum alloy, the defect density inside the crystal increases, and these crystal defects will cause the change of the internal microstructure of the material. In the process of plastic deformation of aviation aluminum alloy, dynamic recovery, dynamic recrystallization, sub dynamic crystallization, static recrystallization, static recovery and other crystal structure changes will occur. These changes in crystal structure, if properly controlled, will significantly improve the mechanical properties of the material and enhance the service life of the material.

Aeronautical aluminum alloys are generally strengthened by precipitation of dispersed phase in supersaturated solid solution. The general precipitation sequence is: segregation region (or GP region) ~ transition phase (metastable phase) ~ equilibrium phase. In the process of deformation heat treatment, deformation induces precipitation, precipitation affects deformation, deformation and precipitation affect each other, and dynamically affect the properties of the material.

characteristics of aviation aluminium alloy

The precipitation strengthening process of deformation heat treatment is greatly affected by temperature. Deformation heat treatment can be divided into high temperature deformation heat treatment and low temperature deformation heat treatment. The basic processes of low temperature deformation heat treatment are: quenching of aviation aluminum alloy, cold deformation at room temperature and aging heat treatment. After this treatment, the strength of aviation aluminum alloy is greatly improved, but the plasticity is reduced. High temperature deformation heat treatment process: quenching, high temperature deformation and aging. After high temperature deformation heat treatment, the strength of the material is higher, the plasticity and toughness are improved, and the heat resistance strength of the alloy is also improved.

Damaged ABC cable sheath may not be a quality problem

In the severe cold in winter, many construction workers will find such a problem when laying and installing Aerial Bundled Cable: ABC cable products with good quality usually have some hardening of the wire body and peeling off of the insulation coating. In view of these phenomena, many construction workers think that the wire and cable products themselves have quality problems, but in fact, the insulation of the cable products is damaged or peeled off, which is not necessarily the product quality problem. Next, let’s take a look at the reasons and preventive measures for the damage and fall of the cable sheath.

  1. The cable sheath is damaged or peeled off, which may be caused by the cold weather in winter. The outer skin of wire and cable products is mostly ordinary plastic (PVC) or rubber. When they are in a sub-zero environment, they will become hard, especially in the north. In winter, the outdoor temperature is often below zero, and the surface temperature may be more Low, if the wire and cable product is placed outdoors or directly on the ground, the entire wire and cable product line will become hard and brittle, causing the outer skin to fall off and be damaged under a slight external force.
  2. Can (ABC) HD 626 S1 Standard sheath be used if it is damaged?
    Try not to use it. The reason is: the sheath of the cable plays a protective role. If the cable is used directly without the protection of the sheath, it will soon cause leakage. Therefore, try not to use the cable sheath if it is damaged or falling off. If you must use the cable, you need to Take some protective measures, such as: for outdoor cables, you need to use waterproof insulating tape first, and then use heat shrinkable tubing, just fine; if it is used for high-voltage lines, you need to deal with the damaged insulation skin, generally high-voltage Wrap a certain number of turns with tape to make it fully meet the 10KV high-voltage cable insulation requirements; for severely damaged cables with partial discharge phenomena, a section of the partially damaged high-voltage cable should be discarded, and it should be done in a partially damaged place. High pressure connector.
  3. Measures to prevent damage and fall off of the cable sheath in winter:
    (1) When the cable is shipped out of the factory, warm and protective measures are required, such as: use enclosed transportation tools to prevent the product from being directly exposed; padded the product with a layer of soft cushion, such as bedding or other soft foam. (2) Cable storage: When arriving at the destination or the construction site, the product supplier should send personnel to supervise to prevent rough operations when the product is unloaded; try to store the product indoors, and at the same time lay a place on the surface of the storage. Layer isolation layer, such as wood, bedding, foam, etc., to prevent the product from freezing and damp.(3) Cable laying: you should choose to work under the condition of warmer temperature in the middle and afternoon, or do some protection for the cable, especially when laying the cable through the pipe, make sure that the inside and outside of the pipe are smooth in advance, so as not to scratch the wires. .

Well, the above is the introduction about the “causes and preventive measures of cable sheath damage and shedding”, I hope everyone can understand.

Advanced armoring methods and equipment for AAAC cables

One of the characteristics of all aluminum alloy cables  sales is the aluminum alloy tape interlocking (interlocking) armoring method. The technology of this armoring method is far superior to the steel tape wound armoring of copper cables. The use effect of the cable is also incomparable with copper cables. of. But the same is the aluminum alloy belt interlocking (chain) armoring, and there is a big gap in the armoring equipment and production technology of domestic aluminum alloy cable manufacturers.
At present, the domestic aluminum alloy armoring machine production lines are equipped with different equipment, including imported, imitated imported technology, and domestically made equipment. The current situation of domestic imported equipment is that in the equipment selection, due to the lack of aluminum alloy cable production experience and consideration of equipment investment, the most advanced one cannot be selected, or the imported second-hand equipment, or the imported host machine, in order to save investment, supporting tooling Molds were solved domestically, and the result was that the performance of imported equipment could not be reached. The product produced by this equipment has large wave peaks and poor bending performance. The armor and the armor are mutually lying structures, which cannot meet the structure required by the American technical standards. The product has poor compression resistance and is easy to peel off. As for the equipment imitating imported technology and domestically produced equipment, because the technology is not mature, the armored products produced can be imagined. Because of these various factors, the armored products produced by these equipment of domestic aluminum alloy cable manufacturers cannot meet the requirements of American technical standards.


At present, the American UMI alloy cable brand originally introduced the world’s most advanced KALMARK chain armoring machine production line from Canada. The aluminum alloy tape chain armored cable developed in accordance with American technical standards has good peak density and good bending performance. The armors are interlocking structures. The special structure interlocking between the layers can ensure that the cable withstands strong external force damage. Even if the cable is subjected to greater external pressure and external impact, the armor layer can also protect the insulation. Layer electrical performance. The structure of the aluminum alloy non-magnetic armor layer effectively improves the flame retardant level of the cable, greatly reduces the fire or fire hazard to the cable, and greatly reduces the cable eddy current loss. It truly embodies the quality and style of authentic American alloy cables.
Therefore, the fifth fact that users and related industry personnel must clearly understand is:
It is necessary to understand the technical level and production process of the armoring equipment of the aluminum alloy cable manufacturer, and whether the products produced are dense in wave crests and good in bending performance. The armor and the armor are mutually linked structures.

Installation tutorial of BVV cable

The full name of BVV wire is copper core PVC insulated PVC sheathed round sheathed wire, also known as lightweight PVC sheathed cable, commonly known as hard sheathed wire. Copper core (hard) wiring, single core round, double core flat. It is usually used for surface-mounted wires.
The letter B stands for cloth silk, and the letter V stands for polyvinyl chloride in plastics. There are also the copper core symbol, and the hard wire (ordinary single-core conductor) symbol is omitted and will not be displayed.
Structural specifications: The difference between BVV wire and BV wire is that BVV has an extra layer of sheath than BV. It is suitable for cables and wires used in power plants, household appliances, meters, and telecommunication equipment with AC voltage of 300/500V and below. The long-term allowable working temperature of the iron core does not exceed 65 degrees. Its nominal cross section is 0.75-185mm2.
Purpose: BVV wire hard sheathed wire is suitable for cables and wires of power plants, household appliances, instruments and telecommunication equipment with AC voltage of 300/500V and below, and also used for surface-mounted wires.


The difference between BVV wire and BV wire is that BVV wire has an extra layer of sheath than BV wire. It is suitable for cables and wires used in power plants, household appliances, meters, and telecommunication equipment with AC voltage of 450/750V and below. The long-term allowable working temperature of the iron core does not exceed 65 degrees. Its nominal cross-section is divided into 0.75; 1.0; 1.5; 2.5; 4; 6; 10; seven specifications ranging from 0.75-10 square.
It is suitable for wires and cables used in power plants, household appliances, meters and telecommunication equipment with an AC voltage of 450/750V and below.
Installation method of BVV wire:
1. When installing cable terminals, the semiconductor electrical shielding layer must be stripped off, and the insulation must not be damaged during operation. Knife marks should be avoided. If necessary, sand it smoothly with sandpaper; the shielding end should be smooth, and the graphite layer should be smooth (carbon particles) removed.


2. The copper tape shield and steel armor at the end of the plastic insulated cable must be well grounded. This principle should also be followed when short-circuiting, so as to avoid induced electromotive force at the end of the steel armor during the three-phase unbalanced operation, and even “fire”, burnt-out of the sheath and other accidents. The ground lead needs to use our tinned braided copper wire. When connecting with the copper tape of the cable, ferrochrome should be welded. It is not recommended to use a blowtorch to seal and solder, so as not to burn the insulation layer.
3. The three-phase copper tape shield should be connected to the ground wire separately. Note that the shielded ground wire and the steel armored ground wire should be led out separately and insulated from each other. The position of the welding ground wire should be as low as possible.
The basic requirements of the cable end and the middle joint: a. Good conductor connection b. Reliable insulation, it is recommended to use radiation cross-linked heat-shrinkable silicone rubber insulation material. c. Good sealing performance d. Sufficient mechanical strength to adapt to various operating conditions.
The end of the cable must be protected from water and other corrosive substances to prevent the insulation layer from aging and breakdown due to water trees. A crane or forklift must be used for cable loading and unloading. Horizontal transportation and flat laying are prohibited. When installing large cables, the cable car must be used to prevent the cables from being damaged by external forces or being scratched by manual dragging.
If the cable cannot be laid in time for some reason, it should be stored in a dry place to prevent the end of the cable from being exposed to sunlight and water.

How much do you know about JHS cables

JHS is a waterproof cable with professional waterproof function. Professionally called copper core waterproof rubber flexible cable, we usually call it special waterproof rubber flexible cable for submersible pumps. It is mainly used for underwater electric power transmission. For example, we often use control cable for submersible pumps, underground coal mining wires and underwater lights, etc., which have good electrical insulation and good waterproofness.


The structure of JHS cable: Conductor: It is composed of multiple soft bare conductor or galvanized copper wires twisted together. Insulation: special waterproof and insulating soft rubber, or some waterproof silicone rubber materials are used. Filling: high-strength, mechanical-resistant jute rope or composite fiber rope or waterproof rubber. Wrap tape: Wrap a layer of ordinary water blocking tape on it, but if there is a metal shield, do not wrap the water blocking tape. Sheath: a special waterproof rubber is used, and the color is mostly black or white.


Conditions of use of JHS rubber sheathed cables: 1. Mainly used in power lines on submersibles with a rated voltage of 300/500V. 2. The commonly used cable cores include single core, double core, three core, four core, five core, 3+1 core, 3+2 core, and the commonly used cross-sectional area of ​​conductor is 1.5-300mm2. 3. Due to the use of cable Due to the particularity of the occasion, the maximum operating temperature of the cable during normal operation does not exceed 65°C.

Talk about the common misunderstandings of those wires and cables

Nowadays, there are many kinds of wires and cables, and their performances are diverse. When buying All Aluminum Alloy Cable

, many people choose to learn about the various parameters and evaluations of the cables on the network, but because the information on the network is too complicated, it is difficult to distinguish between true and false. , Some wrong viewpoints will cause misunderstandings to many people who browse and watch, so many misunderstandings about wires and cables are formed. Here is a summary of several common misunderstandings.

Misunderstanding 1: There is radiation in wires and cables

Many people have seen on the Internet that wires and cables have radiation. To be honest, there is radiation, but those who have a little knowledge of physics should know that everything that uses electricity has radiation. Even an electric fan has radiation. Except for those high-risk radiation products, the amount of radiation from ordinary wires and cables is negligible and basically negligible.

And what you may not know is that the radiation of wires and AAAC cables is even weaker than that of the mobile phones we carry around every day, so those who are afraid of radiation from wires and cables, the first thing to do is not to stay away from wires and cables, but Throw away the phone quickly.

There are also some people who worry about the magnetic field generated by wires and cables, and think that this kind of magnetic field has an unhealthy effect on the human body. If they are worried about the magnetic field, it is even more nonsense, because everyone knows that our earth has a natural geomagnetic field , And it has a larger range and stronger power. If the magnetic field is not good for the human body, the entire earth is no longer suitable for human habitation. Our Mars immigration plan can only be started in advance, so we are worried about the radiation magnetic field of wires and cables. I’m worried.

 

Smart grid boosts urban green development

In the future, smart cities will not only focus on high-efficiency and intelligent goals, but also include green, environmental protection and low-carbon development goals. The construction of smart grids will promote the green development of cities. With uneven energy distribution, a strong smart grid can greatly improve the grid’s ability to accept clean energy and optimize the allocation of energy resources on a large scale. More and more smart cities in our country are incorporating clean energy into the overall planning of smart cities. Especially abc cables played a huge role in this plan,realize the transformation of the economic development direction and the optimization and upgrading of the industrial structure. The goal is to build a modern and fully internationalized world ecological garden city, and the goal is to build a smart, green, and low-carbon livable city.


In the process of realizing the smart grid to promote urban green development, power cables play a prominent role in the construction of smart grids,the State Grid took the lead in practicing and established the National Wind and Solar Storage and Transmission Demonstration Project. The project is currently the world’s leading new energy comprehensive utilization platform integrating wind power, photovoltaic power generation, energy storage, and smart power transmission. Wind power will reach 1 million kilowatts, the total scale of photovoltaic installations will reach The scale reaches 110,000 kilowatts.


There are many participants in the construction of smart grids. With the construction of smart grids, its R&D and manufacturing levels will continue to improve, and the overall strength of the aaac industry will continue to improve. City-related industries will also develop rapidly and share market shares, creating conditions for smart grid-related industries to enter the international market. In addition, the improvement of the safe and stable operation of the power grid, the improvement of power supply reliability, and the high-quality power supply have also laid the foundation for the rapid growth of traditional industries and the rise of high-tech industries.

The important influence of aluminum alloy cables on wind power generation

The proposal of “carbon peak” and “carbon neutral” goals has accelerated the development of new wind and solar energy. In 2021, onshore wind power subsidies will be refunded, which will also intensify the demand for cost reduction of wind power, resulting in a rapid increase in the application of aluminum alloy cables. In addition, the introduction of new foreign technologies has promoted the rapid advancement of domestic wind power cost reduction programs.

The application of aluminum alloy cables in wind power has mature domestic cases, mainly in the fixed laying section of the tower. The introduction of new foreign technologies has further expanded the application of aluminum cables. The use of 8030 aluminum alloy conductors and the design of category 5 conductors make it possible to apply aluminum alloy cables in the torsion section.
By benchmarking the performance of foreign aaac conductors, the aluminum conductor adopts the same stranding process as the copper cable. Because the aluminum wire is lighter, the advantage of the aluminum cable is more obvious from the point of view of flexibility.

Reducing this cost saving is the eternal theme of the sustainable development of enterprises. The weight of the aluminum alloy conductor is reduced, and the load-bearing requirements of the sheath are simultaneously reduced, and the thickness of the sheath is also reduced in response, so the loss is smaller. Using aluminum alloy torsion cable design, the cable can be designed as a whole laying plan, which reduces the design of intermediate joints and can further reduce risks and costs.

Wind power has always been the main force in the development of new energy. How to ensure the long-term fast and efficient operation of wind turbines is the direction that wind power mainframe companies have been pursuing. Development of aluminum alloy cables has reduced the cost of wind turbine cables, reduced the risk of cable decline due to its own weight, and promoted the rational application of my country’s aluminum resources.

What are the selection methods of high-voltage cables

The ultimate principle for power supply lines in selecting cables is to ensure the safety of power supply, reduce costs to the utmost extent, and be reasonable in technical design.

The selection of AAAC conductor is mainly based on the following principles:

  1. Choose according to the duration and the maximum allowable load current. The selected cable will not generate heat after a long time of work, and the heat of the cable cannot exceed its allowable long-term temperature.
  2. Choose according to the voltage loss of the cable. The cable at the end that accepts the voltage has enough voltage, and the voltage loss must be small enough to ensure the quality of the power supply.
  3. Choose according to economic principles. The selected ABC  cable should be able to minimize the operating cost and achieve the purpose of economical power supply.
  4. Choose according to the mechanical strength of the cable. This is mainly to avoid cable damage or breakage due to insufficient strength during transportation or installation. Only when the strength meets the requirements can the safety of power supply be guaranteed.
  5. Choose according to whether the cable is stable enough when it is short-circuited. The cable must not exceed its short-circuit allowable temperature when it is short-circuited.