The automobile wiring harness is fixed on the entire vehicle body, and the damage of the wiring harness directly affects the performance of the automobile circuit. Here is an introduction to the characteristics and usage scenarios of various threading protective wraps for automobile wiring harnesses. Automotive wiring harnesses should have high and low temperature resistance, resistance to temperature and humidity cycle changes, vibration resistance, smoke resistance and industrial solvent resistance. Therefore, the outer protection of the wire harness plays a vital role. A reasonable outer protection material for the wire harness can not only ensure the quality of the wire harness, but also reduce costs and improve economic benefits. The most common way to protect automobile wiring harness is to thread the corrugated pipe. The following describes the threading corrugated pipe used for the automobile wiring harness in detail.
Threading plastic corrugated pipe:
Plastic corrugated pipe occupies a large amount in car wiring harness wrapping. The main feature is good abrasion resistance, high temperature resistance, flame retardancy, and heat resistance in high temperature areas. The temperature resistance is generally between -40 and 150°C.
According to the dressing requirements, plastic corrugated pipes are generally divided into closed corrugated pipes and open corrugated pipes.
Closed bellows and wire harness clamps can have a good waterproof effect, but it is more difficult to assemble. The open corrugated pipe is commonly used in ordinary wiring harnesses and is relatively easy to assemble. According to different wrapping requirements, PVC tapes are usually wrapped around the corrugated pipe of the wire harness in two ways: full winding and point winding. To
According to the material, the commonly used plastic corrugated pipes for automotive wiring harnesses are divided into four types: polypropylene (PP), nylon (PA6), polypropylene modified (PPmod) and triphenyl phosphate (TPE). Commonly used inner diameter specifications range from 4.5 to 40.
PP corrugated pipe has a temperature resistance of 100°C, which is the most used type in the wiring harness
PA6 corrugated pipe has a temperature resistance of 120℃, which is more prominent in flame retardancy and abrasion resistance, but its bending resistance is lower than that of PP material.
PPmod is an improved polypropylene, with a temperature resistance level of 130°C.
TPE has a higher temperature resistance grade, reaching 175°C. ,
The basic color of the bellows is black, some flame retardant materials are allowed to be slightly gray-black, and yellow can be used for special requirements or warning purposes (such as airbag wiring harness bellows)
Nylon corrugated pipe is an important part in modern industry. It is made of high-quality nylon material and has excellent physical, chemical and electrical properties. The main function is electrical insulation of connectors, rust and corrosion protection of solder joints, mechanical protection and wire harness protection. It is widely used Machinery manufacturing, electrical insulation protection, lighting equipment, automobile manufacturing, aviation equipment, subways, trains, automation control and other industries.
Nylon bellows have good elasticity and are easy to curl. It is mainly used for wiring in electronics, new energy automobile wire harness corrugated pipes, wires and cables, machinery and construction industries to protect power supplies or cables from external scratches, achieve good wire protection effects, and enhance aesthetics. During use, to a large extent, it is only necessary to pass wires or cables into the tube and then lock the fixed head. The nylon bellows is made of PA6 nylon or PA66 nylon. Ordinary nylon bellows are divided into two types: standard type and flame-retardant type. Standard nylon bellows are generally black, but also white, orange, yellow, etc., with wavy interior and appearance.
Nylon bellows have strong waterproof and flame retardant properties. Flame retardant bellows are made by adding flame retardants to ordinary bellows. The bellows made by adding flame retardants during the production process are also flame retardant bellows. Strong corrosion resistance, acid and alkali resistance, etc., are widely used in the new energy automobile industry, mainly used in automotive wiring harness assemblies, including: automotive air conditioning pipe sheaths, wiring harness bellows, wiring harness flame retardant bellows, Automobile vent pipes, drip pipes for refrigerated transport vehicles, automotive wiring harness pipes, automotive brake system protective sleeves, car oil and gas pipes, machine tool wiring harness pipes and other automotive corrugated pipes, air-conditioning drip pipes. Compared with the metal hose, the cost is lower, and the surface is smooth and easy to install.
The plastic corrugated pipe has high compressive strength and is not afraid of stepping on it. It is not easy to be broken by vibrating force. Its sealing effect and anti-leakage effect are higher than that of corrugated hoses. It is more suitable for vacuum pump grouting; plastic corrugated pipes are not conductive. , Can avoid the corrosion of stray current, and metal materials are good conductors of electricity; plastic bellows have a good diligent and studious effect, and can further improve the fatigue of the prefabricated components. The material of the material bellows is.
Its corrosion resistance is far better than metal materials, it is not afraid of acid and alkali corrosion, it does not corrode itself, and it can reasonably protect and maintain the prestressed tendons from corrosion. Many prestressed structures bear more serious external damage, such as melting ice salt or salt water. When the post-tensioned prefabricated component is broken or ineffective due to the collapse of the ground waterproof, the water seepage in the micro gap, and the obstruction of the drainage system.
The pre-stressed tendons may suffer from the actual effect of corrosion. The plastic corrugated pipe can provide a natural barrier for the prestressed tendons, which is far better than the corrugated hose, to protect and maintain the actual effect. It can avoid the environmental pollution of harmful substances through the pipeline, and then ensure that the post-tensioned prestressed structure has a good effect. Performance.
What are the uses and advantages of plastic bellows? The main use of prestressed plastic corrugated pipe products: prestressed plastic corrugated pipes are used in road bridges, railway line bridges, engineering construction, water conservancy projects, power engineering and other national priority projects. Product characteristics of prestressed plastic bellows: 1. Stiffness test: anti-centralized load 0.75KN or symmetrical load 1.5KN.
The rapid development of modern science and technology has made international exchanges more frequent and convenient, and the formation of economic globalization, regional integration, and market internationalization is the general trend. With the continuous development of all walks of life, the social Darwinism of the survival of the fittest has gradually emerged. Taking the automobile industry as an example, the original model of taking the automobile body as the core competitiveness has changed to a new structure of "main body + peripheral products + service", and the automobile aftermarket has emerged as the times require.
As an industry dominated by supporting facilities and services, the automotive aftermarket is the key to winning the market if it wants to create a good business model. Xiangyier Intelligent Technology Group, which has decades of industry experience, understands this principle. As a large enterprise with dual tools of industrialization and technology, Xiangyier takes "building the country's top car aftermarket service platform" as its mission and has persisted for many years. Innovation aims to bring new, smarter and more convenient user experience to car owners and friends. This year, the smart car urea refueling project launched by Super Jies, a nationwide joint deployment of 1000+ operation centers and 6w+ smart refueling stations, seizes the blue ocean market, shuffles the traditional car urea industry, and provides entrepreneurs and users with Come for business opportunities.
In 2020, with the implementation of a series of related policies such as the National Sixth Standard, diesel vehicles are required to compulsorily use automotive urea. Behind a large market of 100 billion yuan, the landing of smart automotive urea filling stations is showing a blowout trend. Compared with traditional barreled car urea, the Sojix intelligent filling project eliminates a series of problems such as labor, inventory, and stocking costs. Based on "intelligence", intelligent Internet of Things, intelligent filling, intelligent drainage, and intelligent system The six intelligent modules of distribution, intelligent logistics, and intelligent operation interact with each other to promote the evolution of new business formats and new economic models. And always adhere to the closed loop of production localization, real-time supply and transportation, sales automation and sharing spontaneously. The thousand-member iron army team is spread all over the country and has long-term roots in various regions and has a leading market share. At the same time, 100 million will be spent on all-media accurate advertising to help upgrade the brand's influence. This series has accumulated deep product advantages and rich operating experience for Super Jies. The nationwide refilling network also facilitates the use of car owners and friends, and seizes the industry's first opportunity in one fell swoop.
Automotive Urea Intelligent Filling Station solves the problems of urea specification, uneven quality, and inconvenient filling, which improves the user experience and enhances the core competitiveness of the product. To a certain extent, it also helps operators reduce the difficulty of operation, improve operational efficiency, achieve the effect of drainage, and achieve steady growth in profitability. In addition to urea for vehicles, SJJ also has equipment such as glass water intelligent filling, and has 20,000 customers across the country, accumulating energy for partners, going forward together, enjoying the blue ocean wealth business opportunities, and win-win in the automotive aftermarket. A round of bonuses.
At present, the automobile industry is entering the biggest change in more than a hundred years, which can be called the "automobile revolution." New energy vehicles will be the prelude to a new round of automotive revolution, and the green, connected, and intelligent trends of vehicles will fully release the economic potential of future automobiles. Wang Chuanfu, chairman of BYD Auto, believes that "China's new energy vehicles have entered the'fast lane' and are ushering in a larger-scale market'burst period'." Industry experts believe that with the development of new energy vehicle technology, energy conservation and emission reduction policies The guidance of China and the concept of green consumption are gradually gaining popularity, and China’s new energy automobile industry will continue to release new green kinetic energy for China’s economic development. China will be the world's largest new energy vehicle market, and it has huge development potential.
Recently, the "New Energy Automobile Industry Development Plan (2021-2035)" released by the state stated that by 2025, the sales of new energy vehicles and new vehicles will reach about 20% of the total sales of new vehicles. By 2035, pure electric vehicles will become The mainstream of newly sold vehicles. As policy support continues to increase, the domestic new energy automobile industry is gaining momentum, and monthly production and sales in the second half of this year are both higher than the same period last year. According to data from the China Association of Automobile Manufacturers: my country's new energy vehicle market in October sales increased by 104.5% year-on-year, marking the fourth monthly sales record in 2020. There are more and more people buying new energy vehicles, and the market is calling for a perfect fluid solution for the new energy vehicle OEMs' loading and after-sales market maintenance needs.
It can be seen in major automobile forums that many people are paying attention to the difference between the maintenance of electric vehicles and traditional fuel vehicles. The heat dissipation of the power system is a hot topic.
Electric vehicles also need high-quality coolant
Pure electric vehicles are powered by an on-board power supply, which converts electrical energy into mechanical energy to drive wheels through a motor.
The vehicle power supply and motor will produce certain losses during the working process. These losses are radiated outward in the form of heat. An effective cooling medium and cooling method are required to take away the heat to ensure that the motor is in a stable cooling and heating cycle balance. Operate safely and reliably.
At present, due to the different key technologies adopted by various automakers, the design of electric vehicle power systems and related cooling systems has not yet formed a unified and mature industry technology evaluation system. We can learn about electric vehicle cooling systems through the relevant designs of some mainstream brands. The general structural characteristics of the.
Schematic diagram of a certain brand of electric vehicle driving motor cooling system structure
As can be seen from the above figure, the drive system of the brand's electric vehicles adopts a combination of air cooling and liquid cooling to ensure the safe operation of the entire system. The liquid cooling system relies on the cooling water pump to drive the coolant to circulate in the cooling pipeline. Through the process of heat exchange in the radiator, the coolant takes away the heat generated by the motor and the controller.
In the entire cooling system, the coolant plays a very important role. Like fuel vehicles, the power system of electric vehicles also requires the coolant to have triple protection against corrosion, overheating, and frost.