The raw material for plastic bellows is HDPE. Its corrosion resistance is far superior to that of metal. It is not afraid of acid and alkali corrosion. It does not corrode itself and can effectively protect prestressed tendons from corrosion. Many prestressed structures are subject to severe external influences, such as deicing salts or salt water. The prestressed tendons may be corroded when the rear members are collapsed due to the collapse of the waterproof layer, water leakage from the micro cracks, and clogging or failure of the drainage facilities. The plastic corrugated pipe can provide a barrier protection function for the prestressing tendon far superior to the metal bellows, and can prevent the harmful substances from penetrating the pipeline, thereby ensuring better durability of the post-tensioned prestressed structure. The installation of the plastic bellows can accurately calculate the length of each control point of the bellows by means of a space model. The control points mainly refer to the flat and vertical bending control points.
First, plastic bellows classification
1. According to the materials used in the production of plastic bellows, it can be divided into "HDPE bellows", "UPVC bellows", "PP bellows" and so on.
2. According to the structure of the plastic bellows, it can be divided into "single wall corrugated pipe" and "double wall corrugated pipe".
3. According to the use of plastic bellows, it can be divided into:
Wire and cable sheath corrugated pipe (outer diameter 12mm-32mm)
Drained and permeable single wall corrugated pipe (outer diameter 90mm-160mm)
Drained and permeable double wall corrugated pipe (outer diameter 75mm-400mm)
Telecom power cable sheath double wall corrugated pipe (outer diameter 90mm-400mm)
Prestressed anchor cable sleeve.
Second, the characteristics of plastic bellows:
1. The prestressed bellows plastic corrugated pipe has high strength, strong resistance, strong sealing and no leakage.
2, the ring stiffness is strong, the friction coefficient is small, anti-aging, anti-corrosion, improve the anti-corrosion effect of the prestressed tendons.
3, strong fatigue resistance, good insulation performance, good flexibility, not easy to be broken by the rod.
4. Simple installation and convenient construction.
Single wall corrugated double wall corrugated pipe
The inside and outside of the pipe structure are corrugated and the inner wall is smooth, and the outer wall is corrugated.
Bending performance can be arbitrarily curved and the curvature is small
Packing method infinitely long package length 6 m long
High rigidity, high pipe, hard resistance, external pressure
Outer diameter size 10mm-50mm75mm-160mm90mm-400mm
Flame-retardant ordinary single-wall corrugated pipe
Corrugated wire casing small bellows
Punching water can be
Uses such as golf course, sports field and other light loads, such as drainage, water permeable; indoor decoration wire casing; automotive wire casing; prestressed anchor cable casing; air conditioner drainage pipe and other heavy traffic conditions such as highways, slopes, golf courses, etc. Drainage, permeable; municipal sewage; communication, power cable casing
Third, the performance of plastic bellows
1. It has both rigid and soft properties. It has sufficient mechanical properties and excellent flexibility. Compared with plate-type pipes, the bellows per unit length has light weight, saves materials, reduces energy consumption, and is cheap and chemically resistant. Can withstand the effects of acid and alkali in the surrounding environment;
2. The corrugated shape can strengthen the load resistance of the pipeline to the surrounding environment without increasing its flexibility, so as to be continuously laid on uneven objects; the interface is convenient and the sealing performance is good, the handling is easy, the installation is convenient, and the labor is reduced. Strength, shortened construction period Wide operating temperature range, flame retardant, self-extinguishing, safe electrical insulation performance, ideal for wire casing.
Fourth, the application of plastic bellows
Suitable for vacuum pumping of powders, granules, conveying water, oil, chemical materials, food, etc. in industrial, mining, agricultural and water conservancy, civil engineering, food, petroleum, chemical, health and other industries, high flow rate, very abrasive sand, broken Stone, fine grain, useless glass and chips, gas and liquid environment, silo transportation, glass industry, dock, steel plant, mine pit, shipyard, cement plant, etc., when the tube is strong and protective. It has a wide range of uses in the fields of farmland irrigation, industrial and mining, oil depot, sand pumping, sand blasting, food, medicine and indoor gas, powder and dust absorption and discharge. This product is the best alternative to PVC, rubber and metal pipes.
Superabrasives come in the form of grinding wheels and are used when the material being processed is either too hard or too delicate for regular abrasives.
Industrial diamonds are one of the most common materials used to create the grinding material. Contrary to popular belief, diamonds are not as rare as marketing campaigns will tell you.
After diamonds,cubic boron nitride is the second more durable material for cutting. This is followed by polycrystalline.
The most obvious advantage is that these Grinding Wheels are extremely hard and durable. This allows them to give better performance and greater longevity over regular abrasives.
When your wheel lasts longer you will see reduced costs for fixtures and tooling. This opens up your budget up to investing in more machines.
You will notice that the wear and cuts on your materials will be even. Because the abrasiveness of the wheel is so strong, it doesn`t develop uneven worn away spots as quickly as regular abrasive wheels.
So the output from your production will be consistent. So your manufacturing efforts will produce reliable and consistent results.
It can be tough to justify the upfront increased costs of superabrasive wheels. But the durability and quality of their production output make them well worth it.
But you`ll quickly realize that your productivity has increased by using superabrasives. You will have more parts processed per wheel and fewer wheel changes.
Kemei produces both conventional grinding wheel and super abrasive grinding wheels, such as white aluminum grinding wheel, pink wheel ,green silicon wheel, diamond grinding wheel and CBN grinding wheels.
If you need any type of grinding wheel and any suggestion on grinding wheels, just contact us.
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Henan Jinlun Superhard Material Co., Ltd , https://www.kmgrindingwheels.com