At present, the global valve leaders are mainly concentrated in North America, Japan and Germany. The world's well-known valves are mainly Emerson, IMI, Kitz Group, Flowserve, GE, Crane Company, Metso, Cameron (Schlumberger) and KSB Group. These companies have complete product types and deep technical accumulation. They have established perfect production, sales and after-sales organizations all over the world, and have stable downstream customers. In a short period of time, it is difficult for companies to break the existing market structure.
After decades of development, China's valve industry has made great progress. At present, the number of valve companies in China ranks first in the world, and the level of valve production has also been greatly improved. The valve revenue has achieved a substantial increase. The main products of China Valve have basically met the needs of the domestic market. The complete set rate, complete set level and complete set capacity of the valve market have been greatly improved. The domestic valve has already had a certain revitalization foundation. However, China's valve industry is still dominated by small and medium-sized enterprises, only a few of the world's most influential and well-known valve companies such as Newway Valve, Sanhua and China Yuanda Valve.
Valve companies need to change the existing production relations to strengthen technological innovation. Faced with the increasingly serious problem of homogenization, the valve industry is now gradually falling into a vicious competition circle that cannot escape in the wireless cycle. In this grim situation, valve companies need to clearly understand that low-cost, low-tech valve products flood the market, not only disrupt consumer judgment and purchase desire, but also hinder the mature transition of the valve market. Therefore, if valve companies want to improve production efficiency, they must first change the existing production relationship, increase investment in modern production lines, and strengthen technological innovation. At present, valve companies must insist on innovation, structural adjustment of products, transformation of traditional products, and advance to high-end valves.
1. According to the compaction principle, it can be divided into static action roller and vibratory roller. Static action roller (including static smooth wheel roller and tire roller) compacts the soil by the static pressure generated by the self weight and load of the roller. Vibratory roller relies on the combined action of high-frequency vibration and exciting force generated by the vibrating mechanism
2. According to the number of rolling wheels, it can be divided into single wheel roller, double wheel roller, three wheel roller, etc.
3. Self propelled roller can be divided into mechanical transmission roller, mechanical hydraulic transmission roller and full hydraulic transmission roller according to its power transmission mode.
4. According to its structural weight, it can be divided into light, small, medium, heavy and ultra heavy rollers.
The road roller, also known as the soil compactor, is a kind of equipment for road construction.Road rollers belong to the category of road equipment in construction machinery. They are widely used in filling and compacting operations of large-scale engineering projects such as high-grade highways, railways, airport runways, dams, and stadiums. They can roll sandy, semi-cohesive and cohesive soils, Subgrade stabilized soil and asphalt concrete pavement layer.With the gravity of the machine itself, the road roller is suitable for various compaction operations, so that the rolled layer can be permanently deformed and compacted.Road rollers are divided into two types: steel wheel type and tire type.
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