hydraulic fittings Corrugated metal hose technology history

  Since 1855, German inventor and manufacturer of the world's first one corrugated metal hose since, after one hundred years of development, its reliable sealing metal hose , pressure resistance , high temperature resistance , corrosion resistance and flexible , and many other properties, widely used in aviation, aerospace, nuclear energy , shipbuilding and new construction and other industrial sectors , hydraulic fittings a modern piping systems essential components. With the rapid development of modern industry , metal hose is used widely for metal hose requirements are also increasing, bound to the metal hose technology more and more research , the development of metal hoses generally have the following stages :
      Initially , people used animal skins sewn into a tubular structure to meet the needs of the struggle for production . After a fairly long period , to 70 end of the century , the Dutch Golden Gai Wan del brothers made ​​a longitudinal suture canvas hose , at the time of the fire service is widely used . Later, with the rubber in the international market and the emergence of vulcanization process of development, hoses and metal wire or twine and other fabrics Kai mounted hose come out. But the works of some steam , hot air type high temperature medium ; liquid hydrogen , liquid oxygen, liquid helium cryogenic medium class ; gasoline, kerosene, acid , alkali and other corrosive media ...... If the hose to transport , of course not. Especially at high temperatures, it is more difficult to ensure the security and reliability .
      Therefore, it gradually to focus on the metal tube , the metal tube geometry to produce the corresponding corrugated external surface . In this way, both with the same flexibility with hose : but also has a high temperature, low temperature resistance , aging resistance, corrosion resistance. Thus, as the metal hose body metal bellows thus produced .
     1855 , first published in Germany in manufacturing bellows patents. It is used when making jewelry has some principles to manufacture bellows . 30 years later, the French and German cooperation in the development of new metal bellows , in August 1885 won the French hydraulic banjo fittings and German patents.
     l894 , the kind of bellows structure has been improved : People metal band by using two different diameter, wound in the opposite direction . Thus, the stress state of the metal strip in the lower reaches equilibrium with each other to overcome the shortcomings of the spontaneous unfolding .
    In 1929, the structure of the bellows had another technological revolution , which completely solved the bellows filled pad due to bending when asbestos rope rubber band or changes in the grooves of uneven sealing performance loss problems , thus opening up a corrugated tube broad prospects for development .
    From the 1950s began , double, triple , multi-layered bellows. Especially very thin-walled stainless steel bellows developed rapidly . In order to meet the requirements , it is welded , electroforming , machining, hydraulic and mechanical spinning process method to manufacture a variety of bellows .
    Corrugated metal hose from the tube as the significance of the body in terms of the development of metal bellows , metal hose means development .