Metal bellows are wave-like shape of the pipe like a regular, common metal bellows have carbon steel and stainless steel, but also lined with a steel, aluminum and so on. Mainly for small bending radii required non-concentric axial drive, or irregular turning, stretching, or absorb heat pipe deformation, or not easy to install using the occasion to make a fixed connection elbow pipe and pipe or conduit and Connect the device to use.
Properties of metal bellows, material selection and use, as described below.
Name Material Type Material
Code Operating temperature performance
Brass
Bellows H80 H -60 ℃ ~ + 100 ℃ lower elasticity, hysteresis and larger aftereffect, brazing better. Non-corrosive and can be used for high precision instrumentation as measuring element.
Bronze
Bellows QSn6.5 ~ 0.1 X -60 ℃ ~ + 100 ℃ elasticity, strength and corrosion resistance are good, and the springback is small hysteresis, a good soldering properties, is widely used as a measuring element.
Beryllium
Bellows QBe2 P -60 ℃ ~ + 150 ℃ has a small hysteresis and elastic aftereffect, high elastic stability, corrosion resistance, non-magnetic. Used for high-precision measurement instrument.
Stainless steel
Bellows 1Cr18Ni9Ti G -194 ℃ ~ + 400 ℃ with high flexural fatigue strength and corrosion resistance, good weldability. Can be used in corrosive media measurement, sealing, connecting and compensation components.
Initially, people used animal skins sewn into a tubular structure, the struggle to meet the needs of production. After a long period of time, the seventeenth century the Dutch Golden brothers made Wandell cover longitudinal suture canvas hose, at the time of the fire service is widely used. Later, with the development of rubber in the international market and the emergence of the vulcanization process, hoses and metal wire or twine and other fabrics armored hoses come out. However, the project some steam, high temperature hot medium like '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 under high temperature conditions, it's more difficult to ensure the safety and reliability.
Therefore, it gradually to focus on the metal pipe, the metal pipe geometry changes, it generates a corresponding corrugated inner and outer surfaces. In this way, both with the same flexibility with hose, meanwhile, also has a high temperature, low temperature resistance, aging resistance, corrosion resistance. So, as the metal bellows metal hose body thus produced.
1855, first published in German manufacturing bellows patents. It is the use of the principle of the then existing manufacturing jewelry to manufacture bellows. Three years later, the French and German H.Witzenmann E.Levavasseur cooperation in the development of new metal bellows, in August 1885 received a patent in France and Germany.
This is the S-shaped cross-section of the metal strip on the special equipment made of spiral wound without bellows, they use rubber bands, cotton or asbestos rope padding in the adjacent two turns at the seams, in order to facilitate the corrugated tube seal chamber.
In 1894, the structure of this type of bellows has been improved: People with two different metals with diameters in the opposite direction of the wound. Thus, the metal band in the state to achieve the mutual force balance, to overcome the shortcomings of spontaneous unfolding.
1929, in the structure of the bellows were another technological revolution, which completely solved the bellows rubber padding due to bending or asbestos rope grooves with uneven changes occur loss of sealing performance issues, thus opened up broad prospects for the development of the bellows. It is made of steel and zinc alloy material overall bellows, which uses
Seamless pipes or welds made of bellows, it relies on elastic deformation of the corrugated side walls to maintain a certain compressibility or stretchability, while ensuring a reliable seal.
From the beginning of the 1950s, double, triple, multi-bellows, especially very thin-walled stainless steel bellows developed rapidly. In order to meet the requirements, it is welded, electroforming, various process methods machine, hydraulic and mechanical spinning and other manufactured bellows. The minimum nominal diameter of 2 mm, the maximum nominal diameter of up to 400 to 500 mm, even for lO-meter diameter giant shaped bellows. Corrugated minimum number of l ~ 2 and a maximum of up to continuous hundreds, thousands, or even tens of thousands.
As the importance of the bellows metal hose body is concerned, the development of metal bellows, which means the development of metal hose.
Subsequently, people look at Bellows bread covered with other rubber, plastic or nylon material, armored nets, transformed by a variety of joints in the form of wire or metal band composed. In order to meet the different requirements of a variety of conditions to create various forms of metal hose.
Mainly composed of metal bellows (for a one-time molding) from both ends of the bellows section and part of the mating connector. The structure diagram shown in Figure (a) below.
Beijing Elias KONE products are:
Shockproof stainless fittings, stainless steel expansion joints, expansion joints shockproof stainless steel, stainless steel and the lateral expansion joints, stainless steel string type expansion joints, expansion joints stainless steel protection tube, metal hose, FM certified clean room for the fire sprinkler hose, FM certified commercial building Fire sprinkler hose, vacuum hose, Teflon hoses, rubber joints, spring shock absorbers, suspension shock absorbers, air shock absorbers and so on.
Our main products are described below:
1, shockproof joints; mainly in the import and export of such products at the pump is used to absorb vibration and noise of the pump fittings, we call shock joints, the country also known as metal hose or pump union, soft joints, Such cushioning joints of our design is to consider the point elasticity coefficient is small, the image of the talk is to be softer, softer the better, of course, also need to be considered when designing the instability when not under pressure. Specific to our product divided by shock joints and tie rod type grille shock joints, tie rod is divided into one-piece welded and style.
This can ensure the pipe integrally-formed type cleaning, and the flange is carbon steel, this can be used in a clean line to reduce costs.
2, expansion joints; expansion joints are divided into axial and lateral expansion joint expansion joints, axial expansion joints are mainly used to absorb horizontal pipeline expansion and compression. Lateral expansion joints, also known as Vientiane expansion joints, he came right angles to the direction of displacement amount absorbed by the offset ends of the bellows, expansion joints and is mainly used for settlement joint office.
3, heat medium oil shock steel wire hoses, hose using a special manufacturing process shockproof, high temperature and high pressure, safer than metal hose, pull off special circumstances nets still leak does not happen, you can win to replace the time, while the use of Omega waveform produced hose has the lowest modulus of elasticity, the best damping effect. HTM special shock oil hose manufacturing process up to 14 ring weld.
4, FM certified by the United States Fire sprinkler hose, into commercial buildings dedicated and clean room; adjustable mounting which commercial building, for a variety of ceiling skeleton. Cleanroom sprinkler hose connection comes fins can be fixed with screws on the T-T-keel.
Fire sprinkler hose installation which is 20 times the speed of traditional hard pipe, reduce installation costs, is widely used in the main ceiling systems. Our automated production line hose can reach 100,000 per month.
5, the vacuum hose. Feature is very soft and is widely used bio-pharmaceutical and electronics engineering and other fields.
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