Do you know the use and advantages of precision bellows?

Prestressed precision corrugated pipe is also called metal corrugated pipe, metal spiral pipe, concrete filling pipe and corrugated pipe for anchor bolts. The precision bellows is made of high-quality steel strips, which are made into round and flat bellows through rolling, tube forming, biting and cutting. Nowadays, prestressed concrete structures are increasingly used in buildings, and prestressed corrugated pipes are necessary for prestressed concrete structures. precision corrugated pipe uses:

Precision corrugated pipes are mostly used in large buildings such as bridges, multi-storey factories, parking lots, office buildings, apartment buildings and gyms.

In modern buildings, it is light in weight, thin in wall, strong in rigidity, not fragile, and no mud. Due to the obvious concave-convex double waves on the pipe surface, the steel pipe joint is tightly embossed and firm without tripping. After on-site pouring, it has a strong retention force when in contact with concrete, and is integrated with concrete, which enhances the seismic performance of the structure. It has a good function. Compared with ordinary solid panels, it has light weight, large span, small deflection, no column cap, good safety, and low comprehensive cost, thereby increasing the building clearance and increasing the use and sales area. Compared with the existing ordinary beam slab structure, solid non-beam slab and unbonded prestressed concrete floor slab in China, it saves 5%-7% of steel, 10%-30% of concrete and vertical water consumption.

Types of precision bellows: mainly divided into metal (stainless steel and carbon steel) bellows and plastic bellows. Metal bellows are mainly used to compensate for thermal deformation, shock absorption and absorption of settlement deformation of pipelines, and are widely used in petrochemical, instrumentation, aerospace, chemical, electric power, cement, metallurgy and other industries. Bellows made of other materials, such as new materials, play an irreplaceable role in media transmission, power threading, machine tools, home appliances and other fields. Metal bellows are used for thermal expansion and contraction of pipes.

Precision bellows in the use of the function has the following advantages:

Strong and light: the strength of steel is high, and the mechanical properties can be improved through corrugation; the structure is small in size and light in weight.

Excellent performance: circumferential stiffness and axial flexibility are good, strong deformation resistance and foundation adaptability, which can meet the special requirements of poor geology; Soil-steel interaction makes the structure stress reasonable, load distribution is uniform, and the overall flexibility greatly improves the fatigue performance and seismic performance of the structure. Concrete has no shrinkage, creep and temperature cracks.

Durability: A large number of engineering examples show that the service life of galvanized corrugated steel (pipe) can reach 50 to 100 years, and the structure has been in service for more than 100 years.

Fast: Factory processing and on-site assembly are implemented separately, which greatly shortens the construction period (more than half); and the construction is not affected by temperature and environment, thereby extending the construction period. Easy: Transportation and on-site splicing construction do not require large mechanical equipment, and most splicing only requires manual operation. The construction is convenient, fast and easy to operate, which is conducive to reducing costs and controlling quality.

Environmental protection and low carbon: cement, wood, sand and other regular building materials are all reduced or abandoned, the waste soil (slag) is reasonably used, the damage to the environment is small, the noise and vibration is small, which is conducive to environmental protection and reduce carbon emissions.

Less maintenance: galvanized corrugated steel plate (tube) has strong corrosion resistance, the structure does not need to set expansion joints, supports and other vulnerable parts, and the structure hardly needs maintenance during later operation.

Easy to replace: without interrupting the traffic, it is convenient to replace the reinforced new pipe (arch) with the inner ferrule to make it glow with new life.