A vulcanized expansion joint is a special type of expansion joint whose skin (i.e., non-metallic fabric layer) is vulcanized. Vulcanization is a chemical process commonly used in rubber products by adding sulfur or similar compounds under heating conditions to cross-link rubber molecules, thereby enhancing their physical properties such as hardness, elasticity, and heat resistance. The following are the main roles of vulcanized expansion joints:
Compensatory effect
Due to thermal expansion and contraction, during the installation process, the pipeline will inevitably be deformed, resulting in leakage at the pipeline connection. The vulcanization expansion joint can play the role of telescopic compensation, compensating the displacement caused by thermal expansion, mechanical vibration or installation error of the pipeline.
Sealing action
The vulcanized material has better sealing properties and can prevent gas or liquid leakage more effectively. This is especially important in long-distance pipelines in petroleum, chemical industry, electric power and other industries, which can replace flange joints to eliminate the interface leakage problem caused by temperature difference and mechanical vibration.
Absorption displacement
The vulcanized expansion joint can effectively prevent axial expansion and contraction caused by temperature difference and axial thrust generated by rotation or oscillation at any angle. It is especially suitable for the pipeline system with shock absorption requirements, which can greatly reduce the resonance frequency and noise value of the pipeline system.
Noise reduction effect
The elastic element of the vulcanization expansion joint has good sound absorption effect, can effectively reduce the amount of noise pollution generated by the operation of power equipment such as water pump and fan, and avoid the occurrence of water hammer phenomenon.
Silencing and noise prevention
&n bsp; After installing and using vulcanization expansion joints in water supply pipe network system, it can effectively reduce the amount of noise pollution, improve the living environment of residents, and improve the living standard and working efficiency. In addition, it can make the valve open more smoothly and smoothly without jamming feeling.
Thermal insulation
When the medium is hot water, choosing the insulation layer made of rubber and plastic material with good insulation performance and not easy to corrode can not only keep the water temperature within a certain range without drastic temperature change, but also keep the quality of the conveying medium unaffected.
Extended service life
Vulcanization increases the durability of the material and helps the expansion joint to work stably for a long time under harsh working conditions, thereby extending its service life.
Improved mechanical stability
The vulcanization process improves the stability and consistency of the material, allowing the expansion joint to perform more reliably when subjected to pressure and displacement.
Better weather resistance
Vulcanized non-metallic expansion joints are better resistant to UV rays, ozone, and weather aging, making them suitable for outdoor and extreme weather conditions applications.
In summary, vulcanized expansion joints play an important role in the industrial field, especially in situations where thermal expansion compensation, sealing, noise reduction and service life extension are required.