Flexible rubber joint

Flexible rubber joints, also known as rubber flexible joints, rubber expansion joints, etc., are a type of flexible rubber product used for pipeline connections. Here is a detailed introduction about it:

Structure and Principle

Structure: It mainly consists of an inner adhesive layer, a reinforcement layer, an outer adhesive layer, and metal flanges or other connecting components. The inner adhesive layer is in direct contact with the conveying medium and has the characteristic of resistance to medium erosion; The reinforcement layer is usually composed of multiple layers of curtain fabric or steel wire mesh, providing high strength and pressure resistance for rubber joints; The outer rubber layer plays a protective role, preventing damage to the rubber joint from external factors; Metal flanges are used to connect with pipelines.

Principle: By utilizing the good elasticity, high airtightness, medium resistance, and weather resistance of rubber, the displacement, vibration, and deviation of pipelines are compensated for through the deformation of rubber. When the pipeline undergoes expansion, bending, or vibration, the rubber joint can deform accordingly, thereby playing a role in buffering, damping, and sealing, protecting the safe operation of the pipeline system.

characteristic

Good flexibility: able to freely bend and expand within a certain range, adapting to various displacement situations of the pipeline, such as axial expansion, lateral displacement, and angular deflection.

Shock absorption and noise reduction: It has good absorption and isolation effects on vibration and noise in pipeline systems, and can effectively reduce the impact of vibration and noise generated during equipment operation on the surrounding environment.

Good sealing performance: It has excellent air tightness and water tightness, which can confirm that the medium inside the pipeline does not leak and protect the sealing of the pipeline system.

Corrosion resistance (based on actual reports): Different materials of rubber can be selected according to different usage environments, such as naturally grown rubber, nitrile rubber, EPDM rubber, etc., to make it have good resistance to chemical media corrosion such as acid, alkali, salt, etc.

Easy installation: The structure is simple, and there is no need for special tools or complex construction processes during installation, which can greatly shorten installation time and reduce installation costs.

Application industry

Water supply and drainage pipeline system: It is widely used in urban water supply, drainage, sewage treatment and other water supply and drainage projects to connect pumps, valves, and pipelines. It is used to compensate for pipeline displacement and vibration, protect the safe operation of pipeline systems, and facilitate equipment installation and maintenance.

HVAC system: Flexible rubber joints are used to connect air conditioning units, fan coil units, air ducts and other equipment in the chilled water, cooling water pipelines and ventilation pipelines of the air conditioning system. They can effectively absorb the displacement caused by temperature changes and equipment vibrations in the pipelines, and improve the stability and comfort of the system.

Industrial pipeline system: used for connecting various process pipelines in industries such as chemical, petroleum, metallurgy, and power. It can withstand pressure and corrosion from different media, compensate for thermal expansion, contraction, and mechanical displacement of pipelines, and protect the normal operation of industrial production.

Fire protection pipeline system: In the fire water supply system, flexible rubber joints can withstand the impact and vibration of water in the pipeline during a fire, confirm the normal delivery of fire water (based on actual reports), and provide protection for firefighting work.

Selection and installation precautions

Selection: Choose the appropriate type and specification of flexible rubber joint based on factors such as working pressure, temperature, medium, displacement, and installation space of the pipeline system. It should be noted that the pressure resistance level of rubber joints should not be lower than the working pressure of the pipeline system, and suitable rubber materials should be selected according to the characteristics of the medium.

Installation: During installation, it should be confirmed that the rubber joint is firmly connected to the pipeline, and the flange bolts should be evenly tightened to avoid deviation and leakage. Rubber joints should be avoided from being installed in environments such as direct sunlight, high temperatures, and oil stains to prevent accelerated rubber aging. In the pipeline system, brackets and fixing devices should be reasonably set up to reduce the burden on rubber joints and prevent them from being damaged due to excessive force. In addition, during the installation process, it is necessary to avoid scratching the rubber joints with sharp objects and excessive compression from external forces.