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Flexible Rubber Joint Buried Protective Device:

1. Product Introduction  

The buried protective device for flexible rubber joint developed by our company is designed with enough space around and has no influence on rubber joints’ displacement performance and can separate rubber joint from exterior earth layers and keep pipes freely moving at device ends without resistance. After installing pipe lines, the backfilled ground will be leveled off as usual, on which vehicles can run well, heavy materials be placed or equipment be stalled.

The buried device consists of two hollow hemicycles, which cover the rubber joint and pipe flat welding flange, there are two hemicycle planes on both ends and steel balls installed on exterior pipelines of flanges on two sides so as to help slide, which will not damage the pipeline exterior surface and ensure pipe line service period. The device exterior round surface and vertical plane support shall be based on earth layer depth so as to bear above pressure.

The device is equipped with some involution lock bolts for nest installation. Installation direction: install rubber joint, paint asphalt inside to protect device, install below 1/2 of protective device, put upside 1/2 of protective device, close involution lock bolt (keep the rubber joint remaining at the center of the device when installing), paint asphalt outside to protect device, backfill earth, tramp and press below and upside parts, concrete and cushion rubber, pave ground (better set permanent sign for later check and change).

The device is the only invention in the country and it was ever well used in Guangdong Dongguan 4th Water Supply Plant, Qinghai Salt Lake Project and Shanghai Changqiao Water Supply Plant in 2000, 2001 and 2002.

Special attention: Please provide buried depth so that we can design reasonable protective device for you. Generally the device can be used for over 30 years if anti-erosion on the device surface is well done.

2. Product Performance:

GJQ(X) series flexible rubber joint is a kind of flexible connection, mainly used to deliver liquid, gas, solid, etc. It adopts sphere body structure to compensate displacement, insulate vibration and reduce noise, which is a new rubber damping product.

3. Product Features:

(1) Economy: Compared with the systems of mechanic stretching and material damping, it has the advantages of little space covering, light weight, easy assembly and disassembly, labor saving and low cost. Its smooth inner wall can reduce flow resistance. It has good water tightness, so there is no need of gasket during the installation. It has wide application, large temperature-resistance scope and long working life. (This product can be used for 20 years if it is used indoors.)

(2) Displacement: Flange is free from pipe decentraction and imbalance. Its good flexibility allows compression, extension, distortion, deflection of vertical displacement, etc. which can prevent the pipeline from damage of deformation and foundation settlement arising from expansion caused by heat and contraction caused by cold.

(3) Shock and noise absorption: The large damping of rubber sphere can effectively buffer and isolate vibration, control and reduce mechanical vibration, and absorb fluid impact noise. The reasonable installation between vibrating machine and metal pipe can decrease structure-borne noise by 15-25 decibels.

(4) Pressure resistance: The multilayered sphere structure can especially endure internal pressure, withstand strong blasting force and impact, and prevent deformation from external pressure. There are many pressure standards on work piece.

(5) Reducibility: After external force compressed, it can recover to original state when this force is removed.

(6) Wide application: Different rubber material and formula can make product possess different resistance to heat, oil, corrosion, age, abrasion and ozone.

4. Classification

(1) According to appearance:Concentric with diameter rubber joint, concentric reducer rubber joint, eccentric reducer rubber joint.

(2) According to the structure:single ball flexible rubber joint,Double sphere rubber joint,spheres rubber joint, elbow sphere rubber joint.

(3) According to link the form:flange coupling,Threaded joint

(4) According to working Pressure:0.25MPa,0.6MPa,1.0MPa,1.6MPa,2.5MPa,6.4MPa

5. Application Range

Equipped with the excellent comprehensive performances of flexible rubber joint, the product can be used for lift and transportation of raw water and sewage, transportation of water supply, cooling cycle water of thermal power plant, condensate water of metallurgy industry and chemical materials of chemical industries, cooling and dilution of oil and chemical industries and flexible connection of other industries. It is also suitable to transport all grain and powder material and gas for its high abrasive resistance.

6. Sample of the Flexible Rubber Joint

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7. Work environment 

8. Certificates