High quality rubber dams

Model:	JBD600-1100
Brand:	Qingdao Hua Chen
Origin:	Made In China
Category:	Industrial Supplies / Rubber & Plastics Machine
Label:	rubber dam , rubber bladder bag , rubber gate
Price:	-
Min. Order:	10 pc

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Product Description

High quality rubber dam is a kind of water project construction with advanced technology. A rubber dam is made of high Strength and good water resistance nylon canvas and aging durable compound rubber supported by a frame and prefabricated rubber, riveted on the concrete base board to form a sealed bag shaped space inflated water or air to store water. Discharge the water or air in the dam tube when no need to store water. Advantages of rubber dam are shorter construction period (final construction period 3-6 months). Less engineering budget and it can save 40% than that of civil works. Rubber dam has the features of long service life, simplified maintenance and improved vibration resistance.

Inflatable rubber dams are cylindrical rubber fabrics placed across channels, streams and weir or dam crests to raise the upstream water level when inflated. The membrane is a multi-layer fabric made of synthetic fibre (usually nylon)and rubberised on one or both sides. The fabric is quite flexible and yet exhibits good wear-resistance characteristics. A layer of stainless steel mesh or ceramic chips can be embedded in the surface layer to reduce or prevent vandal damage.

Inflatable rubber dam can be filled with water, air or both. They are low pressure - typically 4 to 10 psi. The present trend s ests an increased use of air-filled membranes because they can be deflated or inflated more rapidly, and they are little affected by freezing conditions. Characteristic dimensions cover typically lengths of about 100 m with specially-made membranes up to 200-m wide, dam heights usually less than 5-m but some special designs might be up to 10-m high. The membrane is usually deflated for large overflows. It is however common practice to allow small spillages over the inflated dam. During overflows greater than 20% over-topping, vibrations might result from fluid-structure interactions,^[1] and the instabilities might damage or destroy the rubber membrane. Several failures were experienced (e.g. CHANSON 1996). In practice, a deflector (i.e. fin) is installed on the downstream face of the rubber dam to project the nappe away from the membrane, hence preventing rubber membrane vibrations.