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more+- Professor Chen Erfan, a leader of our company, was invited to attend the inauguration ceremony for the new location of Shenyang Zhilang Technology Co., Ltd. and visited its research achievements and new products.
- The 4th Annual Meeting of the Special Committee and the 3rd New Materials Science & Technology Conference Held in Hangzhou
- Professor Chen, a leader of our company, participated in the Standardization Technical Committee of the Chemical Industry and Engineering Society of China.
- Warm Congratulations on Our Company Being Awarded the Certificate of High-Tech Enterprise!
- Chairman Chen Erfan Participated in Liaoning International Rubber Technology Exchange Festival as a Specially Invited Expert.
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News
System Composition of Air-Cushioned Shield Dams
发布时间：2021-12-02
点击量：4656
The air shield dam system consists of steel protective plates, rubber airbags, restraint belts, anchoring parts, air compression systems and gate control systems. Based on the principle of air compression, inflating and deflating the airbags raises and lowers the steel protective plates to maintain a specific water level.
It enables stepless water level adjustment within the designed range and allows overflow over the top of the gate. When fully opened, the gate lies flat on the river bed for unobstructed water discharge, without affecting river landscapes and navigation. When fully closed, it retains water. Water will overflow to form a scenic view once the water level exceeds the preset value. It is an energy-saving and eco-friendly water conservancy facility.
Supported by rubber airbags for water retaining, the air shield dam features high safety and long service life. The high-strength cement plates can last more than 30 years, and the steel protective plates over 50 years, delivering remarkable economic benefits.
Rubber Airbag
The inner layer is made of material with excellent air tightness, and the framework adopts high-strength aramid material. The outer rubber layer is formulated with anti-aging and ozone-resistant rubber.
Both the pneumatic shield rubber dam and conventional rubber dam operate with airbags. However, due to substantial differences in materials and performance, their service lives vary greatly. The airbag of the pneumatic shield rubber dam is a three-layer structure: the inner layer is polyester-fiber reinforced synthetic rubber, the middle layer is single-component synthetic rubber, and the outer layer is a compound rubber resistant to ozone and ultraviolet rays.
Comparative studies show obvious discrepancies between the two in material composition and mechanical properties. Therefore, the bags of ordinary rubber dams cannot replace the airbags of air shield gates. Considering flexible operation, reliable performance and long service life, the dedicated airbags for air shield gates are the optimal choice.
Anchoring Parts of Air Shield Dam
The connection between inflatable airbags and supporting structures is one of the core technologies of the product. First, fix root angle steels, main anchor bolts and wedge angle steels on the river bed, then pour concrete after position adjustment.
The forged clamps are connected to main anchor bolts and supported by root angle steels. The airbag rests on the wedge angle steels, with its top flipped to the upstream side of the face plate and firmly pressed by forged clamps. It is further secured to the gate body via hinge cover plates and pressure plates.
Have you got a clear understanding of all components of the air shield dam? We will introduce more relevant knowledge in the next issue!