At present, the anticorrosive anticorrosion of the steel cable stayed bridge and the bridge body coupling base (commonly known as the head) is mainly painted with anticorrosive paint, or rubber, plastic and foam preform are used for sealing and anticorrosion. There are a large number of cars passing by the cable-stayed bridge every day, and they will be hit by wind and rain. The steel cable and the bridge body connecting base will undergo numerous irregular shaking every day. The anti-corrosion coating will be painted with anti-corrosion seal. The anti-corrosion coating will not meet the requirements of long-term anti-corrosion due to the lack of flexibility, weather resistance and UV aging. The coating will be exposed outdoors for a long time Aging and embrittlement will occur, which will affect the anti-corrosion sealing effect.
In order to solve the problem of the phenomenon of falling off of the coating exposed in the long term when the anticorrosive paint is used in the existing technology, the coating needs to be repaired frequently. The rubber, plastic and foam preforms are used for anticorrosion and sealing, because the prefabricated parts are separated structures, glued together or glued together, resulting in the overall corrosion resistance and sealing effect of the products. Plastic, and foam prefabricate materials will also be exposed for a long time due to aging and brittle cracks, which will affect the anti-corrosion and sealing effect. The G-APEX heat shrinkable tube provides a kind of anticorrosive and sealing heat shrinkable component of the cable connecting bridge base of the cable stayed bridge -- KYNAR semi hard PVDF heat shrinkable bushing.
Kynar semi hard PVDF heat shrinkable sleeve
The anti-corrosion sealing heat shrinkable component of the steel cable connection base of the stay cable bridge includes the heat shrinkable sleeve and the bush. The Bush is arranged in the heat shrinkable sleeve which is connected by the connecting member.
The steel cable-stayed lock and the stay cable base are made of the glass fiber reinforced radiation crosslinked polyethylene heat shrinkable material coated with anti-corrosion hot melt adhesive into the anti-corrosion sealed heat shrinkable sleeve connected with the stainless steel chain. The glass fiber reinforced radiation crosslinked polyethylene heat shrinkable material has strong weather resistance, UV aging resistance, strong adhesion and good flexibility between the inner anti-corrosion hot melt adhesive and the steel lock No aging, water seepage and other phenomena will occur, and the service life of anti-corrosion seal can exceed 20 years.
Figure 1. Schematic diagram of external structure of heat shrinkable sleeve
Figure 2. Schematic diagram of sectional structure after installation and molding
In the figure, the heat shrinkable sleeve 101, the sleeve 102, the connecting member 103, the stay cable 104 and the stay cable base 105
As shown in the figure: the anti-corrosion sealing heat shrinkable component of cable connection base of stay cable bridge includes heat shrinkable sleeve and bushing, the bushing is set in the heat shrinkable sleeve, and the heat shrinkable sleeve is connected by the connecting component. The heat shrinkable sleeve is made of glass fiber reinforced radiation crosslinked polyethylene heat shrinkable material coated with anti-corrosion hot melt adhesive. The inner surface is coated with anti-corrosion special hot melt adhesive strip, and the sleeve is a foldable aluminum sleeve.
During the installation, the steel cable 104 and the stay cable base 105 shall be pretreated as required (mainly by applying butter, etc.), then the aluminum bushing 102 shall be folded and installed according to the shape of the stay cable base 105 and bound with electrical tape, the heat shrink sleeve 101 and the stay cable 104 shall be wrapped on the installed liner 102, and the heat shrink sleeve 101 shall be heated by the liquefied gas spray gun to completely seal, and the inner layer of the hot melt adhesive shall be melted When the stainless steel chain overflows evenly, the assembly is completed.
Construction site drawing of steel cable bridge
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