93results about How to "Not susceptible to corrosion" patented technology

The invention discloses a prefabricated evacuation platform for a shield interval tunnel. The prefabricated evacuation platform comprises prefabricated evacuation platform brackets connected with shield segments and prefabricated platform plates, wherein the prefabricated evacuation platform brackets comprise supporting oblique beams and bottom beams; the supporting oblique beams are connected with cross beams; certain sides of the cross beams are connected with reserved bumps; the supporting oblique beams, the bottom beams, the cross beams and the reserved bumps are of a prefabricated integrated structure; the supporting oblique beams, the cross beams and the bottom beams define a space; the cross beams are used for supporting the prefabricated platform plates; the prefabricated platform plates are erected on the cross beams of the two prefabricated evacuation platform brackets; the corners of the prefabricated platform plates are provided with notches which are matched with the reserved bumps; the bottom beams are provided with reserved holes; the bottom beams are fixedly connected with the shield segments. The prefabricated evacuation platform and the segments are reliably connected, the stress is rational, the cambered bottom beams can be used for excellently transferring a load, and the positioning accuracy of mounting is improved; the platform plates are fixed by the reserved bumps on the end parts of the cross beams, so other mechanical connection of the platform plates and the cross beams is reduced, and the mounting and the construction are more convenient and faster.

The invention discloses a formaldehyde-removing coating with an absorption function and a decomposition function. The coating solves the problems that an existing coating gives off harmful matter such as formaldehyde to the air and does not have a formaldehyde-removing function. The coating comprises, by weight, 25-30% of ground calcium carbonate, 10-15% of emulsion, 4-10% of calcined kaolin, 4-10% of washed kaolin, 4-10% of titanium dioxide, 4-10% of modified sepiolite and nano TiO2 composite materials, 0.1-0.6% of dispersant, 0.1-0.6% of wetting agent, 0.1-0.6% of defoamer, 0.1-0.6% of multifunctional promoter, 0.1-0.6% of mildew preventive, 0.1-0.6% of coalescing agent, 0.1-0.6% of anti-freezing agent, 0.1-0.6% of fungicide, 0.1-0.6% of thickener and 25-30% of water. The invention further provides a preparation method of the coating. The coating has strong formaldehyde-removing performance, and is safe and reliable.