Cooling tower water leakage and waterproof repair method process

　　1. Repair FRP defects and damages during processing or use and maintenance. Such as pores, delamination, degumming, inclusions, poor glue, rich glue, incomplete resin curing, fiber bending, wrong paving sequence, fiber voids generated during hand lay-up and curing molding; scratches generated during mechanical processing and assembly The structural abnormalities caused by scratches, bumps, collisions, degumming, fiber breaks, non-straight holes, over tightening, etc., which do not meet the design requirements, should be repaired.cUtCooling tower noise reduction treatment manufacturer

　　Repairable defects are the outstanding features of FRP and fiberglass cementitious composite materials. These repairs are almost all done by hand. The connection of FRP, whether it is mechanical or glued, is to a large extent repairing and repairing FRP. Enhanced measures.cUtCooling tower noise reduction treatment manufacturer

　　The repair of FRP can be divided into surface damage repair and structural damage repair. The repair of surface damage is more than the repair of structural damage. The repair process is the same as that of FRP molds and other products. The repair process is shown in Figure 11-19.cUtCooling tower noise reduction treatment manufacturer

　　Use a saw blade or a grinding wheel to carefully scrape the surface wrinkles, and shovel a V-shaped gap at the break of the gel coat; blow off the dust with compressed air, clear with acetone; fill it carefully with a brush dipped in gel coat resin, etc., and make it as flat as possible or slightly higher On the original surface; coat the surface and cover the plastic film; after the resin is completely cured, use sandpaper to sand in the order of fineness.cUtCooling tower noise reduction treatment manufacturer

　　For minor defects or damages, non-reinforced plates can be used to repair, and for larger damages, reinforced plates are used to repair, but in fact a mixed form is adopted. For large cracks and fractures, a combination of resin injection and reinforcement should be used. First clean the cracks with acetone, remove the protruding burrs, air dry, inject the resin glue, and patch the FRP. For the fractured part, the glass fiber reinforced plastic reinforcement plate should also be riveted and reinforced with bolts.cUtCooling tower noise reduction treatment manufacturer

　　2. PuttycUtCooling tower noise reduction treatment manufacturer

　　Putty and cement are indispensable materials in the molding and maintenance of FRP. Putty, also known as cement, is also a kind of cement, and one of the main components of cement is filler. The main purpose of putty is to make filling materials, adhesives, reinforced thermal insulation materials, and decorative materials.cUtCooling tower noise reduction treatment manufacturer

　　Putty, as the main material for FRP repair, includes polyester resin putty, epoxy resin putty and some resin coating putty.cUtCooling tower noise reduction treatment manufacturer

　　(1) Requirements for filling puttycUtCooling tower noise reduction treatment manufacturer

　　1) It has good scratching properties, dry curing properties and sanding properties.cUtCooling tower noise reduction treatment manufacturer

　　2) It has good filling properties and small shrinkage.cUtCooling tower noise reduction treatment manufacturer

　　3) The adhesion to the substrate (the repaired FRP material) is better, and the putty layer should have a certain mechanical strength.cUtCooling tower noise reduction treatment manufacturer

　　4) For repair parts that need to be painted, it is required to have low paint absorption and good adhesion to the painted layer.cUtCooling tower noise reduction treatment manufacturer

　　(2) Putty preparationcUtCooling tower noise reduction treatment manufacturer

　　1) Put the putty that has not been mixed with initiator on a flat plate and add initiator according to the prescribed amount.cUtCooling tower noise reduction treatment manufacturer

　　2) Stir thoroughly with a scraper to make it evenly mixed.cUtCooling tower noise reduction treatment manufacturer

　　3) Because putty is a fast curing material. The amount and operating time should be accurately estimated to avoid excessive mixing and waste.cUtCooling tower noise reduction treatment manufacturer

　　4) The flat plate of the mixed putty can be a veneer, a metal plate or a glass steel plate, and it can be cleaned with acetone or paint thinner.cUtCooling tower noise reduction treatment manufacturer

　　(3) Putty coating and scrapingcUtCooling tower noise reduction treatment manufacturer

　　1) Because the resin putty shrinks after curing, it is necessary to scrape more.cUtCooling tower noise reduction treatment manufacturer

　　2) The scraper should be inclined about 45°.cUtCooling tower noise reduction treatment manufacturer

　　3) Putty should be moderately soft and hard, if it is too hard, it is easy to produce holes, and if it is too soft, it is easy to sag.cUtCooling tower noise reduction treatment manufacturer

　　4) When adding putty when the putty is used up in the middle, the scraper should be pulled from the front slightly.cUtCooling tower noise reduction treatment manufacturer

　　5) Scrape putty on the rounded corners slowly to avoid forming cavities.cUtCooling tower noise reduction treatment manufacturer

　　(4) Sanding puttycUtCooling tower noise reduction treatment manufacturer

　　1) Dry abrasive cloth (paper) should be used after fully removing moisture. Emery cloth (paper) with scattered sand particles should not be used, because this kind of emery cloth (paper) will scratch other parts and make the sanding effect worse.cUtCooling tower noise reduction treatment manufacturer

　　2) Water sandpaper must be polished with water. There should be no obvious heat during sanding.cUtCooling tower noise reduction treatment manufacturer

　　3) Water sheet or rubber should be used as a pad to improve the efficiency and quality of polishing. The rounded corners should be polished with a tube as a pad.cUtCooling tower noise reduction treatment manufacturer

　　4) Be careful when polishing, and observe the finish by using the hand feel and the reflection of light.cUtCooling tower noise reduction treatment manufacturer

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