Glass fiber reinforced plastic water tank crack repairing technology

A glass fiber reinforced plastic and crack technology, applied in the direction of adhesive additives, non-polymer adhesive additives, adhesives, etc., can solve the problem of incapable of repairing cracks, and achieve improved service life, prolong service life, and improve tensile and compressive strength. the effect of strength

Inactive Publication Date: 2015-03-04
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is only applicable to the defects caused by the preparation, processing and installation of FRP products.
It cannot be used to repair cracks after use

Method used

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  • Glass fiber reinforced plastic water tank crack repairing technology
  • Glass fiber reinforced plastic water tank crack repairing technology
  • Glass fiber reinforced plastic water tank crack repairing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Embodiment 1, the crack of FRP water tank occurs at the bottom of the water tank, such as figure 1 As shown, the crack repair process steps are as follows:

[0056] To install a mobile lighting lamp in the water tank, first clean up the remaining water and dirt in the bottom of the FRP water tank. Find the plate a1 where the crack is generated at the bottom of the FRP water tank, and mark it. The crack width is about 0.5mm and the crack depth is 6mm. Use a steel tape to measure the area occupied by the crack a2 with a length of 200 mm and a width of 40 mm, and calculate the area occupied by the crack.

[0057] Grind the cracked part with an angle grinder holding a sand disc. The grinding area must be large enough to include the area occupied by the crack. The calendering layer must be removed until the first layer of glass fiber cloth is exposed. Drill technical holes a4 at the end points of both ends of the crack, the hole diameter is φ4mm, and wipe the polished surf...

Embodiment 2

[0061] Embodiment 2, the crack of FRP water tank occurs in the corner of the water tank, such as figure 2 As shown, the crack repair process steps are as follows:

[0062] Clean up the remaining water and dirt in the FRP water tank, find the plate b1 with cracks at the corner of the FRP water tank, and mark it. The crack width is about 0.5mm and the crack depth is 6mm. Use a steel tape to measure the length of the area occupied by the crack b2 as 90mm and 30mm in width.

[0063] Use an angle grinder to grind the cracked part with a sand disc. The crack appears on one of the glass steel plates. When pasting, the two vertical surfaces need to be pasted at the same time. Grind the pasting surface b3 where the corner crack is located and the adjacent vertical surface. For surface b5, the polished area should be large enough, and the calendered layer should be removed until the first layer of glass fiber cloth is exposed. Drill the process hole b4 at the end of the crack far awa...

Embodiment 3

[0067] Embodiment 3, the crack of FRP water tank is produced on the side, as image 3 , the crack repair process steps are as follows:

[0068] Clean up the remaining water and dirt in the FRP water tank, and find the plate c1 with cracks on the side of the FRP water tank. The crack width is about 0.5mm and the crack depth is 6mm. Use a steel tape to measure the area occupied by the crack c2 with a length of 260 mm and a width of 60 mm, and calculate the area occupied by the crack.

[0069] Grind the inner surface c3 of the cracked FRP sheet with an angle grinder holding a sand disc. The grinding area must be large enough to include the area occupied by the crack. The calendering layer must be removed until the first layer of glass fiber cloth is exposed. until. Drill process holes c4 at both ends of the crack, and wipe the polished surface with a dry cloth.

[0070] Cut one piece of metal filter screen with the same area with iron sheets, and cut 4 pieces of glass fiber cl...

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Abstract

The invention relates to a glass fiber reinforced plastic water tank crack repairing technology. The technology comprises the following steps of polishing inner cracks of a glass fiber reinforced plastic water tank until a first-layer glass fiber cloth is exposed, respectively drilling two technique holes at two ends of the crack, cutting a metal filter screen and glass fiber cloths, uniformly coating the cracks with a prepared resin binder, pasting the first-layer glass fiber cloth, carrying out blade coating with the resin binder, pasting the second-layer glass fiber cloth, carrying out coating with the binder, simultaneously pasting the third-layer glass fiber cloth and the metal filter screen, repeating the above binder coating and pasting processes until the 4th-6th glass fiber cloths are pasted, then carrying out blade coating on the last-layer glass fiber cloth with the resin binder and carrying out curing. The technology has simple processes and a low cost, contains the stainless steel metal filter screen sandwich, improves repaired layer tensile and compressive strength and is free of water tank replacement.

Description

technical field [0001] The invention relates to a process for repairing cracks in a glass fiber reinforced plastic water tank, which belongs to the technical field of metallurgical equipment. Background technique [0002] At present, most of the cooling circulating water tanks used in domestic vacuum furnaces, intermediate frequency furnaces and other small smelting equipment use SMC glass fiber reinforced plastic combined water tanks, which are assembled from overall high-quality SMC glass fiber reinforced plastic molded veneers. SMC molded veneers are made of resin, glass fiber Fiber cloth is made by mechanical pressing under high temperature and high pressure. FRP water tanks are prone to cracks suddenly after long-term use. The main reason is the combined effect of aging of FRP plates and internal stress. After the cracks suddenly occurred, the cooling circulating water leaked rapidly, causing the vacuum furnace, intermediate frequency furnace and other smelting equipmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C73/00B29C73/26C09J167/06C09J11/04C09J11/06
Inventor 毕永谦魏灿珉张继虎董涛赵立霞
Owner SHANDONG IRON & STEEL CO LTD
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