Manufacturing method of FRP integrated septic tank storage tank

Abstract

The invention provides a manufacturing method of a glass fiber-reinforced plastic integrated septic tank storage pot. The manufacturing method is characterized in that a vacuum membrane (7), and the inner walls of a middle cylinder mold (1) and an end socket mold (2) both for the septic tank storage pot are combined to form an airtight cavity (9) isolated from outside air, the airtight cavity (9) is provided with a plurality of resin injection pipelines (91) located at different horizontal heights and a plurality of vacuum supply pipelines (92) located at the highest position, the airtight cavity (9) is kept in vacuum through air exhaust, resin is absorbed into the airtight cavity (9) through the resin injection pipelines (91), and then a glass fiber-reinforced plastic cylinder (10) and an end socket (20) are formed after solidification. After the auxiliary structure of the storage pot is fabricated completely, the cylinder (10) and the end socket (20) are assembled into the integrated glass fiber-reinforced plastic septic tank storage pot. The manufacturing method provided by the invention is capable of producing the glass fiber-reinforced plastic storage pot which is higher in compactness, higher in strength and more stable in quality, and the process of the manufacturing method is clean and has environment-friendly effect. Provided that the cylinder mold of a corrugated concave-convex structure (11) is adopted, a support in the cylinder can be further omitted, and consequently, the compressive strength and bending strength of the cylinder can be improved.

Description

technical field [0001] The invention relates to a method for manufacturing a storage tank, in particular to a method for manufacturing a fiberglass integrated septic tank. Background technique [0002] Septic tank is an indispensable drainage treatment equipment in the construction field. It is used to discharge domestic wastewater into municipal pipelines after primary treatment or into lower-level sewage treatment facilities for advanced treatment. Most of them are buried. Bricks, reinforced concrete or steel plates were usually used to manufacture septic tanks in the early days, but they all had obvious defects. In recent years, FRP integrated septic tanks have gradually been selected by most construction units. The scientific name of FRP is glass fiber reinforced plastic, and the septic tank storage tank made of FRP has the characteristics of strong corrosion resistance, no leakage, easy construction, and slow aging speed. The service life can reach more than 50 years. ...

AI Technical Summary

Problems solved by technology

Among them, the manual pasting method is the most backward, with low labor efficiency, high labor intensity, unstable product quality, and difficult to control; mechanical winding and winding pipe assembly mechanical winding methods are similar, using a winding machine to wind the inner liner as a whole or separately. After the components are connected manually, although the degree of mechanization is higher than that of manual pasting, the product quality is relatively uniform, but the requirements for equipment are high, it is difficult to reduce costs, and the consistency of manual connection and assembly is poor, which is prone to quality problems

At the same time, the above three manufacturing methods all face the problem of insufficient compression and bending resistance of the buried storage tank under the condition of limited thickness of the tank wall. The tanks manufactured by the above methods all need to add internal supports in the tank In order to improve the structural strength, but it also brings problems such as cumbersome manufacturing process, inconvenient operation, difficult matching of supporting materials and sizes, and local stress concentration at the supporting points in the tank.

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