Method for coating cement lining on pipe fitting

Abstract

The present invention discloses a method for coating cement lining on pipe fitting with a firm cement lining structure, which is characterized by comprising the following steps of: 1, preparing materials: sieving river sand and preparing 801 glue; 2, stirring the materials: weighing fine sand, cement and the 801 glue according to the proportion of 2:(1-1.5):(0.1-0.15) by weight, stirring and uniformly mixing to obtain the lining; 3, preparing prime coat: weighing the fine sand, the cement and the 801 glue according to the proportion of 2:(1-1.5):(0.4-0.7) by weight; 4, coating the lining: coating and brushing the prime coat obtained in the step 3 on the inner wall of the pipe fitting, placing the lining obtained in the step 2 on the inner wall subjected to the prime coat brushing, uniformly spreading the lining by using a tool, pressing the lining by using a tool, modifying the lining to be smooth and flat by using a tool; and 5, curing. The method for coating cement lining on pipe fitting with a firm cement lining structure provided by the present invention has simple process and easy holding, improves the lining strength and the product surface quality, shortens the production period, improves the production efficiency and lowers the production cost.

Description

Technical field: [0001] The invention relates to a lining coating method for pipe fittings, in particular to a cement lining coating method for pipe fittings. Background technique: [0002] At present, the lining of pipe fittings generally adopts the wet cement lining process. Cement, sand, water, and coagulant are mixed in proportion, and the lining surface is smoothed when the cement mortar is initially set. The connection is transitioned with a circular arc, and the steam curing is carried out after 3 to 5 hours of initial setting. Due to the high water content, when the lining is applied manually, the water in the mortar cannot be discharged, resulting in pores between the pipe wall and the cement layer that affect the adhesion, and the density of the cement layer is not enough to affect the strength. Invention content: [0003] The purpose of the present invention is to provide a method for coating the cement lining of pipe fittings with firm cement lining structure....

AI Technical Summary

Problems solved by technology

Due to the high water content, when the lining is applied manually, the water in the mortar cannot be discharged, resulting in pores between the pipe wall and the cement layer that affect the adhesion, and at the same time, the density of the cement layer is not enough to affect the strength.