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A kind of environment-friendly shield tail sealing grease and preparation method thereof

A shield tail seal and environment-friendly technology, applied in the petroleum industry, lubricating compositions, etc., can solve the problems of shield tail seal grease underground environmental pollution, etc., achieve good pumpability, good sealing performance, and reduce construction costs

Active Publication Date: 2021-07-30
CHINA TIESIJU CIVIL ENG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of existing domestic products and provide an environmentally friendly shield tail sealing grease for shield machines, which has good environmental protection and biodegradability, strong oxidation resistance, and good fluidity under low temperature conditions. Excellent pumping performance and waterproof sealing performance, the overall performance has been greatly improved, and it solves the problem of serious pollution of the shield tail seal grease to the underground environment during the shield tunneling process. It is an environmentally friendly product that can effectively improve construction efficiency.

Method used

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  • A kind of environment-friendly shield tail sealing grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 35 parts of base oil composition, 23 parts of light calcium carbonate and 19 parts of bentonite and add them to the mixer for mixing. After stirring for 2 hours, add 8 parts of PMA, 2 parts of HSD and 2 parts of ordinary lithium-based grease, and then mix and stir for 0.5 hours. During the stirring process, the temperature in the mixer was kept at 50°C. Finally, 9 parts of glass fiber and 2 parts of bamboo fiber were added to it and stirred for 1 hour. 1 part isooctyl alcohol modified rapeseed oil mixed with 10 parts soybean oil.

Embodiment 2

[0022] Weigh 25 parts of base oil composition, 20 parts of light calcium carbonate, 20 parts of bentonite, 10 parts of graphite and 5 parts of talc powder and add them to the mixer for mixing. After stirring for 1 hour, add 8 parts of PMA, 3 parts of HSD and 4 parts of ordinary lithium Grease, mix and stir for 1 hour. During the stirring process, the temperature in the mixer is kept at 45°C. Finally, 3 parts of glass fiber, 1 part of bamboo fiber and 1 part of cotton fiber are added to it and stirred for 0.5 hours. After the stirring is completed, it is cooled at room temperature to obtain Environmentally friendly shield tail seal grease; the base oil composition is a mixture of 20 parts of isooctyl alcohol modified rapeseed oil and 5 parts of biodiesel.

Embodiment 3

[0024] Weigh 35 parts of base oil composition, 15 parts of light calcium carbonate, 5 parts of silicon dioxide, 5 parts of calcium hydroxide and 5 parts of talc powder and add them to the mixer for mixing. After stirring for 1 hour, add 5 parts of OCP, 1 part of HSD, 3 parts of 1 part of ordinary lithium-based grease and 2 parts of extreme-pressure lithium-based grease, and then mixed and stirred for 0.5 hours. Stir for 1 hour, and cool at room temperature after stirring to obtain an environmentally friendly shield tail seal grease; the base oil composition is prepared by mixing 17.5 parts of isooctyl alcohol-modified rapeseed oil and 17.5 parts of soybean oil.

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Abstract

The invention provides an environment-friendly shield tail sealing grease and a preparation method thereof. The environment-friendly shield tail sealing grease is composed of the following raw materials in parts by weight: 20-35 parts of base oil composition, viscosity index modifier 6-15 parts, 30-55 parts of waterproof sealing material, 2-5 parts of lubricant, 5-25 parts of composite fiber, the base oil composition is isooctyl alcohol modified rapeseed oil and soybean oil or biodiesel by mass The composite fiber is formed by mixing mineral fiber and plant fiber at a mass ratio of 1-4.5:1. The base oil composition used in the present invention is a mixture of isooctyl alcohol modified rapeseed oil and soybean oil or biodiesel, which has excellent anti-wear performance and oxidation resistance, and is not harmful to soil and groundwater. It can be degraded in a short to medium term. On the basis of ensuring good sealing performance, it solves the problem of serious pollution of the shield tail sealing grease to the underground environment during the shield tunneling process.

Description

technical field [0001] The invention belongs to the field of sealing materials for shield tunneling machines, in particular to an environment-friendly shield tail sealing grease and a preparation method thereof. Background technique [0002] The shield machine is the shield tunnel boring machine. It is a construction tool for tunnel construction. It can support the pressure of the subsurface soil when excavating the strata and assembling the lining. Along with subways, tunnels, highways, municipal In the construction of hydropower tunnel projects, shield excavation has become a commonly used construction method, and the shield tail sealing grease is the sealing material injected at the shield tail wire brush of the shield machine, which mainly plays the role of lubrication, sealing, waterproof, The anti-corrosion effect has played a good role in improving construction conditions, improving construction safety, quality and work efficiency. [0003] At present, there are many...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/04C10N50/10C10N40/34C10N30/10
CPCC10M169/044C10N2030/10C10N2040/34C10N2050/10C10N2030/26C10N2030/36C10N2030/64
Inventor 范冬冬张有为赵杰闫骐隆石涛孙迅黄海王世杰陈进李建波黄珊珊郭桓陈钱宝陈雷
Owner CHINA TIESIJU CIVIL ENG GRP CO LTD
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