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Environmental-friendly shield tail seal grease and preparation method thereof

A shield tail sealing and environmental protection technology, which is applied in the petroleum industry, lubricating compositions, etc., can solve the problems of underground environmental pollution of shield tail sealing grease, and achieve the effects of good pumpability, good sealing and lower construction costs.

Active Publication Date: 2018-11-23
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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  • Environmental-friendly shield tail seal 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 into a blender and mix. After stirring for 2 hours, add 8 parts of PMA, 2 parts of HSD and 2 parts of ordinary lithium grease, then mix and stir for 0.5h. During the mixing process, the internal temperature of the mixer is kept at 50℃. Finally, 9 parts of glass fiber and 2 parts of bamboo fiber are added and stirred for 1 hour. After the mixing is completed, the environment-friendly shield tail sealing grease can be obtained by cooling at room temperature. The base oil composition is 25 One 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 talcum powder into the blender and mix. After stirring for 1 hour, add 8 parts of PMA, 3 parts of HSD and 4 parts of ordinary lithium base Grease, mix and stir for 1 hour. During the stirring, the temperature in the mixer is maintained 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 0.5h. After the stirring is finished, cool at room temperature to obtain Environmental protection type shield tail sealing grease; wherein the base oil composition is mixed with 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 talcum powder into the mixer and mix, stir for 1 hour and then add 5 parts of OCP, 1 part of HSD, 3 Parts of ordinary lithium grease and 2 parts of extreme pressure lithium grease, then mix and stir for 0.5h. During the stirring process, the temperature in the mixer is kept at 55℃, and finally 12 parts of asbestos fiber, 10 parts of bamboo fiber and 2 parts of cotton fiber are added Among them, stirring for 1 hour, and cooling at room temperature after the stirring, the environment-friendly shield tail sealing grease can be obtained; wherein the base oil composition is mixed with 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 environmental-friendly shield tail seal grease and a preparation method thereof. The environmental-friendly shield tail seal grease is prepared from combining the following raw materials in parts by weight: 20 to 35 parts of base oil composition, 6 to 15 parts of viscosity index modifier, 30 to 55 parts of waterproof sealing material, 2 to 5 parts of lubricating agent, and 5 to 25 parts of complex fiber, wherein the base oil composition is prepared from mixing isooctyl alcohol modified colleseed oil and soybean oil or biodiesel according to the mass ratio being 1 to 4:1; the complex fiber is prepared from mixing a mineral fiber and a plant fiber according to the mass ratio being 1 to 4.5:1. The base oil composition is prepared from mixing the isooctyl alcohol modified colleseed oil and the soybean oil or the biodiesel, has excellent abrasion resistance and oxidation resistance, and no harm on soil and underground water, can be degraded within a short term in the underground environment, and solves the problem that a shield tail seal grease has severe pollution on the underground environment during the shield process on the basis of ensuring a better sealing performance.

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] Shield machine, namely shield tunnel boring machine, is a construction tool when building tunnels. It can play a role in supporting the pressure of the subterranean soil layer when excavating the ground and assembling the lining. It is accompanied by subways, tunnels, highways, and municipal , In the construction of hydropower tunnel engineering, shield tunneling has become a commonly used construction method, and the shield tail sealing grease is the sealing material injected into the shield tail wire brush of the shield machine, which is mainly used for lubrication, sealing, waterproofing, The anti-corrosion effect has played a good role in improving construction conditions and improving construction safety, quality and work efficiency. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10N50/10C10N40/34C10N30/10
CPCC10M169/044C10N2030/10C10N2040/34C10N2050/10C10N2030/26C10N2030/36C10N2030/64
Inventor 陈钱宝石涛陈雷黄海孙迅黄珊珊闫骐隆郭桓
Owner CHINA TIESIJU CIVIL ENG GRP CO LTD
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