Preparation method of biodegradable water-resistant shield tail sealing grease

A shield tail seal and biodegradable technology, which is applied in lubricating compositions, thickeners, petroleum industry, etc., can solve the problems of low biodegradation rate of shield tail seal grease, improve waterproof effect, improve degradation effect, and enhance sealing The effect of sex and water resistance

Pending Publication Date: 2022-04-19
SHANDONG QINGYISHAN PETROCHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shield tail sealant of this technology has good water resistance, high temperature resistance, excellent sealing performance, and good pumping performance, but the biodegradation rate of the shield tail sealant prepared by this technology is always lower than 95%.

Method used

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  • Preparation method of biodegradable water-resistant shield tail sealing grease

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A biodegradable water-resistant shield tail sealant, mainly composed of the following raw materials in parts by weight: 125 parts of lubricating grease, 28 parts of solid additives, 3 parts of antioxidant, 6 parts of rust inhibitor, 1.75 parts of oily agent, structure 4 parts of stabilizer, 2 parts of multi-effect additive.

[0024] The lubricating grease is mainly composed of base fat, radish seed extract and sala seed extract in a weight ratio of 6:2:1, wherein the base fat is a composite aluminum-based grease; the solid additive is asbestos powder and plant fiber; the solid The particle size range of the additive is 0.5-50 μm, the solid additive with a particle size of 0.5-10 μm accounts for 15% of the total weight of the solid additive, and the solid additive with a particle size of 10-20 μm accounts for 35% of the total weight of the solid additive The solid additive with a particle size of 20-40 μm accounts for 25% of the total weight of the solid additive, and th...

Embodiment 2

[0032] A biodegradable water-resistant shield tail sealant, mainly composed of the following raw materials in parts by weight: 100 parts of lubricating grease, 10 parts of solid additives, 2 parts of antioxidant, 2 parts of antirust agent, 0.5 part of oily agent, structure 2 parts of stabilizer, 1 part of multi-effect additive.

[0033]The lubricating grease is mainly composed of base grease, radish seed extract and sala seed extract in a weight ratio of 5:3:1, wherein the base grease is a composite titanium-based grease. The solid additive is mixed with asbestos powder, calcium carbonate and composite fiber. The particle size range of the solid additive is 0.5-50 μm. Among the solid additives, solid additives with a particle size of 0.5-10 μm account for 10% of the total weight of the solid additives, solid additives with a particle size of 10-20 μm account for 20% of the total weight of the solid additives, and solid additives with a particle size of 20-40 μm It accounts f...

Embodiment 3

[0041] A biodegradable water-resistant shield tail sealant, mainly composed of the following raw materials in parts by weight: 150 parts of lubricating grease, 45 parts of solid additives, 5 parts of antioxidant, 8 parts of antirust agent, 2 parts of oily agent, structure 5 parts of stabilizer, 3 parts of multi-effect additive.

[0042] The lubricating grease is mainly composed of base fat, radish seed extract and sala seed extract in a weight ratio of 7:2:2, wherein the base fat is a mixture of calcium-based fat and sodium-based fat. The solid additive is formed by mixing calcium carbonate and plant fiber. The particle size range of the solid additive is 0.5-50 μm. Among the solid additives, solid additives with a particle size of 0.5-10 μm account for 20% of the total weight of the solid additives, solid additives with a particle size of 10-20 μm account for 40% of the total weight of the solid additives, and solid additives with a particle size of 20-40 μm Accounting for ...

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Abstract

The invention relates to the technical field of sealing grease, in particular to a preparation method of biodegradable water-resistant shield tail sealing grease. The preparation method comprises the following steps: preparing the semen raphani extract, preparing the semen aesculi extract, adding the semen raphani extract, the semen aesculi extract, the antioxidant, the antirust agent, the oiliness agent, the structure stabilizer and the multi-effect additive into the base grease, uniformly stirring, and sequentially adding the solid additive in batches according to the particle size. After the semen raphani in the lubricating grease disclosed by the invention is extracted by the extraction process disclosed by the invention, erucic acid, linoleic acid, linolenic acid and erucyl glyceride contained in the semen raphani can effectively improve the degradation effect of the base oil, and the buckeye extract is added to play a role in thickening, so that the waterproof effect of the lubricating grease is improved; solid additives with different particle size distributions are added into the lubricating grease, so that the sealing property and the water resistance of the lubricating grease are enhanced.

Description

technical field [0001] The invention relates to the technical field of sealing grease, in particular to a preparation method of biodegradable water-resistant shield tail sealing grease. Background technique [0002] The shield boring machine is the preferred excavation tool for excavating urban subway tunnels. Its advantages are not affected by the above-ground buildings and geographical environment. It has a particularly wide range of applications and can fully meet the stringent requirements of urban tunnel construction. The shield tail sealing system is a sealing device designed to prevent the soil layer, sand layer, water layer and slurry around the shield tail from entering the shield machine from the gap between the shield tail and the segments. Shield tail sealing grease is injected into the sealing cavity between the three rows of stainless steel wire brushes in real time from the shield tail through the grease pump and kept dynamically filled to meet the requirement...

Claims

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Application Information

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IPC IPC(8): C10M169/06C10M121/00C10N50/10C10N40/34C10N30/06C10N20/06
CPCC10M169/06C10M121/00C10M2201/102C10M2201/062C10M2207/026C10M2215/06C10M2219/044C10M2219/046C10M2207/125C10M2227/04C10M2229/045C10M2219/068
Inventor 王树贞马磊于洋洋宗磊
Owner SHANDONG QINGYISHAN PETROCHEM TECH CO LTD
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