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Shield tail sealing grease

A technology of shield tail sealing and grease, which is applied in the engineering field, can solve the problems of unsatisfactory sealing and water resistance, reduce the pumping performance of the product, and wear of the grease pump, so as to meet the requirements of shield construction, high pumping and adhesion The effect of sealing performance and stable storage performance

Inactive Publication Date: 2017-11-24
DALIAN RES & DESIGN INST OF CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the pumpability of domestic oil is low, and the sealing and water resistance cannot meet the construction requirements in an environment with abundant groundwater and high pressure; at the same time, large-sized sheets such as mica sheets are used as leak-proof materials in China, and long-term use will cause damage. The grease pump produces wear and tear and reduces the pumping performance of the product. In view of this, the present invention is proposed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 28kg of base oil, 0.5kg of lubricant and 2kg of adhesion promoter into the kneader, mix and heat to 50°C-80°C, stir to make it evenly mixed, then add 19kg of tackifier and 12kg of cotton fiber in sequence and 40kg of powder filler, evacuated, heat-preserved and stirred for 80 minutes, cooled to room temperature to obtain fibrous paste shield tail sealing grease.

[0024] The base oil is 150SN mineral oil. The lubricant is an aluminum-based complex grease. The adhesion promoter is a mixture of 2-aminoethylethyleneurea and β-(3'4-oxiranyl)ethyltrimethylsilane in a weight ratio of 1:2. The tackifier is a mixture of EPDM rubber T613 and polyisobutylene PB2400 with a mass ratio of 1:1. The powder filler is a calcium carbonate mixture of 2000 mesh, 1250 mesh, 800 mesh and 200 mesh at a mass ratio of 5:1.5:1.5:2. Cotton fiber is a mixture of lengths <1mm, 1-3mm and 3-8mm in a mass ratio of 3:5:2.

Embodiment 2

[0026] Add 30kg of base oil, 0.8kg of lubricant and 3kg of adhesion promoter into the kneader, mix and heat to 50°C-80°C, stir to make it evenly mixed, then add 22kg of tackifier and 10kg of cotton fiber in sequence and 35kg of powder filler, vacuumize and heat-preserve and stir for 80 minutes, and cool to room temperature to obtain fiber paste shield tail sealing grease.

[0027] The base oil is 150SN mineral oil. The lubricant is an aluminum-based complex grease. The adhesion promoter is a mixture of 2-aminoethylethyleneurea and β-(3'4-oxiranyl)ethyltrimethylsilane in a weight ratio of 1:2. The tackifier is a mixture of EPDM rubber T613 and polyisobutylene PB2400 with a mass ratio of 1:1. The powder filler is a calcium carbonate mixture of 2000 mesh, 1250 mesh, 800 mesh and 200 mesh in a mass ratio of 4:2:2:2. Cotton fiber is a mixture of lengths <1mm, 1-3mm and 3-8mm in a mass ratio of 4:4:2.

Embodiment 3

[0029] Add 25kg of base oil, 0.5kg of lubricant and 2kg of adhesion promoter into the kneader, mix and heat to 50°C-80°C, stir to make it evenly mixed, then add 25kg of tackifier and 14kg of cotton fiber in sequence and 33kg of powder filler, evacuated, heat-preserved and stirred for 80 minutes, cooled to room temperature to obtain fibrous paste shield tail sealing grease.

[0030] The base oil is 150SN mineral oil. The lubricant is an aluminum-based complex grease. The adhesion promoter is a mixture of 2-aminoethylethyleneurea and β-(3'4-oxiranyl)ethyltrimethylsilane in a weight ratio of 1:2. The tackifier is a mixture of EPDM rubber T613 and polyisobutylene PB2400 in a mass ratio of 1:2. The powder filler is a calcium carbonate mixture of 2000 mesh, 1250 mesh, 800 mesh and 200 mesh at a mass ratio of 4.5:1.5:1.5:2.5. Cotton fiber is a mixture of lengths <1mm, 1-3mm and 3-8mm in a mass ratio of 3:4:3.

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PUM

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Abstract

The invention discloses shield tail sealing grease, which is characterized by being prepared from the following ingredients in percentage by weight: 25 to 30 percent of basic oil, 0.5 to 1.5 percent of lubricating agents, 15 to 20 percent of thickening agents, 10 to 18 percent of fiber, 0.5 to 3 percent of adhesion promoters and the balance of powder filling materials. Compared with other similar products, the product of the shield tail sealing grease has the advantages that the product does not use flaky substances with large size as a leakage blocking agent; the adhesion promoters are added; the fiber length and the powdery particle size are reasonably proportioned; on one hand, the abrasion of large-size flaky substances on a sealing grease pump can be avoided; good pumping performance is maintained; on the other hand, a compact sealing layer can be formed during the high-pressure resistant sealing; excellent sealing performance is shown; the construction and use requirements of a shield tunneling machine under the conditions of high pressure and rich water content can be met.

Description

technical field [0001] The invention belongs to the technical field of engineering, and in particular relates to a shield tail sealing grease for a shield machine. Background technique [0002] At present, with the massive construction of underground projects such as subways and tunnels and the wide application of shield construction, shield tail sealing grease is one of the main supporting materials for the shield tail of shield tunneling machines in tunnels constructed by shield method, and has a broad market prospect. [0003] The lubricating and sealing function of the shield tail sealing grease can effectively protect the shield tail and isolate the mud, prevent the infiltration of muddy water and grout, and ensure the smooth advancement of the shield. At present, the pumpability of domestic oil is low, and the sealing and water resistance cannot meet the construction requirements in an environment with abundant groundwater and high pressure; at the same time, large-siz...

Claims

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Application Information

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IPC IPC(8): C10M169/00C10M169/06C10N50/10C10N40/34C10N30/12
CPCC10M169/00C10M169/06C10M2201/062C10M2201/084C10M2203/1006C10M2205/022C10M2205/024C10M2205/026C10M2209/082C10M2209/12C10M2215/08C10M2227/04C10N2030/12C10N2030/26C10N2030/36C10N2030/64C10N2040/34C10N2050/10C10N2020/063C10N2010/04
Inventor 张先付韩建国赵汝鸣高玉荣闻和咏宋洪雁
Owner DALIAN RES & DESIGN INST OF CHEM IND