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High-temperature-resistant shield tail sealing grease and preparation method thereof

A shield tail sealing and high temperature resistant technology, applied in the engineering field, can solve problems such as safety production accidents, increase construction costs, affect construction period, etc., and achieve the effects of good water pressure resistance, high pumpability, and good peristalsis.

Pending Publication Date: 2021-07-09
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

During shield excavation, if the operating temperature of the shield is high, the grease cannot guarantee good lubrication and sealing performance, so the problem can only be solved by increasing the pumping of grease, stopping the machine to cool down, slowing down the grouting and other measures. The implementation will affect the construction period, increase the construction cost, and in serious cases, safety production accidents will occur, so it is imperative to research and develop high temperature resistant shield tail sealing grease

Method used

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  • High-temperature-resistant shield tail sealing grease and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] The mass fraction is 12% base oil, 8% high temperature stabilizer, 22% tackifier, 1% emulsifier, 0.5% preservative, 2.5% water absorbing material, 50% powder filler, 4% The structure forming agent is kneaded uniformly.

[0010] The base oil is 150SN mineral oil; the high temperature stabilizer is polyurea grease; the tackifier is a mixture of polyisobutylene and hydrogenated styrene diene copolymer in a mass ratio of 1:1; the emulsifier is sorbitan monooleate ; The preservative is sodium benzoate; the water-absorbing material is sodium bentonite; the powdery filler is barite; the structural forming agent is cotton fiber, and the length is 0.5-3.5mm.

Embodiment 2

[0012] The mass fraction is 14% base oil, 5% high temperature stabilizer, 21.5% tackifier, 1.5% emulsifier, 0.5% preservative, 3% water absorbing material, 50% powder filler, 4.5% The structure forming agent is kneaded uniformly.

[0013] The base oil is No. 68 naphthenic oil, the high temperature stabilizer is polyurea grease, the tackifier is polyisobutylene; the emulsifier is sorbitan dioleate; the preservative is tert-butyl-p-hydroxyanisole; The water-absorbing material is sodium bentonite; the powdery filler is calcium carbonate; the structural forming agent is cotton fiber, and the length is 0.5-3.5mm.

Embodiment 3

[0015] The mass fraction is 15% base oil, 10% high temperature stabilizer, 15.5% tackifier, 1% emulsifier, 1% preservative, 3.5% water absorbing material, 50% powder filler, 4% The structure forming agent is kneaded uniformly.

[0016] The base oil is 400SN mineral oil; the high temperature stabilizer is polyurea grease; the tackifier is a mixture of polyisobutylene and ethylene propylene copolymer in a mass ratio of 1:2; the emulsifier is sorbitan monooleate; preservative It is tert-butyl-p-hydroxyanisole; the water-absorbing material is polyacrylamide; the powdery filler is calcium carbonate and barite in a mass ratio of 5:1; the structural molding agent is bamboo fiber, with a length of 0.5-3.5mm.

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Abstract

The invention discloses high-temperature-resistant shield tail sealing grease and a preparation method thereof. The problem that shield tail sealing grease is used at high temperature in the tunneling process of a shield tunneling machine is mainly solved, and the principle is that a high-temperature stabilizer is added into the shield tail sealing grease, and the shield tail grease can still keep the original stable state in the high-temperature construction process of the shield tunneling machine. The high-temperature-resistant shield tail sealing grease is prepared by uniformly kneading the following components in percentage by mass: 5%-20% of base oil, 4%-10% of a high-temperature stabilizer, 8%-35% of a tackifier, 1%-3% of an emulsifier, 0.5%-1% of a preservative, 2%-5% of a water absorbing material, 35%-55% of a powdery filler and 3.5%-5.5% of a structure forming agent. The prepared high-temperature-resistant shield tail sealing grease is high in adhesivity, high in pumpability and good in water-pressure-resistant sealing performance, and the shield tail sealing grease can still play a good sealing and lubricating role in the high-temperature tunneling process of a shield tunneling machine.

Description

technical field [0001] The invention belongs to the technical field of engineering, and in particular relates to a high temperature resistant shield tail sealing grease for shield machines. Background technique [0002] In recent years, major cities have actively developed underground rail transit in order to alleviate and improve the traffic tension. As of December 31, 2020, a total of 45 cities in mainland China have opened subways with a length of 6,302.79 km. The new round of urban rail transit construction planning or construction planning adjustment plan approved by the National Development and Reform Commission involves a total of 4,001.74 km of new planned line lengths and a total of 2,978.191 billion new planned investment. In the process of rail transit construction, the shield method is widely used. In the process of shield construction, the shield tail sealing grease is used in the tail sealing device of the shield tunneling machine, which plays the roles of lub...

Claims

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Application Information

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IPC IPC(8): C10M169/00C10N40/34C10N50/10C10N30/02
CPCC10M169/00C10M2217/0456C10M2205/026C10M2205/04C10M2207/283C10M2207/141C10M2209/12C10M2201/103C10M2201/084C10M2201/062C10M2207/046C10M2205/022C10M2205/024C10M2203/1065C10M2217/044
Inventor 赵汝鸣韩建国高玉荣闻和咏张宾红张春文康铁兵
Owner DALIAN RES & DESIGN INST OF CHEM IND
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