Shield tail sealing grease special for shield machine and preparation method thereof

A shield tail seal and shield machine technology, which is applied in the petroleum industry, lubricating compositions, etc., can solve the problems of poor water pressure resistance sealing performance and pumping performance, increased engineering costs, and high transportation costs, and achieves strong adhesion and improved. Work efficiency, improve the effect of sealing effect

Active Publication Date: 2020-08-18
HUBEI ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the shield tail seal grease used in domestic tunnel construction is mostly imported. Although it has advantages in performance, it is more expensive and the transportation cost is also higher, which greatly increases the project cost.
However, there are relatively few shield tail sealing greases with excellent performance in the domestic market, and most of them have the problems of poor water pressure sealing performance and poor pumpability. Special shield tail seal grease for shield machine with good pumping performance and excellent lubricating performance

Method used

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  • Shield tail sealing grease special for shield machine and preparation method thereof
  • Shield tail sealing grease special for shield machine and preparation method thereof
  • Shield tail sealing grease special for shield machine and preparation method thereof

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preparation example Construction

[0025] In addition, the embodiment of the present invention also provides a preparation method of special shield tail sealing grease for shield machines, which includes: stirring the base oil, calcium carbonate and bentonite evenly, adding polyisobutylene, ethylene-propylene copolymer, and lubricating grease and heating to Stir and mix evenly at 50-70°C, then add plant fiber and synthetic fiber, stir and mix evenly at 50-70°C, then cool to room temperature while stirring. The method is simple and easy to operate. Through the reasonable selection and proportioning of raw material components and the above mixing, the special shield tail sealing grease provided by the embodiment of the invention can be prepared.

[0026]It is worth noting that in this method, the order of adding the components is to first mix the base oil, calcium carbonate and bentonite at room temperature, then add polyisobutylene, ethylene-propylene copolymer, grease, and heat to 50~ 70°C to make the semi-soli...

Embodiment 1

[0029] A special shield tail sealing grease for a shield machine, its components and the proportions by weight are as follows:

[0030]

[0031]

[0032] The preparation process is as follows: First, mix 80kg No. 32 mechanical oil, 550kg 600-mesh calcium carbonate and 100kg calcium-based bentonite in a mixing mixer at room temperature, then add 150kg polyisobutylene with a number average molecular weight of 2400, 30kg ethylene-propylene copolymer T612A, 40kg3 No. Lithium-based grease is heated to 60°C and stirred evenly, and finally 50kg of wood fibers with an average length of 2mm and 20kg (average length of 3mm, average diameter of 20 microns) of polyester fibers are added at 60°C and stirred evenly, then cooled while stirring To normal temperature, a kind of shield tail sealing grease specially used for shield machine can be obtained.

Embodiment 2

[0034] A special shield tail sealing grease for a shield machine, its components and their weight proportions are as follows:

[0035]

[0036]

[0037] The preparation process is as follows: first, mix 120kg No. 46 mechanical oil, 650kg 400-mesh calcium carbonate and 120kg sodium-based bentonite in a mixing mixer at room temperature, then add 200kg polyisobutylene with a number average molecular weight of 1000, 20kg ethylene-propylene copolymer T612, 5kg Heat No. 2 lithium-based lubricating grease to 50°C and mix evenly. Finally, add 25kg of cotton fibers with an average length of 1mm and 5kg of nylon fibers (average length of 5mm, average diameter of 10 microns) and stir at 50°C. Cool to normal temperature to get a kind of special shield tail sealing grease for shield machine.

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Abstract

The invention relates to the field of lubricating oil compositions and provides a shield tail seal grease special for a shield tunneling machine. The shield tail seal grease is prepared from, by weight, 60-120 parts of base oil, 100-200 parts of polyisobutylene, 20-50 parts of ethylene propylene copolymer, 20-50 parts of lubricating grease, 300-650 parts of calcium carbonate, 100-200 parts of bentonite, 25-50 parts of plant fiber and 5-50 synthetic fiber. In addition, the invention also provides a preparation method of the shield tail seal grease special for the shield tunneling machine. The preparation method comprises the steps that the base oil, the calcium carbonate and the bentonite are stirred evenly, the polyisobutylene, the ethylene propylene copolymer and the lubricating grease are added and heated to 50-70 DEG C and are stirred and mixed evenly, then the plant fiber and the synthetic fiber are added and are evenly stirred and mixed at the temperature of 50-70 DEG C, cooling is performed to reach room temperature during stirring, and the shield tail seal grease is obtained. The shield tail seal grease special for the shield tunneling machine has excellent water pressure resisting airtightness and has pumping performance and lubricating property in a wide temperature range.

Description

technical field [0001] The invention belongs to the field of lubricating grease compositions, and in particular relates to a special shield tail sealing grease for a shield tunneling machine and a preparation method thereof. Background technique [0002] In order to adapt to the development of urban construction, the construction of underground projects, especially urban rail transit tunnels, is increasing day by day. The shield machine (full name is the shield tunnel excavator) is a special tunneling engineering machine that excavates weak ground and makes holes in underground and mountain engineering construction, and is widely used in tunnel excavation projects. During the propulsion process of the shield machine, due to the friction between the shield tail and the pipe wall, it will affect the propulsion of the shield machine and damage the shield tail device, and the infiltration of mud in the soil layer will also affect the normal operation of the shield machine and in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/04C10N30/06
CPCC10M169/048C10M2201/062C10M2201/103C10M2205/022C10M2205/024C10M2205/026C10N2010/04C10N2030/06C10N2040/34
Inventor 文胜龚春丽刘海郑根稳覃彩芹汪连生李伟
Owner HUBEI ENG UNIV
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