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Shield tail sealing grease as well as preparation method and application thereof

A shield tail seal and grease technology, applied in the field of seal grease, can solve the problems of high price and high use cost

Active Publication Date: 2020-06-09
上海果石实业(集团)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the commercially available shield tail sealing grease has excellent water pressure resistance, pumpability, and lubricity, it is expensive and expensive to use due to the variety of grease in the components.

Method used

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  • Shield tail sealing grease as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The present invention also provides the preparation method of described shield tail sealing grease, comprising the following steps:

[0031] Anhydrous calcium-based lubricating grease, asbestos fiber, calcium carbonate, high molecular polymer, petroleum resin and antirust agent are mixed to obtain the shield tail sealing grease.

[0032] In the present invention, the mixing preferably includes the following steps:

[0033] performing the first mixing of the anhydrous calcium-based grease, high molecular polymer and petroleum resin to obtain a first mixture;

[0034] The first mixture and calcium carbonate are mixed for a second time to obtain a second mixture;

[0035] The second mixture, the asbestos fiber and the antirust agent are mixed for the third time to obtain the shield tail sealing grease.

[0036] In the present invention, the anhydrous calcium-based lubricating grease, high molecular polymer and petroleum resin are first mixed to obtain the first mixture. ...

Embodiment 1

[0045] At 25°C, 25g of anhydrous calcium-based grease, 2g of polyisobutylene and 1g of 120 petroleum resin were mechanically stirred and kneaded (the stirring speed was 30rpm, and the stirring time was 1h) to obtain the first mixture;

[0046] At 30° C., the first mixture and 35 g of calcium carbonate (1100 mesh) were mechanically stirred and mixed (the stirring speed was 30 rpm, and the stirring time was 1 h) to obtain the second mixture;

[0047] At 50° C., the first mixture, 35 g of asbestos fibers (2 mm), and 2 g of barium petroleum sulfonate were mechanically stirred and mixed (the stirring speed was 30 rpm, and the stirring time was 2 h) to obtain shield tail seal grease.

Embodiment 2

[0049] At 50° C., 30 g of anhydrous calcium-based grease, 3 g of polyisobutylene and 2 g of 120 petroleum resin were mechanically stirred and kneaded (the stirring speed was 30 rpm, and the stirring time was 1 h) to obtain the first mixture;

[0050] At 30°C, the first mixture and 32g of calcium carbonate (1100 mesh) were mechanically stirred and mixed (the stirring speed was 30rpm, and the stirring time was 1h) to obtain the second mixture;

[0051] At 35° C., the second mixture, 30 g of asbestos fibers (1.5 mm) and 2 g of barium petroleum sulfonate were mechanically stirred and mixed (stirring speed was 40 rpm, stirring time was 2 h) to obtain shield tail seal grease.

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Abstract

The invention relates to the technical field of sealing grease, and provides shield tail sealing grease, which comprises the following components in parts by mass: 20-50 parts of anhydrous calcium-based lubricating grease, 20-40 parts of asbestos fiber, 20-40 parts of calcium carbonate, 1-3 parts of high-molecular polymer, 1-6 parts of petroleum resin and 2-3 parts of an antirust agent. The shieldtail sealing grease provided by the invention comprises anhydrous calcium-based lubricating grease, asbestos fiber, calcium carbonate, a high-molecular polymer, petroleum resin and the antirust agent, and the performance test of the shield tail sealing grease proves that the shield tail sealing grease product provided by the invention has good water pressure sealing resistance, pumpability and lubricity.

Description

technical field [0001] The invention relates to the technical field of sealing grease, in particular to shield tail sealing grease and its preparation method and application. Background technique [0002] At present, my country's underground transportation is developing rapidly. In order to be able to build underground projects without affecting the existing ground buildings, the construction methods commonly used at present are the shield method or the pipe jacking method. The shield machine is a construction machine tool for tunnel construction, it can play the role of support when excavating the ground and assembling the lining. [0003] When the shield machine is excavating, there is relative sliding friction between the shield tail and the installed segment. In order to prevent external groundwater and mud from pouring into the shield head, a shield tail sealing device must be installed between the shield tail and the installed segment. The tail sealing grease is one o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M177/00C09K3/10C10N10/04C10N40/34C10N30/06C10N30/10C10N50/10
CPCC10M169/044C10M177/00C09K3/1006C10M2201/102C10M2201/062C10M2205/022C10M2205/024C10M2205/026C10M2205/10C10M2205/028C10M2207/16C10M2219/044C09K2003/1087
Inventor 刘慎峰徐飞
Owner 上海果石实业(集团)有限公司
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