Degradable type shield tail sealing grease of shield excavation machine

Abstract

The invention discloses a degradable type shield tail sealing grease of a shield excavation machine, belonging to the field of chemical grease. The degradable type shield tail sealing grease of the shield excavation machine is prepared by compounding the following raw materials in parts by weight: 16-20 parts of base oil, 10-16 parts of thickening agents, 68-76 parts of filling materials, 3-5 parts of lubricating agents, 0.5-2 parts of antioxidants, 0.3-1.7 parts of antirusting agents, 0.5-1.5 parts of antimildew agents, 5-7 parts of viscosity index modifying agents and 16-24 parts of plasticizing agents. The preparation method of the degradable type shield tail sealing grease comprises the following steps of: firstly adding the base oil, the thickening agents, the viscosity index modifying agents, the antirusting agents, the antimildew agents, lubricating agents and the antioxidants to an agitator according to weight ratio at normal temperature, and uniformly mixing and agitating; then adding the filling materials in batches, and uniformly mixing; finally adding fibers, and mixing and agitating for about 90 minutes. The degradable type shield tail sealing grease not only has property of the conventional shield tail sealing grease and the advantages of low cost, high adhesivity, good pumping effect and excellent sealing property, but also can be degraded by microbes contained in soil without polluting the soil and underground water, belongs to an environmental-friendly product.

Description

[technical field] [0001] The invention relates to a shield tail sealing grease, in particular to a degradable shield tail sealing grease of a shield tunneling machine. [Background technique] [0002] In recent years, my country's subway industry has developed rapidly. So far, more than 40 cities across the country have set off an upsurge in building subways. The construction of the subway mainly adopts the shield tunneling method. Therefore, more and more shield tunneling machines are used in the construction of subways in various cities, so a large amount of shield tail sealing grease is required for the waterproof lubrication of the shield tunneling machine. [0003] Shield tail sealing grease is a kind of sealing material injected into the wire brush shield tail of tunnel shield boring machine in underground engineering shield construction, which mainly plays the role of lubrication, sealing, waterproof and anti-corrosion. When the shield tunneling machine is working, th...

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Problems solved by technology

[0004] At present, there are many types of domestic shield tail oil products, but these products will pollute the environment to varying degrees, because the raw materials for the production of shield tail oil often contain some environmentally harmful materials, such as non-degradable base oils; toxic antioxidants , plasticizers, antirust agents, thickeners, etc., these raw materials will penetrate into the soil and groundwater after construction, pollute the soil and groundwater, and are not conducive to sustainable development

Although imported products do not pollute the environment, they have a problem of high cost. For example, the price of products from Japan's Matsumura Petroleum Company has exceeded 30 yuan / kg, and its consumption is also large.

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