CN112500908A - Environment-friendly shield tail sealing grease and preparation method and application thereof - Google Patents
Environment-friendly shield tail sealing grease and preparation method and application thereof Download PDFInfo
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- CN112500908A CN112500908A CN202011549144.4A CN202011549144A CN112500908A CN 112500908 A CN112500908 A CN 112500908A CN 202011549144 A CN202011549144 A CN 202011549144A CN 112500908 A CN112500908 A CN 112500908A
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- 238000007789 sealing Methods 0.000 title claims abstract description 76
- 239000004519 grease Substances 0.000 title claims abstract description 69
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000000835 fiber Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000002199 base oil Substances 0.000 claims abstract description 14
- 239000000654 additive Substances 0.000 claims abstract description 11
- 230000000996 additive effect Effects 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims abstract description 11
- 235000019484 Rapeseed oil Nutrition 0.000 claims abstract description 6
- 235000012424 soybean oil Nutrition 0.000 claims abstract description 6
- 239000003549 soybean oil Substances 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 79
- 230000007613 environmental effect Effects 0.000 claims description 13
- 238000006065 biodegradation reaction Methods 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000012209 synthetic fiber Substances 0.000 claims description 10
- 229920002994 synthetic fiber Polymers 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 9
- 238000011056 performance test Methods 0.000 claims description 8
- 241000251468 Actinopterygii Species 0.000 claims description 7
- 239000004743 Polypropylene Substances 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 229920000180 alkyd Polymers 0.000 claims description 7
- 239000000440 bentonite Substances 0.000 claims description 7
- 229910000278 bentonite Inorganic materials 0.000 claims description 7
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical group O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 7
- -1 polypropylene Polymers 0.000 claims description 7
- 229920001155 polypropylene Polymers 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 241000238578 Daphnia Species 0.000 claims description 6
- 229920002367 Polyisobutene Polymers 0.000 claims description 6
- 238000009395 breeding Methods 0.000 claims description 6
- 230000001488 breeding effect Effects 0.000 claims description 6
- 229920005610 lignin Polymers 0.000 claims description 6
- 239000010445 mica Substances 0.000 claims description 6
- 229910052618 mica group Inorganic materials 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 231100001251 short-term toxicity Toxicity 0.000 claims description 6
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims description 5
- 241000361919 Metaphire sieboldi Species 0.000 claims description 5
- 230000035515 penetration Effects 0.000 claims description 5
- 230000015556 catabolic process Effects 0.000 claims description 4
- 238000006731 degradation reaction Methods 0.000 claims description 4
- 231100000215 acute (single dose) toxicity testing Toxicity 0.000 claims description 3
- 231100000403 acute toxicity Toxicity 0.000 claims description 3
- 230000007059 acute toxicity Effects 0.000 claims description 3
- 238000011047 acute toxicity test Methods 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
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- 239000002689 soil Substances 0.000 abstract description 8
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- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 231100000419 toxicity Toxicity 0.000 description 3
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- 241000283898 Ovis Species 0.000 description 2
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- 239000000463 material Substances 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
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- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 241001233061 earthworms Species 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
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- 230000005641 tunneling Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
- C10M2201/0626—Oxides; Hydroxides; Carbonates or bicarbonates used as thickening agents
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/10—Compounds containing silicon
- C10M2201/102—Silicates
- C10M2201/103—Clays; Mica; Zeolites
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/10—Compounds containing silicon
- C10M2201/102—Silicates
- C10M2201/103—Clays; Mica; Zeolites
- C10M2201/1036—Clays; Mica; Zeolites used as thickening agents
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/022—Ethene
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/024—Propene
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/026—Butene
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/40—Fatty vegetable or animal oils
- C10M2207/401—Fatty vegetable or animal oils used as base material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/102—Polyesters
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- Engineering & Computer Science (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention belongs to the technical field of shield tail sealing grease, and particularly relates to environment-friendly shield tail sealing grease and a preparation method and application thereof. The environment-friendly shield tail sealing grease disclosed by the invention comprises the following raw materials, by weight, 10-30 parts of base oil, 10-25 parts of tackifier, 2-5 parts of additive, 2-4 parts of fiber and 35-55 parts of solid powder, wherein the base oil comprises one or more of adeps bovis seu Bubali, soybean oil and rapeseed oil, so that the sealing grease has excellent biodegradability, avoids pollution to urban underground water and soil, is safe and environment-friendly, can meet the requirement index of a client on the environment friendliness of the shield tail sealing grease, radically solves the client demand, and generates very large market influence and economic benefit.
Description
Technical Field
The invention belongs to the technical field of shield tail sealing grease, and particularly relates to environment-friendly shield tail sealing grease and a preparation method and application thereof.
Background
Since this century, China has vigorously developed national infrastructure projects, such as tunnels for subways, highways, railways, municipal water and sewage pipelines, hydroelectric power, and river and lake crossing, and a shield method is widely adopted in these constructions. In the shield method, in the tunneling process of a shield machine, because a gap exists between a shield shell and the outer wall of a duct piece, in order to prevent water, silt and the like outside the shield shell from entering the shield, the gap between a shield tail and the duct piece must be sealed. The sealing shield tail brush has friction with the duct piece, the shield tail device is easy to damage due to overlarge friction force, and sealing grease needs to be filled between the shield tail sealing brushes so as to reduce the friction force between the duct piece and the shield tail brush. The shield tail sealing grease is one of the most indispensable materials for shield tail sealing in shield construction.
However, in the use of the shield tail sealing grease, the grease can contact underground water and soil, and the leaked part can exist underground for a long time. With the improvement of the national environmental protection requirement, the national green and environmental protection requirements on biodegradability of the shield tail sealing grease, toxicity to fishes and planktons in water, toxicity to residues in soil and the like are also increasingly improved, for example, the Suzhou municipal department specially studies whether the shield tail grease used in the construction of the subway tunnel shield method reaches the standard in national standard detection indexes such as GB/T21809-2008 earthworm acute toxicity, GB/T21828-2008 daphnia 21-day breeding test, GB/T21807-2008 short-term toxicity test at the fish embryo-yolk sac absorption stage, GB/T21801-2008 fast biodegradation, GB/T21818-2008 inherent biodegradation and the like, and the grease produced by each grease brand in China is processed by mineral raw materials and can not be degraded once entering the nature, and has certain toxicity to soil and water, so the shield tail sealing grease which can meet the normal construction use and meet the detection requirements of environmental protection and the like on the ecological environment is urgently needed in the shield construction engineering at present and even in the future.
Disclosure of Invention
The invention provides an environment-friendly shield tail sealing grease and a preparation method and application thereof, aiming at solving the problems that the existing shield tail sealing grease is not biodegradable and is easy to generate harm to the ecological environment and the like.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the environment-friendly shield tail sealing grease is composed of the following raw materials, by weight, 10-30 parts of base oil, 10-25 parts of a tackifier, 2-5 parts of an additive, 2-4 parts of fibers and 35-55 parts of solid powder, wherein the base oil comprises one or more of adeps bovis seu Bubali, adeps caprae seu ovis, soybean oil and rapeseed oil.
Further, the tackifier comprises one or more of polyisobutylene, alkyd resin and ethylene propylene rubber.
Further, the additive is bentonite.
Further, the fibers are synthetic fibers comprising one or more of lignin, polypropylene fibers, PLA fibers.
Furthermore, the mass ratio of the lignin, the polypropylene fiber and the PLA fiber is 1:1.5-2.0: 2.0-3.0.
Further, the solid powder comprises one or more of anhydrous calcium carbonate and mica powder.
A preparation method of environment-friendly shield tail sealing grease comprises the following steps:
s1: adding the base oil into a stirring kettle, stirring, and heating to 40-60 ℃;
s2: slowly adding the additive into the stirring kettle, and continuously stirring for 3-5 min;
s3: adding tackifier into the stirring kettle at constant speed, stirring for 5-6min, and mixing thoroughly;
s4: switching a stirring mode, slowly adding the synthetic fibers into the stirring kettle, and continuously stirring for 1-2 min;
s5: and switching a stirring mode, adding the solid powder into the stirring kettle at a constant speed, and continuously stirring for 35-45min to obtain the environment-friendly shield tail sealing grease.
Further, the stirring mode includes one of a forward rotation stirring mode and a reverse rotation stirring mode.
The environment-friendly shield tail sealing grease is applied to sealing of a shield tail of a shield machine in shield method tunnel construction, and environmental protection performance and physical and chemical performance tests are carried out; the environmental protection performance test comprises one or more of an earthworm acute toxicity test, a daphnia 21-day breeding test, a short-term toxicity test at a fish embryo-yolk sac absorption stage, a rapid biodegradation test and an inherent biodegradation test; the physical and chemical performance test comprises one or more of penetration/temperature, pumping performance and water pressure sealing performance.
Further, the acute toxicity of earthworms in environmental protection performance: 14d-LC >1000 mg/kg; 21-day daphnia breeding test: NOEC >10.0mg/L, short-term toxicity test at fish embryo-yolk sac absorption stage: NOEC >10.0 mg/L; fast biodegradation test: the degradation rate in a 10-day observation period in a 28-day test period is more than or equal to 60 percent; intrinsic biodegradation test: the degradation rate in a test period of 28 days is more than or equal to 60 percent; the penetration/25 ℃ in the physical and chemical properties is 220-240; the pumpability is 30 +/-2 s; the water pressure resistant sealing performance is no water dripping.
The environment-friendly shield tail sealing grease disclosed by the invention is composed of the following raw materials, by weight, 10-30 parts of base oil, 10-25 parts of tackifier, 2-5 parts of additive, 2-4 parts of fiber and 35-55 parts of solid powder, wherein the base oil comprises one or more of adeps bovis seu Bubali, soybean oil and rapeseed oil, so that the sealing grease has excellent biodegradability, avoids pollution to urban underground water and soil, is safe and environment-friendly, can meet the requirement index of a client on the environment friendliness of the shield tail sealing grease, radically solves the client requirement, and generates very large market influence and economic benefit.
Drawings
Fig. 1 is a flow chart of a preparation method of the environment-friendly shield tail sealing grease.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The environment-friendly shield tail sealing grease comprises, by weight, 10-30 parts of base oil, 10-25 parts of tackifier, 2-5 parts of additive, 2-4 parts of fiber and 35-55 parts of solid powder, wherein the base oil comprises adeps bovis seu Bubali, soybean oil, rapeseed oil and the like, so that the sealing grease has excellent biodegradability, avoids pollution to urban underground water and soil, is safe and environment-friendly, can meet the requirement index of a client on the environment-friendliness of the shield tail sealing grease, radically solves the client requirement, and generates great market influence and economic benefit.
As a preferred embodiment of the present invention, it may also have the following additional technical features: the tackifier comprises polyisobutylene, alkyd resin, ethylene propylene rubber and the like, wherein the polyisobutylene is called PB for short, is a colorless, tasteless and transparent excellent tackifier, has good tackifying effect and good low temperature resistance, is nontoxic and environment-friendly, is used in shield tail sealing grease for a high water pressure resistant shield, can improve the viscosity of the grease and ensures the sealing water pressure resistance; the alkyd resin has a group with stronger polarity and stronger charge, can react with the surface of a metal substrate to form a stronger chemical bond, and can enhance the bonding capability of fibers and grease in a product, so that the adhesion and the bonding force of shield tail sealing grease are improved; the ethylene propylene rubber is a synthetic rubber taking ethylene and propylene as main monomers, has excellent low-density high filling property, weather resistance, ozone resistance, heat resistance, acid and alkali resistance, water vapor resistance, color stability, oil filling property and normal-temperature flow, can be filled in the clearance between the holes of the steel wire brush, effectively prevents the infiltration of soil and sand, and plays a role in sealing and protecting. The tackifier is matched with each other for use, so that the bonding capability of the sealing grease is improved, and the sealing property and the water resistance of the sealing grease are improved.
In the embodiment, the additive is bentonite which is a thickening rheological agent and can be mixed with base oil to prepare a lubricant, so that the lubricating property of the sealing grease is improved, and meanwhile, the bentonite is matched with other substances to improve the waterproof effect and the adhesive capacity of the sealing grease.
In this embodiment, the fibers are synthetic fibers including one or more of lignin, polypropylene fibers, PLA fibers; the mass ratio of the lignin, the polypropylene fiber and the PLA fiber is 1:1.5-2.0:2.0-3.0, preferably 1:1.6:2.5, so that the synthetic fiber can be matched with other substances in a formula, and the waterproof effect and the adhesive capacity of the sealing grease are improved. The lignocellulose is nontoxic and environment-friendly, can be biodegraded, has a three-dimensional net structure, is particularly suitable for shield tail sealing grease for a high water pressure resistant shield as a framework component of the grease, ensures the high water pressure resistance of the shield tail sealing grease, and can improve the waterproof effect and the adhesive capacity of the sealing grease by being matched with polypropylene fibers and PLA fibers.
In the embodiment, the solid powder comprises one or more of anhydrous calcium carbonate and mica powder, has the unique advantages of small heat conductivity coefficient, flame retardance, light weight, sound absorption, insulation, high mechanical strength, no toxicity or irritation to a human body and the like, and is used in the shield tail sealing grease for the shield with high water resistance to improve the water pressure resistance and the consistency.
As shown in fig. 1, a method for preparing an environment-friendly shield tail sealing grease comprises the following steps:
s1: adding the base oil into a stirring kettle for stirring, starting forward rotation stirring, and heating to 40-60 ℃;
s2: slowly adding the additive into the stirring kettle, and continuously stirring for 3-5 min;
s3: adding tackifier into the stirring kettle at constant speed, stirring for 5-6min, and mixing thoroughly;
s4: switching to a reverse stirring mode, slowly adding the synthetic fibers into the stirring kettle, and continuously stirring for 1-2min, so that all the raw materials can be fully and uniformly mixed, and the occurrence of lumps is effectively avoided;
s5: and (3) starting a forward rotation stirring mode, adding the solid powder into the stirring kettle at a constant speed, and continuously stirring for 35-45min to obtain the environment-friendly shield tail sealing grease.
The embodiments of the present invention are described in further detail below.
Example one
600g of adeps bovis seu Bubali and adeps Caprae seu Ovis are poured into a stirring kettle at constant speed, and are started to rotate positively to stir, and are heated to 60 ℃. Then slowly pouring 60g of the treated bentonite into a stirring kettle, continuously stirring for 3-5min, then pouring 300g of polyisobutylene and 150g of alkyd resin into the stirring kettle at a constant speed, continuously stirring for 5min, fully mixing uniformly, then switching to a reverse stirring mode, slowly adding 60g of synthetic fiber into the stirring kettle, and stirring for 1-2 min; and finally, starting a forward rotation stirring mode, pouring 75g of mica powder and 1350g of calcium powder into a stirring kettle at a constant speed, and keeping stirring for 40min to obtain the environment-friendly shield tail sealing grease.
Example two
430g of rapeseed oil is poured into a stirring kettle at a constant speed, and is stirred in a forward rotation manner, and the temperature is raised to 50 ℃. Then slowly pouring 100g of the treated bentonite into a stirring kettle, continuously stirring for 3-5min, then pouring 220g of polyisobutylene and 230g of alkyd resin into the stirring kettle at a constant speed, continuously stirring for 5min, fully mixing uniformly, switching to a reverse stirring mode, slowly adding 55g of synthetic fiber into the stirring kettle, and stirring for 1-2 min; and finally, starting a forward rotation stirring mode, pouring 75g of mica powder and 1400g of calcium powder into a stirring kettle at a constant speed, and keeping stirring for 40min to obtain the environment-friendly shield tail sealing grease.
EXAMPLE III
500g of soybean oil is poured into a stirring kettle at a constant speed, and is started to rotate positively to stir, and the temperature is raised to 40 ℃. Then, slowly pouring 125g of the treated bentonite into a stirring kettle, continuously stirring for 3-5min, then pouring 100g of ethylene propylene rubber and 430g of alkyd resin into the stirring kettle at a constant speed, continuously stirring for 5min, fully mixing uniformly, switching to a reverse stirring mode, slowly adding 55g of synthetic fiber into the stirring kettle, and stirring for 1-2 min; and finally, starting a forward rotation stirring mode, pouring 75g of mica powder and 1350g of calcium powder into a stirring kettle at a constant speed, and keeping stirring for 40min to obtain the environment-friendly shield tail sealing grease.
The application of the environment-friendly shield tail sealing grease is characterized in that the environment-friendly shield tail sealing grease prepared in the embodiment 1-3 is applied to sealing of a shield tail of a shield machine in shield method tunnel construction, and environmental protection performance and physical and chemical performance are tested; wherein, the environmental protection performance test comprises an earthworm acute toxicity test, a daphnia 21-day breeding test, a short-term toxicity test at a fish embryo-yolk sac absorption stage, a rapid biodegradation test and an inherent biodegradation test; the physical and chemical performance tests comprise penetration/temperature, pumpability, hydraulic pressure resistance, and the like, and specific detection results are shown in table 1.
TABLE 1 environmental protection and physical and chemical properties data of environmental protection shield tail sealing grease
Through the detection of the indexes (as shown in table 1) of the 3 embodiments of the invention, the environment-friendly shield tail sealing grease has excellent biodegradability, avoids pollution to urban underground water and soil, is safe and environment-friendly, can meet the requirement index of a client on the environment-friendliness of the shield tail sealing grease, fundamentally solves the client requirement, and can generate great market influence and economic benefit. The environment-friendly shield tail sealing grease prepared by the invention can be applied to sealing of the shield tail of a shield machine in shield method tunnel construction by strictly controlling the control of raw material selection, process feeding sequence, stirring time, detection items and the like.
The above additional technical features can be freely combined and used in superposition by those skilled in the art without conflict.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The utility model provides an environment-friendly shield tail sealing grease which characterized in that: the composite material comprises, by weight, 10-30 parts of base oil, 10-25 parts of a tackifier, 2-5 parts of an additive, 2-4 parts of fibers and 35-55 parts of solid powder, wherein the base oil comprises one or more of adeps bovis seu Bubali, mutton fat, soybean oil and rapeseed oil.
2. The environment-friendly shield tail sealing grease of claim 1, wherein: the tackifier comprises one or more of polyisobutylene, alkyd resin and ethylene propylene rubber.
3. The environment-friendly shield tail sealing grease of claim 1, wherein: the additive is bentonite.
4. The environment-friendly shield tail sealing grease of claim 1, wherein: the fibers are synthetic fibers including one or more of lignin, polypropylene fibers, PLA fibers.
5. The environment-friendly shield tail sealing grease of claim 4, wherein: the mass ratio of the lignin to the polypropylene fiber to the PLA fiber is 1:1.5-2.0: 2.0-3.0.
6. The environment-friendly shield tail sealing grease of claim 1, wherein: the solid powder comprises one or more of anhydrous calcium carbonate and mica powder.
7. A preparation method of environment-friendly shield tail sealing grease is characterized by comprising the following steps: the method for preparing the environment-friendly shield tail sealing grease of any one of claims 1 to 6 comprises the following steps:
s1: adding the base oil into a stirring kettle, stirring, and heating to 40-60 ℃;
s2: slowly adding the additive into the stirring kettle, and continuously stirring for 3-5 min;
s3: adding tackifier into the stirring kettle at constant speed, stirring for 5-6min, and mixing thoroughly;
s4: switching a stirring mode, slowly adding the synthetic fibers into the stirring kettle, and continuously stirring for 1-2 min;
s5: and switching a stirring mode, adding the solid powder into the stirring kettle at a constant speed, and continuously stirring for 35-45min to obtain the environment-friendly shield tail sealing grease.
8. The preparation method of the environment-friendly shield tail sealing grease as claimed in claim 7, wherein the preparation method comprises the following steps: the stirring mode comprises one of a forward rotation stirring mode and a reverse rotation stirring mode.
9. The application of the environment-friendly shield tail sealing grease is characterized in that: applying the environment-friendly shield tail sealing grease of any one of claims 1-6 to the sealing of the shield tail of a shield machine in shield method tunnel construction, and performing environmental protection performance and physical and chemical performance tests; the environmental protection performance test comprises one or more of an earthworm acute toxicity test, a daphnia 21-day breeding test, a short-term toxicity test at a fish embryo-yolk sac absorption stage, a rapid biodegradation test and an inherent biodegradation test; the physical and chemical performance test comprises one or more of penetration/temperature, pumping performance and water pressure sealing performance.
10. The application of the environment-friendly shield tail sealing grease as claimed in claim 9, wherein: the earthworm acute toxicity in the environmental protection performance is as follows: 14d-LC >1000 mg/kg; 21-day daphnia breeding test: NOEC >10.0mg/L, short-term toxicity test at fish embryo-yolk sac absorption stage: NOEC >10.0 mg/L; fast biodegradation test: the degradation rate in a 10-day observation period in a 28-day test period is more than or equal to 60 percent; intrinsic biodegradation test: the degradation rate in a test period of 28 days is more than or equal to 60 percent; the penetration/25 ℃ in the physical and chemical properties is 220-240; the pumpability is 30 +/-2 s; the water pressure resistant sealing performance is no water dripping.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011549144.4A CN112500908A (en) | 2020-12-24 | 2020-12-24 | Environment-friendly shield tail sealing grease and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011549144.4A CN112500908A (en) | 2020-12-24 | 2020-12-24 | Environment-friendly shield tail sealing grease and preparation method and application thereof |
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| CN112500908A true CN112500908A (en) | 2021-03-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116855303A (en) * | 2023-07-06 | 2023-10-10 | 中国矿业大学 | High-water-pressure-resistant ecological shield tail sealing grease |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103937590A (en) * | 2014-03-25 | 2014-07-23 | 广州澳润合成材料有限公司 | Shield tail sealing grease used for shield tunneling machine |
| CN107353976A (en) * | 2017-07-24 | 2017-11-17 | 湖北工程学院 | A kind of special tail seal grease of shield of shield machine and preparation method thereof |
| CN108865372A (en) * | 2018-08-01 | 2018-11-23 | 中铁四局集团有限公司 | Environment-friendly shield tail sealing grease and preparation method thereof |
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2020
- 2020-12-24 CN CN202011549144.4A patent/CN112500908A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103937590A (en) * | 2014-03-25 | 2014-07-23 | 广州澳润合成材料有限公司 | Shield tail sealing grease used for shield tunneling machine |
| CN107353976A (en) * | 2017-07-24 | 2017-11-17 | 湖北工程学院 | A kind of special tail seal grease of shield of shield machine and preparation method thereof |
| CN108865372A (en) * | 2018-08-01 | 2018-11-23 | 中铁四局集团有限公司 | Environment-friendly shield tail sealing grease and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116855303A (en) * | 2023-07-06 | 2023-10-10 | 中国矿业大学 | High-water-pressure-resistant ecological shield tail sealing grease |
| CN116855303B (en) * | 2023-07-06 | 2023-12-29 | 中国矿业大学 | High-water-pressure-resistant ecological shield tail sealing grease |
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