CN111253998A - Shield tail sealing grease and preparation method and application thereof - Google Patents
Shield tail sealing grease and preparation method and application thereof Download PDFInfo
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- CN111253998A CN111253998A CN202010091788.7A CN202010091788A CN111253998A CN 111253998 A CN111253998 A CN 111253998A CN 202010091788 A CN202010091788 A CN 202010091788A CN 111253998 A CN111253998 A CN 111253998A
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- grease
- sealing grease
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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
- 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
- C10M169/04—Mixtures of base-materials and additives
- C10M169/044—Mixtures of base-materials and additives the additives being a mixture of non-macromolecular and macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K3/1006—Materials in mouldable or extrudable form for sealing or packing joints or covers characterised by the chemical nature of one of its constituents
-
- 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
- C10M177/00—Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2003/1087—Materials or components characterised by specific uses
-
- 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
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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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/10—Compounds containing silicon
- C10M2201/102—Silicates
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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
- 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
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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
- 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
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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
- 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
- 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
- C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
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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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/10—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing cycloaliphatic monomers
-
- 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
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/16—Naphthenic acids
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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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
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 antirust agent. The shield tail sealing grease provided by the invention comprises anhydrous calcium-based lubricating grease, asbestos fiber, calcium carbonate, high-molecular polymer, petroleum resin and an antirust agent, and performance tests of the product prove that the shield tail sealing grease provided by the invention has good hydraulic pressure resistance, pumpability and lubricity.
Description
Technical Field
The invention relates to the technical field of seal grease, in particular to shield tail seal grease and a preparation method and application thereof.
Background
At present, the underground traffic in China develops rapidly, and in order to construct underground engineering under the condition of not influencing the established ground buildings, the construction method adopted at present is a shield method or a pipe jacking method. The shield machine is a construction machine for building tunnel, and can play the role of supporting when excavating stratum and assembling lining.
When the shield machine is used for tunneling, relative sliding friction exists between the shield tail and the installed pipe sheets, in order to prevent external underground water and slurry from flowing into the shield head, a shield tail sealing device must be arranged between the shield tail and the installed pipe sheets, shield tail sealing grease is one of ideal sealing materials between the shield tail and the installed pipe sheets, the shield tail can be effectively protected by isolating underground water and slurry, and therefore the shield can be effectively pushed forward.
The shield tail sealing grease sold in the market has excellent water pressure resistance sealing performance, pumping performance and lubricating performance, but is expensive and high in use cost due to the variety of the lubricating grease in the components.
Disclosure of Invention
The shield tail sealing grease provided by the invention is low in cost and has excellent water pressure resistance sealing property, pumpability and lubricity.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention 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 antirust agent.
Preferably, the length of the asbestos fiber is 1-2 mm.
Preferably, the granularity of the calcium carbonate is 1000-1200 meshes.
Preferably, the high molecular polymer comprises one or more of ethylene propylene rubber, polyisobutylene and atactic polypropylene.
Preferably, the petroleum resin includes one or more of C9 petroleum resin, 120 petroleum resin and terpene resin.
Preferably, the rust inhibitor comprises one or more of barium petroleum sulfonate, zinc naphthenate and barium dinonylnaphthalene sulfonate.
The invention also provides a preparation method of the shield tail sealing grease in the technical scheme, which comprises the following steps:
mixing anhydrous calcium-based lubricating grease, asbestos fiber, calcium carbonate, high-molecular polymer, petroleum resin and an antirust agent to obtain the shield tail sealing grease.
Preferably, the mixing temperature is 25-70 ℃.
Preferably, the mixing is carried out under stirring;
the stirring speed is 30-40 rpm, and the stirring time is 60-120 min.
The invention also provides the shield tail sealing grease in the technical scheme or the shield tail sealing grease prepared by the preparation method in the technical scheme, which is used as a sealing material to be applied to a shield machine.
In order to achieve the purpose, the shield tail sealing grease provided by the invention 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 antirust agent. The shield tail sealing grease provided by the invention is added with the anhydrous calcium-based lubricating grease, so that the cost of the shield tail sealing grease product is reduced, and the shield tail sealing grease has good oxidation stability, water resistance and colloid stability; the asbestos fiber is insoluble in water, so that the shield tail sealing grease has good sealing performance, the high-molecular polymer can improve the adhesiveness and the sealing performance of the shield tail sealing grease, the petroleum resin can be used as a curing agent to quickly fix and form the shield tail sealing grease in the using process and improve the sealing performance of the product, and the calcium carbonate is used as an antifriction agent to improve the wear resistance of the shield tail sealing grease. The performance test of the product of the invention proves that the shield tail sealing grease product provided by the invention has good water pressure resistance, sealing property, pumping property and lubricating property.
Detailed Description
The invention 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 antirust agent.
The shield tail sealing grease comprises, by mass, 20-50 parts of anhydrous calcium-based lubricating grease, preferably 20-35 parts, and more preferably 30-35 parts. The source of the anhydrous calcium-based grease of the present invention is not particularly limited, and commercially available products well known to those skilled in the art may be used.
In the invention, the addition of the anhydrous calcium-based lubricating grease not only ensures that the shield tail sealing grease has good water pressure resistance, pumpability and lubricity, but also reduces the cost of the shield tail sealing grease.
Based on the mass parts of the anhydrous calcium-based lubricating grease, the shield tail sealing grease comprises 20-40 parts of asbestos fiber, preferably 20-30 parts, and more preferably 25-30 parts. In the present invention, the length of the asbestos fiber is preferably 1 to 2 mm. The invention does not require a particular source of the asbestos fibers and may be practiced using commercially available products well known to those skilled in the art.
Based on the mass parts of the anhydrous calcium-based lubricating grease, the shield tail sealing grease provided by the invention comprises 25-40 parts of calcium carbonate, and preferably 32-37 parts. In the invention, the granularity of the calcium carbonate is preferably 1000-1200 meshes. The source of the calcium carbonate is not particularly critical in the present invention and commercially available products well known to those skilled in the art may be used.
Based on the mass parts of the anhydrous calcium-based lubricating grease, the shield tail sealing grease comprises 1-3 parts of high-molecular polymer, preferably 2-3 parts, and more preferably 2.5-3 parts. In the present invention, the high molecular polymer preferably includes one or more of ethylene propylene rubber, polyisobutylene, and atactic polypropylene, and further preferably includes polyisobutylene. In the invention, when the high molecular polymer preferably comprises two or more of ethylene propylene rubber, polyisobutylene and random polypropylene, the mixing proportion of the ethylene propylene rubber, the polyisobutylene and the random polypropylene has no special requirement and can be mixed by any proportion. The source of the high molecular polymer is not particularly required in the present invention, and commercially available products known to those skilled in the art may be used.
The shield tail sealing grease comprises, by mass, 1-6 parts of petroleum resin, preferably 1-2 parts of petroleum resin, and more preferably 1.5-2 parts of anhydrous calcium-based lubricating grease. In the present invention, the petroleum resin preferably includes one or more of C9 petroleum resin, 120 petroleum resin and terpene resin, and further preferably includes 120 petroleum resin. In the present invention, when the petroleum resin preferably includes two or more of C9 petroleum resin, 120 petroleum resin and terpene resin, the mixing ratio of the C9 petroleum resin, 120 petroleum resin and terpene resin is not particularly required, and the petroleum resin may be mixed at any ratio. In the present invention, there is no particular requirement on the source of the petroleum resin, and a commercially available product well known to those skilled in the art may be used.
Based on the mass parts of the anhydrous calcium-based lubricating grease, the shield tail sealing grease comprises 2-3 parts of an antirust agent, and preferably 2.5-3 parts. In the present invention, the rust inhibitor preferably includes one or more of barium petroleum sulfonate, zinc naphthenate, and barium dinonylnaphthalenesulfonate, and further preferably includes barium petroleum sulfonate. The present invention has no particular requirement on the source of the rust inhibitor, and a commercially available product well known to those skilled in the art may be used.
In the invention, the addition of the anhydrous calcium-based lubricating grease enables the shield tail sealing grease to have good oxidation stability, water resistance and colloid stability; the asbestos fiber is insoluble in water and has good sealing performance, the petroleum resin serving as a curing agent can improve the rapid fixation and forming of the shield tail sealing grease in the using process, and the shield tail sealing grease product provided by the invention has good hydraulic pressure resistance, good pumping performance and good lubricating performance through the synergistic effect of the three substances, and meanwhile, the production cost of the shield tail sealing grease is reduced.
In the invention, the calcium carbonate is used as an anti-wear agent, so that the anti-wear performance of the shield tail sealing grease can be improved.
The invention also provides a preparation method of the shield tail sealing grease, which comprises the following steps:
mixing anhydrous calcium-based lubricating grease, asbestos fiber, calcium carbonate, high-molecular polymer, petroleum resin and an antirust agent to obtain the shield tail sealing grease.
In the present invention, the mixing preferably comprises the steps of:
carrying out first mixing on the anhydrous calcium-based lubricating grease, the high molecular polymer and the petroleum resin to obtain a first mixture;
carrying out second mixing on the first mixture and calcium carbonate to obtain a second mixture;
and thirdly mixing the second mixture, asbestos fiber and an antirust agent to obtain the shield tail sealing grease.
According to the invention, the anhydrous calcium-based lubricating grease, the high molecular polymer and the petroleum resin are subjected to first mixing to obtain a first mixture.
In the invention, the temperature of the first mixing is preferably 25-70 ℃, and more preferably 50-65 ℃; the time for the first mixing is preferably 60 to 120min, more preferably 73 to 112min, and still more preferably 90 to 105 min. In the present invention, the first mixing is preferably performed under stirring conditions, the stirring speed is preferably 30 to 40rpm, and the stirring is preferably mechanical stirring. The anhydrous calcium-based lubricating grease, the high molecular polymer and the petroleum resin are mixed in any order without special requirements.
After the first mixture is obtained, the invention carries out second mixing on the first mixture and calcium carbonate to obtain a second mixture.
In the invention, the temperature of the second mixing is preferably 25-70 ℃, and more preferably 50-70 ℃; the second mixing time is preferably 60 to 120min, more preferably 73 to 112min, and even more preferably 90 to 105 min. In the present invention, the second mixing is preferably performed under stirring conditions, the stirring speed is preferably 30 to 40rpm, and the stirring is preferably mechanical stirring.
After the second mixture is obtained, the second mixture, the asbestos fiber and the antirust agent are subjected to third mixing to obtain the shield tail sealing grease.
In the invention, the temperature of the third mixing is preferably 25-70 ℃, and more preferably 50-70 ℃; the second mixing time is preferably 60 to 120min, more preferably 73 to 112min, and even more preferably 90 to 105 min. In the present invention, the second mixing is preferably performed under stirring conditions, the stirring speed is preferably 30 to 40rpm, and the stirring is preferably mechanical stirring. In the present invention, the mixing order of the second mixture, the asbestos fiber, and the rust preventive agent is not required, and any order may be used.
The invention also provides the shield tail sealing grease in the technical scheme or the shield tail sealing grease prepared by the preparation method in the technical scheme, which is used as a sealing material to be applied to a shield machine. The method of application of the present invention is not particularly limited, and the method of application known to those skilled in the art may be used.
In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
Example 1
Kneading 25g of anhydrous calcium-based grease, 2g of polyisobutylene and 1g of 120 petroleum resin at 25 ℃ with mechanical stirring (stirring speed of 30rpm, stirring time of 1 hour) to obtain a first mixture;
mechanically stirring and mixing the first mixture and 35g of calcium carbonate (1100 meshes) at 30 ℃ (stirring speed is 30rpm, and stirring time is 1h) to obtain a second mixture;
and mechanically stirring and mixing the first mixture, 35g of asbestos fibers (2mm) and 2g of barium petroleum sulfonate at 50 ℃ (the stirring speed is 30rpm, and the stirring time is 2 hours) to obtain the shield tail sealing grease.
Example 2
Mechanically stirring and kneading 30g of anhydrous calcium-based grease, 3g of polyisobutylene and 2g of 120 petroleum resin at 50 ℃ (stirring speed is 30rpm, and stirring time is 1h) to obtain a first mixture;
mechanically stirring and mixing the first mixture and 32g of calcium carbonate (1100 meshes) at 30 ℃ (stirring speed is 30rpm, and stirring time is 1h) to obtain a second mixture;
and mechanically stirring and mixing the second mixture, 30g of asbestos fibers (1.5mm) and 2g of barium petroleum sulfonate at the temperature of 35 ℃ (the stirring speed is 40rpm, and the stirring time is 2 hours) to obtain the shield tail sealing grease.
Example 3
Kneading 32g of anhydrous calcium-based grease, 3g of polyisobutylene and 2g of 120 petroleum resin at 45 ℃ with mechanical stirring (stirring speed 40rpm, stirring time 1 hour) to obtain a first mixture;
mechanically stirring and mixing the first mixture and 35g of calcium carbonate (1200 meshes) at 39 ℃ (stirring speed is 40rpm, and stirring time is 1h) to obtain a second mixture;
and mechanically stirring and mixing the second mixture, 25g of asbestos fibers (2mm) and 3g of barium petroleum sulfonate at 37 ℃ (the stirring speed is 40rpm, and the stirring time is 2 hours) to obtain the shield tail sealing grease.
Test example
And (3) carrying out product performance test on the shield tail sealing grease prepared in the embodiment 1-3, wherein the specific test method comprises the following steps:
(1) and (3) testing the sealing property: the test adopts a general hydrostatic test method, a metal or organic glass cylinder with the diameter of 50mm and the height of 100mm is taken, an air inlet is arranged above the cylinder, a layer of metal net with the aperture of 1mm or 0.5mm is attached below the cylinder (the metal net simulates a shield tail brush metal bundle), during the test, shield tail sealing grease with the thickness of 25mm prepared in the embodiment 1-3 is added above the metal net, no air bubbles are needed during filling, water with the thickness of about 50mm is added on the shield tail sealing grease, and then the pressure is applied on the water surface (the air pressure is 3.5 MPa). And (3) measuring the time for the water to flow out from the bottom, and when the pore diameter of the metal mesh is 1mm or 0.5mm, keeping the water leakage for 5 minutes, wherein the sealing property is qualified, and otherwise, the sealing property is not qualified. The products provided by the embodiments 1-3 of the invention are tested under the condition of 3.5MPa, the test lasts for 5 minutes, and no water leaks from the embodiments 1, 2 and 3, so that the shield tail sealing grease products provided by the embodiments 1, 2 and 3 of the invention have quite good water pressure resistance and sealing performance.
(2) Testing the pumpability: the grease gun purchased from the market is adopted, and after the grease gun is filled with the shield tail sealing grease, the grease gun can be manually operated, so that the grease can be easily and continuously added, and the grease gun is qualified, otherwise, the grease gun is unqualified. Tests show that the products provided by the examples 1, 2 and 3 can easily realize easy and continuous fat-adding, so that the pumping performance is good.
(3) Ignition point test: a steel plate with the thickness of 5-8 mm is placed on an electric furnace to be heated, 1g of the product provided by the invention in the embodiment 1-3 is placed on the steel plate, and the temperature of the sample during combustion is measured by an infrared thermometer. The combustion temperature of the products provided by the embodiments 1-3 of the invention is more than 300 ℃.
(4) Other tests were carried out according to the GB/T standard method.
And (3) carrying out product performance test on the shield tail sealing grease prepared in the embodiment 1-3, wherein specific test results are shown in table 1.
Table 1 test results of properties of shield tail sealing grease prepared in examples 1-3
As can be seen from the data in Table 1, the shield tail sealing grease product prepared in the embodiments 1-3 of the invention has good hydraulic pressure sealing performance, pumping performance and lubricating performance.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (10)
1. The shield tail sealing grease is characterized by comprising 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 antirust agent.
2. The shield tail sealing grease as claimed in claim 1, wherein the asbestos fiber has a length of 1-2 mm.
3. The shield tail sealing grease of claim 1, wherein the calcium carbonate has a particle size of 1000-1200 mesh.
4. The shield tail sealing grease of claim 1, wherein the high molecular polymer comprises one or more of ethylene propylene rubber, polyisobutylene, and atactic polypropylene.
5. The shield tail sealing grease of claim 1, wherein the petroleum resin comprises one or more of C9 petroleum resin, 120 petroleum resin and terpene resin.
6. The shield tail sealing grease of claim 1, wherein the rust inhibitor comprises one or more of barium petroleum sulfonate, zinc naphthenate, and barium dinonylnaphthalene sulfonate.
7. The preparation method of the shield tail sealing grease as claimed in any one of claims 1 to 6, characterized by comprising the following steps:
mixing anhydrous calcium-based lubricating grease, asbestos fiber, calcium carbonate, high-molecular polymer, petroleum resin and an antirust agent to obtain the shield tail sealing grease.
8. The method according to claim 7, wherein the mixing temperature is 25 to 70 ℃.
9. The production method according to claim 7 or 8, characterized in that the mixing is performed under stirring;
the stirring speed is 30-40 rpm, and the stirring time is 60-120 min.
10. The shield tail sealing grease of any one of claims 1 to 6 or the shield tail sealing grease prepared by the preparation method of any one of claims 7 to 9 is applied to a shield machine as a sealing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010091788.7A CN111253998B (en) | 2020-02-13 | 2020-02-13 | Shield tail sealing grease and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010091788.7A CN111253998B (en) | 2020-02-13 | 2020-02-13 | Shield tail sealing grease and preparation method and application thereof |
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| CN111253998A true CN111253998A (en) | 2020-06-09 |
| CN111253998B CN111253998B (en) | 2022-03-29 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111892983A (en) * | 2020-06-19 | 2020-11-06 | 王爱国 | Harmless and flame-retardant shield tail sealing grease and preparation method thereof |
| CN112029557A (en) * | 2020-07-27 | 2020-12-04 | 吉诺润滑技术(苏州)有限公司 | High-performance shield tail sealing grease and preparation method thereof |
| CN112608781A (en) * | 2020-12-08 | 2021-04-06 | 武汉博达特种润滑技术有限公司 | Rod-shaped valve rod sealant composition and preparation method thereof |
| CN114874825A (en) * | 2021-06-26 | 2022-08-09 | 上海鸿栩化工科技有限公司 | Production process and use method of shield tail sealing grease |
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Cited By (6)
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| CN111892983A (en) * | 2020-06-19 | 2020-11-06 | 王爱国 | Harmless and flame-retardant shield tail sealing grease and preparation method thereof |
| CN111892983B (en) * | 2020-06-19 | 2022-08-12 | 王曙光 | Harmless and flame-retardant shield tail sealing grease and preparation method thereof |
| CN112029557A (en) * | 2020-07-27 | 2020-12-04 | 吉诺润滑技术(苏州)有限公司 | High-performance shield tail sealing grease and preparation method thereof |
| CN112608781A (en) * | 2020-12-08 | 2021-04-06 | 武汉博达特种润滑技术有限公司 | Rod-shaped valve rod sealant composition and preparation method thereof |
| CN112608781B (en) * | 2020-12-08 | 2022-07-19 | 武汉博达特种润滑技术有限公司 | Rod-shaped valve rod sealant composition and preparation method thereof |
| CN114874825A (en) * | 2021-06-26 | 2022-08-09 | 上海鸿栩化工科技有限公司 | Production process and use method of shield tail sealing grease |
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