WO2016021690A1 - Tail seal composition for use in shield machine - Google Patents
Tail seal composition for use in shield machine Download PDFInfo
- Publication number
- WO2016021690A1 WO2016021690A1 PCT/JP2015/072377 JP2015072377W WO2016021690A1 WO 2016021690 A1 WO2016021690 A1 WO 2016021690A1 JP 2015072377 W JP2015072377 W JP 2015072377W WO 2016021690 A1 WO2016021690 A1 WO 2016021690A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tail seal
- shield machine
- seal composition
- fibers
- oil
- Prior art date
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 50
- 239000000835 fiber Substances 0.000 claims abstract description 55
- 239000002199 base oil Substances 0.000 claims abstract description 31
- 239000000843 powder Substances 0.000 claims abstract description 21
- 239000002480 mineral oil Substances 0.000 claims abstract description 19
- 235000010446 mineral oil Nutrition 0.000 claims abstract description 18
- 229920001083 polybutene Polymers 0.000 claims abstract description 16
- 239000000314 lubricant Substances 0.000 claims abstract description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 10
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 5
- 239000000454 talc Substances 0.000 claims description 5
- 229910052623 talc Inorganic materials 0.000 claims description 5
- 229920002994 synthetic fiber Polymers 0.000 claims description 4
- 239000012209 synthetic fiber Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims 1
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 239000002657 fibrous material Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 230000001050 lubricating effect Effects 0.000 description 15
- 239000002562 thickening agent Substances 0.000 description 14
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000003921 oil Substances 0.000 description 9
- 235000019198 oils Nutrition 0.000 description 9
- -1 fatty acid esters Chemical class 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000003112 inhibitor Substances 0.000 description 4
- 239000000344 soap Substances 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920000620 organic polymer Polymers 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- 235000019482 Palm oil Nutrition 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 150000007933 aliphatic carboxylic acids Chemical class 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000010775 animal oil Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003240 coconut oil Substances 0.000 description 2
- 235000019864 coconut oil Nutrition 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 125000005442 diisocyanate group Chemical group 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- 239000002540 palm oil Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920013639 polyalphaolefin Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- 239000003760 tallow Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 235000015112 vegetable and seed oil Nutrition 0.000 description 2
- 239000008158 vegetable oil Substances 0.000 description 2
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 1
- 244000266618 Atriplex confertifolia Species 0.000 description 1
- 235000012137 Atriplex confertifolia Nutrition 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 241000324801 Castor fiber fiber Species 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 241000252203 Clupea harengus Species 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 235000019483 Peanut oil Nutrition 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920002396 Polyurea Polymers 0.000 description 1
- 235000019484 Rapeseed oil Nutrition 0.000 description 1
- 235000019774 Rice Bran oil Nutrition 0.000 description 1
- 235000019485 Safflower oil Nutrition 0.000 description 1
- 241000269851 Sarda sarda Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 235000019486 Sunflower oil Nutrition 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 235000015278 beef Nutrition 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 1
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000010495 camellia oil Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 239000004359 castor oil Substances 0.000 description 1
- 235000019438 castor oil Nutrition 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 235000019868 cocoa butter Nutrition 0.000 description 1
- 229940110456 cocoa butter Drugs 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 235000005687 corn oil Nutrition 0.000 description 1
- 239000002285 corn oil Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 235000012343 cottonseed oil Nutrition 0.000 description 1
- 239000002385 cottonseed oil Substances 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000010460 hemp oil Substances 0.000 description 1
- 235000019514 herring Nutrition 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000000944 linseed oil Substances 0.000 description 1
- 235000021388 linseed oil Nutrition 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 235000021243 milk fat Nutrition 0.000 description 1
- 239000004006 olive oil Substances 0.000 description 1
- 235000008390 olive oil Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000000312 peanut oil Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000008165 rice bran oil Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 235000005713 safflower oil Nutrition 0.000 description 1
- 239000003813 safflower oil Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000011803 sesame oil Nutrition 0.000 description 1
- 239000008159 sesame oil Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000002600 sunflower oil Substances 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000010698 whale oil Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Classifications
-
- 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
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/32—Non-aqueous well-drilling compositions, e.g. oil-based
- C09K8/34—Organic liquids
-
- 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
- C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
- C10M101/02—Petroleum fractions
-
- 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
- C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
- C10M107/02—Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation
- C10M107/08—Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation containing butene
-
- 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
- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
- C10M125/10—Metal 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
- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
- C10M125/26—Compounds containing silicon or boron, e.g. silica, sand
- C10M125/30—Clay
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
-
- 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
Definitions
- the present invention relates to a tail seal composition for a shield machine.
- the shield machine When excavating a tunnel into the ground with a shield machine, the shield machine advances while excavating ground in the direction of travel, and segments behind the shield machine are sequentially assembled as the inner wall of the tunnel. ing.
- the outer diameter of the tunnel to be excavated (excavation opening diameter) is the outer diameter of the shield machine, but since the segment is assembled inside the shield machine, the outer diameter of the segment is less than the inner diameter of the shield machine. Become. For this reason, a gap is formed between the outer diameter of the tunnel and the outer diameter of the segment behind the shield machine, and this gap is filled with a backing agent as the shield machine advances.
- tail seal compositions with sufficiently high water-stopping properties have high viscosities, which may make it difficult to pump and cause problems such as interruption of excavation by a shield machine.
- a tail seal composition that can be easily pumped has a concern about water-stopping.
- the present invention solves such problems, and provides a tail seal composition having high water-stopping properties and excellent pumpability.
- the present inventors have surprisingly found that the use of a mixture of a predetermined ratio of mineral oil and polybutene as the lubricating base oil of the tail seal composition makes the fiber moderate. It has been found that the water-stopping property and the pumping property, which are problems that are contradictory to each other, can be remarkably improved at the same time, and that the water-stopping property and the pumping property can be further improved in a balanced manner by using a predetermined combination of fibers. .
- the present invention has been made based on such knowledge and is as follows.
- (2) The average length of the short fibers is 0.8 to 2.4 mm, and the average length of the long fibers is 1.5 to 10 times the average length of the short fibers contained.
- the tail seal composition for a shield machine according to the present invention can simultaneously improve the water-stopping property and the pumpability, it is possible to perform excavation with a shield machine efficiently and safely.
- the tail seal composition for a shield machine contains 15 to 60% by mass of a lubricating base oil, 30 to 70% by mass of inorganic powder, and 2 to 10% by mass of fiber.
- it has a density of 1.1 to 1.8 g / cm 3 at 15 ° C. because of ease of pumping, water-stopping, stability when mixed with water, and oil retention at high temperatures. ⁇ 1.5 g / cm 3 is more preferred, and 1.1 to 1.3 g / cm 3 is even more preferred.
- those having an immiscibility consistency of 150 to 350 are preferred, and 220 to 280 is more preferred.
- the measurement of the immiscible penetration referred to in the present invention is based on a method based on JISK2220.
- the tail seal composition for a shield machine of the present invention is substantially free of moisture.
- the fact that it does not substantially contain water means that it does not exclude water inevitably mixed in, but the water content is preferably 5% by mass or less based on the total amount of the tail seal composition, More preferably, it is 1 mass% or less.
- the lubricating base oil of the present invention contains mineral oil and polybutene in a mass ratio of 20: 1 to 1: 1. It is presumed that the adhesiveness of polybutene to the fiber, the fluidity of mineral oil, and the affinity of both improve the pumpability and water stoppage at the same time. When the content ratio of the mineral oil and polybutene is outside the above range, these effects are lowered.
- the content ratio of mineral oil and polybutene is preferably 10: 1 to 2: 1, and more preferably 5: 1 to 3: 1.
- the physical properties of the lubricating base oil are preferably those having a kinematic viscosity at 40 ° C.
- the pour point is preferably ⁇ 10 ° C. or lower, and the flash point is preferably 150 ° C. or higher from the viewpoint of safety.
- the content of the lubricating base oil is 15 to 60% by mass, preferably 25 to 58% by mass, more preferably 35 to 57% by mass, based on the total amount of the tail seal composition.
- the mineral oil used as the lubricating base oil can be a commercially available mineral oil-based lubricating oil or a mineral oil-based lubricating base oil that is a base oil. These are usually obtained by subjecting a distillate obtained by subjecting crude oil to atmospheric distillation, or further distilling the distillation residue under reduced pressure, as a base oil as a base oil, Alternatively, it is prepared by blending various additives and the like.
- the refining process includes hydrorefining, solvent extraction, solvent dewaxing, hydrodewaxing, sulfuric acid washing, clay treatment, etc., and these are combined in an appropriate order for treatment, thereby providing a mineral oil-based lubrication suitable for the present invention.
- An oil base oil can be obtained.
- a mixture of a plurality of refined oils having different properties obtained by using different crude oils or distillate oils by different process combinations and sequences can also be used as suitable mineral oils.
- This mineral oil preferably has an aromatic content of 20% or less from the viewpoint of handling safety.
- Polybutene is a copolymer having a long-chain hydrocarbon molecular structure in which normal butene is partially reacted with isobutene as a main component. Those having a number average molecular weight of 2,000 to 50,000, particularly 5,000 to 20,000 are preferably used.
- the content of polybutene is preferably 2 to 30% by mass, more preferably 5 to 15% by mass based on the total amount of the tail seal composition.
- Synthetic base oils include, for example, polymer polymers such as poly- ⁇ -olefin (PAO) and low molecular weight ethylene / ⁇ -olefin copolymers, silicone oils, fatty acid esters, fluorinated oils, alkylnaphthalene, etc. Or in combination.
- Animal and vegetable oil-based lubricating base oils include milk fat, beef tallow, lard (pig tallow), sheep fat, whale oil, coconut oil, bonito oil, herring oil, coconut oil, soybean oil, rapeseed oil, sunflower Oil, safflower oil, peanut oil, corn oil, cottonseed oil, rice bran oil, sesame oil, olive oil, linseed oil, castor oil, cocoa butter, palm oil, palm oil, hemp seed oil, rice oil, tea seed oil, etc. it can.
- Inorganic powder As the inorganic powder of the present invention, oxides such as silicon, aluminum, magnesium and calcium, hydroxides, carbonates, sulfates and the like can be used, and a mixture thereof and a naturally produced powder can be used. Ore powders containing these compounds as main components can also be used. Specifically, talc, calcium carbonate, magnesium carbonate, calcium sulfate, aluminum hydroxide, magnesium oxide, calcium oxide, aluminum oxide, silica, bentonite, diatomaceous earth, and the like, particularly talc or calcium carbonate powder are suitable. These inorganic powders may be used alone or as a mixture of a plurality of types.
- the inorganic powder preferably has an average particle size of 0.5 to 500 ⁇ m, more preferably 5 to 50 ⁇ m.
- the content of the inorganic powder is 30 to 70% by mass, preferably 35 to 60% by mass, based on the total amount of the tail seal composition.
- the tail seal composition it is necessary to adjust the tail seal composition to a suitable consistency, and it is used as a thickener in grease, etc., as a thickening agent for metal soap, urea thickener, organic polymer. It is preferable to use a thickener in combination.
- the content of the thickener is preferably 0.1 to 10% by mass, more preferably 0.2 to 5% by mass, based on the total amount of the tail seal composition.
- the metal soap thickener is composed of a metal carboxylate, and the carboxylic acid may be an aliphatic carboxylic acid such as stearic acid or azelaic acid, or an aromatic carboxylic acid such as terephthalic acid. Aliphatic carboxylic acids having 6 to 20 carbon atoms are preferred.
- the metal may be an alkali metal such as lithium or sodium, an alkaline earth metal such as calcium, or an amphoteric metal such as aluminum, but is preferably an alkali metal, particularly lithium.
- Such carboxylic acid metal salts may be used singly or in combination.
- urea-based thickener a diurea compound obtained by reaction of diisocyanate and monoamine, a polyurea compound obtained by reaction of diisocyanate and monoamine, diamine, and the like are suitable, and as an organic polymer thickener, PTFE (polytetrafluoroethylene) and the like are suitable.
- the thickeners such as metal soap, urea, and organic polymer used in combination with the inorganic powder may be used alone or in combination of two or more.
- the fiber is entangled with a brush that bundles metal nets and metal wires in the tail seal part of the shield machine, and is used to form a filter cloth layer having water-stopper together with a lubricant base oil and a thickener.
- the fiber content is 2 to 10% by mass, preferably 3 to 8% by mass, based on the total amount of the tail seal composition.
- This fiber contains short fibers and long fibers in order to improve the water-stopping property and pumpability in a balanced manner.
- the average length of the short fibers is 0.8 to 2.4 mm, preferably 1.0 to 2.0 mm.
- the average length of the long fibers is 1.5 to 10 times the average length of the short fibers used, and preferably 1.6 to 7 times.
- the mass ratio of long fibers to short fibers contained is 1: 4 to 4: 1, preferably 1: 2 to 2: 1.
- the average thickness (diameter) of the short fibers is preferably 5 to 100 ⁇ m, more preferably 10 to 50 ⁇ m.
- the average thickness (diameter) of the long fibers is preferably 10 to 500 ⁇ m, more preferably 15 to 200 ⁇ m.
- fibers can be either naturally derived natural fibers or organically synthesized synthetic fibers.
- naturally occurring natural fibers include cellulose, cotton fibers, and wool fibers. , Polypropylene, polyester and the like.
- inorganic fibers, such as carbon fiber and glass fiber can be used, asbestos fiber is not preferable in terms of environmental safety.
- the short fiber is a natural fiber and the long fiber is a synthetic fiber or a natural fiber because the water stoppage and the pumpability can be further improved in a balanced manner.
- the tail seal composition of the present invention contains detergents, dispersants, antiwear agents, oxidation agents, etc., which are generally used in lubricating oils and greases as necessary. Inhibitors, rust inhibitors, corrosion inhibitors, and the like can be added as appropriate. In particular, it is preferable to add 0.2 to 2% by mass of a fatty acid polyol ester or the like as a rust inhibitor, based on the total amount of the tail seal composition.
- the tail seal composition was prepared by mixing at the ratio (mass%) shown in Table 1, and the density (g / Cm 3 ) and immiscible penetration. The results are shown in Table 1.
- Base oil A2 polybutene, average molecular weight; 15,000 The kinematic viscosity (mm 2 / s) at 40 ° C. of each base oil is shown in Table 1.
- Fiber Fiber C1 Cotton fiber, average length: 1.8 mm, average diameter: 18 ⁇ m
- Fiber C2 Polystyrene terephthalate fiber, average length: 5 mm, average diameter: 20 ⁇ m
- Fibrous C3 cellulose fiber, average length: 3.0 mm, average diameter: 43 ⁇ m
- Tail Seal Composition 1 Water Resistant
- a water pressure resistance test was performed under the following conditions to measure the presence or absence of effluent water.
- a stainless steel pressure vessel having an inner diameter of 52 mm and a total of 16 openings (diameter 3 mm) was used at the center of the bottom part in 4 rows vertically and horizontally with a center interval of 5 mm.
- a stainless steel mesh (No. 50, thickness 0.85 mm) was placed on the opening, and 50 g of the tail seal composition prepared above was introduced.
- Tail Seal Composition 2 Pumpability
- the pumpability was evaluated by an apparent viscosity test defined in JISK2220. 300 g or more of the tail seal composition prepared above is packed in a cylinder, extruded through a capillary tube by hydraulic pressure, and the pressure generated in the system at this time is measured. The apparent viscosity was calculated using the Poiseuille equation and evaluated by the apparent viscosity at a shear rate of 1 sec ⁇ 1 (apparent viscosity of 10,000 Pa ⁇ s or less; ⁇ , 10,000 to 20,000 Pa ⁇ s; ⁇ , 20 1,000 Pa ⁇ s or more; x). The lower the value of the apparent viscosity, the smaller the pressure loss and the better the pumpability.
- Examples 1 to 7 containing polybutene at a predetermined ratio satisfy both the pumpability and water-stopping property at the same time, and among these, Examples 1 to 5 containing short fibers and long fibers at a predetermined ratio are particularly preferable. This composition is excellent in balance between pumpability and water stoppage.
- the tail seal composition of the present invention can sufficiently prevent water from entering the brush seal portion of the shield machine tail and can be easily pumped to the brush seal portion. It is useful as a tail seal composition.
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Abstract
Description
一方、シールド掘進機の後端で、未だ裏込剤が充填されていないトンネル内の空隙へは、地下水等が浸みだしており、この地下水のシールド掘進機内への侵入を防ぐため、シールド掘進機の末端にはシールド掘進機内のセグメントの外周とシールド掘進機の内周の間を止水するブラシシールが複数列、シールド掘進機の内周に設けられている。そして、その止水性を維持するために、これらのブラシシールの間にテールシール組成物が充填されている(例えば、特許文献1参照)。シールド掘進機の進行に伴い、ブラシシールのテールシール組成物は地山へ放散するため、ブラシシール部へのテールシール組成物の補充が必要となり、配管を通してテールシール組成物がポンプを用いて圧送される。 When excavating a tunnel into the ground with a shield machine, the shield machine advances while excavating ground in the direction of travel, and segments behind the shield machine are sequentially assembled as the inner wall of the tunnel. ing. In this case, the outer diameter of the tunnel to be excavated (excavation opening diameter) is the outer diameter of the shield machine, but since the segment is assembled inside the shield machine, the outer diameter of the segment is less than the inner diameter of the shield machine. Become. For this reason, a gap is formed between the outer diameter of the tunnel and the outer diameter of the segment behind the shield machine, and this gap is filled with a backing agent as the shield machine advances.
On the other hand, in the tunnel at the rear end of the shield machine that has not yet been filled with the backfill agent, groundwater and the like have oozed out. A plurality of rows of brush seals for stopping water between the outer circumference of the segment in the shield machine and the inner circumference of the shield machine are provided on the inner circumference of the shield machine. And in order to maintain the water stop, a tail seal composition is filled between these brush seals (see, for example, Patent Document 1). As the shield machine progresses, the tail seal composition of the brush seal diffuses to the ground, so it is necessary to replenish the brush seal with the tail seal composition, and the tail seal composition is pumped through the pipe using a pump. Is done.
(1)潤滑油基油15~60質量%、無機粉体30~70質量%および短繊維と長繊維とを含む繊維質2~10質量%を含有し、前記潤滑油基油が鉱油とポリブテンを質量比20:1~1:1の割合で含有するシールド掘進機用テールシール組成物。
(2)短繊維の平均長さが0.8~2.4mmで、長繊維の平均長さが含有する短繊維の平均長さの1.5~10倍であり、長繊維と短繊維の質量比が1:4~4:1である上記(1)に記載のシールド掘進機用テールシール組成物。
(3)鉱油の40℃における動粘度が100~3000mm2/sで、ポリブテンの数平均分子量が5,000~20,000である上記(1)に記載のシールド掘進機用テールシール組成物。
(4)無機粉体がタルクまたは炭酸カルシウムの少なくとも一種を含むものである上記(1)に記載のシールド掘進機用テールシール組成物。
(5)短繊維が天然繊維であり、長繊維が合成繊維または天然繊維である上記(1)に記載のシールド掘進機用テールシール組成物。 The present invention has been made based on such knowledge and is as follows.
(1) 15 to 60% by weight of a lubricating base oil, 30 to 70% by weight of inorganic powder, and 2 to 10% by weight of a fiber containing short fibers and long fibers, wherein the lubricating base oil contains mineral oil and polybutene Is a tail seal composition for a shield machine containing a mass ratio of 20: 1 to 1: 1.
(2) The average length of the short fibers is 0.8 to 2.4 mm, and the average length of the long fibers is 1.5 to 10 times the average length of the short fibers contained. The tail seal composition for a shield machine according to (1) above, wherein the mass ratio is 1: 4 to 4: 1.
(3) The tail seal composition for a shield machine according to (1) above, wherein the mineral oil has a kinematic viscosity at 40 ° C. of 100 to 3000 mm 2 / s and the polybutene has a number average molecular weight of 5,000 to 20,000.
(4) The tail seal composition for a shield machine according to the above (1), wherein the inorganic powder contains at least one of talc and calcium carbonate.
(5) The tail seal composition for a shield machine according to (1), wherein the short fibers are natural fibers and the long fibers are synthetic fibers or natural fibers.
さらに、本発明のシールド掘進機用テールシール組成物は実質的に水分を含まないものが好ましい。実質的に水分を含まないとは、不可避的に混入する水分を排除するものではないことを意味するが、水分含有量としては、テールシール組成物全量基準で、好ましくは、5質量%以下、より好ましくは、1質量%以下である。 The tail seal composition for a shield machine according to the present invention contains 15 to 60% by mass of a lubricating base oil, 30 to 70% by mass of inorganic powder, and 2 to 10% by mass of fiber. Preferably, it has a density of 1.1 to 1.8 g / cm 3 at 15 ° C. because of ease of pumping, water-stopping, stability when mixed with water, and oil retention at high temperatures. ˜1.5 g / cm 3 is more preferred, and 1.1 to 1.3 g / cm 3 is even more preferred. For the same reason, those having an immiscibility consistency of 150 to 350 are preferred, and 220 to 280 is more preferred. In addition, the measurement of the immiscible penetration referred to in the present invention is based on a method based on JISK2220.
Furthermore, it is preferable that the tail seal composition for a shield machine of the present invention is substantially free of moisture. The fact that it does not substantially contain water means that it does not exclude water inevitably mixed in, but the water content is preferably 5% by mass or less based on the total amount of the tail seal composition, More preferably, it is 1 mass% or less.
本発明の潤滑油基油は、鉱油とポリブテンを20:1~1:1の質量比で含有するものである。ポリブテンの繊維質に対する接着性と鉱油の流動性およびこの両者の親和性が相俟って圧送性と止水性を同時に向上させるものと推測される。この鉱油とポリブテンの含有割合が、前記範囲外であるとこれらの効果が低くなる。鉱油とポリブテンの含有割合は10:1~2:1が好ましく、5:1~3:1がより好ましい。
この潤滑油基油の物性としては、40℃における動粘度が100~3,000mm2/sのものが好ましく、550~1,500mm2/sがさらに好ましい。さらに、流動点は-10℃以下が好ましく、安全性の観点から、引火点は150℃以上が好ましい。
この潤滑油基油の含有量は、テールシール組成物全量基準で、15~60質量%であるが、好ましくは25~58質量%、より好ましくは35~57質量%である。 [Lubricant base oil]
The lubricating base oil of the present invention contains mineral oil and polybutene in a mass ratio of 20: 1 to 1: 1. It is presumed that the adhesiveness of polybutene to the fiber, the fluidity of mineral oil, and the affinity of both improve the pumpability and water stoppage at the same time. When the content ratio of the mineral oil and polybutene is outside the above range, these effects are lowered. The content ratio of mineral oil and polybutene is preferably 10: 1 to 2: 1, and more preferably 5: 1 to 3: 1.
The physical properties of the lubricating base oil are preferably those having a kinematic viscosity at 40 ° C. of 100 to 3,000 mm 2 / s, and more preferably 550 to 1,500 mm 2 / s. Further, the pour point is preferably −10 ° C. or lower, and the flash point is preferably 150 ° C. or higher from the viewpoint of safety.
The content of the lubricating base oil is 15 to 60% by mass, preferably 25 to 58% by mass, more preferably 35 to 57% by mass, based on the total amount of the tail seal composition.
この鉱油は、取り扱いの安全上の観点から芳香族分が20%以下のものが好ましい。 The mineral oil used as the lubricating base oil can be a commercially available mineral oil-based lubricating oil or a mineral oil-based lubricating base oil that is a base oil. These are usually obtained by subjecting a distillate obtained by subjecting crude oil to atmospheric distillation, or further distilling the distillation residue under reduced pressure, as a base oil as a base oil, Alternatively, it is prepared by blending various additives and the like. The refining process includes hydrorefining, solvent extraction, solvent dewaxing, hydrodewaxing, sulfuric acid washing, clay treatment, etc., and these are combined in an appropriate order for treatment, thereby providing a mineral oil-based lubrication suitable for the present invention. An oil base oil can be obtained. A mixture of a plurality of refined oils having different properties obtained by using different crude oils or distillate oils by different process combinations and sequences can also be used as suitable mineral oils.
This mineral oil preferably has an aromatic content of 20% or less from the viewpoint of handling safety.
本発明の無機粉体としては、珪素、アルミニウム、マグネシウム、カルシウム等の酸化物、水酸化物、炭酸塩、硫酸塩等の粉体を用いることができ、さらにこれらの混合物、及び、天然に産するこれらの化合物を主成分とする鉱石の粉体等も用いることができる。具体的には、タルク、炭酸カルシウム、炭酸マグネシウム、硫酸カルシウム、水酸化アルミニウム、酸化マグネシウム、酸化カルシウム、酸化アルミニウム、シリカ、ベントナイト、珪藻土など、特にはタルクまたは炭酸カルシウムの粉体が好適である。これらの無機粉体は、一種類でも複数の種類を混合して用いてもよい。
上記無機粉体は、平均粒径が0.5~500μmのものが好ましく、5~50μmのものがより好ましい。この無機粉体の含有量は、テールシール組成物全量基準で、30~70質量%であり、35~60質量%が好ましい。 [Inorganic powder]
As the inorganic powder of the present invention, oxides such as silicon, aluminum, magnesium and calcium, hydroxides, carbonates, sulfates and the like can be used, and a mixture thereof and a naturally produced powder can be used. Ore powders containing these compounds as main components can also be used. Specifically, talc, calcium carbonate, magnesium carbonate, calcium sulfate, aluminum hydroxide, magnesium oxide, calcium oxide, aluminum oxide, silica, bentonite, diatomaceous earth, and the like, particularly talc or calcium carbonate powder are suitable. These inorganic powders may be used alone or as a mixture of a plurality of types.
The inorganic powder preferably has an average particle size of 0.5 to 500 μm, more preferably 5 to 50 μm. The content of the inorganic powder is 30 to 70% by mass, preferably 35 to 60% by mass, based on the total amount of the tail seal composition.
この増ちょう剤の含有量は、テールシール組成物全量基準で、0.1~10質量%が好ましく、0.2~5質量%がより好ましい。 Furthermore, it is necessary to adjust the tail seal composition to a suitable consistency, and it is used as a thickener in grease, etc., as a thickening agent for metal soap, urea thickener, organic polymer. It is preferable to use a thickener in combination.
The content of the thickener is preferably 0.1 to 10% by mass, more preferably 0.2 to 5% by mass, based on the total amount of the tail seal composition.
繊維質は、シールド掘進機のテールシール部にある金属網や金属線を束ねたブラシに絡みつき、潤滑油基油、増ちょう剤とともに止水性のある濾布層を形成するために用いられる。繊維質は、テールシール組成物全量基準で、2~10質量%、好ましくは3~8質量%含有する。
この繊維質は、止水性と圧送性をバランスよく向上させるために、短繊維と長繊維とを含むものである。短繊維の平均長さが0.8~2.4mmであり、好ましくは1.0~2.0mmである。長繊維の平均長さは、使用する短繊維の平均長さの1.5~10倍であり、好ましくは1.6~7倍のものである。含有する長繊維と短繊維の質量比は1:4~4:1であり、好ましくは1:2~2:1である。短繊維の平均太さ(直径)は5~100μmのものが好ましく、10~50μmがより好ましい。長繊維の平均太さ(直径)は10~500μmが好ましく、15~200μmがより好ましい。 [Fiber]
The fiber is entangled with a brush that bundles metal nets and metal wires in the tail seal part of the shield machine, and is used to form a filter cloth layer having water-stopper together with a lubricant base oil and a thickener. The fiber content is 2 to 10% by mass, preferably 3 to 8% by mass, based on the total amount of the tail seal composition.
This fiber contains short fibers and long fibers in order to improve the water-stopping property and pumpability in a balanced manner. The average length of the short fibers is 0.8 to 2.4 mm, preferably 1.0 to 2.0 mm. The average length of the long fibers is 1.5 to 10 times the average length of the short fibers used, and preferably 1.6 to 7 times. The mass ratio of long fibers to short fibers contained is 1: 4 to 4: 1, preferably 1: 2 to 2: 1. The average thickness (diameter) of the short fibers is preferably 5 to 100 μm, more preferably 10 to 50 μm. The average thickness (diameter) of the long fibers is preferably 10 to 500 μm, more preferably 15 to 200 μm.
なお、短繊維が天然繊維で、長繊維が合成繊維または天然繊維であると、さらに止水性と圧送性をバランスよく向上させることができ好ましい。 These fibers can be either naturally derived natural fibers or organically synthesized synthetic fibers. For example, naturally occurring natural fibers include cellulose, cotton fibers, and wool fibers. , Polypropylene, polyester and the like. Moreover, although inorganic fibers, such as carbon fiber and glass fiber, can be used, asbestos fiber is not preferable in terms of environmental safety.
In addition, it is preferable that the short fiber is a natural fiber and the long fiber is a synthetic fiber or a natural fiber because the water stoppage and the pumpability can be further improved in a balanced manner.
本発明のテールシール組成物には、上記成分以外に、必要に応じて、一般に潤滑油やグリースなどに用いられている、清浄剤、分散剤、摩耗防止剤、酸化防止剤、さび止め剤、腐食防止剤などを適宜添加することができる。特には、さび止め剤として、脂肪酸ポリオールエステルなどを、テールシール組成物全量基準で、0.2~2質量%添加することが好ましい。 [D] Other Additives In addition to the above components, the tail seal composition of the present invention contains detergents, dispersants, antiwear agents, oxidation agents, etc., which are generally used in lubricating oils and greases as necessary. Inhibitors, rust inhibitors, corrosion inhibitors, and the like can be added as appropriate. In particular, it is preferable to add 0.2 to 2% by mass of a fatty acid polyol ester or the like as a rust inhibitor, based on the total amount of the tail seal composition.
〔テールシール組成物の成分〕
A.潤滑油基油
基油A1:鉱油(JX日鉱日石エネルギー社製、溶剤精製潤滑油基油、15℃の密度0.90g/cm3、40℃の動粘度が500mm2/s)
基油A2:ポリブテン、平均分子量;15,000
なお、上記各基油の40℃における動粘度(mm2/s)を表1に示した。
B.無機粉体、増ちょう剤
無機粉体B1:タルク、平均粒径;20μm
無機粉体B2:炭酸カルシウム、平均粒径;10μm
増ちょう剤B3:Liステアリン酸石けん(関東化学社製試薬) Using the following lubricating base oil, inorganic powder, thickener, and fiber, the tail seal composition was prepared by mixing at the ratio (mass%) shown in Table 1, and the density (g / Cm 3 ) and immiscible penetration. The results are shown in Table 1.
[Components of tail seal composition]
A. Lubricating base oil Base oil A1: Mineral oil (manufactured by JX Nippon Oil & Energy, solvent refined lubricating base oil, density of 0.90 g / cm 3 at 15 ° C., kinematic viscosity at 40 ° C. of 500 mm 2 / s)
Base oil A2: polybutene, average molecular weight; 15,000
The kinematic viscosity (mm 2 / s) at 40 ° C. of each base oil is shown in Table 1.
B. Inorganic powder, thickener Inorganic powder B1: Talc, average particle size: 20 μm
Inorganic powder B2: calcium carbonate, average particle size: 10 μm
Thickener B3: Li stearic acid soap (reagent manufactured by Kanto Chemical Co., Inc.)
繊維質C1:綿繊維、平均長さ;1.8mm、平均直径;18μm
繊維質C2:ポリエスチレンテレフタレート繊維、平均長さ;5mm、平均直径;20μm
繊維質C3:セルロース繊維、平均長さ;3.0mm、平均直径;43μm C. Fiber Fiber C1: Cotton fiber, average length: 1.8 mm, average diameter: 18 μm
Fiber C2: Polystyrene terephthalate fiber, average length: 5 mm, average diameter: 20 μm
Fibrous C3: cellulose fiber, average length: 3.0 mm, average diameter: 43 μm
次に示す条件で耐水圧試験を行い、流出水の有無を測定した。
底部中央部に、中心間隔5mmで縦横に4列、合計16個の開口(直径3mm)を有する内径52mmのステンレス製の圧力容器を用いた。開口上にステンレス製のメッシュ(50番、厚み0.85mm)を載せ、上記で調製したテールシール組成物50gを導入した。テールシール組成物上に水(10g)を置き、空気で35kgf/cm2の圧力で5分間加圧し、その際の底部開口からの水の流出有無により止水性の評価(水の流出、無し;○、僅か有り;△、かなり有り;×)を行った。この結果を表1に示した。
この結果、無機粉体が少ない比較例3は、止水性がないことが分かる。 [Evaluation of Tail Seal Composition 1: Water Resistant]
A water pressure resistance test was performed under the following conditions to measure the presence or absence of effluent water.
A stainless steel pressure vessel having an inner diameter of 52 mm and a total of 16 openings (diameter 3 mm) was used at the center of the bottom part in 4 rows vertically and horizontally with a center interval of 5 mm. A stainless steel mesh (No. 50, thickness 0.85 mm) was placed on the opening, and 50 g of the tail seal composition prepared above was introduced. Water (10 g) was placed on the tail seal composition, pressurized with air at a pressure of 35 kgf / cm 2 for 5 minutes, and the water stoppage was evaluated by the presence or absence of water outflow from the bottom opening (no outflow of water; no; ○, slight presence; Δ, considerable presence; x). The results are shown in Table 1.
As a result, it can be seen that Comparative Example 3 with a small amount of inorganic powder has no water-stopping property.
JISK2220に定められている見掛け粘度試験にて圧送性を評価した。上記で調製したテールシール組成物300g以上をシリンダに詰め、油圧によって毛管を通して押し出し、このとき系統内に発生する圧力を測定する。ポアズイユの式を用いて見掛け粘度を算出し、せん断率1sec-1のときの見掛け粘度で評価した(見かけ粘度10,000Pa・s以下;○、10,000~20,000Pa・s;△、20,000Pa・s以上;×)。この見かけ粘度の数値は低いほど、圧力損失が少なく、圧送性に優れる。この結果を表1に示した。
この結果、所定の割合でポリブテンを含有する実施例1~7は圧送性と止水性を同時に満足するが、このうちでも特に、短繊維と長繊維を所定の割合で含有する実施例1~5の組成物は、圧送性と止水性ともにバランスよく優れている。 [Evaluation of Tail Seal Composition 2: Pumpability]
The pumpability was evaluated by an apparent viscosity test defined in JISK2220. 300 g or more of the tail seal composition prepared above is packed in a cylinder, extruded through a capillary tube by hydraulic pressure, and the pressure generated in the system at this time is measured. The apparent viscosity was calculated using the Poiseuille equation and evaluated by the apparent viscosity at a shear rate of 1 sec −1 (apparent viscosity of 10,000 Pa · s or less; ○, 10,000 to 20,000 Pa · s; Δ, 20 1,000 Pa · s or more; x). The lower the value of the apparent viscosity, the smaller the pressure loss and the better the pumpability. The results are shown in Table 1.
As a result, Examples 1 to 7 containing polybutene at a predetermined ratio satisfy both the pumpability and water-stopping property at the same time, and among these, Examples 1 to 5 containing short fibers and long fibers at a predetermined ratio are particularly preferable. This composition is excellent in balance between pumpability and water stoppage.
Claims (5)
- 潤滑油基油15~60質量%、無機粉体30~70質量%、および短繊維と長繊維とを含む繊維質2~10質量%を含有し、前記潤滑油基油が鉱油とポリブテンを質量比20:1~1:1で含有するシールド掘進機用テールシール組成物。 Lubricant base oil 15 to 60% by mass, inorganic powder 30 to 70% by mass, and fiber containing 2 to 10% by mass including short fibers and long fibers, and the lubricant base oil contains mineral oil and polybutene A tail seal composition for a shield machine containing a ratio of 20: 1 to 1: 1.
- 短繊維の平均長さが0.8~2.4mmで、長繊維の平均長さが含有する短繊維の平均長さの1.5~10倍であり、長繊維と短繊維の質量比が1:4~4:1である請求項1に記載のシールド掘進機用テールシール組成物。 The average length of the short fibers is 0.8 to 2.4 mm, the average length of the long fibers is 1.5 to 10 times the average length of the short fibers contained, and the mass ratio of the long fibers to the short fibers is The tail seal composition for a shield machine according to claim 1, wherein the ratio is 1: 4 to 4: 1.
- 鉱油の40℃における動粘度が100~3000mm2/sで、ポリブテンの数平均分子量が5,000~20,000である請求項1に記載のシールド掘進機用テールシール組成物。 Kinematic viscosity at 40 ° C. in mineral oil is 100 ~ 3000mm 2 / s, a shield machine for tail sealing composition according to claim 1 the number average molecular weight of polybutene of 5,000 to 20,000.
- 無機粉体がタルクまたは炭酸カルシウムの少なくとも一種を含むものである請求項1に記載のシールド掘進機用テールシール組成物。 The tail seal composition for a shield machine according to claim 1, wherein the inorganic powder contains at least one of talc and calcium carbonate.
- 短繊維が天然繊維であり、長繊維が合成繊維または天然繊維である請求項1に記載のシールド掘進機用テールシール組成物。 The tail seal composition for a shield machine according to claim 1, wherein the short fibers are natural fibers and the long fibers are synthetic fibers or natural fibers.
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CN106906031A (en) * | 2017-03-09 | 2017-06-30 | 中铁第五勘察设计院集团有限公司 | A kind of high water pressure resistant shield tail seal grease of shield and preparation method thereof |
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