CN115207830A - Grouting plugging method for through hole of cable conduit - Google Patents
Grouting plugging method for through hole of cable conduit Download PDFInfo
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- CN115207830A CN115207830A CN202110376274.0A CN202110376274A CN115207830A CN 115207830 A CN115207830 A CN 115207830A CN 202110376274 A CN202110376274 A CN 202110376274A CN 115207830 A CN115207830 A CN 115207830A
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- component
- flame
- cable
- plugging
- retardant
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- 238000000034 method Methods 0.000 title claims abstract description 28
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- 239000003063 flame retardant Substances 0.000 claims abstract description 75
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- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 3
- ZTVDQDQXXMXXIC-UHFFFAOYSA-N [Sb]=O.[Si]=O Chemical compound [Sb]=O.[Si]=O ZTVDQDQXXMXXIC-UHFFFAOYSA-N 0.000 claims description 3
- 239000012752 auxiliary agent Substances 0.000 claims description 3
- 235000005687 corn oil Nutrition 0.000 claims description 3
- 239000002285 corn oil Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 3
- 239000000347 magnesium hydroxide Substances 0.000 claims description 3
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 3
- 239000003921 oil Substances 0.000 claims description 3
- 235000019198 oils Nutrition 0.000 claims description 3
- 229920001228 polyisocyanate Polymers 0.000 claims description 3
- 239000005056 polyisocyanate Substances 0.000 claims description 3
- 229920006389 polyphenyl polymer Polymers 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 235000020238 sunflower seed Nutrition 0.000 claims description 3
- MSLRPWGRFCKNIZ-UHFFFAOYSA-J tetrasodium;hydrogen peroxide;dicarbonate Chemical compound [Na+].[Na+].[Na+].[Na+].OO.OO.OO.[O-]C([O-])=O.[O-]C([O-])=O MSLRPWGRFCKNIZ-UHFFFAOYSA-J 0.000 claims description 3
- 239000012974 tin catalyst Substances 0.000 claims description 3
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 abstract description 3
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Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/14—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
- B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/36—Hydroxylated esters of higher fatty acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/06—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
- H02G1/08—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle through tubing or conduit, e.g. rod or draw wire for pushing or pulling
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2101/00—Manufacture of cellular products
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention relates to a grouting plugging method for a through hole of a cable conduit, and belongs to the technical field of pipeline plugging application. The invention is formed independently, mechanical construction equipment is not needed when the invention is used, only a film is needed to temporarily plug the surface of the cable pipeline, and then the flame-retardant foaming material is injected into the cable pipeline through the two-component grouting gun, thus being convenient and fast. The flame-retardant foaming material has excellent permeability and good bonding property with cables and rock soil, and meets the requirements of quick and efficient plugging when irregular cavities of cable pipelines and a plurality of cables are contained in the pipelines. The flame-retardant foaming material has large expansion factor, quick solidification time and adjustable solidification strength, and meets the permanent or semi-permanent sealing requirement of the cable pipeline.
Description
Technical Field
The invention relates to a grouting plugging method for a through hole of a cable conduit, and belongs to the technical field of pipeline plugging application.
Background
In order to beautify urban environment and enhance communication power transmission capability, direct pipeline burying has become a main way for cable laying. The cable is laid underground and daily maintenance relates to the requirements of fire prevention, water prevention, small animal entry prevention and the like, so that holes between the cable pipe and the cable need to be plugged, and the reasonable plugging method can effectively improve the safety and prolong the service life of the cable.
The traditional plugging mode is to use red mud or mortar for plugging. The plugging is carried out by red mud or mortar, the cost is low, but the water seepage and the air permeability are easy, the durability is poor, the service life is short, and plugging materials are difficult to remove in the later cable maintenance process. In order to solve the problem, patents CN207166112U, CN209767055U, CN110048349A, CN209767121U, and CN110048360A disclose a kind of integrated occluder, which adopts the principle of occluding by utilizing the compression deformability of high elastic materials such as silicone rubber, etc., and the gap between the cable and the pipeline wall is squeezed by tightening the bolts, thereby achieving the effect of sealing. But the split type plugging device is mainly used for plugging the pipe diameter of a cable pipe within the range of 50-110 mm. When the diameter of the cable pipe is larger than 110mm, the split type plugging device cannot be installed due to the fact that the cable pipe is too heavy; when the cable pipe diameter is less than 50mm, constructor does not have sufficient operating space, and split type plugging device also can't install. The expansion plugging bag prepared from the flame-retardant foaming material is used for sealing a cable pipeline, is a convenient plugging technology newly developed at present, and only needs to be stuck on a cable under the conditions of small diameter of a cable pipe and narrow construction environment, and the material in the plugging bag is foamed and cured through self rapid reaction to fill a cavity, so that the sealing effect is achieved. However, when the diameter of the cable pipe is larger than 110mm, the cable pipeline is sunk at the bottom of the pipeline, the shape of a cavity of the pipeline is asymmetric, the whole cavity is difficult to be uniformly distributed in the material reaction expansion process, the phenomenon of incomplete cavity plugging is easy to occur, secondary reworking is needed, particularly when a plurality of cables are arranged in one cable pipe, the plugging material cannot timely burst the plugging bag to flow out, gaps among the cables are difficult to seal, and the sealing effect is greatly reduced.
Disclosure of Invention
The invention aims to provide a method for plugging through holes of a cable tube by grouting, which is convenient and quick to operate, excellent in sealing effect and wide in application range, and the grouting plugging material has excellent flame-retardant insulating property, adjustable foaming times of 5-15 times and adjustable foaming body strength and can meet permanent or semi-permanent quick plugging requirements of different cable projects.
In order to achieve the effect, the invention adopts the following technical scheme:
a slip casting plugging method for a through hole of a cable pipe, wherein raw materials and tools used by the slip casting plugging method comprise a two-component slip casting gun, a quick-setting flame-retardant foaming material, a film and an adhesive tape; the film is also a thin layer material;
the quick-setting flame-retardant foaming material comprises a component A and a component B;
the inner cavity of the two-component grouting gun is divided into two parts, namely a cavity A and a cavity B; the cavity A is filled with the component A of the quick-setting flame-retardant foaming material, and the cavity B is filled with the component B of the quick-setting flame-retardant foaming material;
the method comprises the following steps:
firstly, when a cable pipeline needs to be plugged, cutting a film according to the shape and the size of a cable so that the film can penetrate through the cable;
secondly, tearing the adhesive tape release paper, and bonding the cut film on the surface of the cable duct;
thirdly, pouring a quick-setting flame-retardant foaming material component A into a cavity A of the two-component grouting gun, and quickly setting a flame-retardant foaming material component B into a cavity B of the two-component grouting gun;
fourthly, a small hole is formed in the surface of the bonded film through scissors, and the mixed quick-setting flame-retardant foaming material A component and the mixed quick-setting flame-retardant foaming material B component are injected into the cable pipeline through the small hole by using a two-component grouting gun;
fifthly, after the component A of the quick-setting flame-retardant foaming material and the component B of the quick-setting flame-retardant foaming material are cured for 10-15s, starting to perform foaming reaction, wherein the complete solidification time is 1-3min, and after the solidification is finished, completing the cable plugging.
The component A of the quick-setting flame-retardant foaming material contains 60-90 parts by weight of polymeric MDI and 10-40 parts by weight of vegetable oil or modified vegetable oil;
the component B comprises 10-40 parts by weight of polyether polyol, 10-20 parts by weight of polymer polyol, 2-6 parts by weight of catalyst, 1-10 parts by weight of flame retardant, 10-20 parts by weight of auxiliary agent, 10-30 parts by weight of vegetable oil or modified vegetable oil, 2-3 parts by weight of air entraining agent and 2-3 parts by weight of reactive chemical foaming agent;
wherein the vegetable oil or modified vegetable oil in the component A and the component B is selected from one or more of soybean oil, palm oil, grass sesame oil, corn oil, sunflower seed oil, oleate and epoxidized soybean oil.
The polymeric MDI described in component A is a mixture of MDI diphenylmethane diisocyanate and polyphenyl polymethylene polyisocyanate.
The viscosity of the polymeric MDI is 200-300mPa.s, and the mass content of-NCO is 29-31.5%.
The polyether polyol in the component B is selected from polyether diol or polyether triol.
The polymer polyol in the component B is copolyol POP.
The flame retardant in the component B is a novel halogen-free phosphorus-free flame retardant.
The novel halogen-free phosphorus-free flame retardant is a composite system flame retardant formed by mixing silicon carbide or simple substance carbon and a metal powder flame retardant; or the novel halogen-free phosphorus-free flame retardant is a composite system flame retardant formed by mixing silicon carbide or simple substance carbon, gas phase silicon dioxide and metal powder flame retardant.
The simple substance carbon is graphite, modified graphite or graphene; the metal powder flame retardant is one or a mixture of more of aluminum hydroxide powder, magnesium oxide powder, magnesium hydroxide powder and antimony oxide-silicon oxide powder.
The catalyst is selected from one or a mixture of more of triethylene diamine, diether and analogues thereof, cyclohexyl methyl tertiary amine, dimethylamino tertiary amine, piperazine catalyst, morpholine catalyst, triethylamine, triethanolamine, triethylene diamine, organic lead catalyst, organic tin catalyst, organic potassium catalyst, zinc carboxylate catalyst and titanate catalyst.
The air entraining agent is obtained by compounding two or three of a vegetable protein foaming agent, an animal protein foaming agent and a rosin air entraining agent, and preferably compounding the vegetable protein foaming agent and the animal protein foaming agent.
The reactive chemical foaming agent is one or a mixture of more of inorganic powder foaming agents such as aluminum powder, sodium carbonate peroxide and the like, and preferably aluminum powder.
The film is made of silicon rubber, and the thickness of the film is 0.2-0.5mm.
The adhesive tape consists of two parts of adhesive and isolating paper and is placed on the back of the film, the isolating paper is torn off when the adhesive tape is used, and the cut film is bonded on the surface of the cable pipeline.
Compared with the prior art, the invention has the following beneficial effects:
the invention is independently formed, does not need mechanical construction equipment when in use, only needs to temporarily plug the surface of the cable pipeline by using a film, and then injects the flame-retardant foaming material into the cable pipeline through a two-component grouting gun, thus being convenient and fast. The flame-retardant foam material has excellent permeability and good bonding property with cables and rock soil, and meets the requirements of quick and efficient plugging of irregular cavities of cable pipelines and the condition that a plurality of cables are contained in the pipelines. The flame-retardant foaming material has large expansion factor, quick solidification time and adjustable solidification strength, and meets the permanent or semi-permanent sealing requirement of the cable pipeline.
Drawings
FIG. 1 is a schematic structural view of a two-component grouting gun according to the present invention;
FIG. 2 is a flow chart of the grouting plugging process of the invention.
Detailed Description
The technical scheme of the invention is further explained.
A slip casting plugging method for a through hole of a cable pipe, wherein raw materials and tools used by the slip casting plugging method comprise a two-component slip casting gun, a quick-setting flame-retardant foaming material, a film and an adhesive tape; the film is also a thin layer material;
the quick-setting flame-retardant foaming material comprises a component A and a component B;
the inner cavity of the two-component grouting gun is divided into two parts, namely a cavity A and a cavity B; the cavity A is filled with the component A of the quick-setting flame-retardant foaming material, and the cavity B is filled with the component B of the quick-setting flame-retardant foaming material;
the method comprises the following steps:
firstly, when a cable pipeline needs to be plugged, cutting a film according to the shape and the size of a cable so that the film can penetrate through the cable;
secondly, tearing the adhesive tape release paper, and bonding the cut film on the surface of the cable duct;
thirdly, pouring a quick-setting flame-retardant foaming material component A into a cavity A of the two-component grouting gun, and quickly setting a flame-retardant foaming material component B into a cavity B of the two-component grouting gun;
fourthly, a small hole is formed in the surface of the bonded thin film through scissors, and a mixed quick-setting flame-retardant foaming material A component and a mixed quick-setting flame-retardant foaming material B component are injected into the cable pipeline through the small hole by using a two-component grouting gun;
fifthly, after the component A of the quick-setting flame-retardant foaming material and the component B of the quick-setting flame-retardant foaming material are cured for 10-15s, starting to perform foaming reaction, wherein the complete solidification time is 1-3min, and after the solidification is finished, completing the cable plugging.
The component A of the quick-setting flame-retardant foaming material contains 60-90 parts by weight of polymeric MDI and 10-40 parts by weight of vegetable fat or modified vegetable fat;
the component B comprises 10-40 parts by weight of polyether polyol, 10-20 parts by weight of polymer polyol, 2-6 parts by weight of catalyst, 1-10 parts by weight of flame retardant, 10-20 parts by weight of auxiliary agent, 10-30 parts by weight of vegetable oil or modified vegetable oil, 2-3 parts of air entraining agent and 2-3 parts of reactive chemical foaming agent;
wherein the vegetable oil or modified vegetable oil in the component A and the component B is selected from one or more of soybean oil, palm oil, grass sesame oil, corn oil, sunflower seed oil, oleate and epoxidized soybean oil.
The polymeric MDI in component A is a mixture of MDI diphenylmethane diisocyanate and polyphenyl polymethylene polyisocyanate.
The viscosity of the polymeric MDI is 200-300mPa.s, and the mass content of-NCO is 29-31.5%.
The polyether polyol in the component B is selected from polyether diol or polyether triol.
The polymer polyol in the component B is copolyol POP.
The flame retardant in the component B is a novel halogen-free phosphorus-free flame retardant.
The novel halogen-free phosphorus-free flame retardant is a composite system flame retardant formed by mixing silicon carbide or simple substance carbon and a metal powder flame retardant; or the novel halogen-free phosphorus-free flame retardant is a composite system flame retardant formed by mixing silicon carbide or simple substance carbon, gas-phase silicon dioxide and a metal powder flame retardant.
The simple substance carbon is graphite, modified graphite or graphene; the metal powder flame retardant is one or a mixture of more of aluminum hydroxide powder, magnesium oxide powder, magnesium hydroxide powder and antimony oxide-silicon oxide powder.
The catalyst is selected from one or a mixture of more of triethylene diamine, diether and analogues thereof, cyclohexyl methyl tertiary amine, dimethylamino tertiary amine, piperazine catalyst, morpholine catalyst, triethylamine, triethanolamine, triethylene diamine, organic lead catalyst, organic tin catalyst, organic potassium catalyst, zinc carboxylate catalyst and titanate catalyst.
The air entraining agent is obtained by compounding two or three of a vegetable protein foaming agent, an animal protein foaming agent and a rosin air entraining agent, and preferably compounding the vegetable protein foaming agent and the animal protein foaming agent.
The reactive chemical foaming agent is one or a mixture of more of inorganic powder foaming agents such as aluminum powder and sodium carbonate peroxide, and preferably aluminum powder.
The film is made of silicon rubber, and the thickness of the film is 0.2-0.5mm.
The adhesive tape consists of an adhesive and a piece of isolation paper, is arranged on the back of the film, and is used by tearing the isolation paper and bonding the cut film on the surface of the cable duct.
The invention is further illustrated by the following examples in conjunction with the drawings.
Examples
As shown in figures 1 and 2, the grouting plugging method for the through hole of the cable conduit comprises a two-component grouting gun, a quick-setting flame-retardant foaming material, a film and an adhesive tape.
The quick-setting flame-retardant foaming material consists of a component A and a component B;
the component A contains 75 parts by weight of polymeric MDI, 13 parts by weight of palm oil and 12 parts by weight of oleate;
the component B comprises 30 parts by weight of polyether diol, 10 parts by weight of polyether triol, 20 parts by weight of polymer polyol POP,12 parts by weight of grass sesame oil, 3 parts by weight of organic lead catalyst (lead triacetate), 2 parts by weight of aluminum hydroxide powder, 3 parts by weight of modified graphite powder, 2.5 parts by weight of vegetable protein foaming agent, 1.5 parts by weight of animal protein foaming agent, 1 part by weight of aluminum powder and 10 parts by weight of water.
When a cable pipeline needs to be plugged, firstly, a film is cut according to the shape and the size of a cable, so that the film can penetrate through the cable; then tearing the adhesive tape release paper, and bonding the cut film on the surface of the cable duct; and finally, forming a small hole on the surface of the bonded film by using scissors, and injecting the flame-retardant foaming material into the cable pipeline through the small hole by using a two-component grouting gun. After grouting is finished for 5min, the film can be recycled for continuous use.
The quick setting flame retardant foam material prepared in this example was tested according to the AQ1089 standard, and the test performance is shown in table 1.
TABLE 1
Claims (10)
1. A grouting and plugging method for a through hole of a cable conduit is characterized by comprising the following steps: the grouting plugging method uses raw materials and tools comprising a two-component grouting gun, a quick-setting flame-retardant foaming material, a film and an adhesive tape;
the quick-setting flame-retardant foaming material comprises a component A and a component B;
the inner cavity of the two-component grouting gun is divided into two parts, namely a cavity A and a cavity B; the cavity A is filled with the component A of the quick-setting flame-retardant foaming material, and the cavity B is filled with the component B of the quick-setting flame-retardant foaming material;
the method comprises the following steps:
firstly, when a cable pipeline needs to be plugged, cutting a film according to the shape and size of a cable so that the film can penetrate through the cable;
secondly, tearing the adhesive tape release paper, and bonding the cut film on the surface of the cable duct;
thirdly, pouring a quick-setting flame-retardant foaming material component A into a cavity A of the two-component grouting gun, and quickly setting a flame-retardant foaming material component B into a cavity B of the two-component grouting gun;
fourthly, forming a small hole on the surface of the film, and injecting the mixed quick-setting flame-retardant foaming material component A and the mixed quick-setting flame-retardant foaming material component B into the cable pipeline through the small hole by using a two-component grouting gun;
fifthly, after the component A of the quick-setting flame-retardant foaming material and the component B of the quick-setting flame-retardant foaming material are cured for 10-15s, starting to perform foaming reaction, wherein the complete solidification time is 1-3min, and after the solidification is finished, completing the cable plugging.
2. The method for plugging the through hole of the cable conduit according to claim 1, wherein: the component A of the quick-setting flame-retardant foaming material contains 60-90 parts by weight of polymeric MDI and 10-40 parts by weight of vegetable oil or modified vegetable oil;
the component B comprises 10-40 parts by weight of polyether polyol, 10-20 parts by weight of polymer polyol, 2-6 parts by weight of catalyst, 1-10 parts by weight of flame retardant, 10-20 parts by weight of auxiliary agent, 10-30 parts by weight of vegetable oil or modified vegetable oil, 2-3 parts by weight of air entraining agent and 2-3 parts by weight of reactive chemical foaming agent.
3. The method for plugging the through hole of the cable conduit according to claim 2, wherein: the vegetable oil or modified vegetable oil in the component A and the component B is selected from one or more of soybean oil, palm oil, grass sesame oil, corn oil, sunflower seed oil, oleate and epoxidized soybean oil.
4. The method for plugging the through hole of the cable conduit according to claim 2, wherein: the polymeric MDI in component A is a mixture of MDI diphenylmethane diisocyanate and polyphenyl polymethylene polyisocyanate.
5. The method for plugging the through hole of the cable conduit according to claim 2, wherein: the viscosity of the polymeric MDI is 200-300mPa.s, and the mass content of-NCO is 29-31.5%.
6. The method for plugging the through hole of the cable conduit according to claim 2, wherein: the polyether polyol in the component B is selected from polyether diol or polyether triol;
the polymer polyol in the component B is copolyol POP;
the flame retardant in the component B is a novel halogen-free phosphorus-free flame retardant.
7. The method for plugging the through hole of the cable conduit according to claim 6, wherein: the novel halogen-free phosphorus-free flame retardant is a composite system flame retardant formed by mixing silicon carbide or simple substance carbon and a metal powder flame retardant; or the novel halogen-free phosphorus-free flame retardant is a composite system flame retardant formed by mixing silicon carbide or simple substance carbon, gas phase silicon dioxide and metal powder flame retardant.
8. The method for plugging the through hole of the cable conduit according to claim 7, wherein: the simple substance carbon is graphite, modified graphite or graphene; the metal powder flame retardant is one or a mixture of more of aluminum hydroxide powder, magnesium oxide powder, magnesium hydroxide powder and antimony oxide-silicon oxide powder.
9. The method for plugging the through hole of the cable conduit according to claim 7, wherein: the catalyst is selected from one or a mixture of more of triethylene diamine, diether and analogues thereof, cyclohexyl methyl tertiary amine, dimethylamino tertiary amine, piperazine catalyst, morpholine catalyst, triethylamine, triethanolamine, triethylene diamine, organic lead catalyst, organic tin catalyst, organic potassium catalyst, zinc carboxylate catalyst and titanate catalyst.
10. The method for plugging the through hole of the cable conduit according to claim 7, wherein: the air entraining agent is obtained by compounding two or three of a vegetable protein foaming agent, an animal protein foaming agent and a rosin air entraining agent, and the reactive chemical foaming agent is selected from aluminum powder or sodium carbonate peroxide.
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Application publication date: 20221018 |