CN115071219B - High-rigidity high-insulation composite sleeve and manufacturing method thereof - Google Patents
High-rigidity high-insulation composite sleeve and manufacturing method thereof Download PDFInfo
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- CN115071219B CN115071219B CN202210745633.XA CN202210745633A CN115071219B CN 115071219 B CN115071219 B CN 115071219B CN 202210745633 A CN202210745633 A CN 202210745633A CN 115071219 B CN115071219 B CN 115071219B
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- 238000009413 insulation Methods 0.000 title claims abstract description 47
- 239000002131 composite material Substances 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 239000002245 particle Substances 0.000 claims abstract description 142
- 229920001971 elastomer Polymers 0.000 claims abstract description 121
- 239000004744 fabric Substances 0.000 claims abstract description 98
- 239000010451 perlite Substances 0.000 claims abstract description 91
- 235000019362 perlite Nutrition 0.000 claims abstract description 91
- 239000003822 epoxy resin Substances 0.000 claims abstract description 74
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 74
- 239000003365 glass fiber Substances 0.000 claims abstract description 49
- AOBIOSPNXBMOAT-UHFFFAOYSA-N 2-[2-(oxiran-2-ylmethoxy)ethoxymethyl]oxirane Chemical compound C1OC1COCCOCC1CO1 AOBIOSPNXBMOAT-UHFFFAOYSA-N 0.000 claims abstract description 48
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 47
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 47
- 239000000853 adhesive Substances 0.000 claims abstract description 34
- 230000001070 adhesive effect Effects 0.000 claims abstract description 34
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000000835 fiber Substances 0.000 claims abstract description 27
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 27
- 239000004800 polyvinyl chloride Substances 0.000 claims abstract description 16
- 229920000915 polyvinyl chloride Polymers 0.000 claims abstract description 16
- 239000004156 Azodicarbonamide Substances 0.000 claims abstract description 14
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 claims abstract description 14
- 235000019399 azodicarbonamide Nutrition 0.000 claims abstract description 14
- 238000013329 compounding Methods 0.000 claims abstract description 13
- 235000019353 potassium silicate Nutrition 0.000 claims description 70
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 70
- 238000002156 mixing Methods 0.000 claims description 60
- 238000005303 weighing Methods 0.000 claims description 44
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 claims description 40
- 238000003756 stirring Methods 0.000 claims description 40
- 238000004804 winding Methods 0.000 claims description 40
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 30
- 230000006835 compression Effects 0.000 claims description 30
- 238000007906 compression Methods 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 23
- 239000011248 coating agent Substances 0.000 claims description 22
- 238000000576 coating method Methods 0.000 claims description 22
- IJOOHPMOJXWVHK-UHFFFAOYSA-N chlorotrimethylsilane Chemical compound C[Si](C)(C)Cl IJOOHPMOJXWVHK-UHFFFAOYSA-N 0.000 claims description 20
- 239000008367 deionised water Substances 0.000 claims description 20
- 229910021641 deionized water Inorganic materials 0.000 claims description 20
- 238000001035 drying Methods 0.000 claims description 20
- 239000011259 mixed solution Substances 0.000 claims description 20
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 20
- 238000002791 soaking Methods 0.000 claims description 20
- 230000015556 catabolic process Effects 0.000 claims description 19
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 230000001680 brushing effect Effects 0.000 claims description 11
- 238000004026 adhesive bonding Methods 0.000 claims description 10
- 230000032683 aging Effects 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 10
- 238000011010 flushing procedure Methods 0.000 claims description 10
- 238000012986 modification Methods 0.000 claims description 10
- 230000004048 modification Effects 0.000 claims description 10
- 230000007935 neutral effect Effects 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 10
- 239000005051 trimethylchlorosilane Substances 0.000 claims description 10
- 238000007873 sieving Methods 0.000 claims description 9
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 claims description 4
- 238000003490 calendering Methods 0.000 claims description 3
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- 239000000758 substrate Substances 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 3
- 239000012772 electrical insulation material Substances 0.000 abstract description 2
- 239000007864 aqueous solution Substances 0.000 description 8
- 229920003023 plastic Polymers 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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- 238000005096 rolling process Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
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- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/10—Layered products comprising a layer of natural or synthetic rubber next to a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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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
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0406—Details thereof
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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
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0462—Tubings, i.e. having a closed section
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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
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/04—Installations of electric cables or lines in or on the ground or water in surface ducts; Ducts or covers therefor
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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
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/06—Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/206—Insulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses a high-rigidity high-insulation composite sleeve and a manufacturing method thereof, and belongs to the technical field of electrical insulation materials. The invention sequentially comprises an insulating inner liner layer, a rigid inner structural layer, an insulating rubber layer and a rigid outer structural layer from the innermost layer to the outermost layer; the insulating lining layer is formed by compounding polyvinyl chloride, modified rubber particles and azodicarbonamide; the rigid inner structural layer is formed by compounding epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles and mullite fiber needled felt; the insulating rubber layer is formed by adhering rubber cloth through epoxy resin adhesive; the rigid outer structural layer is formed by compounding epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles and glass fiber cloth. The inner liner has certain flexibility, can be matched with an internal cable better, has high rigidity of a structural layer, is not creeping, is highly insulating, is anti-corrosion, is light in weight, is not broken and is low in price. Can be used for protecting wires and cables.
Description
Technical Field
The invention discloses a structural material, in particular relates to a high-rigidity high-insulation composite sleeve and a manufacturing method thereof, and belongs to the technical field of electrical insulation materials.
Background
In the laying process of the electric wires and cables, the electric wires and cables are sometimes required to be laid in a suspended mode, sometimes required to pass through buildings such as walls and the like, and sometimes are directly and temporarily laid on the ground. Because the electric wire and the cable are mainly formed by compounding high polymer materials and metal wires, the gravity of the electric wire and the cable tends to cause creep sagging when the electric wire and the cable are suspended and laid, in order to avoid sagging, the distance between two adjacent brackets for supporting the electric wire and the cable is shortened, so that the working strength of the mounting bracket is increased, more importantly, the mounting position of the bracket is limited in many occasions, and more brackets cannot be mounted at all; when penetrating through buildings such as walls, the wall body is prevented from being in direct contact with wires and cables as far as possible so as to avoid abrasion and corrosion of the wires and cables caused by wall body materials, and the traditional method is to use ceramic sleeves, so that the ceramic sleeves are large in brittleness, easy to crack and heavy; when the cable is directly paved on the ground for temporary use, vehicles can be rolled, and the like, the cable is buried under the ground temporarily by adopting the common measures of digging a groove, so that the workload of digging and later repairing the ground is increased, and the rolling of the vehicles can not be effectively avoided. In all these applications, it is desirable to have a protective sheath for the wire and cable that ensures that the cable does not deform, wear or break. Therefore, the invention provides the high-rigidity high-insulation composite sleeve and the manufacturing method thereof, and the cable is effectively protected.
Disclosure of Invention
The invention aims at providing a high-rigidity high-insulation composite sleeve and a manufacturing method thereof.
The high-rigidity high-insulation composite sleeve comprises an insulation lining layer, a rigid inner structural layer, an insulation rubber layer and a rigid outer structural layer from the innermost layer to the outermost layer in sequence; the insulating lining layer is formed by compounding polyvinyl chloride, modified rubber particles and azodicarbonamide; the rigid inner structural layer is formed by compounding epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles and mullite fiber needled felt; the insulating rubber layer is formed by adhering rubber cloth through epoxy resin adhesive; the rigid outer structural layer is formed by compounding epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles and glass fiber cloth.
The modified rubber particles are modified ethylene propylene rubber particles, and the average particle size of the modified ethylene propylene rubber particles is 200-400nm.
The average grain diameter of the modified expanded perlite particles is 200-600nm.
The volume weight of the mullite fiber needled felt is 80-160kg/m 3 。
The rubber cloth is formed by coating silicon rubber on glass fiber cloth serving as a base material and then calendaring, wherein the average breakdown voltage of the rubber cloth is 20-50kV/mm.
The single weight of the glass fiber cloth is 300-500g/m 2 。
The manufacturing method of the high-rigidity high-insulation composite sleeve comprises the following steps:
(1) Soaking ethylene propylene rubber particles in 2-10 wt% concentration sodium hydroxide aqua for 12-24 hr, filtering, flushing the ethylene propylene rubber particles with clear water until the eluate is neutral, drying and sieving to obtain modified rubber particles;
(2) Respectively weighing polyvinyl chloride, modified rubber particles and azodicarbonamide according to the mass ratio of 100:8-16:1.2-1.6, uniformly mixing, and extruding to form a hollow tubular insulating lining layer, wherein the extrusion temperature is 175-185 ℃, and the thickness of the lining layer is 1-2mm;
(3) Respectively weighing water glass, deionized water and formamide according to the volume ratio of 100:300-500:1-3, uniformly mixing the water glass and the deionized water, stirring and reacting for 30-60min, regulating the pH of the solution to 1.0-1.6, then adding the formamide, stirring uniformly, and regulating the pH to 3.2-4.0 to obtain colloidal water glass; respectively weighing the expanded perlite and the colloidal water glass according to the mass ratio of 100:3-11, uniformly mixing, pressurizing to 5-15MPa, maintaining the pressure for 4-8 hours, and then sealing and aging in the air for 24-36 hours to obtain the water glass treated expanded perlite; respectively weighing trimethylchlorosilane, ethanol and n-hexane according to the volume ratio of 100:25-55:40-120, uniformly mixing to form a mixed solution, soaking water glass in the mixed solution to treat the expanded perlite to perform solvent replacement and surface modification, and finally respectively carrying out gradient drying for 3-5h and 6-8h at 70-80 ℃ and 170-180 ℃, cooling to room temperature and crushing to obtain modified expanded perlite particles; the Baume degree of the water glass is 43-45 degrees;
(4) Respectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles and mullite fiber needled felt according to the mass ratio of 100:10-12:12-18:10-20:40-60, uniformly mixing the epoxy resin, the polyethylene glycol diglycidyl ether and the modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, and uniformly coating on the surface of the mullite fiber needled felt to form a gummed needled felt;
(5) Tightly wrapping the gluing needled felt on the outer surface of the hollow tubular insulating lining layer by adopting a winding process, lightly extruding by using a compression roller, and removing bubbles to form a rigid inner structural layer, wherein the thickness of the rigid inner structural layer is 2-4mm;
(6) Winding a first layer of rubber cloth on the surface of the rigid inner structural layer, uniformly brushing a layer of epoxy resin adhesive on the surface of the rubber cloth, winding a second layer of rubber cloth on the surface of the epoxy resin adhesive, lightly extruding by using a compression roller to ensure that the two layers of rubber cloth are completely adhered together and tightly wrap the rigid inner structural layer to form an insulating rubber layer, wherein the thickness of the insulating rubber layer is 0.5-1.5mm;
(7) Respectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles and glass fiber cloth according to the mass ratio of 100:10-12:12-18:5-9:60-80, uniformly mixing the epoxy resin, the polyethylene glycol diglycidyl ether and the modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, and uniformly coating on the surface of the glass fiber cloth to form the rubberized glass fiber cloth;
(8) The adhesive-coated glass fiber cloth is tightly coated on the outer surface of the insulating rubber layer by adopting a winding process, and is lightly extruded by a compression roller to remove bubbles, so that a rigid outer structure layer is formed, and the thickness of the rigid outer structure layer is 3-7mm, thereby completing the manufacture of the high-rigidity high-insulation composite sleeve.
The invention comprises the following steps:
(1) The high-rigidity high-insulation composite sleeve is prepared by adopting a multilayer composite mode, the composite sleeve insulation lining layer is formed by compositing thermoplastic plastics and rubber particles, has certain flexibility, can be matched with wires and cables inside better, and has high rigidity, wherein the inner and outer structural layers are formed by compositing epoxy resin, modified expanded perlite particles and mullite fiber needled felt or glass fiber cloth; the structural design of the double structural layer ensures that the obtained composite sleeve has high rigidity.
(2) Sodium hydroxide is adopted to pretreat rubber particles, auxiliary agents such as zinc stearate and the like on the surface of the rubber are eliminated, a cavity is left on the surface of the rubber, compared with untreated rubber, a relatively rough and porous surface is formed on the surface of the rubber, the rubber is mixed with polyvinyl chloride plastic particles, part of the plastic particles infiltrate into the cavity on the surface of the rubber, and after foaming, an insulating lining layer with evenly distributed rubber and plastic is formed;
(3) The double insulation of plastic and rubber and the design of inner and outer thermosetting structural layers ensure the high insulation and high rigidity characteristics of the obtained sleeve.
(4) The epoxy resin is used as the matrix resin of the rigid outer structural layer, so that the corrosion resistance is good.
(5) Compared with a metal sleeve, the metal sleeve has light weight, good insulating property and high use safety; compared with the ceramic sleeve, the ceramic sleeve has light weight, is not easy to crack and has low price; compared with plastic sleeves such as polyvinyl chloride, the plastic sleeve has high rigidity and no creep deformation.
(6) The electric wires and cables are arranged in the electric wire and cable protective device, so that the electric wires and cables can be protected, and potential safety hazards, which may be caused by damage of the electric wires and cables to surrounding people, animals, buildings and the like, can be eliminated.
Detailed Description
The high-rigidity high-insulation composite sleeve comprises an insulation lining layer, a rigid inner structural layer, an insulation rubber layer and a rigid outer structural layer from the innermost layer to the outermost layer in sequence; the insulating lining layer is formed by compounding polyvinyl chloride, modified rubber particles and azodicarbonamide; the rigid inner structural layer is formed by compounding epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles and mullite fiber needled felt; the insulating rubber layer is formed by adhering rubber cloth through epoxy resin adhesive; the rigid outer structural layer is formed by compounding epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles and glass fiber cloth.
The rubber cloth is formed by taking glass fiber cloth as a base material, coating silicon rubber, and then calendaring.
Example 1: the manufacturing method of the high-rigidity high-insulation composite sleeve comprises the following steps:
(1) Soaking ethylene propylene rubber particles in 6% sodium hydroxide aqueous solution for 18h, filtering, flushing the ethylene propylene rubber particles with clear water until the eluate is neutral, drying, and sieving to obtain modified rubber particles with an average particle diameter of 300nm;
(2) Respectively weighing polyvinyl chloride, modified rubber particles and azodicarbonamide according to the mass ratio of 100:12:1.4, uniformly mixing, and extruding to form a hollow tubular insulating lining layer, wherein the extrusion temperature is 180 ℃, and the thickness of the lining layer is 1.5mm;
(3) Respectively measuring water glass, deionized water and formamide according to the volume ratio of 100:400:2, uniformly mixing the water glass and the deionized water, stirring and reacting for 45min, regulating the pH value of the solution to 1.3, then adding the formamide, stirring uniformly, and regulating the pH value to 3.6 to obtain colloidal water glass; respectively weighing the expanded perlite and the colloidal water glass according to the mass ratio of 100:7, uniformly mixing, pressurizing to 10MPa, maintaining the pressure for 6 hours, and then sealing and aging in the air for 30 hours to obtain the water glass treated expanded perlite; respectively measuring trimethylchlorosilane, ethanol and n-hexane according to the volume ratio of 100:40:80, uniformly mixing to form a mixed solution, soaking water glass in the mixed solution to treat the expanded perlite to perform solvent replacement and surface modification, finally respectively carrying out gradient drying for 4h and 7h at the temperature of 75 ℃ and 175 ℃, cooling to room temperature, and crushing to obtain modified expanded perlite particles; the Baume degree of the water glass is 44 degrees;
(4) Respectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles (average particle size is 400 nm) and mullite fiber needled felt (volume weight is 120 kg/m) according to the mass ratio of 100:11:15:15:50 3 ) Uniformly mixing epoxy resin, polyethylene glycol diglycidyl ether and modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, uniformly coating on the surface of mullite fiber needled felt,forming a rubberized needled felt;
(5) Tightly wrapping the gluing needled felt on the outer surface of the hollow tubular insulating lining layer by adopting a winding process, lightly extruding by using a compression roller, and removing bubbles to form a rigid inner structural layer, wherein the thickness of the rigid inner structural layer is 3mm;
(6) Winding a first layer of rubber cloth (the average breakdown voltage is 35 kV/mm) on the surface of the rigid inner structural layer, uniformly brushing a layer of epoxy resin adhesive on the surface of the rubber cloth, winding a second layer of rubber cloth (the average breakdown voltage is 35 kV/mm) on the surface of the epoxy resin adhesive, lightly extruding by using a compression roller to ensure that the two layers of rubber cloth are completely stuck together and tightly wrap the rigid inner structural layer to form an insulating rubber layer, wherein the thickness of the insulating rubber layer is 1.0mm;
(7) Respectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles (average particle size is 400 nm) and glass fiber cloth (single weight is 400 g/m) according to the mass ratio of 100:11:15:7:70 2 ) Uniformly mixing epoxy resin, polyethylene glycol diglycidyl ether and modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, and uniformly coating on the surface of glass fiber cloth to form glued glass fiber cloth;
(8) The adhesive-coated glass fiber cloth is tightly coated on the outer surface of the insulating rubber layer by adopting a winding process, and is lightly extruded by a compression roller to remove bubbles, so that a rigid outer structure layer is formed, the thickness of the rigid outer structure layer is 5mm, and the manufacturing of the high-rigidity high-insulation composite sleeve is completed.
Example 2: the manufacturing method of the high-rigidity high-insulation composite sleeve comprises the following steps:
(1) Soaking ethylene propylene rubber particles in 2% sodium hydroxide aqueous solution for 12h, filtering, flushing the ethylene propylene rubber particles with clear water until the eluate is neutral, drying, and sieving to obtain modified rubber particles with an average particle diameter of 200nm;
(2) Respectively weighing polyvinyl chloride, modified rubber particles and azodicarbonamide according to the mass ratio of 100:8:1.2, uniformly mixing, and extruding to form a hollow tubular insulating lining layer, wherein the extrusion temperature is 175 ℃, and the thickness of the lining layer is 1mm;
(3) Respectively measuring water glass, deionized water and formamide according to the volume ratio of 100:300:1, uniformly mixing the water glass and the deionized water, stirring and reacting for 30min, adjusting the pH value of the solution to 1.0, then adding the formamide, stirring uniformly, and adjusting the pH value to 3.2 to obtain colloidal water glass; respectively weighing the expanded perlite and the colloidal water glass according to the mass ratio of 100:3, uniformly mixing, pressurizing to 5MPa, maintaining the pressure for 4 hours, and then sealing and aging in the air for 24 hours to obtain the water glass treated expanded perlite; respectively measuring trimethylchlorosilane, ethanol and n-hexane according to the volume ratio of 100:25:40, uniformly mixing to form a mixed solution, soaking water glass in the mixed solution to treat the expanded perlite to perform solvent replacement and surface modification, finally respectively carrying out gradient drying for 3h and 6h at 70 ℃ and 170 ℃, cooling to room temperature, and crushing to obtain modified expanded perlite particles; the Baume degree of the water glass is 43 ℃;
(4) Respectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles (average particle size is 200 nm) and mullite fiber needled felt (volume weight is 80 kg/m) according to the mass ratio of 100:10:12:10:40 3 ) Uniformly mixing epoxy resin, polyethylene glycol diglycidyl ether and modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, and uniformly coating on the surface of the mullite fiber needled felt to form a gummed needled felt;
(5) Tightly wrapping the gluing needled felt on the outer surface of the hollow tubular insulating lining layer by adopting a winding process, lightly extruding by using a compression roller, and removing bubbles to form a rigid inner structural layer, wherein the thickness of the rigid inner structural layer is 2mm;
(6) Winding a first layer of rubber cloth (average breakdown voltage is 20 kV/mm) on the surface of the rigid inner structural layer, uniformly brushing a layer of epoxy resin adhesive on the surface of the rubber cloth, winding a second layer of rubber cloth (average breakdown voltage is 20 kV/mm) on the surface of the epoxy resin adhesive, lightly extruding by using a compression roller to ensure that the two layers of rubber cloth are completely stuck together and tightly wrap the rigid inner structural layer to form an insulating rubber layer, wherein the thickness of the insulating rubber layer is 0.5mm;
(7) Pressing the buttonRespectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles (average particle diameter is 200 nm) and glass fiber cloth (single weight is 300 g/m) according to the mass ratio of 100:10:12:5:60 2 ) Uniformly mixing epoxy resin, polyethylene glycol diglycidyl ether and modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, and uniformly coating on the surface of glass fiber cloth to form glued glass fiber cloth;
(8) The adhesive-coated glass fiber cloth is tightly coated on the outer surface of the insulating rubber layer by adopting a winding process, and is lightly extruded by a compression roller to remove bubbles, so that a rigid outer structure layer is formed, the thickness of the rigid outer structure layer is 3mm, and the manufacturing of the high-rigidity high-insulation composite sleeve is completed.
Example 3: the manufacturing method of the high-rigidity high-insulation composite sleeve comprises the following steps:
(1) Soaking ethylene propylene rubber particles in 10% sodium hydroxide aqueous solution for 24h, filtering, flushing the ethylene propylene rubber particles with clear water until the eluate is neutral, drying, and sieving to obtain modified rubber particles with an average particle diameter of 400nm;
(2) Respectively weighing polyvinyl chloride, modified rubber particles and azodicarbonamide according to the mass ratio of 100:16:1.6, uniformly mixing, and extruding to form a hollow tubular insulating lining layer, wherein the extrusion temperature is 185 ℃, and the thickness of the lining layer is 2mm;
(3) Respectively measuring water glass, deionized water and formamide according to the volume ratio of 100:500:3, uniformly mixing the water glass and the deionized water, stirring and reacting for 60min, regulating the pH value of the solution to 1.6, then adding the formamide, stirring uniformly, and regulating the pH value to 4.0 to obtain colloidal water glass; respectively weighing the expanded perlite and the colloidal water glass according to the mass ratio of 100:11, uniformly mixing, pressurizing to 15MPa, maintaining the pressure for 8 hours, and then sealing and aging in the air for 36 hours to obtain the water glass treated expanded perlite; respectively measuring trimethylchlorosilane, ethanol and n-hexane according to the volume ratio of 100:55:120, uniformly mixing to form a mixed solution, soaking water glass in the mixed solution to treat the expanded perlite to perform solvent replacement and surface modification, finally respectively carrying out gradient drying for 5h and 8h at the temperature of 80 ℃ and the temperature of 180 ℃, cooling to room temperature, and crushing to obtain modified expanded perlite particles; the Baume degree of the water glass is 45 degrees;
(4) Respectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles (average particle diameter is 600 nm) and mullite fiber needled felt (volume weight is 160 kg/m) according to the mass ratio of 100:12:18:20:60 3 ) Uniformly mixing epoxy resin, polyethylene glycol diglycidyl ether and modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, and uniformly coating on the surface of the mullite fiber needled felt to form a gummed needled felt;
(5) Tightly wrapping the gluing needled felt on the outer surface of the hollow tubular insulating lining layer by adopting a winding process, lightly extruding by using a compression roller, and removing bubbles to form a rigid inner structural layer;
(6) Winding a first layer of rubber cloth (the average breakdown voltage is 50 kV/mm) on the surface of the rigid inner structural layer, uniformly brushing a layer of epoxy resin adhesive on the surface of the rubber cloth, winding a second layer of rubber cloth (the average breakdown voltage is 50 kV/mm) on the surface of the epoxy resin adhesive, lightly extruding by using a compression roller to ensure that the two layers of rubber cloth are completely stuck together and tightly wrap the rigid inner structural layer to form an insulating rubber layer, wherein the thickness of the insulating rubber layer is 1.5mm;
(7) Respectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles (average particle diameter is 600 nm) and glass fiber cloth (single weight is 500 g/m) according to the mass ratio of 100:12:18:9:80 2 ) Uniformly mixing epoxy resin, polyethylene glycol diglycidyl ether and modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, and uniformly coating on the surface of glass fiber cloth to form glued glass fiber cloth;
(8) The adhesive-coated glass fiber cloth is tightly coated on the outer surface of the insulating rubber layer by adopting a winding process, and is lightly extruded by a compression roller to remove bubbles, so that a rigid outer structure layer is formed, the thickness of the rigid outer structure layer is 7mm, and the manufacturing of the high-rigidity high-insulation composite sleeve is completed.
Example 4: the manufacturing method of the high-rigidity high-insulation composite sleeve comprises the following steps:
(1) Soaking ethylene propylene rubber particles in 2% sodium hydroxide aqueous solution for 18h, filtering, flushing the ethylene propylene rubber particles with clear water until the eluate is neutral, drying, and sieving to obtain modified rubber particles with an average particle diameter of 400nm;
(2) Respectively weighing polyvinyl chloride, modified rubber particles and azodicarbonamide according to the mass ratio of 100:8:1.4, uniformly mixing, and extruding to form a hollow tubular insulating lining layer, wherein the extrusion temperature is 185 ℃, and the thickness of the lining layer is 1mm;
(3) Respectively measuring water glass, deionized water and formamide according to the volume ratio of 100:400:3, uniformly mixing the water glass and the deionized water, stirring and reacting for 30min, adjusting the pH value of the solution to 1.3, then adding the formamide, stirring uniformly, and adjusting the pH value to 4.0 to obtain colloidal water glass; respectively weighing the expanded perlite and the colloidal water glass according to the mass ratio of 100:3, uniformly mixing, pressurizing to 10MPa, maintaining the pressure for 8 hours, and then sealing and aging in the air for 24 hours to obtain the water glass treated expanded perlite; respectively measuring trimethylchlorosilane, ethanol and n-hexane according to the volume ratio of 100:40:120, uniformly mixing to form a mixed solution, soaking water glass in the mixed solution to treat the expanded perlite to perform solvent replacement and surface modification, finally respectively carrying out gradient drying for 5h and 6h at 70 ℃ and 175 ℃, cooling to room temperature, and crushing to obtain modified expanded perlite particles; the Baume degree of the water glass is 44 degrees;
(4) Respectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles (average particle size is 200 nm) and mullite fiber needled felt (volume weight is 120 kg/m) according to the mass ratio of 100:12:12:15:60 3 ) Uniformly mixing epoxy resin, polyethylene glycol diglycidyl ether and modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, and uniformly coating on the surface of the mullite fiber needled felt to form a gummed needled felt;
(5) Tightly wrapping the gluing needled felt on the outer surface of the hollow tubular insulating lining layer by adopting a winding process, lightly extruding by using a compression roller, and removing bubbles to form a rigid inner structural layer, wherein the thickness of the rigid inner structural layer is 4mm;
(6) Winding a first layer of rubber cloth (average breakdown voltage is 20 kV/mm) on the surface of the rigid inner structural layer, uniformly brushing a layer of epoxy resin adhesive on the surface of the rubber cloth, winding a second layer of rubber cloth (average breakdown voltage is 35 kV/mm) on the surface of the epoxy resin adhesive, lightly extruding by using a compression roller to ensure that the two layers of rubber cloth are completely stuck together and tightly wrap the rigid inner structural layer to form an insulating rubber layer, wherein the thickness of the insulating rubber layer is 1.5mm;
(7) Respectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles (average particle size is 400 nm) and glass fiber cloth (single weight is 500 g/m) according to the mass ratio of 100:10:15:9:60 2 ) Uniformly mixing epoxy resin, polyethylene glycol diglycidyl ether and modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, and uniformly coating on the surface of glass fiber cloth to form glued glass fiber cloth;
(8) The adhesive-coated glass fiber cloth is tightly coated on the outer surface of the insulating rubber layer by adopting a winding process, and is lightly extruded by a compression roller to remove bubbles, so that a rigid outer structure layer is formed, the thickness of the rigid outer structure layer is 3mm, and the manufacturing of the high-rigidity high-insulation composite sleeve is completed.
Example 5: the manufacturing method of the high-rigidity high-insulation composite sleeve comprises the following steps:
(1) Soaking ethylene propylene rubber particles in a sodium hydroxide aqueous solution with the mass percent concentration of 6% for 24 hours, filtering, flushing the ethylene propylene rubber particles with clear water until the eluate is neutral, drying, and screening to obtain modified rubber particles with the average particle diameter of 200nm;
(2) Respectively weighing polyvinyl chloride, modified rubber particles and azodicarbonamide according to the mass ratio of 100:12:1.6, uniformly mixing, and extruding to form a hollow tubular insulating lining layer, wherein the extrusion temperature is 175 ℃, and the thickness of the lining layer is 1.5mm;
(3) Respectively measuring water glass, deionized water and formamide according to the volume ratio of 100:500:1, uniformly mixing the water glass and the deionized water, stirring and reacting for 45min, adjusting the pH value of the solution to 1.6, then adding the formamide, stirring uniformly, and adjusting the pH value to 3.2 to obtain colloidal water glass; respectively weighing the expanded perlite and the colloidal water glass according to the mass ratio of 100:7, uniformly mixing, pressurizing to 15MPa, maintaining the pressure for 4 hours, and then sealing and aging in the air for 30 hours to obtain the water glass treated expanded perlite; respectively measuring trimethylchlorosilane, ethanol and n-hexane according to the volume ratio of 100:55:40, uniformly mixing to form a mixed solution, soaking water glass in the mixed solution to treat the expanded perlite to perform solvent replacement and surface modification, finally respectively carrying out gradient drying for 3h and 7h at the temperature of 75 ℃ and the temperature of 180 ℃, cooling to room temperature, and crushing to obtain modified expanded perlite particles; the Baume degree of the water glass is 45 degrees;
(4) Respectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles (average particle size is 400 nm) and mullite fiber needled felt (volume weight is 160 kg/m) according to the mass ratio of 100:10:15:20:40 3 ) Uniformly mixing epoxy resin, polyethylene glycol diglycidyl ether and modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, and uniformly coating on the surface of the mullite fiber needled felt to form a gummed needled felt;
(5) Tightly wrapping the gluing needled felt on the outer surface of the hollow tubular insulating lining layer by adopting a winding process, lightly extruding by using a compression roller, and removing bubbles to form a rigid inner structural layer, wherein the thickness of the rigid inner structural layer is 2mm;
(6) Winding a first layer of rubber cloth (the average breakdown voltage is 35 kV/mm) on the surface of the rigid inner structural layer, uniformly brushing a layer of epoxy resin adhesive on the surface of the rubber cloth, winding a second layer of rubber cloth (the average breakdown voltage is 50 kV/mm) on the surface of the epoxy resin adhesive, lightly extruding by using a compression roller to ensure that the two layers of rubber cloth are completely stuck together and tightly wrap the rigid inner structural layer to form an insulating rubber layer, wherein the thickness of the insulating rubber layer is 0.5mm;
(7) Respectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine and modified expanded perlite particles according to the mass ratio of 100:11:18:5:70(average particle diameter of 600 nm) and glass cloth (single weight of 300 g/m) 2 ) Uniformly mixing epoxy resin, polyethylene glycol diglycidyl ether and modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, and uniformly coating on the surface of glass fiber cloth to form glued glass fiber cloth;
(8) The adhesive-coated glass fiber cloth is tightly coated on the outer surface of the insulating rubber layer by adopting a winding process, and is lightly extruded by a compression roller to remove bubbles, so that a rigid outer structure layer is formed, the thickness of the rigid outer structure layer is 5mm, and the manufacturing of the high-rigidity high-insulation composite sleeve is completed.
Example 6: the manufacturing method of the high-rigidity high-insulation composite sleeve comprises the following steps:
(1) Soaking ethylene propylene rubber particles in 10% sodium hydroxide aqueous solution for 12h, filtering, flushing the ethylene propylene rubber particles with clear water until the eluate is neutral, drying, and sieving to obtain modified rubber particles with an average particle diameter of 300nm;
(2) Respectively weighing polyvinyl chloride, modified rubber particles and azodicarbonamide according to the mass ratio of 100:16:1.2, uniformly mixing, and extruding to form a hollow tubular insulating lining layer, wherein the extrusion temperature is 180 ℃, and the thickness of the lining layer is 2mm;
(3) Respectively measuring water glass, deionized water and formamide according to the volume ratio of 100:300:2, uniformly mixing the water glass and the deionized water, stirring and reacting for 60min, regulating the pH value of the solution to 1.0, then adding the formamide, stirring uniformly, and regulating the pH value to 3.6 to obtain colloidal water glass; respectively weighing the expanded perlite and the colloidal water glass according to the mass ratio of 100:11, uniformly mixing, pressurizing to 5MPa, maintaining the pressure for 6 hours, and then sealing and aging in the air for 36 hours to obtain the water glass treated expanded perlite; respectively measuring trimethylchlorosilane, ethanol and n-hexane according to the volume ratio of 100:25:80, uniformly mixing to form a mixed solution, soaking water glass in the mixed solution to treat the expanded perlite to perform solvent replacement and surface modification, finally respectively carrying out gradient drying for 4h and 8h at the temperature of 80 ℃ and 170 ℃, cooling to room temperature, and crushing to obtain modified expanded perlite particles; the Baume degree of the water glass is 43 ℃;
(4) Respectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles (average particle diameter is 600 nm) and mullite fiber needled felt (volume weight is 80 kg/m) according to the mass ratio of 100:11:18:10:50 3 ) Uniformly mixing epoxy resin, polyethylene glycol diglycidyl ether and modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, and uniformly coating on the surface of the mullite fiber needled felt to form a gummed needled felt;
(5) Tightly wrapping the gluing needled felt on the outer surface of the hollow tubular insulating lining layer by adopting a winding process, lightly extruding by using a compression roller, and removing bubbles to form a rigid inner structural layer, wherein the thickness of the rigid inner structural layer is 3mm;
(6) Winding a first layer of rubber cloth (average breakdown voltage is 50 kV/mm) on the surface of the rigid inner structural layer, uniformly brushing a layer of epoxy resin adhesive on the surface of the rubber cloth, winding a second layer of rubber cloth (average breakdown voltage is 20 kV/mm) on the surface of the epoxy resin adhesive, lightly extruding by using a compression roller to ensure that the two layers of rubber cloth are completely stuck together and tightly wrap the rigid inner structural layer to form an insulating rubber layer, wherein the thickness of the insulating rubber layer is 1mm;
(7) Respectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles (average particle size is 200 nm) and glass fiber cloth (single weight is 400 g/m) according to the mass ratio of 100:12:12:7:80 2 ) Uniformly mixing epoxy resin, polyethylene glycol diglycidyl ether and modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, and uniformly coating on the surface of glass fiber cloth to form glued glass fiber cloth;
(8) The adhesive-coated glass fiber cloth is tightly coated on the outer surface of the insulating rubber layer by adopting a winding process, and is lightly extruded by a compression roller to remove bubbles, so that a rigid outer structure layer is formed, the thickness of the rigid outer structure layer is 7mm, and the manufacturing of the high-rigidity high-insulation composite sleeve is completed.
Example 7: the manufacturing method of the high-rigidity high-insulation composite sleeve comprises the following steps:
(1) Soaking ethylene propylene rubber particles in 2% sodium hydroxide aqueous solution for 12h, filtering, flushing the ethylene propylene rubber particles with clear water until the eluate is neutral, drying, and sieving to obtain modified rubber particles with an average particle diameter of 200nm;
(2) Respectively weighing polyvinyl chloride, modified rubber particles and azodicarbonamide according to the mass ratio of 100:12:1.4, uniformly mixing, and extruding to form a hollow tubular insulating lining layer, wherein the extrusion temperature is 180 ℃, and the thickness of the lining layer is 1.5mm;
(3) Respectively measuring water glass, deionized water and formamide according to the volume ratio of 100:500:3, uniformly mixing the water glass and the deionized water, stirring and reacting for 60min, regulating the pH value of the solution to 1.6, then adding the formamide, stirring uniformly, and regulating the pH value to 4.0 to obtain colloidal water glass; respectively weighing the expanded perlite and the colloidal water glass according to the mass ratio of 100:11, uniformly mixing, pressurizing to 15MPa, maintaining the pressure for 8 hours, and then sealing and aging in the air for 36 hours to obtain the water glass treated expanded perlite; respectively measuring trimethylchlorosilane, ethanol and n-hexane according to the volume ratio of 100:55:120, uniformly mixing to form a mixed solution, soaking water glass in the mixed solution to treat the expanded perlite to perform solvent replacement and surface modification, finally respectively carrying out gradient drying for 5h and 8h at the temperature of 80 ℃ and the temperature of 180 ℃, cooling to room temperature, and crushing to obtain modified expanded perlite particles; the Baume degree of the water glass is 45 degrees;
(4) Respectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles (average particle size is 200 nm) and mullite fiber needled felt (volume weight is 80 kg/m) according to the mass ratio of 100:10:12:10:40 3 ) Uniformly mixing epoxy resin, polyethylene glycol diglycidyl ether and modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, and uniformly coating on the surface of the mullite fiber needled felt to form a gummed needled felt;
(5) Tightly wrapping the gluing needled felt on the outer surface of the hollow tubular insulating lining layer by adopting a winding process, lightly extruding by using a compression roller, and removing bubbles to form a rigid inner structural layer, wherein the thickness of the rigid inner structural layer is 3mm;
(6) Winding a first layer of rubber cloth (the average breakdown voltage is 50 kV/mm) on the surface of the rigid inner structural layer, uniformly brushing a layer of epoxy resin adhesive on the surface of the rubber cloth, winding a second layer of rubber cloth (the average breakdown voltage is 50 kV/mm) on the surface of the epoxy resin adhesive, lightly extruding by using a compression roller to ensure that the two layers of rubber cloth are completely stuck together and tightly wrap the rigid inner structural layer to form an insulating rubber layer, wherein the thickness of the insulating rubber layer is 1.5mm;
(7) Respectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles (average particle size is 200 nm) and glass fiber cloth (single weight is 300 g/m) according to the mass ratio of 100:10:12:5:60 2 ) Uniformly mixing epoxy resin, polyethylene glycol diglycidyl ether and modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, and uniformly coating on the surface of glass fiber cloth to form glued glass fiber cloth;
(8) The adhesive-coated glass fiber cloth is tightly coated on the outer surface of the insulating rubber layer by adopting a winding process, and is lightly extruded by a compression roller to remove bubbles, so that a rigid outer structure layer is formed, the thickness of the rigid outer structure layer is 5mm, and the manufacturing of the high-rigidity high-insulation composite sleeve is completed.
Example 8: the manufacturing method of the high-rigidity high-insulation composite sleeve comprises the following steps:
(1) Soaking ethylene propylene rubber particles in 7% sodium hydroxide aqueous solution for 15h, filtering, flushing the ethylene propylene rubber particles with clear water until the eluate is neutral, drying, and sieving to obtain modified rubber particles with an average particle diameter of 280nm;
(2) Respectively weighing polyvinyl chloride, modified rubber particles and azodicarbonamide according to the mass ratio of 100:10:1.3, uniformly mixing, and extruding to form a hollow tubular insulating lining layer, wherein the extrusion temperature is 178 ℃, and the thickness of the lining layer is 1.2mm;
(3) Respectively measuring water glass, deionized water and formamide according to the volume ratio of 100:350:1.3, uniformly mixing the water glass and the deionized water, stirring and reacting for 40min, adjusting the pH value of the solution to 1.2, adding the formamide, stirring uniformly, and adjusting the pH value to 3.8 to obtain colloidal water glass; respectively weighing the expanded perlite and the colloidal water glass according to the mass ratio of 100:8, uniformly mixing, pressurizing to 8MPa, maintaining the pressure for 5 hours, and then sealing and aging in the air for 25 hours to obtain the water glass treated expanded perlite; respectively measuring trimethylchlorosilane, ethanol and n-hexane according to the volume ratio of 100:28:48, uniformly mixing to form a mixed solution, soaking water glass in the mixed solution to treat the expanded perlite to perform solvent replacement and surface modification, finally respectively carrying out gradient drying for 3.5h and 6.5h at 78 ℃ and 178 ℃, cooling to room temperature, and crushing to obtain modified expanded perlite particles; the Baume degree of the water glass is 43.5 ℃;
(4) Respectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles (average particle diameter is 260 nm) and mullite fiber needled felt (volume weight is 100 kg/m) according to the mass ratio of 100:10.5:16:16:46 3 ) Uniformly mixing epoxy resin, polyethylene glycol diglycidyl ether and modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, and uniformly coating on the surface of the mullite fiber needled felt to form a gummed needled felt;
(5) Tightly wrapping the gluing needled felt on the outer surface of the hollow tubular insulating lining layer by adopting a winding process, lightly extruding by using a compression roller, and removing bubbles to form a rigid inner structural layer, wherein the thickness of the rigid inner structural layer is 2.4mm;
(6) Winding a first layer of rubber cloth (with an average breakdown voltage of 40 kV/mm) on the surface of the rigid inner structural layer, uniformly brushing a layer of epoxy resin adhesive on the surface of the rubber cloth, winding a second layer of rubber cloth (with an average breakdown voltage of 30 kV/mm) on the surface of the epoxy resin adhesive, lightly extruding by using a compression roller to ensure that the two layers of rubber cloth are completely stuck together, tightly wrapping the rigid inner structural layer, and forming an insulating rubber layer, wherein the thickness of the insulating rubber layer is 0.8mm;
(7) Respectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles (average particle diameter is 280 nm) and glass fiber cloth (single weight is 420 g/m) according to the mass ratio of 100:10.5:13:8:68 2 ) Epoxy resin and polyethyleneUniformly mixing glycol diglycidyl ether and modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, and uniformly brushing on the surface of glass fiber cloth to form glued glass fiber cloth;
(8) The adhesive-coated glass fiber cloth is tightly coated on the outer surface of the insulating rubber layer by adopting a winding process, and is lightly extruded by a compression roller to remove bubbles to form a rigid outer structural layer, wherein the thickness of the rigid outer structural layer is 6mm, so that the manufacturing of the high-rigidity high-insulation composite sleeve is completed.
According to example 1, a highly rigid and highly insulating composite bushing having a hollow tube size of 50mm in an insulating inner liner was produced, and the effect of example 1 was demonstrated by experiments.
Through detection, the flexural rigidity coefficient of the high-rigidity high-insulation composite sleeve is as follows: 102 kgf.cm, an axial tensile strength of 326MPa, a dielectric constant (1 MHz): 4.8, breakdown voltage: insulation resistance after immersion at 46 kV/mm: 4.2X10 10 Ω。
The result shows that the obtained high-rigidity high-insulation composite sleeve has high rigidity, high strength and excellent insulation performance.
Claims (7)
1. The high-rigidity high-insulation composite sleeve is characterized in that an insulation lining layer, a rigid inner structural layer, an insulation rubber layer and a rigid outer structural layer are sequentially arranged from the innermost layer to the outermost layer; the insulating lining layer is formed by compounding polyvinyl chloride, modified rubber particles and azodicarbonamide; the rigid inner structural layer is formed by compounding epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles and mullite fiber needled felt; the insulating rubber layer is formed by adhering rubber cloth through epoxy resin adhesive; the rigid outer structural layer is formed by compounding epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles and glass fiber cloth.
2. The high-rigidity high-insulation composite bushing according to claim 1, wherein the modified rubber particles are modified ethylene propylene rubber particles, and the average particle size of the modified ethylene propylene rubber particles is 200-400nm.
3. The highly rigid, highly insulating composite bushing of claim 1 wherein said modified expanded perlite particles have an average particle size of 200-600nm.
4. The high-rigidity high-insulation composite sleeve according to claim 1, wherein the mullite fiber needled felt has a volume weight of 80-160kg/m 3 。
5. The high-rigidity high-insulation composite bushing according to claim 1, wherein the rubber cloth is formed by coating silicon rubber on a glass fiber cloth substrate and then calendaring, and has an average breakdown voltage of 20-50kV/mm.
6. The high-rigidity high-insulation composite sleeve according to claim 1, wherein the glass fiber cloth has a single weight of 300-500g/m 2 。
7. The method for preparing the high-rigidity high-insulation composite bushing according to claim 1, wherein the preparation process comprises the following steps:
(1) Soaking ethylene propylene rubber particles in 2-10 wt% concentration sodium hydroxide aqua for 12-24 hr, filtering, flushing the ethylene propylene rubber particles with clear water until the eluate is neutral, drying and sieving to obtain modified rubber particles;
(2) Respectively weighing polyvinyl chloride, modified rubber particles and azodicarbonamide according to the mass ratio of 100:8-16:1.2-1.6, uniformly mixing, and extruding to form a hollow tubular insulating lining layer, wherein the extrusion temperature is 175-185 ℃, and the thickness of the lining layer is 1-2mm;
(3) Respectively weighing water glass, deionized water and formamide according to the volume ratio of 100:300-500:1-3, uniformly mixing the water glass and the deionized water, stirring and reacting for 30-60min, regulating the pH of the solution to 1.0-1.6, then adding the formamide, stirring uniformly, and regulating the pH to 3.2-4.0 to obtain colloidal water glass; respectively weighing the expanded perlite and the colloidal water glass according to the mass ratio of 100:3-11, uniformly mixing, pressurizing to 5-15MPa, maintaining the pressure for 4-8 hours, and then sealing and aging in the air for 24-36 hours to obtain the water glass treated expanded perlite; respectively weighing trimethylchlorosilane, ethanol and n-hexane according to the volume ratio of 100:25-55:40-120, uniformly mixing to form a mixed solution, soaking water glass in the mixed solution to treat the expanded perlite to perform solvent replacement and surface modification, and finally respectively carrying out gradient drying for 3-5h and 6-8h at 70-80 ℃ and 170-180 ℃, cooling to room temperature and crushing to obtain modified expanded perlite particles; the Baume degree of the water glass is 43-45 degrees;
(4) Respectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles and mullite fiber needled felt according to the mass ratio of 100:10-12:12-18:10-20:40-60, uniformly mixing the epoxy resin, the polyethylene glycol diglycidyl ether and the modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, and uniformly coating on the surface of the mullite fiber needled felt to form a gummed needled felt;
(5) Tightly wrapping the gluing needled felt on the outer surface of the hollow tubular insulating lining layer by adopting a winding process, lightly extruding by using a compression roller, and removing bubbles to form a rigid inner structural layer, wherein the thickness of the rigid inner structural layer is 2-4mm;
(6) Winding a first layer of rubber cloth on the surface of the rigid inner structural layer, uniformly brushing a layer of epoxy resin adhesive on the surface of the rubber cloth, winding a second layer of rubber cloth on the surface of the epoxy resin adhesive, lightly extruding by using a compression roller to ensure that the two layers of rubber cloth are completely adhered together and tightly wrap the rigid inner structural layer to form an insulating rubber layer, wherein the thickness of the insulating rubber layer is 0.5-1.5mm;
(7) Respectively weighing epoxy resin, polyethylene glycol diglycidyl ether, diethylenetriamine, modified expanded perlite particles and glass fiber cloth according to the mass ratio of 100:10-12:12-18:5-9:60-80, uniformly mixing the epoxy resin, the polyethylene glycol diglycidyl ether and the modified expanded perlite particles, vacuumizing to remove bubbles, adding diethylenetriamine, uniformly stirring, and uniformly coating on the surface of the glass fiber cloth to form the rubberized glass fiber cloth;
(8) The adhesive-coated glass fiber cloth is tightly coated on the outer surface of the insulating rubber layer by adopting a winding process, and is lightly extruded by a compression roller to remove bubbles, so that a rigid outer structure layer is formed, and the thickness of the rigid outer structure layer is 3-7mm, thereby completing the manufacture of the high-rigidity high-insulation composite sleeve.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB563637A (en) * | 1943-02-17 | 1944-08-23 | Leonard William Ernest Townsen | Improvements in the manufacture of electrical insulating sleevings and braids |
| DE202011050486U1 (en) * | 2011-06-19 | 2011-10-13 | Viktor Schatz | insulating element |
| CN105623190A (en) * | 2014-11-05 | 2016-06-01 | 南京艾鲁新能源科技有限公司 | Novel insulation glue having good thermal conductivity |
| CN114196166A (en) * | 2021-12-27 | 2022-03-18 | 扬州润友复合材料有限公司 | Graphene modified epoxy resin-based composite material plate and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108263005A (en) * | 2017-01-03 | 2018-07-10 | 张晓冬 | A kind of novel mixing composite pipe and preparation method and application |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB563637A (en) * | 1943-02-17 | 1944-08-23 | Leonard William Ernest Townsen | Improvements in the manufacture of electrical insulating sleevings and braids |
| DE202011050486U1 (en) * | 2011-06-19 | 2011-10-13 | Viktor Schatz | insulating element |
| CN105623190A (en) * | 2014-11-05 | 2016-06-01 | 南京艾鲁新能源科技有限公司 | Novel insulation glue having good thermal conductivity |
| CN114196166A (en) * | 2021-12-27 | 2022-03-18 | 扬州润友复合材料有限公司 | Graphene modified epoxy resin-based composite material plate and preparation method thereof |
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| 40.5kV户外真空断路器用绝缘套管;舒国标;;电世界(第09期);全文 * |
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