CN113147117A - Multilayer heat insulation cover and preparation method thereof - Google Patents

Multilayer heat insulation cover and preparation method thereof Download PDF

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Publication number
CN113147117A
CN113147117A CN202110504787.5A CN202110504787A CN113147117A CN 113147117 A CN113147117 A CN 113147117A CN 202110504787 A CN202110504787 A CN 202110504787A CN 113147117 A CN113147117 A CN 113147117A
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China
Prior art keywords
layer
heat
parts
oxide
heat insulation
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CN202110504787.5A
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Chinese (zh)
Inventor
王洪生
杨丽娜
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Suzhou Puke Environmental Technology Co ltd
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Suzhou Puke Environmental Technology Co ltd
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Priority to CN202110504787.5A priority Critical patent/CN113147117A/en
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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
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/043—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • 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
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0076—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised in that the layers are not bonded on the totality of their surfaces
    • B32B37/0084—Point bonding
    • 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
    • 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
    • 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
    • B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • 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
    • 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
    • B32B7/05—Interconnection of layers the layers not being connected over the whole surface, e.g. discontinuous connection or patterned connection
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C13/00—Fibre or filament compositions
    • C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J127/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Adhesives based on derivatives of such polymers
    • C09J127/02—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J127/04—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Adhesives based on derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C09J127/06—Homopolymers or copolymers of vinyl chloride
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • D04H1/4218—Glass fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
    • F01N13/141—Double-walled exhaust pipes or housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/16—Selection of particular materials
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Exhaust Silencers (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention belongs to the technical field of heat shields, and particularly relates to a multilayer heat-insulating heat-preserving shield and a preparation method thereof. The heat insulation cover comprises an inner heat insulation layer and an outer stainless steel layer, wherein the heat insulation layer is composed of three layers of materials, namely a high silica fiber felt layer, an alkali-free glass fiber needled felt layer and an aluminum foil cloth layer from inside to outside; the heat-insulating layer is formed by bonding and connecting three layers of materials by adopting inorganic high-temperature glue, and the heat-insulating layer is bonded and connected with the exhaust manifold by adopting the inorganic high-temperature glue. The multilayer heat insulation cover provided by the invention has the following advantages: the innermost layer adopts high silica fiber felt, so that the temperature resistance is higher and can reach 900 ℃, and the application range is wider; the bonding part adopts inorganic high-temperature glue, and has bonding effect at high temperature, so that the integrity of the inner heat-insulating layer is ensured; the outermost stainless steel layer adopts the process of a corrugated point plate, which is more favorable for the effects of heat insulation and heat preservation.

Description

Multilayer heat insulation cover and preparation method thereof
Technical Field
The invention belongs to the technical field of heat shields, and particularly relates to a multilayer heat-insulating heat-preserving shield and a preparation method thereof.
Background
Exhaust gas in an exhaust system often carries a large amount of heat, and in order to protect devices which are not high in temperature and are close to the exhaust system, a heat insulation cover is usually arranged on an exhaust pipe. At present, a traditional heat insulation cover usually adopts a metal baffle heat insulation form or a multilayer cloth structure, the metal baffle occupies a large space, needs to be welded, is difficult to install and arrange, and has poor heat insulation effect; the surface of the multi-layer cloth structure is easy to scratch, the strength is not enough, the thickness is not uniform, and the multi-layer cloth structure is easy to fall off.
In order to solve the problem, the applicant develops a three-layer heat insulation cover through previous research, adopts a three-layer structure and replaces welding with a unique connection mode, simplifies the manufacturing process and enables the structure to be simpler and more flexible. This research result is disclosed in utility model patent CN 209743024U. The three-layer heat-insulation heat-preservation cover sequentially comprises glass fiber cloth, glass fiber cotton and aluminum foil cloth from inside to outside, the thickness range of the glass fiber cloth is 0.1mm-1mm, the thickness range of the glass fiber cotton is 2mm-20mm, the thickness range of the aluminum foil cloth is 0.1mm-1mm, and the three-layer heat-insulation heat-preservation cover is fixedly connected with an exhaust system through one of a buckle, a hoop, a steel wire or a snap fastener. The three-layer heat-insulating cover of the heat-insulating cover is made of glass fiber cloth with the thickness range of 0.1mm-1mm and glass fiber cotton with the thickness range of 2mm-20mm, so that the heat-insulating effect is ensured, and the outermost layer is made of thicker aluminum foil cloth, so that the three-layer heat-insulating cover is exquisite in appearance and not easy to scratch; 2) the heat shield and the object to be heat-insulated and heat-insulated are fixed by the buckles, the hoops or the snap fasteners, so that the welding step is omitted, the stability of the heat shield is ensured, and the process steps are also saved; 3) the spirally arranged snap fasteners can generate torsion, so that the stability of the heat insulation cover is further improved, and the adhesion between the heat insulation cover and an object to be heat insulated is larger. However, in the production practice, it is found that the exhaust manifold generates high temperature when the engine works, the highest temperature can reach 650-750 ℃, meanwhile, the exhaust manifold generates vibration when the engine works, and if the three heat insulation layers of the inner layer are not fixed, the heat insulation layers fall down due to vibration and are stacked at the lowest part, so that the heat insulation effect is lost.
In order to solve this problem, researchers have devised methods of fixing with fastening devices, conventional adhesive bonding, and the like. However, these methods are not beautiful and cannot meet the customer requirements, or they have problems of poor firmness and short service life.
Disclosure of Invention
In order to solve the above problems in the prior art, an object of the present invention is to provide a multi-layer heat insulation cover, which can be directly fixed to a solid to be heat insulated by adjusting the materials and the ratio of the multi-layer heat insulation cover, and can resist high temperature by using a high silica fiber felt as the innermost layer. The heat insulation cover provided by the invention has the excellent performances of attractive appearance and good stability.
The invention also aims to provide a preparation method of the multilayer heat insulation cover.
In order to realize the aim, the invention discloses a multi-layer heat-insulating cover which comprises an inner layer heat-insulating layer and an outer layer stainless steel layer, wherein the heat-insulating layer is composed of three layers of materials, namely a high silica fiber felt layer, an alkali-free glass fiber needled felt layer and an aluminum foil cloth layer; the heat-insulating layer is formed by bonding and connecting three layers of materials by adopting inorganic high-temperature glue, and the heat-insulating layer is bonded and connected with the exhaust manifold by adopting the inorganic high-temperature glue.
Preferably, the high-silica fiber felt layer contains essentially the following components: silica, alumina and calcium oxide, wherein the content of the silica is more than or equal to 96 percent.
Further preferably, the high silica fiber felt layer mainly contains the following components: the contents of silicon dioxide, aluminum oxide and calcium oxide are respectively 96-98%, 0.2-0.8%, 0.5-1.1%, and the balance of impurities.
Preferably, the thickness of the high silica fiber felt layer is 2-3 mm.
Preferably, the thermal conductivity of the high silica fiber felt layer is 0.027W/(m × k) -0.032W/(m × k).
Preferably, the high silica fiber felt layer is prepared by the following method: the method comprises the steps of taking pyrophyllite, quartz sand, limestone, dolomite, borocalcite and boromagnesite as raw materials according to the ratio of 1:1:1:1:1:1, putting the batch mixture into a kiln, melting at 1300-1500 ℃, pickling, purifying to obtain high silica glass balls, adding the prepared high silica glass balls into a drawing furnace for melting, drawing at high speed to obtain high silica glass fiber protofilaments, and needling the protofilaments to obtain the high silica fiber felt. The highest temperature resistance of the high silica fiber felt is controlled by purifying and adjusting the proportion of the silicon dioxide, when the content of the silicon dioxide is lower than 90 percent, the temperature resistance is lower than 800 ℃, when the content of the silicon dioxide is between 90 and 96 percent, the temperature resistance is 900 ℃ at 800 ℃, and when the content of the silicon dioxide is more than 96 percent, the temperature resistance is 1000 ℃.
The high silica fiber felt provided by the invention can resist the temperature of 900-1000 ℃.
Preferably, the alkali-free glass fiber needled felt layer mainly comprises the following components: silica, alumina, calcium oxide, magnesium oxide, boron oxide, sodium oxide, potassium oxide, titanium dioxide, and ferric oxide.
Further preferably, the content of silica in the alkali-free glass fiber needled felt layer is 52-56%.
Further preferably, the content of each component in the alkali-free glass fiber needled felt layer is 52-56% of silicon dioxide, 12-16% of aluminum oxide, 16-25% of calcium oxide, 0-6% of magnesium oxide, 8-13% of boron oxide, 0-0.8% of sodium oxide and potassium oxide, 0-0.4% of titanium dioxide and 0.05-0.4% of ferric oxide.
The preparation method of the alkali-free glass fiber needled felt comprises the following steps: the method comprises the steps of taking pyrophyllite, quartz sand, limestone, dolomite, borocalcite and boromagnesite as raw materials according to the ratio of 1:1:1:1:1:1, putting the batch mixture into a kiln, melting at 1300-1500 ℃, pickling, purifying to obtain glass fiber balls, putting the prepared glass balls into a wire drawing furnace for melting, drawing at high speed to obtain glass fiber yarns, needling the carded chopped glass fibers by using felting needles, and mutually intertwining the fibers among the glass fibers of the felt layer and the reinforcing glass fiber base cloth by using a mechanical method to obtain the felt-shaped fiber web. The content of silicon dioxide in the alkali-free glass fiber needled felt is controlled to be 52-56%.
Further preferably, the alkali-free glass fiber needled felt layer has a thermal conductivity of 0.030W/(m k) -0.034W/(m k).
Further preferably, the thickness of the alkali-free glass fiber needled felt layer is 6-12 mm.
Preferably, the thickness of the aluminum foil cloth layer is 0.22-0.45 mm.
Preferably, the material of the outer stainless steel layer is 304 stainless steel corrugated board with the thickness of 0.15-0.2 mm. The stainless steel flat plate is pressed with wave points, the wave points are used for storing air, the heat conductivity coefficient of the air is extremely low and is only 0.023W/(m x k), so that a small amount of air is mixed in the heat insulation layer, and the heat insulation effect can be achieved.
The stainless steel layer consists of a front exhaust manifold heat-insulation cover and a rear exhaust manifold heat-insulation cover, the front exhaust manifold heat-insulation cover and the rear exhaust manifold heat-insulation cover consist of two parts, and the two parts of the front row and the rear row are in lap joint and welded connection with each other.
Preferably, the inorganic high-temperature adhesive comprises the following components in parts by weight: 30-50 parts of water glass, 6-8 parts of glycerol and 62-68 parts of sizing material; 10-12 parts of glycidyl ester epoxy resin, 8-11 parts of methyl vinyl silicone rubber, 100-120 parts of deionized water and 10-15 parts of aluminum silicate ceramic fiber.
Preferably, the preparation method of the inorganic high-temperature adhesive comprises the following steps:
s1, adding water glass, sizing material, glycidyl ester epoxy resin and methyl vinyl silicone rubber into deionized water according to the formula ratio, fully and fully stirring and mixing, and dripping glycerol to prepare a mixed solution A;
s2 adding alumina silicate ceramic fiber into the mixed liquid A, and stirring at the speed of 500-800r/min until the mixture is uniform.
The inorganic high-temperature adhesive provided by the invention can resist the temperature of 600-700 ℃.
The invention also provides a preparation method of the multilayer heat insulation cover, which comprises the following steps:
step 1, respectively cutting according to the size of a wrapped object to obtain a high silica fiber felt, an alkali-free glass fiber needled felt and an aluminum foil cloth with corresponding sizes;
step 2, sequentially bonding and connecting a high silica fiber felt layer, an alkali-free glass fiber needled felt layer and an aluminum foil cloth layer by using inorganic high-temperature glue, and wrapping the heat-insulating layer on the exhaust manifold by using the inorganic high-temperature glue; wherein the high silica fiber felt is positioned on the inner side;
and 3, welding the stainless steel layer to the wrapped object.
Advantageous effects
Compared with the existing product, the multilayer heat insulation cover provided by the invention has the following advantages:
(1) the innermost layer adopts high silica fiber felt, so that the temperature resistance is higher and can reach 900 ℃, and the application range is wider;
(2) the bonding part adopts inorganic high-temperature glue, still has bonding effect at high temperature, and ensures the integrity of the inner heat-insulating layer;
(3) the outermost stainless steel layer adopts a process of a corrugated point plate, so that the heat insulation effect is better facilitated;
(4) the stainless steel layers adopt the processes of lapping and spot welding, the operation is simple, and the appearance is exquisite.
Detailed Description
The technical solution of the present invention will be described in detail by the following specific examples.
Example 1
The utility model provides a thermal-insulated heat preservation cover, the skin is 304 stainless steel wave point boards, and thickness is 0.15mm, and inlayer thermal-insulated heat preservation comprises following three-layer material: the high silica fiber felt layer is 2mm, the alkali-free glass fiber needled felt layer is 6mm, the aluminum foil cloth layer is 0.22mm, and the heat insulation and heat preservation layers are adhered to each other by inorganic high-temperature adhesive and then adhered to the exhaust manifold.
The inorganic high-temperature adhesive comprises 40 parts of water glass, 60 parts of sizing material (the main component is polyvinyl chloride resin, the purchase manufacturer is Jiangsutachu chemical industry Co., Ltd., the model is P450), 10 parts of glycidyl ester epoxy resin (the purchase manufacturer is Shanghai ethyl chemical industry Co., Ltd., the model is 106-91-10), 10 parts of methyl vinyl silicone rubber (the purchase manufacturer is silicone rubber, the purchase manufacturer is Tasman Tianshu silica gel technology Co., Ltd., Dongguan), 100 parts of deionized water, 6 parts of glycerol and 10 parts of aluminum silicate ceramic fiber (the purchase manufacturer is STD common type, the purchase manufacturer is Tankexin ceramic new material Co., Ltd., Suzhou).
The preparation method of the inorganic high-temperature adhesive comprises the following steps: s1, adding water glass, sizing material, glycidyl ester epoxy resin and methyl vinyl silicone rubber into deionized water according to the formula ratio, fully stirring and mixing, and dripping glycerol to prepare a mixed solution A;
s2 adding alumina silicate ceramic fiber into the mixed liquid A, stirring at the speed of 500-800r/min for 2-3h, and stopping for later use.
The contents of silicon dioxide, aluminum oxide and calcium oxide in the high silica fiber felt layer are respectively 98%, 0.3% and 0.5%, and the balance is impurities.
The preparation method of the high silica fiber felt layer comprises the following steps: the method comprises the steps of taking pyrophyllite, quartz sand, limestone, dolomite, borocalcite and boromagnesite as raw materials according to the ratio of 1:1:1:1:1:1, putting the batch mixture into a kiln, melting at the temperature of 1300 plus one year of heat and 1500 ℃, pickling, purifying to obtain high silica glass balls, adding the prepared high silica glass balls into a drawing furnace for melting, drawing at high speed to obtain high silica glass fiber protofilaments, and needling the protofilaments to obtain the high silica fiber felt.
The content of each component in the alkali-free glass fiber needled felt layer is 55% of silicon dioxide, 15% of aluminum oxide, 16% of calcium oxide, 3.3% of magnesium oxide, 10% of boron oxide, 0.1% of sodium oxide, 0.4% of titanium dioxide and 0.2% of ferric oxide.
The preparation method of the alkali-free glass fiber needled felt comprises the following steps:
the method comprises the steps of taking pyrophyllite, quartz sand, limestone, dolomite, borocalcite and boromagnesite as raw materials according to the ratio of 1:1:1:1:1:1, putting the batch mixture into a kiln, melting at the temperature of 1300 plus one year of heat and 1500 ℃, pickling, purifying to obtain glass fiber balls, putting the prepared glass balls into a wire drawing furnace for melting, drawing at high speed to obtain glass fiber yarns, needling the carded chopped glass fibers by using felting needles, and mutually intertwining the fibers among the glass fibers of the felt layer and the base cloth of the reinforced glass fibers by using a mechanical method to obtain the felt-shaped fiber web.
The preparation method of the multilayer heat insulation cover comprises the following steps:
step 1, respectively cutting according to the size of a wrapped object to obtain a high silica fiber felt, an alkali-free glass fiber needled felt and an aluminum foil cloth with corresponding sizes;
step 2, sequentially bonding and connecting a high silica fiber felt layer, an alkali-free glass fiber needled felt layer and an aluminum foil cloth layer by using inorganic high-temperature glue, and wrapping the heat-insulating layer on the exhaust manifold by using the inorganic high-temperature glue; wherein the high silica fiber felt is positioned on the inner side;
and 3, welding the stainless steel layer on the wrapped object.
Example 2
A heat-insulating cover which is different from embodiment 1 in that: the inorganic high-temperature adhesive comprises the following components in parts by weight: 50 parts of water glass, 8 parts of glycerol, 62 parts of sizing material (the main component of the sizing material is polyvinyl chloride resin, the manufacturer is Jiangsu TaiChu chemical industry Co., Ltd., the model is P450), 10 parts of glycidyl ester epoxy resin (the manufacturer is Shanghai ethyl chemical industry Co., Ltd., the model is 106-91-10), 8 parts of methyl vinyl silicone rubber (the manufacturer is silicone rubber which is a commercial model of Tianshu silica gel technology Co., Ltd., Dongguan city), 100 parts of deionized water and 15 parts of aluminum silicate ceramic fiber.
Example 3
A heat-insulating cover which is different from embodiment 1 in that: the content of each component in the alkali-free glass fiber needled felt layer is 56% of silicon dioxide, 16% of aluminum oxide, 19.6% of calcium oxide, 8% of boron oxide and 0.4% of ferric oxide.
Example 4
A heat-insulating cover which is different from embodiment 1 in that: the inner heat insulation layer consists of the following three materials: 3mm of high silica fiber felt layer, 10mm of alkali-free glass fiber needled felt layer and 0.45mm of aluminum foil cloth layer.
Example 5
A heat insulation cover is different from the heat insulation cover in the embodiment 1 in that the outer layer is a 304 stainless steel corrugated point plate, and the thickness is 0.2 mm.
Example 6
A heat-insulating cover which is different from embodiment 2 in that: the inorganic high-temperature adhesive comprises the following components in parts by weight: 50 parts of water glass, 8 parts of glycerol, 68 parts of sizing material (the main component of the sizing material is polyvinyl chloride resin, the manufacturer is Jiangsu TaiChu chemical industry Co., Ltd., the model is P450), 12 parts of glycidyl ester epoxy resin (the manufacturer is Shanghai ethyl chemical industry Co., Ltd., the model is 106-91-10), 11 parts of methyl vinyl silicone rubber, 120 parts of deionized water and 15 parts of aluminum silicate ceramic fiber.
Example 7
A heat-insulating cover which is different from embodiment 1 in that: the contents of silicon dioxide, aluminum oxide and calcium oxide in the high silica fiber felt layer are respectively 95%, 2.5% and 2.3%, and the balance is impurities.
Example 8
A heat-insulating cover which is different from embodiment 1 in that:
the inorganic high-temperature adhesive comprises 40 parts of water glass, 60 parts of sizing material (the main component of the sizing material is polyvinyl chloride resin, the manufacturer is Jiangsu Taichu chemical industry Co., Ltd., the model is P450), 10 parts of glycidyl ester epoxy resin (the manufacturer is Shanghai Ethyl chemical industry Co., Ltd., the model is 106-91-10), 10 parts of methyl vinyl silicone rubber (the manufacturer is silicone rubber, the model is a commercial product of Tianshui silica gel technology Co., Ltd., Dongguan city), 100 parts of deionized water and 6 parts of glycerol,
comparative example 1
A heat insulation cover is different from the heat insulation cover in the embodiment 1 in that the outer layer is an aluminum plate and the thickness is 1 mm.
Experiment of temperature preservation
The test procedure was as follows:
1. sequentially bonding and connecting the high silica fiber felt layer, the alkali-free glass fiber needled felt layer and the aluminum foil cloth layer, and wrapping the heat-insulating layer on the exhaust manifold by adopting inorganic high-temperature glue
2. Welding outer stainless steel to the exhaust manifold
3. An exhaust manifold is arranged on a laboratory bench, and temperature sensors are arranged at the front end and the rear end
4. Recording the temperature of the inlet and outlet respectively
The results are shown in Table 1 below.
TABLE 1
Group of Intake air temperature (. degree. C.) Temperature of gas discharged (. degree. C.) Temperature difference (. degree. C.)
Example 1 281 268 13
Example 2 280 267 13
Example 3 282 270 12
Example 4 281 272 9
Example 5 279 267 12
Example 6 280 267 13
Example 7 279 264 15
Example 8 278 258 20
Comparative example 1 276 246 30
The temperature difference is the air inlet temperature-air outlet temperature, and the smaller the temperature difference is, the better the heat preservation effect is. The experimental result shows that the heat preservation effect of the aluminum silicate ceramic fiber added in the inorganic high-temperature adhesive component is good, and the thicker the stainless steel and the inner layer material are, the better the heat preservation effect is.
Experiment of thermal insulation
The test procedure was as follows:
1. sequentially bonding and connecting the high silica fiber felt layer, the alkali-free glass fiber needled felt layer and the aluminum foil cloth layer, and wrapping the heat-insulating layer on the exhaust manifold by adopting inorganic high-temperature glue
2. Welding outer stainless steel to exhaust manifold
3. An exhaust manifold is arranged on an experiment bench, and a temperature sensor is arranged on the surface of a heat insulation layer
4. Separately recording the surface temperature of the exhaust manifold and the heat-insulating cover
The results of the insulation experiments are given in table 2 below.
TABLE 2
Figure BDA0003057963190000071
The lower the surface temperature of the heat insulation cover is, the better the heat insulation effect of the heat insulation cover is, and the experiment result shows that the heat insulation effect is good when aluminum silicate ceramic fibers are added into the inorganic high-temperature glue component, and the thicker the thicknesses of the stainless steel and the inner layer material are, the better the heat insulation effect is; adopt the aluminum plate of 1mm thick, thermal-insulated effect obviously worsens.
Tensile and peeling test of inorganic high-temperature adhesive
The experimental method is as follows:
preparing inorganic high-temperature adhesive according to a formula, putting the inorganic high-temperature adhesive into a high-temperature test box, raising the temperature to 500 ℃, and respectively measuring the tensile strength and the peel strength by using a universal testing machine and a peel strength tester.
The results are shown in Table 3 below.
TABLE 3
Figure BDA0003057963190000072
Figure BDA0003057963190000081
From the experimental results, it can be seen that the tensile strength and peel strength are poor at high temperature without adding the alumina silicate ceramic fiber.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, so any modifications, equivalents, improvements and the like made within the spirit of the present invention should be included in the scope of the present invention.

Claims (10)

1. A multi-layer heat insulation cover comprises an inner layer heat insulation layer and an outer layer stainless steel layer, wherein the heat insulation layer is composed of three layers of materials, namely a high silica fiber felt layer, an alkali-free glass fiber needled felt layer and an aluminum foil cloth layer in sequence from inside to outside; the heat-insulating layer is formed by bonding and connecting three layers of materials by adopting inorganic high-temperature glue, and the heat-insulating layer is bonded and connected with the exhaust manifold by adopting the inorganic high-temperature glue.
2. The multi-layer heat shield of claim 1, said high silica fiber felt layer being made essentially of: silica, alumina and calcium oxide, wherein the content of the silica is more than or equal to 96 percent.
3. The multi-layer heat shield of claim 1, said alkali-free fiberglass needled felt layer being made from: silica, alumina, calcium oxide, magnesium oxide, boron oxide, sodium oxide, potassium oxide, titanium dioxide, and ferric oxide.
4. The multi-layer heat-insulating cover according to claim 3, wherein the alkali-free glass fiber needled felt layer comprises 52-56% of silicon dioxide, 12-16% of aluminum oxide, 16-25% of calcium oxide, 0-6% of magnesium oxide, 8-13% of boron oxide, 0-0.8% of sodium oxide and potassium oxide, 0-0.4% of titanium dioxide and 0.05-0.4% of ferric oxide.
5. The multi-layer heat shield of claim 1, said alkali-free glass fiber needled felt layer having a thickness of 6-12 mm.
6. The multi-layer heat insulating cover of claim 1, wherein the aluminum foil cloth layer has a thickness of 0.22-0.45 mm.
7. The multi-layer heat-insulating cover as claimed in claim 1, wherein the outer stainless steel layer is made of 304 stainless steel corrugated board with a thickness of 0.15-0.2 mm.
8. The multilayer heat insulating cover according to claim 1, wherein the inorganic high temperature glue comprises the following components in parts by weight: 30-50 parts of water glass, 6-8 parts of glycerol, 62-68 parts of sizing material, 10-12 parts of glycidyl ester epoxy resin, 8-11 parts of methyl vinyl silicone rubber, 120 parts of deionized water and 10-15 parts of aluminum silicate ceramic fiber.
9. The multilayer heat shield according to claim 8, wherein the inorganic high temperature glue is prepared by a method comprising the following steps:
s1, adding water glass, sizing material, glycidyl ester epoxy resin and methyl vinyl silicone rubber into deionized water according to the formula ratio, fully stirring and mixing, and dripping glycerol to prepare a mixed solution A;
s2 adding alumina silicate ceramic fiber into the mixed liquid A, and stirring at the speed of 500-800r/min until the mixture is uniform.
10. A method of making a multi-layer heat shield as claimed in any one of claims 1 to 9, comprising the steps of:
step 1, respectively cutting according to the size of a wrapped object to obtain a high silica fiber felt, an alkali-free glass fiber needled felt and an aluminum foil cloth with corresponding sizes;
step 2, sequentially bonding and connecting a high silica fiber felt layer, an alkali-free glass fiber needled felt layer and an aluminum foil cloth layer by using inorganic high-temperature glue, and wrapping the heat-insulating layer on the exhaust manifold by using the inorganic high-temperature glue; wherein the high silica fiber felt is positioned on the inner side;
and 3, welding the stainless steel layer to the wrapped object.
CN202110504787.5A 2021-05-10 2021-05-10 Multilayer heat insulation cover and preparation method thereof Pending CN113147117A (en)

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CN113619214A (en) * 2021-08-13 2021-11-09 重庆康明斯发动机有限公司 Supercharger heat shield of high-speed diesel engine and preparation method thereof
CN114575033A (en) * 2021-12-21 2022-06-03 陕西华特新材料股份有限公司 Glass fiber mixed needled felt and manufacturing method thereof
CN115384131A (en) * 2022-08-12 2022-11-25 安徽省瑞欧新型材料有限公司 Keep away hot protector curtain
CN116811366A (en) * 2023-07-07 2023-09-29 苏州骏鼎达新材料科技有限公司 Open aluminum foil tube, preparation device and preparation method of open aluminum foil tube

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CN113619214A (en) * 2021-08-13 2021-11-09 重庆康明斯发动机有限公司 Supercharger heat shield of high-speed diesel engine and preparation method thereof
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CN116811366B (en) * 2023-07-07 2024-02-27 苏州骏鼎达新材料科技有限公司 Open aluminum foil tube, preparation device and preparation method of open aluminum foil tube

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