CN111911747B - Seawater-soaking-resistant heat-insulation structure and preparation method thereof - Google Patents

Seawater-soaking-resistant heat-insulation structure and preparation method thereof Download PDF

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CN111911747B
CN111911747B CN202010661347.6A CN202010661347A CN111911747B CN 111911747 B CN111911747 B CN 111911747B CN 202010661347 A CN202010661347 A CN 202010661347A CN 111911747 B CN111911747 B CN 111911747B
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insulating layer
heat
section
waterproof cloth
heat preservation
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CN111911747A (en
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吴护林
李忠盛
蒋龙
刘海鹏
肖坤建
杨钊
黄安畏
王征辉
周富
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No 59 Research Institute of China Ordnance Industry
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No 59 Research Institute of China Ordnance Industry
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/067—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of fibres or filaments
    • 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
    • B32B19/00—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica
    • B32B19/06—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica 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
    • B32B19/00—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica
    • B32B19/08—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica comprising asbestos
    • 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 form; Layered products having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • B32B3/085—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts spaced apart pieces on the surface of a 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
    • 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
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • 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
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/047—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material made of fibres or filaments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/027—Bands, cords, strips or the like for helically winding around a cylindrical object
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/028—Composition or method of fixing a thermally insulating material
    • 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

Abstract

A seawater soaking resistant heat insulation structure comprises an inner heat insulation layer (005), an outer heat insulation layer (004), a spiral winding belt and a surface coating in sequence from inside to outside; wherein interior heat preservation (005) and outer heat preservation (004) divide into a plurality of segments and constitute, and every segment surface has the sealed waterproof cloth cover of one deck respectively, spiral winding area is tailor into banding waterproof cloth (002) with above-mentioned glass fiber cloth, and 1 sealing strip (001) has been put respectively on the width both sides of every waterproof cloth, forms the winding area and takes heat preservation (004) surface spiral winding and mutual blank pressing outside, forms spiral winding area. This structure prevents that the sea water from soaking insulation material, improves thermal-insulated thermal insulation performance, reduces the heat leak of butt joint position to provide certain flexible volume, effectively cooperate the pipeline expend with heat and contract with cold, improve insulation construction's life.

Description

Seawater-soaking-resistant heat-insulation structure and preparation method thereof
Technical Field
The invention relates to the technical field of heat insulation materials, in particular to a seawater soaking resistant heat insulation structure and a preparation method thereof.
Background
In order to reduce the heat dissipation loss on the surface of the high-temperature pipeline, reduce energy consumption, reduce the environmental temperature and avoid scalding personnel, a layer of heat insulation material is often coated outside the high-temperature pipeline. The commonly used heat insulation materials are glass fiber, asbestos, rock wool, silicate, aerogel felt and the like. In ocean engineering, pipelines can be soaked by seawater, but the heat-insulating material is generally in a porous structure, liquid enters pores after being soaked by the seawater, and the heat-insulating performance is sharply reduced. After the water level reduces, the sea water that the hole was absorbed lasts and the pipeline contact, can aggravate the pipeline corrosion, and the acid steam that the sea water formed after being heated can aggravate the corruption ageing of equipment instrument on every side, shortens life. Meanwhile, under the action of heat, the length of the pipeline expands with heat and contracts with cold, so that the seawater soaking resistant heat insulation structure needs to have a certain free expansion amount.
Disclosure of Invention
The invention aims to provide a seawater soaking resistant heat insulation structure.
The invention also aims to provide a preparation method of the seawater soaking resistant heat insulation structure.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a resistant sea water soaks insulation construction which characterized in that: the inner heat-insulating layer, the outer heat-insulating layer, the spiral winding belt and the surface coating are sequentially arranged from inside to outside; the inner heat-insulating layer and the outer heat-insulating layer are both made of glass fiber, asbestos, silicate or aerogel felt and are divided into a plurality of sections, the surface of each section is provided with a layer of sealed waterproof cloth cover, and the waterproof cloth cover is glass fiber cloth coated with a waterproof layer; the spiral winding area is tailor into banding waterproof cloth with above-mentioned glass fiber cloth, and 1 sealing strip has been put respectively to the width both sides of every waterproof cloth, and the direction is parallel with waterproof cloth length limit, and waterproof cloth is at heat preservation surface spiral winding and mutual blank pressing, and blank pressing width is 1/3~1/2 of waterproof cloth width, compresses tightly each other between sealing strip and the waterproof cloth and forms spiral winding area.
After the spiral winding area is sealed effectively, seawater is prevented from entering the structure along the installation seam, the relative sliding between the inner and outer heat-insulating layers is not hindered, and the uniform stretching of the heat-insulating layer is effectively realized.
The seawater-soaking-resistant heat-insulation structure sequentially combines the waterproof cloth sleeve, the spiral winding belt and the surface coating layer by layer, so that the overall sealing performance of the heat-insulation structure is improved, heat leakage is reduced, the heat-insulation structure is prevented from being eroded by seawater, and the service life of the heat-insulation structure is prolonged.
Further, the axial splicing seam of the inner heat-insulating layer and the outer heat-insulating layer is in a bevel shape with a short inside and a long outside, and the bevel angle is within 90 degrees taking a horizontal line as a symmetry axis.
Through the beveling installation seam, the area of the tangent plane is increased, so that the heat insulation reflection performance is improved, the heat transfer path is prolonged, the heat transfer is further relieved, the heat propagation along the splicing seam is blocked by staggered splicing, the heat loss is reduced, and the overlarge stress generated in beveling is avoided.
Furthermore, the two sides of the sealing strip and the waterproof cloth strip are bonded and fixed by adopting a sealant, and the sealant is composed of phenyl silicone rubber and an additive TiO2Mixing the components according to the mass ratio of 15: 1.
Furthermore, the length of each small section of the inner heat-insulating layer is more than 150cm, the length of each small section of the outer heat-insulating layer is more than 150cm, and the thickness of the inner heat-insulating layer and the outer heat-insulating layer is 1: 1.
Furthermore, sealing rings are distributed between the inner heat-insulating layer and the outer heat-insulating layer and are positioned at the lap joint position of each small section of the outer heat-insulating layer and the inner heat-insulating layer.
Further, the waterproof layer coated on the surface of the glass fiber cloth is specifically a silicone rubber waterproof coating.
The preparation method of the seawater soaking resistant heat insulation structure is characterized by comprising the following steps: according to the pipeline size, cutting heat-insulating materials to manufacture a tubular inner heat-insulating layer and a tubular outer heat-insulating layer, dividing the inner heat-insulating layer and the outer heat-insulating layer into small sections larger than 150mm, sleeving waterproof cloth sleeves with the same outline, installing the inner heat-insulating layers section by section, then installing the inner heat-insulating layers section by section, finally installing spiral winding tapes on the surface of the outer heat-insulating layer, specifically cutting waterproof glass fiber cloth into strips, adhering sealing strips on two sides of the width of the strips by using a sealant, enabling the direction of the strips to be parallel to the long sides of the strips, forming winding tapes, forming spiral winding of mutual blank pressing on the surface of the outer heat-insulating layer by using the winding tapes, enabling the blank pressing length to be 1/3-1/2 of the winding tape width, enabling the sealing strips and the damp-proof cloth to be mutually pressed, and forming the spiral winding tapes.
Further, the waterproof cloth cover is characterized in that the tubular heat-insulating layer is cut into a plurality of groups of small sections with the length larger than 150cm, installation seams are formed in the axial direction of the small sections of the heat-insulating layer, the tangent planes of the installation seams are in a beveling shape, the positions of the joints are gradually reduced from inside to outside above the horizontal diameter, the lower side of the horizontal diameter is gradually increased from the inside to the outside, the beveling angle is within 90 degrees of the symmetry axis of the horizontal line, the axial installation seams between the two adjacent small sections are vertically staggered, the axial installation seams of the inner heat-insulating layer and the outer heat-insulating layer are vertically staggered, the cloth cover with the same profile is made of glass fiber cloth coated with the waterproof layer according to the profile of each small section, one end of the cloth cover is not sealed, the small sections of the heat-insulating layer are loaded into the waterproof cloth cover from the non-sealed end, and then the waterproof cloth cover is sealed.
Further, the pipeline surface is installed section by section to the above-mentioned interior heat preservation segment that has overlapped waterproof cloth cover, and the seam crossing between section and the section adopts the sealant bonding to seal, forms complete interior heat preservation, then installs outer heat preservation segment section by section on the surface of the interior heat preservation layer of accomplishing of installation, adopts the sealant bonding to seal between section and the section, and the seam between outer heat preservation layer section and the section is installed with the seam stagger between interior heat preservation layer section and the section.
Furthermore, before the outer heat-insulating layer is installed, a sealing ring is installed on the surface of the inner heat-insulating layer section, and the sealing ring is located at the lap joint position of each small section of the outer heat-insulating layer and the inner heat-insulating layer.
The multistage structure combines the wrong joint concatenation, and the installation of sealing washer, the heat leakage loss of seam crossing has been reduced, thermal-insulated heat preservation effect has been improved, in addition, the existence of sealing washer, the resistance at thermal energy in-process relative slip between interior heat preservation and the outer heat preservation has been reduced, the spiral winding band structure of the mutual blank pressing of reunion, the holistic leakproofness of structure has both been guaranteed, the pipeline is at expend with heat and contract with cold in-process again, each layer of structure can both effectively be adjusted and stretch out and draw back, uniform variation, the structural stability in the heat preservation structure long-term use has been guaranteed.
Most specifically, the preparation method of the seawater soaking resistant heat insulation structure is characterized by comprising the following steps:
s1: preparing a main body heat insulation material into a tubular inner heat insulation layer and a tubular outer heat insulation layer according to the size of a pipeline, and cutting the main body heat insulation material into a multi-section structure, wherein the length of each section is more than 150cm, and the main body heat insulation material is glass fiber, asbestos, silicate or aerogel felt;
s2: according to the shape of each segment of the tubular heat-insulating layer, the corresponding waterproof cloth cover is made of waterproof cloth, one end of the cloth bag is not sealed, the tubular heat-insulating layer is arranged in the waterproof cloth cover from the unsealed end, then the waterproof cloth cover is sealed, and the sealed position is sealed by using a sealant, wherein the sealant is formed by phenyl silicone rubber and additive TiO2Mixing according to the mass ratio of 15: 1;
s3: installing the small sections of the inner heat-insulating layer sleeved with the waterproof cloth sleeve on the surface of a pipeline section by section, bonding and sealing joints between the sections by sealant to form a complete inner heat-insulating layer, then installing small sections of an outer heat-insulating layer section by section on the surface of the installed inner heat-insulating layer, bonding and sealing the sections by sealant, installing the joints between the sections of the outer heat-insulating layer and the joints between the sections of the inner heat-insulating layer in a staggered manner, installing sealing rings on the surfaces of the inner heat-insulating layer, and positioning the sealing rings at the lap joint positions of the inner heat-insulating layer and the outer heat-insulating layer of each section;
s4: cutting waterproof glass fiber cloth into strips, adhering sealing strips to two sides of the width of each cloth strip by using a sealant, wherein the direction of each sealing strip is parallel to the long side of each cloth strip to form a winding strip, forming spiral winding of mutual edge pressing on the surface of an outer heat-insulating layer by using the winding strip, wherein the length of the edge pressing is 1/3-1/2 of the width of the winding strip, and the sealing strips and the waterproof cloth strips are mutually pressed;
s5: and after winding is finished, coating a layer of silicone rubber waterproof coating on the outermost layer of the spiral winding belt.
The invention has the following technical effects:
(1) and the seawater is prevented from soaking the heat-insulating material, so that the heat-insulating performance is improved.
(2) The heat leakage of the butt joint position is reduced, a certain telescopic amount is provided, and the expansion caused by heat and the contraction caused by cold of the pipeline are effectively matched.
(3) The sealing ring between the inner layer and the outer layer can prevent seawater from entering along the installation seam after the outer layer winding belt is sealed and actually effective, the relative sliding resistance between the inner layer and the outer layer is reduced, the uniform expansion and contraction of the heat insulation material following pipeline is ensured, and the service life of the heat insulation structure is prolonged.
(4) In, the winding area of blank pressing winding, form the structure that sticiss each other between sealing strip and the tarpaulin, blockked inside the sea water entering structure, avoided inner structure by oxidation corrosion, and along with pipeline and inside insulation material's expend with heat and contract with cold self-regulation adaptation.
Drawings
FIG. 1: the invention relates to a structure diagram between sections of an insulating layer.
FIG. 2: the invention is a schematic diagram of each layer structure.
Wherein, 001-sealing strip, 002-waterproof cloth belt, 003-sealing ring, 004-outer insulating layer, 005-inner insulating layer and 006-pipe wall.
FIG. 3: the winding of the spirally wound strip of the invention is schematically illustrated.
FIG. 4: the invention discloses a beveling schematic diagram of an inner insulating layer and an outer insulating layer.
Detailed Description
The present invention is described in detail below by way of examples, it should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and those skilled in the art can make some insubstantial modifications and adaptations of the present invention based on the above-mentioned disclosure.
Example 1
A seawater soaking resistant heat insulation structure, in particular to a structure with the external diameter of 165mm and the external surface temperature of 200 ℃,
an inner heat-insulating layer 005, an outer heat-insulating layer 004, a spiral winding belt and a surface coating are sequentially arranged from inside to outside; the inner heat-insulating layer 005 and the outer heat-insulating layer 004 are both made of glass fiber, asbestos, silicate or aerogel felt, the thickness of each of the inner heat-insulating layer 005 and the outer heat-insulating layer 004 is 25mm, the inner heat-insulating layer 005 and the outer heat-insulating layer 004 are divided into a plurality of small sections, the surface of each small section is provided with a layer of sealed waterproof cloth cover, and the waterproof cloth cover is glass fiber cloth coated with a waterproof layer; the spiral winding area is tailor into banding waterproof cloth 002 with above-mentioned glass fiber cloth, and 1 sealing strip 001 has been put respectively on the width both sides of every waterproof cloth 002, and the direction is parallel with waterproof cloth length limit, and waterproof cloth 002 is at outer heat preservation 004 surface spiral winding and mutual blank pressing, and blank pressing length is 1/3~1/2 of waterproof cloth width, compresses tightly each other between sealing strip 001 and the waterproof cloth 002 and forms the spiral winding area. Sealing rings 003 are distributed between the inner insulating layer 005 and the outer insulating layer 004, and the sealing rings 003 are located at the lap joint positions of the joints of each small section of the outer insulating layer 004 and the inner insulating layer 005.
The preparation method of the seawater soaking resistant heat insulation structure comprises the following steps:
s1: preparing a main body heat insulation material into a tubular inner heat insulation layer 005 and a tubular outer heat insulation layer 004 according to the size of a pipeline, and cutting the main body heat insulation material into a multi-section structure, wherein the length of each section is 1.8m, and the main body heat insulation material is a glass fiber felt;
s2: according to the shape of each segment of the tubular heat-insulating layer, the corresponding waterproof cloth cover is made of waterproof cloth, one end of the cloth bag is not sealed, the tubular heat-insulating layer is arranged in the waterproof cloth cover from the unsealed end, then the waterproof cloth cover is sealed, and the sealed position is sealed by using a sealant, wherein the sealant is formed by phenyl silicone rubber and additive TiO2Mixing according to the mass ratio of 15: 1;
s3: installing the small sections of the inner heat-insulating layer sleeved with the waterproof cloth sleeves on the surface of the pipeline section by section, adopting sealant for bonding and sealing joints between the sections to form a complete inner heat-insulating layer 005, then installing small sections of the outer heat-insulating layer on the surface of the installed inner heat-insulating layer 005 section by section, adopting sealant for bonding and sealing between the sections, installing joints between the sections of the outer heat-insulating layer 004 and joints between the sections of the inner heat-insulating layer 005 in a staggered manner, installing sealing rings on the surface of the inner heat-insulating layer 005, and positioning the sealing rings 003 at the lap joint positions of each small section of the outer heat-insulating layer 004 and the inner heat-insulating layer 005;
s4: cutting waterproof glass fiber cloth into strip-shaped waterproof cloth strips 002, adhering sealing strips 001 to two sides of the width of the waterproof cloth strips 002 by using a sealant, wherein the direction of the sealing strips is parallel to the long edges of the waterproof cloth strips 002 to form winding strips, forming spiral winding of mutual edge pressing on the surface of an outer heat-insulating layer 004 by using the winding strips, wherein the edge pressing width is 1/3 of the winding strip width, and the sealing strips 001 and the waterproof cloth strips 002 are mutually pressed tightly;
s5: and after winding is finished, coating a layer of silicone rubber waterproof coating on the outermost layer of the winding belt.
After the heat-insulating layer is used, the sealing performance of the whole structure is ensured, seawater is effectively prevented from entering the heat-insulating layer, the heat-insulating layer and the pipe wall are prevented from being corroded by the seawater, the heat-insulating capacity is improved, the expansion and contraction of each layer of structure can be effectively adjusted and uniformly changed in the process of expansion with heat and contraction with cold of the pipeline, the structural stability of the heat-insulating structure in the long-term use process is ensured, and the service life of the heat-insulating layer is prolonged.
After the heat-insulating layer prepared in the embodiment 1 of the invention is adopted, the heat-insulating property is excellent, and the temperature distribution of the surface of a detected pipeline is uniform and is about 46 ℃.

Claims (9)

1. The utility model provides a resistant sea water soaks insulation construction which characterized in that: the inner heat-insulating layer (005), the outer heat-insulating layer (004), the spiral winding belt and the surface coating are sequentially arranged from inside to outside; the inner heat-insulating layer (005) and the outer heat-insulating layer (004) are both made of glass fiber, asbestos, silicate or aerogel felt and are divided into a plurality of sections, the surface of each section is provided with a layer of sealed waterproof cloth cover, and the waterproof cloth cover is glass fiber cloth coated with a waterproof layer; the axial splicing seam of the inner heat-insulating layer (005) and the outer heat-insulating layer (004) is in a bevel shape with a short inside and a long outside, the position of the seam gradually decreases from inside to outside above the horizontal diameter, the section gradually increases from inside to outside below the horizontal diameter, the bevel angle is within 90 degrees taking the horizontal line as a symmetry axis, the axial installation seam between two adjacent small sections is staggered up and down, and the axial installation seams of the inner heat-insulating layer and the outer heat-insulating layer are staggered up and down; spiral winding area is tailor into banding waterproof cloth (002) with above-mentioned glass fiber cloth, 1 sealing strip (001) has been put respectively on the width both sides of every waterproof cloth (002), the direction is parallel with waterproof cloth (002) length limit, waterproof cloth (002) is in outer heat preservation (004) surface spiral winding and mutual blank pressing, the blank pressing width is 1/3~1/2 of waterproof cloth (002) width, compress tightly each other between sealing strip (001) and waterproof cloth (002) and form spiral winding area.
2. The seawater immersion resistant insulation structure of claim 1, wherein: the sealing strip and the two sides of the waterproof cloth strip are bonded and fixed by adopting a sealant, and the sealant is formed by mixing phenyl silicone rubber and an additive TiO 2 according to a mass ratio of 15: 1.
3. The seawater immersion resistant insulation structure of claim 2, wherein: the length of each small section of the inner heat-insulating layer is more than 150cm, the length of each small section of the outer heat-insulating layer is more than 150cm, and the thickness of the inner heat-insulating layer and the outer heat-insulating layer is 1: 1.
4. A seawater immersion resistant insulation structure as claimed in claim 3, wherein: and a sealing ring (003) is distributed between the inner heat-insulating layer (005) and the outer heat-insulating layer (004), and the sealing ring (003) is positioned at the lap joint position of each section of the outer heat-insulating layer (004) and the inner heat-insulating layer (005).
5. The method for preparing a seawater soaking resistant heat preservation structure as claimed in any one of claims 1 to 4, wherein: according to the pipeline size, cut out insulation material and make tubulose interior heat preservation (005) and outer heat preservation (004), and divide into interior heat preservation (005) and outer heat preservation (004) and be greater than 150mm subsection, sheathe in the waterproof cloth cover of same profile, section-by-section installation heat preservation, at last at outer heat preservation (004) surface mounting spiral winding area, specifically cut out waterproof glass fiber cloth into strip waterproof cloth strip (002), paste sealing strip (001) on waterproof cloth strip (002) width both sides with the sealant, the direction is parallel with waterproof cloth strip (002) long limit, form the winding area, use the spiral winding of winding area formation mutual blank pressing on outer heat preservation (004) surface, blank pressing length is 1/3~1/2 of winding bandwidth, compress tightly each other between sealing strip (001) and waterproof cloth strip (002), form spiral winding area.
6. The method for preparing the seawater soaking resistant heat insulation structure of claim 5, wherein the method comprises the following steps: the waterproof cloth cover is sleeved with the waterproof cloth cover, the tubular heat-insulating layer is cut into a plurality of groups of sections with the length larger than 150cm, the mounting seams are formed in the axial direction of the heat-insulating layer sections, the cloth cover with the same outline is made of glass fiber cloth coated with a waterproof layer according to the outline of each section, one end of the cloth cover is not sealed, the heat-insulating layer sections are loaded into the waterproof cloth cover from the unsealed ends, and then the waterproof cloth cover is sealed.
7. The method for preparing the seawater soaking resistant heat preservation structure of claim 6, wherein the method comprises the following steps: the installation heat preservation is to sheathe above-mentioned interior heat preservation segment of water-proof cloth cover in and installs the pipeline surface section by section, and the seam crossing between section and the section adopts the sealant bonding to seal, forms complete interior heat preservation (005), then installs outer heat preservation segment section by section on the interior heat preservation (005) surface of the completion of installation, adopts the sealant bonding to seal between section and the section, forms complete outer heat preservation (004), and the installation is staggered to the seam between outer heat preservation (004) section and the seam between interior heat preservation (005) section and the section.
8. The method for preparing the seawater soaking resistant heat preservation structure of claim 7, wherein the method comprises the following steps: before outer heat preservation (004), there is sealing washer (003) at interior heat preservation (005) surface mounting, and sealing washer (003) are located the overlap joint position on every subsection seam crossing of outer heat preservation (004) and interior heat preservation (005) surface.
9. A preparation method of a seawater soaking resistant heat insulation structure is characterized by comprising the following steps:
s1: preparing a main body heat-insulating material into a tubular inner heat-insulating layer (005) and a tubular outer heat-insulating layer (004) according to the size of a pipeline, and cutting the main body heat-insulating material into a multi-section structure, wherein the length of each section is more than 150cm, and the main body heat-insulating material is glass fiber, asbestos, silicate or aerogel felt;
s2: according to the appearance of each segment of the tubular heat-insulating layer, a corresponding waterproof cloth sleeve is made of waterproof cloth, one end of a cloth bag is not sealed, the tubular heat-insulating layer is arranged in the waterproof cloth sleeve from the unsealed end, then the waterproof cloth sleeve is sealed, and a sealing agent is used for sealing the sealed position, wherein the sealing agent is formed by mixing phenyl silicone rubber and an additive TiO 2 according to the mass ratio of 15: 1;
s3: installing the inner heat-insulating layer small sections sleeved with the waterproof cloth sleeves on the surface of the pipeline section by section, adopting sealant for bonding and sealing joints between the sections to form a complete inner heat-insulating layer (005), then installing outer heat-insulating layer small sections on the surface of the installed inner heat-insulating layer section by section, adopting sealant for bonding and sealing between the sections to form a complete outer heat-insulating layer (004), staggering and installing the joints between the sections of the outer heat-insulating layer (004) and the joints between the sections of the inner heat-insulating layer (005), installing a sealing ring (003) on the surface of the inner heat-insulating layer (005), and positioning the sealing ring (003) at the lap joint between each section of the outer heat-insulating layer (004) and the surface of the inner heat-insulating layer (005);
s4: cutting waterproof glass fiber cloth into waterproof cloth strips (002), adhering sealing strips (001) to two sides of the width of the waterproof cloth strips (002) by using a sealant, enabling the direction of the sealing strips to be parallel to the long edges of the waterproof cloth strips (002) to form winding strips, forming spiral winding of mutual edge pressing on the surface of an outer heat-insulating layer (004) by using the winding strips, enabling the length of the edge pressing to be 1/3-1/2 of the width of the winding strips, and enabling the sealing strips (001) and the waterproof cloth strips (002) to be mutually pressed to form the spiral winding strips;
s5: and after winding is finished, coating a layer of silicone rubber waterproof coating on the outermost layer of the spiral winding belt.
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