CN117386895B - Environment-friendly prefabricated heat-insulating pipeline based on double-layer hardening protective layers and preparation method thereof - Google Patents
Environment-friendly prefabricated heat-insulating pipeline based on double-layer hardening protective layers and preparation method thereof Download PDFInfo
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- CN117386895B CN117386895B CN202311696114.XA CN202311696114A CN117386895B CN 117386895 B CN117386895 B CN 117386895B CN 202311696114 A CN202311696114 A CN 202311696114A CN 117386895 B CN117386895 B CN 117386895B
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- 239000010959 steel Substances 0.000 claims description 55
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- 229920000742 Cotton Polymers 0.000 claims description 15
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- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 14
- 239000004964 aerogel Substances 0.000 claims description 14
- 239000011810 insulating material Substances 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 13
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- 239000000378 calcium silicate Substances 0.000 claims description 11
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 11
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 11
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
-
- 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
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/08—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing
- F16L3/10—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing divided, i.e. with two or more members engaging the pipe, cable or protective tubing
- F16L3/1091—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing divided, i.e. with two or more members engaging the pipe, cable or protective tubing with two members, the two members being fixed to each other with fastening members on each side
-
- 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
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
-
- 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
-
- 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
-
- 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
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Abstract
The invention discloses an environment-friendly prefabricated heat-insulating pipeline based on a double-layer hardening protection layer and a preparation method thereof, the environment-friendly prefabricated heat-insulating pipeline comprises an inner pipe body, a first reflecting layer, a flexible inner heat-insulating layer, an end hard bearing sleeve ring, a second reflecting layer, a first hardening protection layer, a hardening outer heat-insulating layer and a second hardening protection layer.
Description
Technical Field
The invention belongs to the technical field of heat-insulating pipelines, and particularly relates to an environment-friendly prefabricated heat-insulating pipeline based on a double-layer hardening protective layer and a preparation method thereof.
Background
The heat-insulating pipeline is a short name of heat-insulating pipeline, is used for conveying liquid, gas and other mediums, is suitable for conveying various mediums within the range of-50 ℃ to 450 ℃ in heat-insulating engineering of pipelines such as petroleum, chemical industry, aerospace, hot spring, military, central heating, central air conditioner, municipal administration and the like, and is widely applied to heat-insulating and cold-insulating engineering of industries such as central heating, cooling and hot oil conveying, heating rooms, cold houses, coal mines, petroleum, chemical industry and the like.
When the heat-preserving pipeline is used for conveying a heat flow medium, the heat-preserving and leakage-preventing functions are required to be achieved, and the heat-preserving pipeline is prepared by two preparation methods, namely a traditional heat-preserving pipeline, wherein a soft heat-preserving layer and an iron sheet are adopted for preparation, the soft heat-preserving layer is wrapped by field construction, and a built-in heat-preserving pipe bracket is adopted for supporting; the other is prefabricated heat preservation pipeline in the factory, adopts calcium silicate + polyurethane + spiral duct preparation to adopt external steel construction pipe bracket to support, these two kinds of heat preservation pipelines have following problem:
1. the heat-insulating pipeline wrapped by the soft heat-insulating layer needs to be cut, spliced and bundled on site in a construction site, the site construction quantity is large, the construction quality cannot be guaranteed, the heat-insulating effect of the heat-insulating pipeline cannot be guaranteed, more waste materials are generated in the site construction process, the environmental pollution is large, and the waste material treatment cost is increased;
2. the outer part of the soft heat-insulating layer adopts an iron sheet outer protective layer, the supporting strength is insufficient, the soft heat-insulating material is invalid due to easy fracture and water inflow, the pipeline load is small, the iron sheet outer protective layer is easy to damage in the later period, the soft heat-insulating layer falls down, and the problem of high heat dissipation loss can occur at the installation position of the built-in heat-insulating pipe bracket;
3. the prefabricated heat-insulating pipeline prepared by adopting the calcium silicate, polyurethane and spiral air pipes has the advantages that the joints are more when the calcium silicate heat-insulating layers are spliced, the heat-insulating layer structure is discontinuously sealed, so that the heat loss of the heat-insulating pipeline is serious, and the heat-insulating effect is not ideal;
therefore, we propose an environment-friendly prefabricated heat-insulating pipeline based on a double-layer hardening protective layer and a preparation method thereof.
Disclosure of Invention
The invention aims to provide an environment-friendly prefabricated heat-insulating pipeline based on a double-layer hardening protective layer and a preparation method thereof, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides an environment-friendly prefabricated heat preservation pipeline based on double-deck hardening inoxidizing coating, includes interior body, first reflection stratum, flexible inner heat preservation, tip stereoplasm bearing lantern ring, second reflection stratum, first hardening inoxidizing coating, hardening outer heat preservation and second hardening inoxidizing coating, first reflection stratum sets up the periphery side of interior body, the both ends of interior body all are provided with cup joint first reflection stratum is outside tip stereoplasm bearing lantern ring, flexible inner heat preservation sets up two between the tip stereoplasm bearing lantern ring, the second reflection stratum sets up in the flexibility heat preservation with the outside of tip stereoplasm bearing lantern ring, first hardening inoxidizing coating sets up the outside of second reflection stratum, the setting of hardening outer heat preservation is in the outside of first hardening inoxidizing coating, the setting of second hardening inoxidizing coating is in the outside of hardening outer heat preservation.
Preferably, the outside of flexible interior heat preservation parcel has the wire net, the periphery side of wire net with the periphery side parallel and level of tip stereoplasm bearing lantern ring.
Preferably, the first reflecting layer and the second reflecting layer are single-sided reflecting films or double-sided reflecting sheets prepared by adopting aluminum materials and glass fiber materials.
Preferably, the flexible inner heat-insulating layer is a flexible heat-insulating layer prepared from one or more materials of ceramic cotton, glass cotton, aerogel felt, aluminum silicate needled blanket and glass fiber felt.
Preferably, the end part hard bearing sleeve ring is a two-flap type split bearing sleeve ring prepared from a calcium silicate material or a heat insulation casting material, and a supporting pipe bracket is arranged between the two corresponding end part hard bearing sleeve rings outside the environment-friendly prefabricated heat preservation pipeline.
Preferably, the first hardening protection layer is a composite glass fiber three-dimensional fabric reinforcement body prepared from a three-dimensional fabric and high-temperature-resistant environment-friendly resin, the thickness of the first hardening protection layer is 4-8mm, the second hardening protection layer is a glass fiber reinforced plastic hardening protection layer formed by curing environment-friendly glass fiber reinforced plastic bonding weather-resistant resin, and the thickness of the second hardening protection layer is 3-15mm.
Preferably, the hardened external heat-insulating layer is a glass fiber reinforced polyurethane hardened heat-insulating layer prepared from polyurethane raw materials and glass fibers.
A preparation method of an environment-friendly prefabricated heat-insulating pipeline based on a double-layer hardening protective layer comprises the following steps:
s1, inner pipe fixing and end part hard bearing collar assembling:
placing the inner tube horizontally, clamping the two ends of the inner tube by using a machine tool clamp, driving the inner tube to rotate by using a machine tool through the clamp, uniformly and spirally winding a first reflecting layer prepared in advance on the periphery of the inner tube in the rotating process, folding end hard bearing lantern rings of two split structures at the two ends of the inner tube by using elastic straps, reserving a distance, binding, tightening and fixing by using a stainless steel belt, and removing the elastic straps after the installation of the end hard bearing lantern rings is completed;
s2, winding and leveling the flexible inner heat-insulating layer:
dividing the distance between the two end hard bearing collars between the inner pipe bodies equally according to the width of the flexible inner heat preservation layer, then winding the flexible inner heat preservation layer in equal division areas of the inner pipe bodies in a sectionalized mode, enabling the sectionally-wound flexible inner heat preservation layers to be in close contact with each other, reserving the thickness of a steel wire mesh on the periphery of the flexible inner heat preservation layer and the periphery of the end hard bearing collars after the sectionally-wound flexible inner heat preservation layer on the inner pipe bodies is completed, uniformly winding the whole steel wire mesh outside the flexible inner heat preservation layer, enabling the periphery of the flexible inner heat preservation layer to be flat, and enabling the periphery of the steel wire mesh to be flush with the periphery of the two end hard bearing collars;
s3, winding and wrapping the second reflecting layer:
uniformly winding a second reflecting layer aluminum foil inwards on the outer peripheral sides of the two end part hard bearing lantern rings and the steel wire mesh, reserving a distance from the end heads on the two end part hard bearing lantern rings by the second reflecting layer, and connecting the second reflecting layer and the end part hard bearing lantern rings by adopting high-temperature-resistant adhesive;
s4, spraying and curing the outer heat-insulating layer and the hardening protective layer:
uniformly wrapping a three-dimensional fabric on the outer side of the second reflecting layer, uniformly and reciprocally brushing high-temperature resistant resin on the outer surface layer of the three-dimensional fabric, moving the three-dimensional fabric to a curing furnace, standing at 90-150 ℃, rotationally curing for 3-8 hours to form a first hardening protective layer, moving a semi-finished product to a spraying tugboat, clamping two ends of an inner pipe body by clamps on two sides of the tugboat, uniformly moving the semi-finished product pipe on the tugboat rotating at a uniform speed, uniformly spraying polyurethane raw materials containing glass fibers on the outer side of the first hardening protective layer after curing by a spray gun to cure the polyurethane raw materials to form a hardened outer heat-insulating layer, reciprocally winding glass filaments uniformly wrapped by glass fiber reinforced plastic resin on the outer side of the hardened outer heat-insulating layer for many times, spraying weather resistant resin on the surface of the glass filaments after curing to form a second hardening protective layer, and prefabricating a heat-insulating pipeline;
s5, field installation of the heat-preserving pipeline and heat preservation of the end head:
and transporting the prefabricated heat-preserving pipelines to an installation site, aligning and welding the ends of the two prefabricated heat-preserving pipelines, and then carrying out wrapping heat-preserving treatment at the ends of the two welded prefabricated heat-preserving pipelines.
Preferably, in S3, the specific step of wrapping the second reflective layer is:
s3.1, forward spiral winding of the second reflecting layer:
fixing one end of a second reflecting layer on one of the end hard bearing lantern rings, reserving a distance from the end of the second reflecting layer to the outermost side of the end hard bearing lantern ring, driving the inner pipe body to rotate forwards by a machine tool through a clamp, enabling the second reflecting layer to wind and move forwards along the end hard bearing lantern ring rotating forwards and the outer peripheral side of the steel wire mesh, enabling the second reflecting layer to wind on the end hard bearing lantern ring and the outer peripheral side of the steel wire mesh forwards in a spiral mode, reserving a distance from the end hard bearing lantern ring when the second reflecting layer winds on the other end hard bearing lantern ring, fixing the second reflecting layer and the end hard bearing lantern ring, and completing the forward spiral winding of the second reflecting layer;
s3.2, reversely spirally winding the second reflecting layer:
then the machine tool drives the inner pipe body to reversely rotate through the clamp, at the moment, the second reflecting layer reversely winds and moves along the reverse rotating end part hard bearing sleeve ring and the outer peripheral side of the steel wire mesh, so that the second reflecting layer reversely and spirally winds on the end part hard bearing sleeve ring and the outer peripheral side of the steel wire mesh, when the second reflecting layer winds on the other end part hard bearing sleeve ring and is at a distance from the outermost side of the end part hard bearing sleeve ring, the second reflecting layer is fixed with the end part hard bearing sleeve ring, and at the moment, the end part hard bearing sleeve ring and the outer peripheral side of the steel wire mesh spirally wind two layers of second reflecting layers.
Preferably, in S5, the wrapping heat preservation treatment is performed at the ends of the two welded prefabricated heat preservation pipes, and the specific process is as follows:
s5.1: firstly paving one soft heat-insulating material of ceramic cotton, glass cotton, aluminum silicate needled blanket, aerogel blanket and glass fiber blanket at the ends of two prefabricated heat-insulating pipelines, and pre-paving the heat-insulating material according to 2 XL End head Cutting with the length of +60mm, compressing and wrapping the cut steel strip or steel wire between two prefabricated pipe end hard bearing collars, and binding and fixing the cut steel strip or steel wire;
s5.2: uniformly wrapping the steel wire mesh on the outer side of the soft heat-insulating material to enable the steel wire mesh to be flush with the periphery of the hard bearing sleeve ring at the end part, fixing one end of the second reflecting layer on the exposed section of the hard bearing sleeve ring at one end part, uniformly spirally winding the steel wire mesh from the forward direction to the hard bearing sleeve ring at the other end part for fixing, and reversely uniformly winding a second reflecting layer from the side to the other end;
s5.3: the prepared end glass fiber reinforced plastic is buckled on the outer glass fiber reinforced plastic of the prefabricated heat-insulating pipeline, glass fiber reinforced plastic resin and weather-resistant resin are uniformly coated on the joint, 1 material injection hole with the diameter of 25mm is drilled in the middle of the upper part of the end glass fiber reinforced plastic after the glass fiber reinforced plastic and weather-resistant resin are solidified, polyurethane raw materials are injected into the material injection hole, a plurality of layers of untwisted glass fiber chopped strand mats and untwisted glass cloth which are soaked with environment-friendly resin are adhered at intervals after foaming of the polyurethane raw materials is finished, weather-resistant resin is sprayed on the surface after adhesion, and heat-insulating treatment of the end heads of the two prefabricated heat-insulating pipelines is finished after solidification of the glass fiber reinforced plastic resin and the weather-resistant resin.
Compared with the prior art, the invention has the beneficial effects that:
1. the environment-friendly prefabricated heat-insulating pipeline is prefabricated firstly and then transported to a construction site for installation, the prefabricated heat-insulating pipelines are only required to be butted and welded in site installation, and heat-insulating treatment is carried out on the joints of the two environment-friendly prefabricated heat-insulating pipelines, so that compared with the traditional heat-insulating pipeline in-site heat-insulating material treatment process, the construction period can be greatly shortened, the construction quality is controllable, the production amount of solid waste in the construction site is reduced, the construction site is clean, the solid waste treatment cost is reduced, and the construction period of a construction project is reduced by 30% through the prefabrication technology of the prefabricated environment-friendly prefabricated heat-insulating pipeline;
2. according to the environment-friendly type prefabricated heat-insulating pipeline, the first hardening protection layer and the second hardening protection layer are adopted for hardening protection, so that the protection strength of the environment-friendly type prefabricated heat-insulating pipeline is improved, an external supporting pipe bracket can be arranged at any position outside the environment-friendly type prefabricated heat-insulating pipeline, compared with an internal heat-insulating pipe bracket with poor heat insulation effect, the heat dissipation at the supporting pipe bracket is reduced, the environment-friendly type prefabricated heat-insulating pipeline is prevented from being damaged from the outside, meanwhile, the deformation problem of the environment-friendly type prefabricated heat-insulating pipeline is reduced, the water leakage and water seepage problem of the external protection layer is reduced, the heat-insulating performance of the environment-friendly type prefabricated heat-insulating pipeline is improved, and the service life of the environment-friendly type prefabricated heat-insulating pipeline is prolonged;
3. the flexible inner heat-insulating layer and the hardened outer heat-insulating layer are of an integral continuous structure, the environment-friendly prefabricated heat-insulating pipeline is seamless integrally, the sealing performance is good, the heat loss is reduced, compared with the traditional heat-insulating pipeline with a spliced heat-insulating structure, the environment-friendly prefabricated heat-insulating pipeline can greatly improve the heat-insulating performance, and the service life of heat-insulating materials of the flexible inner heat-insulating layer and the hardened outer heat-insulating layer is ensured;
4. the invention is provided with the first reflecting layer and the second reflecting layer, and the second reflecting layer is two layers of second reflecting layers which are spirally wound in a bidirectional manner, so that radiant heat energy of the environment-friendly prefabricated heat-insulation pipeline can be reflected, the flexible inner heat-insulation layer is subjected to heat insulation by the two layers of the second reflecting layers which are spirally wound in the bidirectional manner, the heat insulation temperature of the flexible inner heat-insulation layer between the first reflecting layer and the second reflecting layer can be maintained, heat energy loss is further reduced, the temperature drop loss of the environment-friendly prefabricated heat-insulation pipeline is reduced, and the heat insulation performance of the environment-friendly prefabricated heat-insulation pipeline is greatly improved.
Drawings
FIG. 1 is a schematic view of a front cross-sectional structure of the present invention;
FIG. 2 is a schematic perspective view of the present invention;
fig. 3 is a schematic side cross-sectional view of the present invention.
In the figure: 1. an inner tube body; 2. a first reflective layer; 3. a flexible inner insulation layer; 4. an end hard bearing collar; 5. a second reflective layer; 6. a first hardened protective layer; 7. hardening the outer insulating layer; 8. a second hardening protective layer; 9. a steel wire mesh; 10. and supporting the pipe bracket.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-3, the environment-friendly prefabricated heat insulation pipeline based on a double-layer hardening protection layer provided by the invention comprises an inner pipe body 1, a first reflecting layer 2, a flexible inner heat insulation layer 3, an end hard bearing collar 4, a second reflecting layer 5, a first hardening protection layer 6, a hardening outer heat insulation layer 7 and a second hardening protection layer 8, wherein the first reflecting layer 2 is arranged on the outer peripheral side of the inner pipe body 1, the end hard bearing collar 4 sleeved outside the first reflecting layer 2 is arranged at two ends of the inner pipe body 1, the flexible inner heat insulation layer 3 is arranged between the two end hard bearing collars 4, the outer peripheral side of the flexible inner heat insulation layer 3 is wrapped with a steel wire mesh 9, the outer peripheral side of the steel wire mesh 9 is flush with the outer peripheral side of the end hard bearing collar 4, the second reflecting layer 5 is arranged on the outer sides of the flexible inner heat insulation layer 3 and the end hard bearing collar 4, the first hardening protection layer 6 is arranged on the outer side of the second reflecting layer 5, the hardening outer heat insulation layer 7 is arranged on the outer side of the first hardening protection layer 6, and the second hardening protection layer 8 is arranged on the outer side of the hardening outer protection layer 7;
the first reflecting layer 2 and the second reflecting layer 5 are single-sided reflecting films or double-sided reflecting sheets prepared from aluminum materials and glass fiber materials, the flexible inner heat insulation layer 3 is a flexible heat insulation layer prepared from one or more materials of ceramic cotton, glass cotton, aerogel felt, aluminum silicate needled blanket and glass fiber felt, the end part hard bearing lantern ring 4 is a two-piece split bearing lantern ring prepared from calcium silicate or heat insulation casting materials, a supporting pipe bracket 10 is arranged between the two corresponding end part hard bearing lantern rings 4 outside the environment-friendly prefabricated heat insulation pipeline, the first hardening protection layer 6 is a composite glass fiber three-dimensional fabric reinforcement prepared from three-dimensional fabrics and high-temperature-resistant environment-friendly resins, the thickness of the first hardening protection layer 6 is 4-8mm, the second hardening protection layer 8 is a glass fiber hardening protection layer cured and molded from environment-friendly glass fiber cement bonding weather-resistant resins, the thickness of the second hardening protection layer 8 is 3-15mm, and the hardening outer heat insulation layer 7 is a glass fiber reinforced hardening polyurethane heat insulation layer prepared from polyurethane raw materials and glass fibers.
The flexible inner heat preservation layer 3 and the hardened outer heat preservation layer 7 are of an integral continuous structure, the environment-friendly prefabricated heat preservation pipeline is seamless integrally, good in sealing performance and capable of reducing heat loss, compared with a traditional heat preservation pipeline with a spliced heat preservation structure, the environment-friendly prefabricated heat preservation pipeline can greatly improve heat preservation performance, and the service life of heat preservation materials of the flexible inner heat preservation layer 3 and the hardened outer heat preservation layer 7 is guaranteed;
the flexible inner heat preservation layer 3 is a flexible heat preservation layer prepared from one or more materials of ceramic cotton, heat preservation cotton, glass cotton, aerogel felt, aluminum silicate needled blanket and glass fiber felt, and specific materials of the flexible inner heat preservation layer 3 are selected according to medium temperature in a prefabricated heat preservation pipeline:
for medium temperature more than 250 ℃, the flexible inner heat-insulating layer 3 selects high-temperature resistant aerogel felt, aluminum silicate needled felt or glass fiber felt, and when the temperature of the outer side surface of the felt or the felt is less than 250 ℃, high-temperature glass wool with poor temperature resistance and better heat-insulating performance is selected;
when the medium temperature is less than 250 ℃, the flexible inner heat preservation layer 3 is made of high-temperature glass wool;
the heat conductivity coefficient of the aerogel felt at normal temperature is 0.019W/(m DEG C), which is one of the materials with the best heat insulation performance at present, the aerogel felt has high price, and the thickness of the heat insulation layer can be thinned by using the material completely, but the construction cost of a pipeline can be greatly increased;
the heat conductivity coefficient of the glass wool is 0.041 and W/(m DEG C), the heat insulation capacity is inferior to that of the aerogel blanket and the economy is high, but the long-term working temperature of the glass wool is less than 250 ℃, and the glass wool is matched with other heat insulation materials for use in a high-temperature steam pipeline;
the heat conductivity coefficient of the aluminum silicate needled blanket is 0.044W/(m DEG C), and the heat conductivity coefficient is secondly compared with that of the aerogel blanket and the glass wool, but the heat resistance of the aluminum silicate needled blanket can exceed 800 ℃ and the economical efficiency is better than that of the aerogel blanket, and the aluminum silicate needled blanket is matched with the glass wool in a high-temperature pipeline, so that the heat insulation performance and the economical efficiency of the prefabricated heat insulation pipeline can be considered;
the heat conductivity coefficient of polyurethane at normal temperature is 0.019W/(m DEG C), the heat conductivity coefficient is small, but the long-term working temperature of the polyurethane is less than 120 ℃, the polyurethane can only be used on the outer sides of other heat insulation materials, meanwhile, the polyurethane is of an organic closed-pore structure and waterproof, so that water vapor can be effectively prevented from entering the heat insulation layer of the flexible inner layer, and the service life of the heat insulation structure is prolonged;
polyurethane and glass steel layer separate setting: the composite glass fiber three-dimensional fabric reinforcement-polyurethane-glass fiber reinforced plastic structure effectively reduces the stress to which polyurethane materials are subjected through the double-layer hardening protective layers, ensures that the polyurethane is not deformed and broken, fully exerts the excellent heat insulation performance of the polyurethane, simultaneously, the two-layer hardening protective layers are both made of environment-friendly resin and fiber materials, the density is lower than that of common steel external protective materials, the load of pipelines is reduced, and the operation safety of prefabricated heat-insulation pipelines is further improved;
inner hardened layer-composite glass fiber three-dimensional fabric reinforcement: the force received locally can be dispersed to the periphery through the three-dimensional fabric, so that the bending resistance of the hardening protective layer is improved;
taking a working pipe with a steam temperature of 250 ℃ and a specification of DN900 as an example:
traditional soft heat preservation material structure: 50mm aluminum silicate needled blanket/high temperature resistant reflecting layer+250 mm (5 layers of 50 mm) high temperature glass wool/4 layers of medium temperature resistant reflecting layer+50 mm high temperature glass wool (180 DEG top layer is covered)/common reflecting layer+0.7 mm outer protecting layer (color steel plate);
calcium silicate splicing structure: 50mm aluminum silicate needled blanket/high temperature resistant reflecting layer +250mm (5 layers of 50 mm) calcium silicate/4 layers of medium temperature resistant reflecting layer +75mm polyurethane foam +0.7mm outer protective layer (spiral duct);
the invention relates to a prefabricated heat preservation structure: 50mm aluminum silicate needled blanket/high temperature resistant reflecting layer +200mm (5 layers of 50 mm) calcium silicate/4 layers of medium temperature resistant reflecting layer +60mm polyurethane foam +0.7mm outer protective layer (spiral duct);
as shown in the following table 1, the thermal insulation performance of the conventional soft thermal insulation material structure, the calcium silicate splicing structure and the prefabricated thermal insulation structure of the present invention are compared, and table 1:
as shown in the table 1, compared with the traditional soft heat-insulating material structure and the calcium silicate spliced heat-insulating structure, the prefabricated heat-insulating structure is thinned by 40-65mm, and the heat-insulating performance of the pipeline is improved by 10%;
taking a working tube with the steam temperature of 250 ℃ and the specification of DN900 as an example, as shown in table 2, the thickness data of the flexible inner heat insulation layer are shown in table 2 based on the same heat loss per kilometer as the thickness of the hard heat insulation layer:
as shown in Table 2, for the smaller installation space of the prefabricated heat-insulating pipeline, the combination of aerogel and glass wool is preferentially considered, so that the thickness of the prefabricated heat-insulating pipeline is reduced, and the prefabricated heat-insulating pipeline is convenient to install and use in a small space;
taking a working tube with the steam temperature of 250 ℃ and the specification of DN900 as an example, as shown in table 3, the heat loss per kilometer and the thickness data of the flexible inner heat insulation layer are shown in table 3:
as shown in table 3 above, when the heat loss or medium temperature requirements are high, the flexible inner insulation layer prioritizes the combination of the gel felt and the glass wool;
the invention is provided with the first reflecting layer 2 and the second reflecting layer 5, and the second reflecting layer 5 is two layers of second reflecting layers 5 which are spirally wound in a bidirectional manner, so that radiant heat energy of the environment-friendly prefabricated heat-insulating pipeline can be reflected, the flexible inner heat-insulating layer 3 is subjected to heat insulation by the second reflecting layer 5 which is wound in a bidirectional manner in a double-layer manner, the heat-insulating temperature of the flexible inner heat-insulating layer 3 between the first reflecting layer 2 and the second reflecting layer 5 can be maintained, heat energy loss is further reduced, the temperature drop loss of the environment-friendly prefabricated heat-insulating pipeline is reduced, and the heat-insulating performance of the environment-friendly prefabricated heat-insulating pipeline is greatly improved;
the invention provides a preparation method of an environment-friendly prefabricated heat-insulating pipeline based on a double-layer hardening protective layer, which comprises the following steps:
s1, inner pipe fixing and end part hard bearing collar assembling:
the method comprises the steps of horizontally placing an inner pipe body 1, clamping two ends of the inner pipe body 1 by using a machine tool clamp, driving the inner pipe body 1 to rotate by using a machine tool through the clamp, uniformly and spirally winding a first reflection layer 2 prepared in advance on the periphery of the inner pipe body 1 in the rotating process, folding end hard bearing lantern rings 4 of a two-piece split structure at two ends of the inner pipe body 1 by using elastic bandages, reserving a distance, bundling, tightening and fixing by using stainless steel belts, and removing the elastic bandages after the end hard bearing lantern rings 4 are installed;
s2, winding and leveling the flexible inner heat-insulating layer:
dividing the distance between the two end part hard bearing lantern rings 4 and the inner pipe body 1 equally according to the width of the flexible inner heat preservation layer 3, then winding the flexible inner heat preservation layer 3 in the equally divided area of the inner pipe body 1 in a sectionalized mode, enabling the winding thickness of the sectionally wound flexible inner heat preservation layer 3 to be equal, enabling the sectionally wound flexible inner heat preservation layer 3 to be in close contact, reserving the thickness of a steel wire mesh 9 on the periphery of the flexible inner heat preservation layer 3 and the periphery of the end part hard bearing lantern rings 4 after the sectionally winding of the flexible inner heat preservation layer 3 is completed, uniformly winding the whole steel wire mesh 9 outside the flexible inner heat preservation layer 3, enabling the peripheral surface of the flexible inner heat preservation layer 3 to be flat, and enabling the peripheral surface of the steel wire mesh 9 to be level with the peripheral surfaces of the two end part hard bearing lantern rings 4;
s3, winding and wrapping the second reflecting layer:
uniformly winding aluminum foils of the second reflecting layer 5 inwards on the outer peripheral sides of the two end part hard bearing lantern rings 4 and the steel wire mesh 9, reserving a distance from the end heads on the two end part hard bearing lantern rings 4 by the second reflecting layer 5, and connecting the connecting parts of the second reflecting layer 5 and the end part hard bearing lantern rings 4 by adopting high-temperature-resistant adhesive;
in S3, the specific steps of wrapping the second reflective layer around the package include:
s3.1, forward spiral winding of the second reflecting layer:
fixing one end of a second reflecting layer 5 on one of the end hard bearing rings 4, reserving a distance from the end of the second reflecting layer 5 to the outermost side of the end hard bearing ring 4, driving the inner pipe body 1 to rotate forwards by a machine tool through a clamp, enabling the second reflecting layer 5 to wind and move forwards along the outer peripheral sides of the end hard bearing ring 4 and the steel wire mesh 9 which rotate forwards, enabling the second reflecting layer 5 to wind on the outer peripheral sides of the end hard bearing ring 4 and the steel wire mesh 9 forwards in a spiral mode, reserving a distance from the outermost side of the end hard bearing ring 4 when the second reflecting layer 5 winds on the other end hard bearing ring 4, fixing the second reflecting layer 5 and the end hard bearing ring 4, and completing the forward spiral winding of the second reflecting layer 5;
s3.2, reversely spirally winding the second reflecting layer:
then the machine tool drives the inner pipe body 1 to reversely rotate through the clamp, at the moment, the second reflecting layer 5 reversely winds and moves along the reverse rotating end part hard bearing sleeve ring 4 and the outer peripheral side of the steel wire mesh 9, so that the second reflecting layer 5 reversely winds on the end part hard bearing sleeve ring 4 and the outer peripheral side of the steel wire mesh 9, when the second reflecting layer 5 winds on the other end part hard bearing sleeve ring 4 and a certain distance is reserved at the outermost side of the end part hard bearing sleeve ring 4, then the second reflecting layer 5 is fixed with the end part hard bearing sleeve ring 4, at the moment, the end part hard bearing sleeve ring 4 and the outer peripheral side of the steel wire mesh 9 spirally wind two layers of second reflecting layers 5;
s4, spraying and curing the outer heat-insulating layer and the hardening protective layer:
uniformly wrapping a three-dimensional fabric on the outer side of the second reflecting layer 5, uniformly and reciprocally brushing high-temperature resistant resin on the outer surface layer of the three-dimensional fabric, moving the three-dimensional fabric to a curing furnace, standing at 90-150 ℃, rotationally curing for 3-8 hours to form a first hardening protection layer 6, moving a semi-finished product to a spraying tugboat, clamping two sides of the tugboat to clamp two ends of the inner pipe body 1, uniformly spraying polyurethane raw materials containing glass fibers on the outer side of the first hardening protection layer 6 after curing through a spray gun to enable the polyurethane raw materials to be cured to form a hardening outer heat-insulating layer 7, reciprocally winding glass filaments uniformly wrapped with glass fiber reinforced plastic resin on the outer side of the hardening outer heat-insulating layer 7 for a plurality of times, spraying weather resistant resin on the surface of the glass filaments after curing to form a second hardening protection layer 8, and prefabricating the heat-insulating pipeline;
s5, field installation of the heat-preserving pipeline and heat preservation of the end head:
transporting the prefabricated heat-preserving pipelines to an installation site, aligning and welding the ends of the two prefabricated heat-preserving pipelines, and then carrying out wrapping heat-preserving treatment on the ends of the two welded prefabricated heat-preserving pipelines;
in S5, wrapping heat preservation treatment is carried out at the ends of two welded prefabricated heat preservation pipelines, and the specific process is as follows:
s5.1: firstly paving one soft heat-insulating material of ceramic cotton, glass cotton, aluminum silicate needled blanket, aerogel blanket and glass fiber blanket at the ends of two prefabricated heat-insulating pipelines, and pre-paving the heat-insulating material according to 2 XL End head Cutting with the length of +60mm, compressing and wrapping the cut steel strip or steel wire between two prefabricated pipe end hard bearing lantern rings 4, and binding and fixing the cut steel strip or steel wire;
s5.2: uniformly wrapping the steel wire mesh 9 on the outer side of the soft heat-insulating material to enable the steel wire mesh to be flush with the periphery of the end part hard bearing sleeve ring 4, fixing one end of the second reflecting layer 5 on the exposed section of the end part hard bearing sleeve ring 4 at one side, uniformly spirally winding the steel wire mesh from the forward direction to the end part hard bearing sleeve ring 4 at the other side for fixing, and reversely uniformly winding a layer of second reflecting layer 5 from the side to the other side;
s5.3: the prepared glass fiber reinforced plastic at the end is buckled on the outer glass fiber reinforced plastic of the prefabricated heat-insulating pipeline, glass fiber reinforced plastic resin and weather-proof resin are uniformly coated at the joint, 1 material injection hole with the diameter of 25mm is drilled in the middle of the upper part of the glass fiber reinforced plastic at the end after the glass fiber reinforced plastic and the weather-proof resin are solidified, polyurethane raw materials are injected into the material injection hole, a plurality of layers of untwisted glass fiber chopped strand mats and untwisted glass cloth which are soaked with environment-friendly resin are adhered at intervals after foaming of the polyurethane raw materials is finished, the weather-proof resin is sprayed on the surface after the adhesion, and heat-insulating treatment of the two prefabricated heat-insulating pipeline ends is finished after the glass fiber reinforced plastic and the weather-proof resin are solidified.
The environment-friendly prefabricated heat-insulating pipeline is prefabricated firstly and then transported to a construction site for installation, the prefabricated heat-insulating pipelines are only required to be butted and welded in site installation, and heat-insulating treatment is carried out on the joints of the two environment-friendly prefabricated heat-insulating pipelines, so that compared with the traditional heat-insulating pipeline in-site heat-insulating material treatment process, the construction period can be greatly shortened, the construction quality is controllable, the production amount of solid waste in the construction site is reduced, the construction site is clean, the solid waste treatment cost is reduced, and the construction period of a construction project is reduced by 30% through the prefabrication technology of the prefabricated environment-friendly prefabricated heat-insulating pipeline;
the traditional heat preservation pipeline can be installed for 3m each person every day 3 According to 20 ginseng and construction:
the pipe diameter DN300, the traditional heat preservation thickness is 175mm, the whole pipe network length is 3km, the traditional heat preservation pipeline is all required to be constructed on site, the construction period is about 80 days, materials are arranged nearby during construction, material management confusion is easy to cause, protective measures are poor, and the appearance and performance of the materials are often damaged; the prefabricated heat-insulating pipeline is mainly prefabricated in a factory, only needs to perform heat-insulating construction on the end part on site, has high machining mechanization degree of the prefabricated pipe in the factory, can be completed in 21 days, and needs 29 days for heat-insulating treatment on the end part on site, and the total construction period is 50 days;
the pipe diameter DN900, the traditional heat preservation thickness is 345mm, and the construction on site of a single kilometer takes 42 days; the processing in the prefabricated heat-preserving pipeline factory needs 14 days, the site joint coating construction is carried out for about 15 days, and the total construction period is only 29 days.
According to the environment-friendly type prefabricated heat-insulating pipeline, the first hardening protection layer 6 and the second hardening protection layer 8 are adopted for two-layer hardening protection, so that the protection strength of the environment-friendly type prefabricated heat-insulating pipeline is improved, an external supporting pipe support can be arranged at any position outside the environment-friendly type prefabricated heat-insulating pipeline, compared with an internal heat-insulating pipe support with poor heat insulation effect, the heat dissipation at the supporting pipe support is reduced, the environment-friendly type prefabricated heat-insulating pipeline is prevented from being damaged from the outside, meanwhile, the deformation problem of the environment-friendly type prefabricated heat-insulating pipeline is reduced, the water leakage and water seepage problem of the external protection layer is reduced, the heat-insulating performance of the environment-friendly type prefabricated heat-insulating pipeline is improved, and the service life of the environment-friendly type prefabricated heat-insulating pipeline is prolonged.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The environment-friendly prefabricated heat-insulating pipeline based on the double-layer hardening protection layer is characterized by comprising an inner pipe body (1), a first reflecting layer (2), a flexible inner heat-insulating layer (3), an end part hard bearing sleeve ring (4), a second reflecting layer (5), a first hardening protection layer (6), a hardening outer heat-insulating layer (7) and a second hardening protection layer (8), wherein the first reflecting layer (2) is arranged on the outer peripheral side of the inner pipe body (1), the two ends of the inner pipe body (1) are respectively provided with the end part hard bearing sleeve rings (4) sleeved outside the first reflecting layer (2), the flexible inner heat-insulating layer (3) is arranged between the two end part hard bearing sleeve rings (4), the second reflecting layer (5) is arranged on the outer sides of the flexible inner heat-insulating layer (3) and the end part hard bearing sleeve ring (4), the first hardening protection layer (6) is arranged on the outer sides of the second reflecting layer (5), the hardening outer heat-insulating layer (7) is arranged on the outer sides of the first hardening protection layer (6), and the second hardening protection layer (8) is arranged on the outer sides of the hardening protection layer (7).
The outer side of the flexible inner heat insulation layer (3) is wrapped with a steel wire mesh (9), and the outer peripheral side of the steel wire mesh (9) is flush with the outer peripheral side of the end part hard bearing collar (4);
the end part hard bearing lantern ring (4) is a two-flap type split bearing lantern ring prepared from calcium silicate or heat insulation castable, and a supporting pipe bracket (10) is arranged between the two end part hard bearing lantern rings (4) corresponding to the outside of the environment-friendly prefabricated heat preservation pipeline;
the preparation method of the environment-friendly prefabricated heat-insulating pipeline based on the double-layer hardening protection layer comprises the following steps:
s1, inner pipe fixing and end part hard bearing collar assembling:
the method comprises the steps of horizontally placing an inner pipe body (1), clamping two ends of the inner pipe body (1) by using a machine tool clamp, driving the inner pipe body (1) to rotate by using a machine tool through the clamp, uniformly and spirally winding a first reflection layer (2) prepared in advance on the periphery of the inner pipe body (1) in the rotating process, folding end hard bearing lantern rings (4) of a two-piece split structure at two ends of the inner pipe body (1) through elastic bandages, reserving a certain distance, bundling, tightening and fixing by using a stainless steel belt, and removing the elastic bandages after the end hard bearing lantern rings (4) are installed;
s2, winding and leveling the flexible inner heat-insulating layer:
dividing the distance between the two end hard bearing collars (4) between the inner pipe bodies (1) equally according to the width of the flexible inner heat preservation layer (3), then winding the flexible inner heat preservation layer (3) in equal division areas of the inner pipe bodies (1) in a sectionalized mode, enabling the winding thickness of the sectionally wound flexible inner heat preservation layer (3) to be equal, enabling the sectionally wound flexible inner heat preservation layer (3) to be in close contact, reserving the thickness of a steel wire mesh (9) on the periphery of the flexible inner heat preservation layer (3) and the periphery of the end hard bearing collars (4) after the sectionally wound flexible inner heat preservation layer (3) on the inner pipe bodies (1) is completed, uniformly winding the whole steel wire mesh (9) outside the flexible inner heat preservation layer (3), enabling the outer peripheral surface of the flexible inner heat preservation layer (3) to be flat, and enabling the outer peripheral surfaces of the steel wire mesh (9) to be flush with the outer peripheral surfaces of the two end hard bearing collars (4) at the moment;
s3, winding and wrapping the second reflecting layer:
uniformly winding aluminum foils of the second reflecting layer (5) inwards on the outer peripheral sides of the two end part hard bearing lantern rings (4) and the steel wire mesh (9), reserving a distance from the end heads on the two end part hard bearing lantern rings (4) by the second reflecting layer (5), and connecting the connecting parts of the second reflecting layer (5) and the end part hard bearing lantern rings (4) by adopting high-temperature-resistant adhesive;
s4, spraying and curing the outer heat-insulating layer and the hardening protective layer:
uniformly wrapping a three-dimensional fabric on the outer side of a second reflecting layer (5), uniformly and reciprocally brushing high-temperature resistant resin on the outer surface layer of the three-dimensional fabric, moving the three-dimensional fabric to a curing furnace, standing at 90-150 ℃ for 3-8 hours, rotationally curing to form a first hardening protective layer (6), moving a semi-finished product to a spraying tugboat, clamping two sides of the tugboat to clamp two ends of an inner pipe body (1), uniformly spraying polyurethane raw materials containing glass fibers on the outer side of the cured first hardening protective layer (6) through a spray gun to cure the polyurethane raw materials to form a hardened outer heat-insulating layer (7), reciprocally winding glass filaments uniformly wrapped with the glass fiber reinforced plastic resin on the outer side of the cured hardened outer heat-insulating layer (7) for a plurality of times, spraying weather-resistant resin on the surface of the hardened outer heat-insulating layer to form a second hardening protective layer (8), and prefabricating a heat-insulating pipeline;
s5, field installation of the heat-preserving pipeline and heat preservation of the end head:
and transporting the prefabricated heat-preserving pipelines to an installation site, aligning and welding the ends of the two prefabricated heat-preserving pipelines, and then carrying out wrapping heat-preserving treatment at the ends of the two welded prefabricated heat-preserving pipelines.
2. The environment-friendly prefabricated heat-insulating pipeline based on the double-layer hardening protection layer as claimed in claim 1, wherein the environment-friendly prefabricated heat-insulating pipeline is characterized in that: the first reflecting layer (2) and the second reflecting layer (5) are single-sided reflecting films or double-sided reflecting sheets prepared by adopting aluminum materials and glass fiber materials.
3. The environment-friendly prefabricated heat-insulating pipeline based on the double-layer hardening protection layer as claimed in claim 1, wherein the environment-friendly prefabricated heat-insulating pipeline is characterized in that: the flexible inner heat-insulating layer (3) is made of one or more materials of ceramic cotton, glass cotton, aerogel felt, aluminum silicate needled blanket and glass fiber felt.
4. The environment-friendly prefabricated heat-insulating pipeline based on the double-layer hardening protection layer as claimed in claim 1, wherein the environment-friendly prefabricated heat-insulating pipeline is characterized in that: the first hardening protection layer (6) is a composite glass fiber three-dimensional fabric reinforcement body prepared by adopting a three-dimensional fabric and high-temperature-resistant environment-friendly resin, the thickness of the first hardening protection layer (6) is 4-8mm, the second hardening protection layer (8) is a glass fiber reinforced plastic hardening protection layer formed by adopting an environment-friendly glass fiber reinforced plastic adhesive bonding weather-resistant resin in a curing mode, and the thickness of the second hardening protection layer (8) is 3-15mm.
5. The environment-friendly prefabricated heat-insulating pipeline based on the double-layer hardening protection layer as claimed in claim 1, wherein the environment-friendly prefabricated heat-insulating pipeline is characterized in that: the hardened outer heat-insulating layer (7) is a glass fiber reinforced polyurethane hardened heat-insulating layer prepared from polyurethane raw materials and glass fibers.
6. The environment-friendly prefabricated heat-insulating pipeline based on the double-layer hardening protection layer as claimed in claim 1, wherein the environment-friendly prefabricated heat-insulating pipeline is characterized in that: in S3, the specific steps of wrapping the second reflective layer around the package include:
s3.1, forward spiral winding of the second reflecting layer:
fixing one end of a second reflecting layer (5) on one of the end hard bearing rings (4), reserving a distance from the end of the second reflecting layer (5) to the outermost side of the end hard bearing ring (4), driving the inner pipe body (1) to rotate forwards by a machine tool through a clamp, enabling the second reflecting layer (5) to wind and move forwards along the outer peripheral sides of the end hard bearing ring (4) and the steel wire mesh (9) which rotate forwards, enabling the second reflecting layer (5) to wind forwards and spirally on the outer peripheral sides of the end hard bearing ring (4) and the steel wire mesh (9), reserving a distance from the outermost side of the end hard bearing ring (4) when the second reflecting layer (5) winds onto the other end hard bearing ring (4), and then fixing the second reflecting layer (5) and the end hard bearing ring (4), and completing forward spiral winding of the second reflecting layer (5);
s3.2, reversely spirally winding the second reflecting layer:
then the machine tool drives the inner pipe body (1) to reversely rotate through the clamp, at the moment, the second reflecting layer (5) reversely winds and moves along the peripheral sides of the end part hard bearing sleeve ring (4) and the steel wire mesh (9) which reversely rotate, so that the second reflecting layer (5) reversely and spirally winds on the peripheral sides of the end part hard bearing sleeve ring (4) and the steel wire mesh (9), when the second reflecting layer (5) winds on the other end part hard bearing sleeve ring (4) and is far away from the outermost side of the end part hard bearing sleeve ring (4), a certain distance is reserved, then the second reflecting layer (5) is fixed with the end part hard bearing sleeve ring (4), and at the moment, the peripheral sides of the end part hard bearing sleeve ring (4) and the steel wire mesh (9) spirally wind two layers of second reflecting layers (5).
7. The environment-friendly prefabricated heat-insulating pipeline based on the double-layer hardening protection layer as claimed in claim 1, wherein the environment-friendly prefabricated heat-insulating pipeline is characterized in that: in S5, wrapping heat preservation treatment is carried out at the ends of two welded prefabricated heat preservation pipelines, and the specific process is as follows:
s5.1: firstly paving one soft heat-insulating material of ceramic cotton, glass cotton, aluminum silicate needled blanket, aerogel blanket and glass fiber blanket at the ends of two prefabricated heat-insulating pipelines, and pre-paving the heat-insulating material according to 2 XL End head Cutting with the length of +60mm, compressing and wrapping the cut steel strip or steel wire between two rigid bearing collars (4) at the end parts of the prefabricated heat-insulating pipelines;
s5.2: uniformly wrapping the steel wire mesh (9) on the outer side of the soft heat-insulating material to enable the steel wire mesh to be flush with the periphery of the end part hard bearing sleeve ring (4), fixing one end of the second reflecting layer (5) on the exposed section of the end part hard bearing sleeve ring (4) on one side, uniformly spirally winding the steel wire mesh on the end part hard bearing sleeve ring (4) on the other side from the forward direction, and uniformly winding a layer of second reflecting layer (5) on the other side from the side in the reverse direction;
s5.3: the prepared glass fiber reinforced plastic at the end is buckled on the outer glass fiber reinforced plastic of the prefabricated heat-insulating pipeline, glass fiber reinforced plastic resin and weather-proof resin are uniformly coated at the joint, 1 material injection hole with the diameter of 25mm is drilled in the middle of the upper part of the glass fiber reinforced plastic at the end after the glass fiber reinforced plastic and the weather-proof resin are solidified, polyurethane raw materials are injected into the material injection hole, a plurality of layers of untwisted glass fiber chopped strand mats and untwisted glass cloth which are soaked with environment-friendly resin are adhered at intervals after foaming of the polyurethane raw materials is finished, the weather-proof resin is sprayed on the surface after the adhesion, and heat-insulating treatment of the two prefabricated heat-insulating pipeline ends is finished after the glass fiber reinforced plastic and the weather-proof resin are solidified.
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| EP0067919A1 (en) * | 1981-06-01 | 1982-12-29 | Pabreco S.A. | Plastics pipe strengthened by means of a reinforcement |
| US7559343B1 (en) * | 1998-07-23 | 2009-07-14 | Kaefer Integrated Services Pty Ltd | Insulation module for vessels |
| CN102278543A (en) * | 2011-07-04 | 2011-12-14 | 河北宏广橡塑金属制品有限公司 | Compressed natural gas pipe and manufacture method thereof |
| CN102644804A (en) * | 2012-04-12 | 2012-08-22 | 天津天地龙管业有限公司 | Novel pipeline system |
| CN103498974A (en) * | 2013-09-30 | 2014-01-08 | 中国船舶重工集团公司第七二五研究所 | Light composite material exhaust pipe and method for manufacturing same |
-
2023
- 2023-12-12 CN CN202311696114.XA patent/CN117386895B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0067919A1 (en) * | 1981-06-01 | 1982-12-29 | Pabreco S.A. | Plastics pipe strengthened by means of a reinforcement |
| US7559343B1 (en) * | 1998-07-23 | 2009-07-14 | Kaefer Integrated Services Pty Ltd | Insulation module for vessels |
| CN102278543A (en) * | 2011-07-04 | 2011-12-14 | 河北宏广橡塑金属制品有限公司 | Compressed natural gas pipe and manufacture method thereof |
| CN102644804A (en) * | 2012-04-12 | 2012-08-22 | 天津天地龙管业有限公司 | Novel pipeline system |
| CN103498974A (en) * | 2013-09-30 | 2014-01-08 | 中国船舶重工集团公司第七二五研究所 | Light composite material exhaust pipe and method for manufacturing same |
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| CN117386895A (en) | 2024-01-12 |
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