CN110594532A - Composite heat-insulation prefabricated overhead steam heat-insulation pipe and processing technology thereof - Google Patents
Composite heat-insulation prefabricated overhead steam heat-insulation pipe and processing technology thereof Download PDFInfo
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- CN110594532A CN110594532A CN201910928818.2A CN201910928818A CN110594532A CN 110594532 A CN110594532 A CN 110594532A CN 201910928818 A CN201910928818 A CN 201910928818A CN 110594532 A CN110594532 A CN 110594532A
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- 238000009413 insulation Methods 0.000 title claims abstract description 41
- 239000002131 composite material Substances 0.000 title claims abstract description 26
- 238000005516 engineering process Methods 0.000 title claims description 11
- 239000011491 glass wool Substances 0.000 claims abstract description 67
- 239000006260 foam Substances 0.000 claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 238000005187 foaming Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 229920001903 high density polyethylene Polymers 0.000 claims description 4
- 239000004700 high-density polyethylene Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 2
- 239000003063 flame retardant Substances 0.000 claims description 2
- 229920000742 Cotton Polymers 0.000 abstract description 13
- 239000011521 glass Substances 0.000 abstract description 6
- 238000004321 preservation Methods 0.000 description 13
- 229920005830 Polyurethane Foam Polymers 0.000 description 11
- 239000011496 polyurethane foam Substances 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 6
- 229910052918 calcium silicate Inorganic materials 0.000 description 6
- 239000000378 calcium silicate Substances 0.000 description 6
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000012774 insulation material Substances 0.000 description 5
- 210000002268 wool Anatomy 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 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 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
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- 238000005096 rolling process Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- F16L59/028—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
- F16L59/00—Thermal insulation in general
- F16L59/04—Arrangements using dry fillers, e.g. using slag wool which is added to the object to be insulated by pouring, spreading, spraying or the like
-
- 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
- F16L59/12—Arrangements for supporting insulation from the wall or body insulated, e.g. by means of spacers between pipe and heat-insulating material; Arrangements specially adapted for supporting insulated bodies
Abstract
The invention discloses a composite heat-insulation prefabricated overhead steam heat-insulation pipe, which relates to the field of thermal pipelines and comprises a steam pipe, wherein a shell is sleeved on the steam pipe, and a glass wool layer, a supporting layer and a foam layer are arranged between the steam pipe and the shell; the cotton layer parcel of glass sets up in steam pipe week side, and the supporting layer sets up between foam layer and the cotton layer of glass, and the foam layer is filled and is set up between supporting layer and shell. Aiming at the problem of high manufacturing cost in the prior art, the invention reduces the occupation ratio of the foam layer by increasing the occupation ratio of the glass wool in the heat-insulating pipe, thereby reducing the production cost of the heat-insulating pipe and facilitating popularization and application; in addition, because the glass wool layer has stronger high-temperature resistance than the foam layer, the glass wool layer is arranged on the periphery close to the steam pipe, and the use safety of the heat-insulating pipe can be effectively improved.
Description
Technical Field
The invention relates to the field of heating pipelines, in particular to a composite heat-insulation prefabricated overhead steam heat-insulation pipe and a processing technology thereof.
Background
An industrial steam transmission and distribution pipe network (hereinafter referred to as a heat supply network) plays an important role in energy conservation and emission reduction as a component of cogeneration. The heat supply network for transporting and distributing steam has two laying modes of overhead and direct burial. About nine of them adopt aerial laying. Overhead heat supply networks are subject to the natural external influences of wind, rain and sunlight. Human activities such as vehicle scraping collisions, personnel stepping on, etc. also affect the heat grid. The above-mentioned various external actions often cause the heat-insulating shell of the heat supply network pipeline to deform, crack and fall off. Furthermore, wind and rain enter the heat-insulating layer of the pipeline, so that the heat-insulating material is deformed and deteriorated to cause loss. For an industrial steam conveying heat supply network, the conveying heat efficiency is not lower than 92 percent (specified by national standard), and the on-line heat supply network can hardly reach the standard. Some heat supply networks with low construction quality and management and maintenance loss can even have low efficiency of about 70 percent.
After the factory prefabricated tile (microporous calcium silicate tile) -foam (hard polyurethane foam) composite heat-insulating overhead laid steam heat-insulating pipe is disclosed, the conditions of serious additional heat loss and low heat efficiency of on-site heat-insulating built overhead steam pipe network are thoroughly changed. The market is fierce and praised.
However, rigid polyurethane foam and micro-cellular calcium silicate tiles are relatively expensive among conventional insulation materials. Compared with the traditional heat supply network engineering, the heat supply network construction cost is greatly increased by a factory prefabrication heat insulation mode. The popularization speed of the prefabricated overhead heat-insulation steam pipe is influenced to a certain extent.
Disclosure of Invention
Aiming at the problem of high manufacturing cost in the prior art, the invention aims to provide a composite heat-insulation prefabricated overhead steam heat-insulation pipe which has the advantages of excellent heat-insulation performance, low manufacturing cost and convenience in popularization and use.
In order to achieve the purpose, the invention provides the following technical scheme:
a composite heat-insulation prefabricated overhead steam heat-insulation pipe comprises a steam pipe, wherein a shell is sleeved on the steam pipe, and a glass wool layer, a supporting layer and a foam layer are arranged between the steam pipe and the shell;
the cotton layer parcel of glass set up in steam pipe week side, the supporting layer set up in the foam layer with between the cotton layer of glass, the foam layer fill set up in the supporting layer with between the shell.
By adopting the technical scheme, the ratio of the glass wool in the heat-insulating pipe is increased, so that the ratio of the foam layer is reduced, the production cost of the heat-insulating pipe is reduced, and the heat-insulating pipe is convenient to popularize, popularize and use; because the glass wool layer has stronger high-temperature resistance than the foam layer, the glass wool layer is arranged on the periphery close to the steam pipe, so that the use safety of the heat-insulating pipe can be effectively improved; according to the invention, the supporting layer is arranged between the foam layer and the glass wool layer, so that the structural strength is enhanced, the foam layer is assisted to bear disturbance such as external pressure, collision and the like, the shell of the heat-insulating pipe is prevented from being extruded, and then the heat-insulating wool is extruded, so that the heat-insulating performance of the heat-insulating wool layer is reduced or even loses efficacy, and the supporting layer is also used for bearing the pressure during foaming, so that the glass wool is adopted at the peripheral part of the steam pipe, and the processing and the production are convenient.
Furthermore, a support is arranged between the support layer and the steam pipe and at the end part of the glass wool layer.
Through the technical scheme, the support bracket is used for bearing the weight of the steam pipe, so that the steam pipe is prevented from being extruded, the heat insulation pipe shell is prevented from being extruded, and then the heat insulation cotton is extruded, so that the heat insulation performance of the heat insulation cotton layer is reduced and even the heat insulation cotton layer is ineffective.
Furthermore, the supporting layer and the support are formed by splicing and fixing a plurality of tile arches.
By the technical scheme, the tile arch is in a customized size, so that a product with a size meeting the requirement can be conveniently processed; in addition, the tile arch has excellent heat insulating performance and strong compression and load bearing performance.
Furthermore, the tile arches between adjacent layers are arranged in a staggered mode.
Through the technical scheme, the tile arches between the adjacent layers are arranged in a staggered mode, so that force transmission between the layers is facilitated, and the supporting strength of the end support is improved.
A processing technology of a composite heat-insulation prefabricated overhead steam heat-insulation pipe comprises the following steps:
s1, wrapping and fixing a glass wool felt on the periphery of the steam pipe to form a glass wool layer;
s2, splicing and fixing a plurality of tile arches to form a supporting layer through a mould;
s3, sleeving a shell on the supporting layer, and performing foaming operation between the shell and the supporting layer to form a foam layer;
s4, taking the shell, the foam layer and the supporting layer off the die together;
s5, inserting the steam pipe and the glass wool layer wrapped around the steam pipe into the supporting layer;
and S6, embedding a plurality of tile arches at the end part of the foam layer between the support layer and the steam pipe to form a support.
Through the technical scheme, the supporting layer is arranged between the foam layer and the glass wool layer, the structural strength is enhanced, the foam layer is assisted to bear disturbance such as external pressure, collision and the like, the shell of the heat-insulation pipe is prevented from being extruded, and then the heat-insulation cotton is extruded, so that the heat-insulation performance of the heat-insulation cotton layer is reduced or even loses efficacy, the supporting layer is also used for bearing the pressure during foaming, the glass wool is used for ensuring the peripheral part of the steam pipe, and the processing and the production are convenient.
Further, step S2 specifically includes the following steps:
s21, sleeving at least two sliding films on the mold column;
and S22, laying a plurality of tile arches on the outer sliding film, and fixing the adjacent tile arches by using an adhesive.
Through the technical scheme, the shell, the foam layer and the supporting layer can be conveniently taken down from the die together in the following process by utilizing the sliding performance between the two layers of sliding films.
Furthermore, the material of the sliding film is high-density polyethylene, and both sides of the sliding film are smooth surfaces.
Through the technical scheme, the high-density polyethylene is easy to obtain, the material is cheap, and the surface is smooth and has excellent sliding performance.
Further, step S3 specifically includes the following steps:
s31, sleeving a shell on the supporting layer, and fixing the shell on a position coaxial with the supporting layer;
s32, sealing the space between the support layer and the shell;
and S33, filling a foaming material between the supporting layer and the shell.
Through above-mentioned technical scheme, be favorable to the foaming material fully to fill between supporting layer and the shell.
Furthermore, a flame retardant is doped in the foaming material.
Through above-mentioned technical scheme, further improve the fire behavior of foam blanket.
Further, step S5 specifically includes the following steps:
s51, winding the silk ribbon to the periphery of the glass wool layer, wherein the silk ribbon is in a state of extruding the glass wool felt;
s52, inserting the steam pipe, the glass wool layer and the silk ribbon into the supporting layer together;
and S53, drawing out the silk ribbon.
Through above-mentioned technical scheme, adopt the silk ribbon extrusion glass cotton layer, reduce its radius, be convenient for insert steam pipe, glass cotton layer and silk ribbon together in the holding layer.
Compared with the prior art, the invention has the beneficial effects that:
(1) the proportion of the glass wool in the heat-insulating pipe is increased, so that the proportion of the foam layer is reduced, the production cost of the heat-insulating pipe is reduced, and the heat-insulating pipe is convenient to popularize, popularize and use;
(2) because the glass wool layer has stronger high-temperature resistance than the foam layer, the glass wool layer is arranged on the periphery close to the steam pipe, so that the use safety of the heat-insulating pipe can be effectively improved;
(3) according to the invention, the supporting layer is arranged between the foam layer and the glass wool layer, so that the structural strength is enhanced, the foam layer is assisted to bear disturbance such as external pressure, collision and the like, the shell of the heat-insulating pipe is prevented from being extruded, and then the heat-insulating cotton is extruded, so that the heat-insulating property of the heat-insulating cotton layer is reduced or even loses efficacy, and the supporting layer is also used for bearing the pressure during foaming, so that the glass wool is adopted at the peripheral part of the steam pipe, and the processing and the production are convenient;
(4) furthermore, a foam layer is formed by foaming between the shell and the supporting layer, the processing mode can completely eliminate gaps between inner layers of the heat preservation pipe, and the heat preservation inner space is complete and has no vacancy, so that additional heat loss caused by cold air permeation is avoided, convection of air in the heat preservation pipe is also avoided, and heat loss caused by convection in the heat preservation layer in the traditional heat preservation structure is eliminated;
(5) furthermore, the complete metal shell is adopted to isolate rainwater, so that additional heat loss caused by rainwater is avoided;
(6) furthermore, by adopting the high-strength microporous calcium silicate tiles as the pipeline support, the additional heat loss caused by the heat bridge formed by adopting the steel plate as the pipeline support of the traditional overhead pipeline is eliminated.
Drawings
FIG. 1 is a schematic structural view of a composite heat-insulating prefabricated overhead steam heat-insulating pipe;
FIG. 2 is an end view of a composite insulated prefabricated overhead steam insulated pipe;
FIG. 3 is a block flow diagram of the process of the present invention.
Reference numerals: 1. a steam pipe; 2. a housing; 3. a glass wool layer; 4. a support layer; 5. a foam layer; 6. and (4) supporting.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following provides a detailed description of the present invention with reference to examples and drawings, but the embodiments of the present invention are not limited thereto.
A composite heat-insulating prefabricated overhead steam heat-insulating pipe comprises a steam pipe 1, wherein the steam pipe 1 is a steel pipe, a shell 2 is sleeved on the steam pipe 1, the shell 2 is a hard aluminum alloy thin plate, the thickness of the shell is ~ 1.5.5 mm, the shell can be a stainless steel plate, a color steel plate, a galvanized iron sheet and a composite metal thin plate as required, and an annular glass wool layer 3, a supporting layer 4 and a foam layer 5 are sequentially arranged between the steam pipe 1 and the shell 2 from inside to outside.
The glass wool layer 3 wraps the periphery of the steam pipe 1, the glass wool layer 3 is made of glass wool felt, the glass wool felt is made of conventional heat insulation materials, and the heat insulation performance of the glass wool felt is second to that of polyurethane foam, namely the heat insulation material with the lowest price. The price of the polyurethane foam is only one third of the price of the same volume polyurethane foam. The heat preservation performance can be three-quarters of that of polyurethane foam with the same volume, the glass wool felt can endure the temperature of more than 100 ℃ to 300 ℃, and the conventional polyurethane foam can not endure in a high-temperature area.
The supporting layer 4 is arranged between the foam layer 5 and the glass wool layer 3, the foam layer 5 is filled between the supporting layer 4 and the shell 2, the material of the foam layer 5 is rigid polyurethane foam, the rigid polyurethane foam has the best heat insulation performance in conventional heat insulation materials, and the compressive strength of the rigid polyurethane foam can reach more than 0.3 MPa. The polyurethane foam is not water-absorbing and water-proof, is continuous, tight and seamless, and can fill heat-insulating spaces in any shapes. The outer insulation layer as a pipe, pipe fitting (tee bend in pipe network, etc.) is irreplaceable. In addition, since the foam layer 5 is formed by injection foaming, the foam layer 5 formed by foaming also has a function of connecting the housing 2 and the support layer 4.
However, the glass wool felt has no fixed shape, cannot bear compression and moisture absorption, is afraid of water immersion, is easy to deform and deteriorate, and has excellent performance which is not influenced by various weak characteristics if being used as a pipeline thermal insulation material alone. According to the invention, the foam layer 5 is arranged on the periphery of the glass wool layer 3, so that a solid protective shell is provided for the glass wool, and the inherent short plate of the glass wool is complemented, thereby greatly reducing the product cost of the heat distribution pipeline; wherein the supporting layer 4 is used for protecting and supporting, and prevents that the foam from extruding the glass wool layer 3 in the foaming process, which causes the heat preservation performance of the glass wool layer 3 to be reduced and even become invalid.
A support 6 is arranged at the end part of the glass wool layer 3 between the support layer 4 and the steam pipe 1, the support layer 4 and the support 6 are spliced into a ring shape by a plurality of tile arches, and the tile arches are firmly bonded and fixed by a special adhesive. In addition, the tile arches between adjacent layers are arranged in a staggered manner when viewed from the end face, so that force transmission between layers is facilitated, and the supporting strength of the end support 6 is improved.
A processing technology of a composite heat-insulation prefabricated overhead steam heat-insulation pipe is shown in figure 3, and based on the composite heat-insulation prefabricated overhead steam heat-insulation pipe, the processing technology comprises the following steps:
s1, wrapping and fixing a glass wool felt on the peripheral side of the steam pipe 1 to form a glass wool layer 3; the density rho of the glass wool felt is equal to 48kg/m through high-speed cultivation, the glass wool felt with higher density can be adopted, but the glass wool felt with lower density than 48kg/m through high-speed cultivation cannot be adopted. When the steam temperature is higher and the glass wool felt cannot bear the steam, a layer of high-temperature-resistant aluminum silicate wool felt can be laid on one side close to the steam steel pipe, and then the glass wool felt is externally coated.
S2, splicing and fixing a plurality of tile arches to form a supporting layer 4 through a mould;
the method specifically comprises the following steps of S21, sleeving two layers of sliding films on a mold column, wherein the sliding films are made of high-density polyethylene, two sides of each sliding film are smooth surfaces, S22, laying a plurality of tile arches on the outer layer of sliding films, the tile arches are high-strength microporous calcium silicate tiles, the thickness of each tile arch is ~ 40mm, the compression strength of each tile arch is 0.5MPa ~ 2.0.0 MPa, the tile arches are firmly bonded by a special adhesive, and the tile arches form a whole, and the normal plane and the axial plane are coated with the adhesive.
S3, sleeving the shell 2 on the supporting layer 4, and performing foaming operation between the shell 2 and the supporting layer 4 to form a foam layer 5;
the method specifically comprises the following steps of S31, sleeving a shell 2 on a supporting layer 4, wherein the shell 2 is a hard aluminum alloy thin plate, the thickness of the shell 2 is 0.5mm ~ 1.5.5 mm, and a stainless steel plate, a color steel plate, a galvanized iron sheet and a composite metal thin plate can be selected according to requirements, the shell 2 is spirally rolled by a special machine to form a bite to form a thin-wall metal sleeve, continuous ribs are pressed on the metal plate in the rolling process to improve the rigidity of the sleeve, the shell 2 is fixed on the position coaxial with the supporting layer 4 through a die, S32, two ends are sealed by sealing end plates to seal a space between the supporting layer 4 and the shell 2, S33, two ends of the side wall of the shell 2 are respectively provided with a hole, one hole is used as a material injection hole, the other hole is used as an air outlet hole, foaming is carried out by adopting a pouring method between the supporting layer 4 and the shell 2 to form a foam layer 5, and a flame.
S4, taking the shell 2, the foam layer 5 and the support layer 4 off the die together, and tearing off the sliding film, wherein the two layers of sliding films are arranged, so that the taking-off operation is convenient;
s5, inserting the steam pipe 1 and the glass wool layer 3 wrapped on the peripheral side of the steam pipe into the supporting layer 4;
the method specifically comprises the following steps: s51, winding the silk ribbon to the periphery of the glass wool layer 3, wherein the silk ribbon is in a state of extruding the glass wool felt, so that the radius of the glass wool layer 3 is reduced, and the subsequent operation is facilitated; s52, inserting the steam pipe 1 and the glass wool layer 3 into the support layer 4 together; and S53, drawing out the silk ribbon.
S6, a plurality of tiles are embedded between the support layer 4 and the steam pipe 1 at the end of the foam layer 5 to form a rest 6 to bear the weight of the steam pipe 1. The tile arch is a high-strength microporous calcium silicate tile, and a graphite lubricant is soaked on the arc surface on the inner side of the tile arch, so that the axial displacement of the steam pipe 1 after heating is facilitated.
In summary, the following steps:
in the invention, the ratio of the glass wool in the heat-insulating pipe is increased, so that the ratio of the foam layer 5 is reduced, and the production cost of the heat-insulating pipe is further reduced; the glass wool layer 3 has stronger high temperature resistance than the foam layer 5, and the glass wool layer 3 is arranged on the periphery close to the steam pipe 1, so that the use safety of the heat-insulating pipe can be effectively improved; according to the invention, the supporting layer 4 is arranged between the foam layer 5 and the glass wool layer 3, so that the structural strength is enhanced, the foam layer 5 is assisted to bear disturbance such as external pressure, collision and the like, the heat insulation pipe shell 2 is prevented from being extruded, and then the heat insulation wool is extruded, so that the heat insulation performance of the heat insulation wool layer is reduced or even loses efficacy, and the supporting layer 4 is also used for bearing the pressure during foaming, so that the glass wool is adopted at the part of the periphery of the steam pipe 1, and the processing and the production are convenient.
Furthermore, in the invention, the foaming operation is carried out between the shell 2 and the supporting layer 4 to form the foam layer 5, the processing mode can completely eliminate gaps between layers inside the heat preservation pipe, and the heat preservation internal space is complete and has no vacancy, thereby not only avoiding additional heat loss caused by cold air permeation, but also avoiding air convection inside the heat preservation pipe and eliminating heat convection loss inside the heat preservation pipe in the traditional heat preservation structure.
Furthermore, the invention adopts the complete metal shell 2 to isolate the rainwater, so that the additional heat loss caused by the rainwater is avoided.
Furthermore, the high-strength microporous calcium silicate tiles are used as the pipeline support 6, so that the additional heat loss caused by a heat bridge formed by using a steel plate as a pipeline support in the traditional overhead pipeline is eliminated; in addition, the graphite lubricant is soaked on the arc surface on the inner side of the tile arch, so that the steam pipe 1 can be subjected to axial displacement after being heated, and the sliding type pipeline expansion and contraction device is particularly suitable for pipeline expansion and contraction in a sliding mode.
Compared with the same prefabricated tile-foam composite overhead steam heat-insulating pipe in a factory, the heat-insulating material can save half of the cost at most when the same heat-insulating effect is realized. Wherein, the pipe diameter is bigger, and the heat preservation is thicker, and the effect is more obvious.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. A composite heat-insulation prefabricated overhead steam heat-insulation pipe comprises a steam pipe (1), wherein a shell (2) is sleeved on the steam pipe (1), and is characterized in that a glass wool layer (3), a supporting layer (4) and a foam layer (5) are arranged between the steam pipe (1) and the shell (2);
the glass wool layer (3) is wrapped on the periphery of the steam pipe (1), the supporting layer (4) is arranged between the foam layer (5) and the glass wool layer (3), and the foam layer (5) is filled between the supporting layer (4) and the shell (2).
2. The composite heat-insulating prefabricated overhead steam heat-insulating pipe as claimed in claim 1, characterized in that a support (6) is arranged between the support layer (4) and the steam pipe (1) at the end of the glass wool layer (3).
3. The composite heat-insulating prefabricated overhead steam heat-insulating pipe as claimed in claim 2, wherein the supporting layer (4) and the support (6) are formed by splicing and fixing a plurality of tile arches.
4. The composite insulating prefabricated overhead steam insulating pipe as claimed in claim 3, wherein the tile arches between adjacent layers are staggered.
5. The processing technology of the composite heat-insulation prefabricated overhead steam heat-insulation pipe is characterized by comprising the following steps of:
s1, wrapping and fixing a glass wool felt on the peripheral side of the steam pipe (1) to form a glass wool layer (3);
s2, splicing and fixing a plurality of tile arches to form a supporting layer (4) through a mould;
s3, sleeving the shell (2) on the supporting layer (4), and performing foaming operation between the shell (2) and the supporting layer (4) to form a foam layer (5);
s4, taking down the shell (2), the foam layer (5) and the support layer (4) from the die;
s5, inserting the steam pipe (1) and the glass wool layer (3) wrapped around the steam pipe into the support layer (4);
s6, embedding a plurality of tile arches at the end of the foam layer (5) between the support layer (4) and the steam pipe (1) to form a support (6).
6. The processing technology of the composite heat-insulating prefabricated overhead steam heat-insulating pipe according to claim 5, wherein the step S2 specifically comprises the following steps:
s21, sleeving at least two sliding films on the mold column;
and S22, laying a plurality of tile arches on the outer sliding film, and fixing the adjacent tile arches by using an adhesive.
7. The processing technology of the composite heat-insulating prefabricated overhead steam heat-insulating pipe as claimed in claim 6, wherein the material of the sliding film is high-density polyethylene, and both sides of the sliding film are provided with smooth surfaces.
8. The processing technology of the composite heat-insulating prefabricated overhead steam heat-insulating pipe according to claim 5, wherein the step S3 specifically comprises the following steps:
s31, sleeving the shell (2) on the supporting layer (4), and fixing the shell (2) on a position coaxial with the supporting layer (4);
s32, sealing the space between the support layer (4) and the shell (2);
s33, filling foaming materials between the supporting layer (4) and the shell (2).
9. The process for manufacturing a composite heat-insulating prefabricated overhead steam heat-insulating pipe according to claim 8, wherein a flame retardant is doped in the foaming material.
10. The processing technology of the composite heat-insulating prefabricated overhead steam heat-insulating pipe according to claim 9, wherein the step S5 specifically comprises the following steps:
s51, winding the silk ribbon to the periphery of the glass wool layer (3), wherein the silk ribbon is in a state of extruding the glass wool felt;
s52, inserting the steam pipe (1), the glass wool layer (3) and the silk ribbon into the support layer (4) together;
and S53, drawing out the silk ribbon.
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| CN201910928818.2A CN110594532A (en) | 2019-09-28 | 2019-09-28 | Composite heat-insulation prefabricated overhead steam heat-insulation pipe and processing technology thereof |
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Cited By (1)
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| CN113700984A (en) * | 2021-07-14 | 2021-11-26 | 云南智仁节能环保工程有限公司 | Integrated customizable composite heat-insulating pipe and production method thereof |
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