CN111546485B - Conical heat-insulating pipeline and preparation method thereof - Google Patents
Conical heat-insulating pipeline and preparation method thereof Download PDFInfo
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- CN111546485B CN111546485B CN202010409971.7A CN202010409971A CN111546485B CN 111546485 B CN111546485 B CN 111546485B CN 202010409971 A CN202010409971 A CN 202010409971A CN 111546485 B CN111546485 B CN 111546485B
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- pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds
- B28B21/10—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means
- B28B21/22—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using rotatable mould or core parts
- B28B21/30—Centrifugal moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
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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
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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
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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
- F16L9/00—Rigid pipes
- F16L9/006—Rigid pipes specially profiled
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Thermal Insulation (AREA)
Abstract
The invention relates to a conical heat-insulating pipeline and a preparation method thereof. The conical heat-insulating pipe consists of an inner layer and an outer layer, wherein the outer layer is provided with a plurality of outer conical heat-insulating pipes, the inner layer is provided with a plurality of inner conical heat-insulating pipes, one outer conical heat-insulating pipe is sleeved with one inner conical heat-insulating pipe, and the inner conical heat-insulating pipes are annularly buckled with each other, so that the connecting gap is prolonged, and the heat loss is reduced; the preparation method of the heat-insulating pipeline is simple and convenient to use, and the ceramic fiber is used as the main material of the heat-insulating pipeline, so that the compressive strength of the prepared heat-insulating pipeline is improved, the heat conductivity coefficient is reduced, and the heat-insulating performance can be improved.
Description
Technical Field
The invention belongs to the technical field of heat-insulating pipelines, and particularly relates to a conical heat-insulating pipeline and a preparation method thereof.
Background
The pipeline is a common part in industry and daily life, the pipeline is widely applied to a liquid and gas conveying pipe network, a chemical pipeline is used for petroleum, chemical engineering, central heating, central air-conditioning ventilation pipelines, municipal engineering and the like, and the quality of construction directly relates to the level of the infrastructure of life and property safety level of people.
Pipeline transportation refers to a pipeline specially used for transporting liquid and gas materials, and heat preservation needs to be performed on the pipeline sometimes in the transportation process, so that the influence of low-temperature climate on pipeline transportation or the loss of heat in the transportation process is prevented.
The existing pipeline has poor heat insulation performance, poor pressure resistance and complex preparation method.
The present invention has been made in view of the above circumstances.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the conical heat-insulating pipeline and the preparation method thereof.
The first purpose of the invention is to provide a conical heat-insulating pipeline, wherein the conical heat-insulating pipeline is of a hollow structure formed by respectively sleeving and buckling a plurality of adjacent outer conical heat-insulating pipes on a plurality of inner conical heat-insulating pipes, and two ends of the conical heat-insulating pipeline are respectively movably connected with a pipeline heat-insulating inner end enclosure and a pipeline heat-insulating outer end enclosure.
Furthermore, the outer cone thermal insulation pipe and the inner cone thermal insulation pipe are of axisymmetric structures, the outer pipe of the inner cone thermal insulation pipe is a conical pipe, the inner pipe of the inner cone thermal insulation pipe is a cylindrical pipe, and the inner diameter of one end of the outer cone thermal insulation pipe is the same as the outer diameter of the inner cone thermal insulation pipe, so that the outer cone thermal insulation pipe is sleeved on the inner cone thermal insulation pipe.
Furthermore, the outer pipe at one end of the outer conical heat-insulating pipe sleeve buckled with the inner conical heat-insulating pipe is a first conical pipe, the outer pipe at the other end of the outer conical heat-insulating pipe sleeve is a cylindrical pipe, and the inner pipe is a second conical pipe correspondingly arranged on the first conical pipe, so that two adjacent outer conical heat-insulating pipes can be mutually buckled.
Furthermore, the pipeline heat-insulating inner sealing head and the pipeline heat-insulating outer sealing head are both in a conical pipe structure.
Furthermore, the heat conductivity coefficient of the conical heat-insulating pipeline is less than or equal to 0.044W/m.k, and the compressive strength is greater than or equal to 4 Mpa.
The conical heat-insulating pipe comprises an inner layer and an outer layer, wherein the outer layer is provided with a plurality of outer conical heat-insulating pipes, the inner layer is provided with a plurality of inner conical heat-insulating pipes, one outer conical heat-insulating pipe is sleeved with one inner conical heat-insulating pipe, the inner conical heat-insulating pipes are annularly buckled with one another, a connecting gap is prolonged, and heat loss is reduced.
The second purpose of the invention is to provide a preparation method of the conical heat-insulating pipeline, which comprises the following steps:
(1) mixing an inorganic binder with water, and stirring to obtain a uniformly mixed solution;
(2) mixing ceramic fiber cotton with the uniformly mixed solution, and stirring to obtain mixed slurry;
(3) and putting the mixed slurry into a head box, uniformly feeding under the stirring condition, centrifugally forming, demolding, drying, polishing and chamfering to obtain the conical heat-insulating pipeline.
Ceramic fiber is a fibrous light refractory material, and has the advantages of light weight, high temperature resistance, good thermal stability, low thermal conductivity, small specific heat, mechanical shock resistance and the like, so the ceramic fiber is widely applied to the industries of machinery, metallurgy, chemical industry, petroleum, ceramics, glass, electronics and the like. According to the invention, the ceramic fiber is used as the main material of the heat-insulating pipeline, so that the compressive strength of the prepared heat-insulating pipeline is improved, the heat conductivity coefficient is reduced, and the heat-insulating performance can be improved.
The inorganic binder in the invention is commercially available raw material.
Further, the length of the ceramic fiber cotton is 5-50 mm.
Further, the mass ratio of the inorganic binder to the water in the step (1) is 2:2-4, and the stirring time is 25-35 min.
Further, the mass ratio of the inorganic binder to the water in the step (1) is 2:3, and the stirring time is 30 min.
Further, the mass ratio of the ceramic fiber cotton and the uniformly mixed solution in the step (2) is 2:0.5-1.5, preferably 2:1, and the stirring time is 20-30 min.
Further, the rotational inertia of the centrifugal machine in the step (3) is 2.8-3.2kg/m2The centrifugation speed is 500-2000r/min, and the centrifugation time is 2-3 h.
Compared with the prior art, the invention has the beneficial effects that:
(1) the conical heat-insulating pipe consists of an inner layer and an outer layer, wherein the outer layer is provided with a plurality of outer conical heat-insulating pipes, the inner layer is provided with a plurality of inner conical heat-insulating pipes, one outer conical heat-insulating pipe is sleeved with one inner conical heat-insulating pipe, and the inner conical heat-insulating pipes are annularly buckled with each other, so that the connecting gap is prolonged, and the heat loss is reduced;
(2) the preparation method of the heat-insulating pipeline is simple and convenient to use, and the ceramic fiber is used as the main material of the heat-insulating pipeline, so that the compressive strength of the prepared heat-insulating pipeline is improved, the heat conductivity coefficient is reduced, and the heat-insulating performance can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a sectional view of an assembly structure of a tapered heat-insulating pipe and a pipeline to be insulated according to the present invention;
FIG. 2 is a front view of the inner conical insulating tube of the present invention;
FIG. 3 is a sectional view in the A-A direction of the inner conical heat-insulating pipe of the present invention;
FIG. 4 is a front view of the external conical insulating tube of the present invention;
FIG. 5 is a sectional view in the direction B-B of the outer conical thermal insulation pipe of the present invention;
reference numerals
1-steel pipe, 2-outer cone thermal insulation pipe, 21-first cone pipe, 22-cylindrical pipe, 23-third cone pipe, 4-second cone pipe, 3-inner cone thermal insulation pipe, 31-fourth cone pipe, 4-pipeline thermal insulation outer end socket and 5-pipeline thermal insulation inner end socket.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Example 1
As shown in fig. 1 to 5, in the tapered heat preservation pipeline of this embodiment, a plurality of adjacent outer tapered heat preservation pipes 2 are respectively sleeved and buckled on a plurality of inner tapered heat preservation pipes 3 to form a hollow structure, and two ends of the tapered heat preservation pipeline are respectively movably connected with a pipeline heat preservation inner end enclosure 5 and a pipeline heat preservation outer end enclosure 4.
In a further scheme, the outer conical heat-insulating pipe 2 and the inner conical heat-insulating pipe 1 are both in an axisymmetric structure, the outer pipe of the inner conical heat-insulating pipe 3 is a conical pipe, the inner pipe is a cylindrical pipe, and the inner diameter of one end of the outer conical heat-insulating pipe 2 is the same as the outer diameter of the inner conical heat-insulating pipe 3, so that the outer conical heat-insulating pipe 2 is sleeved and buckled on the inner conical heat-insulating pipe 3. The outer pipe at one end of the outer conical heat-insulating pipe 2, which is sleeved and buckled with the inner conical heat-insulating pipe 3, is a first conical pipe 21, the outer pipe at the other end of the outer conical heat-insulating pipe is a cylindrical pipe 22, the inner pipe is a second conical pipe 24, which is correspondingly arranged on the first conical pipe 21, so that two adjacent outer conical heat-insulating pipes 2 can be sleeved and buckled with each other, that is, as shown in fig. 3 and 5, the first conical pipe 21 and the second conical pipe 24 are arranged in a matched manner, so that the first conical pipe 21 is sleeved and buckled on the second conical pipe 24, the third conical pipe 23 is arranged in a matched manner with the fourth conical pipe, so that the third conical pipe 23 is sleeved and buckled on the fourth conical pipe 31, and the pipeline heat-insulating inner end socket 5 and the pipeline heat-insulating outer end socket 4 are both conical pipes, so that the finally formed heat-insulating pipe is integrally sleeved and buckled on the steel pipe 1 (namely, a pipeline which needs heat insulation).
Example 2
The preparation method of the conical heat-insulating pipeline comprises the following steps:
(1) mixing an inorganic binder and water, wherein the mass ratio of the inorganic binder to the water is 1: 1, stirring for 25min to obtain a uniformly mixed solution;
(2) mixing ceramic fiber cotton with the uniformly mixed solution, wherein the mass ratio of the ceramic fiber cotton to the uniformly mixed solution is 2:0.5, and stirring for 30min to obtain mixed slurry;
(3) the mixed pulp is put into a head box, evenly fed under the stirring condition, centrifugally formed, and the rotational inertia of a centrifugal machine is 2.8kg/m2And centrifuging at a speed of 2000r/min for 2h, demolding, drying, and polishing the chamfer angle to obtain the conical heat-insulating pipeline.
Example 3
The preparation method of the conical heat-insulating pipeline comprises the following steps:
(1) mixing an inorganic binder with water, wherein the mass ratio of the inorganic binder to the water is 2:3, stirring for 30min to obtain a uniformly mixed solution;
(2) mixing ceramic fiber cotton with the uniformly mixed solution, wherein the mass ratio of the ceramic fiber cotton to the uniformly mixed solution is 2:1, and stirring for 25min to obtain mixed slurry;
(3) the mixed pulp is put into a head box, evenly fed under the stirring condition, centrifugally formed, and the rotational inertia of a centrifugal machine is 3kg/m2And (3) centrifuging at the speed of 1250r/min for 2.5h, demolding, drying, and polishing the chamfer angle to obtain the conical heat-insulating pipeline.
Example 4
The preparation method of the conical heat-insulating pipeline comprises the following steps:
(1) mixing an inorganic binder and water, wherein the mass ratio of the inorganic binder to the water is 1: 2, stirring for 35min to obtain a uniformly mixed solution;
(2) mixing ceramic fiber cotton with the uniformly mixed solution, wherein the mass ratio of the ceramic fiber cotton to the uniformly mixed solution is 2:1.5, and stirring for 20min to obtain mixed slurry;
(3) the mixed pulp is put into a head box, evenly fed under the stirring condition, centrifugally formed, and the rotational inertia of a centrifugal machine is 3.2kg/m2And (3) centrifuging at the speed of 500r/min for 3h, demolding, drying, and polishing the chamfer angle to obtain the conical heat-insulating pipeline.
The length of the ceramic fiber wool described in examples 2 to 4 was 50 mm.
Test example 1
The tapered heat-insulating pipes prepared in examples 2 to 4 were subjected to performance tests, and the results are shown in table 1.
TABLE 1
| Performance of | Example 2 | Example 3 | Example 4 |
| Coefficient of thermal conductivity (W/m. k) | 0.044 | 0.041 | 0.042 |
| Compressive strength (Mpa) | 4.0 | 6.5 | 5.8 |
Test example 2
The properties of the prepared heat-insulating pipes were examined under the same conditions as in example 3 except that the length of the ceramic fiber wool was changed, the ceramic fiber wool was cut into 5mm, 15mm and 25mm granular wool by a fiber cutter, and the fibers were not cut, and the results are shown in Table 2.
TABLE 2
It can be seen from table 2 that the length of the fibers has a small effect on the thermal conductivity and a large effect on the compressive strength, the longer the fibers, the greater the compressive strength.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. The conical heat-insulating pipeline is characterized in that the conical heat-insulating pipeline is of a hollow structure formed by respectively sleeving and buckling a plurality of adjacent outer conical heat-insulating pipes on a plurality of inner conical heat-insulating pipes, and two ends of the conical heat-insulating pipeline are respectively movably connected with a pipeline heat-insulating inner end enclosure and a pipeline heat-insulating outer end enclosure;
the outer pipe at one end of the outer conical heat-insulating pipe which is sheathed and buckled with the inner conical heat-insulating pipe is a first conical pipe, the outer pipe at the other end of the outer conical heat-insulating pipe is a cylindrical pipe, and the inner pipe is a second conical pipe which is correspondingly arranged on the first conical pipe, so that two adjacent outer conical heat-insulating pipes can be sheathed and buckled with each other; the first conical pipe and the second conical pipe are matched to enable the first conical pipe to be sleeved and buckled on the second conical pipe; the outer pipe of the inner conical heat-insulating pipe is set to be a fourth conical pipe, the inner pipe of the outer conical heat-insulating pipe is provided with a third conical pipe corresponding to the fourth conical pipe, the third conical pipe and the fourth conical pipe are arranged in a matched mode so that the third conical pipe is sleeved and buckled on the fourth conical pipe, and the pipeline heat-insulating inner sealing head and the pipeline heat-insulating outer sealing head are both in conical pipe structures so that the finally formed heat-insulating pipe is integrally buckled on a pipeline needing heat insulation in a cylindrical pipe sleeve mode.
2. The tapered heat preservation pipeline according to claim 1, characterized in that the outer tapered heat preservation pipe and the inner tapered heat preservation pipe are both of axisymmetric structure, the outer pipe of the inner tapered heat preservation pipe is a tapered pipe, the inner pipe is a cylindrical pipe, and the inner diameter of one end of the outer tapered heat preservation pipe is the same as the outer diameter of the inner tapered heat preservation pipe, so that the outer tapered heat preservation pipe is sleeved on the inner tapered heat preservation pipe.
3. The tapered heat-insulating pipeline according to claim 1, wherein the heat conductivity coefficient of the tapered heat-insulating pipeline is not more than 0.044W/m-k, and the compressive strength is not less than 4 MPa.
4. A method for preparing a tapered heat-insulating pipe according to any one of claims 1 to 3, comprising the steps of:
(1) mixing an inorganic binder with water, and stirring to obtain a uniformly mixed solution;
(2) mixing ceramic fiber cotton with the uniformly mixed solution, and stirring to obtain mixed slurry;
(3) and putting the mixed slurry into a head box, uniformly feeding under the stirring condition, centrifugally forming, demolding, drying, polishing and chamfering to obtain the conical heat-insulating pipeline.
5. The method for preparing the conical heat-insulating pipe according to claim 4, wherein the mass ratio of the inorganic binder to the water in the step (1) is 2:2-4, and the stirring time is 25-35 min.
6. The method for preparing the conical heat-insulating pipe according to claim 5, wherein the mass ratio of the inorganic binder to the water in the step (1) is 2:3, and the stirring time is 30 min.
7. The method for preparing the conical heat preservation pipe according to claim 4, characterized in that in the step (2), the mass ratio of the ceramic fiber cotton to the uniformly mixed solution is 2:0.5-1.5, and the stirring time is 20-30 min.
8. The method for preparing the conical heat preservation pipe as claimed in claim 7, wherein the mass ratio of the ceramic fiber cotton to the uniformly mixed solution in the step (2) is 2:1.
9. The method for preparing a tapered heat-insulating pipe according to claim 4, wherein the rotational inertia of the centrifuge in the step (3) is 2.8 to 3.2 kg-m2The centrifugation speed is 500-2000r/min, and the centrifugation time is 2-3 h.
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| CN202010409971.7A CN111546485B (en) | 2020-05-14 | 2020-05-14 | Conical heat-insulating pipeline and preparation method thereof |
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| CN111546485B true CN111546485B (en) | 2021-08-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2030947B1 (en) * | 2022-02-15 | 2023-08-21 | Tangshan Huaxian Tech Co Ltd | Production method for ultrafine ceramic fiber cotton thermal insulation sleeve for heat transfer pipeline |
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| DE3032174C1 (en) * | 1980-08-26 | 1982-03-25 | Bloom Engineering (Europa) GmbH, 4000 Düsseldorf | Fireproof sheathing made of insulating molded parts for vertical support members in heat treatment furnaces |
| CN101565322B (en) * | 2009-01-21 | 2014-09-17 | 徐艳姬 | Ceramic fiber fabric-reinforced microwave heating plate and chamber and manufacturing method thereof |
| CN101871548B (en) * | 2009-05-11 | 2012-04-11 | 大连康维科技有限公司 | Thermal insulation tile |
| GB0922121D0 (en) * | 2009-12-18 | 2010-02-03 | Wellstream Int Ltd | Flexible pipe including thermal insulation |
| CN204704478U (en) * | 2014-11-03 | 2015-10-14 | 中国石油大学(北京) | Based on the deep water pipe-in-pipe buckle arrestor of T-shaped section deformation element |
| CN204267989U (en) * | 2014-12-04 | 2015-04-15 | 艾维芳 | A kind of thermal-insulating pipe case |
| EP3112734B1 (en) * | 2015-06-30 | 2018-12-26 | Werner Zimmer | Pipe, particularly sewage pipe |
| CN205050616U (en) * | 2015-10-27 | 2016-02-24 | 沙玉琢 | Three taper sleeves of logging cable |
| CN206018034U (en) * | 2016-08-19 | 2017-03-15 | 宿迁明江化工有限公司 | A kind of pipeline configuration for material conveying |
| CN207880240U (en) * | 2018-02-09 | 2018-09-18 | 浙江海洋大学 | A kind of civil engineering nanoscale insulated piping |
| CN111068417B (en) * | 2020-01-03 | 2020-12-08 | 东华大学 | Fabric-reinforced high silica fiber filter tube and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| NL2030947B1 (en) * | 2022-02-15 | 2023-08-21 | Tangshan Huaxian Tech Co Ltd | Production method for ultrafine ceramic fiber cotton thermal insulation sleeve for heat transfer pipeline |
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