CN201074707Y - Hollow plastic heat insulation pipe between wall layers - Google Patents
Hollow plastic heat insulation pipe between wall layers Download PDFInfo
- Publication number
- CN201074707Y CN201074707Y CNU2007201031375U CN200720103137U CN201074707Y CN 201074707 Y CN201074707 Y CN 201074707Y CN U2007201031375 U CNU2007201031375 U CN U2007201031375U CN 200720103137 U CN200720103137 U CN 200720103137U CN 201074707 Y CN201074707 Y CN 201074707Y
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Abstract
The utility model discloses a pipe in the construction and the chemical field, namely a multi-wall interlaminar hollow plastic thermal insulation and cold reserving pipeline, which comprises an outer pipe wall, a hollow tube, a heat insulating layer, a planting bar and a current-carrying pipe (a plastic inner wall pipe and an inner-wall metal pipe), the pipe walls are connected by the planting bar, the hollow tube whose back-lash thickness of each layer wall is between 5 and 18mm chosen air as a thermal insulator, and heat insulating material is chosen and added on the double-wall hollow tube wall whose back-lash thickness of layer walls is between 30 and 100mm, both ends of the pipeline are sealed, and the standard of a pipeline heat insulting engineering can be achieved without doing damp-proof and water-proof treatment. The pipeline connection adopts soldered joint, adhesive joint and flange joint, the double-wall hollow tube under phi 63mm adopts the metal pipe of the utility model to connect, lateral section of a pipe body takes a circular shape and a square shape. Raw materials for production and processing of the hollow thermal insulation and cold reserving pipeline are suitable for various plastics, and the usage and application scope of the pipeline are determined by the combination properties of various plastics. The application temperature of the plastic pipe is below 40 DEG C to 100DEG C.
Description
Affiliated technical field
The utility model relates to a kind of water supply and sewage construction engineering and chemical industry class conveying gas-liquid tubing of being used for, and is hollow plastic insulation, cold insulation pipeline between a kind of many parietal layers specifically.
Background technique
Kinds of plastic pipe is various, can be divided into real wall plastic tube and double-walled hollow tube, real wall plastic tube is that plastic resin is made " template " tubing, and the double-walled hollow tube comprises: double-walled stud hollow tube, double-wall corrugated pipe, double-walled spiral pipe, double-walled hollow radial rib reinforced pipe, hollow wall entwining tube, double-walled foamed sandwich pipe.Because the heat resistance of plastics is relatively poor, can't compare with metal tube, cause the product application of plastic tube to be restricted.Present most popular plastic tube is not have the waste pipe and the cold water pipe of pressing.Caliber is done greatly in order to make for double-walled hollow tube, double-wall corrugated pipe and hollow wall entwining tube, intensity improves, and has been designed to the double-walled hollow series of various ways, and the variation of pipe wall type mostly is from improving force structure, reducing the materials aspect and consider.The plastics thermal conductivity is little, the distinct advantages of good heat insulating does not obtain embodying in above product.Reason is that above piping row all are the cold water pipe products.The thermal insulation property of double-walled foamed sandwich pipe has improved 35% than original product, but its design also belongs to no pressure water pipe series.
Summary of the invention
The utility model provides hollow plastic insulation, cold insulation pipeline between a kind of many parietal layers, utilizes the air thermal conductivity little, in limited double-walled space, as Grashof husband criterion G
rOn dutyly draw criterion P with Prandtl
rValue was less than 1700 o'clock, and the air of double-walled space can't overcome the resistance of displacement viscosity, did not exist in and produced heat transfer free convection in the confined space.Work as G
rP
rValue was greater than 1700 o'clock, and air produces around convection heat exchange in the confined space, and cold and hot loss strengthens, for guaranteeing the effect of the insulation of double-walled hollow pipeline, cold insulation thermal insulation, in double-walled hollow, dose heat-insulating material, make to form pure heat conduction in the hollow, do not have convection current and radiation heat transfer phenomenon.The hollow layer of hollow tube has guaranteed sealing in technological design, with atmospheric isolation, and heat insulation and moisture-proof.Be heat insulation layer, be the composite tube of carrying object with many walls of plastics hollow bulb, expanded application area with the embedded metal pipe.The insulation of double-walled hollow, cold insulation air channel have been designed.At the aluminium foil or the brushing aluminium paint of hollow wall and the sticking molten low-launch-rate of outer wall, reduce the heat loss through radiation of hollow tube inside and outside wall.In use easy to connect for the double-walled hollow tube, invention has designed easy-to-dismount metal connecting tube spare.
The technological scheme that its technical problem that solves the utility model adopts is: hollow plastic insulation between a kind of many parietal layers, the cold insulation pipeline, by outer tube wall, hollow tube, heat insulation layer, bar planting, current-carrying tube (plastic liner pipe, interior wall metallic pipe) forms, connect by bar planting between tube wall, to select for use in 5～18mm with the air be heat insulator to gap thickness between each layer of hollow tube wall, gap thickness is selected the interpolation thermoinsulation material for use between double-walled hollow tube parietal layer wall in 30～100mm, pipe ends is airtight, pipeline connects selects welding for use, bonding, flange plate connects and is connected with metal pipe element, and the body shape of cross section divides circular, square.
The value of the nominal pipe piping row S value of hollow plastic insulation between many parietal layers, cold insulation pipeline is still used the NBS of same material tubing, and its nominal wall thickness, nominal size of pipe are constant.
The Placement Φ 63mm of all-plastic hollow tube is following to adopt newly-designed metal connecting tube spare (see figure 1) to be connected to the master, also can adopt other ripe connecting means.The above all-plastic tubing of Φ 63mm adopts modes such as hot melt connects, flange connects, bonding.
The double-walled hollow thermal insulation pipe of metal inner surface pipe and plastics outer wall pipe box dress after pressure testing is finished in interior wall metallic pipe connection (screwed connection, flange connect, weld), connects plastic packaging outer wall thermal insulation pipe layer again.Hot body medium temperature in the double-walled hollow thermal insulation pipe embedded metal pipe pipe should be in 120 ℃.The load pressure of embedded metal pipe will be determined by the performance of the used metallic material of tube wall.Dose the standard identical (seeing Table three) of thermoinsulation material in double-walled hollow thermal insulation pipe embedded metal pipe and the double-walled hollow thermal insulation pipe hollow layer.
The insulation of hollow plastic pipe between many parietal layers, cold insulation layer standard be in pipe during 100 ℃ of hot fluids and during cold fluid-40 ℃ according to relevant national standard design be incubated, the cold insulation layer thickness.
In technique scheme, the inner tubal wall external diameter of pipe of said hollow plastic insulation, cold insulation pipe adopts the nominal standard measure of tubing, the convenient use.
In technique scheme, said hollow plastic insulation cold insulation pipe outer wall wall thickness and bar planting Thickness Design scheme are divided four kinds.First kind is not load of outer wall, and wall thickness is 1mm, 1.5mm, the thick 1mm of being of muscle (seeing Table).Two kinds of specifications of second kind of branch: the one, hang the dress specification, wall thickness is respectively 1.6mm, 2mm, muscle is thick to be same thickness.The 2nd, bury the ground specification, wall thickness is respectively 2mm, 3mm, muscle is thick the same.The third wall thickness, muscle be thick to be a specification 4mm.The 4th kind is tailor-made according to user's technical requirements, the thick 5mm that is of the wall thickness of sample and muscle.
In technique scheme, the thickness of said hollow plastic insulation cold insulation pipe hollow gap is determined with the tube fluid temperature, is guaranteeing G
rP
rValue made the hollow size realize maximization less than 1700 o'clock.
In technique scheme, the quantity specifications of said hollow plastic insulation cold insulation pipe and double-walled hollow embedded metal pipe hollow reinforcement planting (is seen Fig. 2-Figure 11), all-plastic hollow tube 1 type (existing Fig. 2)-8 types (existing Fig. 9), double-walled hollow embedded metal pipe 4 types (existing Fig. 5)-8 types (existing Fig. 9).
In technique scheme, said double-walled hollow plastic airduct, air channel specification are determined external form by space, on-the-spot place and air quantity, wind speed, and hollow layer divides 30mm, 40mm, 50mm, 60mm.
The beneficial effects of the utility model are, the heat insulation layer and the integrated production of inner tubal wall of hollow plastic insulation, cold insulation pipe between many parietal layers, and technology is simple, and is easy for installation.Be not subjected in the normal pressure heat insulation layer of sealing season, weather, influence, removed the protection against the tide of pipeline, anti-wet process and maintenances in several years expense once from, under the service condition of regulation, can use 50 years.Insulation cold insulation layer is air or the thermoinsulation material dosed, material therefor cheapness, environmental protection, durable.The hollow outer wall intensity of underground pipe below 0.8 meter, can guarantee 20 tons ground load at buried depth, and distortion does not need to add in addition sleeve pipe in allowed band.The hollow thermal insulation layer can use under water.
Description of drawings
In the drawings, the 1st, plastic hollow tubing; The 2nd, the outer wall nut; The 3rd, the inwall nut; The 4th, fittings body; The 5th, collar; The 6th, seal ring.
Accompanying drawing 2 is a kind of double-walled hollow three muscle tube section figure of the present utility model;
Accompanying drawing 3 is a kind of double-walled hollow four muscle tube section figure of the present utility model;
Accompanying drawing 4 is a kind of double-walled hollow five muscle tube section figure of the present utility model;
Accompanying drawing 5 is a kind of double-walled hollow six muscle tube section figure of the present utility model;
Accompanying drawing 6 is a kind of double-walled hollow seven muscle tube section figure of the present utility model;
Accompanying drawing 7 is a kind of double-walled hollow eight muscle tube section figure of the present utility model;
Accompanying drawing 8 is a kind of double-walled hollow nine muscle tube section figure of the present utility model;
Accompanying drawing 9 is a kind of double-walled hollow ten muscle tube section figure of the present utility model;
Accompanying drawing 10 is the two hollow tube sectional views of a kind of three walls of the present utility model;
Accompanying drawing 11 is a kind of five walls, four hollow tube sectional views of the present utility model.
Many walls hollow tube tube wall quantity to six wall (i.e. five hollows).Its wall, six wall schematic representation are slightly.
Embodiment
The production and processing technology of hollow insulation, cold insulation pipe is applicable to all types of plastic to be the production and processing of main raw material(s) between many parietal layers, goes out to be suitable for the multi-walled pipes of all temps according to the various performance design of variety classes plastics.
Below by embodiment, and in conjunction with the accompanying drawings, the technological scheme of model utility is described in further detail.
Embodiment 1: hollow plastic insulation, cold insulation pipeline between a kind of many parietal layers, as shown in figure 11, divide three extruders to composite machine head.Head adopts the forming technique of double-deck (the hollow layer inwall is three layers) co-extrusion.Select for use aluminium powder in 0.8～8% ratio add in the plastic raw material of hollow wall top layer, double-deck (or three layers) co-extrusion, aluminium powder and plastics mixing layer be controlled at 0.15mm thick about.Hollow wall is thick can make hollow wall plastics and aluminium powder mixing wall during less than 2mm, need not be three-layer co-extruded.To adopt with inside and outside typing casing wall be standard measure for hollow tube caliber typing between many parietal layers, charges into the gas of gradient pressure and feed the method for cooling water in tube wall hollow in interior typing tube core, with the pipe inside and outside wall typing of hollow tube between many parietal layers.
Embodiment 2: hollow plastic insulation, cold insulation pipeline between a kind of many parietal layers, as shown in figure 10, adopt inner tubal wall, outer tube wall with the hollow tube wall, separate and extrude machine shaping, wall is wanted dip-coating or sandblast aluminium dust lacquer in the hollow layer, inside and outside the pipe, enters composite machine head and inside and outside tube wall welding after the drying or stick with glue to connect.
Embodiment 3: hollow plastic insulation, cold insulation pipeline between a kind of many parietal layers, as shown in figure 11, an extruding and moulding of multi-walled pipes before the dipping lacquer seals interior pipe two-port in the hollow, prevents that aluminium paint from entering interior pipe.After dipping lacquer is finished, pipe shutoff in opening.
Embodiment 4: hollow plastic insulation between a kind of many parietal layers, cold insulation pipeline, as Fig. 2-shown in Figure 9, in double-walled, dose in the air through the thermal insulating material after the removal moisture drying, as super glass wool, then with flange plate fusion joining tube two ends and sealing.
Embodiment 5: hollow plastic insulation, cold insulation pipeline between a kind of many parietal layers, as Fig. 2-shown in Figure 9, can dose other adiabatic objects in the double-walled hollow, as foamed plastics, the corresponding production of the external form annulus of filling foamed plastics and thickness with the hollow tube cast, also can with tube wall, integrated production, use the three-layer co-extruded explained hereafter that goes out of core layer foaming and go out the insulation of double-walled core layer foaming, cold insulation pipe.
Embodiment 6: hollow plastic insulation between a kind of many parietal layers, cold insulation pipeline, as Fig. 2-shown in Figure 9, filling heat insulator technology is equally applicable to double-walled hollow tube embedded metal pipe and air channel (concrete specification sees Table three).
Embodiment 7: hollow plastic insulation, cold insulation pipeline between a kind of many parietal layers, as shown in Figure 1, the connection of metal pipe element, the muscle of tubing (1) termination double-walled hollow is prescinded 15～20mm with cutter with muscle, outer wall nut (2) is inserted in tubing, whether the seal ring (6) of checking metal pipe element is intact, then metal connecting piece (5), (4) penetrated tubing, makes fittings body (4) root of pipe fitting and tubing (1) head connect reality.Tighten inwall nut (3).Pipe outer wall nut (2) is not tightened earlier, treats to operate after the local pressure testing again, prevents that spigot from leaking to hollow tube.As finding to leak the place, the water in the hollow tube be put only, otherwise can be reduced heat insulation effect, lose insulation effect.
Embodiment 8: hollow plastic insulation between a kind of many parietal layers, cold insulation pipeline, hot melt connects (butt joint), adopts same material, with the tubing and the plastic pipe welding of the trade mark.The tubing of the different trades mark, hot melt between pipe fitting are connected, should adopt and judge through test and can connect after quality of connection can be guaranteed.The pipe outer wall and the inner wall thickness of many walls hollow tube are different, and heating time is different, hot melt jig and heating plate are done some technical finesses get final product (no longer narration here).The hollow tube wall thickness less than inner tubal wall,, can set the heating time and the temperature of each layer through the heating plate of transforming respectively and come welding, can not influence the butt joint quality.
Embodiment 9: hollow plastic insulation, cold insulation pipeline between a kind of many parietal layers, flange connects, external diameter is greater than many walls hollow insulation cold insulation pipe of Φ 75mm, being responsible for producing tubing by manufacturer is the specification product of one with the welding of blue dish, wire connection and welding are arranged, and produce supporting flange plate, elbow and the threeway of same size.
Interconnection technique and accessory with excessive pipe fitting and plastic tube and metallic conduit are produced in a large number.Ripe processing technique is adopted in the pipe fitting production of metal insert in the tube wall, can satisfy the tipping demand of double-walled hollow thermal insulation pipe.
Annex: table one
Crosslinked polyethylene double-walled hollow tube
Unit: mm
Annotate: piping row S value is decided according to the selection of material mechanical property in the table.Bearing pressure 0.6～1.6MP in the pipe
a
Table two
Hollow plastic insulation cold insulation pipe between many parietal layers
Annotate: 1. the mechanical properties of materials that piping row S value basis is selected for use in the table is decided, and the S value is to be example with the PEX plastics in the table.
2. Biao Nei unit is mm.
3. δ is a gap thickness between the hollow wall in the table.
4. e is a hollow wall thickness in the table.
Table three
Dose thermoinsulation material insulation, cold insulation pipe in the double-walled hollow tube
Annotate: 1. hollow thickness 50mm is an adiabatic thickness commonly used in the table, and hollow thickness calibration size can be selected for use in 30-100mm according to caliber and adiabatic the requirement.
2. all-plastic pipe and embedded metal pipe all are suitable for above specification.
3. after hollow thickness changes, manage the corresponding change of outer wall thickness and hollow reinforcement planting thickness.
4. the various sizes of the above pipe of nominal diameter φ 225mm mark slightly.
Claims (4)
1. hollow plastic insulation between parietal layer, cold insulation pipeline more than one kind are made up of outer tube wall, hollow tube, heat insulation layer, bar planting, current-carrying tube, and current-carrying tube comprises plastic liner pipe and interior wall metallic pipe; It is characterized in that connecting by bar planting between tube wall, to select for use in 5～18mm with the air be heat insulator to gap thickness between each layer of hollow tube wall, gap thickness is selected the interpolation thermoinsulation material for use between double-walled hollow tube parietal layer wall in 30～100mm, pipe ends is airtight, pipeline connects selects for use welding, bonding, flange plate to connect and is connected with metal pipe element, and the body shape of cross section divides circle, square.
2. according to hollow plastic insulation, cold insulation pipeline between the 1st described many parietal layers of claims, the metal connecting tube spare nut (3) that it is characterized in that the double-walled hollow tube is connected fastening with pipe fitting joint body (4), nut (2) is connected fastening with nut (3) and connects fastening double-walled hollow tube (1) jointly; Fittings body (4) divides yin, yang two kinds of screw threads.
3. according to hollow plastic insulation, cold insulation pipeline between the 1st described many parietal layers of claims, it is characterized in that managing cross section has parallel clearance between the circle of concentric different-diameter and double-walled square or rectangular, double-walled hollow tube, the two hollow tubes of three walls, wall three hollow tubes, five walls, four hollow tubes, six walls, five hollow tubes, double-walled rectangular air channel, double-walled square air channel are arranged.
4. according to hollow plastic insulation, cold insulation pipeline between the 1st described many parietal layers of claims, it is characterized in that can the embedded metal pipe in the double-walled hollow tube tube wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201031375U CN201074707Y (en) | 2007-01-08 | 2007-01-08 | Hollow plastic heat insulation pipe between wall layers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201031375U CN201074707Y (en) | 2007-01-08 | 2007-01-08 | Hollow plastic heat insulation pipe between wall layers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201074707Y true CN201074707Y (en) | 2008-06-18 |
Family
ID=39519970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201031375U Expired - Fee Related CN201074707Y (en) | 2007-01-08 | 2007-01-08 | Hollow plastic heat insulation pipe between wall layers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201074707Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101520119B (en) * | 2009-04-10 | 2011-02-16 | 李恒清 | Concentric double layer oil pipe |
| CN107504287A (en) * | 2017-10-12 | 2017-12-22 | 中国空气动力研究与发展中心低速空气动力研究所 | A kind of preparation method of icing wind tunnel cold insulation structure |
| CN109611934A (en) * | 2018-01-13 | 2019-04-12 | 陈奎宏 | A kind of simple type tube-in-tube thermal cycle system |
| CN110585561A (en) * | 2019-09-28 | 2019-12-20 | 深圳麦普奇医疗科技有限公司 | Medical sterile catheter sheath |
| US10571062B2 (en) | 2017-06-23 | 2020-02-25 | United Technologies Corporation | Middle threaded fitting |
| CN113944828A (en) * | 2021-09-06 | 2022-01-18 | 夏岿阳 | Chemical industry equipment anticorrosion insulation construction |
-
2007
- 2007-01-08 CN CNU2007201031375U patent/CN201074707Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101520119B (en) * | 2009-04-10 | 2011-02-16 | 李恒清 | Concentric double layer oil pipe |
| US10571062B2 (en) | 2017-06-23 | 2020-02-25 | United Technologies Corporation | Middle threaded fitting |
| US11578829B2 (en) | 2017-06-23 | 2023-02-14 | Raytheon Technologies Corporation | Middle threaded fitting |
| CN107504287A (en) * | 2017-10-12 | 2017-12-22 | 中国空气动力研究与发展中心低速空气动力研究所 | A kind of preparation method of icing wind tunnel cold insulation structure |
| CN107504287B (en) * | 2017-10-12 | 2023-04-07 | 中国空气动力研究与发展中心低速空气动力研究所 | Manufacturing method of freezing wind tunnel cold insulation structure |
| CN109611934A (en) * | 2018-01-13 | 2019-04-12 | 陈奎宏 | A kind of simple type tube-in-tube thermal cycle system |
| CN109611934B (en) * | 2018-01-13 | 2022-03-22 | 陈奎宏 | Simple pipe-in-pipe geothermal circulating system |
| CN110585561A (en) * | 2019-09-28 | 2019-12-20 | 深圳麦普奇医疗科技有限公司 | Medical sterile catheter sheath |
| CN113944828A (en) * | 2021-09-06 | 2022-01-18 | 夏岿阳 | Chemical industry equipment anticorrosion insulation construction |
| CN113944828B (en) * | 2021-09-06 | 2022-12-27 | 临沂市春明化工有限公司 | Chemical industry equipment anticorrosion insulation construction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080618 Termination date: 20120108 |