CN203671146U - Heat-preserving pipeline - Google Patents
Heat-preserving pipeline Download PDFInfo
- Publication number
- CN203671146U CN203671146U CN201320798645.5U CN201320798645U CN203671146U CN 203671146 U CN203671146 U CN 203671146U CN 201320798645 U CN201320798645 U CN 201320798645U CN 203671146 U CN203671146 U CN 203671146U
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- Prior art keywords
- inner tube
- outer tube
- insulation pipe
- heat
- insulation
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Abstract
The utility model provides a heat-preserving pipeline. The heat-preserving pipeline comprises an inner pipe and an outer pipe arranged outside the inner pipe in a sleeved mode. A closed cavity is formed between the inner pipe and the outer pipe. A corundum ceramic layer is arranged on the inner surface of the inner pipe, and a reflecting and heat-insulating layer is arranged on the outer surface of the inner pipe. The heat-preserving pipeline has the advantages that the heat-preserving pipeline is resistant to high temperature, abrasion and corrosion, good in heat-preserving performance, and high in stability and reliability of performance; meanwhile, because refractory bricks or castable is not laid and external heat preservation is not added, construction is simple, cost is lowered, and the size and the weight of the heat-preserving pipeline can be reduced easily.
Description
Technical field
The utility model relates to pipe technology, relates in particular to a kind of insulation pipe.
Background technique
Coal gasification is a kind of chemical science and technology that coal is converted to inflammable gas, be that Coal Chemical Industry gas stove will be fixed lump coal or particulate coal or fine coal and convert coal gas to by violent combustion oxidation, when coal burning, coal cinder is cracked, in coal gas, conventionally can carry a large amount of coal dusts secretly, therefore, the coal gas of high temperature pipeline of coal gasifier system must meet high temperature resistant, corrosion-resistant, the basic demand that can be incubated; In addition, from the coal gas of high temperature process high temperature cyclone separator of coal gasifier processing, a large amount of coal dusts of carrying secretly in coal gas are separated, send into again energy-saving secondary coal burning gasification in coal gasifier, requirement high temperature resistant, wear-resistant, corrosion-resistant, that can be incubated that high temperature returning charge pipeline also must meet by high temperature returning charge pipeline.
In prior art, the technological scheme that the manufacture of above-mentioned coal gas of high temperature pipeline and high temperature returning charge pipeline adopts is:
Build refractory brick or not only build refractory brick but also add castable or only use castable without refractory brick at pipe interior, between refractory brick gap, filling refractory mortar and be fixed;
Between refractory brick and steel pipe internal-surface, fill refractory fibrous material, expand with heat and contract with cold and play insulation effect to compensate;
At outer surface of steel tube anticorrosion with painting paint or add as required ceramic fiber blanket thermal insulation layer, and wrap up in aluminium suitcase, with the requirement of the insulation of having a full house.
But there is following problem in technique scheme:
(1) coal gas of high temperature that contains coal dust and corrosive gas washes away refractory brick in pipeline or castable formation, wearing and tearing, corrosion, the gap of refractory brick may form air-flow path, accelerate the damage of refractory brick or castable liner on the one hand, made on the other hand to build the heat insulation effect degradation of refractory brick or castable liner;
(2) effect of expanding with heat and contract with cold of blow-on or blowing out easily makes castable surface crack, can make crack between refractory brick and refractory mortar, and these cracks can further accelerate to wash away, wearing and tearing, and corrosion, and affect heat insulation effect;
(3) refractory brick, castables etc. have strengthened size and the weight of pipeline;
(4) build refractory brick or do castable, adding external thermal insulation, complicated construction technique, workload is large, maintenance service difficulty; Especially inside liner damages to lose efficacy and is difficult to maintenance.
Model utility content
The utility model provides a kind of insulation pipe, has high temperature resistant, wear-resistant, corrosion-resistant, energy thermal insulation property, not only stable and reliable for performance, and construction is simple, and cost declines.
The utility model provides a kind of insulation pipe, comprises inner tube and is set in the outer tube in described inner tube outside, between described inner tube and described outer tube, is formed with closed cavity;
On the internal surface of described inner tube, be provided with corundum ceramic layer, on the outer surface of described inner tube, be provided with reflective insulation layer.
In insulation pipe as above, on the internal surface of described outer tube, be provided with reflected coat layer, on the outer surface of described outer tube, be provided with reflection antirust coat.
In insulation pipe as above, described outer tube is rolled and is formed by the two-sided aluminum-zinc alloy sheet metal for bright mirror surface or the silicon sheet metal of aluminizing.
In insulation pipe as above, on described outer tube, be connected with expansion joint, for compensating the described outer tube length change causing of expanding with heat and contract with cold.
In insulation pipe as above, between described outer tube and described inner tube, be provided with multiple support rings that are set in described inner tube.
In insulation pipe as above, each described support ring is combined by two semicircular ring, and is provided with axial hole on each described support ring.
In insulation pipe as above, also comprise the flange that is arranged on two ends, the two ends of described inner tube and described outer tube are connected on described flange.
In insulation pipe as above, on the inner side end of described flange, be provided with positioning boss, in order to the connection on described flange positions to described inner tube and described outer tube.
In insulation pipe as above, on described flange, be provided with the evacuation passageway being communicated with described closed cavity.
In insulation pipe as above, the aperture place of described evacuation passageway is provided with the technique pipe plug that shutoff is used.
In insulation pipe as above, be communicated with and be provided with vacuum valve with described evacuation passageway.
In insulation pipe as above, on the outside end face of described flange, be provided with Sealing installation position.
The insulation pipe that the utility model provides, have high temperature resistant, wear-resistant, corrosion protection, the feature of good heat insulating, and stability and reliability higher; Meanwhile, owing to not building refractory brick or castable, do not add outer insulation, make construction simple, cost declines, and is also beneficial to the size and the weight that reduce insulation pipe.
Accompanying drawing explanation
The structural representation of the insulation pipe that Fig. 1 provides for the utility model embodiment;
The structural representation of the insulation pipe that is provided with expansion joint that Fig. 2 provides for the utility model embodiment.
Embodiment
The utility model provides a kind of insulation pipe, and as shown in Figure 1, this insulation pipe comprises inner tube 1 and is set in the outer tube 2 in inner tube 1 outside, between inner tube 1 and outer tube 2, is formed with closed cavity 3; Wherein, closed cavity 3 can be evacuated, and plays blocking-up thermoconvection and conduction of heat, realizes vacuum heat-insulating;
In the present embodiment, inner tube 1 adopts steel pipe, is provided with corundum ceramic layer 101 on the internal surface of inner tube 1, is provided with reflective insulation layer 102 on the outer surface of inner tube 1.
Concrete, inner tube 1 internal surface adopts from spreading aluminothermy high temperature-centrifugal pressure casting technique and forms liner corundum ceramic internal surface, and it is high that corundum ceramic has hardness, and chemical inertness is good, heat-resisting, wear-resisting, anti-corrosion, heat shock resistance and mechanical shock resistance.Concrete forming process is: inner tube 1 is placed in the pipe die of centrifuge, in inner tube 1, adding iron oxide red (is ferric oxide Fe
2o
3with tri-iron tetroxide Fe
3o
4) and aluminium powder (AL) mixture, this mixture is called thermite, when reaching certain speed, the rotation of centrifuge pipe die obtains after enough centrifugal force, light thermite through a Mars, thermite is self-burning immediately,, in the time spreading, there is violent chemical reaction (2AL+Fe in burning rapid spread
2o
3=AL
2o
3+ 2Fe+836KJ and 3Fe
3o
4+ 8AL=4AL
2o
3+ 9Fe+3265KJ) resultant is stable type α-Al after thermit reaction
2o
3(being corundum) and iron, and emit a large amount of heats, these heats make original material (Fe, Fe in steel pipe
2o
3, Fe
3o
4and AL) and reacted resultant (α-Al
2o
3and Fe) become liquation, because reaction is very fast, only have the several seconds, frit reaction, under centrifugal action, separates by proportion size rapidly, the proportion (7.85g/cm of iron
3) be α-Al
2o
3proportion (3.95g/cm
3) twice, heavier iron is centrifuged power and is thrown to inner tube 1 inwall, lighter α-Al
2o
3be distributed in the internal layer of iron.Due to inner tube 1 heat absorption and heat transfer rapidly, α-Al
2o
3reach very soon solidifying point with Fe, layering is solidified.The lined ceramics steel pipe finally forming is respectively corundum ceramic layer from inside to outside, take iron as main transition layer, and outside steel pipe layer; In this process: iron liquid and the α-Al of high-temperature fusion
2o
3liquid, contacts with steel pipe inner wall, makes steel pipe inner wall in half molten state, makes iron layer and steel pipe form metallurgy combination, and iron layer and Corundum Ceramics interlayer also form strong bonded, and it is in conjunction with compression shear strength (i.e. intensity in the time axially ceramic layer being extruded)>=15MPa; Pottery steel pipe crushing strength (intensity when interior pipe pottery crushing from managing)>=350MPa.
In the present embodiment, inner tube 1 forms liner corundum ceramic layer by certainly spreading aluminothermy high temperature-centrifugal pressure casting technique, makes the internal surface of inner tube 1 have hardness high, and chemical inertness is good, heat-resisting, wear-resisting, anti-corrosion, heat shock resistance and the good feature of mechanical shock resistance.
In the present embodiment, the reflective insulation layer 102 arranging on the outer surface of inner tube 1 has high temperature resistant, and energy reflective thermal radiation also stops heat conducting thermal insulation function.In the present embodiment, arranging specifically of reflective insulation layer 102 can form by spray coating heat preservation insulating moulding coating on the outer surface of inner tube 1, and insulating mold coating preferably adopts ZS-1 type heat insulating coatings or RLHY-12/800 type high temperature insulating thermal insulation coatings.
In the present embodiment, on the internal surface of outer tube 2, be provided with reflected coat layer 201, make the internal surface of outer tube 2 there is reflective thermal radiation ability, on outer surface, be provided with reflection antirust coat 202, make the outer surface of outer tube 2 there is reflective thermal radiation ability, simultaneously can be antirust.
In the present embodiment, outer tube 2 is preferably rolled and is formed by the two-sided aluminum-zinc alloy sheet metal for bright mirror surface or the silicon sheet metal of aluminizing, and aluminum-zinc alloy sheet metal or the silicon sheet metal of aluminizing have higher reflective thermal radiation ability, have good anticorrosive effect simultaneously.
Wherein, the coating that aluminum-zinc alloy sheet metal can preferably adopt the silicon of composition (ratio by weight) aluminium by 55% and 43.4% zinc and 1.6% to form, the aluminum-zinc alloy sheet metal of this coating has that heat reflectivity is high, the feature of good heat resistance, excellent corrosion resistance and good processability; The coating that the silicon sheet metal of aluminizing can preferably adopt composition (ratio by weight) aluminium by 90% and 10% silicon to form, the silicon sheet metal of aluminizing of this coating has the features such as heat-resisting quantity, heat reflectivity, good corrosion resistance.
In the present embodiment, as shown in Figure 1, be provided with multiple support rings 4 that are set in inner tube 1 between inner tube 1 and outer tube 2, form closed cavity 3 for guaranteeing between inner tube 1 and outer tube 2, wherein, support ring 4 can be made by high temperature resistant heat insulation nonmetallic material.For convenience of installing, each support ring 4 can be combined by two semicircular ring.For ease of closed cavity 3 is vacuumized, can on support ring 4, be provided with axial hole, the cavity of support ring 4 both sides is communicated with.
The insulation pipe that the present embodiment provides also comprises the flange 5 that is arranged on two ends, flange 5 needs to adopt can resistant to elevated temperatures steel manufacturing (material of flange 5 specifically can be determined according to fluid temperature (F.T.) height), and the two ends of inner tube 1 and outer tube 2 are connected on flange 5.Concrete, on the inner side end of flange 5, be provided with positioning boss 501, for the connection on flange 5 positions to the end of inner tube 1 and outer tube 2, wherein, the end of inner tube 1 is close on the inner peripheral surface of positioning boss 501, and the end of outer tube 2 is close on the outer peripheral surface of positioning boss 501.
In the present embodiment, on the end face of the outside of flange 5, be provided with Sealing installation position 502, for Sealing is installed, when being specifically applied in pipeline and being connected with pipeline, the gap between the salable flange being connected of Sealing.
In the present embodiment, on flange 5, be provided with the evacuation passageway 7 being communicated with sealed cavity 3, for closed cavity 3 is vacuumized, also can suppress leak detection experiment by evacuation passageway 7.Aperture in evacuation passageway 7 can arrange technique pipe plug 8, for shutoff is carried out in this aperture.In addition, be connected with vacuum valve 9 with evacuation passageway 7, vacuum valve 9 can be connected with vacuum pump, and sealed cavity 3 is vacuumized.
In the present embodiment, be compensation outer tube 2 length change causing of expanding with heat and contract with cold, as shown in Figure 2, also can on outer tube 2, connect expansion joint 6 is set as required, arranging of expansion joint 6 be mainly used on longer pipeline.
The concrete working process of insulation pipe according to Fig. 1 and Fig. 2, the present embodiment being provided is below described:
(1), select steel pipe as inner tube 1 according to fluid temperature (F.T.), the also inside and outside seal welding of positioning boss 501 location and installation of flange 5 is passed through (for Fig. 2 in the two ends of inner tube 1, before second flange 5 of welding, need first pack the also interim technique of expansion joint 6 into fixes), check weldquality, adopt and on the internal surface of inner tube 1, form liner corundum ceramic layer 101 from spreading aluminothermy high temperature-centrifugal pressure casting technique; Again by high temperature resistant, the heat insulating coatings (as ZS-1) of energy reflective thermal radiation is sprayed on inner tube 1 outer surface, form reflective insulation layer 102, (for Fig. 2, in the time of spraying, need move axially the position of expansion joint 6, after having sprayed, expansion joint 6 be installed on the positioning boss 501 that is positioned at flange 5 and seal welding);
(2), by the fixing support ring 4 use high-temperature plastics cementing suitable position in inner tube 1;
(3), outer tube 2 is packed into and seal welding by positioning boss 501 location of flange 5, outer tube 2 specifically can adopt the sheet metal of double-sided light minute surface plate golding aluminium zinc alloy or silumin to be wound on the outside of inner tube 1, and by welding behind positioning boss 501 location, (for the pipeline in Fig. 2, consider expanding with heat and contract with cold of pipeline, can on outer tube 2, add compensation pipeline expand with heat and contract with cold change expansion joint 6, now outer tube 2 one end and positioning boss 501 location sealing welding, the other end and expansion joint 6 cylindrical seal weldings);
After having assembled, two flanges 5, inner tube 1, the space between outer tube 2 forms confined space 3 (in the time evacuation passageway 7 use technique pipe plugs 8 being blocked to sealing);
(4), suppress leak test by evacuation passageway 7, carry out if desired repair welding;
(5), vacuum valve 9 is opened and is connected to form closed system with the vacuum pump with vacuum gauge, vacuumize with vacuum pump, make the degree of vacuum of system reach 1.3 × 10
-2～-3pa, closes locking vacuum valve 4, in use, should keep suitable degree of vacuum, can again vacuumize if desired.
The insulation pipe that the utility model embodiment provides, by corundum ceramic layer being set at the internal surface of inner tube, outer surface arranges reflective insulation layer, and between inner and outer pipes, form vacuum structure, effectively block thermoconvection and heat conducting hot transmission way, insulation pipe is had high temperature resistant, wear-resistant, corrosion protection, the feature of good heat insulating, and stability and reliability higher; Meanwhile, owing to not building refractory brick or castable, do not add outer insulation, make construction simple, cost declines, and is beneficial to the size and the weight that reduce insulation pipe.
Finally it should be noted that: above each embodiment, only in order to the technical solution of the utility model to be described, is not intended to limit; Although the utility model is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technological scheme that still can record aforementioned each embodiment is modified, or some or all of technical characteristics is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of the each embodiment's technological scheme of the utility model.
Claims (12)
1. an insulation pipe, is characterized in that, comprises inner tube and is set in the outer tube in described inner tube outside, between described inner tube and described outer tube, is formed with closed cavity;
On the internal surface of described inner tube, be provided with corundum ceramic layer, on the outer surface of described inner tube, be provided with reflective insulation layer.
2. insulation pipe according to claim 1, is characterized in that, on the internal surface of described outer tube, is provided with reflected coat layer, is provided with reflection antirust coat on the outer surface of described outer tube.
3. insulation pipe according to claim 2, is characterized in that, described outer tube is rolled and formed by the two-sided aluminum-zinc alloy sheet metal for bright mirror surface or the silicon sheet metal of aluminizing.
4. insulation pipe according to claim 1, is characterized in that, on described outer tube, is connected with expansion joint, for compensating the described outer tube length change causing of expanding with heat and contract with cold.
5. insulation pipe according to claim 1, is characterized in that, is provided with multiple support rings that are set in described inner tube between described outer tube and described inner tube.
6. insulation pipe according to claim 5, is characterized in that, each described support ring is combined by two semicircular ring, and is provided with axial hole on each described support ring.
7. according to the arbitrary described insulation pipe of claim 1-6, it is characterized in that, also comprise the flange that is arranged on two ends, the two ends of described inner tube and described outer tube are connected on described flange.
8. insulation pipe according to claim 7, is characterized in that, on the inner side end of described flange, is provided with positioning boss, in order to described inner tube and described outer tube, the connection on described flange positions.
9. insulation pipe according to claim 7, is characterized in that, is provided with the evacuation passageway being communicated with described closed cavity on described flange.
10. insulation pipe according to claim 9, is characterized in that, the aperture place of described evacuation passageway is provided with the technique pipe plug that shutoff is used.
11. insulation pipes according to claim 9, is characterized in that, are communicated with and are provided with vacuum valve with described evacuation passageway.
12. insulation pipes according to claim 8, is characterized in that, on the outside end face of described flange, are provided with Sealing installation position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320798645.5U CN203671146U (en) | 2013-12-06 | 2013-12-06 | Heat-preserving pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320798645.5U CN203671146U (en) | 2013-12-06 | 2013-12-06 | Heat-preserving pipeline |
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| Publication Number | Publication Date |
|---|---|
| CN203671146U true CN203671146U (en) | 2014-06-25 |
Family
ID=50967439
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320798645.5U Expired - Fee Related CN203671146U (en) | 2013-12-06 | 2013-12-06 | Heat-preserving pipeline |
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|---|---|---|---|---|
| CN104329536A (en) * | 2014-10-27 | 2015-02-04 | 宁夏天纵泓光余热发电技术有限公司 | Submerged arc furnace flue vacuum insulation pipe with high-strength, alkali-proof and fireproof pouring material layer |
| CN104329538A (en) * | 2014-10-27 | 2015-02-04 | 宁夏天纵泓光余热发电技术有限公司 | Submerged arc furnace flue vacuum insulation pipe with heat insulating and fireproof pouring material layer |
| CN104329537A (en) * | 2014-10-27 | 2015-02-04 | 宁夏天纵泓光余热发电技术有限公司 | Submerged arc furnace flue vacuum insulation pipe with compound fireproof pouring material layer |
| CN104373754A (en) * | 2014-10-23 | 2015-02-25 | 无锡金顶石油管材配件制造有限公司 | Petroleum pipeline with heat preservation layers |
| CN104406041A (en) * | 2014-11-28 | 2015-03-11 | 无锡纳润特科技有限公司 | Connection structure for inner supporting tube and outer supporting tube at front end of chemical liquid gas bottle |
| CN104406010A (en) * | 2014-10-27 | 2015-03-11 | 宁夏天纵泓光余热发电技术有限公司 | Pouring type flue gas insulation tube for submerged arc furnace |
| CN104455928A (en) * | 2014-10-27 | 2015-03-25 | 宁夏天纵泓光余热发电技术有限公司 | Multifunctional submerged arc furnace smoke heat-preserving pipe |
| CN104455927A (en) * | 2014-10-27 | 2015-03-25 | 宁夏天纵泓光余热发电技术有限公司 | Heat preservation steel pipe |
| CN105318143A (en) * | 2015-01-05 | 2016-02-10 | 萍乡市通宇特种陶瓷有限责任公司 | Pipeline heat preservation device |
| CN105822870A (en) * | 2015-01-04 | 2016-08-03 | 刘正彬 | Insulating pipe |
| CN107289232A (en) * | 2017-08-04 | 2017-10-24 | 合肥千聚环保科技有限公司 | A kind of layer structure anti-freeze pipe of integral type |
| CN108679327A (en) * | 2018-06-04 | 2018-10-19 | 苏州赛易特环保科技有限公司 | A kind of environment-friendly type water processing equipment water pipe |
| CN108709023A (en) * | 2018-06-04 | 2018-10-26 | 苏州赛易特环保科技有限公司 | A kind of water pipe of the water treatment facilities with splicing function |
| CN108910967A (en) * | 2018-06-04 | 2018-11-30 | 苏州赛易特环保科技有限公司 | A kind of environmental protection type water processing equipment with long service life |
| CN110307405A (en) * | 2019-06-25 | 2019-10-08 | 西安交通大学 | A kind of centering type Double-layer sleeve-type heat supply pipeline |
| CN110375117A (en) * | 2019-07-30 | 2019-10-25 | 大唐青岛西海岸热力有限公司 | A kind of heat distribution pipeline support device reducing heat loss |
| CN110864172A (en) * | 2019-11-27 | 2020-03-06 | 安徽省含山县皖中减速机械有限公司 | Novel compression-resistant flange for pipeline connection |
| CN112833270A (en) * | 2021-02-05 | 2021-05-25 | 黄志中 | Natural gas conveying pipeline |
| CN112984282A (en) * | 2021-04-26 | 2021-06-18 | 胜利油田胜机石油装备有限公司 | Thermal insulation pipeline |
| CN114135742A (en) * | 2021-12-13 | 2022-03-04 | 中海石油(中国)有限公司 | Heat insulation structure and heat insulation method of double-layer heat insulation pipeline |
| WO2022152100A1 (en) * | 2021-01-14 | 2022-07-21 | 上海兴邺材料科技有限公司 | Vacuum pipe |
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2013
- 2013-12-06 CN CN201320798645.5U patent/CN203671146U/en not_active Expired - Fee Related
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| CN104373754A (en) * | 2014-10-23 | 2015-02-25 | 无锡金顶石油管材配件制造有限公司 | Petroleum pipeline with heat preservation layers |
| CN104329537B (en) * | 2014-10-27 | 2016-08-24 | 宁夏天纵泓光余热发电技术有限公司 | There is the mineral heating furnace flue vacuum heat-preserving tube of composite castable refractory layer |
| CN104406010B (en) * | 2014-10-27 | 2016-08-24 | 宁夏天纵泓光余热发电技术有限公司 | Pouring type mineral heating furnace flue insulating tube |
| CN104455928B (en) * | 2014-10-27 | 2016-11-23 | 宁夏天纵泓光余热发电技术有限公司 | Multi-functional mineral heating furnace flue insulating tube |
| CN104406010A (en) * | 2014-10-27 | 2015-03-11 | 宁夏天纵泓光余热发电技术有限公司 | Pouring type flue gas insulation tube for submerged arc furnace |
| CN104329538A (en) * | 2014-10-27 | 2015-02-04 | 宁夏天纵泓光余热发电技术有限公司 | Submerged arc furnace flue vacuum insulation pipe with heat insulating and fireproof pouring material layer |
| CN104455928A (en) * | 2014-10-27 | 2015-03-25 | 宁夏天纵泓光余热发电技术有限公司 | Multifunctional submerged arc furnace smoke heat-preserving pipe |
| CN104455927A (en) * | 2014-10-27 | 2015-03-25 | 宁夏天纵泓光余热发电技术有限公司 | Heat preservation steel pipe |
| CN104329537A (en) * | 2014-10-27 | 2015-02-04 | 宁夏天纵泓光余热发电技术有限公司 | Submerged arc furnace flue vacuum insulation pipe with compound fireproof pouring material layer |
| CN104329538B (en) * | 2014-10-27 | 2016-06-08 | 宁夏天纵泓光余热发电技术有限公司 | There is the mineral heating furnace flue vacuum heat-preserving tube of insulating refractory casting material layer |
| CN104329536A (en) * | 2014-10-27 | 2015-02-04 | 宁夏天纵泓光余热发电技术有限公司 | Submerged arc furnace flue vacuum insulation pipe with high-strength, alkali-proof and fireproof pouring material layer |
| CN104406041A (en) * | 2014-11-28 | 2015-03-11 | 无锡纳润特科技有限公司 | Connection structure for inner supporting tube and outer supporting tube at front end of chemical liquid gas bottle |
| CN105822870A (en) * | 2015-01-04 | 2016-08-03 | 刘正彬 | Insulating pipe |
| CN105318143A (en) * | 2015-01-05 | 2016-02-10 | 萍乡市通宇特种陶瓷有限责任公司 | Pipeline heat preservation device |
| CN107289232A (en) * | 2017-08-04 | 2017-10-24 | 合肥千聚环保科技有限公司 | A kind of layer structure anti-freeze pipe of integral type |
| CN108679327A (en) * | 2018-06-04 | 2018-10-19 | 苏州赛易特环保科技有限公司 | A kind of environment-friendly type water processing equipment water pipe |
| CN108709023A (en) * | 2018-06-04 | 2018-10-26 | 苏州赛易特环保科技有限公司 | A kind of water pipe of the water treatment facilities with splicing function |
| CN108910967A (en) * | 2018-06-04 | 2018-11-30 | 苏州赛易特环保科技有限公司 | A kind of environmental protection type water processing equipment with long service life |
| CN110307405A (en) * | 2019-06-25 | 2019-10-08 | 西安交通大学 | A kind of centering type Double-layer sleeve-type heat supply pipeline |
| CN110375117A (en) * | 2019-07-30 | 2019-10-25 | 大唐青岛西海岸热力有限公司 | A kind of heat distribution pipeline support device reducing heat loss |
| CN110375117B (en) * | 2019-07-30 | 2020-12-25 | 大唐青岛西海岸热力有限公司 | Heat distribution pipeline supporting device capable of reducing heat loss |
| CN110864172A (en) * | 2019-11-27 | 2020-03-06 | 安徽省含山县皖中减速机械有限公司 | Novel compression-resistant flange for pipeline connection |
| WO2022152100A1 (en) * | 2021-01-14 | 2022-07-21 | 上海兴邺材料科技有限公司 | Vacuum pipe |
| CN112833270A (en) * | 2021-02-05 | 2021-05-25 | 黄志中 | Natural gas conveying pipeline |
| CN112984282A (en) * | 2021-04-26 | 2021-06-18 | 胜利油田胜机石油装备有限公司 | Thermal insulation pipeline |
| CN114135742A (en) * | 2021-12-13 | 2022-03-04 | 中海石油(中国)有限公司 | Heat insulation structure and heat insulation method of double-layer heat insulation pipeline |
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