CN101666401A - Direct current heating urea solution delivery hose - Google Patents
Direct current heating urea solution delivery hose Download PDFInfo
- Publication number
- CN101666401A CN101666401A CN200910153444A CN200910153444A CN101666401A CN 101666401 A CN101666401 A CN 101666401A CN 200910153444 A CN200910153444 A CN 200910153444A CN 200910153444 A CN200910153444 A CN 200910153444A CN 101666401 A CN101666401 A CN 101666401A
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- urea solution
- solution delivery
- pipe
- direct current
- urea
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- Rigid Pipes And Flexible Pipes (AREA)
- Pipe Accessories (AREA)
- Resistance Heating (AREA)
Abstract
The invention provides a direct current heating urea solution delivery hose comprising a urea solution delivery inner tube and a macromolecule PTC hot wire, wherein the outer side of the urea solutiondelivery inner tube is tightly stuck to the macromolecule PTC hot wire with a self-thermal control function, and the PTC hot wire is led out via a lead and is connected with a control unit via a connector to heat the urea solution delivery inner tube. The urea solution delivery inner tube provided by the invention has enough strength, flexibility and ageing resistance, is not easy to permeate, can prevent urea solution from freezing, can prevent the urea solution delivery inner tube and urea solution from deteriorating because of local overheating, can favourably ensure that the SCR system can work at low temperature and urea solution flows in the pipeline, and has the advantages of anticorrosion and small abrasion.
Description
Technical field
The present invention relates to a kind of electric heating urea solution delivery hose.
Background technique
Satisfy the heavy-duty diesel vehicle of state's 4 emission standards, utilize selective catalytic reduction (SCR) exhaust after treatment system to handle nitrogen oxide (NOx), meet the environmental regulation requirement to reach, cardinal principle is to handle nitrogen oxide (NOx) by quantitatively spray into AdBlue (i.e. 32.5% urea liquid) in exhaust gas treating device, and AdBlue begins to freeze in the time of-11 ℃.When thawing, AdBlue returns normal solution state.At long-term cold snap is in the area of normal conditions, and the SCR that can't work because pipeline freezes is unacceptable.Therefore, it is imperative to have an introducing of urea liquid delivery line of heating function.Also there was urea liquid delivery pipe to see report with heating function in the past, but heat the urea liquid delivery pipe in the outside that this class pipe adopts general electric heating wire to be spirally wound on the urea liquid delivery pipe, the delivery pipe of this structure, no matter how high spiral density is, on the urea delivery pipe, always have the direct contacting point of electric heating wire and the direct temperature gradient of contacting point not, both caused to be difficult to carry out temperature control, gone bad because of localized hyperthermia makes urea delivery pipe and interior urea liquid thereof easily.
Summary of the invention
Technical problem to be solved by this invention provides a kind of direct current heating urea solution delivery hose from temperature controlling function, homogeneous heating of having that can be applied on the automobile.For this reason, the present invention is by the following technical solutions: it comprise urea liquid carry in pipe, the pipe outside fits tightly the high molecular PTC electrically-heated-wire that has from temperature controlling function in the transport urea solution, and draw by lead, be connected with control unit by connector assembly, realize urea liquid is carried the heating of interior pipe; Described high molecular PTC electrically-heated-wire is laid along the length direction of interior pipe, and the metal aluminum foil layer in the outside of pipe closely is wound with described high molecular PTC electrically-heated-wire also is contained in urea liquid is carried also is provided with insulation material layer at described metal aluminum foil layer.
By above technological scheme, electric heating urea liquid delivery pipe provided by the present invention had both had enough intensity, ductility and ageing-resistant, be difficult for infiltration again, when ambient temperature is lower than the temperature of control unit setting, the heater circuit conducting, closely the metal aluminum foil layer that twines can guarantee urea liquid is carried the even heating of the whole tube wall of interior pipe, when heating-up temperature reaches the upper limiting temperature of setting, the temperature function of limit certainly of PTC makes current blocking, thereby not only prevented urea liquid freeze but also avoid urea liquid carry in pipe and urea liquid local superheating and go bad, can guarantee work and urea liquid the flowing in pipeline of SCR system well at low temperature environment, advantage with corrosion-resistant and low abrasion, can be suitable for vehicle-mounted requirement, be suitable for automobile and use.
Description of drawings
Fig. 1 is an embodiment's provided by the present invention cross-sectional view.
Fig. 2 is an embodiment's provided by the present invention schematic representation.
Embodiment
With reference to accompanying drawing.The present invention includes composite urea solution and carry interior pipe 2, its skin 2.2 is the nylon skin, and its internal layer 2.1 is made of ethylene-tetrafluoroethylene copolymer (ETFE), and described internal layer and skin are combined as a whole.Fit tightly the high molecular PTC electrically-heated-wire 6 that has from temperature controlling function in the outer field outside of nylon; skin is the metal aluminum foil layer 7 with conduction hot merit energy again; this layer closely twines in pipe 2 and electrically-heated-wire 6 are included in the urea liquid conveying; also tight looping insulation material layer 5 outside metal aluminum foil layer 7; prevent that heat from leaking; play function of heat insulation, outermost surface is to have waterproof, antifrictional insulating protective layer 3.
Described nylon skin can adopt PA12 (get by the omega-lauric lactam ring-opening polymerisation or by the 12 polycondensation, be commonly called as nylon 12) material.The ETFE material of described internal layer belongs to a kind of fluoroplastic, has the characteristics of impermeabilisation, corrosion-resistant and low abrasion.Described outer field PA12 material has the intensity that increases flexible pipe, reduces cost, wear-resisting and ageing-resistant characteristics.
Described length direction with pipe 2 in the high molecular PTC electrically-heated-wire 6 of temperature controlling function is carried along urea liquid is laid, make urea solution delivery hose very convenient during fabrication, the metal aluminum foil layer 7 that is aided with simultaneously tight winding again, make the reflect heat of electrically-heated-wire generation and evenly be transmitted to urea liquid and carry interior pipe 2, can guarantee urea liquid is carried the even heating of the whole tube wall of interior pipe.And, high molecular PTC electrically-heated-wire 6 be with high molecular polymer as heat generating material, the flames of anger, fire-retardant; This heat generating material has from temperature controlling function, so-called " PTC " effect, positive temperature and resistance effect is promptly arranged, the phenomenon that the resistance that is meant heat generating material increases with the rising of temperature, therefore, it can adjust the electric heating output power automatically with variation of temperature, when temperature was higher than certain numerical value, its resistance trended towards infinity, and promptly output power is similar to zero, stop heating, thus prevent urea liquid carry in the solution Yin Wendu of pipe body and internal flow too high and the variation of performance and quality takes place.
The tube head of pipe connected the fast plug 1 of plastics in described urea liquid was carried, and was connected with other parts.Urea liquid is carried inner pipe joint position 10, the material (clay) that use has a heat conductive insulating is coated in the connection part of the aluminium foil 7 of joint and body outsourcing, (clay solidifies the back) encapsulates with the adhesive tape looping, thereby the heat of pipe body portion is incorporated into the plug position in urea liquid being carried, and makes the plug position also can obtain indirect heating.
Electrically-heated-wire 6 in the described electric heating urea pipe is drawn by lead, is connected with vehicle-mounted DC electrical source or is connected with the ECU (Electrical Control Unit) of SCR system by plug 4.
Claims (4)
1, a kind of direct current heating urea solution delivery hose, comprise pipe in the urea liquid conveying, it is characterized in that: the pipe outside fits tightly the high molecular PTC electrically-heated-wire that has from temperature controlling function in the transport urea solution, and draw by lead, be connected with control unit by connector assembly, realize urea liquid is carried the heating of interior pipe; Described high molecular PTC electrically-heated-wire is laid along the length direction of interior pipe, and the metal aluminum foil layer in the outside of pipe closely is wound with described high molecular PTC electrically-heated-wire also is contained in urea liquid is carried also is provided with insulation material layer outside described metal aluminum foil layer.
2, a kind of direct current heating urea solution delivery hose as claimed in claim 1, it is characterized in that outside described insulation material layer, being provided with have waterproof, antifrictional insulating protective layer.
3, a kind of direct current heating urea solution delivery hose as claimed in claim 1 is characterized in that the hose coupling position uses the material with heat conductive insulating to encapsulate.
4, a kind of direct current heating urea solution delivery hose as claimed in claim 1, it is characterized in that pipe comprises nylon skin and the internal layer that is made of ethylene-tetrafluoroethylene copolymer (ETFE) in the described urea liquid conveying, described internal layer and skin are combined as a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101534448A CN101666401B (en) | 2009-10-12 | 2009-10-12 | Direct current heating urea solution delivery hose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101534448A CN101666401B (en) | 2009-10-12 | 2009-10-12 | Direct current heating urea solution delivery hose |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101666401A true CN101666401A (en) | 2010-03-10 |
| CN101666401B CN101666401B (en) | 2012-07-11 |
Family
ID=41803135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101534448A Active CN101666401B (en) | 2009-10-12 | 2009-10-12 | Direct current heating urea solution delivery hose |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101666401B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105606642A (en) * | 2016-03-11 | 2016-05-25 | 东莞正扬电子机械有限公司 | Heat-conduction-type concentration detecting mechanism and urea-box liquid level sensor |
| CN107606372A (en) * | 2016-07-12 | 2018-01-19 | 致茂电子(苏州)有限公司 | The anti-condensation module of cry-fluid line |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101235931A (en) * | 2008-01-24 | 2008-08-06 | 华东理工大学 | Self-temperature controlling water-electricity dual-purpose composite pipes |
| CN101255935B (en) * | 2008-01-30 | 2010-06-09 | 程崇均 | Hydroelectricity dual-purpose composite tube as well as processing and installation method thereof |
| CN201273403Y (en) * | 2008-12-29 | 2009-07-15 | 浙江铁马汽车零部件有限公司 | Urea solution conveying hose |
-
2009
- 2009-10-12 CN CN2009101534448A patent/CN101666401B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105606642A (en) * | 2016-03-11 | 2016-05-25 | 东莞正扬电子机械有限公司 | Heat-conduction-type concentration detecting mechanism and urea-box liquid level sensor |
| CN107606372A (en) * | 2016-07-12 | 2018-01-19 | 致茂电子(苏州)有限公司 | The anti-condensation module of cry-fluid line |
| CN107606372B (en) * | 2016-07-12 | 2019-06-14 | 致茂电子(苏州)有限公司 | The anti-condensation module of cry-fluid line |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101666401B (en) | 2012-07-11 |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG TIEMA TECHNOLOGY CO., LTD. Free format text: FORMER NAME: ZHEJIANG IRON HORSE AUTO PARTS CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 317000 No. 288 Jiangnan Road, Linhai City, Zhejiang Province Patentee after: Iron Horse Technology Co., Ltd. Address before: 317000 No. 288 Jiangnan Road, Linhai City, Zhejiang Province Patentee before: Zhejiang Iron Horse Auto Parts Co., Ltd. |
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| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 317000 No. 288, Pioneer Road, Linhai City, Zhejiang Province Patentee after: Iron Horse Technology Co., Ltd. Address before: 317000 No. 288 Jiangnan Road, Linhai City, Zhejiang Province Patentee before: Iron Horse Technology Co., Ltd. |