CN207332999U - A kind of effective anti-flaming thermal-insulation structure of diesel exhaust gas - Google Patents
A kind of effective anti-flaming thermal-insulation structure of diesel exhaust gas Download PDFInfo
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- CN207332999U CN207332999U CN201721318780.XU CN201721318780U CN207332999U CN 207332999 U CN207332999 U CN 207332999U CN 201721318780 U CN201721318780 U CN 201721318780U CN 207332999 U CN207332999 U CN 207332999U
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Abstract
The utility model discloses a kind of effective anti-flaming thermal-insulation structure of diesel exhaust gas, the anti-flaming thermal-insulation structure is multi-layer compound structure and is coated on outside Diesel Engine Exhaust Pipe and fits closely, anti-flaming thermal-insulation structure is followed successively by heat radiation scattering layer, thermal insulation layer A, heat radiation reflecting layer, thermal insulation layer B and flame-retardant layer from outside to inside, and heat radiation scattering layer, thermal insulation layer A, heat radiation reflecting layer, thermal insulation layer B are connected with around flame-retardant layer using fire prevention sewing sewer；The thickness of heat radiation scattering layer is 0.01 ~ 2mm, and the thickness of thermal insulation layer A is 0.5 ~ 10mm, and the thickness of thermal insulation layer B is 0.5 ~ 10mm, and the thickness in heat radiation reflecting layer is 0.001 ~ 0.5mm, and fire-retardant layer thickness is 0.01 ~ 2mm；The effective anti-flaming thermal-insulation structure of diesel exhaust gas of the utility model has the characteristics that good heat-insulation effect, collet surface temperature are low, is unlikely to deform in high temperature environments, and installs simply, not easily to fall off, durable.
Description
Technical field
It the utility model is related to a kind of new structure of Diesel Engine Exhaust Pipe anti-flaming thermal-insulation technical field.
Background technology
As diesel engine acc power is constantly lifted, the heat discharged with the exhaust gas of engine discharge is also increasing,
Exhaust pipe in normal conditions its surface temperature up to 600-700 DEG C.At this stage in the bavin of many exhaust pipe outer cladding thermal insulation layers
In oil machine, initial phase surface temperature is coated often between 130-180 DEG C, but with the extension of usage time, simultaneously because diesel oil is sent out
For motivation at work there are low-frequency vibration, easily there is upper-thin-lower-thick after long-term use in traditional material, and thermal insulation layer locally occurs
There is phenomena such as gap in breakage, lower floor, and heat-proof quality constantly decays, and surface temperature can reach 300-400 DEG C of even more high.Environment
Temperature rises, the hot bright people of Tail Pipe Temperature, and the oil circuit pipeline adjacent with exhaust system can be because there is the shadow of so high temperature
Ring and there are security risk.
Heat transfer type has three kinds：Conduction heat transfer, convection current heat transfer, radiant heat transfer.In cold stage, heat exchange is to conduct heat
It is main, and in hot stage（Temperature >=400 DEG C）, radiant heat transfer will occupy an leading position, and air heat output increases with 4 powers of temperature
Long, with the rise of temperature, radiant heat transfer role is increasing.Therefore air outlet duct system is heat-insulated answers emphasis to consider isolation
The heat distributed by radiant heat transfer.
Utility model content
Technical problem to be solved in the utility model is to be directed to the heat-insulated effect of the effective heat insulation structural of existing diesel exhaust gas
Fruit is poor, and service life is short, with usage time extend anti-flaming thermal-insulation hydraulic performance decline the problem of, there is provided a kind of diesel exhaust gas is effective
New and effective anti-flaming thermal-insulation structure, has anti-flaming thermal-insulation performance strong, structure is novel, and corrosion resistance is strong, durable, easy for construction
Etc. characteristic.
In order to solve the above technical problems, the utility model uses following technical scheme：
A kind of effective anti-flaming thermal-insulation structure of diesel exhaust gas, the anti-flaming thermal-insulation structure is multi-layer compound structure and is coated on
Outside Diesel Engine Exhaust Pipe and fit closely, the anti-flaming thermal-insulation structure is followed successively by heat radiation scattering layer, thermal insulation layer from outside to inside
A, heat radiation reflecting layer, thermal insulation layer B and flame-retardant layer, the heat radiation scattering layer, thermal insulation layer A, heat radiation reflecting layer, thermal insulation layer B
Connected with around flame-retardant layer using fire prevention sewing sewer.
The thickness of the heat radiation scattering layer is 0.01 ~ 2mm.
The thickness of the thermal insulation layer A is 0.5 ~ 10mm, and the thickness of thermal insulation layer B is 0.5 ~ 10mm.
The thickness in the heat radiation reflecting layer is 0.001 ~ 0.5mm.
The fire-retardant layer thickness is 0.01 ~ 2mm.
The heat radiation scattering layer uses aluminium foil glass fiber fabric, and aluminum foil thickness is 5-20 μm in the aluminium foil glass fiber fabric, aluminium foil
（Metallic aluminium）Purity should be higher than that 90%；The glass-fiber-fabric used is combustion-proof glass fiber cloth；The heat radiation scattering layer uses aluminium foil
Glass-fiber-fabric can significantly improve corrosion resistance, simultaneously because aluminium foil glass fiber fabric cloth is fine and closely woven, veneer is more smooth well-pressed, and machinery is strong
Degree is big, and aluminium foil surface is not easy frictionally damage, so as to preferably play water vapor rejection function, long lifespan is easy for construction, and aluminium foil can be with
By thermal diffusion into surrounding environment, thermal insulation layer hull-skin temperature is reduced.
The thermal insulation layer A and thermal insulation layer B use high-temperature resistant nano hole aerogel heat-insulating felt, considerably increase anti-flaming thermal-insulation
The heat-proof quality of structure, in the high-temperature resistant nano hole aerogel heat-insulating felt base material used be glass mat, ceramic fibre
Felt, high silica fiber felt, basalt fibre felt, super glass wool fibrofelt, aramid fiber felt, oxidization fiber aramid fiber felt or
Quartz fiber felt；Nano-hole aerogel used is inorganic oxide aerogel, carbide aeroge, graphene aerogel or sulphur
Compounds of group aeroge.
The non-ignitable nano-hole aerogel heat-insulating felt of the high temperature resistant is Nomex, avoids material in supercritical drying process
The middle structural stability for destroying base material.
The heat radiation reflecting layer uses metal foil, and the metal foil is molybdenum foil, aluminium foil, stainless steel foil or copper foil, metal
Paper tinsel purity is more than 90%, and heat radiation reflecting layer is used for dropping low heat radiation, and wherein metal foil material can be according to specific technique
And construction requirement, addition one layer, two layers, three layers to multilayer unlike material, different-thickness, different layers of metal foil materials.
The flame-retardant layer uses flame retardant inorganic fiber cloth, and the flame retardant inorganic fiber cloth is glass fabric, high silica is fine
Wei Bu, basalt fiber cloth or quartz fiber cloth.
The fire prevention sewing thread is glass fibre fire prevention sewing thread.
The effective anti-flaming thermal-insulation structure of diesel exhaust gas of the utility model, has good heat-insulation effect, collet surface temperature
The features such as low.Long-time service is unlikely to deform in high temperature environments, and is installed simply, is occupied little space, not easily to fall off, prolonged resistance to
With.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model.
Embodiment
With reference to specific embodiment, the utility model is described further.It is to be understood that following embodiments are only used for
The scope that bright the utility model rather than limits the present invention, the person skilled in the art in the field can be according to above-mentioned practicality
New content makes some nonessential modifications and adaptations.
As shown in Figure 1, a kind of effective anti-flaming thermal-insulation structure of diesel exhaust gas, the anti-flaming thermal-insulation structure is MULTILAYER COMPOSITE knot
Structure and it is coated on outside Diesel Engine Exhaust Pipe and fits closely, the anti-flaming thermal-insulation structure is followed successively by heat radiation scattering from outside to inside
Layer 1, thermal insulation layer A2, heat radiation reflecting layer 3, thermal insulation layer B4 and flame-retardant layer 5, the heat radiation scattering layer, thermal insulation layer A, heat radiation
Reflecting layer, thermal insulation layer B are connected with around flame-retardant layer using fire prevention sewing sewer.
Preferably, the thickness of heat radiation scattering layer is 0.01 ~ 2mm, and heat radiation scattering layer uses aluminium foil glass fiber fabric, the aluminium
Aluminum foil thickness is 5-20 μm in paper tinsel glass-fiber-fabric, the aluminium foil of use（Metallic aluminium）Purity should be higher than that 90%；The glass-fiber-fabric used is fire-retardant
Glass-fiber-fabric；The heat radiation scattering layer significantly improves corrosion resistance using aluminium foil glass fiber fabric, simultaneously because aluminium foil glass fiber fabric
Cloth is fine and closely woven, and veneer is more smooth well-pressed, and mechanical strength is big, and aluminium foil surface is not easy frictionally damage, so as to preferably play steam resistance
Every function, long lifespan is easy for construction, and aluminium foil can reduce thermal insulation layer hull-skin temperature by thermal diffusion into surrounding environment.
Preferably, the thickness of the thermal insulation layer A is 0.1 ~ 10mm, and the thickness of thermal insulation layer B is 0.1 ~ 10mm；Thermal insulation layer A and
Thermal insulation layer B uses high-temperature resistant nano hole aerogel heat-insulating felt, considerably increases the heat-proof quality of anti-flaming thermal-insulation structure, described resistance to
Base material used is glass mat, ceramic fiber blanket, high silica fiber felt, basalt in the aerogel heat-insulating felt of high-temperature nano hole
Fibrofelt, super glass wool fibrofelt, aramid fiber felt, oxidization fiber aramid felt or quartz fiber felt；Nano-pore airsetting used
Glue is inorganic oxide aerogel, carbide aeroge, graphene aerogel or chalcogenide aeroge；It is furthermore preferred that institute
The high-temperature resistant nano hole aerogel heat-insulating felt stated is Nomex, avoids the knot that material destroys base material in supercritical drying process
Structure stability.
Preferably, the thickness in the heat radiation reflecting layer is 0.001 ~ 0.5mm, and heat radiation reflecting layer uses metal foil, institute
It is molybdenum foil, aluminium foil, stainless steel foil or copper foil to state metal foil, and for dropping low heat radiation, wherein metal foil material can basis
Specific construction requirement, addition one layer, two layers, three layers to multilayer unlike material, different-thickness, different layers of metal foil materials；
The metal foil purity should reach more than 90%.
Preferably, the fire-retardant layer thickness is 0.01 ~ 2mm, and flame-retardant layer uses flame retardant inorganic fiber cloth, flame retardant inorganic fiber
Cloth is glass fabric, high silica fiber cloth, basalt fiber cloth or quartz fiber cloth.
Preferably, the fire prevention sewing thread is glass fibre fire prevention sewing thread.
Hull-skin temperature is tested with different structure parcel exhaust pipe respectively, in use, being coated on exhaust pipe, seam
Locate overlapping, be then fixed with pipe thread or bandage, it is tightly wrapped up, ensure good heat insulation.Can be according to exhaust pipe
The thickness of required heat insulation layer selects the felt insulation and metal foil material of different thickness in monolayer, to ensure anti-flaming thermal-insulation after construction
Energy.Actual use process is tested, 580 DEG C of measurement exhaust pipe interior media temperature, when not wrapping up any structure, exhaust pipe
Hull-skin temperature is average at 298 DEG C；When wrapping up common thermal insulation layer, hull-skin temperature average value is at 260 DEG C；Use the utility model
Encapsulated by structures exhaust pipe after, test hull-skin temperature average value is 150 DEG C.It is possible thereby to prove：The diesel oil of the utility model
Machine exhaust pipe anti-flaming thermal-insulation structure, has the characteristics that good heat-insulation effect, collet surface temperature are low.The utility model is in high temperature
Long-time service is unlikely to deform under environment, and is installed simply, is occupied little space, not easily to fall off, durable.
The advantages of basic principle and main feature and the utility model of the utility model has been shown and described above.This
The technical staff of industry is retouched in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
That states simply illustrates the principle of the utility model, on the premise of not departing from the spirit and scope of the utility model, the utility model
Various changes and modifications are also had, these various changes and improvements fall within the scope of the claimed invention.This practicality is new
Type is claimed scope and is defined by the appending claims and its equivalent thereof.
Claims (5)
- A kind of 1. effective anti-flaming thermal-insulation structure of diesel exhaust gas, it is characterised in that：The anti-flaming thermal-insulation structure is MULTILAYER COMPOSITE knot Structure and it is coated on outside Diesel Engine Exhaust Pipe and fits closely, the anti-flaming thermal-insulation structure is followed successively by heat radiation scattering from outside to inside Layer（1）, thermal insulation layer A（2）, heat radiation reflecting layer（3）, thermal insulation layer B（4）And flame-retardant layer（5）, the heat radiation scattering layer（1）, every Thermosphere A（2）, heat radiation reflecting layer（3）, thermal insulation layer B（4）And flame-retardant layer（5）Around using fire prevention sewing sewer connection.
- 2. the effective anti-flaming thermal-insulation structure of diesel exhaust gas according to claim 1, it is characterised in that：The heat radiation scattering Layer（1）Thickness be 0.01 ~ 2mm.
- 3. the effective anti-flaming thermal-insulation structure of diesel exhaust gas according to claim 1, it is characterised in that：The thermal insulation layer A（2） Thickness be 0.5 ~ 10mm, thermal insulation layer B（4）Thickness be 0.5 ~ 10mm.
- 4. the effective anti-flaming thermal-insulation structure of diesel exhaust gas according to claim 1, it is characterised in that：The heat radiation reflection Layer（3）Thickness be 0.001 ~ 0.5mm.
- 5. the effective anti-flaming thermal-insulation structure of diesel exhaust gas according to claim 1, it is characterised in that：The flame-retardant layer（5） Thickness is 0.01 ~ 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721318780.XU CN207332999U (en) | 2017-10-13 | 2017-10-13 | A kind of effective anti-flaming thermal-insulation structure of diesel exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721318780.XU CN207332999U (en) | 2017-10-13 | 2017-10-13 | A kind of effective anti-flaming thermal-insulation structure of diesel exhaust gas |
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| CN207332999U true CN207332999U (en) | 2018-05-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109483960A (en) * | 2018-11-26 | 2019-03-19 | 深圳市骏鼎达新材料股份有限公司 | A kind of automobile exhaust pipe protective case and preparation method thereof |
| CN110509622A (en) * | 2019-09-27 | 2019-11-29 | 安徽华菱汽车有限公司 | A kind of heat insulating mattress |
-
2017
- 2017-10-13 CN CN201721318780.XU patent/CN207332999U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109483960A (en) * | 2018-11-26 | 2019-03-19 | 深圳市骏鼎达新材料股份有限公司 | A kind of automobile exhaust pipe protective case and preparation method thereof |
| CN110509622A (en) * | 2019-09-27 | 2019-11-29 | 安徽华菱汽车有限公司 | A kind of heat insulating mattress |
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