CN104033475B - A kind of flexible pipe being applicable to vehicle - Google Patents
A kind of flexible pipe being applicable to vehicle Download PDFInfo
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- CN104033475B CN104033475B CN201410242418.3A CN201410242418A CN104033475B CN 104033475 B CN104033475 B CN 104033475B CN 201410242418 A CN201410242418 A CN 201410242418A CN 104033475 B CN104033475 B CN 104033475B
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- pipe
- internal lining
- flexible pipe
- lining pipe
- vehicle
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Abstract
The present invention relates to a kind of flexible pipe being applicable to vehicle, including the crust arranged in hollow and the internal lining pipe being arranged on outer Intradermal, flat filament and steel wire floor it is sequentially provided with between internal lining pipe and crust, flat filament is co-axially located at internal lining pipe outer wall and tight internal lining pipe in the shape of a spiral, steel wire floor is co-axially located at flat filament outer wall, steel wire floor is made up of some steel bars being evenly distributed on flat filament outer wall, and steel wire floor fits tightly with crust inwall；Wherein, internal lining pipe is made up of ptfe composite, the high comprehensive performance such as coefficient of friction, heat stability and corrosion resistance.And flexible pipe is in use, flat filament can effectively prevent internal lining pipe from deforming, and steel wire floor can effectively prevent flexible pipe stretching or compression, prevents the deformation of flexible pipe further, improves the service life of flexible pipe.
Description
Technical field
The invention belongs to technical field of automobile parts, relate to a kind of being applicable to the soft of vehicle
Pipe.
Background technology
Automobile, as the walking-replacing tool of people, is one of main vehicles.Automobile has
Many is distributed in the parts in each orientation of vehicle body, because this type component is mostly rigidity
Material is made, and is arranged on different azimuth, so they are not suitable for being directly connected to pass
Dynamic, therefore flexible axle occurs in vehicle body the most at large.Clutch because of operating mechanism Yu automobile
Device be rigid structure and installation site farther out, so flexible axle is particularly suited for the manipulation of automobile
Mechanism and the connection of automobile clutch.
It is known that driver is as changed the speed of driving, it is necessary for being grasped by manipulation
Vertical pole swings and realizes, and steerable system has carried out the reciprocating stroke of both direction, the softest
Axle needs to carry the active force of both direction, i.e. thrust and pulling force.The quality of flexible axle is direct
Determine the gearshift performance of automobile.
Flexible axle includes mandrel and flexible pipe, and flexible pipe wraps up mandrel, and flexible pipe is the key of flexible axle
Position.In above-mentioned reciprocating stroke, the wearability of flexible pipe and be unlikely to deform be determine soft
One of axle life-span important key element.
In sum, needing design, a kind of wearability is good, on-deformable is applicable to vehicle
Flexible pipe.
Summary of the invention
It is an object of the invention to there are the problems referred to above for existing technology, it is proposed that a kind of
The wearability flexible pipe being applicable to vehicle good, on-deformable.
The purpose of the present invention can be realized by following technical proposal: one is applicable to vehicle
Flexible pipe, including the crust arranged in hollow and the internal lining pipe being arranged on outer Intradermal, institute
Stating and be sequentially provided with flat filament and steel wire floor between internal lining pipe and crust, described flat filament is coaxially disposed
At internal lining pipe outer wall and tight internal lining pipe in the shape of a spiral, described steel wire floor is coaxially disposed
At flat filament outer wall, described steel wire floor is made up of some steel bars being evenly distributed on flat filament outer wall,
Described steel wire floor fits tightly with crust inwall；Wherein, described internal lining pipe is by polytetrafluoroethyl-ne
Alkene composite is made, and described ptfe composite is by following parts by weight composition
Composition: polytetrafluoroethylsuspending suspending resin: 50-80 part, polyacrylonitrile fibre: 10-30 part,
Copper powder 8-3:10-20 part, rubber powder: 5-15 part, coupling agent: 0.5-3 part, antioxygen
Agent: 0.5-3 part.
Politef has extremely low coefficient of friction, excellent heat stability and corrosion-resistant
Property, it is the plastics of a kind of high comprehensive performance.But, pure politef mechanicalness
Energy is poor, linear expansion coefficient big, poor thermal conductivity, causes its wear extent big, thus is not suitable for
It is used alone as preparing the material of internal lining pipe.Because, if made with pure politef
When internal lining pipe produces friction with mandrel, owing to the cohesive energy of politef is little, intermolecular
Adhesion is weak, and the macromole of politef is easily drawn out crystalline region and transfers to mating plate
The transfer membrane that upper formation is thin, friction behavior enters between poly tetrafluoro ethylene matrix and transfer membrane
OK, so pure politef coefficient of friction is the lowest.Due to this layer of transfer membrane and to flour milling
Adhesion extreme difference, it is easy to come off, cause politef wear extent the highest.Therefore,
The present invention needs to carry out politef being blended to improve its wearability.Wherein, it is blended
Polyacrylonitrile fibre in thing can be effectively improved transfer membrane and the adhesion to flour milling, makes
Transfer membrane can intactly, be securely attached to difficult drop-off on flour milling, thus drop
Low wear extent.
And after blend copper powder 8-3 adds poly tetrafluoro ethylene matrix, it is effectively increased matrix
Intensity, increases bearing capacity, and after friction, copper powder 8-3 protrudes from friction surface, due to copper
The heat conductivity that powder 8-3 is good, politef will not be caused melting phenomenon by frictional heat,
Thus also play the effect reducing wear extent.On the other hand, copper powder 8-3 can also promote
Enter ptfe composite and form transfer membrane at dual face, and owing to matrix containing
Polyacrylonitrile fibre, transfer membrane can intactly, be securely attached to on flour milling not
Easy to fall off, thus reduce coefficient of friction, improve the resistance to of ptfe composite
Mill property.Therefore may certify that, after blended copper powder 8-3 and polyacrylonitrile fibre, have
Effect improves the shortcoming that the wear extent of politef is higher.
Additionally, the present invention is also added into rubber powder, idol in ptfe composite
Connection agent and antioxidant.Owing to flexible pipe needs bear thrust and pulling force and move back and forth,
So not only wearability determines the service life of flexible pipe, its toughness is the most extremely important.Grind
Study carefully and show, poly tetrafluoro ethylene matrix of the present invention adds the toughener rubber in above-mentioned scope
After rubber powder, its impact flexibility improves more than 30%.And the addition of coupling agent is mainly
Can well combine between ptfe composite, described coupling agent is
One or more in commercially available common coupling agent, such as: silane coupler, titanate esters coupling
Agent, aluminate coupling agent, phosphate coupling agent.The addition of antioxidant is primarily to press down
The oxygen in the air processed oxygenolysis to composite, improves material of the present invention and exists
The reservation of physical property after heating in aerobic air.Described antioxidant is also commercially available common anti-
One or more in oxygen agent, such as: antioxidant B215, antioxidant B225, anti-
Oxidant 1010, antioxidant 1076.
Above-mentioned a kind of be applicable to the flexible pipe of vehicle, described copper powder 8-3 and rubber powder
Particle diameter be 40-200 mesh.The size of blend particle diameter also influences whether the property of internal lining pipe
Can, by the size controlling of copper powder 8-3 and rubber powder within the above range, it can be uniformly dispersed
In poly tetrafluoro ethylene matrix, play the effect improving wearability and toughness.
Above-mentioned a kind of be applicable to the flexible pipe of vehicle, the preparation method of described internal lining pipe
Comprise the following steps:
S1, claim by constituent and the parts by weight thereof of above-mentioned ptfe composite
Take raw material, and add extrusion aid mix homogeneously；
S2, the compound of above-mentioned ptfe composite is carried out blank preforming and
Raw pipe forming processes, blank preforming pressure is 0.7-3.0MPa, and compression speed is
45-55mm/min, the dwell time is 1-5min, and the material cavity temperature of raw pipe molding is 30-50
DEG C, die temperature is 50-60 DEG C；
S3, above-mentioned prepared raw pipe it is dried in sintering furnace and sinters, being dried temperature
Degree is for 100-210 DEG C, and drying time is 2-3h, and sintering temperature is 350-370 DEG C, insulation
Time 3-4h；
S4, by the raw pipe furnace cooling after above-mentioned sintering to 310-320 DEG C time, take out throw
Enter and cold water carries out Quenching Treatment, obtain internal lining pipe.
Above-mentioned a kind of be applicable to the flexible pipe of vehicle, the preparation method of described internal lining pipe
In middle step S1, mixing temperature is not higher than 19 DEG C, and time 15-25min, after mix homogeneously
24-30h is deposited at 20-30 DEG C.Politef crystal has a crystal formation when 19 DEG C
Transition point, when less than 19 DEG C, politef crystal is Rhizoma Sparganii build, at this moment spiral
In macromole, every 13 carbon atoms reverse 180 DEG C, and its axial spacing is 16.9 × 10-10m；
Being hexahedro build when higher than 19 DEG C, every 15 carbon atoms reverse 180 DEG C, axial spacing
19.5×10-10m.This crystal conversion can cause the ratio of polymer to have the change of 1%.
On the other hand, politef also has fibre forming property, and it is resin under the effect of orientation force
Can form the screen net structure with some strength between granule, this fibre forming property only allows out
In the most raw pipe forming process, and the fibrosis during batch mixing can cause resin conglomeration,
And conglomeration material is difficult to fibrosis again when raw pipe molding, cause internal lining pipe can produce space
And cracking.So, mixture temperature is not above 19 DEG C.At 20-30 DEG C after mix homogeneously
Under deposit 24-30h during need to carry out the ripening of necessity to ensure goods in
The quality of bushing pipe, ripening is conventional ripening mode.
Further, since polyflon easily sticking to mould, unlubricated property, resistance are big,
It is difficult to be biased out internal lining pipe.So being accomplished by adding extrusion aid during batch mixing, play
Certain lubrication, reduces the friction between resin and resin, between resin and mould
Resistance, in order to after clipped power effect, makes spherical resin particle stretch uniformly fiber
Shape structure.And the extrusion aid added does not needs only have good lubricity, readily permeable
In resin, and any chemical change can not occur in forming process, less than burning
Can all escape during junction temperature, after effusion, goods internal lining pipe is internal and surface is not left completely
Any affect outward appearance, reduce product properties residue.Therefore, described extrusion aid is preferred
The Isopar solvent in conditions above extrusion aid, VM&P Petroleum, 200# can be met molten
One or more in agent oil.
Above-mentioned a kind of be applicable to the flexible pipe of vehicle, the preparation method of described internal lining pipe
Middle step S3 sinters heating rate control at 50-60 DEG C/h.Politef crystal exists
Melt when 327 DEG C.More than this temperature, the crystal structure of crystal disappears, and is changed into
Bright amorphous gel state, and it is attended by the sharp increase of specific volume about 25%, so needing control
Heating rate processed is to avoid very fast intensification.
By the degree of crystallinity of the internal lining pipe after sintering about about 75%, want prepared anti-
The internal lining pipe that bending property is excellent, it is necessary to degree of crystallinity is reduced to about 50%, so,
Need to carry out Quenching Treatment.Although the temperature that politef starts to melt is about 327
DEG C, but in cooling procedure, its crystallization rate peak value, but between 310-320 DEG C, enters
During row quenching, the coolant-temperature gage that enters of internal lining pipe should be made to try one's best close to crystallization rate peak value from high temperature
And as early as possible by this humidity province, crystallization rate peak value place, to obtain alap knot
Crystalline substance degree and the least stress cracking.
Above-mentioned a kind of be applicable to the flexible pipe of vehicle, described flat filament is that flat-shaped sets
Put and be made up of stainless steel material.Stainless steel material hardness, rigidity, intensity are higher, this
Body is unlikely to deform, the flat filament tight internal lining pipe made with rustless steel, can effectively prevent
Internal lining pipe deforms.
Above-mentioned a kind of be applicable to the flexible pipe of vehicle, outside adjacent two sections of described flat filament
Sidewall fits tightly.
Above-mentioned a kind of be applicable to the flexible pipe of vehicle, adjacent two interradicular spaces of described steel bar
It is zero.
Compared with prior art, the following beneficial effect of the present invention:
1, present invention internal lining pipe be applicable to the flexible pipe of vehicle uses politef to be combined
Material is made, the high comprehensive performance such as coefficient of friction, heat stability and corrosion resistance, and
Polyacrylonitrile fibre, copper powder 8-3 being blended to reduce its wear extent, blended rubber powder carries
High tenacity, makes the high comprehensive performances such as final prepared internal lining pipe wearability, toughness, carries
The service life of high flexible pipe.
2, in the preparation process of internal lining pipe of the present invention, batch mixing, blank preformation are strictly controlled
Type, raw pipe molding, the dry and process conditions of sintering, and carry out after sintering at quenching
Reason, to ensure the quality of the internal lining pipe obtained, thus ensures the quality of flexible pipe and uses the longevity
Life.
3, when flexible pipe uses, flat filament can effectively prevent internal lining pipe from deforming.
4, flexible pipe is in use, it will bear pulling force and thrust, and steel wire floor can be effective
Prevent flexible pipe stretching or compression, prevent the deformation of flexible pipe further, improve flexible pipe
Service life.
Accompanying drawing explanation
Fig. 1 is the structural representation of a preferred embodiment of the present invention.
Fig. 2 is the cross sectional representation of a preferred embodiment of the present invention.
In figure, 10, crust；20, internal lining pipe；30, flat filament；50, steel wire floor；51、
Steel bar.
Detailed description of the invention
The following is the specific embodiment of the present invention and combine accompanying drawing, the technical side to the present invention
Case is further described, but the present invention is not limited to these embodiments.
As depicted in figs. 1 and 2, the present invention is applicable to the flexible pipe of vehicle and includes setting in hollow
The crust 10 put and the internal lining pipe 20 being arranged in crust 10, described internal lining pipe 20
And between crust 10, it being sequentially provided with flat filament 30 and steel wire floor 50, described flat filament 30 is coaxial
It is arranged on internal lining pipe 20 outer wall and tight internal lining pipe 20, described steel wire in the shape of a spiral
Layer 50 is co-axially located at flat filament 30 outer wall, and described steel wire floor 50 is uniformly distributed by some
Steel bar 51 at flat filament 30 outer wall is constituted, described steel wire floor 50 and crust 10 inwall
Fit tightly.
Preferably, flexible pipe is in use, it will bear pulling force and thrust, and steel wire floor 50
Can effectively prevent flexible pipe stretching or compression, prevent the deformation of flexible pipe further, improve
Service life of flexible pipe.
Preferably, internal lining pipe 20 is made up of ptfe composite, described polytetrafluoro
Ethylene composite is become to be grouped into by following parts by weight: polytetrafluoroethylsuspending suspending resin:
50-80 part, polyacrylonitrile fibre: 10-30 part, copper powder 8-3:10-20 part, rubber powder:
5-15 part, coupling agent: 0.5-3 part, antioxidant: 0.5-3 part.On internal lining pipe 20 uses
State ptfe composite and make the wearability that can increase internal lining pipe 20, internal lining pipe
20 directly contact with mandrel, and internal lining pipe 20 will produce friction with mandrel, internal lining pipe 20
Anti-wear performance directly affects the life-span of flexible pipe, adds wearability and directly increases flexible pipe
Service life.
Preferably, flat filament 30 arranges in flat-shaped and is made up of stainless steel material, prevents
Inside hose deforms, and saves material simultaneously.
It is further preferred that the lateral wall of adjacent two sections of flat filament 30 fits tightly so that flat
Silk 30 cladding internal lining pipe 20 completely, can effectively prevent internal lining pipe 20 from deforming.
Preferably, adjacent two interradicular spaces of steel bar 51 are zero, and steel bar 51 is distributed tightr,
Without relative motion between steel bar 51, steel wire floor 50 is more firm, can effectively prevent flexible pipe
Deformation.
Table 1: the constituent of embodiment of the present invention 1-4 internal lining pipe and parts by weight thereof
Embodiment 1:
Raw material is weighed by constituent and the parts by weight thereof of embodiment 1 internal lining pipe in table 1,
And adding extrusion aid Isopar solvent mix homogeneously, mixing temperature is not higher than 19 DEG C, mixing
Time is 15min, deposits 30h after mix homogeneously at 20 DEG C, carries out during depositing
Necessary ripening.Then compound is carried out blank preforming process, blank preformation
Type pressure is 0.7MPa, and compression speed is 45mm/min, and the dwell time is 1min.In advance
Carrying out giving birth to pipe forming processes after molding, controlling material cavity temperature is 30 DEG C, and die temperature is 50
℃.Being dried in sintering furnace and sinter after preparing raw pipe, baking temperature is 100-210
DEG C, drying time is 3h, and sintering temperature is 350-355 DEG C, and heating rate controls
50 DEG C/h, and temperature retention time 3h.When raw pipe furnace cooling after sintering is to 310 DEG C, take
Go out to put in cold water and carry out Quenching Treatment, obtain internal lining pipe.
Embodiment 2:
Raw material is weighed by constituent and the parts by weight thereof of embodiment 2 internal lining pipe in table 1,
And add extrusion aid VM&P Petroleum mix homogeneously, mixing temperature is not higher than 19 DEG C,
Incorporation time is 18min, deposits 28h, during depositing after mix homogeneously at 24 DEG C
Carry out the ripening of necessity.Then compound is carried out blank preforming process, blank
Preforming pressure is 1.5MPa, and compression speed is 48mm/min, and the dwell time is 2min.
Carrying out giving birth to pipe forming processes after preforming, controlling material cavity temperature is 35 DEG C, and die temperature is
54℃.Being dried in sintering furnace and sinter after preparing raw pipe, baking temperature is
100-210 DEG C, drying time is 3h, and sintering temperature is 355-360 DEG C, heating rate control
System is at 55 DEG C/h, and temperature retention time 4h.When raw pipe furnace cooling after sintering is to 315 DEG C,
Take out to put in cold water and carry out Quenching Treatment, obtain internal lining pipe.
Embodiment 3:
Raw material is weighed by constituent and the parts by weight thereof of embodiment 3 internal lining pipe in table 1,
And add extrusion aid 200#Solvent naphtha mix homogeneously, mixing temperature is not higher than 19 DEG C, mixing
Time is 20min, deposits 26h after mix homogeneously at 28 DEG C, carries out during depositing
Necessary ripening.Then compound is carried out blank preforming process, blank preformation
Type pressure is 2MPa, and compression speed is 50mm/min, and the dwell time is 3min.Preformation
Carrying out giving birth to pipe forming processes after type, controlling material cavity temperature is 45 DEG C, and die temperature is 56
℃.Being dried in sintering furnace and sinter after preparing raw pipe, baking temperature is 100-210
DEG C, drying time is 3h, and sintering temperature is 360-365 DEG C, and heating rate controls
58 DEG C/h, in order to avoid very fast intensification, and temperature retention time 3h.Raw pipe furnace cooling after sintering
During to 318 DEG C, take out in input cold water and carry out Quenching Treatment, obtain internal lining pipe.
Embodiment 4:
Raw material is weighed by constituent and the parts by weight thereof of embodiment 4 internal lining pipe in table 1,
And add extrusion aid 200#Solvent naphtha mix homogeneously, mixing temperature is not higher than 19 DEG C, mixing
Time is 25min, deposits 24h after mix homogeneously at 30 DEG C, carries out during depositing
Necessary ripening.Then compound is carried out blank preforming process, blank preformation
Type pressure is 3.0MPa, and compression speed is 55mm/min, and the dwell time is 5min.In advance
Carrying out giving birth to pipe forming processes after molding, controlling material cavity temperature is 50 DEG C, and die temperature is 60
℃.Being dried in sintering furnace and sinter after preparing raw pipe, baking temperature is 100-210
DEG C, drying time is 2h, and sintering temperature is 365-370 DEG C, and heating rate controls
60 DEG C/h, in order to avoid very fast intensification, and temperature retention time 3h.Raw pipe furnace cooling after sintering
During to 320 DEG C, take out in input cold water and carry out Quenching Treatment, obtain internal lining pipe.
Comparative example 1:
Pure politef mixing extrusion aid is made liner by the preparation method of embodiment 1
Pipe.
The internal lining pipe that embodiment of the present invention 1-4 and comparative example 1 prepare is carried out performance test,
Test result is as shown in table 2.
Table 2: the internal lining pipe that embodiment of the present invention 1-4 and comparative example 1 prepare
The performance test results
As known from Table 2, the present invention uses embodiment 1-4 ptfe composite system
Its intensity of internal lining pipe, bending modulus, toughness, coefficient of friction and the wear extenies etc. become are comprehensive
Performance is superior to the comprehensive of the internal lining pipe that comparative example 1 uses pure politef to make
Can, therefore may certify that, the ptfe composite after present invention blending and modifying
The internal lining pipe performance improvement made is relatively big, improves the service life of internal lining pipe.
Application Example:
The internal lining pipe prepared in embodiment of the present invention 1-4 is applied to the present invention and is applicable to car
Flexible pipe in.
Comparative example 1:
Commercially available common vehicle hose.
The flexible pipe the being applicable to vehicle present invention prepared and the vehicle hose of comparative example are carried out
Performance test, wherein, bendability is tested under conditions of bending 180 °, weatherability
Testing under the conditions of-40 DEG C～120 DEG C, test result is as shown in table 3.
Table 3: vehicle hose that the present invention makes and the vehicle hose of comparative example
The performance test results
As known from Table 3, arrange by present configuration and internal lining pipe uses polytetrafluoroethyl-ne of the present invention
What alkene composite was made is applicable to the flexible pipe of vehicle and the commercially available common in-vehicle of comparative example with soft
The pipe apparent mass that compares is preferable, and the present invention is applicable to the flexible pipe of vehicle in use
Can effectively prevent deformation, improve service life, reduce replacement frequency, save maintenance expense
With.
Specific embodiment described herein is only to present invention spirit theory for example
Bright.Those skilled in the art can be to described specific embodiment
Make various amendment or supplement or use similar mode to substitute, but without departing from
The spirit of the present invention or surmount scope defined in appended claims.
Claims (8)
1. it is applicable to a flexible pipe for vehicle, including the crust arranged in hollow and outside being arranged on
The internal lining pipe of Intradermal, it is characterised in that be sequentially provided with between described internal lining pipe and crust flat filament and
Steel wire floor, described flat filament is co-axially located at internal lining pipe outer wall and tight liner in the shape of a spiral
Pipe, described steel wire floor is co-axially located at flat filament outer wall, and described steel wire floor is evenly distributed on by some
The steel bar of flat filament outer wall is constituted, and described steel wire floor fits tightly with crust inwall；Wherein, described
Internal lining pipe is made up of ptfe composite, and described ptfe composite is by following
Parts by weight become to be grouped into: polytetrafluoroethylsuspending suspending resin: 50-80 part, polyacrylonitrile fibre:
10-30 part, copper powder 8-3:10-20 part, rubber powder: 5-15 part, coupling agent: 0.5-3 part,
Antioxidant: 0.5-3 part.
A kind of flexible pipe being applicable to vehicle the most according to claim 1, it is characterised in that
The particle diameter of described copper powder 8-3 and rubber powder is 40-200 mesh.
A kind of flexible pipe being applicable to vehicle the most according to claim 1, it is characterised in that
The preparation method of described internal lining pipe comprises the following steps:
S1, the constituent of ptfe composite as described in claim 1 and weight thereof
Amount number weighs raw material, and adds extrusion aid mix homogeneously；
S2, the compound of above-mentioned ptfe composite is carried out blank preforming and raw pipe
Forming processes, blank preforming pressure is 0.7-3.0MPa, and compression speed is 45-55mm/min,
Dwell time is 1-5min, and the material cavity temperature of raw pipe molding is 30-50 DEG C, and die temperature is
50-60℃；
S3, prepared raw pipe being dried in sintering furnace and sintered, baking temperature is
100-210 DEG C, drying time is 2-3h, and sintering temperature is 350-370 DEG C, temperature retention time 3-4h；
S4, will sintering after raw pipe furnace cooling to 310-320 DEG C time, taking-up input cold water in
Carry out Quenching Treatment, obtain internal lining pipe.
A kind of flexible pipe being applicable to vehicle the most according to claim 3, it is characterised in that
In the preparation method of described internal lining pipe, in step S1, mixing temperature is not higher than 19 DEG C, the time
15-25min, deposits 24-30h after mix homogeneously at 20-30 DEG C.
A kind of flexible pipe being applicable to vehicle the most according to claim 3, it is characterised in that
The preparation method of described internal lining pipe sinters in step S3 heating rate control at 50-60 DEG C/h.
A kind of flexible pipe being applicable to vehicle the most according to claim 1, it is characterised in that
Described flat filament is that flat-shaped arranges and is made up of stainless steel material.
A kind of flexible pipe being applicable to vehicle the most according to claim 1, it is characterised in that
The lateral wall that described flat filament is adjacent two sections fits tightly.
A kind of flexible pipe being applicable to vehicle the most according to claim 1, it is characterised in that
Adjacent two interradicular spaces of described steel bar are zero.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410242418.3A CN104033475B (en) | 2014-05-30 | 2014-05-30 | A kind of flexible pipe being applicable to vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410242418.3A CN104033475B (en) | 2014-05-30 | 2014-05-30 | A kind of flexible pipe being applicable to vehicle |
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| CN104033475B true CN104033475B (en) | 2016-08-17 |
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| CN105922714A (en) * | 2016-06-06 | 2016-09-07 | 苏州捷宁模塑有限公司 | Fluoroplastic lining finished-product processing technique applied to chemical pipeline |
| CN105965923A (en) * | 2016-06-06 | 2016-09-28 | 苏州捷宁模塑有限公司 | Processing process for polytetrafluoroethylene steel wire composite pipe |
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| JPH0710928B2 (en) * | 1988-11-14 | 1995-02-08 | 横浜ゴム株式会社 | Rubber composition and fiber composite and hose |
| CN1088294A (en) * | 1992-12-18 | 1994-06-22 | 樊式宏 | Multi-layer flexible pipe and manufacturing process |
| CN102678732A (en) * | 2012-05-07 | 2012-09-19 | 上海蓝恩控制系统有限公司 | Inhaul cable sleeve for automobile |
| CN203510810U (en) * | 2013-07-17 | 2014-04-02 | 芜湖亚利华汽车部件有限公司 | Improved flexible shaft protecting bush |
| CN103557225A (en) * | 2013-09-11 | 2014-02-05 | 温芫鋐 | Bicycle lead casing |
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