CN218326642U - Low-permeability fuel pipe - Google Patents
Low-permeability fuel pipe Download PDFInfo
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- CN218326642U CN218326642U CN202220495599.0U CN202220495599U CN218326642U CN 218326642 U CN218326642 U CN 218326642U CN 202220495599 U CN202220495599 U CN 202220495599U CN 218326642 U CN218326642 U CN 218326642U
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Abstract
The utility model discloses a hyposmosis fires oil pipe belongs to pipe fitting technical field. A hyposmosis fires oil pipe has multilayer structure, by outer and interior contain in proper order: the pipe comprises an outer pipe wall layer, an outer bonding layer, a low-precipitation low-permeability layer, an inner bonding layer and an inner pipe wall layer; the outer pipe wall layer, the outer bonding layer, the low-precipitation low-permeability layer, the inner bonding layer and the inner pipe wall layer are sequentially connected; the outer pipe wall layer and the inner pipe wall layer are both made of polyphthalamide; the low-precipitation low-permeability layer is made of polyvinylidene fluoride material; the outer bonding layer and the inner bonding layer are both made of polyolefin materials. The utility model discloses a fuel pipe have low appear and high resistant separates the nature.
Description
Technical Field
The invention belongs to the technical field of pipe fittings, and particularly relates to an improved low-permeability fuel/fuel steam delivery pipeline.
Background
Most of the existing oil delivery pipes for passenger vehicles are single-layer or multi-layer polymer pipes, the pipe wall structural strength, the impact resistance, the corrosion resistance, the permeation resistance, the high and low temperature resistance, the low precipitation and other capabilities cannot meet the requirements of the existing high-performance vehicles, the oil delivery pipes are easy to deform when encountering objects such as stones and the like, the oil delivery pipes are easy to age under the condition of high and low temperature alternative use due to seasons or long-time running of an engine, the oil delivery pipes cannot effectively prevent permeation of fuel oil and evaporants thereof, the higher permeability resistance international standard requirements are difficult to achieve, environmental pollution is easy to cause due to permeation and volatilization of the fuel oil and the evaporants thereof, the service life of pipe bodies is shorter, and the integral service performance of the vehicles is not easy to improve. Although EVOH is used for effective blocking of the multilayer pipe, EVOH materials are special, the EVOH material is very easy to degrade in the processing process of the material due to low processing temperature when being matched with other materials for co-extrusion, mechanical performance is reduced, meanwhile, the inner layer of the pipe is directly contacted with fuel, a plurality of oligomers and plasticizers are separated out, pipelines are blocked due to increase of precipitates, and fuel supply is affected.
The prior art, chinese invention patent, application number: CN201911037006.5, publication No.: CN110686129A discloses a composite oil conveying pipe, which adopts the technical scheme as follows: "a compound defeated oil pipe, from inside to outside including oleophobic conducting layer, barrier layer and wearing layer, it is organic fluorine resin layer to oleophobic conducting layer, and organic fluorine resin layer covers the one deck base member towards defeated oil pipe pipeline inside department, and base material is the non-woven fabrics, and it dopes wire or non-metal conducting material to oleophobic conducting layer, and the barrier layer material is the THV fluoroplastics, and the wearing layer is ultra high molecular weight polyethylene layer or glass fiber layer, and the wearing layer surface scribbles PVC PU coating outward.
However, the above patents have the following problems:
the low precipitation performance and the barrier performance of the fuel pipe are low, and the requirements of the latest national six-emission standard regulation cannot be met.
Disclosure of Invention
1. Problems to be solved
Aiming at the problems in the prior art, the invention provides a five-layer composite fuel pipe which has the characteristics of low permeability, impact resistance, corrosion resistance, permeation resistance, strong high and low temperature alternation resistance, low cost and no oligomer precipitation.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A low-permeability fuel pipe has a multilayer structure and comprises an outer pipe wall layer, an outer bonding layer, a low-precipitation low-permeability layer, an inner bonding layer and an innermost inner pipe wall layer from outside to inside;
the outer pipe wall layer, the outer bonding layer, the low-precipitation low-permeability layer, the inner bonding layer and the inner pipe wall layer are sequentially connected;
the outer pipe wall layer and the inner pipe wall layer are both made of polyphthalamide;
the low-precipitation low-permeability layer is made of polyvinylidene fluoride material;
the outer bonding layer and the inner bonding layer are both made of polyolefin materials.
In the low-permeation fuel pipe described above,
the outer pipe wall layer and the low-precipitation low-permeability layer are bonded through an outer bonding layer.
In the low-permeation fuel pipe described above,
the inner pipe wall layer and the low-precipitation low-permeability layer are bonded through an inner bonding layer.
In the low-permeation fuel pipe described above,
the inner bonding layer is made of PA 612.
In the low-permeation fuel pipe described above,
the thickness of the wall layer of the outer pipe is 0.3mm-0.5mm; outer cover
The thickness of the bonding layer is 0.05mm-0.15mm. On the upper part
In the low-permeability fuel pipe, the fuel pipe,
the thickness of the low-precipitation and low-permeability layer is 0.1mm-0.2mm;
the thickness of the inner bonding layer is 0.05mm-0.15mm;
the thickness of the inner pipe wall layer is 0.1mm-0.5mm.
In the low-permeation fuel pipe described above,
the inner pipe wall layer is made of ETFE, and the thickness of the inner pipe wall layer is 0.2mm;
the thickness of the outer bonding layer is 0.15mm;
the low-precipitation and low-permeability layer is made of EVOH, and the thickness of the low-precipitation and low-permeability layer is 0.1mm;
the thickness of the inner bonding layer is 0.15mm;
the inner pipe wall layer is made of nylon 12 and has a thickness of 0.4mm.
In the low-permeation fuel pipe described above,
the inner pipe wall layer is made of PPA, and the thickness of the inner pipe wall layer is 0.2mm;
the thickness of the outer bonding layer is 0.15mm;
the low-precipitation and low-permeability layer is made of PVDF, and the thickness of the low-precipitation and low-permeability layer is 0.1mm;
the thickness of the inner bonding layer is 0.15mm;
the thickness of the inner pipe wall layer was 0.4mm.
3. Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
in the invention, the pipe wall layer adopts a composite layer structure, the inner and outer bonding layers are made of PPA resin with long-term high temperature resistance and excellent chemical resistance, and the PPA material with high HDT temperature and high flexural modulus solves the defects of poor permeability and poor high temperature resistance in the prior art; the middle low-precipitation low-permeability layer 300 is a polyvinylidene fluoride (PVDF) material which has good chemical corrosion resistance, oxidation resistance, weather resistance and ray radiation resistance, and has special properties such as piezoelectricity, dielectricity and pyroelectricity. In addition, the inner bonding layer 400 is made of low-precipitation PA612 material, so that the requirement of an oil tank factory on soluble precipitates is less than 6g/m 2 Insoluble extraction is less than 0.7g/m 2 The requirement is that the inner layer and the outer layer are made of polyphthalamide materials, the high temperature resistance can reach 135 ℃, and the polyphthalamide composite material has the advantages of high temperature resistanceThe cost is low, so the whole price of the product can be reduced through the reasonable combination of the raw materials of all layers of the pipe wall, and the product is easy to produce through extrusion and other modes, so the production cost is also low. When the oil pipe is used as an oil conveying pipe of a vehicle, the overall service performance of the vehicle can be enhanced and improved; besides being used as a liquid delivery pipeline, the fuel vapor pipe can also be used as a fuel vapor pipe of other vehicles.
Drawings
FIG. 1 is a block diagram of a low permeation fuel pipe of the present invention.
In the figure:
100. an outer pipe wall layer; 200. an outer tie layer; 300. a low-precipitation and low-permeability layer; 400. an inner tie layer; 500. an inner pipe wall layer.
Detailed Description
The invention is further described with reference to specific examples.
Example 1
As shown in fig. 1, the low-permeation fuel pipe of the present embodiment has a multi-layer structure, and sequentially includes, from outside to inside, an outer pipe wall layer 100, an outer adhesive layer 200, a low-precipitation low-permeation layer 300, an inner adhesive layer 400, and an inner pipe wall layer 500;
the outer pipe wall layer 100, the outer bonding layer 200, the low-precipitation low-permeability layer 300, the inner bonding layer 400 and the inner pipe wall layer 500 are sequentially connected;
the outer pipe wall layer 100 and the inner pipe wall layer 500 are both made of polyphthalamide; is low in
The precipitated low permeability layer 300 is made of polyvinylidene fluoride material;
the outer bonding layer 200 and the inner bonding layer 400 are made of polyolefin materials.
For better application to production, the following details are designed:
in the low-permeation fuel pipe described above,
the outer pipe wall layer 100 is bonded to the low-precipitation low-permeation layer 300 by an outer bonding layer 200.
Above-mentioned design satisfies the outer pipe wall layer 100 and hangs down to appear and fall the bonding demand between the low permeable formation 300, avoids appearing droing, reduces the product quality, and then can effectively improve the excellent ability of hindering to ooze of pipe-line system for the fuel permeability accords with the emission standard of six countries.
In the low-permeation fuel pipe described above,
the inner pipe wall layer 500 is bonded to the low-precipitation low-permeation layer 300 by an inner bonding layer 400.
Above-mentioned design satisfies the bonding demand between inner pipe wall layer 500 and the low permeable formation 300 of appearing, improves inner pipe wall layer 50 0's life, and then physical characteristics such as the intensity of reinforcing oil pipe and wearability.
In the low-permeation fuel pipe described above,
the inner tie layer 400 is made of PA 612.
The specific analysis is as follows:
in the invention, the pipe wall layer adopts a composite layer structure, the inner and outer bonding layers are made of PPA resin with long-term high temperature resistance and excellent chemical resistance, and the PPA material with high HDT temperature and high flexural modulus solves the defects of poor permeability and poor high temperature resistance in the prior art; the middle low-precipitation low-permeability layer 300 is a polyvinylidene fluoride (PVDF) material which has good chemical corrosion resistance, oxidation resistance, weather resistance and ray radiation resistance, and has special properties such as piezoelectricity, dielectricity and pyroelectricity. In addition, the inner bonding layer 400 is made of low-precipitation PA612 material, so that the requirement of an oil tank factory on soluble precipitates is less than 6g/m 2 Insoluble out of less than 0.7g/m 2 The requirements of the method are that the inner layer and the outer layer are made of polyphthalamide materials, the high temperature resistance can reach 135 ℃, the cost is low, the overall price of the product can be reduced through reasonable combination of raw materials of all layers of the pipe wall, the product is easy to produce through extrusion and other modes, and the method has the remarkable characteristic of low production cost. When the oil pipe is used as an oil conveying pipe of a vehicle, the overall service performance of the vehicle can be enhanced and improved; besides being used as a liquid delivery pipeline, the fuel vapor pipe can also be used as a fuel vapor pipe of other vehicles.
For the description of the thickness of the low permeation fuel pipe,
the thickness of the outer wall layer 100 is 0.3mm to 0.5mm; outer cover
The thickness of the bonding layer 200 is 0.05mm-0.15mm; at the same time, the user can select the desired position,
the thickness of the low-precipitation low-permeability layer 300 is 0.1mm-0.2mm;
the thickness of the inner bonding layer 400 is 0.05mm-0.15mm;
the inner pipe wall layer 500 has a thickness of 0.1mm to 0.5mm.
In practical application, the parameters are selected as follows:
the inner pipe wall layer 500 is made of ETFE, and the thickness thereof is 0.2mm;
the thickness of the outer bonding layer 200 is 0.15mm;
the low-precipitation low-permeability layer 200 is made of EVOH and has the thickness of 0.1mm; inner part
The thickness of the adhesive layer 400 is 0.15mm;
the inner pipe wall layer 500 is made of nylon 12 and has a thickness of 0.4mm.
Further, alternative parameter choices are as follows:
the inner pipe wall layer 500 is made of PPA and has a thickness of 0.2mm; outer cover
The thickness of the adhesive layer 200 is 0.15mm;
the low-precipitation low-permeability layer 200 is made of PVDF, and the thickness of the low-precipitation low-permeability layer is 0.1mm;
the thickness of the inner adhesive layer 400 is 0.15mm;
the thickness of the inner pipe wall layer 500 is 0.4mm.
The design has the advantages of chemical corrosion resistance, creep resistance, good barrier property and excellent physical property, can effectively improve the barrier property and low precipitation capacity of the fuel pipe during oil transportation, improves the service performance and flame retardant capacity of a vehicle fuel system, meets the national novel (national VI) emission standard, reduces the risk of fuel leakage of the oil feeding pipeline and the fuel system, and ensures that the fuel pipeline has better safety performance and oil transportation capacity in various environments.
TABLE 1 test results
As shown in Table 1, the multilayer fuel pipe prepared herein has superior properties to conventional five-layer conventional fuel pipesResistance to penetration of C E10, a test value of 1500h of only 0.20%, wherein insoluble precipitates in low precipitation are tested at 0.03, wherein soluble precipitates in low precipitation are 0.1, wherein the temperature of high temperature aging resistance is up to 135 ℃, wherein the equivalent stress exceeds 2 6N/MM 2 It can be seen that the performance not only meets the requirements of the application, but also greatly exceeds the condition of the prior art.
Example 2
This embodiment is basically the same as embodiment 1 except that:
specifically, the oil/fuel steam delivery pipe is creatively designed into five-layer structures including an outermost outer pipe wall layer 100, a second outer bonding layer 200, a middle low-precipitation low-permeability layer 300, a second inner bonding layer 400 and an innermost inner pipe wall layer 500, so that the design requirements of the oil/fuel steam delivery pipe are met, and the oil/fuel steam delivery pipe can be designed according to actual conditions during use as follows: taking the five-layer structure as an example, the manner is as follows (from the outermost layer to the innermost layer):
(1)PA12/TIE/EVOH/TIE/PA12
(2)PA12/TIE/EVOH/TIE/PA12con
(3)PA12/TIE/EVOH/TIE/EFEPcon
(4)PA12/TIE/EVOH/TIE/ETFEcon
(5)PA612/TIE/EVOH/TIE/PA612
(6)PA612/TIE/EVOH/TIE/PA612con
the design not only can save cost, but also brings the following advantages:
the physical property in the pipe is improved, so that the interior of the pipe has good impact resistance and chemical stability; meanwhile, the materials can be reasonably obtained in the market.
Simultaneously, the following technical effects are brought:
the multilayer structure realizes the combined application of multiple materials on the basis of the original single-layer structure, and can effectively realize the functions of multiple materials, such as the barrier property of an EVOH material and the low-precipitation property of an inner-layer low-precipitation material; the outer layer material also has a plurality of excellent performances such as excellent impact resistance, abrasion resistance, ozone resistance, aging resistance, illumination resistance and the like.
In addition, the materials of each layer are reasonably matched, and the raw materials of the inner layer and the outer layer are selected as low-cost materials, so the material has the obvious characteristic of low production cost; the production process can adopt a co-extrusion process for one-step molding, so that the cost is saved, the environmental protection and energy conservation are realized, and the method has great application potential. When the oil pipe is used as an oil conveying pipe of a vehicle, the overall service performance of the vehicle can be enhanced and improved. Besides being used as a vehicle fuel steam pipeline, the liquid fuel vapor pipeline can also be used as a delivery pipeline of other liquids.
While the invention has been described in further detail in connection with specific embodiments thereof, it will be understood that the invention is not limited thereto, and that various other modifications and substitutions may be made by those skilled in the art without departing from the spirit of the invention, which should be considered to be within the scope of the invention as defined by the appended claims.
Claims (8)
1. A low-permeability fuel pipe has a multilayer structure and is characterized by comprising the following components in sequence from outside to inside:
an outer pipe wall layer (100), an outer bonding layer (200), a low-precipitation low-permeation layer (300), an inner bonding layer (400), and an inner pipe wall layer (500); the outer pipe wall layer (100), the outer bonding layer (200), the low-precipitation low-permeability layer (300), the inner bonding layer (400) and the inner pipe wall layer (500) are sequentially connected;
the outer pipe wall layer (100) and the inner pipe wall layer (500) are both made of polyphthalamide; the low-precipitation low-permeability layer (300) is made of polyvinylidene fluoride material; the outer bonding layer (200) and the inner bonding layer (400) are both made of polyolefin materials.
2. The fuel pipe of claim 1, wherein the outer pipe wall layer (100) and the low-precipitation low-permeation layer (300) are bonded together by the outer bonding layer (200).
3. The fuel pipe of claim 1, wherein the inner pipe wall layer (500) and the low-precipitation low-permeation layer (300) are bonded together by the inner bonding layer (400).
4. The fuel pipe of claim 1, wherein the inner adhesive layer (400) is made of PA 612.
5. The low permeation fuel pipe of claim 1, wherein the thickness of the outer pipe wall layer (100) is 0.3mm to 0.5mm; the thickness of the outer bonding layer (200) is 0.05mm-0.15mm.
6. The low permeation fuel pipe of claim 1, wherein the low precipitation low permeation layer (300) has a thickness of 0.1mm to 0.2mm; the thickness of the inner bonding layer (400) is 0.05mm-0.15mm; the thickness of the inner pipe wall layer (500) is 0.1mm-0.5mm.
7. The fuel piping of claim 1, wherein said inner pipe wall layer (500) is made of ETFE and has a thickness of 0.2mm; the thickness of the outer bonding layer (200) is 0.15mm; the low-precipitation low-permeability layer (300) is made of EVOH, and the thickness of the low-precipitation low-permeability layer is 0.1mm; the thickness of the inner bonding layer (400) is 0.15mm; the inner pipe wall layer (500) is made of nylon 12, and the thickness of the inner pipe wall layer is 0.4mm.
8. The fuel piping of claim 1, wherein the inner pipe wall layer (500) is made of PPA and has a thickness of 0.2mm; the thickness of the outer bonding layer (200) is 0.15mm; the low-precipitation low-permeability layer (300) is made of PVDF, and the thickness of the low-precipitation low-permeability layer is 0.1mm; the thickness of the inner bonding layer (400) is 0.15mm; the inner pipe wall layer (500) has a thickness of 0.4mm.
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| CN202220495599.0U CN218326642U (en) | 2022-03-09 | 2022-03-09 | Low-permeability fuel pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508632A (en) * | 2022-03-09 | 2022-05-17 | 河北亚大汽车塑料制品有限公司 | High-flame-retardance multilayer fuel pipe and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508632A (en) * | 2022-03-09 | 2022-05-17 | 河北亚大汽车塑料制品有限公司 | High-flame-retardance multilayer fuel pipe and preparation method thereof |
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