CN210264989U - Filter element assembly of fuel filter - Google Patents
Filter element assembly of fuel filter Download PDFInfo
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- CN210264989U CN210264989U CN201920762772.7U CN201920762772U CN210264989U CN 210264989 U CN210264989 U CN 210264989U CN 201920762772 U CN201920762772 U CN 201920762772U CN 210264989 U CN210264989 U CN 210264989U
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Abstract
The utility model discloses a filter element assembly of a fuel filter, which comprises an upper end cover, a lower end cover, a central tube and a folded paper layer; the paper folding layer fixed between the upper end cover and the lower end cover is sleeved on the central pipe; the outer side of the folded paper layer is provided with a clamping strip; the folded paper layer is formed by folding nano-fiber composite filter paper; the nanofiber composite filter paper comprises a nanofiber membrane layer and a common filter paper layer; the nanofiber membrane layer comprises nanofibers which are stacked in gaps and on the surface of a common filter paper layer by adopting high-voltage electrostatic spinning equipment. The nanofiber membrane layer is formed on the surface of the base material by adopting a high-voltage electrostatic spinning method, the nanofiber material is prepared from modified TPU resin by adopting a high-voltage electrostatic spinning method, the contact angle of a TPU nanofiber net to oil is 0 degree, the contact angle to liquid water reaches 150 degrees, after the nanofiber net absorbs oil, the effects of oil-water separation, high efficiency and low resistance are achieved, emulsified water drops with the size of more than 2 microns can be blocked, and more than 99% of water contained in fuel oil can be separated.
Description
Technical Field
The utility model belongs to the technical field of internal-combustion engine fuel filter technique and specifically relates to a fuel filter element group spare.
Background
At present, almost all engineering machinery such as trucks and loaders use diesel engines, impurities such as various particulate matters, paraffin, moisture and the like exist in diesel oil used by the diesel engines more or less, and after the impurities pass through an oil supply system of the diesel engines, various defects such as oil spray nozzle blockage, cylinder corrosion, carbon deposition increase and the like can occur.
With the higher and higher filter precision requirement of the diesel filter on the filter material, a large amount of common filter paper and PP or PBT melt-blown cotton compounded fuel composite filter paper appears in the society at present, the filter precision and dust holding capacity of the filter paper compounded with melt-blown fibers are greatly improved, and a certain oil-water separation effect is also achieved.
The prior open patents of "a high-efficiency oil-water separation composite fiber membrane and a preparation method thereof" (CN201410125768.1), "a magnetic response high-efficiency oil-water separation fiber membrane and a preparation method thereof" (CN201410584912.8), "a high-efficiency electrostatic spinning oil-water separation fiber membrane (CN201610040433.9)," an oil-water separation fiber membrane with excellent anti-fouling capability and a preparation method thereof "(CN 201610580631.4)," a high-efficiency high-flux two-dimensional reticular superfine nanofiber oil-water separation material and a preparation method thereof "(CN 107557894B) and the like all report methods for preparing oil-water separation materials by using an electrostatic spinning method; however, the methods only relate to the principles of simple oil absorption, hydrophobicity and the like, and do not consider the complexity of the oil-water mixture to be filtered after the nanofiber material is applied to the actual working condition and the comprehensive requirements on the design of the filtering material and the filtering structure.
The PP or PBT fuel composite filter medium which is mainly used in the current market generally has the problems of poor oil-water separation effect and loss of the oil-water separation effect after being used for a period of time, and some fuel filters can cause frequent flameout of an engine due to overlarge resistance.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a fuel filter element group spare has high-efficient low resistance, has and lasts the oil-water separation effect.
In order to solve the technical problem, the purpose of the utility model is to realize like this:
the utility model relates to a fuel filter element assembly, which comprises an upper end cover, a lower end cover, a central tube and a folded paper layer; two ends of the central tube are fixed with the upper end cover and the lower end cover; the paper folding layer fixed between the upper end cover and the lower end cover is sleeved on the central pipe; the outer side of the paper folding layer is provided with a clamping strip;
the folded paper layer is formed by folding nanofiber composite filter paper; the nanofiber composite filter paper comprises a nanofiber membrane layer and a common filter paper layer; the nanofiber membrane layer comprises nanofibers which are stacked in gaps and on the surface of a common filter paper layer by adopting high-voltage electrostatic spinning equipment.
As further illustration of the proposal, the surface density of the common filter paper layer is 50-500GSM, and the air permeability under 200Pa is 100-600L/m2(ii) a unit of reaction, including,
a fiber aggregate composed of at least one of regenerated fibers, glass fibers and synthetic fibers, and
a sizing layer coated on the fiber assembly.
As a further illustration of the scheme, the nanofiber is a TPU nanofiber prepared by high-voltage electrostatic spinning equipment.
As a further illustration of the above scheme, the other side of the common filter paper layer stacked with the nanofiber membrane layer is also sequentially compounded with a melt-blown cotton layer and a common non-woven fabric layer.
As a further illustration of the scheme, the melt-blown cotton layer at least comprises one of PBT, PET, PPS, PP and aramid fiber, the average diameter of the fiber in the melt-blown cotton layer is 0.5-10 μm, and the surface density is 30-300 GSM.
As a further explanation of the above scheme, the common non-woven fabric layer is a thermal bonding non-woven fabric made of PBT, PET, PPS or PP; the average diameter of the fiber in the common non-woven fabric layer is 5-200 mu m, and the surface density is 10-300 GSM.
As a further explanation of the above scheme, the common filter paper layer, the melt-blown cotton layer and the common non-woven fabric layer, on which the nanofiber membrane layer is stacked, are bonded by hot melt adhesives in various shapes such as a dot shape, a linear shape, a strip shape or a fibrous shape, and the area of the bonding point of the hot melt adhesives accounts for 0.01 to 10 percent of the area of the whole composite material.
As a further explanation of the above scheme, the common filter paper layer, the meltblown cotton layer and the common nonwoven fabric layer stacked with the nanofiber membrane layer are formed into a laminated structure by ultrasonic or thermal compounding.
The utility model has the advantages that: the utility model relates to a fuel filter element group spare, the nanofiber composite filter paper that uses, including the nanofiber rete that adopts the high-pressure electrostatic spinning method to form on the substrate surface, the nanofiber material adopts modified TPU resin to prepare through the high-pressure electrostatic spinning method and forms, TPU nanofiber net is 0 to the oil contact angle, reaches 150 to the contact angle of liquid water, after the nanofiber net oil absorption, has the effect of water oil separating and high-efficient low resistance, can block the emulsification water droplet more than 2 microns, can separate more than 99% to the moisture that contains in the fuel.
The nanofiber membrane layer is formed by combining a nanofiber layer with a uniform diameter and a pearl-shaped nanofiber layer, the pearl-shaped nanofiber contains a solvent which is not completely volatilized, the solvent can ensure that the nanofiber layer and a common filter paper layer are tightly combined, and the nanofiber is prevented from being scattered or stripped when high-pressure fuel passes through the solvent.
The stable nanofiber membrane can continuously and effectively separate emulsified water and free water molecules in fuel oil, the emulsified water and the free water molecules are gathered on the surface of the nanofiber membrane to form large water drops, and the water drops sink to a water collecting cup at the bottom of the fuel oil filter under the action of gravity, so that the purpose of oil-water separation is achieved.
After water in the fuel is separated, impurities such as fine particles, paraffin and the like in the fuel enter the common filter paper layer and the melt-blown superfine non-woven fabric layer through the nano-fiber film layer and are adsorbed, so that the high filtering efficiency of the nano-fiber composite filter material on the impurities in the fuel is realized.
Drawings
FIG. 1 is a cross-sectional view of a filter cartridge assembly;
FIG. 2 is a diagram of the folding pattern of the nanofiber composite filter paper;
FIG. 3 is a schematic structural diagram of a nanofiber composite filter paper according to one embodiment;
FIG. 4 is a schematic view of a mass production apparatus for nanofibers;
fig. 5 is a schematic structural diagram of the nanofiber composite filter paper in the second embodiment.
The designations in the figures illustrate the following: 001-unwinding device, 002-winding device, 01-spinning assembly I, 011-receiving screen I, 012-spinning head I, 02-spinning assembly II, 021-receiving screen II, 022-spinning head II; 430-nanofiber composite filter paper, 431-nanofiber membrane layer, 432-common filter paper layer, 433-melt-blown cotton layer, 434-common non-woven fabric layer; 41-lower end cover, 42-clamping strip, 43-folded paper layer, 44-central tube, 45-double-component glue, 46-upper end cover.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Example one
The present embodiment will be described in detail with reference to fig. 1, 2, 3, and 4. The fuel filter element assembly according to the embodiment comprises an upper end cover 41, a lower end cover 46, a central pipe 44 and a folded paper layer 43. The two ends of the central tube 44 are fixed with the upper end cover 41 and the lower end cover 46; the paper folding layer 43 fixed between the upper end cover 41 and the lower end cover 46 is sleeved on the central pipe 44; the outside of the folded paper layer 43 is provided with a holding strip 42.
The folded paper layer 43 is formed by folding 430 the nanofiber composite filter paper; the nanofiber composite filter paper 430 comprises a nanofiber membrane layer 431 and a common filter paper layer 432, wherein the nanofiber membrane layer 431 comprises nanofibers which are stacked in gaps and on the surface of the common filter paper layer 432 by adopting high-voltage electrostatic spinning equipment.
Two ends of the folded nanofiber composite filter paper 430 are bonded with the upper end cover 41 and the lower end cover 46 by adopting two-component glue 45, and the adopted two-component glue 45 is two-component polyurethane glue. The nanofiber composite filter paper 430 should be uniformly arranged in a folding manner along the circumferential folding distance. The center tube 44, the upper end cap 41 and the lower end cap 46 are made of electrolytic galvanized steel. The holding strip 42 is made of electrolytic tin steel and is arranged in an inverted manner.
The nanofiber composite filter paper 430 is folded into a cylinder in the manner of fig. 2, and is wrapped outside the central tube 44. The nanofiber membrane layer 431 of the nanofiber composite filter paper 430 faces outward as an oil inlet surface, and the common filter paper layer 432 of the nanofiber composite filter paper 430 faces inward as an oil outlet surface and is tightly attached to the central tube 44. The folded paper layer 43 formed by folding the nanofiber composite filter paper 430 is combined with the lower end cap 41 and the upper end cap 46 by the double-glue 45 to form a filter element assembly.
In the present embodiment, the nanofiber composite filter paper 430 includes a nanofiber membrane 431 and a common filter paper layer 432, and the nanofiber membrane includes nanofibers deposited in the gaps and on the surface of the common filter paper layer by using a high voltage electrostatic spinning device.
In this embodiment, the surface density of the common filter paper layer 432 is 50-500GSM, and the air permeability under 200Pa is 100-600L/m2And s. The common filter paper layer 432 includes a fiber assembly composed of at least one of regenerated fiber, glass fiber, and synthetic fiber, and a size layer coated on the fiber assembly. In the present embodiment, the material used for the fiber aggregate is preferably wood pulp fiber, and may be glass fiber, synthetic fiber, or a mixture of two or three thereof. The synthetic fibers are preferably PET and may also be PP, PE, PPs or PP.
The nanofiber is TPU nanofiber prepared by high-voltage electrostatic spinning equipment. The deposition of TPU nanofibers on the common filter paper layer 432 includes the deposition of uniform diameter nanofiber layers and pearl-like nanofiber layers on the common filter paper layer 432. The thickness of the uniform diameter nanofiber layer is 1-5 μm, the surface density is 0.5-5 GSM, and the average diameter of the fiber is 50-500 nm. The thickness of the pearl-shaped nano fiber layer is 0.1-1 mu m, the surface density is 0.1-1 GSM, the average diameter of the fiber is 50-200 nm, and the diameter of pearl-shaped TPU particles is 1-10 microns. The method specifically comprises the following steps:
preparing two electrostatic spinning solutions, wherein the first electrostatic spinning solution is formed by dissolving TPU in N, N-dimethylformamide and acetone mixed solvent, and the mass fraction of the TPU is 8-20%. The second electrostatic spinning solution is formed by dissolving TPU in N, N-dimethylformamide and acetone mixed solvent, and the mass fraction of TPU is 2% -8%. N, N-dimethylformamide and acetone in a mass fraction ratio of 3: 7-10: 0, wherein N, N-dimethyl formamide solution can be replaced by N, N-dimethyl acetamide solution, and acetone solution can be replaced by butanone solution.
The TPU is a TPU resin containing siloxane group branched chain, the molecular weight is 40000-200000, the molecular weight of the siloxane group accounts for 5% -50%, and the carbon atom number of the siloxane branched chain is 4-16.
The first electrostatic spinning solution is subjected to high-voltage electrostatic spinning to form nano fibers through a first 01 spinning pack in the high-voltage electrostatic spinning mass production equipment shown in fig. 4, the nano fibers are stacked on the surface of the common filter paper layer 430 below the first receiving screen 011 in an unordered mode, the distance between the first receiving screen 011 and the first spinning nozzle 012 is 5-50 cm, and the voltage between the first receiving screen 011 and the first spinning nozzle 012 is 10-100 KV. A nanofiber layer of uniform diameter may be deposited on the surface of the common filter paper layer 432 during this step.
The second electrostatic spinning solution is subjected to high-voltage electrostatic spinning by a second spinning assembly 02 in the high-voltage electrostatic spinning mass production equipment shown in fig. 4 to form a pearl chain-shaped nanofiber, the nanofiber is stacked on the common filter paper layer 432 below the second receiving screen 021 in an unordered manner to form nanofiber composite filter paper 430, the distance between the second receiving screen 021 and the second spinning nozzle 022 is 5-50 cm, and the voltage between the second receiving screen 021 and the second spinning nozzle 022 is 10-100 KV.
And a tension roller is arranged between the first spinneret assembly 01 and the second spinneret assembly 02 and is used for adjusting the tension of the base material in the production process, so that the common filter paper layer 432 is in contact with the first receiving screen 011 and the second receiving screen 021. The unwinding linear speed of the unwinding device 01 and the winding linear speed of the winding device 02 are the same as the linear speeds of the first receiving screen 011 and the second receiving screen 021, and therefore the tension in the production operation process can be basically uniform.
The TPU nano-fiber net prepared from the modified TPU resin by a high-voltage electrostatic spinning method has an oil contact angle of 0 degree, a contact angle of 150 degrees to liquid water, and after the nano-fiber film layer absorbs oil, the oil-water separation and high-efficiency low-resistance effects are achieved, emulsified water drops with the size of more than 2 microns can be blocked, and water contained in fuel oil can be separated by more than 99%.
The nanofiber membrane layer 431 is formed by combining a nanofiber layer with a uniform diameter and a pearl-shaped nanofiber layer, the pearl-shaped nanofiber contains a solvent which is not completely volatilized, the solvent can ensure that the nanofiber membrane layer 431 is tightly combined with the common filter paper layer 432, and the nanofiber membrane layer 431 is ensured not to be scattered or stripped when high-pressure fuel passes through.
The formed stable nanofiber membrane can continuously and effectively separate emulsified water and free water molecules in fuel oil, large water drops are gathered on the surface of the nanofiber membrane, and the water drops sink to a water collecting cup at the bottom of the fuel oil filter under the action of gravity, so that the purpose of oil-water separation is achieved.
Example two
The fuel filter cartridge assembly according to the present embodiment will be described in detail with reference to fig. 1, 2, 4, and 5. The difference between this embodiment and the first embodiment is: the nanofiber composite filter paper 430 used in this embodiment includes a common filter paper layer 432 on which a nanofiber membrane layer 431 is stacked, and a meltblown cotton layer 433 and a common non-woven fabric layer 434 that are sequentially combined on the other side of the common filter paper layer 432. During assembly into the filter element assembly, the nanofiber membrane 431 faces outward as an oil inlet face, and the common nonwoven layer 434 faces inward as an oil outlet face and is attached to the central tube 44.
The melt-blown cotton layer 433 at least comprises one of PBT, PET, PPS, PP and aramid fiber, the average diameter of the fiber in the melt-blown cotton layer 433 is 0.5-10 μm, and the surface density is 30-300 GSM. In the present embodiment, PET is preferable, and other fiber materials may be selected according to actual needs. The average diameter is preferably 5 μm and the areal density is preferably 50 GSM.
The common non-woven fabric layer 434 is a thermal bonding non-woven fabric made of PBT, PET, PPS or PP; the average diameter of the fibers in the conventional nonwoven layer 434 is 5 to 200 μm, and the areal density is 10 to 300 GSM. In the present embodiment, the material is preferably PP, or other fiber material may be selected according to actual needs, the average diameter is preferably 50 μm, and the area density is preferably 250GSM
In this embodiment, the common filter paper layer 432, the meltblown cotton layer 433, and the common nonwoven fabric layer 434, on which the nanofiber film layer 431 is deposited, are bonded by hot melt adhesives in various shapes such as dots, lines, strips, or fibers, and the area of the hot melt adhesive bonding points accounts for 0.01 to 10% of the total area of the composite material.
After water in the fuel is separated, impurities such as fine particles, paraffin and the like in the fuel enter the common filter paper layer and the melt-blown superfine non-woven fabric layer through the nano-fiber film layer and are adsorbed, so that the high filtering efficiency of the nano-fiber composite filter material on the impurities in the fuel is realized.
EXAMPLE III
The fuel filter cartridge assembly according to the present embodiment will be described in detail with reference to fig. 1, 2, 4, and 5. The difference between this embodiment and the second embodiment is: the common filter paper layer 432 on which the nanofiber membrane layer 431 is stacked, the melt-blown cotton layer 433, and the common nonwoven fabric layer 434 are compounded by ultrasonic waves or hot pressing to form a laminated structure.
The melt-blown cotton layer 433 at least comprises one of PBT, PET, PPS, PP and aramid fiber, the average diameter of the fiber in the melt-blown cotton layer 433 is 0.5-10 μm, and the surface density is 30-300 GSM. In this embodiment, PBT is preferable, and other fiber materials may be selected according to actual needs. The average diameter is preferably 2 μm and the areal density is preferably 250 GSM.
The common non-woven fabric layer 434 is a thermal bonding non-woven fabric made of PBT, PET, PPS or PP; the average diameter of the fibers in the conventional nonwoven layer 434 is 5 to 200 μm, and the areal density is 10 to 300 GSM. In the present embodiment, the material is preferably PP, or other fiber materials may be selected as required, and the average diameter is preferably 100 μm and the area density is preferably 20 GSM.
The filter element assemblies of the first to third examples have a filtration efficiency of 99% or more for fine particles having an average diameter of 4 μm or less, and a typical filter element assembly has a filtration efficiency of 70 to 75%. And the emulsified water drops with the diameter of more than 2 microns can be blocked, and more than 99 percent of water contained in the fuel can be separated.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (8)
1. A fuel filter element assembly is characterized by comprising an upper end cover, a lower end cover, a central pipe and a folded paper layer; two ends of the central tube are fixed with the upper end cover and the lower end cover; the paper folding layer fixed between the upper end cover and the lower end cover is sleeved on the central pipe; the outer side of the paper folding layer is provided with a clamping strip;
the folded paper layer is formed by folding nanofiber composite filter paper; the nanofiber composite filter paper comprises a nanofiber membrane layer and a common filter paper layer; the nanofiber membrane layer comprises nanofibers which are stacked in gaps and on the surface of a common filter paper layer by adopting high-voltage electrostatic spinning equipment.
2. The fuel filter element assembly as set forth in claim 1, wherein the normal filter paper layer has an areal density of 50-500GSM and an air permeability of 100-600L/m at 200Pa2And/s, comprising a fiber assembly, and a sizing layer coated on the fiber assembly.
3. The fuel filter cartridge assembly of claim 1, wherein said nanofibers are TPU nanofibers made by high voltage electrospinning equipment.
4. The fuel filter element assembly according to claim 1, wherein the other side of the common filter paper layer stacked with the nanofiber membrane layer is further compounded with a melt-blown cotton layer and a common non-woven fabric layer in sequence.
5. The fuel filter element assembly according to claim 4, wherein said meltblown cotton layer has fibers with an average diameter of 0.5-10 μm and an areal density of 30-300 GSM.
6. A fuel filter element assembly according to claim 4, wherein said common non-woven fabric layer is a thermal bonding non-woven fabric made of PBT, PET, PPS or PP; the average diameter of the fiber in the common non-woven fabric layer is 5-200 mu m, and the surface density is 10-300 GSM.
7. A fuel filter element assembly according to claim 4, wherein the common filter paper layer, the melt-blown cotton layer and the common non-woven fabric layer on which the nanofiber membrane layer is stacked are bonded by spot, line, strip or fibrous hot melt adhesives, and the area of the hot melt adhesive bonding points accounts for 0.01-10% of the area of the whole composite material.
8. The fuel filter cartridge assembly according to claim 4, wherein the common filter paper layer, the melt-blown cotton layer and the common non-woven fabric layer stacked with the nanofiber membrane layer are formed in a laminated structure by ultrasonic or thermal compounding.
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| CN201920762772.7U CN210264989U (en) | 2019-05-25 | 2019-05-25 | Filter element assembly of fuel filter |
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| CN201920762772.7U CN210264989U (en) | 2019-05-25 | 2019-05-25 | Filter element assembly of fuel filter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112933800A (en) * | 2021-02-07 | 2021-06-11 | 江苏人和环保设备有限公司 | Rhombus filter drum dust remover |
| CN112957846A (en) * | 2021-02-05 | 2021-06-15 | 江苏人和环保设备有限公司 | Antistatic nano filter cylinder |
| CN112957845A (en) * | 2021-02-05 | 2021-06-15 | 江苏人和环保设备有限公司 | Flame-retardant nano filter cylinder |
| CN112957844A (en) * | 2021-02-05 | 2021-06-15 | 江苏人和环保设备有限公司 | Nanometer filter cylinder |
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2019
- 2019-05-25 CN CN201920762772.7U patent/CN210264989U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112957846A (en) * | 2021-02-05 | 2021-06-15 | 江苏人和环保设备有限公司 | Antistatic nano filter cylinder |
| CN112957845A (en) * | 2021-02-05 | 2021-06-15 | 江苏人和环保设备有限公司 | Flame-retardant nano filter cylinder |
| CN112957844A (en) * | 2021-02-05 | 2021-06-15 | 江苏人和环保设备有限公司 | Nanometer filter cylinder |
| CN112933800A (en) * | 2021-02-07 | 2021-06-11 | 江苏人和环保设备有限公司 | Rhombus filter drum dust remover |
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