CN212054953U

CN212054953U - Fuel filter

Info

Publication number: CN212054953U
Application number: CN202020886649.9U
Authority: CN
Inventors: 汤金鹏; 覃文豪; 张金玲; 李�权; 王成云; 顾晶晶
Original assignee: Wuxi Yili Environmental Protection Technology Co Ltd; Hebei Yili Technology Co Ltd
Current assignee: Wuxi Yili Environmental Protection Technology Co Ltd; Hebei Yili Technology Co Ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2020-12-01
Anticipated expiration: 2030-05-25

Abstract

The utility model discloses a fuel filter, a filter element assembly is arranged in a shell, an end cover is arranged at the upper end part of the shell, an oil inlet for conducting a dirty oil side and an oil outlet for conducting a clean oil side are arranged on the end cover, a filter paper layer, a framework and a central net pipe are sequentially arranged in the filter element assembly from the outside to the inside, and a drainage cavity is formed between the central net pipe and the framework; the central net pipe is integrated with a flow guide pipe and a water repellent net, the water repellent net is positioned on the periphery of the flow guide pipe, a flow guide cavity with one closed end and one opened end is formed between the flow guide pipe and the water repellent net, and an oil outlet channel in the center of the flow guide pipe is communicated with the flow guide cavity through the opening. The utility model discloses a surface interception foreign particle, the hierarchical interception filtration mode of internal surface water accumulation dewatering can realize life-cycle water oil separating efficiency, and impurity filtration efficiency is higher, and mileage maintenance life-span is longer. The central net pipe is integrally formed by injection molding, and the flow guide pipe and the water repellent net are directly integrated into a whole, so that the production and assembly processes are simplified, and the production and assembly costs are reduced.

Description

Fuel filter

Technical Field

The utility model belongs to the technical field of the fuel filtration technique and specifically relates to a fuel filter.

Background

In recent years, with the stricter requirements of vehicle emission regulations, the cleanness and high efficiency of an engine fuel system play an important role in the performance of an engine. The fuel filter is used as an important part of an engine fuel system, and is mainly used for intercepting and filtering pollutants such as moisture, impurity particles and the like in fuel, providing clean fuel for the engine combustion system, preventing a fuel nozzle from being rusted and blocked, avoiding carbon deposition in a combustion chamber of an engine and further ensuring normal operation of the fuel system.

Traditional fuel filter adopts the filtration mode of intercepting foreign particles and moisture simultaneously at the surface of filter paper layer usually, and the filtration efficiency of moisture is lower, and partial tiny particle moisture in the fuel probably is not thoroughly filtered, can pass inside filter paper layer gets into the filter core, and then carries to the combustion chamber of engine in, influences fuel oil system's normal operating. Moreover, the conventional fuel filter may occasionally admit air after the automobile is parked for a period of time, and the entering air may block the supply of fuel, so that the engine cannot be normally started.

SUMMERY OF THE UTILITY MODEL

The applicant aims at the defects that the oil-water separation filtering efficiency of the existing fuel filter is low, the fuel supply is blocked due to the air inlet phenomenon and the like, and provides a fuel filter with a reasonable structure.

The utility model discloses the technical scheme who adopts as follows:

a fuel filter, install the filter core assembly in the outer casing, form the dirty oil side located outside the filter core assembly and locate at the clean oil side of the centre of the filter core assembly, there are end caps on the upper end of the outer casing, offer the oil inlet to conduct dirty oil side and lead to the oil outlet of the clean oil side on the end cap, the filter core assembly sets up the paper filter layer, skeleton, central network management sequentially from outside to inside, form the hydrophobic cavity between central network management and skeleton; the central net pipe is integrated with a flow guide pipe and a water repellent net, the water repellent net is positioned on the periphery of the flow guide pipe, a flow guide cavity with one closed end and one opened end is formed between the flow guide pipe and the water repellent net, and an oil outlet channel in the center of the flow guide pipe is communicated with the flow guide cavity through the opening.

The utility model discloses a surface interception foreign particle, the hierarchical interception filtration mode of internal surface water accumulation dewatering can realize life-cycle water oil separating efficiency, and impurity filtration efficiency is higher, and mileage maintenance life-span is longer. The central net pipe is integrally formed by injection molding, and the flow guide pipe and the water repellent net are directly integrated into a whole, so that the production and assembly processes are simplified, and the production and assembly costs are reduced.

As a further improvement of the above technical solution:

the central net pipe is provided with a second air hole which is communicated with the drainage cavity and the oil purification side.

And a plurality of reinforcing ribs are arranged between the water repellent net of the central net pipe and the flow guide pipe.

The utility model discloses an evenly set up a plurality of vertical strengthening ribs along circumference between the repellent net of central authorities' network management and the honeycomb duct, can increase the intensity of repellent net and honeycomb duct, avoid taking place to sink when injection moulding and warp.

The length of the flow guide pipe of the central net pipe is less than that of the water repellent net.

The central net pipe is integrally formed by injection molding.

The upper end and the lower end of the filter element assembly are fixed with an upper cover and a lower cover, the upper cover is provided with a first air hole, and the first air hole is communicated with a dirty oil side and a clean oil side.

The utility model discloses a first gas pocket of upper cover switches on dirty oil side and clean oil side, and the second gas pocket of central network management switches on hydrophobic chamber and clean oil side, and the gas in dirty oil side, the hydrophobic intracavity can be discharged to clean oil side through first gas pocket, second gas pocket, and then discharges from the oil-out, avoids the gas to block the fuel feeding of engine, guarantees the engine normal start.

The lower cover is provided with a drain hole, and a drain cavity of the drain hole and the water level alarm assembly.

The filter paper layer adopts cohesive water type filter paper.

The utility model discloses a filter paper layer adopts cohesion water type filter paper, and filter paper layer surface interception foreign particle, moisture pass through filter paper layer and get into the internal surface, gather into the large granule water droplet at the internal surface, more do benefit to the water droplet and fall down under the action of gravity, and then discharge from the wash port, improve water oil separating efficiency.

A sealing plate is arranged between the shell and the end cover, and the lower surface of the sealing plate is tightly attached to the upper surface of the end cover; the upper port of the shell is provided with a first curling edge, the outer side of the sealing plate is correspondingly provided with a second curling edge, and the first curling edge and the second curling edge are mutually bitten to seal the can.

The utility model discloses a first turn-up of shell and the mutual seaming of the second turn-up of closing plate can be in the same place, realize the sealed between shell and the end cover, the leakproofness is better.

A plurality of oil inlets of the corresponding end cover of inboard side of closing plate are provided with a plurality of cards respectively, and the card is gone into in the oil inlet.

The utility model has the advantages as follows:

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a sectional view a-a of fig. 2.

Fig. 4 is an enlarged view of a portion B in fig. 3.

Fig. 5 is an enlarged view of a portion C in fig. 3.

Fig. 6 is an enlarged view of a portion D in fig. 3.

Figure 7 is a perspective cut-away view of the central mesh tube.

Fig. 8 is a perspective view of the sealing plate.

In the figure: 1. a housing; 10. dirty oil side; 11. a clean oil side; 12. a first crimp; 2. an end cap; 21. an oil inlet; 22. an oil outlet; 23. a first convex ring; 3. a water level alarm assembly; 4. a filter element assembly; 41. an upper cover; 411. an upper convex ring; 412. a lower convex ring; 413. a first air hole; 42. a lower cover; 421. a drain hole; 43. a filter paper layer; 44. a framework; 45. a central network manager; 451. a water repellent net; 452. a flow guide pipe; 453. a second air hole; 454. reinforcing ribs; 455. a second convex ring; 46. a drainage cavity; 47. a flow guide cavity; 48. an oil outlet channel; 5. a sealing plate; 51. second curling; 52. a card; 6. briquetting; 7. a first seal member; 8. a second seal member; 9. a spring.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1 and 2, an end cover 2 is arranged at the upper end of a shell 1 of the present invention, and a sealing plate 5 is arranged between the shell 1 and the end cover 2; an oil inlet 21 and an oil outlet 22 are formed in the end cover 2, and the plurality of oil inlets 21 are circumferentially arranged on the periphery of the oil outlet 22; as shown in fig. 1, the lower end of the housing 1 is connected with a water level alarm assembly 3 through threads; as shown in fig. 3, a filter element assembly 4 is installed inside the housing 1, a spring 9 is arranged below the filter element assembly 4, the filter element assembly 4 is pressed onto the end cover 2 by the spring 9, a dirty oil side 10 is formed between the outer surface of the filter element assembly 4 and the inner surface of the housing 1, the dirty oil side 10 is communicated with an oil inlet 21 of the end cover 2, a clean oil side 11 is arranged in the center of the filter element assembly 4, and the clean oil side 11 is communicated with an oil outlet 22.

As shown in fig. 3, the filter paper layer 43 of the filter element assembly 4 is sleeved on the periphery of the framework 44, the central mesh tube 45 is inserted into the inner side of the framework 44, a drainage cavity 46 is formed between the outer surface of the central mesh tube 45 and the inner surface of the framework 44, and the center of the central mesh tube 45 is communicated with the oil outlet 22 of the end cap 2; the upper and lower ends of the filter paper layer 43 are fixed with the upper cover 41 and the lower cover 42 by adhesion, respectively, and the first sealing member 7 is arranged between the upper cover 41 and the end cover 2; a second sealing element 8 is arranged between the lower cover 42 and the inner wall surface of the shell 1, and the second sealing element 8 is arranged in a groove on the outer wall surface of the lower cover 42; the lower cover 42 is provided with a drainage hole 421, and the drainage hole 421 connects the drainage cavity 46 and the water level alarm assembly 3. The filter paper layer 43 is made of cohesive water type filter paper, impurity particles are intercepted on the outer surface of the filter paper layer 43, water penetrates through the filter paper layer 43 and enters the inner surface, large water drops are gathered on the inner surface, the water drops can fall downwards under the action of gravity and then are discharged from the water discharge hole 421, and a small amount of water drop particles reach the outer surface of the central mesh pipe 45 under the action of fuel oil flowing inertia and are intercepted by the water repellent net 451 of the central mesh pipe 45 for the second time, so that the oil-water separation efficiency is improved.

As shown in fig. 3, a first convex ring 23 protrudes from the center of the end cover 2, and the center of the first convex ring 23 is an oil outlet 22. As shown in fig. 4 and 5, an upper collar 411 and a lower collar 412 are respectively protruded from the center of the upper cover 41 of the filter cartridge assembly 4; as shown in fig. 5, the upper collar 411 is sleeved on the outer side of the first collar 23 of the end cover 2, a gap is formed between the upper collar 411 and the first collar 23, a first air hole 413 is radially formed in the upper collar 411, the first air hole 413 conducts the dirty oil side 10 and the clean oil side 11, and air in the dirty oil side 10 can be discharged to the clean oil side 11 through the first air hole 413, and then discharged from the oil outlet 22, so that air is prevented from blocking oil supply of the engine, and normal starting of the engine is ensured.

As shown in fig. 4 and 7, the center of the central mesh tube 45 is a cylindrical flow guide tube 452, the center of the flow guide tube 452 is an oil outlet channel 48 for guiding the oil outlet 22, a water repellent net 451 is arranged on the periphery of the flow guide tube 452, a gap is arranged between the water repellent net 451 and the flow guide tube 452, the water repellent net 451 is flush with and closed to the upper end of the flow guide tube 452, the length of the flow guide tube 452 is smaller than that of the water repellent net 451, the length of the flow guide tube 452 is 1/4-1/3 of the length of the water repellent net 451, a flow guide cavity 47 with a closed upper end and an open lower end is formed between the water repellent net 451 and the flow guide tube 452, the opening guides the flow guide cavity 47 and the oil outlet channel 48, and the fuel enters the oil outlet channel 48 from; a plurality of vertical reinforcing ribs 454 are uniformly arranged between the water repellent net 451 and the flow guide pipe 452 along the circumferential direction, so that the strength of the water repellent net 451 and the flow guide pipe 452 can be increased, and the collapse deformation during injection molding is avoided. The upper end of the central net tube 45 protrudes upwards to form a second bulge loop 455, a step is formed between the lower end of the second bulge loop 455 and the upper end of the flow guide tube 452, a second air hole 453 is formed in the step and located outside the water repellent net 451, as shown in fig. 3, the second bulge loop 455 is sleeved outside the upper cover 41, a certain gap is formed between the second bulge loop 455 and the upper end of the flow guide tube, the second air hole 453 is communicated with the drainage cavity 46 and the clean oil side 11, and the gas in the drainage cavity 46 is discharged to the clean oil side 11 through the second air hole 453 and further discharged from the oil outlet 22, so that the oil supply of the engine is prevented from being blocked by the gas, and the normal starting of. The central net pipe 45 is integrally injection molded, and the flow guide pipe 452 and the water repellent net 451 are directly integrated into a whole, so that the production and assembly processes are simplified, and the production and assembly costs are reduced.

As shown in fig. 6, the sealing plate 5 is disposed on the upper side of the housing 1 and the end cap 2, the upper surface of the sealing plate 5 is pressed by the pressing block 6, and the lower surface of the sealing plate 5 is attached to the upper surface of the end cap 2; the upper port of the shell 1 is bent to form a first curled edge 12, as shown in fig. 6 and 8, the outer side of the sealing plate 5 is correspondingly bent to form a second curled edge 51, as shown in fig. 6, the first curled edge 12 of the shell 1 and the second curled edge 51 of the sealing plate 5 are mutually engaged and sealed together, so that the sealing between the shell 1 and the end cover 2 is realized, and the sealing performance is better; as shown in fig. 6 and 8, a plurality of clamping pieces 52 are respectively disposed on the inner side of the sealing plate 5 corresponding to the plurality of oil inlets 21 of the end cover 2, and as shown in fig. 6, the clamping pieces 52 are clamped into the oil inlets 21 to circumferentially and axially position the sealing plate 5.

During actual use, diesel oil enters the dirty oil side 10 from the oil inlet 21 of the end cover 2, then impurity particles are intercepted and filtered through the filter paper layer 43 of the filter element assembly 4 and then enter the drainage cavity 46, at the moment, moisture in the fuel oil also enters the drainage cavity 46 through the filter paper layer 43 and is gathered into large-particle water drops on the inner surface of the filter paper layer 43, and the large-particle water drops are discharged into the water level alarm component 3 from the water discharge hole 421 of the lower cover 42 under the action of gravity; the fuel in the drainage cavity 46 enters the flow guide cavity 47 through the water repellent net 451 of the central mesh pipe 45, enters the oil outlet channel 48 from the opening of the flow guide cavity 47, and is output from the oil outlet 22, at this time, a small amount of water droplet particles still contained in the fuel are intercepted again in the drainage cavity 46 by the water repellent net 451 and are discharged from the water discharge hole 421 of the lower cover 42 under the action of gravity, and therefore the classified filtration of the impurity particles and the water of the fuel is achieved. The utility model discloses a surface interception foreign particle, the hierarchical interception filtration mode of internal surface water accumulation dewatering can realize life-cycle water oil separating efficiency, and impurity filtration efficiency is higher, and mileage maintenance life-span is longer.

The above description is illustrative of the present invention and is not intended to limit the present invention, and the present invention may be modified in any manner without departing from the spirit of the present invention.

Claims

1. The utility model provides a fuel filter, establishes filter core assembly (4) in shell (1), forms dirty oil side (10) that is located the filter core assembly (4) outside and is located clean oil side (11) of filter core assembly (4) central authorities, and shell (1) upper end is equipped with end cover (2), sets up oil inlet (21) that switch on dirty oil side (10) on end cover (2) and switches on oil-out (22) of clean oil side (11), its characterized in that: the filter element assembly (4) is provided with a filter paper layer (43), a framework (44) and a central mesh pipe (45) from outside to inside in sequence, and a drainage cavity (46) is formed between the central mesh pipe (45) and the framework (44);

the central net pipe (45) is integrated with a flow guide pipe (452) and a water repellent net (451), the water repellent net (451) is positioned on the periphery of the flow guide pipe (452), a flow guide cavity (47) with one closed end and one open end is formed between the flow guide pipe (452) and the water repellent net, and an oil outlet channel (48) in the center of the flow guide pipe (452) is communicated with the flow guide cavity (47) through the opening.

2. A fuel filter according to claim 1 wherein: the central net pipe (45) is provided with a second air hole (453), and the second air hole (453) is communicated with the drain cavity (46) and the clean oil side (11).

3. A fuel filter according to claim 1 wherein: a plurality of reinforcing ribs (454) are arranged between the water repellent net (451) of the central net pipe (45) and the flow guide pipe (452).

4. A fuel filter according to claim 1 wherein: the length of the flow guide pipe (452) of the central net pipe (45) is smaller than that of the water repellent net (451).

5. A fuel filter according to any one of claims 1 to 4 wherein: the central net pipe (45) is integrally formed by injection molding.

6. A fuel filter according to claim 1 wherein: an upper cover (41) and a lower cover (42) are fixed at the upper end part and the lower end part of the filter element assembly (4), a first air hole (413) is formed in the upper cover (41), and the dirty oil side (10) and the clean oil side (11) are communicated through the first air hole (413).

7. A fuel filter according to claim 6 wherein: the lower cover (42) is provided with a drain hole (421), and the drain hole (421) is connected with a drainage cavity (46) and the water level alarm component (3).

8. A fuel filter according to claim 1 wherein: the filter paper layer (43) adopts cohesive water type filter paper.

9. A fuel filter according to claim 1 wherein: a sealing plate (5) is arranged between the shell (1) and the end cover (2), and the lower surface of the sealing plate (5) is tightly attached to the upper surface of the end cover (2); the upper port of the shell (1) is provided with a first curled edge (12), the outer side of the sealing plate (5) is correspondingly provided with a second curled edge (51), and the first curled edge (12) and the second curled edge (51) are mutually seamed for sealing the can.

10. A fuel filter according to claim 9 wherein: a plurality of clamping pieces (52) are arranged on the inner side edge of the sealing plate (5) corresponding to the plurality of oil inlets (21) of the end cover (2), and the clamping pieces (52) are clamped in the oil inlets (21).