CN212202307U - Fuel filter integrating multistage filtration - Google Patents

Abstract

The utility model discloses an integrated multi-stage filtration's fuel filter, be in including filter bowl, setting filter element group spare in the filter bowl, and install the filter seat in the filter bowl upper end, the oil inlet end of filter seat communicates to the oil inlet of filter element group spare, the oil-out of filter element group spare communicates to the play oil end of filter seat, filter element group spare includes the upper end cover, the lower extreme cover, set up the second grade filter core between upper end cover and lower extreme cover, and set up the center tube at second grade filter core middle part, the oil inlet, the oil-out sets up on the upper end cover, the upper end cover includes the upper end cover body, and set up at upper end cover body lower extreme and extend to the oil pipe that leads of lower extreme cover, lead to the oil pipe oil inlet, the center tube communicates to the oil-out, be equipped with on the lower extreme cover and. The utility model provides a fuel filter can carry out multistage filtration to the fuel, reduces the injury to the engine.

Description

Fuel filter integrating multistage filtration

Technical Field

The utility model belongs to the technical field of auto-parts, in particular to integrated multi-stage filtration's fuel filter.

Background

The fuel filter is used for filtering pollutants such as particle impurities, moisture and the like in fuel, so that the cleanliness level of the fuel entering a high-pressure fuel system is ensured, and continuous and reliable work of parts such as a high-pressure oil pump and a fuel injector is protected. Because modern high pressure common rail diesel engine, along with stricter emission requirement, the granule filtration in to the diesel oil and the separation of water droplet are constantly increasing, especially longer life's the proposition, will appear when the solid particle that appears on the filter paper surface piles up in a large number, can greatly reduce water separating function, and the moisture that does not completely separate can pass through filter paper and reentrant engine inside, can cause wearing and tearing to other metal parts, and the harm is bigger.

SUMMERY OF THE UTILITY MODEL

Based on the problem, the utility model aims at providing an integrated multiple stage filtration's fuel filter can carry out multiple stage filtration to the fuel, reduces the injury to the engine.

In order to overcome the deficiency of the prior art, the utility model provides a technical scheme is:

an integrated multi-stage filtering fuel filter comprises a filter tank, a filter element assembly arranged in the filter tank, and a filter base arranged at the upper end of the filter tank, wherein the oil inlet end of the filter base is communicated with the oil inlet of the filter element assembly, the oil outlet of the filter element assembly is communicated with the oil outlet end of the filter base, the filter element assembly comprises an upper end cover, a lower end cover, a second-stage filter element arranged between the upper end cover and the lower end cover, and a central tube arranged in the middle of the second-stage filter element, the oil inlet and the oil outlet are arranged on the upper end cover, the upper end cover comprises an upper end cover body and an oil guide tube arranged at the lower end of the upper end cover body and extending to the lower end cover, the oil guide tube is communicated with the oil inlet, the central tube is communicated with the oil outlet, an oil inlet communicated with the oil guide tube is arranged on the lower end, the first-stage filter element is communicated with the second-stage filter element.

In some embodiments, the lower end cap includes a lower end cap body, a circle of first boss disposed at the lower end of the lower end cap body, a plurality of ribs disposed circumferentially on the first boss, and a hook disposed at an end of the rib, and the hook is engaged with the buckle to limit the primary filter element in the first boss.

In some embodiments, the fastener includes a fastening disc, a circular truncated cone disposed in the middle of the fastening disc, and a fastening groove disposed in the circumferential direction of the fastening disc and matched with the hook, and a side surface of the circular truncated cone abuts against the primary filter element.

In some embodiments, the snap plate has a plurality of openings therein.

In some of the embodiments, the lower end cover upper end is equipped with the round filter core spacing groove that is used for installing the second grade filter core, be equipped with a plurality of perpendicular muscle of putting on the strain jar inner wall with lower end cover periphery clearance fit.

In some embodiments, the filter base is in threaded connection with the filter tank, a second boss is circumferentially arranged at the upper end of the upper end cover body, the lower end face of the second boss is abutted to the upper end face of the filter tank, a support table is arranged in the middle of the upper end cover body, the upper end face of the support table is abutted to the inner top face of the filter base, the second boss is connected with the support table through a plurality of connecting ribs, the side wall of the support table is provided with the oil inlet, and the top of the support table is provided with the oil outlet.

In some embodiments, a plurality of support blocks are circumferentially arranged on the lower end surface of the second boss, and the support blocks abut against the inner wall of the canister.

In some embodiments, the upper end cap body is circumferentially provided with a ring of groove, and a sealing gasket is arranged in the groove to abut against the inner wall of the canister.

In some embodiments, a plurality of support ribs are arranged on the inner wall of the oil outlet, a check valve assembly is arranged in the oil outlet of the filter base, and the support ribs are abutted to a valve seat of the check valve assembly.

In some of these embodiments, the filter jar includes can body and lower cup in the detachable connection, the filter element subassembly sets up in the upper tank body, be equipped with heater, water level sensor in the cup down.

Compared with the prior art, the utility model has the advantages that:

1. the filter integrates two-stage filtration, wherein the first-stage filtration is used for rough filtration and water drop gathering, and the second-stage filtration is used for fine filtration, so that the service life of the filter is prolonged, and the damage of impurities in fuel oil to an engine is reduced;

2. the filter element and the filter tank are matched, so that the filter element is convenient to replace and maintain;

3. the structure that the lower end cover is matched with the buckle can limit the movement of the primary filter element and ensure the primary filter element to play a role;

4. the bottom of the buckle is provided with a plurality of holes, so that the flow resistance of fuel oil can be reduced, and smooth oil supply of a filter system is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of a fuel filter integrated with multi-stage filtration according to the present invention;

fig. 2 is a schematic structural view of an upper end cap in an embodiment of the present invention;

fig. 3 is a partial sectional view of an upper end cap according to an embodiment of the present invention;

FIG. 4 is a schematic view of the upper end cap and the filter base of the embodiment of the present invention;

fig. 5 is a schematic structural view of a lower end cap in an embodiment of the present invention;

fig. 6 is a schematic structural view of the buckle in the embodiment of the present invention;

FIG. 7 is a schematic view of the filter base and the canister according to an embodiment of the present invention;

fig. 8 is a working schematic diagram of the embodiment of the present invention;

wherein:

1. a filter tank; 1-1, putting the pot body; 1-1a, vertically arranging ribs; 1-1b, cambered surface; 1-2, lower cup body;

2. a filter base; 2-1, oil inlet end; 2-2, oil outlet end; 2-3, a platform surface; 2-4, positioning a plane;

3. an upper end cover; 3-1, an upper end cover body; 3-2, oil guide pipe; 3-3, a second boss; 3-4, supporting the table; 3-5, connecting ribs; 3-6, lower end surface; 3-7, supporting blocks; 3-8, an oil inlet; 3-9, oil outlet; 3-10 parts of support ribs; 3-11, a groove; 3-12, a limiting groove; 3-13 parts of vent holes; 3-14, a vent plug mounting hole;

4. a lower end cover; 4-1, a lower end cover body; 4-2, a first boss; 4-3, convex ribs; 4-4, clamping hook; 4-5, oil inlet holes; 4-6, a filter element limiting groove;

5. a secondary filter element;

6. a central tube;

7. a first-stage filter element;

8. buckling; 8-1, a buckle disc; 8-2, buckling grooves; 8-3, a circular truncated cone; 8-4, opening holes;

9. a heater;

10. a water level sensor;

11. sealing and locking;

12. a sealing gasket;

13. a first seal ring;

14. a second seal ring;

15. compounding glue;

16. a one-way valve assembly;

17. a back-up check valve assembly.

Detailed Description

The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present invention. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments.

Referring to fig. 1, for the structural schematic diagram of the embodiment of the present invention, an integrated multi-stage filtration fuel filter is provided, which includes a filter tank 1, a filter element assembly disposed in the filter tank 1, and a filter base 2 installed on the upper end of the filter tank 1, an oil inlet 2-1 of the filter base 2 is communicated to an oil inlet 3-8 of the filter element assembly, an oil outlet 3-9 of the filter element assembly is communicated to an oil outlet of the filter base 2, the filter element assembly includes an upper end cover 3, a lower end cover 4, a secondary filter element 5 disposed between the upper end cover 3 and the lower end cover 4 for fine filtration, and a central tube 6 disposed in the middle of the secondary filter element 5, and the oil inlet 3-8 and the oil outlet 3-9 are disposed on the upper end cover 3.

Specifically, referring to fig. 2-4, the upper end cap 3 includes an upper end cap body 3-1 and an oil conduit 3-2 disposed at the lower end of the upper end cap body 3-1 and extending to the lower end cap 4, the upper end of the oil conduit 3-2 is communicated to an oil inlet 3-8, the lower end of the oil conduit 3-2 is fixed on the lower end cap 4 through a compound glue 15, the lower end cap 4 is provided with an oil inlet 3-8 communicated to the oil conduit 3-2, the central tube 6 is communicated to an oil outlet 3-9, the lower end cap 4 is provided with an oil inlet 4-5 communicated to the oil conduit 3-2, the lower end of the lower end cap 4 is provided with a primary filter element 7, and the primary filter element 7 is communicated with a. Therefore, the fuel enters the oil inlet 3-8 of the filter element assembly through the oil inlet end 2-1 of the filter base 2, then enters the oil guide pipe 3-2, then reaches the first-stage filter element 7 through the oil inlet hole 4-5 of the lower end cover 4, is filtered by the second-stage filter element 5 after being filtered by the first-stage filter element 7, then enters the central pipe 6, and is discharged to the oil outlet end 2-2 of the filter base 2 through the oil outlet 3-9.

Referring to fig. 5, the lower end cover 4 comprises a lower end cover body 4-1, a circle of first bosses 4-2 arranged at the lower end of the lower end cover body 4-1, a plurality of convex ribs 4-3 arranged on the circumference of the first bosses 4-2, and hooks 4-4 arranged at the ends of the convex ribs 4-3, wherein the plurality of hooks 4-4 are matched with the buckles 8 to limit the primary filter element 5 in the first bosses 4-2.

Specifically, referring to fig. 6, the buckle 8 comprises a buckle disc 8-1, a circular truncated cone 8-3 arranged in the middle of the buckle disc 8-1, and a buckle groove 8-2 arranged on the periphery of the buckle disc 8-1 and matched with the buckle hook 4-4, wherein the outer diameter of the circular truncated cone 8-3 is matched with the inner diameter of the primary filter element 7, so that the side surface of the circular truncated cone 8-3 is abutted against the primary filter element 7 to limit the primary filter element 7 in the first boss 4-2.

In order to reduce the flow resistance of the fuel filtered by the primary filter element 7, a plurality of openings 8-4 are formed in the buckle disc 8-1.

The upper end of the lower end cover 4 is provided with a circle of filter element limiting grooves 4-6 for mounting the secondary filter element 5, the inner wall of the filter tank 1 is provided with a plurality of vertical ribs 1-1a which are in clearance fit with the periphery of the lower end cover 4, and the single-side clearance between the inner diameter of the vertical ribs 1-1a and the outer diameter of the lower end cover 4 is less than 1.5mm, so that excessive deflection during mounting of the secondary filter element 5 can be prevented.

In the embodiment, the filter base 2 is in threaded connection with the filter tank 1, the upper end cover 3 is circumferentially provided with a second boss 3-3, the lower end surface 3-6 of the second boss 3-3 is abutted against the upper end surface of the filter tank 1, the middle part of the upper end cover 3 body is provided with a support table 3-4, the upper end surface of the support table 3-4 is abutted against the inner top surface of the filter base 2, the second boss 3-3 is connected with the support table 3-4 through a plurality of connecting ribs 3-5, the side wall of the support table 3-4 is provided with crossed through holes as oil inlets 3-8, and the top of the support table 3-4 is provided with a plurality of openings as oil outlets 3-9. The support table 3-4 is provided with a circle of limiting grooves 3-12, elastic sealing lock catches 11 are arranged in the limiting grooves 3-12, meanwhile, the top in the filter base 2 is provided with a platform surface 2-3 to be matched with the sealing lock catches 11 in a sealing mode, the support table 3-4 and the sealing lock catches 11 are provided with a certain height difference, the compression amount of the sealing lock catches 11 can be guaranteed, the sealing lock catches 11 are prevented from being compressed excessively when the filter tank 1 and the filter base 2 are screwed down, and internal short circuit is prevented. The sealing lock 11 can be made of rubber or silicon rubber.

The second boss 3-3 can be arranged as a whole or more than two fan-shaped structures, and filters with different structures can be distinguished through notches with different structures. The side part of the support table 3-4 is provided with an exhaust hole 3-13 for exhausting air in the filter element, an exhaust plug is arranged in the exhaust hole 3-13, the exhaust plug is a copper powder sintered product or a plastic porous product, and correspondingly, the second boss 3-3 is provided with a notch so as to facilitate the installation of the exhaust plug. In order to ensure the maximum design area of the filter paper of the secondary filter element 5, the vent plug mounting holes 3-14 and the vent holes 3-13 are in eccentric design, so that the height of the designed vent plug and the height of a product without the vent plug can be kept consistent.

In order to further optimize the implementation effect of the utility model, a plurality of supporting blocks 3-7 are circumferentially arranged on the lower end surface of the second boss 3-3, and the supporting blocks 3-7 are abutted against the inner wall of the filtering tank 1, so that the secondary filter element 5 is circumferentially fixed in the filtering tank 1.

A circle of grooves 3-11 are formed in the upper end cover body 3-1 in the circumferential direction, sealing gaskets 12 are arranged in the grooves 3-11 and are abutted to the inner wall of the filter tank 1, the sealing performance between the upper end cover 3 and the inner wall of the filter tank 1 can be further guaranteed by the aid of the sealing gaskets 12, and the oil inlets 3-8 and the oil outlets 3-9 in the upper end cover 3 can work normally. A first seal ring 13 is provided between the filter base 2 and the canister 1 to improve the sealing between the filter base 2 and the canister 1.

In order to judge whether a filter element is installed in the filter tank 1, an arc surface 1-1b is arranged below the outer side surface of the filter tank 1, a positioning plane 2-4 is arranged at the lower end of the inner thread arranged in the filter base 2, the filter base 2 is screwed on the filter tank 1, and when the arc surface 1-1b of the filter tank 1 is intersected with the positioning plane 2-4 of the filter base 2, the filter tank 1 is considered to be not assembled with the filter element, so that the installation is prompted.

The inner wall of the oil outlet 3-9 is provided with a plurality of support ribs 3-10, the oil outlet end 2-2 of the filter base 2 is internally provided with a check valve component 16, the support ribs 3-10 are abutted against a valve seat of the check valve component 16, so that the valve seat is protected, and the phenomenon that the pressure falls off after being reversely pushed to cause the loss of the oil pumping function of the hand pump and the loss of the diesel oil pressure maintaining function in a pipeline after the engine is stopped is avoided.

In this example, the filter tank 1 comprises an upper tank body 1-1 and a lower cup body 1-2 which are detachably connected, a filter element assembly is arranged in the upper tank body 1-1, a heater 9, a water level sensor 10, a water drain valve and other parts are arranged in the lower cup body 1-2, and the upper tank body 1-1 is in threaded connection with the lower cup body 1-2. A second sealing ring 14 is arranged between the upper tank body 1-1 and the lower cup body 1-2 to improve the matching sealing performance between the upper tank body 1-1 and the lower cup body 1-2.

The filter base 1 is also internally provided with a spare one-way valve component 17 and a corresponding oil duct, and has the functions that in order to ensure that the filter does not work for a long time, oil is pumped and pressurized by pumping oil by a hand to the filter and an oil pipe of the whole vehicle, and the oil duct of the whole vehicle is filled with fuel oil, so that the engine can be started smoothly.

Referring to fig. 8, for the working principle diagram of the present invention, when the filter is installed or replaced for the first time, the fuel in the fuel tank enters the fuel injection device (FIE) after being filtered by the first-stage filter element and the second-stage filter element.

The utility model discloses working process does: fuel enters from an oil inlet end 2-1 of the filter base 2, enters an oil guide pipe 3-2 after passing through an oil inlet 3-8 of the upper end cover 3, then passes through an oil inlet 4-5 on the lower end cover 4, enters a secondary filter element 5 for fine filtration after being subjected to coarse filtration and water drop collection by a primary filter element 7, and then enters an oil outlet 3-9 of the upper end cover 3 through a central pipe 6, passes through a one-way valve assembly 16, and finally enters an internal system of the engine through an oil outlet end 2-2 of the filter base 2.

The above examples are only for illustrating the technical conception and the features of the present invention, and the purpose thereof is to enable one skilled in the art to understand the contents of the present invention and to implement the present invention, which should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (10)

1. An integrated multi-stage filtering fuel filter comprises a filter tank (1), a filter element assembly arranged in the filter tank (1) and a filter base (2) arranged at the upper end of the filter tank (1), the oil inlet end (2-1) of the filter base (2) is communicated with the oil inlet (3-8) of the filter core assembly, an oil outlet (3-9) of the filter core assembly is communicated to an oil outlet end (2-2) of the filter base (2), the filter element component comprises an upper end cover (3), a lower end cover (4), a secondary filter element (5) arranged between the upper end cover (3) and the lower end cover (4), and a central tube (6) arranged in the middle of the secondary filter element (5), the oil inlet (3-8) and the oil outlet (3-9) are arranged on the upper end cover (3), and the oil-saving oil tank is characterized in that: the upper end cover (3) comprises an upper end cover body (3-1) and an oil guide pipe (3-2) which is arranged at the lower end of the upper end cover body (3-1) and extends to the lower end cover (4), the oil guide pipe (3-2) is communicated with the oil inlet (3-8), the central pipe (6) is communicated with the oil outlet (3-9), an oil inlet hole (4-5) communicated with the oil guide pipe (3-2) is formed in the lower end cover (4), a primary filter element (7) is installed at the lower end of the lower end cover (4), and the primary filter element (7) is communicated with the secondary filter element (5).

2. The integrated multi-stage filtration fuel filter of claim 1 wherein: the lower end cover (4) comprises a lower end cover body (4-1), a circle of first bosses (4-2) arranged at the lower end of the lower end cover body (4-1), a plurality of convex ribs (4-3) arranged on the circumferential direction of the first bosses (4-2), and clamping hooks (4-4) arranged at the end parts of the convex ribs (4-3), wherein the clamping hooks (4-4) are matched with the clamping buckles (8) to limit the primary filter element (7) in the first bosses (4-2).

3. The integrated multi-stage filtration fuel filter of claim 2 wherein: the buckle (8) comprises a buckle disc (8-1), a round table (8-3) arranged in the middle of the buckle disc (8-1) and a buckle groove (8-2) arranged in the circumferential direction of the buckle disc (8-1) and matched with the buckle hook (4-4), and the side face of the round table (8-3) is abutted to the primary filter element (7).

4. The integrated multi-stage filtration fuel filter of claim 3 wherein: the buckle disc (8-1) is provided with a plurality of openings (8-4).

5. The integrated multi-stage filtration fuel filter of claim 2 wherein: the filter tank is characterized in that a circle of filter element limiting groove (4-6) used for installing a secondary filter element (5) is formed in the upper end of the lower end cover (4), and a plurality of vertical ribs (1-1a) are arranged on the inner wall of the filter tank (1) and are in clearance fit with the periphery of the lower end cover (4).

6. The integrated multi-stage filtration fuel filter of claim 1 wherein: the filter base (2) is in threaded connection with the filter tank (1), a second boss (3-3) is arranged on the upper end of the upper end cover body (3-1) in the circumferential direction, the lower end surface (3-6) of the second boss (3-3) is abutted against the upper end surface of the filter tank (1), a supporting table (3-4) is arranged in the middle of the upper end cover body (3-1), the upper end surface of the supporting table (3-4) is abutted against the inner top surface of the filter base (2), the second boss (3-3) is connected with the support platform (3-4) through a plurality of connecting ribs (3-5), the side wall of the supporting platform (3-4) is provided with the oil inlet (3-8), and the top of the supporting platform (3-4) is provided with the oil outlet (3-9).

7. The integrated multi-stage filtration fuel filter of claim 6 wherein: a plurality of supporting blocks (3-7) are arranged on the lower end face of the second boss (3-3) in the circumferential direction, and the supporting blocks (3-7) are abutted to the inner wall of the filter tank (1).

8. The integrated multi-stage filtration fuel filter of claim 6 wherein: the upper end cover body (3-1) is circumferentially provided with a circle of grooves (3-11), and sealing gaskets (12) are arranged in the grooves (3-11) and are abutted to the inner wall of the filter tank (1).

9. The integrated multi-stage filtration fuel filter of claim 6 wherein: a plurality of support ribs (3-10) are arranged on the inner wall of the oil outlet (3-9), a check valve assembly (16) is arranged in the oil outlet end (2-2) of the filter base (2), and the support ribs (3-10) are abutted to a valve seat of the check valve assembly (16).

10. The integrated multi-stage filtration fuel filter of claim 1 wherein: the filter tank (1) comprises an upper tank body (1-1) and a lower tank body (1-2) which are detachably connected, the filter element assembly is arranged in the upper tank body (1-1), and a heater (9) and a water level sensor (10) are arranged in the lower tank body (1-2).

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