Fuel filter

Abstract

The utility model relates to the technical field of filters and discloses a fuel filter which comprises an outer shell, a filter element with a sealed bottom end is arranged in the outer shell, a cover body is arranged at the top end of the outer shell, the fuel filter further comprises a dispersing part and an annular filter strip, the dispersing part is arranged at the upper end of the interior of the filter element, and the annular filter strip is arranged in the outer shell. The dispersing part is used for dispersing fuel oil introduced into the filter element to each surface of the inner wall of the filter element, and the upper end surface of the annular filter strip is connected with a telescopic connecting part; after to-be-filtered fuel oil is introduced, part of the to-be-filtered fuel oil directly falls into the filter element, and the other part of the to-be-filtered fuel oil is guided to the leakage holes through the guide strips and then flows down from all the surfaces of the inner wall of the filter element, so that the fuel oil is prevented from being concentrated in a certain area to be filtered, and the fuel oil is uniformly distributed through the dispersing part; the impurities are relatively uniformly accumulated on each surface of the inner wall of the filter element, so that the situation that a local area loses efficacy in advance due to excessive bearing of the impurities is avoided, and the overall service life of the filter element is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a fuel filter. Background Art

[0002] The fuel filter is an important component in the internal combustion engine fuel system. Its main function is to remove impurities, moisture and contaminants from the fuel to ensure that the fuel supplied to the engine is clean and meets the quality requirements. This helps protect the injectors, fuel pumps and other fuel system components from wear or blockage, and ensures that the engine can run efficiently and stably.

[0003] In the actual application scenarios of current fuel filters, their working mode has obvious limitations. Usually, the fuel to be filtered will be directly transported into the filter element. However, this access method mostly adopts a single-point design, which means that the fuel only enters from a specific point inside the filter element. In this way, during the filtration process, the impurities carried by the fuel will quickly gather near the single-point entrance. Since the impurities continue to deposit in this local area, the filter element in this area will soon be excessively blocked by impurities, thereby greatly reducing the filtration efficiency of the filter element in this local area. In addition, this single-point access method also causes another serious problem, that is, the inner wall area of ​​the filter element cannot be efficiently and fully utilized. The inner wall of the filter element should serve as a large-area filtration interface, but because the fuel only enters from a single point, most of the inner wall of the filter element cannot be evenly contacted with the fuel, and only a limited area near the single-point entrance participates in the main filtration work. In this way, not only the overall filtration capacity of the filter element is greatly reduced, but also the service life of the filter element will be shortened due to local excessive use, which increases the use cost and maintenance frequency, and has an extremely adverse effect on the stable operation and long-term performance guarantee of the fuel filtration system. Utility Model Content

[0004] The utility model provides a fuel filter to solve the problem that most existing fuel filters have single-point access, so that a local area of ​​the inner wall of the filter element is blocked too quickly and the inner wall area of ​​the filter element cannot be fully utilized.

[0005] In order to achieve the above object, the utility model provides the following technical solution: a fuel filter, comprising an outer shell, a filter element with a bottom end blocked is arranged in the outer shell, and a cover is installed on the top of the outer shell, and also includes:

[0006] A dispersion member, which is disposed at the upper end of the filter element and is used to disperse the fuel entering the filter element to various surfaces of the inner wall of the filter element;

[0007] The annular filter strip is sleeved on the outer bottom end of the filter element, and the upper end surface of the annular filter strip is connected with a retractable connecting piece, and the connecting piece is rotatably connected to the cover body.

[0008] Preferably, the dispersion member includes a connected conical plate and a circular plate, the circular plate is fixed to the inner upper end of the filter element, the conical plate is arranged above the circular plate, and the conical plate and the circular plate are both provided with feed holes in the middle, the outer wall of the circular plate is provided with a plurality of leakage holes in a circular array near the edge, and a plurality of guide strips are provided in a circular array between the conical plate and the circular plate, and each of the guide strips corresponds to a leakage hole.

[0009] Preferably, the connecting member includes an annular slide bar and a telescopic rod, the telescopic rod is connected between the upper end surface of the annular filter strip and the annular slide bar, an annular slide groove is provided on the inner top of the cover body, and the annular slide bar is slidably matched with the annular slide groove.

[0010] Preferably, the filter element comprises a metal mesh layer, an adsorption layer and a fine filtration layer arranged from inside to outside.

[0011] Preferably, an embedded block is fixed at the bottom end of the filter element, a convex block is fixed at the inner bottom of the outer shell, an embedding groove is formed on the convex block, and the embedded block is inserted and matched in the embedding groove.

[0012] Preferably, an oil inlet pipe is connected to the middle of the top end of the cover body, and the oil inlet pipe is directly opposite to the feeding hole.

[0013] Preferably, an oil outlet pipe is connected to the lower end of the side wall of the outer shell, and the oil outlet pipe corresponds to the oil outlet hole on the outer shell and is located below the annular filter strip.

[0014] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0015] (1) Through the setting of the dispersion piece, after the fuel to be filtered is passed in, the fuel enters the feed hole on the conical plate, part of the fuel to be filtered falls directly into the filter element, and the other part of the fuel to be filtered is guided to the leakage hole through multiple guide strips, and then flows down from the inner wall of the filter element, avoiding the fuel from being concentrated in a certain area for filtration, thereby making full use of the filtration area of ​​the filter element, and the dispersion piece makes the fuel evenly distributed, and impurities accumulate relatively evenly on the inner wall of the filter element, so that there will be no premature failure of local areas due to excessive load of impurities, so that the overall service life of the filter element is extended. Secondly, because the fuel is dispersed to the inner wall of the filter element, the flow path of the fuel inside the filter element is more reasonable. This helps to ensure that impurities in the fuel are intercepted more comprehensively.

[0016] (2) Through the provision of the annular filter strip, after the fuel passes through the filter element, it can be filtered again through the annular filter strip. In addition, a connecting piece is provided so that the annular filter strip can be pulled up. When the annular filter strip is cleaned, this pulling design can easily separate the annular filter strip from the filter element, facilitating the subsequent cleaning and maintenance operations of the annular filter strip. Complex disassembly tools and processes are not required. In addition, in the process of pulling the annular filter strip out of the filter element, the annular filter strip can also clean the outer wall of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the explosion structure of the utility model;

[0019] Figure 2 This is the appearance diagram of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the utility model after the cover is removed;

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the outer shell of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the cover body of the utility model;

[0023] Figure 6 It is a schematic diagram of the split structure of the dispersed parts of the utility model;

[0024] Figure 7 It is a structural schematic diagram of the filter element and the annular filter strip of the utility model;

[0025] Figure 8 It is a structural schematic diagram of the outer shell of the utility model;

[0026] Fig. 9 It is a structural schematic diagram of the connecting piece of the utility model;

[0027] In the figure: 1. outer shell; 2. filter element; 21. metal mesh layer; 22. adsorption layer; 23. fine filter layer; 3. cover body; 4. oil inlet pipe; 5. oil outlet pipe; 6. dispersion member; 61. conical plate; 62. circular plate; 63. guide strip; 64. leakage hole; 65. feeding hole; 7. annular slide bar; 8. telescopic rod; 9. annular filter strip; 10. annular slide groove; 11. protrusion; 12. embedded block; 13. embedded groove. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] like Figure 1-Figure 8 As shown, a fuel filter comprises an outer shell 1, a filter element 2 with a bottom plugged therein is arranged inside the outer shell 1, the filter element 2 comprises a metal mesh layer 21, an adsorption layer 22 and a fine filtration layer 23 arranged from the inside to the outside, the metal mesh layer 21 has high strength and corrosion resistance, and mainly plays a role of preliminary filtration, intercepting larger impurity particles in the fuel, such as rust fragments, large particles of dust, sand, etc., the adsorption layer 22 is mainly activated carbon or other adsorption materials, and is mainly used to adsorb colloids, asphaltene, moisture and some small molecular organic impurities in the fuel, and the fine filtration layer 23 can be made of filter paper, microporous filter membrane or ceramic material, the filter paper is a specially treated fiber paper with a uniform microporous structure; the microporous filter membrane is usually made of polymer material, such as polytetrafluoroethylene (PTFE), whose pore size is very small, and can achieve high-precision filtration; the ceramic material has the characteristics of high temperature resistance and chemical corrosion resistance, and its internal microporous structure can In order to accurately filter impurities, the fine filter layer 23 is mainly responsible for removing tiny particle impurities in the fuel, such as tiny metal particles, carbon particles, unabsorbed tiny colloid particles, etc. The lower end of the side wall of the outer shell 1 is connected to an oil outlet pipe 5, and a cover body 3 is installed at the top of the outer shell 1. The cover body 3 can be installed in a screw-on connection manner, and a sealing ring is provided at the connection. The middle of the top of the cover body 3 is connected to an oil inlet pipe 4, and also includes a dispersion member 6. The dispersion member 6 is arranged at the inner upper end of the filter element 2, and the dispersion member 6 is used to disperse the fuel entering the filter element 2 to the various surfaces of the inner wall of the filter element 2, so that the fuel can contact the filter element 2 more evenly, and the entire inner surface of the filter element 2 can participate in the filtering work. The annular filter strip 9 is sleeved on the outer bottom end of the filter element 2, and the upper end surface of the annular filter strip 9 is connected with a retractable connector, which is rotatably connected to the cover body 3. The oil outlet pipe 5 corresponds to the oil outlet hole on the outer shell 1 and is located below the annular filter strip 9.

[0030] Among them, see Figure 6 As shown, the dispersion member 6 includes a connected conical plate 61 and a circular plate 62, the circular plate 62 is fixed to the inner upper end of the filter element 2, the conical plate 61 is arranged above the circular plate 62, and a feed hole 65 is opened in the middle of the conical plate 61 and the circular plate 62, the oil inlet pipe 4 is directly opposite to the feed hole 65, and a plurality of leakage holes 64 are opened in a circular array near the edge of the outer wall of the circular plate 62, and a plurality of guide strips 63 are arranged in a circular array between the conical plate 61 and the circular plate 62, and a guide groove is provided on the upper end surface of the guide strip 63, and each guide strip 63 corresponds to a leakage hole 64 to guide the fuel to the leakage hole 64.

[0031] Through the above, when in use, the fuel to be filtered is introduced from the fuel inlet pipe 4, and the fuel to be filtered enters the feed hole 65 on the conical plate 61. Part of the fuel to be filtered directly falls into the filter element 2, and the other part of the fuel to be filtered is guided to the leakage hole 64 through a plurality of guide strips 63 with guide grooves, and then flows down from the inner wall of the filter element 2, avoiding the fuel from being concentrated in a certain area for filtering, thereby making full use of the filtering area of ​​the filter element 2, and the dispersion member 6 makes the fuel evenly distributed, and the impurities accumulate relatively evenly on the inner wall of the filter element 2, so that there will be no premature failure of the local area due to excessive load of impurities, so that the overall service life of the filter element 2 is extended, and secondly, because the fuel is dispersed to the inner wall of the filter element 2, the flow path of the fuel inside the filter element 2 is more reasonable. This helps to ensure that the impurities in the fuel are intercepted more comprehensively.

[0032] See also Figure 4 as well as Figure 7-Figure 8 As shown, an insert 12 is fixed to the bottom end of the filter element 2, and a protrusion 11 is fixed to the inner bottom of the outer shell 1. The protrusion 11 is provided with an insert groove 13, and the insert 12 is inserted into the insert groove 13. When installing the filter element 2, the insert 12 can be inserted into the insert groove 13 on the protrusion 11, which is more convenient.

[0033] In addition, see Figure 1 As shown, the fuel filter also includes an annular filter strip 9, which is designed for fine filtering and can remove very small impurity particles in the fuel, and the annular filter strip 9 is sleeved on the outer bottom end of the filter element 2, and the upper end surface of the annular filter strip 9 is connected with a retractable connecting piece, which is rotatably connected to the cover body 3, and the oil outlet pipe 5 is located below the annular filter strip 9 corresponding to the oil outlet hole on the outer shell 1.

[0034] See also Figure 1 , Figure 4 , Figure 5 and Fig. 9 As shown, the connecting piece includes an annular slide bar 7 and a telescopic rod 8. The telescopic rod 8 is connected between the upper end surface of the annular filter bar 9 and the annular slide bar 7. An annular slide groove 10 is opened on the inner top of the cover body 3, and the annular slide bar 7 is slidably matched with the annular slide groove 10.

[0035] Through the above, the fuel filtered by the filter element 2 enters the outside of the filter element 2 and can be filtered again by the annular filter strip 9. The filtered fuel is discharged from the oil outlet pipe 5.

[0036] Among them, when the cover body 3 is rotated to be installed, since the annular slide bar 7 slides in the annular slide groove 10, the stability of the annular filter strip 9 can be ensured when the cover body 3 is rotated, and the annular filter strip 9 can be pulled up by the telescopic rod 8 by pulling up the cover body 3, and then the annular filter strip 9 is separated from the filter element 2, so that after the filtering device is used for a long time, impurities will accumulate on the annular filter strip 9, which needs to be cleaned regularly, and this lifting design can easily separate the annular filter strip 9 from the filter element 2, which is convenient for the subsequent cleaning and maintenance operations of the annular filter strip 9 separately, and does not require complicated disassembly tools and processes; and in the process of pulling the annular filter strip 9 out of the filter element 2, the annular filter strip 9 will wipe the outer wall of the filter element 2 by the way.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fuel filter, comprising an outer shell (1), wherein a filter element (2) with a bottom end blocked is arranged in the outer shell (1), and a cover (3) is installed at the top end of the outer shell (1), characterized in that: Also included are: A dispersion member (6), the dispersion member (6) being arranged at the inner upper end of the filter element (2), and the dispersion member (6) being used to disperse the fuel entering the filter element (2) onto various surfaces of the inner wall of the filter element (2); An annular filter strip (9) is sleeved on the outer bottom end of the filter element (2), and the upper end surface of the annular filter strip (9) is connected to a retractable connecting piece, and the connecting piece is rotatably connected to the cover body (3).

2. A fuel filter according to claim 1, characterized in that: The dispersion member (6) comprises a connected conical plate (61) and a circular plate (62), the circular plate (62) being fixed to the inner upper end of the filter element (2), the conical plate (61) being arranged above the circular plate (62), and a feed hole (65) being provided at the middle of each of the conical plate (61) and the circular plate (62), a plurality of leakage holes (64) being provided in an annular array near the edge of the outer wall of the circular plate (62), and a plurality of guide bars (63) being provided in an annular array between the conical plate (61) and the circular plate (62), each of the guide bars (63) corresponding to a leakage hole (64).

3. A fuel filter according to claim 1, characterized in that: The connecting member comprises an annular slide bar (7) and a telescopic rod (8), the telescopic rod (8) being connected between the upper end surface of the annular filter bar (9) and the annular slide bar (7), an annular slide groove (10) being provided at the inner top of the cover body (3), and the annular slide bar (7) being slidably matched in the annular slide groove (10).

4. A fuel filter according to claim 1, characterized in that: The filter element (2) comprises a metal mesh layer (21), an adsorption layer (22) and a fine filtration layer (23) arranged from the inside to the outside.

5. A fuel filter according to claim 1, characterized in that: An insert (12) is fixed to the bottom end of the filter element (2), a convex block (11) is fixed to the inner bottom of the outer shell (1), an insert groove (13) is formed on the convex block (11), and the insert block (12) is inserted and matched in the insert groove (13).

6. A fuel filter according to claim 2, characterized in that: An oil inlet pipe (4) is connected to the middle of the top end of the cover body (3), and the oil inlet pipe (4) is directly opposite to the feed hole (65).

7. A fuel filter according to claim 6, characterized in that: The lower end of the side wall of the outer shell (1) is connected to an oil outlet pipe (5), and the oil outlet pipe (5) corresponds to the oil outlet hole on the outer shell (1) and is located below the annular filter strip (9).

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