A fuel filter with a multi-layer composite screen structure

Abstract

This utility model provides a fuel filter with a multi-layer composite filter structure, belonging to the technical field of fuel filter technology. The multi-layer composite filter includes a filter body, with a sealing cap threadedly connected to the inner wall of the filter body, and an oil inlet pipe fixedly connected to the outer wall of the sealing cap. To improve the convenience of disassembling and replacing multiple filters outside the filter and to achieve independent disassembly and use of a single filter, the sealing cap is rotated. Under the threaded connection of the first outer and first inner spirals, the sealing cap is disassembled from the filter. With the engaging connection between the connecting post and the mounting block, the multiple filters are simultaneously pulled out of the filter. Rotating the first filter, through the threaded connection of the second outer and second inner spirals, allows for disassembly and assembly between the filter and the connecting post, achieving efficient disassembly and assembly of the internal filters.

Description

Technical Field

[0001] This application relates to the field of fuel filter technology, and more particularly to a fuel filter with a multi-layer composite filter structure. Background Technology

[0002] There are three types of fuel filters: diesel filters, gasoline filters, and natural gas filters. The function of a fuel filter is to prevent particulate matter, water, and impurities in the fuel, ensuring that the precision components of the fuel system are protected from wear and other damage.

[0003] While existing fuel filters can perform multiple filtration operations in daily use, the multiple filters are often removed and replaced as a whole, rather than individually. Furthermore, the connection between the multiple filters and the sealing cap is not very effective, which reduces the efficiency of removing and installing the filters inside the filter. Utility Model Content

[0004] This application provides a fuel filter with a multi-layer composite filter structure to solve the problems that when using multiple filters, the multiple filters are often disassembled inside the filter and replaced as a whole. Individual disassembly and replacement of the multiple filters is not effective, and the engagement between the multiple filters and the sealing cover is not good.

[0005] This application provides a fuel filter with a multi-layer composite filter structure, including a filter body. A sealing cap is threadedly connected to the inner wall of the filter body, and an oil inlet pipe is fixedly connected to the outer wall of the sealing cap. An oil outlet pipe is fixedly connected to one end of the filter body. An mounting block is fixedly connected to the outer wall of the sealing cap. A connecting post is detachably connected to the inner wall of the mounting block. A first filter screen is detachably connected to one end of the connecting post. A second filter screen is detachably connected to one side of the first filter screen. A third filter screen located on one side of the second filter screen is detachably connected to one side of the second filter screen. A limiting block that fits against the surface of the third filter screen is fixedly connected to the inner wall of the filter body.

[0006] Preferably, the outer wall of the sealing cap is provided with a first outer spiral, and the inner wall of the filter body is provided with a first inner spiral that is threadedly connected to the outer wall of the first outer spiral.

[0007] Preferably, the inner wall of the mounting block is provided with a slot at the connection point between the mounting block and the connecting column, and two sets of mounting blocks and connecting columns are provided, with the positions of the two sets of mounting blocks and connecting columns being symmetrical about the central axis of the sealing cover.

[0008] Preferably, the outer wall of the mounting block is provided with a nut, and the inner wall of the nut is threaded with a bolt that is slidably connected to the outer wall of the connecting column.

[0009] Preferably, a groove is provided at the connection point between the outer wall of the connecting column and the bolt.

[0010] Preferably, the inner wall of the connecting column is provided with a second inner spiral, and the outer wall of the first filter screen is provided with a second outer spiral that is threadedly connected to the inner wall of the second inner spiral.

[0011] Preferably, the diameters of the first filter screen, the second filter screen, and the third filter screen are arranged in descending order. Beneficial effects

[0012] Considering that existing fuel filters can perform multiple filtration operations in daily use, the multiple filters are often removed and replaced as a whole, which is not effective for individual replacement of multiple filters. In addition, the connection between the multiple filters and the sealing cap is not good, which reduces the efficiency of removing and installing the filters inside the filter.

[0013] When multiple filters need to be disassembled and replaced, in order to improve the convenience of disassembling and replacing the filters outside the filter and the effect of independent disassembly and use of a single filter, the sealing cover is rotated. Under the threaded connection of the first outer screw and the first inner screw, the sealing cover is disassembled from the filter. Under the engaging connection of the connecting post and the mounting block, the multiple filters are simultaneously pulled out from the filter. Then, the first filter is rotated, and under the threaded connection of the second outer screw and the second inner screw, the filter is disassembled from the connecting post. This achieves the effect of efficient disassembly and use of the filters inside the filter.

[0014] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of a fuel filter with a multi-layer composite filter screen according to the present invention.

[0017] Figure 2 This is a schematic diagram of the overall structure of a multi-layer composite filter structure fuel filter according to this utility model from another perspective.

[0018] Figure 3 This is a schematic diagram of the sealing cover of a fuel filter with a multi-layer composite filter structure according to this utility model, in the disassembled state.

[0019] Figure 4 This is a schematic diagram showing the positional distribution of the second outer spiral and the second inner spiral of a multi-layer composite filter structure fuel filter according to this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Filter body; 2. Sealing cap; 3. Oil inlet pipe; 4. Oil outlet pipe; 5. First outer spiral; 6. First inner spiral; 7. Mounting block; 8. Connecting column; 9. First filter screen; 10. Second filter screen; 11. Third filter screen; 12. Limiting block; 13. Slot; 14. Nut; 15. Bolt; 16. Slot; 17. Second outer spiral; 18. Second inner spiral. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0024] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by fasteners, such as a connection fixed by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0028] This utility model provides, for example Figure 1-4 The fuel filter shown is a multi-layer composite filter structure, including a filter body 1, a sealing cap 2 threadedly connected to the inner wall of the filter body 1, an oil inlet pipe 3 fixedly connected to the outer wall of the sealing cap 2, an oil outlet pipe 4 fixedly connected to one end of the filter body 1, an mounting block 7 fixedly connected to the outer wall of the sealing cap 2, a connecting post 8 detachably connected to the inner wall of the mounting block 7, a first filter screen 9 detachably connected to one end of the connecting post 8, a second filter screen 10 detachably connected to one side of the first filter screen 9, a third filter screen 11 detachably connected to one side of the second filter screen 10, and a limiting block 12 fixedly connected to the inner wall of the filter body 1, which is in contact with the surface of the third filter screen 11.

[0029] The outer wall of the sealing cap 2 is provided with a first outer spiral 5, and the inner wall of the filter body 1 is provided with a first inner spiral 6 that is threadedly connected to the outer wall of the first outer spiral 5.

[0030] The arrangement of the first outer spiral 5 and the first inner spiral 6 facilitates the removal and disassembly of multiple filter screens from inside the filter.

[0031] The inner wall of the mounting block 7 is provided with a slot 13 at the connection point between it and the connecting column 8. There are two sets of mounting blocks 7 and connecting columns 8. The positions of the two sets of mounting blocks 7 and connecting columns 8 are symmetrical about the central axis of the sealing cover 2.

[0032] This facilitates the pre-installation and installation of the connecting post 8 through the slot 13.

[0033] The outer wall of the mounting block 7 is provided with a nut 14, and the inner wall of the nut 14 is threaded with a bolt 15 that is slidably connected to the outer wall of the connecting column 8.

[0034] The use of nuts 14 and bolts 15 facilitates easy disassembly and assembly of the connecting column 8.

[0035] Among them, the outer wall of the connecting column 8 and the connection part of the bolt 15 are provided with a groove 16.

[0036] The design of the slot 16 helps to improve the stability of the connecting post 8 during engagement and fixation.

[0037] The inner wall of the connecting column 8 is provided with a second inner spiral 18, and the outer wall of the first filter screen 9 is provided with a second outer spiral 17 that is threadedly connected to the inner wall of the second inner spiral 18.

[0038] The arrangement of the second inner spiral 18 and the second outer spiral 17 allows for the individual disassembly and assembly of multiple filters.

[0039] The diameters of the first filter screen 9, the second filter screen 10, and the third filter screen 11 are arranged in descending order.

[0040] The arrangement of the openings on the surfaces of the first filter screen 9, the second filter screen 10, and the third filter screen 11 in a decreasing manner improves the effect of multiple filtration in the filter.

[0041] Working principle: When using this multi-layer composite filter structure fuel filter, to improve the convenience of removing and replacing multiple filters outside the filter and to achieve the effect of independent removal and use of a single filter, the sealing cover 2 is rotated. Under the threaded connection of the first outer screw 5 and the first inner screw 6, the sealing cover 2 is disassembled from the filter. Under the engaging connection of the connecting post 8 and the mounting block 7, the multiple filters are simultaneously pulled out from the filter. Then, the first filter 9 is rotated, and under the threaded connection of the second outer screw 17 and the second inner screw 18, the filter is removed from the connecting post 8, achieving the effect of efficient removal and use of the filter inside the filter.

[0042] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A fuel filter with a multi-layer composite filter structure, comprising a filter body (1), characterized in that: The filter body (1) is threaded with a sealing cap (2), and the outer wall of the sealing cap (2) is fixedly connected with an oil inlet pipe (3). One end of the filter body (1) is fixedly connected with an oil outlet pipe (4). The outer wall of the sealing cap (2) is fixedly connected with an installation block (7). The inner wall of the installation block (7) is detachably connected with a connecting column (8). One end of the connecting column (8) is detachably connected with a first filter screen (9). One side of the first filter screen (9) is detachably connected with a second filter screen (10). One side of the second filter screen (10) is detachably connected with a third filter screen (11) located on one side of the second filter screen (10). The inner wall of the filter body (1) is fixedly connected with a limiting block (12) that fits against the surface of the third filter screen (11).

2. The fuel filter with a multi-layer composite filter structure according to claim 1, characterized in that: The outer wall of the sealing cap (2) is provided with a first outer spiral (5), and the inner wall of the filter body (1) is provided with a first inner spiral (6) that is threadedly connected to the outer wall of the first outer spiral (5).

3. A fuel filter with a multi-layer composite filter structure according to claim 1, characterized in that: The inner wall of the mounting block (7) is provided with a slot (13) at the connection part with the connecting column (8). There are two sets of the mounting block (7) and the connecting column (8). The positions of the two sets of mounting blocks (7) and connecting columns (8) are symmetrical about the central axis of the sealing cover (2).

4. A fuel filter with a multi-layer composite filter structure according to claim 1, characterized in that: The outer wall of the mounting block (7) is provided with a nut (14), and the inner wall of the nut (14) is threaded with a bolt (15) that is slidably connected to the outer wall of the connecting column (8).

5. A fuel filter with a multi-layer composite filter structure according to claim 4, characterized in that: The outer wall of the connecting column (8) and the connection part of the bolt (15) are provided with a groove (16).

6. A fuel filter with a multi-layer composite filter structure according to claim 1, characterized in that: The inner wall of the connecting column (8) is provided with a second inner spiral (18), and the outer wall of the first filter screen (9) is provided with a second outer spiral (17) that is threadedly connected to the inner wall of the second inner spiral (18).

7. A fuel filter with a multi-layer composite filter structure according to claim 1, characterized in that: The diameters of the first filter screen (9), the second filter screen (10), and the third filter screen (11) are arranged in descending order.

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