Fuel filter assembly

Abstract

The utility model discloses a fuel oil filter assembly which comprises a main cylinder body, an inlet cylinder and an outlet cylinder, the inlet cylinder and the outlet cylinder are arranged at the two ends of the main cylinder body, a plurality of hollowed-out supporting pieces and filter paper are arranged in the main cylinder body at intervals, and the filter paper is fixed between every two adjacent hollowed-out supporting pieces in an extruding mode. The inlet cylinder is in threaded connection with the main cylinder body, a diversion cylinder is arranged in the inlet cylinder, a plurality of diversion holes are formed in the side face of the diversion cylinder, a drainage plate is arranged at the outer end of the diversion cylinder, the outer end of the drainage plate protrudes outwards to form an outer conical surface, the inner end of the drainage plate protrudes outwards to form an inner conical surface, and the surface of the inner conical surface is concaved inwards to form a curved surface shape; and the inner conical surface extends into the main cylinder body and is close to the adjacent hollow supporting piece. According to the fuel filter assembly, the multi-layer filter paper is adopted for filtering impurities in fuel, the multi-stage filtering effect is achieved, in addition, the fuel can be dispersed and enter the fuel filter assembly when entering the fuel filter assembly, the better diffusion effect is achieved when the fuel enters the fuel filter assembly, and therefore the filtering effect is improved.

Description

Technical Field

[0001] This utility model relates to fuel filters, specifically to a fuel filter assembly. Background Technology

[0002] The fuel filter assembly is an important component of a car's fuel system. Its function is to filter impurities and particulate matter in the fuel, ensuring the normal operation of the fuel system.

[0003] Chinese patent CN215170468U discloses a self-heating fuel filter assembly, including a filter box, a connector, a heating device, and a temperature detector. The temperature detector is fixedly connected to the inner wall of the filter box, and a cover plate is connected to the top of the filter box by welding. A connector is installed on the surface of the filter box, and the connector is connected to the vehicle's power supply through a power cord. The connector is also fixedly connected to the heating device.

[0004] In this self-heating fuel filter assembly, one end of the filter paper is nested on the surface of the upper cover plate. The surface of the filter paper has filter holes to remove impurities from the fuel. However, this type of fuel filter assembly cannot have multiple layers of filter paper. To increase the filtration effect, a fuel filter assembly with multiple layers of filter paper is needed. Utility Model Content

[0005] The purpose of this invention is to provide a fuel filter assembly that uses multiple layers of filter paper to filter impurities in the fuel, forming a multi-stage filtration effect. In addition, the fuel can be dispersed when entering the fuel filter assembly, resulting in a better diffusion effect and thus improving the filtration effect.

[0006] To achieve the above objectives, this utility model provides a fuel filter assembly, which includes a main cylinder and an inlet cylinder and an outlet cylinder disposed at both ends of the main cylinder. Multiple perforated support members and filter paper are arranged at intervals inside the main cylinder. The filter paper is pressed and fixed between two adjacent perforated support members. The inlet cylinder is threadedly connected to the main cylinder. A diverter cylinder is disposed inside the inlet cylinder, and multiple diverter holes are disposed on the side of the diverter cylinder. A guide plate is disposed at the outer end of the diverter cylinder. The outer end of the guide plate protrudes outward to form an outer conical surface, and the inner end of the guide plate protrudes outward to form an inner conical surface. The surface of the inner conical surface is concave to form a curved shape, and the inner conical surface extends into the main cylinder and is close to the adjacent perforated support member.

[0007] Preferably, a retaining ring is provided inside the inlet cylinder near the outer end; an outwardly extending oil inlet pipe is coaxially fixed to the inner edge of the retaining ring.

[0008] Preferably, the inner side of the inlet cylinder located outside the retaining ring is provided with a threaded internal thread, and the outer side of the inlet cylinder is provided with an external regular hexagonal surface.

[0009] Preferably, a first sealing gasket is provided on the outer side of the retaining ring and fitted onto the oil inlet pipe.

[0010] Preferably, the inner diameter of the oil inlet pipe, the inner diameter of the main cylinder, the inner diameter of the distributor cylinder, and the inner diameter of the inlet cylinder increase sequentially.

[0011] Preferably, the inlet cylinder is provided with an externally threaded tube at one end near the main cylinder, and the main cylinder is provided with an internally threaded tube that is screwed into the externally threaded tube at one end near the inlet cylinder.

[0012] Preferably, the inner diameter of the internally threaded tube is larger than the inner diameter of the main cylinder, and the inner end of the internal thread forms a shoulder surface that abuts against the outer end of the externally threaded tube, and a second sealing gasket is provided on the shoulder surface.

[0013] Preferably, a support frame is provided on the outside of the hollow support near the inlet end, a support rod is provided on the periphery of the support frame, and a plurality of limiting grooves are provided on the shoulder surface to fit into the support rod.

[0014] Preferably, a limit ring is provided on the outer side of the outer end of the outlet cylinder; a swivel nut is fitted on the outlet cylinder, and a third sealing washer is provided inside the swivel nut.

[0015] Preferably, the hollow support member includes a support plate, the middle part of which is a cavity, and multiple holes are provided at both ends.

[0016] According to the above technical solution, this utility model provides a fuel filter assembly, which includes a main cylinder and an inlet cylinder and an outlet cylinder disposed at both ends of the main cylinder. Multiple perforated support members and filter paper are arranged at intervals inside the main cylinder. The filter paper is pressed and fixed between two adjacent perforated support members. The inlet cylinder is threadedly connected to the main cylinder. A diverter cylinder is disposed inside the inlet cylinder. Multiple diverter holes are disposed on the side of the diverter cylinder. A guide plate is disposed at the outer end of the diverter cylinder. The outer end of the guide plate protrudes outward to form an outer conical surface, and the inner end of the guide plate protrudes outward to form an inner conical surface. The surface of the inner conical surface is concave to form a curved shape. The inner conical surface extends into the main cylinder and is close to the adjacent perforated support member.

[0017] The fuel filter assembly has the following beneficial effects: 1. The fuel filter assembly uses multi-layer filter paper to filter impurities in the fuel, forming a multi-stage filtration effect; 2. When the fuel enters the fuel filter assembly, it can be dispersed into the fuel through multiple diversion holes, resulting in better diffusion and thus improving the filtration effect; 3. The inlet cylinder and the main cylinder are connected by threads, which facilitates disassembly and allows for easy removal and replacement of the hollow support components and filter paper located in the main cylinder; 4. When the fuel enters the inlet cylinder, it first impacts the outer cone surface to form a primary dispersion, then enters through multiple diversion holes to form a secondary dispersion, and finally impacts the inner cone surface to form a tertiary diffusion, ultimately improving the diffusion effect when the fuel enters.

[0018] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of a fuel filter assembly;

[0021] Figure 2 This is an exploded structural diagram of a preferred embodiment of a fuel filter assembly;

[0022] Figure 3 This is a cross-sectional structural schematic diagram of a preferred embodiment of a fuel filter assembly;

[0023] Figure 4 This is a schematic diagram of the overall structure of a preferred embodiment of the hollow support component.

[0024] Explanation of reference numerals in the attached figures

[0025] 1-External regular hexagonal surface; 2-Inlet cylinder; 3-Threaded internal thread; 4-Oil inlet interface pipe; 5-Main cylinder; 6-Outlet cylinder; 7-Switch nut; 8-First sealing washer; 9-External threaded pipe; 10-Internal threaded pipe; 11-Shoulder surface; 12-Limiting groove; 13-Support frame; 14-Second sealing washer; 15-Third sealing washer; 16-Diverter cylinder; 17-Diverter hole; 18-External conical surface; 19-Internal conical surface; 20-Filter paper; 21-Hollowed support component; 22-Leakage hole; 23-Limiting ring; 24-Stabilizing ring. Detailed Implementation

[0026] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0027] In this utility model, unless otherwise stated, directional terms such as "up, down, left, right, front, back, inside, outside" in the terminology only represent the orientation of the term in its conventional use or are common terms understood by those skilled in the art, and should not be regarded as a limitation on the term.

[0028] See Figure 1-4 The fuel filter assembly shown includes a main cylinder 5 and an inlet cylinder 2 and an outlet cylinder 6 disposed at both ends of the main cylinder 5. Multiple perforated support members 21 and filter paper 20 are arranged at intervals inside the main cylinder 5. The filter paper 20 is pressed and fixed between two adjacent perforated support members 21. The inlet cylinder 2 is threadedly connected to the main cylinder 5. A diverter cylinder 16 is disposed inside the inlet cylinder 2. Multiple diverter holes 17 are disposed on the side of the diverter cylinder 16. A guide plate is disposed at the outer end of the diverter cylinder 16. The outer end of the guide plate protrudes outward to form an outer conical surface 18, and the inner end of the guide plate protrudes outward to form an inner conical surface 19. The surface of the inner conical surface 19 is concave to form a curved shape. The inner conical surface 19 extends into the main cylinder 5 and is close to the adjacent perforated support member 21.

[0029] Through the implementation of the above technical solution, the fuel filter assembly uses multiple layers of filter paper 20 to filter impurities in the fuel, forming a multi-stage filtration effect. When the fuel enters the fuel filter assembly, it can be dispersed into the fuel through multiple diversion holes 17, resulting in a better diffusion effect and thus improving the filtration effect. The inlet cylinder 2 is threadedly connected to the main cylinder 5, which facilitates disassembly and easy removal and replacement of the hollow support 21 and filter paper 20 set in the main cylinder 5. When the fuel enters the inlet cylinder 2, it first impacts the outer conical surface 18 to form a primary dispersion, then enters through multiple diversion holes 17 to form a secondary dispersion, and finally impacts the inner conical surface 19 to form a tertiary diffusion, ultimately improving the diffusion effect when the fuel enters.

[0030] In this embodiment, to further provide a structure for oil pipe inlet access, a retaining ring 24 is provided inside the inlet cylinder 2 near its outer end; an outwardly extending oil inlet interface pipe 4 is coaxially fixed to the inner edge of the retaining ring 24. The oil pipe inlet is inserted into the oil inlet interface pipe 4 to achieve the inlet connection of the oil pipe.

[0031] In this embodiment, the inner side of the inlet cylinder 2 located outside the retaining ring 24 is provided with a threaded internal thread 3, and the outer side of the inlet cylinder 2 is provided with an outer regular hexagonal surface 1.

[0032] With this setup, the oil pipe connection is fitted with a corresponding external thread to mate with the internal thread 3 of the screw connection. The threaded connection between the oil pipe and the inlet access position can effectively prevent detachment.

[0033] In this embodiment, in order to increase the oil inlet sealing effect, a first sealing gasket 8 is provided on the outside of the retaining ring 24 and sleeved on the oil inlet interface pipe 4.

[0034] In this embodiment, to further provide an inlet cylinder 2 structure, the inner diameter of the oil inlet pipe 4, the inner diameter of the main cylinder 5, the inner diameter of the diverter cylinder 16, and the inner diameter of the inlet cylinder 2 are increased sequentially.

[0035] In this embodiment, an externally threaded pipe 9 is provided at one end of the inlet cylinder 2 near the main cylinder 5, and an internally threaded pipe 10, which is screwed into the externally threaded pipe 9, is provided at one end of the main cylinder 5 near the inlet cylinder 2. This arrangement provides a threaded connection method between the inlet cylinder 2 and the main cylinder 5.

[0036] In this embodiment, in order to further enhance the sealing effect between the main cylinder 5 and the inlet cylinder 2, the inner diameter of the internal threaded pipe 10 is larger than the inner diameter of the main cylinder 5, and the inner end of the internal thread is formed with a shoulder surface 11 that abuts against the outer end of the external threaded pipe 9. A second sealing gasket 14 is provided on the shoulder surface 11.

[0037] In this embodiment, a support frame 13 is provided on the outside of the hollow support member 21 near the inlet end. A support rod is provided on the periphery of the support frame 13, and a plurality of limiting grooves 12 are provided on the shoulder surface 11 to fit into the support rod. With this arrangement, the external threaded tube 9 presses against the second sealing gasket 14, and the second sealing gasket 14 presses the support rod, so that the support frame 13 presses against the hollow support member 21, thus pressing the filter paper 20.

[0038] In this embodiment, to further improve the structure of the outlet cylinder 6, a limiting ring 23 is provided on the outer side of the outer end of the outlet cylinder 6; a union nut 7 is fitted on the outlet cylinder 6, and a third sealing washer 15 is provided inside the union nut 7. The union nut 7 can be threadedly connected to the other end of the fuel pipe, and the third sealing washer 15 can increase the sealing effect at the connection.

[0039] In this embodiment, in order to further provide a hollow support member 21, the hollow support member 21 includes a support plate, the middle part of the support plate is a cavity, and multiple holes 22 are provided at both ends.

[0040] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0041] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0042] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A fuel filter assembly, characterized in that, The system includes a main cylinder (5) and an inlet cylinder (2) and an outlet cylinder (6) disposed at both ends of the main cylinder (5). Multiple hollow support members (21) and filter paper (20) are arranged at intervals inside the main cylinder (5). The filter paper (20) is pressed and fixed between two adjacent hollow support members (21). The inlet cylinder (2) is threadedly connected to the main cylinder (5). A diversion cylinder (16) is disposed inside the inlet cylinder (2). Multiple diversion holes (17) are disposed on the side of the diversion cylinder (16). A diversion plate is disposed at the outer end of the diversion cylinder (16). The outer end of the diversion plate protrudes to form an outer conical surface (18). The inner end of the diversion plate protrudes to form an inner conical surface (19). The surface of the inner conical surface (19) is concave to form a curved shape. The inner conical surface (19) extends into the main cylinder (5) and is close to the adjacent hollow support member (21).

2. The fuel filter assembly according to claim 1, characterized in that, A retaining ring (24) is provided inside the inlet cylinder (2) near the outer end; The inner edge of the retaining ring (24) is coaxially fixed with an outwardly extending oil inlet pipe (4).

3. The fuel filter assembly according to claim 2, characterized in that, The inner side of the inlet cylinder (2) located outside the retaining ring (24) is provided with a screw internal thread (3), and the outer side of the inlet cylinder (2) is provided with an outer regular hexagonal surface (1).

4. The fuel filter assembly according to claim 3, characterized in that, A first sealing gasket (8) is provided on the outside of the retaining ring (24) and sleeved on the oil inlet pipe (4).

5. The fuel filter assembly according to any one of claims 2-4, characterized in that, The inner diameters of the oil inlet pipe (4), the main cylinder (5), the distributor cylinder (16), and the inlet cylinder (2) increase sequentially.

6. The fuel filter assembly according to claim 5, characterized in that, The inlet cylinder (2) is provided with an external threaded pipe (9) at one end near the main cylinder (5); The main cylinder (5) is provided with an internally threaded pipe (10) that is screwed into the externally threaded pipe (9) at one end near the inlet cylinder (2).

7. The fuel filter assembly according to claim 6, characterized in that, The inner diameter of the internally threaded pipe (10) is larger than the inner diameter of the main cylinder (5); The inner end of the internal thread has a shoulder surface (11) that abuts against the outer end of the external threaded tube (9), and a second sealing gasket (14) is provided on the shoulder surface (11).

8. The fuel filter assembly according to claim 7, characterized in that, A support frame (13) is provided on the outside of the hollow support member (21) near the inlet end; The support frame (13) is provided with a support rod on its periphery, and the shoulder surface (11) is provided with a plurality of limiting grooves (12) that are embedded and cooperate with the support rod.

9. The fuel filter assembly according to claim 1, characterized in that, A limit ring (23) is provided on the outer side of the outer end of the outlet cylinder (6); The outlet cylinder (6) is fitted with a union nut (7), and a third sealing washer (15) is provided inside the union nut (7).

10. The fuel filter assembly according to claim 1, characterized in that, The hollow support member (21) includes a support plate, the middle part of which is a cavity, and multiple holes (22) are provided at both ends.

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