Magnet filtering device for oil return of oil tank

Abstract

The utility model discloses an oil tank return oil magnet filtering device which comprises a tank body, a handle is arranged on the outer side of the tank body, an oil inlet pipe is arranged at the upper end of the tank body, an oil return pipe is arranged at the upper end of the tank body, the oil inlet pipe is connected with the oil return pipe through a pipeline, and a flow divider is arranged in the oil inlet pipe. The flow divider makes contact with the oil return pipe, a filtering structure is arranged in the oil inlet pipe, a magnetic filtering structure is arranged in the filtering structure, and the filtering structure and the magnetic filtering structure are connected in a clamped mode. Due to the fact that the flow divider is arranged in the oil inlet pipe, when oil returns and enters the oil inlet pipe, the oil firstly enters the flow divider, the flow divider can disperse oil flow in the oil return pipe to the outlets of the flow dividing holes, and therefore the oil flow speed of a single hole is reduced, oil flow is more stable, and oil leakage is avoided. Therefore, pressure fluctuation caused by too high oil flow speed is reduced, and the oil return pipe and related parts are protected against impact.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil tank filtering, and in particular relates to an oil tank return oil magnet filtering device. Background Art

[0002] During engine operation, the fuel pump is responsible for drawing fuel from the fuel tank and delivering it under pressure to the engine's combustion chamber to meet engine demand. However, due to precise control of fuel injection volume and variations in engine combustion efficiency, some fuel is not completely burned in the combustion chamber or used to produce power. This fuel, along with any excess fuel generated during the pump's delivery process, is returned to the fuel tank through a dedicated return line or channel, driven by the pressure differential generated by the pump or gravity, to maintain stable system operation.

[0003] The oil return phenomenon in the fuel tank is one of the manifestations of the normal operation of the fuel system, but it needs regular inspection and maintenance to ensure the stable operation of the system. If the oil return in the fuel tank is abnormal (such as excessive oil return, poor oil return, etc.), it may be that there is a fault or blockage in the fuel system, which requires timely inspection and maintenance. According to the authorization publication number: CN205744706U, a fuel tank return oil magnetic filter device is provided. This utility model relates to the technical field of fuel tank return oil filtration, in particular to a fuel tank return oil magnetic filter device, which includes a fuel tank body, An oil inlet pipe is provided on the oil tank body, a fuel tank cap is provided on the oil inlet pipe, and an oil return pipe is provided on the side wall of the oil inlet pipe. The oil return pipe is located on the oil inlet pipe outside the oil tank body. A filter is provided in the oil inlet pipe on the side of the oil return pipe close to the oil tank body, and a magnet assembly is provided in the filter. The magnet assembly structure comprises one or more magnets, which are provided in a hollow cylinder with a smooth outer surface. Cover plates are provided at both ends of the cylinder, and the cover plates and the cylinder enclose the magnets inside. The oil tank return oil magnet filter device obtained by the utility model has a reasonable structural design, which makes it easier to remove the magnet assembly or filter from the oil inlet pipe. At the same time, it makes it easier and more convenient to clean metal powder from the magnet assembly, thereby improving the performance of the device.

[0004] However, existing technologies present several challenges: During the oil return process, as oil enters the oil inlet pipe from the top, a single oil return hole can cause excessive pressure on the pipe, leading to poor oil return or oil splashing. This can also put the pipe under even greater pressure, potentially causing oil leaks and potential safety hazards. Furthermore, as oil flows through the filter structure, impurities filtered by the filter cartridge can accumulate on the inside of the filter screen. If not cleaned promptly, this can easily cause blockage, preventing the fuel from fully burning and reducing fuel efficiency. Therefore, we propose a fuel tank return oil magnetic filter device. Utility Model Content

[0005] In response to the problems existing in the prior art, the purpose of the utility model is to provide an oil tank return oil magnetic filter device. By setting a diverter and a brush ring, when the oil flows back into the oil inlet pipe, it will first enter the diverter for diversion buffering, and then flow through the multiple diversion holes inside the diverter to reduce the pressure on the oil inlet pipe. The brush ring floats under the impact of the oil, so that impurities on the filter cartridge cannot accumulate, thereby brushing off the sediment.

[0006] The utility model is implemented as follows: a fuel tank return oil magnetic filter device includes a box body, a handle is provided on the outside of the box body, an oil inlet pipe is provided at the upper end of the box body, an oil return pipe is provided at the upper end of the box body, the oil inlet pipe and the oil return pipe are connected by a pipeline, a diverter is provided inside the oil inlet pipe, the diverter is in contact with the oil return pipe, a filtering structure is provided inside the oil inlet pipe, a magnetic filtering structure is provided inside the filtering structure, and the filtering structure and the magnetic filtering structure are clamped together.

[0007] Optionally, an end cover is provided at the upper end of the oil inlet pipe, an annular platform is provided on the oil inlet pipe, an annular groove is provided on the end cover, the annular groove and the annular platform are provided correspondingly, the annular groove and the annular platform are plugged into the annular platform, a claw platform is provided at the lower end of the oil inlet pipe, a connecting hole is provided on the outer side of the oil inlet pipe, and the connecting hole is fixedly connected to the oil return pipe.

[0008] Optionally, a diverter is fixedly connected to the inside of the oil inlet pipe, the diverter is open at both ends and is hollow inside, an oil inlet hole is opened on the outside of the diverter, the oil inlet hole is connected to the oil return pipe, and a diverter hole is opened on the inside of the diverter.

[0009] Optionally, there are multiple diversion holes, and the multiple diversion holes are distributed in a circular pattern.

[0010] Optionally, the filtering structure includes a filter cartridge, which is fixedly connected to the claw platform, a collector is provided at the lower end of the filter cartridge, an inclined tube is provided inside the collector, and a drain valve is provided at the lower end of the collector.

[0011] Optionally, the magnetic filtration structure includes a mounting cover, which is clamped with the filter cartridge, a magnetic block is fixedly connected to the lower end of the mounting cover, a mounting tube is threadedly connected to the lower end of the mounting cover, and the magnetic block is plugged into the mounting tube.

[0012] Optionally, a first spring is provided on the outside of the mounting cylinder, one end of the first spring is fixedly connected to the mounting cylinder, the other end of the first spring is fixedly connected to a brush ring, and the outside of the brush ring is slidably connected to the filter cylinder.

[0013] Optionally, a slide groove is provided on the filter cartridge, an avoidance hole is provided on the filter cartridge, the slide groove is connected to the avoidance hole, a limiting hole is provided inside the slide groove, a slider is slidably connected to the inside of the mounting cover, a shift block is provided on the slider, a second spring is provided on the slider, the second spring is in contact with the mounting cover, and the slider is plugged into the limiting hole.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. By setting a diverter in the oil inlet pipe, when the oil returns to the oil inlet pipe, the oil first enters the diverter. The diverter can disperse the oil flow in the return pipe to multiple diversion hole outlets, thereby reducing the oil flow speed of a single hole and making the oil flow more stable. This helps to reduce the pressure fluctuation caused by excessive oil flow speed and protect the return pipe and related components from impact.

[0016] 2. When the oil enters the filter structure, the oil drives the brush ring downward through the impact force. The brush ring slides and cleans the inside of the filter cartridge to ensure that the filter cartridge surface is always kept clean, preventing impurities in the oil from depositing on the filter cartridge and causing blockage, thereby extending the service life of the filter cartridge.

[0017] 3. Connect the magnetic filter structure with the filter structure, insert the slider into the limit hole, fix the installation cover and the filter cartridge, improve the stability of the filter structure, ensure that the oil maintains a smooth flow state when passing through the filter cartridge, reduce eddy currents and turbulence, thereby improving the filtration efficiency and reducing the loss of the filter structure.

[0018] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure provided by the utility model;

[0020] Figure 2 This is a schematic cross-sectional view of the box provided by the present invention;

[0021] Figure 3 This is a schematic cross-sectional view of the oil inlet pipe provided by the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the diverter provided by the utility model;

[0023] Figure 5 This is a schematic diagram of the distribution of diversion holes provided by the utility model;

[0024] Figure 6 This is a schematic cross-sectional view of the filtering structure provided by the present invention;

[0025] Figure 7 yes Figure 6 A magnified view of part A;

[0026] Figure 8 This is a structural schematic diagram of a slider provided by the utility model.

[0027] In the figure: 1. Box body; 11. Handle; 12. Oil inlet pipe; 13. Oil return pipe; 2. End cover; 21. Ring platform; 22. Annular groove; 23. Claw platform; 24. Connecting hole; 3. Diverter; 31. Oil inlet hole; 32. Diverter hole; 4. Filter structure; 41. Filter cartridge; 42. Collector; 43. Inclined pipe; 44. Drain valve; 5. Magnetic filter structure; 51. Mounting cover; 52. Magnetic block; 53. Mounting cartridge; 54. First spring; 55. Brush ring; 6. Slide groove; 61. Avoidance hole; 62. Limiting hole; 63. Slider; 64. Diverter block; 65. Second spring. DETAILED DESCRIPTION

[0028] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0029] like Figures 1 to 8 As shown, an embodiment of the utility model provides an oil tank return oil magnetic filter device, including a box body 1, a handle 11 is provided on the outside of the box body 1, an oil inlet pipe 12 is provided at the upper end of the box body 1, an oil return pipe 13 is provided at the upper end of the box body 1, the oil inlet pipe 12 and the oil return pipe 13 are connected by a pipeline, a diverter 3 is provided inside the oil inlet pipe 12, the diverter 3 is in contact with the oil return pipe 13, a filtering structure 4 is provided inside the oil inlet pipe 12, a magnetic filtering structure 5 is provided inside the filtering structure 4, and the filtering structure 4 and the magnetic filtering structure 5 are clamped together.

[0030] Furthermore, when the oil is returning, it first enters the diverter 3 inside the oil inlet pipe 12 through the return oil pipe 13, and then enters the interior of the oil inlet pipe 12 through the diverter hole 32 set on the diverter 3, and then the oil passes through the through hole on the mounting cover 51 into the filter cartridge 41. After the metal impurities inside the oil are removed by the magnetic attraction of the magnetic block 52, the oil enters the oil tank after passing through the dense filter holes opened on the outside of the filter cartridge 41. Through the joint action of the diverter 3, the filter structure 4 and the magnetic filter structure 5, efficient filtration of the oil is achieved, impurities and metal particles therein are removed, and the cleanliness of the oil is ensured. In addition, the entire filtering device is compactly designed, occupies little space, and is easy to install and maintain.

[0031] Specifically, an end cover 2 is provided at the upper end of the oil inlet pipe 12, an annular platform 21 is provided on the oil inlet pipe 12, an annular groove 22 is provided on the end cover 2, the annular groove 22 is provided corresponding to the annular platform 21, the annular groove 22 is plugged into the annular platform 21, a claw platform 23 is provided at the lower end of the oil inlet pipe 12, a connecting hole 24 is provided on the outside of the oil inlet pipe 12, and the connecting hole 24 is fixedly connected to the oil return pipe 13.

[0032] Further, such as Figure 3 As shown, the end cover 2 is used to close the outlet of the oil inlet pipe 12 to prevent oil from flowing out when not needed or external impurities from entering. The annular groove 22 on the end cover 2 is connected to the corresponding annular platform 21 by plugging, which not only enhances the connection strength between the end cover 2 and the oil inlet pipe 12, but also ensures the sealing of the connection to prevent oil leakage. The claw platform 23 set at the lower end of the oil inlet pipe 12 is used to fix the filter structure 4 to improve the stability of the filter structure 4.

[0033] Specifically, the inside of the oil inlet pipe 12 is fixedly connected to a diverter 3, which is open at both ends and hollow inside. An oil inlet hole 31 is provided on the outside of the diverter 3, and the oil inlet hole 31 is plugged into the oil return pipe 13. A diverter hole 32 is provided on the inside of the diverter 3. There are multiple diverter holes 32, and the multiple diverter holes 32 are distributed in a circle.

[0034] Furthermore, the diverter 3 is installed corresponding to the connecting hole 24 on the oil inlet pipe 12, and the oil inlet hole 31 of the separator is connected to the return oil pipe 13, so that the returning oil directly enters the diverter 3 through the return oil pipe 13. The multiple diverter holes 32 opened on the inner side of the diverter 3 are used to disperse the oil entering the diverter 3 in different directions or paths, thereby achieving uniform dispersion of the oil, reducing the direct impact of the oil on the filter structure 4, and reducing the risk of wear and damage to the filter structure 4.

[0035] Specifically, the filtering structure 4 includes a filter cartridge 41, which is fixedly connected to the claw platform 23. A collector 42 is provided at the lower end of the filter cartridge 41, an inclined tube 43 is provided inside the collector 42, and a drain valve 44 is provided at the lower end of the collector 42; the magnetic filtration structure 5 includes a mounting cover 51, which is snap-fitted to the filter cartridge 41, a magnetic block 52 is fixedly connected to the lower end of the mounting cover 51, a mounting tube 53 is threadedly connected to the lower end of the mounting cover 51, and the magnetic block 52 is plugged into the mounting tube 53.

[0036] It should be noted that the mounting cover 51 is snap-fitted to the filter cartridge 41 and serves as the end cap 2 of the filter cartridge 41. The mounting cover 51 is also provided with a through hole for passing oil. The lower end of the mounting cover 51 is fixedly connected to the magnetic block 52. Then, the mounting cylinder 53 is sleeved on the outside of the magnetic block 52 and is threadedly connected to the mounting cover 51. This makes the connection between the filter cartridge 41, the mounting cover 51, the magnetic block 52 and the mounting cylinder 53 more stable, thereby improving the stability of filtration.

[0037] Furthermore, in the process of the oil passing through the filter cartridge 41 and the magnetic filter structure 5, impurities and metal particles will be retained on the filter medium and the magnetic block 52, and some impurities will be precipitated into the inclined tube 43 in the collector 42 as the oil flows. The inclined tube 43 can improve the precipitation efficiency of impurities and reduce the impact of the oil on the precipitated impurities.

[0038] Specifically, a first spring 54 is provided on the outside of the mounting cylinder 53 , one end of the first spring 54 is fixedly connected to the mounting cylinder 53 , the other end of the first spring 54 is fixedly connected to a brush ring 55 , and the outside of the brush ring 55 is slidably connected to the filter cylinder 41 .

[0039] Furthermore, when the oil enters the filter cartridge 41, it generates a certain impact force. Through the first spring 54 and the brush ring 55 on the outside of the mounting cylinder 53, the impact force of the oil is first received by the brush ring 55 and then buffered by the elasticity of the first spring 54. In this way, the direct impact force of the oil on the filter cartridge 41 is greatly reduced, thereby protecting the integrity of the filter cartridge 41 and extending its service life.

[0040] Furthermore, the brush ring 55 not only buffers the impact, but also descends as the oil enters, and during the descent, it comes into sliding contact with the inner wall of the filter cartridge 41, helping to remove attachments or slightly blocked impurities on the inner wall of the filter cartridge 41, thereby keeping the filter cartridge 41 clean and unobstructed.

[0041] Furthermore, due to the elasticity of the first spring 54, the brush ring 55 can adaptively adjust according to changes in oil flow. When the oil flow increases, the brush ring 55 is subjected to a greater force and descends further, thereby increasing the contact area with the inner wall of the filter cartridge 41 and improving the cleaning effect. Conversely, when the oil flow decreases, the brush ring 55 rises, reducing contact with the inner wall of the filter cartridge 41 and preventing unnecessary wear.

[0042] Specifically, a slide groove 6 is opened on the filter cartridge 41, an avoidance hole 61 is opened on the filter cartridge 41, the slide groove 6 is connected to the avoidance hole 61, a limiting hole 62 is opened inside the slide groove 6, and a slider 63 is slidably connected to the inside of the mounting cover 51, a shift block 64 is provided on the slider 63, a second spring 65 is provided on the slider 63, the second spring 65 is in contact with the mounting cover 51, and the slider 63 is plugged into the limiting hole 62.

[0043] Furthermore, when performing regular cleaning, pull the shift block 64, which drives the slider 63 to slide toward the inside of the mounting cover 51, and disengage the slider 63 from the limiting hole 62, rotate the mounting cover 51 until the slider 63 is aligned with the avoidance hole 61, lift the mounting cover 51, and thus remove the magnetic filter structure 5 from the filter structure 4.

[0044] Working principle: During operation, the reflux oil first enters the inside of the diverter 3 through the oil inlet hole 31, and then is dispersed in multiple directions inside the diverter 3, flows out through the diverter hole 32, and enters the filter cartridge 41. The oil enters the filter cartridge 41 through the oil inlet pipe 12. The impact of the oil drives the brush ring 55 to descend, and is buffered by the first spring 54. During the descent, the brush ring 55 slides in contact with the inner wall of the filter cartridge 41 to remove attachments or impurities. The oil passes through the magnetic block 52 and the filter cartridge 41 and is filtered out of the filter cartridge 41, while the impurities are retained on the filter medium and remain in the collector 42 through sedimentation. During regular cleaning, they are removed through the drain valve 44.

[0045] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fuel tank return oil magnetic filter device, comprising a box body (1), characterized in that: The outer side of the box body (1) is provided with a handle (11), the upper end of the box body (1) is provided with an oil inlet pipe (12), the upper end of the box body (1) is provided with an oil return pipe (13), the oil inlet pipe (12) and the oil return pipe (13) are connected by a pipeline, the interior of the oil inlet pipe (12) is provided with a diverter (3), the diverter (3) is in contact with the oil return pipe (13), the interior of the oil inlet pipe (12) is provided with a filter structure (4), the interior of the filter structure (4) is provided with a magnetic filter structure (5), and the filter structure (4) and the magnetic filter structure (5) are clamped.

2. The oil tank return oil magnetic filter device according to claim 1, characterized in that: The upper end of the oil inlet pipe (12) is provided with an end cover (2), the oil inlet pipe (12) is provided with a ring platform (21), the end cover (2) is provided with an annular groove (22), the annular groove (22) is provided corresponding to the ring platform (21), the annular groove (22) and the ring platform (21) are plugged together, the lower end of the oil inlet pipe (12) is provided with a claw platform (23), the outer side of the oil inlet pipe (12) is provided with a connecting hole (24), and the connecting hole (24) is fixedly connected to the oil return pipe (13).

3. The oil tank return oil magnetic filter device according to claim 1, characterized in that: A diverter (3) is fixedly connected to the inside of the oil inlet pipe (12). The diverter (3) is open at both ends and hollow inside. An oil inlet hole (31) is provided on the outside of the diverter (3). The oil inlet hole (31) is plugged into the oil return pipe (13). A diverter hole (32) is provided on the inside of the diverter (3).

4. The oil tank return oil magnetic filter device according to claim 3, characterized in that: There are a plurality of diversion holes (32), and the plurality of diversion holes (32) are distributed in a circumferential manner.

5. The oil tank return oil magnetic filter device according to claim 1, characterized in that: The filtering structure (4) comprises a filter cartridge (41), the filter cartridge (41) being fixedly connected to the claw platform (23), a collector (42) being provided at the lower end of the filter cartridge (41), an inclined tube (43) being provided inside the collector (42), and a sewage valve (44) being provided at the lower end of the collector (42).

6. The oil tank return oil magnetic filter device according to claim 1, characterized in that: The magnetic filter structure (5) comprises a mounting cover (51), the mounting cover (51) is clamped with the filter cartridge (41), the lower end of the mounting cover (51) is fixedly connected with a magnetic block (52), the lower end of the mounting cover (51) is threadedly connected with a mounting cylinder (53), and the magnetic block (52) is plugged into the mounting cylinder (53).

7. The oil tank return oil magnetic filter device according to claim 6, characterized in that: A first spring (54) is provided on the outside of the installation cylinder (53), one end of the first spring (54) is fixedly connected to the installation cylinder (53), the other end of the first spring (54) is fixedly connected to a brush ring (55), and the outside of the brush ring (55) is slidably connected to the filter cylinder (41).

8. The oil tank return oil magnetic filter device according to claim 6, characterized in that: The filter cartridge (41) is provided with a chute (6), the filter cartridge (41) is provided with an avoidance hole (61), the chute (6) is connected to the avoidance hole (61), a limiting hole (62) is provided inside the chute (6), the interior of the mounting cover (51) is slidably connected with a slider (63), the slider (63) is provided with a shift block (64), the slider (63) is provided with a second spring (65), the second spring (65) is in contact with the mounting cover (51), and the slider (63) is plugged into the limiting hole (62).

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