Corrosion-resistant long-service-life fuel filter

Abstract

The invention discloses a corrosion-resistant long-service-life fuel filter, and relates to the field of fuel filters, the corrosion-resistant long-service-life fuel filter comprises a filter shell and a fuel inlet communicated with the lower end of the filter shell, the upper end of the filter shell is communicated with a fuel outlet, and a middle through column is mounted in the filter shell; fuel oil filter paper is arranged on the surface of the middle through column, and a pressure release valve is installed at the lower end of the middle through column. When the anti-corrosion long-service-life fuel filter is used, oil is added into the filter shell through the oil inlet, and at the moment, the oil penetrates through the fuel filter paper to be filtered, then enters the middle through column and is discharged through the oil outlet correspondingly formed in the upper end, so that the oil supply effect can be achieved; the internal pressure of the fuel filter can be adjusted through the pressure release valve and the oil return port at the bottom, the situation that oil cannot be supplied due to the fact that the internal pressure of the filter shell is too high is avoided, the fuel filter paper is made of polytetrafluoroethylene, the material has the corrosion resisting effect, and the service life of the fuel filter is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel filters, and particularly to a fuel filter with high corrosion resistance and long service life. Background Art

[0002] In general, there is a fuel filter for fuel supply inside a combustion engine. The fuel filter can filter the fuel used for starting a vehicle. The fuel filter is a device for filtering impurities, dust, and moisture in the fuel. Its main function is to ensure the cleanliness of the fuel entering the engine, thereby protecting the normal operation of the engine and extending the service life of the engine and the fuel system.

[0003] In the prior art, if the filter paper inside the fuel filter is soaked in oil stains for a long time, the filter paper is likely to be corroded, and the corroded filter paper affects the filtering effect.

[0004] To overcome the above deficiencies, a Chinese patent of the prior art (publication number: CN109404185B) discloses a fuel filter, which includes a cup-shaped housing with an open end, a cover body, a mounting bracket, and a functional device. The cover body closes the housing; the mounting bracket is fixed on the side of the cover body away from the housing; the functional device is fixed on the side of the cover body facing away from the housing by the mounting bracket; the cover body includes a structural plate, and a corrugated structure for enhancing the elasticity of the structural plate is formed in the area surrounded by the mounting bracket. The functional device is supported on the corrugated structure. For the above fuel filter, if the height of the functional device is greater than its assembly height on the mounting bracket, then when assembling the functional device, due to the elasticity of the corrugated structure, the functional device presses the corrugated structure towards the housing, and then the functional device is installed on the mounting bracket. Therefore, the corrugated structure on the structural plate can avoid the problem that the functional device is not easily assembled, thereby avoiding affecting the operation of the fuel filter.

[0005] To overcome the above deficiencies, a Chinese patent of the prior art (publication number: CN206647194U) discloses a fuel filter, which includes a filter paper, a top cover, a bottom cover, and a central tube. The filter paper surrounds the outer peripheral surface of the central tube, and the top cover and the bottom cover are located at both ends of the filter paper; the top cover is connected with a valve seat, the valve seat extends into the central tube and is provided with an oil outlet, and a one-way valve is installed at the oil outlet of the valve seat. When the engine is working, the fuel filter works normally; after the engine shuts down and stops, under the action of the one-way valve, the oil outlet on the valve seat is closed, preventing the fuel in the pipeline connected to the fuel filter and inside the fuel filter from flowing back, so that there will be no air cavity formed in the fuel filter and the fuel pipeline due to the presence of air, resulting in insufficient fuel supply, and thus the phenomenon of difficult starting caused by insufficient fuel supply when the engine is restarted can be avoided.

[0006] Although the prior art can overcome the above-mentioned deficiencies, there are still other problems in its operation. For example, when the fuel filter is in use, the filter paper inside the fuel filter is prone to damage and bending due to the vibration generated by the engine, which affects the subsequent use of the fuel filter and easily causes poor fuel filtration. Summary of the Invention

[0007] The purpose of the present invention is to provide a fuel filter with high corrosion resistance and long service life to solve the problem that when the fuel filter is in use, the filter paper inside the fuel filter is prone to damage and bending due to the vibration generated by the engine, which affects the subsequent use of the fuel filter and easily causes poor fuel filtration as mentioned in the above background technology.

[0008] To achieve the above purpose, the present invention provides the following technical solution: A fuel filter with high corrosion resistance and long service life, including a filter housing and an oil inlet connected to the lower end of the filter housing, and an oil outlet is connected to the upper end of the filter housing. A through column is installed inside the filter housing, and a fuel filter paper is arranged on the surface of the through column. A pressure relief valve is installed at the lower end of the through column, and an oil return port is connected to the bottom of the pressure relief valve; a contact plate is arranged on the inner wall of the filter housing, and a contact protection mechanism is arranged between the contact plate and the filter housing; a first fixing plate is installed on the inner wall of the filter housing, and an auxiliary stretching mechanism is arranged inside the first fixing plate; a knocking plate is arranged on the inner wall of the filter housing, and an auxiliary dredging mechanism is installed in the middle of the knocking plate.

[0009] Furthermore, holes are evenly formed on the surface of the through column, and the surface of the through column is bonded to the fuel filter paper. The material of the fuel filter paper is made of polytetrafluoroethylene. A support through plate is arranged at the lower end of the fuel filter paper, and the outer side of the support through plate is fixedly installed on the inner wall of the filter housing. The fuel filter paper is made of polytetrafluoroethylene, and this material has an anti-corrosion effect and improves the service life of the fuel filter.

[0010] Furthermore, the contact protection mechanism is provided with a vertical plate, and the upper end of the vertical plate is fixedly installed on the inner wall of the filter housing. A cross bar is fixedly installed inside the vertical plate, and a compression block is sleeved on the surface of the cross bar.

[0011] Furthermore, a movable plate is rotatably installed at the lower end of the compression block, and the bottom of the movable plate is rotatably installed at the upper end of the contact plate. The shape of the contact plate is arc-shaped, and the lower end of the contact plate contacts the upper end of the fuel filter paper.

[0012] Furthermore, an adjusting spring is sleeved on the surface of the cross bar, and the inner and outer sides of the adjusting spring are installed between the compression block and the vertical plate, and a damper is installed at the middle end of the vertical plate, and the inner side of the damper is fixedly installed on the outer side of the compression block, so that the fuel filter paper inside the fuel filter will not be easily deformed and offset due to the shaking of the device, thereby avoiding affecting the filtration of the fuel.

[0013] Furthermore, the auxiliary stretching mechanism is provided with an arc plate, and the arc plate is located at the upper end of the outer side of the resistance plate, and a limit block is fixedly installed on the outer side of the arc plate, and the limit block is slidably connected to the inner wall of the filter housing, and a pressure spring is arranged between the filter housing and the limit block.

[0014] Furthermore, a vertical rod is fixedly installed at the lower end of the arc plate, and the vertical rod corresponds to the folding part of the fuel filter paper. The vertical rod evenly installed at the lower end of the arc plate is located at the folding part of the fuel filter paper.

[0015] Furthermore, a telescopic sleeve block is rotatably installed on the inner side of the vertical pole, and the telescopic sleeve block is rotatably installed on the inner side of the first fixed plate, and a corrector is fixedly installed on the inner side of the telescopic sleeve block, and the shape of the corrector is "T" shape, and the end of the corrector corresponds to the folded inner wall of the fuel filter paper, which can further protect the filtration of the fuel filter paper on the basis of avoiding deformation of the fuel filter paper.

[0016] Furthermore, the auxiliary dredging mechanism is provided with a second fixed plate, and the outer side of the second fixed plate is fixedly mounted on the inner wall of the filter housing, and the inner side of the second fixed plate is rotatably mounted with the knocking plate, and the upper end of the knocking plate corresponds to the lower end of the supporting plate, which can cooperate with the vibration of the fuel filter itself to further ensure the dredging effect and avoid blockage.

[0017] Furthermore, the outer side of the knocking plate corresponds to the lower end of the vertical rod, and the lower end of the vertical rod passes through the supporting plate, and a torsion spring is installed between the knocking plate and the second fixing plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. When in use, add oil to the filter housing through the oil inlet. At this time, the oil passes through the fuel filter paper and enters the middle column, and then is discharged through the corresponding oil outlet at the upper end, so as to achieve the effect of oil supply. The pressure inside the fuel filter can be adjusted through the pressure relief valve and the oil return port at the bottom to prevent the internal pressure of the filter housing from being too high and unable to supply oil. The fuel filter paper is made of polytetrafluoroethylene, which has a corrosion-resistant effect and prolongs the service life of the fuel filter; Furthermore, with the support of the support plate, if the filter vibrates with the engine, the adjustment spring on the inner side of the vertical plate applies pressure to the compression block, and the contact plate presses down the fuel filter paper due to its own disc shape, thereby being able to apply stable pressure to the fuel filter paper, so that the fuel filter paper inside the fuel filter will not be easily deformed and shifted due to the shaking of the device, thereby avoiding affecting the filtration of the fuel.

[0019] 2. As the compression block applies pressure to the movable plate, when the fuel filter vibrates, the movement of the compression block pulls the arc plate through the traction rope. The two sides of the arc plate are slidably connected to the filter housing through the limit blocks, and the limit blocks squeeze the pressure spring inside the filter housing upward, so that the telescopic sleeve rotates around the inner side of the first fixed plate to move the corrector. Due to its own shape, the corrector can move the folded part of the fuel filter paper up and down to avoid the adhesion of the inner wall of the fuel filter paper, so that there is a gap between the fuel filter papers, ensuring the filtration of the fuel filter paper to the oil, and can further protect the filtration of the fuel filter paper on the basis of avoiding deformation of the fuel filter paper.

[0020] 3. When the vertical rod reciprocates up and down, the vertical rod moves up and down through the supporting plate, and the vertical rod presses the knocking plate inside the second fixed plate downward. The outer end of the knocking plate is squeezed so that the inner end knocks the supporting plate, so that the knocking of the knocking plate can cooperate with the vibration of the fuel filter itself, further ensuring the dredging effect and avoiding blockage; Furthermore, when the vertical rod rises, the knocking plate is reset through the torsion spring between the knocking plate and the second fixed plate, thereby further improving the knocking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention when viewed from above.

[0023] Figure 3 It is a schematic diagram of the cross-sectional three-dimensional structure of the present invention.

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the supporting plate of the present invention when viewed from above.

[0025] Figure 5 It is a schematic diagram of the cross-sectional three-dimensional structure of the fuel filter paper of the present invention.

[0026] Figure 6 It is a schematic diagram of the top view of the three-dimensional structure of the abutment plate of the present invention.

[0027] Figure 7 For the present invention Figure 6 Enlarged structural diagram at A in the middle.

[0028] Figure 8Schematic diagram of the vertical rod three-dimensional structure of the present invention.

[0029] Figure 9 Schematic diagram of the top-down three-dimensional structure of the telescopic sleeve block of the present invention.

[0030] Figure 10 Schematic diagram of the three-dimensional structure of the auxiliary dredging mechanism of the present invention.

[0031] Figure 11 Schematic diagram of the bottom-up three-dimensional structure of the percussion plate of the present invention.

[0032] In the figure: 1, filter housing; 2, oil inlet; 3, oil outlet; 4, middle-through column; 5, pressure relief valve; 6, oil return port; 7, fuel filter paper; 8, support through plate; 9, vertical plate; 10, cross bar; 11, compression block; 12, movable plate; 13, contact plate; 14, adjusting spring; 15, damper; 16, traction rope; 17, arc plate; 18, limit block; 19, vertical rod; 20, first fixing plate; 21, telescopic sleeve block; 22, corrector; 23, second fixing plate; 24, percussion plate; 25, torsion spring. Specific implementation mode

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Embodiment 1: As Figures 1-7The technical solution shown is an anti-corrosion and long-life fuel filter. To solve the problem of easy deformation of the filter paper, it discloses: a filter housing 1 and an oil inlet 2 connected to the lower end of the filter housing 1, and an oil outlet 3 is connected to the upper end of the filter housing 1. A through-column 4 is installed inside the filter housing 1, and a fuel filter paper 7 is arranged on the surface of the through-column 4. A pressure relief valve 5 is installed at the lower end of the through-column 4, and an oil return port 6 is connected to the bottom of the pressure relief valve 5. A contact plate 13 is arranged on the inner wall of the filter housing 1, and a contact protection mechanism is arranged between the contact plate 13 and the filter housing 1. The surface of the through-column 4 is evenly provided with holes, and the surface of the through-column 4 and the fuel filter paper 7 are adhesively bonded. And the material of the fuel filter paper 7 is made of polytetrafluoroethylene. A support through-plate 8 is arranged at the lower end of the fuel filter paper 7, and the outer side of the support through-plate 8 is fixedly installed on the inner wall of the filter housing 1. The contact protection mechanism is provided with a vertical plate 9, and the upper end of the vertical plate 9 is fixedly installed on the inner wall of the filter housing 1. And a cross-bar 10 is fixedly installed on the inner side of the vertical plate 9. And a compression block 11 is sleeved on the surface of the cross-bar 10. The lower end of the compression block 11 is rotatably installed with a movable plate 12, and the bottom of the movable plate 12 is rotatably installed on the upper end of the contact plate 13. And the shape of the contact plate 13 is arc-shaped, and the lower end of the contact plate 13 contacts the upper end of the fuel filter paper 7. A regulating spring 14 is sleeved on the surface of the cross-bar 10, and the inner and outer sides of the regulating spring 14 are installed between the compression block 11 and the vertical plate 9. And a damper 15 is installed at the middle end of the vertical plate 9, and the inner side of the damper 15 is fixedly installed on the outer side of the compression block 11.

[0035] During use, oil is added to the inside of the filter housing 1 through the oil inlet 2. At this time, the oil passes through the fuel filter paper 7 for filtration and then enters the inside of the through-column 4, and then is discharged through the correspondingly arranged oil outlet 3 at the upper end, so as to achieve the effect of oil supply. The pressure relief valve 5 and the oil return port 6 at the bottom can adjust the pressure inside the fuel filter to prevent the pressure inside the filter housing 1 from being too high to supply oil. And the fuel filter paper 7 is made of polytetrafluoroethylene, and this material has an anti-corrosion effect, improving the service life of the fuel filter. Under the support of the support through-plate 8, if the filter vibrates with the engine, the regulating spring 14 inside the vertical plate 9 presses on the compression block 11, and with the setting of the damper 15, it avoids the reciprocating vibration of the regulating spring 14. While the compression block 11 slides along the surface of the cross-bar 10, it can push the movable plate 12, and the movable plate 12 pushes the contact plate 13. The contact plate 13 presses down on the fuel filter paper 7 due to its own disc shape, so as to stably press on the fuel filter paper 7, so that the fuel filter paper 7 inside the fuel filter will not easily deform and shift due to the shaking of the device, avoiding affecting the filtration of fuel.

[0036] Example two: As Figures 1-9The technical solution shown in the embodiment is based on the first embodiment. In order to solve the problem that the filter paper is easy to stick together and affect the filtration, it is disclosed that: the inner wall of the filter housing 1 is installed with a first fixing plate 20, and the inner side of the first fixing plate 20 is provided with an auxiliary stretching mechanism, the auxiliary stretching mechanism is provided with an arc plate 17, and the arc plate 17 is located at the outer upper end of the abutment plate 13, and the outer side of the arc plate 17 is fixedly installed with a limit block 18, and the limit block 18 is slidably connected to the inner wall of the filter housing 1, and the filter housing 1 and the limit block 18 are connected. A pressure spring is provided, a vertical rod 19 is fixedly installed at the lower end of the arc plate 17, and the vertical rod 19 corresponds to the folded part of the fuel filter paper 7, the vertical rod 19 evenly installed at the lower end of the arc plate 17 is located at the folded part of the fuel filter paper 7, a telescopic sleeve block 21 is rotatably installed on the inner side of the vertical rod 19, and the telescopic sleeve block 21 is rotatably installed on the inner side of the first fixed plate 20, and a corrector 22 is fixedly installed on the inner side of the telescopic sleeve block 21, and the shape of the corrector 22 is "T" shaped, and the end of the corrector 22 corresponds to the folded inner wall of the fuel filter paper 7.

[0037] As the compression block 11 applies pressure to the movable plate 12, when the fuel filter vibrates, the movement of the compression block 11 pulls the arc plate 17 through the traction rope 16. The two sides of the arc plate 17 are slidably connected to the filter housing 1 through the limit blocks 18, and the limit blocks 18 press the pressure spring inside the filter housing 1 upward. At this time, the arc plate 17 can be reciprocated. The up and down reciprocating movement of the arc plate 17 can drive the vertical rods 19 evenly arranged at the lower end. The vertical movement of the vertical rods 19 can pull the inner telescopic sleeve 21, and the telescopic sleeve 21 is rotatably mounted on the inner side of the first fixed plate 20. The telescopic sleeve 21 is telescopic so that it can rise and fall with the vertical rod 19, so that the telescopic sleeve 21 rotates around the inner side of the first fixed plate 20 to move the corrector 22. Due to its own shape, the corrector 22 can move the folded part of the fuel filter paper 7 up and down to avoid the inner wall of the fuel filter paper 7 from being attached, so that there is a gap between the fuel filter papers 7, thereby ensuring that the fuel filter paper 7 filters the oil, and can further protect the filtration of the fuel filter paper 7 on the basis of avoiding the deformation of the fuel filter paper 7.

[0038] Embodiment 3: Figures 1-11 The technical solution shown is based on the second embodiment and, in order to solve the problem that the fuel filter is easily clogged, discloses: a knocking plate 24 is provided on the inner wall of the filter housing 1, and an auxiliary dredging mechanism is installed at the middle end of the knocking plate 24, the auxiliary dredging mechanism is provided with a second fixed plate 23, and the outer side of the second fixed plate 23 is fixedly installed on the inner wall of the filter housing 1, and the inner side of the second fixed plate 23 is rotatably installed with the knocking plate 24, and the upper end of the knocking plate 24 corresponds to the lower end of the supporting plate 8, the outer side of the knocking plate 24 corresponds to the lower end of the vertical rod 19, and the lower end of the vertical rod 19 passes through the supporting plate 8, and a torsion spring 25 is installed between the knocking plate 24 and the second fixed plate 23.

[0039] When the vertical rod 19 moves up and down, the vertically moving vertical rod 19 passes through the support through plate 8. At this time, the vertical rod 19 presses down on the knocking plate 24 inside the second fixing plate 23. The outer end of the knocking plate 24 is squeezed so that the inner end knocks on the support through plate 8. In this way, with the knocking of the knocking plate 24, it can cooperate with the vibration of the fuel filter itself to further ensure the dredging effect and avoid blockage. At the same time, when the vertical rod 19 rises, the knocking plate 24 is reset by the torsion spring 25 between the second fixing plate 23, further improving the knocking effect.

[0040] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fuel filter with high corrosion resistance and long service life, comprising a filter housing (1) and an oil inlet (2) connected to the lower end of the filter housing (1), and an oil outlet (3) is connected to the upper end of the filter housing (1). A central through column (4) is installed inside the filter housing (1), and a fuel filter paper (7) is arranged on the surface of the central through column (4). A pressure relief valve (5) is installed at the lower end of the central through column (4), and an oil return port (6) is connected to the bottom of the pressure relief valve (5); It is characterized in that: A contact plate (13) is arranged on the inner wall of the filter housing (1), and a contact protection mechanism is arranged between the contact plate (13) and the filter housing (1); A first fixing plate (20) is installed on the inner wall of the filter housing (1), and an auxiliary unfolding mechanism is arranged inside the first fixing plate (20); A knocking plate (24) is arranged on the inner wall of the filter housing (1), and an auxiliary dredging mechanism is installed at the middle end of the knocking plate (24).

2. The anti-corrosion and high-life fuel filter according to claim 1, characterized in that: Holes are evenly formed on the surface of the central through column (4), and the surface of the central through column (4) is bonded to the fuel filter paper (7). The material of the fuel filter paper (7) is made of polytetrafluoroethylene. A support through plate (8) is arranged at the lower end of the fuel filter paper (7), and the outer side of the support through plate (8) is fixedly installed on the inner wall of the filter housing (1).

3. The anti-corrosion and high-life fuel filter according to claim 1, wherein: The contact protection mechanism is provided with a vertical plate (9), the upper end of the vertical plate (9) is fixedly installed on the inner wall of the filter housing (1), a cross bar (10) is fixedly installed inside the vertical plate (9), and a compression block (11) is sleeved on the surface of the cross bar (10).

4. The fuel filter with high corrosion resistance and long service life according to claim 3, characterized in that: The lower end of the compression block (11) is rotatably installed with a movable plate (12), the bottom of the movable plate (12) is rotatably installed on the upper end of the contact plate (13), the shape of the contact plate (13) is arc-shaped, and the lower end of the contact plate (13) contacts the upper end of the fuel filter paper (7).

5. The anti-corrosion and high-life fuel filter according to claim 4, characterized in that: A regulating spring (14) is sleeved on the surface of the cross bar (10), the inner and outer sides of the regulating spring (14) are installed between the compression block (11) and the vertical plate (9), a damper (15) is installed at the middle end of the vertical plate (9), and the inner side of the damper (15) is fixedly installed on the outer side of the compression block (11).

6. The anti-corrosion and high-life fuel filter according to claim 1, wherein: The auxiliary unfolding mechanism is provided with an arc plate (17), the arc plate (17) is located at the outer upper end of the contact plate (13), a limiting block (18) is fixedly installed on the outer side of the arc plate (17), and the limiting block (18) is slidably connected to the inner wall of the filter housing (1). A pressure spring is arranged between the filter housing (1) and the limiting block (18).

7. The anti-corrosion and high-life fuel filter according to claim 6, characterized in that: A vertical rod (19) is fixedly installed at the lower end of the arc plate (17), and the vertical rod (19) corresponds to the folding part of the fuel filter paper (7). The vertical rods (19) evenly installed at the lower end of the arc plate (17) are located at the folding part of the fuel filter paper (7).

8. The anti-corrosion and high-life fuel filter according to claim 7, characterized in that: A telescopic sleeve block (21) is rotatably installed inside the vertical rod (19), and the telescopic sleeve block (21) is rotatably installed inside the first fixing plate (20). A corrector (22) is fixedly installed inside the telescopic sleeve block (21), and the shape of the corrector (22) is "T". The end of the corrector (22) corresponds to the folded inner wall of the fuel filter paper (7).

9. The fuel filter with high corrosion resistance and long service life according to claim 1, characterized in that: The auxiliary dredging mechanism is provided with a second fixing plate (23). The outer side of the second fixing plate (23) is fixedly installed on the inner wall of the filter housing (1). The inner side of the second fixing plate (23) is rotatably installed with a knocking plate (24), and the upper end of the knocking plate (24) corresponds to the lower end of the support through plate (8).

10. The fuel filter with high corrosion resistance and long service life according to claim 9, characterized in that: The outer side of the knocking plate (24) corresponds to the lower end of the vertical rod (19). The lower end of the vertical rod (19) penetrates through the support through plate (8). A torsion spring (25) is installed between the knocking plate (24) and the second fixing plate (23).

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