Air filtering device

Abstract

The utility model discloses an air filtering device and relates to the field of air filtering devices for vehicle fuel tanks, the air filtering device comprises a mounting frame, a filter element is arranged on the outer surface of the mounting frame, a flow guide shell covers the mounting frame, and an opening is formed in the bottom of the flow guide shell; and the distance between the flow guide shell and the filter element is gradually reduced along the vertical flow direction of air. The distance between the flow guide shell and the filter element is gradually reduced in the vertical flow direction of the air, the air enters from the opening between the flow guide shell and the filter element, small particles can impact the inner wall of the shell and pop out, dust particles can be attached to the inner wall of the flow guide shell, and larger pollutants can be thrown out in advance due to the inertia effect, so that the air purification effect is improved. Therefore, dust, sand and stones in the air are effectively prevented from being easily sucked into the outer wall of the filter element, and the service life of the filter element is effectively prolonged.

Description

Technical Field

[0001] The present application relates to the field of air filter devices for vehicle fuel tanks, and in particular to an air filter device. Background Art

[0002] When negative pressure is generated in the fuel tank due to the oil suction of the oil pump, or when the pressure in the fuel tank is too high due to the evaporation of liquid oil due to temperature, the closed space inside the fuel tank needs to be connected to the external atmosphere to inhale air or discharge high-pressure gas. However, during the intake and exhaust process of the fuel tank, the dust in the air will affect the oil quality and aggravate the life loss of the liquid oil filter element.

[0003] Therefore, an air filter is usually installed at the opening of the fuel tank to filter the air and absorb the oil and gas generated during exhaust.

[0004] At present, when installing air filter devices on fuel tanks of large vehicles, dust and sand in the air are easily sucked into the outer wall of the filter element when the existing air filter for fuel tanks is in use, which will accelerate the failure of the filter element. Utility Model Content

[0005] In order to increase the service life of the filter element and prevent dust and sand in the air from being sucked into the outer wall of the filter element, the present application provides an air filtering device.

[0006] The present application provides an air filter device, which adopts the following technical solution:

[0007] An air filtering device comprises a mounting frame, a filter element is arranged on the outer surface of the mounting frame, a guide shell is arranged on the outer cover of the mounting frame, an opening is arranged at the bottom of the guide shell, and the distance between the guide shell and the filter element gradually decreases along the vertical flow direction of the air.

[0008] By adopting the above technical solution, the distance between the guide shell and the filter element gradually decreases along the vertical flow direction of the air, and the air enters through the opening between the guide shell and the filter element. Small particles will impact the inner wall of the shell and bounce out, while dust particles will adhere to the inner wall of the guide shell. Slightly larger pollutants will be thrown out in advance due to inertia, thereby effectively preventing dust and sand in the air from being easily sucked into the outer wall of the filter element, effectively improving the service life of the filter element.

[0009] Preferably, the mounting frame comprises an upper cover and a lower sleeve, a support structure is provided between the upper cover and the lower sleeve, and the support structure is used to coaxially fix the upper cover and the lower sleeve.

[0010] By adopting the above technical solution, the overall structure is simple, and the stability of the structure can be effectively improved through the supporting structure.

[0011] Preferably, the supporting structure includes a supporting frame, the bottom of the supporting frame is welded between the lower sleeves, the top of the supporting frame is located at the axis of the upper cover and a limiting bolt is fixedly provided, the limiting bolt is inserted into the upper cover, and the limiting bolt is threadedly connected to the upper cover, and the end of the limiting bolt away from the supporting frame is threadedly connected to the limiting nut.

[0012] By adopting the above technical solution, the support frame can effectively improve the bearing capacity of the entire structure, making it easier to hoist the entire structure.

[0013] Preferably, the support frame is a tripod.

[0014] By adopting the above technical solution, the stability of the structure is further improved.

[0015] Preferably, an annular cover is fixedly provided on the outer surface of the upper cover, an annular seat is fixedly provided on the outer surface of the lower sleeve, the filter element is provided between the annular cover and the annular seat, and two ends of the filter element are respectively abutted against the inner wall of the annular cover and the inner wall of the annular seat;

[0016] A first air flow channel is formed between the filter element and the inner wall of the guide shell, and a second air flow channel is formed inside the filter element and between the upper cover and the lower sleeve.

[0017] By adopting the above technical solution, the annular cover and the annular seat cooperate with each other to compress the filter element, effectively improving the stability of the filter element installation. In addition, the air enters from the first air flow channel, is filtered by the filter element, and then enters the oil tank through the second air flow channel. The entire air circulation process is simple and convenient.

[0018] Preferably, the guide housing is coaxially arranged on the upper cover, and the guide housing and the upper cover are fixedly connected, and a first sealing ring is arranged between the inner wall of the guide housing and the annular cover;

[0019] A mounting seat is arranged on the outer side of the lower casing and below the annular seat, and a second sealing ring is arranged between the mounting seat and the annular seat.

[0020] By adopting the above technical solution, the sealing performance between the upper cover and the lower sleeve and the filter element is further improved.

[0021] Preferably, an adjusting structure is provided at the bottom of the lower casing, and the adjusting structure is used to adjust the diameter of the lower casing and fix it at the opening of the oil tank.

[0022] By adopting the above technical solution, it is convenient to be applied to oil tank openings of different sizes, and the applicability of the device is effectively improved.

[0023] Preferably, the adjustment structure comprises an adjustment hoop, which is sleeved on the bottom of the lower sleeve. The lower sleeve is an elastic tube, and a plurality of adjustment grooves are provided on the bottom of the lower sleeve near the adjustment hoop and through the circumference.

[0024] By adopting the above technical solution, the adjusting clamp is adjusted according to the size of different oil tank openings, so that it can adjust the bottom of the lower casing. The bottom of the lower casing is deformed inward under pressure, and the adjustment groove is used to ensure the stability of the entire deformation process, thereby realizing the use of different oil tank opening sizes and further improving the applicability of the device.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The distance between the guide housing and the filter element gradually decreases along the vertical flow direction of the air. The air enters through the opening between the guide housing and the filter element. Small particles will impact the inner wall of the housing and pop out, while dust particles will adhere to the inner wall of the guide housing. Slightly larger pollutants will be thrown out in advance due to inertia, thereby effectively preventing dust and sand in the air from being easily sucked into the outer wall of the filter element, effectively improving the service life of the filter element;

[0027] 2. By adjusting the adjusting hoop, the bottom of the lower casing is adjusted. The bottom of the lower casing is deformed inward under pressure, and the adjustment groove ensures the stability of the entire deformation process, thereby realizing the use of different tank opening sizes and further improving the applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is an axonometric diagram mainly showing the overall structure of the air filter device in this embodiment;

[0029] Figure 2 This is a cross-sectional view mainly showing the structure of the air filter device in this embodiment;

[0030] Figure 3 This is an axial schematic diagram of the supporting structure of this embodiment.

[0031] Figure numerals: 1. Installation frame; 11. Upper cover; 12. Lower sleeve; 13. Support structure; 131. Support frame; 132. Limit bolt; 133. Limit nut; 14. Ring cover; 15. Ring seat; 2. Filter element; 3. Guide housing; 4. First air flow channel; 5. Second air flow channel; 6. First sealing ring; 7. Second sealing ring; 8. Adjustment structure; 81. Adjustment clamp; 82. Adjustment groove. DETAILED DESCRIPTION

[0032] The present application is further described in detail below in conjunction with the accompanying drawings.

[0033] The embodiment of the present application discloses an air filtering device.

[0034] Embodiment 1:

[0035] Reference Figure 1 and Figure 2 The air filter device includes a mounting frame 1, a filter element 2 is arranged on the outer surface of the mounting frame 1, a guide housing 3 is arranged on the outer cover of the mounting frame 1, a first air flow channel 4 is formed between the filter element 2 and the inner wall of the guide housing 3, and a second air flow channel 5 is formed inside the filter element 2. An adjustment structure 8 is arranged at the bottom of the mounting frame 1, and the adjustment structure 8 is used to adjust the size of the connection between the bottom of the mounting frame 1 and the oil tank opening. In this embodiment, the filter element 2 adopts a large cylindrical filter element 2, which can effectively meet the circulation and filtration of the large air flow.

[0036] Reference Figure 2 and Figure 3 The mounting frame 1 includes an upper cover 11 and a lower sleeve 12, and a support structure 13 is arranged between the upper cover 11 and the lower sleeve, and the support structure 13 is used to coaxially fix the upper cover 11 and the lower sleeve 12. It should be noted that the upper cover 11 and the lower sleeve 12 have the same diameter and are coaxially arranged, and the support structure 13 is supported between the upper cover 11 and the lower sleeve 12 to achieve indirect fixation between the upper cover 11 and the lower sleeve 12. The filter element 2 is sleeved between the upper cover 11 and the lower sleeve 12, wherein the inner diameter of the filter element 2 is the same as the diameter of the upper cover 11 and the lower sleeve 12, and the filter element 2 is sleeved between the upper cover 11 and the lower sleeve 12, and the upper and lower ends of the filter element 2 are respectively abutted against the upper cover 11 and the lower sleeve 12.

[0037] Specifically, an annular cover 14 is fixedly provided on the outer surface of the upper cover 11, an annular seat 15 is fixedly provided on the outer surface of the lower sleeve 12, the filter element 2 is provided between the annular cover 14 and the annular seat 15, and the two ends of the filter element 2 are respectively abutted against the inner wall of the annular cover 14 and the inner wall of the annular seat 15. The annular cover 14 and the annular seat 15 cooperate with each other to press the filter element 2, effectively improving the stability of the installation of the filter element 2.

[0038] Reference Figure 2 and Figure 3 The support structure 13 includes a support frame 131, the bottom of the support frame 131 is welded with the lower casing 12, the top of the support frame 131 is located at the axis of the upper cover 11 and fixed with a limit bolt 132, the limit bolt 132 is inserted into the upper cover 11, and the limit bolt 132 is threadedly connected to the upper cover 11, and one end of the limit bolt 132 away from the support frame 131 is threadedly connected to the limit nut 133. The support frame 131 is a tripod, and the structure of the tripod can further improve the stability of the support structure 13, and effectively avoid obstruction to air circulation during use.

[0039] Specifically, the bottom of the support frame 131 is a vertical structure and is welded to the inner wall of the lower casing 12 . The top of the support frame 131 is a platform. The limiting bolt 132 passes through the platform on the top of the support frame 131 from bottom to top and is threadedly connected to the support frame 131 .

[0040] Reference Figure 2 The bottom of the guide housing 3 is provided with an opening, and the distance between the guide housing 3 and the filter element 2 gradually decreases along the vertical flow direction of the air. The air enters through the opening between the guide housing 3 and the filter element 2, and small particles will impact the inner wall of the housing and be ejected, while dust particles will adhere to the inner wall of the guide housing 3, and slightly larger pollutants will be thrown out in advance due to inertia, thereby effectively preventing dust and sand in the air from being easily sucked into the outer wall of the filter element 2, and effectively improving the service life of the filter element 2.

[0041] Reference Figure 2 The flow guide housing 3 is coaxially arranged on the upper cover 11, and the flow guide housing 3 and the upper cover 11 are fixedly connected, and a first sealing ring 6 is arranged between the inner wall of the flow guide housing 3 and the annular cover 14. A mounting seat is arranged outside the lower sleeve 12 below the annular seat 15, and a second sealing ring 7 is arranged between the mounting seat and the annular seat 15. The first sealing ring 6 and the second sealing ring 7 effectively improve the sealing performance between the flow guide housing 3, the upper cover 11, the annular cover 14, the filter element 2, the annular seat 15 and the lower sleeve 12, and effectively improve the filtering performance of the device.

[0042] Reference Figure 2 and Figure 3 The adjustment structure 8 includes an adjustment hoop 81, which is sleeved on the bottom of the lower casing 12. The lower casing 12 is an elastic tube, and a plurality of adjustment grooves 82 are provided on the bottom of the lower casing 12 near the adjustment hoop 81. According to the size of the different tank openings, the adjustment hoop 81 is adjusted to adjust the bottom of the lower casing 12. The bottom of the lower casing 12 is deformed inward under pressure, and the adjustment groove 82 ensures the stability of the entire deformation process, thereby realizing the use of different tank opening sizes, and further improving the applicability of the device.

[0043] The implementation principle of an air filter device in the embodiment of the present application is as follows: air enters through the first air flow channel 4, passes through the filter element 2 into the second air flow channel 5, and then enters the fuel tank. During this process, small particles will impact the inner wall of the housing and be ejected, while dust particles will adhere to the inner wall of the guide housing 3, and slightly larger pollutants will be thrown out in advance due to inertia;

[0044] When installation is required for different tank opening sizes, the adjustment clamp 81 is adjusted to adjust the bottom of the lower casing 12. The bottom of the lower casing 12 is deformed inward under pressure, and the adjustment groove 82 ensures that the entire deformation process is stable, thereby achieving the use of different tank opening sizes.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An air filter device, characterized in that: It comprises a mounting frame (1), a filter element (2) being arranged on the outer surface of the mounting frame (1), a flow guide housing (3) being arranged on the outer cover of the mounting frame (1), an opening being arranged at the bottom of the flow guide housing (3), and a distance between the flow guide housing (3) and the filter element (2) gradually decreasing along the vertical flow direction of air; The mounting frame (1) comprises an upper cover (11) and a lower sleeve (12), wherein a support structure (13) is provided between the upper cover (11) and the lower sleeve, and the support structure (13) is used to coaxially and fixedly connect the upper cover (11) and the lower sleeve (12); The support structure (13) comprises a support frame (131), the bottom of the support frame (131) is welded to the lower sleeve (12), the top of the support frame (131) is located at the axis of the upper cover (11) and is fixedly provided with a limit bolt (132), the limit bolt (132) is inserted into the upper cover (11), and the limit bolt (132) is threadedly connected to the upper cover (11), and one end of the limit bolt (132) away from the support frame (131) is threadedly connected to the limit nut (133); An annular cover (14) is fixedly provided on the outer surface of the upper cover (11), an annular seat (15) is fixedly provided on the outer surface of the lower sleeve (12), the filter element (2) is arranged between the annular cover (14) and the annular seat (15), and two ends of the filter element (2) are respectively in contact with the inner wall of the annular cover (14) and the inner wall of the annular seat (15); A first air flow channel (4) is formed between the filter element (2) and the inner wall of the guide housing (3), and a second air flow channel (5) is formed inside the filter element (2) and between the upper cover (11) and the lower sleeve (12); An adjustment structure (8) is provided at the bottom of the lower casing (12), and the adjustment structure (8) is used to adjust the diameter of the lower casing (12) and fix it at the opening of the oil tank; The adjustment structure (8) comprises an adjustment hoop (81), wherein the adjustment hoop (81) is sleeved on the bottom of the lower sleeve (12); the lower sleeve (12) is an elastic tube; and a plurality of adjustment grooves (82) are provided on the bottom of the lower sleeve (12) near the adjustment hoop (81) and extending through the circumference thereof. The upper cover (11) and the lower sleeve (12) have the same diameter, the inner diameter of the filter element (2) is the same as the diameters of the upper cover (11) and the lower sleeve (12), and the filter element (2) is sleeved between the upper cover (11) and the lower sleeve (12).

2. An air filter device according to claim 1, characterized in that: The support frame (131) is a tripod.

3. An air filter device according to claim 1, characterized in that: The flow guide housing (3) is coaxially arranged on the upper cover (11), and the flow guide housing (3) and the upper cover (11) are fixedly connected, and a first sealing ring (6) is arranged between the inner wall of the flow guide housing (3) and the annular cover (14); A mounting seat is provided on the outer side of the lower casing (12) below the annular seat (15), and a second sealing ring (7) is provided between the mounting seat and the annular seat (15).

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