An air filter element support device

Abstract

The present invention provides an air filter element support device, which includes a bottom plate, a limit ring, a filter element support assembly, a rubber pad, a washer and a fastening nut. The bottom plate serves as the support part of the filter element support device, and the limit ring is welded above the bottom plate as the filter element installation part. The filter element support assembly is welded inside the ventilation holes of the limit ring and is used to install and fix the filter element. At the top of the screw of the filter element support assembly, a rubber pad, a washer and a fastening nut for pressing and fixing the filter element are installed. This device can achieve the stable fixation of the air filter element of special vehicles in the horizontal and vertical directions. Moreover, the filter element can be conveniently replaced by this device, which can solve the problem that it is difficult to replace the filter element of special vehicles. At the same time, this support device has the advantages of simple structure, small resistance, light overall weight and good installation processability.

Description

Technical Field

[0001] The present invention belongs to the technical field of intake air filtration for special vehicle engines, and particularly relates to a support device for an air filter element. Background Art

[0002] The engine is the core part of the power system of a special vehicle, and the air filter can filter out dust and sundries in the intake air to ensure clean air enters the engine. Usually, the air filter for special vehicles adopts a two-stage filtration method. The cyclone tube is used as the primary filter. The dusty air generates high-speed rotation through the blade airflow. Larger dust particles are separated from the airflow under the action of centrifugal force, and the separated dust is discharged outside the vehicle through a dust extraction pump. The relatively clean air enters the secondary filter. The secondary filter is generally in the form of a paper filter element. The paper filter has the advantages of high filtration efficiency, light weight, low cost, and convenient maintenance, and has been widely used. However, the paper filter element is generally circular in structure. The airflow enters from the periphery of the paper filter element and flows out from the middle of the filter element after passing through the pleated part. Therefore, it is necessary to consider both the realization of the filtering function of the paper filter element and the fixation, installation problems of the paper filter element in a limited space, as well as the convenience of replacing the filter element. Therefore, it is urgent to design a filter element support device that can meet the above functions. Summary of the Invention

[0003] (1) Technical Problems to be Solved

[0004] The present invention provides a support device for an air filter element of a special vehicle air filter, which can achieve good fixation of the air filter element of the special vehicle air filter in both the horizontal and vertical directions and improve the convenience of replacing the filter element.

[0005] (2) Technical Solutions

[0006] To solve the above technical problems, the present invention provides a support device for an air filter element, which includes a bottom plate, a limit ring, a filter element support assembly, a rubber pad, a washer, and a fastening nut. Among them,

[0007] The bottom plate serves as the support part of the filter element support device, and an air outlet hole is processed at the center position. The diameter of the air outlet hole is not less than the inner diameter of the limit ring.

[0008] The limit ring is welded above the bottom plate and serves as the filter element installation part. The limit ring is directly stamped from a steel plate and is in the shape of a frisbee. The outer diameter of the limit ring is larger than the outer diameter of the filter element. An air vent hole is processed at the center position of the limit ring. The air vent hole is coaxially arranged with the air outlet hole on the bottom plate. The inner diameter of the air vent hole is not greater than the inner diameter of the filter element. An upwardly bent part is provided on the outer periphery of the air vent hole, and together with the outer peripheral bent part of the limit ring, it forms an annular filter element installation limit groove.

[0009] The filter element support assembly is welded inside the vent hole of the limit ring and is used to install and fix the filter element; the filter element support assembly is integrally in a conical structure and includes a lower support ring, a middle support ring, an upper support ring, support pieces, a first reinforcing piece, a second reinforcing piece, a third reinforcing piece and a screw; among them, the outer diameter of the lower support ring is smaller than the diameter of the vent hole of the limit ring, and the filter element support assembly is welded inside the vent hole of the limit ring through the lower support ring; the outer diameter of the middle support ring is smaller than the inner diameter of the lower support ring, and the outer diameter of the upper support ring is smaller than the inner diameter of the middle support ring; the support piece is a narrow strip steel plate with three bent parts, and 4 support pieces are evenly distributed along the circumference at 90°, and the bottom, middle and top of each support piece are respectively welded and fixed to the lower support ring, the middle support ring and the upper support ring; two first reinforcing pieces are welded inside the lower support ring, each first reinforcing piece is formed by bending a narrow strip steel plate and has a dovetail structure, including a central bending part, flanging parts on both sides of the central bending part, and dovetail edges at the outer ends of each flanging part, the radius of the central bending part matches the diameter of the screw, the bending radius of the two flanging parts is 90°, and the two dovetail edges form a 90° angle; the first reinforcing piece is welded inside the lower support ring through the two dovetail edges and is welded and fixed to the screw located at the axis position of the filter element support assembly through the central bending part; the shapes of the second reinforcing piece and the third reinforcing piece are the same as that of the first reinforcing piece, only the sizes are different from the first reinforcing piece, and they are respectively welded inside the middle support ring and the upper support ring; the installation angles of the three kinds of reinforcing pieces are the same, and the fixed positions of the flanging parts of each reinforcing piece are at a 45° angle with the support piece; the screw is arranged at the axis position of the filter element support assembly, the length of the screw is greater than the height of the filter element, and the upper, middle and lower parts of the screw are respectively welded and fixed to the central bending parts of the third reinforcing piece, the second reinforcing piece and the first reinforcing piece; a threaded part is processed at the top end of the screw, and a rubber pad, a washer and a fastening nut for pressing and fixing the filter element are installed on the threaded part.

[0010] Further, the distance between the middle support ring and the lower support ring is 1 / 3 of the height of the filter element.

[0011] Further, the distance between the upper support ring and the lower support ring is 3 / 4 of the height of the filter element.

[0012] Further, the bottom of the support piece is welded inside the lower support ring, the middle of the support piece is welded outside the middle support ring, and the top of the support piece is welded inside the upper support ring.

[0013] Further, the fastening nut adopts the way of opposed nuts.

[0014] (III) Beneficial effects

[0015] The present invention provides a support device for an air filter element, which includes a bottom plate, a limit ring, a filter element support assembly, a rubber pad, a washer and a fastening nut. The bottom plate serves as the support part of the filter element support device, and the limit ring is welded above the bottom plate as the filter element installation part. The filter element support assembly is welded inside the vent holes of the limit ring for installing and fixing the filter element. At the top of the screw of the filter element support assembly, a rubber pad, a washer and a fastening nut for pressing and fixing the filter element are installed. This device can achieve stable fixation of the air filter element of special vehicles in the horizontal and vertical directions, and it is convenient to replace the filter element, which can solve the problem that it is not easy to replace the filter element of special vehicles. At the same time, the support device has the advantages of simple structure, small resistance, light overall weight and good installation processability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the filter element support device according to an embodiment of the present invention;

[0017] Figure 2 is a schematic diagram of the structure of the limit ring in an embodiment of the present invention;

[0018] Figure 3 is a schematic diagram of the structure of the filter element support assembly in an embodiment of the present invention;

[0019] Figure 4 is a schematic diagram of the structure of the support piece in an embodiment of the present invention;

[0020] Figure 5 is a schematic diagram of the structure of the first reinforcing piece in an embodiment of the present invention;

[0021] Figure 6 is a schematic diagram of the included angle between the reinforcing piece and the support piece in an embodiment of the present invention;

[0022] Figure 7 is a schematic diagram of the working principle of the filter element support device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the objectives, contents and advantages of the present invention clearer, the following further describes in detail the specific embodiments of the present invention with reference to the drawings and embodiments.

[0024] This embodiment provides a support device for an air filter element, and its structure is as Figure 1 shown, mainly including a bottom plate 1, a limit ring 2, a filter element support assembly 3, a rubber pad 4, a washer 5 and a fastening nut 6.

[0025] The bottom plate 1 serves as the support part of the filter element support device and is made of a steel plate with a thickness of 2 mm. An air outlet hole is processed at the center position, and the diameter of the air outlet hole is not less than the inner diameter of the limit ring 2, which is convenient for the air flow to flow out smoothly from the filter element.

[0026] The limiting ring 2 is welded above the bottom plate 1 and serves as the filter element installation part. As Figure 2 shown, the limiting ring 2 is directly stamped from a steel plate and is in the shape of a frisbee, with a total height of 15 mm. The outer diameter of the limiting ring 2 is larger than the outer diameter of the filter element. A ventilation hole is machined at the center position of the limiting ring 2, and the ventilation hole is coaxially arranged with the air outlet hole on the bottom plate 1. The inner diameter of the ventilation hole is not larger than the inner diameter of the filter element. The outer periphery of the ventilation hole has an upwardly bent part, which forms an annular filter element installation limiting groove with the outer periphery bent part of the limiting ring 2.

[0027] The filter element support assembly 3 is welded inside the ventilation hole of the limiting ring 2 for installing and fixing the filter element. As Figure 3 shown, the filter element support assembly 3 is in an overall conical structure for easy disassembly of the filter element, and includes a lower support ring 301, a middle support ring 302, an upper support ring 303, support pieces 304, a first reinforcing piece 305, a second reinforcing piece 306, a third reinforcing piece 307, and a screw 308. Among them, the height of the lower support ring 301 is 30 mm, the outer diameter of the lower support ring 301 is smaller than the diameter of the ventilation hole of the limiting ring 2, and the filter element support assembly 3 is welded inside the ventilation hole of the limiting ring 2 through the lower support ring 301. The height of the middle support ring 302 is 20 mm, and the outer diameter is slightly smaller than the inner diameter of the lower support ring 301. The distance between the middle support ring 302 and the lower support ring 301 is 1 / 3 of the filter element height. The height of the upper support ring 303 is 20 mm, and the outer diameter is 1 / 3 of the outer diameter of the lower support ring 301. The distance between the upper support ring 303 and the lower support ring 301 is 3 / 4 of the filter element height.

[0028] The structure of the support piece 304 is as Figure 4 shown, and it is a narrow strip steel plate with three bent parts. Four support pieces 304 are evenly distributed along the circumference at 90°. The bottom, middle, and top of each support piece 304 are respectively welded and fixed to the lower support ring 301, the middle support ring 302, and the upper support ring 303. Among them, the bottom of the support piece 304 is welded inside the lower support ring 301, the middle of the support piece 304 is welded outside the middle support ring 302, and the top of the support piece 304 is welded inside the upper support ring 303, thereby improving the connection strength between the support piece 304 and the three support rings.

[0029] Two first reinforcing pieces 305 are welded inside the lower support ring 301. As Figure 5As shown, each first reinforcing piece 305 is formed by bending a narrow strip of steel plate and has a dovetail structure, including a central bending portion, flanging portions located on both sides of the central bending portion, and dovetail edges located at the outer ends of each flanging portion. Among them, the radius of the central bending portion matches the diameter of the screw 308, the bending radius of the two flanging portions is 90°, and the two dovetail edges form a 90° angle. The first reinforcing piece 305 is welded inside the lower support ring 301 through the two dovetail edges, and is fixedly welded to the screw 308 located at the axis position of the filter element support assembly 3 through the central bending portion.

[0030] The shapes of the second reinforcing piece 306 and the third reinforcing piece 307 are the same as that of the first reinforcing piece 305, only the sizes are different from those of the first reinforcing piece 305, and they are respectively welded inside the middle support ring 302 and the upper support ring 303. The installation angles of the three reinforcing pieces are the same, and the fixed positions of the flanging portions of each reinforcing piece form a 45° angle with the support piece 304, as Figure 6 shown.

[0031] The screw 308 is arranged at the axis position of the filter element support assembly 3, with a diameter of 20 mm, and the length of the screw 308 is greater than the height of the filter element. The upper, middle, and lower parts of the screw 308 are respectively fixedly welded to the central bending portions of the third reinforcing piece 307, the second reinforcing piece 306, and the first reinforcing piece 305. A threaded portion is machined at the top end of the screw 308, and a rubber pad 4, a washer 5, and a fastening nut 6 for pressing and fixing the filter element are installed on the threaded portion. Among them, the fastening nut 6 adopts the way of opposing nuts, which can play a role in preventing loosening.

[0032] When installing the filter element, as Figure 7 shown, the filter element is sleeved outside the filter element support assembly 3 and the bottom is stuck in the filter element installation limit groove of the limit ring 2, and the filter element can be pressed and fixed by using the rubber pad 4, the washer 5, and the fastening nut 6. When replacing the filter element, only the standard parts such as the fastening nut 6 and the washer 5 need to be loosened, and then the filter element can be removed, and the disassembly and assembly are simple and convenient.

[0033] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. An air filter element support device, characterized in that, The filter element support device includes a bottom plate, a limit ring, a filter element support assembly, a rubber pad, a washer, and a fastening nut; among them, The bottom plate serves as the support part of the filter element support device, and an air outlet hole is machined at the center position. The diameter of the air outlet hole is not less than the inner diameter of the limit ring; The limit ring is welded above the bottom plate and serves as the filter element installation part; the limit ring is directly stamped from a steel plate and is in the shape of a frisbee. The outer diameter of the limit ring is greater than the outer diameter of the filter element; an air vent hole is machined at the center position of the limit ring. The air vent hole is coaxially arranged with the air outlet hole on the bottom plate, and the inner diameter of the air vent hole is not greater than the inner diameter of the filter element; an upward bending part is provided on the outer periphery of the air vent hole, and an annular filter element installation limit groove is formed with the outer peripheral bending part of the limit ring; The filter element support assembly is welded inside the air vent hole of the limit ring and is used to install and fix the filter element; the filter element support assembly is integrally in a conical structure and includes a lower support ring, a middle support ring, an upper support ring, support pieces, a first reinforcing piece, a second reinforcing piece, a third reinforcing piece, and a screw; among them, the outer diameter of the lower support ring is smaller than the diameter of the air vent hole of the limit ring, and the filter element support assembly is welded inside the air vent hole of the limit ring through the lower support ring; the outer diameter of the middle support ring is smaller than the inner diameter of the lower support ring, and the outer diameter of the upper support ring is smaller than the inner diameter of the middle support ring; the support piece is a narrow strip steel plate with three bending parts. Four support pieces are evenly distributed along the circumference at 90°. The bottom of each support piece is welded inside the lower support ring, the middle of each support piece is welded outside the middle support ring, and the top of each support piece is welded inside the upper support ring; two first reinforcing pieces are welded inside the lower support ring. Each first reinforcing piece is bent from a narrow strip steel plate and has a dovetail structure, including a central bending part, flanging parts located on both sides of the central bending part, and dovetail edges located at the outer ends of each flanging part. The radius of the central bending part matches the diameter of the screw. The bending radius of the two flanging parts is 90°, and the two dovetail edges form a 90° angle; the first reinforcing piece is welded inside the lower support ring through the two dovetail edges and is fixedly welded with the screw located at the axis position of the filter element support assembly through the central bending part; the shapes of the second reinforcing piece and the third reinforcing piece are the same as those of the first reinforcing piece, only the sizes are different from those of the first reinforcing piece, and they are respectively welded inside the middle support ring and the upper support ring; the installation angles of the three reinforcing pieces are the same, and the fixed positions of the flanging parts of each reinforcing piece are at a 45° angle with the support pieces; the screw is arranged at the axis position of the filter element support assembly. The length of the screw is greater than the height of the filter element. The upper, middle, and lower parts of the screw are respectively welded and fixed with the central bending parts of the third reinforcing piece, the second reinforcing piece, and the first reinforcing piece; a threaded part is machined at the top of the screw, and a rubber pad, a washer, and a fastening nut for pressing and fixing the filter element are installed on the threaded part. The fastening nut adopts the way of opposing nuts.

2. The filter element support device according to claim 1, characterized in that, The distance between the middle support ring and the lower support ring is 1 / 3 of the height of the filter element.

3. The filter element support device according to claim 1, characterized in that, The distance between the upper support ring and the lower support ring is 3 / 4 of the height of the filter element.

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