Filter element with integrated bypass valve and spin-on filter

Abstract

The utility model provides a filter core and spin -on filter of integrated bypass valve, wherein, the filter core includes filter drum, is fixedly arranged with the center tube in the filter drum, and the bypass valve is innovated in the lower end of center tube, makes the center tube and the valve seat of bypass valve, valve cover all by the plastic material quality manufacture, avoids using metal parts in the filter core clean side, has improved the filter initial cleaning.

Description

Technical Field

[0001] This utility model relates to accessories for spin-on filters, specifically to a filter element with an integrated bypass valve and a spin-on filter. Background Technology

[0002] In the design of oil filters, when the filter element resistance is too high and it is due for replacement, a bypass valve installed in the filter element is activated to ensure normal oil supply to the system, allowing the oil to pass directly through the filter element without filtration. CN221323420U discloses a bypass valve structure and an oil filter, which includes a central tube made of a perforated metal plate and a bypass valve structure integrated on a metal substrate. This results in metal parts on the clean side of the filter, thus affecting the initial cleanliness of the filter. Utility Model Content

[0003] To address the problems in the existing technology, this utility model provides a filter element with an integrated bypass valve and a spin-on filter, which improves the initial cleanliness of the cleaning side.

[0004] A filter element with an integrated bypass valve includes a vertically arranged filter cartridge, a central tube fixedly disposed inside the filter cartridge, a valve seat integrally disposed at the lower end of the central tube, a bypass hole at the top of the valve seat, a guide ring disposed within the bypass hole, a liquid passage gap being provided between the outer wall of the guide ring and the inner wall of the bypass hole for liquid to pass through, the outer wall of the guide ring being integrally connected to the inner wall of the bypass hole via connecting blocks distributed on its circumference, a guide rod being disposed through the guide ring and slidingly engaged therewith, a valve cover for sealing the bypass hole being integrally disposed at the upper end of the guide rod, a compression spring being movably sleeved on the guide rod, the lower end of the compression spring being engaged with the lower end of the guide rod, the upper end of the compression spring abutting against the guide ring, the valve cover sealing the bypass hole, and forming a bypass valve structure at the lower end of the central tube; the central tube, valve seat, valve cover, and guide rod are all made of plastic.

[0005] Furthermore, the valve seat includes a first ring body, an annular disc body, and a second ring body connected in sequence. The outer radius of the second ring body is smaller than the inner radius of the first ring body, thereby forming a trumpet-shaped structure. The first ring body overlaps with the lower part of the central tube and is integrally connected. The central hole of the second ring body is the bypass hole.

[0006] Furthermore, the annular disk has a conical structure.

[0007] Furthermore, the central tube has a skeleton structure.

[0008] A spin-on filter includes a cylindrical body with an open top, a filter element with an integrated bypass valve as described above disposed inside the cylindrical body, a flange fixedly connected to the port of the cylindrical body, oil inlet holes communicating with the interior of the cylindrical body distributed on the flange, an oil outlet connector disposed in the middle of the flange, the oil outlet connector communicating with the upper port of the filter element, the oil outlet connector and the upper port of the filter element being sealed by a sealing ring, and a second compression spring being supported between the lower part of the filter element and the bottom surface of the cylindrical body.

[0009] The beneficial effects of this utility model are as follows: the central tube and bypass valve are made of plastic, which reduces the use of metal parts on the cleaning side and improves the initial cleanliness of the filter; in addition, the central tube integrates the bypass valve function, which reduces the number of parts used and facilitates assembly. Attached Figure Description

[0010] Figure 1 This is a cross-sectional view of the filter element with an integrated bypass valve in this utility model; Figure 2 This is a cross-sectional view of the spin-on filter in this utility model. Detailed Implementation

[0011] The present invention will now be described in detail with reference to the accompanying drawings. Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The directional terms such as left, center, right, top, and bottom in the embodiments of the present invention are only relative concepts or referenced to the normal use state of the product, and should not be considered restrictive.

[0012] A filter element with an integrated bypass valve, such as Figure 1As shown, the filter includes a vertically arranged filter cartridge 1 made of corrugated filter paper. A central tube 2 is fixedly installed inside the filter cartridge 1. The central tube 2 is preferably a skeleton structure and is used to support the inner wall of the filter cartridge 1. A valve seat 3 is integrally installed at the lower end of the central tube 2. A bypass hole 34 is opened at the top of the valve seat 3. A guide ring 4 is installed in the bypass hole 34. A liquid passage gap is left between the outer wall of the guide ring 4 and the inner wall of the bypass hole 34 for liquid to pass through. The outer wall of the guide ring 4 is integrally connected to the inner wall of the bypass hole 34 through connecting blocks 41 distributed on its circumference. The connection includes a guide rod 5 that runs through and slides within the guide ring 4. A valve cover 51 for sealing the bypass hole 34 is integrally provided at the upper end of the guide rod 5. A compression spring 61 is movably sleeved on the guide rod 5. The lower end of the compression spring 61 is engaged in the engagement groove 52 at the lower end of the guide rod 5, and the upper end of the compression spring 61 abuts against the guide ring 4. The valve cover 51 seals the bypass hole 34, forming a bypass valve structure at the lower end of the central tube 2. The central tube 2, valve seat 3, valve cover 51, and guide rod 5 are all made of plastic.

[0013] The valve seat 3 includes a first ring body 31, an annular disc body 32, and a second ring body 33 connected in sequence. The outer radius of the second ring body 33 is smaller than the inner radius of the first ring body 31. The annular disc body 32 is preferably a conical structure, so that the valve seat 3 forms a trumpet-shaped structure, thereby making the integrated structure of the filter element and the bypass valve more compact. The first ring body 31 is integrally connected to and overlaps with the lower part of the central tube 2, and the central hole of the second ring body 33 is the bypass hole 34.

[0014] A spin-on filter, combined with Figure 2 As shown, the device includes a cylindrical body 7 with an opening at the top. Inside the cylindrical body 7, a filter element 100 with the aforementioned integrated bypass valve is installed. A flange 8 is fixedly connected to the port of the cylindrical body 7. Oil inlet holes 81 communicating with the interior of the cylindrical body 7 are distributed on the flange 8. An oil outlet connector 82 is provided in the middle of the flange 8. The oil outlet connector 82 is connected to the upper port of the filter element 100. The oil outlet connector 82 and the upper port of the filter element 100 are sealed by a sealing ring 9. A second compression spring 62 is supported between the lower part of the filter element 100 and the bottom surface of the cylindrical body 7.

[0015] During use, oil enters the cylinder 7 through the oil inlet hole from the upstream oil passage. When the filter element 100 is working normally, the pressure difference across the bypass valve is low and less than the spring force of the compression spring 61. Therefore, under the action of the spring force of the compression spring 61, the bypass valve is in the closed state. The oil to be filtered between the inner wall of the cylinder 7 and the filter element 100 can only be filtered by the filter cylinder 1 before entering the filter element 100, and then discharged into the downstream oil passage through the oil outlet connector 82. The clean side of the filter element 100 in this filter is made of plastic, avoiding the use of metal materials and improving the initial cleanliness of the filter. When filter element 100 becomes clogged, the pressure difference across the bypass valve increases and exceeds the elastic force of compression spring 61. The bypass valve is in the open state, and the oil to be filtered can still enter the interior of filter element 100 directly through the bypass valve.

[0016] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A filter element with an integrated bypass valve, comprising a vertically arranged filter cartridge, wherein a central tube is fixedly disposed within the filter cartridge, characterized in that: A valve seat is integrally installed at the lower end of the central tube, and a bypass hole is opened at the top of the valve seat. A guide ring is installed in the bypass hole, and a liquid passage gap is left between the outer wall of the guide ring and the inner wall of the bypass hole for liquid to pass through. The outer wall of the guide ring is integrally connected to the inner wall of the bypass hole through connecting blocks distributed on its circumference. A guide rod is inserted through the guide ring and slides with it. A valve cover for sealing the bypass hole is integrally installed at the upper end of the guide rod. A compression spring is movably sleeved on the guide rod. The lower end of the compression spring is engaged with the lower end of the guide rod, and the upper end of the compression spring abuts against the guide ring. The valve cover seals the bypass hole, forming a bypass valve structure at the lower end of the central tube. The central tube, valve seat, valve cover, and guide rod are all made of plastic.

2. The filter element with an integrated bypass valve according to claim 1, characterized in that: The valve seat includes a first ring body, an annular disc body, and a second ring body connected in sequence. The outer radius of the second ring body is smaller than the inner radius of the first ring body, thereby forming a trumpet-shaped structure. The first ring body overlaps with the lower part of the central tube and is integrated into the valve seat. The central hole of the second ring body is the bypass hole.

3. The filter element with an integrated bypass valve according to claim 2, characterized in that: The annular disk has a conical structure.

4. The filter element with an integrated bypass valve according to claim 1, characterized in that: The central tube has a skeleton structure.

5. A spin-on filter, comprising a cylindrical body with an open top, a filter element with the aforementioned integrated bypass valve disposed within the cylindrical body, a flange fixedly connected to the port of the cylindrical body, oil inlet holes communicating with the interior of the cylindrical body distributed on the flange, an oil outlet connector disposed in the middle of the flange, the oil outlet connector communicating with the upper port of the filter element, the oil outlet connector being sealed to the upper port of the filter element by a sealing ring, and a second compression spring being supported between the lower part of the filter element and the bottom surface of the cylindrical body.

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