Low-pressure oil absorption oil filter with simple filter cartridge

Abstract

The utility model discloses a low-pressure oil absorption oil filter with a simple filter cartridge, which comprises a filter head, a filter element assembly, the filter cartridge, a central bolt, a first nut and a second nut, and the first nut and the second nut are mounted on the central bolt and used for tightly pressing and mounting the filter element assembly and the filter cartridge on the filter head. Through the design of the central bolt, the filter element assembly and the filter cartridge are very convenient to mount and dismount, a user can easily replace the filter cartridge and the filter element assembly only by dismounting the second nut and the first nut, the mounting structure of the filter cartridge is greatly simplified, the processing technology is simplified, the material cost and the production cost are remarkably reduced, and the filter cartridge is convenient to mount and dismount. Therefore, the product has higher cost performance in a low-pressure application environment, and is particularly suitable for being applied to an oil absorption oil filter.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a low-pressure oil suction filter with a simple filter cartridge. Background Art

[0002] Filters are essential components for conveying media, typically installed before pressure reducing valves, pressure relief valves, and water level control valves. As fluid passes through the filter, impurities are blocked. When cleaning is necessary, simply remove the filter cartridge, clean it, and reinstall it. This is a highly effective and easy-to-maintain device.

[0003] A Chinese patent application (Application Number: 202221201277.7, Application Date: May 18, 2022) discloses a radially sealed high-pressure filter. The filter head and filter cartridge are connected and secured using threads, and sealed with a radial elastic sealing ring. This design offers advantages such as a secure connection and good sealing, making it suitable for use in high-pressure environments. However, its disadvantages include difficulty in assembling and disassembling the filter cartridge and high processing costs. This disadvantage is particularly pronounced when applied to low-pressure oil suction filters, resulting in a low cost-performance ratio and significant performance loss. Utility Model Content

[0004] In order to reduce product costs and improve product cost performance, the utility model provides a low-pressure oil suction filter with a simple filter cartridge.

[0005] The technical solution adopted by the utility model is as follows: a low-pressure oil suction filter with a simple filter cartridge, comprising: a filter head, having a liquid inlet chamber, a filter cartridge chamber and a liquid outlet chamber connected in sequence; a filter element assembly is a cylindrical structure, the outer side of the cartridge is the filter front side, which is connected to the liquid inlet chamber, the center of the cartridge is the filter rear side, which is installed and connected to the filter cartridge chamber, and a first mounting hole is provided at one end of the filter element assembly away from the filter head; the filter cartridge is a cold-extruded one-piece shell with one end open and the other end closed, which is installed outside the filter element assembly, and a second mounting hole is provided at the closed end of the filter cartridge; a center bolt is installed as one piece with the filter head, extends along the center of the filter element assembly, and passes through the first mounting hole and the second mounting hole in sequence; a first nut and a second nut correspond to the positions of the first mounting hole and the second mounting hole respectively, and are installed on the center bolt for pressing the filter element assembly and the filter cartridge onto the filter head.

[0006] Preferably, it further comprises: a center sleeve, a cap-shaped structure, which is installed in the inner hole of the filter cartridge cavity in a threaded connection manner, the circumferential wall of the center sleeve is provided with an oil hole, and the center bolt is installed on the end wall of the center sleeve.

[0007] Preferably, a first seal, a second seal, a third seal, and a fourth seal are respectively provided between the filter element assembly and the filter head, between the filter cartridge and the filter head, between the filter element assembly and the first nut, and between the filter cartridge and the second nut.

[0008] Preferably, a one-way bypass valve is provided between the liquid inlet chamber and the liquid outlet chamber.

[0009] Preferably, the open end of the filter cartridge is provided with a flange.

[0010] Preferably, a conical top is provided at the closed end of the filter cartridge, and the second mounting hole is provided at the center of the conical top.

[0011] Preferably, a groove is punched on the cone top.

[0012] Preferably, a threaded connection hole is provided on the top or front of the filter head.

[0013] The utility model adopts the design of the center bolt, which makes the installation and disassembly of the filter element assembly and the filter cartridge very convenient. The user only needs to remove the second nut and the first nut to easily replace the filter cartridge and the filter element assembly, which greatly simplifies the installation structure of the filter cartridge, simplifies the processing technology, and significantly reduces the material cost and production cost, making this product more cost-effective in low-pressure application environments, and is particularly suitable for use in oil suction filters. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the present utility model.

[0015] Figure 2 It is a schematic top view of an embodiment of the present utility model.

[0016] Figure 3 This is a schematic AA cross-sectional view of an embodiment of the present utility model.

[0017] Figure 4 Schematic diagram of the filter element assembly in the embodiment of the present invention.

[0018] Figure 5 Schematic diagram of the filter cartridge in the embodiment of the present invention.

[0019] Figure 6 It is a schematic diagram of the center bolt and the center sleeve in the embodiment of the present utility model.

[0020] Filter head 1, liquid inlet cavity 101, filter cartridge cavity 102, liquid outlet cavity 103, threaded connection hole 104;

[0021] Filter element assembly 2, first mounting hole 201;

[0022] Filter cartridge 3, second mounting hole 301, flange edge 302, cone top 303, groove 304;

[0023] Center bolt 4;

[0024] First nut 5;

[0025] Second nut 6;

[0026] Center sleeve 7, oil hole 701;

[0027] First sealing member 8;

[0028] Second sealing member 9;

[0029] a third sealing member 10;

[0030] a fourth sealing member 11;

[0031] One-way bypass valve 12. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the embodiments and drawings.

[0033] In the embodiment, Figures 1 to 6 The figure shows a low-pressure oil suction filter with a simple filter cartridge, comprising: a filter head 1, having a liquid inlet chamber 101, a filter cartridge chamber 102 and a liquid outlet chamber 103 connected in sequence; a filter element assembly 2, which is a cylindrical structure, the outer side of the cylinder is the filter front side, which is connected to the liquid inlet chamber 101, the center of the cylinder is the filter rear side, which is installed and connected to the filter cartridge chamber 102, and a first mounting hole 201 is provided at the end of the filter element assembly 2 away from the filter head 1; the filter cartridge 3 is a cold-extruded one-piece shell with one end open and the other end closed, which is installed outside the filter element assembly 2, and a second mounting hole 301 is provided at the closed end of the filter cartridge 3; a center bolt 4 is installed as one piece with the filter head 1, extends along the center of the filter element assembly 2, and passes through the first mounting hole 201 and the second mounting hole 301 in sequence; a first nut 5 and a second nut 6 correspond to the positions of the first mounting hole 201 and the second mounting hole 301 respectively, and are installed on the center bolt 4 for pressing the filter element assembly 2 and the filter cartridge 3 on the filter head 1. The design of the central bolt 4 in this embodiment makes the installation and disassembly of the filter element assembly 2 and the filter cartridge 3 very convenient. The user only needs to remove the second nut 6 and the first nut 5 to easily replace the filter cartridge 3 and the filter element assembly 2, which greatly simplifies the installation structure of the filter cartridge 3, simplifies the processing technology, and significantly reduces the material cost and production cost, making this product more cost-effective in low-pressure application environments and particularly suitable for use in oil suction filters.

[0034] In the embodiment, Figure 3 、 Figure 6As shown, the filter cartridge 102 further includes a center sleeve 7, a cap-shaped structure, which is threadably mounted within the inner hole of the filter cartridge cavity 102. The circumferential wall of the center sleeve 7 is provided with oil holes 701, and the center bolt 4 is mounted on the end wall of the center sleeve 7. The center sleeve 7 of this embodiment provides a mounting position for the center bolt 4, which can be secured to the end wall of the center sleeve 7 by threading or welding to ensure a secure connection.

[0035] In the embodiment, Figure 3 As shown, a first seal 8, a second seal 9, a third seal 10, and a fourth seal 11 are respectively provided between the filter element assembly 2 and the filter head 1, between the filter cartridge 3 and the filter head 1, between the filter element assembly 2 and the first nut 5, and between the filter cartridge 3 and the second nut 6. This embodiment utilizes multiple seals to ensure the sealing performance of each sealing point, effectively preventing leakage and ensuring that the oil filter maintains good sealing during operation.

[0036] In the embodiment, Figure 3 As shown, a one-way bypass valve 12 is provided between the liquid inlet chamber 101 and the liquid outlet chamber 103. The one-way bypass valve 12 built into the filter head 1 automatically opens when the flow pressure difference between the liquid inlet chamber 101 and the liquid outlet chamber 103 is too large, thereby alleviating the flow pressure difference inside the filter and improving safety.

[0037] In the embodiment, Figure 3 、 Figure 5 As shown, the open end of the filter cartridge 3 is provided with a flange 302. The flange 302 can increase the contact area between the filter cartridge 3 and the filter head 1, thereby improving the stability of the installation and also improving the sealing performance.

[0038] In the embodiment, Figure 3 、 Figure 5 As shown, a conical top 303 is provided at the closed end of the filter cartridge 3, and the second mounting hole 301 is located at the center of the conical top 303. The design of the conical top 303 can improve the pressure resistance of the second mounting hole 301 under the action of the second nut 6, reduce the overall deformation of the filter cartridge 3, and thus improve the reliability of the structure.

[0039] In the embodiment, Figure 3 、 Figure 5 As shown, a groove 304 is stamped on the cone top 303. The groove 304 serves as a process groove for disassembly and assembly to prevent slippage during disassembly and assembly. At the same time, the groove 304 can also improve the overall rigidity of the cone top 303 and reduce deformation.

[0040] In the embodiment, Figures 1 to 3 As shown, the top or front of the filter head 1 is provided with a threaded connection hole 104. The threaded connection hole 104 is used to install and fix the filter, and can realize the selection installation of the filter in all directions, has the advantages of easy installation and disassembly, and can save installation space.

[0041] Obviously, the above embodiments of the present invention are merely examples for illustrating the present invention and are not intended to limit the implementation of the present invention. Other obvious changes or modifications derived from the essence of the present invention still fall within the scope of protection of the present invention.

Claims

1. A low-pressure oil suction filter with a simple filter cartridge, characterized in that: include: The filter head (1) has a liquid inlet cavity (101), a filter cartridge cavity (102), and a liquid outlet cavity (103) which are connected in sequence; The filter element assembly (2) is a cylindrical structure, the outer side of the cylinder is the filter front side, which is in communication with the liquid inlet cavity (101), the center of the cylinder is the filter rear side, which is installed and in communication with the filter cylinder cavity (102), and a first mounting hole (201) is provided at one end of the filter element assembly (2) away from the filter head (1); The filter cartridge (3) is a cold-extruded, one-piece housing with one end open and the other end closed, and is mounted outside the filter element assembly (2). The closed end of the filter cartridge (3) is provided with a second mounting hole (301); A central bolt (4) is integrally mounted with the filter head (1), extends along the center of the filter element assembly (2), and passes through the first mounting hole (201) and the second mounting hole (301) in sequence; The first nut (5) and the second nut (6) correspond to the positions of the first mounting hole (201) and the second mounting hole (301), respectively, and are mounted on the central bolt (4) to press the filter element assembly (2) and the filter cartridge (3) onto the filter head (1).

2. The low-pressure oil suction filter with a simple filter cartridge according to claim 1, characterized in that: Also includes: The center sleeve (7) is a cap-shaped structure and is installed in the inner hole of the filter cartridge cavity (102) in a threaded connection manner. The circumferential wall of the center sleeve (7) is provided with an oil hole (701), and the center bolt (4) is installed on the end wall of the center sleeve (7).

3. The low-pressure oil suction filter with a simple filter cartridge according to claim 1, characterized in that: A first seal (8), a second seal (9), a third seal (10), and a fourth seal (11) are respectively provided between the filter element assembly (2) and the filter head (1), between the filter cartridge (3) and the filter head (1), between the filter element assembly (2) and the first nut (5), and between the filter cartridge (3) and the second nut (6).

4. The low-pressure oil suction filter with a simple filter cartridge according to claim 1, characterized in that: A one-way bypass valve (12) is provided between the liquid inlet chamber (101) and the liquid outlet chamber (103).

5. The low-pressure oil suction filter with a simple filter cartridge according to claim 1, characterized in that: The open end of the filter cartridge (3) is provided with a flange edge (302).

6. The low-pressure oil suction filter with a simple filter cartridge according to claim 1, characterized in that: A conical top (303) is provided at the closed end of the filter cartridge (3), and the second mounting hole (301) is arranged at the center of the conical top (303).

7. The low-pressure oil suction filter with a simple filter cartridge according to claim 6, characterized in that: A groove (304) is punched on the cone top (303).

8. The low-pressure oil suction filter with a simple filter cartridge according to claim 1, characterized in that: A threaded connection hole (104) is provided on the top or front of the filter head (1).

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