Parallel multi-stage fuel filter

Abstract

The utility model relates to the technical field of fuel oil filtering, and discloses a parallel multi-stage fuel oil filter which comprises a filter cartridge shell, a connecting assembly is arranged on the outer wall of the filter cartridge shell, one end of the filter cartridge shell is fixedly connected with a top cover, and a pipeline assembly is arranged in the top cover. The pipeline assembly comprises an oil outlet pipe, one end of the oil outlet pipe is fixedly connected to the interior of the top cover, a connecting pipe is fixedly connected to the interior of the top cover, an oil inlet pipe is fixedly connected to the interior of the connecting pipe, a plurality of filter elements are slidably connected to the interior of the filter cartridge shell, and a maintenance cover is arranged at the other end of the filter cartridge shell. According to the utility model, fuel oil enters the filter cartridge shell through the oil inlet pipe, flows into the filter element in the filter cartridge shell on the other side through the connecting pipe to be filtered, and flows out of the gap between the filter cartridge shell and the filter element to be discharged through the oil outlet pipe, so that the effect of improving the filtering efficiency is achieved; the problem that a fuel filter is poor in filtering efficiency through a single filter cartridge is solved, and the filtering efficiency of the filter is improved.

Description

Technical Field

[0001] This utility model relates to the field of fuel filtration technology, and in particular to a parallel multi-stage fuel filter. Background Technology

[0002] With the continuous development of internal combustion engine technology, fuel systems place higher demands on fuel cleanliness. Fuel often contains impurities such as metal shavings, dust, and moisture. If these impurities enter the engine combustion chamber without adequate filtration, they can cause clogging of the fuel injection system, increased wear, and even engine performance degradation or damage. Therefore, the fuel filter, as a key component ensuring the cleanliness of the fuel system, directly affects the stable operation and service life of the engine, and has significant application value and research significance. This invention proposes a parallel multi-stage fuel filter, aiming to optimize the traditional fuel filtration path, improve overall filtration efficiency, and meet the needs of high-performance engines.

[0003] Current fuel filters generally employ a single filter cartridge structure. Fuel enters the filter housing through the inlet, where it is filtered by the filter media of the cartridge to trap impurities before being discharged clean fuel through the outlet. In some designs, the filter cartridge is fixed in the center of the housing, and fuel typically flows from the outside of the cartridge to the inside or vice versa before being discharged to downstream systems. These designs generally offer advantages such as compact size, ease of manufacturing, and simple structure, and are widely used in traditional vehicles and low-power equipment.

[0004] However, existing fuel filters with a single filter cartridge structure suffer from low filtration efficiency, easy clogging of the filter element, and shortened service life when handling large flow rates or highly contaminated fuel. Especially under continuous operation or complex operating conditions, a single filter cartridge cannot simultaneously ensure filtration accuracy and flow stability, resulting in some impurities not being effectively trapped, affecting the stability of the downstream fuel injection system and the working efficiency of the engine. There is an urgent need to improve the fuel filter structure to enhance the filtration effect. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a parallel multi-stage fuel filter, which aims to improve the poor filtration efficiency of fuel filters using a single filter cartridge.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a parallel multi-stage fuel filter, including a filter cartridge housing, a connecting assembly provided on the outer wall of the filter cartridge housing, a top cover fixedly connected to one end of the filter cartridge housing, and a pipeline assembly provided inside the top cover;

[0007] The pipeline assembly includes an oil outlet pipe, one end of which is fixedly connected to the inside of the top cover. A connecting pipe is fixedly connected inside the top cover, and an oil inlet pipe is fixedly connected inside the connecting pipe. Multiple filter elements are slidably connected inside the filter cartridge housing. A maintenance cover is provided at the other end of the filter cartridge housing, and a sealing assembly is provided between the maintenance cover and the filter cartridge housing.

[0008] As a further description of the above technical solution:

[0009] The connecting assembly includes a fixing frame, one side of which is fixedly connected to the outer wall of the filter cartridge housing, and the filter cartridge housing is symmetrically arranged and fixedly connected to one side of the fixing frame.

[0010] As a further description of the above technical solution:

[0011] The sealing assembly includes a sealing ring, which is fitted inside the maintenance cover, and the outer wall of the maintenance cover is in contact with the other end of the filter cartridge housing.

[0012] As a further description of the above technical solution:

[0013] The filter cartridge housing and the outer wall of the maintenance cover are fitted with a cover clamp, and a handle is fixedly connected to the bottom of the maintenance cover.

[0014] As a further description of the above technical solution:

[0015] One end of one of the filter elements is fixedly connected to a connecting tube, and the connecting tube is slidably connected inside the other filter element.

[0016] As a further description of the above technical solution:

[0017] The filter element is used to filter fuel.

[0018] As a further description of the above technical solution:

[0019] The handle is used to facilitate the separation of the maintenance cover from the filter cartridge housing.

[0020] As a further description of the above technical solution:

[0021] The cylinder cover clamp is used to fix the filter cylinder shell and the maintenance cover.

[0022] This utility model has the following beneficial effects:

[0023] In this invention, fuel first enters the filter cartridge housing through the inlet pipe, and then flows into the filter cartridge housing on the other side through the cavity on one side of the filter cartridge housing via the connecting pipe. The fuel enters the interior through the middle of the filter element for filtration, and after filtration, the fuel flows out from the gap between the filter cartridge housing and the filter element and is discharged through the outlet pipe. This achieves the effect of improving filtration efficiency, solves the problem of poor filtration efficiency of fuel filters using a single filter cartridge, and improves the filtration efficiency of fuel filters. Attached Figure Description

[0024] Figure 1 This is a perspective view of a parallel multi-stage fuel filter proposed in this utility model;

[0025] Figure 2 This is a schematic diagram of the mounting frame structure for a parallel multi-stage fuel filter proposed in this utility model;

[0026] Figure 3 This is a schematic diagram of the internal structure of the filter cartridge housing of a parallel multi-stage fuel filter proposed in this utility model.

[0027] Figure 4 This is a schematic diagram of the internal structure of the filter element of a parallel multi-stage fuel filter proposed in this utility model.

[0028] Figure 5 This is a schematic diagram of the maintenance cover structure of a parallel multi-stage fuel filter proposed in this utility model;

[0029] Figure 6 This is a plan view of the internal structure of the filter cartridge housing of a parallel multi-stage fuel filter proposed in this utility model.

[0030] Legend:

[0031] 1. Filter cartridge housing; 2. Fixing frame; 3. Top cover; 4. Oil inlet pipe; 5. Connecting pipe; 6. Oil outlet pipe; 7. Filter element; 8. Cover clamp; 9. Connecting pipe; 10. Maintenance cover; 11. Handle; 12. Sealing ring. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1-6The present invention provides an embodiment of a parallel multi-stage fuel filter, comprising a filter housing 1, which is used to accommodate multiple filter elements 7 and provide a sealed filtration space. A connecting component is provided on the outer wall of the filter housing 1, which is used to connect multiple filter housings 1 in parallel to adapt to different flow requirements. A top cover 3 is fixedly connected to one end of the filter housing 1. The top cover 3 is used to close the upper opening of the filter housing 1 and serve as the mounting base for the pipeline assembly. The pipeline assembly is provided inside the top cover 3.

[0034] The piping assembly includes an outlet pipe 6, which is used to export the fuel filtered by the filter element 7 to the downstream system. One end of the outlet pipe 6 is fixedly connected to the inside of the top cover 3 to achieve a stable oil circuit connection. A connecting pipe 5 is fixedly connected inside the top cover 3 to enable oil flow between filter cartridges, thereby achieving multi-stage parallel filtration. An inlet pipe 4 is fixedly connected inside the connecting pipe 5 to introduce external fuel into the filter system. Multiple filter elements 7 are slidably connected inside the filter cartridge housing 1. The filter elements 7 sequentially intercept and finely filter particulate impurities in the fuel to improve fuel cleanliness. A maintenance cover 1 is provided at the other end of the filter cartridge housing 1. 0. The maintenance cover 10 is used to seal the bottom of the filter cartridge housing 1 and provide a passage for inspection and maintenance. A sealing assembly is provided between the maintenance cover 10 and the filter cartridge housing 1. The sealing assembly ensures the sealing of fuel during high-pressure transportation and prevents leakage. The connecting assembly includes a fixing bracket 2, which is used to support the filter structure as a whole and achieve stable installation. One side of the fixing bracket 2 is fixedly connected to the outer wall of the filter cartridge housing 1, which facilitates the filter cartridge housing 1 to be firmly fixed to the equipment bracket or the inner wall of the housing. The filter cartridge housing 1 is symmetrically arranged and fixedly connected to one side of the fixing bracket 2. The symmetrical arrangement achieves balanced force distribution during filter operation and avoids uneven loading. The sealing assembly includes... A sealing ring 12 provides an annular seal at the connection between the maintenance cover 10 and the filter cartridge housing 1. The sealing ring 12 is fitted inside the maintenance cover 10 to enhance its tightness. The outer wall of the maintenance cover 10 fits snugly against the other end of the filter cartridge housing 1, forming an integral, secure structure that effectively prevents leakage at the joint. A cover clamp 8 is fitted between the filter cartridge housing 1 and the outer wall of the maintenance cover 10, providing external clamping force to ensure a secure connection of the maintenance cover 10 during operation. A handle 11 is fixedly connected to the bottom of the maintenance cover 10, facilitating manual disassembly and improving maintenance convenience. One end of the filter element 7 is fixedly connected to a connecting pipe 9. The connecting pipe 9 realizes the series connection between the filter elements 7, improving the overall integrity of the filter structure. The connecting pipe 9 is slidably connected inside another filter element 7, which facilitates length adjustment during assembly and disassembly, improving component adaptability. The filter element 7 is used to filter fuel. The structure of the graded filter element 7 improves the interception ability of impurities of different particle sizes. The handle 11 is used to facilitate the separation of the maintenance cover 10 from the filter cartridge housing 1, which is convenient for maintenance or filter element 7 replacement. The cover clamp 8 is used to fix the filter cartridge housing 1 and the maintenance cover 10 to prevent loosening or detachment caused by vibration during operation.

[0035] Working principle: When using this parallel multi-stage fuel filter, multiple filter elements 7 are first connected by connecting pipes 9 inserted into the filter element 7. After the filter element 7 is inserted into the filter housing 1, the maintenance cover 10 is fastened to the filter housing 1 by the handle 11. The maintenance cover 10 and the filter housing 1 are sealed by the sealing ring 12. Then, the maintenance cover 10 and the filter housing 1 are fixed by the cover clamp 8. Fuel then enters the filter housing 1 through the inlet pipe 4 and flows into the filter housing 1 on the other side through the connecting pipe 5 through the cavity on one side of the filter housing 1. Then, the fuel enters the filter element 7 through the middle for filtration. After filtration, the fuel flows out from the gap between the filter housing 1 and the filter element 7 and is discharged through the outlet pipe 6, thus improving the filtration efficiency.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A parallel multi-stage fuel filter, comprising a filter housing (1), characterized in that: The outer wall of the filter cartridge housing (1) is provided with a connecting assembly, and a top cover (3) is fixedly connected to one end of the filter cartridge housing (1). A pipeline assembly is provided inside the top cover (3). The pipeline assembly includes an oil outlet pipe (6), one end of which is fixedly connected to the inside of the top cover (3). A connecting pipe (5) is fixedly connected inside the top cover (3), and an oil inlet pipe (4) is fixedly connected inside the connecting pipe (5). Multiple filter elements (7) are slidably connected inside the filter housing (1). A maintenance cover (10) is provided at the other end of the filter housing (1), and a sealing assembly is provided between the maintenance cover (10) and the filter housing (1).

2. The parallel multi-stage fuel filter according to claim 1, characterized in that: The connecting assembly includes a fixing frame (2), one side of which is fixedly connected to the outer wall of the filter cartridge housing (1), and the filter cartridge housing (1) is symmetrically arranged and fixedly connected to one side of the fixing frame (2).

3. A parallel multi-stage fuel filter according to claim 1, characterized in that: The sealing assembly includes a sealing ring (12), which is fitted inside the maintenance cover (10), and the outer wall of the maintenance cover (10) is in contact with the other end of the filter cartridge housing (1).

4. A parallel multi-stage fuel filter according to claim 1, characterized in that: The filter cartridge housing (1) and the outer wall of the maintenance cover (10) are fitted with a cover clamp (8), and a handle (11) is fixedly connected to the bottom of the maintenance cover (10).

5. A parallel multi-stage fuel filter according to claim 1, characterized in that: One of the filter elements (7) is fixedly connected to a connecting tube (9) at one end, and the connecting tube (9) is slidably connected inside the other filter element (7).

6. A parallel multi-stage fuel filter according to claim 1, characterized in that: The filter element (7) is used to filter fuel.

7. A parallel multi-stage fuel filter according to claim 4, characterized in that: The handle (11) is used to facilitate the separation of the maintenance cover (10) from the filter cartridge housing (1).

8. A parallel multi-stage fuel filter according to claim 4, characterized in that: The cylinder cover clamp (8) is used to fix the filter cylinder housing (1) and the maintenance cover (10).

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