A marine diesel engine fuel filter device

Abstract

The utility model relates to diesel engine fuel filtration technical field, concretely is a marine diesel engine fuel filter device, including upper shell, oil inlet, oil outlet and filter assembly, the upper shell left and right sides top is provided with the oil outlet, the upper shell left and right sides bottom is provided with the oil outlet, the filter assembly includes lower shell, connecting piece and filter core, the lower shell top is connected with the upper shell bottom wall through connecting piece, the upper shell bottom is provided with the support frame, the filter core is inserted with support frame, the output end of oil inlet is arranged between support frame and filter core outer wall, the stepped frame below the upper shell and the upper part of lower shell are inserted and cooperate, the guide cover is set in the lower shell outside through the lower through -hole, the upper slot is accurately docked with the fixed block below the oil inlet, and the guide cover is threadedly connected with the fixed block through the bolt, and the "upper shell - guide cover - lower shell" rigid fixing system is formed.

Description

Technical Field

[0001] This utility model relates to the field of diesel engine fuel filtration technology, specifically a marine diesel engine fuel filtration device. Background Technology

[0002] Marine diesel engines are the core of ship power. Their fuel systems are extremely sensitive to impurities (such as metal scraps, moisture, and asphalt). Impurities can scratch the high-pressure oil pump plunger, wear the injector needle valve, resulting in poor fuel atomization, reduced combustion efficiency, and even serious failures such as cylinder scoring and bearing seizure. Traditional fuel filter devices are difficult to assemble stably, and there are risks of not being able to remove impurities and replace the filter element, making them inconvenient to use. Utility Model Content

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a marine diesel engine fuel filtration device.

[0004] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a marine diesel engine fuel filtration device, comprising an upper shell, an oil inlet, an oil outlet, and a filter assembly. Oil outlets are located on the upper left and right sides, and on the lower left and right sides. The filter assembly comprises a lower shell, a connector, and a filter element. The lower shell is connected to the bottom wall of the upper shell via the connector. A support frame is located on the lower part of the upper shell. The filter element is inserted into the support frame. The output end of the oil inlet is located between the support frame and the outer wall of the filter element. The lower shell covers the support frame and the filter element. A gap is provided between the inner bottom wall of the lower shell and the filter element. A connecting pipe communicating with the oil outlet is provided on the top wall of the middle portion of the filter element.

[0005] To facilitate a stable connection between the upper and lower shells, this utility model is improved by including a flange, a sealing ring, and a stepped frame in the connecting component. A stepped frame is also provided below the upper shell, and the lower shell is inserted into the lower part of the stepped frame. A sealing ring is also fitted onto the lower part of the stepped frame, and a flange is provided on the upper edge of the lower shell.

[0006] Preferably, the lower shell is further provided with a locking member connected to the upper shell. The locking member includes a guide cover, a fixing block and a bolt. A through hole adapted to the outer diameter of the lower shell is provided at the center below the guide cover. A fixing block is also provided below the oil inlet. A slot adapted to the fixing block is provided above the guide cover. A bolt threadedly connected to the fixing block is also provided on the guide cover.

[0007] To facilitate drainage, this utility model is improved by providing a water outlet pipe below the lower shell, and a switch valve is provided on the water outlet pipe.

[0008] Preferably, a filter layer is also provided inside the upper shell, and the connecting pipe is disposed below the filter layer.

[0009] Preferably, the sealing ring is made of vulcanized rubber.

[0010] Preferably, mounting plates are symmetrically arranged on the left and right sides of the back of the upper shell.

[0011] (III) Beneficial Effects Compared with the prior art, the present invention provides a marine diesel engine fuel filtration device, which has the following advantages: The marine diesel engine fuel filter device has a stepped frame on the lower part of the upper shell that is inserted into the upper part of the lower shell. The guide cover is sleeved on the outside of the lower shell through the lower through hole. The upper slot is precisely connected to the fixing block below the oil inlet. The guide cover and the fixing block are then threaded together by bolts to form a rigid fixing system of "upper shell-guide cover-lower shell". Attached Figure Description

[0012] Figure 1 This is a first front view schematic diagram of the structure of this utility model; Figure 2 This is a second main view schematic diagram of the structure of this utility model; Figure 3 This is an exploded view of the structure of this utility model; Figure 4 The structure of this utility model Figure 3 A magnified view of a portion of the image.

[0013] In the diagram: 1. Upper shell; 2. Oil inlet; 3. Oil outlet; 4. Lower shell; 5. Filter element; 6. Support frame; 7. Flange; 8. Sealing ring; 9. Stepped frame; 10. Guide cover; 11. Fixing block; 12. Bolt; 13. Water outlet pipe; 14. Switch valve; 15. Filter layer; 16. Mounting plate. Detailed Implementation

[0014] 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.

[0015] Please see Figures 1-4A marine diesel engine fuel filtration device includes an upper shell 1, an oil inlet 2, an oil outlet 3, and a filter assembly. Oil outlets 3 are located on the upper left and right sides of the upper shell 1, and on the lower left and right sides of the upper shell 1. The filter assembly includes a lower shell 4, a connector, and a filter element 5. The lower shell 4 is connected to the bottom wall of the upper shell 1 via the connector. A support frame 6 is located below the upper shell 1, and the filter element 5 is inserted into the support frame 6. The output end of the oil inlet 2 is located on the support frame. Between the support frame 6 and the outer wall of the filter element 5, the lower shell 4 covers the support frame 6 and the filter element 5. A gap is provided between the inner bottom wall of the lower shell 4 and the filter element 5. A connecting pipe communicating with the oil outlet 3 is provided on the top wall of the middle part of the filter element 5. The connecting parts include a flange 7, a sealing ring 8 and a stepped frame 9. A stepped frame 9 is also provided below the upper shell 1. The lower shell 4 is inserted into the lower part of the stepped frame 9. A sealing ring 8 is also sleeved on the lower part of the stepped frame 9. A flange 7 is provided on the upper edge of the lower shell 4. The stepped frame 9 below the upper shell 1 (integrated with the upper shell 1, made of Q235B material) has a stepped structure that is "wider at the top and narrower at the bottom". The upper part of the lower shell 4 is inserted along the inner wall of the stepped frame 9 until the flange 7 at the upper edge of the lower shell 4 fits against the lower surface of the stepped frame 9, ensuring that the upper shell 1 and the lower shell 4 are coaxial. The vulcanized rubber sealing ring 8 fitted on the lower part of the stepped frame 9 is squeezed when the flange 7 is attached, filling the gap between the stepped frame 9 and the lower shell 4, forming the first line of sealing defense. Vulcanized rubber is oil-resistant (resistant to diesel and heavy oil corrosion) and aging-resistant (service life ≥ 5000 hours). Even in the environment of long-term ship turbulence (amplitude ≤ 5°) or temperature and humidity fluctuation (-20℃-80℃), it can still maintain good sealing (leakage ≤ 0.1L / h) to prevent fuel leakage or air from entering the fuel system. In this embodiment, the lower shell 4 is also provided with a locking member connected to the upper shell 1. The locking member includes a guide cover 10, a fixing block 11 and a bolt 12. The guide cover 10 has a through hole at its lower center that matches the outer diameter of the lower shell 4. The oil inlet 2 is also provided with a fixing block 11 below it. The guide cover 10 has a slot that matches the fixing block 11 above it. The guide cover 10 is also provided with a bolt 12 that is threadedly connected to the fixing block 11. The through hole below the guide cover 10 is fitted onto the outside of the lower shell 4 (the inner diameter of the through hole is adapted to the outer diameter of the lower shell 4), so that the slot above the guide cover 10 is precisely aligned with the fixing block 11 below the oil inlet 2 (the slot and the fixing block 11 are in a "convex-concave fit"), and the bolt 12 hole can be aligned without repeated adjustments. The bolt 12 is passed through the bolt 12 hole of the guide cover 10 and tightened with the threaded hole of the fixing block 11 (torque 5-8 N·m) to form a rigid fixing system of "upper shell 1-fixing block 11-guide cover 10-lower shell 4". The device is fixed to the wall or bracket of the ship's engine room using expansion bolts 12 via the mounting plate 16 on the back side of the upper shell 1.

[0016] After fuel enters through inlet 2 (diameter DN25-DN50, suitable for marine fuel pipelines), it flows directly into the gap between the support frame 6 and the outer wall of the filter element 5 (gap width 10-15mm, ensuring low fuel flow resistance and pressure drop ≤0.05MPa) – the filter element 5 and the support frame 6 are plug-in fit (the outer wall of the filter element 5 and the inner wall of the support frame 6 are in close contact without gaps). Fuel can only enter the interior of the filter element 5 through the filter material (such as the chemical fiber pleated filter element 5), intercepting impurities such as metal debris and large particles of asphalt (particle size ≥5μm) during the process. The impurities are trapped on the outer wall of the filter element 5, preventing them from entering the subsequent high-pressure fuel system. The function of the support frame 6 is to fix the position of the filter element 5 and prevent the filter element 5 from shaking due to the turbulence of the ship. The connecting pipe on the top wall of the middle part of the filter element 5 (integrated with the filter element 5 and made of oil-resistant plastic) is connected to the inside of the upper shell 1 to provide a flow channel for the filtered fuel. The fuel that has been initially filtered by filter element 5 enters the interior of upper shell 1 through connecting pipe and flows through filter layer 15 (such as glass fiber layer) inside upper shell 1. This filter layer 15 further intercepts fine impurities that filter element 5 has not filtered out, such as tiny metal powders and asphalt colloids. Finally, it flows from oil outlet 3 (symmetrically arranged on the left and right sides of upper shell 1 to facilitate uniform fuel output) to the high-pressure fuel pump of diesel engine, ensuring that the fuel cleanliness meets the usage requirements of high-pressure components (such as injector needle valve). Marine fuel is prone to water contamination (due to condensation or replenishment), and impurities settle during filtration, requiring discharge through a directional structure. A water outlet pipe 13 is installed below the lower hull 4, with a switch valve 14 on it. Water in the fuel, being denser than fuel (water density 1g / cm³, fuel density 0.85-0.9g / cm³), separates from the fuel and settles at the bottom of the lower hull 4 (above impurities). This water is periodically discharged through the water outlet pipe 13 and switch valve 14 below the lower hull 4. When the switch valve 14 is opened, water flows out of the water outlet pipe 13 due to gravity until pure fuel flows out, at which point the valve is closed. This prevents fuel emulsification, filter element 5 corrosion, or injector corrosion caused by water, thus solving the problem of traditional devices where impurities and water are difficult to separate.

[0017] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0018] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A marine diesel engine fuel filtration device, comprising an upper housing (1), an oil inlet (2), an oil outlet (3), and a filter assembly, characterized in that, Oil outlets (3) are provided on the upper left and right sides of the upper shell (1), and oil outlets (3) are provided on the lower left and right sides of the upper shell (1). The filter assembly includes a lower shell (4), a connector, and a filter element (5). The lower shell (4) is connected to the bottom wall of the upper shell (1) through the connector. A support frame (6) is provided on the lower part of the upper shell (1). The filter element (5) is inserted into the support frame (6). The output end of the oil inlet (2) is located between the support frame (6) and the outer wall of the filter element (5). The lower shell (4) covers the support frame (6) and the filter element (5). A gap is provided between the inner bottom wall of the lower shell (4) and the filter element (5). A connecting pipe that communicates with the oil outlet (3) is provided on the top wall of the middle part of the filter element (5).

2. The marine diesel engine fuel filtration device according to claim 1, characterized in that, The connector includes a flange (7), a sealing ring (8) and a stepped frame (9). A stepped frame (9) is also provided below the upper shell (1). The lower shell (4) is inserted into the lower part of the stepped frame (9). A sealing ring (8) is also sleeved on the lower part of the stepped frame (9). A flange (7) is provided on the upper edge of the lower shell (4).

3. A marine diesel engine fuel filtration device according to claim 2, characterized in that, The lower shell (4) is also provided with a locking component connected to the upper shell (1). The locking component includes a guide cover (10), a fixing block (11), and a bolt (12). The guide cover (10) has a through hole at the center below that is adapted to the outer diameter of the lower shell (4). The oil inlet (2) is also provided with a fixing block (11). The guide cover (10) has a slot adapted to the fixing block (11) above it. The guide cover (10) is also provided with a bolt (12) threadedly connected to the fixing block (11).

4. A marine diesel engine fuel filtration device according to claim 3, characterized in that, A water outlet pipe (13) is also provided below the lower shell (4), and a switch valve (14) is provided on the water outlet pipe (13).

5. A marine diesel engine fuel filtration device according to claim 4, characterized in that, The upper shell (1) is also provided with a filter layer (15), and the connecting pipe is located below the filter layer (15).

6. A marine diesel engine fuel filtration device according to claim 5, characterized in that, The sealing ring (8) is made of vulcanized rubber.

7. A marine diesel engine fuel filtration device according to claim 6, characterized in that, The upper shell (1) is also symmetrically provided with mounting plates (16) on the left and right sides of the back side.

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