Oil sprayer with precise filter screen

Abstract

The utility model relates to the technical field of oil sprayers, and discloses an oil sprayer with a precision filter screen, which comprises an oil sprayer shell, a first connecting block is fixedly connected in the oil sprayer shell, a nozzle is slidably connected to the lower surface of the first connecting block, and a sealing ring, a needle valve and an electromagnetic coil are arranged in the oil sprayer shell. A first fixing block is fixedly connected to the interior of the oil sprayer shell, a connecting pipe is in threaded connection with the interior of the first fixing block, a threaded block is in threaded connection with the interior of the connecting pipe, a first oil inlet pipe is fixedly connected to the outer wall of the threaded block, and a filtering assembly is arranged in the first oil inlet pipe. The filter assembly comprises a filter basket, a filter screen I and a filter screen II. According to the fuel oil filtering device, fuel oil enters the second oil inlet pipe through the oil inlet to be preliminarily filtered and enters the first oil inlet pipe, large-particle impurities are prevented from entering the first oil inlet pipe through the second filter screen, suspended particles and fiber impurities in the fuel oil are intercepted, and the first filter screen intercepts tiny impurities in the fuel oil step by step.

Description

Technical Field

[0001] This utility model relates to the field of fuel injector technology, specifically to a fuel injector with a built-in precision filter that is installed on an engine and adjusts the fuel supply of the high-pressure fuel pump according to the engine ECU control signal, thereby controlling the amount of fuel in the engine. In particular, it relates to a fuel injector with a built-in precision filter. Background Technology

[0002] Currently, based on the analysis of returned parts from the market, approximately 30% of the faulty parts are due to poor internal cleanliness of the fuel injector, causing injector needle sticking and nozzle orifice blockage, resulting in insufficient fuel injection and thus affecting engine power. As a core component of the internal combustion engine's fuel injection system, the fuel injector's atomization effect and reliability directly affect the engine's combustion efficiency, power output, and emissions performance. Traditional fuel injectors have long faced the problem of nozzle blockage by fuel impurities, especially with low-quality fuel or prolonged use, where particulate matter, gum, and other contaminants easily accumulate at the nozzle, leading to poor atomization, fuel injection imbalance, and even engine failure. To improve the durability and adaptability of fuel injectors...

[0003] Current fuel injector filtration designs mostly rely on external fuel filters or simple built-in filters. Typical structures include single-stage filter structures, where a single stainless steel filter is installed at the fuel inlet of the injector, which can only intercept larger particles and is ineffective against small impurities, and fixed filter components, where the filter is integrally formed with the injector housing, making it difficult to disassemble, clean, or replace. After long-term use, the filter holes become clogged, leading to insufficient fuel supply.

[0004] The problem with existing technologies is that incomplete fuel filtration leads to nozzle clogging. Because most current injectors use a single-stage coarse filter, tiny particles in the fuel can easily penetrate the filter and enter the nozzle. With prolonged use, these impurities accumulate at the nozzle orifice, causing partial blockage, distorted fuel spray shape, incomplete combustion, and reduced power output. Therefore, this paper proposes an injector with a built-in precision filter to solve these problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a fuel injector with a built-in precision filter, which can effectively filter engine fuel lines and fuel impurities, preventing impurities from entering the injector and causing valve assembly, needle sticking, nozzle hole blockage and failure, insufficient fuel injection, and affecting engine power. It aims to improve the problem of nozzle blockage caused by incomplete fuel filtration, and the problem of these impurities accumulating at the nozzle orifice and causing partial blockage of the nozzle orifice with prolonged use.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fuel injector with a built-in precision filter, comprising a fuel injector housing, a connecting block fixedly connected inside the fuel injector housing, a nozzle slidably connected to the lower surface of the connecting block, a sealing ring, a needle valve and an electromagnetic coil disposed inside the fuel injector housing, a fixing block fixedly connected inside the fuel injector housing, a connecting pipe threadedly connected inside the fixing block, a threaded block threadedly connected inside the connecting pipe, an oil inlet pipe fixedly connected to the outer wall of the threaded block, and a filter assembly disposed inside the oil inlet pipe;

[0007] The filter assembly includes a filter basket, a first filter screen, and a second filter screen. The outer wall of the filter basket is fixedly connected to the inside of the first oil inlet pipe. The outer wall of the first filter screen is fixedly connected to the inside of the first oil inlet pipe. The outer wall of the second filter screen is fixedly connected to the inside of the first oil inlet pipe. One end of the first oil inlet pipe is fixedly connected to the second oil inlet pipe, and one end of the second oil inlet pipe is fixedly connected to an oil inlet.

[0008] Furthermore, a third connecting block is fixedly connected to the outer wall of the first connecting block, and a third connecting plate is fixedly connected to the outer wall of the third connecting block.

[0009] Furthermore, one end of the connecting plate three is fixedly connected to the outer wall of the connecting block one, and the outer wall of the connecting plate three is slidably connected to the connecting plate one.

[0010] Furthermore, a fixing rod is rotatably connected inside the connecting plate, and the outer wall of the fixing rod is fixedly connected to the inner wall of the connecting plate.

[0011] Furthermore, a spring is fixedly connected to the outer wall of the connecting block, and one end of the spring is fixedly connected to the outer wall of the connecting plate.

[0012] Furthermore, a second connecting plate is fixedly connected to the outer wall of the first connecting plate, and a limit block is fixedly connected to the outer wall of the second connecting plate.

[0013] Furthermore, a second connecting block is slidably connected to the outer wall of the limiting block, and a limiting rod is fixedly connected inside the second connecting block.

[0014] Furthermore, the outer wall of the limiting rod is slidably connected to the inner wall of the limiting block, and the outer wall of the connecting block is fixedly connected to the inside of the nozzle.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, fuel enters the fuel inlet pipe 2 through the fuel inlet port for preliminary filtration, then enters the fuel inlet pipe 1. It passes through the filter screen 2 to prevent large particles of impurities from entering, intercepting suspended particles and fibrous impurities in the fuel. The filter screen 1 intercepts tiny impurities in the fuel step by step to prevent clogging in the nozzle. The filter basket filters again, trapping tiny particles and gum deposits to ensure that the final fuel sprayed is free of particles. By rotating the threaded block, the fuel inlet pipe 1 and fuel inlet pipe 2 can be removed and replaced, preventing clogging caused by difficulty in replacing the fuel inlet pipe 1 and fuel inlet pipe 2, thereby improving the practicality of the device.

[0017] 2. In this utility model, by rotating the nozzle, the limiting rod inside the connecting block two is disengaged from the interior of the limiting block, so that the limiting block can be disengaged from the interior of the connecting block two. Then, by pressing the connecting plate one on the connecting block one, the connecting plate two is rotated at a certain angle around the fixed rod, so that the limiting block slides out of the interior of the connecting block two. The spring is used to drive the connecting plate one to automatically return to its original position, so that the nozzle can be quickly disassembled. Different nozzles can produce different spray shapes such as fan shape, cone shape, atomization, direct spray, etc., which are suitable for specific needs. For example, the fan-shaped nozzle is suitable for large-area uniform coverage, and the atomizing nozzle produces fine droplets, which is suitable for humidification, cooling or fine spraying, thereby improving the practicality of the device. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an injector with a built-in precision filter proposed in this utility model;

[0019] Figure 2 A schematic diagram of the cross-sectional structure of the injector housing of an injector with a built-in precision filter proposed in this utility model.

[0020] Figure 3 This is a schematic diagram of the connecting pipe portion of an injector with a built-in precision filter, as proposed in this utility model.

[0021] Figure 4 A cross-sectional structural diagram of the oil inlet pipe of an injector with a built-in precision filter proposed in this utility model.

[0022] Figure 5 This is a schematic diagram of a portion of the connecting block structure of an injector with a built-in precision filter proposed in this utility model.

[0023] Figure 6 This is a schematic diagram of the two-part structure of the connecting block of an injector with a built-in precision filter proposed in this utility model.

[0024] Legend:

[0025] 1. Injector housing; 2. Fixing block one; 3. Connecting pipe; 4. Oil inlet pipe one; 5. Oil inlet pipe two; 6. Oil inlet; 7. Connecting block one; 8. Nozzle; 9. Threaded block; 10. Filter basket; 11. Filter screen one; 12. Filter screen two; 13. Connecting plate one; 14. Fixing rod; 15. Connecting plate two; 16. Connecting block two; 17. Limiting block; 18. Limiting rod; 19. Connecting block three; 20. Connecting plate three; 21. Spring; 22. Sealing ring; 23. Needle valve; 24. Solenoid coil. Detailed Implementation

[0026] 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.

[0027] Reference Figures 1-4 This utility model provides an embodiment of a fuel injector with a built-in precision filter, comprising an injector housing 1, a connecting block 7 fixedly connected inside the injector housing 1, a nozzle 8 slidably connected to the lower surface of the connecting block 7, a sealing ring 22, a needle valve 23, and an electromagnetic coil 24 disposed inside the injector housing 1. The sealing ring 22 is used to provide a certain degree of sealing to prevent fuel leakage. When the electromagnetic coil 24 is energized, it generates a magnetic field, lifting the needle valve 23 connected to the armature, and fuel is injected from the nozzle 8. A fixed... Block 12, fixing block 12 works with connecting pipe 3 to fix fuel inlet pipe 14 and fuel inlet pipe 25, so as to deliver fuel to the inside of injector housing 1 and spray it out from nozzle 8. The fixing block 12 is threadedly connected to connecting pipe 3, and the connecting pipe 3 is threadedly connected to threaded block 9. Threaded block 9 is used to connect fuel inlet pipe 14 and connecting pipe 3, so that fuel inlet pipe 14 and fuel inlet pipe 25 can be disassembled and replaced, preventing the filter hole from becoming clogged after long-term use and causing insufficient fuel supply. The outer wall of threaded block 9 is fixedly connected to fuel inlet pipe 14, and a filter component is installed inside fuel inlet pipe 14.

[0028] The filter assembly includes a filter basket 10, a filter screen 11, and a filter screen 2 12. The outer wall of the filter basket 10 is fixedly connected to the inside of the fuel inlet pipe 4. The filter basket 10 performs filtration to ensure that the final injected fuel is free of particles. The outer wall of the filter screen 11 is fixedly connected to the inside of the fuel inlet pipe 4. The filter screen 11 will intercept small impurities in the fuel step by step to prevent clogging in the nozzle 8. The outer wall of the filter screen 2 12 is fixedly connected to the inside of the fuel inlet pipe 4. The filter screen 2 12 prevents large particles of impurities from entering. One end of the fuel inlet pipe 4 is fixedly connected to the fuel inlet pipe 2 5. One end of the fuel inlet pipe 2 5 is fixedly connected to the fuel inlet port 6. The outer wall of the connecting block 1 7 is fixedly connected to the connecting block 3 19. The outer wall of the connecting block 3 19 is fixedly connected to the connecting plate 3 20.

[0029] Reference Figure 1 , Figure 5 and Figure 6 One end of connecting plate 3 20 is fixedly connected to the outer wall of connecting block 1 7. Connecting plate 1 13 is slidably connected to the outer wall of connecting plate 3 20. Pressing connecting plate 1 13 and rotating it around the fixed rod 14 at a certain angle causes connecting plate 2 15 to drive the limiting block 17 out of connecting block 2 16. The fixed rod 14 is rotatably connected inside connecting plate 1 13. The outer wall of the fixed rod 14 is fixedly connected to the inner wall of connecting plate 3 20. A spring 21 is fixedly connected to the outer wall of connecting block 3 19. The spring 21 has a certain elastic restoring force, so that... The connecting plate 13 automatically returns to its original position. One end of the spring 21 is fixedly connected to the outer wall of the connecting plate 13. The connecting plate 25 is fixedly connected to the outer wall of the connecting plate 13. The limiting block 17 is fixedly connected to the outer wall of the connecting plate 25. The connecting block 26 is slidably connected to the outer wall of the limiting block 17. The limiting rod 18 is fixedly connected inside the connecting block 26. The limiting rod 18 is used to limit the sliding of the limiting block 17. The outer wall of the limiting rod 18 is slidably connected to the inner wall of the limiting block 17. The outer wall of the connecting block 26 is fixedly connected to the inside of the nozzle 8.

[0030] Working principle: When using an injector with a built-in precision filter to inject fuel into the engine combustion chamber, fuel enters through inlet 6 into inlet pipe 2 5 for initial filtration, then into inlet pipe 1 4. There, it passes through filter screen 2 12 to prevent large particles from entering. Filter screen 1 11 further intercepts tiny impurities in the fuel, preventing clogging at the nozzle 8. Filter basket 10 performs a second filtration to ensure the final injected fuel is free of particles. Inlet pipe 1 4 and inlet pipe 2 5 can be removed and replaced by rotating threaded block 9 to prevent clogging due to difficulty in replacement. Fuel then enters the injector housing 1 through connecting pipe 3 and fixing block 1 2, and is sprayed out through nozzle 8. Rotating nozzle 8 drives... The limiting rod 18 inside the connecting block 2 16 disengages from the inside of the limiting block 17. Then, by pressing the connecting plate 13 on the connecting block 1 7, the connecting plate 15 rotates at a certain angle around the fixing rod 14, causing the limiting block 17 to slide out of the inside of the connecting block 2 16. The connecting plate 20 on the connecting block 3 19 is used to fix the fixing rod 14. The spring 21 is used to make the connecting plate 13 automatically return to its original position, thus enabling quick disassembly of the nozzle 8. Different nozzles 8 can produce different spray shapes, such as fan-shaped, cone-shaped, atomized, and direct spray, which are suitable for specific needs. The electromagnetic coil 24 is energized to generate a magnetic field, and the needle valve 23 connected to the armature is lifted, and fuel is sprayed out from the nozzle 8. The sealing ring 22 has a certain sealing performance.

[0031] 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. An oil sprayer with precision filter screen, comprising an oil sprayer housing (1), characterized in that: The injector housing (1) is fixedly connected to a connecting block (7), and a nozzle (8) is slidably connected to the lower surface of the connecting block (7). The injector housing (1) is provided with a sealing ring (22), a needle valve (23) and an electromagnetic coil (24). The injector housing (1) is fixedly connected to a fixing block (2), and a connecting pipe (3) is threadedly connected inside the fixing block (2). A threaded block (9) is threadedly connected inside the connecting pipe (3). An oil inlet pipe (4) is fixedly connected to the outer wall of the threaded block (9). A filter assembly is provided inside the oil inlet pipe (4). The filter assembly includes a filter basket (10), a first filter screen (11), and a second filter screen (12). The outer wall of the filter basket (10) is fixedly connected to the inside of the first oil inlet pipe (4). The outer wall of the first filter screen (11) is fixedly connected to the inside of the first oil inlet pipe (4). The outer wall of the second filter screen (12) is fixedly connected to the inside of the first oil inlet pipe (4). One end of the first oil inlet pipe (4) is fixedly connected to the second oil inlet pipe (5), and one end of the second oil inlet pipe (5) is fixedly connected to the oil inlet port (6).

2. The fuel injector with a precision filter according to claim 1, characterized in that: Connecting block one (7) is fixedly connected to connecting block three (19) on its outer wall, and connecting plate three (20) is fixedly connected to connecting block three (19) on its outer wall.

3. The fuel injector with a precision filter according to claim 2, characterized in that: One end of the connecting plate three (20) is fixedly connected to the outer wall of the connecting block one (7), and the connecting plate one (13) is slidably connected to the outer wall of the connecting plate three (20).

4. The fuel injector with a precision filter screen according to claim 3, characterized in that: A fixing rod (14) is rotatably connected inside the connecting plate one (13), and the outer wall of the fixing rod (14) is fixedly connected to the inner wall of the connecting plate three (20).

5. The fuel injector with a precision filter according to claim 4, characterized in that: A spring (21) is fixedly connected to the outer wall of the connecting block three (19), and one end of the spring (21) is fixedly connected to the outer wall of the connecting plate one (13).

6. The fuel injector with a precision filter screen according to claim 5, characterized in that: A second connecting plate (15) is fixedly connected to the outer wall of the first connecting plate (13), and a limit block (17) is fixedly connected to the outer wall of the second connecting plate (15).

7. The fuel injector with a precision filter screen according to claim 6, characterized in that: The outer wall of the limiting block (17) is slidably connected to the connecting block two (16), and the connecting block two (16) is fixedly connected to the limiting rod (18).

8. The fuel injector with a precision filter screen according to claim 7, characterized in that: The outer wall of the limiting rod (18) is slidably connected to the inner wall of the limiting block (17), and the outer wall of the connecting block two (16) is fixedly connected to the inside of the nozzle (8).

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