Water heating fuel sensor with detachable water washing filter

Abstract

The utility model belongs to fuel sensor technical field discloses a water heating fuel sensor with detachable water washing filter screen, mainly solves the problem that the existing technology cooling water impurity is easy to jam solenoid valve and leads to the problem of failure. The utility model includes valve seat and coil type one-way solenoid valve, and its key lies at the inside installation of valve seat has the mesh cover with water filter screen, and the one side of mesh cover abuts with self -sealing assembly, and self -sealing assembly slidingly connects in the inside of valve seat, and the mesh cover screw is tight and opens the sealing piece and opens the water route, and the cooling water is filtered after water filter screen and enters solenoid valve, when loosening the mesh cover, spring pushes sealing piece and seals the water route automatically, can wash the filter screen without leakage. The utility model is combined through mechanical self -sealing and washable filter screen, fundamentally prevents solenoid valve jam, significantly reduces maintenance cost and time, improves the reliability of sensor.

Description

Technical Field

[0001] This utility model belongs to the field of fuel sensor technology, specifically, it relates to a water-heated fuel sensor with a detachable washable filter. Background Technology

[0002] When vehicles are used in cold environments, diesel fuel is prone to waxing and freezing. Therefore, adding a heating device to the fuel sensor has become a common technology. An existing water-heated fuel sensor typically includes components such as a coil-type one-way solenoid valve, a liquid level sensing unit, and a fuel line interface. Its working principle is to use the engine's cooling water to heat the diesel fuel in the fuel tank by passing through a heat exchanger controlled by the solenoid valve inside the sensor.

[0003] However, since the engine cooling water passages are cast and the interface locations are machined, improper operation during the welding process is inevitable, potentially leaving weld slag residue inside the cavity. Furthermore, if metal shavings and other debris generated during machining are not thoroughly cleaned, they will gradually enter the cooling water during subsequent use, increasing in quantity. Ultimately, weld slag, rust, and other impurities in the cooling water can easily flow into the coil-type one-way solenoid valve. Because the fit between the valve core and seat of the solenoid valve is extremely precise and narrow, these impurities can easily become stuck in the gap, causing solenoid valve blockage, valve core malfunction, scratches and damage to the sealing surface, ultimately rendering the entire solenoid valve unusable. This not only leads to sensor failure but also requires expensive assembly replacement, resulting in high repair costs and long repair times. Utility Model Content

[0004] To address the aforementioned shortcomings, this invention provides a water-heated fuel sensor with a detachable washable filter.

[0005] To solve the above-mentioned technical problems, the present utility model adopts the following technical solution: a water-heated fuel sensor with a detachable washable filter screen, including a valve seat and a coil-type one-way solenoid valve fixedly connected to the valve seat. The coil-type one-way solenoid valve controls the flow of water in the valve seat. A water filter screen is installed inside the valve seat. A screen cover is snapped onto one side of the water filter screen. The screen cover is detachably connected to the valve seat. A self-sealing component abuts against one side of the screen cover. The self-sealing component is slidably connected inside the valve seat. Cooling water enters the coil-type one-way solenoid valve through the self-sealing component, reducing the blockage of the coil-type one-way solenoid valve by impurities.

[0006] Preferably, the self-sealing assembly includes a sealing element, an elastic element, and a push rod. A limiting hole is formed inside the valve seat, and a water passage hole is formed radially in the limiting hole. One end of the push rod is slidably connected to the limiting hole through the elastic element, and the other end of the push rod is threadedly connected to the sealing element, which is a sealing sheet, and the elastic element is a spring.

[0007] Preferably, the mesh cover is configured such that when it is tightened onto the valve seat, the push rod will push open the sealing plate, creating a gap between the sealing plate and the valve seat, thus opening the water passage and allowing cooling water to pass through the water filter and enter the valve seat of the coil-type one-way solenoid valve, flowing out through the outlet connector; when the mesh cover is loosened, the spring pushes the sealing plate to automatically close, tightly blocking the water passage, thereby enabling leak-free disassembly and cleaning of the filter without draining the cooling water.

[0008] Preferably, a water spiral pipe is connected to the bottom of the valve seat, an inlet connector is connected to the other end of the water spiral pipe, and an outlet connector is connected to the top of the valve seat, forming a water channel from the inlet connector to the outlet connector.

[0009] It also includes a top seat fixed below the valve seat and a cover covering the top seat. The bottom of the top seat is connected to an oil suction pipe, an oil return pipe and an information pipe respectively. The other end of the oil suction pipe and the oil return pipe are connected to an oil suction connector and an oil return connector respectively. The bottom of the information pipe is fixed on a tray. A rubber shock-absorbing pad is fixedly connected to the bottom of the tray. A float is installed on the information pipe to display the liquid level.

[0010] An air connector is also provided above the top seat, which is connected to a pressure balancing valve integrated in the top seat. The pressure balancing valve includes a plastic ball for overpressure release and a steel ball for vacuum compensation. The air connector is connected to the chamber of the pressure balancing valve.

[0011] Preferably, the top seat is fixedly connected to the side opposite the coil-type one-way solenoid valve with a connector, which facilitates installation and connection with other components.

[0012] The technical solution of this utility model has the following beneficial effects:

[0013] 1. Effective anti-clogging: The washable filter screen can filter out more than 95% of impurities larger than 50μm, fundamentally preventing impurities from entering the solenoid valve and solving the core problem of its failure due to jamming.

[0014] 2. Extremely low maintenance cost: When blockage occurs, there is no need to replace the entire sensor or solenoid valve assembly. Simply unscrew the screen cover, remove the filter screen and clean it to restore the function, which greatly saves maintenance time and parts costs.

[0015] 3. Safe and convenient: The self-sealing design eliminates the risk of cooling water leakage during disassembly and maintenance, and the operation is simple and quick. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a front view of the overall structure of this utility model;

[0018] Figure 3 This is a front view of the coil-type one-way solenoid valve and self-sealing assembly of this utility model;

[0019] Figure 4 This is a cross-sectional view along the AA direction of the coil-type one-way solenoid valve and self-sealing assembly of this utility model;

[0020] Figure 5 This is a schematic diagram of the water filter screen of this utility model in the removed state.

[0021] In the diagram: 1. Coil-type one-way solenoid valve; 2. Valve seat; 3. Water filter screen; 4. Screen cover; 51. Seal; 52. Elastic element; 53. Top rod; 6. Water spiral pipe; 7. Inlet connector; 8. Outlet connector; 9. Oil suction connector; 10. Oil return connector; 11. Information pipe; 12. Float; 13. Tray; 14. Rubber shock absorber; 15. Air connector; 16. Plastic ball; 17. Steel ball; 18. Top seat; 19. Top cover; 20. Connector; 21. Oil suction pipe; 22. Oil return pipe. Detailed Implementation

[0022] The technical solutions in the embodiments of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0023] like Figure 1-2 As shown, a water-heated fuel sensor with a detachable washable filter screen includes a valve seat 2 and a coil-type one-way solenoid valve 1 fixedly connected to the valve seat 2. The coil-type one-way solenoid valve 1 controls the flow of water in the valve seat 2. A water filter screen 3 is installed inside the valve seat 2. A screen cover 4 is snapped onto one side of the water filter screen 3. The screen cover 4 is detachably connected to the valve seat 2. A self-sealing component abuts against one side of the screen cover 4. The self-sealing component is slidably connected inside the valve seat 2. Cooling water enters the coil-type one-way solenoid valve 1 through the self-sealing component, reducing the clogging of the coil-type one-way solenoid valve 1 by impurities.

[0024] In this embodiment, the valve seat 2 is usually made of aluminum alloy casting. The valve body of the coil-type one-way solenoid valve 1 is directly fixedly installed (e.g., by thread or press fitting) on ​​the valve seat 2, and its solenoid coil is exposed. The bottom of the valve seat 2 is connected to a water spiral pipe 6, the other end of the water spiral pipe 6 is connected to a water inlet connector 7, and the top of the valve seat 2 is connected to a water outlet connector 8. A water channel is formed from the water inlet connector 7 to the water outlet connector 8.

[0025] Specifically, the inlet of the water inlet channel of the valve seat 2 is machined with internal threads, the mesh cover 4 is a cup-shaped structure, and its exterior is machined with external threads that mate with the valve seat 2 and edges that facilitate the rotation of the wrench. The water filter screen 3 is made of high-precision (e.g., 50μm aperture) sintered stainless steel mesh, and its shape is adapted to the inner cavity of the mesh cover 4 and placed inside the mesh cover 4.

[0026] The top seat 18 is fixedly mounted on top of the valve seat 2 by several screws. A sealing ring is provided between the mating surfaces of the two to ensure a seal. The top seat 18 is usually made of oil-resistant engineering plastic. The cover 19 is fastened onto the top seat 18 and fixed by snaps or screws. The top seat 18 also integrates an oil suction connector 9 and an oil return connector 10, which are fixed to the top seat 18 by metal clamps or threaded connections and communicate with the oil passage inside the top seat 18 for connecting the oil suction pipe 21 and the oil return pipe 22 inside the oil tank. There is also an air connector 15 fixed on the top seat 18, which communicates with the internal air pressure balance valve chamber.

[0027] like Figure 3-4 As shown, the self-sealing assembly includes a sealing element 51, an elastic element 52, and a push rod 53. A limit hole is opened inside the valve seat 2, and a water passage hole is opened radially in the limit hole. One end of the push rod 53 is slidably connected to the limit hole through the elastic element 52, and the other end of the push rod 53 is threadedly connected to the sealing element 51. The sealing element 51 is a sealing plate, and the elastic element 52 is a spring. The sealing plate is made of heat-resistant and aging-resistant rubber or engineering plastic, and its sealing surface is a plane or a conical surface. The spring is a stainless steel compression spring.

[0028] Specifically, normal working conditions are as follows: Figure 4 As shown, when heating is required, screw the mesh cover 4 into the valve seat 2 and tighten it. As the mesh cover 4 is screwed in, the spring compression rod 53 pushes the seal, which opens the water inlet channel. Cooling water flows in from the water inlet connector 7 and first passes through the water filter screen 3. Impurities are intercepted outside the filter screen. The clean cooling water then enters the inner cavity of the valve seat 2 through the open channel and flows to the inlet of the coil-type one-way solenoid valve 1. When the solenoid valve coil is energized, the valve port opens, and the cooling water finally flows out from the water outlet connector 8.

[0029] Specifically, the disassembly and cleaning process is as follows: Figure 5 As shown, when the water filter screen 3 needs cleaning due to blockage by impurities, the screen cover 4 is rotated in the reverse direction. The screen cover 4 drives its push rod 53 to gradually retract, and the pressure on the sealing plate disappears. At this time, the compressed spring begins to rebound, pushing the sealing plate back to press it tightly against the limiting hole and the water passage hole, forming a reliable seal. Before the water filter screen 3 is removed, the water passage is automatically and completely cut off, effectively preventing cooling water leakage. The operator can safely remove the screen cover 4 and the water filter screen 3 together to rinse and clean the water filter screen 3. After completion, it can be reinstalled without draining the cooling system, making maintenance extremely simple.

[0030] Specifically, the top seat 18 also integrates a pressure balancing valve, which has a steel ball 17 and a plastic ball 16 in its chamber. The steel ball 17 acts as a vacuum compensation valve and is relatively heavy. When the oil tank is under negative pressure, it is pushed open by atmospheric pressure to allow air to enter and balance the pressure. The plastic ball 16 acts as an overpressure relief valve and is relatively light. When the oil tank is under positive pressure, it is pushed open by oil and gas to allow excess gas to be discharged. Both of them are connected to the atmosphere through the air connector 15 to maintain the stability of the air pressure inside the oil tank.

[0031] Specifically, the bottom of the top seat 18 is also connected to an information tube 11. The end of the information tube 11 is fixed with a tray 13 and a rubber shock-absorbing pad 14, which are used to install the float 12 and transmit the liquid level signal to the vehicle instrument.

[0032] Specifically, the top seat 18 is fixedly connected to the side opposite the coil-type one-way solenoid valve 1 with a connector 20, which facilitates the installation and connection with other components.

[0033] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water-heated fuel sensor with a detachable washable filter screen, comprising a valve seat (2) and a coil-type one-way solenoid valve (1) fixedly connected to the valve seat (2), characterized in that: A water filter screen (3) is installed inside the valve seat (2). A screen cover (4) is snapped onto one side of the water filter screen (3). The screen cover (4) is detachably connected to the valve seat (2). A self-sealing component is abutted on one side of the screen cover (4). The self-sealing component is slidably connected to the inside of the valve seat (2). Cooling water enters the coil-type one-way solenoid valve (1) through the self-sealing component, reducing the blockage of the coil-type one-way solenoid valve (1) by impurities.

2. A water-heated fuel sensor with a detachable washable filter screen according to claim 1, characterized in that: The self-sealing assembly includes a seal (51), an elastic element (52), and a push rod (53). The valve seat (2) has a limiting hole inside, and the limiting hole has a water passage hole in the radial direction. One end of the push rod (53) is slidably connected to the limiting hole through the elastic element (52), and the other end of the push rod (53) is threadedly connected to the seal (51).

3. A water-heated fuel sensor with a detachable washable filter screen according to claim 1, characterized in that: The bottom of the valve seat (2) is connected to a water spiral pipe (6), the other end of the water spiral pipe (6) is connected to a water inlet connector (7), and the top of the valve seat (2) is connected to a water outlet connector (8). A water channel is formed from the water inlet connector (7) to the water outlet connector (8).

4. A water-heated fuel sensor with a detachable washable filter screen according to claim 1, characterized in that: It also includes a top seat (18) fixed below the valve seat (2) and a cover (19) covering the top seat (18). The bottom of the top seat (18) is also connected to an oil suction pipe (21), an oil return pipe (22) and an information pipe (11). The other end of the oil suction pipe (21) and the oil return pipe (22) are respectively connected to an oil suction connector (9) and an oil return connector (10). The bottom of the information pipe (11) is fixed on a tray (13). The bottom of the tray (13) is fixedly connected to a rubber shock-absorbing pad (14).

5. A water-heated fuel sensor with a detachable washable filter screen according to claim 4, characterized in that: An air connector (15) is also provided above the top seat (18), which is connected to a pressure balancing valve integrated in the top seat (18). The pressure balancing valve includes a plastic ball (16) for overpressure release and a steel ball (17) for vacuum compensation. The air connector (15) is connected to the chamber of the pressure balancing valve.

6. A water-heated fuel sensor with a detachable washable filter screen according to claim 4, characterized in that: The top seat (18) is fixedly connected to the side opposite to the coil-type one-way solenoid valve (1) with a connector (20) for easy installation and connection with other components.

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