Fuel oil electromagnetic valve

Abstract

The utility model relates to a fuel oil electromagnetic valve, which effectively solves the problems that a conventional large-drift-diameter pilot-operated type electromagnetic valve needs larger volume and weight, so that electromagnetic force needed by the electromagnetic valve is larger, and the like. Comprising a shell, the shell comprises a connecting base, an oil outlet pipe and an oil inlet pipe are arranged on the two sides of the connecting base respectively, a connecting groove is formed in the connecting base, a connecting cylinder is coaxially fixed in the connecting groove, the oil outlet pipe is communicated with the connecting groove, the oil inlet pipe is communicated with the connecting cylinder, and a framework is coaxially fixed to the top of the connecting base. An oil outlet cavity is formed by the framework and the connecting base, a positioning ring is coaxially fixed to the bottom of the framework, and a valve is connected into the positioning ring in a sliding mode; through the arrangement of the outer cover, the connecting plate, the ejector rod, the movable iron core, the limiting part and the like, the coil is in a slender cylindrical shape, the area is larger, the better heat dissipation effect is achieved, meanwhile, the valve is provided with the through holes evenly distributed in the circumference, the moving resistance of the valve is smaller, and the coil is prevented from being overheated.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to a fuel solenoid valve. Background Art

[0002] The fuel solenoid valve is a crucial component in a drone's fuel system, controlling the fuel supply. This valve is opened or closed by electromagnetic force and is typically controlled by an ECU based on sensor data.

[0003] Chinese patent application number CN202021474318.0 discloses a fuel solenoid valve with a one-way function, comprising a fuel solenoid valve body, a one-way valve installed inside the outlet nozzle of the fuel solenoid valve body, and a one-way valve comprising a one-way valve seat, a one-way valve core, and a one-way return spring. The one-way valve seat is installed at the end of the outlet nozzle near the fuel solenoid valve outlet passage, and the one-way valve core is slidably arranged inside the outlet nozzle, contacting the one-way valve seat and cutting off the internal passage of the outlet nozzle. The one-way return spring is located on the side of the one-way valve core away from the one-way valve seat, and its two ends respectively abut the one-way valve core and the inner wall of the outlet nozzle. In the present utility model, the one-way valve provided at the oil outlet ensures that when the pressure at the outlet of the fuel solenoid valve fluctuates, no fuel will flow back from the outlet nozzle into the valve chamber of the fuel solenoid valve, thereby ensuring the stability of the operation of the fuel solenoid valve.

[0004] The existing fuel solenoid valve still has the following problems:

[0005] 1. Conventional large-diameter pilot-operated solenoid valves require larger volume and weight. At this time, the solenoid valve requires greater electromagnetic force. Relatively speaking, the more turns the coil has, the more severe the heat will be.

[0006] 2. When the solenoid valve is closed, the electromagnetic force overcomes the elastic force of the spring and the friction between the valve and the surrounding side. The sealing rubber ring of the valve contacts the seal below to close the solenoid valve. When the electromagnetic force is unstable, the valve and the seal are prone to loose sealing. Utility Model Content

[0007] In view of the above problems, the present invention provides a fuel solenoid valve, which has the advantages of small size, light weight, fast response speed and good sealing performance.

[0008] The technical solution is as follows: the utility model comprises a housing, the housing comprises a connecting seat, an oil outlet pipe and an oil inlet pipe are respectively provided on both sides of the connecting seat, a connecting groove is provided on the connecting seat, a connecting cylinder is coaxially fixed in the connecting groove, the oil outlet pipe is communicated with the connecting groove, the oil inlet pipe is communicated with the connecting cylinder, a frame is coaxially fixed to the top of the connecting seat, the frame and the connecting seat form an oil outlet cavity, a positioning ring is coaxially fixed to the bottom of the frame, a valve is slidably connected in the positioning ring;

[0009] A spring seat is coaxially fixed in the connecting cylinder, and the top of the spring seat is connected to the valve via a spring. The valve is provided with a plurality of through holes evenly distributed around the circumference, an outer cover is coaxially fixed to the top of the frame, a connecting plate is coaxially fixed to the inside of the outer cover, a slide groove is provided in the frame, a push rod is slidably connected in the slide groove, an end of the push rod close to the valve contacts the valve, and a moving iron core is coaxially fixed to an end of the push rod away from the valve, the connecting plate includes a supporting portion, a sliding hole is coaxially provided on the supporting portion, a limiting portion is coaxially fixed to the bottom of the supporting portion, and the moving iron core slides in the limiting portion;

[0010] A connecting ring is coaxially fixed between the connecting plate and the frame. A coil is wound around the connecting plate, the frame and the connecting ring. An electric connector is coaxially fixed on the top of the outer cover. The electric connector is externally connected to a power supply device.

[0011] Preferably, a sealing rubber ring is coaxially fixed to the bottom of the valve, a sealing groove is provided on the inner wall of the positioning ring, and a sealing ring is provided in the sealing groove.

[0012] Preferably, a support seat is coaxially fixed on the spring seat, a placement groove is provided on the inner wall of the valve, and the support seat and the placement groove are connected via a spring.

[0013] Preferably, the top of the connecting cylinder includes a sealing part and a horizontal part, the sealing part is in contact with the sealing rubber ring arranged under the valve, and a plurality of circumferentially evenly distributed extrusion blocks are fixed at the outer edge of the bottom of the valve. The extrusion blocks are located above the horizontal part, and an auxiliary sealing structure is provided between the horizontal part and the sealing part.

[0014] Preferably, the auxiliary sealing structure includes an annular sealing groove running through the horizontal part and the sealing part, the cross section of the annular sealing groove is a "J"-shaped structure, an extrusion ring that slides up and down is provided at one end of the annular sealing groove close to the horizontal part, and an elastic membrane is fixedly connected to one end of the annular sealing groove close to the sealing part, and the elastic membrane, the annular sealing groove and the extrusion ring form a sealed environment.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. Through the arrangement of the outer cover, connecting plate, ejector rod, moving iron core and limit part, the coil is in the shape of an elongated cylinder with a larger area and better heat dissipation effect. At the same time, a plurality of through holes evenly distributed around the circumference are opened on the valve. When the ejector rod drives the valve to move, the pressure of the chamber above the valve is consistent with the pressure of the chamber below the valve, and the resistance to the movement of the valve is smaller. The required electromagnetic force only needs to overcome the elastic force of the spring and the friction between the valve and the annular ring. The electromagnetic force is smaller, thus avoiding overheating of the coil.

[0017] 2. Through the arrangement of the annular sealing groove, extrusion ring, elastic membrane and extrusion blocks, when the ejector rod drives the valve downward, multiple extrusion blocks contact the extrusion ring and drive the extrusion ring to move downward. The elastic membrane is deformed after being squeezed. At this time, the extrusion force between the elastic membrane and the sealing rubber ring is stronger, further improving the sealing performance of the valve and the connecting tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the present utility model.

[0019] Figure 2 It is a cross-sectional view of the present utility model.

[0020] Figure 3 It is a three-dimensional cross-sectional schematic diagram of the skeleton and connecting parts in the utility model.

[0021] Figure 4 It is a three-dimensional cross-sectional schematic diagram of the valve in the utility model.

[0022] Figure 5 It is a three-dimensional cross-sectional schematic diagram of the connecting seat in the utility model.

[0023] Explanation of the numbers in the schematic diagram:

[0024] 1. Shell; 2. Connecting seat; 3. Oil outlet pipe; 4. Oil inlet pipe; 5. Connecting tube; 6. Frame; 7. Positioning ring; 8. Valve; 9. Spring seat; 10. Through hole; 11. Outer cover; 12. Connecting plate; 13. Push rod; 14. Moving iron core; 15. Support part; 16. Limiting part; 17. Connecting ring; 18. Electrical connector; 19. Sealing part; 20. Horizontal part; 21. Extrusion block; 22. Annular sealing groove; 23. Extrusion ring; 24. Elastic membrane. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Depend on Figures 1 to 5It is given, including a shell 1, which includes a connecting seat 2, and an oil outlet pipe 3 and an oil inlet pipe 4 are respectively provided on both sides of the connecting seat 2. The oil outlet pipe 3 and the oil inlet pipe 4 are respectively fixedly connected to the corresponding pipes, and a seal is provided at the connection point. A connecting groove is provided on the connecting seat 2, and a connecting cylinder 5 is coaxially fixed in the connecting groove. The oil outlet pipe 3 is communicated with the connecting groove, and the oil inlet pipe 4 is communicated with the connecting cylinder 5. A skeleton 6 is coaxially fixed to the top of the connecting seat 2, and the skeleton 6 and the connecting seat 2 form an oil outlet cavity. A positioning ring 7 is coaxially fixed to the bottom of the skeleton 6, and a valve 8 is slidably connected to the positioning ring 7. The valve 8 slides up and down in the positioning ring 7. Since the medium flowing in the solenoid valve is oily, the friction between the positioning ring 7 and the valve 8 is small.

[0027] Taking into account the conventional large-diameter pilot-operated solenoid valve, the required volume and weight are larger, and the electromagnetic force required by the solenoid valve is larger. Relatively speaking, the more turns the coil has, the more serious the heat will be. A spring seat 9 is coaxially fixed in the connecting cylinder 5. The top of the spring seat 9 is connected to the valve 8 through a spring. The valve 8 is provided with a plurality of through holes 10 evenly distributed around the circumference. In this embodiment, the through hole 10 is a circular structure. The top of the skeleton 6 is coaxially fixed with an outer cover 11. The outer cover 11 is a slender cylindrical shape. A connecting plate 12 is coaxially fixed inside the outer cover 11. A slide groove is provided in the skeleton 6. A push rod 13 is slidably connected in the slide groove. The push rod 13 is in contact with the valve 8 at one end close to the valve 8, and the push rod 13 is away from the valve 8 at one end. A moving iron core 14 is coaxially fixed to the end, and the connecting plate 12 includes a supporting portion 15. A sliding hole is coaxially provided on the supporting portion 15. A limiting portion 16 is coaxially fixed to the bottom of the supporting portion 15. The moving iron core 14 slides in the limiting portion 16. Through the outer cover 11, the connecting plate 12, the ejector rod 13, the moving iron core 14 and the limiting portion 16, the coil is in the shape of a slender cylinder with a larger area and better heat dissipation effect. At the same time, a plurality of through holes 10 evenly distributed around the circumference are provided on the valve 8. When the ejector rod 13 drives the valve 8 to move, the pressure in the chamber above the valve 8 is consistent with the pressure in the chamber below, and the resistance to the movement of the valve 8 is smaller. The required electromagnetic force only needs to overcome the elastic force of the spring and the friction between the valve 8 and the annular ring. The electromagnetic force is smaller, thereby avoiding overheating of the coil.

[0028] To further supplement the structure of the solenoid valve, a connecting ring 17 is coaxially fixed between the connecting plate 12 and the skeleton 6, and a coil is wound around the connecting plate 12, the skeleton 6 and the connecting ring 17. The coil is in the shape of a slender cylinder, so as to achieve a higher heat dissipation effect. An electrical connector 18 is coaxially fixed to the top of the outer cover 11, and the electrical connector 18 is externally connected to the power supply equipment. It should also be noted that when assembling the solenoid valve, the skeleton 6, the connecting ring 17 and the connecting plate 12 are installed and welded in sequence.

[0029] refer to Figure 2 As shown, in order to ensure the sealing between the valve 8 and the positioning ring 7, a sealing rubber ring is coaxially fixed to the bottom of the valve 8, and a sealing groove is opened on the inner wall of the positioning ring 7, and a sealing ring is arranged in the sealing groove.

[0030] refer to Figure 2 As shown, in order to enhance the matching stability between the spring, the spring seat 9 and the valve 8, a support seat is coaxially fixed on the spring seat 9, a placement groove is opened on the inner wall of the valve 8, and the support seat and the placement groove are connected by a spring.

[0031] refer to Figure 2 and Figure 4 As shown, considering that when the solenoid valve is closed, the electromagnetic force overcomes the elastic force of the spring and the friction between the valve 8 and the surrounding side, the sealing rubber ring of the valve 8 contacts the sealing member below to realize the closure of the solenoid valve. When the electromagnetic force is unstable, there is a problem of poor sealing between the valve 8 and the connecting tube 5. The top of the connecting tube 5 includes a sealing portion 19 and a horizontal portion 20. The sealing portion 19 contacts the sealing rubber ring arranged below the valve 8. A plurality of circumferentially evenly distributed extrusion blocks 21 are fixed to the outer edge of the bottom of the valve 8. The extrusion block 21 is located above the horizontal portion 20. An auxiliary sealing structure is provided between the horizontal portion 20 and the sealing portion 19 to enhance the sealing performance of the valve 8 and the connecting tube 5.

[0032] refer to Figure 2 and Figure 5 As shown, further supplementing the auxiliary sealing structure is that the auxiliary sealing structure includes an annular sealing groove 22 that passes through the horizontal portion 20 and the sealing portion 19. The cross-section of the annular sealing groove 22 is a "J"-shaped structure. An extrusion ring 23 that slides up and down is provided at one end of the annular sealing groove 22 near the horizontal portion 20. An elastic membrane 24 is fixedly connected to one end of the annular sealing groove 22 near the sealing portion 19. The elastic membrane 24, the annular sealing groove 22 and the extrusion ring 23 form a sealed environment. An oily medium is provided in the annular sealing groove 22. In this embodiment, the oily medium is consistent with the medium flowing in the solenoid valve. Through the annular sealing groove 22, the extrusion ring 23, the elastic membrane 24 and the extrusion block 21, when the push rod 13 drives the valve 8 to move downward, multiple extrusion blocks 21 contact the extrusion ring 23 and drive the extrusion ring 23 to move downward. The elastic membrane 24 is deformed after being squeezed. At this time, the extrusion force between the elastic membrane 24 and the sealing rubber ring is stronger, further improving the sealing performance of the valve 8 and the connecting tube 5.

[0033] When using this utility model:

[0034] First, when the coil is de-energized, the solenoid valve is in the open state. At this time, the operating medium enters the oil outlet pipe 3 from the oil inlet pipe 4 through the connecting tube 5 and the oil outlet cavity, and flows out through the oil outlet pipe 3.

[0035] Then, when the coil is energized, the moving iron core 14 moves downward under the influence of the electromagnetic force, and the moving iron core 14 drives the push rod 13 to move downward, and the push rod 13 drives the valve 8 to move downward until the valve 8 is fully in contact with the connecting tube 5 and a seal is formed;

[0036] Finally, when the valve 8 moves downward, the multiple extrusion blocks 21 contact the extrusion ring 23 and drive the extrusion ring 23 to move downward. The elastic membrane 24 is deformed after being squeezed, and the extrusion force between the elastic membrane 24 and the sealing rubber ring is stronger.

[0037] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fuel solenoid valve, comprising a housing (1), characterized in that: The housing (1) includes a connecting seat (2), an oil outlet pipe (3) and an oil inlet pipe (4) are respectively provided on both sides of the connecting seat (2), a connecting groove is provided on the connecting seat (2), a connecting cylinder (5) is coaxially fixed in the connecting groove, the oil outlet pipe (3) is communicated with the connecting groove, and the oil inlet pipe (4) is communicated with the connecting cylinder (5), a frame (6) is coaxially fixed on the top of the connecting seat (2), the frame (6) and the connecting seat (2) form an oil outlet cavity, a positioning ring (7) is coaxially fixed on the bottom of the frame (6), and a valve (8) is slidably connected in the positioning ring (7); A spring seat (9) is coaxially fixed in the connecting cylinder (5), and the top of the spring seat (9) is connected to the valve (8) through a spring. The valve (8) is provided with a plurality of through holes (10) uniformly distributed around the circumference. An outer cover (11) is coaxially fixed to the top of the skeleton (6), and a connecting plate (12) is coaxially fixed inside the outer cover (11). A sliding groove is provided in the skeleton (6), and a push rod (13) is slidably connected in the sliding groove. The end of the push rod (13) close to the valve (8) contacts the valve (8), and the end of the push rod (13) away from the valve (8) is coaxially fixed with a moving iron core (14). The connecting plate (12) includes a supporting portion (15), a sliding hole is coaxially provided on the supporting portion (15), and a limiting portion (16) is coaxially fixed to the bottom of the supporting portion (15), and the moving iron core (14) slides in the limiting portion (16). A connecting ring (17) is coaxially fixed between the connecting plate (12) and the frame (6); a coil is wound around the connecting plate (12), the frame (6) and the connecting ring (17); an electric connector (18) is coaxially fixed to the top of the outer cover (11); and the electric connector (18) is externally connected to a power supply device.

2. The fuel solenoid valve according to claim 1, characterized in that: A sealing rubber ring is coaxially fixed to the bottom of the valve (8), and a sealing groove is provided on the inner wall of the positioning ring (7), wherein a sealing ring is provided in the sealing groove.

3. The fuel solenoid valve according to claim 2, characterized in that: A support seat is coaxially fixed on the spring seat (9), a placement groove is provided on the inner wall of the valve (8), and the support seat and the placement groove are connected via a spring.

4. The fuel solenoid valve according to claim 3, characterized in that: The top of the connecting tube (5) includes a sealing portion (19) and a horizontal portion (20), wherein the sealing portion (19) contacts a sealing rubber ring provided below the valve (8), and a plurality of circumferentially evenly distributed extrusion blocks (21) are fixed to the outer edge of the bottom of the valve (8), wherein the extrusion blocks (21) are located above the horizontal portion (20), and an auxiliary sealing structure is provided between the horizontal portion (20) and the sealing portion (19).

5. The fuel solenoid valve according to claim 4, characterized in that: The auxiliary sealing structure comprises an annular sealing groove (22) penetrating the horizontal portion (20) and the sealing portion (19); the cross section of the annular sealing groove (22) is a "J"-shaped structure; an extrusion ring (23) that slides up and down is provided at one end of the annular sealing groove (22) close to the horizontal portion (20); an elastic membrane (24) is fixedly connected to one end of the annular sealing groove (22) close to the sealing portion (19); the elastic membrane (24), the annular sealing groove (22) and the extrusion ring (23) form a sealed environment; and an oily medium is provided in the annular sealing groove (22).

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