A gas injection valve

Abstract

The present application relates to a kind of gas injection valve.The present application includes shell, is provided with air inlet passage;Exhaust seat is installed in the shell, the exhaust seat includes sealing surface, is provided in the air hole of sealing surface and the exhaust passage static iron core assembly communicated with the air hole, is set in the shell, the static iron core assembly includes static iron core and the coil component surrounded in the outer periphery of static iron core;Moving iron core assembly is set in the shell, the moving iron core assembly is matched with the static iron core assembly and can be moved relative to the shell, the moving iron core assembly includes sealing plug, the sealing plug includes moving iron core and the sealing body installed on the moving iron core, the sealing body can be sealed with the sealing surface contact and close the air hole.The present application improves the anti-vibration durability and reduces manufacturing cost and maintenance difficulty.

Description

Technical Field

[0001] This invention relates to the field of solenoid valve technology, and in particular to a gas injection valve. Background Technology

[0002] Natural gas, as a vehicle fuel, emits significantly fewer pollutants than petroleum-based fuels, and its price is much lower than gasoline and diesel, effectively reducing vehicle operating costs. It can generally save about 50% on fuel costs, significantly reducing operating expenses.

[0003] The gas injection valve is a key component of a gas turbine engine, responsible for controlling the engine's intake air volume. Due to the need for precise control of the intake air volume, this component requires high airtightness. Furthermore, it must ensure a stable gas output from the outlet. Existing nozzle structures are relatively complex, involving a large number of parts, leading to assembly difficulties during system integration, poor sealing performance, low reliability, and insufficient vibration resistance and durability, while also resulting in high manufacturing costs. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problems of poor sealing effect, poor reliability, insufficient vibration resistance and durability, and high manufacturing cost of gas injection valves in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention provides a gas injection valve, comprising:

[0006] The outer casing is equipped with an air intake channel;

[0007] An exhaust seat is installed on the housing. The exhaust seat includes a sealing surface, a vent hole disposed on the sealing surface, and an exhaust channel communicating with the vent hole.

[0008] A stationary iron core assembly is disposed within the housing, the stationary iron core assembly including a stationary iron core and a coil component surrounding the outer periphery of the stationary iron core;

[0009] A moving iron core assembly is disposed inside the housing. The moving iron core assembly cooperates with the stationary iron core assembly and can move relative to the housing. The moving iron core assembly includes a sealing plug. The sealing plug includes a moving iron core and a sealing body installed on the moving iron core. The sealing body can make sealing contact with the sealing surface and close the vent hole.

[0010] When the moving iron core assembly moves to the first position, the sealing body makes sealing contact with the sealing surface to isolate the air intake channel and the exhaust channel; when the moving iron core assembly moves to the second position, the sealing body separates from the sealing surface to connect the air intake channel and the exhaust channel.

[0011] In one embodiment of the present invention, the moving iron core is in the form of a disc, and the sealing body is embedded in the middle of one end face of the moving iron core.

[0012] In one embodiment of the present invention, the end of the moving iron core away from the sealing body is provided with a groove that is annular and arranged around the central axis of the moving iron core.

[0013] In one embodiment of the present invention, a first axial through hole is further included, extending axially through the middle of the moving iron core and the middle of the sealing body. A radial through hole is provided on the side wall of the stationary iron core. When the sealing body is separated from the sealing surface, the air intake channel can communicate with the first axial through hole through the radial through hole.

[0014] In one embodiment of the present invention, a plurality of second axial through holes are distributed on the end face of the moving iron core with its central axis as the center. When the sealing body is separated from the sealing surface, the air intake channel can communicate with the vent through the second axial through holes.

[0015] In one embodiment of the present invention, a stroke ring is fitted around the moving iron core, and the sealing body includes an elastic rubber body.

[0016] In one embodiment of the present invention, the moving iron core assembly includes a spring adjusting rod and a spring installed in the inner hole of the stationary iron core. The two ends of the spring are respectively connected to the spring adjusting rod and the sealing plug, and the spring is used to provide a force to move the sealing plug away from the spring adjusting rod.

[0017] In one embodiment of the present invention, an inner O-ring is provided between the stationary iron core and the coil component, an outer O-ring is provided between the coil component and the outer shell, a spring adjusting rod O-ring is provided between the spring adjusting rod and the inner hole of the stationary iron core, a shell O-ring is provided on the outer shell, an inner O-ring is provided between the exhaust seat and the outer shell, and an outer O-ring is provided on the exhaust seat.

[0018] In one embodiment of the present invention, a plurality of the air intake channels are circumferentially distributed on the side wall of the housing, and the housing is covered with a filter screen that covers the air intake channels.

[0019] In one embodiment of the present invention, the outer shell is threadedly connected to a plug-in plastic seal that abuts against the coil component, and the plug-in plastic seal is fitted with a dust cap covering one end of the stationary iron core.

[0020] The technical solution of the present invention has the following advantages over the prior art:

[0021] This invention discloses a gas injection valve that achieves precise control of gas intake and exhaust through the cooperation of a stationary iron core and a moving iron core assembly. By ensuring a tight fit between the sealing body and the sealing surface, effective isolation and connection between the intake and exhaust channels are guaranteed, ensuring the stability and accuracy of the gas flow rate. This invention reduces the number of parts, simplifies the overall structure design of the injection valve, makes system integration more convenient, and reduces assembly difficulty and time costs. Simultaneously, the reduction in the number of parts also lowers manufacturing costs and maintenance difficulty.

[0022] This invention takes into account vibration resistance and durability. By setting a sink groove to reduce the contact area between the sealing plug and the outer shell, the electromagnetic force is released quickly, reducing the impact of vibration on the system and thus extending its service life. Attached Figure Description

[0023] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0024] Figure 1 This is a cross-sectional view of the gas injection valve of the present invention.

[0025] Figure 2 yes Figure 3 A magnified view of the structure at point Z in the middle.

[0026] Figure 3 This is a structural diagram of the gas flow direction of the gas injection valve of the present invention.

[0027] Figure 4 This is an exploded structural diagram of the gas injection valve of the present invention.

[0028] Figure 5 This is a cross-sectional view of the sealing plug of the present invention.

[0029] Figure 6 This is a side view of the sealing plug of the present invention.

[0030] Figure 7 This is a cross-sectional view of the exhaust seat of the present invention.

[0031] Figure 8 This is a top view of the exhaust seat of the present invention.

[0032] Explanation of reference numerals on the accompanying drawings:

[0033] 100. Static iron core assembly; 200. Moving iron core assembly;

[0034] 1. Coil assembly; 2. Stationary iron core; 2-1. Radial through hole; 3. Housing; 3-1. Air inlet channel; 4. Sealing plug; 4-1. Moving iron core; 4-2. Sealing body; 4-3. Slot; 4-4. First axial through hole; 4-5. Second axial through hole; 5. Stroke ring; 6. Exhaust seat; 6-1. Sealing surface; 6-2. Vent hole; 6-3. Exhaust channel; 7. Spring adjusting rod; 7-1. Boss; 7-2. Grading hole; 8. Spring; 9. Insert encapsulation; 10. Cap; 11. Filter screen; 12. Inner O-ring of coil; 13. Outer O-ring of coil; 14. Spring adjusting rod O-ring; 15. Housing O-ring; 16. Inner O-ring of exhaust seat; 17. Outer O-ring of exhaust seat. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0036] In this invention, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this invention, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0037] In this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number; "above," "below," "within," etc., are understood to include the stated number. In the description of this invention, the terms "first" and "second" are used only to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0038] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention based on the specific content of the technical solution.

[0039] Reference Figure 1 , Figure 7 , Figure 8 As shown, a gas injection valve of the present invention includes:

[0040] The outer casing 3 is provided with an air intake channel 3-1;

[0041] An exhaust seat 6 is installed on the outer casing 3. The exhaust seat 6 includes a sealing surface 6-1, a vent hole 6-2 disposed on the sealing surface 6-1, and an exhaust channel 6-3 communicating with the vent hole 6-2.

[0042] A stationary iron core assembly 100 is disposed inside the outer casing 3. The stationary iron core assembly 100 includes a stationary iron core 2 and a coil component 1 surrounding the outer periphery of the stationary iron core 2.

[0043] A moving iron core assembly 200 is disposed inside the outer casing 3. The moving iron core assembly 200 cooperates with the stationary iron core assembly 100 and can move relative to the outer casing 3. The moving iron core assembly 200 includes a sealing plug 4. The sealing plug 4 includes a moving iron core 4-1 and a sealing body 4-2 installed on the moving iron core 4-1. The sealing body 4-2 can make sealing contact with the sealing surface 6-1 and close the vent hole 6-2.

[0044] When the moving iron core assembly 200 moves to the first position, the sealing body 4-2 and the sealing surface 6-1 are in sealing contact, so that the air intake channel 3-1 and the exhaust channel 6-3 are isolated; when the moving iron core assembly 200 moves to the second position, the sealing body 4-2 and the sealing surface 6-1 are separated, so that the air intake channel 3-1 and the exhaust channel 6-3 are connected.

[0045] In one embodiment, refer to Figure 8 As shown, the vent 6-2 is an arc-shaped waist, and multiple vents 6-2 are distributed around the central axis of the sealing surface 6-1.

[0046] In one embodiment, refer to Figure 5 As shown, the moving iron core 4-1 is in the shape of a disc, and the sealing body 4-2 is embedded in the middle of one end face of the moving iron core 4-1.

[0047] Reference Figure 6 As shown, a cavity for accommodating the sealing plug 4 is formed between the outer shell 3 and the exhaust seat 6. A ring-shaped groove 4-3 is provided at the end of the moving iron core 4-1 away from the sealing body 4-2, oriented around the central axis of the moving iron core 4-1. The groove 4-3 reduces the contact area with the outer shell 3, achieving rapid electromagnetic force release.

[0048] In one embodiment, refer to Figure 3As shown, it also includes a first axial through hole 4-4 extending axially through the middle of the moving iron core 4-1 and the middle of the sealing body 4-2. The side wall of the stationary iron core 2 is provided with a radial through hole 2-1. When the sealing body 4-2 is separated from the sealing surface 6-1, the air intake channel 3-1 can communicate with the first axial through hole 4-4 through the radial through hole 2-1.

[0049] In one embodiment, refer to Figure 6 As shown, multiple second axial through holes 4-5 are distributed on the end face of the moving iron core 4-1 with its central axis as the center. When the sealing body 4-2 is separated from the sealing surface 6-1, the air intake channel 3-1 can communicate with the vent hole 6-2 through the second axial through holes 4-5.

[0050] In one embodiment, refer to Figure 1 As shown, the moving iron core 4-1 is externally fitted with a stroke ring 5, which is disposed in the accommodating cavity and forms a movement stroke with the height difference between it and the sealing plug 4. The sealing body 4-2 includes an elastic rubber body, which can achieve a good sealing fit with the sealing surface 6-1 of the exhaust seat 6.

[0051] In one embodiment, refer to Figure 2 As shown, the moving iron core assembly 200 includes a spring adjusting rod 7 and a spring 8 installed in the inner hole of the stationary iron core 2. Both ends of the spring 8 are connected to the spring adjusting rod 7 and the sealing plug 4, respectively. The spring 8 provides a force to move the sealing plug 4 away from the spring adjusting rod 7. The end of the spring adjusting rod 7 that contacts the spring 8 has a boss 7-1, and the inner hole of the stationary iron core 2 is a stepped hole 7-2, providing a dual positioning function and better reliability.

[0052] It is understandable that the spring adjusting rod 7 can adjust the force of the spring 8; the stationary iron core 2, the outer shell 3, and the sealing plug 4 (moving iron core 4-1) form a closed loop of magnetic circuit.

[0053] In one embodiment, refer to Figure 2 As shown, an inner O-ring 12 is provided between the stationary iron core 2 and the coil component 1, an outer O-ring 13 is provided between the coil component 1 and the outer shell 3, a spring adjusting rod 7 O-ring is provided between the spring adjusting rod 7 and the inner hole of the stationary iron core 2, a shell O-ring 15 is provided on the outer shell 3, an inner O-ring 16 is provided between the exhaust seat 6 and the outer shell 3, and an outer O-ring 17 is provided on the exhaust seat 6.

[0054] The sealing body 4-2 of the gas injection valve is made of elastic rubber, which makes good contact with the sealing surface 6-1 of the exhaust seat 6, ensuring improved airtightness. The design of multiple O-rings further enhances the overall sealing performance, effectively preventing gas leakage and enhancing the reliability of the injection valve.

[0055] In one embodiment, refer to Figure 1 As shown, multiple air intake channels 3-1 are circumferentially distributed on the side wall of the housing 3. The housing 3 is covered with a filter screen 11 that covers the air intake channels 3-1, which can effectively filter impurities in the gas, prevent impurities from entering the valve body, extend the service life of the valve, and ensure the normal operation of the system.

[0056] In one embodiment, refer to Figure 1 As shown, the outer casing 3 is threadedly connected to a plug-in plastic seal 9 that abuts against the coil component 1. The plug-in plastic seal 9 is used to fix the wire frame, etc., and provides an electrical connector. The plug-in plastic seal 9 is fitted with a dust cap 10 covering one end of the stationary iron core 2.

[0057] Working principle:

[0058] When the coil component 1 is not energized, the sealing plug 4 is moved away from the outer casing 3 by the spring force of the spring 8. The elastic rubber body below the sealing plug 4 presses on the sealing surface 6-1 of the exhaust seat 6 to form a seal. At this time, the air passage is closed and no gas is discharged from the bottom of the exhaust seat 6.

[0059] When the coil component 1 is energized, the moving iron core 4-1 in the sealing plug 4 acts as a magnetic conductor. Under the influence of electromagnetic force in the magnetic circuit, it overcomes the force of the spring 8 and rises to contact the outer shell 3. At this time, the elastic rubber body below the sealing plug 4 moves away from the sealing surface 6-1 of the exhaust seat 6. At this time, the gas passage is open, and the gas enters from the side of the gas injection valve, passes through the filter screen 11, the air intake channel 3-1, the stationary iron core 2 / sealing plug 4, and is discharged from the bottom air intake channel 3-1 of the exhaust seat 6.

[0060] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A gas injection valve, characterized in that, include: The outer casing (3) is provided with an air intake channel (3-1); An exhaust seat (6) is installed on the outer casing (3). The exhaust seat (6) includes a sealing surface (6-1), a vent hole (6-2) disposed on the sealing surface (6-1), and an exhaust channel (6-3) communicating with the vent hole (6-2). A stationary iron core assembly (100) is disposed inside the housing (3). The stationary iron core assembly (100) includes a stationary iron core (2) and a coil component (1) surrounding the outer periphery of the stationary iron core (2). A moving iron core assembly (200) is disposed inside the outer shell (3). The moving iron core assembly (200) cooperates with the stationary iron core assembly (100) and can move relative to the outer shell (3). The moving iron core assembly (200) includes a sealing plug (4). The sealing plug (4) includes a moving iron core (4-1) and a sealing body (4-2) installed on the moving iron core (4-1). The sealing body (4-2) can make sealing contact with the sealing surface (6-1) and close the vent hole (6-2). When the moving iron core assembly (200) moves to the first position, the sealing body (4-2) makes sealing contact with the sealing surface (6-1) to isolate the air intake channel (3-1) and the exhaust channel (6-3); when the moving iron core assembly (200) moves to the second position, the sealing body (4-2) separates from the sealing surface (6-1) to connect the air intake channel (3-1) and the exhaust channel (6-3). The moving iron core (4-1) is in the shape of a disc, and the sealing body (4-2) is embedded in the middle of one end face of the moving iron core (4-1); The moving iron core (4-1) is provided with a groove (4-3) that is annular and arranged around the central axis of the moving iron core (4-1) at one end away from the sealing body (4-2). The moving iron core (4-1) has multiple second axial through holes (4-5) distributed around its central axis on its end face. When the sealing body (4-2) is separated from the sealing surface (6-1), the air intake channel (3-1) can communicate with the vent hole (6-2) through the second axial through holes (4-5).

2. A gas injection valve according to claim 1, characterized in that, It also includes a first axial through hole (4-4) extending axially through the middle of the moving iron core (4-1) and the middle of the sealing body (4-2). The side wall of the stationary iron core (2) is provided with a radial through hole (2-1). When the sealing body (4-2) is separated from the sealing surface (6-1), the air intake channel (3-1) can communicate with the first axial through hole (4-4) through the radial through hole (2-1).

3. A gas injection valve according to claim 1, characterized in that, The moving iron core (4-1) is fitted with a stroke ring (5), and the sealing body (4-2) includes an elastic rubber body.

4. A gas injection valve according to claim 1, characterized in that, The moving iron core assembly (200) includes a spring adjusting rod (7) and a spring (8) installed in the inner hole of the stationary iron core (2). The two ends of the spring (8) are connected to the spring adjusting rod (7) and the sealing plug (4) respectively. The spring (8) is used to provide a force to move the sealing plug (4) away from the spring adjusting rod (7).

5. A gas injection valve according to claim 4, characterized in that, An inner O-ring (12) is provided between the stationary iron core (2) and the coil component (1), an outer O-ring (13) is provided between the coil component (1) and the outer shell (3), a spring adjusting rod (7) O-ring is provided between the spring adjusting rod (7) and the inner hole of the stationary iron core (2), a shell O-ring (15) is provided on the outer shell (3), an inner O-ring (16) is provided between the exhaust seat (6) and the outer shell (3), and an outer O-ring (17) is provided on the exhaust seat (6).

6. A gas injection valve according to claim 1, characterized in that, Multiple air intake channels (3-1) are circumferentially distributed on the side wall of the housing (3), and the housing (3) is covered with a filter (11) covering the air intake channels (3-1).

7. A gas injection valve according to claim 1, characterized in that, The outer casing (3) is threadedly connected to a plug-in plastic seal (9) that abuts against the coil component (1), and the plug-in plastic seal (9) is fitted with a dust cap (10) covering one end of the stationary iron core (2).

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