Valve element assembly structure for gas-assisted atomization

Abstract

The invention discloses a valve element assembly structure for gas-assisted atomization. The valve element assembly structure comprises a barrel, the flow guide plug is arranged at the inlet end of the barrel, the flow guide plug is provided with an axially-through liquid phase channel located in the center, and the flow guide plug is further provided with axially-through gas phase channels distributed in the circumferential direction; the valve element shaft is driven by a power mechanism to be axially and movably arranged in the barrel, the inlet end of the valve element shaft wraps the outlet end of the liquid phase channel within the axial stroke range to form an annular channel, a certain axial distance is formed between the inlet end of the valve element shaft and the gas phase channel, and an overflow hole is formed in the position, close to the outlet end, of the valve element shaft. And the outlet end of the valve core shaft and the outlet end of the cylinder body form a valve. The two-stage atomizing nozzle can perform two-stage atomizing spraying on a liquid medium, is particularly suitable for a high-viscosity liquid medium, optimizes the atomizing particle size to be 8-10 microns, and can be popularized and applied to mechanical valves in the fields of combustion machinery, pharmacy, food, chemical engineering, agriculture and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of engine valves, and more specifically, to a valve core assembly structure for gas-assisted atomization. Background Art

[0002] In the field of heavy oil (kerosene, diesel) engines, an injector installed inside the cylinder is required to directly inject high-pressure heavy oil into the engine inside the cylinder. The oil-gas mixture of heavy oil directly affects the performance of the engine. Due to the high viscosity of heavy oil, the nozzle spray atomization is poor, uneven, and the particle size is large, and the atomization effect is not as expected, which causes a series of problems such as engine shaking and high fuel consumption. How to improve the atomization effect of heavy oil and thus improve the performance of the engine is a technical problem that needs to be solved in this application. Summary of the invention

[0003] The present invention provides a valve core assembly structure for gas-assisted atomization, which can perform two-stage atomization injection of liquid medium, is particularly suitable for high-viscosity liquid medium, optimizes the atomization particle size to a level of 8-10 μm, and can be widely used in mechanical valves in the fields of combustion machinery, pharmaceuticals, food, chemical industry, agriculture, etc.

[0004] In order to achieve these purposes and other advantages according to the present invention, a valve core assembly structure for gas-assisted atomization is provided, comprising: Cylinder; A flow guide plug is arranged at the inlet end of the cylinder, the flow guide plug is provided with an axially penetrating liquid phase channel located in the center, and the flow guide plug is also provided with axially penetrating gas phase channels distributed circumferentially, the liquid phase channel is a reduced diameter structure, and the axial length of the liquid phase channel is longer than that of the gas phase channel; A valve core shaft, which is axially movable and arranged inside the cylinder under the drive of a power mechanism, the inlet end of the valve core shaft is an open end, the inlet end of the valve core shaft wraps the outlet end of the liquid phase channel within the axial stroke range to form an annular channel, and forms a certain axial spacing with the gas phase channel, the outlet end of the valve core shaft is a closed end, the valve core shaft is provided with an overflow hole near the outlet end, and the outlet end of the valve core shaft and the outlet end of the cylinder form a valve; Among them, the outlet end of the valve core shaft includes a first sealing section and a first expansion section, and the outlet end of the cylinder is cooperated with a second sealing section and a second expansion section. When the first sealing section and the second sealing section engage with the valve core shaft and move axially until the first sealing section abuts against the second sealing section, the valve is closed. When the valve core shaft moves axially until the first sealing section and the second sealing section form an annular gap, the valve opens, and the first expansion section and the second expansion section form an annular expansion gap.

[0005] Preferably, a radial extension platform is provided at the inlet end of the guide plug to be installed on the inlet end of the cylinder, and an axial boss is protruded at the center of the outlet end of the guide plug, so that the axial length of the liquid phase channel is longer than that of the gas phase channel, and the inlet end of the valve core shaft wraps the axial boss to form an annular channel.

[0006] Preferably, the first sealing section is a spherical surface, the first expansion section is a spherical surface or a conical surface, the second sealing section is a conical surface, and the second expansion section is a spherical surface or a conical surface.

[0007] Preferably, at least one annular guide boss is provided on the outside of the valve core shaft, so that the valve core shaft can be axially movably arranged inside the cylinder.

[0008] Preferably, the lower portion of the valve core shaft is a reduced diameter structure and is provided with the overflow hole.

[0009] Preferably, the liquid phase channel is composed of a plurality of coaxially arranged cylindrical cavities with decreasing inner diameters.

[0010] Preferably, the power mechanism comprises a moving magnet, a static magnet, and a reset spring, wherein the static magnet is fixedly arranged inside the cylinder, the moving magnet is arranged opposite to the static magnet, the moving magnet is coaxially fixedly connected to the inlet end of the valve core shaft, the inlet end of the moving magnet forms a reduced diameter structure to wrap the axial boss, a recess is formed at the bottom of the moving magnet, a radial boss is formed inside the cylinder, and the reset spring is arranged between the recess and the radial boss; When the moving magnet is attracted to the static magnet under the action of the external electromagnetic field, the return spring is compressed, the valve core shaft moves axially until the first sealing section and the second sealing section form an annular gap, and the valve opens. When the moving magnet is separated from the static magnet under the action of the return spring, the valve core shaft moves axially until the first sealing section contacts the second sealing section, and the valve is closed.

[0011] Preferably, the cylinder comprises: A sleeve, the inlet end of which is provided with the guide plug radial extension platform, and the outlet end of which is provided with the static magnet; A valve seat sleeve, whose inlet end extends into the outlet end of the sleeve, the inlet end of the valve seat sleeve forms the radial boss to be installed on the reset spring, a valve seat radial extension platform is arranged in the middle part of the valve seat sleeve to be installed on the static magnet, and the outlet end of the valve seat sleeve forms the second sealing section and the second expansion section.

[0012] The present invention has at least the following beneficial effects: First, the present invention introduces the liquid phase and the gas phase respectively through the guide plug, accelerates the airflow through the premixing chamber formed by the guide plug, the cylinder and the valve core shaft, performs atomization and mixing, and forms a mist-like airflow two-phase fluid. The airflow two-phase fluid is accelerated through the valve formed by the valve core shaft and the cylinder, and performs secondary atomization and mixing to form ultra-fine mist particles. It is particularly suitable for high-viscosity liquid media and can be widely used in mechanical valves in the fields of combustion machinery, pharmaceuticals, food, chemical industry, agriculture, etc.

[0013] Second, the present invention sets a guide plug at the inlet end of the cylinder, sets a valve core shaft inside the cylinder, forms a valve at the outlet end of the cylinder, and respectively introduces the liquid phase and the gas phase through the guide plug. The liquid phase channel shrinks in diameter to achieve liquid storage, which is convenient for sufficient spraying when the gas and liquid are mixed. After the gas phase enters the cylinder, the annular channel is narrowed compared to the inner diameter of the cylinder, which accelerates the gas phase and forms a low-pressure area at the outlet end of the liquid phase channel, sucking out the liquid medium and impacting it at high speed, so that the mixed atomized gas-liquid two-phase fluid enters the valve core shaft, and then flows through the valve. The flow channel expands to further form a high-speed jet, which breaks up the droplets in the jet, and achieves ultra-fine atomized particle size and ultra-homogeneous particle distribution.

[0014] Third, the cylinder has component installation space and liquid and gas flow cavities. A guide plug is provided at the inlet end of the cylinder. The guide plug is composed of a base, a liquid hole in the middle, and circumferentially distributed air holes. The liquid holes form a liquid phase channel, and the air holes form a gas phase channel. The diameter of the liquid holes decreases with the flow direction of the liquid medium, so that the liquid medium forms an accumulation and liquid storage effect. The diameter of the air holes can be a uniform diameter. A premixing chamber is formed by the guide plug, the cylinder and the valve core shaft. The inlet end of the valve core shaft can be set to or installed with a structure that wraps the outlet end of the liquid phase channel. The guide plug and the valve core shaft have a certain axial spacing. At the same time, the valve core shaft also wraps the outlet end of the liquid phase channel of the guide plug to form an annular channel. The airflow flows through the premixing chamber from the air holes, the flow channel area becomes narrower, and the size shrinks, so that the gas flow rate increases sharply, thereby forming a low-pressure area at the liquid outlet area, sucking out the liquid medium in the liquid storage chamber, and atomizing and mixing occurs under the impact of the high-speed airflow, forming The gas-liquid two-phase fluid is in a mist form, and a cavity for the gas-liquid two-phase fluid to flow is formed inside the valve core shaft. The valve core shaft moves axially under the drive of a power mechanism. The power can be driven by an electromagnetic coil or a mechanical structure, and there is no restriction here. The outlet end of the valve core shaft is a closed structure, and an overflow hole is arranged near the outlet end at the lower end of the valve core shaft to facilitate the gas-liquid two-phase fluid to be discharged from the valve through the overflow hole. The shape of the outlet end of the valve core shaft matches the outlet end of the cylinder, that is, the axial movement of the valve core shaft makes the first sealing section move relative to the second sealing section, so as to realize sealing (valve closing) and unsealing (valve opening). The first sealing section and the second sealing section can be connected by meshing to realize the relative movement of the valve core shaft and the cylinder, and the first sealing section and the second sealing section form an annular gap, and the first expansion section and the second expansion section form a larger annular expansion gap, so that the gas-liquid two-phase fluid expands and sprays out, thereby realizing a finer atomization particle size and a more homogeneous particle distribution.

[0015] Fourth, the inlet end of the guide plug is provided with a radial extension platform of the guide plug, which is convenient for the installation of the guide plug and the cylinder. The outlet end of the guide plug is provided with an axial boss, so that the axial length of the liquid phase channel is longer than the gas phase channel, so that the gas flow flows to the annular area between the cylinder and the axial boss, and then the gas flows to the annular channel between the valve core shaft and the axial boss, so that the flow channel area becomes narrower and the gas flow rate increases sharply. The first sealing section cooperates with the second sealing section, the first sealing section is a spherical surface, that is, an arc surface, and the second sealing section is a conical surface, that is, a straight surface, so that when the valve core shaft moves axially relative to the cylinder, a rigid seal of abutment can be achieved. At this time, the valve is closed and axial dislocation can also be achieved. At this time, the valve is opened, the first expansion section is a conical surface, that is, a straight surface, and the second expansion section is a conical surface or a spherical surface, that is, a straight surface or an arc surface. The flow channel formed by the first expansion section and the second expansion section is expanded, and the gas-liquid two-phase fluid flowing through the valve must be expanded and ejected.

[0016] Fifth, the number of guiding bosses is preferably two, and the width is preferably 0.2-1.5mm, which not only satisfies the guiding requirements of the valve core shaft movement, but also effectively reduces the motion friction between the valve core shaft and the valve seat sleeve, improves the response speed of the valve, and avoids the core shaft movement from getting stuck. The liquid hole is composed of an inlet with a larger diameter at the top and an outlet with a smaller diameter at the bottom. The cavity structure with a large upper end and a small lower end forms a liquid storage cavity structure. The liquid medium enters from the inlet. Under the action of the surface tension and viscosity of the liquid, the liquid stops flowing out or flows out slowly at the outlet, achieving a liquid storage effect. By setting a moving magnet, a static magnet and a reset spring, the static magnet and the moving magnet are magnetized under the excitation of an external electromagnetic field, and the magnetized moving magnet and the static magnet attract each other. When the magnetic attraction force overcomes the preload force of the reset spring, the moving magnet moves to be attracted to the static magnet, and the movement of the moving magnet drives the valve core shaft to move, thereby opening the valve, allowing the gas-liquid two-phase fluid to circulate and be ejected as a supersonic jet. When the external electromagnetic field disappears, the static magnet and the moving magnet lose the excitation magnetic field, thereby demagnetization occurs, and the magnetic attraction force between the static magnet and the moving magnet disappears; the moving magnet is separated from the static magnet under the action of the preload force of the reset spring, and the moving magnet drives the valve core shaft to move and reset, closing the valve and cutting off the injection of the medium. The cylinder is designed to be composed of a sleeve and a valve seat sleeve. The sleeve is used to be fixedly connected with the guide plug and the static magnet. The static magnet is arranged at the overlapping height of the sleeve and the valve seat sleeve. A reset spring is arranged between the inlet end of the valve seat sleeve and the moving magnet. The outlet end of the valve seat sleeve is slidably connected with the valve core shaft to form a radial boss inside the cylinder, which is convenient for installing components and forming a valve to realize secondary atomization injection.

[0017] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of valve closing and opening according to a technical solution of the present invention; Figure 2 The flow velocity distribution of the gas-liquid two-phase fluid in the premixing chamber of one technical solution of the present invention; Figure 3 A schematic diagram of the structure of a valve core shaft according to a technical solution of the present invention; Figure 4 The figure is a schematic structural diagram of the outlet end of the valve seat sleeve according to a technical solution of the present invention. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0020] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0021] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial sources unless otherwise specified; in the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, set, or detachably connected, set, or connected and set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in specific circumstances. The orientation or position relationship indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0022] like Figures 1 to 4 As shown, the present invention provides a valve core assembly structure for gas-assisted atomization, comprising: Cylinder; A flow guide plug 7 is arranged at the inlet end of the cylinder, the flow guide plug 7 is provided with an axially through liquid phase channel located in the center, and the flow guide plug 7 is also provided with axially through gas phase channels distributed circumferentially, the liquid phase channel is a reduced diameter structure, and the axial length of the liquid phase channel is longer than that of the gas phase channel; The valve core shaft 1 is axially movable and arranged inside the cylinder body under the drive of the power mechanism. The inlet end of the valve core shaft 1 is an open end. The inlet end of the valve core shaft 1 wraps the outlet end of the liquid phase channel within the axial stroke range to form an annular channel, and forms a certain axial spacing with the gas phase channel. The outlet end of the valve core shaft 1 is a closed end. The valve core shaft 1 is provided with an overflow hole near the outlet end. The outlet end of the valve core shaft 1 and the outlet end of the cylinder body form a valve; Among them, the outlet end of the valve core shaft 1 includes a first sealing section 103 and a first expansion section 104, and the outlet end of the cylinder is cooperated with a second sealing section 201 and a second expansion section 202. The first sealing section 103 and the second sealing section 201 are meshed. When the valve core shaft 1 moves axially until the first sealing section 103 contacts the second sealing section 201, the valve is closed. When the valve core shaft 1 moves axially until the first sealing section 103 and the second sealing section 201 form an annular gap, the valve is opened, and the first expansion section 104 and the second expansion section 202 form an annular expansion gap.

[0023] In the above technical scheme, the present invention respectively introduces the liquid phase and the gas phase through the guide plug 7, accelerates the airflow through the premixing chamber formed by the guide plug 7, the cylinder and the valve core shaft 1, performs atomization mixing once, and forms a mist-like airflow two-phase fluid. The airflow two-phase fluid is accelerated through the valve formed by the valve core shaft 1 and the cylinder, and performs secondary atomization mixing to form ultra-fine mist particles, which is particularly suitable for high-viscosity liquid media, optimizes the atomization particle size to the level of 8-10 μm, and can be widely used in mechanical valves in the fields of combustion machinery, pharmaceuticals, food, chemical industry, agriculture, etc.

[0024] The present invention sets a guide plug 7 at the inlet end of the cylinder, sets a valve core shaft 1 inside the cylinder, forms a valve at the outlet end of the cylinder, and respectively introduces the liquid phase and the gas phase through the guide plug 7. The liquid phase channel shrinkage structure realizes liquid storage, which is convenient for sufficient spraying when the gas and liquid are mixed. After the gas phase enters the cylinder, the annular channel is narrowed compared with the inner diameter of the cylinder, so that the gas phase is accelerated, and a low-pressure area is formed at the outlet end of the liquid phase channel, the liquid medium is sucked out and impacted at high speed, so that the mixed atomized gas-liquid two-phase fluid enters the valve core shaft 1, and then the flow channel expands when flowing through the valve to further form a high-speed jet, which breaks up the droplets in the jet, and realizes ultra-fine atomized particle size and ultra-homogeneous particle distribution.

[0025] The cylinder has a component installation space and a liquid phase and a gas phase flow cavity. The inlet end of the cylinder is provided with a guide plug 7. The guide plug 7 is composed of a base, a liquid hole in the middle, and circumferentially distributed gas holes. The liquid holes form a liquid phase channel, and the gas holes form a gas phase channel. The diameter of the liquid holes decreases with the flow direction of the liquid medium, so that the liquid medium forms an accumulation and liquid storage effect. The diameter of the gas holes can be a uniform diameter. A premixing chamber is formed by the guide plug 7, the cylinder and the valve core shaft 1. The inlet end of the valve core shaft 1 can be set to or installed to wrap the liquid phase passage. The outlet end of the channel has a certain axial spacing between the guide plug 7 and the valve core shaft 1. At the same time, the valve core shaft 1 also wraps the outlet end of the liquid phase channel of the guide plug 7. The inlet end of the valve core shaft 1 is a special-shaped structure, or a card block is installed at the inlet end of the valve core shaft 1. The card block is a special-shaped structure, so that the special-shaped structure wraps the guide plug 7 to form an annular channel. The airflow flows through the premixing chamber from the air hole, the flow channel area becomes narrower, and the size shrinks, so that the gas flow rate increases sharply, thereby forming a low-pressure area at the liquid outlet area, sucking out the liquid medium in the liquid storage chamber, and at the high-speed airflow Atomization and mixing occur under impact to form a mist-like gas-liquid two-phase fluid, and a cavity for the flow of gas-liquid two-phase fluid is formed inside the valve core shaft 1. The valve core shaft 1 moves axially under the drive of a power mechanism. The power can be driven by an electromagnetic coil or a mechanical structure, which is not limited here. The outlet end of the valve core shaft 1 is a closed structure, and an overflow hole is arranged near the outlet end at the lower end of the valve core shaft 1 to facilitate the gas-liquid two-phase fluid to be discharged from the valve through the overflow hole. The shape of the outlet end of the valve core shaft 1 matches the outlet end of the cylinder, that is, the axial movement of the valve core shaft 1 makes The first sealing section 103 moves relative to the second sealing section 201, so as to realize sealing (valve closing) and unsealing (valve opening). The first sealing section 103 and the second sealing section 201 can be connected by meshing to realize the relative movement of the valve core shaft 1 and the cylinder. The first sealing section 103 and the second sealing section 201 form an annular gap, and the first expansion section 104 and the second expansion section 202 form a larger annular expansion gap, so that the gas-liquid two-phase fluid expands and sprays out, thereby realizing a finer atomization particle size and a more uniform particle distribution.

[0026] In another technical solution, a radial extension platform of the guide plug 7 is provided at the inlet end of the guide plug 7 so as to be installed on the inlet end of the cylinder. An axial boss is protruded at the center of the outlet end of the guide plug 7 so as to make the axial length of the liquid phase channel longer than that of the gas phase channel. The inlet end of the valve core shaft 1 wraps the axial boss to form an annular channel. The inlet end of the guide plug 7 is provided with a radial extension platform of the guide plug 7 to facilitate the installation of the guide plug 7 and the cylinder. An axial boss is provided at the outlet end of the guide plug 7 so as to make the axial length of the liquid phase channel longer than that of the gas phase channel, so that the gas flow flows to the annular area between the cylinder and the axial boss, and then the gas flows to the annular channel between the valve core shaft 1 and the axial boss, so as to achieve the narrowing of the flow channel area and the sharp increase of the gas flow rate. The axial boss is preferably a reduced diameter structure.

[0027] In another technical solution, the first sealing section 103 is a spherical surface, the first expansion section 104 is a spherical surface or a conical surface, the second sealing section 201 is a conical surface, and the second expansion section 202 is a spherical surface or a conical surface. The first sealing section 103 cooperates with the second sealing section 201, the first sealing section 103 is a spherical surface, i.e., an arc surface, and the second sealing section 201 is a conical surface, i.e., a straight surface, so that when the valve core shaft 1 moves axially relative to the cylinder body, a rigid seal of abutment can be achieved. At this time, the valve is closed, and axial dislocation can also be achieved. At this time, the valve is opened, the first expansion section 104 is a conical surface, i.e., a straight surface, and the second expansion section 202 is a conical surface or a spherical surface, i.e., a straight surface or an arc surface. The flow channel formed by the first expansion section 104 and the second expansion section 202 is expanded, and the gas-liquid two-phase fluid flowing through the valve must be expanded and ejected.

[0028] In another technical solution, at least one annular guide boss 101 is provided on the outside of the valve core shaft 1, so that the valve core shaft 1 can be axially movable inside the cylinder. The number of guide bosses 101 is preferably two, and the width is preferably 0.2-1.5mm, which not only satisfies the guide requirements of the movement of the valve core shaft 1, but also effectively reduces the movement friction between the valve core shaft 1 and the valve seat sleeve 2, improves the response speed of the valve, and avoids the core shaft movement from being stuck.

[0029] In another technical solution, the lower part of the valve core shaft 1 is a reduced diameter structure and is provided with the overflow hole. The gas-liquid two-phase fluid is formed upstream of the valve through the reduced diameter structure.

[0030] In another technical solution, the liquid phase channel is composed of a plurality of coaxially arranged cylindrical cavities with decreasing inner diameters. The liquid passage hole is composed of an inlet with a larger diameter at the top and an outlet with a smaller diameter at the bottom. The cavity structure with a larger upper end and a smaller lower end forms a liquid storage cavity structure. The liquid medium enters from the inlet. Under the action of the surface tension and viscosity of the liquid, the liquid stops flowing out or flows out slowly at the outlet, achieving a liquid storage effect.

[0031] In another technical solution, the power mechanism includes a moving magnet 5, a static magnet 4, and a reset spring 3. The static magnet 4 is fixedly arranged inside the cylinder. The moving magnet 5 is arranged opposite to the static magnet 4. The moving magnet 5 is coaxially fixedly connected to the inlet end of the valve core shaft 1. The inlet end of the valve core shaft 1 is a uniform diameter structure. The moving magnet 5 is installed at the inlet end of the valve core shaft 1. The installation height of the inlet end of the moving magnet 5 is higher than that of the inlet end of the valve core shaft 1. The inlet end of the moving magnet 5 is a special-shaped structure. Specifically, the inlet end of the moving magnet 5 forms a reduced diameter structure to wrap the axial boss, so that the gas flows to the annular channel between the moving magnet 5 and the axial boss to achieve narrowing of the flow channel area. A recess is formed at the bottom of the moving magnet 5, and a radial boss is formed inside the cylinder. The reset spring 3 is arranged between the recess and the radial boss. When the moving magnet 5 is attracted to the static magnet 4 under the action of the external electromagnetic field, the reset spring 3 is compressed, the valve core shaft 1 moves axially until the first sealing section 103 and the second sealing section 201 form an annular gap, and the valve is opened. When the moving magnet 5 is separated from the static magnet 4 under the action of the reset spring 3, the valve core shaft 1 moves axially until the first sealing section 103 contacts the second sealing section 201, and the valve is closed.

[0032] In the above technical solution, by setting a moving magnet 5, a static magnet 4 and a reset spring 3, under the excitation of an external electromagnetic field, the static magnet 4 and the moving magnet 5 are magnetized, and the magnetized moving magnet 5 and the static magnet 4 attract each other. When the magnetic attraction overcomes the preload force of the reset spring 3, the moving magnet 5 moves to be attracted to the static magnet 4, and the movement of the moving magnet 5 drives the valve core shaft 1 to move, thereby opening the valve, allowing the gas-liquid two-phase fluid to circulate and be ejected as a supersonic jet. When the external electromagnetic field disappears, the static magnet 4 and the moving magnet 5 lose the excitation magnetic field, thereby demagnetization occurs, and the magnetic attraction between the static magnet 4 and the moving magnet 5 disappears; the moving magnet 5 is separated from the static magnet 4 under the action of the preload force of the reset spring 3, and the moving magnet 5 drives the valve core shaft 1 to move and reset, closing the valve and cutting off the injection of the medium.

[0033] In another technical solution, the cylinder comprises: The sleeve 6 has a radial extension platform of the guide plug 7 at its inlet end and the static magnet 4 at its outlet end; The valve seat sleeve 2 has its inlet end extending into the outlet end of the sleeve 6, the inlet end of the valve seat sleeve 2 forms the radial boss to install the reset spring 3, the middle part of the valve seat sleeve 2 is provided with a valve seat radial extension platform to install the static magnet 4, and the outlet end of the valve seat sleeve 2 forms the second sealing section 201 and the second expansion section 202.

[0034] In the above technical scheme, the cylinder is designed as a sleeve 6 and a valve seat sleeve 2, the sleeve 6 is used to be fixedly connected with the guide plug 7 and the static magnet 4, the static magnet 4 is arranged at the overlapping height of the sleeve 6 and the valve seat sleeve 2, the static magnet 4 is arranged on the radial extension platform of the valve seat, and the outside and the inside are respectively fixedly connected with the sleeve 6 and the valve seat sleeve 2, a reset spring 3 is arranged between the inlet end of the valve seat sleeve 2 and the moving magnet 5, and the outlet end of the valve seat sleeve 2 is slidably connected with the valve core shaft 1, so that a radial boss is formed inside the cylinder, which is convenient for installing components and forming a valve, thereby realizing secondary atomization injection.

[0035] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be obvious to those skilled in the art.

[0036] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. The valve core assembly structure of gas-assisted atomization is characterized by: include: Cylinder; A flow guide plug is arranged at the inlet end of the cylinder, the flow guide plug is provided with an axially penetrating liquid phase channel located in the center, and the flow guide plug is also provided with axially penetrating gas phase channels distributed circumferentially, the liquid phase channel is a reduced diameter structure, and the axial length of the liquid phase channel is longer than that of the gas phase channel; A valve core shaft, which is axially movable and arranged inside the cylinder under the drive of a power mechanism, the inlet end of the valve core shaft is an open end, the inlet end of the valve core shaft wraps the outlet end of the liquid phase channel within the axial stroke range to form an annular channel, and forms a certain axial spacing with the gas phase channel, the outlet end of the valve core shaft is a closed end, the valve core shaft is provided with an overflow hole near the outlet end, and the outlet end of the valve core shaft and the outlet end of the cylinder form a valve; Among them, the outlet end of the valve core shaft includes a first sealing section and a first expansion section, and the outlet end of the cylinder is cooperated with a second sealing section and a second expansion section. When the first sealing section and the second sealing section engage with the valve core shaft and move axially until the first sealing section abuts against the second sealing section, the valve is closed. When the valve core shaft moves axially until the first sealing section and the second sealing section form an annular gap, the valve opens, and the first expansion section and the second expansion section form an annular expansion gap.

2. The valve core assembly structure of gas-assisted atomization according to claim 1, characterized in that: A radial extension platform is provided at the inlet end of the guide plug so as to be installed on the inlet end of the cylinder body. An axial boss is protruded at the center of the outlet end of the guide plug so that the axial length of the liquid phase channel is longer than that of the gas phase channel. The inlet end of the valve core shaft wraps around the axial boss to form an annular channel.

3. The valve core assembly structure of gas-assisted atomization according to claim 1, characterized in that: The first sealing section is a spherical surface, the first expansion section is a spherical surface or a conical surface, the second sealing section is a conical surface, and the second expansion section is a spherical surface or a conical surface.

4. The valve core assembly structure of gas-assisted atomization according to claim 1, characterized in that: At least one annular guide boss is arranged outside the valve core shaft, so that the valve core shaft can be axially movable inside the cylinder.

5. The valve core assembly structure of gas-assisted atomization according to claim 4, characterized in that: The lower part of the valve core shaft is a reduced diameter structure and is provided with the overflow hole.

6. The valve core assembly structure of gas-assisted atomization according to claim 1, characterized in that: The liquid phase channel is composed of a plurality of coaxially arranged cylindrical cavities with decreasing inner diameters.

7. The valve core assembly structure for gas-assisted atomization according to claim 2, characterized in that: The power mechanism includes a moving magnet, a static magnet, and a reset spring. The static magnet is fixedly arranged inside the cylinder. The moving magnet is arranged opposite to the static magnet. The moving magnet is coaxially fixedly connected to the inlet end of the valve core shaft. The inlet end of the moving magnet forms a reduced diameter structure to wrap the axial boss. A recess is formed at the bottom of the moving magnet. A radial boss is formed inside the cylinder. The reset spring is arranged between the recess and the radial boss. When the moving magnet is attracted to the static magnet under the action of the external electromagnetic field, the return spring is compressed, the valve core shaft moves axially until the first sealing section and the second sealing section form an annular gap, and the valve opens. When the moving magnet is separated from the static magnet under the action of the return spring, the valve core shaft moves axially until the first sealing section contacts the second sealing section, and the valve is closed.

8. The valve core assembly structure for gas-assisted atomization according to claim 7, characterized in that: The cylinder comprises: A sleeve, the inlet end of which is provided with the guide plug radial extension platform, and the outlet end of which is provided with the static magnet; A valve seat sleeve, whose inlet end extends into the outlet end of the sleeve, the inlet end of the valve seat sleeve forms the radial boss to be installed on the reset spring, a valve seat radial extension platform is arranged in the middle part of the valve seat sleeve to be installed on the static magnet, and the outlet end of the valve seat sleeve forms the second sealing section and the second expansion section.

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