Valve core assembly structure for gas-assisted atomization

Abstract

This invention discloses a valve core assembly structure for gas-assisted atomization, comprising: a cylindrical body; a flow guide plug disposed at the inlet end of the cylindrical body, the flow guide plug having an axially penetrating liquid phase channel located at the center, and the flow guide plug also having circumferentially distributed axially penetrating gas phase channels; and a valve core shaft, which is axially movable inside the cylindrical body under the drive of a power mechanism, the inlet end of the valve core shaft wrapping around the outlet end of the liquid phase channel within its axial stroke range to form a circumferential channel, and forming a certain axial distance with the gas phase channel, the valve core shaft having an overflow hole near its outlet end, and the outlet end of the valve core shaft forming a valve with the outlet end of the cylindrical body. This invention enables two-stage atomization and spraying of liquid media, and is particularly suitable for high-viscosity liquid media, optimizing the atomized particle size to the 8-10μm level, and can be widely applied to mechanical valves in combustion machinery, pharmaceuticals, food, chemicals, agriculture, and other fields.

Description

Technical Field

[0001] This invention relates to the field of engine valve technology. More specifically, this invention relates to a valve core assembly structure for gas-assisted atomization. Background Technology

[0002] In the field of heavy oil (kerosene, diesel) engines, injectors installed inside the cylinders are required to directly inject high-pressure heavy oil into the cylinders. The oil-air mixture of heavy oil directly affects engine performance. Due to the high viscosity of heavy oil, problems such as poor and uneven atomization, and excessively large particle size can occur, resulting in unsatisfactory atomization effects, leading to engine vibration, high fuel consumption, and a series of other issues. How to improve the atomization effect of heavy oil and thus improve engine performance is a technical problem that this application urgently needs to solve. Summary of the Invention

[0003] This invention provides a gas-assisted atomizing valve core assembly structure that can perform two-stage atomization spraying of liquid media, which is particularly suitable for high-viscosity liquid media and optimizes the atomization particle size to the level of 8-10 μm. It can be widely used in mechanical valves in fields such as combustion machinery, pharmaceuticals, food, chemicals, and agriculture.

[0004] To achieve these objectives and other advantages according to the present invention, a valve core assembly structure for gas-assisted atomization is provided, comprising:

[0005] cylindrical body;

[0006] A flow guide plug is provided at the inlet end of the cylinder. The flow guide plug has an axially penetrating liquid phase channel located at the center. The flow guide plug also has circumferentially distributed axially penetrating gas phase channels. The liquid phase channel has a narrowed diameter structure, and the axial length of the liquid phase channel is longer than that of the gas phase channel.

[0007] A valve spindle, driven by a power mechanism, is axially movable inside the cylinder. The inlet end of the valve spindle is an open end. The inlet end of the valve spindle surrounds the outlet end of the liquid phase channel and forms a circumferential channel within its axial stroke range, and forms a certain axial distance with the gas phase channel. The outlet end of the valve spindle is a closed end. An overflow hole is provided near the outlet end of the valve spindle. The outlet end of the valve spindle and the outlet end of the cylinder form a valve.

[0008] The valve spindle outlet end includes a first sealing section and a first expansion section, and the cylinder outlet end is provided with a second sealing section and a second expansion section. When the first sealing section and the second sealing section engage with the valve spindle and move axially until the first sealing section abuts against the second sealing section, the valve is closed. When the valve spindle moves axially until the first sealing section and the second sealing section form a circumferential gap, the valve is opened, and the first expansion section and the second expansion section form a circumferential expansion gap.

[0009] Preferably, the inlet end of the flow guide plug is provided with a radial extension platform for installation on the inlet end of the cylinder, and an axial boss is formed at the center of the outlet end of the flow 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 around the axial boss to form a circumferential channel.

[0010] Preferably, the first sealing section is spherical, the first expansion section is spherical or conical, the second sealing section is conical, and the second expansion section is spherical or conical.

[0011] Preferably, the valve spindle has at least one annular guide boss on its outer surface, allowing the valve spindle to be axially movable inside the cylinder.

[0012] Preferably, the lower part of the valve spindle has a reduced diameter structure and is provided with the overflow hole.

[0013] Preferably, the liquid phase channel is composed of multiple cylindrical cavities with decreasing inner diameters arranged coaxially.

[0014] Preferably, the power mechanism includes a moving magnet, a stationary magnet, and a return spring. The stationary magnet is fixedly disposed inside the cylinder. The moving magnet is disposed opposite to the stationary 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 enclose the axial boss. A recess is formed at the bottom of the moving magnet. A radial boss is formed inside the cylinder. The return spring is disposed between the recess and the radial boss.

[0015] When the moving magnet is attracted to the stationary magnet under the action of an external electromagnetic field, the return spring is compressed, and the valve core shaft moves axially to form a circumferential gap between the first sealing section and the second sealing section, thus opening the valve. When the moving magnet separates from the stationary magnet under the action of the return spring, the valve core shaft moves axially to the point where the first sealing section abuts against the second sealing section, thus closing the valve.

[0016] Preferably, the cylindrical body comprises:

[0017] The sleeve has a radial extension platform for the flow guide plug at its inlet end and a static magnet installed at its outlet end.

[0018] A valve seat sleeve has its inlet end extending into the outlet end of the sleeve. The inlet end of the valve seat sleeve forms the radial boss for mounting the return spring. A valve seat radial extension platform is provided in the middle of the valve seat sleeve for mounting the stationary magnet. The outlet end of the valve seat sleeve forms the second sealing section and the second expansion section.

[0019] The present invention has at least the following beneficial effects:

[0020] First, this invention introduces liquid and gas phases through a guide plug, accelerates the airflow through a premixing chamber formed by the guide plug, the cylinder, and the valve core shaft, and performs a primary atomization mixing to form a mist-like two-phase fluid. The two-phase fluid is then accelerated through a valve formed by the valve core shaft and the cylinder, and a secondary atomization mixing is performed to form ultra-fine mist particles. This invention is particularly suitable for high-viscosity liquid media and can be widely applied to mechanical valves in fields such as combustion machinery, pharmaceuticals, food, chemicals, and agriculture.

[0021] Secondly, this invention features a flow guide plug at the inlet end of the cylinder, a valve core shaft inside the cylinder, and a valve at the outlet end of the cylinder. Liquid and gas phases are introduced through the flow guide plug, and the narrowed diameter structure of the liquid phase channel enables liquid storage, facilitating full spraying during gas-liquid mixing. After the gas phase enters the cylinder, the narrowing of the circumferential channel relative to the inner diameter of the cylinder accelerates the gas phase and creates a low-pressure zone at the outlet end of the liquid phase channel, drawing out the liquid medium and impacting it at high speed. This causes the mixed atomized gas-liquid two-phase fluid to enter the valve core shaft and then flow through the valve, where the flow channel expands to form a high-speed jet, breaking up the droplets in the jet and achieving ultra-fine atomized particle size and ultra-homogeneous particle distribution.

[0022] Third, the cylinder has space for component installation and cavities for liquid and gas flow. A flow guide plug is installed at the inlet end of the cylinder. The flow guide plug consists of a base, a central liquid passage hole, and circumferentially distributed gas passage holes. The liquid passage holes form a liquid phase channel, and the gas passage holes form a gas phase channel. The diameter of the liquid passage holes decreases with the direction of liquid medium flow, causing the liquid medium to accumulate and store. The diameter of the gas passage holes can be uniform. A premixing cavity is formed through the flow guide plug, the cylinder, and the valve core shaft. The inlet end of the valve core shaft can be configured as, or installed with, a structure that wraps around the outlet end of the liquid phase channel. The flow guide plug and the valve core shaft have a certain axial distance. Simultaneously, the valve core shaft also wraps around the outlet end of the liquid phase channel of the flow guide plug, forming a circumferential channel. The airflow flows through the gas passage holes into the premixing cavity, where the flow channel narrows and shrinks, resulting in a dramatic increase in gas velocity. This creates a low-pressure zone at the liquid outlet area, drawing out the liquid medium from the storage cavity. Under the impact of the high-speed airflow, the liquid medium undergoes atomization and mixing, forming... The atomized gas-liquid two-phase fluid has a cavity inside the valve core shaft for its flow. The valve core shaft moves axially under the drive of a power mechanism, which can be driven by an electromagnetic coil or a mechanical structure, without limitation. The outlet end of the valve core shaft is a closed structure, and an overflow hole is provided at the lower end of the valve core shaft near the outlet end to facilitate the discharge of the gas-liquid two-phase fluid 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 causes the first sealing section to move relative to the second sealing section, which can 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. The first sealing section and the second sealing section form a circumferential gap, and the first expansion section and the second expansion section form a larger circumferential expansion gap, which causes the gas-liquid two-phase fluid to expand and spray out, thereby achieving a finer atomized particle size and a more uniform particle distribution.

[0023] Fourth, the inlet end of the guide plug is equipped with a radial extension platform to facilitate the installation of the guide plug and the cylinder. The outlet end of the guide plug is equipped with an axial boss, making the axial length of the liquid phase channel longer than that of the gas phase channel. This allows the gas flow to the circumferential area between the cylinder and the axial boss, and then the gas flow to the circumferential channel between the valve core and the axial boss, thus narrowing the flow channel area and greatly increasing the gas velocity. The first sealing section and the second sealing section cooperate. The first sealing section is spherical (arc surface), and the second sealing section is conical (straight surface). This allows the valve core to achieve a rigid seal when it moves axially relative to the cylinder. At this time, the valve is closed, and it can also achieve axial misalignment. When the valve is open, the first expansion section is conical (straight surface), and the second expansion section is conical or spherical (straight or arc surface). The flow channel formed by the first and second expansion sections expands, and the gas-liquid two-phase fluid flowing through the valve will inevitably expand and be ejected.

[0024] Fifth, the number of guiding bosses is preferably two, and their width is preferably 0.2-1.5mm. This not only satisfies the guiding requirements of the valve spindle movement but also effectively reduces the frictional force between the valve spindle and the valve seat, improving the valve's response speed and preventing spindle movement from jamming. The liquid passage consists of an inlet with a larger diameter at the top and an outlet with a smaller diameter at the bottom. The hollow structure with a larger upper end and a smaller lower end forms a liquid storage chamber. The liquid medium enters through the inlet, and under the action of liquid surface tension and viscosity, the liquid stops flowing out or flows out slowly at the outlet, achieving the liquid storage effect. By setting up a moving magnet, a stationary magnet, and a return spring, the stationary and moving magnets are magnetized under the excitation of an external electromagnetic field. The magnetized moving and stationary magnets attract each other. When the magnetic attraction overcomes the preload force of the return spring, the moving magnet moves to engage with the stationary magnet. The movement of the moving magnet drives the valve core shaft to move, thereby opening the valve and allowing the gas-liquid two-phase fluid to flow and be ejected as a supersonic jet. When the external electromagnetic field disappears, the stationary and moving magnets lose their excitation magnetic field, thus demagnetizing. The magnetic attraction between the stationary and moving magnets disappears. Under the action of the preload force of the return spring, the moving magnet separates from the stationary magnet. 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 as a sleeve and a valve seat sleeve. The sleeve is used to fix the flow guide plug and the static magnet. The static magnet is set at the height of the overlap between the sleeve and the valve seat sleeve. A return spring is set between the inlet end of the valve seat sleeve and the moving magnet. The outlet end of the valve seat sleeve is slidably connected to the valve core shaft, so as to form a radial boss inside the cylinder, which facilitates the installation of components and also facilitates the formation of a valve to achieve secondary atomization spray.

[0025] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the valve closing and opening structure according to one technical solution of the present invention;

[0027] Figure 2 The flow velocity distribution of the gas-liquid two-phase fluid in the premixing chamber is a technical solution of the present invention.

[0028] Figure 3 This is a schematic diagram of the valve spindle structure according to one technical solution of the present invention;

[0029] Figure 4 This is a schematic diagram of the outlet end of a valve seat sleeve according to one technical solution of the present invention. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0031] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0032] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are conventional methods, and the reagents and materials mentioned are commercially available. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0033] like Figures 1-4 As shown, the present invention provides a valve core assembly structure for gas-assisted atomization, comprising:

[0034] cylindrical body;

[0035] A flow guide plug 7 is disposed at the inlet end of the cylinder. The flow guide plug 7 is provided with an axially penetrating liquid phase channel located at the center. The flow guide plug 7 is also provided with circumferentially distributed axially penetrating gas phase channels. The liquid phase channel has a narrowed diameter structure, and the axial length of the liquid phase channel is longer than that of the gas phase channel.

[0036] A valve spindle 1 is axially movable inside the cylinder under the drive of a power mechanism. The inlet end of the valve spindle 1 is an open end. The inlet end of the valve spindle 1 surrounds the outlet end of the liquid phase channel and forms a circumferential channel within its axial stroke range, and forms a certain axial distance with the gas phase channel. The outlet end of the valve spindle 1 is a closed end. An overflow hole is provided near the outlet end of the valve spindle 1. The outlet end of the valve spindle 1 and the outlet end of the cylinder form a valve.

[0037] The outlet end of the valve spindle 1 includes a first sealing section 103 and a first expansion section 104. The outlet end of the cylinder is provided with a second sealing section 201 and a second expansion section 202. The first sealing section 103 and the second sealing section 201 are engaged. When the valve spindle 1 moves axially to the point where the first sealing section 103 abuts against the second sealing section 201, the valve is closed. When the valve spindle 1 moves axially to the point where the first sealing section 103 and the second sealing section 201 form a circumferential gap, the valve is opened, and the first expansion section 104 and the second expansion section 202 form a circumferential expansion gap.

[0038] In the above technical solution, the present invention introduces liquid and gas phases through the guide plug 7, and accelerates the airflow through the premixing chamber formed by the guide plug 7, the cylinder and the valve core 1 to perform primary atomization mixing, forming a mist-like two-phase fluid. The two-phase fluid is accelerated through the valve formed by the valve core 1 and the cylinder to perform secondary atomization mixing, forming ultra-fine mist particles. It is particularly suitable for high-viscosity liquid media, and optimizes the atomization particle size to the level of 8-10 μm. It can be widely used in mechanical valves in combustion machinery, pharmaceuticals, food, chemicals, agriculture and other fields.

[0039] This invention features a flow guide plug 7 at the inlet end of the cylinder, a valve core shaft 1 inside the cylinder, and a valve at the outlet end of the cylinder. Liquid and gas phases are introduced through the flow guide plug 7. The narrowed diameter structure of the liquid phase channel enables liquid storage, facilitating full spraying during gas-liquid mixing. After the gas phase enters the cylinder, the narrowing of the circumferential channel relative to the inner diameter of the cylinder accelerates the gas phase and creates a low-pressure zone at the outlet end of the liquid phase channel. This draws out the liquid medium and impacts it at high speed, causing the mixed atomized gas-liquid two-phase fluid to enter the valve core shaft 1. As it flows through the valve, the flow channel expands to form a high-speed jet, breaking up the droplets in the jet and achieving ultra-fine atomized particle size and ultra-homogeneous particle distribution.

[0040] The cylinder has space for component installation and cavities for liquid and gas flow. A flow guide plug 7 is installed at the inlet end of the cylinder. The flow guide plug 7 consists of a base, a central liquid passage hole, and circumferentially distributed gas passage holes. The liquid passage holes form liquid phase channels, and the gas passage holes form gas phase channels. The diameter of the liquid passage holes decreases with the direction of liquid medium flow, causing the liquid medium to accumulate and store. The diameter of the gas passage holes can be uniform. A premixing cavity is formed through the flow guide plug 7, the cylinder, and the valve spindle 1. The inlet end of the valve spindle 1 can be configured as or fitted with a liquid phase passage. The structure at the outlet end of the channel features a flow guide plug 7 with a certain axial distance from the valve core shaft 1. The valve core shaft 1 also wraps around the outlet end of the liquid phase channel of the flow guide plug 7. The inlet end of the valve core shaft 1 has an irregular shape, or a retaining block is installed at the inlet end of the valve core shaft 1. This irregular shape wraps around the flow guide plug 7 to form a circumferential channel. The airflow passes through the gas passage and into the premixing chamber, narrowing the flow channel area and reducing its size, resulting in a significant increase in gas velocity. This creates a low-pressure zone at the liquid outlet area, drawing out the liquid medium from the storage chamber and causing it to be transported by the high-speed airflow. Upon impact, atomization and mixing occur, forming a mist-like gas-liquid two-phase fluid. A cavity for the flow of this two-phase fluid is formed inside the valve core 1. The valve core 1 moves axially under the drive of a power mechanism, which can be either an electromagnetic coil or a mechanical structure; this is not limited. The outlet end of the valve core 1 is a closed structure. An overflow hole is provided at the lower end of the valve core 1 near the outlet end, facilitating the discharge of the gas-liquid two-phase fluid from the valve through the overflow hole. The shape of the outlet end of the valve core 1 matches the outlet end of the cylinder; that is, the axial movement of the valve core 1 causes… The first sealing section 103 moves relative to the second sealing section 201, which can achieve sealing (valve closing) and unsealing (valve opening). The first sealing section 103 and the second sealing section 201 can be connected by meshing to achieve relative movement between the valve core shaft 1 and the cylinder. The first sealing section 103 and the second sealing section 201 form an circumferential gap, and the first expansion section 104 and the second expansion section 202 form a larger circumferential expansion gap, so that the gas-liquid two-phase fluid expands and is ejected, thereby achieving a finer atomized particle size and a more uniform particle distribution.

[0041] In another technical solution, the inlet end of the guide plug 7 is provided with a radial extension platform for installation at the inlet end of the cylinder. An axial boss protrudes from the center of the outlet end of the guide plug 7, making the axial length of the liquid phase channel longer than the gas phase channel. The inlet end of the valve core 1 wraps around the axial boss to form an circumferential channel. The radial extension platform at the inlet end of the guide plug 7 facilitates installation of the guide plug 7 and the cylinder. The axial boss at the outlet end of the guide plug 7 ensures that the axial length of the liquid phase channel is longer than the gas phase channel, allowing the gas flow to the circumferential region of the cylinder and the axial boss. This, in turn, allows the gas to flow into the circumferential channel of the valve core 1 and the axial boss, resulting in a narrowing of the flow channel area and a significant increase in gas velocity. Preferably, the axial boss has a reduced outer diameter.

[0042] In another technical solution, the first sealing section 103 is spherical, the first expansion section 104 is spherical or conical, the second sealing section 201 is conical, and the second expansion section 202 is spherical or conical. The first sealing section 103 and the second sealing section 201 cooperate, with the first sealing section 103 being spherical (i.e., arc-shaped) and the second sealing section 201 being conical (i.e., straight). This allows the valve core shaft 1 to achieve a rigid seal when it moves axially relative to the cylinder, thus closing the valve. It can also achieve axial misalignment, thus opening the valve. The first expansion section 104 is conical (i.e., straight), and the second expansion section 202 is conical or spherical (i.e., straight or arc-shaped). The flow channel formed by the first expansion section 104 and the second expansion section 202 expands, and the gas-liquid two-phase fluid flowing through the valve will inevitably expand and be ejected.

[0043] In another technical solution, at least one annular guide boss 101 is provided on the outside of the valve spindle 1, allowing the valve spindle 1 to be axially movable inside the cylinder. Preferably, there are two guide bosses 101, with a width of 0.2-1.5 mm. This not only satisfies the guiding requirements of the valve spindle 1's movement but also effectively reduces the frictional force between the valve spindle 1 and the valve seat sleeve 2, improving the valve's response speed and preventing the spindle from jamming.

[0044] In another technical solution, the lower part of the valve core shaft 1 has a reduced diameter structure and is provided with the overflow hole. The reduced diameter structure allows the gas-liquid two-phase fluid to be formed upstream of the valve.

[0045] In another technical solution, the liquid phase channel is composed of multiple coaxially arranged cylindrical cavities with decreasing inner diameters. The liquid passage consists 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 through the inlet, and under the action of liquid surface tension and viscosity, the liquid stops flowing out or flows out slowly at the outlet, achieving the liquid storage effect.

[0046] In another technical solution, the power mechanism includes a moving magnet 5, a stationary magnet 4, and a return spring 3. The stationary magnet 4 is fixedly disposed inside the cylinder. The moving magnet 5 is disposed opposite to the stationary magnet 4. The moving magnet 5 is coaxially fixedly connected to the inlet end of the valve spindle 1. The inlet end of the valve spindle 1 has a uniform diameter structure. The moving magnet 5 is installed at the inlet end of the valve spindle 1. The installation height of the inlet end of the moving magnet 5 is higher than that of the inlet end of the valve spindle 1. The inlet end of the moving magnet 5 has an irregular shape structure. Specifically, the inlet end of the moving magnet 5 forms a narrowing structure to wrap the axial boss, so that the gas flows to the circumferential channel between the moving magnet 5 and the axial boss, thereby narrowing the flow channel area. A concave part is formed at the bottom of the moving magnet 5. A radial boss is formed inside the cylinder. The return spring 3 is disposed between the concave part and the radial boss.

[0047] When the moving magnet 5 is attracted to the stationary magnet 4 under the action of an external electromagnetic field, the return spring 3 is compressed, and the valve core 1 moves axially to form a circumferential gap between the first sealing section 103 and the second sealing section 201, and the valve opens. When the moving magnet 5 is separated from the stationary magnet 4 under the action of the return spring 3, the valve core 1 moves axially to the first sealing section 103 abutting against the second sealing section 201, and the valve closes.

[0048] In the above technical solution, by setting a moving magnet 5, a stationary magnet 4, and a return spring 3, the stationary magnet 4 and the moving magnet 5 are magnetized under the excitation of an external electromagnetic field. The magnetized moving magnet 5 and the stationary magnet 4 attract each other. When the magnetic attraction force overcomes the preload force of the return spring 3, the moving magnet 5 moves to engage with the stationary magnet 4. The movement of the moving magnet 5 drives the valve core shaft 1 to move, thereby opening the valve and allowing the gas-liquid two-phase fluid to flow and be ejected as a supersonic jet. When the external electromagnetic field disappears, the stationary magnet 4 and the moving magnet 5 lose the excitation magnetic field, thereby demagnetizing and the magnetic attraction force between the stationary magnet 4 and the moving magnet 5 disappears. Under the action of the preload force of the return spring 3, the moving magnet 5 separates from the stationary magnet 4, 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.

[0049] In another technical solution, the cylinder includes:

[0050] The sleeve 6 has a radial extension platform of the flow guide plug 7 at its inlet end and the static magnet 4 installed at its outlet end.

[0051] 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 return spring 3. The valve seat sleeve 2 has a valve seat radial extension platform in the middle to install the static magnet 4. The outlet end of the valve seat sleeve 2 forms the second sealing section 201 and the second expansion section 202.

[0052] In the above technical solution, the cylinder is designed as a sleeve 6 and a valve seat sleeve 2. The sleeve 6 is used to fix the flow guide plug 7 and the static magnet 4. The static magnet 4 is set at the height of the overlap between the sleeve 6 and the valve seat sleeve 2. The static magnet 4 is set on the radial extension platform of the valve seat and is fixedly connected to the sleeve 6 and the valve seat sleeve 2 on the outside and inside respectively. A return spring 3 is set between the inlet end of the valve seat sleeve 2 and the moving magnet 5. The outlet end of the valve seat sleeve 2 is slidably connected to the valve core shaft 1, so as to form a radial boss inside the cylinder, which is convenient for installing components and also facilitates the formation of a valve to realize secondary atomization spray.

[0053] The number of devices and processing scale described herein are for the purpose of simplifying the description of the invention. Applications, modifications, and variations of the invention will be readily apparent to those skilled in the art.

[0054] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A valve core assembly structure for gas-assisted atomization, characterized in that, include: cylindrical body; A flow guide plug is provided at the inlet end of the cylinder. The flow guide plug has an axially penetrating liquid phase channel located at the center. The flow guide plug also has circumferentially distributed axially penetrating gas phase channels. The liquid phase channel has a narrowed diameter structure, and the axial length of the liquid phase channel is longer than that of the gas phase channel. A valve spindle, driven by a power mechanism, is axially movable inside the cylinder. The inlet end of the valve spindle is an open end. The inlet end of the valve spindle surrounds the outlet end of the liquid phase channel and forms a circumferential channel within its axial stroke range, and forms a certain axial distance with the gas phase channel. The outlet end of the valve spindle is a closed end. An overflow hole is provided near the outlet end of the valve spindle. The outlet end of the valve spindle and the outlet end of the cylinder form a valve. The valve spindle outlet end includes a first sealing section and a first expansion section, and the cylinder outlet end is provided with a second sealing section and a second expansion section. When the first sealing section and the second sealing section engage with the valve spindle and move axially until the first sealing section abuts against the second sealing section, the valve is closed. When the valve spindle moves axially until the first sealing section and the second sealing section form a circumferential gap, the valve is opened, and the first expansion section and the second expansion section form a circumferential expansion gap.

2. The valve core assembly structure for gas-assisted atomization as described in claim 1, characterized in that, The inlet end of the flow guide plug is provided with a radial extension platform for installation on the inlet end of the cylinder. An axial boss is formed by protruding at the center of the outlet end of the flow 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 a circumferential channel.

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

4. The valve core assembly structure for gas-assisted atomization as described in claim 1, characterized in that, The valve core shaft is provided with at least one annular guide boss on its exterior, allowing the valve core shaft to be axially movable inside the cylinder.

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

6. The valve core assembly structure for gas-assisted atomization as described in claim 1, characterized in that, The liquid phase channel consists of multiple cylindrical cavities arranged coaxially with decreasing inner diameters.

7. The valve core assembly structure for gas-assisted atomization as described in claim 2, characterized in that, The power mechanism includes a moving magnet, a stationary magnet, and a return spring. The stationary magnet is fixedly disposed inside the cylinder. The moving magnet is disposed opposite to the stationary 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 enclose the axial boss. A recess is formed at the bottom of the moving magnet. A radial boss is formed inside the cylinder. The return spring is disposed between the recess and the radial boss. When the moving magnet is attracted to the stationary magnet under the action of an external electromagnetic field, the return spring is compressed, and the valve core shaft moves axially to form a circumferential gap between the first sealing section and the second sealing section, thus opening the valve. When the moving magnet separates from the stationary magnet under the action of the return spring, the valve core shaft moves axially to the point where the first sealing section abuts against the second sealing section, thus closing the valve.

8. The valve core assembly structure for gas-assisted atomization as described in claim 7, characterized in that, The cylindrical body includes: The sleeve has a radial extension platform for the flow guide plug at its inlet end and a static magnet installed at its outlet end. A valve seat sleeve has its inlet end extending into the outlet end of the sleeve. The inlet end of the valve seat sleeve forms the radial boss for mounting the return spring. A valve seat radial extension platform is provided in the middle of the valve seat sleeve for mounting the stationary magnet. The outlet end of the valve seat sleeve forms the second sealing section and the second expansion section.

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