Electromagnetic atomizing nozzle

Abstract

The utility model relates to an electromagnetic type atomizing nozzle which comprises a nozzle body, a rotary core and an electromagnetic valve, a cavity which penetrates through two ends of the nozzle body and allows liquid to flow is arranged in the nozzle body, one end of the cavity is a liquid inlet end, the other end of the cavity is a liquid outlet end, and the rotary core is arranged at the position, close to the liquid inlet end, in the cavity. According to the utility model, the fire extinguishing agent is accelerated and centrifugally atomized through the spray head, meanwhile, the atomization effect is good, the fire extinguishing agent is quickly extinguished in a fixed-point and concentrated manner, and the spray head sprays the fire extinguishing agent in a point-to-point manner to extinguish the fire; while fire extinguishing is reliable, resources can be saved, and waste is reduced.

Description

Technical Field

[0001] The utility model relates to the field of fire sprinklers, in particular to an electromagnetic atomizing sprinkler head. Background Art

[0002] At present, atomizing sprinkler heads are widely used in the field of fire extinguishing. However, the existing atomizing sprinkler heads have poor liquid fragmentation effect, resulting in uneven spraying droplets, which affects the fire extinguishing effect. And most of them are open sprinkler heads at present, which cannot control the opening time and opening times of the sprinkler head to achieve the purpose of controlling the spraying dose and spraying times, often causing waste of resources, and cannot concentrate the limited fire extinguishing agent on the fire source to quickly extinguish the fire, often causing the spread of the fire, bringing irreparable economic losses and accidents. Content of the Utility Model

[0003] To solve the above technical problems, the utility model discloses an electromagnetic atomizing sprinkler head, which comprises a sprinkler head body, a swirler core and an electromagnetic valve. The sprinkler head body has a cavity that penetrates through both ends for liquid to flow through. One end of the cavity is the liquid inlet end, and the other end is the liquid outlet end. The swirler core is arranged in the cavity near the liquid inlet end. The electromagnetic valve comprises a valve body and a valve core. The valve body has a passage for fluid to pass through. The valve core is arranged in the valve body and can block the passage. The liquid inlet end is communicated with the passage of the valve body. The swirler core comprises a flow dividing plate and inclined plates fixed on both sides of the flow dividing plate. The flow dividing plate longitudinally divides the cavity. The inclined plates form an "X"-shaped intersecting slope on both sides of the flow dividing plate. The intersection point is at the center of the bottom of the flow dividing plate. An over-flow channel is formed between the inclined plates and the cavity side wall, which faces from one side of the flow dividing plate to the opposite side. The flow dividing plate and the inclined plates together form a spiral structure for dividing and centrifuging the liquid.

[0004] Specifically, an opening is provided on the side of the inclined plate at the bottom of the swirler core. The opening penetrates through the inclined plate surface along the slope direction of the opposite inclined plate, and the openings on both inclined plates are arranged oppositely, forming an expansion port on the swirler core for the water flow to cross each other.

[0005] Specifically, the cavity comprises a first cavity and a second cavity. The first cavity and the second cavity are respectively communicated with the liquid inlet end and the liquid outlet end. The inner diameter of the second cavity is larger than that of the first cavity, forming a stepped through structure. The swirler core is arranged in the first cavity.

[0006] Specifically, the cross-section of the over-flow channel at the plane where the flow dividing plate is located is an equilateral triangle.

[0007] Specifically, it further comprises a swivel joint. The liquid inlet end of the sprinkler head body is rotatably connected with the valve body through the swivel joint. The swivel joint has a channel with a turning connection. The end of the swivel joint connected to the liquid inlet end is straight and forms a steady flow cavity inside.

[0008] Specifically, the solenoid valve further includes a valve cover. The valve body is provided with a main valve cavity for the spool to move, and is connected to the valve cover at the top of the main valve cavity. The spool divides the main valve cavity into an upper cavity and a lower cavity. The valve body is provided with an inlet port and an outlet port. The inlet port is communicated with the outlet port through the lower cavity to form a liquid passage. A protrusion is provided on the liquid passage in the valve body. The spool is in limit fit with the inner wall of the main valve cavity to form a piston structure that can abut against the protrusion and block the liquid passage.

[0009] Specifically, an elastic member and a balance hole are provided on the spool. The balance hole communicates the upper cavity and the lower cavity. The elastic member is arranged between the spool and the valve cover, and has elastic potential energy and abuts against the spool and the valve cover at both ends respectively.

[0010] Specifically, the solenoid valve further includes an iron core assembly and a coil assembly. The coil assembly is arranged around the iron core assembly. A pilot cavity, a communication channel and a drain hole are provided in the valve cover. The pilot cavity is communicated with the upper cavity through the communication channel, and the pilot cavity is communicated with the outlet port through the drain hole. The iron core assembly is movably arranged in the pilot cavity to block or open the drain hole.

[0011] Specifically, the iron core assembly includes a moving iron core and a static iron core. One end of the moving iron core is connected to the static iron core through an elastic device, and the other end faces the drain hole to form a sealing structure that is stressed and movable.

[0012] Advantages and effects

[0013] Through the cooperation of the rotating core and the cavity structure, the fire extinguishing agent is accelerated and centrifugally collided, and the atomization effect is uniform, realizing rapid fire extinguishing; by setting the size of the opening and the flow-through channel on the rotating core, the flow rate and the atomization effect are further controlled; through the conical hole and the swivel joint, the fire extinguishing agent is concentrated for fire extinguishing at a fixed point, improving the fire extinguishing efficiency; the solenoid valve is used to control the flow of the fire extinguishing agent, and the spraying dose and the spraying times are controlled. Brief description of the drawings

[0014] Figure 1 It is a schematic structural diagram of the electromagnetic atomizing nozzle of the present utility model;

[0015] Figure 2 It is a schematic structural diagram of the atomizing nozzle of the present utility model;

[0016] Figure 3 It is a schematic structural diagram of the rotating core of the present utility model;

[0017] Figure 4 It is a schematic structural diagram of the solenoid valve of the present utility model.

[0018] Legend: 1. Sprinkler body; 11. Liquid inlet end; 12. Cavity; 121. First cavity; 122. Second cavity; 13. Liquid outlet end; 2. Rotating core; 21. Inclined plate; 211. Opening; 22. Flow dividing plate; 23. Flow passage; 3. Solenoid valve; 31. Inflow port; 32. Outflow port; 33. Valve body; 331. Main valve cavity; 3311. Upper cavity; 3312. Lower cavity; 333. Protrusion; 34. Valve core; 341. Balance hole; 342. Elastic member; 35. Valve cover; 351. Pilot cavity; 352. Communication passage; 353. Drain hole; 36. Iron core assembly; 361. Moving iron core; 362. Static iron core; 37. Coil; 4. Swivel joint; 41. Flow stabilizing cavity. Detailed implementation mode

[0019] The following further illustrates the present utility model in conjunction with embodiments, but is not limited to the content in the specification.

[0020] In the claims, the specification and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., are for distinguishing different objects rather than for describing a specific order.

[0021] In the claims, the specification and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, for orientation terms, when using terms such as "center", "horizontal", "longitudinal", "level", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. to indicate the orientation or position relationship, it is based on the orientation and position relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the present utility model.

[0022] In the claims, the specification and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, when using terms such as "fixed connection" or "fixedly connected", should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, including non-detachable fixed connection, detachable fixed connection, being integrated as one body, and being fixedly connected through other devices or elements.

[0023] In the claims, the specification and the above-mentioned drawings of the present utility model, when using terms such as "comprising", "having" and their variants, are intended to mean "including but not limited to".

[0024] Such as Figures 1 - 3As shown in the figure, the utility model relates to an electromagnetic atomizing nozzle, which comprises a nozzle body, a swirl core and a solenoid valve. The nozzle body 1 has a cavity 12 that penetrates both ends for liquid to flow through. One end of the cavity 12 is the liquid inlet end 11, and the other end is the liquid outlet end 13. The swirl core is arranged in the cavity 12 near the liquid inlet end 11. The cavity 12 is columnar to prevent the fire extinguishing agent passing through the swirl core 2 from accumulating and decelerating at the dead corners of the inner wall. The swirl core 2 is fixedly connected to the nozzle body 1 and is in close fit with the side wall of the cavity 12. The swirl core 2 includes a flow dividing plate 22 and inclined plates 21 fixed on both sides of the flow dividing plate 22. The flow dividing plate 22 longitudinally divides the cavity 12. The inclined plates 21 form "X"-shaped intersecting slopes on both sides of the flow dividing plate 22. The intersection point is at the center of the bottom of the flow dividing plate 22. An over-flow channel 23 is formed between the inclined plate 21 and the side wall of the cavity 12, which faces from one side of the flow dividing plate 22 to the opposite side. The flow dividing plate 22 and the inclined plates 21 together form a spiral structure for dividing and centrifuging the liquid. The inclined plates 21 are arranged in an inclined semi-circular shape and intersect on both sides of the flow dividing plate 22. The flow dividing plate 22 is located above the intersection point. The directions of the two over-flow channels 23 are both clockwise or counterclockwise and do not interfere with each other. The outlet of the over-flow channel 23 faces the side wall of the cavity 12 on the opposite side.

[0025] When the fire extinguishing agent is divided into two streams by the swirl core 2, the flow direction of the fire extinguishing agent is changed and accelerated through the swirl core 2, obtaining centrifugal force and acceleration. The two streams of fire extinguishing agent passing through the over-flow channel 23 collide with each other at the bottom cavity and collide with the side wall of the cavity 12, quickly atomizing to form fine droplets. When the fire extinguishing agent is fully atomized in the cavity 12, the fire extinguishing agent is ejected through the liquid outlet end 13.

[0026] As Figure 1 shown, preferably, the liquid outlet end 13 adopts a conical opening, and the opening size and angle of the conical opening 13 are set according to different ignition sources to control the spraying angle and coverage range of the fire extinguishing agent.

[0027] The solenoid valve 3 includes a valve body 33 and a valve core 34. The valve body 33 has a passage for fluid to pass through. The valve core 34 is arranged in the valve body 33 and can block the passage. The liquid inlet end 11 is connected to the passage of the valve body 33. The opening and closing of the valve are controlled by connecting to the background controller through the solenoid valve 3. In this way, the atomizing nozzle has the functions of rapid start, quantitative and fractional start for fire extinguishing. When a fire occurs, the background controller supplies power to the solenoid valve 3 to open it. The fire extinguishing agent quickly passes through the valve and enters the atomizing nozzle, is atomized through the cavity 12 and the swirl core 2 and then ejected, and is evenly sprayed onto the protected area or the equipment and facilities to be protected to implement fire extinguishing. By controlling the number of power-on times and the power-on duration of the solenoid 3, the fire extinguishing agent can be sprayed in fractions and quantities, achieving the purpose of quickly extinguishing the open fire and continuously cooling down to prevent re-ignition.

[0028] As Figure 2 、 Figure 3As shown in the figure, an opening 211 is provided on the side of the inclined plate 21 at the bottom of the rotating core. The opening 211 penetrates through the plate surface of the inclined plate 21 along the slope direction of the inclined plate 21 on the opposite side, and the openings 211 on the two inclined plates 21 are arranged opposite to each other, forming a flow expansion port on the rotating core where water flows cross each other. The fire extinguishing agent passing through the rotating core 2 is centrifuged and accelerated. Since the two inclined plates 21 do not interfere with each other, the two streams of fire extinguishing agent flowing out of the rotating core 2 cannot collide with each other immediately. By opening the opening 211 on the inclined plate 21, the outlet of the flow passage 23 is expanded, and the fire extinguishing agents ejected from the two opposite openings 211 can collide with each other, and continue to collide and atomize rapidly in the cavity 12 along with the water pressure, making the ejected droplet sizes uniform and the fire extinguishing rapid and effective.

[0029] The cavity 12 includes a first cavity 121 and a second cavity 122. The first cavity 121 and the second cavity 122 are respectively connected to the liquid inlet end 11 and the liquid outlet end 13. The inner diameter of the second cavity 122 is larger than that of the first cavity 121, forming a stepped through structure. The rotating core is arranged in the first cavity 121.

[0030] The rotating core 2 is fixed in the first cavity 121 to avoid kinetic energy loss caused by the rotation of the rotating core driven by the liquid. At the same time, it is arranged at one end close to the second cavity 122, so that the fire extinguishing agent can directly enter the second cavity 122 with a larger space to fully collide and break after passing through the rotating core 2. And because it enters from a thinner pipe diameter into a thicker pipe diameter, there is enough distance between the fire extinguishing agent droplets to avoid mutual aggregation, and then the atomized fire extinguishing agent is sprayed through the conical hole of the liquid outlet end 13 to extinguish the fire.

[0031] The cross-section of the flow passage 23 at the plane where the baffle plate 22 is located is an equilateral triangle. The cross angle on the side of the inclined plate 21 can be set to 60°. In this way, the water flow cross-section at the outlet position of the flow passage 23 is an equilateral triangle. If the cross angle is too large, the amount of the fire extinguishing agent flowing out of the flow passage 23 increases, the flow rate becomes slow and there is no large centrifugal force, and the liquid entering the second cavity 122 breaks unevenly and the atomization effect is not good; if the cross angle is too small, the flow cross-section of the liquid is small, the flow rate is too fast and unstable, the droplets break unevenly, and they are ejected without being fully atomized, which also affects the stability of the nozzle. Using an equilateral triangle outflow cross-section can not only make the liquid generate centrifugal force and acceleration to break each other, but also atomize evenly while atomizing at high speed, and the fire extinguishing effect is good.

[0032] As Figure 1 shown in the figure, it further includes a swivel joint 4. The liquid inlet end 11 of the nozzle body is rotatably connected to the valve body 33 through the swivel joint 4. The swivel joint 4 has a channel with a turning connection. The swivel joint 4 can be formed by connecting one or more internal and external thread elbows to each other. By rotating the elbow, the orientation of the nozzle body 1 can be controlled, and the fire extinguishing agent can be quickly and accurately sprayed onto the flammable substances or key protected areas in the area. Or a spherical joint and other movable joint structures can also be used for multi-angle adjustment.

[0033] The end of the swivel joint 4 connected to the liquid inlet end 11 is straight and forms a steady flow chamber 41 inside. The connecting section between the swivel joint 4 and the nozzle body 1 is straight, enabling the fire extinguishing agent whose flow direction is changed to flow linearly in the steady flow chamber 41 for a certain distance, reducing the turbulence and pressure loss at the turning points of the liquid passage, and simultaneously reducing the damage to the swirl core 2 and the surrounding pipelines caused by the stress of high-speed flow and liquid direction change.

[0034] As Figure 4 shown, the solenoid valve 3 further includes a valve cover 35. The valve body 33 is provided with a main valve chamber 331 for the valve core 34 to move, and is connected to the valve cover 35 at the top of the main valve chamber 331. The valve body 33 closes the main valve chamber 331 by connecting with the valve cover 35. Meanwhile, an annular sealing ring is provided at the connection end to prevent gas leakage from the connection.

[0035] The valve core 34 divides the main valve chamber 331 into an upper chamber 3311 and a lower chamber 3312. The valve body 33 is provided with an inlet port 31 and an outlet port 32. The inlet port 31 communicates with the outlet port 32 through the lower chamber 3312 to form a liquid passage. A protrusion 333 is provided on the liquid passage in the valve body 33. The valve core 34 is in limit fit with the inner wall of the main valve chamber 331 to form a piston structure that can abut against the protrusion 333 and block the liquid passage. The valve core 34 makes a piston movement in the main valve chamber 331 through the pressure change in the upper chamber 3311 and the lower chamber 3312 and an additional external force. The external force source can be an elastic member or a mechanical driving device. The protrusion 333 blocks the direct communication between the inlet port 31 and the outlet port 32, so that after the fire extinguishing agent enters from the inlet port 31, it must flow out through the main valve chamber 331 to communicate with the outlet port 32. The valve core 34 abuts against or moves away from the protrusion 333 through piston movement to open or block the flow of the fire extinguishing agent.

[0036] During operation, by depressurizing the upper chamber 3311, the pressure difference between the lower chamber 3312 and the upper chamber 3311 is increased by the pressure of the fire extinguishing agent at the lower end, "pushing" the valve core 34 up and away from the protrusion 333, and the liquid passage is connected, enabling the fire extinguishing agent to enter the atomizing nozzle through the outlet port 32.

[0037] A sealing ring is provided on the circumferential side of the valve core 34, which is in close fit with the main valve chamber 331, not hindering the movement of the valve core 34 and at the same time preventing the fire extinguishing agent from flowing in through the gap between the valve core 34 and the main valve chamber 331. A buffer pad is provided at the abutting position between the bottom of the valve core 34 and the protrusion 333 to avoid damage to the valve core 34 when the passage is closed.

[0038] As Figure 4As shown in the figure, an elastic member 342 and a balance hole 341 are provided on the valve core 34. The balance hole 341 communicates with the upper chamber 3311 and the lower chamber 3312. The elastic member 342 is arranged between the valve core 34 and the valve cover 35. The elastic member 342 has elastic potential energy and abuts against the valve core 34 and the valve cover 35 at both ends respectively. The balance hole 341 has a small aperture, one end is connected to the upper chamber 3311 and the other end is communicated with a position on one side of the inflow port 31, and is used to slowly balance the pressure. When the fire extinguishing is completed, the upper chamber 3311 stops releasing pressure, and the balance hole 341 gradually balances the pressures of the upper and lower chambers. At the same time, under the action of the elastic member 342, the pressure on the side of the upper chamber 3311 of the valve core 34 is greater than that on the side of the lower chamber 3312, so that the valve core 34 abuts against the protrusion 333, completing the blocking of the liquid passage, and the fire extinguishing agent stops entering the atomizing nozzle.

[0039] The solenoid valve 3 further includes an iron core assembly 36 and a coil assembly 37. The coil assembly 37 is arranged around the iron core assembly 36. The iron core assembly 36 and the coil assembly 37 together form an electromagnet and are connected to a wiring terminal to transmit an electrical signal.

[0040] A pilot chamber 351, a communication channel 352 and a drain hole 353 are provided in the valve cover 35. The pilot chamber 351 is opened in the valve cover 35 at the upper part of the main valve chamber 331. The communication channel 352 is a through hole in the valve cover 35. The pilot chamber 351 and the upper chamber 3311 communicate with each other through the communication channel 352, and the pilot chamber 351 communicates with the outflow port 32 through the drain hole 353. The iron core assembly 36 is movably arranged in the pilot chamber 351 to block or open the drain hole 353.

[0041] When the solenoid valve 3 is not powered on, the iron core assembly 36 blocks the drain hole 353, and the pressures in the pilot chamber 351, the main valve chamber 331 and the inflow port 31 are balanced and higher than the atmospheric pressure. When a fire breaks out, the solenoid valve 3 is powered on to drive the iron core assembly 36 to open the drain hole 353. The air pressure in the pilot chamber 351 drops rapidly with the drain hole 353, and the upper chamber 3311 of the connected main valve chamber 331 is rapidly depressurized, so that the pressure of the lower chamber 3312 on the valve core 34 is greater than that of the upper chamber 3311, driving the valve core 34 to move upward, connecting the liquid channels of the inflow port 31, the lower chamber 3312 and the outflow port 32, so that the fire extinguishing agent enters the nozzle and is centrifuged and atomized through the cavity 12 and the rotating core 2 and then sprayed to extinguish the fire.

[0042] The outflow port 32 is communicated through the drain hole 353, and a small part of the fire extinguishing agent entering the pilot chamber 351 from the main valve chamber 331 is carried away with the fire extinguishing agent at the outflow port 32, reducing the leakage of the fire extinguishing agent and the residual fire extinguishing agent in the pilot chamber 351 at the same time. By providing the pilot chamber 351 and the main valve chamber 331, the iron core assembly 36 can quickly drain through the pressure difference after being powered on and opened, and the double-connected chamber setting reduces the influence of the fire extinguishing agent on the electromagnetic control structure and improves the durability of the equipment.

[0043] As Figure 4As shown in the figure, the iron core assembly 36 includes a moving iron core 361 and a static iron core 362. One end of the moving iron core 361 is connected to the static iron core 362 through an elastic device, and the other end forms a sealing structure that is stressed and movable towards the drain hole 353. When the coil assembly 37 is not energized, under the action of the elastic device, the moving iron core 361 abuts against the outer edge of the drain hole 353 for sealing. When the solenoid valve 3 is energized and the coil assembly 37 is powered on, the static iron core 362 generates an electromagnetic attraction force to move the moving iron core 361 upward, and at the same time opens the drain hole 353. Subsequently, the pilot chamber 251 and the upper chamber 3311 are depressurized, the spool 34 moves upward, and the inlet port 31 and the outlet port 32 are communicated to release the fire extinguishing agent.

[0044] Preferably, a protrusion is formed on the outer peripheral side of the drain hole 353, and a buffer member is provided at the end of the moving iron core 361 to abut against the outer periphery of the drain hole 353, which not only reduces the damage of the end of the moving iron core 361 after multiple openings and closings, but also avoids the large contact surface of the moving iron core 361, resulting in excessive tension and difficulty in driving the electromagnet.

[0045] Obviously, the above-described embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the embodiments of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the embodiments here. Any obvious changes or modifications derived from the technical solutions of the present invention still fall within the protection scope of the present invention.

Claims

1. An electromagnetic atomizing nozzle, characterized in that: The invention comprises a nozzle body (1), a rotary core (2) and an electromagnetic valve (3). The nozzle body (1) has a cavity (12) with two ends through which liquid can flow. One end of the cavity (12) is a liquid inlet end (11) and the other end is a liquid outlet end (13). The rotary core (2) is arranged in the cavity (12) at a position close to the liquid inlet end (11). The electromagnetic valve (3) comprises a valve body (33) and a valve core (34). The valve body (33) has a passage for fluid to pass through. The valve core (34) is arranged in the valve body (33) and can block the passage. The liquid inlet end (11) is a liquid outlet end (13). ) is a passage connected to the valve body (33), the swirl core (2) comprises a diverter plate (22) and inclined plates (21) fixed on both sides of the diverter plate (22), the diverter plate (22) longitudinally divides the cavity (12), the inclined plates (21) form "X"-shaped intersecting slopes on both sides of the diverter plate (22), the intersection point is at the bottom center of the diverter plate (22), and a flow passage (23) is formed between the inclined plate (21) and the side wall of the cavity (12) from one side of the diverter plate (22) to the opposite side, and the diverter plate (22) and the inclined plate (21) together form a spiral structure for diverting and centrifuging liquid.

2. The electromagnetic atomizing nozzle according to claim 1, characterized in that: An opening (211) is provided on the side of the inclined plate (21) at the bottom of the swirl core (2), and the opening (211) penetrates the plate surface of the inclined plate (21) along the slope direction of the inclined plate (21) on the opposite side, and the openings (211) on the inclined plates (21) on both sides are arranged opposite to each other, forming a flow expansion port on the swirl core (2) that allows water flows to cross each other.

3. The electromagnetic atomizing nozzle according to claim 1, characterized in that: The cavity (12) comprises a first cavity (121) and a second cavity (122); the first cavity (121) and the second cavity (122) are respectively connected to a liquid inlet end (11) and a liquid outlet end (13); the inner diameter of the second cavity (122) is larger than the inner diameter of the first cavity (121) to form a stepped through structure; and the rotary core (2) is arranged in the first cavity (121).

4. The electromagnetic atomizing nozzle according to claim 1, characterized in that: The cross section of the flow passage (23) at the plane where the plate surface of the diverter plate (22) is located is an equilateral triangle.

5. The electromagnetic atomizing nozzle according to claim 1, characterized in that: It also comprises a steering joint (4), the liquid inlet end (11) of the nozzle body (1) is rotatably connected to the valve body (33) via the steering joint (4), a turning connecting channel is provided inside the steering joint (4), the end portion of the steering joint (4) connected to the liquid inlet end (11) is in a straight line and forms a steady flow cavity (41) inside.

6. The electromagnetic atomizing nozzle according to claim 1, characterized in that: The solenoid valve (3) further comprises a valve cover (35), the valve body (33) being provided with a main valve chamber (331) for movement of a valve core (34), and being connected to the valve cover (35) at the top of the main valve chamber (331), the valve core (34) dividing the main valve chamber (331) into an upper chamber (3311) and a lower chamber (3312), the valve body (33) being provided with an inlet (31) and an outlet (32), the inlet (31) being connected to the outlet (32) via the lower chamber (3312) to form a liquid passage, a protrusion (333) being provided on the liquid passage in the valve body (33), the valve core (34) being limitedly matched with the inner wall of the main valve chamber (331) to form a piston structure capable of abutting against the protrusion (333) and blocking the liquid passage.

7. The electromagnetic atomizing nozzle according to claim 6, characterized in that: The valve core (34) is provided with an elastic member (342) and a balancing hole (341), the balancing hole (341) communicating with the upper chamber (3311) and the lower chamber (3312), the elastic member (342) being arranged between the valve core (34) and the valve cover (35), the elastic member (342) having elastic potential energy and having two ends respectively abutting against the valve core (34) and the valve cover (35).

8. The electromagnetic atomizing nozzle according to claim 6, characterized in that: The solenoid valve (3) further comprises an iron core assembly (36) and a coil assembly (37), wherein the coil assembly (37) is arranged around the iron core assembly (36), and a pilot chamber (351), a connecting channel (352) and a leakage hole (353) are arranged in the valve cover (35), wherein the pilot chamber (351) and the upper chamber (3311) are connected to each other through the connecting channel (352), and the pilot chamber (351) is connected to the outlet (32) through the leakage hole (353), and the iron core assembly (36) is movably arranged in the pilot chamber (351) to block or open the leakage hole (353).

9. The electromagnetic atomizing nozzle according to claim 8, characterized in that: The iron core assembly (36) comprises a moving iron core (361) and a stationary iron core (362); one end of the moving iron core (361) is connected to the stationary iron core (362) via an elastic device, and the other end faces the leakage hole (353) to form a force-active blocking structure.

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