Pneumatic-electric cooperative control type variable spray head and spraying device

Abstract

The invention relates to a pneumoelectric cooperative control type variable spray head and a spraying device. The pneumoelectric cooperative control type variable spray head comprises a spray head body, a liquid inlet runner is arranged in the spray head body, a liquid outlet runner is arranged on the inner side of the liquid inlet runner, a liquid outlet part of a liquid flow cavity extends into the liquid outlet runner, and the liquid outlet part is connected with a cavity part of the liquid flow cavity; a liquid channel communicated with the cavity part is formed in the liquid outlet part, a plurality of through holes are formed in the cavity part, a diaphragm is arranged at an inlet of the liquid channel, a liquid channel is formed in one side of the diaphragm, a valve element is arranged on the other side of the diaphragm, the first end of the valve element extends into a limiting sleeve, an elastic piece is arranged between the first end of the valve element and the limiting sleeve, and the limiting sleeve is fixed in the cavity part; an electromagnetic iron core is arranged on the outer side of the second end of the valve element, a coil is arranged on the periphery of the electromagnetic iron core, the inner space of the limiting sleeve further communicates with an air inlet connector, the air inlet connector is connected to the valve element cavity and used for being connected with an air supply system, and the liquid pressure adjusting range allowed by the sprayer is wider.

Description

A gas-electric coordinated control variable nozzle and spraying device Technical Field

[0001] This invention relates to the field of spraying equipment technology, specifically to a gas-electric co-controlled variable nozzle and spraying device. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] In agricultural and industrial spraying operations, variable displacement nozzles enable precise control of the spray volume, allowing for on-demand spraying based on actual needs and reducing waste. Particularly in pesticide and fertilizer spraying, variable displacement technology can reduce the amount of chemicals and fertilizers used, contributing to green, ecological, and sustainable agricultural production. However, traditional variable displacement technology primarily controls the flow state or cross-sectional area of ​​the control system's pipelines, resulting in slow response times, control delays, and poor synchronization. Furthermore, the solenoid valves installed on the control pipelines are typically placed directly in the liquid circuit, with the liquid flowing through the valve body, which increases maintenance difficulty and shortens service life. To address this issue, existing patent 202411927751.8 discloses a high-frequency solenoid valve and an isolated variable displacement nozzle, achieving effective isolation between the solenoid valve and the liquid path and enabling variable spraying. However, this invention, due to the fixed spring force and the constraint of the available electromagnetic force, limits the adjustable pressure range of the liquid path. Furthermore, changes in the liquid path pressure alter the interaction of the liquid path pressure, spring force, and electromagnetic force at the flow control node, thus affecting flow control accuracy and stability. Moreover, relying solely on spring force to close the liquid path during nozzle flow adjustment requires a large spring force, and the reciprocating vibration of the spring during liquid path closure also affects flow control accuracy. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a gas-electric coordinated control variable nozzle and spraying device, which has better control accuracy and stability, and avoids the problems of large spring force and spring reciprocating vibration.

[0005] To achieve the above objectives, the present invention provides the following technical solution: Firstly, embodiments of the present invention provide a gas-electric coordinated control variable nozzle, comprising a nozzle body, an annular liquid inlet channel inside the nozzle body, an outlet channel inside the liquid inlet channel, an outlet portion extending into a liquid flow cavity inside the outlet channel, the outlet portion being connected to the cavity portion of the liquid flow cavity, a liquid channel communicating with the cavity portion inside the outlet portion, multiple through holes in the cavity portion to connect the liquid inlet channel and the internal space of the cavity portion, a diaphragm at the inlet of the liquid channel, a liquid channel on one side of the diaphragm, and a valve core on the other side, a first end of the valve core extending into a limiting sleeve with an elastic element between it and the limiting sleeve, the limiting sleeve being fixed inside the cavity portion, the valve core being slidably connected inside the valve core cavity, and an electromagnet core on the outer side of the second end of the valve core, with a coil on the outer periphery of the electromagnet core, the internal space of the limiting sleeve also communicating with an air inlet interface, the air inlet interface being connected to the valve core cavity for connecting to an air supply system.

[0006] Optionally, a connector is provided between the nozzle body and the liquid flow chamber to fix the liquid flow chamber and the nozzle body together.

[0007] Optionally, the connector adopts a mounting nut, one end of which is threaded to the nozzle body, and the other end is provided with an inner boss. The inner boss cooperates with the outer boss provided in the cavity of the liquid flow cavity, and a sealing ring is provided between the inner end face of the cavity and the nozzle body.

[0008] Optionally, a sealing ring is provided between the liquid outlet and the liquid outlet channel.

[0009] Optionally, the cavity portion has multiple through holes that are evenly spaced along the circumferential direction of the cavity portion.

[0010] Optionally, one end of the valve core cavity is disposed between the cavity portion and the limiting sleeve and is threadedly connected to the cavity portion. The portion of the valve core cavity located outside the cavity portion is provided with an air intake channel. The air intake end of the air intake channel is connected to an air intake interface. The first end of the valve core extends into the interior of the limiting sleeve through an opening provided in the limiting sleeve. The air intake channel communicates with the limiting sleeve through the gap between the valve core and the inner side of the opening. Furthermore, a sealing ring is provided between the air intake interface and the outer side of the valve core cavity. Furthermore, a sealing ring is provided between the cavity portion and the valve core cavity.

[0011] Optionally, the portion of the valve core located outside the limiting sleeve is provided with a shoulder structure, which can contact the limiting sleeve to limit the movement of the valve core toward the diaphragm.

[0012] Optionally, the elastic element is a spring, which is sleeved on the outer periphery of the first end of the valve core. One end of the spring is connected to the inner side of the limiting sleeve, and the other end is embedded in the annular groove opened at the first end of the valve core.

[0013] Optionally, a sealing ring is provided between the electromagnet core and the valve core cavity.

[0014] Secondly, embodiments of the present invention provide a spraying device equipped with the gas-electric coordinated control variable nozzle described in the first aspect.

[0015] The beneficial effects of this invention are as follows: The variable nozzle of this invention is provided with an air inlet, which is connected to the internal space of the limiting sleeve. Gas can be introduced into the limiting sleeve through the air inlet. When the valve core needs to move towards the diaphragm to block the liquid outlet channel, the diaphragm can be moved by the elastic element and the air pressure inside the limiting sleeve. This optimizes the elastic force of the elastic element and avoids the need for a large elastic force. At the same time, the gas inside the limiting sleeve can play a damping role, which can effectively alleviate the reciprocating vibration phenomenon of the elastic element and increase the flow control accuracy and stability of the variable nozzle. In addition, the air inlet pressure can be adjusted so that the pressure difference between the air pressure and the liquid remains constant. This can widen the pressure range that the liquid circuit can be adjusted without affecting the flow control accuracy and stability of the liquid circuit. Attached Figure Description

[0016] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0017] Figure 1 is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 is a cross-sectional view of the overall structure of Embodiment 1 of the present invention; Figure 3 is a schematic diagram of the structure of the pneumatic-electric co-control valve of Embodiment 1 of the present invention; Figure 4 is a cross-sectional view of the pneumatic-electric co-control valve of Embodiment 1 of the present invention; Figure 5 is a schematic diagram of the structure of the liquid flow cavity of Embodiment 1 of the present invention; Figure 6 is a cross-sectional view of the liquid flow cavity of Embodiment 1 of the present invention; Figure 7 is a cross-sectional view of the assembly of the valve core cavity, valve core and electromagnet core of Embodiment 1 of the present invention; Figure 8 is a schematic diagram of the valve core cavity of Embodiment 1 of the present invention; Figure 9 is a cross-sectional view of the valve core cavity of Embodiment 1 of the present invention; Figure 10 is a schematic diagram of the structure of the electromagnet core of Embodiment 1 of the present invention; Figure 11 is a schematic diagram of the structure of the first limiting sleeve or the second limiting sleeve of Embodiment 1 of the present invention; Figure 12 is a schematic diagram of the valve core structure of Embodiment 1 of the present invention; wherein, 1. nozzle body, 2. pneumatic system, 3. pneumatic-electric Coordinated control valve, 4. Nut structure, 5. Mounting nut, 6. Liquid flow chamber, 7. Air inlet, 9. Electromagnetic core, 10. Coil, 11. Valve core, 12. Spring, 13. Limiting sleeve, 14. Valve core chamber, 15. Chamber section, 16. Curved diaphragm; 1-1. Liquid inlet channel, 1-2. Liquid outlet channel; 2-1. Gas channel; 3-1. Gas chamber; 6-1. Through hole, 6-2. Liquid passage; 8-1. Second sealing ring, 8-2. Third sealing ring, 8-3. Fourth sealing ring, 8-4. Fifth sealing ring, 8-5. First sealing ring; 9-1. First electromagnet core section, 9-2. Sealing ring mounting groove, 9-3. External thread section; 11-1. Shoulder structure; 14-1. External thread section, 14-2. Air inlet channel, 14-3. First chamber, 14-4. Second chamber. Detailed Implementation

[0018] Example 1 This example provides a pneumatic-electric co-controlled variable nozzle, as shown in Figures 1-2, including a nozzle body 1, a pneumatic system 2, and a pneumatic-electric co-controlled valve 3. The pneumatic system includes an air inlet 7 and an air supply system connected to the air inlet 7. The pneumatic-electric co-controlled valve 3 includes a liquid flow chamber 6, a valve core chamber 14, a connector, a valve core 11, an electromagnet core 9, an elastic element, and other components.

[0019] The nozzle body 1 is provided with an inlet channel 1-1 and an outlet channel 1-2. The inlet channel 1-1 adopts a ring structure, and the outlet channel 1-2 is located inside the inlet channel and is coaxially distributed with the inlet channel 1-1.

[0020] The liquid inlet channel 1-1 is connected to one end of the liquid inflow channel, which is located inside the nozzle body 1. Its inlet end is used to connect to the liquid supply system. The outlet end of the liquid outlet channel 1-2 is connected to the inlet end of the liquid outflow channel, and the outlet end of the liquid outflow channel is used to spray out the liquid.

[0021] As shown in Figures 3 and 4, the pneumatic-electric coordinated control valve 3 includes components such as a liquid flow chamber 6, a valve core chamber 14, a connector, a valve core 11, an electromagnet core 9, and an elastic element. As shown in Figures 5 and 6, the liquid flow chamber includes a cavity section 15, which is open at one end and closed at the other end. A liquid outlet is located at the center of the closed end and is coaxial with the cavity section 15. A liquid channel 6-2 is provided inside the liquid outlet and extends through the liquid outlet along the axial direction of the liquid outlet. The liquid channel 6-2 is connected to the internal space of the cavity section 15.

[0022] The liquid outlet section is matched with the liquid outlet channel 1-2, and the liquid outlet section extends into the interior of the liquid outlet channel 1-2. Therefore, the liquid channel 6-2 in the liquid outlet section is connected to the interior space of the liquid outlet channel 1-2.

[0023] Furthermore, a first sealing ring 8-5 is provided between the liquid outlet and the inner side of the liquid outlet channel 1-2. The first sealing ring 8-5 is used to seal the gap between the liquid outlet and the inner side of the liquid outlet channel 1-2.

[0024] Preferably, there are two first sealing rings 8-5, which are distributed along the axial direction of the liquid outlet. The first sealing rings 8-5 are installed in the annular mounting groove provided in the liquid outlet and are sealed and fitted to the side of the liquid outlet channel 1-2.

[0025] The closed end of the cavity 15 where the liquid outlet is located is provided with a plurality of through holes 6-1. The through holes 6-1 connect the liquid inlet channel 1-1 to the internal space of the cavity 15. Preferably, the plurality of through holes 6-1 are evenly distributed along the circumference of the cavity 15, and the circumference of the center of the plurality of through holes 15 is coaxial with the liquid outlet.

[0026] The liquid flow chamber 6 and the nozzle body 1 are connected and fixed by a connector.

[0027] The connector uses a mounting nut 5, one end of which has an internal thread structure. Correspondingly, the nozzle body 1 has an external thread structure that matches the internal thread structure. One end of the mounting nut 6 is threadedly fixed to the nozzle body 1 through the internal and external thread structures. The other end of the mounting nut 5 has an inner boss extending inward. Preferably, the inner boss is an annular boss. Correspondingly, the outer side of the cavity 15 has an outer boss extending outward. The outer boss is located on the side of the inner boss facing the nozzle body and fits against the inner boss.

[0028] Furthermore, a second sealing ring 8-1 is provided between the end face of the cavity 15 and the end face of the nozzle body 1. The second sealing ring 8-1 is used to seal the cavity 15 and the nozzle body 1.

[0029] By turning to the mounting nut, the inner boss can press the liquid flow cavity against the end face of the nozzle body, thus achieving the fixation between the liquid flow cavity and the nozzle body.

[0030] A diaphragm is provided on one side of the liquid inlet end of the liquid channel 6-2 of the liquid outlet section. In this embodiment, the diaphragm is a curved diaphragm 16. The curved diaphragm 16 can deform. When the curved diaphragm 16 protrudes towards the side of the liquid channel 6-2, it can block the liquid inlet end of the liquid channel 6-2. When the curved diaphragm 16 protrudes towards the side away from the liquid channel 6-2, it can open the liquid inlet end of the liquid channel 6-2.

[0031] The outer edge of the curved diaphragm 16 is fixed to the inner surface of the cavity portion 15 of the liquid flow cavity 6.

[0032] The cavity 15 has a limiting sleeve 13 inside. One side of the limiting sleeve 13 is open and faces the curved diaphragm 16. The open side end face of the limiting sleeve is pressed against the outer edge of the curved diaphragm 16.

[0033] The limiting sleeve 13 has a gas chamber 3-1 inside. One side of the limiting sleeve 13 is open, and the center of the other side has an opening. The first end of the valve core 11 extends into the gas chamber 3-1 inside the limiting sleeve 13 through the opening. The diameter of the opening is larger than the diameter of the part of the valve core 11 that passes through the opening, so that there is a gap between the surface of the valve core 11 and the opening.

[0034] Furthermore, in order to facilitate the assembly of the limiting sleeve 13 and the valve core 11, the limiting sleeve 13 is composed of a first limiting sleeve part and a second limiting sleeve part spliced ​​together. The first limiting sleeve part and the second limiting sleeve part have the same structure and are spliced ​​together to form the entire limiting sleeve 13.

[0035] As shown in Figures 7-9, one end of the valve core cavity 14 is provided with an external thread section 14-1. The external thread section 14-1 is located between the inner side of the cavity 15 and the outer side of the limiting sleeve 13. The external thread section 14-1 is threadedly connected to the cavity 15 through the internal thread structure provided on the inner side of the cavity 15. The end face of the external thread section 14-1 presses against the surface of the annular boss provided on the open side of the limiting sleeve 13. The radial outer side of the annular boss fits against the inner side of the cavity 15. The external thread section 14-1 presses the annular boss against the outer edge of the cavity 15 and the curved film 16, thereby fixing the limiting sleeve 13.

[0036] Furthermore, a nut structure 4 is provided on one side of the external thread section 14-1, and a third sealing ring 8-2 is provided between the nut structure 4 and the open end face of the cavity part 15 for sealing the valve core cavity 14 and the cavity part 15.

[0037] The nut structure has an air intake channel 14-2. The air intake end of the air intake channel 14-2 is threadedly connected to an air intake interface 7. The air intake interface 7 has a gas flow channel 2-1 that communicates with the air intake channel. The air intake interface 7 is used to connect to the air supply system. The air outlet end of the air intake channel is connected to the internal space of the limiting sleeve 13 through the gap between the valve core 11 and the side of the opening.

[0038] The air intake interface 7 can be made using existing technology, and its specific structure will not be described in detail here.

[0039] The gas supply system can introduce gas at a set pressure into the limiting sleeve 13 through the air inlet 7 and the air inlet channel.

[0040] Furthermore, a fourth sealing ring 8-3 is provided between the air intake interface 7 and the outer side of the nut structure to seal the air intake interface 7 and the nut structure.

[0041] The valve core 11 includes a first valve core portion, a second valve core portion, and a third valve core portion arranged sequentially. The diameter of the first valve core portion is larger than the diameter of the opening on the limiting sleeve 13, the diameter of the third valve core portion is larger than the diameter of the opening on the limiting sleeve 13, and the second valve core portion passes through the opening, with the diameter of the second valve core portion being smaller than the diameter of the opening.

[0042] As shown in Figure 12, since the diameter of the first valve core is larger than the diameter of the opening, a shoulder structure is formed between the first valve core and the second valve core. Therefore, the shoulder structure 11-1 formed by the first valve core and the second valve core can contact the outer side of the limiting sleeve 13 to limit the movement of the valve core. The outer side of the sealing end of the limiting sleeve 13 forms a positioning surface 13-2.

[0043] The first valve core is slidably connected to the valve core cavity 14, thereby enabling the valve core 22 to perform linear reciprocating motion along its own axis.

[0044] In this embodiment, the valve core cavity 14 is divided into a first cavity 14-3 and a second cavity 14-4. The first cavity 14-3 is used to accommodate the limiting sleeve 13. The second cavity 14-4 is slidably connected to the first valve core. An electromagnet core 9 is provided on the outer side of the first valve core, that is, the electromagnet core 9 is located on the outer side of the second end of the valve core 11. The electromagnet core 9 is partially located inside the first cavity 14-3 and a fifth sealing ring 8-4 is provided between it and the inner side of the first cavity 14-3. The fifth sealing ring 8-4 is used to seal the electromagnet core 9 and the first cavity 14-3.

[0045] Specifically, as shown in Figure 10, the first electromagnet core 9-1 located inside the first cavity 14-3 is provided with a sealing ring mounting groove 9-2, and the fifth sealing ring 8-4 is installed inside the sealing ring mounting groove 9-2.

[0046] The diameter of the second electromagnet core 9 located outside the valve core cavity 14 is larger than the diameter of the first electromagnet core 9-1. The end face of the second electromagnet core 9 is in contact with the outer end face of the valve core cavity 14. One end of the second electromagnet core 9 is connected to the first electromagnet core 9-1, and the other end is provided with an external thread section 9-3. The outer end of the electromagnet core 9 is fixed to the fixed end cover through the external thread section 9-3. The fixed end cover is fixed to the outer housing.

[0047] The first cavity 14-3 and the electromagnet core 9 are also wrapped with a coil 10. The coil 10 is located inside the outer shell and is connected to a power source. The power source can energize and de-energize the coil.

[0048] When the coil 10 is energized, the electromagnet core 9 can generate an attraction force on the valve core 11, driving the valve core 11 to move in a straight line away from the curved diaphragm 16.

[0049] An elastic element is provided between the first end of the valve core 11 located inside the limiting sleeve 13 and the limiting sleeve, that is, an elastic element is provided between the third valve core part of the valve core 11 and the limiting sleeve 13. The elastic element is a spring 12. The spring 12 is sleeved on the outer periphery of the first end of the valve core 11. One end of the spring 12 abuts or is fixedly connected to the inner side of the closed end of the limiting sleeve 13, as shown in Figure 11. The inner side of the closed end of the limiting sleeve serves as the spring connecting surface 13-1, and the outer side is used to contact the shoulder structure as the positioning surface 13-2. The other end of the spring 12 is embedded in the annular groove provided in the valve core 11 and is fixedly connected to the valve core 11 or abuts against the groove surface of the annular groove.

[0050] Under the elastic force of the spring 12, the valve core 11 can be driven to move in a straight line toward the curved diaphragm 16.

[0051] The working method of the variable nozzle in this embodiment is as follows: the liquid inflow channel inside the nozzle body 1 is connected to the main liquid pipeline of the liquid supply system. The liquid supply system can adopt existing technology, and its specific structure will not be described in detail here. The air inlet 7 is connected to the air supply system through the gas pipeline. The air supply system can adopt existing technology, and will not be described in detail here.

[0052] When the liquid supply system is working, the liquid enters the annular inlet channel 1-1. The liquid enters the internal space of the cavity 15 through the through hole 6-1 on the cavity part 15 of the liquid flow chamber 6. The coil 10 is energized, and the electromagnet core 9 attracts the valve core 11. The valve core 11 cannot apply pressure to the curved diaphragm 16. At this time, under the action of liquid pressure, the curved diaphragm 16 bulges towards the valve core 11 and cannot block the liquid channel 6-2. Therefore, the liquid enters the outlet channel 1-2 through the liquid channel 6-2, and then enters the liquid outflow channel and is sprayed out through the liquid outflow channel.

[0053] When the variable nozzle needs to be closed, the coil 10 is de-energized. Under the elastic force of the spring 12, the valve core 11 moves toward the curved diaphragm 16, applying pressure to the curved diaphragm 16, causing it to deform and bulge toward the liquid outlet channel 6-2, thus blocking the liquid outlet channel 6-2 and closing the variable nozzle. When closed, gas at a set pressure is introduced into the limiting sleeve 13 through the air inlet 7. The elastic force of the spring 12 and the pressure of the gas act together on the curved diaphragm 16, causing it to move and block the liquid outlet channel 6-2.

[0054] The opening and closing of the liquid path within the variable displacement nozzle is achieved through the combined action of spring force, electromagnetic force, and pneumatic pressure. The pneumatic system provides a continuous pressure-holding system, the magnitude of which can be actively adjusted according to changes in the liquid path pressure, maintaining a constant pressure difference between the two (this design allows for a wider adjustable pressure range in the liquid path without affecting the accuracy and stability of the liquid flow control). The logical relationship between the four forces—spring force, electromagnetic force, pneumatic pressure, and liquid path pressure—is as follows: When the variable displacement nozzle is open: electromagnetic force > spring force and liquid path pressure > pneumatic pressure; when the variable displacement nozzle is closed: pneumatic pressure + spring force > liquid path pressure.

[0055] When the variable nozzle of this embodiment needs the valve core 11 to move toward the curved diaphragm 16 to block the liquid channel 6-2, the curved diaphragm 16 can be driven to move by the air pressure inside the spring 12 and the limiting sleeve 13. This optimizes the elastic force of the spring 12, avoids the need for a large elastic force in the spring 12, and reduces the requirements for the spring 12. At the same time, the gas inside the limiting sleeve 13 can play a damping role, which can effectively alleviate the reciprocating vibration phenomenon of the spring 12 and increase the flow control accuracy and stability of the variable nozzle.

[0056] In this embodiment, high-frequency rapid on / off switching of the variable nozzle can be achieved through gas-electric coordinated control, which can also achieve rapid on / off switching of the liquid circuit. The nozzle spray volume can be changed by controlling the on / off time ratio and on / off frequency.

[0057] Example 2 This example provides a spraying device equipped with the gas-electric coordinated control variable nozzle described in Example 1. The remaining structure of the spraying device can be achieved using existing technology and will not be described in detail here.

[0058] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A gas-electric co-controlled variable nozzle, characterized in that, The device includes a nozzle body with an annular inlet channel inside. An outlet channel is located inside the inlet channel, and an outlet portion of a liquid flow chamber extends into the outlet channel. The outlet portion connects to the cavity portion of the liquid flow chamber. The outlet portion has a liquid channel communicating with the cavity portion. The cavity portion has multiple through holes to connect the inlet channel and the internal space of the cavity portion. A diaphragm is provided at the inlet of the liquid channel. A liquid channel is located on one side of the diaphragm, and a valve core is located on the other side. The first end of the valve core extends into a limiting sleeve, and an elastic element is provided between the valve core and the limiting sleeve. The limiting sleeve is fixed inside the cavity portion. The valve core is slidably connected inside the valve core cavity, and an electromagnet core is located on the outer side of the second end of the valve core. A coil is provided around the outer periphery of the electromagnet core. The internal space of the limiting sleeve also communicates with an air inlet interface, which is connected to the valve core cavity for connecting to an air supply system.

2. The gas-electric coordinated control variable nozzle as described in claim 1, characterized in that, A connector is provided between the nozzle body and the liquid flow chamber, which fixes the liquid flow chamber and the nozzle body together.

3. The gas-electric coordinated control variable nozzle as described in claim 2, characterized in that, The connector uses a mounting nut. One end of the mounting nut is threaded to the nozzle body, and the other end is provided with an inner boss. The inner boss cooperates with the outer boss provided in the cavity of the liquid flow chamber. A sealing ring is provided between the inner end face of the cavity and the nozzle body.

4. The gas-electric coordinated control variable nozzle as described in claim 1, characterized in that, A sealing ring is provided between the liquid outlet and the liquid outlet channel.

5. A gas-electric co-controlled variable nozzle as described in claim 1, characterized in that, Multiple through holes are provided in the cavity section and are evenly distributed along the circumference of the cavity section.

6. A gas-electric co-controlled variable nozzle as described in claim 1, characterized in that, One end of the valve core cavity is located between the cavity portion and the limiting sleeve and is threadedly connected to the cavity portion. The portion of the valve core cavity located outside the cavity portion is provided with an air intake channel. The air intake end of the air intake channel is connected to an air intake interface. The first end of the valve core extends into the interior of the limiting sleeve through an opening provided in the limiting sleeve. The air intake channel communicates with the limiting sleeve through the gap between the valve core and the inner side of the opening. Furthermore, a sealing ring is provided between the air intake interface and the outer side of the valve core cavity. Furthermore, a sealing ring is provided between the cavity portion and the valve core cavity.

7. A gas-electric co-controlled variable nozzle as described in claim 1, characterized in that, The valve core located outside the limiting sleeve has a shoulder structure, which can contact the limiting sleeve to limit the movement of the valve core toward the diaphragm.

8. A gas-electric co-controlled variable nozzle as described in claim 1, characterized in that, The elastic element is a spring, which is sleeved on the outer periphery of the first end of the valve core. One end of the spring is connected to the inner side of the limiting sleeve, and the other end is embedded in the annular groove opened at the first end of the valve core.

9. A gas-electric co-controlled variable nozzle as described in claim 1, characterized in that, A sealing ring is provided between the electromagnet core and the valve core cavity.

10. A spraying device, characterized in that, The device is equipped with a gas-electric co-controlled variable nozzle as described in any one of claims 1-9.

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