A nozzle based on multi-cavity combined reflux feedback regulation

Abstract

The present invention discloses a nozzle based on multi-cavity combined reflux feedback regulation, which belongs to the field of nozzle technology. It includes a first mixing chamber, a first reflux diffusion chamber and a second mixing chamber connected in sequence; the first mixing chamber is provided with a liquid inlet hole and an air inlet hole, and the air inlet hole and the liquid inlet hole are provided with an air inlet pipe and a liquid inlet pipe respectively; the two ends of the first reflux diffusion chamber are provided with a mixing feed hole and a mixing discharge hole respectively, and a main channel and a reflux channel are provided between the mixing feed hole and the mixing discharge hole, and the two ends of the main channel are aligned with the mixing feed hole and the mixing discharge hole, and the two are connected, the reflux channels are symmetrically arranged on both sides of the main channel, and the reflux channels connect the head and tail of the main channel, one end of the second mixing chamber is connected to the first reflux diffusion chamber, and the other end is provided with a spray pipe. This technical solution is used to solve the problem that the contact and collision effect of air and liquid in the nozzle in the prior art is poor, which affects the atomization effect of the nozzle.

Description

Technical Field

[0001] The present invention belongs to the technical field of nozzles, and in particular relates to a nozzle based on multi-cavity combined reflux feedback regulation. Background Art

[0002] As a spraying device, the nozzle sets a predetermined pressure for the liquid and gas so that the gas and liquid are fully mixed in the mixing chamber. At the same time, the high-speed gas and the low-speed liquid come into contact with each other, oscillate and collide, causing the liquid to break into fine droplets, which are finally sprayed out in the form of water mist.

[0003] The nozzle in the prior art, such as a dual-fluid multi-stage atomizing nozzle with application number CN201920260142.X, includes a liquid cap, an atomizing core, a liquid core and an air cap, wherein the liquid cap is provided with an air inlet and an air storage chamber, and the air inlet is connected to the air storage chamber, a mixing chamber is provided in the atomizing core, a gas guide chamber is provided between the mixing chamber and the air storage chamber, a liquid flow channel is provided in the liquid core and the liquid flow channel is connected to the mixing chamber, an atomizing chamber is provided in the air cap, a cyclone is provided in the connecting port between the atomizing chamber and the mixing chamber on the atomizing core, the air cap is connected to a striker in the atomizing chamber, a resonator is nested on the outside of the striker, and a resonator is evenly opened in the resonator. In the actual use of the above scheme, the air intake and liquid intake of the nozzle enter the mixing chamber almost in one direction, and the gas carries the liquid into the next component, which will cause the agitation and collision of the gas and liquid in the mixing chamber to be poor, which will eventually lead to poor atomization effect of the nozzle. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a nozzle based on multi-cavity combined reflux feedback regulation to solve the problem of poor contact and collision effect between air and liquid in the nozzle in the prior art, which affects the atomization effect of the nozzle.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The nozzle of the present invention is based on multi-cavity combined reflux feedback regulation, comprising a first mixing chamber, a first reflux diffusion chamber and a second mixing chamber connected in sequence; a liquid inlet hole and an air inlet hole are provided on the first mixing chamber, and an air inlet pipe and a liquid inlet pipe are provided on the air inlet hole and the liquid inlet hole respectively; a mixing feed hole and a mixing discharge hole are provided on both ends of the first reflux diffusion chamber respectively, a main channel and a reflux channel are provided between the mixing feed hole and the mixing discharge hole, the two ends of the main channel are aligned with the mixing feed hole and the mixing discharge hole, and the two are connected, the reflux channels are symmetrically arranged on both sides of the main channel, and the reflux channels connect the beginning and end of the main channel, one end of the second mixing chamber is connected to the first reflux diffusion chamber, and a spray pipe is provided on the other end, and air inlet branches are symmetrically provided on both sides of the second mixing chamber, one end of the air inlet branch is connected to the interior of the second mixing chamber, and the other end of the air inlet branch is connected to the air inlet pipe.

[0007] The working principle of this technical solution is as follows:

[0008] The liquid and compressed gas entering the first mixing chamber are atomized for the first time through spray collision (collision forms small droplets), and then the mixed water vapor enters the first reflux diffusion chamber. Most of the gas entering the reflux diffusion chamber is discharged directly from the mixing discharge hole through the main channel, and a small part of the mixed water vapor returns to the mixing feed hole through the reflux channel, and then moves from the edge of the main channel toward the mixing discharge hole. During the movement, it will affect the path of most of the gas discharged directly from the main channel. It can be understood as: when the radial flow sweeps near one side of the chamber, part of the fluid is guided back to the inlet along the reflux channel, and this part of the fluid enters the middle of the chamber and then circulates The ring separates the bubbles, and as the bubbles grow, they will push the jet back in the direction of the other return flow channel. In this cycle, the spray (fluid) entering the second mixing chamber will present a state of intermittent up and down sweeping. Therefore, the air intake branch is set to impact and collide in the opposite direction of the sweeping spray movement. When the spray sweeps upward, it collides with the compressed gas and utilizes the kinetic energy of the spray. When it sweeps downward, it collides with the compressed gas and utilizes the kinetic energy of the spray and the gravitational potential energy. Therefore, during the collision process, the degree of collision will be more violent, which can greatly improve the crushing effect of the compressed gas on the liquid, thereby improving the atomization effect of the nozzle.

[0009] Furthermore, a conical blocking member is provided inside the first mixing chamber, and the smaller end of the blocking member is connected to the mixing feed hole. The benefit is that by providing the conical blocking member, not only the collision effect of gas and liquid can be improved, but also the flow path of the gas-liquid mixture can be reduced, thereby increasing the flow rate.

[0010] Furthermore, the first reflux diffusion chamber comprises a symmetrically arranged semi-cylindrical body, and the mixing feed hole, mixing discharge hole, main channel and reflux channel are all recessed on the inner side surface of the single semi-cylindrical body.

[0011] Furthermore, the end of the air intake branch pipe connected to the second mixing chamber is tilted, and the extension direction of the one end of the air intake branch pipe is set at an acute angle to the discharge direction of the mixing discharge hole. The advantage of this is that the tilted setting can well make the direction of the compressed gas located above and behind the spray scanning direction, and then use the kinetic energy of the spray in the vertical direction to participate in the collision with the compressed gas without affecting the horizontal movement kinetic energy of the spray.

[0012] Furthermore, a pulse valve is provided on the air intake branch pipe, which has the advantage that the pulsed intermittent impact can match the compressed air entering the air intake branch pipe with the direction and timing of the spray sweep.

[0013] Furthermore, a second reflux diffusion chamber is provided on the end of the spray pipe and is connected thereto. The structure of the second reflux diffusion chamber is the same as that of the first reflux diffusion chamber. The benefit is that the setting of the second reflux mechanism enables the spray at the nozzle outlet to perform intermittent sweeping operation, which not only increases the coverage range of the nozzle, but can also be well used in industries such as irrigation and moisturizing.

[0014] Furthermore, one end of the second reflux diffusion chamber is rotatably connected to the end of the spray pipe, and a rotating blade is provided at the rotatably connected portion between the second reflux diffusion chamber and the spray pipe. A blow pipe is provided on the outside of the rotating blade, one end of the blow pipe is connected to the air inlet branch pipe, and the other end of the blow pipe is tilted to point toward the rotating blade. The benefit is that the second reflux diffusion chamber is blown and rotated by the airflow, so that when in use, the coverage in the circumferential direction can be expanded instead of only increasing the coverage in the spray sweeping direction.

[0015] Furthermore, a control valve is provided on the blowpipe.

[0016] Furthermore, the second reflux diffusion chamber is rotatably connected to the end of the spray pipe through a sleeve, and one end of the sleeve is fixedly connected to the end of the second reflux diffusion chamber, and the sleeve is communicated with the interior of the second reflux diffusion chamber.

[0017] Furthermore, the mixing discharge hole of the first reflux diffusion chamber is trumpet-shaped, which is beneficial in that it improves the spraying effect of the spray.

[0018] The beneficial effects of the present invention are:

[0019] (1) The setting of the first reflux diffusion chamber allows the spray to utilize the kinetic energy of the spray when it collides with the compressed gas when it sweeps upward, and utilize the kinetic energy of the spray and the gravitational potential energy when it collides with the compressed gas when it sweeps downward. Therefore, during the collision process, the degree of collision will be more violent, which can greatly improve the crushing effect of the compressed gas on the liquid, thereby improving the atomization effect of the nozzle; (2) The setting of the second reflux diffusion chamber allows the spray direction of the nozzle to be in a sweeping state, which not only improves the spray coverage of the nozzle, but also makes the nozzle suitable for intermittent working scenarios, such as irrigation and moisturizing industries; (3) The setting of the blowpipe and rotating blades can make the second reflux diffusion chamber rotate, which improves the overall coverage of the nozzle in the circumferential direction.

[0020] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, the present invention provides the following drawings for illustration:

[0022] Figure 1 This is a three-dimensional schematic diagram of the nozzle of the present invention installed in the housing;

[0023] Figure 2 This is a three-dimensional schematic diagram of the nozzle of the present invention installed in the housing;

[0024] Figure 3 This is a three-dimensional schematic diagram of the nozzle of the present invention installed in the housing;

[0025] Figure 4 This is a three-dimensional schematic diagram of the nozzle of the present invention installed in the housing;

[0026] Figure 5 This is a three-dimensional schematic diagram of the nozzle of the present invention installed in the housing;

[0027] Figure 6 A three-dimensional schematic diagram of the nozzle of the present invention;

[0028] Figure 7 It is a schematic front view of the nozzle of the present invention;

[0029] Figure 8 It is a schematic cross-sectional view of the front view of the present invention;

[0030] Figure 9 A three-dimensional schematic diagram of a conical blocking member of the present invention;

[0031] Figure 10Schematic diagram of a first reflux diffusion chamber of the present invention in which a main flow channel and a reflux channel are arranged in a semicircular main body;

[0032] Figure 11 Schematic diagram of reflux and diffusion simulation of the reflux diffusion chamber in the present invention.

[0033] The reference numerals are as follows:

[0034] First mixing chamber 1, first reflux diffusion chamber 2, second mixing chamber 3, spray tube 4, second reflux diffusion chamber 5, air inlet hole 6, air inlet pipe 7, liquid inlet pipe 8, liquid inlet hole 9, blocking member 10, main channel 11, reflux channel 12, air inlet branch pipe 13, mixed feed hole 14, mixed discharge hole 15, blowpipe 16, pulse valve 17, rotating blade 18, cylindrical body 19, upper shell 20, lower shell 21, connecting ear plate 22, bolt 23, retaining ring 24. DETAILED DESCRIPTION

[0035] like Figures 6 to 11 As shown, the present invention is a nozzle based on multi-cavity combined reflux feedback regulation, comprising a first mixing chamber 1, a first reflux diffusion chamber 2 and a second mixing chamber 3 connected in sequence; the first mixing chamber 1 is provided with a liquid inlet hole 9 and an air inlet hole 6, and the air inlet hole 6 and the liquid inlet hole 9 are provided with an air inlet pipe 7 and a liquid inlet pipe 8 respectively; the two ends of the first reflux diffusion chamber 2 are provided with a mixing feed hole 14 and a mixing discharge hole 15 respectively, and a main channel 11 and a reflux channel 12 are provided between the mixing feed hole 14 and the mixing discharge hole 15. Both ends of the flow channel 11 are aligned with the mixing feed hole 14 and the mixing discharge hole 15, and the two are connected. The return channel 12 is symmetrically arranged on both sides of the main channel 11, and the return channel 12 connects the head and tail of the main channel 11. One end of the second mixing chamber 3 is connected to the first reflux diffusion chamber 2, and the other end is provided with a spray tube 4. Intake branches 13 are symmetrically provided on both side surfaces of the second mixing chamber 3, one end of the intake branch 13 is connected to the interior of the second mixing chamber 3, and the other end of the intake branch 13 is connected to the intake pipe 7.

[0036] The working principle of this technical solution is as follows:

[0037] like Figure 11As shown, the liquid and compressed gas entering the first mixing chamber 1 are atomized for the first time through the collision, and then the mixed water vapor enters the first reflux diffusion chamber 2. Most of the gas entering the reflux diffusion chamber is discharged directly from the mixing discharge hole 15 through the main channel 11, and a small part of the mixed water vapor returns to the mixing feed hole 14 through the reflux channel 12, and then moves from the edge of the main channel 11 toward the mixing discharge hole 15. During the movement, it will affect the path of most of the gas directly discharged from the main channel 11. It can be understood that when the radial flow sweeps near one side of the chamber, part of the fluid is guided back to the inlet along the reflux channel 12, and this part of the fluid enters the chamber. After a period of recirculation, the bubbles are separated. As the bubbles grow, the jet is pushed back in the direction of the other return channel 12. In this cycle, the spray (fluid) entering the second mixing chamber will present a state of intermittent up and down sweeping. Therefore, the air intake branch 13 is set to impact and collide in the opposite direction of the sweeping spray movement. When the spray is swept upward, the collision with the compressed gas utilizes the kinetic energy of the spray. When it is swept downward, the collision with the compressed gas utilizes the kinetic energy of the spray and the gravitational potential energy. Therefore, during the collision process, the degree of collision will be more violent, which can greatly improve the crushing effect of the compressed gas on the liquid, thereby improving the atomization effect of the nozzle.

[0038] The principle that needs further explanation is that the intensity of the collision also depends on the collision angle and collision kinetic energy. Therefore, the movement direction of the gas in this nozzle collides with the upward or downward kinetic energy direction of the liquid at a certain angle, but it is not a head-on collision. This can increase the intensity of the collision without causing a significant impact on the initial horizontal movement kinetic energy of the droplet.

[0039] The interior of the first mixing chamber 1 is provided with a conical barrier 10, the smaller end of which is connected to the mixing feed hole 14. The conical barrier 10 not only enhances the gas-liquid collision effect but also reduces the flow path of the gas-liquid mixture, thereby increasing the flow rate. The first reflux diffusion chamber 2 includes a symmetrically arranged semi-cylindrical body 19. The mixing feed hole 14, mixing discharge hole 15, main channel 11, and reflux channel 12 are all recessed on the inner side of a single semi-cylindrical body 19.

[0040] One end of the air intake branch pipe 13 connected to the second mixing chamber 3 is tilted, and the extension direction of this end of the air intake branch pipe 13 is set at an acute angle to the discharge direction of the mixing discharge hole 15. The tilted setting can well make the direction of the compressed gas located above and behind the spray sweeping direction, and then utilize the kinetic energy of the spray in the vertical direction to participate in the collision with the compressed gas without affecting the horizontal movement kinetic energy of the spray.

[0041] The air intake branch pipe 13 is provided with a pulse valve 17, which performs pulsed intermittent impact so that the compressed air entering the air intake branch pipe 13 can match the direction and timing of the spray sweep.

[0042] A second reflux diffusion chamber 5 is provided at the end of the spray tube 4 and is connected thereto. The second reflux diffusion chamber 5 has the same structure as the first reflux diffusion chamber 2. The setting of the second reflux mechanism enables the spray at the nozzle outlet to perform intermittent sweeping operation, which not only increases the coverage range of the nozzle, but also can be well used in industries such as irrigation and moisturizing. For example, when moisturizing certain substances, such as tobacco, they need to be transferred after one humidification, and the transfer can be carried out by utilizing the gaps between intermittent spraying humidification.

[0043] One end of the second reflux diffusion chamber 5 is rotatably connected to the end of the spray pipe 4, and a rotating blade 18 is provided at the rotatably connected portion between the second reflux diffusion chamber 5 and the spray pipe 4. A blow pipe 16 is provided on the outside of the rotating blade 18. One end of the blow pipe 16 is connected to the air inlet branch pipe 13, and the other end of the blow pipe 16 is tilted toward the rotating blade 18. The second reflux diffusion chamber 5 is blown and rotated by the airflow, so that when in use, the coverage in the circumferential direction can be expanded, rather than only increasing the coverage in the spray sweeping direction. Preferably, a control valve is provided on the blow pipe 16. It should be noted that the control valve is used to control the opening and closing, and to control whether the nozzle needs to be used in a rotary spraying environment.

[0044] The second reflux diffusion chamber 5 is rotatably connected to the end of the spray tube 4 via a sleeve, one end of which is fixedly connected to the end of the second reflux diffusion chamber 5 and communicates with the interior of the second reflux diffusion chamber 5. The mixing discharge hole of the first reflux diffusion chamber 2 is trumpet-shaped to enhance the spraying effect. It should be noted that the rotating connection of the sleeve is a prior art. In this solution, the various connecting components can be connected by bolts. At the same time, sealing components such as sealing rings should be provided at the connection points. Again, no further details are given.

[0045] like Figure 1-Figure 5 As shown, it should be noted that, in the present technical solution, a shell can also be provided on the outside of the nozzle to facilitate the installation, use and matching of the nozzle in a specific position, and to enhance the integrated performance of the nozzle, making the structure look more compact; the specific shell includes an upper shell 20 and a lower shell 21, and the upper shell 20 and the lower shell 21 are connected by bolts 23, and a connecting ear plate 22 for fixing the nozzle to a specified position and a component is also provided on the outside of the shell.

[0046] The nozzle in the present technical solution is limited and fixed inside the shell. To be more specific, the interiors of the upper shell 20 and the lower shell 24 are hollow, and are spliced to form a shell in a rectangular or cylindrical shape. A through hole is provided on the shell to facilitate the extension of the second reflux diffusion chamber 5, the air inlet pipe 7, the liquid inlet pipe 8 and the air inlet branch pipe 13. Preferably, a retaining ring 24 is provided on the outer side of the second reflux diffusion chamber 5. The retaining ring 24 is used to limit the position of the second reflux diffusion chamber 5 extending out of the through hole, which is convenient for positioning during installation. Under the action of the upper shell 20 and the lower shell 21, the nozzle can be limited and fixed in the shell. At the same time, a connector is provided on the part of the liquid inlet pipe 8, the air inlet pipe 7 and the air inlet branch pipe 13 located outside the shell to facilitate connection with the external liquid infusion pipe and air infusion pipe.

[0047] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A nozzle based on multi-cavity combined reflux feedback regulation, characterized by: The invention comprises a first mixing chamber, a first reflux diffusion chamber and a second mixing chamber connected in sequence; a liquid inlet hole and an air inlet hole are provided on the first mixing chamber, and an air inlet pipe and a liquid inlet pipe are provided on the air inlet hole and the liquid inlet hole respectively; a mixing feed hole and a mixing discharge hole are provided on both ends of the first reflux diffusion chamber respectively, a main channel and a reflux channel are provided between the mixing feed hole and the mixing discharge hole, the two ends of the main channel are aligned with the mixing feed hole and the mixing discharge hole, and the two are connected, the reflux channels are symmetrically arranged on both sides of the main channel, and the reflux channels connect the end to the end of the main channel, one end of the second mixing chamber is connected to the first reflux diffusion chamber, and the other end is provided with a spray pipe, and air inlet branches are symmetrically provided on both sides of the second mixing chamber, one end of the air inlet branch is connected to the interior of the second mixing chamber, and the other end of the air inlet branch is connected to the air inlet pipe; A second reflux diffusion chamber is provided at the end of the spray pipe and is in communication therewith. The second reflux diffusion chamber has the same structure as the first reflux diffusion chamber. One end of the second reflux diffusion chamber is rotatably connected to the end of the spray pipe, and a rotating blade is provided at the rotatably connected portion between the second reflux diffusion chamber and the spray pipe. A blowpipe is provided on the outer side of the rotating blade, one end of the blowpipe is in communication with the air inlet branch pipe, and the other end of the blowpipe is inclined toward the rotating blade. The blowpipe is provided with a control valve; the second reflux diffusion chamber is rotatably connected to the end of the spray pipe through a sleeve, and one end of the sleeve is fixedly connected to the end of the second reflux diffusion chamber, and the sleeve is communicated with the interior of the second reflux diffusion chamber.

2. The nozzle based on multi-cavity combined reflux feedback regulation according to claim 1, characterized in that: A conical blocking member is provided inside the first mixing chamber, and the smaller end of the blocking member is communicated with the mixing feed hole.

3. The nozzle based on multi-cavity combined reflux feedback regulation according to claim 1, characterized in that: The first reflux diffusion chamber comprises a symmetrically arranged semi-cylindrical main body, and the mixing feed hole, mixing discharge hole, main channel and reflux channel are all recessed on the inner side surface of the single semi-cylindrical main body.

4. The nozzle based on multi-cavity combined reflux feedback regulation according to claim 1, characterized in that: One end of the air intake branch pipe connected to the second mixing chamber is arranged at an angle, and the extending direction of the one end of the air intake branch pipe forms an acute angle with the discharge direction of the mixing discharge hole.

5. The nozzle based on multi-cavity combined reflux feedback regulation according to claim 1, characterized in that: The air intake branch pipe is provided with a pulse valve.

6. The nozzle based on multi-cavity combined reflux feedback regulation according to claim 1, characterized in that: The mixing discharge hole of the first reflux diffusion chamber is trumpet-shaped.

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