Automatic adjusting device for double-medium atomizing nozzle of charging machine

Abstract

The utility model relates to the technical field of tobacco processing, in particular to an automatic adjusting device for a double-medium atomizing nozzle of a charging machine. The automatic adjusting device for the double-medium atomizing nozzle of the charging machine comprises a liquid cavity, a gas cavity and a nozzle connecting piece, the liquid cavity and the gas cavity are connected through a connecting assembly, a gas cavity auxiliary piece is arranged on the gas cavity, and a liquid cavity auxiliary piece is arranged on the liquid cavity; the nozzle connecting piece is mounted at a charging hole of the charging machine; the control unit comprises a needle valve motor connected with a needle valve, and a conical valve motor connected with a conical valve; the adjusting unit comprises a conical valve and a needle valve, the conical valve is connected with the needle valve, the interior of the conical valve is communicated with the needle valve, and the conical valve is connected with the liquid cavity; in the feeding process of the feeding machine, feed liquid enters the liquid cavity through the liquid cavity auxiliary part and enters a cavity composed of the conical valve and the needle valve through the small holes in the side wall of the conical valve, and when the feed liquid flows through the tip end of the conical valve, friction is generated between high-pressure gas entering through the gas cavity auxiliary part and the feed liquid, so that atomization is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of tobacco processing, in particular to an automatic regulating device for a dual-medium atomizing nozzle of a feeder. Background Art

[0002] During the tobacco production process of cigarette manufacturers, the prepared sugar material needs to be atomized using high-pressure compressed air or steam during the adding stage and applied to the corresponding tobacco leaves.

[0003] Nozzles can be divided into mechanical atomizing nozzles and dual-media atomizing nozzles according to their structural characteristics and atomization methods. Mechanical atomizing nozzles use the pressure of the liquid itself to spray or atomize the liquid; dual-media atomizing nozzles use the friction between the high-speed jet medium (steam or air) and the liquid to atomize the liquid.

[0004] During the tobacco shred process, viscous liquids such as prepared sugars and flavorings are atomized using high-pressure compressed air or steam and then applied to the corresponding tobacco leaves and cut tobacco. Adding flavoring to tobacco leaves improves their sensory quality and physical properties, while flavoring cut tobacco supplements, enhances, or improves the aroma of the tobacco. Nozzles are crucial components for atomizing the liquid during the tobacco shred process. Their performance directly determines the droplet diameter and flow rate fluctuations of the atomized liquid, ultimately determining the effectiveness of the flavoring and addition process.

[0005] Currently, dual-media atomizing nozzles are widely used to atomize the feed liquid during tobacco shred feeding and flavoring. Existing dual-media atomizing nozzles eject liquid directly through a liquid chamber and gas directly through a gas chamber. These nozzles cannot adjust the atomization angle or droplet diameter, making it impossible to control the tobacco material's absorption of the feed liquid. During installation, maintenance personnel often need to manually adjust the nozzle's cone valve and needle valve to control the droplet size at the nozzle's outlet. This manual adjustment often relies on the repairman's personal experience and multiple adjustments. Utility Model Content

[0006] The purpose of the utility model is to provide an automatic adjustment device for the dual-media atomizing nozzle of a feeding machine, which realizes the uniformity of the dual-media atomizing nozzle in use and the instant and accurate adjustment during the installation and application process, improves the uniformity of the dual-media atomizing nozzle in the feeding process, reduces the reliance on experience judgment in the installation of the dual-media atomizing nozzle, reduces the manual debugging in troubleshooting and regular maintenance, and ensures the stability of the tobacco processing process and the comprehensive quality of the product.

[0007] The utility model provides an automatic adjustment device for a dual-medium atomizing nozzle of a feeder, comprising a nozzle cavity unit, an adjustment unit and a control unit;

[0008] The nozzle cavity unit includes a liquid cavity, a gas cavity and a nozzle connector, wherein the liquid cavity and the gas cavity are connected via a connector assembly, a gas cavity auxiliary component is provided on the gas cavity, and a liquid cavity auxiliary component is provided on the liquid cavity;

[0009] The liquid chamber auxiliary component is externally connected to the sugar material pipeline, the gas chamber auxiliary component is externally connected to the steam pipeline, and the nozzle connector is installed at the feeding port of the feeding machine;

[0010] The regulating unit includes a conical valve and a needle valve, the conical valve is connected to the needle valve, the interior of the conical valve is communicated with the needle valve, and the conical valve is connected to the liquid chamber;

[0011] During the feeding process of the feeder, the liquid enters the liquid chamber through the liquid chamber auxiliary component, and enters the cavity composed of the cone valve and the needle valve through the small hole on the side wall of the cone valve. When the liquid flows through the tip of the cone valve, the high-pressure gas entering through the gas chamber auxiliary component generates friction with the liquid.

[0012] The control unit includes a needle valve motor and a cone valve motor. The needle valve motor is connected to the needle valve, and the cone valve motor is connected to the cone valve.

[0013] Preferably, the regulating unit further includes a third sealing ring, and the cavity formed by the conical valve and the needle valve is sealed on one side by the third sealing ring.

[0014] Preferably, the nozzle cavity unit further includes a gland and a first sealing ring;

[0015] The interior of the connecting assembly is threadedly connected to the gland, and the connecting assembly and the conical valve are sealed by the gland and the first sealing ring to separate the gas cavity and the liquid cavity.

[0016] Preferably, the nozzle cavity unit further includes a second sealing ring;

[0017] The second sealing ring is installed between the liquid chamber and the conical valve.

[0018] Preferably, the control unit further comprises a needle valve motor fixing bracket and a needle valve motor slide rail;

[0019] The needle valve motor fixing bracket is installed on the bracket of the feeder, and the needle valve motor moves on the needle valve motor fixing bracket through the needle valve motor slide rail.

[0020] Further preferably, the control unit further includes a conical valve transmission gear and a motor transmission gear;

[0021] The cone valve motor controls the movement of the cone valve transmission gear by controlling the rotation of the motor transmission gear.

[0022] Further preferably, the control unit further comprises a screw rod, a square rod, a screw rod transmission gear and a screw rod nut assembly;

[0023] The square rod is mounted on a frame of the feeder, the screw nut assembly slides relatively with the square rod, and the screw transmission gear drives the screw to rotate.

[0024] Preferably, the liquid chamber and the gas chamber are respectively connected to two sides of the connecting assembly by threads.

[0025] Preferably, the conical valve is threadedly connected to the needle valve, and the conical valve is threadedly connected to the liquid chamber.

[0026] Preferably, a liquid acceleration channel is provided on the surface of the needle valve, and the liquid acceleration channel is spiral.

[0027] Beneficial effects:

[0028] The technical solution of this utility model is that during the feeding process of the feeder, the feed liquid enters the liquid chamber through the liquid chamber auxiliary component, and then enters the cavity composed of the conical valve and needle valve through the small hole in the side wall of the conical valve. As the feed liquid flows through the tip of the conical valve, the high-pressure gas entering through the gas chamber auxiliary component creates friction with the feed liquid, causing atomization. At this time, the control unit adjusts the relative position of the needle valve and the nozzle chamber unit to adjust the atomization angle and the diameter of the atomized particles. The relative position of the conical valve and the needle valve is then adjusted to change the angle and pressure of the high-pressure gas ejection, thereby adjusting the injection angle of the atomized feed liquid and the diameter of the atomized particles.

[0029] The device makes the adjustment of the dual-media atomizing nozzle more accurate and timely. By improving the composition of the dual-media atomizing nozzle to increase the uniformity of the liquid spraying, adding an adjustment unit and a control unit for the dual-media atomizing nozzle, the uniformity of the dual-media atomizing nozzle in use and the instant and accurate adjustment during installation and application are achieved, the uniformity of the dual-media atomizing nozzle in the feeding process is improved, the reliance on experience judgment in the installation of the dual-media atomizing nozzle is reduced, and the manual debugging in troubleshooting and regular maintenance is reduced, thereby ensuring the stability of the tobacco processing process and the overall quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 This is a schematic diagram of the overall structure of the device of the utility model;

[0032] Figure 2 This is a cross-sectional view of the dual-media atomizing nozzle in the present utility model;

[0033] Figure 3 This is an enlarged structural diagram of the needle valve portion of the control unit in the present utility model;

[0034] Figure 4 This is an enlarged structural diagram of the conical valve portion of the control unit in the present utility model;

[0035] Figure 5 This is an enlarged view of the structure of the needle valve in the utility model;

[0036] Figure 6 This is an enlarged view of the structure of the cone valve in the utility model;

[0037] Figure 7 This is an enlarged view of the structure of the connecting component in the present utility model.

[0038] Description of reference numerals:

[0039] 1: Gas chamber auxiliary part; 2: Nozzle connecting part; 3: Gas chamber; 4: Connecting assembly; 5: Liquid chamber auxiliary part; 6: Liquid chamber; 7: Conical valve; 8: Needle valve; 9: Needle valve motor; 10: Needle valve motor fixing bracket; 11: Needle valve motor slide rail; 12: Conical valve transmission gear; 13: Motor transmission gear; 14: Screw transmission gear; 15: Screw nut assembly; 16: Square rod; 17: Screw; 18: Conical valve motor; 19: First sealing ring; 20: Pressure cover; 21: Second sealing ring; 22: Third sealing ring. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0043] like Figures 1 to 7 As shown, the present invention provides an automatic adjustment device for a dual-media atomizing nozzle of a feeder, comprising a nozzle cavity unit, an adjustment unit, and a control unit. The nozzle cavity unit comprises a liquid cavity 6, a gas cavity 3, and a nozzle connector 2. The liquid cavity 6 and gas cavity 3 are connected by a connecting assembly 4. The gas cavity 3 is provided with a gas cavity auxiliary component 1, and the liquid cavity 6 is provided with a liquid cavity auxiliary component 5. The liquid cavity auxiliary component 5 is externally connected to the sugar material pipeline, and the gas cavity auxiliary component 1 is externally connected to the steam pipeline. The nozzle connector 2 is installed at the feeder's feed port. The adjustment unit comprises a conical valve 7 and a needle valve 8. The conical valve 7 is connected to the needle valve 8, and the interior of the conical valve 7 is in communication with the needle valve 8. The conical valve 7 is connected to the liquid cavity 6. During the feeding process of the feeder, the feed enters the liquid cavity 6 through the liquid cavity auxiliary component 5, and then enters the cavity formed by the conical valve 7 and the needle valve 8 through the small hole in the side wall of the conical valve 7. As the feed flows through the tip of the conical valve 7, the high-pressure gas entering through the gas cavity auxiliary component 1 generates friction with the feed. The control unit includes a needle valve motor 9 and a cone valve motor 18 . The needle valve motor 9 is connected to the needle valve 8 , and the cone valve motor 18 is connected to the cone valve 7 .

[0044] During the feeding process of the feeder, the present invention's technical solution allows the liquid to enter the liquid chamber 6 through the liquid chamber auxiliary component 5, and then enter the cavity formed by the conical valve 7 and needle valve 8 through the small hole on the side wall of the conical valve 7. As the liquid flows through the tip of the conical valve 7, the high-pressure gas entering through the gas chamber auxiliary component 1 creates friction with the liquid, causing atomization. At this point, the control unit adjusts the relative position of the needle valve 8 and the nozzle chamber unit to adjust the atomization angle and the diameter of the atomized particles. Furthermore, the relative position of the conical valve 7 and the needle valve 8 is adjusted to change the angle and pressure of the high-pressure gas ejection, thereby adjusting the spray angle of the atomized liquid and the diameter of the atomized particles.

[0045] like Figure 2 As shown, the adjustment unit also includes a third sealing ring 22, which seals the cavity formed by the conical valve 7 and the needle valve 8 on one side. The nozzle chamber unit also includes a gland 20 and a first sealing ring 19. The interior of the connecting assembly 4 is threadedly connected to the gland 20. The gland 20 and the first sealing ring 19 seal the connecting assembly 4 and the conical valve 7, separating the gas chamber 3 from the liquid chamber 6. The nozzle chamber unit also includes a second sealing ring 21, which is installed between the liquid chamber 6 and the conical valve 7.

[0046] Specifically, the nozzle chamber unit mainly includes a gas chamber auxiliary component 1, a nozzle connector 2, a gas chamber 3, a connecting assembly 4, a liquid chamber auxiliary component 5, a liquid chamber 6, a first sealing ring 19, a pressure cap 20, and a second sealing ring 21. The adjustment unit mainly includes a conical valve 7, a needle valve 8, and a third sealing ring 22. The nozzle connector 2 is connected to the feeder roller, the gas chamber 3 is threadedly connected to the gas chamber auxiliary 1, and the high-pressure gas enters the gas chamber 3 through the gas chamber auxiliary 15. The liquid chamber 6 is threadedly connected to the liquid chamber auxiliary 5. The liquid enters the liquid chamber 6 through the liquid chamber auxiliary 5 and enters the cavity formed by the conical valve 7 and the needle valve 8 through the opening on the side of the conical valve 7. The cavity formed by the conical valve 7 and the needle valve 8 is sealed on one side by the third sealing ring 22. The liquid chamber 6 and the gas chamber 3 are threadedly connected to the connecting component 4 on both sides. On the side where the connecting component 4 is threadedly connected to the liquid chamber 6, the inside of the connecting component 4 is also threadedly connected to the pressure cover 20. The connecting component 4 and the conical valve 7 are sealed by the first sealing ring 19 and the pressure cover 20, so that the liquid chamber 6 and the gas chamber 3 are completely separated. The liquid chamber 6 and the conical valve 7 are separated from the external environment by the action of the second sealing ring 21. The liquid chamber auxiliary 5 and the gas chamber auxiliary 1 are located in the same plane and opposite to each other. When the liquid feed passes through the dual-medium atomizing nozzle, the high-pressure gas rubs the liquid feed, causing it to be atomized into fine mist particles and evenly mixed with the gas, making the feeder more uniform and stable during the feeding process, ensuring the feeder's consistency during the feeding process and improving the overall quality of the tobacco products during the feeding process.

[0047] like Figure 3 and Figure 4 As shown, the control unit also includes a needle valve motor fixing bracket 10 and a needle valve motor slide 11. The needle valve motor fixing bracket 10 is mounted on the bracket of the feeder, and the needle valve motor 9 moves on the needle valve motor fixing bracket 10 via the needle valve motor slide 11. The control unit also includes a conical valve transmission gear 12 and a motor transmission gear 13. The conical valve motor 18 controls the movement of the conical valve transmission gear 12 by controlling the rotation of the motor transmission gear 13. The control unit also includes a screw 17, a square rod 16, a screw transmission gear 14, and a screw nut assembly 15. The square rod 16 is mounted on the frame of the feeder. The screw nut assembly 15 slides relative to the square rod 16, and the screw transmission gear 14 drives the screw 17 to rotate.

[0048] Specifically, the needle valve motor 9 is fixed to the tail of the needle valve 8 and keyed to the tail of the needle valve 8. Under program control, the relative position of the needle valve 8 is changed by controlling the rotation of the motor shaft of the needle valve motor 9. When the needle valve motor 9 rotates forward, the motor shaft controls the forward rotation of the needle valve 8. Under the action of the spiral, the distance between the needle valve 8 and the nozzle unit decreases, and the needle valve motor slide 11 moves forward with the motor. The needle valve motor fixing bracket 10 is fixed to the surface of the feeder frame, supporting the movement of the needle valve motor slide 11 during the operation of the needle valve motor 9. The cone valve motor 18 is key-connected to the motor transmission gear 13. During the operation of the cone valve motor 18, when the motor rotates forward, the motor transmission gear 13 rotates clockwise, driving the two sides of the motor transmission gear 13 to engage with the cone valve transmission gear 12 and the screw transmission gear 14 respectively, with a speed ratio of 1:1. As the cone valve transmission gear 12 rotates, the cone valve 7 is driven to rotate counterclockwise, increasing the distance between the cone valve 7 and the nozzle cavity. At the same time, in order to reduce the vibration influence of the motor during the movement of the cone valve 7, the screw transmission gear 14 rotates counterclockwise to drive the screw 17 to rotate counterclockwise, so that the screw nut assembly 15 and the cone valve motor 18 move parallel to each other, and the square rod 16 is fixed on the feeder frame. The screw nut assembly 15 and the square rod 16 slide relative to each other, indirectly controlling the position of the cone valve motor 18 to be stable and not offset, thereby achieving the purpose of reducing the movement error and evenly adjusting the relative position of the cone valve 7. During regular maintenance, dual-media atomizing nozzles require adjustment. Manual adjustment often relies on the operator's personal experience. Electric control improves the data and stability of dual-media atomizing nozzles during installation and adjustment. Electric control of dual-media atomizing nozzles ensures the sensitivity of the nozzle spray effect during use, reduces errors caused by operator adjustment habits, and improves the stability of the tobacco leaves and the overall quality of the product.

[0049] like Figure 5As shown, specifically, the needle valve 8 is primarily connected to the conical valve 7 via a thread, and the other end is connected to the needle valve motor 9 via a key. A third sealing ring 22 is located at the front end of the thread, sealing the cavity formed by the needle valve 8 and the conical valve 7. A spiral groove is located at the front end of the needle valve 8, i.e., a liquid acceleration channel is formed on the surface of the needle valve 8. As the liquid passes through the cavity, it generates a forward acceleration as it flows through the groove, and the shear force of the spiral groove increases the pressure and acceleration of the liquid as it passes through the cavity, enhancing the atomization effect of the dual-medium atomizing nozzle.

[0050] like Figure 6 As shown, specifically, the surface of the conical valve 7 mainly includes an external thread connected to the liquid chamber 6 and an internal thread connected to the needle valve 8. Inside the conical valve 7 and the liquid chamber 6, the conical valve 7 has an opening, and the liquid enters the conical valve 7 through the small hole. The front of the conical valve 7 is in an open cone shape. When the liquid is in the conical part, the volume of the cavity is reduced, which increases the pressure of the liquid, causing the liquid to accelerate again at the opening, thereby increasing the atomization effect of the dual-medium atomizing nozzle.

[0051] like Figure 7 As shown, specifically, to ensure the sealing of the outside of the conical valve 7, a second sealing ring 21 is provided between the conical valve 7 and the inner wall of the liquid chamber 6, and a first sealing ring 19 is provided between the conical valve 7 and the connecting assembly 4, ensuring that the independent cavities are directly connected to each other without gas or liquid leakage. The connecting assembly 4 is connected to multiple components through threads. The connecting assembly 4 can limit the distance that the conical valve 7 enters the gas chamber 3, thereby accurately adjusting the opening when the liquid is sprayed out in a conical manner. During maintenance and use, the threads must be lubricated in a timely manner and excess grease must be removed. At the part where the connecting assembly 4 enters the gas chamber 3, the high-pressure medium enters the outlet of the conical valve 7 through the side seam and contacts the liquid. During the entry process, an inward shear force is generated, thereby accelerating the high-speed liquid before contacting the liquid, making the ejection pressure greater.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic adjustment device for a dual-medium atomizing nozzle of a feeder, characterized in that: It includes a nozzle cavity unit, an adjustment unit and a control unit; The nozzle cavity unit includes a liquid cavity, a gas cavity and a nozzle connector, wherein the liquid cavity and the gas cavity are connected via a connector assembly, a gas cavity auxiliary component is provided on the gas cavity, and a liquid cavity auxiliary component is provided on the liquid cavity; The liquid chamber auxiliary component is externally connected to the sugar material pipeline, the gas chamber auxiliary component is externally connected to the steam pipeline, and the nozzle connector is installed at the feeding port of the feeding machine; The regulating unit includes a conical valve and a needle valve, the conical valve is connected to the needle valve, the interior of the conical valve is communicated with the needle valve, and the conical valve is connected to the liquid chamber; During the feeding process of the feeder, the liquid enters the liquid chamber through the liquid chamber auxiliary component, and enters the cavity composed of the cone valve and the needle valve through the small hole on the side wall of the cone valve. When the liquid flows through the tip of the cone valve, the high-pressure gas entering through the gas chamber auxiliary component generates friction with the liquid. The control unit includes a needle valve motor and a cone valve motor. The needle valve motor is connected to the needle valve, and the cone valve motor is connected to the cone valve.

2. The automatic adjustment device for the dual-medium atomizing nozzle of the feeder according to claim 1 is characterized in that: The regulating unit further includes a third sealing ring, and the cavity formed by the conical valve and the needle valve is sealed on one side by the third sealing ring.

3. The automatic adjustment device for the dual-medium atomizing nozzle of the feeder according to claim 1 is characterized in that: The nozzle cavity unit further includes a gland and a first sealing ring; The interior of the connecting assembly is threadedly connected to the gland, and the connecting assembly and the conical valve are sealed by the gland and the first sealing ring to separate the gas cavity and the liquid cavity.

4. The automatic adjustment device for the dual-medium atomizing nozzle of the feeder according to claim 1 is characterized in that: The nozzle cavity unit further includes a second sealing ring; The second sealing ring is installed between the liquid chamber and the conical valve.

5. The automatic adjustment device for the dual-medium atomizing nozzle of the feeder according to claim 1 is characterized in that: The control unit also includes a needle valve motor fixing bracket and a needle valve motor slide rail; The needle valve motor fixing bracket is installed on the bracket of the feeder, and the needle valve motor moves on the needle valve motor fixing bracket through the needle valve motor slide rail.

6. The automatic adjustment device for the dual-medium atomizing nozzle of the feeder according to claim 5, characterized in that: The control unit also includes a conical valve transmission gear and a motor transmission gear; The cone valve motor controls the movement of the cone valve transmission gear by controlling the rotation of the motor transmission gear.

7. The automatic adjustment device for the dual-medium atomizing nozzle of the feeder according to claim 6, characterized in that: The control unit also includes a screw, a square rod, a screw transmission gear and a screw nut assembly; The square rod is mounted on a frame of the feeder, the screw nut assembly slides relatively with the square rod, and the screw transmission gear drives the screw to rotate.

8. The automatic adjustment device for the dual-medium atomizing nozzle of the feeder according to claim 1, characterized in that: The liquid chamber and the gas chamber are respectively connected to two sides of the connecting assembly through threads.

9. The automatic adjustment device for dual-medium atomizing nozzle of a feeder according to claim 1, characterized in that: The conical valve is threadedly connected to the needle valve, and the conical valve is threadedly connected to the liquid chamber.

10. The automatic adjustment device for dual-medium atomizing nozzle of a feeder according to claim 1, characterized in that: A liquid acceleration channel is provided on the surface of the needle valve, and the liquid acceleration channel is spiral.

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