High pressure nozzle device for filter rod making machine

Abstract

This utility model relates to the technical field of tobacco processing equipment, specifically to a high-pressure nozzle device for a filter rod forming machine, aiming to solve the problems of uneven airflow and unstable fiber filling in existing single-path nozzles. The device mainly consists of a central guide cone and an outer casing tube, which are connected by threads to achieve relative axial adjustment, forming an adjustable cross-sectional area annular jet channel. Two symmetrical air inlet pipes are provided on the side wall of the outer casing tube. Compressed air enters the jet channel through the air inlet pipes and is ejected at high speed from multiple jet nozzles, propelling the fiber material along the tube direction and achieving uniform compaction. The device is also equipped with a fixed support and related connecting parts, facilitating installation on the filter rod forming machine and ensuring operational stability. By adjusting the insertion depth of the central guide cone, the airflow intensity can be flexibly controlled, significantly improving the stability of fiber conveying and the forming quality of the filter rod. This device has a simple structure, is easy to install, and is suitable for improving filter rod production efficiency and product performance.

Description

Technical Field

[0001] This utility model relates to the technical field of tobacco processing equipment, specifically to a high-pressure nozzle device for a filter rod forming machine, which is suitable for the airflow conveying and compaction forming process of tobacco tow. Background Technology

[0002] The filter rod is an important component of filter cigarettes, usually made of cellulose diacetate tow. Its function in cigarettes is to filter harmful substances such as tar and nicotine from the smoke and improve smoking comfort. The tow needs to go through steps such as opening, atomizing adhesive spraying, airflow conveying, and pressing during the filter rod forming process. Among these steps, the high-pressure nozzle device is used to convey the opened tow strips to the forming section under the action of high-speed airflow.

[0003] The high-pressure nozzle structure used in existing filter rod forming equipment is mostly a single-path air supply, with the air inlet pipe usually located above the nozzle, allowing the gas to blow the filament bundle from top to bottom. This structure leads to uneven airflow distribution and a unidirectional driving force, which can easily cause problems such as uneven filament filling density, unstable suction resistance, and large differences in filter rod hardness, thus affecting product quality.

[0004] Therefore, it is necessary to provide a dual-air-path high-pressure nozzle structure that is structurally sound, flexible in adjustment, and provides a more uniform airflow distribution to improve the consistency of filter rod products. Utility Model Content

[0005] To address the aforementioned deficiencies or defects in the existing technology, this utility model provides a high-pressure nozzle device for a filter rod forming machine, comprising: The central guide cone has a knob operation part at one end, an external thread section in the middle, and a cone head section at the other end. The central guide cone has a hollow structure and a through-hole material channel is formed inside. The outer casing is fitted over the outside of the central guide cone. Its inner wall is provided with an internal thread section, a tapered fitting section and an outlet pipe section from the inlet end to the outlet end. The internal thread section is threadedly fitted with the external thread section. The tapered fitting section is used to fit the cone head section. The outlet pipe section is aligned and connected with the filament material channel. At least two air intake pipes are symmetrically arranged on the side wall of the outer casing tube and are connected to the annular jet passage formed between the cone-shaped section and the cone-shaped mating section; Multiple jet nozzles are located in the inlet area of ​​the outlet pipe section, communicate with the annular jet channel, extend axially and are distributed in a ring around the central axis, and are used to guide the airflow to be ejected along the direction of the filament bundle.

[0006] In some embodiments, the jet nozzles extend along the central axis, and the number is no less than four, preferably no less than eight, with the multiple jet nozzles evenly distributed in a ring around the circumference of the outlet pipe section.

[0007] In some embodiments, the length of the jet nozzle is in the same direction as the airflow direction.

[0008] In some embodiments, the knob operating part is a convex annular structure that can be rotated manually or driven with a tool.

[0009] In some implementations, a jet channel adjustment gap is provided between the knob operating part and the top of the outer casing tube.

[0010] In some embodiments, the outlet section is an elongated cylindrical tube integrally formed with the outer casing.

[0011] In some embodiments, the outlet pipe section is detachably connected to the outer casing pipe body.

[0012] In some embodiments, the intake pipe is connected to the air source pipe via a quick connector and is fixed to the outside of the outer casing by clamps or screws.

[0013] In some embodiments, the inner diameter of the filament material channel gradually decreases from the knob operating section toward the outlet section.

[0014] In some embodiments, the device further includes a fixing structure for mounting the outer casing to the molding machine body; the fixing structure includes: A fixed support is installed at the connection between the outer casing and the outlet pipe section; The fixed support is installed on the outer casing tube by a first set screw; The fixed support is connected and fixed to the cigarette tongue bracket by screws; The outlet pipe section is inserted into the suction hood; The air intake pipe is connected to the compressed air source via a quick connector and is fixed to the outer casing via a clamp or a second set screw.

[0015] The high-pressure nozzle device for a filter rod forming machine, which applies the above-mentioned technical solution of this utility model, has the following effects: Improve airflow uniformity: Adopt dual air intake, the airflow is evenly introduced into the annular jet channel from both sides, improving the stability of the filament conveying; Achieve precise adjustment: The central guide cone is threaded with the outer casing tube, and the airflow channel area can be adjusted by rotation to flexibly control the airflow intensity; Improving molding quality: The jet nozzle sprays air along the axial direction, which can promote the uniform distribution of the filament bundle in the outlet tube section, and improve the density and consistency of the filter rod; Compact structure and highly replaceable: The whole is in the shape of a straight tube, which is easy to install and replace, and is compatible with the original filter rod forming system interface.

[0016] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the nozzle device of this utility model; Figure 2 This is a schematic diagram of the nozzle device of this utility model after installation; Explanation of reference numerals in the attached figures 1- Nozzle device, 2- Outlet pipe section, 3- Inlet pipe, 4- Central guide cone, 5- Outer shell pipe, 6- Threaded connection section, 7- Annular jet channel, 8- Knob operation part, 9- Jet channel adjustment gap, 10- Fixed support, 11- First tightening screw, 12- Smoke tongue bracket, 13- Mounting screw, 14- Suction hood, 15- Compressed air pipe, 16- Quick connector, 17- Clamp, 18- Second tightening screw. Detailed Implementation

[0018] The specific embodiments of this utility model are described in detail below. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0019] The device is a tubular structure as a whole. Figure 1 As shown, it mainly includes the following components: The outer shell tube 5 consists of a relatively thick cylindrical body and a slender outlet tube 2 extending from it, forming an external support structure for the filter rod filament bundle material and the air jet channel.

[0020] The central guide cone 4 has a hollow structure with a through-hole cavity, forming the inlet and outlet channels for the filament material. The inner diameter of the inlet end of the internal cone is relatively large, shaped like a trumpet, which facilitates the smooth reception of the filament material conveyed from the previous loosening section. The outer surface is provided with the following sections from top to bottom: a knob operating part 8, an external thread section, and a cone head section.

[0021] The exposed part of the knob operation section 8 has a ring-shaped or raised structure, which facilitates manual or tool-based rotation adjustment.

[0022] The external thread section engages with the threaded groove on the inner wall of the outer casing tube 5, allowing the central guide cone 4 to be adjusted axially.

[0023] The conical section is inserted into the conical groove inside the outer casing tube 5 to form an adjustable airflow channel.

[0024] The threaded connection section 6 is a threaded structure in which the external threaded section of the inner cone cylinder matches the internal threaded groove of the outer shell. By rotating the knob operating part 8, the inner cone cylinder can be moved axially to adjust the insertion depth of the cone section and the conical groove.

[0025] The conical mating section is the conical groove portion on the inner wall of the outer casing tube 5. After the conical head section is inserted into it, an annular airflow channel (jet passage) is formed between the two. The cross-sectional area of ​​this channel is changed by adjusting the insertion depth, thereby regulating the airflow velocity and pressure.

[0026] The outlet section 2 is an extension of the outer casing 5. It is slender and its inner diameter is aligned with the material channel of the inner cone to ensure smooth passage of the filament bundle, while providing a jet outlet for the airflow. The outlet section 2 is designed as an integral or detachable structure for easy maintenance and replacement.

[0027] The intake pipes 3 are located symmetrically on both sides of the outer casing 5, and there are usually two of them. They are specifically used to introduce compressed air. The intake pipes 3 are connected to the compressed air pipe 15 via quick connectors 16 and are fixed by clamps 17 to ensure airtightness and stable air supply. After the airflow enters the annular jet channel 7, it is ejected through the jet nozzle.

[0028] Multiple jet nozzles are provided, evenly distributed along the axial direction and around the pipe axis, forming an annular airflow jet surface. The jet airflow acts on the filament material, propelling it forward along the direction of the outlet pipe section 2 and compacting it into shape.

[0029] The mounting structure of nozzle device 1 is as follows: Figure 2 As shown, the fixed support 10 is installed at the junction of the outlet pipe section 2 and the outer casing pipe 5, and is fixed by the first tightening screw 11. The fixed support 10 is then connected to the smoke tongue bracket 12 by the mounting screw 13 (M6 screw), realizing the fixed connection between the entire device and the main body of the molding machine. The outlet pipe section 2 is inserted into the suction hood 14 to ensure smooth connection of the suction airflow.

[0030] The intake pipe 3 is connected to the compressed air pipe 15 via a quick connector 16 to ensure quick assembly and disassembly.

[0031] The intake pipe 3 is fixed to the outer casing pipe 5 by clamp 17 to prevent loosening.

[0032] A second locking screw 18 is provided on the outer side of the outer casing tube 5 to fix the mechanical position of the device and stabilize the airflow.

[0033] Examples of specific implementation details: The knob control section 8 can be designed as a ring handle with a non-slip texture, allowing operators to quickly adjust it without additional tools.

[0034] The threaded connection section 6 can use trapezoidal threads or standard metric threads to ensure a secure and adjustable connection.

[0035] The jet inlet is designed as a long strip groove with a width of about 1-3mm and a depth of about 0.5-2mm, with 4-8 inlets evenly distributed around the inlet circumference of the outlet pipe section 2.

[0036] When the intake pipe 3 is connected to the quick connector 16, the sealing ring is made of high-pressure resistant rubber to ensure airtightness.

[0037] The fixed support 10 is made of corrosion-resistant aluminum alloy or stainless steel and is mechanically and stably fixed by a set screw and an M6 screw.

[0038] The outlet pipe section 2 can be designed as a detachable structure, allowing for quick replacement via clips or threads, facilitating maintenance.

[0039] Working principle: After the device is installed on the molding machine and connected to compressed air, the compressed air is introduced through two symmetrical air inlet pipes 3, passes through the annular jet channel 7, and forms an annular high-speed airflow through multiple jet slots, propelling the filament material forward along the outlet pipe section 2. The airflow simultaneously achieves further loosening and compaction of the filament, improving the filling uniformity and the molding quality of the filter rod.

[0040] Users can rotate the knob operating part 8 to move the internal tapered cylinder threaded section axially, adjust the insertion depth of the tapered section and the tapered groove, control the cross-sectional area of ​​the air jet channel, and flexibly adjust the airflow speed and jet pressure to adapt to different filament characteristics and production conditions, thereby improving the adaptability and ease of use of the device.

[0041] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0042] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0043] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A high-pressure nozzle device for a filter rod making machine, characterized by, include: The central guide cone (4) has a knob operation part (8) at one end, an external thread section in the middle, and a cone head section at the other end. The central guide cone (4) is a hollow structure, and the inside is a through-flow material channel for the filament bundle. The outer shell tube (5) is sleeved on the outside of the central guide cone (4). Its inner wall is provided with an internal thread section, a tapered fitting section and an outlet tube section (2) from the inlet end to the outlet end. The internal thread section is threadedly fitted with the external thread section. The tapered fitting section is used to fit the cone head section. The outlet tube section (2) is aligned and connected with the filament material channel. Two air intake pipes (3) are symmetrically arranged on the side wall of the outer casing (5) and are connected to the annular jet channel (7) formed between the cone section and the cone mating section; Multiple jet nozzles are located in the inlet area of ​​the outlet pipe section (2), communicate with the annular jet channel (7), extend axially and are distributed in a ring around the central axis, and are used to guide the airflow to be ejected along the direction of the filament advance.

2. The nozzle device according to claim 1, characterized in that, The jet nozzles extend along the central axis and are no less than eight in number, and are evenly distributed in a ring around the circumference of the outlet pipe section (2).

3. The nozzle device of claim 1, wherein, The length of the jet nozzle is in the same direction as the airflow direction.

4. The nozzle apparatus of claim 1, wherein, The knob operating part (8) has an outwardly convex ring structure, which can be directly rotated manually or driven with the help of tools.

5. The nozzle apparatus of claim 1, wherein, A jet channel adjustment gap (9) is reserved between the knob operation part (8) and the top of the outer casing tube (5).

6. The nozzle apparatus of claim 1, wherein, The outlet pipe section (2) is a slender round pipe integrally formed with the outer shell pipe body (5).

7. The nozzle apparatus of claim 1, wherein, The outlet pipe section (2) is detachably connected to the outer casing pipe body (5).

8. The nozzle apparatus of claim 1, wherein, The air intake pipe (3) is connected to the air source pipe via a quick connector (16) and is fixed to the outside of the outer casing (5) by a clamp (17) or screws.

9. The nozzle apparatus of claim 1, wherein, The inner diameter of the filament material channel gradually decreases from the knob operation part (8) towards the outlet pipe section (2).

10. The nozzle apparatus of claim 1, wherein, The device further includes a fixing structure for mounting the outer casing (5) to the molding machine body; the fixing structure includes: A fixed support (10) is provided at the connection between the outer shell tube (5) and the outlet tube section (2); The fixed support (10) is installed on the outer shell tube (5) by the first fastening screw (11); The fixed support (10) is connected and fixed to the cigarette tongue bracket (12) by screws; The outlet pipe section (2) is inserted into the suction hood (14); The intake pipe (3) is connected to the compressed air source via a quick connector (16) and is fixed to the outer casing (5) via a clamp (17) or a second fastening screw (18).

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