Automatic tritrichloroethane spraying device

Abstract

The utility model provides a kind of triacetin automatic spraying device, it is related to tobacco industry filter rod forming equipment technical field, and it includes: shell, inside is equipped with air duct, front end is equipped with air outlet, rear end is equipped with air inlet;Fan, install at the air inlet, fan end is connected with the output end of driving motor;Heating assembly, including at least one group of spiral heating wire, fixed in the air duct;Degreasing cotton fixing device includes at least one pair of symmetrical metal clamping piece, metal clamping piece inside is equipped with antiskid tooth pattern, degreasing cotton is fixed in the spiral clearance of heating wire by metal clamping piece;Glycerol dropping system, including liquid storage container, liquid transfer pipe and dropping pump, liquid transfer pipe one end is connected with liquid storage container, the other end extends to the upper of degreasing cotton.The utility model ensures that the size of glycerol particle is uniform, makes glycerol apply more evenly, reduces production cost.

Description

Technical Field

[0001] This utility model relates to the technical field of filter rod forming equipment in the tobacco industry, and in particular to an automatic triacetin spraying device. Background Technology

[0002] The statements in this section are merely background information relating to this disclosure and do not necessarily constitute prior art.

[0003] Cigarette filters are an important component of cigarette products. Their core function is to trap particulate matter in cigarette smoke and selectively adsorb some harmful components, thus directly affecting the flavor and smoking safety of cigarettes. The hardness of the filter is one of its key quality indicators; insufficient or uneven hardness can lead to deformation during subsequent processing and use, affecting the quality of the cigarette product.

[0004] In the filter rod forming process, a plasticizer (i.e., triacetin, commonly known as "glycerin") is usually applied to the cellulose acetate filament bundle. Its function is to soften and bind the monofilaments, thereby giving the filter rod the necessary hardness and formability. Currently, mainstream AF2 / KDF2 filter rod forming units generally adopt a centrifugal spray-coating glycerin application system. The working principle of this system is: liquid glycerin is adhered to the surface of a high-speed rotating metal brush roller, and the centrifugal force generated by the rotation of the brush roller throws the glycerin onto the filament bundle, achieving atomization and application.

[0005] However, this existing technology has significant drawbacks: First, the system has extremely stringent requirements for the parallelism of the brush roller's adhesive surface and its alignment with related components. Even minor installation deviations or operational wear can lead to uneven thickness of the glycerin film adhering to the brush roller surface. Second, because it relies on centrifugal atomization, when the glycerin film is unevenly distributed, the size of the ejected glycerin droplets is highly variable and lacks uniformity. This directly leads to two adverse consequences: first, in areas with larger atomized particles, excessive glycerin penetration can easily form "cavities" (i.e., locally collapsed voids) inside the filter rod; second, in areas with smaller atomized particles, insufficient glycerin application results in localized low hardness of the filter rod. The end result is uneven overall hardness of the filter rod and an excessive cavitation rate, leading to a large number of defective products each year, causing serious waste of raw materials and quality control challenges. Utility Model Content

[0006] To address the shortcomings of existing technologies, this disclosure provides an automatic triacetin spraying device that ensures uniform glycerin particle size, resulting in more even glycerin application and reduced production costs.

[0007] An automatic triacetin spraying device, comprising: The outer shell (1) has an air duct (102) inside, an air outlet (101) at the front end, and an air inlet (103) at the rear end. A fan (4) is installed at the air inlet (103), and the end of the fan (4) is connected to the output end of the drive motor (3); The heating assembly includes at least one set of spiral heating wires (6) fixed inside the air duct (102); The cotton fixing device (2) includes at least one pair of symmetrical metal clips. The inner side of the metal clips is provided with anti-slip teeth. The cotton (7) is fixed in the spiral gap of the heating wire (6) by the metal clips. The glycerin dripping system (5) includes a reservoir (503), a drip tube (501) and a drip pump (502). One end of the drip tube (501) is connected to the reservoir (503), and the other end extends above the absorbent cotton (7).

[0008] Furthermore, the spiral spacing of the heating wire (6) is 5-8 mm.

[0009] Furthermore, the fan (4) is an axial flow fan with 5-7 blades and a gap of 1-2 mm between the outer edge of the blades and the inner wall of the air inlet (103).

[0010] Furthermore, the top of the outer casing (1) is provided with a removable cover plate.

[0011] Furthermore, the glycerin dripping system (5) also includes a dripping nozzle (504), which is installed at the end of the infusion tube (501) extending to one end of the absorbent cotton (7).

[0012] Furthermore, the nozzle diameter of the dripping nozzle (504) is 0.2-0.5 mm.

[0013] Furthermore, the glycerol dripping system (5) also includes a liquid level sensor, which is installed inside the liquid storage container (503).

[0014] Furthermore, the metal clip is fixed to the inner wall of the air duct (102) by screws.

[0015] Furthermore, the top of the metal clip is provided with fixing teeth (8), and the heating wire (6) is wound around the outer periphery of the metal clip and locked on the fixing teeth (8).

[0016] Furthermore, the air duct (102) is a cylindrical cavity, and the ratio of the diameter of the air outlet (101) to the diameter of the air inlet (103) is 2:3.

[0017] Compared with the prior art, the automatic triacetin spraying device provided by this utility model has the following beneficial effects: (1) The absorbent cotton serves as a glycerin carrier, which can uniformly adsorb the liquid from the glycerin dripping system; the heating wire heats it uniformly, causing the glycerin to evaporate into a gas phase; the high-speed airflow generated by the fan quickly carries out the gas phase glycerin and condenses it into uniform, micron-sized atomized particles. This process fundamentally avoids the high dependence of centrifugal atomization on mechanical precision, achieves high homogenization of glycerin spray particles, effectively eliminates the sinkhole phenomenon, and ensures the uniformity of filter rod hardness.

[0018] (2) The spiral spacing of the heating wire is 5-8mm. Within this specific spacing, while ensuring that the degreased cotton is fully filled, the contact area between the heating wire and the airflow is maximized, so that the air flowing through can be heated to the working temperature (such as 150-200℃) quickly and evenly, which significantly improves the heat exchange efficiency, ensures that the glycerin can evaporate instantly after being added, and improves the response speed and production efficiency of the entire system.

[0019] (3) In order to provide a stable and uniform airflow as a carrier for atomized glycerin, the present invention designs the fan as an axial flow fan with 5-7 blades and a gap of 1-2 mm between the outer edge of the blades and the inner wall of the air inlet. This optimized design effectively improves the air intake efficiency, reduces airflow eddies and pressure fluctuations, and can generate stable and directional laminar or quasi-laminar flow, thereby ensuring that the evaporated glycerin vapor is mixed evenly with the hot air and is smoothly delivered to the filament bundle, further consolidating the uniformity of the spray.

[0020] (4) The technical feature of having a removable cover plate on the top of the outer casing allows operators to quickly replace or clean the degreasing cotton and check the heating wire without disassembling the entire device, which greatly reduces maintenance difficulty and time cost, and improves equipment utilization and long-term operational reliability. Attached Figure Description

[0021] The accompanying drawings, which form part of this disclosure, are used to provide a further understanding of this disclosure. The illustrative embodiments of this disclosure and their descriptions are used to explain this disclosure and do not constitute an undue limitation of this disclosure.

[0022] Figure 1 This is a schematic diagram of the automatic triacetin spraying device disclosed in this utility model; Figure 2 This is an internal schematic diagram of the automatic triacetin spraying device disclosed in this utility model.

[0023] In the diagram: 1. Outer shell; 101. Air outlet; 102. Air duct; 103. Air inlet; 2. Degreased cotton fixing device; 3. Drive motor; 4. Fan; 5. Glycerin dripping system; 501. Infusion tube; 502. Drip pump; 503. Liquid storage container; 504. Drip nozzle; 6. Heating wire; 7. Degreased cotton; 8. Fixing teeth. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Please see Figure 1 The present invention provides an automatic triacetin spraying device, comprising: The outer shell (1) has an air duct (102) inside. The front end of the outer shell (1) has an air outlet (101) and the rear end of the outer shell (1) has an air inlet (103). The air duct (102) is connected to both the air outlet (101) and the air inlet (103). The outer shell (1) is made of high-temperature resistant ABS plastic. The internal air duct (102) is a cylindrical cavity with a diameter of 2:3 between the diameter of the air outlet and the diameter of the air inlet. The diameter of the air duct (102) is 8cm and the length is 15cm.

[0026] High-temperature resistant ABS plastic has excellent heat resistance and chemical stability, and can withstand the high-temperature working environment of heating components, avoiding structural failure due to thermal deformation; the cylindrical air duct (102) design is conducive to uniform airflow distribution, reducing turbulence and improving spray uniformity.

[0027] The fan (4) has a speed of 19000 r / min, a rated power of 2200w, and an airflow range of 1.5m. 3 / h, installed at the air inlet (103), the end of the fan (4) is connected to the output end of the drive motor (3); The heating assembly includes at least one set of spiral heating wires (6), the heating wires (6) having a diameter of 4mm and a rated power of 560W, and being fixed inside the air duct (102); like Figure 2The absorbent cotton fixing device (2) includes at least one pair of symmetrical metal clips. The top of the metal clips is provided with fixing teeth (8). The heating wire (6) is wrapped around the outer periphery of the metal clips and is locked on the fixing teeth (8). The inner side of the metal clips is provided with anti-slip teeth. The absorbent cotton (7) is fixed in the spiral gap of the heating wire (6) through the metal clips. The anti-slip teeth are sawtooth or wavy anti-slip teeth. The tooth pitch of the anti-slip teeth is 1 mm and the depth is 0.5 mm. The absorbent cotton (7) fibers can be embedded in the tooth gaps. Even under high temperature or airflow impact, it can still resist sliding. The metal clips are fixed to the inner wall of the air duct (102) by screws.

[0028] The anti-slip serrated design firmly embeds the absorbent cotton fibers into the gaps between the clips, effectively preventing the absorbent cotton from shifting or loosening even under high temperatures or airflow impact (wind speeds can reach 5-8m / s), ensuring the stability of glycerin adsorption and evaporation.

[0029] The glycerin dripping system (5) includes a storage container (503), an infusion tube (501) and a dripping pump (502). The inner diameter of the infusion tube (501) is 5 mm, and the length can be adjusted as needed. One end of the infusion tube (501) is connected to the storage container (503), and the other end extends above the absorbent cotton (7).

[0030] The infusion tubing (501) is a silicone tube, which is corrosion-resistant and flexible, preventing liquid residue; the 0.2mm nozzle diameter enables precise dripping (error less than ±0.05ml / min), ensuring that glycerin evenly covers the surface of the absorbent cotton; the liquid level sensor monitors the liquid level in real time to prevent dry running or overflow, reducing the frequency of manual intervention.

[0031] Specifically, the heating wire (6) of the heating component is made of nickel-chromium alloy and coated with a ceramic insulating layer to prevent short circuits. The spiral spacing of the heating wire (6) is 5, 6 or 8 mm to match the filling thickness of the degreased cotton (7).

[0032] Nickel-chromium alloy has high resistivity and high temperature resistance. Combined with ceramic insulation layer, it can prevent short circuit risk and improve safety. The spiral spacing is adapted to the filling thickness of degreased cotton (7), which increases the contact area between heating wire and airflow, so that the air can be heated to the set temperature (up to 150-200℃) quickly, and accelerates the glycerin evaporation efficiency.

[0033] Specifically, the fan (4) is an axial flow fan with 5, 6 or 7 blades. The gap between the outer edge of the blades and the inner wall of the air inlet (103) is 1, 1.5 or 2 mm to improve the airflow intake efficiency and reduce noise. The axial fan, combined with an optimized blade count and spacing design, significantly improves airflow intake efficiency and reduces noise (by approximately 20%), while ensuring stable airflow and providing a uniform airflow foundation for subsequent atomization.

[0034] Specifically, the top of the outer casing (1) is provided with a removable cover.

[0035] Users can quickly open the casing to clean, replace, or maintain internal components (such as heating wires and degreasing cotton), reducing downtime (maintenance efficiency is improved by about 30%) and extending the service life of the equipment.

[0036] Specifically, the glycerin dripping system (5) also includes a dripping nozzle (504) which is installed at the end of the infusion tube (501) extending to one end of the absorbent cotton (7).

[0037] Specifically, the nozzle diameter of the drip nozzle (504) is 0.2-0.5 mm to achieve precise dripping and ensure that glycerin is evenly distributed on the surface of the absorbent cotton (7).

[0038] Specifically, the glycerol dripping system (5) also includes a liquid level sensor, which is installed inside the liquid storage container (503) to detect the liquid level height.

[0039] The working principle of this utility model is as follows: The glycerol dripping system (5) precisely drips triacetin onto the surface of the absorbent cotton (7) through the dripping nozzle (504). The heating wire (6) heats the absorbent cotton that has adsorbed glycerol, while the drive motor (3) drives the fan (4) to generate a high-speed airflow. The hot airflow mixes with the evaporated glycerol to form uniform atomized particles, which are sprayed out through the air outlet (101) and finally uniformly adhere to the filter rod filament bundle.

[0040] Specifically, the glycerol dripping system (5) is started first. The dripping pump (502) drips triacetin from the storage container (503) onto the absorbent cotton (7) at a precisely controlled flow rate via the infusion tube (501) and the dripping nozzle (504) at the end. The absorbent cotton (7), with its porous fiber structure, rapidly absorbs and evenly disperses the liquid glycerol, forming a stable glycerol storage and evaporation source, thus avoiding direct flow of the liquid.

[0041] Immediately afterwards, the heating components and the fan (4) work synchronously. After the spiral heating wire (6) is energized, it heats up rapidly, and its heat is directly conducted to the glycerin-soaked degreased cotton (7), and the air flowing through its spiral gap is rapidly heated. At the same time, the drive motor (3) drives the fan (4) to rotate at high speed, drawing in air from the air inlet (103) and forming a stable airflow through the air duct (102).

[0042] The key process is that the glycerol adsorbed on the absorbent cotton (7) fibers evaporates rapidly after being heated, changing from a liquid state to a gaseous state. This high-temperature airflow acts as a carrier, instantly carrying away the glycerol vapor. When the glycerol vapor mixes with the airflow, it recondenses into extremely small droplets as the temperature drops slightly during forward flow, thus forming a uniform and delicate glycerol aerosol (i.e., spray) in the air duct (102).

[0043] Finally, the airflow carrying a uniform spray of glycerin is sprayed onto the filter rod's fiber bundle at a certain speed and angle through the air outlet (101). Because the spray particles are small and evenly distributed, they can quickly and evenly penetrate and wet the fiber bundle, thereby effectively giving the filter rod a consistent hardness and fundamentally avoiding quality problems such as cavities and hardness fluctuations caused by excessively large or unevenly distributed glycerin particles.

[0044] In the description of this specification, the terms "connection", "installation", "fixing", "setting", etc. are interpreted in a broad sense. For example, "connection" can be a fixed connection or an indirect connection through an intermediate component without affecting the relationship between components and the technical effect. It can also be an integral connection or a partial connection. In such cases, those skilled in the art can understand the specific meaning of the above terms in this utility model or utility model according to the specific circumstances.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automatic triacetin spraying device, characterized in that, include: The outer shell (1) has an air duct (102) inside, an air outlet (101) at the front end, and an air inlet (103) at the rear end. A fan (4) is installed at the air inlet (103), and the end of the fan (4) is connected to the output end of the drive motor (3); The heating assembly includes at least one set of spiral heating wires (6) fixed inside the air duct (102); The cotton fixing device (2) includes at least one pair of symmetrical metal clips. The inner side of the metal clips is provided with anti-slip teeth. The cotton (7) is fixed in the spiral gap of the heating wire (6) by the metal clips. The glycerin dripping system (5) includes a reservoir (503), a drip tube (501) and a drip pump (502). One end of the drip tube (501) is connected to the reservoir (503), and the other end extends above the absorbent cotton (7).

2. The automatic triacetin spraying device according to claim 1, characterized in that, The spiral spacing of the heating wire (6) is 5-8 mm.

3. The automatic triacetin spraying device according to claim 1, characterized in that, The fan (4) is an axial flow fan with 5-7 blades and a gap of 1-2 mm between the outer edge of the blades and the inner wall of the air inlet (103).

4. The automatic triacetin spraying device according to claim 1, characterized in that, The top of the outer casing (1) is provided with a removable cover plate.

5. The automatic triacetin spraying device according to claim 1, characterized in that, The glycerin dripping system (5) also includes a dripping nozzle (504) which is installed at the end of the infusion tube (501) extending to one end of the absorbent cotton (7).

6. The automatic triacetin spraying device according to claim 5, characterized in that, The nozzle diameter of the dripping nozzle (504) is 0.2-0.5 mm.

7. The automatic triacetin spraying device according to claim 5, characterized in that, The glycerol dripping system (5) also includes a liquid level sensor, which is installed inside the liquid storage container (503).

8. The automatic triacetin spraying device according to claim 1, characterized in that, The metal clip is fixed to the inner wall of the air duct (102) by screws.

9. The automatic triacetin spraying device according to claim 1 or 8, characterized in that, The metal clip has a fixing tooth (8) at the top, and the heating wire (6) is wrapped around the outer periphery of the metal clip and locked onto the fixing tooth (8).

10. The automatic triacetin spraying device according to claim 1, characterized in that, The air duct (102) is a cylindrical cavity, and the ratio of the diameter of the air outlet (101) to the diameter of the air inlet (103) is 2:3.

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