Rapid cooling device for dried tobacco in tobacco production line

Abstract

The present invention discloses a rapid cooling device for dried cut tobacco in a tobacco production line. The device is installed in a vibrating trough downstream of a cut tobacco drying machine and includes a curved cooling plate, air jet holes, a conveying plate, a vortex tube, and a protective plate. A sinusoidal wave surface is designed on the surface of the curved cooling plate according to a mathematical function. Square grooves and air inlet holes are respectively provided at both ends of the wave surface. A trapezoidal groove is provided below the wave crest and communicates with the square groove. Air jet holes are provided on the wave crest and the wave surface, and mounting holes are provided on the wave trough. The curved cooling plate is screwed to the conveying plate in the vibrating trough. The trapezoidal groove, square groove, and conveying plate form a cooling cavity. Refrigeration gas generated by the vortex tube is injected into the air inlet hole through a high-pressure hose and enters the cooling cavity. The cold gas is then ejected through the air jet holes on the curved cooling plate into the dried cut tobacco to cool it. The present invention is used for rapid cooling and shaping of dried cut tobacco in a tobacco production line to improve the sensory quality and quality of cigarettes.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco processing and is applied to a tobacco production line, in particular to a device for rapidly cooling dried tobacco in the tobacco production line. Background Art

[0002] In the tobacco industry's silk-making process, there are strict technical indicators. For example, the width of the tobacco after cutting is 0.7mm~1.2mm, and the moisture content is generally 18.0%~22.0%. The tobacco is heated, humidified, and expanded to an outlet moisture content of 20.0%~30.0% and a temperature of 50.0℃~83.0℃; then, the tobacco is dried in a tobacco drying machine to an outlet moisture content of 11.5%~14.5% and a temperature of 50.0℃~70.0℃. After online transportation and rapid cooling, the tobacco is shaped, and the filling value is ≥4.0%, the whole tobacco rate is ≥80.0%, the broken tobacco rate is ≤2.0%, and the purity is ≥99.0%. Therefore, in order to ensure that the tobacco is quickly shaped, curled, elastic, and has a high filling value, so as to facilitate the next process of completing the preparation, flavoring and mixing of tobacco, stem cuts, expanded tobacco, thin slices, etc., and enable the mixed tobacco to fully absorb the spices, according to technical standards, the material temperature should be ≤45°C and the filling value of the mixed tobacco should be ≥4.2% during mixing and flavoring, so as to facilitate improving the rolling quality, sensory quality and quality of cigarettes.

[0003] In tobacco production lines, to achieve high process efficiency, tobacco is often dried at temperatures exceeding 100°C in a dryer. The dryer then flows out of the dryer at around 70°C, where it is transported via vibrating troughs and belt conveyors to the next process. During blending, mixing, and flavoring, the temperature of the tobacco must be lowered to ≤45°C, or even to an optimal workshop temperature of 25°C. This ensures that the dried tobacco quickly sets, curls, and develops elasticity, achieves a high filling value, and achieves optimal flavor absorption. Therefore, it is extremely difficult to quickly cool the tobacco from around 70°C to below 45°C, or even maintain a workshop temperature of 25°C, before it is transported to the next process via vibrating troughs and belt conveyors. This means that on existing tobacco production lines, it is difficult to achieve optimal cooling within a short period of time, allowing the tobacco to dissipate heat naturally. Even if the conveying distance is increased, the tobacco can naturally dissipate heat to below 45°C when transported to the flavoring machine. However, due to the long conveying path and interval time required, the shape of the tobacco will shrink and change during this period, making it difficult to ensure its curl, elasticity and filling value, and the sensory quality will also change. Therefore, increasing the conveying distance is not the best method. Moreover, it is impossible to reduce production efficiency by extending the vibration trough conveying length or time interval to dissipate heat and cool down.

[0004] In view of the above problems, the inventors of the present invention finally obtained the present invention after a long period of research and practice. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a rapid cooling device for dried tobacco on a tobacco production line, which ensures the rapid cooling and shaping of the dried tobacco and improves the quality of cigarette rolling and splicing.

[0006] The technical solution adopted in the present invention is:

[0007] Provided is a rapid cooling device for dried cut tobacco on a cut tobacco production line, comprising: a curved cooling plate 1, a vibrating groove conveying plate 3 and a vortex tube 5;

[0008] The upper surface of the curved refrigeration plate 1 is formed with a sinusoidal wave surface extending in the longitudinal direction, and the lower surface of the curved refrigeration plate 1 is provided with a trapezoidal groove 1-1, and the trapezoidal groove 1-1 is located below the crest of the sinusoidal wave surface; the curved refrigeration plate 1 may be provided with an air injection hole 2, and the air injection hole 2 is located on the crest and wave surface of the sinusoidal wave surface;

[0009] The vibrating groove conveying plate 3 is located below the curved refrigeration plate 1, and a refrigeration cavity is formed between the vibrating groove conveying plate 3 and the curved refrigeration plate 1;

[0010] The cold air output by the vortex tube 5 is sent into the refrigeration cavity and then ejected through the air injection hole 2 to cool the tobacco on the curved refrigeration plate 1 .

[0011] Furthermore, the sinusoidal wave surface on the upper surface of the curved refrigeration plate 1 is designed according to the following sinusoidal function formula:

[0012]

[0013] Where α is the amplitude, ω is the angular frequency, The initial phase.

[0014] Furthermore, set: angular frequency ω = 1, initial phase When the amplitude α is 1, the sine function formula is: y = sin(x-π / 2) + 1; when the unit value δ represents the nominal size, the wave height A = 2δ and the wavelength λ = 2πδ; the length of the curved refrigeration plate 1 in the vibration groove is an integer multiple of the wavelength, and the width of the curved refrigeration plate 1 is adapted to the width of the vibration groove conveyor plate 3.

[0015] Furthermore, the height h of the trapezoidal groove 1 - 1 is not less than the amplitude α, and the design of the trapezoidal groove does not interfere with the sine wave.

[0016] Furthermore, the aperture of the jet hole 2 is 1 to 3 mm; the coordinate value of its center on the wave crest is y=2, x=(2k-1)π, and the coordinate value on the wave surface is y=1, x=(k-1)π+π / 2, where k is a positive integer.

[0017] Furthermore, the air injection holes 2 on the wave surface of the curved refrigeration plate 1 are evenly distributed, and in a vertical projection of the curved refrigeration plate on a horizontal plane, the distance between any two adjacent air injection holes 2 on the wave surface is not less than 15 mm.

[0018] Furthermore, the normal line of the processed air jet hole 2 is perpendicular to the x-coordinate axis or the minimum angle between the normal line and the x-coordinate axis is 45°.

[0019] Furthermore, a square groove 1-2 is provided on the lower surface of the curved refrigeration plate 1, and the square groove 1-2 is located on the side of the curved refrigeration plate 1 in the width direction. The square groove 1-2 is connected to the trapezoidal groove 1-1, and the trapezoidal groove 1-1, the square groove 1-2 and the vibrating groove conveying plate 3 constitute a refrigeration cavity. An air inlet hole 5-1-1 is provided on the square groove 1-2, and the refrigeration gas generated by the vortex tube 5 is injected into the air inlet hole 5-1-1 through the high-pressure hose 5-1.

[0020] Furthermore, a square groove 1-2 is provided on both sides of the curved cooling plate 1 in the width direction, two air inlet holes 5-1-1 are respectively provided at diagonal positions on the curved cooling plate 1, and two vortex tubes 3 are respectively installed on both sides of the curved cooling plate 1, and are respectively used to inject refrigerant gas into the two air inlet holes 5-1-1.

[0021] Furthermore, a mounting hole 4 - 1 is opened on the wave trough of the curved refrigeration plate 1 , and a screw 4 passes through the mounting hole 4 - 1 to fix the curved refrigeration plate 1 on the vibration groove conveying plate 3 .

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] The rapid refrigeration device of the present invention is designed with a curved refrigeration plate and is provided with trapezoidal and square grooves, which together with the conveyor plate form a refrigeration cavity. Using vortex tube refrigeration technology, it can instantly cool high-pressure gas to dozens of degrees below zero and inject it into the refrigeration cavity. The cold air is then released into the dried tobacco on the curved refrigeration plate through a large number of air jet holes, resulting in a significant rapid refrigeration effect. Because the curved refrigeration plate is made of metal, such as copper, which has good thermal conductivity, the temperature of the curved refrigeration plate is also reduced when cold air is injected into the refrigeration cavity, which is more conducive to heat absorption and cooling of the dried tobacco. Since the dried tobacco has a high flow rate on the vibrating screen conveyor plate, when it enters the curved refrigeration plate, the surface is a sinusoidal wave, which improves the loosening efficiency of the dried tobacco. Furthermore, due to the simple harmonic oscillation of the vibrating screen and the sinusoidal characteristics of the curved refrigeration plate, the flow rate of the dried tobacco is reduced, thereby further maximizing the refrigeration effect. It can ensure that the tobacco cut into shape, curl and become elastic after baking, and improve the filling value, which is beneficial for the next process to complete the preparation, flavoring and mixing of tobacco cut, stem cut, expanded tobacco, thin slices, etc., so that the mixed tobacco can fully absorb the spices. In this technical solution, a standard vortex tube that meets the technical parameters can be selected, because general silk-making workshops are equipped with high-pressure gas and pipelines, which meet the gas input requirements of vortex tube refrigeration technology. Therefore, the conditions for implementing this technical solution are met. Since the curved refrigeration plate and the vibrating screen conveyor plate can be installed and connected with screws, and the vortex tube is maintenance-free, the implementation of this technical solution is low-cost and can be applied to related fields that require rapid refrigeration. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram showing the design principle of a rapid refrigeration device according to an embodiment of the present invention is shown;

[0026] Figure 2 A schematic structural diagram of the lower surface of a curved refrigeration plate according to an embodiment of the present invention is shown;

[0027] Figure 3 A schematic diagram showing the distribution of holes on a curved refrigeration plate according to an embodiment of the present invention on a projection surface;

[0028] Figure 4 Shown Figure 3 Design diagram of the sine wave on the AA section;

[0029] Figure 5 Shown Figure 3 Schematic diagram of the mounting holes and trapezoidal slots on the BB section;

[0030] Figure 6 Shown Figure 3 Schematic diagram of the jet hole on the crest of the sine wave on the CC section;

[0031] Figure 7 Shown Figure 3 Schematic diagram of the jet hole on the sine wave surface on the DD section;

[0032] Figure 8 Shown Figure 3 Schematic diagram of the square slot and air inlet on the EE section;

[0033] Figure 9 A schematic diagram showing the application of the rapid refrigeration device according to an embodiment of the present invention in tobacco transportation is shown. DETAILED DESCRIPTION

[0034] The above and other technical features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.

[0035] 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" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] In the present invention, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0037] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0038] Rapid refrigeration technology is widely used in production and daily life, such as using refrigerators to quickly freeze food and preserve its freshness, thereby locking in its ingredients. Manufacturing industries, such as metalworking, utilize coolants for rapid cooling to prevent cutting tools from overheating and burning. Therefore, it is technically feasible to utilize rapid refrigeration technology to cool dried tobacco on a specific tobacco production line. For example, similar to air conditioning, using compressors, refrigerants, and cooling copper tubes, the solution is not feasible on existing tobacco production lines, or the desired results cannot be achieved. Rapid cooling of dried tobacco requires minimal additional production line accessories, a compact design, and the ability to utilize existing workshop resources at a low cost and with optimal results.

[0039] Vortex tube refrigeration utilizes a vortex tube to create a vortex in a high-speed airflow, separating it into two streams: cold and hot. This refrigeration method utilizes the cold airflow to instantly generate low-temperature and high-temperature gases without the use of any refrigerant. Commonly used gases include air and nitrogen. When the high-pressure gas is at room temperature, the cold airflow can reach temperatures of -10°C to -50°C, and the hot airflow can reach temperatures of 100°C to 130°C. Flow rates can range from 1 to 100 SCFM (standard liters per minute), and hourly heat dissipation and cooling capacity can reach up to 6000 Btu / hr (1512 kcal / hr). Both temperature and flow rates are adjustable on the vortex tube. Vortex tube refrigeration technology utilizes no electricity or chemicals, is compact and lightweight, and can be quickly adjusted via valves. It also has no moving parts, is low-cost, and is maintenance-free. Therefore, vortex tube refrigeration technology is used for the rapid cooling of dried tobacco.

[0040] While the above solution is theoretically feasible, the key technology lies in its implementation: how to introduce low-temperature gas into the dried tobacco. Since the dried tobacco is conveyed through a vibrating trough before being transported on a belt conveyor, repeated research and experimentation have determined that the optimal solution is to introduce low-temperature gas into the vibrating trough conveyor stage. By appropriately designing the cooling range on the vibrating trough conveyor plate, the dried tobacco can be quickly and satisfactorily cooled, ensuring optimal results in processes such as tobacco shaping.

[0041] like Figure 1As shown, in this embodiment, a rapid cooling device for dried tobacco on a tobacco production line is installed in a vibrating trough downstream of the tobacco drying machine and includes: a curved refrigeration plate 1, a vibrating trough conveying plate 3, and a vortex tube 5. The upper surface of the curved refrigeration plate 1 is formed with a sinusoidal wave surface extending in the longitudinal direction, and the lower surface of the curved refrigeration plate 1 is provided with a trapezoidal groove 1-1, which is located below the peak of the sinusoidal wave surface. The curved refrigeration plate 1 may be provided with an air jet 2, which is located on the peak and surface of the sinusoidal wave surface. The vibrating trough conveying plate 3 is located below the curved refrigeration plate 1, and a refrigeration cavity is formed between the vibrating trough conveying plate 3 and the curved refrigeration plate 1. The cold air output by the vortex tube 5 is sent into the refrigeration cavity and ejected through the air jet 2 to cool the tobacco on the curved refrigeration plate 1.

[0042] The conveying trough of the dried tobacco is a simple harmonic vibration. Due to the refrigeration plate containing the sine basis function surface, the peaks and valleys of the sine curve surface can effectively solve the problem of material adhesion or agglomeration in the conveying of materials, with high loosening efficiency, good uniform distribution effect, and extremely low crushing. For example, the surface of the curved refrigeration plate is designed according to the sine basis function equation y=f(x)=α*sin(ωx). Due to its first-order derivative equation The sinusoidal basis function curve is still a sine-based function curve, and the first-order derivative at the peaks and troughs of the curve is 0. Therefore, the function curve has alternating first-order derivative values. The curve surface can provide different alternating normal elastic forces, so it has a high loosening efficiency for the material and has a very high effect on cooling the dried tobacco. The sinusoidal curve surface and air jet holes require NC machine tools to manufacture. Since the production equipment in general silk-making workshops is equipped with high-pressure gas and pipelines, the air pressure is usually 0.7Mpa, which can meet the high-pressure gas input requirements of vortex tube refrigeration technology. Therefore, it has the power and energy to implement this technical solution, and it is convenient and feasible.

[0043] like Figure 1-3 As shown in Figures 9 and 9, more specifically, the curved cooling plate 1 is positioned at the output side of the oscillating trough, with the oscillating trough's guard plates 6 and 7 surrounding the curved cooling plate 1 and the oscillating trough's conveyor plate 3. During operation, the output side of the rapid cooling device docks with a conveyor 20, and the cooled tobacco falls from the curved cooling plate 1 onto a conveyor belt 21 of the conveyor 20.

[0044] Square grooves 1-2 and air inlets 5-1-1 are respectively provided at both ends of the wave surface. A trapezoidal groove 1-1 is provided below the wave crest and communicates with the square groove 1-2. Air jet holes 2 are provided on the wave crest and wave surface. Mounting holes 4-1 are provided in the wave trough, and the curved refrigeration plate 1 is mounted on the vibration trough conveyor plate 3 within the vibration trough using screws 4. The trapezoidal grooves 1-1, square grooves 1-2, and vibration trough conveyor plate 3 form a refrigeration cavity. Refrigeration gas generated by the vortex tube 5 is injected into the air inlet 5-1-1 through a high-pressure hose 5-1, enters the refrigeration cavity, and then is ejected through the air jet holes 2 in the curved refrigeration plate 1 into the dried tobacco, cooling it.

[0045] The surface of the curved refrigeration panel 1 is designed with a sinusoidal wave surface according to the following equation: The selection of angular frequency ω and amplitude α is related to the loosening and conveying efficiency of the material, as well as the manufacturing difficulty and cost of the curved refrigeration plate 1. The optimal angular frequency ω and amplitude α should be determined through specific experiments based on the specific material characteristics, vibration trough performance and technical requirements.

[0046] In a specific embodiment, Figure 1 、 3 As shown in 4, the angular frequency ω can be selected as 1, the initial phase choose When the amplitude α is selected to be greater than 1, there is a better tobacco loosening effect. When the amplitude α is less than 1, there is a smoother tobacco conveying effect. Preferably, α=1, then the sine basis function is set to: y=sin(x-π / 2)+1, x∈[0,+∞).

[0047] Set the nominal size represented by the unit value δ (mm), then the amplitude α = δ, the wave height A = 2δ, and the wavelength λ = 2πδ; set the length of the curved refrigeration plate 1 in the vibration groove, and include integer multiples of the wavelength, that is, determine the value range of x; the width of the curved refrigeration plate 1 is adapted to the width of the vibration groove conveyor plate.

[0048] In this embodiment, ω=1 and α=1 are selected to meet the requirements. The unit value δ is selected based on the characteristics of the vibration trough and the material. In this technical solution, δ=10mm is selected, resulting in an amplitude α=10mm, a wave height A=2δ=20mm, and a wavelength λ=2πδ=62.812mm. The sine curve used in this technical solution extends from the trough to the trough end, so the length of the curved cooling plate 1 contains an integer multiple of the wavelength. In this embodiment, 9 wavelengths are selected to meet the process requirements. In the mathematical equation, the value of x is: x∈[0,18π], so the length of the curved cooling plate 1 is: 9λ=565.486mm. The width of the curved cooling plate 1 is consistent with the width of the vibration trough conveyor plate 3, which is 600mm in the specific embodiment.

[0049] In one embodiment, Figures 3 to 8 As shown, a trapezoidal groove 1-1 is opened under the peak of the sinusoidal wave surface of the curved cooling plate 1, with dimensions of upper base m, lower base n, and height h. The value of height h is not less than the amplitude of the sinusoidal wave, and the trapezoidal groove is designed not to interfere with the sinusoidal wave.

[0050] An air injection hole 2 is provided on the crest of the sinusoidal wave of the curved cooling plate 1, which is connected to the trapezoidal groove 1-1 and has a diameter of For the sine basis function y=sin(x-π / 2)+1, the coordinates of the center of the jet hole 2 on the wave crest are: y=2, x=(2k-1)π, where k is a positive integer.

[0051] An air injection hole 2 is provided on the sinusoidal wave surface of the curved refrigeration plate 1, which is directly connected to the trapezoidal groove 1-1. The aperture is For the sine basis function: y = sin(x-π / 2) + 1, preferably: the coordinate value of the center of the jet hole 2 on the wave surface is: y = 1, x = (k-1)π + π / 2, k is a positive integer, and the normal of the processed jet hole 2 is perpendicular to the x-axis or the minimum angle between the normal and the x-axis is 45°.

[0052] Square grooves 1-2 and air inlet holes 5-1-1 are respectively provided at the lower part of the wave surface at both ends of the curved refrigeration plate 1, so that the two air inlet holes 5-1-1 are respectively located at diagonal positions of the curved refrigeration plate 1, so that when the curved refrigeration plate 1 is installed on the vibration groove conveyor plate 3, the two vortex tubes 3 are respectively installed on both sides of the vibration groove conveyor plate 3.

[0053] The air injection holes 2 on the wave surface of the curved refrigeration plate 1 are evenly distributed. In the projection plane, the distance between any two adjacent air injection holes 2 on the wave surface is not less than 15 mm.

[0054] See also Figure 1 、 2 The refrigeration cavity is actually constructed by opening a trapezoidal groove 1-1 at the bottom of the curved refrigeration plate 1 and connecting it with a square groove 1-2 and a vibration groove conveying plate 3, and then designing the air inlet 5-1-1 and the air jet hole 2 to realize the refrigeration function.

[0055] In a specific embodiment, see Figure 5 A trapezoidal groove 1-1 is opened under the peak of the sinusoidal wave surface of the curved refrigeration plate 1, with dimensions of upper base m = 12 mm, lower base n = 43.12 mm, and height h = 16 mm (including wall thickness 2 mm). The value of height h is much larger than the sinusoidal wave amplitude α = 10 mm. Therefore, the trapezoidal groove does not interfere with the sine wave.

[0056] See also Figure 8 In this embodiment, the aperture of the air inlet 5-1-1 is Therefore, the width of the square groove 1-2 can be greater than 6 mm, and the depth can meet the requirements if it is less than or equal to h=16 mm.

[0057] See also Figure 6 、 7 The jet hole design has the final effect of spraying the cold air evenly and densely into the dried tobacco. Therefore, in this embodiment, the jet hole 2 is selected to have a diameter of To meet technical requirements, the hole positions are distributed on the wave crest and wave surface according to mathematical equations, and the normal line for processing the jet hole 2 is perpendicular to the x-axis. Theoretically, the best jet effect should be achieved using a normal line on the sine wave surface. If the jet hole 2 is processed using a normal line, the angle between the processing direction and the x-axis is 45° or 135°. Therefore, the normal vector can be determined by using a specific NC machine tool for processing.

[0058] Figure 3 A schematic diagram of the distribution of holes on the surface of the curved refrigeration plate 1 on the projection surface is shown, namely, the projection of the jet holes 2, the mounting hole 4-1, and the air inlet hole 5-1-1 on the vibration groove conveyor plate 3. The length of the curved refrigeration plate 1 is designed to be 565.486 mm and the width is designed to be 600 mm. In this embodiment, the minimum projection distance between any jet holes 2 is 21.55 mm.

[0059] See also Figure 5 , the mounting hole 4-1 is designed at the trough of the sinusoidal curve surface, with a diameter of The vibration groove conveying plate 3 is configured to facilitate the installation of the curved refrigeration plate 1 and the conveying plate 3 together with screws 4.

[0060] See also Figure 1 , connect high-pressure gas to the high-pressure air inlet pipe 5-4 of the vortex tube 3, and connect the refrigerant gas to the air inlet 5-1-1 through the cold air pipe 5-3, the adapter 5-2 and the high-pressure hose 5-1 so that it can enter the refrigeration cavity. Install necessary devices such as thermal insulation sleeves on the hot air pipe 5-5 to protect the overflowing hot air. Adjust the parameters of the vortex tube 3 to achieve the best cooling effect on the dried tobacco. Use a double vortex tube 3 for cooling in order to obtain enough refrigerant gas, which is conducive to the rapid cooling of the dried tobacco. In the specific implementation, the cooling temperature and flow of the double vortex tube 3 can be adjusted. At the same time, when the high-pressure gas is connected to the high-pressure air inlet pipe 5-4, an electromagnetic valve is also used to control the high-pressure gas. Since the temperature of the hot air overflowing from the hot air pipe 5-5 is very high, thermal insulation sleeves, protective tubes, etc. are used for drainage to avoid burns.

[0061] To improve the efficiency of rapidly cooling the dried tobacco, the curved cooling plate 1 can be made of copper, iron, or aluminum. Since the thermal conductivity coefficients of copper, iron, and aluminum are approximately 401 W / (m·K), 80 W / (m·K), and 237 W / (m·K), respectively, copper is preferred based on its thermal conductivity and thermal conductivity. While copper offers excellent results, considerations such as manufacturing cost and durability should be considered. Iron is used in this example.

[0062] The vortex tube 3 is used as a universal component and should be determined according to the requirements of the specific application, mainly involving the vibration trough performance, tobacco flow rate and the temperature difference required.

[0063] The above are only preferred embodiments of the present invention and are illustrative rather than restrictive. The structures and connection methods of the various components in the present invention are subject to change. Any equivalent transformations and improvements based on the technical solution of the present invention should not be excluded from the scope of protection of the present invention.

Claims

1. A rapid cooling device for dried tobacco in a tobacco production line, characterized in that: include: A curved refrigeration plate (1), a vibration groove conveying plate (3) and a vortex tube (5); The upper surface of the curved refrigeration plate (1) is formed with a sinusoidal wave surface extending in the longitudinal direction; the lower surface of the curved refrigeration plate (1) is provided with a trapezoidal groove (1-1), and the trapezoidal groove (1-1) is located below the crest of the sinusoidal wave surface; the curved refrigeration plate (1) is provided with an air jet hole (2), and the air jet hole (2) is located on the crest and the wave surface of the sinusoidal wave surface; The vibrating groove conveying plate (3) is located below the curved surface refrigeration plate (1), and a refrigeration cavity is formed between the vibrating groove conveying plate (3) and the curved surface refrigeration plate (1); The cold air output by the vortex tube (5) is sent into the refrigeration cavity and then ejected through the air jet hole (2) to cool the tobacco on the curved refrigeration plate (1); The sinusoidal wave surface on the upper surface of the curved refrigeration plate (1) is designed according to the following sinusoidal function formula: Where α is the amplitude, ω is the angular frequency, is the initial phase; setting: angular frequency ω=1, initial phase Amplitude α=1, then the sine function formula is: y=sin(x-π / 2)+1; The unit value δ is set to represent the nominal size, then the wave height A=2δ, the wavelength λ=2πδ; the length of the curved refrigeration plate (1) in the vibration groove is an integer multiple of the wavelength, and the width of the curved refrigeration plate (1) is adapted to the width of the vibration groove conveying plate (3); the height h of the trapezoidal groove (1-1) is not less than the amplitude α, and the design of the trapezoidal groove does not interfere with the sine wave; the aperture of the jet hole (2) is: 1~3mm; the coordinate value of its center on the wave crest is: y=2, x=(2k-1)π, and the coordinate value on the wave surface is: y=1, x=(k-1)π+π / 2, k is a positive integer.

2. A rapid refrigeration device according to claim 1, characterized in that: The air jet holes (2) on the wave surface of the curved refrigeration plate (1) are evenly distributed, and in a vertical projection of the curved refrigeration plate on a horizontal plane, the distance between any two adjacent air jet holes (2) on the wave surface is not less than 15 mm.

3. A rapid refrigeration device according to claim 1, characterized in that: The lower surface of the curved refrigeration plate (1) is provided with a square groove (1-2), the square groove (1-2) is located on the side of the curved refrigeration plate (1) in the width direction, the square groove (1-2) is connected to the trapezoidal groove (1-1), the trapezoidal groove (1-1), the square groove (1-2) and the vibration groove conveying plate (3) constitute a refrigeration cavity, the square groove (1-2) is provided with an air inlet (5-1-1), and the refrigeration gas generated by the vortex tube (5) is injected into the air inlet (5-1-1) through the high-pressure hose (5-1).

4. A rapid refrigeration device according to claim 3, characterized in that: A square groove (1-2) is provided on each side of the curved refrigeration plate (1) in a width direction, two air inlet holes (5-1-1) are provided at diagonal positions on the curved refrigeration plate (1), and two vortex tubes (5) are installed on each side of the curved refrigeration plate (1) and are used to inject refrigeration gas into the two air inlet holes (5-1-1).

5. The rapid refrigeration device according to claim 1, characterized in that: The curved refrigeration plate (1) is made of metal material, and a mounting hole (4-1) is provided on the wave trough thereof. Screws (4) pass through the mounting hole (4-1) to fix the curved refrigeration plate (1) on the vibration groove conveying plate (3).

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