Tobacco material air pipe blanking conveying device based on air holes in Archimedes spiral

Abstract

The utility model discloses a tobacco material air pipe blanking conveying device based on air holes in an Archimedes spiral. The tobacco material air pipe blanking conveying device comprises an input pipe, a negative pressure conveying pipe, a falling pipe, an Archimedes spiral air hole plate, an air pipe and the like. Tobacco materials are input through the input pipe and enter the negative pressure conveying pipe under the wind action of the Archimedes spiral air hole plate and the air pipe to generate vortex spiral wind, and smooth conveying of the materials is achieved. The Achimedean spiral air hole plate is a circular plate with the outer circle diameter matched with the inner diameter of the air pipe, the circle center (x0, y0) of the air hole phi D surface is located on the Achimedean spiral, the parameter equation of the Achimedean spiral air hole plate is x = c + b.t.cos (2Pit), y = c + b.t.sin (2Pit), and the thickness h of the Achimedean spiral air hole plate is larger than or equal to the phi D value. Tobacco materials can be efficiently conveyed in the air pipe, smoothness is improved, breakage is reduced, and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of tobacco, relates to cigarette production technology, concretely relates to tobacco material air pipe blank conveying device based on archimedes spiral line upper air hole. BACKGROUND

[0002] It is common in tobacco industry to apply air pipe to transport material by air force, which has the advantages of beautiful and compact pipeline layout, high conveying efficiency, etc., and the disadvantages of easy blockage of pipeline, high cost, etc., such as tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco sheet, tobacco shred and tobacco shred.

[0003] The feature of material transported by air force is to complete the "pressure difference" between the pressure in the air pipe and the atmospheric pressure, and the wind speed in the pipe is generally 10-20 m / s. The greater the "pressure difference", the greater the wind speed, the faster and smoother the material flow in the air pipe, and the higher the investment cost of the related equipment. Therefore, different tobacco material conveying requirements should be designed specifically, and the "pressure difference" value and the air pipe diameter value should not be blindly pursued.

[0004] The problem of easy blockage of pipeline often occurs at the pipe bend or right-angle bend. The technical solution studied by the present application is to solve the problem of material blockage at the pipe bend, especially at the starting end of material conveying. The main reason why the starting end of material conveying is easy to block is that the momentum (or impulse) of the material at this position is not large, such as the tobacco shred in the sieve tobacco stem being easy to jam when it enters the input end. The problem of material blockage in the pipeline is often caused by serious material entanglement and agglomeration, large material density and weight, and poor physical and chemical indicators such as adhesion, etc.

[0005] To solve the problem of smoothness of material transported by air force, the applicant has researched Chinese patents such as "Double-layered bend structure, pipeline section and material conveying pipeline (ZL202410559746.X)", which is aimed at long-distance conveying of tobacco shred and adopts sine curve and rifling technology to reduce the tobacco shred breakage rate in tobacco shred conveying. Chinese patent such as "Relay conveying device for transferring sheet material from sieve outlet to negative pressure pipeline (ZL202210151420.4)" is aimed at dust removal and air force conveying of tobacco ash and tobacco dust, and the "air supplementing plate" at one end adopts a honeycomb-shaped honeycomb end plate to avoid wind singing caused by high-speed air flow and to ensure smooth feeding of the feeding hopper. If the problem of tobacco stem air force conveying in the present case is only considered in terms of smoothness, it is obvious that the two patent technologies can theoretically participate in the solution. However, due to the high density and weight of tobacco stem, high hardness, and different sizes, the probability of material jamming is high, and the cost of using the above-mentioned related technology is high. Therefore, further research on related solutions is still needed, such as using the principle of Archimedes spiral to generate spiral wind in the conveying pipe to improve the smoothness of tobacco stem air force conveying.

[0006] In summary, in order to solve the problem of flow in the pneumatic conveying of tobacco material, the air hole, the air baffle and the air pipe falling material transmission of the Archimedes spiral are researched, which has application prospect. Practical new type content

[0007] In order to solve at least one aspect of the above problem, the utility model discloses a kind of tobacco material air pipe falling material transmission device and method based on air hole on Archimedes spiral, device includes input pipe, negative pressure transmission pipe, down pipe, Archimedes spiral air hole plate, air hole etc.;Tobacco material is input by input pipe, under the action of Archimedes spiral air hole plate and air pipe power, vortex spiral wind is generated in negative pressure transmission pipe, and material flow transmission is realized smoothly;Archimedes spiral air hole plate is circular plate with the matching outer circle diameter and air pipe inner diameter, air hole The center (x0, y0) of the surface is on the Archimedes spiral, and the parametric equation is: x=c+b·t·cos (2π), y=c+b·t·sin (2πt), the tangent is P, the tangent plane is M and perpendicular to the xoy plane, the processing direction of the air hole is along the tangent P vector direction, and forms an angle β with the tangent P in the tangent plane M, β is preferably 45°, the arc length distance between adjacent air holes on the Archimedes curve is the same S, The thickness h of the Archimedes spiral air hole plate is greater than or equal to The value;The utility model can make tobacco material transmit efficiently in air pipe, improve flow, reduce crushing, etc.

[0008] The utility model discloses a kind of tobacco material air pipe falling material transmission devices based on air hole on Archimedes spiral, it is characterized in that, it includes input pipe 1, negative pressure transmission pipe 2, down pipe 3 and air pipe 7;

[0009] The input pipe 1, the down pipe 3 and the negative pressure transmission pipe 2, the air pipe 7 are "cross" interpenetration;

[0010] The down pipe 3 bottom has valve 4, and the down pipe 3 and the valve 4 between junction have spring piece 41;

[0011] The air pipe 7 has Archimedes spiral air hole plate 5, and the Archimedes spiral air hole plate 5 has air hole 6;

[0012] The air pipe 7 has air door 9, and the air door 9 is located on the side of the Archimedes spiral air hole plate 5 away from the negative pressure transmission pipe 2;

[0013] Wherein, the Archimedes spiral air hole plate 5 is circular plate with the matching outer circle diameter and the air pipe 7 inner diameter, and the air hole 6 is through hole processed in the circular plate The center of the surface of the air hole 6 is on an Archimedes spiral, and the center of the circular plate surface is the coordinate system origin. The Archimedes spiral parameter equation is: x=c+b·t·cos(2πt), y=c+b·t·sin(2πt). The thickness h of the Archimedes spiral air hole plate 5 is greater than or equal to value

[0014] Further, the center (x0, y0) of the surface of the air hole 6 is on an Archimedes spiral, the tangent is P, the tangent plane is M, and is perpendicular to the xoy plane. The processing direction of the air hole 6 is along the tangent P vector direction, and the tangent P forms an angle β in the tangent plane M, 30°≤β≤60°, and the angle β is preferably 45°.

[0015] Further, the distance between adjacent air holes 6 on the Archimedes curve is the same S. One method is to use CAD / CAM design, and another method is to use the polar coordinate arc length integral formula calculation, wherein,

[0016] Further, a Cartesian coordinate system is established, c=0, b=20mm, and the Archimedes spiral parameter equation is implemented as:

[0017]

[0018] or the polar equation ρ=aθ, θ=2πt, a=10θ / π.

[0019] Further, the damper 9 is installed on the damper shaft 10, and the air pipe 7 has an air adjusting handle 8. The opening and closing size of the damper 9 is controlled by the air adjusting handle 8 through the damper shaft 10, so as to control the air volume entering the Archimedes spiral air hole plate 5 and the air pipe 7.

[0020] Further, the air hole 6 can be, but is not limited to, a round hole, an oval hole, or a kidney-shaped hole.

[0021] Further, the relationship between the ventilation area Q1 of all the air holes 6 on the Archimedes spiral air hole plate 5 and the ventilation area Q2 of the input pipe 1 air pipe caliber is: Q1>Q2, or Q1 / Q2>1.

[0022] The utility model discloses a second aspect provides a kind of tobacco material air pipe blank conveying method based on Archimedes spiral line gas hole, use the tobacco material air pipe blank conveying device based on Archimedes spiral line gas hole described in the first aspect of the utility model, it includes: tobacco material is input by the input pipe 1, a part of material falls into the drop tube 3, when reaching certain weight, the valve 4 controlled by the spring leaf 41 is released and automatically closed;Another part of material is under the action of the air force of the Archimedes spiral gas hole plate 5 and the air pipe 7 into the negative pressure conveying pipe 2 to realize transmission tobacco material.

[0023] The utility model discloses a third aspect provides a kind of tobacco or tobacco sheet conveying device in re-drying process in cut tobacco process, based on the tobacco material air pipe blank conveying device based on Archimedes spiral line gas hole described in the first aspect of the utility model, discard the drop tube 3, the spring leaf 41 and valve 4.

[0024] The utility model discloses a fourth aspect provides a kind of tobacco or tobacco sheet conveying method in re-drying process in cut tobacco process, use the tobacco sheet conveying device in re-drying process in cut tobacco process described in the third aspect of the utility model, it includes: tobacco material is input by the input pipe 1, tobacco material is under the action of the air force of the Archimedes spiral gas hole plate 5 and the air pipe 7 into the negative pressure conveying pipe 2 to realize transmission tobacco material.

[0025] The tobacco material air pipe blank conveying device and method based on Archimedes spiral line gas hole of the utility model embodiment have the following beneficial effects:

[0026] 1) in tobacco stem conveying screen separation production line, since small size tobacco stem classified by screening is conveyed to centralized processing point by negative pressure pipeline, such as patent Figure 3 、 4 Small size tobacco stem is input by input pipe 1 and then conveyed by negative pressure conveying pipe 2, since the tobacco stem is classified by screening, therefore, the amount and size difference of input to input pipe 1 fluctuate greatly, and the density of tobacco stem is also great, so that blank falls to the first right-angle bend has the risk of jamming, if not designed drop tube 3 and air pipe 7, once blocking, it is difficult to remove, will affect the normal operation of production line. Therefore, the "cross" shape interpenetrating structure of the air pipe designed in the technical solution can effectively solve the technical problem.

[0027] 2) since Archimedes spiral gas hole plate 5 is installed in air pipe 7, and gas hole 6 is distributed in the tangent vector direction of Archimedes spiral, therefore, the wind entering the gas hole plate will advance in the negative pressure conveying pipe 2 in high-speed rotating mode, effectively improve the fluency of tobacco material conveying in pipe.

[0028] 3) Although there is an Archimedes spiral air hole plate 5 in the design scheme, the strong cyclone makes the conveying smoothness improve, but the physical characteristics of the tobacco stem are quite different, the tobacco stem with larger weight or crooked stem can fall into the falling pipe 3, when the weight accumulates to a certain weight, the valve 4 controlled by the spring sheet 41 is released and automatically closed, which improves the reliability of the design device.

[0029] 4) The Archimedes spiral air hole plate 5 in the technical scheme has important application and popularization value in the tobacco industry, re-drying and other fields such as agriculture, medicine and mining, and can produce a spiral cyclone, so that the material is transmitted in the center of the air pipe, the material crushing is reduced, and the conveying smoothness is improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to better understand the above and other purposes, features, advantages and functions of the present application, reference can be made to the embodiments shown in the drawings. The same reference signs in the drawings refer to the same parts. Those skilled in the art should understand that the drawings are intended to illustrate the preferred embodiments of the present application, and have no limiting effect on the scope of the present application, and the various parts in the drawings are not drawn to scale.

[0031] In the drawings:

[0032] Figure 1 is a design schematic diagram of the Archimedes spiral air hole plate in the embodiment of the present application;

[0033] Figure 2 is a schematic diagram of the AA section in the present application; Figure 1

[0034] Figure 3 is a structural schematic diagram of the tobacco material air pipe falling transmission device based on the Archimedes spiral air hole in the embodiment of the present application;

[0035] Figure 4 is a schematic diagram of the air pipe falling device for conveying tobacco material and installing the Archimedes spiral air hole plate in the embodiment of the present application;

[0036] Figure 5 is a structural schematic diagram of the Archimedes spiral air hole, the air plate and the air pipe falling transmission of the tobacco material for conveying cut tobacco or tobacco sheet (for conveying cut tobacco in the cut tobacco process or conveying tobacco sheet in the re-drying process);

[0037] Figure 6 is a design schematic diagram of expanding the number of air holes on the Archimedes spiral (S=8mm) in the embodiment of the present application.

[0038] Figure 7 ​is a schematic diagram of a wind speed vector reference of an Archimedes spiral air hole plate wind field β = 45°

[0039] The corresponding names of the reference signs in the drawings are as follows: 1-input pipe, 2-negative pressure transmission pipe, 3-falling pipe, 4-valve, 41-spring piece, 5-Archimedes spiral air hole plate, 6-air hole, 7-air pipe, 8-air adjusting handle, 9-air door, 10-air door shaft. DETAILED DESCRIPTION

[0040] The above and other technical features and advantages of the present application will be more apparent from the following description in conjunction with the accompanying drawings. In the description of the present application, it will be understood that the terms "first", "second", etc., are used only for the purpose of description, and should not be construed as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, unless otherwise specifically limited.

[0041] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0043] To solve at least one aspect of the above problem, the embodiment provides a tobacco material air pipe falling transmission device based on air holes on an Archimedes spiral, which is characterized in that it comprises an input pipe 1, a negative pressure transmission pipe 2, a falling pipe 3 and an air pipe 7.

[0044] The input pipe 1, the falling pipe 3 and the negative pressure transmission pipe 2, and the air pipe 7 are "crossed" and intersected.

[0045] The bottom of the falling pipe 3 has a valve 4, and the joint between the falling pipe 3 and the valve 4 has a spring sheet 41;

[0046] The wind pipe 7 has an Archimedes spiral air hole plate 5, and the Archimedes spiral air hole plate 5 has air holes 6;

[0047] The wind pipe 7 has a damper 9, and the damper 9 is located on the side of the Archimedes spiral air hole plate 5 away from the negative pressure transmission pipe 2;

[0048] The tobacco material wind pipe falling material transmission method based on the air holes on the Archimedes spiral line uses the tobacco material wind pipe falling material transmission device based on the air holes on the Archimedes spiral line, which comprises the following steps: tobacco material is input by the input pipe 1, a part of the material falls into the falling pipe 3, when reaching a certain weight, the valve 4 controlled by the spring sheet 41 is released and automatically closed, and another part of the material enters the negative pressure transmission pipe 2 under the action of the wind of the Archimedes spiral air hole plate 5 and the wind pipe 7 to realize the transmission of the tobacco material. See the figures.

[0049] The Archimedes spiral air hole plate 5 is a circular plate with an outer diameter matching the inner diameter of the wind pipe 7, and the air holes 6 are through holes processed in the circular plate The center of the surface of the air hole 6 is on the Archimedes spiral, and the center of the surface of the circular plate is the origin of the coordinate system. The parameter equation of the Archimedes spiral is x=c+b·t·cos(2πt), y=c+b·t·sin(2πt), and the thickness h of the Archimedes spiral air hole plate 5 is greater than or equal to Value

[0050] Suppose the center (x0, y0) of the surface of the air hole 6 is on the Archimedes spiral, the tangent is P, the tangent plane is M and is perpendicular to the xoy plane, then the processing direction of the air hole 6 is along the tangent P vector direction, and in the tangent plane M, the tangent P forms an angle β, 30°≤β≤60°, and the angle β is preferably 45°.

[0051] The Archimedes spiral is a very important curve in nature and scientific theory, like the Fibonacci spiral. The Archimedes spiral has important applications in mechanical engineering, measurement and fluid mechanics. The technical solution only refers to some mathematical and physical characteristics thereof.

[0052] As Figures 1-2 described, the diameter of the circular plate in the embodiment is 200mm, a Cartesian coordinate system is established, c=0 and b=20mm, and the parameter equation of the Archimedes spiral in the embodiment is x=20t·cos(2πt), y=20t·sin(2πt).

[0053]

[0054] The distance between adjacent air holes 6 on the Archimedes curve is S=15mm, which can be completed by curve integration or CAD. In this embodiment, CAD modeling is used to complete it. In order to ensure that the "wind" flows in the direction of the tangent vector of the Archimedes spiral, the thickness h of the Archimedes spiral air hole plate 5 is greater than or equal to The value in this embodiment Therefore, h=6mm.

[0055] In mathematics, the center coordinates of the air hole 6 surface are (x0, y0), and the polar coordinates of the Archimedes spiral parameter equation are ρ=aθ. The tangent slope k of (x0, y0) can be solved. Then the Archimedes spiral Cartesian equation is:

[0056]

[0057] The first derivative is:

[0058]

[0059] The polar coordinates corresponding to (x0, y0) are:

[0060]

[0061] The tangent slope k of (x0, y0) is:

[0062]

[0063] For example, when θ0=π / 2, k=-2 / π.

[0064] Or for the polar equation of this embodiment ρ=aθ, θ=2πt, a=10θ / π.

[0065] When θ0=π / 2, t=1 / 4, and ρ=5mm, then the tangent point coordinates are:

[0066] x0=x(π / 20)=0

[0067] y0=y(π / 2)=ρπ / 2=5

[0068] The tangent equation of the tangent line P is: y-5=-2 / π·(x-0);

[0069] That is: -2x+πy-5π=0, obviously, the vector or direction cosine of the tangent line P in the tangent plane M can be easily solved. For example Figure 1 2 ​The machining direction of the air hole 6 is along the tangent P vector direction, and in the tangent plane and with the tangent P angle β, 30°≤β≤60°, and the β angle of the embodiment is preferably β=45°. According to the theory of physics, the Archimedean spiral air hole plate 5 will have no spiral effect when the angle β=90°, which is the same as the general air hole plate.

[0070] Therefore, it is important to manufacture the air hole 6 on the Archimedean spiral, and theoretically, the air hole 6 is manufactured consistently in the tangent vector direction of the Archimedean spiral, which will make the "wind" produce a spiral, but it is difficult to implement in practice. In this embodiment, the machining direction of the air hole 6 is along the tangent vector direction of the Archimedean spiral where the center of the circle is located, and the surface (i.e. XOY plane) is at an angle β. Theoretically, the smaller the angle β, the better the spiral effect of the "tornado" is produced. In this embodiment, the angle β is 45°, which is based on the difficulty of mechanical manufacturing.

[0071] The reason why the air hole on the Archimedean spiral can make the "wind" produce a spiral is that the tangent direction of the Archimedean spiral has the vector effect of the speed or force of air flow. Since the Archimedean spiral is a linear function of the radial radius changing with the angle, there is no spiral wind effect when β=90°. Therefore, as long as the orthogonal decomposition vector of the force or speed in the tangent direction of the Archimedean spiral is not zero, there will be a spiral effect, and the effect will be completed together with the air pipe 7.

[0072] If the material such as tobacco is to be transported in a straight line in the negative pressure conveying pipe 2 for a long distance, the "wind" needs to continue to strengthen the spiral wind effect in order to improve the flow of the material and reduce the crushing. The "rifling line" technology in the Chinese patent "Double-layered elbow pipe structure, pipe section and material conveying pipe (ZL202410559746.X)" needs to be used to continuously provide "wind power" in a spiral manner.

[0073] Theoretically, the air hole 6 is a cylindrical hole, and its machining direction is along the space vector direction. The direction cosine of the space vector is a key technical parameter of CAD / CAM, CNC machine tools and CMM measuring machines. The air hole 6 can be a circular hole, an elliptical hole or a kidney-shaped hole. In this embodiment, a circular hole is selected (such as Figure 2 Because 0°<β<90°, the machining direction of the air hole 6 is along the space vector direction, and the direction cosine of the space vector is a key technical parameter of CAD / CAM, CNC machine tools and CMM measuring machines. Figure 1 The surface of the air hole 6 in the above-mentioned Chinese patent is similar to an ellipse.

[0074] The distance between adjacent air holes 6 on the Archimedean curve is the same S. One method is to use CAD / CAM design, and another method is to use the polar coordinate arc length integral formula to calculate, wherein,

[0075] The distance between adjacent air holes 6 on the curve is S, and S=15mm is selected in this embodiment, which is completed by CAD design.

[0076] Another embodiment can also be completed using the polar coordinate arc length formula, as follows:

[0077] For ρ=aθ, polar coordinate arc length

[0078] so:

[0079]

[0080] but:

[0081]

[0082] Since this equation is a transcendental equation, given the distance S between adjacent pores 6 and a parameter such as θ1, it is difficult to solve for the second parameter such as θ2. Therefore, it is necessary to use Excel spreadsheets for programming calculation or other algorithm programs to optimize the calculation in order to ensure that S has good consistency.

[0083] The damper 9 is mounted on the damper shaft 10, and the air duct 7 has an air adjustment handle 8. The opening and closing size of the damper 9 is controlled by the air adjustment handle 8 through the damper shaft 10, thereby controlling the amount of air entering the Archimedes spiral vent plate 5 and the air duct 7.

[0084] This implementation example Figure 4 As the input pipe 1, negative pressure transmission pipe 2, and air duct 7 are all under negative pressure, the air intake ratio of input pipe 1 and air duct 6 is crucial for generating spiral air in air duct 7 using Archimedes spiral vent plate 5.

[0085] The ventilation area Q2 of the air inlet of the input pipe 1 and the ventilation area Q1 of all the vents 6 on the Archimedes spiral vent plate 5 are Q1>Q2, or Q1 / Q2>1.

[0086] The inlet diameter of the input duct 1 is too large, which obviously results in a poor spiral airflow effect within the duct 7. For example: Figure 1 In the middle, the Archimedes spiral vent plate 5 has 96 diameters The pore 6 has a diameter S = 15 mm, and its total through-hole area is:

[0087] Q1 = 96 × 3 × 3 × π = 864π (mm) 2 ).

[0088] If the diameter of the inlet pipe 1 is, for example, 200mm, then the area of ​​the through hole is:

[0089] Q2=100×100×π=10000π(mm 2 )

[0090] Q1 / Q2 = 0.0864

[0091] So, the spiral wind effect is a little less.

[0092] As Figure 6 In the middle, if the Archimedes spiral air hole plate 5 has 185 air holes with a diameter of S = 8mm, the input pipe 1 inlet pipe diameter is designed to be 80mm, then:

[0093] Through-hole area Q1 = 185x3x3xpi = 1665pi (mm 2 )

[0094] Through-hole area Q2 = 40x40xpi = 1600pi (mm 2 )

[0095] Obviously: Q1 / Q2 = 1.040 > 1, The spiral wind effect will be better, in addition, the input pipe 1 inlet pipe size should be combined with the characteristics of the material, and the Archimedes spiral air hole plate 5 should be combined with the manufacturing technology and cost.

[0096] For the tobacco or tobacco leaf conveying in the tobacco processing or reprocessing process (tobacco or tobacco leaf conveying device in the tobacco processing or reprocessing process), the falling pipe 3, spring sheet and valve 4 structure design are omitted.

[0097] For example Figure 5 , for the tobacco or tobacco leaf conveying in the tobacco processing or reprocessing process, because the size consistency of the tobacco or tobacco leaf is good, the loose is good and the quality is light, the Figure 5 design is selected, the falling pipe 3, spring sheet and valve 4 structure design are omitted, which is similar to the "three-way" design. The method for conveying tobacco or tobacco leaf in the tobacco processing or reprocessing process, using the device for conveying tobacco or tobacco leaf in the tobacco processing or reprocessing process, comprising: tobacco material is input by the input pipe 1, and the tobacco material is transmitted into the negative pressure transmission pipe 2 under the action of the air of the Archimedes spiral air hole plate 5 and the air pipe 7.

[0098] For example Figure 3 , for the tobacco stem screening and conveying of the stem line, the screened tobacco stem or small size tobacco stem is input into the input pipe 1 through the vibrating screen, because the physical properties of the tobacco stem, such as density and weight, are large, the hardness is high, the geometric size consistency is not high, the tobacco stem flow to the input pipe 1 fluctuates greatly, or there are other foreign matters, etc., so the Figure 3 design is selected, which is beneficial to the exclusion of the valve 4.

[0099] The above merely describes preferred embodiments of the present application, which are merely illustrative but not restrictive. The structure and connection mode of each component in the present application can be changed, and any equivalent transformation and improvement based on the technical scheme of the present application should not be excluded from the protection scope of the present application.

Claims

1. A tobacco material conveying device based on air holes along an Archimedes' spiral, characterized in that, It includes an input pipe (1), a negative pressure transmission pipe (2), a drop pipe (3), and an air duct (7); The input pipe (1), the drop pipe (3), the negative pressure transmission pipe (2), and the air duct (7) intersect in a "cross" shape; The bottom of the drop tube (3) has a valve (4), and a spring plate (41) is provided at the connection between the drop tube (3) and the valve (4). The air duct (7) has an Archimedes spiral perforated plate (5) inside, and the Archimedes spiral perforated plate (5) has vents (6). The air duct (7) has an air damper (9) located on the side of the Archimedes spiral vent plate (5) away from the negative pressure transmission pipe (2); Wherein, the Archimedean spiral vent plate (5) is a circular plate with an outer diameter matching the inner diameter of the air duct (7), and the vent (6) is a through hole ¢D machined on the circular plate. The center of the surface of the vent (6) is on the Archimedean spiral. With the center of the surface of the circular plate as the origin of the coordinate system, the parametric equation of the Archimedean spiral is: , The thickness h of the Archimedes spiral perforated plate (5) is greater than or equal to the value of ¢D.

2. The tobacco material conveying device based on air holes on an Archimedean spiral according to claim 1, characterized in that, it is provided with The center of the surface of the pore (6) On the Archimedean spiral, its tangent is P, and the tangent plane is M, which is perpendicular to the xoy plane. Then the processing direction of the pore (6) is along the vector direction of the tangent P, and it forms an angle with the tangent P in the tangent plane M. horn, .

3. The tobacco material conveying device based on air holes on an Archimedean spiral according to claim 2, characterized in that, The distance between adjacent pores (6) on the Archimedes curve is the same, S, where, .

4. The tobacco material conveying device based on air holes on an Archimedean spiral according to claim 2, characterized in that, Establish a Cartesian coordinate system, let , The implemented Archimedean spiral parametric equation is: ； or polar coordinate equation , , .

5. The tobacco material conveying device based on air holes on an Archimedean spiral according to claim 1, characterized in that, The damper (9) is mounted on the damper shaft (10), and the air duct (7) has an air adjustment handle (8). The air adjustment handle (8) is used to control the opening and closing of the damper (9) through the damper shaft (10), thereby controlling the amount of air entering the Archimedes spiral vent plate (5) and the air duct (7).

6. The tobacco material conveying device based on air holes on an Archimedean spiral according to claim 1, characterized in that, The pores (6) are round, elliptical, or kidney-shaped.

7. The tobacco material conveying device based on air holes on an Archimedean spiral according to claim 1, characterized in that, The inlet diameter and ventilation area of ​​the input pipe (1) The ventilation area of ​​all the pores (6) on the Archimedes spiral vent plate (5) The relationship between the two is as follows: ,or .

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