Tobacco lamina classifying, orthogonal screening and large tobacco lamina slitting device and method suitable for medium and thin cigarette primary processing

Abstract

The invention discloses a device and a method for classifying, orthogonally screening and slitting large tobacco lamina suitable for medium and thin cigarette primary processing. The device comprises an input line, a two-stage vibrating screen, a two-stage screen plate, a conveying plate, a slitting unit, a blanking groove and a conveying line, re-dried tobacco strips are input into the first-stage vibrating screen through the input line, large and medium tobacco strips are screened through the # imgabs 0 # screening holes, medium tobacco strips are input into the conveying line through the blanking groove, the large tobacco strips are input into the slitting device to be slit in the size of 25.4 mm and then input into the second-stage vibrating screen again, and the large and medium tobacco strips are screened through the # imgabs 1 # screening holes and slit in the size of 25.4 mm and then conveyed to the conveying line through the blanking groove. The two-stage sieve plate adopts a first trajectory equation y = 10cos (x / lambda2 * 2pi) and a wavelength lambda2 = 62.832 mm, and adopts a second trajectory equation y = 10cos (z / lambda1 * 2pi) and a wavelength lambda1 = 125.664 mm to design a space orthogonal screening surface. According to the method, re-dried tobacco strips are classified, large tobacco strips are precisely cut, cut tobacco production or a threshing and re-drying line can be connected, the cut tobacco filament rate is finally reduced, and the quality of medium and fine cigarettes is improved.

Description

Technical Field

[0001] The present invention belongs to the field of tobacco, relates to tobacco leaf raw material processing technology and cigarette production technology, and is applied to online tobacco strip classification and cutting in a silk production or redrying production line, and is particularly suitable for a silk production line for medium and thin cigarettes. Specifically, it relates to a tobacco strip classification, orthogonal screening and large-strip cigarette cutting device and method suitable for the silk production of medium and thin cigarettes. Background Art

[0002] Separating the stems from the tobacco leaves on the threshing and redrying production line is particularly important for controlling the size of the tobacco flakes after threshing, which is generally controlled by rollers and frames; threshing and redrying adopts multi-stage threshing and multi-stage wind separation. The larger the size of the tobacco flakes produced, the smaller the breakage and the lower the fragments and dust, and vice versa. Generally speaking, tobacco flakes larger than 25.4mm square are called large flakes, and tobacco flakes larger than 12.5mm and smaller than 25.4mm square are called medium flakes. In the redrying of finished tobacco flakes, if the medium flake rate is increased and the large flake rate is reduced, the flake breakage rate will increase.

[0003] The tobacco flakes entering the shred process often contain a high content of large flakes, and obviously, the shred rate of long filaments is also high. Due to the high shred rate of tobacco flakes transported over long distances to the cigarette making process, the entanglement and clumping of tobacco flakes during pneumatic conveying, etc., the cigarette making process will frequently produce product quality defects such as loose cigarettes and empty ends. It is not easy to solve this problem by relying on the functions of the cigarette making machine, such as adjusting the cutting disk and the suction ribbon, especially for medium and thin cigarettes, there will be more quality defects in cigarette products.

[0004] Research and application have shown that the high rate of long tobacco is the main factor. Therefore, in the redrying process, if the rate of medium-sized slices can be increased, or "increasing the medium and reducing the large", the rate of long tobacco in the silk-making process can be effectively controlled, and the structure of the tobacco slices for medium and thin cigarettes will be improved, which is conducive to improving the quality of cigarettes. Obviously, it is difficult to achieve good results by controlling the size of the tobacco slices after leaf threshing in the redrying production only by controlling the size of the rollers and frames of the leaf threshing machine. Therefore, in the redrying process, a precise screening process for large and medium slices should also be designed to improve size consistency, etc.

[0005] In fact, with current general technology, it is difficult to achieve screening of large and medium-sized flakes in re-roasted tobacco flakes. The difficulty lies in the physical characteristics of re-roasted tobacco flakes, such as plasticity, size variability, mutual clamping, wrapping or adsorption of tobacco flakes, light weight and no significant difference, etc. In particular, the tobacco flakes at the outlet of the leaf beating unit are stuck together or agglomerated, making it difficult to achieve loose and uniform distribution, let alone classification.

[0006] After scientific research by the applicant, a sine basis function was adopted and two cosine curves were used to "orthogonally" design a conveying screening plate. The sinusoidal wave surface can provide the most efficient loosening effect on the tobacco sheets, and can make large tobacco sheets flow along the wave crest or between the two wave surfaces, and make small-sized tobacco sheets be conveyed along the sine curve in the trough. By designing 1-inch screening holes on the trough line, medium-sized tobacco sheets can be effectively separated. The classified large tobacco sheets are then cut by a disc cutter, so that the tobacco sheets entering the silk-making process have a high medium-sized sheet rate, which can effectively avoid the long-filament rate in the silk-making link, and meet the stringent process requirements of medium and thin cigarettes on the tobacco structure. It has broad application prospects for cigarette rolling technology and improving cigarette quality.

[0007] The present invention is proposed to solve the above-mentioned problems. Summary of the invention

[0008] In order to solve at least one aspect of the above problems, the present invention discloses a device and method for classifying tobacco strips, orthogonally screening and cutting large tobacco strips suitable for making medium and thin cigarettes, comprising an input line, a two-stage vibrating screen, a two-stage sieve plate, sieve holes, a conveying plate, a cutting device, an anvil, a material drop chute, a conveying line, a hand wheel, a dovetail groove adjustment frame, a frequency conversion motor, etc.; the redried tobacco strips are input from the input line to the first-stage vibrating screen, and the second-stage vibrating screen is used to cut the tobacco strips. The screening holes complete the screening of large and medium-sized cigarettes. The medium-sized cigarettes are fed into the conveyor line through the blanking chute. The large-sized cigarettes are fed into the cutting device to complete the 25.4mm size cutting and then fed into the secondary vibration screen again. After the screening holes complete the screening of large and medium-sized cigarettes and the 25.4mm size cutting, they are transported to the conveyor line through the blanking chute; the two-stage screen plate adopts the first trajectory equation of y=10cos(x / λ 2 ×2π), wavelength λ 2 = 62.832 mm and the second trajectory equation is y = 10cos(z / λ 1 ×2π), wavelength λ 1 =125.664mm design space orthogonal screening surface, the screening hole is made on the curve y=10cos(x / λ 2 ×2π) trough, and along the curve y=10cos(z / λ 1 ×2π) wavelength λ 1 5 are evenly distributed inside; the present invention implements the classification of re-baked tobacco sheets and accurately cuts large tobacco sheets, which can be connected to the silk production or leaf beating and re-baking line, and ultimately reduce the long-filament rate of tobacco shreds and improve the quality of medium and thin cigarettes.

[0009] The technical solution of the present invention is as follows:

[0010] The present invention provides a tobacco strip classification, orthogonal screening and large tobacco strip cutting device suitable for making medium and thin cigarettes, which comprises an input line 1, a primary vibrating screen 2, a first material drop chute 7, a first conveying plate 5, a first cutting unit 6, a secondary vibrating screen 8, a second material drop chute 19, a second conveying plate 11, a second cutting unit 12, a third material drop chute 14, and a conveying line 15;

[0011] The primary vibrating screen 2 comprises a primary sieve plate 3, and the primary sieve plate 3 has a first sieve hole 4.

[0012] The secondary vibrating screen 8 comprises a secondary sieve plate 9, and the secondary sieve plate 9 has a second sieve hole 10.

[0013] The screening surfaces of the primary screen plate 3 and the secondary screen plate 9 are spatial curved surfaces. A three-dimensional spatial coordinate system is established on mutually perpendicular planes. The mathematical function of the spatial curved surface of the screening surface is y=f(x,z), and the equation of the first trajectory is y=10cos(x / λ 2 ×2π), wavelength λ 2 =62.832mm, wave height 20mm, the second trajectory equation is y=10cos(z / λ 1 ×2π), wavelength λ 1 =125.664mm, wave height 20mm, the x direction along the first track is the width direction of the screen plate, and the z direction along the second track is the length direction of the screen plate, that is, the screening and conveying direction of the tobacco material.

[0014] Preferably, the cosine curve y=10cos(x / λ) in the first trajectory 2 ×2π) trough point, and according to the cosine curve y=10cos(z / λ 1 ×2π) to make sieve holes, at 1 wavelength λ 1 = 125.664mm, 5 sieve holes are evenly distributed, with a hole diameter of The processing direction of the sieve hole is based on the cosine curve y=10cos(z / λ 1 ×2π), that is, the processing directions of the sieve holes on the crest and trough are parallel to each other and perpendicular to the xoz plane. The processing direction of the sieve holes on the wave surface has an angle with the z axis, and its normal vector is y=10cos(z / λ 1 ×2π).

[0015] Preferably, the length dimension of the primary sieve plate 3 is greater than or equal to the length dimension of the secondary sieve plate 9 .

[0016] Preferably, the first slitting unit 6 and the second slitting unit 12 both include a handwheel 16, a dovetail groove adjustment frame 17, a frequency conversion motor 18, a disc cutter 61, a sleeve rake wheel 62, and an anvil 13. The dovetail groove adjustment frame 17 includes a convex dovetail groove 64 and a concave dovetail groove 69 that are matched with each other. The convex dovetail groove 64 can be precisely adjusted to rise and fall by the handwheel 16, thereby adjusting the gap of the arc groove 63 between the disc cutter 61 and the anvil 13.

[0017] Preferably, a bearing sleeve 91, a bearing 92, a rotating shaft 90 and a bearing end cover 93 are installed on the movable convex dovetail groove 64;

[0018] The disc cutter 61 and the sleeve rake wheel 62 are sequentially mounted on the rotating shaft 90, and the variable frequency motor 18 is mounted through a keyway 94 and a coupling to drive the disc cutter 61 to rotate and cut the tobacco.

[0019] Preferably, the sleeve rake wheel 62 includes a rake wheel arc 62 - 1 and a rake wheel groove 62 - 2 , and the raking and pressing of the tobacco sheets are completed by the rake wheel arc 62 - 1 and the rake wheel groove 62 - 2 on the sleeve rake wheel 62 .

[0020] Preferably, the dovetail groove adjustment frame 17 is stabilized by an adjustment hand wheel 67 and a clamping screw 70;

[0021] The dovetail groove adjustment frame 17 of the dovetail groove mechanism is installed using the mounting screws 65;

[0022] The anvil plate 13 is mounted with screws using the countersunk holes 66 .

[0023] Preferably, the optimal gap between the disc cutter 61 and the anvil 13 of the arc groove 63 is 1 to 2 mm, so as to improve the tobacco sheet cutting effect;

[0024] The spacing T between any adjacent disc cutters 61 is 25.4 mm (equal to value).

[0025] Preferably, the dovetail angles of the convex dovetail groove 64 and the concave dovetail groove 69 are 55°.

[0026] The second aspect of the present invention provides a method for classifying tobacco strips, orthogonally screening and cutting large tobacco strips suitable for making medium and thin cigarettes, using the device for classifying tobacco strips, orthogonally screening and cutting large tobacco strips suitable for making medium and thin cigarettes according to the first aspect of the present invention, which comprises: the redried tobacco strips are input from the input line 1 to the primary vibrating screen 2, and the primary screen plate 3 and the first screen hole 4 ( ) to complete the screening and classification of large and medium-sized cigarettes. The medium-sized cigarettes are input to the conveying line 15 through the first blanking chute 7, and the large-sized cigarettes are input to the first cutting unit 6 through the first conveying plate 5 to complete the cutting of 25.4 mm in size, and then input to the secondary vibration screen 8 again, and the secondary screen plate 9 and the second screening hole 10 ( ) After the screening and classification of large and medium-sized cigarettes are completed, the medium-sized cigarettes are input to the conveyor line 15 through the second blanking chute 19, and the large-sized cigarettes are input to the second cutting unit 12 through the second conveying plate 11 again to complete the cutting to 25.4 mm size, and then are transported to the conveyor line 15 through the third blanking chute 14.

[0027] The device and method for classifying tobacco strips, orthogonally screening, and cutting large tobacco strips suitable for making medium and thin cigarettes according to the embodiment of the present invention have the following beneficial effects:

[0028] 1) Solve common technical problems

[0029] Due to the physical and chemical characteristics of tobacco flakes, such as easy adhesion, mutual clamping and wrapping, agglomeration, etc., and large flow rate, it is difficult to use a plane vibration screen to achieve loose and uniform distribution, whether in the leaf threshing and re-baking production line or in the production line after the moisture recovery process of the silk making process line, and the effect is not good. 2 ×2π), wavelength λ 2 = 62.832mm, wave height 20mm, its wave crest and wave trough have a highly effective loosening and uniform distribution effect on the agglomeration of tobacco sheets, and then using the cosine curve y = 10cos (z / λ 1 ×2π), wavelength λ 1 =125.664mm, wave height 20mm and the first trajectory uses the cosine curve y=10cos(x / λ 2 ×2π) orthogonal design, such a sieve plate, at 1λ 1 The maximum theoretical height difference can reach 40mm, which further improves the loosening and uniform distribution efficiency of tobacco sheets. Therefore, by optimizing the frequency and amplitude of the sine basis function, a series of technical problems of loose tobacco materials in the tobacco industry can be effectively solved.

[0030] 2) Solve key technical problems

[0031] Multi-stage threshing and multi-stage wind separation complete the separation of tobacco stems and leaves, and the control of tobacco flake size by rollers and frames is a key process in the redrying process. Obviously, fine classification of tobacco flakes by size is a key technology, and it is difficult to balance high flake rate and low crushing rate. The orthogonal screening technology of this technical solution provides a better solution. In this technical solution, theoretically, the tobacco flake size is greater than λ 1 ×λ 2(125.664×62.832mm) square will be transmitted on the wave crest by vibrating screen, while smaller than that will be transmitted within the two wave planes or in the trough. 2 =62.832mm, if the size of the cigarette is less than 25.4mm square, it will be Screen hole separation. For the redrying process, the medium-sized tobacco leaves are separated and classified to avoid entering the next level of leaf threshing process, which can effectively avoid the crushing of small and medium-sized tobacco leaves, improve the process effect, and effectively reduce the cost of tobacco leaf raw materials.

[0032] For the tobacco leaf making process, especially for the tobacco leaf making process of medium and thin cigarettes, the classification of tobacco leaf sizes is particularly strict, and this technical solution provides the best solution. The sieve hole is designed on the cosine curve y = 10cos(z / λ 1 ×2π), and on the cosine curve y=10cos(x / λ 2 ×2π) trough line, therefore, its screening efficiency and screening rate are the highest, which is better than the currently used plane vibration screen, especially: The size of the sieve holes can be further adjusted according to the requirements of the cigarette production process.

[0033] 3) Solve the problem of accurate cutting of tobacco slices

[0034] In order to solve the quality problems of large pieces of cigarettes, such as long tobacco shreds produced in the shredding process, which lead to loose cigarettes, this technical solution provides two-stage screening and two-stage cutting, the purpose of which is to screen out large pieces of cigarettes and complete their cutting, and avoid cutting small and medium pieces of cigarettes and causing more cigarette pieces to be broken. This cutting device has high accuracy because the cutting size is determined by the spacing between adjacent disc cutters, that is, The value is 25.4mm, and this size is determined by the axial size of the sleeve rake wheel and is adjustable and designable, so accuracy can be ensured; the sleeve rake wheel is designed with a rake wheel arc and a rake wheel groove to complete the raking and compacting of the tobacco leaves, and the disc cutter can be made of high-speed steel W18Cr4V, and a chopping board with an arc groove is designed under the disc cutter. Therefore, the breakage rate of tobacco leaves during cutting is lower.

[0035] A dovetail groove adjustment frame is also designed. The design and manufacturing of its dovetail groove guide rail follows the machine standard JB / ZQ4241-1997. The material is HT200, which is scraped and ground. The guide rail accuracy can reach micron level, which improves its slitting accuracy and stability.

[0036] Since the orthogonal screening and precision slitting technologies in this technical solution are important and critical in the tobacco processing industry, they will promote the development of tobacco machine equipment technology in the tobacco industry. Similarly, they will also have promotion value in other industrial application fields such as food, medicine, and mining. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to better understand the above and other purposes, features, advantages and functions of the present invention, reference may be made to the embodiments shown in the accompanying drawings. The same reference numerals in the accompanying drawings refer to the same components. It should be understood by those skilled in the art that the accompanying drawings are intended to schematically illustrate the preferred embodiments of the present invention and have no limiting effect on the scope of the present invention, and the components in the drawings are not drawn to scale.

[0038] In the attached picture:

[0039] Figure 1 It is a schematic diagram of the structure of the device for classifying tobacco strips, orthogonally screening and cutting large tobacco strips suitable for making medium and thin cigarettes;

[0040] Figure 2 A schematic diagram of the marking of the primary sieve plate and the secondary sieve plate in a three-dimensional coordinate system in an embodiment of the present invention;

[0041] Figure 3 Schematic diagram of the length, width and screening hole design of the primary sieve plate and the secondary sieve plate in an embodiment of the present invention;

[0042] Figure 4 For the present invention Figure 3 The cross-sectional view in the figure shows the normal marking schematic diagram representing the machining direction of the sieve hole;

[0043] Figure 5 It is a schematic diagram of the slitting principle and the dovetail groove installation and adjustment principle of the precise dovetail groove adjustment frame in the embodiment of the present invention;

[0044] Figure 6 It is a schematic diagram of the assembly principle of the bearing, disc cutter, sleeve rake wheel and cutting board attached to the rotating shaft of the embodiment of the present invention;

[0045] Figure 7 It is a control diagram of the size of the cut smoke or a schematic diagram of the size design of the disc cutter and the sleeve rake wheel according to an embodiment of the present invention;

[0046] Figure 8 Schematic diagram of the design of the sleeve harrow wheel according to an embodiment of the present invention;

[0047] Fig. 9 is a schematic diagram of a cutting board design according to an embodiment of the present invention;

[0048] Fig.10 It is a schematic diagram of the principle of adjusting the position and size of the disc-shaped cutting knife and the cutting board according to an embodiment of the present invention.

[0049] The names corresponding to the reference numerals in the accompanying drawings are: 1, input line; 2, primary vibrating screen; 3, primary sieve plate; 4, first screening hole; 5, first conveying plate; 6, first slitting unit; 7, first blanking chute; 8, secondary vibrating screen; 9, secondary sieve plate; 10, second screening hole; 11, second conveying plate; 12, second slitting unit; 13, anvil; 14, third blanking chute; 15, conveying line; 16, hand wheel; 17, dovetail groove adjustment frame; 18, variable frequency motor; 19, second blanking chute;

[0050] 61. Disc cutter; 62. Sleeve rake wheel; 62-1. Rake wheel arc; 62-2. Rake wheel groove; 63. Arc groove; 64. Convex dovetail groove; 65. Mounting screw; 66. Countersunk hole; 67. Adjusting hand wheel; 68. Fastening screw; 69. Concave dovetail groove; 70. Pressing screw;

[0051] 90. Rotating shaft; 91. Bearing sleeve; 92. Bearing; 93. Bearing end cover; 94. Keyway. DETAILED DESCRIPTION

[0052] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings. In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, unless otherwise clearly and specifically defined.

[0053] In the present invention, unless otherwise clearly defined and specified, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "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 higher in level than the second feature. A first feature being "below", "below" or "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 lower in level than the second feature.

[0055] like Figure 1 To solve at least one aspect of the above problems, the present invention provides a device and method for classifying tobacco strips, orthogonal screening and cutting large tobacco strips suitable for making medium and thin cigarettes, and a device for classifying tobacco strips, orthogonal screening and cutting large tobacco strips suitable for making medium and thin cigarettes, comprising an input line 1, a primary vibrating screen 2, a first material drop chute 7, a first conveying plate 5, a first cutting unit 6, a secondary vibrating screen 8, a second material drop chute 19, a second conveying plate 11, a second cutting unit 12, a third material drop chute 14, and a conveying line 15;

[0056] The primary vibrating screen 2 comprises a primary sieve plate 3, and the primary sieve plate 3 has a first sieve hole 4.

[0057] The secondary vibrating screen 8 includes a secondary sieve plate 9 , and the secondary sieve plate 9 has second sieve holes 10 .

[0058] The method for classifying tobacco strips, orthogonal screening and cutting large tobacco strips suitable for making medium and thin cigarettes is used. The device for classifying tobacco strips, orthogonal screening and cutting large tobacco strips suitable for making medium and thin cigarettes is used, which comprises: the redried tobacco strips are input from the input line 1 to the first-level vibrating screen 2, and the first-level screen plate 3 and the first screen hole are used to separate the tobacco strips. After the screening and classification of large and medium-sized cigarettes are completed, the medium-sized cigarettes are input to the conveyor line 15 through the first blanking chute 7, and the large-sized cigarettes are input to the first cutting unit 6 through the first conveying plate 5 to complete the cutting of 25.4 mm size, and then input to the secondary vibration screen 8 again, and the secondary screen plate 9 and the second screen hole After the screening and classification of large and medium-sized cigarettes are completed, the medium-sized cigarettes are input to the conveyor line 15 through the second blanking chute 19, and the large-sized cigarettes are input to the second cutting unit 12 through the second conveying plate 11 again. After the cigarettes are cut to a size of 25.4 mm, they are transported to the conveyor line 15 through the third blanking chute 14.

[0059] like Figure 2 The screening surface of the primary screen plate 3 and the secondary screen plate 9 is a spatial curved surface. The mathematical function of the spatial curved surface of the screening surface is y=f(x,z), and the equation of the first trajectory is y=10cos(x / λ 2 ×2π), wavelength λ 2 =62.832mm, wave height 20mm, the second trajectory equation is y=10cos(z / λ 1 ×2π), wavelength λ 1 =125.664mm, wave height 20mm, the x direction along the first track is the width direction of the screen plate, and the z direction along the second track is the length direction of the screen plate, that is, the screening and conveying direction of the tobacco material.

[0060] like Figures 2 to 4 State.

[0061] In the first trajectory, the cosine curve y=10cos(x / λ 2 ×2π) trough point, and according to the cosine curve y=10cos(z / λ 1 ×2π) to make sieve holes, at 1 wavelength λ 1 = 125.664mm, 5 sieve holes are evenly distributed, with a hole diameter of The processing direction of the sieve hole is based on the cosine curve y=10cos(z / λ 1 ×2π), that is, the processing directions of the sieve holes on the wave crest and trough are parallel to each other and perpendicular to the xoz plane. The processing direction of the sieve holes on the wave surface has an angle with the z axis, and its normal vector is y=10cos(z / λ 1 ×2π).

[0062] Example Figure 3 In the figure, the first-stage sieve plate 3 and the second-stage sieve plate 9 are designed with a width B=840.05 mm and a length L1=1319.47 mm.

[0063] At a wavelength of 1 λ 1 = On the trough line within 125.66mm, the average interpolation method is used to process 5 first sieve holes 3 and second sieve holes 9, the aperture Process along the normal vector direction of the trough line according to the coordinate position of each hole. The coordinate position of each hole is:

[0064]

[0065] In the formula, x 0 、z 0 Indicates the starting hole 0 position;

[0066] n represents y=10cos(x / λ 2 ×2π), k represents y=10cos(z / λ 1 ×2π) curve.

[0067] Reference Example Figure 2 Middle: Starting hole 0 position, x 0 =λ 1 / 2=62.832 / 2=31.416mm,z 0 =λ 2 / 4=125.664 / 4=31.416mm.

[0068] If we calculate the x-axis to y=10cos(x / λ 2 ×2π), the n=5th trough line, the k=11th trough line at y=10cos(z / λ 1 ×2π) curve, the coordinates are:

[0069]

[0070] See also Figure 2 , 4 described.

[0071] The first sieve hole 4 on the trough line in three-dimensional space is punched with normal vectors. 1 ×2π) In the coordinate system yoz, the component of the normal vector on the x-axis is 0. The following is calculated in the coordinate system yoz:

[0072] y=10cos(z / λ 1 ×2π) to obtain:

[0073]

[0074] is the slope of the tangent line P of the curve passing through the coordinate point z, then the slope of the normal line N at the coordinate point z is:

[0075] N=-1 / y

[0076] Then the vector of the normal line N can be found.

[0077] Figure 4 In the figure, N1 is the normal line of the sieve hole position on the trough hole, and P is the tangent line at that position; N2 is the normal line of the sieve hole position on the crest; N3, P3, N4, and P4 are the normal line and tangent line of the sieve hole position on the wave surface, respectively.

[0078] Calculating the normal vector (or direction cosine) of a point on a curved surface is a basic technology for NC machine tool manufacturing or precision testing technology. In CNC numerical control, it can control the movement direction of the tool or the coordinate measuring machine probe.

[0079] The length dimension of the primary sieve plate 3 is greater than or equal to the length dimension of the secondary sieve plate 9 .

[0080] Since the middle-sized cigarettes are separated on the first-stage vibrating screen 2, the flow rate of the cigarette material is greater than that of the second-stage vibrating screen 8. Therefore, the length of the first-stage sieve plate 3 is greater than or equal to the length of the second-stage sieve plate 9. In this embodiment, the lengths of the two-stage vibrating screens are both L1.

[0081] Since the tobacco flake flow rate can reach 10 t / h in normal tobacco production, the length of the vibrating screen can be lengthened, and the frequency conversion motor 18 can also be used to improve the tobacco flake cutting efficiency.

[0082] like Figure 5The first slitting unit 6 and the second slitting unit 12 both include a hand wheel 16, a dovetail groove adjustment frame 17, a variable frequency motor 18, a disc cutter 61, a sleeve rake wheel 62, and an anvil 13. The dovetail groove adjustment frame 17 includes a convex dovetail groove 64 and a concave dovetail groove 69 that match each other. The hand wheel 16 is used to precisely adjust the lifting dimension h of the convex dovetail groove 64, such as Fig.10 As described above, the disc cutter 61 and the arc groove 63 on the anvil 13 have an optimal gap, such as 1 to 2 mm, so as to improve the tobacco cutting effect. The stability of the dovetail groove adjustment frame 17 is completed by adjusting the hand wheel 67 and the clamping screw 70; the spacing T between any adjacent disc cutters 61 is 25.4 mm (equal to value), such as Figure 7 State.

[0083] like Figure 6 As described above, the disc cutter 61 and the sleeve rake wheel 62 are sequentially mounted on the rotating shaft 90, and the variable frequency motor 18 is mounted through the keyway 94 and the coupling to drive the disc cutter 61 to rotate and cut the tobacco into slices. The raking and pressing of the tobacco slices are completed by the rake wheel arc 62-1 and the rake wheel groove 62-2 on the sleeve rake wheel 62.

[0084] like Figures 5-6 As described above, a bearing sleeve 91, a bearing 92, a rotating shaft 90 and a bearing end cover 93 are installed on the movable convex dovetail groove 64.

[0085] Specifically, the convex dovetail groove 64 and the concave dovetail groove 69 mechanism have a dovetail angle of 55°, the dovetail groove guide rail is designed and manufactured in accordance with the machine standard JB / ZQ4241-1997, the material selected is HT200, scraping is used to improve the guide rail accuracy, and a clamping screw 70 is designed for tightening; the dovetail groove mechanism is installed using the mounting screw 65; the anvil 13 is installed with screws using the countersunk hole 66; the adjusting hand wheel 67 is loosened, and the dovetail groove is precisely adjusted using the hand wheel 16 to allow the disc cutter 61 to complete the lifting and lowering, and then tightened.

[0086] like Figure 7 The cutting dimension T is 25.4 mm, which is designed according to the thickness dimension of the disc cutter 61 and the dimension of the sleeve rake wheel 62 in the length direction, and is assembled on the rotating shaft 90 in sequence.

[0087] like Figure 8 The sleeve rake wheel is designed as an integrated whole. In order to realize the raking and compaction of the tobacco sheets, the arc 62-1 and the rake wheel groove 62-2 are designed to improve the slitting effect.

[0088] like Fig. 9 The arc groove 63 is designed on the cutting board 13 to improve the slitting effect and facilitate the adjustment of the distance between the cutting board 13 and the disc-shaped cutting knife 61.

[0089] Obviously, the surfaces of the primary screen plate 3 and the secondary screen plate 9 are spatial curved surfaces formed by orthogonal intersection of two cosine curves. Since the spatial waveform surface has an array of alternating crests and troughs, it is a more classic orthogonal screening, and the screening holes are designed on the trough line, which also has an array of spatial alternation. Therefore, it can effectively solve the agglomeration and adhesion of tobacco sheet materials online, match the simple harmonic vibration amplitude and frequency of the vibration trough, and has high screening efficiency. Due to the effect of the sine wave, it also has a better uniform distribution function of tobacco sheet materials.

[0090] Since the technical solution adopts the sine basis function in the orthogonal system to design the conveying and screening surface, according to the curve surface integral theory, the effective area of ​​the screening surface of the conveying and screening plate is much larger than that of the flat plate with the same length and width. According to the mechanical theory and the normal characteristics of the surface, the orthogonal space surface has high efficiency for loose materials and has low crushing characteristics.

[0091] The above are only preferred embodiments of the present invention, which are only illustrative and not restrictive. The structures and connection modes of the components in the present invention can be changed, and any equivalent transformations and improvements based on the technical solution of the present invention should not be excluded from the protection scope of the present invention.

Claims

1. A device for classifying tobacco strips, orthogonally screening and cutting large tobacco strips suitable for making medium and thin cigarettes, characterized in that: It comprises an input line (1), a primary vibrating screen (2), a first material drop chute (7), a first conveying plate (5), a first slitting unit (6), a secondary vibrating screen (8), a second material drop chute (19), a second conveying plate (11), a second slitting unit (12), a third material drop chute (14), and a conveying line (15); The primary vibrating screen (2) comprises a primary sieve plate (3), wherein the primary sieve plate (3) has a first sieve hole (4). The secondary vibrating screen (8) comprises a secondary sieve plate (9), and the secondary sieve plate (9) has a second sieve hole (10). The screening surfaces of the primary screen plate (3) and the secondary screen plate (9) are spatial curved surfaces, which are constructed by establishing a three-dimensional spatial coordinate system on mutually perpendicular and orthogonal planes. The mathematical function of the spatial curved surface of the screening surface is y=f(x,z), the equation of the first trajectory is y=10cos(x / λ2×2π), the wavelength λ2=62.832mm, and the wave height is 20mm, and the equation of the second trajectory is y=10cos(z / λ1×2π), the wavelength λ1=125.664mm, and the wave height is 20mm. The x direction along the first trajectory is the width direction of the screen plate, and the z direction along the second trajectory is the length direction of the screen plate, that is, the screening and conveying direction of the tobacco material.

2. The device for classifying tobacco strips, orthogonally screening and cutting large tobacco strips suitable for making medium and thin cigarettes according to claim 1, characterized in that: At the trough point of the cosine curve y=10cos(x / λ2×2π) of the first trajectory, sieve holes are manufactured according to the cosine curve y=10cos(z / λ1×2π), and 5 sieve holes are evenly distributed within 1 wavelength λ1=125.664mm. The aperture is φD=25.4mm, and the processing direction of the sieve holes is manufactured according to the normal of the cosine curve y=10cos(z / λ1×2π), that is, the processing directions of the sieve holes on the crest and trough are parallel to each other and perpendicular to the xoz plane. The processing direction of the sieve holes on the wave surface has an angle with the z-axis, and its normal vector is calculated by the first-order derivative of y=10cos(z / λ1×2π).

3. The device for classifying tobacco strips, orthogonally screening and cutting large tobacco strips suitable for making medium and thin cigarettes according to claim 1, characterized in that: The length dimension of the primary sieve plate (3) is greater than or equal to the length dimension of the secondary sieve plate (9).

4. The device for classifying tobacco strips, orthogonally screening and cutting large tobacco strips suitable for making medium and thin cigarettes according to claim 1, characterized in that: The first slitting unit (6) and the second slitting unit (12) both comprise a hand wheel (16), a dovetail groove adjustment frame (17), a variable frequency motor (18), a disc cutter (61), a sleeve rake wheel (62), and an anvil (13); the dovetail groove adjustment frame (17) comprises a convex dovetail groove (64) and a concave dovetail groove (69) that are matched with each other; the convex dovetail groove (64) is adjusted to rise or fall by the hand wheel (16), thereby adjusting the gap of the arc groove (63) between the disc cutter (61) and the anvil (13).

5. The device for classifying tobacco strips, orthogonally screening and cutting large tobacco strips suitable for making medium and thin cigarettes according to claim 4, characterized in that: A bearing sleeve (91), a bearing (92), a rotating shaft (90) and a bearing end cover (93) are mounted on the movable convex dovetail groove (64); The disc cutter (61) and the sleeve rake wheel (62) are sequentially mounted on the rotating shaft (90), and the variable frequency motor (18) is mounted via a keyway (94) and a coupling to drive the disc cutter (61) to rotate and cut the tobacco.

6. The device for classifying tobacco strips, orthogonally screening and cutting large tobacco strips suitable for making medium and thin cigarettes according to claim 5, characterized in that: The sleeve rake wheel (62) comprises a rake wheel arc (62-1) and a rake wheel groove (62-2), and the raking and pressing of tobacco sheets are completed by the rake wheel arc (62-1) and the rake wheel groove (62-2) on the sleeve rake wheel (62).

7. The device for classifying tobacco strips, orthogonally screening and cutting large tobacco strips suitable for making medium and thin cigarettes according to claim 6, characterized in that: The dovetail groove adjustment frame (17) is stabilized by an adjustment hand wheel (67) and a clamping screw (70); The dovetail groove adjustment frame (17) of the dovetail groove mechanism is installed using a mounting screw (65); The anvil plate (13) is mounted with screws using the countersunk holes (66).

8. The device for classifying tobacco strips, orthogonally screening and cutting large tobacco strips suitable for making medium and thin cigarettes according to claim 7, characterized in that: The gap between the disc-shaped cutting knife (61) and the anvil (13) of the circular arc groove (63) is 1 to 2 mm; The distance T between any adjacent disc cutters (61) is 25.4 mm.

9. The device for classifying tobacco strips, orthogonally screening and cutting large tobacco strips suitable for making medium and thin cigarettes according to claim 8, characterized in that: The dovetail angles of the convex dovetail groove (64) and the concave dovetail groove (69) are 55°.

10. A method for classifying tobacco strips, orthogonally screening and cutting large tobacco strips suitable for making medium and thin cigarettes, characterized in that: The device for classifying tobacco strips, orthogonally screening and cutting large tobacco strips suitable for making medium and thin cigarettes according to any one of claims 1 to 9 comprises: the redried tobacco strips are inputted into the first-stage vibrating screen (2) through the input line (1), the first-stage screen plate (3) and the first screening holes (4) complete screening and classification of large and medium tobacco strips, the medium tobacco strips are inputted into the conveying line (15) through the first blanking chute (7), the large tobacco strips are inputted into the first cutting unit (6) through the first conveying plate (5) to complete size cutting, and then are inputted into the second-stage vibrating screen (8) again, the second-stage screen plate (9) and the second screening holes (10) complete screening and classification of large and medium tobacco strips, the medium tobacco strips are inputted into the conveying line (15) through the second blanking chute (19), the large tobacco strips are inputted into the second cutting unit (12) through the second conveying plate (11) to complete size cutting, and then are conveyed to the conveying line (15) through the third blanking chute (14).

Images