Device and method for adjusting packing density of finished cigarette sheets

Abstract

The present invention discloses a device and method for adjusting the packing density of finished tobacco sheets. The adjusting device includes an electronic belt scale, a material distribution belt conveyor, and a material box. A transverse primary material distribution device is provided below the outlet of the electronic belt scale, and a transverse secondary material distribution device is provided between the transverse primary material distribution device and the material distribution belt conveyor. A longitudinal material distribution device is provided in the material box. The material box is installed below the outlets at both ends of the material distribution belt conveyor, and the transverse primary material distribution device and the transverse secondary material distribution device are installed vertically. Beneficial effects: 1. The basic thickness of the tobacco sheets falling on the material distribution belt conveyor is made uniform by spreading the materials in two different directions; 2. By adopting a pair of distribution plates, the tobacco sheets can be distributed layer by layer, so that the thickness of the tobacco sheets in the material box is uniform; 3. The method of distributing materials using the density adjustment device makes the density of the tobacco sheets in the cigarette box more uniform after packing, meeting the requirements of improvement.

Description

Technical Field

[0001] The invention belongs to the technical field of tobacco leaf threshing and re-drying, and in particular relates to a device and method for adjusting the packing density of finished tobacco sheets by adopting a material leveling device and a material distributing device to adjust the packing density. Background Art

[0002] In the tobacco threshing and redrying industry, the density deviation of tobacco strips in the tobacco box directly affects the storage, fermentation and use of tobacco in the cigarette industry. A large density deviation rate in the box can easily lead to uneven moisture, temperature and pressure of tobacco strips in the box, causing agglomeration, oily, even mildew and carbon burning during storage and aging, which directly affects the stability of tobacco quality.

[0003] In order to implement the overall deployment of the "Notice of the State Tobacco Monopoly Administration on Launching a Major Project for Upgrading Leaf Threshing and Redrying Technology" (Guo Yan Ke

[2018] No. 55), and promote the orderly development of the research work on the major project for upgrading leaf threshing and redrying technology, the "Implementation Plan for the Major Project for Upgrading Leaf Threshing and Redrying Technology" was formed in accordance with the requirements of the notice document, pointing out the key technology research to improve the homogenization level of leaf threshing and redrying. Its goal and task specifically proposed the control technology of density uniformity of leaf threshing and redrying packing: systematically study the influence of pre-pressing and packing cloth methods and control methods on the uniformity of density of tobacco strip boxes, establish the control technology of density uniformity of leaf threshing and redrying tobacco strip boxes, and achieve the technical requirement of density deviation rate (DVR) ≤8.0% in the box after packing.

[0004] The currently used density adjustment device for packing cigarette sheets mainly adopts a distribution plate installed on the material box and is operated by a cylinder connected to it for longitudinal adjustment. However, the longitudinal distribution plate does not have the function of distributing more materials in the middle to both sides of the box to achieve uniform distribution of materials. The adjustment effect is not good, which is a problem that needs to be solved.

[0005] like Figure 1 As shown in the figure, when the tobacco leaves fall from the electronic belt scale to the bidirectional belt conveyor in front of the entrance of the box, the distribution of tobacco leaves on the conveyor belt is more in the middle and less on both sides, and the cross-section of the tobacco leaf flow presents a triangular distribution. Even if the longitudinal fabric adjustment is used, it will eventually lead to a higher density of tobacco leaves in the middle of the cigarette box and a lower density of tobacco leaves on both sides. This is another problem that urgently needs to be solved.

[0006] Chinese invention patent CN101792034A, an online control system for the density deviation rate of tobacco slices in a box and its method, discloses a device that adjusts the packing density by setting a material leveler below the discharge end of an electronic belt scale and setting a longitudinal cloth plate above the material box. However, the material leveler plate used can only make the tobacco slices evenly spread in the length direction of the cloth belt conveyor. When the tobacco slices falling from the electronic belt scale fall at different positions of the cloth belt conveyor, there will still be inconsistent thickness of the tobacco slices in the width direction of the cloth belt. At this time, the longitudinal cloth plate cannot be effectively adjusted, and the invention still uses a single cloth plate, so there is still a problem that the tobacco density in the middle of the cigarette box is higher and the tobacco density on both sides is lower. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a device and method for adjusting the packing density of finished tobacco leaves, so that the tobacco leaves can be evenly distributed to the distribution belt in the horizontal and vertical directions, and the distribution plate can effectively control the distribution, thereby solving the problem that the density of tobacco leaves in the middle of the cigarette box is relatively high and the density of tobacco leaves on both sides is relatively low.

[0008] In order to solve the above problems, the present invention discloses a finished cigarette packing density adjustment device, comprising an electronic belt scale 4, a material distribution belt conveyor 5, and a material box 6, characterized in that a transverse primary material equalizing device 1 is provided below the outlet of the electronic belt scale 4, a transverse secondary material equalizing device 2 is provided between the transverse primary material equalizing device 1 and the material distribution belt conveyor 5, a longitudinal material distribution device 3 is provided in the material box 6, the material box 6 is installed below the outlets at both ends of the material distribution belt conveyor 5, and the transverse primary material equalizing device 1 and the transverse secondary material equalizing device 2 are installed vertically.

[0009] Furthermore, the transverse secondary material balancing device 2 includes a secondary material balancing frame 21, a plurality of N-side rollers 22 mounted on the secondary material balancing frame, roller bearings 221 mounted on both ends of the N-side rollers 22, a roller bearing seat 211 mounted on the secondary material balancing frame 21 and connected to the roller bearings 221, a motor driving component 23 mounted on the secondary material balancing frame 21, and a chain 223 connected to the motor driving component 23 and a sprocket 222 mounted at one end of the N-side rollers 22;

[0010] Any one of the N-side rollers 22 at both ends of the secondary material balancing frame 21 can be selected as the active roller, and a roller drive sprocket 224 is installed at one end of the active roller;

[0011] The motor drive component 23 includes a transmission sprocket 232 connected to the output shaft of the reduction motor 231, and the chain 223 is sleeved on the roller transmission sprocket 224 and the transmission sprocket 232;

[0012] The two N-side rollers 22 in the center of the secondary material balancing frame 21 are provided with reverse bridge gears 225, and the two reverse bridge gears 225 mesh with each other; the N-side rollers 22 are divided into two groups from the center of the secondary material balancing frame 21, and the chains 223 are sleeved on the sprockets 222 of the two groups of N-side rollers 22, so that the left and right groups of N-side rollers 22 can rotate in the left and right directions respectively;

[0013] The transverse primary material balancing device 1 includes a primary material balancing frame 11, a plurality of electric N-side rollers 12 installed on the primary material balancing frame 11, and leak-proof plates 111 installed on both ends of the primary material balancing frame 11 and located on both sides of the electric N-side rollers 12.

[0014] Furthermore, the N-side roller 22 and the electric N-side roller 12 rotate to both sides along the central axis of their respective frames.

[0015] Preferably, for the electric N-side roller and the N-side roller, N is 4 or more.

[0016] Furthermore, the length of the transverse primary material balancing device 1 along the arrangement direction of the electric N-side rollers 12 is not greater than the width of the material distribution belt conveyor 5; the length of the transverse secondary material balancing device 2 along the arrangement direction of the N-side rollers 22 is not greater than the length of the material distribution belt conveyor 5, and the width of the N-side rollers 22 in the length direction is smaller than the width of the material distribution belt conveyor 5.

[0017] Furthermore, the longitudinal material distribution device 3 is composed of two sets of material distribution plate mechanisms 31 installed in pairs on the material box 6, and the two material distribution plate mechanisms 31 are mirror images of each other;

[0018] The material distribution plate mechanism 31 includes a material distribution plate and a plate shaft 312 installed on the material distribution plate 311, a driving rod 313 connected to the plate shaft, a plate bearing 314 and a plate bearing seat 315 installed on the upper edge of the material box, the plate bearing 314 is connected to the plate shaft 312 through a bearing hole, a connecting shaft 317 connected to the driving rod 313 and the electric push rod 316, an electric push rod cylinder 318 equipped with a bearing seat 320, and an electric push rod fixed shaft 319 connected through the bearing hole of the bearing 321 in the bearing seat 320, and the electric push rod fixed shaft 319 is fixedly connected to the outer side of the upper edge of the material box 6;

[0019] When the electric push rod 316 performs telescopic motion, it drives the driving rod 313 to make the material distribution plate 311 perform fan-shaped reciprocating motion around the plate shaft 312 as the center.

[0020] Furthermore, when the distribution plate mechanism 31 is working, the lower ends are tilted inward and maintain a certain distance, thereby forming a funnel-shaped drop opening, and the cigarette sheets fall from the drop opening; the formed drop opening can reciprocate between the two sides of the inner wall of the material box 6 while maintaining a certain width. When the distribution is completed, the two distribution plates 311 separate to the left and right and move toward the inner wall of the material box 6, and finally fit with the inner wall of the material box 6.

[0021] The present invention also discloses a method for adjusting the packing density of finished tobacco sheets, comprising:

[0022] S1. The tobacco sheets weighed by the electronic belt scale 4 are output as the belt rotates and fall into the horizontal once-through material device 1;

[0023] S2. The tobacco sheet passes through a lateral material equalizing device 1, is spread along the width direction of the fabric belt conveyor 5, and then falls into the lateral secondary material equalizing device 2;

[0024] S3. The tobacco sheets pass through the transverse secondary material distribution device 2, and the tobacco sheets are evenly distributed again along the length direction of the distribution belt conveyor 5, and then fall into the distribution belt conveyor 5;

[0025] S4. The cigarette pieces fall into the fabric belt conveyor 5, are transported by the fabric belt, and fall into the material box 6;

[0026] S5. After the cigarette sheets enter the material box 6, they pass through the drop opening formed by the longitudinal distribution device 3, and the cigarette sheets pass through the drop opening that makes horizontal reciprocating motion relative to the two sides of the material box 6, and are filled layer by layer along the bottom surface of the cigarette box to achieve reciprocating and uniform boxing.

[0027] Furthermore, in step S2, the tobacco sheets pass through the transverse primary material leveling device 1, and are evenly spread along the width direction of the material distribution belt conveyor 5;

[0028] In step S3, the tobacco sheets pass through the transverse secondary material distribution device 2 and are evenly distributed along the length direction of the material distribution belt conveyor 5;

[0029] When the distribution belt conveyor 5 transports the cigarette sheets in step S4, the cigarette sheets can be fed into different material boxes 6 at both ends of the distribution belt conveyor 5 by forward and reverse transmission; the longitudinal distribution device 3 in the material box 6 on the side where the cigarette sheets fall into forms a drop opening to work, and the longitudinal distribution device 3 on the other side where no cigarette sheets fall into the material box 6 opens to both sides and retracts, and stops on both sides of the inner wall of the material box 6.

[0030] Here’s how it works:

[0031] The tobacco flakes that fall into the electronic belt scale 4 and are weighed by the dropper are output as the belt rotates and fall into the horizontal primary material equalization device 1. Since the movement direction of the tobacco flakes on the electronic belt scale 4 is perpendicular to the conveying direction of the material distribution belt 5, the tobacco flakes that fall into the horizontal primary material equalization device 1 are mainly concentrated in the middle of the horizontal primary material equalization device 1. The front roller and the rear roller of the horizontal primary material equalization device 1 rotate in opposite directions respectively, and the tobacco flakes that fall into the middle of the horizontal primary material equalization device 1 can be evenly spread. Because the tobacco flakes are in the central position when they fall into the horizontal primary material equalization device 1, it is easy to cause the situation that the middle is thick and the two sides are thin. Therefore, the speed of the pair of electric N-side rollers 12 located at the falling point of the tobacco flakes and in the center of the primary material equalization frame 11 is set to be higher than the speed of the electric N-side rollers 12 on both sides, so that the tobacco flakes can be quickly separated to both sides when falling so that there are not too many tobacco flakes in the middle. At the same time, the speed of the electric N-side rollers 12 on both sides is relatively slow, and the tobacco flakes will not fly out of the horizontal primary material equalization device 1. The horizontal primary material equalization is thus completed.

[0032] After the first horizontal material leveling, the tobacco sheet material falling from the first horizontal material leveling device 1 onto the second horizontal material leveling device 2 is thinner under the electric N-side roller 12, and thicker under the gap of the electric N-side roller 12. The left and right parts of the N-side roller 22 on the second horizontal material leveling device 2 rotate in opposite directions respectively. Under the action of the N-side roller 22 of the second horizontal material leveling device 2, the tobacco sheet material is flattened for the second time and falls evenly. Although the tobacco sheet material falling has less material directly under the N-side roller 22 of the second horizontal material leveling device 2 and more material directly under the gap of the N-side roller 22 of the second horizontal material leveling device 2, when the cloth belt rotates, the tobacco sheet material amount error at the two places is eliminated, so that the amount of tobacco sheet falling on the cloth belt is uniform in the horizontal direction (perpendicular to the conveying direction of the cloth belt). In this way, the second horizontal material leveling is achieved.

[0033] After the secondary material equalization is completed, the tobacco sheet material falling on the material distribution belt conveyor 5 falls into the material box 6 from one side of the material distribution belt conveyor 5 as the belt rotates. At this time, the two distribution plate mechanisms 31 work together to change the motion state of the tobacco sheet material falling on the two distribution plates 311, and then falls along the gap between the lower edges of the two distribution plates 311. The thickness of the tobacco sheet material on the material distribution belt conveyor 5 can be changed by changing the rotation speed of the material distribution belt, and the gap between the lower edges of the two distribution plates 311 can be changed by adjusting the driving stroke length of the electric push rod 316. The gap is set to be slightly larger than the thickness of the tobacco sheet material, so that the tobacco sheet material falls into the material box 6 evenly along the longitudinal direction, and even longitudinal distribution is achieved.

[0034] The beneficial effects achieved are as follows: 1. By spreading the material evenly twice in different directions, the basic thickness of the tobacco sheets falling onto the material distribution belt conveyor is made uniform; 2. By adopting a pair of distribution plates, the tobacco sheets can be distributed layer by layer, so that the thickness of the tobacco sheets in the material box is uniform; 3. The method of distributing the material using the density adjustment device makes the density of the tobacco sheets in the cigarette box after packing more uniform, meeting the improvement requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Analysis of cigarette packing caused by different falling points of cigarettes falling from electronic belt scale;

[0036] Figure 2 Schematic diagram of equipment installation and overall structure when the finished tobacco strip packing density adjustment device works in conjunction with the pre-pressing equipment;

[0037] Figure 3 This is a schematic diagram of the movement direction of the feeder when it delivers the tobacco sheets to the electronic belt scale;

[0038] Figure 4 It is a schematic diagram of the movement direction of each device when performing primary material equalization, secondary material equalization and longitudinal material distribution;

[0039] Figure 5 This is a schematic diagram of the front structure of the transverse secondary material balancing device;

[0040] Figure 6 Schematic diagram of the side structure of the transverse secondary material balancing device;

[0041] Figure 7 This is a schematic diagram of the installation structure of the N-side roller of the transverse secondary material balancing device;

[0042] Figure 8 It is a front view of the N-side structure of the N-side roller or the electric N-side roller;

[0043] Fig. 9 It is a schematic diagram of the structure of a horizontal primary material equalizing device;

[0044] Fig.10 It is a schematic diagram of the fabric plate structure;

[0045] Fig.11 It is a structural schematic diagram of the longitudinal material distribution mechanism installed on the material box;

[0046] Fig.12 This is a planing surface diagram of the longitudinal material distribution mechanism installed in the material box;

[0047] Fig.13 It is a schematic diagram of the installation of a material box and a material conveyor belt equipped with a longitudinal material conveying mechanism;

[0048] Fig.14 This is the installation diagram of the fixed part of the material box;

[0049] Fig.15 It is a schematic diagram of the structure of the movable part of the material box.

[0050] Reference numerals: transverse primary material balancing device 1, transverse secondary material balancing device 2, longitudinal material distribution device 3, electronic belt scale 4, material distribution belt conveyor 5, material box 6, cigarette box 7, cigarette box conveyor belt conveyor 8, primary material balancing frame 11, electric N-side roller 12, leak-proof plate 111, secondary material balancing frame 21, roller bearing seat 211, N-side roller 22, roller bearing 221, sprocket 222, chain 223, roller transmission sprocket 224, reverse bridge gear 225, motor drive component 2 3. Reduction motor 231, transmission sprocket 232, cloth plate mechanism 31, cloth plate 311, plate shaft 312, driving rod 313, plate bearing 314, plate bearing seat 315, electric push rod 316, connecting shaft 317, electric push rod cylinder 318, electric push rod fixed shaft 319, bearing seat 320, bearing 321, hydraulic push rod 61, landing point is A slightly inside the center of the cloth belt conveyor, landing point is B slightly inside the center of the cloth belt conveyor, landing point is C slightly outside the center of the cloth belt conveyor. DETAILED DESCRIPTION

[0051] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments and drawings, but the present invention is not limited to the following technical solution.

[0052] like Figure 2-4 A finished tobacco strip packing density adjustment device comprises an electronic belt scale 4, a material distribution belt conveyor 5, and a material box 6. A transverse primary material equalizing device 1 is provided below the outlet of the electronic belt scale 4, a transverse secondary material equalizing device 2 is provided between the transverse primary material equalizing device 1 and the material distribution belt conveyor 5, a longitudinal material distribution device 3 is provided in the material box 6, and the material box 6 is installed below the outlets at both ends of the material distribution belt conveyor 5.

[0053] When the density adjusting device is installed and used in conjunction with a tobacco sheet pre-pressing machine, the density adjusting device is installed at the lower inner side of the pre-pressing machine, and the material box 6 of the density adjusting device is aligned with the pressure head of the pre-pressing machine. When the pressure head is working, it enters the material box 6 to compress the tobacco sheets in the cigarette box 7. A cigarette box 7 conveying belt conveyor is installed below the material box 6, and the cigarette box 7 is transported on the cigarette box 7 conveying belt conveyor. When the cloth is working, the material box 6 can be accurately inserted into the cigarette box 7 and fit with the inner wall of the cigarette box 7.

[0054] The transverse primary material balancing device 1 and the transverse secondary material balancing device 2 are installed vertically, and the N-side roller 22 and the electric N-side roller 12 are in a cross-shaped position.

[0055] like Figure 5-7The transverse secondary material balancing device 2 includes a secondary material balancing frame 21, a plurality of N-side rollers 22 mounted on the secondary material balancing frame 21, roller bearings 221 mounted on both ends of the N-side rollers 22, roller bearing 221 seats 211 mounted on the secondary material balancing frame 21 and connected to the roller bearings 221, a motor driving component 23 mounted on the secondary material balancing frame 21, and a chain 223 connected to the motor driving component 23 and a sprocket 222 mounted at one end of the N-side rollers 22;

[0056] Select any one of the N-side rollers 22 at both ends of the secondary material balancing frame 21 as the active roller, and install a roller drive sprocket 224 at one end of the active roller;

[0057] The motor driving component 23 includes a transmission sprocket 232 connected to the output shaft of the reduction motor 231 , and the chain 223 is sleeved on the roller transmission sprocket 224 and the transmission sprocket 232 .

[0058] The N-side rollers 22 are arranged in parallel and installed on the same plane. The two N-side rollers 22 in the center of the secondary material balancing frame 21 are provided with reverse bridge gears 225, and the two reverse bridge gears 225 are meshed with each other; the N-side rollers 22 are divided into two groups from the center of the secondary material balancing frame 21, and the chains 223 are connected on the sprockets 222 of the two groups of N-side rollers 22, so that the left and right groups of N-side rollers 22 can rotate in the left and right directions respectively.

[0059] The length of the transverse secondary material balancing device 2 along the arrangement direction of the N-side rollers 22 is not greater than the length of the material distribution belt conveyor 5 , and the width of the N-side rollers 22 in the length direction is less than the width of the material distribution belt conveyor 5 .

[0060] When the motor of the horizontal secondary material equalizing device 2 is started, the reduction motor 231 drives the transmission sprocket 232 on the motor output shaft to drive the transmission sprocket 232 on the active roller to rotate outward through the chain 223. At this time, the active roller drives the N-side rollers 22 under the entire set of chains 223 to rotate outward together through the chain 223; at this time, the central reverse bridge gear 225 is driven to rotate, driving the reverse bridge gear 225 on the other side, so that the N-side roller 22 rotates to the opposite side under the drive of the chain 223 on this side.

[0061] The transverse secondary material balancing device 2 can also be implemented by adopting the structure of the transverse primary material balancing device 1.

[0062] like Figure 8-9 The transverse primary material balancing device 1 includes a primary material balancing frame 11, an electric N-side roller 12 installed on the frame, and leak-proof plates 111 installed on both sides of the primary material balancing frame 11 and located at both ends of the electric N-side roller 12.

[0063] The electric N-side roller 12 can be installed on the primary material balancing frame 11 by screws by drilling or reaming or directly using an electric N-side roller 12 with threaded holes at both ends; the primary material balancing frame 11 is installed on the secondary material balancing frame 21, and the mounting holes and the connecting holes of the electric rollers are not in a one-to-one correspondence, and the spacing of the electric rollers can be adjusted by connecting different mounting holes.

[0064] The length of the transverse primary material balancing device 1 along the arrangement direction of the electric N-side rollers 12 is not greater than the width of the material distribution belt conveyor 5; the speed of the two central electric N-side rollers 12 is set to be greater than the speed of the side electric N-side rollers 12.

[0065] like Figure 10-13 The longitudinal material distribution device 3 is composed of a pair of material distribution plate mechanisms 31 installed in pairs on the material box 6, and the two material distribution plate mechanisms 31 are mirror images of each other;

[0066] The cloth plate 311 mechanism 31 includes a plate shaft 312 installed on the cloth plate 311, a driving rod 313 connected to the plate shaft 312, a plate bearing 314 and a plate bearing seat 315 installed on the upper edge of the material box 6, the plate bearing 314 is connected to the plate shaft 312 through a bearing hole, a connecting shaft 317 connected to the driving rod 313 and the electric push rod 316, an electric push rod cylinder body 318 equipped with a bearing seat 320, an electric push rod fixed shaft 319 connected through the bearing hole of the bearing 321 in the bearing seat 320, and the electric push rod fixed shaft 319 is fixedly connected to the outer side of the upper edge of the material box 6.

[0067] When the electric push rod 316 performs telescopic movement, it drives the driving rod 313 to make the cloth plate 311 perform fan-shaped reciprocating movement around the plate shaft 312;

[0068] When the distribution plate mechanism 31 is working, the lower ends are tilted inward and maintain a certain distance, thereby forming a funnel-shaped drop opening, and the cigarette sheets fall from the drop opening; at the same time, the drop opening formed can reciprocate between the two sides of the inner wall of the material box 6 under the condition of maintaining a certain width. When the distribution is completed, the two distribution plates 311 separate to the left and right and move toward the inner wall of the material box 6, and finally fit with the inner wall of the material box 6.

[0069] like Figure 14-15 The material box 6 is divided into a fixed material box part and a movable material box part, which are connected by a hydraulic push rod. The fixed material box part is fixed on the material box bracket, and the movable material box part moves with the hydraulic push rod 61. When the hydraulic push rod contracts, the movable material box part rises, and finally the lower edge of the movable material box part is above the smoke box 7; when the hydraulic push rod 61 extends, the movable material box part falls, and finally the movable material box part is inserted into the smoke box 7, and its lower edge finally falls into the smoke box 7 and contacts the inner bottom surface of the smoke box 7.

[0070] When working together with the existing pre-pressing equipment, the electrically controlled components of the density regulating device can be connected to the pre-pressing control system for overall control. Example

[0071] We are now renovating and upgrading the equipment currently in use, and the production and installation process is as follows.

[0072] In this embodiment, 14 N-side rollers 22 and 4 motorized N-side rollers 12 are used.

[0073] First, make and install a transverse secondary material distribution device, weld the arc surface of the N-sided rollers tangently to the roller surface, and weld the arc surfaces of the N-sided rollers firmly to form N-type (N=5 in the embodiment) surface rollers, and the roller length is slightly smaller than the belt width of the material distribution belt; next, connect and install the roller bearings 221 and the roller bearing seats 211 at both ends of the 5-sided rollers; next, install the sprocket 222 at the power drive end of the 5-sided rollers; next, install the 5-sided rollers connected with the roller bearings 221, the roller bearing seats 211 and the sprocket 222 on the secondary material distribution frame 21, set and adjust the gaps between the 5-sided rollers, and fix the roller bearing seats 211; next, install the chain 223 and the reduction motor 231, and install and fix the transverse secondary material distribution device 2 above the material distribution belt machine 5 and directly below the 4-piece cigarette outlet of the electronic belt scale.

[0074] Secondly, make and install the transverse primary material balancing device 1, weld the N-side roller arc surface tangent to the electric roller surface, and make the N-side roller arc surfaces welded firmly to form a quasi-electric N (N=4 in the embodiment), the total length of the electric roller is slightly larger than the belt width of the electronic belt scale 4, and the width of the primary material balancing frame 11 is determined according to the length of the electric roller; next, install the primary material balancing frame 11 between the electronic belt scale 4 and the transverse secondary material balancing device 2 and install the primary material balancing frame 11 on the transverse secondary material balancing device 2, and the installation direction of the transverse primary material balancing device 1 should ensure that it is aligned with the transverse Vertically to the secondary material balancing device 2; the next step is to set and adjust the gap between the 4 rollers, use drilling or reaming methods or directly use electric rollers with threaded holes at both ends, and install the electric rollers on the primary material balancing frame 11 with screws. The mounting holes and the connecting holes of the electric rollers are not in a one-to-one correspondence, and the spacing of the electric rollers can be adjusted by connecting different mounting holes; the next step is to install the tobacco leaf leakage prevention plate 111 at both ends of the primary material balancing frame 11 and connect them firmly; the next step is to connect the electrical circuit and test whether the rotation of the electric 4 rollers is abnormal, and set the steering of the electric 4 rollers.

[0075] Then, the longitudinal material distributing device 3 is manufactured and installed, and the plate shaft 312 is connected to the material distributing plate 311 and fixed; the next step is to install the plate bearing 314 and the plate bearing seat 315 at both ends of the plate shaft 312; the next step is to fix the plate bearing seat 315 on the upper edge of the material box 6 and connect it firmly; the next step is to connect the driving rod 313 to one end of the plate shaft 312; the next step is to connect the electric push rod 316 to the driving rod 313, and make the electric push rod 316 flexibly rotate along the driving rod 313; the next step is to adjust the material distributing plate 311 according to the material distributing plate 311. The installation position of the electric push rod 316 device is set according to the rotation range, and the electric push rod cylinder 318 is installed and connected to the bearing seat 320. The bearing seat 320 is connected with a bearing 321, and the bearing hole is connected with an electric push rod fixed shaft 319. According to the position of the bearing hole, the electric push rod 316 is fixedly connected to the outer side of the upper edge of the material box 6 (or on the overall frame); the next step is to make and install the other side of the cloth plate 311 opposite to it according to the same steps as above (the two cloth plates 311 are in a mirror structure and are installed in pairs for use).

[0076] The setting and adjustment of the packing density device.

[0077] Setting and adjustment of the transverse primary material leveling device 1. The number and spacing of the N-side rollers 22 of the transverse primary material leveling device 1 are limited by the length of the N-side rollers 22 of the transverse secondary material leveling device 2 (i.e., the width of the material distribution belt conveyor 5, and the width of the material distribution belt conveyor 5 matches the length of the material box 6, and the length of the material box 6 matches the length direction of the cigarette box 7).

[0078] Adjust the spacing between the electric N-side rollers 12. Because the flow rate of the electronic belt scale 4 above the horizontal one-time material equalization device 1 is constant, and the tobacco leaves are roughly divided into three categories: upper tobacco leaves, middle tobacco leaves, and lower tobacco leaves. Under the condition of a constant flow rate, the instantaneous tobacco leaf amount (unit volume) output by the end of the electronic belt scale 4 produces three values ​​(the upper tobacco leaves are the smallest, the middle tobacco leaves are the second, and the upper tobacco leaves are the largest). Therefore, when adjusting the spacing between the electric N-side rollers 12, the tobacco leaves output by the electronic belt scale 4 should be evenly spread out on the horizontal one-time material equalization device 1 and then fall from between the electric N-side rollers 12 (if the spacing is large, the number of electric N-side rollers 12 is small, and if the spacing is small, the number of electric N-side rollers 12 is large. If the spacing is too large, the tobacco leaves are unevenly spread, and more fall from the middle gap, and less fall from the gaps on both sides; if the gap is too small, although the tobacco leaves are spread out evenly, some tobacco leaves fail to fall from the gaps in time after being spread out, resulting in too much tobacco leaves accumulating on both sides, which may cause material blockage or tobacco leakage after a long time).

[0079] Adjustment of the rotation direction of the electric N-side roller 12. The four N-side rollers 22 are divided into two groups with the center of the primary material distribution frame 11, and rotate to both sides respectively, and the speed of the two middle rollers is set to be faster than the speed of the two rollers at the two ends.

[0080] The horizontal secondary material leveling device 2 is set. The spacing between the N rollers 22 is constant, and the specific spacing value is based on the tobacco sheets being evenly spread and flattened after falling. The speed values ​​of the N rollers 22 are equal to ensure that the tobacco sheets can fall evenly from the N rollers 22 of the horizontal secondary material leveling device 2, and then through the rotation of the material distribution belt conveyor 5 below, the falling tobacco sheets are evenly stacked together, and finally the thickness consistency of the tobacco sheets in the horizontal direction is achieved for adjustment.

[0081] The installation distance between the horizontal primary material equalizing device 1 and the horizontal secondary material equalizing device 2 is set and installed by dividing the distance between the material distribution belt conveyor 5 and the electronic belt scale 4 into three equal parts. This can effectively improve the space utilization rate and avoid the occurrence of material blocking and the like. Each spacing is about 200mm-350mm. With the current setting, there is no material blocking and the like in tobacco leaves, and the spreading and flattening effect is good. The density value difference in the horizontal direction is reduced after the tobacco leaves are packed.

[0082] Debug the whole equipment. Under the condition of equipment operation, observe the feeding effect of the horizontal primary feeding device 1, and adjust the spacing and rotation speed between the electric N-side rollers 12 according to the feeding effect to ensure that the tobacco sheet material is evenly spread and distributed; next, adjust the spacing between the lower edges of the two feeding plates 311 of the longitudinal feeding device 3 according to the thickness of the tobacco sheet on the feeding belt. Under the premise of no material blockage, the rotation speed of the feeding belt conveyor 5 can be adjusted to make the thickness of the tobacco sheet material larger, but the material thickness should be no more than half of the width of the cigarette box 7, about 345mm (taking the cigarette box 7 of 1115mm X690mm X 725mm as an example).

[0083] The workflow is as follows:

[0084] The tobacco sheets that are weighed after falling into the electronic belt scale 4 by the dropper are output as the belt rotates and fall into the transverse primary material equalizing device 1. Since the movement direction of the tobacco sheets on the electronic belt scale 4 is perpendicular to the conveying direction of the material distribution belt 5, the tobacco sheets are mainly concentrated in the middle part of the transverse primary material equalizing device 1 when falling into the transverse primary material equalizing device 1. The front roller and the rear roller of the transverse primary material equalizing device 1 rotate in opposite directions respectively, so that the tobacco sheets that fall into the middle part of the transverse primary material equalizing device 1 can be evenly spread out to achieve transverse primary material equalization.

[0085] The tobacco sheet material falling on the horizontal secondary material equalizing device 2 is thinner under the electric N-side roller 12, and thicker under the gap of the electric N-side roller 12. The left and right parts of the N-side roller 22 on the horizontal secondary material equalizing device 2 rotate in opposite directions respectively. Under the action of the N-side roller 22 of the horizontal secondary material equalizing device 2, the tobacco sheet material is flattened for the second time and falls evenly. Although the tobacco sheet material falling directly under the N-side roller 22 of the horizontal secondary material equalizing device 2 is less, and the tobacco sheet material directly under the gap of the N-side roller 22 of the horizontal secondary material equalizing device 2 is more, when the cloth belt rotates, the error of the tobacco sheet material amount at the two places is eliminated, so that the amount of tobacco sheet falling on the cloth belt is uniform in the horizontal direction (perpendicular to the conveying direction of the cloth belt), realizing the horizontal secondary material equalization.

[0086] The tobacco sheet material falling on the distribution belt conveyor 5 falls into the material box 6 from one side of the distribution belt conveyor 5 as the belt rotates. A longitudinal distribution device 3 is arranged above the material box 6. The longitudinal distribution device 3 is composed of a pair of distribution plate mechanisms 31. Under the coordinated action of the two distribution plate mechanisms 31, the movement state of the tobacco sheet material falling on the two distribution plates 311 is changed, and then falls along the gap between the lower edges of the two distribution plates 311. The thickness of the tobacco sheet material on the distribution belt conveyor 5 can be changed by changing the rotation speed of the distribution belt, and the gap between the lower edges of the two distribution plates 311 can be changed by adjusting the driving stroke length of the electric push rod 316. The gap is set to be slightly larger than the thickness of the tobacco sheet material, so that the tobacco sheet material falls into the material box 6 evenly along the longitudinal direction, and even distribution in the longitudinal direction is achieved.

[0087] When working together with the existing pre-pressing equipment, the electrically controlled components of the density regulating device can be connected to the pre-pressing control system.

[0088] The working process is as follows: the re-roasted tobacco sheets pass through the dropper and fall into the electronic belt scale 4 for measurement and weighing, and then are output and fall onto the transverse primary material balancing device 1. Taking the falling point of the tobacco sheets into the transverse primary material balancing device 1 as a reference, the electric N-side roller 12 in front of the falling point rotates clockwise and forward, and the electric N-side roller 12 behind the falling point rotates counterclockwise. After the tobacco sheets pass through the transverse primary material balancing device 1 for balancing, they fall evenly onto the transverse secondary material balancing device 2. Taking the transverse midpoint where the tobacco sheets fall onto the transverse secondary material balancing device 2 as a reference, the N-side rollers 22 on both sides of the midpoint rotate in opposite directions, so that the tobacco sheets pass through the transverse secondary material balancing device 2 for more even distribution. After falling onto the feeding belt 5, the feeding belt can realize reciprocating feeding. The feeding belt 5 delivers the incoming cigarette pieces to the material box 6 on one side. At the same time, the longitudinal feeding device 3 installed at both ends of the feeding machine is started. Under the coordinated action of a pair of feeding plate mechanisms 31, the incoming cigarette pieces fall into the material box 6 at a certain longitudinal speed and the drop-off opening formed by the feeding plate 311 in a transverse reciprocating manner, and finally fall into the cigarette box 7 below the material box 6. When the weight of the cigarette pieces falling into the material box 6 reaches the specified value, the weighing system of the pre-pressing machine sends a signal after weighing, so that the longitudinal feeding device 3 stops feeding and returns to the original position (the side walls of the material box 6 on both sides) to prevent the interference pressure head from going down. At this time, the motor driving the feeding belt 5 also reverses immediately, and the feeding belt 5 starts to feed the material box 6 on the other side, and the longitudinal feeding mechanism on the other side starts feeding.

[0089] After the material conveyor 5 reverses the feeding, the pressure head of the main oil cylinder on this side starts to press down. The pressure head is divided into four stages during the downward pressing process: rapid drop, rapid pressure, slow pressure, and pressure holding. After the pressure holding is completed, the movable material box 6 and the pressure head will rise and return. The material box 6 rises first, and when its lower edge is about 150mm higher than the lower plane of the pressure head, it stops rising and the pressure head rises instead. The rise of the pressure head is divided into three stages: "slow-fast-slow" until the pressure head stops at the upper end point. When the pressure head changes from slow to fast rise, the movable material box 6 starts to rise again until it stops at the upper end point.

[0090] When the movable material box 6 rises, when its lower edge rises above the height of the upper edge of the cigarette sheets, the cigarette box 7 conveyor starts to operate, and the cigarette box 7 filled with and compacted cigarette sheets is sent out, and at the same time, the empty cigarette box 7 is sent in to be loaded with cigarette sheets. A set of pre-pressing machine has a pressing head and a material box 6 on the left and right sides, and when the working cycle of the pressing head on one side is completed, the other side starts to work, and they work alternately. The working process of the left and right links is exactly the same.

Claims

1. A device for adjusting the packing density of finished tobacco sheets, comprising an electronic belt scale (4), a material distribution belt conveyor (5), and a material box (6), characterized in that: A transverse primary material balancing device (1) is provided below the outlet of the electronic belt scale (4), a transverse secondary material balancing device (2) is provided between the transverse primary material balancing device (1) and the material distribution belt conveyor (5), a longitudinal material distribution device (3) is provided in the material box (6), the material box (6) is installed below the outlets at both ends of the material distribution belt conveyor (5), and the transverse primary material balancing device (1) and the transverse secondary material balancing device (2) are installed vertically; The transverse secondary material balancing device (2) comprises a secondary material balancing frame (21), a plurality of N-side rollers (22) mounted on the secondary material balancing frame, roller bearings (221) mounted at both ends of the N-side rollers (22), a roller bearing seat (211) mounted on the secondary material balancing frame (21) and connected to the roller bearings (221), a motor driving component (23) mounted on the secondary material balancing frame (21), and a chain (223) connected to the motor driving component (23) and a sprocket (222) mounted at one end of the N-side rollers (22); Any one of the N-side rollers (22) at both ends of the secondary material balancing frame (21) can be selected as a driving roller, and a roller drive sprocket (224) is installed at one end of the driving roller; The motor drive component (23) comprises a transmission sprocket (232) connected to the output shaft of the reduction motor (231), and the chain (223) is sleeved on the roller transmission sprocket (224) and the transmission sprocket (232); Two N-side rollers (22) in the center of the secondary material balancing frame (21) are provided with reverse bridge gears (225), and the two reverse bridge gears (225) are meshed with each other; the N-side rollers (22) are divided into two groups from the center of the secondary material balancing frame (21), and chains (223) are sleeved on the sprockets (222) of the two groups of N-side rollers (22), so that the left and right groups of N-side rollers (22) can rotate in left and right directions respectively; The transverse primary material balancing device (1) comprises a primary material balancing frame (11), a plurality of electric N-side rollers (12) mounted on the primary material balancing frame (11), and leak-proof plates (111) mounted on both ends of the primary material balancing frame (11) and located on both sides of the electric N-side rollers (12); The installation distance between the horizontal primary material balancing device (1) and the horizontal secondary material balancing device (2) is set and installed by dividing the distance between the material distribution belt conveyor (5) and the electronic belt scale (4) into three equal parts.

2. The device for adjusting the packing density of finished tobacco sheets according to claim 1, characterized in that: The N-side roller (22) and the electric N-side roller (12) rotate toward both sides along the central axis of their respective frames.

3. The device for adjusting the packing density of finished tobacco sheets according to claim 1, characterized in that: The N-side roller (22) and the electric N-side roller (12) are in a cross-shaped position.

4. The device for adjusting the packing density of finished tobacco sheets according to claim 1, characterized in that: The electric N-side roller (12) and the N-side roller (22), N is greater than or equal to 4.

5. The device for adjusting the packing density of finished tobacco sheets according to claim 1, characterized in that: The length of the transverse primary material balancing device (1) along the arrangement direction of the electric N-side rollers (12) is less than the width of the material distribution belt conveyor (5); the length of the transverse secondary material balancing device (2) along the arrangement direction of the N-side rollers (22) is not greater than the length of the material distribution belt conveyor (5), and the width of the N-side rollers (22) in the length direction is not greater than the width of the material distribution belt conveyor (5).

6. The device for adjusting the packing density of finished tobacco sheets according to claim 1, characterized in that: The longitudinal material distribution device (3) is composed of two sets of material distribution plate mechanisms (31) installed in pairs on the material box (6), and the two material distribution plate mechanisms (31) are mirror images of each other; The material distribution plate mechanism (31) comprises a material distribution plate and a plate shaft (312) mounted on the material distribution plate (311), a driving rod (313) connected to the plate shaft, a plate bearing (314) and a plate bearing seat (315) mounted on the upper edge of the material box, the plate bearing (314) being connected to the plate shaft (312) via a bearing hole, a connecting shaft (317) connected to the driving rod (313) and an electric push rod (316), an electric push rod cylinder (318) mounted with a bearing seat (320), and an electric push rod fixed shaft (319) connected via a bearing hole of a bearing (321) in the bearing seat (320), wherein the electric push rod fixed shaft (319) is fixedly connected to the outer side of the upper edge of the material box (6); When the electric push rod (316) performs telescopic movement, it drives the driving rod (313) to cause the material distribution plate (311) to perform fan-shaped reciprocating movement around the plate shaft (312).

7. A finished tobacco sheet packing density adjustment device according to claim 6, characterized in that: When the material distribution plate mechanism (31) is in operation, the lower ends of the material distribution plates (311) are inclined inwardly and maintain a certain distance, thereby forming a funnel-shaped material drop opening, and the tobacco sheets fall from the material drop opening; the formed material drop opening can reciprocate between the two sides of the inner wall of the material box (6) under the condition of maintaining a certain width; when the material distribution is completed, the two material distribution plates (311) separate to the left and right and move toward the inner wall of the material box (6), and finally fit the inner wall of the material box (6).

8. A method for adjusting the packing density of finished tobacco sheets according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. The tobacco sheets weighed by the electronic belt scale (4) are output as the belt rotates and fall into the horizontal primary material equalization device (1); S2. The tobacco sheets pass through the primary lateral material distribution device (1), are evenly distributed along the width direction of the material distribution belt conveyor (5), and then fall into the secondary lateral material distribution device (2); S3. The tobacco leaves pass through the transverse secondary material distribution device (2), and the tobacco leaves are again evenly distributed along the length direction of the distribution belt conveyor (5), and then fall into the distribution belt conveyor (5); S4. The cigarette pieces fall into the cloth belt conveyor (5), are transported by the cloth belt, and fall into the material box (6); S5. After the tobacco leaves enter the material box (6), they pass through the drop opening formed by the longitudinal material distribution device (3), and the tobacco leaves pass through the drop opening that makes a horizontal reciprocating motion relative to the long sides of the material box (6), and are filled layer by layer along the bottom surface of the cigarette box, thereby achieving reciprocating and uniform packing.

9. A method for adjusting the packing density of finished tobacco sheets according to claim 8, characterized in that: In step S2, the tobacco sheets pass through a transverse primary material distribution device (1) to be evenly distributed along the width direction of the material distribution belt conveyor (5); In step S3, the tobacco sheets pass through the transverse secondary material distribution device (2) to be evenly distributed along the length direction of the material distribution belt conveyor (5); In step S4, when the distribution belt conveyor (5) transports the cigarette sheets, the cigarette sheets can be fed into different material boxes (6) at both ends of the distribution belt conveyor (5) by forward and reverse rotation; the longitudinal distribution device (3) in the material box (6) on the side where the cigarette sheets fall into forms a drop opening to operate, and the longitudinal distribution device (3) on the other side where no cigarette sheets fall into the material box (6) is opened to both sides and retracted, and stops at both sides of the inner wall of the material box (6).

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