A dual-path material feeding device based on a receiving and loading unit and its design method

Abstract

The present application relates to a dual-path feeding device based on a receiving unit, comprising a device body, the device body comprising a feed end and a discharge end, the feed end having at least two sets of feeding wheels, and the discharge end having at least one set of discharging wheels, wherein cigarettes are fed into the device body from the feeding wheels and transported to the discharging wheels for feeding out of the device body, and the paths of the transported cigarettes to be processed gradually converge. When the receiving unit takes materials, the two feeding wheels can take materials simultaneously, forming a dual-path feeding and single-path feeding form, which reduces the feeding speed of a single feeding wheel but does not reduce the overall feeding speed, thereby ensuring the feeding stability of the feeding wheel without affecting the production speed. The division of the feeding wheel feeding area and the conveying area makes the negative pressure adsorption force of the feeding area greater and the negative pressure adsorption force of the conveying area relatively lower, which is conducive to reducing energy consumption and further increasing the feeding stability of the feeding wheel.

Description

Technical Field

[0001] The present application relates to the technical field of heated cigarette production and processing equipment, and in particular to a dual-path material taking and feeding device based on a connecting and loading unit and a design method thereof. Background Art

[0002] The assembling unit is a common cigarette processing equipment, and its overall structure is a single-channel form with multiple feed wheels connected in series. The cigarettes are transported by multiple feed wheels and pass through each processing step in turn to complete the processing of the cigarettes. When processing traditional cigarettes, the processes that usually need to be completed in the assembling unit include material taking, primary cutting, staggering, paralleling, secondary cutting, filter rod and tobacco rod joining, and tipping paper splicing, etc., and in traditional cigarette processing, the material fed to the assembling unit is four times the length of tobacco rods. Therefore, the material taking and discharging speed ratio of the assembling unit in traditional cigarette production is 1 to 4. When producing heated cigarettes, the material fed upstream of the assembling unit is double-length cigarette sticks, and after the upstream processing of the double-length cigarette sticks, the middle part of the double-length cigarette sticks are acetate fiber hollow rods and the two ends are tobacco rods. The double-length cigarette sticks can then be completed with tipping paper splicing and one-time cutting in the assembling unit. Therefore, the assembling unit for producing traditional cigarettes is heating cigarettes. In terms of working hours, it is necessary to eliminate related components such as the traditional filter rod magazine, the primary slitting wheel, the separation wheel and the offset wheel, and retain components such as the tipping paper conveying system and the smoke outlet device. The tipping paper splicing and slitting processes for double-length heated cigarettes have been completed. Since the double-length cigarettes are fed to the filling unit during the production of heated cigarettes, the material taking and discharge speed ratio of the filling unit in the production of heated cigarettes is 1 to 2. Therefore, for the production of heated cigarettes, under the premise of maintaining the same discharge speed of the filling unit, the material taking speed of the filling unit in the production of heated cigarettes should be twice as fast. However, the roundness, hardness and elasticity of the acetate fiber hollow rods in heated cigarettes are relatively low. The double-length cigarettes of heated cigarettes and the negative pressure grooves on the filling wheel are poorly combined, especially under high-speed filling operation conditions. In addition, due to the squeezing and friction of the cigarette pile, empty grooves are prone to lack of material on the filling wheel, which makes it difficult for some negative pressure grooves to absorb double-length cigarettes, affecting production progress. Summary of the Invention

[0003] The purpose of this application is to provide a dual-path material feeding device and design method based on a receiving and loading unit, which can form a dual-path material feeding method with two material feeding wheels, so that the two material feeding wheels can pick up materials at the same time, which can reduce the rotation speed of each material feeding wheel and reduce the material picking speed of the material feeding wheel, but will not affect the overall speed of the production line, thereby effectively solving the shortcomings of the existing technology.

[0004] To this end, on the first aspect, an embodiment of the present application provides a dual-path material feeding device based on a receiving and loading unit, comprising a device body, wherein the device body comprises a feed end and a discharge end, and the cigarettes to be processed enter at the feed end of the device body and are discharged at the discharge end of the device body to complete the transportation of the cigarettes, the feed end has at least two groups of material feeding wheels, and the discharge end has at least one group of discharge wheels, the number of material feeding wheels is greater than the number of discharge wheels, and the rotation path of the material feeding wheel and the discharge wheel is the transportation path of the cigarettes, the cigarettes are fed into the device body from the material feeding wheel and transported to the discharge wheel to be supplied out of the device body, and the transportation paths of the transported cigarettes to be processed gradually converge.

[0005] In a possible implementation, two groups of the retrieving wheels are provided, and one group of the discharging wheels are provided. The processed cigarettes are transported to the discharging wheels by the two groups of retrieving wheels respectively, forming a dual-path retrieving and one-path discharging structure.

[0006] In a possible implementation, it also includes a merging wheel, one side of which is provided with two conveying wheels respectively cooperating with the two feeding wheels, and the discharging wheel is located on the other side of the merging wheel. The cigarettes are transported by the two feeding wheels and the conveying wheels and converge at the merging wheel, and then supplied through the discharging wheel.

[0007] In one possible implementation, the picking wheel, conveying wheel and discharging wheel are all provided with transmission gears for transmitting driving force, and also include a power gear for transmitting power to the transmission gears of the picking wheel, conveying wheel and discharging wheel, and the transmission ratio of the power gear: the transmission gear of the picking wheel: the transmission gear of the conveying wheel is 7:8:3.

[0008] In a possible implementation, a double idler gear is provided between the power gear and the transmission gear of the reclaiming wheel to change the size and rotation direction of the reclaiming wheel.

[0009] In a possible implementation, the number of teeth of the power gear is 112, the number of teeth of the transmission gear of the material taking wheel is 128, and the number of teeth of the transmission gear of the conveying wheel is 48.

[0010] In one possible implementation, the feeding wheel is provided with a plurality of feeding troughs circumferentially, and a negative pressure port is provided on the feeding trough. The feeding wheel is divided in the rotating space and includes a feeding area and a conveying area. It also includes a negative pressure generating device for providing negative pressure to the negative pressure port of the feeding trough. The negative pressure generating device is in the feeding area so that the area where the local negative pressure port generates negative pressure is larger than the area where the negative pressure generating device generates negative pressure in the conveying area.

[0011] In one possible implementation, the number of feeding troughs on the feeding wheel is 72, the number of negative pressure ports in each feeding trough is 4, the number of feeding troughs located in the feeding area on the feeding wheel is 20, and the number of feeding troughs located in the conveying area on the feeding wheel is 39. Under the action of the negative pressure generating device, the number of negative pressure ports that generate negative pressure in each feeding trough in the feeding area is 4, and the number of negative pressure ports that generate negative pressure in each feeding trough in the conveying area is 2.

[0012] In a second aspect, the present application provides a design method for a dual-path material feeding device based on a receiving and loading unit, and specifically includes the following steps:

[0013] A. Based on the material conveying data of the original installation unit, calculate the number of teeth on the transmission gear of the reclaiming wheel and the number of teeth on the transmission gear of the conveying wheel;

[0014] B. Verify the phase based on the clutch dynamic system;

[0015] C. Re-divide the reclaiming wheel's reclaiming area and conveying area to determine the number of reclaiming chutes in the reclaiming area and the number of reclaiming chutes in the conveying area on the reclaiming wheel during equipment operation. Based on the division of the reclaiming area and the conveying area, the negative pressure device is used to ensure that the suction force of the reclaiming chutes in the reclaiming area and the suction force of the reclaiming chutes in the conveying area on the reclaiming wheel are different;

[0016] D. Conduct trial production and collect production data statistics.

[0017] In one possible implementation, in step A, when the calculation is performed based on the material conveying data of the original receiving unit, based on the use of the original power system at that location, the original power system includes a power gear, and the first expression for calculating the number of teeth of the transmission gear of the reclaiming wheel is:

[0018] Z Q =Z H / I1

[0019] In expression 1: Z Q Indicates the number of teeth of the transmission gear of the material wheel, Z H It represents the number of teeth of the power gear, and I1 represents the transmission ratio of the reclaiming wheel.

[0020] In one possible implementation, in step A, a double idler gear is provided between the power gear and the reclaiming wheel. The two gears of the double idler gear have tooth numbers Z1 and Z2, respectively. The gear with the tooth number Z1 meshes with the power gear, and the gear with the tooth number Z2 meshes with the transmission gear of the reclaiming wheel. Therefore, Expression 2 is obtained:

[0021] Z Q =(Z H / I1)×(Z2 / Z1)

[0022] In a possible implementation, the calculation process of I1 in the second expression is:

[0023] From expression three:

[0024] N Q =C Q ×I1

[0025] In expression 3, N Q Indicates the unit flow rate of the reclaiming wheel, C Q Indicates the number of reclaiming slots on the reclaiming wheel, so I1=N Q / C Q .

[0026] In a possible implementation, in the expression 3, N Q =42, C Q =72, so I1=7 / 12, in expression 2, Z1=96, Z2=64, Z H =112, so the number of teeth of the transmission gear of the reclaiming wheel is Z Q =128.

[0027] In a possible implementation, in step A, the fourth expression for calculating the number of teeth of the transmission gear of the transmission wheel is:

[0028] Z C =Z H / I2

[0029] Z in expression 4 C Indicates the number of teeth on the transmission gear of the transmission wheel, Z H It represents the number of teeth of the power gear, and I2 represents the transmission ratio of the transmission wheel.

[0030] In a possible implementation, the calculation process of I2 in the fourth expression is:

[0031] According to expression 5:

[0032] I2=N C / C C

[0033] In expression 5, N C It represents the unit flow of the transmission wheel and takes the value of 42, C C It represents the number of troughs on the conveyor wheel and is 18, so I2=7 / 3, so according to expression 4 we can get Z C =48.

[0034] According to the dual-path material picking and feeding device and design method provided in the embodiment of the present application, when the receiving unit picks up materials, two picking wheels can pick up materials at the same time. After the two picking wheels pick up materials, the cigarettes are transported to the discharge wheel to complete the subsequent processing technology, forming a dual-path material picking and single-path outward feeding form, which reduces the picking speed of a single picking wheel, but the overall picking speed is not reduced, thereby ensuring the stability of the picking wheel picking up materials without affecting the production speed. Moreover, the division of the picking area and the conveying area of ​​the picking wheel makes the negative pressure adsorption force of the picking area greater, and the negative pressure adsorption force of the conveying area is relatively reduced, which is beneficial to reducing energy consumption and further increasing the stability of the picking wheel picking up materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of the structure of a dual-path material taking and feeding device provided in an embodiment of the present application;

[0036] Figure 2 for Figure 1 Schematic diagram of the structure of the part divided by the two fault lines M and N;

[0037] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0038] Figure 4 A schematic diagram of the structure of the mating portion of the transmission gear of the reclaiming wheel and the transmission gear of the conveying wheel provided in an embodiment of the present application;

[0039] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0040] Figure 6 A schematic diagram of the structure of the material reclaiming wheel and the gas distribution seat provided in the embodiment of the present application;

[0041] Figure 7 for Figure 6 A partial enlarged view of point C in the middle;

[0042] Figure 8 A schematic diagram of the structure of the air duct provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0044] like Figures 1-8 As shown, the embodiment of the present application provides a dual-path material taking and feeding device based on a mounting group, which is used in a mounting group in the production of heated cigarettes to take cigarettes to be processed from the hopper 100 and supply the taken cigarettes to the components downstream of the mounting group to further process the cigarettes, thereby realizing the transitional transportation of the cigarettes to be processed. More specifically, the cigarettes to be processed transported are cigarettes that are twice as long as heated cigarettes. The dual-path material taking and feeding device based on the mounting group specifically includes a device body, which can be a part of the mounting group on the production line or a separate part connected between the upstream feeding and mounting groups for transferring and transporting cigarettes. This embodiment Taking the device body as a part of the receiving and assembling unit as an example, the device body is arranged at the front end part of the receiving and assembling unit, and the device body takes cigarettes at the upstream feeding unit such as the hopper 100, and then transfers the taken cigarettes to other parts of the receiving and assembling unit for further process processing. The device specifically includes a feed end 2 and a discharge end 3. The double-length cigarettes of heated cigarettes processed upstream are transported to the feed end 2, enter the device body from the feed end 2, and are then supplied to the downstream process equipment for processing through the discharge end 3, thereby completing the delivery of the cigarettes to the relevant process equipment. Specifically, the feed end 2 has at least two sets of taking wheels 201, and the discharge end 3 has at least two sets of taking wheels 201. There is one less set of discharge wheels 301, and the number of the taking wheels 201 is greater than the number of the discharge wheels 301. The rotation path of the taking wheel 201 and the rotation path of the discharge wheel 301 are the conveying paths of the transported cigarettes. The cigarettes supplied from the upstream enter the device body with the rotating taking wheel 201 and then move to the discharge wheel 301. Then, they are supplied out of the device body with the rotating discharge wheel 301 to be transported to the equipment of the downstream process step. In this process, the travel paths of the transported cigarettes to be processed gradually converge. Specifically, under the action of the device body, the overall feeding speed and the overall discharging speed of the device body are equal, and there are multiple taking wheels at the feed end 2. Wheel 201, there are multiple discharging wheels 301 at the discharging end 3, and the number of the picking wheels 201 is greater than the number of the discharging wheels 301, so the picking speed of each picking wheel 201 is lower than the discharging speed of each discharging wheel 301, so compared with the previous single-channel feeding form, while keeping the overall picking speed unchanged, the picking speed of each picking wheel 201 in this embodiment is significantly reduced, thereby avoiding the high-speed picking mode of the picking wheel 201, ensuring the stability of the picking wheel 201 in picking up materials, preventing the negative pressure groove on the picking wheel 201 from adsorbing cigarettes, avoiding the empty groove of the picking wheel 201 and lack of materials, thereby ensuring the production progress of the entire production line.

[0045] Specifically, in a preferred embodiment, taking into account the space of the unit and the continuous stability of material feeding, the number of the feeding wheels 201 is two, and the number of the discharging wheels 301 is one. The cigarettes to be processed supplied from the upstream are rotated and fed by the two groups of feeding wheels 201 and conveyed to the discharging wheel 301. Then the discharging wheel 301 rotates and conveys the cigarettes to the downstream equipment, thereby forming a dual-path feeding and single-path feeding form. In terms of cigarette conveying speed, if the speed of single-path discharging remains unchanged, the feeding speed of each feeding wheel 201 is half of the previous feeding speed, which greatly reduces the feeding speed, maintains the stability of feeding, and prevents empty slots and lack of materials in the feeding wheel 201.

[0046] More specifically, the device body also includes a merging wheel 4, which is used to merge the two feeding paths into one discharging path. Two transmission wheels 5 are provided at one end of the merging wheel 4. The transmission wheel 5 is used to cooperate with the picking wheel 201. One transmission wheel 5 cooperates with one picking wheel 201, and the other transmission wheel 5 cooperates with another picking wheel 201. The transmission wheel 5 connects the picking wheel 201 and the merging wheel 4 together. The discharging wheel 301 is on the other side of the merging wheel 4. The axes of the picking wheel 201, the transmission wheel 5, the merging wheel 4 and the discharging wheel 301 are all arranged in parallel. When the equipment is running, the cigarettes are picked up through the two paths. The conveying path composed of the wheel 201 and the transmission wheel 5 conveys at the same time and converges into a path at the merging wheel 4. Then the cigarettes are conveyed to the discharging wheel 301 through the merging wheel 4 and conveyed to the downstream equipment in the form of single-path discharging through the discharging wheel 301. Specifically, when the picking wheel 201, the transmission wheel 5, the merging wheel 4 and the discharging wheel 301 convey the cigarettes, the cigarettes are conveyed on the periphery of each wheel, so the picking wheel 201 and the transmission wheel 5 are close to each other, the transmission wheel 5 and the merging wheel 4 are close to each other, and the merging wheel 4 and the discharging wheel 301 are close to each other, completing the continuous conveying of cigarettes on the periphery of each wheel.

[0047] For the drive of the material-taking wheel 201, the conveying wheel 5, the merging wheel 4 and the discharging wheel 301, the power source can be but is not limited to an internal combustion engine, a drive motor, etc., preferably a drive motor, and the power transmission form between the drive motor and each wheel can be a transmission chain, a transmission belt or a gear, etc., or a combination of multiple methods.

[0048] Preferably, the pick-up wheel 201, the conveying wheel 5 and the discharge wheel 301 are all provided with a transmission gear 600 for transmitting power, and each wheel and the transmission gear 600 thereon are coaxially arranged, and further include a power gear 7 for transmitting power to the transmission gear 600 on the pick-up wheel 201, the transmission gear 600 on the conveying wheel 5 and the transmission gear 600 on the discharge wheel 301. The power gear 7 is the original gear of the equipment before modification, and further the power gear 7: the transmission gear 600 of the pick-up wheel 201: the transmission gear 600 of the conveying wheel 5 0: The transmission ratio of the transmission gear 600 of the discharge wheel 301 is 7:8:3:3. Furthermore, a double idler wheel 8 is arranged between the power gear 7 and the transmission gear 600 of the picking wheel 201. The double idler wheel 8 has two gears and the two gears are coaxially arranged. The gear with more teeth of the double idler wheel 8 is engaged with the power gear 7, and the gear with fewer teeth of the double idler wheel 8 is engaged with the transmission gear 600 of the picking wheel 201, thereby realizing the change of the rotation direction of the picking wheel 201 and the reduction of the size, which is conducive to spatial layout.

[0049] Preferably, the number of teeth of the power gear 7 is 112, the number of teeth of the transmission gear 600 of the material taking wheel 201 is 128, the number of teeth of the transmission gear 600 of the conveying wheel 5 is 48, and the number of teeth of the transmission gear 600 of the material discharging wheel 301 is 48. The power gear 7 drives the material taking wheel 201 and the conveying wheel 5.

[0050] A plurality of feeding troughs 9 are uniformly arranged circumferentially on the periphery of the feeding wheel 201, the periphery of the conveying wheel 5, the periphery of the merging wheel 4 and the periphery of the discharging wheel 301. The feeding troughs 9 are arranged radially. The feeding troughs 9 are used to accommodate cigarettes to be processed, and a negative pressure port 10 is also provided on the feeding trough 9. This embodiment also includes a negative pressure generating device for generating negative pressure. Under the action of the negative pressure generating device, negative pressure can be generated at the negative pressure port 10, thereby achieving adsorption of cigarettes.

[0051] For the picking wheel 201, the picking wheel 201 is divided into areas in the vertical axial direction in the rotating fixed space, specifically including a picking area 111 and a conveying area 112. At that time, the picking area 111 picks up materials at the hopper 100 of the equipment. The two picking wheels 201 can be located in the same hopper 100, or the bottom of the hopper 100 can be divided into two branches to feed the two picking wheels 201 respectively. The part of the picking wheel 201 in the hopper 100 is the picking area 111. In the rotation direction of the picking wheel 201, the area between the hopper 100 pointing to the conveying wheel 5 along the rotation direction is the conveying area 112. Under the action of the negative pressure generating device, the parts of the rotating picking trough 9 in the picking area 111 and the conveying area 112 can make the negative pressure port 10 generate negative pressure, and the rotating picking wheel 201 completes the adsorption and conveying of cigarettes. , when the cigarette is driven to rotate to a position close to the conveying wheel 5, the cigarette is sucked away by the material taking groove 9 of the conveying wheel 5, completing the transfer and transportation of the cigarette between the two wheels. The principle of cigarette transfer between the other two wheels is the same. More specifically, the negative pressure generating device in the material taking area 111 makes the area of ​​the local negative pressure port 10 generating negative pressure larger than the area of ​​the negative pressure generating device in the conveying area 112 making the local negative pressure port 10 generate negative pressure, that is, the area of ​​the negative pressure port 10 where the material taking groove 9 on the material taking wheel 201 actually generates negative pressure in the material taking area 111 is larger than the area of ​​the negative pressure port 10 where the negative pressure actually generates negative pressure in the conveying area 112. Therefore, when the material taking groove 9 in the material taking area 111 on the material taking wheel 201 has a greater adsorption force on the cigarette, the stability of the material taking can be further improved. After the material taking is completed, the adsorption force on the cigarette can be reduced to a certain extent when the cigarette is rotated and transported, and the gas distribution is more reasonable.

[0052] Specifically, the number of the material troughs 9 provided on the material trough 9 is 72, and each material trough 9 is provided with 4 negative pressure ports 10. For the division of the material taking area 111 and the conveying area 112, the number of the material troughs 9 located in the material taking area 111 on the material taking wheel 201 is 20, and the number of the material troughs 9 located in the conveying area 112 on the material taking wheel 201 is 39. Under the action of the negative pressure generating device, the material taking wheel 201 in the material taking area 111 is 20. The four negative pressure ports 10 in the material trough 9 can all generate negative pressure. For the material trough 9 in the conveying area 112 on the material taking wheel 201, only two negative pressure ports 10 generate negative pressure. Therefore, when the material taking wheel 201 takes materials in the hopper 100, the material taking trough 9 has a greater adsorption force on the cigarettes, which can further improve the material taking stability of the material taking wheel 201. After the cigarettes are brought out of the hopper 100, the adsorption force on the cigarettes can be relatively reduced when the cigarettes are conveyed, and the air distribution is more reasonable.

[0053] For this reason, Figure 6 、 Figure 7As shown, the feeding wheel 201 is driven to rotate by the wheel shaft 11, the feeding trough 9 is axially arranged on the outer periphery of the feeding wheel 201, and four negative pressure ports 10 are arranged in the feeding trough 9. An air flow channel 12 is formed inside the feeding wheel 201 corresponding to each feeding trough 9, and a group of four air flow channels 12 are arranged corresponding to each feeding trough 9. The cross section of the air flow channel 12 is circular, and one end of the air flow channel 12 extends to the feeding trough 9 to form the negative pressure port 10, and the other end of the air flow channel 12 extends to the air distribution side of the feeding wheel 201. The negative pressure generating device may include an air distribution seat 13, which is arranged on the feeding wheel 20 1, four air distribution rings 1301 are formed inside the air distribution seat 13, and the four air distribution rings 1301 are four coaxial annular cavities with different diameters of four inner and outer sleeves, and the four air distribution rings 1301 are coaxially arranged with the virtual axis of rotation of the material taking wheel 201. An opening is formed on one side of each air distribution ring 1301, which can correspond to the virtual circumference of rotation of the air inlet end of the air flow channel 12 corresponding to the four negative pressure ports 10. The other side of the air distribution ring 1301 is closed. The air distribution side of the air distribution seat 13 and the material taking wheel 201 can be set except for the corresponding area of ​​the air flow channel 12 and the air distribution ring 1301. The gasket prevents air leakage when the air distribution seat 13 and the material taking wheel 201 rotate relative to each other. The other closed side of each air distribution ring 1301 is provided with a connecting nozzle 1302 connected to the external negative pressure fan, etc. The negative pressure main circuit is connected to the connecting nozzle 1302 through a branch circuit. During operation, the air distribution seat 13 is stationary and the material taking wheel 201 rotates. Therefore, at the end of the air distribution ring 1301 that contacts the air distribution side, in the circumferential direction, the part of the air distribution seat 13 corresponding to the conveying area 112 can locally block two of the air distribution rings 1301. When the air flow channel 12 of the corresponding material taking trough 9 rotates to the material taking area 11 1, since the local gas distribution ring 1301 is blocked, the entrance of the corresponding air flow channel 12 is blocked and negative pressure cannot be generated, and only two negative pressure ports 10 generate negative pressure. All the gas distribution rings 1301 are blocked in the area except the corresponding material taking area 111 and the conveying area 112 on the gas distribution seat 13. This area is the local area where the conveying wheel 5 points to the hopper 100 along the direction of rotation. Because this area has transferred the cigarettes to the conveying wheel 5 and is in an unloaded state, the empty slot returns to the hopper 100 for re-taking, and no negative pressure is required to distribute the negative pressure airflow.

[0054] In a feasible example, a guide plate 451 and a guide finger 452 are provided between the pick-up wheel 201 and the conveying wheel 5. The guide plate 451 and the guide finger 452 cooperate to guide the cigarette from the pick-up wheel 201 to the conveying wheel 5. Specifically, the guide plate 451 and the guide finger 452 are provided at a position where the pick-up wheel 201 and the conveying wheel 5 are close to each other, and the guide plate 451 and the guide finger 452 are provided at the two outer end faces of the pick-up wheel 201 and the conveying wheel 5 to guide the two ends of the cigarette. A gap channel is formed between the guide plate 451 and the guide finger 452. The gap channel passes through the guide plate 451 and the guide finger 452. The ferry connects the outer periphery of the picking wheel 201 and the outer periphery of the conveying wheel 5, so that the travel path of the cigarettes on the picking wheel 201 and the travel path on the conveying wheel 5 form a continuous and transitional S shape at the connection point. Under the blocking and guiding action of the guide plate 451 and the guide finger 452, the cigarettes can be transferred from the picking wheel 201 to the conveying wheel 5 more stably and smoothly. There is no restriction on the specific shapes of the guide plate 451 and the guide finger 452, as long as an active surface of the guide plate 451 and an active surface of the guide finger 452 can cooperate to form a gap channel for assisting the cigarettes to pass through.

[0055] In addition, the present application also provides a design method for the dual-path material taking and feeding device based on the above-mentioned receiving and loading unit. Specifically, the method includes the following steps:

[0056] Step A: Based on the material conveying data of the original receiving unit, the number of teeth of the transmission gear 600 of the reclaiming wheel 201 and the number of teeth of the transmission gear 600 of the discharging wheel 301 are calculated. In this step, the equipment of the original receiving unit is modified. First, the previous single-path reclaiming form is changed to a dual-path reclaiming form with two reclaiming wheels 201. Then, the transmission ratio of the transmission gear 600 of the reclaiming wheel 201 and the conveying wheel 5 is adjusted, that is, the number of teeth of the transmission gear 600 of the reclaiming wheel 201 and the conveying wheel 5 is redesigned. The reclaiming wheel 201, the conveying wheel 5, the converging wheel 4 and the discharging wheel 301 are all original parts of the equipment before modification, so the number of teeth Z of the power gear 7 is H It is known that the number of the feeding troughs 9 of the original feeding wheel driven by the power gear 7 before the improvement is 42. After the improvement, the unit flow rate remains unchanged, so that the flow rate downstream of the device body is doubled, and then the overall production rate is adjusted so that the feeding speed of the feeding wheel 201 is half of the original feeding speed. Therefore, the unit flow rate on the feeding wheel 201 and the conveying wheel 5 of a single channel is N. H The spacing between the material troughs 9 on the material wheel 201 is reduced, so that the number C of the material troughs 9 on the material wheel 201 is Q Increase to 72, the number of troughs 9 on the conveyor wheel 5 C C Take it as 18, so the unit flow rate N of the input transmission of the material wheel 201 and the transmission wheel 5 along the way is H is 42, the unit flow rate N of the reclaiming wheel 201Q and N H The same is also 42, assuming the transmission ratio of the take-up wheel 201 is I1, then N Q =C Q ×I1, so I1=42 / 72=7 / 12, from expression 1, we can deduce Z Q =192.

[0057] In order to facilitate the layout of the space and the transfer of cigarettes between the take-up wheel 201 and the conveying wheel 5, a double idler wheel 8 is provided between the power gear 7 and the transmission gear 600 of the take-up wheel 201. The double idler wheel 8 has two coaxially arranged gears. The number of teeth of the gear with more teeth in the double idler wheel 8 is Z1=96, and the number of teeth of the gear with fewer teeth in the double idler wheel 8 is Z2=64. The gear with more teeth in the double idler wheel 8 is meshed with the power gear 7, and the gear with fewer teeth in the double idler wheel 8 is meshed with the transmission gear 600 of the take-up wheel 201, thereby achieving a deceleration effect and changing the direction of rotation. This can reduce the size of the take-up wheel 201 to a certain extent, which is beneficial to the layout of the installation space. Therefore, I1=42 / 72=Z H / Z Q =(Z H / Z1)×(Z2 / Z Q ), so Z Q =128, so the number of teeth of the transmission gear 600 of the material taking wheel 201 is 128.

[0058] Calculate the number of teeth of the transmission gear 600 of the transmission wheel 5. The rotation direction of the transmission wheel 5 is opposite to that of the material wheel 201. Take the unit flow rate N of the transmission wheel 5 C =N H =42, assuming the transmission ratio of the transmission wheel 5 is I2, I2 = N C / C C =42 / 18=42 / 18=7 / 3, according to expression 4, so Z C =Z H / I2=112 / (42 / 18)=48, so the number of teeth of the transmission gear 600 of the transmission wheel 5 is 48.

[0059] Step B, perform phase verification of the clutch 150 power system. The clutch 150 and the power gear 7 are coaxially connected through the power shaft 160. The clutch 150 is used to engage or disengage the front-end power source and the power shaft 160. The power source can be a gear directly or indirectly driven by the drive motor. When the entire equipment is in continuous operation, each phase can correspond, that is, the material trough 9 can correspond. Each random engagement of the clutch 150 requires a one-to-one correspondence between the phases of the upstream and downstream devices. That is, when the clutch 150 rotates for each tooth, the transmission wheel 5 rotates an integer number of material troughs 9 accordingly. The number of teeth of the clutch 150 is 14. Before the modification, the original feed wheel with 42 material troughs 9 driven by the power gear 7 can meet the phase requirement of the clutch 150 because 42 / 14 meets the integer requirement. After the modification, (18 / 14)×(112 / 48)=3, which meets the phase requirement.

[0060] The receiving and loading unit is further provided with a transition wheel 6, which is located downstream of the discharge wheel 301. The cigarettes are transported from the discharge wheel 301 to the transition wheel 6 and then to the downstream process steps for processing.

[0061] Step C: Re-divide the retrieving area 111 and the conveying area 112 of the retrieving wheel 201 according to the air distribution volume, and reset the air distribution to determine the number of retrieving troughs 9 in the retrieving area 111 and the number of retrieving troughs 9 in the conveying area 112 on the retrieving wheel 201 when the equipment is running, and according to the division of the retrieving area 111 and the conveying area 112, under the action of the negative pressure device, make the adsorption force of the retrieving troughs 9 in the retrieving area 111 on the retrieving wheel 201 and the adsorption force of the retrieving troughs 9 in the conveying area 112 on the cigarettes different. Specifically, the existing main road air duct 700 that provides negative pressure for the retrieving wheel 201 and the conveying wheel 5 on each side, such as Figure 8 As shown in the figure, the unit of dimensions is millimeter. In the cross-sectional direction of the air duct 700, the two long sides of the inner wall of the air duct 700 are two opposite and parallel straight sides, each of which is 86 mm long. The two short sides of the inner wall of the air duct 700 are two opposite and outwardly arched semicircles, each of which has a diameter of 25 mm. The two straight sides and the two semicircles enclose the inner wall cross-section of the air duct 700. The area of ​​the air duct 700 is S1 = (25 / 2) 2 π+86×25≈2641 square millimeters. The negative pressure port 10 in the reclaiming trough 9 is a circular hole with a diameter of 4 millimeters. Before the improvement, the 59 reclaiming troughs 9 on the reclaiming wheel 201 needed to actually generate negative pressure, and all 4 negative pressure ports 10 in the 59 reclaiming troughs 9 were used. In addition, the 10 reclaiming troughs 9 on the conveying wheel 5 used 2 negative pressure ports 10 in each reclaiming trough 9. Therefore, the required ventilation area is S2=(4 / 2). 2π×(59×4+10×2)≈3217 square millimeters, so S2>S1, so the ventilation area provided by the air duct 700 is insufficient. After the improvement of the solution of the present application, there are 20 material troughs 9 in the material reclaiming area 111 on the reclaiming wheel 201, and all four negative pressure ports 10 in each of the 20 material reclaiming troughs 9 are used. There are 39 material reclaiming troughs 9 in the conveying area 112 on the reclaiming wheel 201, and only two negative pressure ports 10 are used in each of the 39 material reclaiming troughs 9. In addition, there are 10 material reclaiming troughs 9 on the conveying wheel 5, and each material reclaiming trough 9 on the conveying wheel 5 needs to use two negative pressure ports 10. Therefore, the actual negative pressure area that needs to be generated is S3=(4 / 2). 2 π×(20×4+39×2+10×2)≈2237 square millimeters. After improvement, it can be found that S1>S3, so the existing air duct 700 can meet the ventilation area requirements.

[0062] Step D: put the improved equipment into trial production. It should be noted that after the improvement, the operating speed of the loading unit is set to 7000 cigarettes / minute, the speed of the upstream double-length cigarette supply is 4000 / minute, the upstream supply has a cache box with 140,000 double-length cigarettes, and the speed of the downstream packaging unit is 350 packs / minute, that is, 7000 cigarettes / minute. Therefore, for the operating speed of 7000 cigarettes / minute of the loading unit, the picking speed of each picking wheel 201 is only 3500 cigarettes / minute, which greatly reduces the picking speed of a single picking wheel 201. Compared with the working mode of the previous wheel picking before the improvement, the picking wheel 201 picks up The material is more stable, avoiding the empty slot of the picking wheel 201 and the lack of material. After the trial production, the data are counted and compared with those before and after the equipment improvement. The equipment efficiency, quality score, scrap rate and the number of shutdowns per shift and other data can be counted. After data statistics, the data before and after the improvement are shown in the following Tables 1 and 2. Moreover, in the process of trial production, there was no phenomenon of empty slot of the picking wheel 201 and the lack of material. The number of shutdowns after the improvement occurs when the cigarettes cached in the buffer box are consumed and the loading unit cannot be fed in time. The machine is shut down to replenish the double-length cigarette cache box with cigarettes, and then restarted for production after replenishment.

[0063]

[0064]

[0065] Table 1. Equipment operation data records before improvement

[0066]

[0067] Table 2. Equipment operation data records after improvement

[0068] It can be seen that the improved dual-path material feeding device and design method based on the receiving and loading unit provided in the embodiment of the present application effectively solves the problem of empty slots and lack of materials under the working condition of the original material taking wheel 201 running at high speed, so that each material taking slot 9 can stably adsorb cigarettes to ensure the production progress. Moreover, after the improvement, the equipment operation efficiency is increased from 72.90% to 90.55%, an increase of 24.21%. Moreover, due to the reduction in the material taking speed of the material taking wheel 201, the squeezing and deformation effect of the material taking wheel 201 on the cigarettes in the hopper 100 can be slowed down to a certain extent, thereby making The product quality score increased from 78.67 points to 93.33 points, and at the same time, the product scrap rate in the production process was effectively reduced, from the original 11.69% to 1.37%, a decrease of 88.28%. In addition, the improved dual-path material feeding device based on the loading unit can match the production speed of 7,000 cigarettes / minute of the loading unit, and can also fully match the downstream packaging speed of 7,000 cigarettes / minute. In addition, the actual double-long cigarette cache of 140,000 cigarettes in the upstream and midstream greatly improves the equipment's ability to produce continuously and increases the upper limit of production capacity.

[0069] It should be noted that references in this specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," and the like indicate that the described embodiment may include a particular feature, structure, or characteristic, but not necessarily every embodiment includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0070] It should be readily understood that “on,” “above,” and “over” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0071] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be in other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0072] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A design method for a dual-path feeding and retrieving device based on a receiving and loading unit, characterized in that: The following steps are involved: A. Based on the material conveying data of the original installation unit, calculate the number of teeth on the transmission gear of the reclaim wheel and the number of teeth on the transmission gear of the transfer wheel. The transfer wheel is set in conjunction with the reclaim wheel; B. Verify the phase based on the clutch dynamic system; C. Re-divide the reclaiming wheel's reclaiming area and conveying area to determine the number of reclaiming chutes in the reclaiming area and the number of reclaiming chutes in the conveying area on the reclaiming wheel during equipment operation. Based on the division of the reclaiming area and the conveying area, the negative pressure device is used to ensure that the suction force of the reclaiming chutes in the reclaiming area and the suction force of the reclaiming chutes in the conveying area on the reclaiming wheel are different; D. Conduct trial production and collect production data statistics; The dual-path retrieving and feeding device based on the receiving and loading unit includes a device body, the device body including a feed end and a discharge end. Cigarettes to be processed enter the device body at the feed end and are discharged at the discharge end of the device body to complete the transportation of the cigarettes. The feed end has at least two sets of retrieving wheels, and the discharge end has at least one set of discharge wheels. The number of retrieving wheels is greater than the number of discharge wheels. The rotation paths of the retrieving wheels and the discharge wheels are the transportation paths of the cigarettes. Cigarettes are fed into the device body from the retrieving wheels and transported to the discharge wheels for discharge from the device body, and the transportation paths of the transported cigarettes to be processed gradually converge. The reclaiming wheel is provided with a plurality of reclaiming troughs circumferentially, and the reclaiming troughs are provided with negative pressure ports. The reclaiming wheel is divided into a reclaiming area and a conveying area within the rotating space, and further includes a negative pressure generating device for providing negative pressure to the negative pressure ports of the reclaiming troughs. The negative pressure generating device is provided in the reclaiming area so that the area where the local negative pressure ports generate negative pressure is larger than the area where the local negative pressure ports generate negative pressure by the negative pressure generating device in the conveying area; The number of reclaiming troughs on the reclaiming wheel is 72, the number of negative pressure ports in each reclaiming trough is 4, the number of reclaiming troughs located in the reclaiming area on the reclaiming wheel is 20, and the number of reclaiming troughs located in the conveying area on the reclaiming wheel is 39. Under the action of the negative pressure generating device, the number of negative pressure ports that generate negative pressure in each reclaiming trough in the reclaiming area is 4, and the number of negative pressure ports that generate negative pressure in each reclaiming trough in the conveying area is 2; In step A, when the calculation is performed based on the material conveying data of the original receiving unit, based on the use of the original power system, which includes a power gear, the first expression for calculating the number of teeth of the transmission gear of the material reclaiming wheel is: From Q =Z H / I1 In expression 1: Z Q Indicates the number of teeth of the transmission gear of the material wheel, Z H Indicates the number of teeth of the power gear, I1 indicates the transmission ratio of the reclaiming wheel; In step A, a double idler gear is set between the power gear and the reclaiming wheel. The two gears of the double idler gear have two tooth numbers Z1 and Z2 respectively. The gear with Z1 tooth number is meshed with the power gear, and the gear with Z2 tooth number is meshed with the transmission gear of the reclaiming wheel. Therefore, the second expression is obtained: With Q =(Z H / I1)×(Z2 / Z1); The calculation process of I1 in the second expression is: From expression three: N Q =C Q ×I1 In expression 3, N Q Indicates the unit flow rate of the reclaiming wheel, C Q Indicates the number of reclaiming slots on the reclaiming wheel, so I1=N Q / C Q ; In the expression 3, N Q =42, C Q =72, so I1=7 / 12, in expression 2, Z1=96, Z2=64, Z H =112, so the number of teeth of the transmission gear of the reclaiming wheel is Z Q =128; In step A, the fourth expression for calculating the number of teeth of the transmission gear of the transmission wheel is: WITH C =Z H / I2 Z in expression 4 C Indicates the number of teeth on the transmission gear of the transmission wheel, Z H represents the number of teeth of the power gear, and I2 represents the transmission ratio of the transmission wheel; The calculation process of I2 in the fourth expression is: According to expression 5: I2=N C / C C In expression 5, N C It represents the unit flow of the transmission wheel and takes the value of 42, C C It represents the number of troughs on the conveyor wheel and is 18, so I2=7 / 3, so according to expression 4 we can get Z C =48.

2. The design method of a dual-path material feeding device based on a receiving and loading unit according to claim 1 is characterized in that: There are two groups of retrieving wheels and one group of discharging wheels. The cigarettes to be processed are transported to the discharging wheels by the two groups of retrieving wheels respectively, forming a dual-path retrieving and one-path discharging structure.

3. The design method of a dual-path material feeding device based on a receiving and loading unit according to claim 2 is characterized in that: The dual-path material feeding device based on the receiving and loading unit also includes a merging wheel. Two conveying wheels that cooperate with the two material taking wheels are provided on one side of the merging wheel. The discharging wheel is located on the other side of the merging wheel. The cigarettes are transported by the two-path material taking wheels and the conveying wheels and converge at the merging wheel, and then fed out through the discharging wheel.

4. The design method of a dual-path material feeding device based on a receiving and loading unit according to claim 3 is characterized in that: The picking wheel, conveying wheel and discharging wheel are all provided with transmission gears for transmitting driving force, and also include power gears for transmitting power to the transmission gears of the picking wheel, conveying wheel and discharging wheel, and the transmission ratio of the power gear: the transmission gear of the picking wheel: the transmission gear of the conveying wheel is 7:8:

3.

5. The design method of a dual-path material feeding device based on a receiving and loading unit according to claim 4 is characterized in that: A double idler gear is provided between the power gear and the transmission gear of the reclaiming wheel to change the size and rotation direction of the reclaiming wheel.

6. The design method of a dual-path material feeding device based on a receiving and loading unit according to claim 4 is characterized in that: The number of teeth of the power gear is 112, the number of teeth of the transmission gear of the material taking wheel is 128, and the number of teeth of the transmission gear of the transmission wheel is 48.

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