Tobacco material conveying equipment

Abstract

The utility model relates to the technical field of conveying devices, and discloses tobacco material conveying equipment which comprises a two-way conveyor used for receiving materials and outputting the materials to a first discharging end in the forward direction or outputting the materials to a second discharging end in the reverse direction in the material conveying direction. The material storage device is arranged below the second discharging end and used for receiving the materials falling from the second discharging end and outputting the materials to a third discharging end of the material storage device in the material conveying direction; the temporary storage conveyor is obliquely arranged and comprises an upstream end and a downstream end in the material conveying direction, and the upstream end is arranged below the two-way conveyor and the material storage device and used for receiving the materials falling from the second discharging end and the third discharging end and outputting the materials to the downstream end from the upstream end; and the electronic belt scale is arranged below the downstream end of the cache conveyor and is used for receiving the materials falling from the cache conveyor. According to the utility model, the crushing amount of batch materials can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of conveying devices, and particularly relates to a tobacco material conveying device. Background Art

[0002] In the tobacco leaf processing production line of cigarette manufacturing enterprises, the constant flow conveying equipment for tobacco materials is particularly widely used, and is generally used in occasions where high requirements are imposed on the uniformity of the incoming tobacco leaves and quantitative control of the tobacco leaves is required.

[0003] At present, the constant flow conveying equipment for tobacco materials currently used by cigarette manufacturing enterprises at home and abroad generally consists of a feeding machine bin, a climbing belt, a limiting pipe, and an electronic belt scale. The feeding machine bin serves as a large-scale buffer device to buffer a certain amount of tobacco leaves for the constant flow equipment of tobacco leaves, and conveys the tobacco leaves to the limiting pipe through the climbing belt, and then to the electronic belt scale. The limiting pipe serves as a small-scale tobacco leaf buffer device, which is beneficial to improving the stability of the tobacco leaf supply of the electronic belt scale, thereby achieving the purpose of constant flow control.

[0004] Chinese Patent Application with Publication No. CN208070727U discloses a tobacco leaf conveying device, including: a feeding machine, a horizontal transmission belt, a lifting belt, and a belt scale; the horizontal transmission belt conveys the tobacco leaves to the lower part of the lifting belt via the feeding machine, and after the lifting belt lifts the tobacco leaves, the tobacco leaves fall onto the belt scale; the tobacco leaf quantity data of the belt scale is transmitted to the lifting belt to control the running speed of the lifting belt. However, the lifting belt in this tobacco leaf conveying device is in a Z shape, and the material first falls onto the horizontal section at the bottom of the lifting belt, and there is tumbling and extrusion of the material at the bottom of the lifting belt, which easily leads to a large problem of material breakage in batches. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problem that the existing tobacco material conveying equipment is prone to cause a large amount of material breakage in batches. The utility model provides a tobacco material conveying device, which can reduce the amount of material breakage in batches.

[0006] To solve the above technical problems, an embodiment of the utility model provides a tobacco material conveying device, including:

[0007] A two-way conveyor for receiving materials and outputting the materials in the forward direction along the material conveying direction to a first discharge end or in the reverse direction to a second discharge end;

[0008] A storage device arranged below the second discharge end for receiving the materials falling from the second discharge end and outputting the materials in the material conveying direction to a third discharge end of the storage device;

[0009] The buffer conveyor is disposed obliquely and includes an upstream end and a downstream end along the material conveying direction. The upstream end is disposed below the two-way conveyor and the storage device, and is used to receive the materials falling from the second discharge end and the third discharge end and output the materials from the upstream end to the downstream end;

[0010] The electronic belt scale is disposed below the downstream end of the buffer conveyor and is used to receive the materials falling from the buffer conveyor.

[0011] According to another specific embodiment of the present invention, when the material is in the head stage, the two-way conveyor receives the material and outputs the material reversely to the second discharge end, and the material falls into the storage device from the second discharge end;

[0012] When the material is in the steady state stage and the tail stage, the two-way conveyor receives the material and outputs the material forward to the first discharge end. The material falls onto the buffer conveyor from the first discharge end. After the buffer conveyor lifts the material to the downstream end, the material falls onto the electronic belt scale through the downstream end;

[0013] When the material is in the tail stage, the storage device further outputs the material to the third discharge end, and the material falls onto the buffer conveyor from the third discharge end.

[0014] According to another specific embodiment of the present invention, it further includes:

[0015] The first photoelectric detection unit and the second photoelectric detection unit are respectively disposed on the two-way conveyor and are used to detect whether the thickness of the material in the two-way conveyor reaches a predetermined thickness.

[0016] In the head stage, when the first photoelectric detection unit detects that the material in the two-way conveyor is lower than the first thickness, the two-way conveyor outputs the material to the second discharge end;

[0017] In the tail stage, when the second photoelectric detection unit detects that the material in the two-way conveyor is lower than the second thickness, the two-way conveyor outputs the material to the first discharge end and the storage device outputs the material to the third discharge end.

[0018] According to another specific embodiment of the present invention, the storage device includes a storage bin and a horizontal conveyor belt disposed at the bottom of the storage bin. The horizontal conveyor belt is disposed above the upstream end at the third discharge end;

[0019] The storage device further includes:

[0020] The infeed low-level detection unit and the infeed high-level detection unit are disposed on the side wall of the feed end of the storage bin and are used to detect the thickness of the material at the feed end falling into the storage bin;

[0021] The low-level discharge detection unit and the high-level discharge detection unit are arranged on the side wall of the storage bin at the third discharge end for detecting the thickness of the material at the third discharge end.

[0022] According to another specific embodiment of the present invention, it further includes a material distributing roller, which is arranged at the third discharge end and its axis extends along the width direction of the horizontal conveyor belt, and there is a gap between the material distributing roller and the horizontal conveyor belt.

[0023] According to another specific embodiment of the present invention, the inclination angle of the buffer conveyor relative to the horizontal plane is 20° - 30°.

[0024] According to another specific embodiment of the present invention, it further includes a limiting pipe, which is arranged between the downstream end of the buffer conveyor and the electronic belt scale; a light curtain detection sensor is provided on the limiting pipe for detecting the height of the material in the limiting pipe.

[0025] According to another specific embodiment of the present invention, it further includes a control unit, which is electrically connected to the motor of the buffer conveyor and the light curtain detection sensor respectively, and is used for receiving the signal of the light curtain detection sensor to control the running speed of the buffer conveyor.

[0026] According to another specific embodiment of the present invention, a blockage detection sensor is provided at the upper end of the limiting pipe, which is electrically connected to the control unit for detecting whether there is blockage in the limiting pipe.

[0027] According to another specific embodiment of the present invention, the two-way conveyor, the storage device and the buffer conveyor all adopt belt conveyors.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] According to the tobacco material conveying equipment provided by the present invention, by sequentially arranging a two-way conveyor, a storage device, a buffer conveyor and an electronic belt scale in the material conveying direction, and the buffer conveyor is inclinedly arranged, its upstream end is located below the two-way conveyor and the storage device, and its downstream end is located above the electronic belt scale. The material conveyed by the two-way conveyor directly falls on the lifting section of the buffer conveyor, and the buffer conveyor can directly lift the material to a high place and then fall onto the electronic belt scale. Therefore, the material does not pass through the horizontal section, and the material will not be tumbled and extruded, reducing the breakage amount of the batch material. In addition, a storage device is arranged below the two-way conveyor, and the head material can be stored in the storage device first. When the material becomes thinner at the tail stage, the tail material can be supplemented, so as to achieve the purpose of constant material flow control. Description of the Drawings

[0030] Figure 1 Shows a three-dimensional structural schematic diagram of the tobacco material conveying equipment provided by an embodiment of the present invention.

[0031] Description of the reference numerals in the drawings:

[0032] 1. Two-way conveyor, 11. First discharge end, 12. Second discharge end, 2. Storage device, 21. Storage bin, 22. Horizontal conveyor belt, 23. Third discharge end, 24. Deflector roller, 3. Buffer conveyor, 31. Upstream end, 32. Downstream end, 4. Electronic belt scale, 5. Limiting pipe, 61. First photoelectric detection unit, 62. Second photoelectric detection unit, 63. Inlet low-level detection unit, 64. Inlet high-level detection unit, 65. Discharge low-level detection unit, 66. Discharge high-level detection unit, 67. Light curtain detection sensor, 68. Blockage detection sensor. Specific embodiments

[0033] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. Although the description of the present utility model will be introduced in conjunction with the preferred embodiments, this does not mean that the features of this utility model are limited to this implementation manner. On the contrary, the purpose of introducing the utility model in conjunction with the implementation manner is to cover other alternatives or modifications that may be extended based on the claims of the present utility model. In order to provide a deep understanding of the present utility model, many specific details will be included in the following description. The present utility model can also be implemented without these details. In addition, in order to avoid confusing or obscuring the key points of the present utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0034] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0036] The terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0037] In the description of this embodiment, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific situations.

[0038] To make the objectives, technical solutions, and advantages of the present utility model clearer, the embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings.

[0039] As Figure 1 shown, Figure 1 is a schematic three-dimensional structure diagram of a tobacco material conveying device provided by an embodiment of the present utility model. In this embodiment, the tobacco material conveying device includes:

[0040] A two-way conveyor 1 for receiving materials and outputting the materials in the forward direction (as shown by the x direction in Figure 1 ) to the first discharge end 11 or outputting the materials in the reverse direction to the second discharge end 12;

[0041] A storage device 2 is arranged below the second discharge end 12 for receiving the materials falling from the second discharge end 12 and outputting the materials in the material conveying direction to the third discharge end 23 of the storage device 2;

[0042] A buffer conveyor 3 is inclinedly arranged and includes an upstream end 31 and a downstream end 32 along the material conveying direction. The upstream end 31 is arranged below the two-way conveyor 1 and the storage device 2 for receiving the materials falling from the second discharge end 12 and the third discharge end 23 and outputting the materials from the upstream end 31 to the downstream end 32;

[0043] An electronic belt scale 4 is arranged below the downstream end 32 of the buffer conveyor 3 for receiving the materials falling from the buffer conveyor 3.

[0044] With this technical solution, by sequentially arranging a two-way conveyor 1, a storage device 2, a buffer conveyor 3, and an electronic belt scale 4 in the material conveying direction, and the buffer conveyor 3 is arranged obliquely, its upstream end 31 is located below the two-way conveyor 1 and the storage device 2, and its downstream end 32 is located above the electronic belt scale 4. The material conveyed by the two-way conveyor 1 directly falls on the lifting section of the buffer conveyor 3, and the buffer conveyor 3 can directly lift the material to a high place and then fall it onto the electronic belt scale 4. Therefore, the material does not pass through the horizontal section, and the material will not be tumbled and squeezed, reducing the breakage amount of the batch material. In addition, a storage device 2 is arranged below the two-way conveyor 1, which can store the head material in the storage device 2 first. When the material becomes thinner at the tail stage, the tail material is supplemented, so as to achieve the purpose of constant material flow control.

[0045] Specifically, the two-way conveyor 1 extends horizontally along the material conveying direction and can output materials forward to the first discharge end 11 or backward to the second discharge end 12. The storage device 2 is arranged below the two-way conveyor 1 to receive the materials falling from the second discharge end 12 of the two-way conveyor 1 and output the materials along the material conveying direction to the third discharge end 23. The buffer conveyor 3 includes an inclined lifting section that extends between the upstream end 31 and the downstream end 32 to convey the materials to the downstream end 32 located at a high place. Among them, the upstream end 31 is located below the storage device 2 and the discharge end of the two-way conveyor 1, and the third discharge end 23 of the storage device 2 overlaps the upstream end 31. Since the two-way conveyor 1 is located above the storage device 2, the first discharge end 11 of the two-way conveyor 1 overlaps the position near the middle of the lifting section. Therefore, after the materials falling from the first discharge end 11 fall on the lifting section of the buffer conveyor 3, the lifting section directly lifts the materials to the downstream end 32 located obliquely above, and the materials will not be squeezed and tumbled at the bottom of the buffer conveyor 3, thereby reducing the breakage amount of the materials.

[0046] Exemplarily, when the material is in the head stage, the two-way conveyor 1 receives the material and outputs the material backward to the second discharge end 12, and the material falls from the second discharge end 12 into the storage device 2;

[0047] When the material is in the steady state stage and the tail stage, the two-way conveyor 1 receives the material and outputs the material forward to the first discharge end 11, and the material falls from the first discharge end 11 onto the buffer conveyor 3. After the buffer conveyor 3 lifts the material to the downstream end 32, the material falls from the downstream end 32 onto the electronic belt scale 4;

[0048] When the material is in the tail stage, it also includes the storage device 2 outputting the material to the third discharge end 23, and the material falls from the third discharge end 23 onto the buffer conveyor 3.

[0049] When the head material conveyed by the upstream process reaches the two-way conveyor 1, since the head material is less and cannot meet the requirement of constant material flow in the subsequent process, at this time, the two-way conveyor 1 runs in the reverse direction to output the material in the reverse direction to the second discharge end 12, and the material falls into the storage device 2 from the second discharge end 12 so as to output the material into the storage device 2 for temporary storage; in the steady state stage, the two-way conveyor 1 outputs the material in the forward direction to output the material onto the buffer conveyor 3; in the tail stage of the material, the two-way conveyor 1 and the storage device 2 convey the material to the buffer conveyor 3 at the same time. By adopting this technical solution, the head material is first stored in the storage device 2, and in the tail stage of the material, when the material begins to become thinner, the head material is output onto the buffer conveyor 3 to make up for the shortage of the tail material, so that the constant flow control of the whole batch of materials can be realized, and the coefficient of variation of the material flow of the electronic belt scale 4 in batches can be improved.

[0050] Further, it further includes:

[0051] The first photoelectric detection unit 61 and the second photoelectric detection unit 62 are respectively arranged on the two-way conveyor 1 and are used to detect whether the thickness of the material in the two-way conveyor 1 reaches a predetermined thickness.

[0052] In the head stage of the material, when the first photoelectric detection unit 61 detects that the material in the two-way conveyor 1 is lower than the first thickness, the two-way conveyor 1 outputs the material to the second discharge end 12.

[0053] In the tail stage of the material, when the second photoelectric detection unit 62 detects that the material in the two-way conveyor 1 is lower than the second thickness, the two-way conveyor 1 outputs the material to the first discharge end 11 and the storage device 2 outputs the material to the third discharge end 23.

[0054] Specifically, in this embodiment, it further includes a control unit, and both the first photoelectric detection unit 61 and the second photoelectric detection unit 62 are electrically connected to the control unit. Among them, the first photoelectric detection unit 61 is set according to the material thickness in the head stage of the material, and the second photoelectric detection unit 62 is set according to the material thickness in the tail stage of the material. In the head stage of the material, when the first photoelectric detection unit 61 is not blocked by the material, the two-way conveyor 1 outputs the material in the reverse direction to convey the material into the storage device 2; when the first photoelectric detection unit 61 is blocked by the material, it indicates that the incoming material enters the steady state stage, and the two-way conveyor 1 outputs the material to the buffer conveyor 3. In the tail stage of the material, when the second photoelectric detection unit 62 is not blocked by the material, it indicates that the incoming material becomes thinner. At this time, while the two-way conveyor 1 conveys the material to the buffer conveyor 3, the control unit controls the storage device 2 to output the material stored in the storage device 2 onto the buffer conveyor 3 to make up for the shortage of the tail material and realize the constant flow control of the whole batch of materials.

[0055] Further, the storage device 2 includes a storage bin 21 and a horizontal conveyor belt 22 disposed at the bottom of the storage bin 21. The horizontal conveyor belt 22 is disposed above the upstream end 31 at the third discharge end 23.

[0056] The storage device 2 is further provided with:

[0057] A feeding low-level detection unit 63 and a feeding high-level detection unit 64, which are disposed on the side wall of the feeding end of the storage bin 21 and are used for detecting the thickness of the material at the feeding end falling into the storage bin 21.

[0058] A discharging low-level detection unit 65 and a discharging high-level detection unit 66, which are disposed on the side wall of the storage bin 21 at the third discharge end 23 and are used for detecting the thickness of the material at the third discharge end 23.

[0059] Specifically, the feeding low-level detection unit 63 and the feeding high-level detection unit 64 are disposed at the feeding end of the storage bin 21 and are both electrically connected to the control unit. The feeding low-level detection unit 63 is used to identify the entry of material, and when the feeding high-level detection unit 64 detects the material, it means that the material has reached a certain thickness at the feeding end. In order to prevent the material from piling up at the feeding end, the control unit controls the storage device 2 to run step by step in the material conveying direction to convey the material to the third discharge end 23.

[0060] The discharging low-level detection unit 65 and the discharging high-level detection unit 66 are disposed at the third discharge end 23 of the storage bin 21 and are both electrically connected to the control unit. Optionally, the discharging low-level detection unit 65 and the discharging high-level detection unit 66 are disposed at a position two-thirds of the distance from the feeding end of the storage bin. The discharging low-level detection unit 65 is used to identify whether there is still material in the storage bin 21, and the discharging high-level detection unit 66 is used to detect whether there is material at the third discharge end 23 of the storage bin 21. If the discharging high-level detection unit 66 does not detect the material, the horizontal conveyor belt 22 needs to convey the material to the third discharge end 23, so that when the material needs to be discharged at the end stage of the material, the storage device 2 can send out the material, avoiding the influence of long-term material waiting on the material flow rate and ensuring the realization of constant material flow control.

[0061] Further, it further includes a dialing roller 24, which is disposed at the third discharge end 23 and whose axis extends along the width direction of the horizontal conveyor belt 22. There is a gap between the dialing roller 24 and the horizontal conveyor belt 22.

[0062] Specifically, the material feeding roller 24 includes a roller shaft and a plurality of rake nails. Among them, the roller shaft extends along the width direction of the horizontal conveyor belt 22, and the roller shaft can rotate around its own axis; the end of each rake nail is fixed on the roller shaft and arranged on the circumferential surface of the roller shaft along a spiral trajectory. When the roller shaft rotates, each rake nail contacts the material. By arranging each rake nail on the circumferential surface of the roller shaft along a spiral trajectory, the rake nails can uniformly contact the material during the rotation of the material feeding roller 24, thereby enhancing the material leveling effect of the material feeding roller 24.

[0063] Further, the inclination angle of the buffer conveyor 3 with respect to the horizontal plane is 20° to 30°.

[0064] Adopting this technical solution can avoid the material from sliding down while ensuring the material is lifted.

[0065] Further, it further includes a limiting pipe 5, which is arranged between the downstream end 32 of the buffer conveyor 3 and the electronic belt scale 4; a light curtain detection sensor 67 is provided on the limiting pipe 5 for detecting the height of the material in the limiting pipe 5.

[0066] Specifically, the upper end of the limiting pipe 5 is joined to the downstream end 32 of the buffer conveyor 3, and the lower end of the limiting pipe 5 is joined to the electronic belt scale 4. Thus, after the buffer conveyor 3 lifts the material to a high place, the material falls onto the electronic belt scale 4 through the limiting pipe 5.

[0067] Further, the control unit is electrically connected to both the motor of the buffer conveyor 3 and the light curtain detection sensor 67, and is used for receiving the signal of the light curtain detection sensor 67 to control the running speed of the buffer conveyor 3.

[0068] Specifically, after receiving the height of the material in the limiting pipe 5 detected by the light curtain detection sensor 67, the control unit controls the running speed of the buffer conveyor 3 in real time according to the height of the material in the limiting pipe 5 to achieve constant flow control of the material. Optionally, the motor of the buffer conveyor 3 is a variable frequency drive motor.

[0069] Exemplarily, in this embodiment, when the light curtain detection sensor 67 detects that the material in the limiting pipe 5 is 30%-49% of the height of the limiting pipe 5, the control unit controls the buffer conveyor 3 to run at a low speed; when the light curtain detection sensor 67 detects that the material in the limiting pipe 5 is 50%-79% of the height of the limiting pipe 5, the control unit controls the buffer conveyor 3 to run at a medium speed; when the light curtain detection sensor 67 detects that the material in the limiting pipe 5 is 80%-100% of the height of the limiting pipe 5, the control unit controls the buffer conveyor 3 to run at a high speed.

[0070] Further, a blockage detection sensor 68 is provided at the upper end of the limiting pipe 5 and is electrically connected to the control unit for detecting whether there is a blockage in the limiting pipe 5.

[0071] To avoid material blockage in the metering pipe 5, a blockage detection sensor 68 is provided at the upper end of the metering pipe 5. The blockage detection sensor 68 is electrically connected to the control unit, and the control unit is also electrically connected to the motors of the two-way conveyor 1, the storage device 2, and the buffer conveyor 3. When the blockage detection sensor 68 detects materials, it sends a blockage signal to the control unit. After receiving the blockage signal, the control unit controls the two-way conveyor 1, the storage device 2, and the buffer conveyor 3 to stop, so as to effectively detect the blockage situation in the metering pipe 5.

[0072] Furthermore, in this embodiment, the two-way conveyor 1, the storage device 2, and the buffer conveyor 3 all adopt belt conveyors. Since there are gaps between the traditional side-chain lifting belts and the side walls, it is easy to leak materials during the material conveying process. Therefore, in this embodiment, all conveyors adopt belt conveyors. Since there are no gaps between the belts and the side walls, material leakage can be avoided and material waste can be reduced.

[0073] Optionally, the belt is provided with patterns to increase the friction between the materials and the belt and avoid material leakage.

[0074] Furthermore, in this embodiment, the first photoelectric detection unit 61, the second photoelectric detection unit 62, the feeding low-level detection unit 63, the feeding high-level detection unit 64, the discharging low-level detection unit 65, the discharging high-level detection unit 66, and the blockage detection sensor 68 are all opposed-type photoelectric detection switches. Adopting this technical solution has a lower cost and is convenient for installation and debugging.

[0075] According to the tobacco material conveying equipment provided by the present invention, the breakage amount of batch materials can be reduced, and material leakage and cost waste can be avoided.

[0076] Although the present invention has been illustrated and described by referring to some preferred embodiments of the present invention, those of ordinary skill in the art should understand that the above content is a further detailed description of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. Those skilled in the art can make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A tobacco material conveying device, characterized in that Comprising: A two-way conveyor (1) for receiving materials and outputting the materials in the forward direction along the material conveying direction to a first discharge end (11) or in the reverse direction to a second discharge end (12); A storage device (2) arranged below the second discharge end (12) for receiving the materials falling from the second discharge end (12) and outputting the materials in the material conveying direction to a third discharge end (23) of the storage device (2); A buffer conveyor (3) which is inclined and includes an upstream end (31) and a downstream end (32) along the material conveying direction. The upstream end (31) is arranged below the two-way conveyor (1) and the storage device (2) for receiving the materials falling from the second discharge end (12) and the third discharge end (23) and outputting the materials from the upstream end (31) to the downstream end (32); An electronic belt scale (4) arranged below the downstream end (32) of the buffer conveyor (3) for receiving the materials falling from the buffer conveyor (3).

2. The tobacco material conveying device according to claim 1, characterized in that When the material is in the head stage, the two-way conveyor (1) receives the material and outputs the material in the reverse direction to the second discharge end (12), and the material falls into the storage device (2) from the second discharge end (12); When the material is in the steady state stage and the tail stage, the two-way conveyor (1) receives the material and outputs the material in the forward direction to the first discharge end (11), and the material falls from the first discharge end (11) onto the buffer conveyor (3). After the buffer conveyor (3) lifts the material to the downstream end (32), the material falls from the downstream end (32) onto the electronic belt scale (4); When the material is in the tail stage, the storage device (2) also outputs the material to the third discharge end (23), and the material falls from the third discharge end (23) onto the buffer conveyor (3).

3. The tobacco material conveying device according to claim 1 or 2, characterized in that Also comprising: A first photoelectric detection unit (61) and a second photoelectric detection unit (62) respectively arranged on the two-way conveyor (1) for detecting whether the thickness of the material in the two-way conveyor (1) reaches a predetermined thickness, In the head stage, when the first photoelectric detection unit (61) detects that the material in the two-way conveyor (1) is lower than a first thickness, the two-way conveyor (1) outputs the material to the second discharge end (12); In the tail stage, when the second photoelectric detection unit (62) detects that the material in the two-way conveyor (1) is lower than a second thickness, the two-way conveyor (1) outputs the material to the first discharge end (11) and the storage device (2) outputs the material to the third discharge end (23).

4. The tobacco material conveying device according to claim 1 or 2, characterized in that, The storage device (2) includes a storage bin (21) and a horizontal conveyor belt (22) arranged at the bottom of the storage bin (21). The horizontal conveyor belt (22) is arranged above the upstream end (31) at the third discharge end (23); The storage device (2) also is provided with: The incoming material low-level detection unit (63) and the incoming material high-level detection unit (64) are arranged on the side wall of the feeding end of the storage bin (21) and are used to detect the thickness of the material at the feeding end falling into the storage bin (21). The discharging low-level detection unit (65) and the discharging high-level detection unit (66) are arranged on the side wall of the storage bin (21) at the third discharging end (23) and are used to detect the thickness of the material at the third discharging end (23).

5. The tobacco material conveying device according to claim 4, characterized in that, It further includes a material distributing roller (24) which is arranged at the third discharging end (23) and whose axis extends along the width direction of the horizontal conveyor belt (22), and there is a gap between the material distributing roller (24) and the horizontal conveyor belt (22).

6. The tobacco material conveying device according to claim 1 or 2, characterized in that, The inclination angle of the buffer conveyor (3) relative to the horizontal plane is 20° - 30°.

7. The tobacco material conveying device according to claim 1 or 2, characterized in that It further includes a limiting pipe (5) which is arranged between the downstream end (32) of the buffer conveyor (3) and the electronic belt scale (4); a light curtain detection sensor (67) is arranged on the limiting pipe (5) and is used to detect the height of the material in the limiting pipe (5).

8. The tobacco material conveying device according to claim 7, wherein, It further includes a control unit which is electrically connected to both the motor of the buffer conveyor (3) and the light curtain detection sensor (67), and is used to receive the signal of the light curtain detection sensor (67) to control the running speed of the buffer conveyor (3).

9. The tobacco material conveying device according to claim 8, characterized in that, A blockage detection sensor (68) is arranged at the upper end of the limiting pipe (5) and is electrically connected to the control unit and is used to detect whether blockage occurs in the limiting pipe (5).

10. The tobacco material conveying device according to claim 1, characterized in that The bidirectional conveyor (1), the storage device (2) and the buffer conveyor (3) all adopt belt conveyors.

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