Reconstituted tobacco powder metering storage and uniform mixing system

Abstract

The utility model provides a reconstituted tobacco powder metering storage and uniform mixing system which comprises a support and is characterized in that a plurality of powder metering storage tanks are arranged on the support, and a confluence conveyor with a plurality of feed ports and a discharge port is connected below the powder metering storage tanks. A flexible connecting pipe is arranged between discharging ports of the powder metering storage tanks and a corresponding feeding port of the confluence conveyor, a discharging port of the confluence conveyor is connected with one end of the negative pressure conveying pipe, the other end of the negative pressure conveying pipe is connected with a feeding port of the vacuum feeder, and a discharging port of the vacuum feeder is connected with a feeding port of the powder mixer. Different materials can be conveniently and accurately conveyed to the confluence conveyor according to the formula amount to complete powder conveying and preliminary mixing, then the powder is conveyed into the vacuum feeder and then conveyed into the powder mixer to be evenly mixed and then discharged, and formula mixing cannot be caused.

Description

Technical Field

[0001] The utility model relates to a reconstituted tobacco leaf powder metering storage and uniform mixing system, belonging to the technical field of reconstituted tobacco leaf preparation. Background Art

[0002] Reconstructed tobacco, also known as tobacco flakes or reconstituted tobacco, is a regenerated tobacco product that uses tobacco flakes, tobacco dust, tobacco stems, etc. as raw materials and is processed to recombine them into continuous flakes. Its performance is similar to that of native tobacco, and some are even better than native tobacco. When reconstructed tobacco is used in cigarettes, it can only be added as an auxiliary material in traditional cigarette production, and the amount used is only 10% of native tobacco. It is precisely because of the small amount of blending that it has little effect on the taste of cigarettes. Therefore, the existing technology does not pay attention to the accuracy and uniformity of the formula of tobacco raw materials used in reconstructed tobacco. However, when reconstructed tobacco is used as a heated cigarette, it becomes the main material of the heated cigarette, and its precise tobacco raw material formula will directly determine the taste of the heated cigarette. On the other hand, the particle size of tobacco powder has a greater influence on the bulk and density of thick slurry reconstructed tobacco, so it is necessary to accurately blend tobacco powders of different particle sizes according to the set ratio. Therefore, the production process of reconstituted tobacco for heated cigarettes requires the use of a mixing system with precise powder formula to ensure the accuracy of the powder formula and the uniformity of the powder mixing. Utility Model Content

[0003] The utility model aims to provide a reconstituted tobacco leaf powder metering storage and uniform mixing system to ensure the accuracy of the reconstituted tobacco leaf powder formula and the mixing uniformity of the powder.

[0004] In order to achieve the above-mentioned purpose, the utility model is realized by the following technical scheme: a reconstituted tobacco leaf powder metering storage and uniform mixing system, comprising a bracket, characterized in that a plurality of powder metering storage tanks are arranged on the bracket, a converging conveyor with a plurality of feed ports and a discharge port is connected below the plurality of powder metering storage tanks, a flexible connecting pipe is arranged between the discharge ports of the plurality of powder metering storage tanks and the corresponding feed ports of the converging conveyor, the discharge port of the converging conveyor is connected to one end of a negative pressure conveying pipe, the other end of the negative pressure conveying pipe is connected to the feed port of a vacuum feeder, the drop port of the vacuum feeder is connected to the feed port of a powder mixer, so that the plurality of powder metering storage tanks can be uniformly mixed with the powder material. The tank simultaneously delivers different materials to the converging conveyor accurately according to the formula quantity, and the materials are mixed with powders while being conveyed in the converging conveyor, and then sent out through the discharge port of the converging conveyor to achieve preliminary mixing of the materials. Afterwards, under the action of negative pressure gas, the powder is sent from the converging conveyor to the vacuum feeder through the negative pressure pipe. The powder is hindered by the partition and the filter installed on the partition during the rising process with the gas, and then falls down by its own weight and enters the powder mixer through the cross-gate dropper to complete uniform mixing and then be discharged. The gas is filtered into clean air through the filter and enters the clean air bin, and then is discharged through the negative pressure air outlet.

[0005] The powder metering storage tank comprises: a tank body with a cavity, a feed cover plate located on the upper part of the tank body, a rotating scraper mechanism and a discharge port located at the bottom of the tank body, a bidirectional screw conveyor located below the discharge port, and a weighing sensor arranged outside or at the bottom of the tank body, wherein:

[0006] The feed cover plate includes: a cover plate body, and a feed port, an observation hole, and a ventilation device with a filter on the cover plate body; the feed port is connected to the conveying equipment above through a flexible connection;

[0007] The rotary scraper mechanism comprises: a driving reduction motor installed under the bottom plate of the tank body, a material guide cone directly installed on the shaft of the driving reduction motor, a detachable cone cap installed on the upper part of the material guide cone, a sealing ring installed at the bottom of the material guide cone and a scraper plate; the scraper plate is provided as one or more pieces;

[0008] The upper opening of the discharge port is small and the lower opening is large. A plug plate is provided on the upper part of the discharge port. The plug plate is a horizontal plate and can be an electric, pneumatic or manual horizontal plate.

[0009] The bidirectional screw conveyor has a feed port in the middle and two discharge ports at the ends. The feed port is connected to the discharge port of the tank. The screw rod in the bidirectional screw conveyor is connected to the reduction motor. One of the two discharge ports of the bidirectional screw conveyor is connected to one of the feed ports of the converging conveyor through a soft connection, and the other is an outlet for excess powder.

[0010] The weighing sensor is arranged on the outside or the bottom of the tank body. There are two or more weighing sensors, and the tank body and all the components thereon are suspended on the bracket through the weighing sensors.

[0011] The flexible connecting pipe is a flexible connecting piece between the tank body and the converging conveyor;

[0012] The converging conveyor is one of the following: a screw conveyor, a belt conveyor, a tube chain conveyor, a pipeline conveyor, and a negative pressure pipeline conveyor.

[0013] The discharge port of the converging conveyor is tightly connected to the vacuum feeder by a negative pressure pipe, the inner wall of the negative pressure pipe is a mirror wall, and is connected by a soft transparent pipe at at least one vertical straight pipe of the negative pressure pipe.

[0014] The vacuum feeder comprises: a shell with a powder and gas mixing chamber, a cross-gate feeder arranged at the discharge port at the bottom of the shell, a filter, a back-blowing mechanism, a partition, a clean air chamber, a negative pressure air outlet, and a feed port arranged in the middle of the shell, and an air hammer arranged on the outer wall of the shell; wherein:

[0015] The partition and the filter installed on the partition separate the powder and gas mixing chamber and the clean air chamber into two chambers;

[0016] An ordinary fan, a vortex air pump or a Roots air pump is connected to the negative pressure air outlet and provides negative pressure to the vacuum feeder;

[0017] The back-blowing mechanism is connected to the compressed air machine.

[0018] The powder mixer comprises: a shell with a cavity, a feed port arranged at the top of the shell and fixedly connected to the cross-gate feeder of the vacuum feeder, a mixer arranged in the cavity, the mixer is a ribbon mixer, a plowshare mixer or a gravity-free mixer, a feed port arranged at the bottom of the shell, and a valve is provided on the feed port; wherein: the mixer comprises a driving reduction motor, a stirring shaft connected to the output shaft of the driving reduction motor, and an outer spiral blade and an inner spiral blade fixedly connected to the stirring shaft.

[0019] The vacuum feeder is connected to two powder mixers through a distributor. The distributor is composed of a one-way pipe, a two-way pipe and a three-way pipe to form a three-way pipe that is interconnected, and a rotating material guide plate is provided in the three-way pipe, wherein: the one-way pipe is a feed port and is connected to a cross-gate feeder of the vacuum feeder, and the two-way pipe and the three-way pipe are respectively connected to the feed ports of the two powder mixers to realize continuous feeding.

[0020] The utility model has the following advantages and effects:

[0021] 1. According to the powder formula requirements required for production, different types and quantities of powders are stored in corresponding powder metering storage tanks, so that each powder metering storage tank only stores a single type of powder, which will not cause formula mixing problems;

[0022] 2. Before the powders are mixed according to the formula, all the powders are first sent to their respective powder metering tanks. Their respective weighing systems weigh the total weight X of the powder metering tanks and the powders therein, and then the powders stored in the powder metering tanks are sent out according to the formula weight Z. During the discharging process, the weighing system weighs the sum of the weights Y of the powder metering tanks and the powders in the current tanks in real time. When XY=Z, the powder metering tanks stop discharging;

[0023] 3. The powder metering storage tanks are arranged in groups in sequence. One of the spiral discharge ports of each powder metering storage tank in one or two groups of powder metering storage tanks is connected to multiple feed ports of a screw conveyor. The powder metering storage tanks containing different powders are quantitatively fed to a converging conveyor at the same time according to the formula requirements, which is highly efficient.

[0024] 4. The discharge port of the conveyor is connected to the negative pressure pipe feed port of a vacuum feeder, and all the formula powders are sent to the discharge port of the vacuum feeder at the same time. This process realizes the preliminary premixing of the powders;

[0025] 5. The powder falling from the discharge port of the vacuum discharger is sent to a powder mixer, in which the powder is evenly mixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a system diagram of the utility model;

[0027] Figure 2 for Figure 1 The structure diagram of the powder metering storage tank in the figure;

[0028] Figure 3 for Figure 2 Left view of

[0029] Figure 4 This is another schematic diagram of the layout of the vacuum feeder and powder mixer. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the accompanying drawings.

[0031] The devices or structures not particularly described in the present invention are all conventional devices or structures.

[0032] The utility model provides a reconstituted tobacco leaf powder metering storage and uniform mixing system, comprising a bracket 2, on which a plurality of powder metering storage tanks 1 are arranged, a converging conveyor 4 with a plurality of feed ports and a discharge port is connected below the plurality of powder metering storage tanks 1, a flexible connecting pipe 3 is arranged between the discharge ports of the plurality of powder metering storage tanks 1 and the corresponding feed ports of the converging conveyor 4, the discharge port of the converging conveyor 4 is connected to one end of a negative pressure conveying pipe 5, the other end of the negative pressure conveying pipe 5 is connected to the feed port of a vacuum feeder 6, and the drop port of the vacuum feeder 6 is connected to the feed port of a powder mixer 7;

[0033] The powder metering storage tank 1 is a conventional device, which includes: a tank body 11 with a cavity, a feed cover plate located on the upper part of the tank body 11, a rotating scraper mechanism 13 and a discharge port 14 located at the bottom of the tank body 11, a bidirectional screw conveyor 15 located below the discharge port 14, and a weighing sensor 16 provided on the outside or bottom of the tank body 11, wherein:

[0034] The feed cover plate includes: a cover plate body 121, and a feed port 122, an observation hole 123, and a ventilator 124 with a filter on the cover plate body 121; the cover plate body 121 is detachable to facilitate installation and maintenance of the rotating material hanging mechanism 13 inside the tank body 11, and to facilitate cleaning of the tank body 11 cavity; the feed port 122 is connected to the conventional conveying equipment above through a flexible connection to feed materials into the tank body 11 cavity, and the flexible connection can avoid affecting the weighing accuracy of the tank body 11 and the powder inside; the observation hole 123 is used to check and observe the internal situation of the tank body 11, and the ventilator 124 with a filter is used to balance the air pressure inside and outside the tank body 11 when feeding;

[0035] The rotary scraper mechanism 13 comprises: a driving reduction motor 131 installed below the bottom plate 111 of the tank body 11, a guide cone 133 directly installed on the shaft of the driving reduction motor 131, a detachable cone cap 132 installed on the upper part of the guide cone 133, a sealing ring 134 and a scraper plate 135 installed at the bottom of the guide cone 133; so that the guide cone 133 is driven by the driving reduction motor 131 to rotate, and during the rotation process, the cone structure formed by the cone cap 132 and the guide cone 133 allows the powder to quickly slide to the periphery of the bottom of the tank body 11 and be located in the working space of the scraper plate 135, so that the scraper plate 135 can be easily removed during the rotation of the guide cone 133. During the process, the powder is scraped to the discharge port 14 for discharge; the cone cap 132 is connected to the guide cone 133 by screws; the sealing ring 134 fixed to the bottom of the guide cone 133 is used to mechanically seal the bottom of the guide cone 133 with the bottom plate 111 of the tank body 11 and the motor mounting plate 112, effectively preventing the powder from entering the motor mounting plate 112 and wearing the motor shaft; the scraper plate 135 is fixed to the bottom of the guide cone 133, so that the scraper plate 135 can scrape the powder to the discharge port 14 during the rotation of the guide cone 133, and the powder is discharged from the discharge port 14 under the action of gravity; the scraper plate 135 can be 1, 2 or more pieces, and the number is related to the rotation speed and production capacity;

[0036] The upper opening of the discharge port 14 is small and the lower opening is large, which can effectively prevent the powder from bridging at the discharge port 14. A plug plate 141 is provided on the upper part of the discharge port 14. The plug plate 141 is a horizontal plate. When it is in a closed state, even if the scraper plate 135 rotates continuously, the material will not be discharged from the discharge port 14. Only when the plug plate 141 is in an open state, the material will be discharged from the discharge port 14 under the action of the scraper plate 135; the plug plate 141 can be an electric, pneumatic or manual horizontal plate;

[0037] The bidirectional screw conveyor 15 has a feed port 151 in the middle and two discharge ports 154, 155 at the ends. The feed port 151 is connected to the discharge port 14 of the tank body 11. The powder in the tank body 11 enters the bidirectional screw conveyor 15 through the discharge port 14 under the action of the scraper plate 135. The screw rod 152 in the bidirectional screw conveyor 15 is connected to the reduction motor 153. When the screw rod 152 rotates forward, the powder entering the bidirectional screw conveyor 15 is discharged from the screw rod 152. When the screw rod 152 rotates in the opposite direction, the powder entering the bidirectional screw conveyor 15 is delivered from its discharge port 155; one of the two discharge ports 154 and 155 of the bidirectional screw conveyor 15 is connected to one of the feed ports of the converging conveyor 4 through the flexible connection 3, and is used for the powder metering storage tank 1 to feed the converging conveyor 4, and the other is used to deliver the excess powder in the powder metering storage tank 1 after the production is completed, and collect it in a container so as to discharge the powder cleanly;

[0038] The weighing sensors 16 are evenly distributed on the outside or bottom of the tank body 11. There may be one or more weighing sensors 16. The tank body 11 and all the components thereon are suspended on the bracket 2 by the weighing sensors 16, so as to accurately weigh the weight of the tank body 11 and all the components installed thereon and the powder in the tank body 11.

[0039] The flexible connection pipe 3 realizes the flexible connection between the tank body 11 and the converging conveyor 4, which prevents the powder from overflowing on the one hand, and avoids interfering with the weighing accuracy of the weighing sensor 16 on the tank body 11 on the other hand;

[0040] The converging conveyor 4 is one or more of a conventional screw conveyor, a belt conveyor, a tube chain conveyor, a pipeline conveyor, and a negative pressure pipeline conveyor, preferably a shaftless screw conveyor, in order to prevent material accumulation in the equipment, reduce raw material loss, and reduce the difficulty of cleaning;

[0041] So that multiple tanks 11 can simultaneously accurately deliver different materials to the converging conveyor 4 according to the formula amount, and the materials are mixed with powders while being conveyed under the rotation of the shaftless screw 42 in the converging conveyor 4, and then sent out through the discharge port 43 of the converging conveyor 4, so as to achieve preliminary mixing of the materials;

[0042] The discharge port 43 of the converging conveyor 4 is sealedly connected to the vacuum feeder 6 by a negative pressure pipe 5, and the powder delivered by the converging conveyor 4 is delivered to the vacuum feeder 6 through the vacuum feeder 6 and the negative pressure pipe 5; the inner wall of the negative pressure pipe 5 is a mirror wall to ensure that the conveying is frictionless and residue-free, and a large radius elbow 51 is used at the turning point to reduce the flow resistance. A soft transparent tube 52 is used for connection at at least one vertical straight pipe of the negative pressure pipe 5, which is convenient for observing the powder conveying situation and can effectively reduce the vibration caused by the rigid pipe connection;

[0043] The vacuum feeder 6 is a conventional device, which includes: a shell with a powder and gas mixing chamber 62, a cross-gate feeder 61 arranged at the discharge port at the bottom of the shell, a filter 63 arranged on the upper part of the powder and gas mixing chamber 62 from bottom to top, a back-blowing mechanism 64, a partition 67, a clean air chamber 65, a negative pressure air outlet 66, and a feed port 68 arranged in the middle of the shell, and an air hammer 69 arranged on the outer wall of the shell; wherein: the partition 67 and the filter 63 installed on the partition 67 separate the powder and gas mixing chamber 62 and the clean air chamber 65 into two chambers, and under the action of the negative pressure gas, the powder is fed through the negative pressure pipe 5 through the feed port 68. The powder is fed into the powder and gas mixing bin 62 through the feed port 68. The powder is blocked by the partition 67 and the filter 63 installed on the partition 67 during the rising process with the gas, and then falls down by its own weight and enters the powder mixer 7 through the cross-gate feeder 61. The gas is filtered into clean air by the filter 63 and then enters the clean air bin 65, and then discharged through the negative pressure air outlet 66. The ordinary fan or vortex air pump or Roots air pump is connected to the negative pressure air outlet 66 and provides negative pressure to the vacuum feeder 6. The back-blowing mechanism 64 is connected to the compressed air machine so as to regularly back-blow compressed air to the filter 63 to prevent the filter 3 from being blocked.

[0044] The powder mixer 7 is a conventional device, which includes: a shell with a cavity, a feed port 73 arranged at the top of the shell and fixedly connected to the cross-gate feeder 61 of the vacuum feeder 6, a spiral ribbon mixer, a plow blade mixer or a weightless mixer arranged in the cavity. The present embodiment uses a spiral ribbon mixer, which includes: a driving reduction motor 74, a stirring shaft 77 connected to the output shaft of the driving reduction motor 74, and an outer spiral blade 72 and an inner spiral blade 71 fixedly connected to the stirring shaft 77, so that after the powder in the vacuum feeder 6 enters the cavity of the powder mixer 7 through the cross-gate feeder 61 and the feed port 73, when the stirring shaft 77 rotates, the powder is continuously pushed from the middle to the periphery by the inner spiral blade 71, and then the powder is continuously pushed from the periphery to the middle by the outer spiral blade 72, so that uniform mixing of the powder can be achieved, and then the valve driven by the cylinder 75 is opened to discharge the uniformly mixed powder from the feed port 76.

[0045] In order to achieve continuous production, the present embodiment also provides the following usage: two powder mixers 7 are arranged in parallel, and a distributor 8 is set between a vacuum feeder 6 and the two powder mixers 7. The distributor 8 is composed of a through pipe 82, a two-way pipe 83, and a three-way pipe 84 to form a three-way interconnected with each other, and a rotating guide plate 81 is provided in the three-way. The one-way pipe 82 is a feed port and is connected to the cross-gate dropper 61 of the vacuum feeder 6. The two-way pipe 83 and the three-way pipe 84 are respectively connected to the feed ports 73 of the two powder mixers 7. The two powder mixers 7 are selectively fed by the rotating guide plate 81, so that one powder mixer 7 mixes and feeds to the subsequent process while the other powder mixer 7 receives the powder, and so on and so forth, so as to achieve continuous feeding of the subsequent process.

Claims

1. A system for measuring, storing and uniformly mixing reconstituted tobacco leaf powder, comprising a support, characterized in that A plurality of powder metering storage tanks are arranged on the bracket, and a converging conveyor with a plurality of feed ports and a discharge port is connected to the lower part of the plurality of powder metering storage tanks, and a flexible connecting pipe is arranged between the discharge ports of the plurality of powder metering storage tanks and the corresponding feed ports of the converging conveyor, the discharge port of the converging conveyor is connected to one end of a negative pressure conveying pipe, and the other end of the negative pressure conveying pipe is connected to the feed port of a vacuum feeder, and the dropping port of the vacuum feeder is connected to the feed port of a powder mixer.

2. A reconstituted tobacco leaf powder metering, storage and uniform mixing system as claimed in claim 1, characterized in that The powder metering storage tank comprises: a tank body with a cavity, a feed cover plate located on the upper part of the tank body, a rotating scraper mechanism and a discharge port located at the bottom of the tank body, a bidirectional screw conveyor located below the discharge port, and a weighing sensor arranged outside or at the bottom of the tank body, wherein: The feed cover plate includes: a cover plate body, and a feed port, an observation hole, and a ventilation device with a filter on the cover plate body; the feed port is connected to the conveying equipment above through a flexible connection; The rotary scraper mechanism comprises: a driving reduction motor installed under the bottom plate of the tank body, a material guide cone directly installed on the shaft of the driving reduction motor, a cone cap installed on the upper part of the material guide cone, a sealing ring installed on the bottom of the material guide cone and a scraper plate; the scraper plate is provided as one or more pieces; The upper opening of the discharge port is small and the lower opening is large. A plug plate is provided on the upper part of the discharge port. The plug plate is a horizontal plate and can be an electric, pneumatic or manual horizontal plate. The bidirectional screw conveyor has a feed port in the middle and two discharge ports at the ends. The feed port is connected to the discharge port of the tank. The screw rod in the bidirectional screw conveyor is connected to the reduction motor. One of the two discharge ports of the bidirectional screw conveyor is connected to one of the feed ports of the converging conveyor through a soft connection, and the other is an outlet for excess powder. The weighing sensor is arranged on the outside or the bottom of the tank body. There are two or more weighing sensors, and the tank body and all the components thereon are suspended on the bracket through the weighing sensors. The converging conveyor is one of the following: a screw conveyor, a belt conveyor, a tube chain conveyor, a pipeline conveyor, and a negative pressure pipeline conveyor.

3. A reconstituted tobacco leaf powder metering, storage and uniform mixing system as claimed in claim 1, characterized in that The discharge port of the converging conveyor is tightly connected to the vacuum feeder by a negative pressure pipe, the inner wall of the negative pressure pipe is a mirror wall, and is connected by a soft transparent pipe at at least one vertical straight pipe of the negative pressure pipe.

4. A reconstituted tobacco leaf powder metering, storage and uniform mixing system as claimed in claim 1, characterized in that The vacuum feeder comprises: a shell with a powder and gas mixing chamber, a cross-gate feeder arranged at the discharge port at the bottom of the shell, a filter, a back-blowing mechanism, a partition, a clean air chamber, a negative pressure air outlet, and a feed port arranged in the middle of the shell, and an air hammer arranged on the outer wall of the shell; wherein: The partition and the filter installed on the partition separate the powder and gas mixing chamber and the clean air chamber into two chambers; An ordinary fan, a vortex air pump or a Roots air pump is connected to the negative pressure air outlet and provides negative pressure to the vacuum feeder; The back-blowing mechanism is connected to the compressed air machine.

5. A reconstituted tobacco leaf powder metering, storage and uniform mixing system as claimed in claim 1, characterized in that The powder mixer comprises: a shell with a cavity, a feed port arranged at the top of the shell and fixedly connected to the cross-gate feeder of the vacuum feeder, a mixer arranged in the cavity, the mixer is a ribbon mixer, a plowshare mixer or a gravity-free mixer, a feed port arranged at the bottom of the shell, and a valve is provided on the feed port; wherein: the mixer comprises a driving reduction motor, a stirring shaft connected to the output shaft of the driving reduction motor, and an outer spiral blade and an inner spiral blade fixedly connected to the stirring shaft.

6. A reconstituted tobacco leaf powder metering, storage and uniform mixing system as claimed in claim 1, characterized in that The vacuum feeder is connected to two powder mixers through a distributor. The distributor is composed of a one-way pipe, a two-way pipe and a three-way pipe to form a three-way pipe that is interconnected, and a rotating material guide plate is provided in the three-way pipe, wherein: the one-way pipe is a feed port and is connected to a cross-gate feeder of the vacuum feeder, and the two-way pipe and the three-way pipe are respectively connected to the feed ports of the two powder mixers.

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