CN110786536A - Vacuum tube type tobacco stem microwave expansion device and control method - Google Patents
Vacuum tube type tobacco stem microwave expansion device and control method Download PDFInfo
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- CN110786536A CN110786536A CN201811183725.3A CN201811183725A CN110786536A CN 110786536 A CN110786536 A CN 110786536A CN 201811183725 A CN201811183725 A CN 201811183725A CN 110786536 A CN110786536 A CN 110786536A
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B5/00—Stripping tobacco; Treatment of stems or ribs
- A24B5/16—Other treatment of stems or ribs, e.g. bending, chopping, incising
Abstract
The invention discloses a vacuum tube type tobacco stem microwave expansion device and a control method thereof, comprising a microwave expansion device for microwave expansion of tobacco stems, a sealing feeding device and a sealing discharging device, wherein the sealing feeding device is hermetically communicated with an inlet of the microwave expansion device, and the sealing discharging device is hermetically communicated with an outlet of the microwave expansion device; the device also comprises a vacuumizing device for vacuumizing the microwave expansion device and/or the sealed feeding device and/or the sealed discharging device. The invention adopts the vacuum technology and the special tubular microwave expansion technology, greatly improves the defects of easy carbonization and uneven expansion of the expanded tobacco stems, has uniform expansion rate of the tobacco stems, basically no carbonization of the cut stems, low breakage rate of the cut stems and improves the utilization rate of the tobacco stems.
Description
Technical Field
The invention belongs to the technical field of tobacco processing, and particularly relates to a vacuum tube type tobacco stem microwave expansion device and a control method.
Background
In order to reduce the tobacco consumption, enterprises blend tobacco stems in cigarette formulas at higher and higher proportions, and develop and utilize tobacco stems which are not used in large quantities step by investing large quantities of manpower and material resources. For the expansion of tobacco stems, currently, tobacco enterprises in China mainly adopt a high-temperature high-humidity treatment process to prepare cut stems. Namely, tobacco stems are moistened in a heating state, then the tobacco stems are cut into shreds, and then tobacco shred expansion treatment is carried out through tobacco shred flash evaporation equipment. There are three main forms of cut stem production line currently in use: firstly, stem thread manufactured by HAUNI company in Germany, and expansion equipment thereof consists of HT and a vibration groove type cut tobacco dryer; secondly, the stem making silk thread of British LEGG company, and the expansion equipment of the stem making silk thread consists of a super moisture regaining machine and a ring type stem making machine; and the expansion equipment of the stalk making thread of Italy COMAS company consists of a stalk moistening machine and an expansion tower. The stem processing equipment has relatively low expansion degree, high crushing rate and low utilization rate of the tobacco stems, so that the large-area application is limited to a certain extent. The tobacco stems have the defects of poor combustibility, high tar content, heavy wood gas, heavy miscellaneous gas (unpleasant and unpleasant part in the smoke, the miscellaneous gas which can be distinguished by people comprises green gas, miscellaneous gas, wood gas, scorched gas, soil fishy gas, local miscellaneous gas and the like), and the like, and the large-scale application of the tobacco stems is restricted.
The microwave technology can effectively improve the defects, and the microwave tobacco stem expansion technology develops rapidly in recent years. The research shows that: the microwave expansion tobacco stems have the effects of effectively reducing green miscellaneous gas in the original cut stems, improving the smoking taste of the cut stems and increasing the expansion rate of the cut stems. However, microwave expansion of tobacco stems has the defects of easy carbonization, uneven expansion and the like.
The invention patent 201610694811.5 provides a comprehensive utilization process for microwave expansion of tobacco stems, which adopts a three-level preheating and humidifying process to solve the problem of easy carbonization of the tobacco stems in expansion, and comprises the following steps: (1) performing three-level preheating-microwave expansion treatment on tobacco stems; (2) air cooling: blowing the tobacco stems expanded by the microwave forwards by a fan, and performing air-cooling dust removal on the tobacco stems through a dust removal cloth bag; (3) the expanded tobacco stems are subjected to stem piece forming processing; (4) and (3) carrying out forming processing on the cut stems of the expanded tobacco stems. However, the process has the disadvantages of complex equipment, long process time and the like in application.
The present invention has been made in view of this situation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a vacuum tube type tobacco stem microwave expansion device. The invention provides an efficient and simple tobacco stem microwave expansion shredding process method by adopting a vacuum technology and a special tubular microwave expansion technology, the expansion rate of the prepared expanded stems is uniform, the cut stems basically have no carbonization, and the shredding rate of the cut stems is low.
In order to solve the technical problems, the invention adopts the technical scheme that:
the invention provides a vacuum tube type tobacco stem microwave expansion device, which comprises a microwave expansion device for performing microwave expansion on tobacco stems, a sealing feeding device and a sealing discharging device, wherein the sealing feeding device is communicated with an inlet of the microwave expansion device in a sealing way, and the sealing discharging device is communicated with an outlet of the microwave expansion device in a sealing way; the device also comprises a vacuumizing device for vacuumizing the microwave expansion device and/or the sealed feeding device and/or the sealed discharging device.
In a further scheme, the microwave expansion device comprises a shell and a rotatable tubular charging barrel arranged in the shell, wherein a vacuumizing interface is arranged on the shell, and the vacuumizing device is connected with the vacuumizing interface in a sealing manner and is used for vacuumizing;
preferably, after the vacuum pumping device pumps vacuum, the vacuum degree in the microwave expansion device is more than or equal to 75 kPa.
In a further scheme, the sealed feeding device comprises a feeding buffering device and a feeding conveying device, wherein the feeding buffering device is hermetically communicated with an inlet of the feeding conveying device, and an outlet of the feeding conveying device is hermetically communicated with an inlet of the microwave expansion device;
preferably, a heat preservation device is arranged outside the feeding and conveying device, and a steam passage is arranged inside the feeding and conveying device.
In a further scheme, the feeding buffer device comprises a first feeding buffer bin and a second feeding buffer bin, an inlet of the second feeding buffer bin is hermetically connected with an outlet of the first feeding buffer bin, and an outlet of the second feeding buffer bin is hermetically communicated with an inlet of the feeding conveying device;
preferably, a material poking roller device is arranged in the first feeding buffer bin and used for poking tobacco stems to enter the second feeding buffer bin.
In a further scheme, a first feeding gate valve is arranged at the inlet end of the first feeding buffer bin, and a second feeding gate valve is arranged between the first feeding buffer bin and the second feeding buffer bin;
preferably, the first feeding gate valve and the second feeding gate valve are staggered to be opened and closed so as to maintain vacuum.
In a further scheme, the sealed discharging device comprises a discharging buffer device and a discharging conveying device, wherein an inlet of the discharging conveying device is hermetically communicated with an outlet of the microwave expansion device; the outlet of the discharging conveying device is communicated with the discharging buffer device in a sealing way;
preferably, the cross-sectional area of the discharging buffer device and the discharging conveying device is two times or more than two times that of the feeding buffer device and the feeding conveying device.
In a further scheme, the discharging buffer device comprises a first discharging buffer bin and a second discharging buffer bin, an inlet of the first discharging buffer bin is communicated with an outlet of the discharging conveying device in a sealing manner, and an outlet of the first discharging buffer bin is communicated with an inlet of the second discharging buffer bin in a sealing manner;
preferably, the outlet end of the first discharging buffer bin and/or the outlet end of the second discharging buffer bin are/is provided with a discharging gate valve;
preferably, a first discharging gate valve is arranged between the first discharging buffer bin and the second discharging buffer bin, a second discharging gate valve is arranged at the outlet end of the second discharging buffer bin, and the first discharging gate valve and the second discharging gate valve are staggered to be opened and closed so as to keep vacuum.
The microwave expansion device is arranged on the rack, an adjusting mechanism is arranged on the rack, the microwave expansion device is obliquely arranged by adjusting the angle of the adjusting mechanism, and the height of the inlet end is higher than that of the outlet end;
preferably, the angle formed between the microwave expansion device and the horizontal plane is 3 degrees +/-2 degrees.
In a further scheme, an outlet of the feeding conveying device is hermetically connected with an inlet of the microwave expansion device through a deformation structure, and an inlet of the discharging conveying device is hermetically connected with an inlet of the microwave expansion device through the deformation structure;
preferably, the deformation structure is a corrugated pipe.
In a further scheme, a tubular charging barrel is arranged along the axial direction of a shell, one end of the charging barrel is connected with the shell by adopting a cantilever beam structure, and the other end of the charging barrel is connected with a driving device and driven by the driving device to rotate;
preferably, the barrel is a non-metal barrel.
In a further scheme, the cantilever beam structure comprises a fixed part and a mounting seat, the fixed part is fixedly mounted with the rack, the mounting seat is fixedly arranged on the fixed part, and a rotating shaft at one end of the charging barrel penetrates through the shell to be connected with the mounting seat;
preferably, the fixing part comprises a first supporting rib and a second supporting rib, the first supporting rib is arranged in parallel with the axial direction of the shell, one end of the first supporting rib is fixed with the rack, and the other end of the first supporting rib extends to the outer side of the end part of the shell; the second support rib is perpendicular to the first support rib, the lower end of the second support rib is fixedly connected with one extending end of the first support rib, and the upper part of the second support rib is fixedly provided with the mounting seat;
more preferably, the fixing part further comprises a third supporting rib, the upper end of the third supporting rib is fixedly connected with the second supporting rib, the lower end of the third supporting rib is fixedly connected with the first supporting rib, and the first supporting rib, the second supporting rib and the third supporting rib form a triangle.
Before the microwave expansion device works, the sealing feeding device, the sealing discharging device and the microwave expansion device are controlled to keep sealing, and the vacuumizing device is controlled to vacuumize;
preferably, the first feeding gate valve is controlled to be opened/closed, the second feeding gate valve is controlled to be closed/opened at the same time, feeding is carried out, and the sealed feeding device, the sealed discharging device and the microwave expansion device are maintained at a certain vacuum degree.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts the vacuum technology and the special tubular microwave expansion technology, greatly improves the defects of easy carbonization and uneven expansion of the expanded tobacco stems, has uniform expansion rate of the tobacco stems, basically no carbonization of the cut stems, low breakage rate of the cut stems and improves the utilization rate of the tobacco stems.
2. The sealed feeding device and the sealed discharging device are hermetically connected with the microwave expansion device, and basic conditions are provided for keeping a certain vacuum degree in the system. The sealed feeding device and the sealed discharging device are respectively provided with two buffering bins, the inlet ends and/or the outlet ends of the buffering bins are/is provided with gate valves, and a space between the two gate valves is adopted
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic structural diagram of the vacuum tube type tobacco stem microwave expansion device.
In the figure: 100 microwave expansion device, 101 shell, 102 charging barrel, 103 vacuumizing interface, 104 microwave generator, 105 cantilever beam structure, 106 mounting seat, 107 first supporting rib, 108 second supporting rib, 109 third supporting rib, 110 driving device, 200 sealing feeding device, 211 first feeding buffer bin, 212 second feeding buffer bin, 213 first feeding gate valve, 214 second feeding gate valve, 220 feeding conveying device, 300 sealing discharging device, 311 first discharging buffer bin, 312 second discharging buffer bin, 313 first discharging gate valve, 314 second discharging gate valve, 320 discharging conveying device, 400 vacuumizing device, 500 frame, 501 adjusting mechanism, 600 inlet bellows and 601 outlet bellows.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
As shown in fig. 1, the embodiment provides a vacuum tube type microwave tobacco stem expansion device, which comprises a microwave expansion device 100 for performing microwave expansion on tobacco stems, a sealing feeding device 200 and a sealing discharging device 300, wherein the sealing feeding device 200 is in sealing communication with an inlet of the microwave expansion device 100, and the sealing discharging device 300 is in sealing communication with an outlet of the microwave expansion device 100; the device further comprises a vacuum pumping device 400 for pumping vacuum to the microwave expansion device 100 and/or the sealed feeding device 200 and/or the sealed discharging device 300.
In this embodiment, the microwave expansion device 100, the sealing feeding device 200 and the sealing discharging device 300 constitute a system for microwave expansion of tobacco stems. In the scheme, the vacuumizing device 400 is additionally arranged on the tobacco stem microwave expansion device 100, and the sealing feeding device 200 and the sealing discharging device 300 are hermetically connected with the microwave expansion device 100, so that a certain vacuum degree can be maintained in the whole tobacco stem microwave expansion system, the defects of easiness in carbonization and non-uniform expansion of expanded tobacco stems can be greatly improved, the tobacco stems with high expansion rate, low carbonization rate and uniform expansion can be obtained, and the requirement of slicing or shredding the tobacco stems is met. Meanwhile, the device has the capacity of large-scale and continuous production.
In a further scheme, the microwave expansion device 100 includes a housing 101 and a rotatable tubular charging barrel 102 disposed inside the housing 101, a vacuum port 103 is disposed on the housing 101, and the vacuum device 400 is hermetically connected to the vacuum port 103 for vacuum pumping.
The housing 101 of the microwave expansion device 100 is cylindrical, and the cartridge 102 is a built-in non-metal cartridge 102. The vacuum pumping device 400 is connected with the microwave expansion device 100 through the vacuum pumping interface 103 to pump vacuum to the whole system, thereby reducing the carbonization rate and improving the uniformity of expansion.
Preferably, the degree of vacuum in the microwave expansion device 100 after the evacuation device 400 evacuates is greater than or equal to 75 kPa.
The vacuum pumping device 400 can be a vacuum pump, and the vacuum pump is adopted to pump the whole system to ensure that the vacuum degree is more than or equal to 75 kPa. The vacuum pump is preferably a water ring vacuum pump, has strong dust and oil stain resistance, and can efficiently adapt to the characteristic of high dust concentration in the vacuum microwave expansion equipment.
In a further aspect, the sealed feeding device 200 includes a feeding buffer device and a feeding conveying device 220, the feeding buffer device is in sealed communication with an inlet of the feeding conveying device 220, and an outlet of the feeding conveying device 220 is in sealed communication with an inlet of the microwave expansion device 100.
The feeding buffer device of the scheme is a tobacco stem feeding device, and the feeding conveying device 220 can be a feeding sealing spiral conveyor; under the action of the feeding sealing screw conveyor, tobacco stems can be smoothly input into the microwave expansion device 100, and the feeding buffer device can ensure the vacuum degree of the whole system during feeding.
Preferably, a heat preservation device is arranged outside the feeding and conveying device 220, and a steam passage is arranged inside the feeding and conveying device; thereby ensuring the warming and humidifying of the tobacco stems.
In a further aspect, the feeding buffer device includes a first feeding buffer bin 211 and a second feeding buffer bin 212, an inlet of the second feeding buffer bin 212 is hermetically connected with an outlet of the first feeding buffer bin 211, and an outlet of the second feeding buffer bin 212 is hermetically communicated with an inlet of the feeding conveying device 220.
The device of this scheme sets up two feeding surge bins, gets into two feeding surge bins during offal feeding in proper order, and the device of this scheme can be through opening and closing of controlling two feeding surge bins to can still guarantee the vacuum in the system when the feeding.
Preferably, a material poking roller device is arranged inside the first feeding buffer bin 211 and pokes the tobacco stems to enter the second feeding buffer bin 212, so that the feeding continuity can be guaranteed.
In a further scheme, a first feeding gate valve 213 is arranged at the inlet end of the first feeding buffer bin 211, and a second feeding gate valve 214 is arranged between the first feeding buffer bin 211 and the second feeding buffer bin 212;
preferably, the first feed gate valve 213 and the second feed gate valve 214 are staggered to open and close to maintain the vacuum.
The first feeding gate valve 213 and the second feeding gate valve 214 arranged in the scheme can control the opening and closing of the two buffering bins respectively, so that the first feeding gate valve 213 is opened firstly and the second feeding gate valve 214 is closed during feeding; at this moment, the tobacco stems enter the first feeding buffer bin 211, then the first feeding gate valve 213 is controlled to be closed, the second feeding gate valve 214 is controlled to be opened, at this moment, the sealing performance after the feeding device 200 and the microwave expansion device 100 are communicated can be ensured during feeding, and a certain vacuum degree is ensured to be maintained in the system.
In a further scheme, the sealed discharging device 300 comprises a discharging buffer device and a discharging conveying device 320, wherein an inlet of the discharging conveying device 320 is in sealed communication with an outlet of the microwave expansion device 100; the outlet of the discharging conveying device 320 is communicated with the discharging buffer device in a sealing way.
In this scheme, ejection of compact buffer includes two surge bins of at least export, and ejection of compact conveyor 320 can be for taking sealing function's export screw conveyer. The expanded tobacco stems are full and easy to flow, and no material stirring roller is arranged in the outlet buffer bin. The inlet end and the outlet end of the discharging conveying device 320 are respectively connected with the microwave expansion device 100 and the discharging buffer device in a sealing manner, so that the tobacco stems expanded in the microwave expansion device 100 can be discharged.
Preferably, the cross-sectional area of the discharging buffer device and the discharging conveyor 320 is two times or more than two times of the cross-sectional area of the feeding buffer device and the feeding conveyor 220.
Considering that the volume of the expanded tobacco stems is larger, the expansion rate is generally more than 200%, and the cross-sectional area of the spiral conveyor and the buffer bin for discharging is 2 times or more than that of the feeding buffer device and the feeding conveying device 220.
In a further scheme, the discharging buffer device comprises a first discharging buffer bin 311 and a second discharging buffer bin 312, an inlet of the first discharging buffer bin 311 is in sealed communication with an outlet of the discharging conveying device 320, and an outlet of the first discharging buffer bin 311 is in sealed communication with an inlet of the second discharging buffer bin 312.
The device of this scheme sets up two ejection of compact surge bins, gets into two ejection of compact surge bins during offal feeding in proper order, and the device of this scheme can be through opening and closing of controlling two ejection of compact surge bins to can still guarantee the vacuum in the system when the ejection of compact, realize the serialization production of device.
Preferably, an outlet end of the first discharging buffer bin 311 and/or an outlet end of the second discharging buffer bin 312 are/is provided with a discharging gate valve.
In this scheme, can set up ejection of compact slide valve one, open during the ejection of compact, directly discharge the offal after will expanding through sealed discharging device 300. When the tobacco stems are fed, the discharging gate valve is closed, the vacuumizing device 400 can vacuumize, the vacuum degree during microwave expansion is guaranteed, the carbonization rate is reduced, and the expansion uniformity is improved.
In this scheme, also can set up multichannel ejection of compact slide valve, open and close through the mistake between different ejection of compact slide valves, keep the vacuum in the system.
As a preferred embodiment, a first discharging gate valve 313 is arranged between the first discharging buffer bin 311 and the second discharging buffer bin 312, a second discharging gate valve 314 is arranged at the outlet end of the second discharging buffer bin 312, and the first discharging gate valve 313 and the second discharging gate valve 314 are opened and closed in a staggered manner to maintain vacuum.
The first discharging gate valve 313 and the second discharging gate valve 314 arranged in the scheme can control the opening and closing of the two discharging buffer bins respectively, so that the first discharging gate valve 313 is opened firstly and the second discharging gate valve 314 is closed during discharging; at this moment, the tobacco stems enter the second discharging buffer bin 312 from the first discharging buffer bin 311, then the first discharging gate valve 313 is controlled to be closed, the second discharging gate valve 314 is opened, and at this moment, the sealing performance after the sealing discharging device 300 and the microwave expansion device 100 are communicated can be ensured during discharging, so that a certain vacuum degree is ensured to be maintained in the system.
In a further scheme, the microwave expansion device comprises a rack 500, the microwave expansion device 100 is mounted on the rack 500, an adjusting mechanism 501 is arranged on the rack 500, the microwave expansion device 100 is obliquely arranged by adjusting the angle of the adjusting mechanism 501, and the height of an inlet end is higher than that of an outlet end;
preferably, the angle formed between the microwave expansion device 100 and the horizontal plane is 3 ° ± 2 °.
The rack 500 of the present embodiment is a support for mounting the microwave expansion device 100, the adjusting mechanism 501 may be a screw mechanism, and the angle of the microwave expansion device 100 may be adjusted by the screw mechanism on the rack 500, so that the inlet end of the microwave expansion device 100 is slightly higher, which is beneficial for the expanded tobacco stems to flow to the outlet end.
In a further scheme, an outlet of the feeding conveying device 220 is hermetically connected with an inlet of the microwave expansion device 100 through a deformation structure, and an inlet of the discharging conveying device 320 is hermetically connected with an inlet of the microwave expansion device 100 through a deformation structure;
preferably, the deformation structure is a corrugated pipe, so that the vibration of the microwave expansion device 100 during operation can be buffered, and the buffering function of maintaining the sealing feeding device 200 and the sealing discharging device 300 to be hermetically connected with the microwave expansion device 100 can also be achieved.
The deformation structure at the connection between the outlet of the feeding conveyer 220 and the inlet of the microwave expansion device 100 may be an inlet corrugated pipe 600, and the deformation structure at the connection between the inlet of the discharging conveyer 320 and the outlet of the microwave expansion device 100 may be an outlet corrugated pipe 601. The outlet bellows 601 can compensate for the tilt angle adjustment of the microwave expansion device 100, and the inlet bellows 600 needs to balance larger axial and radial displacements, so that two or three bellows can be provided.
In a further scheme, a tubular charging barrel 102 is arranged along the axial direction of the housing 101, one end of the charging barrel 102 is connected with the housing 101 by using a cantilever beam structure 105, and the other end of the charging barrel is connected with a driving device 110 and is driven by the driving device 110 to rotate;
preferably, the cartridge 102 is a non-metal cartridge 102.
The nonmetal feed cylinder 102 of built-in tubular of this scheme, both ends adopt the metal axle to install in the terminal surface center, and one end installation axle inserts formula speed reducer, and the speed reducer adopts inverter motor drive, the convenient rotational speed of adjusting to needs. The other end of the charging barrel is connected by adopting a cantilever beam structure 105, and a structure that the charging barrel 102 is supported by adopting a metal bearing is eliminated, so that the possibility of metal sparking in a microwave field is avoided. The tobacco stems are fed by end faces, so that the tobacco stems can be effectively prevented from falling into the charging barrel 102, and smoldering caused by gathering of the tobacco stems is avoided. The charging barrel 102 is internally provided with a frying plate which plays a role of uniformly dispersing materials.
In a further scheme, the cantilever beam structure 105 includes a fixing portion and a mounting seat 106, the fixing portion is fixedly mounted with the frame 500, the mounting seat 106 is fixedly disposed on the fixing portion, and a rotating shaft at one end of the cartridge 102 penetrates through the housing 101 to be connected with the mounting seat 106;
preferably, the fixing portion includes a first support rib 107 and a second support rib 108, the first support rib 107 is arranged in parallel with the axial direction of the housing, one end of the first support rib 107 is fixed to the frame 500, and the other end of the first support rib extends to the outer side of the end portion of the housing; the second support rib 108 is perpendicular to the first support rib 107, the lower end of the second support rib is fixedly connected with the extending end of the first support rib 107, and the upper part of the second support rib 108 is fixedly provided with the mounting seat 106;
more preferably, the fixing portion further includes a third supporting rib 109, the upper end of the third supporting rib 109 is fixedly connected to the second supporting rib 108, the lower end of the third supporting rib 109 is fixedly connected to the first supporting rib 107, and the first supporting rib 107, the second supporting rib 108 and the third supporting rib 109 enclose a triangle.
In a further scheme, the end surfaces of the front end and the rear end of the shell 101 are respectively provided with an observation window, and the side wall of the shell 101 is provided with a plurality of microwave generators 104;
preferably, the end face of the housing 101 is an irregular hexagon, a plurality of microwave peep holes are formed in each of five side walls of the housing 101, and the microwave generator 104 is installed in the microwave peep holes.
Five surfaces of the hexahedron except the bottom surface are provided with microwave peep holes, a 1kW or 1.5kW low-power microwave generator 104 is installed, the microwave frequency is 2450MHz, and microwave expansion is realized.
Example two
The embodiment is further limited to the first embodiment, and the embodiment provides a control method of a vacuum tube type tobacco stem microwave expansion device, before the microwave expansion device 100 works, the sealing feeding device 200, the sealing discharging device 300 and the microwave expansion device 100 are controlled to keep sealing, and the vacuumizing device 400 is controlled to vacuumize.
After feeding, controlling the sealed feeding device 200, the sealed discharging device 300 and the microwave expansion device 100 to keep sealed, vacuumizing the vacuumizing device 400 to keep the vacuum degree of more than or equal to 75kPa in a system consisting of the sealed feeding device 200, the sealed discharging device 300 and the microwave expansion device 100, and starting the microwave expansion device 100 to perform vacuum expansion on tobacco stems; after the expansion is completed, the sealed discharging device 300 is opened by adopting a direct opening mode or a staggered opening mode, and the expanded tobacco stems flow out.
Preferably, the first feeding gate valve 213 is controlled to open/close, and the second feeding gate valve 214 is controlled to close/open, so as to feed, and maintain the sealed feeding device 200, the sealed discharging device 300 and the microwave expansion device 100 at a certain vacuum degree.
During feeding, the first feeding gate valve 213 is opened first, and the second feeding gate valve 214 is closed; at this moment, the tobacco stems enter the first feeding buffer bin 211, then the first feeding gate valve 213 is controlled to be closed, the second feeding gate valve 214 is controlled to be opened, at this moment, the sealing performance after the feeding device 200 and the microwave expansion device 100 are communicated can be ensured during feeding, and a certain vacuum degree is ensured to be maintained in the system.
During discharging, the first discharging gate valve 313 is firstly opened, and the second discharging gate valve 314 is closed; at this moment, the tobacco stems enter the second discharging buffer bin 312 from the first discharging buffer bin 311, then the first discharging gate valve 313 is controlled to be closed, the second discharging gate valve 314 is opened, and at this moment, the sealing performance after the sealing discharging device 300 and the microwave expansion device 100 are communicated can be ensured during discharging, so that a certain vacuum degree is ensured to be maintained in the system.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A vacuum tube type tobacco stem microwave expansion device is characterized by comprising a microwave expansion device for performing microwave expansion on tobacco stems, a sealing feeding device and a sealing discharging device, wherein the sealing feeding device is communicated with an inlet of the microwave expansion device in a sealing way, and the sealing discharging device is communicated with an outlet of the microwave expansion device in a sealing way; the device also comprises a vacuumizing device for vacuumizing the microwave expansion device and/or the sealed feeding device and/or the sealed discharging device.
2. The vacuum tube type tobacco stem microwave expansion device according to claim 1, wherein the microwave expansion device comprises a shell and a rotatable tube type charging barrel arranged in the shell, a vacuumizing interface is arranged on the shell, and the vacuumizing device is hermetically connected with the vacuumizing interface for vacuumizing;
preferably, after the vacuum pumping device pumps vacuum, the vacuum degree in the microwave expansion device is more than or equal to 75 kPa.
3. The vacuum tube type tobacco stem microwave expansion device according to claim 1 or 2, characterized in that the sealing feeding device comprises a feeding buffer device and a feeding conveying device, the feeding buffer device is in sealing communication with an inlet of the feeding conveying device, and an outlet of the feeding conveying device is in sealing communication with an inlet of the microwave expansion device;
preferably, a heat preservation device is arranged outside the feeding and conveying device, and a steam passage is arranged inside the feeding and conveying device.
4. The vacuum tube type tobacco stem microwave expansion device according to claim 3, wherein the feeding buffer device comprises a first feeding buffer bin and a second feeding buffer bin, an inlet of the second feeding buffer bin is connected with an outlet of the first feeding buffer bin in a sealing manner, and an outlet of the second feeding buffer bin is communicated with an inlet of the feeding conveying device in a sealing manner;
preferably, a material poking roller device is arranged in the first feeding buffer bin and used for poking tobacco stems to enter the second feeding buffer bin.
5. The vacuum tube type tobacco stem microwave expansion device according to claim 4, characterized in that the inlet end of the first feeding buffer bin is provided with a first feeding gate valve, and a second feeding gate valve is arranged between the first feeding buffer bin and the second feeding buffer bin;
preferably, the first feeding gate valve and the second feeding gate valve are staggered to be opened and closed so as to maintain vacuum.
6. The vacuum tube type tobacco stem microwave expansion device according to any one of claims 1 to 5, wherein the sealed discharging device comprises a discharging buffer device and a discharging conveying device, and an inlet of the discharging conveying device is in sealed communication with an outlet of the microwave expansion device; the outlet of the discharging conveying device is communicated with the discharging buffer device in a sealing way;
preferably, the cross-sectional area of the discharging buffer device and the discharging conveying device is two times or more than two times that of the feeding buffer device and the feeding conveying device.
7. The vacuum tube type tobacco stem microwave expansion device according to claim 6, wherein the discharging buffer device comprises a first discharging buffer bin and a second discharging buffer bin, an inlet of the first discharging buffer bin is in sealed communication with an outlet of the discharging conveying device, and an outlet of the first discharging buffer bin is in sealed communication with an inlet of the second discharging buffer bin;
preferably, the outlet end of the first discharging buffer bin and/or the outlet end of the second discharging buffer bin are/is provided with a discharging gate valve;
preferably, a first discharging gate valve is arranged between the first discharging buffer bin and the second discharging buffer bin, a second discharging gate valve is arranged at the outlet end of the second discharging buffer bin, and the first discharging gate valve and the second discharging gate valve are staggered to be opened and closed so as to keep vacuum.
8. The vacuum tube type tobacco stem microwave expansion device according to any one of claims 4 to 7, further comprising a frame, wherein the microwave expansion device is mounted on the frame, an adjusting mechanism is arranged on the frame, the microwave expansion device is obliquely arranged by adjusting the angle of the adjusting mechanism, and the inlet end is higher than the outlet end;
preferably, the angle formed between the microwave expansion device and the horizontal plane is 3 degrees +/-2 degrees.
9. The vacuum tube type tobacco stem microwave expansion device according to any one of claims 5 to 8, wherein the outlet of the feeding conveying device is hermetically connected with the inlet of the microwave expansion device through a deformation structure, and the inlet of the discharging conveying device is hermetically connected with the inlet of the microwave expansion device through a deformation structure;
preferably, the deformation structure is a corrugated pipe.
10. A control method of a vacuum tube type tobacco stem microwave expansion device according to any one of claims 1 to 9, characterized in that before the microwave expansion device works, the sealing feeding device, the sealing discharging device and the microwave expansion device are controlled to keep sealing, and the vacuumizing device is controlled to vacuumize;
preferably, the first feeding gate valve is controlled to be opened/closed, the second feeding gate valve is controlled to be closed/opened at the same time, feeding is carried out, and the sealed feeding device, the sealed discharging device and the microwave expansion device are maintained at a certain vacuum degree.
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