CN202077560U - Roller-type tobacco stem continuous microwave expanding device - Google Patents

Abstract

A drum-type continuous microwave expansion device for tobacco stems, comprising a microwave source cavity (2) installed on a frame (1), a material delivery roller (6) that passes through the middle of the microwave source cavity and can rotate along the axis ), the drum drive mechanism (23), the air-cooling system (26) arranged on the protective cover, and the fixed microwave suppression components (5, 5′) are set outside the material conveying drum and located at both ends of the microwave source cavity. The feed end and discharge end of the conveying drum are respectively connected to a fixed feed end cylinder (3) and a discharge end cylinder (10) through a rotary member (4), and the feed end cylinder is connected to the feed device (7). A discharge device (12) is connected to the lower part of the discharge end cylinder, and a dust collector (9) is also connected to the upper part of the discharge end cylinder; a protective cover (24) is placed on the microwave source cavity and the microwave suppression component. The utility model can prepare tobacco stems with high puffing degree and low crushing rate, and further prepare shredded stems with good quality. It can meet the requirements of specialized, large-scale and continuous production.

Description

A drum-type tobacco stem continuous microwave expansion device

technical field

The utility model belongs to the technical field of microwave continuous expansion processing equipment for expanding tobacco stems.

Background technique

With the rapid development of the modern tobacco industry, the safety and economy of tobacco products have attracted more and more attention. The expanded shredded stems obtained after the tobacco stems are individually processed have increasingly prominent application value due to their outstanding advantages, mainly as follows: the expanded shredded stems can effectively reduce the tar content of cigarette products and improve the safety of cigarette products; After the treatment, the bitterness, spicy taste, irritation and miscellaneous gas of the tobacco stems are significantly reduced, and the quality of cigarette products is improved; the expanded shredded stems have a higher filling value, and adding them to the cigarette formula can greatly reduce costs and increase Corporate profits. Therefore, in the production process of shredded cigarettes, about 20% to 30% of tobacco stems need to be made into shredded tobacco stems and mixed into shredded tobacco. Expanded tobacco stems have been widely used in the production of modern cigarettes. Its application prospects Vast, urgently need industrial production equipment to provide support.

At present, my country's tobacco companies mainly use high-temperature and high-humidity processing technology to make cut stems, that is, to wet the tobacco stems under heating, then cut the tobacco stems into shreds, and then expand the shredded tobacco through the shredded tobacco flashing equipment. The existing cut stem production line mainly has three forms: one is the stem silk thread produced by Germany HAUI Company, and its expansion equipment is composed of HT and vibrating trough drying machine; the other is the stem silk thread produced by British LEGG Company, and its expansion equipment is composed of super It is composed of a backtracking machine and a ring-type tobacco stem cutting machine; the third is the stem-making silk thread of the Italian COMAS company, and its expansion equipment is composed of a stem humidifier and an expansion tower. These tobacco stem processing equipment have a relatively low expansion degree, a high crushing rate, and a low utilization rate of the tobacco stem.

Chinese published patent CN1387802A and Chinese published patent CN1387802 all disclose a kind of cut stem production process with microwave puffed tobacco stem technology as the core, "expanding first, then cutting, and restoring shape"; Chinese published patent CN1554293 discloses a tobacco shredded New process, wherein the puffing treatment of tobacco stems adopts microwave puffing; Chinese patent CN1518906A discloses a pretreatment method of tobacco stems mixed with microwave low-loss solid medium particle heat medium and treated with microwaves; Chinese patent CN101214086A discloses a The invention relates to a pretreatment method for tobacco stems which is pretreated by gas heat medium and treated with microwaves in a gas heat medium environment. However, what these patents disclose are all techniques or methods for microwave treatment of tobacco stems, and few mention the equipment technology for microwave puffing treatment of tobacco stems. Chinese published patent CN2607033Y discloses a multi-wave source and multi-feeder microwave expansion tobacco stem device, including a microwave magnetron, a driving power supply connected to the microwave magnetron, a heating box, a material inlet and outlet, and a suppression section on the inlet and outlet. A plurality of microwave magnetrons connected to the excitation cavity are arranged at the bottom of the heating box, and a preheating section is arranged at the rear end of the suppression section of the tobacco stem inlet; at the same time, a front end of the suppression section of the tobacco stem outlet is arranged. There is an insulation section. The device is essentially a conventional tunnel dryer used to expand tobacco stems, with low and uneven power density and poor expansion effect. Chinese published patent CN101214086A discloses a pretreatment method of tobacco stems pretreated by gas heat medium and treated with microwaves in a gas heat medium environment and equipment using the method. The equipment includes a gas heat medium preheating mechanism, microwave composite expansion processing agencies, etc. This patent mainly describes the method for pretreatment of tobacco stems, and only gives a conceptual description of the equipment, which is still a long way from industrial production application.

The application of microwave puffed tobacco stems is severely restricted due to the lack of equipment and technology related to the microwave puffing of tobacco stems.

Contents of the invention

The purpose of this utility model is to solve the deficiencies of the existing technology, to provide a drum-type continuous microwave expansion device for tobacco stems that can meet the requirements of specialization, large-scale and continuous production, and use the microwave expansion method to process tobacco stems to prepare puffed Tobacco stems with higher degree and low crushing rate can be prepared to obtain cut stems with good quality.

The purpose of this utility model is achieved through the following technical solutions.

A drum-type continuous microwave expansion device for tobacco stems, comprising a microwave source cavity installed on a frame, a material conveying drum that passes through the middle of the microwave source cavity and can rotate along the axis, a drum driving mechanism, and a protective The air-cooling system on the cover is equipped with fixed microwave suppression components at both ends of the microwave source cavity outside the material delivery drum, and fixed feed ends are connected to the feed end and discharge end of the material delivery drum through rotary components. The barrel and the discharge end barrel, the feed end barrel is connected with the feeding device, the lower part of the discharge end barrel is connected with a discharge device, and the upper part of the discharge end barrel is also connected with a dust collector; the microwave source cavity and the microwave suppression component cover With protective cover.

The microwave source cavity described in the utility model is a positive odd polyhedral cylinder with an operation door on one side wall and at least two microwave feeding ports on the other side wall. The positive and odd polyhedral cylinders described in the utility model are pentagonal cylinders, which form a multi-tube low-power non-coherent power synthesis polyhedron focusing type microwave resonator cavity.

The frame of the utility model is a triangular frame, the bottom corner of the triangular frame is installed on the base through hinge shafts or bolts, and a flat plate is installed on the surface opposite to the bottom corner, microwave source cavity, drum driving mechanism, and feeding device They are all installed on the flat plate; a push rod that can move up and down is connected to the bottom of one end of the flat plate.

The material conveying roller of the utility model is installed in cooperation with the microwave source cavity through a sleeve sleeved on its outer surface; the microwave suppression component is set on the sleeve; The annular reactive energy leakage suppressor on the sleeve, the annular resistive energy leakage suppressor composed of a wave-absorbing filler ring and the wave-absorbing sealing ring, and the ring-shaped reactive energy leakage suppressor and the annular resistive energy leakage suppressor The pressure sleeve outside the energy suppressor, the inner end side plate of the pressure sleeve is fixedly connected with the outer end side plate of the microwave source cavity through a connecting member; the annular reactive energy leakage suppressor and the annular resistive energy leakage suppressor and their pressure sleeves An anti-microwave leakage structure is formed; the anti-microwave leakage structure is connected with the microwave source cavity as a whole and fixed, and the material conveying roller rotates along the axis line to form a rotary dynamic sealing structure.

The material conveying roller of the utility model is arranged obliquely, and the inclination angle of its axis line relative to the horizontal plane is not more than 15 degrees, and a copying board is installed on the inner wall of the material conveying roller.

The feeding device described in the utility model is a variable-pitch anti-blocking screw feeding and conveying device, which is directly connected with the feeding end cylinder, and the two ends of the shaft of the screw feeding and conveying device are sealed by a graphite shaft sealing device.

In the utility model, a synchronous mechanism is connected between two rotary components arranged at both ends of the material conveying roller, and the synchronous mechanism is connected with the driving mechanism.

The protective cover of the utility model is an integral structure covering the microwave source cavity and the microwave suppression component, or is composed of an upper protective cover and a lower protective cover.

The discharge device described in the utility model is an all-metal micro-gap star-shaped rotary discharge device that can prevent microwave leakage.

The filler in the wave-absorbing filler ring of the utility model is silicon rubber sealing gasket or metal shielding net, and the sealing material of the wave-absorbing sealing ring is graphite or silicon rubber or pyramid foam.

The utility model can fully adopt automatic control and is easy to operate. The microwave power density is high, the heating speed is fast, time and labor are saved, and energy consumption can be effectively reduced. The expansion rate and expansion uniformity of the produced tobacco stems are high, and high-quality shredded stems can be prepared. The continuous delivery of tobacco stems can be realized by using the material conveying drum, without intermittent emptying and feeding, the path of the tobacco stems before turning over in the drum is consistent, the absorption of microwave energy is consistent, the degree of material expansion is consistent, and the obtained expanded tobacco The stem expansion rate is high, the expansion uniformity is good, and the processing efficiency is high, which can meet the requirements of specialization, large-scale and continuous production.

The microwave source cavity adopts a positive-odd multi-faceted cylindrical structure that is installed on one side wall and microwave feeding ports are uniformly opened on the other side wall, which can significantly improve the uniformity of microwave distribution and effectively reduce microwave dead angles.

The frame structure of the triangular frame is adopted, and the flat plate of the frame is connected with the push rod, so that the height of the equipment and the inclination angle of the material conveying roller can be adjusted conveniently to meet the requirements of actual production.

The rotary dynamic sealing structure adopts a combination structure of a reactive energy leakage suppressor and a resistive energy leakage suppressor. The reactive energy leakage suppressor can reflect most of the microwave energy back to the furnace cavity and perform a certain degree of microwave energy. The attenuation of the wave absorbing material ring and the wave absorbing sealing ring are combined into a resistive energy leakage suppressor and installed at the rear end of the reactive energy leakage suppressor, which can absorb the remaining microwave energy again. , to further play a better protective role, effectively control the microwave leakage, and prevent the microwave leakage of the rotary microwave drying equipment. The leakage is less than 0.5mW/cm ² required by the national standard, which can achieve the ideal protective effect.

Microwave synthesis adopts multi-tube low-power incoherent power synthesis polyhedral focusing technology, which can increase the microwave power density in the material area.

The feeding device adopts the variable pitch anti-blocking screw feeding conveying device, which is directly connected with the drum body, and can smoothly realize the continuous conveying of materials.

The material conveying drum adopts a downward-sloping placement method with a high feeding end and a low discharging end. A copying board is set inside the drum, which can make the processed tobacco stems roll down naturally due to gravity during the transportation process, and strengthen the tobacco stems. puffing effect.

Further set forth the content of the present utility model below in conjunction with accompanying drawing of description.

Description of drawings

Fig. 1 is a schematic structural view of the utility model protective cover in the state of taking it off;

Fig. 2 is the front view of the protective cover of the utility model in the state of taking it off;

Fig. 3 is the left view of Fig. 2;

Fig. 4 is a structural schematic diagram of the utility model in the microwave suppression structure section;

Fig. 5 is the front view of microwave source cavity;

Fig. 6 is the left side view of Fig. 5;

Fig. 7 is a view from the direction A of Fig. 5 .

In the figure, 1-frame; 1a-plate; 2-microwave source cavity; 3-feed end cylinder; 4-revolving member; Material device; 8-microwave feeder; 9-dust collector; 10-discharging end cylinder; 11-operating door; 12-discharging device; 13-bolt; 14-base; 15-push rod; 16-sleeve; 17-reactive leakage energy suppressor; 18-absorbing filler ring; 19-absorbing sealing ring; 20-pressure sleeve; 21-connecting member; 22-synchronous mechanism; 23-roller driving mechanism; ; 25-lower protective cover; 26-air cooling system; 27-silo.

Detailed ways

As shown in Figure 1, Figure 2 and Figure 3, the utility model includes a microwave source cavity 2 installed on the frame 1, a protective cover covering the microwave source cavity, passing through the middle of the microwave source cavity and can The material conveying drum 6 rotating along the axis, the drum driving mechanism 23, and the air-cooling system 26 arranged on the protective cover are equipped with fixed microwave suppression components 5, 5' at both ends of the microwave source cavity outside the material conveying drum 6 , the feed end and discharge end of the material conveying drum are respectively connected with a fixed feed end cylinder 3 and a discharge end cylinder 10 through a rotary member 4, the feed end cylinder is connected with the feeding device 7, and the lower part of the discharge end cylinder A discharge device 12 is connected, and a dust remover 9 is connected to the upper part of the discharge end cylinder, and a protective cover is placed on the microwave source cavity 2 and the microwave suppression components 5, 5'. The rotary member 4 is directly connected with the material conveying drum 6, which can realize the expansion of the tobacco stem in the rotary expansion treatment under the microwave environment. The material conveying drum 6 is made of wave-permeable macromolecule and its composite material or inorganic material, and a copy board is installed on the inner wall. Protective cover can adopt integral protective cover, but preferably adopts the structure that is combined by upper protective cover 24 and lower protective cover 25 as shown in the figure, has not only played protective effect, is convenient to disassembly and maintenance again.

The microwave source cavity 2 is shown in Fig. 5, Fig. 6 and Fig. 7 as a positive odd polyhedral cylinder with multiple microwave feed ports 8 on the side wall of the cavity and an operation door 11 on one side wall. The microwave source cavity 2 in this embodiment is a pentagonal cylinder. An operation door 11 is equipped with on one side wall, and microwave feeding port 8 is offered on other four side walls. The number of microwave feeding ports distributed on each side wall is set according to the power level, and generally 12 to 16 microwave feeding ports are set. The microwave source adopts multi-tube low-power (2450MHz) non-coherent power synthesis polyhedron focusing microwave resonator technology. Microwave power density in the material area inside the applicator cavity. The microwave feeding port 8 is a rectangular port, including but not limited to the form in the national standard BJ22-26. The microwave source cavity 2 is welded by metal material plates, and can also be formed by other methods. The metal materials can be selected from 304# stainless steel, 316# stainless steel, copper plates, aluminum plates, or metal materials commonly used in other industries. In order to improve the rigidity and anti-corrosion performance of the microwave source cavity. The four-sided microwave arrangement of the pentagonal cylinder of the microwave source cavity 2 is significantly improved compared to the three-sided microwave arrangement of the tetrahedron, which can effectively reduce microwave dead angles.

The frame 1 is a triangular frame with one corner downward as the bottom corner. The bottom corner of the triangular frame is installed on the base 14 through hinge shafts or bolts 13, and a flat plate 1a is installed on the surface opposite to the bottom corner. The microwave source cavity 2. The drum driving mechanism 23 and the feeding device 7 are all installed on the flat plate; a push rod 15 that can move up and down is connected to the bottom of one end of the flat plate. The push rod can be an electric push rod or a hydraulic push rod to drive the hydraulic push rod. The hydraulic mechanism of the rod can be mounted on the base 14 .

As shown in Figure 4, the material conveying roller 6 is installed in cooperation with the microwave source cavity 2 through the sleeve 16 sleeved on its outer surface; the microwave suppression components 5, 5' are sleeved on the sleeve 16; the microwave suppression components include An annular reactive energy leakage suppressor 17 that is sequentially fitted on the sleeve in the axial direction of the material conveying roller from the inside to the outside, an annular resistive energy leakage suppressor composed of a wave-absorbing filler ring 18 and a wave-absorbing sealing ring 19, and a set On the pressure sleeve 20 outside the annular reactive energy leakage suppressor and the annular resistive energy leakage suppressor, the inner end side plate of the pressure sleeve is fixedly connected with the outer end side plate of the microwave source cavity 2 through the coupling member 21 . The outer end side plates of the pressure sleeves on both sides are respectively connected with the feed end cylinder and the discharge end cylinder through connecting pieces. The annular reactive energy leakage suppressor, the annular resistive energy leakage suppressor and their pressure sleeve 20 constitute an anti-microwave leakage structure; the anti-microwave leakage structure is connected with the microwave source cavity 2 as a whole and is fixed, and the material conveying roller 6 is fixed along the axis The line rotates to form a rotary dynamic seal structure. The filler in the wave-absorbing packing material ring 18 is a silicone rubber gasket or metal shielding net, and the sealing material of the wave-absorbing sealing ring 19 is graphite or silicon rubber or pyramid foam.

The material conveying roller 6 is arranged obliquely, and the inclination angle of its axis line relative to the horizontal plane is not more than 15 degrees. Microwave synthesis adopts multi-tube low-power non-coherent power synthesis polyhedral focusing technology. The feeding device 7 adopts a variable-pitch anti-blocking screw feeding conveying device, which is directly connected with the feeding end cylinder 3 and can continuously convey materials. Both ends of the shaft of the screw feeding conveying device are sealed with a graphite shaft sealing device, which can realize continuous conveying of materials and electrical sealing.

The material conveying drum is connected with the rotary member to form a rotary drum body, and the double-end synchronous transmission is realized through the synchronous mechanism, which can realize the rotary expansion treatment of the tobacco stem expansion in the microwave environment, and effectively improve the product quality.

The feeding device 7, the feeding end cylinder 3, the material conveying drum 6, the rotary member 4, the microwave suppression structure 5, 5', the microwave source cavity 2, and the discharger 12 of the utility model are connected to each other to form a microwave airtight application The system provides guarantee for the full utilization of microwave energy, electromagnetic compatibility and labor safety. The feeding device 7, the material conveying drum 6, the rotary member 4, the microwave suppression structure 5, 5', and the discharger 12 are connected to each other to form an airtight application system, which realizes the formation of the gas heat medium environment and the recovery and utilization of the gas heat medium and energy saving.

When working, the roller driving mechanism 23 starts to drive the material conveying roller 6 to rotate. The feeding device 7 takes the tobacco stem material from the silo 27 and delivers it to the feeding end cylinder, and then enters the material delivery drum 6 . The tobacco stems are transported by the rotary motion of the material conveying drum 6. In the inclined material conveying roller, the tobacco stems are continuously turned by the action of gravity and the movement of the copying board. During the transmission process, the tobacco stems are dried and expanded under the action of the microwave field emitted by the microwave source in the microwave source cavity 2 , and then enter the discharge end cylinder 10 , and then fall into the discharge container 12 . The dust generated during the tobacco stem transportation and drying expansion process is discharged after being processed by the dust collector 9 .

Claims (10)

1. A drum-type continuous microwave expansion device for tobacco stems, characterized in that it includes a microwave source cavity (2) installed on the frame (1), which passes through the middle of the microwave source cavity and can rotate along the axis The material conveying roller (6), the roller driving mechanism (23), the air cooling system (26) arranged on the protective cover, and the fixed microwave suppression components are set outside the material conveying roller (6) and located at both ends of the microwave source cavity (5, 5'), the feed end and discharge end of the material conveying drum are respectively connected with a fixed feed end cylinder (3) and a discharge end cylinder (10) through a rotary member (4), and the feed end cylinder Connected with the feeding device (7), the lower part of the discharge end cylinder is connected with the discharge device (12), and the upper part of the discharge end cylinder is also connected with the dust collector (9); the microwave source cavity (2) and the microwave suppression component (5,5 ') outer cover has protective cover (24). 2. A drum-type continuous microwave expansion device for tobacco stems according to claim 1, characterized in that, the microwave source cavity (2) is equipped with an operation door (11) on one side wall, and an operation door (11) on the other side wall A positive odd polyhedral cylinder with at least two microwave feeding ports (8). 3. A drum-type continuous microwave expansion device for tobacco stems according to claim 2, characterized in that, the positive and odd polyhedral cylinders are pentagonal cylinders, forming a multi-tube low-power non-coherent power synthetic polyhedral focused microwave resonant cavity. 4. A drum-type continuous microwave expansion device for tobacco stems according to claim 1, characterized in that the frame (1) is a triangular frame, and the bottom corners of the triangular frame are installed on the On the base (14), a flat plate (1a) is installed on the surface opposite to the bottom corner, and the microwave source cavity (2), the drum driving mechanism (23), and the feeding device (7) are all installed on the flat plate; A push rod (15) that can move up and down is connected to the bottom of one end. 5. A drum-type continuous microwave expansion device for tobacco stems according to claim 1, characterized in that the material conveying drum (6) passes through the sleeve (16) on its outer surface and the microwave source cavity (2) Coordinated installation; the microwave suppression components (5, 5') are set on the sleeve (16); the microwave suppression components include ring-shaped reactive energy leakage suppressors that are sequentially set on the sleeve from the inside to the outside along the axial direction of the material conveying roller (17), the annular resistive energy leakage suppressor composed of the wave-absorbing filling material ring (18) and the wave-absorbing sealing ring (19), and the ring-shaped reactive energy leakage suppressor and the annular resistive energy leakage suppressor The outer pressure sleeve (20), the inner end side plate of the pressure sleeve and the outer end side plate of the microwave source cavity (2) are fixedly connected through the connecting member (21); the annular reactive leakage energy suppressor and the annular resistive energy leakage suppressor The suppressor and its pressure sleeve (20) form a microwave leakage prevention structure; the microwave leakage prevention structure is connected with the microwave source cavity (2) and remains fixed, and the material conveying roller (6) rotates along the axis to form a rotary dynamic Sealed structure. 6. A drum-type continuous microwave expansion device for tobacco stems according to claim 1, characterized in that the material conveying drum (6) is arranged obliquely, and the inclination angle of its axis line relative to the horizontal plane is not more than 15 degrees, and the The inner wall of the conveying drum (6) is provided with a copy board. 7. A drum-type tobacco stem continuous microwave expansion device according to claim 1, characterized in that the feeding device (7) is a variable-pitch anti-blocking screw feeding conveying device, directly connected to the feeding end cylinder (3) Connected with each other, the two ends of the shaft of the screw feeding conveying device are sealed with a graphite shaft sealing device. 8. A drum-type continuous microwave expansion device for tobacco stems according to claim 1, characterized in that a synchronization mechanism (22) is connected between the two rotating members (4) arranged at both ends of the material conveying drum to synchronize Mechanism is connected with drum driving mechanism (23). 9. A drum-type continuous microwave expansion device for tobacco stems according to claim 1, characterized in that the discharge device (12) is an all-metal micro-gap star-shaped rotary discharge device that can prevent microwave leakage. 10. A drum-type continuous microwave expansion device for tobacco stems according to claim 5, characterized in that the filler in the wave-absorbing filler ring (18) is a silicone rubber gasket or a metal shielding net, and the wave-absorbing seal is The sealing material of the ring (19) is graphite or silicon rubber or pyramid foam.

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