Oven internal ventilation device based on box type baking

Abstract

The utility model belongs to the technical field of flue-cured tobacco modulation, and particularly relates to an oven internal ventilation device based on box-type baking, which comprises a plurality of groups of upper grid plates and lower grid plates, the upper grid plates and the lower grid plates are respectively arranged at the top and the bottom of an oven frame and are used for reinforcing the frame, and the correspondingly arranged upper grid plates and the lower grid plates are positioned in the same vertical plane. The corresponding upper grid plate and the lower grid plate are inserted and matched with the two ends of the exhaust pipe through a preset groove body structure of the upper grid plate and the lower grid plate; the two ends of the exhaust pipe are through, and air holes are formed in a pipe body. The oven is simple in structure, the top grid plate and the bottom grid plate of an existing oven are structurally improved, the exhaust pipe is introduced into the oven, hot airflow can be conveniently and evenly guided into the oven in a dispersed mode, and the tobacco leaf baking quality is improved.

Description

Technical Field

[0001] This utility model belongs to the field of tobacco curing technology, and in particular relates to an internal ventilation device for an oven based on box-type baking. Background Technology

[0002] Box-type tobacco curing is a relatively new method of tobacco curing in recent years. Compared to the traditional hanging rod and clamp-type curing, it adopts a more efficient and faster assembly line loading and mechanized operation mode: after the tobacco leaves are sorted, they are loaded into an oven made of metal mesh and frame via conveyor belt, and then transported by forklift to a specially designed and modified curing barn. The whole process is smooth, time-saving and labor-saving. However, the box-type tobacco loading process is still in the exploration and improvement stage. In particular, the amount of fresh tobacco loaded in each box is as high as several hundred kilograms, the tobacco leaf density is very high and the air permeability inside the box is poor. Whether it is a curing barn with rising or falling hot airflow, it is difficult for the hot airflow to evenly contact the tobacco leaves inside the oven, resulting in uneven heating and difficulty in dehydration of the tobacco leaves. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an internal ventilation device for an oven based on box baking. This utility model has a simple structure, improves the structure of the top and bottom grids of the existing oven and introduces an exhaust pipe into the oven, so as to facilitate the even distribution of hot airflow into the oven and improve the baking quality of tobacco leaves.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] An oven ventilation device based on box baking includes an array of upper and lower grid plates respectively disposed at the top and bottom of the oven frame for reinforcing the frame. The corresponding upper and lower grid plates are in the same vertical plane, and the corresponding upper and lower grid plates are inserted into the two ends of the exhaust pipe through their own preset groove structure.

[0006] The exhaust pipe is open at both ends and has air holes on the pipe body.

[0007] Preferably, the exhaust pipe is composed of several rigid pipe sections and flexible pipe sections connected in sequence, with both ends of the exhaust pipe being rigid pipe sections.

[0008] Preferably, the inner walls of both axial ends of the rigid tube section are integrally provided with flanges, and the inner walls of the flanges are integrally connected to the axial ends of the adjacent flexible tube section.

[0009] Preferably, the vent is located on the outer wall and flange of the rigid tube section.

[0010] Preferably, the flexible tube is a telescopic tube structure made of rubber.

[0011] Preferably, the grid plate includes two ribs extending along the width direction of the oven, and the free ends of the two ribs are bent toward each other to form the groove structure;

[0012] The outer wall of the open end of the rigid pipe at both ends of the exhaust pipe is provided with annular grooves that engage with the bent part of the rib plate.

[0013] The working process of this utility model is as follows:

[0014] First, the oven is laid down as usual, with the metal mesh panel at the back of the oven touching the ground, the door facing upwards and open. Then, the tobacco leaves are fed into the oven via a conveyor belt. At the same time, the staff ensures that the tobacco leaves are fully layered inside the oven.

[0015] Once the oven is filled with a certain amount of tobacco, pause the conveyor belt operation and insert several exhaust pipes into the corresponding upper and lower grilles.

[0016] The annular grooves at both ends of the exhaust pipe are slidably engaged with the ribs of the corresponding grid plates, and then the exhaust pipe is lowered until it presses against the tobacco leaves.

[0017] Then, turn the conveyor belt on again to feed in tobacco leaves until the oven is full. Close the oven door and use a gantry crane to lift the oven and straighten it to complete the filling process. Finally, use a forklift to send the oven into the curing room.

[0018] During the roasting process, the hot air introduced into the oven dries the tobacco leaves and causes the Maillard reaction to occur in their internal chemical components. At the same time, the hot air can smoothly enter the exhaust pipe and be discharged through the vents of the exhaust pipe to the tobacco leaves in contact with the exhaust pipe, so that the tobacco leaves in the oven are heated evenly.

[0019] Meanwhile, the moisture from the tobacco leaves can also enter the exhaust pipe through the vents and circulate to the outside with the hot airflow, preventing the tobacco leaves from becoming waterlogged due to poor drainage.

[0020] The exhaust pipe consists of a rigid section and a flexible section. On the one hand, the elongation or contraction of the flexible section gives the exhaust pipe the ability to deform, because the tobacco leaves below will not be perfectly flat during installation, so its deformation can greatly reduce the difficulty of installation. On the other hand, the rigid section gives the exhaust pipe a certain structural strength to ensure that the internal pipeline is unobstructed. Finally, the flange of the rigid section is also designed with air holes to prevent the exhaust pipe from being unable to exhaust or intake air due to the tobacco leaves being tightly attached to the outer wall air holes.

[0021] Compared with the prior art, the present invention has the following advantages: The present invention has a simple structure, improves the structure of the top and bottom grid plates of the existing oven and introduces an exhaust pipe into the oven, which facilitates the even distribution of hot airflow into the oven and improves the quality of tobacco roasting. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the internal ventilation device of the oven described in a specific embodiment;

[0023] Figure 2 This is a schematic diagram of the assembly structure of the exhaust pipe and grille as described in a specific embodiment;

[0024] Figure 3 This is a schematic diagram of the assembly structure of the exhaust pipe and grille as described in a specific embodiment. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] like Figure 1-3 As shown, an internal ventilation device for an oven based on box baking includes an array of upper grid plates 2 and lower grid plates 3 respectively disposed at the top and bottom of the oven frame 1 for reinforcing the frame. The correspondingly disposed upper grid plates 2 and lower grid plates 3 are in the same vertical plane. The grid plates include two ribs 4 extending along the width direction of the oven, and the free ends of the two ribs 4 are bent toward each other to form a groove structure.

[0027] The exhaust pipe 5 is composed of several rigid pipe sections 51 and flexible pipe sections 55 connected in sequence. Both ends of the exhaust pipe 5 are rigid pipe sections 51 and are open at the ends. The open ends of the rigid pipe sections 51 at both ends of the exhaust pipe 5 are provided with annular grooves 53 on the outer wall. The upper grid plate 2 and the lower grid plate 3 are slidably engaged with the annular grooves 53 through the rib bending part 41 of the groove structure.

[0028] The rigid tube section 51 has flanges 52 integrally formed on the inner walls of both axial ends. The inner walls of the flanges 52 are integrally connected to the axial ends of the adjacent flexible tube section 55. The outer walls of the rigid tube section 51 and the flanges 52 are provided with air holes 54. The flexible tube section 55 is a rubber telescopic corrugated tube structure.

[0029] The working process of this utility model is as follows:

[0030] First, the oven is laid down according to the standard procedure, that is, the metal mesh plate 11 on the back of the oven 1 is close to the ground, the door 12 is facing upward and open, and then the tobacco leaves are sent into the oven 1 by the conveyor belt. At the same time, the staff ensures that the tobacco leaves are fully spread in layers inside the oven 1.

[0031] Once the amount of tobacco leaves inside oven 1 has reached a certain level, pause the conveyor belt operation and insert several exhaust pipes 5 into the corresponding upper grid plate 2 and lower grid plate 3:

[0032] The annular grooves 53 of the rigid pipes at both ends of the exhaust pipe 5 are slidably engaged with the rib bending portions 41 of the corresponding grid plates, and then the exhaust pipe 5 is moved down until it presses against the tobacco leaves.

[0033] Then, turn the conveyor belt on again to feed in tobacco leaves until the oven 1 is full. Close the door 12 and use a gantry crane to lift the oven 1 to straighten it, thus completing the tobacco loading. Finally, use a forklift to send the oven 1 into the curing room.

[0034] During the roasting process, the hot air introduced into the roasting chamber dries the tobacco leaves and causes the Maillard reaction to occur in their internal chemical components. Simultaneously, the hot air smoothly enters the exhaust pipe 5 and exits through the vents 54 to the tobacco leaves surrounding the exhaust pipe 5, ensuring even heating of the tobacco leaves within the oven. At the same time, the moisture released from the tobacco leaves can also enter the exhaust pipe 5 through the vents 54 and circulate to the outside with the hot airflow, preventing poor drainage from causing the tobacco leaves to become waterlogged or spongy.

[0035] The exhaust pipe 5 consists of a rigid pipe section 51 and a flexible pipe section 55. On the one hand, the elongation or contraction of the flexible pipe section 55 gives the exhaust pipe 5 the ability to deform. Since the tobacco leaves below it will not be perfectly flat during installation, its deformation can greatly reduce the difficulty of installation. On the other hand, the rigid pipe section 51 gives the exhaust pipe a certain structural strength to ensure that the internal pipeline is unobstructed. Finally, the flange 52 of the rigid pipe section 51 is also designed with air holes 54 to prevent the exhaust pipe from being unable to exhaust or intake air due to the tobacco leaves being tightly attached to the air holes on its outer wall.

[0036] Of course, the exhaust pipe 5 can also be made entirely of rigid pipe structure, and it works well in a hot air rising oven, but the installation process is more difficult.

Claims

1. An internal ventilation device for an oven based on box baking, comprising an array of upper and lower grid plates respectively disposed at the top and bottom of the oven frame for reinforcing the frame, characterized in that, The corresponding upper and lower grille plates are located in the same vertical plane, and the corresponding upper and lower grille plates are inserted into the two ends of the exhaust pipe through their own preset groove structure; The exhaust pipe is open at both ends and has air holes on the pipe body.

2. The oven internal ventilation device based on box-type baking as described in claim 1, characterized in that, The exhaust pipe is composed of several rigid pipe sections and flexible pipe sections connected in sequence, with both ends of the exhaust pipe being rigid pipe sections.

3. The oven internal ventilation device based on box-type baking as described in claim 2, characterized in that, The inner walls of both axial ends of the rigid tube section are integrally provided with flanges, and the inner walls of the flanges are integrally connected to the axial ends of the adjacent flexible tube section.

4. The oven internal ventilation device based on box baking as described in claim 3, characterized in that, The vents are located on the outer wall and flange of the rigid tube section.

5. The oven internal ventilation device based on box-type baking as described in claim 2, characterized in that, The flexible tube is a telescopic tube structure made of rubber.

6. The oven internal ventilation device based on box baking as described in claim 2, characterized in that, The grid plate includes two ribs extending along the width of the oven, and the free ends of the two ribs are bent toward each other to form the groove structure. The outer wall of the open end of the rigid pipe at both ends of the exhaust pipe is provided with annular grooves that engage with the bent part of the rib plate.

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