Air duct structure of drying area of sheet baking machine

Abstract

The utility model discloses an air duct structure of a drying area of a sheet baking machine, which comprises a cavity, a left hot air inlet and a right hot air inlet are formed on the left side and the right side of the cavity, and a left inclined plate and a right inclined plate which are in one-to-one correspondence are arranged right opposite to the left hot air inlet and the right hot air inlet. The left inclined plate and the right inclined plate are respectively provided with a plurality of ventilation holes, the upper end of the left inclined plate is connected with the right end of a left supporting plate, the upper end of the right inclined plate is connected with the left end of a right supporting plate, and a left flow channel is defined by the left supporting plate, the left inclined plate and the inner wall of the corresponding cavity. A right flow channel is defined by the right supporting plate, the right inclined plate and the inner wall of the corresponding cavity, the left supporting plate is arranged to enable the air speed and pressure of hot air entering from the left hot air inlet to be balanced in the left flow channel, and the right supporting plate is arranged to enable the air speed and pressure of hot air entering from the right hot air inlet to be balanced in the right flow channel. The defects that in the prior art, convection wind generates vortexes and is unstable, and turbulent flow is likely to be generated are overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of slice baking machine equipment, in particular to an air duct structure in a drying area of ​​a slice baking machine. Background Art

[0002] The tobacco leaf drying machine is a device for drying tobacco leaves, and a conveyor chain plate is arranged inside the machine, on which a number of tobacco leaves to be dried are laid flat, and a left air inlet and a right air inlet are formed on opposite sides of the tobacco leaf drying machine located below the conveyor chain plate, such as the left and right sides, respectively; when in use, baking hot air is provided by the air inlet blowers arranged on the left and right sides at the same time, and then enters through the left and right air inlets; the airflow entering from the left and right air inlets is a relative flow of hot air, which is likely to produce turbulence after meeting, making the hot air supplied to the tobacco leaves unstable, which brings about the disadvantages that some tobacco leaves are blown up by a stronger airflow, which is likely to damage the structure of the tobacco leaves, and another part of the tobacco leaves are subjected to a weaker airflow and cannot be fully dried.

[0003] Therefore, how to provide an air duct structure in the drying area of ​​a slice oven that can avoid the above-mentioned disadvantages has become a technical problem that technicians in this field need to solve urgently. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a uniform fusion air duct for convective hot air in the drying area of ​​a slice baking machine, which is used to process the uniform fusion of convective hot air at the junction of the air inlet modes at both ends of the slice baking machine and ensure a uniform wind field in the baking chamber.

[0005] The specific technical solutions are as follows:

[0006] A wind duct structure of a drying area of ​​a tobacco leaf roasting machine comprises a chamber located below tobacco leaves to be dried, the tobacco leaf roasting machine is provided with air inlets connected to the chamber on the left and right sides corresponding to the chamber, which are a left hot air inlet and a right hot air inlet respectively, a left inclined plate and a right inclined plate corresponding to the left hot air inlet and the right hot air inlet are arranged at the middle position of the chamber opposite to the left hot air inlet and the right hot air inlet, a plurality of air holes are respectively arranged on the left inclined plate and the right inclined plate, the lower ends of the left inclined plate and the right inclined plate are abutted against the bottom wall of the chamber and the upper ends of the two are arranged along an extending direction gradually away from each other, and the left inclined plate The upper end is connected to the right end of a left support plate, and the left end of the left support plate abuts against the left side wall of the chamber, the upper end of the right inclined plate is connected to the left end of a right support plate, and the right end of the right support plate abuts against the right side wall of the chamber, the left support plate, the left inclined plate and the corresponding inner wall of the chamber form a left flow channel, and the right support plate, the right inclined plate and the corresponding inner wall of the chamber form a right flow channel, the left support plate is configured to balance the wind speed and pressure of the hot air entering from the left hot air inlet in the left flow channel, and the right support plate is configured to balance the wind speed and pressure of the hot air entering from the right hot air inlet in the right flow channel.

[0007] Preferably, the left support plate is inclined and has a number of evenly arranged left ventilation holes of the same size thereon, the inclination direction of the left support plate is set so that the height of its left end is higher than the height of its right end, the right support plate is inclined and has a number of evenly arranged right ventilation holes of the same size thereon, the inclination direction of the right support plate is set so that the height of its right end is higher than the height of its left end, the inclination angle between the left support plate and the bottom wall of the chamber is 5-7°, and the inclination angle between the right support plate and the bottom wall of the chamber is 5-7°.

[0008] Preferably, the plurality of ventilation holes on the left inclined plate and the right inclined plate are evenly arranged and have the same size, and the diameter of the left ventilation hole and the right ventilation hole is 5 mm.

[0009] Preferably, the lower ends of the left inclined plate and the right inclined plate are butt-jointed to form a V-shape with an angle of 90°, and the two are symmetrically arranged about the joint. The diameter of the air holes on the V-shaped left inclined plate and the right inclined plate is 6 mm, and it also includes an arc-shaped baffle with a plurality of perforations thereon, and the two ends of the arc-shaped baffle are respectively connected to the upper ends of the left inclined plate and the right inclined plate, so that the left inclined plate, the right inclined plate and the arc-shaped baffle form a fusion air duct with a fan-shaped cross-section, and the diameter of the perforation is 7 mm.

[0010] Preferably, the left support plate and the right support plate are symmetrically arranged about the joint.

[0011] Preferably, it also includes a left hot air collecting bin, whose outlet end is connected to the left hot air inlet and whose inlet end is connected to a blower, and a right hot air collecting bin, whose outlet end is connected to the right hot air inlet and whose inlet end is connected to a blower.

[0012] The air duct structure of the drying area of ​​the slice baking machine provided by the utility model has the following technical effects:

[0013] The hot air from the left and right drying areas of the slice oven is blown into the left and right hot air collecting bins by the left and right air inlet blowers at the same time, and enters the air inlet gradient duct (left flow duct and right flow duct) through the hot air inlet port. In the air inlet gradient duct, the hot air flows forward, and part of the hot air flows into the baking bin through the left and right ventilation holes, and the remaining hot air continues to flow forward (the amount of hot air gradually decreases, and the hot air speed and pressure in the entire duct are guaranteed by the gradually narrowing gradient duct, so that the wind speed and pressure in the entire gradient duct are balanced). When it flows to the tail end, it is blocked by the V-shaped left and right inclined plates, and the hot air passes through the air holes of the V-shaped left and right inclined plates and is discharged into the fan-shaped fusion air duct. At this time, the two convection hot air flows are blocked and guided by the V-shaped left and right inclined plates, and the flow directions are changed, the impulse is reduced, and both flow into the fan-shaped fusion air duct. The volume of the fan-shaped fusion air duct gradually increases from bottom to top (the direction of hot air flow), resulting in the two hot air flow rates gradually slowing down and the flow intensity gradually decreasing. During this change process, the two convection hot air flows merge with each other, pass through the arc-shaped baffle at the top of the fan-shaped fusion air duct, and flow into the baking chamber, thereby achieving the purpose of mutual fusion of the convection hot air. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the air duct structure of the drying area of ​​the slice baking machine;

[0015] Figure 2 for Figure 1 Schematic diagram of the V-shaped structure;

[0016] Figure 3 for Figure 1 Schematic diagram of the structure of the fan-shaped fusion air duct.

[0017] Numbers in the figure: 1 conveyor chain plate, 2 left hot air inlet, 3 right hot air inlet, 4 left inclined plate, 5 right inclined plate, 6 air vents, 7 left support plate, 8 right support plate, 9 left flow channel, 10 right flow channel, 11 left ventilation hole, 12 right ventilation hole, 13 arc-shaped baffle, 14 fan-shaped fusion air duct, 15 left hot air collecting bin, 16 right hot air collecting bin. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0019] like Figure 1-3 As shown, Figure 1 It is a structural schematic diagram of the air duct structure of the drying area of ​​the slice baking machine; Figure 2 for Figure 1 Schematic diagram of the V-shaped structure; Figure 3 for Figure 1 Schematic diagram of the structure of the fan-shaped fusion air duct.

[0020] Combination Figure 1-3 In a specific embodiment, an air duct structure of a drying area of ​​a tobacco leaf roasting machine is provided, including a chamber located below the tobacco leaves to be dried, and air inlets connected to the chamber are formed on the left and right sides of the chamber corresponding to the tobacco leaf roasting machine, which are a left hot air inlet 2 and a right hot air inlet 3, respectively. A left inclined plate 4 and a right inclined plate 5 corresponding to the left hot air inlet 2 and the right hot air inlet 3 are arranged at the middle position of the chamber opposite to the left hot air inlet 2 and the right hot air inlet 3, and a plurality of air holes 6 are respectively provided on the left inclined plate 4 and the right inclined plate 5, the lower ends of the left inclined plate 4 and the right inclined plate 5 are abutted against the bottom wall of the chamber, and the upper ends of the two are arranged along an extending direction gradually away from each other, and the left inclined plate 4 and the right inclined plate 5 are arranged along an extending direction gradually away from each other. The upper end of the inclined plate 4 is connected to the right end of a left support plate 7, and the left end of the left support plate 7 abuts against the left side wall of the chamber. The upper end of the right inclined plate 5 is connected to the left end of a right support plate 8, and the right end of the right support plate 8 abuts against the right side wall of the chamber. The left support plate 7, the left inclined plate 4 and the corresponding inner wall of the chamber form a left flow channel 9, and the right support plate 8, the right inclined plate 5 and the corresponding inner wall of the chamber form a right flow channel 10. The left support plate 7 is configured to balance the wind speed and pressure of the hot air entering from the left hot air inlet 2 in the left flow channel 9, and the right support plate 8 is configured to balance the wind speed and pressure of the hot air entering from the right hot air inlet 3 in the right flow channel 10.

[0021] The tobacco leaves to be dried are placed on the conveying chain plate 1 to realize their conveyance.

[0022] Among them, the left support plate 7 is inclined and has a number of evenly arranged left ventilation holes 11 of the same size, the inclination direction of the left support plate 7 is set so that the height of its left end is higher than the height of its right end, the right support plate 8 is inclined and has a number of evenly arranged right ventilation holes 12 of the same size, the inclination direction of the right support plate 8 is set so that the height of its right end is higher than the height of its left end, the inclination angle between the left support plate 7 and the bottom wall of the chamber is 5-7°, the inclination angle between the right support plate 8 and the bottom wall of the chamber is 5-7°, and the diameters of the left ventilation holes 11 and the right ventilation holes 12 are 5mm.

[0023] In a specific implementation manner, the plurality of ventilation holes 6 on the left inclined plate 4 and the right inclined plate 5 are evenly arranged and have the same size.

[0024] Combination Figure 1-3 In a specific embodiment, the lower ends of the left inclined plate 4 and the right inclined plate 5 are butt-jointed to form a V-shape with an angle of 90°, and the two are symmetrically arranged about the butt joint. The diameter of the air holes 6 on the V-shaped left inclined plate 4 and the right inclined plate 5 is 6 mm, and it also includes an arc-shaped baffle 13 with a plurality of perforations thereon, and the two ends of the arc-shaped baffle 13 are respectively connected to the upper ends of the left inclined plate 4 and the right inclined plate 5, so that the left inclined plate 4, the right inclined plate 5 and the arc-shaped baffle 13 enclose a fusion air duct 14 with a fan-shaped cross-section, and the diameter of the perforation is 7 mm.

[0025] In a specific implementation manner, the left support plate 7 and the right support plate 8 are symmetrically arranged about the joint.

[0026] Further, such as Figure 1 As shown, it also includes a left hot air collecting bin 15, whose outlet end is connected to the left hot air inlet 2 and whose inlet end is connected to a blower, and also includes a right hot air collecting bin 16, whose outlet end is connected to the right hot air inlet 3 and whose inlet end is connected to a blower.

[0027] The hot air from the left and right drying areas of the slice oven is blown into the left and right hot air collecting bins by the left and right air inlet blowers at the same time, and enters the air inlet gradient duct (left flow channel 9 and right flow channel 10) through the hot air inlet port. In the air inlet gradient duct, the hot air flows forward, and part of the hot air flows into the baking bin through the left ventilation hole 11 and the right ventilation hole 12, and the remaining hot air continues to flow forward (the amount of hot air gradually decreases, and the hot air speed and pressure in the entire duct are guaranteed by the gradually narrowing gradient duct, so that the wind speed and pressure in the entire gradient duct are balanced). When it flows to the tail end, it is blocked by the V-shaped left inclined plate 4 and the right inclined plate 5. The hot air passes through the vent holes 6 of the V-shaped left inclined plate 4 and the right inclined plate 5 and is discharged into the fan-shaped fusion air duct 14. At this time, the two hot air convections are blocked and guided by the V-shaped left inclined plate 4 and the right inclined plate 5, and the flow direction is changed, the impulse is reduced, and both flow into the fan-shaped fusion air duct 14. The volume of the fan-shaped fusion air duct 14 gradually increases from bottom to top (the direction of hot air flow), resulting in the two hot air flow speeds gradually slowing down and the flow intensity gradually decreasing. In this change process, the two hot air convections merge with each other and pass through the arc-shaped baffle 13 at the top of the fan-shaped fusion air duct 14 to flow into the baking chamber, thereby achieving the purpose of mutual fusion of the convection hot air. The disadvantage of "the convection wind generates vortices, and the instability easily generates turbulence" in the prior art is solved.

[0028] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An air duct structure in the drying area of ​​a slice baking machine, characterized in that: The invention comprises a chamber located below the tobacco leaves to be dried, and air inlets connected to the chamber are formed on the left and right sides of the chamber corresponding to the chamber, which are a left hot air inlet and a right hot air inlet respectively. A left inclined plate and a right inclined plate corresponding to the left hot air inlet and the right hot air inlet are arranged at the middle position of the chamber opposite to the left hot air inlet and the right hot air inlet, and a plurality of air holes are respectively arranged on the left inclined plate and the right inclined plate, and the lower ends of the left inclined plate and the right inclined plate are abutted against the bottom wall of the chamber and the upper ends of the two are arranged along an extending direction gradually away from each other, and the upper end of the left inclined plate is connected to a left support The right end of the support plate, the left end of the left support plate abuts against the left side wall of the chamber, the upper end of the right inclined plate is connected to the left end of a right support plate, and the right end of the right support plate abuts against the right side wall of the chamber, the left support plate, the left inclined plate and the corresponding inner wall of the chamber form a left flow channel, the right support plate, the right inclined plate and the corresponding inner wall of the chamber form a right flow channel, the left support plate is configured to balance the wind speed and pressure of the hot air entering from the left hot air inlet in the left flow channel, and the right support plate is configured to balance the wind speed and pressure of the hot air entering from the right hot air inlet in the right flow channel.

2. The air duct structure of the drying zone of the slice baking machine according to claim 1, characterized in that: The left support plate is inclined and has a number of evenly arranged left ventilation holes of the same size thereon, the inclination direction of the left support plate is set so that the height of its left end is higher than the height of its right end, the right support plate is inclined and has a number of evenly arranged right ventilation holes of the same size thereon, the inclination direction of the right support plate is set so that the height of its right end is higher than the height of its left end, the inclination angle between the left support plate and the bottom wall of the chamber is 5-7°, the inclination angle between the right support plate and the bottom wall of the chamber is 5-7°, and the diameters of the left and right ventilation holes are 5mm.

3. The air duct structure of the drying zone of the slice baking machine according to claim 2, characterized in that: The ventilation holes on the left inclined plate and the right inclined plate are evenly arranged and have the same size.

4. The air duct structure of the drying zone of the slice baking machine according to claim 3, characterized in that: The lower ends of the left inclined plate and the right inclined plate are butt-jointed to form a V-shape with an angle of 90°, and the two are symmetrically arranged about the joint. The diameter of the air holes on the V-shaped left inclined plate and the right inclined plate is 6 mm, and it also includes an arc-shaped baffle plate with a plurality of perforations thereon, and the two ends of the arc-shaped baffle plate are respectively connected to the upper ends of the left inclined plate and the right inclined plate, so that the left inclined plate, the right inclined plate and the arc-shaped baffle plate form a fusion air duct with a fan-shaped cross-section, and the diameter of the perforation is 7 mm.

5. The air duct structure of the drying zone of the slice baking machine according to claim 4, characterized in that: The left support plate and the right support plate are symmetrically arranged about the butt joint.

6. The air duct structure of the drying zone of the slice baking machine according to claim 1, characterized in that: It also includes a left hot air collecting bin, whose outlet end is connected to the left hot air inlet and whose inlet end is connected to a blower, and a right hot air collecting bin, whose outlet end is connected to the right hot air inlet and whose inlet end is connected to a blower.

Images