Balanced convection device of baking tunnel furnace

Abstract

The utility model discloses a baking tunnel furnace balanced convection device which comprises a hearth and a ventilation adjusting mechanism, an inner hearth top plate is fixedly connected to the upper end of the inner side of the hearth, a furnace top plate is fixedly connected to one end of the top of the hearth, a circulating fan is arranged at one end of the furnace top plate, a volute is fixedly connected to one end of the top of the inner hearth top plate, and a fan turbine is arranged in the volute. One side in the hearth is fixedly connected with a front air pipe, the other side in the hearth is fixedly connected with a rear air pipe, and one end of the top of the front air pipe is fixedly connected with a top transverse through pipe; by adopting the layout of the bottom fire tube and the top hot air tube, during working, the bottom fire tube heats the hearth to form rising hot air flow, the circulating fan sucks hot air at the top of the hearth, a fan turbine in the volute is driven by the transmission part to rotate, and the hot air is pushed to the top transverse through tube; the air guide plate guides hot air to enter the front side air pipe and the rear side air pipe which are longitudinally distributed and can be assembled in a segmented mode according to needs, the symmetrical structure of the air guide plate is guaranteed by the volute, and baking uniformity is facilitated.

Description

Technical Field

[0001] This utility model relates to the technical field of balanced convection equipment for baking tunnel ovens, specifically a balanced convection device for baking tunnel ovens. Background Technology

[0002] A baking tunnel oven, also known as a tunnel baking oven, semi-enclosed oven, or dryer, is a tunnel-type mechanical device that uses hot air circulation for heating. It utilizes the principles of heat conduction, convection, and radiation, and through a continuously operating conveyor system inside the tunnel, materials are evenly passed through the conveyor belt and baked. It is suitable for large-volume, continuous, or intermittent baking operations and is widely used in many industries such as food processing, wood processing, paint and coating, textiles, and printing.

[0003] The balanced convection device inside the baking tunnel oven can create convection circulation of hot air, ensuring that the materials are heated evenly during the baking process, thus improving baking efficiency and quality. However, some existing balanced convection devices in baking tunnel ovens are difficult to precisely control the ventilation volume at different locations, resulting in uneven distribution of hot air in the oven chamber. This can easily lead to local overheating or undercooling, thereby affecting the quality and consistency of the baked products. Summary of the Invention

[0004] The purpose of this invention is to address the problem that existing balanced convection devices for baking tunnel ovens are difficult to precisely control the ventilation volume at different locations, resulting in uneven distribution of hot air within the oven chamber and the potential for localized overheating or undercooling, which affects the quality and consistency of baked products. This invention provides a balanced convection device for baking tunnel ovens.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a balanced convection device for a baking tunnel oven, comprising: an oven chamber and an adjustable ventilation mechanism. An inner top plate is fixedly connected to the upper inner side of the oven chamber, and a top plate is fixedly connected to one end of the top of the oven chamber. A circulating fan is provided at one end of the top plate. A vortex shell is fixedly connected to one end of the top of the inner top plate, and a fan turbine is provided inside the vortex shell. A front air duct is fixedly connected to one side of the oven chamber, and a rear air duct is fixedly connected to the other side of the oven chamber. A top transverse passage pipe is fixedly connected to one end of the front air duct, and a guide plate is fixedly connected inside the top transverse passage pipe. Longitudinal passage pipes are distributed longitudinally at both ends of the guide plate, and longitudinal passage pipes are distributed longitudinally at both ends of the rear air duct.

[0006] As a further embodiment of this utility model: the adjustable ventilation mechanism includes an air box, guide plates, and sealing plates. The guide plates are symmetrically fixedly connected to the upper and lower ends of one side of the air box, and the sealing plates are fixedly connected between the guide plates and to the air box. A baffle, adjusting screw, pin, and wing nut are also included. The baffle is located inside the air box, the adjusting screw is movably connected to the inner side of the baffle, and both ends of the adjusting screw pass through the air box and the sealing plate. The pin is fixedly connected to the lower end of the inner side of the air box and passes through the baffle, rotatably connected to the baffle. The wing nut and adjusting screw are located at one end of the adjusting screw. A flange and a cover plate are also included. The flange is symmetrically fixedly connected to both ends of the air box, and the cover plate is fixedly connected to the top of the air box.

[0007] As a further improvement of this utility model: a chain plate is provided at the other end of the furnace chamber, and the number of chain plates is provided in multiple sets.

[0008] As a further improvement of this utility model, heat insulation cotton is provided between the furnace top plate and the inner furnace top plate.

[0009] As a further embodiment of this utility model: the furnace top plate is provided in multiple sets and is symmetrically arranged at the top of the furnace chamber. The circulating fan is located at the top of one set of furnace top plates. The transmission component of the circulating fan passes through one set of furnace top plates and the volute and is fixedly connected to the fan turbine. The side end of the volute is fixedly connected to the top transverse pipe.

[0010] As a further improvement of this utility model: the number of the adjustable ventilation mechanism is provided in multiple sets, which are symmetrically arranged between the front air duct, the rear air duct, and the longitudinal through pipe one and the longitudinal through pipe two.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention employs a bottom fire tube and top hot air tube layout. During operation, the bottom fire tube heats the furnace chamber, creating an upward hot airflow. A circulating fan draws in hot air from the top of the furnace chamber, and the transmission components drive the turbine inside the volute to rotate, pushing the hot air to the top horizontal duct. Air guides guide the hot air into the longitudinally distributed front and rear air ducts, which can be assembled in sections as needed. The symmetrical structure is ensured by the volute, facilitating even baking. The air outlet assembly includes two longitudinal ducts, each with an adjustable baffle. For initial use, the fan is run, and the adjusting screw is rotated to make the baffle rotate around the pivot pin, changing the cross-sectional area of ​​the air box ventilation channel. The baffle is then locked with a butterfly nut to adjust the ventilation volume. Hot air is blown through the outlet onto the chain plate for product baking. The hot air is repeatedly circulated within the system. Multiple chain plates provide a baking platform for the products, which move on the chain plates. Insulation cotton reduces heat loss from the top, achieving energy saving and improving efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the furnace structure in this utility model;

[0015] Figure 3 This is a schematic diagram of the top horizontal through-tube structure in this utility model;

[0016] Figure 4 This is a schematic diagram of the air guide plate in this utility model;

[0017] Figure 5 Here is a schematic diagram of the ventilation adjustment mechanism in this utility model:

[0018] Figure 6 This is a schematic diagram of the structure of the baffle in this utility model.

[0019] In the diagram: 1. Furnace chamber; 2. Inner chamber top plate; 3. Furnace top plate; 4. Circulating fan; 5. Fan turbine; 6. Front air duct; 7. Rear air duct; 8. Top transverse duct; 9. Air guide plate; 10. Longitudinal duct one; 11. Longitudinal duct two; 12. Adjusting ventilation mechanism; 1201. Air box; 1202. Guide plate; 1203. Sealing plate; 1204. Baffle; 1205. Adjusting screw; 1206. Shaft pin; 1207. Wing nut; 1208. Flange; 1209. Cover plate; 13. Chain plate; 14. Insulation cotton; 15. Volute. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will be described below based on its overall structure.

[0022] Reference Figures 1 to 6 In this embodiment of the present invention, the balanced convection device of the baking tunnel oven includes: a furnace chamber 1 and an adjusting ventilation mechanism 12. The furnace chamber 1 serves as the main structure of the entire baking tunnel oven. An inner top plate 2 is fixedly connected to the upper inner side of the furnace chamber 1. Located at the upper inner side of the furnace chamber, it plays the role of supporting and separating the internal space of the furnace chamber. A furnace top plate 3 is fixedly connected to one end of the top of the furnace chamber 1, providing an installation position for other components and helping to cover and seal the inside of the furnace chamber.

[0023] A circulating fan 4 is provided at one end of the furnace top plate 3, which is the power source of the entire device. A volute 15 is fixedly connected to one end of the top of the inner furnace top plate 2. A fan turbine 5 is installed inside the volute 15. The volute 15 provides space for the installation and operation of the fan turbine 5, and at the same time helps to guide the flow direction of the airflow, making it more concentrated and orderly to flow to the predetermined pipe. A front air duct 6 is fixedly connected to one side of the furnace 1, which is an important part of the ventilation system. A rear air duct 7 is fixedly connected to the other side of the furnace 1, which also plays the role of transporting hot air.

[0024] A top transverse duct 8 is fixedly connected to one end of the front air duct 6. A guide vane 9 is fixedly connected inside the top transverse duct 8. The top transverse duct 8 receives airflow from the blower turbine 5 and guides the airflow into different longitudinal ducts through the internal guide vane 9, achieving lateral distribution and transport of hot air at the top of the furnace. Longitudinal ducts 1-10 are longitudinally distributed at both ends of the guide vane 9. Longitudinal ducts 2-2-11 are longitudinally distributed at both ends of the rear air duct 7. The longitudinal ducts 2-2-11 and 1-10 together achieve longitudinal airflow within the furnace. The airflow distribution ensures that the hot air is evenly distributed in the furnace chamber, improving the uniformity of baking. There are multiple sets of furnace top plates 3, which are symmetrically arranged on the top of the furnace chamber 1. The circulating fan 4 is located on the top of one set of furnace top plates 3. The transmission component of the circulating fan 4 passes through one set of furnace top plates 3 and the volute 15 and is fixedly connected to the fan turbine 5. The side end of the volute 15 is fixedly connected to the top transverse pipe 8. There are multiple sets of ventilation adjustment mechanisms 12, which are symmetrically arranged between the front air duct 6 and the rear air duct 7, as well as the longitudinal pipe 10 and the longitudinal pipe 2 11.

[0025] Reference Figure 3 , Figure 5 and Figure 6 The ventilation regulating mechanism 12 includes an air box 1201, a guide plate 1202, and a sealing plate 1203. The air box 1201 is the main component of the ventilation regulating mechanism 12, providing space for the installation and operation of other regulating components. It regulates the ventilation volume through its internal structure and components. The guide plate 1202 is symmetrically fixedly connected to the upper and lower ends of one side of the air box 1201, which plays a certain guiding role in the airflow in the air box and assists the airflow. The sealing plate 1203 is fixedly connected between the guide plates 1202 and fixedly connected to the air box 1201, which plays a certain sealing and structural fixing role, preventing airflow from leaking from unwanted places.

[0026] The components include a baffle 1204, an adjusting screw 1205, a pivot pin 1206, and a wing nut 1207. The baffle 1204 is located inside the air box 1201. Adjusting its angle changes the ventilation area within the air box, thereby regulating the ventilation volume. The adjusting screw 1205 is movably connected to the inside of the baffle 1204. Rotating the adjusting screw 1205 changes the angle of the baffle 1204, thus regulating the ventilation volume. Both ends of the adjusting screw 1205 pass through the air box 1201. 1 and sealing plate 1203, shaft pin 1206 are fixedly connected to the lower inner side of the air box 1201 and pass through baffle 1204, and are rotatably connected to baffle 1204, so that baffle 1204 can rotate around shaft pin, providing rotation support for baffle angle adjustment. Butterfly nut 1207 and adjusting screw 1205 are located at one end of adjusting screw 1205, and can be tightened or loosened by manual operation. After adjusting the angle of baffle 1204, the adjusting screw 1205 is locked.

[0027] Flange 1208 and cover plate 1209 are symmetrically fixedly connected to both ends of the air box 1201, which facilitates the connection of the air box 1201 with other components and ensures the sealing and connection reliability of the entire ventilation system. Cover plate 1209 is fixedly connected to the top of the air box 1201.

[0028] Reference Figure 1 and Figure 2 The other end of the furnace chamber 1 is equipped with a chain plate 13 for carrying the items to be baked. There are multiple sets of chain plates 13. There is insulation cotton 14 between the furnace top plate 3 and the inner top plate 2, which plays a role in heat insulation, reducing heat loss in the furnace chamber, improving heat utilization efficiency, and ensuring stable temperature in the furnace chamber.

[0029] The working principle of this utility model is as follows: This baking tunnel oven adopts a bottom fire tube and top hot air tube layout. During operation, the bottom fire tube heats the furnace chamber, causing the air to heat up and form an upward hot airflow. The circulating fan 4 at the top of the furnace chamber is crucial. Its air intake is connected to the top of the furnace chamber. After starting, it drives the fan turbine 5 inside the volute 15 to rotate through the transmission component, drawing the hot air from the top of the furnace chamber into the fan and pushing it to the top transverse pipe 8. The air guide plate 9 inside the top transverse pipe 8 guides the hot air through the air guide arc plate and into the longitudinally distributed front air pipe 6 and rear air pipe 7. The two can be assembled in sections to set the length as needed. Their symmetrical structure is ensured by the dedicated volute 15, ensuring that the airflow distribution is uniform and stable when the hot air is split, which is beneficial to the uniformity of baking. The air outlet components inside the furnace chamber include longitudinal pipe one 10 and longitudinal pipe two 11 connecting the front and rear air pipes, etc., which are symmetrically distributed. The internal sections are equipped with adjustable angle baffles 1204. Upon initial use, the fan is operated to establish a stable airflow circulation. The airflow force at each air vent is measured. By rotating the adjusting screw 1205 (which passes through the air box 1201 and the sealing plate 1203 and is connected to the inside of the baffle 1204), the baffle 1204 rotates around the shaft pin 1206, changing the cross-sectional area of ​​the ventilation channel in the air box 1201 to adjust the ventilation volume. Then, the adjusting screw 1205 is locked with the butterfly nut 1207 to ensure stable ventilation. After adjustment by the air outlet assembly, hot air is blown onto the products on the chain plate 13 through the air outlet for baking. The circulating fan allows the hot air to circulate within the system, avoiding excessive heat loss and achieving energy saving. Multiple sets of chain plates 13 are set according to the furnace size and baking output to provide a continuous baking platform for the products. The products move on the chain plates to receive baking. The insulation cotton 14 between the furnace top plate 3 and the inner furnace top plate 2 can reduce heat loss from the top, enhance the energy-saving effect, improve heat utilization efficiency, and reduce energy consumption.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A balanced convection device for a baking tunnel oven, characterized in that, include: The furnace and ventilation regulating mechanism include an inner top plate fixedly connected to the upper inner side of the furnace, a furnace top plate fixedly connected to one end of the furnace top, a circulating fan at one end of the furnace top plate, a volute fixedly connected to one end of the inner top plate, a fan turbine inside the volute, a front air duct fixedly connected to one side of the furnace interior, a rear air duct fixedly connected to the other side of the furnace interior, a top transverse pipe fixedly connected to one end of the front air duct, a guide plate fixedly connected inside the top transverse pipe, longitudinally distributed longitudinally through pipes one at both ends of the guide plate, and longitudinally distributed longitudinally through pipes two at both ends of the rear air duct.

2. The balanced convection device for the baking tunnel oven according to claim 1, characterized in that, The ventilation regulating mechanism includes: The wind box, guide plates, and sealing plates are provided. The guide plates are symmetrically and fixedly connected to the upper and lower ends of one side of the wind box. The sealing plates are fixedly connected between the guide plates and are also fixedly connected to the wind box. The components include a baffle, an adjusting screw, a shaft pin, and a wing nut. The baffle is located inside the air box. The adjusting screw is movably connected to the inside of the baffle, and both ends of the adjusting screw pass through the air box and the sealing plate. The shaft pin is fixedly connected to the lower end of the inside of the air box and passes through the baffle, rotatably connected to the baffle. The wing nut and the adjusting screw are located at one end of the adjusting screw. Flanges and cover plates are provided, with the flanges symmetrically fixedly connected to both ends of the air box and the cover plates fixedly connected to the top of the air box.

3. The balanced convection device for the baking tunnel oven according to claim 1, characterized in that, The furnace interior is equipped with a chain plate at the other end, and there are multiple sets of the chain plates.

4. The balanced convection device for the baking tunnel oven according to claim 1, characterized in that, Insulating cotton is provided between the furnace top plate and the inner furnace top plate.

5. The balanced convection device for a baking tunnel oven according to claim 1, characterized in that, The furnace top plate is provided in multiple sets and is symmetrically arranged at the top of the furnace chamber. The circulating fan is located on the top of one set of furnace top plates. The transmission component of the circulating fan passes through one set of furnace top plates and the volute and is fixedly connected to the fan turbine. The side end of the volute is fixedly connected to the top transverse pipe.

6. The balanced convection device for a baking tunnel oven according to claim 1, characterized in that, The number of the adjustable ventilation mechanism is provided in multiple sets, which are symmetrically arranged between the front air duct, the rear air duct, and the longitudinal through pipe one and the longitudinal through pipe two.

Images