Low-noise light-weight drying furnace

Abstract

The utility model provides a low noise light weight drying furnace relates to drying furnace field, including furnace body, hot air circulation mechanism and burner protective tube, the hot air circulation mechanism includes circulating fan and circulating air duct, circulating air duct includes through connection upper air duct, side air duct and lower air duct, the outlet of burner protective tube is inserted in the delivery cavity channel, and the outlet of burner protective tube is inserted in the delivery cavity channel. High-temperature gas in the burner protection pipe is directly sprayed into the conveying cavity channel in the axis direction of the burner protection pipe, and the axial flow fan intermittently switches forward rotation and reverse rotation, so that circulating hot air is intermittently conveyed clockwise or anticlockwise along the circulating air channel, and the circulating hot air intermittently switches to spray products on the mesh belt from the upper portion or the lower portion. And therefore, the structures of the hot air circulating mechanism and the burner protection pipe are effectively optimized, the utilization efficiency of hot circulating air can be improved, the equipment size and cost can be reduced, lightweight design can be achieved, and the working noise of the equipment can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of drying furnaces, in particular to a low-noise and lightweight drying furnace. Background Art

[0002] Brazing drying furnace is a kind of equipment used for metal brazing and bright heat treatment. It is widely used in brazing and heat treatment of stainless steel, carbon steel, brass and other materials in industrial production. As a kind of efficient heat treatment equipment, brazing drying furnace plays an important role in industrial production.

[0003] The existing brazing drying furnace needs to perform a full range of drying and heat treatment on the product. Limited by the design of conventional circulating fans and air ducts, the circulating hot air can only flow in one direction to spray the product. In order to achieve full range of upward and downward blowing of the product, the length of the drying furnace can only be lengthened. Therefore, the conventional drying furnace occupies a large area, is bulky and has high energy consumption. In addition, the existing burner protective tube runs through the conveying cavity, and a strip-shaped air outlet similar to a whistle is opened on the side wall of the burner protective tube. When the drying furnace is working, the noise is relatively large. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies existing in the prior art and provide a low-noise and lightweight drying furnace, which can not only improve the utilization efficiency of the hot circulating air, reduce the size and cost of the equipment, realize lightweight design, but also greatly reduce the noise of the equipment operation by effectively optimizing the structure of the hot air circulation mechanism and the burner protection tube.

[0005] The utility model is realized through the following technical solutions:

[0006] A low-noise and lightweight drying furnace comprises a furnace body, a hot air circulation mechanism and a burner protective tube, wherein a conveying cavity which passes through the furnace body from front to back is provided in the middle part of the furnace body, a mesh belt for conveying products is arranged in the conveying cavity, the hot air circulation mechanism comprises a circulating fan and a circulating air duct, the circulating air duct is arranged between the conveying cavity and the furnace body, the circulating fan is fixedly installed in the upper part of the furnace body, the circulating air duct comprises an upper air duct, a side air duct and a lower air duct which are connected through each other, the upper air duct and the lower air duct are respectively connected with the upper part and the lower part of the conveying cavity, the inlet of the burner protective tube is connected with the burner through a flange, the outlet of the burner protective tube is inserted into the conveying cavity, and the high-temperature gas in the burner protective tube is directly sprayed into the conveying cavity along the axial direction of the burner protective tube.

[0007] It can be seen that in the above technical solution, the circulating air duct includes an upper air duct, a side air duct and a lower air duct that are connected through each other, and the upper air duct and the lower air duct are respectively connected to the upper and lower parts of the conveying cavity, and the circulating fan is fixedly installed on the upper part of the furnace body, and the outlet of the burner protective tube is inserted into the conveying cavity. The high-temperature gas in the burner protective tube is directly sprayed into the conveying cavity along the axial direction of the burner protective tube, thereby effectively optimizing the structure of the hot air circulation mechanism and the burner protective tube, which can not only improve the utilization efficiency of the hot circulating air, reduce the size and cost of the equipment, realize lightweight design, but also greatly reduce the noise of the equipment operation.

[0008] According to the above technical solution, preferably, the circulating fan is an axial flow fan, and the axial flow fan intermittently switches between forward and reverse rotation, and the circulating hot air is intermittently transported clockwise or counterclockwise along the circulating air duct, and the circulating hot air intermittently switches to spray the product on the mesh belt from above or below.

[0009] It can be seen that in the above technical solution, the circulating air duct is optimized in design, and the axial flow fan intermittently switches between forward and reverse rotation, so that the circulating hot air is intermittently transported clockwise or counterclockwise along the circulating air duct, and the circulating hot air is intermittently switched to spray the product on the mesh belt from above or below, thereby achieving all-round drying and heat treatment of the product, thereby reducing the overall size of the equipment and reducing the equipment cost.

[0010] According to the above technical solution, preferably, a mesh belt support frame is provided between the conveying cavity and the downwind duct, the mesh belt support frame is fixedly connected to the furnace body, and the mesh belt support frame is a round steel herringbone structure.

[0011] It can be seen that in the above technical solution, compared with the conventional punching support plate, the heating structure of the mesh belt support frame with a round steel fishbone structure is more stable and can effectively avoid problems such as deformation of the conventional punching support plate.

[0012] According to the above technical solution, preferably, the furnace body includes a high-temperature resistant inner thermal insulation layer, and the inner thermal insulation layer is arranged on the outside of the circulating air duct.

[0013] It can be seen that in the above technical solution, the high temperature resistant inner insulation layer can effectively enhance the insulation effect of the drying furnace, reduce the energy consumption of equipment operation, make temperature control more precise, and improve product quality.

[0014] According to the above technical solution, preferably, a J-shaped air guide plate is provided at the connection between the downwind duct and the side air duct, the J-shaped air guide plate is fixedly connected to the mesh belt support frame, and the air inlet of the J-shaped air guide plate coincides with the central axis of the side air duct.

[0015] It can be seen that in the above technical solution, the J-shaped air guide plate is used to guide the hot circulating air, so that the hot circulating air heats the product more evenly from the bottom.

[0016] According to the above technical solution, preferably, the depth of the burner protection tube inserted into the delivery cavity is less than half of the width of the delivery cavity.

[0017] It can be seen that in the above technical solution, since the depth of the burner protective tube inserted into the delivery cavity is less than half of the width of the delivery cavity, the high-temperature gas in the burner protective tube can directly and smoothly enter the delivery cavity, thereby improving the utilization rate of the high-temperature gas.

[0018] The beneficial effects of the utility model are:

[0019] (1) The circulating air duct of the present invention includes an upper air duct, a side air duct and a lower air duct which are connected through each other. The upper air duct and the lower air duct are respectively connected to the upper and lower parts of the conveying cavity. The circulating fan is fixedly installed on the upper part of the furnace body. The outlet of the burner protective tube is inserted into the conveying cavity. The high-temperature gas in the burner protective tube is directly sprayed into the conveying cavity along the axial direction of the burner protective tube, thereby effectively optimizing the structure of the hot air circulation mechanism and the burner protective tube, which can not only improve the utilization efficiency of the hot circulating air, reduce the volume and cost of the equipment, realize lightweight design, but also greatly reduce the noise of the equipment operation;

[0020] (2) The circulating air duct of this patent is optimized in design, and the axial flow fan intermittently switches between forward and reverse rotation, so that the circulating hot air is intermittently transported clockwise or counterclockwise along the circulating air duct, and the circulating hot air is intermittently switched to spray the product on the mesh belt from above or below, thereby achieving all-round drying and heat treatment of the product, thereby reducing the overall size of the equipment and reducing the equipment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the main structure of an embodiment of the utility model is shown;

[0022] Figure 2 A schematic diagram of the top view of the mesh belt support frame in an embodiment of the utility model is shown;

[0023] Description of reference numerals:

[0024] 1. Furnace body; 2. Hot air circulation mechanism; 3. Burner protection tube; 4. Conveying cavity; 5. Circulation fan; 6. Circulation air duct; 7. Upper air duct; 8. Side air duct; 9. Lower air duct; 10. Mesh belt support frame; 11. Inner insulation layer; 12. J-shaped air guide plate. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and the best embodiment. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the utility model.

[0026] In the description of the utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the utility model.

[0027] As shown in the figure, this embodiment provides a low-noise lightweight drying furnace, including a furnace body 1, a hot air circulation mechanism 2 and a burner protection tube 3, wherein the middle part of the furnace body 1 is provided with a conveying cavity 4 that passes through from front to back, and a mesh belt for conveying products is arranged in the conveying cavity 4, and the hot air circulation mechanism 2 includes a circulating fan 5 and a circulating air duct 6, and the circulating air duct 6 is arranged between the conveying cavity 4 and the furnace body 1, and the circulating fan 5 is fixedly installed on the upper part of the furnace body 1. Further, the circulating air duct 6 includes an upper air duct 7, a side air duct 8, and a heat exchanger 9. The upper air duct 8 and the lower air duct 9, the upper air duct 7 and the lower air duct 9 are respectively connected with the upper and lower parts of the conveying cavity 4, the inlet of the burner protective tube 3 is connected with the burner through a flange, the outlet of the burner protective tube 3 is inserted into the conveying cavity 4, and the high-temperature gas in the burner protective tube 3 is directly sprayed into the conveying cavity 4 along the axial direction of the burner protective tube 3, and the circulating fan 5 is an axial flow fan, the axial flow fan intermittently switches between forward and reverse rotation, and the circulating hot air is intermittently conveyed clockwise or counterclockwise along the circulating air duct 6, and the circulating hot air is intermittently switched to spray the product on the mesh belt from the top or bottom.

[0028] The circulating air duct 6 of the present patent includes an upper air duct 7, a side air duct 8 and a lower air duct 9 which are connected through each other. The upper air duct 7 and the lower air duct 9 are respectively connected to the upper and lower parts of the conveying cavity 4, and the circulating fan 5 is fixedly installed on the upper part of the furnace body 1. The outlet of the burner protective tube 3 is inserted into the conveying cavity 4. The high-temperature gas in the burner protective tube 3 is directly sprayed into the conveying cavity 4 along the axial direction of the burner protective tube 3, thereby effectively optimizing the structure of the hot air circulation mechanism and the burner protective tube 3, which can not only improve the utilization efficiency of the hot circulating air, reduce the volume and cost of the equipment, realize lightweight design, but also greatly reduce the noise of the equipment operation; through the optimized design of the circulating air duct 6, and the intermittent switching of the axial flow fan between forward and reverse rotation, the circulating hot air is intermittently conveyed clockwise or counterclockwise along the circulating air duct 6, and the circulating hot air is intermittently switched to spray the product on the mesh belt from the top or bottom, so as to realize the all-round drying and heat treatment of the product, thereby reducing the overall size of the equipment and reducing the equipment cost.

[0029] Optionally, in a possible embodiment, a mesh belt support frame 10 is provided between the conveying cavity 4 and the downwind duct 9, and the mesh belt support frame 10 is fixedly connected to the furnace body 1. The mesh belt support frame 10 is a round steel fishbone structure. Compared with a conventional perforated support plate, the heating structure of the mesh belt support frame 10 with a round steel fishbone structure is more stable, and can effectively avoid problems such as deformation of a conventional perforated support plate.

[0030] Optionally, in a possible embodiment, the furnace body 1 includes a high-temperature resistant inner insulation layer 11, and the inner insulation layer 11 is arranged on the outside of the circulating air duct 6. The high-temperature resistant inner insulation layer 11 can effectively enhance the insulation effect of the drying furnace, reduce the energy consumption of equipment operation, make temperature control more precise, and improve product quality.

[0031] Optionally, in a possible embodiment, a J-shaped air guide plate 12 is provided at the connection between the lower air duct 9 and the side air duct 8. The J-shaped air guide plate 12 is fixedly connected to the mesh belt support frame 10. The air inlet of the J-shaped air guide plate 12 coincides with the central axis of the side air duct 8. The J-shaped air guide plate 12 is used to guide the hot circulating air so that the hot circulating air can heat the product more evenly from the bottom.

[0032] Optionally, in a possible implementation, the depth of the burner protective tube 3 inserted into the delivery cavity 4 is less than half the width of the delivery cavity 4, so that the high-temperature gas in the burner protective tube 3 directly and smoothly enters the delivery cavity 4, thereby improving the utilization rate of the high-temperature gas.

[0033] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A low-noise, lightweight drying furnace, characterized in that: It includes a furnace body, a hot air circulation mechanism and a burner protective tube. A conveying cavity that passes through the furnace body is provided in the middle of the furnace body. A mesh belt for conveying products is arranged in the conveying cavity. The hot air circulation mechanism includes a circulation fan and a circulation duct. The circulation duct is arranged between the conveying cavity and the furnace body. The circulation fan is fixedly installed on the upper part of the furnace body. The circulation duct includes an upper duct, a side duct and a lower duct that are connected through each other. The upper duct and the lower duct are respectively connected to the upper and lower parts of the conveying cavity. The inlet of the burner protective tube is connected to the burner through a flange. The outlet of the burner protective tube is inserted into the conveying cavity. The high-temperature gas in the burner protective tube is directly sprayed into the conveying cavity along the axial direction of the burner protective tube.

2. A low-noise, lightweight drying furnace according to claim 1, characterized in that: The circulating fan is an axial flow fan, which intermittently switches between forward and reverse rotation, and the circulating hot air is intermittently transported clockwise or counterclockwise along the circulating air duct, and the circulating hot air is intermittently switched to spray the product on the mesh belt from above or below.

3. A low-noise, lightweight drying furnace according to claim 1, characterized in that: A mesh belt support frame is provided between the conveying cavity and the downwind duct, the mesh belt support frame is fixedly connected to the furnace body, and the mesh belt support frame is a round steel fishbone structure.

4. A low-noise, lightweight drying furnace according to claim 1, characterized in that: The furnace body comprises a high temperature resistant inner thermal insulation layer, and the inner thermal insulation layer is arranged on the outer side of the circulating air duct.

5. A low-noise, lightweight drying furnace according to claim 3, characterized in that: A J-shaped air guide plate is provided at the connection between the lower air duct and the side air duct. The J-shaped air guide plate is fixedly connected to the mesh belt support frame. The air inlet of the J-shaped air guide plate coincides with the central axis of the side air duct.

6. A low-noise, lightweight drying furnace according to claim 1, characterized in that: The depth of the burner protection tube inserted into the delivery cavity is less than half of the width of the delivery cavity.

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