Partitioned and layered air guide homogenizing furnace

Abstract

A furnace body is internally divided into a heating chamber and an air duct by a first partition plate, the heating chamber is arranged in the middle of a hearth, the air duct surrounds the upper side, the left side and the right side of the heating chamber, the interior of the air duct on the left side is divided into a plurality of air areas by second partition plates, and a circulating fan is arranged in each air area. A heating device is arranged in the upper-side air duct, an air guide device is arranged in the right-side air duct, an inlet of the circulating fan is communicated with the heating chamber, an outlet is communicated with the circulating air duct, and the heating chamber is communicated with the right-side air duct through the air guide device; the air guide device is used for dividing air discharged by the circulating fans entering the right air duct into N areas and M layers and horizontally blowing the air to the heating chamber, the number of the N areas is consistent with that of the circulating fans, and M is a natural number larger than 2. The furnace temperature uniformity is good, and the aluminum material heat treatment quality is uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of heat treatment equipment, in particular to a zoned and layered air-guiding homogenizing furnace. Background Art

[0002] Homogenizing furnace is a heat treatment equipment used for annealing or aging of aluminum bars and aluminum profiles in the non-ferrous metal industry. Its working principle is to use high temperature to heat aluminum to achieve a uniform temperature distribution, thereby achieving homogenization of the aluminum; homogenization can rearrange the grains inside the aluminum, eliminate impurities and internal stress, and improve its mechanical and physical properties.

[0003] Chinese patent CN110512157A discloses a homogenizing furnace for heat treatment of aluminum bars and plate ingots. The furnace is evenly divided into several zones along the length direction. Each zone is equipped with a high-temperature axial flow circulation fan with an air guide tube and a partition. The heating elements are arranged on the side walls of the fan, and half of them are on the upper part of the circulation fan and the other half are on the lower part of the circulation fan. Through the guide device, the wind from the fan is divided into two parts, upper and lower, which respectively pass through the channels on the top and bottom of the furnace to reach the opposite side. Under the action of the guide device, it flows through the homogenized material and returns to the circulation fan, forming two upper and lower forced convection cycles. The upper part of the circulating wind and the lower part of the existing patent converge in the middle and affect each other, resulting in different air volume and wind speed between the middle layer and the upper and lower layers, inconsistent temperatures in the heating chamber, and uneven quality of aluminum heat treatment. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a partitioned and layered air-guiding homogenizing furnace.

[0005] The technical solution adopted by the utility model is:

[0006] A zoned and layered air-guiding homogenizing furnace, wherein the furnace body is divided into a heating chamber and an air duct by a first partition, the heating chamber is arranged in the middle part of the furnace, the air duct surrounds the upper side and the left and right sides of the heating chamber, the left air duct is divided into a plurality of air zones by a second partition, each air zone is provided with a circulating fan, a heating device is arranged in the upper air duct, an air-guiding device is arranged in the right air duct, the inlet of the circulating fan is communicated with the heating chamber, the outlet is communicated with the circulating air duct, the heating chamber is communicated with the right air duct through the air-guiding device; the air-guiding device is used for dividing the circulating fan outlet air entering the right air duct into N zones and M layers and blowing the air horizontally to the heating chamber, the number of N zones is consistent with that of the circulating fan, and M is a natural number greater than 2.

[0007] Furthermore, the air guiding device includes an air duct partition plate, an air duct air inlet frame, an air guide plate and an air duct air outlet frame; the air duct partition plate divides the right air duct into N air supply areas, namely N areas, and one air supply area corresponds to one circulation fan; the air duct air inlet frame is horizontally arranged at the inlet of the right air duct, dividing the right air duct inlet into N air inlets; the air duct air outlet frame is vertically arranged between the heating chamber and the right air duct, dividing the right air duct outlet into N air outlets; one air supply area corresponds to one air inlet and one air outlet, and each air supply area is installed with a plurality of parallel air guide plates, the upper end of the air guide plate is connected to the air inlet, and the lower end is connected to the air outlet, so that each air supply area is divided into M layers of air supply units.

[0008] Furthermore, the air inlet frame of the air duct is made of steel sections, and includes a horizontal fixing frame connecting the two ends of the air guide plate and a horizontal reinforcing rib connecting the middle part of the air guide plate.

[0009] Furthermore, the air outlet frame of the air duct is made of steel sections, and includes a vertical fixing frame connecting the two ends of the air guide plate and a vertical reinforcing rib connecting the middle part of the air guide plate.

[0010] Furthermore, the air guide plate includes a vertical plate portion connected to the air inlet and a horizontal plate portion connected to the air outlet, and the vertical plate portion and the horizontal plate portion are connected by an arc-shaped plate portion.

[0011] Furthermore, the vertical plate portion of the last air guide plate is the right side wall of the furnace.

[0012] The beneficial effects of the utility model are as follows: the air from the circulating fan enters the right side air duct through the left side air duct and the upper side air duct, and is divided into N zones and M layers by the air guide device in the right side air duct and is horizontally blown to the heating chamber, and returns to the circulating fan after uniformly heating the aluminum material. The air flows between the zones separately without affecting each other, and each zone can be divided into several layers of air discharge according to the material stacking height. The wind resistance coefficient is small and the circulation effect is good. The furnace temperature of the present application is uniform and the quality of the aluminum material heat treatment is uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of the air-guiding homogenizing furnace of this application.

[0014] Figure 2 for Figure 1 Side view of.

[0015] Figure 3 for Figure 1 Top view of the . DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings and a preferred implementation manner.

[0017] See also Figure 1-Figure 3 The present embodiment provides a partitioned and layered air-guiding homogenizing furnace, comprising a furnace body 10 and a furnace door 20. The furnace body is divided into a heating chamber 101 and an air duct 102 by a first partition 11. The heating chamber 101 is arranged in the middle of the furnace, and the air duct 102 surrounds the upper side and the left and right sides of the heating chamber 101. The left air duct is evenly divided into four air zones by three second partitions 12. A circulating fan 50 is arranged in each air zone. Eight combustion nozzles 40 are evenly distributed in the upper air duct, and two combustion nozzles correspond to one air supply zone. An air guide device is arranged in the right air duct. The inlet of the circulating fan 50 is connected to the heating chamber 101, and the outlet is connected to the circulating air duct 102. The right side of the heating chamber is connected to the right air duct through the air guide device. The air guide device divides the circulating fan outlet air entering the right air duct into 4 zones and 4 layers and blows them horizontally to the heating chamber.

[0018] In this embodiment, the furnace body 10 is rectangular, and its length direction extends from left to right; the furnace door 20 is arranged on the left side of the furnace body 10, and is driven by a chain mechanism driven by a motor 21 to drive its lifting movement to close or open the furnace chamber to realize material loading and unloading.

[0019] The first partition 11 is an inverted U-shaped structure, fixed in the furnace by a support rod, with its rear end connected to the rear wall of the furnace, its front end connected to the front wall of the furnace, and its lower end connected to the bottom wall of the furnace. A through hole is provided in the middle of the first partition 11 on the left side, and the air outlet of the circulating fan 50 is provided in the through hole; the first partition on the right side is only closed at the lower end, and the middle part and the upper part are connected to the air guide device.

[0020] The bottom of the heating chamber 101 is provided with a track 70 and a support 60, the track 70 is used for the feeding and unloading machine to travel, and the support 60 is used to support the material tray and the homogenized material. The left and right sides of the heating chamber are also provided with temperature measuring resistors 41, which are used to measure the outlet air temperature and the inlet air temperature respectively.

[0021] The air guide device includes an air duct partition plate 34, an air duct air inlet frame 31, an air guide plate 33 and an air duct air outlet frame 32; the air duct partition plate 34 is a flat plate with the same plate surface size as the cross-sectional size of the right air duct. In the present embodiment, there are three plates in total, which correspond to the second partition plate 12 one by one, and divide the right air duct into four air supply areas. The air duct air inlet frame 31 is a horizontal frame, and the air duct air outlet frame 32 is a vertical frame. The left end of the air duct air inlet frame 31 is connected to the right end of the air duct air outlet frame 32, the right end of the air duct air inlet frame 31 is connected to the right side wall of the furnace, and the lower end of the air duct air outlet frame 32 is connected to the first partition plate on the right side. The air duct air inlet frame 31 divides the right air duct inlet into four air inlets, and the air duct air outlet frame 32 divides the right air duct inlet into four air outlets. One air inlet and one air outlet correspond to one air supply area. For the convenience of expression, the air inlet, air outlet and air supply area close to the heating chamber are set as the first air inlet, the first air outlet and the first air supply area respectively.

[0022] The air duct air inlet frame 31 and the air duct air outlet frame 32 can be manufactured in one piece, or can be manufactured separately and then welded.

[0023] Four air guide plates 33 are installed at equal intervals in each air supply area. The air guide plates include a vertical plate portion, a horizontal plate portion and an arc plate portion, and the vertical plate portion and the horizontal plate portion are connected by the arc plate portion. The upper end of the vertical plate portion of the first air guide plate is connected to the air duct air inlet frame 31 and is located between the first air inlet and the second air inlet, and the lower end of the vertical plate portion is connected to the air duct air outlet frame 3 and is located between the first air inlet and the first air outlet. The space enclosed by the first air guide plate forms the first air supply area, that is, the first air guide plate is the common side wall of the first air supply area and the second air supply area. The second air guide plate is installed below and to the right of the first air guide plate, and the space enclosed by the first air guide plate forms a second air supply area. The third air guide plate is installed below and to the right of the second air guide plate, and the space enclosed by the second air guide plate forms a third air supply area. The fourth air guide plate is installed below and to the right of the third air guide plate, and the space enclosed by the third air guide plate forms a fourth air supply area. In this embodiment, the vertical plate portion of the fourth air guide plate is the right side wall of the furnace, that is, the fourth air guide plate only includes a horizontal plate portion and an arc-shaped plate portion.

[0024] Preferably, the horizontal height of the fourth air guide plate is approximately equal to the height of the bottom surface of the steel supporting the homogenous material 100, so that the hot air can flow horizontally through the homogenous material in a concentrated manner to improve the heating efficiency.

[0025] In order to improve the structural stability of the air guide plate, the horizontal frame of the air duct inlet frame 31 is preferably provided with horizontal reinforcing ribs 311, two horizontal reinforcing ribs 311 are provided in each air inlet, and the upper end of the air guide plate is connected to the horizontal reinforcing ribs 311. The vertical frame of the air duct outlet frame 32 is preferably provided with vertical reinforcing ribs 321, two vertical reinforcing ribs 321 are provided in each air outlet, and the lower end of the air guide plate is connected to the vertical reinforcing ribs 321.

[0026] When the utility model is used, the air from the circulating fan 50 enters the upper air duct through the left air duct, is heated by the combustion nozzle 10 in the upper air duct, and then enters the right air duct. In the right air duct, the air is divided into 4 zones and 4 layers by the air guide device and blown horizontally toward the homogeneous material 100 in the heating chamber, and then returns to the circulating fan 50 after uniformly heating the homogeneous material 100.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention, and these improvements and modifications are also within the protection scope of the present invention.

Claims

1. A zoned and layered air-guiding homogenizing furnace, comprising a furnace body and a furnace door, characterized in that: The furnace body is divided into a heating chamber and an air duct by a first partition. The heating chamber is arranged in the middle part of the furnace. The air duct surrounds the upper side and the left and right sides of the heating chamber. The left air duct is divided into several air zones by a second partition. A circulating fan is arranged in each air zone. Several heating elements are arranged in the upper air duct. An air guide device is arranged in the right air duct. The inlet of the circulating fan is connected with the heating chamber, and the outlet is connected with the circulating air duct. The heating chamber is connected with the right air duct through the air guide device. The air guide device is used to divide the circulating fan outlet air entering the right air duct into N zones and M layers and blow it horizontally to the heating chamber. The number of N zones is consistent with that of the circulating fan, and M is a natural number greater than 2.

2. A zoned and layered air-guiding homogenizing furnace according to claim 1, characterized in that: The air guiding device includes an air duct partition plate, an air duct air inlet frame, an air guide plate and an air duct air outlet frame; the air duct partition plate divides the right air duct into N air supply areas, namely N areas, and one air supply area corresponds to one circulation fan; the air duct air inlet frame is horizontally arranged at the inlet of the right air duct, dividing the right air duct inlet into N air inlets; the air duct air outlet frame is vertically arranged between the heating chamber and the right air duct, dividing the right air duct outlet into N air outlets; one air supply area corresponds to one air inlet and one air outlet, and each air supply area is installed with a plurality of parallel air guide plates, the upper end of the air guide plate is connected to the air inlet, and the lower end is connected to the air outlet, so that each air supply area is divided into M layers of air supply units.

3. A zoned and layered air-guiding homogenizing furnace according to claim 2, characterized in that: The air inlet frame of the air duct is made of steel sections, and includes a horizontal fixed frame connecting the two ends of the air guide plate and a horizontal reinforcing rib connecting the middle part of the air guide plate.

4. The zoned and layered air-guiding homogenizing furnace according to claim 2, characterized in that: The air outlet frame of the air duct is made of steel sections, and includes a vertical fixing frame connecting the two ends of the air guide plate and a vertical reinforcing rib connecting the middle part of the air guide plate.

5. The zoned and layered air-guiding homogenizing furnace according to claim 2, characterized in that: The air guide plate includes a vertical plate portion connected to the air inlet and a horizontal plate portion connected to the air outlet, and the vertical plate portion and the horizontal plate portion are connected by an arc plate portion.

6. The zoned and layered air-guiding homogenizing furnace according to claim 2, characterized in that: The vertical plate portion of the last air guide plate is the right side wall of the furnace.

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