Air guide system of heating furnace

Abstract

The utility model discloses a heating furnace air guide system, which relates to the technical field of metal heat treatment and comprises a furnace body, a material frame is arranged in an inner cavity of the furnace body, a hot air guide channel is reserved between the inner wall of the furnace body and the material frame, a supporting device is arranged at the bottom of the material frame, and the material frame is fixedly connected with the inner wall of the furnace body through the supporting device. Through cooperative arrangement of the air inlet hole, the air conveying cover, the air guide hole, the circulating fan and other structures, after the circulating fan is started, air in the material frame can be pumped out through the air outlet hole, so that negative pressure is generated in the material frame, and air heated by the burner is sucked into the air conveying cover under the action of the negative pressure; finally, hot air is guided into the stacked aluminum materials through air guide holes formed in the two sides of the air conveying cover, the aluminum materials located inside and located on the outer side can be heated at the same time, and the situation that when an existing heating furnace needs to heat a large number of aluminum materials at the same time, the aluminum materials located in the middle cannot make contact with hot air due to blocking of the aluminum materials on the outer side is avoided as much as possible. And the problem that the aluminum material is heated unevenly is solved.

Description

Technical Field

[0001] The present application relates to the technical field of metal heat treatment, and in particular to an air guide system for a heating furnace. Background Art

[0002] Heating furnace is a heat treatment equipment used for reheating and homogenization of aluminum and aluminum alloy before hot rolling. It has the characteristics of large furnace capacity, short heating time and continuous operation.

[0003] The utility model patent with announcement number CN214458224U proposes an air guide system for an aluminum ingot push-type heating furnace, including a volute system arranged on the furnace top and a hot air guide system arranged in conjunction with the volute system; the hot air guide system includes a guide channel arranged between the furnace top and the furnace bottom and a nozzle plate arranged on the furnace bottom and connected to the guide channel.

[0004] The above-mentioned air guide system shortens the heating time of the aluminum ingot pusher heating furnace, and reduces the temperature difference of the aluminum ingot and the furnace temperature difference, so as to achieve a more uniform atmosphere in the furnace and improve the heat uniformity quality of aluminum and aluminum ingots. When the above-mentioned heating furnace needs to heat a large amount of aluminum materials at the same time, the aluminum materials need to be piled up inside the furnace cavity. The aluminum materials in the middle position cannot be exposed to the hot air due to the obstruction of the aluminum materials on the outside, resulting in uneven heating of the aluminum materials in the middle position. Utility Model Content

[0005] The utility model aims to solve or at least alleviate the problem that when a large amount of aluminum materials need to be heated simultaneously in an existing heating furnace, the aluminum materials in the middle are blocked by the outer aluminum materials and cannot contact the hot air, resulting in uneven heating of the aluminum materials.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A heating furnace air guide system comprises a furnace body, a material frame is provided in the furnace body cavity, a hot air guide channel is left between the furnace body inner wall and the material frame, a supporting device is provided at the bottom of the material frame, the material frame is fixedly connected to the furnace body inner wall through the supporting device, an air guide structure is provided in the material frame inner cavity, the air guide structure comprises a plurality of air inlet holes opened on the bottom wall of the material frame inner cavity, an air hood is provided above each of the air inlet holes, the air hood is fixedly connected to the inner wall of the material frame, the air inlet holes are connected with the inner cavity of the air hood, air guide holes connected with the inner cavity of the air hood are provided on both sides of the air hood, an air outlet is provided on the top of the material frame, a circulation device is provided above the air outlet, heating devices are installed in the furnace body cavity on both sides of the circulation device, and a temperature regulating device is installed inside the hot air guide channel.

[0008] By adopting the above technical scheme, when using, the user first places the aluminum material that needs to be heat treated inside the material frame on both sides of the air hood, and then opens the burner to heat the air inside the furnace body, and starts the circulating fan at the same time. When the circulating fan is started, the circulating fan can extract the air inside the material frame and spray it to the burner for heating. At this time, a negative pressure is formed inside the material frame. Under the action of the negative pressure, the heated hot air is sucked into the inner cavity of the air hood through the air inlet hole, and finally the hot air is introduced into the stacked aluminum material through the air guide holes opened on both sides of the air hood, so that the aluminum materials located inside and outside can be heated at the same time, and the problem of uneven heating of the aluminum material is avoided as much as possible when the existing heating furnace needs to heat a large amount of aluminum materials at the same time, and the aluminum materials located in the middle position cannot be exposed to the hot air.

[0009] Optionally, the furnace body is in a rectangular box-shaped structure, and a heat-insulating layer is fixedly connected to the inner wall of the furnace body.

[0010] By adopting the above technical solution, a heat-insulating layer is provided on the inner wall of the furnace body for heat preservation, so as to avoid the heat loss inside the furnace body as much as possible, thereby saving energy.

[0011] Optionally, the supporting device includes a supporting plate arranged at the bottom of the material frame, the top of the supporting plate is welded to the material frame, and a ventilation hole for air circulation is opened in the center of the supporting plate.

[0012] By adopting the above technical solution, two symmetrically arranged support plates are provided to support the material frame from the bottom, so that air can enter into the inner cavity of the air delivery hood through the air inlet hole.

[0013] Optionally, the side walls on both sides of the gas delivery hood are recessed in the inner cavity of the gas delivery hood to form a plurality of grooves, and the air guide holes are opened on the inner walls of the grooves.

[0014] By adopting the above technical solution, multiple grooves are arranged on both sides of the gas conveying hood, and the air guide holes are opened on the inner walls of the grooves, which can avoid the aluminum materials stacked inside the material frame from clogging the air guide holes.

[0015] Optionally, the circulation device includes two circulation fans arranged in the inner cavity of the furnace body, the two circulation fans are installed directly above the air outlet, and the air intake end of the circulation fan is connected to the inner cavity of the material frame through the air outlet.

[0016] By adopting the above technical solution, when the circulating fan is started, the circulating fan can draw out the air inside the material frame, so that a negative pressure effect is formed inside the material frame, and the hot air heated by the heating device is sucked into the inner cavity of the air hood from the air inlet hole through the negative pressure effect, and finally the hot air is introduced into the stacked aluminum materials through the air guide holes opened on both sides of the air hood to heat the aluminum materials inside.

[0017] Optionally, the heating device is two burners arranged on the inner wall of the furnace body, and the two burners are respectively located on the outside of the exhaust ends of the two circulating fans.

[0018] By adopting the above technical solution, when in use, the burner is started to spray flames to heat the air inside the furnace body, and the heated air is transported to the inside of the stacked aluminum materials through the air supply hood to heat treat the aluminum materials.

[0019] Optionally, there are multiple gas delivery hoods, and the multiple gas delivery hoods are vertically installed along the inner cavity of the furnace body.

[0020] By adopting the above technical solution, multiple air hoods are set up to divide the material frame into multiple areas, so as to avoid the problem of too much aluminum material in one area, which leads to the inability to heat the aluminum material uniformly.

[0021] Optionally, the temperature regulating device includes a ventilation duct installed in the hot air guide channel on both sides of the material frame, a plurality of turns of heating wires connected in parallel in the circuit are installed in the inner cavity of the ventilation duct, a circuit breaker is fixedly connected to the outer wall of the furnace body, the plurality of turns of the heating wires are electrically connected to the circuit breaker, and a temperature sensor is installed in the hot air guide channel below the ventilation duct.

[0022] By adopting the above technical solution, the model of the temperature sensor is LTM8877, which is used to detect the air temperature inside the hot air guide channel. When the temperature sensor detects that the temperature inside the hot air guide channel does not meet the standard, the user can energize the heating wire through the circuit breaker to perform secondary heating on the air passing through the ventilation duct, and the heating temperature can be controlled by controlling the number of turns of the heating wire connected to the circuit, which is convenient for users to use.

[0023] In summary, the beneficial effects of this application are as follows:

[0024] 1. The present application adopts the coordinated arrangement of structures such as air inlet holes, air hoods, air guide holes and circulating fans. After the circulating fan is started, the air inside the material frame can be extracted through the air outlet holes, so that negative pressure is generated inside the material frame, and the air heated by the burner is sucked into the air hood under the action of the negative pressure, and finally the hot air is introduced into the stacked aluminum materials through the air guide holes opened on both sides of the air hood, so that the aluminum materials located inside and outside can be heated at the same time, and the problem of uneven heating of the aluminum materials caused by the obstruction of the aluminum materials outside when the existing heating furnace needs to heat a large amount of aluminum materials at the same time is avoided as much as possible.

[0025] 2. An insulation layer is set inside the furnace body, and two sets of circulating fans are set to drive the air circulation inside the furnace body to heat the aluminum material, which greatly improves the utilization rate of thermal energy and avoids the loss of heat energy inside the furnace body as much as possible, causing energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall cross-sectional structure of this application;

[0027] Figure 2 It is a three-dimensional structural schematic diagram of the gas delivery hood of the present application;

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of the support plate of the present application.

[0029] Explanation of the accompanying reference numerals: 1. furnace body; 2. insulation layer; 3. material frame; 4. support plate; 5. ventilation hole; 6. air inlet hole; 7. air supply hood; 8. groove; 9. air guide hole; 10. air outlet hole; 11. circulation fan; 12. burner; 13. ventilation pipe; 14. heating wire; 15. circuit breaker; 16. temperature sensor. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-3 This application is described in further detail.

[0031] See also Figure 1-3 A heating furnace air guide system includes a furnace body 1 for heat treating aluminum materials. A material frame 3 is provided in the inner cavity of the furnace body 1. The material frame 3 is provided for stacking aluminum materials and supporting the aluminum materials from the outside to avoid collapse of the aluminum materials during the stacking process.

[0032] A hot air guide channel for air circulation is provided between the inner wall of the furnace body 1 and the material frame 3. A supporting device is provided at the bottom of the material frame 3, and the material frame 3 is fixedly connected to the inner wall of the furnace body 1 through the supporting device, so that the material frame 3 is installed inside the furnace body 1.

[0033] An air guide structure is provided in the inner cavity of the material frame 3, and the air guide structure includes a plurality of air inlet holes 6 opened on the bottom wall of the inner cavity of the material frame 3, and a hollow air hood 7 is provided above each air inlet hole 6, and the air hood 7 is fixedly connected to the inner wall of the material frame 3, and the air inlet holes 6 are communicated with the inner cavity of the air hood 7, so that air can enter the inside of the air hood 7 through the air inlet holes 6.

[0034] Air guide holes 9 communicating with the inner cavity of the air conveying hood 7 are provided on both sides of the air conveying hood 7 . The air guide holes 9 are provided to discharge high-temperature air to heat the aluminum material at the center of the material frame 3 .

[0035] An air outlet 10 is provided on the top of the material frame 3, and a circulation device is provided above the air outlet 10. The air circulates in the inner cavity of the furnace body 1 through the circulation device, thereby greatly improving the utilization efficiency of heat energy.

[0036] A heating device for heating the air is installed in the inner cavity of the furnace body 1 on both sides of the circulation device, and a temperature regulating device for regulating the heating temperature is installed inside the hot air guide channel.

[0037] Reference Figure 1 The furnace body 1 is a rectangular box-shaped structure, and a heat-insulating layer 2 is fixedly connected to the inner wall of the furnace body 1. The heat-insulating layer 2 is arranged on the inner wall of the furnace body 1 for heat preservation, so as to avoid the heat loss inside the furnace body 1 as much as possible, and save energy.

[0038] Reference Figure 1 and Figure 3 The supporting device includes a supporting plate 4 arranged at the bottom of the material frame 3, the top of the supporting plate 4 is welded to the material frame 3, and a ventilation hole 5 for air circulation is opened in the center of the supporting plate 4. Two symmetrically arranged supporting plates 4 are arranged to support the material frame 3 from the bottom, so that air can enter the inner cavity of the air delivery hood 7 through the air inlet hole 6.

[0039] Reference Figure 2 The side walls of the gas hood 7 are concave to form multiple grooves 8, and the air guide holes 9 are opened on the inner walls of the grooves 8. Multiple grooves 8 are set on both sides of the gas hood 7, and the air guide holes 9 are opened on the inner walls of the grooves 8, which can avoid the aluminum materials stacked inside the material frame 3 from blocking the air guide holes 9.

[0040] Reference Figure 3 The circulation device includes two circulation fans 11 arranged in the inner cavity of the furnace body 1. Both circulation fans 11 are installed directly above the air outlet 10. The air suction end of the circulation fan 11 is connected with the inner cavity of the material frame 3 through the air outlet 10. When the circulation fan 11 is started, the circulation fan 11 can extract the air inside the material frame 3, so that a negative pressure effect is formed inside the material frame 3, and the hot air heated by the heating device is sucked into the inner cavity of the air conveying hood 7 from the air inlet 6 through the negative pressure effect, and finally the hot air is introduced into the stacked aluminum materials through the air guide holes 9 opened on both sides of the air conveying hood 7 to heat the aluminum materials inside.

[0041] Reference Figure 1 The heating device is two burners 12 arranged on the inner wall of the furnace body 1, and the two burners 12 are respectively located outside the exhaust ends of the two circulating fans 11. When in use, the burners 12 are started to spray flames to heat the air inside the furnace body 1, and the heated air is transported to the inside of the stacked aluminum materials through the air supply hood 7 to heat the aluminum materials.

[0042] Reference Figure 1 There are multiple gas hoods 7, and multiple gas hoods 7 are vertically installed along the inner cavity of the furnace body 1. Multiple gas hoods 7 are provided to separate the material frame 3 into multiple areas, so as to avoid the problem that too many aluminum materials in one area cannot be uniformly heated.

[0043] Reference Figure 1 The temperature regulating device includes a ventilation pipe 13 installed in the hot air guide channel on both sides of the material frame 3, and a plurality of turns of electric heating wire 14 connected in parallel in the circuit are installed in the inner cavity of the ventilation pipe 13. A circuit breaker 15 is fixedly connected to the outer wall of the furnace body 1, and the plurality of turns of electric heating wire 14 are electrically connected to the circuit breaker 15. A temperature sensor 16 is installed in the hot air guide channel below the ventilation pipe 13. The model of the temperature sensor 16 is LTM8877, which is used to detect the air temperature inside the hot air guide channel. When the temperature sensor 16 detects that the temperature inside the hot air guide channel does not meet the standard, the user can energize the electric heating wire 14 through the circuit breaker 15 to perform secondary heating on the air passing through the ventilation pipe 13, and the heating temperature can be controlled by controlling the number of turns of the electric heating wire 14 connected to the circuit, which is convenient for users to use.

[0044] The implementation principle of the present application is as follows: when in use, the user first places the aluminum material that needs to be heat treated inside the material frame 3 on both sides of the air hood 7, then opens the burner 12 to heat the air inside the furnace body 1, and starts the circulation fan 11 at the same time. When the circulation fan 11 is started, the circulation fan 11 can extract the air inside the material frame 3 and spray it to the burner 12 for heating. At this time, a negative pressure is formed inside the material frame 3. Under the action of the negative pressure, the heated hot air is sucked into the inner cavity of the air hood 7 through the air inlet hole 6, and finally the hot air is introduced into the stacked aluminum material through the air guide holes 9 opened on both sides of the air hood 7, so that the aluminum materials located inside and outside can be heated at the same time, and the problem of uneven heating of the aluminum material is avoided as much as possible. When the existing heating furnace needs to heat a large amount of aluminum materials at the same time, it is blocked by the aluminum materials on the outside, and the aluminum materials in the middle position cannot contact the hot air.

[0045] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A heating furnace air guide system, comprising a furnace body (1), a material frame (3) being arranged in an inner cavity of the furnace body (1), a hot air guide channel being reserved between an inner wall of the furnace body (1) and the material frame (3), a supporting device being arranged at the bottom of the material frame (3), the material frame (3) being fixedly connected to the inner wall of the furnace body (1) via the supporting device, an air guide structure being arranged in the inner cavity of the material frame (3), characterized in that: The air guide structure comprises a plurality of air inlet holes (6) formed on the bottom wall of the inner cavity of the material frame (3); an air supply hood (7) is provided above each of the air inlet holes (6); the air supply hood (7) is fixedly connected to the inner wall of the material frame (3); the air inlet holes (6) are communicated with the inner cavity of the air supply hood (7); air guide holes (9) communicated with the inner cavity of the air supply hood (7) are provided on both sides of the air supply hood (7); an air outlet hole (10) is formed on the top of the material frame (3); a circulation device is provided above the air outlet hole (10); heating devices are installed in the inner cavity of the furnace body (1) on both sides of the circulation device; and a temperature regulating device is installed inside the hot air guide channel.

2. The air guide system for a heating furnace according to claim 1, characterized in that: The furnace body (1) is in a rectangular box-shaped structure, and a heat-insulating layer (2) is fixedly connected to the inner wall of the furnace body (1).

3. The air guide system for a heating furnace according to claim 1, characterized in that: The support device comprises a support plate (4) arranged at the bottom of the material frame (3), the top of the support plate (4) is welded to the material frame (3), and a ventilation hole (5) for air circulation is provided in the center of the support plate (4).

4. The air guide system for a heating furnace according to claim 1, characterized in that: The side walls of the gas delivery hood (7) on both sides are concave to form a plurality of grooves (8) in the inner cavity of the gas delivery hood (7), and the gas guide holes (9) are provided on the inner walls of the grooves (8).

5. The air guide system for a heating furnace according to claim 1, characterized in that: The circulation device comprises two circulation fans (11) arranged in the inner cavity of the furnace body (1), the two circulation fans (11) are installed directly above the air outlet hole (10), and the air intake end of the circulation fan (11) is connected to the inner cavity of the material frame (3) through the air outlet hole (10).

6. The air guide system for a heating furnace according to claim 5, characterized in that: The heating device is two burners (12) arranged on the inner wall of the furnace body (1), and the two burners (12) are respectively located outside the exhaust ends of the two circulating fans (11).

7. The air guide system for a heating furnace according to claim 1, characterized in that: There are a plurality of gas delivery hoods (7), and the plurality of gas delivery hoods (7) are vertically installed along the inner cavity of the furnace body (1).

8. The air guide system for a heating furnace according to claim 1, characterized in that: The temperature regulating device comprises a ventilation pipe (13) installed in the hot air guide channel on both sides of the material frame (3), a plurality of turns of electric heating wire (14) connected in parallel in the circuit are installed in the inner cavity of the ventilation pipe (13), a circuit breaker (15) is fixedly connected to the outer wall of the furnace body (1), and the plurality of turns of the electric heating wire (14) are electrically connected to the circuit breaker (15), and a temperature sensor (16) is installed in the hot air guide channel below the ventilation pipe (13).

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