Thermal cycle structure in bar uniform-temperature furnace

Abstract

The utility model discloses a heat circulation structure in a bar temperature equalizing furnace. The heat circulation structure comprises a hot air circulation cavity arranged in a furnace body, the hot air circulation cavity comprises a heating air return cavity and double-side air outlet cavities which are communicated with each other, bars are located between the double-side air outlet cavities, and the bars in the hot air circulation cavity are continuously heated by blowing hot air; a circulating fan unit is installed above the heating air return cavity, the air inlet end of the circulating fan unit is communicated with the heating air return cavity, the air outlet end of the circulating fan unit is communicated with the double-side air outlet cavity through an air duct, and hot air circularly flows between the heating air return cavity and the double-side air outlet cavity under the action of the circulating fan unit. Compared with direct heating of a traditional induction heating furnace or a fuel gas heating furnace, the heat circulation structure in the bar temperature equalizing furnace adopts a hot air circulation mode to preserve heat of an aluminum bar, the heating uniformity is better, hot air can be uniformly guided to all positions of the aluminum bar from head to tail through the design of the air equalizing pipe and the multiple air nozzles, and the energy consumption is reduced. Therefore, the phenomena that the head is overheated and the tail is not burnt thoroughly in the length direction of the aluminum bar are avoided.

Description

Technical Field

[0001] This utility model relates to the field of uniform temperature furnace structure technology, and in particular to a heat circulation structure in a bar stock uniform temperature furnace. Background Technology

[0002] Aluminum bars require heat treatment before extrusion molding to ensure their plasticity, reduce deformation resistance, and eliminate structural defects. In traditional processes, aluminum bars are typically heated directly using induction heating furnaces or gas heating furnaces. The rapid heating of induction heating or gas furnaces can easily cause a large temperature difference between the surface and core of the aluminum bar (up to 50-100℃), and along the length direction, there is overheating at the head and underheating at the tail, leading to problems such as cracks and dimensional deviations during extrusion.

[0003] Therefore, such equipment has problems such as poor temperature uniformity, high energy consumption, and large heat loss. Especially when processing high-strength aluminum alloys, it is easy to cause defects such as coarse grains and uneven mechanical properties due to temperature differences, which affects the quality of finished products. Utility Model Content

[0004] The purpose of this invention is to provide a heat circulation structure in a bar heating furnace to solve the problems of large temperature difference between the bar surface and core, overheating at the head, and underheating at the tail in traditional aluminum bar heating equipment.

[0005] To solve the above-mentioned technical problems, this utility model provides a heat circulation structure in a bar stock homogenizing furnace, including a hot air circulation cavity disposed inside the furnace body;

[0006] The hot air circulation chamber includes a connected heating return air chamber and two side air outlet chambers. The bar stock is located between the two side air outlet chambers and is continuously heated by blowing hot air.

[0007] A circulating fan unit is installed above the heating return air chamber. The air inlet of the circulating fan unit is connected to the heating return air chamber, and the air outlet is connected to the double-sided air outlet chamber through the air duct. Under the action of the circulating fan unit, hot air circulates between the heating return air chamber and the double-sided air outlet chamber.

[0008] A burner is provided on one side of the heating return air chamber, which heats the circulating hot air in the heating return air chamber.

[0009] Preferably, the dual-sided air outlet includes air distribution pipes symmetrically arranged on both sides of the bar stock. The air distribution pipes extend along the length of the bar stock, and multiple air nozzles are spaced apart on the side of the air distribution pipes closest to the bar stock, through which hot air is sprayed toward both sides of the bar stock.

[0010] Preferably, the air outlets of the nozzles are all arc-shaped, corresponding to the arc-shaped outer surface of the bar stock.

[0011] Preferably, the circulating fan unit includes a drive motor and an axial fan. The air inlet of the axial fan is connected to the heating return air chamber, and the air outlet introduces hot air into the equalization pipes on both sides of the double-sided air outlet chamber through a three-way pipe.

[0012] Preferably, the burner includes a combustion gun, which is connected to a fuel pipe and a combustion fan. Under the action of the combustion fan, the fuel transported by the fuel pipe is ignited and continuously burned to heat the circulating hot air in the heating return air chamber.

[0013] Preferably, the portion of the combustion gun located within the heating return air chamber is equipped with a combustion protection tube.

[0014] Preferably, a temperature probe is also provided on one side of the combustion protection tube to detect the temperature of the heating return air chamber.

[0015] Preferably, the dual-sided air outlet cavity is provided with an air volume control mechanism, which includes a drive piston cylinder, a synchronizing rod, two sets of crank connecting rods and two air volume adjustment plates;

[0016] The drive piston cylinder drives the synchronizing rod to rotate by rotating the connecting rod and one end of the synchronizing rod;

[0017] The two sets of crank connecting rods are respectively connected to both ends of the synchronizing rod and move synchronously with the synchronizing rod;

[0018] The two air volume regulating plates are respectively connected to the crank connecting rod and are located in the air distribution pipes on both sides of the double air outlet chamber. The air volume of the front and rear sections of the air distribution pipes can be adjusted by rotating the air volume regulating plates.

[0019] Preferably, the dual-sided air outlet cavity is further provided with at least one set of temperature measuring mechanism, which includes a telescopic temperature measuring tube, in which a thermocouple is provided. The thermocouple extends into the dual-sided air outlet cavity along with the telescopic temperature measuring tube, passes through the air distribution pipe and contacts the bar material, and measures its temperature.

[0020] Preferably, the telescopic temperature measuring tube is equipped with a cylinder at its tail end, and the telescopic temperature measuring tube and the thermocouple are pushed by the cylinder to move toward the bar material;

[0021] The thermocouples are provided in two sets, installed side by side inside the telescopic temperature measuring tube, and the wires at their tails convert the temperature measurement signal into an electrical signal output.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] 1. The thermal circulation structure in this bar heating furnace uses circulating hot air to keep the aluminum bars warm. Compared with the direct heating of traditional induction heating furnaces or gas heating furnaces, the heating uniformity is better. Moreover, through the design of the air distribution pipe and multiple air nozzles, the hot air can be evenly guided to all positions of the aluminum bar from beginning to end, thereby solving the problem of overheating at the head and underheating at the tail in the length direction of the aluminum bar.

[0024] 2. The thermal circulation structure in the bar uniform temperature furnace adjusts the hot air volume of the front and rear sections of the uniform air duct through the air volume control mechanism, which can adjust the insulation temperature of the front and rear sections of the aluminum bar. This allows for different insulation temperatures of the front and rear sections of the same aluminum bar or different insulation temperatures of multiple aluminum bars in the uniform temperature furnace, thereby minimizing heat loss and energy consumption. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a homogenizing furnace using the heat circulation structure provided by this utility model;

[0026] Figure 2 This is a schematic diagram of the thermal cycle structure provided by this utility model;

[0027] Figure 3 This is a schematic diagram of the internal structure of the thermal cycle structure provided by this utility model;

[0028] Figure 4 This is a schematic diagram of the burner provided by this utility model;

[0029] Figure 5 This is a schematic diagram showing the connection between the air distribution duct and the air volume control mechanism provided by this utility model;

[0030] Figure 6 This is a schematic diagram of the air volume control mechanism provided by this utility model;

[0031] Figure 7 This is a schematic diagram of the temperature measuring mechanism provided by this utility model;

[0032] Figure 8 This is a cross-sectional view of the temperature measuring mechanism provided by this utility model.

[0033] In the diagram: 100, bar stock; 1, furnace body; 2, heating return air chamber; 3, double-sided air outlet chamber; 301, air distribution duct; 302, air nozzle; 4, circulating fan unit; 401, drive motor; 402, axial flow fan; 5, burner; 501, combustion gun; 502, fuel pipe; 503, combustion fan; 504, combustion protection pipe; 505, temperature probe; 6, tee pipe; 7, air volume control mechanism; 701, drive piston cylinder; 702, synchronizing rod; 703, crank connecting rod; 704, air volume regulating plate; 8, temperature measuring mechanism; 801, telescopic temperature measuring tube; 802, thermocouple; 803, cylinder. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship 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.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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. Example

[0037] This utility model provides a heat circulation structure in a bar stock homogenizing furnace. Please refer to [link / reference]. Figure 1 and Figure 2 The furnace includes a hot air circulation chamber disposed within the furnace body 1; the hot air circulation chamber includes a connected heating return air chamber 2 and a double-sided air outlet chamber 3, with the bar stock 100 located between the double-sided air outlet chambers 3, and the bar stock 100 is continuously heated by blowing hot air; a circulating fan unit 4 is installed above the heating return air chamber 2, the air inlet of the circulating fan unit 4 is connected to the heating return air chamber 2, and the air outlet is connected to the double-sided air outlet chamber 3 through an air duct, and the hot air circulates between the heating return air chamber 2 and the double-sided air outlet chamber 3 under the action of the circulating fan unit 4; a burner 5 is provided on one side of the heating return air chamber 2, and the circulating hot air in the heating return air chamber 2 is heated by the burner 5.

[0038] Specifically, such as Figure 3As shown, the dual-sided air outlet 3 includes air distribution pipes 301 symmetrically arranged on both sides of the bar stock 100. The air distribution pipes 301 extend along the length direction of the bar stock 100, and multiple air nozzles 302 are spaced apart on the side of the air distribution pipes 301 near the bar stock 100, through which hot air is sprayed toward both sides of the bar stock 100.

[0039] In this embodiment, the air outlets of the nozzles 302 are all arc-shaped, corresponding to the arc-shaped outer surface of the bar stock 100.

[0040] Furthermore, the circulating fan unit 4 includes a drive motor 401 and an axial fan 402. The air inlet of the axial fan 402 is connected to the heating return air chamber 2, and the air outlet introduces hot air into the air distribution pipes 301 on both sides of the double-sided air outlet chamber 3 through a three-way pipe 6.

[0041] Specifically, such as Figure 4 As shown, the burner 5 includes a combustion gun 501, which is connected to a fuel pipe 502 and a combustion fan 503. Under the action of the combustion fan 503, the fuel transported by the fuel pipe 502 is ignited and continuously burned to heat the circulating hot air in the heating return air chamber 2.

[0042] Furthermore, the portion of the combustion gun 501 located within the heating return air chamber 2 is equipped with a combustion protection pipe 504.

[0043] Furthermore, a temperature probe 505 is provided on one side of the combustion protection tube 504 to detect the temperature of the heating return air cavity 2.

[0044] Specifically, such as Figure 5 and Figure 6 As shown, the dual-sided air outlet cavity 3 is equipped with an air volume control mechanism 7, which includes a drive piston cylinder 701, a synchronizing rod 702, two sets of crank connecting rods 703, and two air volume adjustment plates 704. The drive piston cylinder 701 drives the synchronizing rod 702 to rotate by rotating the connecting rod and one end of the synchronizing rod 702. The two sets of crank connecting rods 703 are respectively connected to the two ends of the synchronizing rod 702 and move synchronously with the synchronizing rod 702. The two air volume adjustment plates 704 are respectively connected to the crank connecting rods 703 and are located in the air distribution pipes 301 on both sides of the dual-sided air outlet cavity 3. The air volume of the front and rear sections of the air distribution pipes 301 is adjusted by rotating the air volume adjustment plates 704.

[0045] Specifically, such as Figure 7 and Figure 8As shown, the double-sided air outlet cavity 3 is also provided with at least one set of temperature measuring mechanism 8, which includes a telescopic temperature measuring tube 801. A thermocouple 802 is provided in the telescopic temperature measuring tube 801. The thermocouple 802 extends into the double-sided air outlet cavity 3 along with the telescopic temperature measuring tube 801, passes through the air distribution pipe 301 and contacts the bar material 100, and measures its temperature.

[0046] Furthermore, the telescopic temperature measuring tube 801 is equipped with a cylinder 803 at its tail end, which pushes the telescopic temperature measuring tube 801 and the thermocouple 802 toward the bar stock 100.

[0047] In this embodiment, two sets of thermocouples 802 are installed side by side inside the telescopic temperature measuring tube 801, and the wires at their tails convert the temperature measurement signal into an electrical signal output.

[0048] The thermal circulation structure in this bar heating furnace uses circulating hot air to keep the aluminum bars warm. Compared with the direct heating of traditional induction heating furnaces or gas heating furnaces, the heating uniformity is better. Furthermore, through the design of the air distribution pipe and multiple air nozzles, the hot air can be evenly guided to all positions of the aluminum bar from beginning to end, thereby solving the problem of overheating at the head and underheating at the tail along the length of the aluminum bar.

[0049] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A heat circulation structure in a bar stock homogenizing furnace, characterized in that, Includes a hot air circulation chamber disposed within the furnace body (1); The hot air circulation chamber includes a connected heating return air chamber (2) and a double-sided air outlet chamber (3). The bar stock (100) is located between the double-sided air outlet chambers (3) and is continuously heated by blowing hot air. A circulating fan unit (4) is installed above the heating return air chamber (2). The air inlet of the circulating fan unit (4) is connected to the heating return air chamber (2), and the air outlet is connected to the double-sided air outlet chamber (3) through the air duct. Under the action of the circulating fan unit (4), hot air circulates between the heating return air chamber (2) and the double-sided air outlet chamber (3). A burner (5) is provided on one side of the heating return air chamber (2), and the circulating hot air in the heating return air chamber (2) is heated by the burner (5).

2. The heat circulation structure in a bar stock homogenizing furnace as described in claim 1, characterized in that, The dual-sided air outlet chamber (3) includes air distribution pipes (301) symmetrically arranged on both sides of the bar (100). The air distribution pipes (301) extend along the length direction of the bar (100), and multiple air nozzles (302) are spaced apart on the side of the air distribution pipes (301) closest to the bar (100) to blow hot air toward both sides of the bar (100).

3. The heat circulation structure in a bar stock homogenizing furnace as described in claim 2, characterized in that, The air outlets of the nozzles (302) are all arc-shaped, corresponding to the arc-shaped outer surface of the bar stock (100).

4. The heat circulation structure in a bar stock homogenizing furnace as described in claim 2, characterized in that, The circulating fan unit (4) includes a drive motor (401) and an axial fan (402). The air inlet of the axial fan (402) is connected to the heating return air chamber (2), and the air outlet introduces hot air into the air distribution pipes (301) on both sides of the double-sided air outlet chamber (3) through a three-way pipe (6).

5. The heat circulation structure in a bar stock homogenizing furnace as described in claim 1, characterized in that, The burner (5) includes a combustion gun (501), on which a fuel pipe (502) and a combustion fan (503) are connected respectively. Under the action of the combustion fan (503), the fuel transported by the fuel pipe (502) is ignited and continuously burned to heat the circulating hot air in the heating return air chamber (2).

6. The heat circulation structure in a bar stock homogenizing furnace as described in claim 5, characterized in that, The portion of the combustion gun (501) located within the heating return air chamber (2) is equipped with a combustion protection tube (504).

7. The heat circulation structure in a bar stock homogenizing furnace as described in claim 6, characterized in that, A temperature probe (505) is also provided on one side of the combustion protection tube (504) to detect the temperature of the heating return air cavity (2).

8. The heat circulation structure in a bar stock homogenizing furnace as described in claim 2, characterized in that, The dual-sided air outlet chamber (3) is equipped with an air volume control mechanism (7), which includes a drive piston cylinder (701), a synchronizing rod (702), two sets of crank connecting rods (703) and two air volume adjustment plates (704). The drive piston cylinder (701) drives the synchronous rod (702) to rotate by rotating the connecting rod and one end of the synchronous rod (702); The two sets of crank connecting rods (703) are respectively connected to both ends of the synchronizing rod (702) and move synchronously with the synchronizing rod (702); The two air volume regulating plates (704) are respectively connected to the crank connecting rod (703) and are located in the air distribution pipes (301) on both sides of the double-sided air outlet chamber (3). The air volume of the front and rear sections of the air distribution pipes (301) can be adjusted by rotating the air volume regulating plates (704).

9. The heat circulation structure in a bar stock homogenizing furnace as described in claim 2, characterized in that, The double-sided air outlet cavity (3) is also provided with at least one set of temperature measuring mechanism (8), which includes a telescopic temperature measuring tube (801). A thermocouple (802) is provided in the telescopic temperature measuring tube (801). The thermocouple extends into the double-sided air outlet cavity (3) along with the telescopic temperature measuring tube (801), passes through the air distribution pipe (301) and contacts the bar stock (100) to measure its temperature.

10. The heat circulation structure in a bar stock homogenizing furnace as described in claim 9, characterized in that, The telescopic temperature measuring tube (801) is equipped with a cylinder (803) at its tail end. The cylinder (803) pushes the telescopic temperature measuring tube (801) and the thermocouple (802) toward the bar stock (100). The thermocouple (802) is provided in two sets, which are installed side by side inside the telescopic temperature measuring tube (801), and the wire at its tail converts the temperature measuring signal into an electrical signal output.

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