Comprehensive annealing furnace for aluminum-based composite material

Abstract

The utility model relates to the technical field of annealing furnaces, in particular to a comprehensive annealing furnace for an aluminum-based composite material, which comprises a heat preservation box body, a feeding hole is formed in the front end of the tank body, and the tank body is arranged in the heat preservation box body; the sealing door is arranged at the feeding hole to open and close the feeding hole; a first ventilation opening and a second ventilation opening are formed in the two ends of the cover body respectively. According to the utility model, a traditional bell jar type annealing furnace and a traditional box type annealing furnace are mutually combined, the tank body and the cover body of the bell jar type annealing furnace are adjusted from a vertical state to a horizontal state and are put into the box type annealing furnace, namely the heat preservation box body, and the circulating fan is arranged at the rear end of the box type annealing furnace to promote air flow circulation in the tank body; the feeding mode adopts a platform trolley transverse feeding mode like a box-type annealing furnace, a coil turning device is not needed any more, and loading and unloading are convenient; the circulating fan blows air behind the cover body forwards, airflow circulation is achieved, air circulation is good, and the temperature difference in the furnace is small.

Description

Technical Field

[0001] This utility model relates to the field of annealing furnace technology, and in particular to a comprehensive annealing furnace for aluminum-based composite materials. Background Technology

[0002] Currently, annealing furnaces on the market are mainly divided into two categories: bell-type annealing furnaces and box-type annealing furnaces. Each of these two types of annealing furnaces has its own advantages and disadvantages, as detailed below:

[0003] First, let's talk about the advantages of the two. The advantage of the bell-type annealing furnace is its better sealing performance. When a vacuum is required, its structure can withstand a large vacuum without being damaged. The advantage of the box-type annealing furnace is that it is convenient to load and unload materials. When the coil is placed, its internal holes are horizontal. When loading, there is no need to use a turning device. It can be directly lifted onto the material platform with a hook and then sent into the furnace by a platform trolley. At the same time, the temperature difference inside the furnace is small. There is a circulating fan at the back of the furnace, which continuously draws the air inside the furnace from the back to the front to achieve air circulation. This ensures smooth airflow inside the furnace, and the temperature difference inside the furnace is only 3 degrees Celsius.

[0004] The following section will focus on the drawbacks of both:

[0005] The disadvantages of bell-type annealing furnaces include: 1. Inconvenient loading and unloading. When loading, the outer cover needs to be removed first, then the inner cover needs to be removed, the coil (workpiece) needs to be turned over (requiring a turning device), and then the coil is stacked vertically (at this time, the holes inside the coil are vertical), which is cumbersome; 2. Large temperature difference inside the furnace (mainly due to poor heat circulation). When the coil is placed inside the furnace, the fan is located at the bottom, facing the holes inside the coil. Although the holes are close together after the coils are stacked, there are still gaps, making it difficult to achieve a complete seal. During the airflow circulation, some airflow leaks from the gaps instead of continuing to flow through the holes, resulting in some heat loss. The airflow becomes weaker closer to the top (in practice, it has been found that the temperature difference between the top and bottom coils is about 50 degrees Celsius).

[0006] The drawbacks of box-type annealing furnaces include: 1. They cannot achieve the sealing effect of bell-type furnaces. When using a box-type furnace, a vacuum needs to be created to remove the air from the furnace body, ensuring that the oxygen content inside the furnace body reaches 0.3% and the vacuum degree reaches -0.07 MPa. The sealing performance of a box-type furnace cannot withstand this, and it can only reach a maximum of -0.03 MPa. As a result, if the air is not completely removed and nitrogen is injected, the oxygen content inside the furnace body can only reach a minimum of 5%. Under such circumstances, copper products are very easy to oxidize. Utility Model Content

[0007] In view of this, the purpose of this utility model is to propose a comprehensive annealing furnace for aluminum-based composite materials, so as to solve the technical problems that existing annealing furnaces cannot simultaneously achieve convenient loading and unloading, small temperature difference inside the furnace and good sealing performance.

[0008] To achieve the above objectives, this utility model provides a comprehensive annealing furnace for aluminum-based composite materials, comprising:

[0009] Insulated box body;

[0010] A tank with a feed inlet at the front end is housed in an insulated box.

[0011] A sealing door is provided at the feed inlet to open and close the feed inlet;

[0012] A cover is provided in the tank and has a first ventilation port and a second ventilation port at both ends. The cover has a cavity for placing workpieces inside. An interlayer for airflow is formed between the outer side wall of the cover (excluding the two ends) and the inner side wall of the tank.

[0013] A heating element, disposed in the interlayer, is used to radiate heat to the workpiece within the cavity;

[0014] A circulating fan is located at the rear end of the tank to deliver airflow into and out of the hood via the interlayer from the second vent and the first vent, thereby achieving internal circulation of airflow between the hood and the interlayer in the tank.

[0015] As a preferred embodiment of this utility model, the four outer side walls of the cover are made of four stainless steel plates joined together.

[0016] As a preferred technical solution of this utility model, the cover is provided with a feeding platform for placing workpieces. The feeding platform suspends the cover in the tank, so that at least three outer side walls of the cover can form a sandwich with the inner side wall of the tank, thereby increasing the space for airflow.

[0017] As a preferred technical solution of this utility model, the rear end of the tank is provided with an installation hole for installing a circulating fan, and there is a gap between the installation hole and the first ventilation opening to allow the fan blades of the circulating fan to operate without obstruction.

[0018] As a preferred embodiment of the present invention, the cover has a fifth outer wall at one end near the first vent, and the first vent is located on the fifth outer wall.

[0019] As a preferred embodiment of this utility model, the sealing door is connected to the tank body by a hinge, and the feed inlet is opened and closed by rotating the sealing door around the hinge.

[0020] As a preferred technical solution of this utility model, the interior of the heat preservation box is provided with an inner cavity that matches the outer contour of the tank, and one end of the inner cavity is open to allow the tank to enter.

[0021] As a preferred embodiment of this utility model, both the first vent and the second vent are located on the extension line of the fan blade shaft of the circulating fan.

[0022] As a preferred embodiment of this invention, the heating element includes a high-efficiency squirrel-cage heater and a radiant tube.

[0023] As a preferred embodiment of this invention, the circulating fan is a centrifugal fan.

[0024] The beneficial effects of this utility model are as follows: This utility model combines the traditional bell-type annealing furnace and box-type annealing furnace. The tank and cover of the bell-type annealing furnace are adjusted from vertical to horizontal and placed into the box-type annealing furnace, i.e., the insulation box. A circulating fan is set at the rear of the box-type annealing furnace to promote airflow circulation inside the tank. The feeding method adopts the horizontal feeding method of the platform trolley, similar to that of the box-type annealing furnace, eliminating the need for a turning device and making loading and unloading convenient. The circulating fan blows the air from the back of the cover forward, achieving airflow circulation, good air circulation, and small temperature difference inside the furnace. The cover is also equipped with many pipes for vacuuming at the end near the circulating fan, and the interior of the cover can reach -0.1 MPa, with good sealing performance. The heating element is set in the interlayer between the tank and the cover. The circulating fan draws the hot air heated by the heating element from the rear and blows it into the second ventilation port at the front of the front tank to contact the workpiece, minimizing heat loss. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the external three-dimensional structure of the present invention;

[0027] Figure 2 This is a partial three-dimensional structural diagram of the present invention;

[0028] Figure 3 This is a partial three-dimensional structural diagram of the present invention;

[0029] Figure 4 This is a schematic diagram of the semi-sectional main view structure of this utility model.

[0030] The markings in the diagram are: 1. Insulated box; 2. Tank; 3. Feed inlet; 4. Sealed door; 5. Cover; 6. Discharge platform; 7. First vent; 8. Second vent; 9. Circulating fan. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0032] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] like Figure 1 , Figure 2 and Figure 3 and Figure 4 As shown, a comprehensive annealing furnace for aluminum-based composite materials includes: an insulated box 1; a tank 2 with a feed inlet 3 at the front end, the tank 2 being disposed within the insulated box 1; a sealing door 4, disposed at the feed inlet 3 to open and close the feed inlet 3; a cover 5 disposed within the tank 2 with a first ventilation port 7 and a second ventilation port 8 at both ends, the cover 5 having a chamber for placing workpieces inside, and an interlayer for airflow between the outer side wall of the cover 5 (excluding the two ends) and the inner side wall of the tank 2; a heating element disposed within the interlayer for radiating heat to the workpieces within the chamber; and a circulating fan 9 disposed at the rear end of the tank 2 for sending airflow through the interlayer into and out of the cover 5 from the second ventilation port 8 and the first ventilation port 7, thereby realizing internal circulation of airflow between the cover 5 and the interlayer within the tank 2.

[0034] The above technical solution combines the advantages of bell-type and box-type annealing furnaces, namely convenient loading and unloading, small internal temperature difference, good sealing, and high heat utilization. During operation, the sealing door 4 is opened, and the material coil is removed from the material platform and placed into the cover 5 of the tank 2 through the inlet 3 using the platform trolley. The sealing door 4 is then closed, and the tank 2 is evacuated by injecting inert gas to ensure that the vacuum degree and oxygen content inside the tank 2 meet the standard values. The heating element is then activated to radiate heat onto the material coil. Simultaneously, the circulating fan 9 operates to direct the airflow according to the attached... Figure 4 As indicated by the arrow, the airflow circulates in a circular manner. The rotating blades of the circulating fan 9 discharge the airflow radially outward. The discharged airflow flows along the rear end of the tank 2 to the interlayer between the cover 5 and the tank 2, and touches the sealing door 4, causing a diversion. Part of the airflow flows back along the interlayer between the cover 5 and the tank 2, while the other part enters the inner wall along the second vent 8 of the cover 5 and leaves the cover 5 through the first vent 7. This process repeats, forming an airflow circulation between the cover 5 and the interlayer in the tank 2, thereby making the temperature uniform throughout the cover 5 and reducing the temperature difference inside the furnace.

[0035] Therefore, this annealing furnace has the following advantages: 1. Convenient loading and unloading: The feeding method adopts the horizontal feeding method of a trolley, similar to a box furnace, eliminating the need for a turning device. 2. Small temperature difference inside the furnace: The cover 5 is changed from the traditional vertical placement of a bell-type annealing furnace to a horizontal placement. The circulating fan 9 blows the air from the back of the cover 5 forward, achieving airflow circulation and good air circulation. 3. Good sealing performance: The cover 5 is also equipped with many pipes for vacuuming at the end near the circulating fan 9. The inside of the cover 5 can reach -0.1 MPa, an absolute vacuum value. 4. High heat utilization rate: Because the bell-type annealing furnace radiates heat from the outside to the inside, the heat loss is relatively large. In this solution, the heating element is set in the interlayer between the tank 2 and the cover 5. The circulating fan 9 draws the hot air heated by the heating element from the back and blows it into the second ventilation port 8 of the tank 2 in front, entering the cover 5 to contact the workpiece. The heat loss is small and the heat utilization rate is high.

[0036] Preferably, in this embodiment, the heating element includes a high-efficiency squirrel-cage heater and a radiant tube;

[0037] The above technical solution can meet the rapid heating requirements of the production process for the coil by using a high-efficiency squirrel cage heater, and it is also easy to replace and maintain. The advantage of using radiant tube indirect heating is that it avoids leakage of protective gas at the heater lead-out end, keeps the furnace space in a completely sealed state, and achieves better energy-saving effect.

[0038] Preferably, in this embodiment, the circulating fan 9 is a centrifugal fan.

[0039] The above technical solution can achieve higher air pressure and better penetration by using centrifugal fans, forming a stronger convection circulation and obtaining better furnace temperature uniformity.

[0040] like Figure 2 and Figure 3 As shown, in this embodiment, the four outer walls of the cover 5 are made of four stainless steel plates spliced ​​together.

[0041] The above technical solution can separate the heating element from the material roll by using a stainless steel plate, thus avoiding direct contact between the heating element and the material roll.

[0042] like Figure 2 and Figure 3 As shown, in this embodiment, the cover 5 is provided with a feeding platform 6 for placing workpieces. The feeding platform 6 suspends the cover 5 in the tank 2, so that at least three outer side walls of the cover 5 can form a sandwich between the inner side wall of the tank 2, thereby increasing the space for airflow.

[0043] The above technical solution allows the material roll to be easily placed into the cover 5 for positioning. The material roll is stably supported by the feeding platform 6. The material roll is heavy, up to ten tons. Therefore, the feeding platform 6 supports the material roll, and the cover 5 does not bear the weight, thus preventing the cover 5 from being damaged by pressure.

[0044] like Figure 3 and Figure 4 As shown, in this embodiment, the rear end of the tank body 2 is provided with a mounting hole for installing the circulating fan 9. There is a gap between the mounting hole and the first ventilation port 7 so that the blades of the circulating fan 9 can operate without obstruction.

[0045] The above technical solution allows the circulating fan 9 to be installed at the rear end of the tank 2.

[0046] like Figure 3 As shown, in this embodiment, the cover 5 has a fifth outer wall at one end near the first vent 7, and the first vent 7 is opened on the fifth outer wall.

[0047] The above technical solution can ensure that the airflow direction remains constant.

[0048] like Figure 3 and Figure 4 As shown, in this embodiment, the sealing door 4 is connected to the tank body 2 by a movable hinge. The inlet 3 can be opened and closed by rotating the sealing door 4 around the hinge.

[0049] The above technical solution allows for easy opening and closing of the tank 2, thereby allowing the material roll to be placed into the discharge platform 6 in the cover 5 through the feed inlet 3.

[0050] like Figure 3 and Figure 4As shown, in this embodiment, the interior of the insulated box 1 is provided with an inner cavity that matches the outer contour of the tank 2, and one end of the inner cavity is open to allow the tank 2 to enter.

[0051] The above technical solution can maximize the use of the internal space of the insulation box 1.

[0052] like Figure 3 and Figure 4 As shown, in this embodiment, both the first vent 7 and the second vent 8 are located on the extension line of the fan blade shaft of the circulating fan 9;

[0053] The above technical solution can ensure that the airflow direction remains constant, ensure that the temperature is uniform throughout the furnace body, and reduce temperature differences.

[0054] Working principle: During use, open the sealing door 4, use the platform trolley to remove the material roll from the material platform and place it into the cover 5 of the tank 2 through the feed inlet 3, ensuring that the material roll is supported by the feeding platform 6. Close the sealing door 4, and evacuate the tank 2 by injecting inert gas into the tank 2 to ensure that the vacuum degree and oxygen content inside the tank 2 reach the standard values. Start the heating element to radiate heat to the material roll. At the same time, the circulating fan 9 operates to make the airflow follow the attached... Figure 4 As indicated by the arrow, the airflow circulates in a circular manner. The rotating blades of the circulating fan 9 discharge the airflow radially outward. The discharged airflow flows along the rear end of the tank 2 to the interlayer between the cover 5 and the tank 2, and touches the sealing door 4, causing a diversion. Part of the airflow flows back along the interlayer between the cover 5 and the tank 2, while the other part enters the inner wall along the second vent 8 of the cover 5 and leaves the cover 5 through the first vent 7. This process repeats, forming an airflow circulation between the cover 5 and the interlayer in the tank 2, thereby making the temperature uniform throughout the cover 5 and reducing the temperature difference inside the furnace.

[0055] In summary, this annealing furnace combines the advantages of traditional bell-type and box-type annealing furnaces, and has the following advantages:

[0056] 1. Easy to load and unload, the feeding method adopts the horizontal feeding method of the platform trolley like the box annealing furnace, and no longer requires the turning device;

[0057] 2. The temperature difference inside the furnace is small. The cover 5 is changed from the traditional vertical placement of the bell-shaped annealing furnace to horizontal placement. The circulating fan 9 blows the air behind the cover 5 forward to achieve air circulation and good air flow.

[0058] 3. Good sealing performance. The cover 5 is equipped with many pipes for vacuuming at the end near the circulating fan 9. The inside of the cover 5 can reach -0.1 MPa, an absolute vacuum value.

[0059] 4. High heat utilization rate. Because the bell-type annealing furnace is heated from the outside to the inside, the heat loss is relatively large. However, in this solution, the heating element is set in the interlayer between the tank 2 and the cover 5. The circulating fan 9 draws the hot air heated by the heating element from the back and blows it into the second ventilation port 8 of the tank 2 in front, and then enters the cover 5 to contact the workpiece. The heat loss is small and the heat utilization rate is high.

[0060] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0061] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A comprehensive annealing furnace for aluminum matrix composites, comprising: a heat-insulating box body (1); characterized in that the annealing furnace further comprises: a tank body (2) with a feeding port (3) at the front end, the tank body (2) being arranged in the heat-insulating box body (1); a sealing door (4) arranged at the feeding port (3) to open and close the feeding port (3); a cover body (5) arranged in the tank body (2) and having a first ventilation port (7) and a second ventilation port (8) at two ends respectively, the cover body (5) having a cavity inside for placing workpieces, and an interlayer being formed between the outer side wall of the cover body (5) except the two ends and the inner side wall of the tank body (2) for the flow of air; a heating element arranged in the interlayer for heat radiation to the workpieces in the cavity; a circulating fan (9) arranged at the rear end of the tank body (2) for sending air into and out of the cover body (5) from the second ventilation port (8) and the first ventilation port (7) through the interlayer to realize internal circulation of the air between the cover body (5) and the interlayer in the tank body (2).

2. The integrated annealing furnace for aluminum matrix composite material according to claim 1, characterized by The four outer side walls of the cover body (5) are spliced by four stainless steel plates.

3. The integrated annealing furnace for aluminum matrix composite material according to claim 2, characterized by A feeding platform (6) for placing workpieces is arranged in the cover body (5), the feeding platform (6) being suspended and arranged in the tank body (2) to make at least three outer side walls of the cover body (5) form an interlayer with the inner side wall of the tank body (2), thereby increasing the space for the flow of air.

4. The integrated annealing furnace for aluminum matrix composite material according to claim 1, characterized by The rear end of the tank body (2) is provided with a mounting hole for mounting the circulating fan (9), and the mounting hole is spaced apart from the first ventilation port (7) to allow the fan blades of the circulating fan (9) to operate without obstruction.

5. The integrated annealing furnace for aluminum matrix composite material according to claim 4, characterized by The cover body (5) is provided with a fifth outer side wall at the end close to the first ventilation port (7), and the first ventilation port (7) is arranged on the fifth outer side wall.

6. The integrated annealing furnace for aluminum matrix composite material according to claim 1, characterized by The sealing door (4) is connected to the tank body (2) in a movable hinged manner, and the sealing door (4) is rotated around the hinge to open and close the feeding port (3).

7. The integrated annealing furnace for aluminum matrix composite material according to any one of claims 1 to 6, characterized by The heat-insulating box body (1) is internally provided with an inner cavity matching the outer contour of the tank body (2), and one end of the inner cavity is open to allow the tank body (2) to enter.

8. The integrated annealing furnace for aluminum matrix composite material according to claim 1, characterized by The first ventilation port (7) and the second ventilation port (8) are both located on the extended line of the fan shaft of the circulating fan (9).

9. The integrated annealing furnace for aluminum matrix composite material according to claim 1, characterized by The heating element comprises a high-efficiency squirrel cage heater and a radiation pipe.

10. The integrated annealing furnace for aluminum matrix composite material according to claim 1, characterized by The circulating fan (9) is a centrifugal fan.

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