A preheating device for filter tank in aluminum ingot casting line

Abstract

This utility model relates to the technical field of preheating devices, and discloses a preheating device for a filter tank in an aluminum ingot casting line. It includes a filter tank and a fixed frame on one side. A movable component is mounted above the fixed frame, and a movable frame is mounted above the movable component. An infrared heater is connected below the movable frame, and hot air components are mounted on both sides of the infrared heater. A thermal imager is mounted directly above the filter tank, and a controller is mounted on one side of the fixed frame. The thermal imager is electrically connected to the controller. In this utility model, the infrared heater directly acts on the main body area of ​​the filter tank through directional radiation, achieving rapid heating. Simultaneously, the hot air components on both sides of the infrared heater transport heated air through hot air pipes, which is then ejected through multiple evenly distributed hot air nozzles to provide convection heating for blind spots such as the corners and recesses of the filter tank that are difficult to cover by infrared radiation. This synergistic heating method effectively solves the problem of uneven preheating and significantly reduces the temperature difference on the surface of the filter tank.

Description

Technical Field

[0001] This utility model relates to the field of preheating device technology, and in particular to a preheating device for a filter tank in an aluminum ingot casting line. Background Technology

[0002] In the production process of aluminum ingots, the primary function of the filter tank is to filter the high-temperature aluminum liquid before casting, removing impurities (such as oxides, metal scraps, etc.) mixed in the aluminum liquid. Before entering the casting stage, the aluminum liquid must first flow through the filter structure (such as filter plate) inside the filter tank. Impurities are intercepted by the filter structure, thus obtaining aluminum liquid with higher purity.

[0003] To ensure filtration effectiveness, the filter tank must be fully and evenly preheated before the molten aluminum enters. This prevents the molten aluminum from solidifying locally or clogging the filter structure due to the low temperature of the filter tank. If the filter tank is not preheated sufficiently or unevenly, a violent thermal shock will occur when the high-temperature molten aluminum comes into contact with the cold filter tank. This will cause the molten aluminum to solidify instantly on the surface of the filter tank and in the pores of the filter plate, forming a solidified film that blocks the flow channels.

[0004] Currently, the industry commonly uses handheld gas spray guns or fixed gas flames to preheat the filter tank. This method has the following drawbacks:

[0005] 1. Uneven preheating temperature: The area directly exposed to the flame is locally overheated, reaching over 600℃, while the back surface or corners with complex structures are underheated, easily forming local cold zones. These cold zones will become the starting point for the solidification of molten aluminum after it enters, directly causing flow channel blockage.

[0006] 2. The degree of preheating depends on the operator's experience judgment (such as inferring the temperature by observing the flame color and the appearance of the tank), making it impossible to monitor and accurately control the preheating temperature. This results in large fluctuations in the preheating quality of different batches and different operators, making it difficult to meet the strict standards for filter tank preheating temperature in high-quality aluminum alloy production, and indirectly affecting the consistency and pass rate of aluminum ingot products. Utility Model Content

[0007] To overcome the above shortcomings, this utility model provides a preheating device for the filter tank of an aluminum ingot casting line, which solves the problems of uneven temperature and inaccurate temperature control in traditional preheating methods, and realizes uniform preheating, real-time monitoring and precise control of the filter tank.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a preheating device for a filter tank in an aluminum ingot casting line, comprising a filter tank and a fixed frame disposed on one side thereof, a movable component disposed above the fixed frame, a movable frame disposed above the movable component, an infrared heater connected below the movable frame, hot air components disposed on both sides of the infrared heater, a thermal imager disposed directly above the filter tank, and a controller disposed on one side of the fixed frame, the thermal imager being electrically connected to the controller.

[0009] As a further description of the above technical solution: the moving component includes a moving block, a moving plate is fixedly connected above the moving block, the upper surface of the moving plate is fixedly connected to the moving frame, a lead screw is threaded through the inside of the moving block, fixed blocks are provided at both ends of the lead screw, and a drive motor is connected to one end of the lead screw through a coupling, and the drive motor is electrically connected to the controller.

[0010] As a further description of the above technical solution: the fixed block is fixedly connected to the fixed frame, a slide rail is provided on one side of the fixed block, and a slide groove is provided at the bottom of the movable block and is slidably connected to the slide rail.

[0011] As a further description of the above technical solution: the hot air assembly includes a hot air nozzle, the input end of the hot air nozzle is connected to a hot air duct, the other end of the hot air duct is connected to an air intake fan, and an air heater is provided in the middle section of the hot air duct.

[0012] As a further description of the above technical solution: there are several hot air nozzles, which are evenly distributed on both sides of the infrared heater.

[0013] As a further description of the above technical solution: the air intake fan is fixedly connected to one side of the fixed frame and electrically connected to the controller.

[0014] As a further description of the above technical solution: the hot air duct is a retractable corrugated metal flexible hose, and is detachably fixed to the side wall of the mobile frame by multiple pipe clamps.

[0015] As a further description of the above technical solution: the infrared heater is located above the filter tank and is electrically connected to the controller.

[0016] As a further description of the above technical solution: a horizontal filter plate and a vertical filter plate are arranged sequentially in the filter tank.

[0017] This utility model has the following beneficial effects:

[0018] 1. In this utility model, the infrared heater directly acts on the main body area of ​​the filter tank through directional radiation to achieve rapid heating; at the same time, the hot air components on both sides of the infrared heater deliver heated air through hot air pipes and spray it out through multiple evenly distributed hot air nozzles to provide convection heating for blind areas such as the corners and recesses of the filter tank that are difficult to be covered by infrared radiation; this synergistic heating method effectively solves the problem of uneven preheating and significantly reduces the temperature difference on the surface of the filter tank.

[0019] 2. In this utility model, the thermal imager can collect the surface temperature field data of the filter tank in real time and transmit the data synchronously to the controller. The controller automatically adjusts the heating power of the infrared heater, the air intake volume of the hot air component and the moving speed of the moving component according to the preset preheating target temperature, thus constructing a complete closed-loop system of monitoring-feedback-adjustment. This avoids the subjective error of human judgment, can accurately control the preheating temperature, ensures that the preheating effect is consistent each time, and meets the strict standards for filter tank preheating in high-quality aluminum alloy production.

[0020] 3. In this utility model, the moving component drives the lead screw to rotate through the drive motor. By utilizing the threaded engagement between the lead screw and the moving block, the rotational motion is converted into the linear motion of the moving block, which in turn drives the moving frame carrying the infrared heater and hot air component to move smoothly along the slide rail. This movable design allows the heating component to scan and preheat along the entire length of the filter tank, solving the defect that the traditional fixed heating method cannot cover the entire area. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a filter tank preheating device for an aluminum ingot casting line proposed in this utility model.

[0022] Figure 2 This is a schematic diagram of the moving component structure of a filter tank preheating device for an aluminum ingot casting line proposed in this utility model.

[0023] Figure 3 This is a schematic diagram of the hot air assembly structure of a preheating device for a filter tank in an aluminum ingot casting line proposed in this utility model.

[0024] Figure 4 This is a front view of a filter tank preheating device for an aluminum ingot casting line proposed in this utility model;

[0025] Figure 5 This is a top view of the filter tank of a filter tank preheating device for an aluminum ingot casting line proposed in this utility model.

[0026] Figure 6 This is a cross-sectional view of the filter tank of a preheating device for an aluminum ingot casting line filter tank proposed in this utility model.

[0027] Legend:

[0028] 1. Fixed frame; 2. Filter tank; 201. Horizontal filter plate; 202. Vertical filter plate; 3. Moving assembly; 301. Moving block; 302. Moving plate; 303. Slide rail; 304. Fixed block; 305. Lead screw; 306. Drive motor; 4. Infrared heater; 5. Hot air assembly; 501. Hot air nozzle; 502. Hot air duct; 503. Air heater; 504. Air intake fan; 6. Thermal imager; 7. Controller; 8. Moving frame. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Reference Figure 1-6 This utility model provides an embodiment of a preheating device for a filter tank in an aluminum ingot casting line, comprising a filter tank 2 and a fixed frame 1 disposed on one side thereof. A movable component 3 is disposed above the fixed frame 1 for driving the heating system to move linearly along the length of the filter tank 2 to achieve full tank coverage preheating. A movable frame 8 is disposed above the movable component 3 as an integrated mounting carrier for infrared heating and hot air heating. An infrared heater 4 is connected below the movable frame 8 to achieve rapid heating of the filter tank 2 through infrared radiation. Hot air components 5 are disposed on both sides of the infrared heater 4 to supplement the infrared heating through convection heat transfer. A thermal imager 6 is disposed directly above the filter tank 2 for collecting temperature field distribution data on the surface of the tank. A controller 7 is disposed on one side of the fixed frame 1, and the thermal imager 6 is electrically connected to the controller 7.

[0031] With the fixed frame 1 as the base support, the movable component 3 drives the movable frame 8, which carries the infrared heater 4 and the hot air component 5, to achieve a composite preheating mode of infrared radiation heating (directional rapid heating) of the infrared heater 4 and hot air convection heating (auxiliary heat equalization) of the hot air component 5. At the same time, the thermal imager 6 collects the surface temperature data of the filter tank 2 and transmits the data to the controller 7 to build a closed-loop system for temperature monitoring and control. This solves the problem of uneven preheating in traditional heating methods. The composite preheating mode can reduce the temperature difference on the surface of the filter tank 2 and avoid solidification and blockage of the aluminum liquid due to insufficient or uneven preheating of the filter tank 2.

[0032] Specifically, the moving component 3 includes a moving block 301, a moving plate 302 fixedly connected above the moving block 301, the upper surface of the moving plate 302 fixedly connected to the moving frame 8, a lead screw 305 threadedly connected inside the moving block 301, fixed blocks 304 provided at both ends of the lead screw 305, and a drive motor 306 connected to one end of the lead screw 305 via a coupling, and the drive motor 306 is electrically connected to the controller 7;

[0033] The controller 7 sends a command to the drive motor 306, which drives the lead screw 305 to rotate around its own axis through the coupling. The lead screw 305 and the moving block 301 are threadedly engaged, and the rotational motion of the lead screw 305 is converted into the linear motion of the moving block 301, which in turn drives the moving frame 8 (and the infrared heater 4 and the hot air assembly 5) above to move synchronously in a straight line through the moving plate 302. The moving assembly 3 provides a movable power source for the infrared heater 4 and the hot air assembly 5, so that the heating components can move along the length or width of the filter tank 2, covering all areas of the filter tank 2, and avoiding the problems of local overheating or local lack of preheating caused by the traditional fixed heating method.

[0034] Specifically, the fixed block 304 is fixedly connected to the fixed frame 1, and a slide rail 303 is provided on one side of the fixed block 304. The bottom of the movable block 301 is provided with a sliding groove and is slidably connected to the slide rail 303. The fixed block 304 is rigidly connected to the fixed frame 1 to provide stable support for the slide rail 303. The sliding groove at the bottom of the movable block 301 forms a sliding fit with the slide rail 303. When the lead screw 305 drives the movable block 301 to move linearly, the slide rail 303 restricts the movement direction of the movable block 301 (it only moves along the axis of the slide rail 303) to prevent the movable block 301 from deviating.

[0035] Specifically, the hot air assembly 5 includes a hot air nozzle 501. The input end of the hot air nozzle 501 is connected to a hot air duct 502, and the other end of the hot air duct 502 is connected to an air intake fan 504. An air heater 503 is installed in the middle section of the hot air duct 502. The air intake fan 504 draws in outside air, and the air is heated to a preset temperature when it flows through the air heater 503 in the middle section of the hot air duct 502. The high-temperature hot air is transmitted along the hot air duct 502 to the hot air nozzle 501, and finally sprayed out by the hot air nozzle 501 and acts on the surface of the filter tank 2. It works in synergy with the radiation heating of the infrared heater 4 to supplement the blind spots of the radiation heating of the infrared heater 4 (such as the corners and recesses of the filter tank 2), and solve the problem that the infrared heater 4 has strong heating directionality but uneven coverage. At the same time, the heat exchange efficiency of the surface of the filter tank 2 is improved by hot air circulation, and the preheating speed is accelerated, thereby improving the production efficiency of the aluminum ingot casting line.

[0036] Specifically, there are several hot air nozzles 501, which are evenly distributed on both sides of the infrared heater 4. They can form a multi-point, fully covered hot airflow area on the surface of the filter tank 2, so that the hot air intensity at each point on the surface of the filter tank 2 is consistent, avoiding the problem of concentrated hot air or no airflow in some areas caused by single hot air nozzles 501; further improving the uniformity of hot air heating, increasing the utilization rate of hot air, reducing hot air waste, and reducing energy consumption.

[0037] Specifically, the air intake fan 504 is fixedly connected to one side of the mounting bracket 1 and electrically connected to the controller 7. The controller 7 sends start / stop or airflow adjustment commands to the air intake fan 504 based on the temperature data of the filter tank 2 transmitted by the thermal imager 6 (such as increasing the airflow when the temperature is too low and decreasing the airflow when the temperature reaches the target), thereby matching the hot air supply with the preheating demand, avoiding the lag and error of manual airflow adjustment, and ensuring that the hot air supply is accurately adapted to the preheating stage. Adjusting the airflow as needed can avoid energy waste caused by excessive air supply and meet the energy-saving requirements.

[0038] Specifically, the hot air duct 502 uses a retractable corrugated metal hose, which is detachably fixed to the side wall of the movable frame 8 by multiple pipe clamps. The retractable corrugated metal hose has certain tensile and bending properties, and can synchronously extend or slightly bend with the linear movement of the movable frame 8, avoiding damage caused by the pulling of the hot air duct 502 and extending the service life of the hot air duct 502. The detachable pipe clamps facilitate the installation, disassembly and replacement of the hot air duct 502.

[0039] Specifically, the infrared heater 4 is located above the filter tank 2, ensuring that the infrared radiation energy acts directly on the surface of the filter tank 2, thereby improving the preheating efficiency; and it is electrically connected to the controller 7 to realize the automatic control of the heating power of the infrared heater 4, which can be flexibly adjusted according to the preheating progress, shortening the heating time while avoiding energy waste.

[0040] Specifically, the filter tank 2 is provided with a horizontal filter plate 201 and a vertical filter plate 202 in sequence. When filtering aluminum liquid, the aluminum liquid is filtered first through the horizontal filter plate 201. The bottom of the horizontal filter plate 201 is a sunken design, with a cavity and outlet for a certain amount of space. After being filtered by the horizontal filter plate 201, the aluminum liquid can flow out through this outlet to enter the next process. At the same time, the aluminum liquid can also be filtered through the vertical filter plate 202 to avoid the problem of the aluminum liquid being unable to enter the next process due to the blockage of a single filter plate.

[0041] Working principle: When using this device for preheating, the operator sets the target preheating temperature through the controller 7. The controller 7 starts the infrared heater 4, the air heater 503 and the air intake fan 504. The drive motor 306 drives the moving frame 8 to move at a constant speed along the slide rail 303. The infrared heater 4 and the hot air nozzle 501 simultaneously heat the filter tank 2. The thermal imager 6 continuously monitors the temperature and provides feedback. The controller 7 dynamically adjusts the heating power, air volume and moving speed.

[0042] When the thermal imager 6 detects that the surface temperature of the filter tank 2 meets the standard across the entire area and the uniformity meets the requirements, the controller 7 sends a "preheating complete" signal, automatically stops heating, and moves the mobile frame 8 to the standby position, waiting for the aluminum liquid to flow in for filtration.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A preheating device for a filter tank in an aluminum ingot casting line, comprising a filter tank (2) and a fixing frame (1) disposed on one side thereof, characterized in that: A movable component (3) is provided above the fixed frame (1), a movable frame (8) is provided above the movable component (3), an infrared heater (4) is connected below the movable frame (8), hot air components (5) are provided on both sides of the infrared heater (4), a thermal imager (6) is provided directly above the filter tank (2), a controller (7) is provided on one side of the fixed frame (1), and the thermal imager (6) is electrically connected to the controller (7).

2. The preheating device for the filter tank of an aluminum ingot casting line according to claim 1, characterized in that: The moving component (3) includes a moving block (301), a moving plate (302) is fixedly connected above the moving block (301), the upper surface of the moving plate (302) is fixedly connected to the moving frame (8), a lead screw (305) is threaded through the inside of the moving block (301), fixed blocks (304) are provided at both ends of the lead screw (305), and a drive motor (306) is connected to one end of the lead screw (305) through a coupling. The drive motor (306) is electrically connected to the controller (7).

3. The preheating device for the filter tank of an aluminum ingot casting line according to claim 2, characterized in that: The fixed block (304) is fixedly connected to the fixed frame (1). A slide rail (303) is provided on one side of the fixed block (304). A sliding groove is provided at the bottom of the movable block (301) and it is slidably connected to the slide rail (303).

4. The preheating device for the filter tank of an aluminum ingot casting line according to claim 1, characterized in that: The hot air assembly (5) includes a hot air nozzle (501), the input end of which is connected to a hot air duct (502), the other end of which is connected to an air intake fan (504), and an air heater (503) is provided in the middle section of the hot air duct (502).

5. The preheating device for the filter tank of an aluminum ingot casting line according to claim 4, characterized in that: There are several hot air nozzles (501), which are evenly distributed on both sides of the infrared heater (4).

6. The preheating device for the filter tank of an aluminum ingot casting line according to claim 4, characterized in that: The air intake fan (504) is fixedly connected to one side of the fixed frame (1) and electrically connected to the controller (7).

7. The preheating device for the filter tank of an aluminum ingot casting line according to claim 4, characterized in that: The hot air duct (502) is a retractable corrugated metal hose and is detachably fixed to the side wall of the movable frame (8) by multiple pipe clamps.

8. The preheating device for the filter tank of an aluminum ingot casting line according to claim 1, characterized in that: The infrared heater (4) is located above the filter tank (2) and is electrically connected to the controller (7).

9. The preheating device for the filter tank of an aluminum ingot casting line according to claim 1, characterized in that: The filter tank (2) is provided with a horizontal filter plate (201) and a vertical filter plate (202) in sequence.

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