Rapid cooling furnace device for aluminum alloy round bar homogenizing process

Abstract

The utility model discloses a rapid cooling furnace device for an aluminum alloy round bar homogenizing process, which belongs to the technical field of aluminum bar processing and comprises a box-type cooling furnace, a high-pressure fan and a cooling furnace electric control system, the box-type cooling furnace comprises an inner-layer working area and an outer-layer cooling air duct, the inner-layer working area is used for placing stacked aluminum alloy round bars, and the outer-layer cooling air duct is used for cooling the stacked aluminum alloy round bars. The outer-layer cooling air duct is arranged around the inner-layer working area and communicates with the outside through a cooling furnace top pipeline, and the box-type cooling furnace is of a totally-closed furnace type structure. According to the utility model, an ultra-large air volume high-pressure fan exhaust cooling mode is innovatively adopted, cooling air is extracted from the outside, and hot air is exhausted from an exhaust pipeline at the top of the furnace. Meanwhile, water mist nozzles are densely distributed in the cooling furnace, a flow electric adjusting valve is arranged on a cooling water inlet pipeline, a PLC is adopted in the aspect of electrical control, different cooling processes can be preset for selection according to aluminum alloy round bars of different specifications, and the target of the controllable rapid cooling process is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum rod processing, in particular to a rapid cooling furnace device for an aluminum alloy round rod homogenization process. Background Art

[0002] The aluminum alloy homogenization process is to make the excess copper, silicon, magnesium and other elements in the aluminum alloy evenly distributed through heat treatment methods, eliminate casting defects, adjust the alloy structure, and improve the strength, toughness and corrosion resistance of the aluminum alloy. After the aluminum alloy is homogenized, the intercrystalline spacing of the alloy becomes smaller, the grains become finer, the plasticity and toughness of the metal material can be improved, and the fatigue resistance and corrosion resistance of the aluminum alloy material can also be improved.

[0003] In industrial production, the aluminum alloy homogenization process is achieved through special homogenization furnaces and cooling furnace equipment. For various types of aluminum alloy round bars, the round bars stacked in piles are first sent to the homogenization furnace and heated to the set temperature to achieve the metal temperature uniformity requirements, and then the round bar stacks are transferred to the cooling furnace for rapid cooling to room temperature to complete the complete homogenization heat treatment process.

[0004] After years of research and improvement, the technology of various types of aluminum alloy homogenizing furnaces in China is now relatively mature, and can achieve a temperature control accuracy of ±3 degrees for metal temperature. The technical indicators have met the process requirements. However, in terms of cooling furnaces, the technology still has certain problems. Most of the commonly used cooling furnaces currently use a small-power axial flow fan forced air cooling + water mist mixed cooling method. Specifically, there are the following shortcomings in the application: the cooling speed is slow, the cooling speed is about 250 degrees per hour, which cannot meet the homogenization process requirements of high-end aluminum alloy bars; the axial flow fan has low wind pressure, and facing the round bar stack, the wind pressure loss is serious, the cooling speed of the aluminum bars in the middle and rear of the stack is low, and the air cooling efficiency is low; in fact, this cold air furnace mainly relies on water mist cooling, but although excessive water spraying can increase the cooling speed, it will cause the surface aluminum bars to bend and deform due to excessive cooling; the electrical control means are simple, basically based on simple switch control, and the cooling intensity of aluminum bars of different specifications depends on manual adjustment and control, and the technical level is backward; under the action of the fan, a large amount of cooling water overflows to the outside of the furnace body, and the surrounding environment of the equipment is poor; the cooling air is directly drawn from the workshop, which is very unfriendly to the production environment of the northern winter heating workshop, and increases the energy consumption loss of the workshop.

[0005] The cooling furnace is a key link in the homogenization heat treatment process, especially in the first hour after the aluminum rod is heated. An extremely fast cooling speed is required to achieve a better homogenization process effect. Therefore, how to enhance the cooling efficiency is a technical problem that needs to be solved urgently in cooling furnace technology. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a rapid cooling furnace device for an aluminum alloy round bar homogenization process.

[0007] The technical solution of the utility model is: a rapid cooling furnace device for a homogenizing process of aluminum alloy round bars, comprising: a box-type cooling furnace, a plurality of ultra-large air volume high-pressure fans and a cooling furnace electronic control system, the box-type cooling furnace comprising an inner working area and an outer cooling air duct, the inner working area is used to place stacked aluminum alloy round bars, the outer cooling air duct is arranged around the inner working area and is connected to the outdoors through a cooling furnace top pipeline, the box-type cooling furnace is a fully enclosed furnace structure, and the high-pressure fan is arranged on the box-type cooling furnace top.

[0008] Furthermore, the cooling furnace top pipeline includes an exhaust duct and an air supply duct.

[0009] Furthermore, the high-pressure fan adopts variable frequency speed control, and different fan speeds are set according to different specifications of aluminum alloy round bars to control the cooling speed.

[0010] Furthermore, the high-pressure fan adopts a high-pressure and large-flow fan, and the fan type selects an inserted high-pressure axial flow fan or an inserted high-pressure centrifugal fan, with a wind pressure of more than 1000Pa, and the air volume of a single fan is not less than 100,000 cubic meters.

[0011] Furthermore, a water mist system is provided at the top of the inner working area and on the air inlet side. The water mist system includes a water inlet pipeline, and a plurality of water mist nozzles and electric regulating valves are distributed on the water inlet pipeline.

[0012] Furthermore, the cooling furnace electrical control system adopts a PLC controller, which presets multiple cooling control process routes according to time or target temperature to meet the process requirements of rapid cooling and non-deformation of aluminum alloy round bars of different specifications.

[0013] Furthermore, a water collection pit is arranged at the bottom of the box-type cooling furnace, and the water collection pit is connected to the drainage pipeline.

[0014] The beneficial technical effect of the utility model is as follows: the utility model designs a new type of cooling furnace device, innovatively adopts a super-large air volume high-pressure fan exhaust cooling mode, the cooling air is extracted from the outside, and under the action of high wind pressure, the cooling air passes through the layers of the aluminum alloy round bar stack at high speed, and conducts strong heat exchange with the surface of the aluminum alloy round bar, and the hot air is discharged from the exhaust duct on the top of the furnace. At the same time, the cooling furnace is also densely covered with water mist nozzles, and a flow electric regulating valve is provided on the cooling water inlet pipeline. The PLC controller is used for electrical control, and different cooling processes can be preset for different specifications of aluminum alloy round bars for selection, so as to achieve the goal of controllable rapid cooling process.

[0015] Specifically, this cooling furnace adopts a large-flow high-pressure fan strong exhaust cooling mode, which significantly improves the air cooling efficiency. Under pure air cooling conditions, the cooling rate of a conventional 10-inch aluminum bar in the first hour is ≥300°C; the high-pressure fan adopts a top-mounted installation structure, which is easy to hoist and repair. Compared with the side horizontal installation mode commonly used in the industry, it does not occupy the furnace side space and has a higher workshop utilization rate; the high-pressure fan adopts frequency conversion control, and an electric regulating valve is provided on the water inlet pipe. The cooling speed can be effectively adjusted and controlled by adjusting the fan speed and the amount of cooling water, which can effectively control the bending deformation of the aluminum bar caused by rapid cooling.

[0016] In addition, in the wind + water mist mixed cooling mode, in actual application, the cooling speed of a conventional 10-inch aluminum bar in the first hour is ≥350℃, and the aluminum bar has no obvious bending deformation. The cooling furnace body adopts a fully enclosed structure around it, which effectively solves the problem of cooling water overflow and improves the surrounding environment of the equipment. The cooling air is drawn from the outside, and the hot air is sent to the outside for discharge, solving the problem of indoor hot air loss in the heating workshop. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Aluminum alloy round bar homogenization process rapid cooling furnace device structure diagram Figure 1 ;

[0018] Figure 2 Aluminum alloy round bar homogenization process rapid cooling furnace device structure diagram Figure 2 ;

[0019] Figure 3 It is a schematic diagram of the water mist system structure;

[0020] In the figure,

[0021] 1. Box-type cooling furnace; 2. Aluminum alloy round bar stack; 3. High-pressure fan; 4. Exhaust duct; 5. Water mist system; 6. Air supply duct; 7. Sump; 8. Workshop wall; 9. Cooling furnace electronic control system; 5-1. Water mist nozzle; 5-2. Water inlet pipeline; 5-3. Electric regulating valve. DETAILED DESCRIPTION

[0022] In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0023] See also Figure 1-3The present specific embodiment discloses a rapid cooling furnace device for a homogenizing process of aluminum alloy round bars, comprising: a box-type cooling furnace 1, a plurality of ultra-large air volume high-pressure fans 3 and a cooling furnace electronic control system 9. The cooling furnace 1 comprises an inner working area and an outer cooling air duct. The inner working area is used to place stacked aluminum alloy round bars 2. The outer cooling air duct is arranged around the inner working area and is connected to the outdoors through a cooling furnace top pipeline. The cooling furnace device adopts a fully enclosed furnace structure.

[0024] More specifically, the cooling furnace roof pipeline includes an exhaust duct 4 and an air supply duct 6. A plurality of ultra-large air volume high-pressure fans 3 are arranged on the cooling furnace roof. When the high-pressure fans 3 are in operation, a large amount of fresh cold air is sucked in from the outside through the air supply duct 6. The cold air then enters the inner working area and passes through the interlayer gaps of the aluminum alloy round bars 2 to exchange heat with the aluminum alloy round bars 2, forcing the aluminum alloy round bars 2 to be cooled. The hot air exhausted after the exchange is discharged to the outside through the exhaust duct 4 arranged on the top. This process is continued, and the aluminum alloy round bars 2 can be cooled quickly. The high-pressure fan 3 is designed to be placed on the top, which is easy to inspect and maintain and does not occupy the side space of the furnace. All cooling air of the cooling furnace is drawn from the outside, and the indoor air of the factory building is not consumed. All hot air is sent to the outside of the factory building for discharge.

[0025] In this specific embodiment, the high-pressure fan 3 used has a relatively high wind pressure, which can overcome the resistance generated by the cold air passing through the gaps between the layers of stacked aluminum alloy round bars 2, thereby realizing an exhaust cooling mode. The high-pressure fan 3 adopts variable frequency speed control, and different fan speeds can be set according to different specifications of aluminum alloy round bars to control the cooling speed.

[0026] In this specific embodiment, the high-pressure fan 3 adopts a high-pressure and large-flow fan. The fan type is a high-pressure axial flow fan or an inserted high-pressure centrifugal fan. The wind pressure is above 1000Pa, and the air volume of a single fan is not less than 100,000 cubic meters. The high wind pressure is used to overcome the gap resistance between the aluminum alloy round rod layers.

[0027] More specifically, a water mist system 5 is provided at the top of the inner working area and the air inlet side. The water mist system 5 includes a water inlet pipeline 5-2. A plurality of water mist nozzles 5-1 are distributed on the water inlet pipeline 5-2. When the water supply valve is opened, the water mist nozzles 5-1 will generate a large amount of water mist. Driven by the cooling wind, the water mist contacts the aluminum alloy round rod to accelerate the cooling of the aluminum alloy round rod. An electric regulating valve 5-3 is also provided on the water inlet pipeline 5-2 to adjust the water supply and control the cooling speed.

[0028] More specifically, the matching cooling furnace electric control system 9 adopts a PLC controller, which can adjust the speed of the high-pressure fan 3 and the amount of cooling water, and pre-set multiple cooling control process routes according to time or target temperature to meet the process requirements of fast cooling and non-deformation of aluminum alloy round bars of different specifications. The electric control system 9 adopts a PLC programmable controller, and according to the cooling speed requirements of aluminum bars of different specifications, multiple cooling control curves are preset, which can achieve the fastest cooling speed effect under the premise of ensuring that the aluminum alloy round bars are not deformed, and the equipment is easy to operate and control.

[0029] More specifically, the cooling furnace 1 is a fully enclosed structure, and the cooled water naturally flows to the sump 7 at the bottom of the cooling furnace and is then discharged through a drainage pipe (not shown in the figure), so that cooling water does not overflow, thereby improving the environment surrounding the equipment.

[0030] In this specific embodiment, a workshop wall 8 is arranged outside the cooling furnace 1. The workshop wall 8 ensures a closed design of the entire device, ensures that cooling air is drawn from the outside, and hot air is sent to the outside for discharge, which is energy-saving and efficient.

[0031] The above contents are merely examples and explanations of the present utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the present utility model.

Claims

1. A rapid cooling furnace device for homogenizing aluminum alloy round bars, characterized in that: include: A box-type cooling furnace (1), a plurality of ultra-large air volume high-pressure fans (3), and a cooling furnace electric control system (9), wherein the box-type cooling furnace (1) comprises an inner working area and an outer cooling air duct, wherein the inner working area is used to place stacked aluminum alloy round bars (2), and the outer cooling air duct is arranged around the inner working area and is connected to the outdoors through a cooling furnace roof pipeline. The box-type cooling furnace (1) is a fully enclosed furnace structure, and the plurality of ultra-large air volume high-pressure fans (3) are arranged on the roof of the box-type cooling furnace (1).

2. The aluminum alloy round bar homogenization process rapid cooling furnace device according to claim 1 is characterized in that: The cooling furnace top pipeline comprises an exhaust duct (4) and an air supply duct (6).

3. The aluminum alloy round bar homogenization process rapid cooling furnace device according to claim 2 is characterized in that: The high-pressure fan (3) is controlled by variable frequency speed regulation, and different fan speeds are set according to different specifications of aluminum alloy round bars to control the cooling rate.

4. The aluminum alloy round bar homogenization process rapid cooling furnace device according to claim 3 is characterized in that: The high-pressure fan (3) adopts a high-pressure and large-flow fan. The fan type is selected to be an insertable high-pressure axial flow fan or an insertable high-pressure centrifugal fan. The wind pressure is above 1000Pa, and the air volume of a single high-pressure fan is not less than 100,000 cubic meters.

5. The aluminum alloy round bar homogenization process rapid cooling furnace device according to claim 1 is characterized in that: A water mist system (5) is also provided at the top of the inner working area and on the air inlet side. The water mist system (5) comprises a water inlet pipeline (5-2), and a plurality of water mist nozzles (5-1) and electric regulating valves (5-3) are distributed on the water inlet pipeline (5-2).

6. The aluminum alloy round bar homogenization process rapid cooling furnace device according to claim 5, characterized in that: The cooling furnace electric control system (9) adopts a PLC programmable controller, and multiple cooling control process routes are preset according to time or target temperature to meet the process requirements of fast cooling of aluminum alloy round bars of different specifications without deformation.

7. The aluminum alloy round bar homogenization process rapid cooling furnace device according to claim 1 is characterized in that: A water collection pit (7) is arranged at the bottom of the box-type cooling furnace (1), and the water collection pit (7) is connected to a drainage pipeline.

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