CN211079253U - Hot air circulating device for enhancing heating effect of aluminum alloy product heat treatment furnace - Google Patents
Hot air circulating device for enhancing heating effect of aluminum alloy product heat treatment furnace Download PDFInfo
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- CN211079253U CN211079253U CN201921714745.9U CN201921714745U CN211079253U CN 211079253 U CN211079253 U CN 211079253U CN 201921714745 U CN201921714745 U CN 201921714745U CN 211079253 U CN211079253 U CN 211079253U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 96
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 17
- 230000000694 effects Effects 0.000 title claims abstract description 13
- 230000002708 enhancing effect Effects 0.000 title claims description 3
- 239000003779 heat-resistant material Substances 0.000 claims abstract description 5
- 238000005728 strengthening Methods 0.000 claims abstract description 4
- 238000005192 partition Methods 0.000 claims description 7
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000004321 preservation Methods 0.000 description 12
- 238000002955 isolation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
A hot air circulating device for strengthening the heating effect of an aluminum alloy product heat treatment furnace belongs to the technical field of aluminum alloy product heat treatment equipment. The heat treatment furnace is characterized in that an axial flow fan, an air duct, a burner, an air baffle and the like are arranged on the rotary heat treatment furnace, the lower part of the wall of the air duct is separately provided with an air outlet with a rectangular heating zone without a bottom edge and with a downward opening, and an air baffle made of heat-resistant material is vertically arranged between each row on the workpiece supporting frame, so that a circulating air system is improved, the air speed of the heating zone is increased, the heating speed of the workpiece is increased, the energy consumption and the equipment cost are reduced, the yield is improved, and the effect is obvious.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy product heat treatment furnace equipment, and particularly relates to a hot air circulating device for strengthening the heating effect of an aluminum alloy product heat treatment furnace.
Background
In recent years, in the technical field of heat treatment of aluminum alloy products, in order to improve the intelligentized and unmanned technology of equipment, realize intelligent manufacturing and reduce energy consumption, a rotary aluminum alloy heat treatment furnace (hereinafter referred to as a heat treatment furnace) is more and more widely applied. The equipment has the characteristics of compact structure, no charging basket, high automation degree, small occupied area and suitability for the requirements of small-batch and multi-variety flexible manufacturing, so that the equipment is more and more widely used in the heat treatment process of aluminum alloy products, and the market of the equipment is continuously expanded and rapidly developed.
The structure of the heat treatment furnace is relatively simple, gas is heated by the burner and then is delivered to the bottom of the heat treatment furnace, then the gas upwards enters a heating and heat preservation area of a workpiece from the bottom space of the heat treatment furnace, the workpiece on the workpiece supporting frame in the area is heated and heat-preserved, heat carried by hot air is continuously absorbed by the workpiece in the heating and heat preservation area, the temperature of the hot air continuously drops, the hot air is sucked away after rising to the top of the furnace body, the gas is delivered to the position near the burner and is heated again, and the gas is delivered to the bottom space of the furnace body again and then enters next circulation. Therefore, the equipment structure ensures that the circulating air in the furnace is distributed too uniformly and flows at a low speed, so that the heat transfer to the workpiece is influenced on one hand, and the heat brought by the low flow speed is limited on the other hand, so that the requirement of quickly heating the processed workpiece is not easy to realize, and the heat treatment efficiency is influenced.
Therefore, the circulating air guide system of the device needs to be improved, so that the temperature rise speed of the aluminum alloy parts to be treated is high, the furnace is more compact, and the energy consumption can be further reduced. Thereby achieving the effects of rapidly improving the heating speed of the heating area and the heat preservation treatment effect. This is particularly important for small heat treatment furnaces.
Disclosure of Invention
The invention aims to provide a hot air circulating device for strengthening the heating effect of a heat treatment furnace for aluminum alloy products for the heat treatment furnace, and the hot air circulating device can effectively improve the air speed of a heating area, thereby improving the temperature rising speed of a heated workpiece in the heating area of a rotary furnace and further improving the working efficiency of the heat treatment furnace.
The device mainly comprises an axial flow fan (1), an air duct (2), a furnace body shell (3), a burner (4), a workpiece supporting frame (5) and an air baffle plate (8), and the specific structure of the device is shown in attached figures 1-4.
As shown in the attached figure 2, the device still uses a rotary aluminum alloy product heat treatment furnace as main equipment and mainly comprises an axial flow fan (1), an air duct (2), a furnace body shell (3), a burner (4), a workpiece supporting frame (5) and an air isolating plate (8), wherein the axial flow fan (1) is arranged at the upper part in the heat treatment furnace, the burner (4) is arranged at the lateral upper part of the axial flow fan (1), the air duct (2) is positioned at the lower part of the axial flow fan and vertically hung and fixed on an upper cover of the furnace body shell (3), the lower edge of the air duct (2) keeps a certain distance from the bottom of the heat treatment furnace, and the central lines of the axial flow fan (1) and the air duct (2) and the central line of the heat treatment furnace are positioned on the same vertical central line; the furnace body shell (3) is characterized in that the workpiece supporting frames (5) are uniformly distributed along the circumferential direction of the furnace body shell (3), the bottom end of each workpiece supporting frame (5) is vertically fixed on the furnace bottom of the rotary heat treatment furnace, each workpiece supporting frame (5) is vertically provided with a wind isolating plate (8) made of a heat-resistant material, and the height of each wind isolating plate (8) is parallel and level to that of the workpiece supporting frame (5).
Particularly, the lower part of the cylinder wall of the air duct (2) is separately provided with a heating area air outlet (6) with a downward opening, the heating area air outlet (6) is a rectangular opening without a bottom edge, the distance H between the top edge of the rectangular opening and the bottom edge plane of the air duct (2) is 300-700 mm, the distance H between the top edge of the rectangular opening and the bottom edge plane of the heat treatment furnace is 600-1100 mm, the size of the opening is one fourth to one sixth of the perimeter of the air duct (2), namely the part corresponding to the β angle shown in figure 4, β is 60-90 degrees, the area corresponding to the heating area air outlet (6) is the heating area of the workpiece, the bottom edge of the air duct (2) outside the heating area air outlet (6) is directly opposite to the heat preservation area of the heat treatment furnace, the bottom edge of the air duct (2) in the heat preservation area is 300mm away from the bottom edge plane of the heat treatment furnace to form the heat preservation area air outlet (7), and;
therefore, the circulating air in the heat treatment furnace is greatly changed by the two air outlets with different sizes, the opening position of the heating area air outlet (6) is higher, the flow rate of hot air is high, the opening position of the heat preservation area air outlet (7) is lower, and the air outlet speed is low. After the air partition plate is installed, hot air enters the heating area or the heat preservation area and then quickly rises along a vertical channel formed by the air partition plate, so that the heating speed of circulating air in the furnace is achieved, and the energy consumption is reduced.
When the device works, air is heated by flame sprayed by the burners (4) to rapidly rise in temperature to form hot air, then the hot air flows from top to bottom along the cavity of the inner wall of the air duct (2) under the action of the axial flow fan (1), reaches the lower part of the air duct (2), flows out of the cavity of the inner wall of the air duct (2) through the heating zone air outlet (6) and the heat preservation zone air outlet (7), enters a heating zone or a heat preservation zone defined by the outer wall of the air duct (2) and the inner wall of the furnace body shell (3), heats workpieces on the workpiece supporting frames (5) from bottom to top, emits heat and rises to the top of the furnace body, is reheated by the burners (4) arranged at the upper part of the axial flow fan (1) and enters the next cycle, each workpiece supporting frame is provided with a wind partition plate (8), and each workpiece supporting frame is partitioned into relatively independent hot air circulation unit channels by the wind partition plates (8, therefore, the hot air is ensured to rapidly rise along each relatively independent hot air circulation unit channel, turbulence is eliminated, and the hot air is really optimized and utilized.
In conclusion, the device takes a rotary aluminum alloy product heat treatment furnace as main equipment and is characterized by mainly comprising an axial flow fan (1), an air duct (2), a furnace body shell (3), a burner (4), a workpiece supporting frame (5) and an air isolating plate (8), wherein the axial flow fan (1) is arranged at the upper part in the heat treatment furnace, the burner (4) is arranged at the lateral upper part of the axial flow fan (1), the air duct (2) is positioned at the lower part of the axial flow fan and vertically hung and fixed on an upper cover of the furnace body shell (3), the lower edge of the air duct (2) keeps a certain distance from the furnace bottom of the heat treatment furnace, and the central lines of the axial flow fan (1) and the air duct (2) and the central line of the heat treatment furnace are positioned on the same vertical central line; the furnace body shell (3) is characterized in that the workpiece supporting frames (5) are uniformly distributed along the circumferential direction of the furnace body shell (3), the bottom end of each workpiece supporting frame (5) is vertically fixed on the furnace bottom of the rotary heat treatment furnace, each workpiece supporting frame (5) is vertically provided with a wind isolating plate (8) made of a heat-resistant material, and the height of each wind isolating plate (8) is parallel and level to that of the workpiece supporting frame (5).
In particular: the lower part of the cylinder wall of the air duct (2) is separately provided with a heating area air outlet (6) with a downward opening, the heating area air outlet (6) is a rectangular opening without a bottom edge, the distance H between the top edge of the rectangular opening and the bottom edge plane of the air duct (2) is 300-700 mm, the distance H between the top edge of the rectangular opening and the bottom edge plane of the heat treatment furnace is 600-1100 mm, the size of the opening is one fourth to one sixth of the perimeter of the air duct (2), and the bottom edge of the air duct (2) outside the heating area air outlet (6) is 300-400mm away from the bottom edge plane of the heat treatment furnace.
The device has the advantages that:
(1) the structure is relatively simple, the implementation is easy, and the function division can be realized only by arranging different openings on the air duct;
(2) the effect is outstanding. Obviously improves the air speed of the heating area, and can achieve the required heating effect by adopting lower circulating air volume.
Drawings
FIG. 1 is a schematic view of a wind velocity field and air outlets of a circulating air system of a heat treatment furnace;
FIG. 2 is a schematic structural view of the apparatus;
FIG. 3 is a schematic view showing the air duct structure and the height of the outlet of the heating zone;
fig. 4 is a schematic view of the position of the air outlet of the heating area along the circumferential direction.
In the attached drawing, 1 is an axial flow fan, 2 is an air duct, 3 is a furnace body shell, 4 is a burner, 5 is a workpiece supporting frame, 6 is a heating area air outlet, 7 is a heat preservation area air outlet, and 8 is an air baffle.
Detailed Description
The following examples are given in connection with the accompanying drawings to further illustrate the embodiments of the present device.
Example 1. As shown in fig. 2 and 3, the device uses a rotary aluminum alloy product heat treatment furnace as main equipment, and is characterized in that the device mainly comprises an axial flow fan (1), an air duct (2), a furnace body shell (3), a burner (4), a workpiece supporting frame (5) and an air baffle (8), wherein the axial flow fan (1) is arranged at the upper part in the heat treatment furnace, the burner (4) is arranged at the side upper part of the axial flow fan (1), the air duct (2) is arranged at the lower part of the axial flow fan and is vertically hung and fixed on an upper cover of the furnace body shell (3), and the central lines of the axial flow fan (1) and the air duct (2) and the central line of the heat treatment furnace are positioned on the same vertical central line; the plurality of workpiece supporting frames (5) are uniformly distributed along the circumferential direction of the furnace body shell (3), the bottom end of each workpiece supporting frame (5) is vertically fixed on the furnace bottom of the rotary heat treatment furnace, each workpiece supporting frame (5) is vertically provided with a wind isolation plate (8) made of a heat-resistant material, the height of each wind isolation plate (8) is flush with that of each workpiece supporting frame (5), and the workpiece supporting frames (5) share 12 rows, so that 12 wind isolation plates (8) are arranged.
In particular: the lower part of the cylinder wall of the air duct (2) is separately provided with a rectangular opening with an opening downward and no bottom edge, the distance H between the top edge of the rectangular opening and the bottom edge plane of the air duct (2) is 300mm, the distance H between the top edge of the rectangular opening and the bottom edge plane of the heat treatment furnace is 600mm, the size of the opening is one sixth of the perimeter of the air duct (2), and the bottom edge of the air duct (2) except the heating zone air outlet (6) is 300mm from the bottom edge plane of the air duct.
Example 2. The structure of the device is basically the same as that of the embodiment 1, wherein the distance H between the top edge of the air outlet (6) of the heating area and the bottom edge plane of the air guide cylinder (2) is 400mm, the distance H between the top edge of the air outlet (6) of the heating area and the bottom edge plane of the heat treatment furnace is 800mm, the size of the opening is one fourth of the perimeter of the air guide cylinder (2), the distance between the bottom edge of the air guide cylinder (2) of the heat preservation area and the bottom edge plane of the heat treatment furnace is 400mm, the workpiece supporting frames (5) share 16 rows, and therefore 16 air partition plates (8.
The heating requirement can be met through practical engineering verification, the heat treatment furnace can reach the temperature of 230 ℃ within 37min, the size of the equipment is reduced by 20%, the capacity of the circulating fan is reduced by 15-20%, the energy consumption is reduced by 20-25%, and the requirement of temperature uniformity within +/-5 ℃ can be met. The invention has good use effect.
Claims (2)
1. A hot air circulating device for strengthening the heating effect of an aluminum alloy product heat treatment furnace is characterized by mainly comprising a rotary aluminum alloy product heat treatment furnace, and is characterized in that the device mainly comprises an axial flow fan (1), an air duct (2), a furnace body shell (3), a burner (4), a workpiece supporting frame (5) and an air baffle plate (8), wherein the axial flow fan (1) is arranged at the upper part in the heat treatment furnace, the burner (4) is arranged at the side upper part of the axial flow fan (1), the air duct (2) is arranged at the lower part of the axial flow fan and is vertically hung and fixed on an upper cover of the furnace body shell (3), the central lines of the axial flow fan (1) and the air duct (2) and the central line of the heat treatment furnace are positioned on the same vertical central line, the lower edge of the air duct (2) keeps a certain distance from the bottom of the heat treatment furnace, a plurality of workpiece supporting frames (5) are uniformly distributed along the circumferential direction, the bottom end of each workpiece supporting frame (5) is vertically fixed on the furnace bottom of the rotatable heat treatment furnace, an air partition plate (8) made of heat-resistant materials is vertically arranged on each workpiece supporting frame (5), and the height of the air partition plate (8) is flush with that of the workpiece supporting frame (5).
2. The hot air circulation device for enhancing the heating effect of the aluminum alloy product heat treatment furnace as claimed in claim 1, wherein the lower portion of the wall of the air duct (2) in the device is provided with a heating zone air outlet (6) with a downward opening, the heating zone air outlet (6) is a rectangular opening without bottom edge, the distance H between the top edge of the rectangular opening and the bottom edge plane of the air duct (2) is 300-700 mm, the distance H between the top edge of the rectangular opening and the bottom edge plane of the heat treatment furnace is 600-1100 mm, the size of the opening is one fourth to one sixth of the perimeter of the air duct (2), and the bottom edge of the air duct (2) outside the heating zone air outlet (6) is 300-400mm away from the bottom edge plane of the heat treatment furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921714745.9U CN211079253U (en) | 2019-10-14 | 2019-10-14 | Hot air circulating device for enhancing heating effect of aluminum alloy product heat treatment furnace |
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| CN201921714745.9U CN211079253U (en) | 2019-10-14 | 2019-10-14 | Hot air circulating device for enhancing heating effect of aluminum alloy product heat treatment furnace |
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| CN211079253U true CN211079253U (en) | 2020-07-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110629007A (en) * | 2019-10-14 | 2019-12-31 | 沈阳东大三建工业炉制造有限公司 | A hot air circulation device for strengthening the heating effect of a heat treatment furnace for aluminum alloy products |
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- 2019-10-14 CN CN201921714745.9U patent/CN211079253U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110629007A (en) * | 2019-10-14 | 2019-12-31 | 沈阳东大三建工业炉制造有限公司 | A hot air circulation device for strengthening the heating effect of a heat treatment furnace for aluminum alloy products |
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