Aluminum ash ball-milling equipment with good dust collection effect

Abstract

The aluminum ash ball-milling equipment with the good dust collection effect comprises a hopper, a conveying belt and a ball mill, the conveying belt conveys aluminum materials falling from the hopper to the ball mill for ball-milling treatment, the aluminum ash ball-milling equipment further comprises a dust collection fan, a dust collection pipe and at least two steering elbows, the dust collection fan is connected with the dust collection pipe, the dust collection pipe horizontally extends to the upper side of the hopper, and the steering elbows are connected with the conveying belt. The dust collection fan is connected with the top of the hopper in a vertically downward mode after being steered by the first steering elbow and is connected with the top of the hopper in a vertically downward mode after being steered by the second steering elbow, the dust collection fan sucks raised dust in the hopper through the dust collection pipe, the two steering elbows are obtuse-angle steering elbows, and the dust collection pipe is steered by the first steering elbow and then obliquely and downwards extends to the position over the hopper. And the second steering elbow is vertically downwards connected with the top of the hopper. Due to the fact that the portion, close to the top of the hopper, of the dust collection pipe does not adopt a vertical steering elbow with high resistance but adopts an obtuse angle steering elbow with low resistance, dust collection resistance in the dust collection process is remarkably reduced, dust collection efficiency is high, and the dust collection effect is good.

Description

Aluminum ash ball mill equipment with good dust extraction effect Technical Field

[0001] This utility model relates to aluminum ash ball milling equipment, specifically to aluminum ash ball milling equipment with good dust collection effect. Background Technology

[0002] Aluminum ash ball milling equipment is common in aluminum product factories. Besides the ball mill, it typically includes a hopper and a conveyor belt. The hopper feeds aluminum ash onto the conveyor belt, which then transports the ash to the ball mill for grinding. Because aluminum ash is lightweight, it easily generates dust in the hopper during feeding. To prevent this dust from spreading to the environment, factories usually install dust extraction fans. Considering space utilization and noise control, these fans are often located in other workshops or dedicated areas, connected to the top of the hopper via a suction pipe to remove the dust. Ideally, the suction pipe should extend horizontally directly above the hopper, then turn vertically downwards via a bend to connect to the top of the hopper, ensuring good dust extraction. However, in practice, due to space constraints, the suction pipe sometimes cannot extend horizontally directly above the hopper. Instead, it extends horizontally to the side above the hopper, then needs to be turned laterally via a first vertical bend to reach the top of the hopper, and finally turn vertically downwards via a second vertical bend to connect to the top of the hopper. While this method effectively overcomes space limitations, the suction pipe near the hopper has two vertical bends, resulting in high suction resistance, low suction efficiency, and poor suction performance. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an aluminum ash ball mill with good dust collection effect. When the dust collection pipe extends from the outside to the top of the hopper and is connected to the top of the hopper through an elbow, the dust collection resistance is small.

[0004] The inventors discovered that replacing the first vertical turning bend with an obtuse-angled elbow could reduce suction resistance to some extent, but the suction effect was still not ideal. After further research, the inventors abandoned the traditional design where the suction pipe extends horizontally to the top of the hopper and then vertically downwards to connect to the top of the hopper. They proposed a new design: replacing the second vertical turning bend with an obtuse-angled elbow as well. The suction pipe extends horizontally to the upper side of the hopper, first turning downwards at an angle via the first obtuse-angled elbow to reach the top of the hopper, and then turning vertically downwards to connect to the top of the hopper using the second obtuse-angled elbow. The advantage of this design is that the section of the suction pipe near the top of the hopper does not use a high-resistance vertical elbow, but instead uses a low-resistance obtuse-angled elbow, significantly reducing suction resistance during the suction process, resulting in higher suction efficiency and better suction effect.

[0005] To solve the above-mentioned technical problems, this utility model includes a hopper, a conveyor belt, and a ball mill. The conveyor belt transports aluminum material falling from the hopper to the ball mill for ball milling. It also includes a dust extraction fan, a dust extraction pipe, and at least two turning bends. The dust extraction fan is connected to the dust extraction pipe, which extends horizontally to the upper side of the hopper, turns at the first turning bend, extends directly above the hopper, and turns vertically downwards at the second turning bend to connect to the top of the hopper. The dust extraction fan sucks away the dust in the hopper through the dust extraction pipe. Both turning bends are obtuse angle turning bends. After turning at the first turning bend, the dust extraction pipe extends obliquely downwards to directly above the hopper, and turns vertically downwards at the second turning bend to connect to the top of the hopper.

[0006] Furthermore, the suction pipe includes a horizontal section, an inclined section, and a vertical section. The suction fan is connected to the beginning of the horizontal section, the end of the horizontal section is connected to the beginning of the inclined section via a first turning bend, the end of the inclined section is connected to the beginning of the vertical section via a second turning bend, and the end of the vertical section is connected to the top of the hopper.

[0007] Furthermore, the vertical section has a first tapering portion at its beginning, which is narrower near the second obtuse angle bend than away from it. The inclined section has a first widening portion at its end, which is wider away from the second obtuse angle bend than near it.

[0008] Furthermore, the inclined section has a second tapering portion at its first end, which is narrower near the first turning bend than away from the first turning bend, and the horizontal section has a second widening portion at its end, which is wider away from the first obtuse-angle turning bend than near the first obtuse-angle turning bend.

[0009] Furthermore, the vacuum cleaner tube has two layers, inner and outer, that fit together.

[0010] Furthermore, shock-absorbing material is filled between the inner and outer layers of the vacuum tube.

[0011] Furthermore, an electric heating wire is installed at the air inlet of the suction pipe to heat the air entering the pipe.

[0012] Furthermore, a compressed air nozzle facing the heating wire is also provided at the air inlet of the vacuum pipe.

[0013] Both turning bends in this aluminum ash ball mill are obtuse-angle turning bends. The suction pipe, after turning at the first turning bend, extends downwards at an angle to directly above the hopper, and then turns vertically downwards after turning at the second bend, connecting to the top of the hopper. Because the section of the suction pipe near the top of the hopper does not use a high-resistance vertical turning bend, but instead employs an all-low-resistance obtuse-angle turning bend, the suction resistance during the suction process is significantly reduced, resulting in higher suction efficiency and better suction effect. Attached Figure Description

[0014] Figure 1 is a schematic diagram of an aluminum ash ball mill.

[0015] Figure 2 is a cross-sectional view of the end of the second inclined section and the second vertical section. The heating wire is not shown in the figure.

[0016] Figure 3 is a cross-sectional view of the first end of the second inclined segment and the end of the horizontal segment.

[0017] Figure 4 is a cross-sectional view of the horizontal section and the vacuum hose mounting bracket. The vacuum hose in the figure is drawn in a broken manner. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to specific embodiments.

[0019] Figure 1 shows a ball mill for aluminum ash with good dust collection. It includes a frame 1 and a hopper 2 mounted on the frame 1. The hopper 2 has a feed inlet 21 on its side and a discharge outlet (not shown in the figure due to perspective) at its bottom. A vibrating feeder 3 is installed at the discharge outlet, with its feed section 31 facing upwards towards the discharge outlet of the hopper 2. The ball mill includes an aluminum ash conveying mechanism 4 and a ball mill 5. The conveying mechanism 4 includes a conveyor belt mounting frame 41, a rotating shaft 42 mounted on the frame 41, and a conveyor belt 43 fitted around the shaft 42. It also includes a drive motor 44 that drives the shaft 42. The rear end of the conveyor belt 43 is located below the discharge section 32 of the vibrating feeder 3, and the front end extends to the feed inlet of the ball mill 5. The operator feeds aluminum ash into the hopper 2 through the feed inlet 21, using the hopper 2 to hold the ash, and then starts the vibrating feeder 3, the drive motor 44, and the ball mill 5. Under the influence of gravity, the aluminum ash at the bottom of hopper 2 falls from the discharge port onto the vibrating feeder 3. The vibrating feeder 3 uses vibration to evenly transport the material falling onto the feeder 2 onto the conveyor belt 43 below. During this process, as the vibrating feeder 3 continues to work, other aluminum ash in hopper 2 also continues to fall from the discharge port onto the vibrating feeder 3 under the influence of gravity, continuing to supply the vibrating feeder 3. The rear end of the conveyor belt 43 receives the aluminum ash conveyed by the vibrating feeder 3, and the drive motor 44 drives the conveyor belt 43 to send the received aluminum ash forward to the ball mill 5, where the ball mill 5 performs ball milling treatment on the aluminum ash.

[0020] As shown in Figure 1, when aluminum ash at the bottom of hopper 2 falls from the discharge port 22 of hopper 2, aluminum ash in other positions inside hopper 2 will also fall down under the action of gravity. During this process, aluminum ash, due to its light texture, is easily carried up by the airflow inside hopper 2, thus forming dust inside hopper 2. To prevent the dust inside hopper 2 from spreading to the outside environment, a dust suction hood 23 with a narrow top and wide bottom is provided at the top of hopper 2. This aluminum ash ball mill equipment is also equipped with a dust suction fan 6, a dust suction pipe mounting bracket 7, and a dust suction pipe 8. The dust suction pipe 8 is installed on the ceiling (not shown in the figure) via the dust suction pipe mounting bracket 7. It includes a first vertical section 81, a first inclined section 82, a horizontal section 83, a second inclined section 84, and a second vertical section 85. This aluminum ash ball mill equipment also includes a first turning bend 801 on the air outlet side, a second turning bend 802 on the air outlet side, a first turning bend 803 on the air inlet side, and a second turning bend 804 on the air inlet side. These four are all obtuse angle turning bends. The vacuum cleaner fan 6 is connected to the first vertical section 81, at its beginning 811. The end 812 of the first vertical section 81 connects to the first inclined section 82, at its beginning 821, via a first turning bend on the air outlet side (connected by 801), achieving the first turn of the vacuum cleaner pipe 8. The end 822 of the first inclined section 82 tilts upwards and connects to the first horizontal section 83, at its beginning 831, via a second turning bend on the air outlet side (connected by 802), achieving the second turn of the vacuum cleaner pipe 8. The end 832 of the horizontal section 83 extends horizontally to the upper side of the hopper 2 and connects to the first inclined section 84, at its beginning 841, via a first turning bend on the air inlet side (connected by 803), achieving the third turn of the vacuum cleaner pipe 8. The end 842 of the second inclined section 84 tilts downwards and extends directly above the hopper 2 and connects to the first vertical section 85, at its beginning 851, via a second turning bend on the air inlet side (connected by 804), achieving the fourth turn of the vacuum cleaner pipe 8. The end 852 of the second vertical section 85 connects vertically downwards to the vacuum hood 23 on top of the hopper 2. The air inlet of the suction pipe 8 is located at the end 852 of the second vertical section 85, and the air outlet of the suction pipe 8 is located at the beginning 811 of the first vertical section 81. After feeding the material, the operator starts the suction fan 6, which sucks away the dust in the hopper 2 through the suction pipe 8. Because the parts of the suction pipe 8 near the top of the hopper 2 (i.e., the end 832 of the horizontal section 83, the second inclined section 84, and the second vertical section 85) do not use vertical turning bends with high resistance, but instead use obtuse-angle turning bends 803 and 804 with low resistance, the suction resistance during the suction process is significantly reduced, resulting in higher suction efficiency and better suction effect.

[0021] Referring to Figures 2 and 3, the first end 851 of the second vertical segment 85 has a first tapered portion 853, which is narrower at the second turning bend 804 on the air inlet side than at the second turning bend 804 on the air inlet side. The last end 842 of the second inclined segment 84 has a first expanding portion 843, which is wider at the second turning bend 804 on the air inlet side than at the second turning bend 804 on the air inlet side. The first end 841 of the second inclined segment 84 has a second tapered portion 844, which is narrower at the first turning bend 803 on the air inlet side than at the first turning bend 803 on the air inlet side. The last end 832 of the horizontal segment 83 has a second expanding portion 834, which is wider at the first turning bend 803 on the air inlet side than at the first turning bend 803 on the air inlet side. As shown in Figure 1, driven by the vacuum cleaner fan 6, an airflow is formed inside the vacuum cleaner pipe 8, flowing from the end 852 of the second vertical section 85 to the beginning 811 of the first vertical section 81. As shown in Figure 2, the airflow first flows upward from the end 852 of the second vertical section 85 to the beginning 851 of the second vertical section 85, passing through the first tapering section 853 of the beginning 851 of the second vertical section 85. During this process, as the pipe diameter gradually decreases, the airflow speed gradually increases accordingly. The airflow leaves the end 851 of the second vertical section 85 at a relatively high speed and enters the second turning bend 804 on the air inlet side, flowing along the second turning bend 804 on the air inlet side to the end 842 of the second inclined section 84. During this process, due to the high airflow speed, eddies or turbulence are not easily generated, thereby effectively reducing energy loss during turning. The airflow within the second turning bend 804 on the air inlet side enters the second inclined section 84 through the first expanding portion 843 at the end 842 of the second inclined section 84. During this process, as the pipe diameter gradually increases, the airflow velocity gradually decreases, allowing it to smoothly enter the second inclined section 84. Similarly, as shown in Figure 3, the airflow velocity increases when passing through the second contraction portion 844, making it less likely to generate eddies or turbulence when passing through the first turning bend 803 on the air inlet side, and gradually decreases when passing through the second expanding portion 834, allowing it to smoothly enter the horizontal section 83.

[0022] See Figures 2, 3 and 4. The vacuum tube 8 includes two nested layers 895 and 896. The inner layer 895 is an airflow channel, and the outer layer 896 is fitted over the inner layer 895. The space between the two is filled with shock-absorbing silicone 897. When the airflow flows in the inner layer 895, the shock-absorbing silicone 897 can effectively absorb vibration, thereby significantly reducing the noise caused by the airflow.

[0023] As shown in Figure 2, a heating wire 855 and a compressed air nozzle 856 facing the heating wire 855 are provided at the end 852 of the second vertical section 85 of the suction pipe 8. This aluminum ash ball mill equipment also includes an air compressor (not shown in the figure) that provides compressed air to the compressed air nozzle 856. When the operator starts the suction fan 6, the heating wire 855 is also started. The heating wire 855 heats the air entering the suction pipe 8, preventing colder outside air from directly entering the suction pipe 8. In this way, the temperature inside the suction pipe 8 is maintained as high as possible above the dew point, effectively preventing condensation from forming inside the suction pipe 8. To keep the heating wire 855 clean and maintain its efficient operation, the operator periodically uses the compressed air nozzle 856 to blow compressed air across the surface of the heating wire 855, removing dust adhering to its surface.

[0024] In a non-preferred embodiment: the first tapering section 853, the first expanding section 843, the second tapering section 844, and the second expanding section 834 can be omitted; the second vertical section 85, the second inclined section 84, and the horizontal section 83 can all be made of conventional cylindrical tubes; and / or the heating wire 855 and the compressed air nozzle 856 can be omitted.

[0025] The above description is merely an embodiment of the present invention and does not limit the scope of patent protection. Any non-substantial changes or substitutions made by those skilled in the art based on the present invention will still fall within the scope of patent protection.

Claims

1. An aluminum ash ball milling device with good dust collection effect, comprising a hopper, a conveyor belt, and a ball mill. The conveyor belt transports aluminum material falling from the hopper to the ball mill for ball milling. It also includes a dust collection fan, a dust collection pipe, and at least two turning bends. The dust collection fan is connected to the dust collection pipe, which extends horizontally to the upper side of the hopper, turns at the first turning bend to extend directly above the hopper, and then turns vertically downwards to connect to the top of the hopper after a second turning bend. The dust collection fan sucks away the dust inside the hopper through the dust collection pipe. Its features are: Both turning bends are obtuse angle turning bends. After turning at the first turning bend, the suction pipe extends downward at an angle to directly above the hopper, and after turning at the second turning bend, it connects vertically downward to the top of the hopper.

2. The aluminum ash ball milling equipment according to claim 1, characterized in that: The suction pipe includes a horizontal section, an inclined section, and a vertical section. The suction fan is connected to the beginning of the horizontal section. The end of the horizontal section is connected to the beginning of the inclined section via a first turning bend. The end of the inclined section is connected to the beginning of the vertical section via a second turning bend. The end of the vertical section is connected to the top of the hopper.

3. The aluminum ash ball milling equipment according to claim 2, characterized in that: The vertical section has a first tapering portion at its beginning, which is narrower near the second obtuse angle bend than away from it. The inclined section has a first widening portion at its end, which is wider away from the second obtuse angle bend than near it.

4. The aluminum ash ball milling equipment according to claim 2 or 3, characterized in that: The inclined section has a second tapering portion at its first end, which is narrower near the first turning bend than away from the first turning bend. The horizontal section has a second widening portion at its end, which is wider away from the first obtuse-angle turning bend than near the first obtuse-angle turning bend.

5. The aluminum soot ball milling apparatus of claim 1, wherein: The vacuum cleaner hose has two layers, inner and outer, that are nested together.

6. The aluminum ash ball milling equipment according to claim 5, characterized in that: Shock-absorbing material is filled between the inner and outer layers of the vacuum tube.

7. The aluminum soot ball milling apparatus of claim 1, wherein: A heating wire is installed at the air inlet of the suction pipe to heat the air entering the pipe.

8. The aluminum dross ball milling apparatus of claim 7, wherein: A compressed air nozzle is also provided at the air inlet of the vacuum pipe, pointing towards the heating wire.

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