A degassing and unloading device

Abstract

The present application relates to powder processing technical field, especially to a kind of degassing unloading device, including buffer bin, air bag is arranged in buffer bin, and the cavity of variable size is formed between buffer bin and air bag;When the volume of cavity is larger, air bag is compressed, and the volume in air bag is smaller;It also includes the exhaust filtering device for communicating the outside of degassing unloading device and the inner cavity of air bag.The exhaust filtering device includes first communication pipe, and the end of first communication pipe is connected with microporous filter stick, and the microporous filter stick is located in the inside of air bag.The degassing unloading device of the present application can remove the gas contained in fluffy ultra-fine powder, facilitate the packaging and transportation of ultra-fine powder, has the advantages of simple structure, convenient operation, low manufacturing cost, and is especially suitable for the degassing treatment of fluffy ultra-fine powder with relatively light specific gravity.

Description

Technical Field

[0001] This invention relates to the field of powder processing technology, and in particular to a degassing and unloading device. Background Technology

[0002] Unloading devices, as auxiliary components of collection systems, are widely used in the crushing industry for collecting materials. They transfer and package the crushed and collected materials from the collection equipment.

[0003] In the powder processing industry, some materials, after ultrafine grinding, have a high air content, which negatively impacts material collection, packaging, and storage. This is especially true for flammable materials, which require minimizing internal air content before packaging to prevent spontaneous combustion. To address this issue, conventional practice involves adding vacuum packaging machines or other equipment below the unloading device. However, this significantly increases equipment procurement costs, control complexity, and floor space required.

[0004] Therefore, designing a degassing and unloading device has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a degassing and unloading device that can remove the gas contained in the fluffy ultrafine powder, which facilitates the packaging and transportation of the ultrafine powder. It has the advantages of simple structure, convenient operation and low manufacturing cost, and is especially suitable for the degassing treatment of fluffy ultrafine powder with relatively light specific gravity.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0007] A degassing and unloading device includes a buffer chamber with an air bladder inside, forming a chamber with a variable volume between the buffer chamber and the air bladder; when the volume of the chamber increases, the air bladder is compressed, and the volume inside the air bladder decreases; it also includes an exhaust filter for connecting the outside of the degassing and unloading device and the inner cavity of the air bladder.

[0008] As an improvement, the exhaust filtration device includes a first connecting pipe, the end of which is connected to a microporous filter rod, which is located inside the air bladder.

[0009] As an improvement, the other end of the first connecting pipe is connected to a first exhaust valve and a first blowing valve, which are located outside the degassing and unloading device.

[0010] As an improvement, the buffer compartment is provided with a second connecting pipe on its side wall that communicates with the chamber.

[0011] As an improvement, the end of the second connecting pipe is connected to a second exhaust valve and a second blowing valve, which are located outside the degassing and unloading device.

[0012] As an improvement, the buffer compartment is provided with an air hammer on its side wall.

[0013] As an improvement, the upper and lower ends of the buffer compartment are provided with connecting flanges, and the upper and lower ends of the airbag are provided with annular flanges of a size that are adapted to the connecting flanges. The two annular flanges are respectively fixed to the outside of the two connecting flanges.

[0014] As an improvement, the upper end of the buffer compartment is provided with a receiving pipe, which is connected to the inner cavity of the airbag; the receiving pipe is provided with an upper unloading valve.

[0015] As an improvement, the lower end of the buffer compartment is connected to a discharge pipe, and the discharge pipe is equipped with a discharge valve.

[0016] The present invention adopts the above technical solution and has the following advantages compared with the prior art:

[0017] This invention discloses a degassing and unloading device that can remove more than 90% of the gas contained in ultrafine powder, and compress the volume of ultrafine powder with a relatively light specific gravity to 50% to 60% of its original volume, with high compression efficiency; it facilitates the packaging and transportation of ultrafine powder, and has the advantages of simple structure, convenient operation, and low manufacturing cost, and is especially suitable for the degassing treatment of light and fluffy ultrafine powder.

[0018] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a degassing and unloading device according to the present invention;

[0020] Wherein: 1-Buffer chamber, 2-Airbag, 3-Cavity, 4-First connecting pipe, 5-Microporous filter rod, 6-Four-way valve, 7-First exhaust valve, 8-First air blowing valve, 9-Second connecting pipe, 10-Second exhaust valve, 11-Second air blowing valve, 12-Receiving pipe, 13-Discharge pipe, 14-Connecting flange, 15-Annular flange, 16-Upper discharge valve, 17-Lower discharge valve, 18-Air hammer, 19-First pressure gauge, 20-Second pressure gauge, 21-Powder collecting device. Detailed Implementation

[0021] For ease of explanation rather than limitation, the side of the degassing and unloading device closer to the center of the air bladder is defined as the inside, and the opposite side is defined as the outside.

[0022] Example

[0023] like Figure 1 As shown, a degassing and unloading device includes a buffer chamber 1, inside which is an air bladder 2, forming a chamber 3 with a variable volume between the buffer chamber 1 and the air bladder 2. The air bladder 2 and the buffer chamber 1 are adapted in size and shape. When the volume of the chamber 3 increases, the air bladder 2 is compressed, and the volume inside the air bladder 2 decreases; it also includes an exhaust filter device for connecting the outside of the degassing and unloading device and the inside of the air bladder 2.

[0024] like Figure 1 As shown, the lower end of the buffer bin 1 is conical, and an air hammer 18 is provided on the conical sidewall of the lower end of the buffer bin 1. In this embodiment, preferably, the air hammer 18 is a hopper air hammer. Both the upper and lower ends of the buffer bin 1 are provided with annular connecting flanges 14, and both the upper and lower ends of the airbag 2 are provided with annular flanges 15 whose dimensions are adapted to the connecting flanges 14. The two annular flanges 15 are respectively fixed to the outside of the two connecting flanges 14. The upper end of the buffer bin 1 is provided with a receiving pipe 12, which is connected to the inner cavity of the airbag 2; an upper discharge valve 16 is provided on the receiving pipe 12. The lower end of the buffer bin 1 is connected to a discharge pipe 13, which is connected to the inner cavity of the airbag 2, and a lower discharge valve 17 is provided on the discharge pipe 13.

[0025] Specifically, the lower end of the receiving pipe 12 is provided with a connecting flange 14. The annular flange 15 at the upper end of the airbag 2 is located between the connecting flange 14 at the upper end of the buffer chamber 1 and the connecting flange 14 at the lower end of the receiving pipe 12. The two connecting flanges 14 are fixedly connected by fasteners. The upper end of the discharge pipe 13 is provided with a connecting flange 14. The annular flange 15 at the lower end of the airbag 2 is located between the connecting flange 14 at the lower end of the buffer chamber 1 and the connecting flange 14 at the upper end of the discharge pipe 13. The two connecting flanges 14 are fixedly connected by fasteners. Preferably, the fasteners are a combination of bolts and nuts. With the above structural design, the annular flanges 15 at both ends of the airbag 2 are fixed to the connecting flanges 14 at both ends of the buffer chamber 1, and the clamping between the annular flanges 15 and the connecting flanges 14 is achieved by the fasteners, thus sealing the airbag 2 and the buffer chamber 1, making the chamber 3 a sealed chamber. When not in use, the airbag 2 is in close contact with the inner wall of the buffer chamber 1.

[0026] like Figure 1As shown, the buffer chamber 1 has a second connecting pipe 9 on its side wall that communicates with the chamber 3; the exhaust filtration device includes a first connecting pipe 4, the end of which is connected to a microporous filter rod 5, and the other end of the microporous filter rod 5 is a closed end. The microporous filter rod 5 is located inside the airbag 2. Specifically, the first connecting pipe 4 is fixed to and passes through the receiving pipe 12. The end of the first connecting pipe 4 is bent downwards and connected to the microporous filter rod 5; the microporous filter rod 5 is vertically arranged and located in the middle of the airbag 2. The microporous filter rod 5 is a commercially available standard product, and its structure will not be described in detail. The interior of the airbag 2 is connected to the external atmosphere through the microporous filter rod 5 and the first connecting pipe 4. When gas is filled into the chamber 3, the volume of the chamber 3 increases, the airbag 2 is compressed, and the gas inside the airbag 2 can be discharged through the microporous filter rod 5 and the first connecting pipe 4. When the airbag 2 needs to be restored, there are two methods. First, air is injected into the airbag 2 through the first connecting pipe 4 and the microporous filter rod 5, causing the airbag 2 to gradually deflate. The volume of the chamber 3 decreases, and the gas inside the chamber 3 is discharged through the second connecting pipe 9. After deflation, the airbag 2 will adhere tightly to the inner wall of the buffer chamber 1. Second, a vacuum is created in the chamber 3 through the second connecting pipe 9, making the gas pressure inside the chamber 3 lower than the gas pressure inside the airbag 2. The airbag 2 gradually deflates, and external air enters the airbag 2 through the first connecting pipe 4 and the microporous filter rod 5 until the airbag 2 adheres tightly to the inner wall of the buffer chamber 1. Both methods can achieve the deflation of the airbag 2. In this embodiment, the first method is preferred for deflation of the airbag 2.

[0027] When air is pumped into the airbag 2 through the first connecting tube 4 and the microporous filter rod 5, the blocked micropores on the microporous filter rod 5 will be blown open in the opposite direction, which has the function of cleaning the microporous filter rod 5.

[0028] In this preferred embodiment, the end of the first connecting pipe 4 is connected to a first exhaust valve 7, a first air blowing valve 8, and a first pressure gauge 19 via a four-way connector 6. All three valves are located outside the degassing and unloading device. The end of the second connecting pipe 9 is connected to a second exhaust valve 10, a second air blowing valve 11, and a second pressure gauge 20 via a four-way connector 6. All three valves are located outside the degassing and unloading device. The first exhaust valve 7, the first air blowing valve 8, the second exhaust valve 10, and the second air blowing valve 11 are all solenoid valves.

[0029] Before using the degassing and unloading device, the receiving pipe 12 needs to be installed on the discharge port at the lower end of the powder collecting device 21. Open the first blowing valve 8 and the second exhaust valve 10, and close the first exhaust valve 7 and the second blowing valve 11. Inflate the airbag 2 through the first blowing valve 8, increasing the volume of the airbag 2 and decreasing the volume of the chamber 3. The gas in the chamber 3 is discharged sequentially through the second connecting pipe 9 and the second exhaust valve 10. Observe the pressure inside the airbag 2 through the first pressure gauge 19. When the pressure inside the airbag 2 reaches 0.1-0.2 MPa, maintain this pressure for 5-10 seconds to make the airbag 2 fit as close as possible to the inner wall of the buffer chamber 1. Then stop inflating the airbag 2.

[0030] In use, first open the upper discharge valve 16 and close the lower discharge valve 17. The loose powder in the powder collection device 21 falls into the buffer bin 1 through the receiving pipe 12. After the buffer bin 1 is filled with powder, close the upper discharge valve 16.

[0031] Then, the air contained in the micro-powder inside the airbag 2 is expelled. The first exhaust valve 7 and the second air-blowing valve 11 are opened, and the first air-blowing valve 8 and the second exhaust valve 10 are closed. Air is injected into the chamber 3 between the buffer chamber 1 and the airbag 2 through the second air-blowing valve 11, increasing the volume of the chamber 3 and compressing the airbag 2. The volume of the airbag 2 decreases, and the air contained in the micro-powder inside the airbag 2 is collected through the microporous filter rod 5 and discharged sequentially through the first connecting pipe 4, the four-way valve 6, and the first exhaust valve 7. The pressure inside the chamber 3 is observed through the second pressure gauge 20. When the pressure inside the chamber 3 reaches 0.1–0.2 MPa, this pressure is maintained for 10–20 seconds to expel as much air as possible from the micro-powder inside the airbag 2. This process removes 90% of the gas contained in the micro-powder.

[0032] Finally, discharge the micro powder and reset the airbag 2. Open the bottom discharge valve 17 and start the air hammer 18 to discharge the micro powder in the airbag 2 through the discharge pipe 13. The micro powder will be collected or packaged. After all the micro powder in the airbag 2 has been discharged, close the bottom discharge valve 17 and the air hammer 18. Open the first air blowing valve 8 and the second exhaust valve 10, and close the first exhaust valve 7 and the second air blowing valve 11. Inflate the airbag 2 through the first air blowing valve 8, so that the volume of the airbag 2 increases and the volume of the chamber 3 decreases. The gas in the chamber 3 is discharged sequentially through the second connecting pipe 9 and the second exhaust valve 10. Observe the pressure inside the airbag 2 through the first pressure gauge 19. When the pressure inside the airbag 2 reaches 0.1-0.2 MPa, maintain this pressure for 5-10 seconds to make the airbag 2 fit as close as possible to the inner wall of the buffer chamber 1.

[0033] Following the steps described above, the next work cycle is performed, continuously degassing the micro-powder entering the air bladder 2. Alternatively, this degassing and unloading device can also be used independently of the powder collection device 21 without being installed on it.

[0034] In summary, the degassing and unloading device of the present invention can remove more than 90% of the gas contained in ultrafine powder, and the volume of ultrafine powder with a relatively light specific gravity can be compressed to 50% to 60% of the original volume, with high compression efficiency; it facilitates the packaging and transportation of ultrafine powder, and has the advantages of simple structure, convenient operation and low manufacturing cost.

[0035] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A deaeration dump device characterized by: The utility model provides a kind of gas discharging device, comprising buffer bin (1), air bag (2) is equipped inside buffer bin (1), and chamber (3) with variable volume is formed between buffer bin (1) and air bag (2);When the volume of chamber (3) is increased, air bag (2) is compressed, and the volume inside air bag (2) is reduced;Further comprising exhaust filter device for connecting the inside of air bag (2) and the outside of gas discharging device; The exhaust filter device includes first communication pipe (4), and the end of first communication pipe (4) is connected with microporous filter stick (5), and the microporous filter stick (5) is located inside air bag (2); The other end of first communication pipe (4) is connected with first exhaust valve (7) and first air blowing valve (8) through four-way (6), and first exhaust valve (7) and first air blowing valve (8) are located outside gas discharging device; Air is filled into chamber (3) between buffer bin (1) and air bag (2) through second air blowing valve (11), so that the volume of chamber (3) is increased and air bag (2) is compressed, the volume of air bag (2) is reduced, and the air contained in the micropowder in air bag (2) is collected through microporous filter stick (5) and discharged in turn through first communication pipe (4), four-way (6) and first exhaust valve (7);The pressure inside chamber (3) is observed through second pressure gauge (20), and the air contained in the micropowder in air bag (2) is discharged as much as possible.

2. The degassing dump device of claim 1, wherein: Second communication pipe (9) is arranged on the side wall of buffer bin (1) and connected with chamber (3).

3. The degassing dump device of claim 2, wherein: Second exhaust valve (10) and second air blowing valve (11) are connected with the end of second communication pipe (9), and second exhaust valve (10) and second air blowing valve (11) are located outside gas discharging device.

4. The degassing dump device of claim 1, wherein: Air hammer (18) is arranged on the side wall of buffer bin (1).

5. The degassing dump device of any one of claims 1 to 4, wherein: Connecting flange (14) is arranged on the upper end and lower end of buffer bin (1), and annular flange (15) with a size matching with connecting flange (14) is arranged on the upper end and lower end of air bag (2), and the two annular flanges (15) are respectively fixed outside the two connecting flanges (14).

6. The degassing dump device of claim 5, wherein: Material receiving pipe (12) is arranged on the upper end of buffer bin (1) and connected with the inside of air bag (2), and upper discharging valve (16) is arranged on material receiving pipe (12).

7. The degassing dump device of claim 5, wherein: Lower discharging valve (17) is arranged on dropping pipe (13) connected with the lower end of buffer bin (1).

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