Degassing and discharging device

Abstract

The invention relates to the technical field of powder processing, in particular to a degassing and discharging device which comprises a temporary storage bin, an air bag is arranged in the temporary storage bin, and a cavity with the variable size is formed between the temporary storage bin and the air bag; when the volume of the cavity is increased, the air bag is compressed, and the internal volume of the air bag is decreased; the degassing and discharging device further comprises an exhaust filtering device used for communicating the outside of the degassing and discharging device with the inner cavity of the airbag. The exhaust filtering device comprises a first communicating pipe, the end of the first communicating pipe is connected with a microporous filter stick, and the microporous filter stick is located in the air bag. The degassing and discharging device can remove gas contained in fluffy superfine micro-powder, facilitates packaging and transportation of the superfine micro-powder, has the advantages of being simple in structure, convenient to operate, low in manufacturing cost and the like, and is particularly suitable for degassing treatment of the fluffy superfine micro-powder with low specific gravity.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of powder processing technology, and particularly relates to a degassing and discharging device. BACKGROUND

[0002] The discharging device is widely used in the powder crushing industry as an accessory part of a collecting device. It transfers and packages the crushed and collected materials from the collecting device.

[0003] In the powder processing industry, the air content in the superfine materials is high after superfine crushing, which has adverse effects on the collection, packaging and storage of the materials. Especially for the materials prone to spontaneous combustion, the air content in the materials needs to be reduced to the minimum before packaging so that the materials cannot reach the conditions of spontaneous combustion. In order to solve this problem, the conventional operation is to increase a vacuum packaging machine and other devices below the discharging device, which greatly increases the equipment procurement cost, control complexity coefficient and floor area.

[0004] Therefore, designing a degassing and discharging device becomes a technical problem to be solved by the person skilled in the art. SUMMARY

[0005] The present application aims at solving the above problems, and provides a degassing and discharging device which can remove the gas contained in the fluffy superfine powder, facilitates the packaging and transportation of the superfine powder, has the advantages of simple structure, convenient operation and low manufacturing cost, and is especially suitable for the degassing treatment of the fluffy superfine powder with light specific gravity.

[0006] To solve the above problems, the technical scheme adopted by the present application is as follows: The degassing and discharging device comprises a buffer bin, a gas bag is arranged in the buffer bin, a chamber with variable volume is formed between the buffer bin and the gas bag, when the volume of the chamber increases, the gas bag is compressed, and the volume of the gas bag decreases, and the degassing and discharging device further comprises an exhaust filter device for connecting the outside of the degassing and discharging device and the inner cavity of the gas bag.

[0007] As an improvement, the exhaust filter device comprises a first connecting pipe, the end of the first connecting pipe is connected with a microporous filter stick, and the microporous filter stick is arranged in the inner cavity of the gas bag.

[0008] As an improvement, the other end of the first connecting pipe is connected with a first exhaust valve and a first air blowing valve, and the first exhaust valve and the first air blowing valve are arranged outside the degassing and discharging device.

[0009] As an improvement, a second connecting pipe is arranged on the side wall of the buffer bin and connected with the chamber.

[0010] As an improvement, the end of the second connecting pipe is connected with a second exhaust valve and a second air blowing valve, and the second exhaust valve and the second air blowing valve are arranged outside the degassing and discharging device.

[0011] As an improvement, the side wall of the buffer bin is provided with an air hammer.

[0012] As an improvement, the upper end and the lower end of the buffer bin are each provided with a connecting flange, the upper end and the lower end of the air bag are each provided with an annular flange matching the connecting flange in size, and the two annular flanges are fixed outside the two connecting flanges respectively.

[0013] As an improvement, the upper end of the buffer bin is provided with a receiving pipe, the receiving pipe is in communication with the inner cavity of the air bag, and the receiving pipe is provided with an upper unloading valve.

[0014] As an improvement, the lower end of the buffer bin is connected with a discharging pipe, and the discharging pipe is provided with a lower unloading valve.

[0015] The above technical scheme is adopted in the present application, and compared with the prior art, the present application has the following advantages: The degassing and unloading device can remove more than 90% of the gas contained in the superfine powder, compress the volume of the superfine powder with relatively low specific gravity to 50%-60% of the original volume, and has high compression efficiency; the superfine powder is convenient to package and transport, and the device has the advantages of simple structure, convenient operation, low manufacturing cost, etc., and is especially suitable for degassing treatment of fluffy superfine powder with relatively low specific gravity.

[0016] The present application will be described in detail below in combination with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a structural schematic view of a degassing and unloading device according to the present application; In the figure, 1 is a buffer bin, 2 is an air bag, 3 is a chamber, 4 is a first communication pipe, 5 is a microporous filter rod, 6 is a four-way pipe, 7 is a first exhaust valve, 8 is a first air blowing valve, 9 is a second communication pipe, 10 is a second exhaust valve, 11 is a second air blowing valve, 12 is a receiving pipe, 13 is a discharging pipe, 14 is a connecting flange, 15 is an annular flange, 16 is an upper unloading valve, 17 is a lower unloading valve, 18 is an air hammer, 19 is a first pressure gauge, 20 is a second pressure gauge, and 21 is a powder collecting device. DETAILED DESCRIPTION

[0018] For the convenience of description but not for limitation, the side of the degassing and unloading device close to the center of the air bag is defined as the inner side, and the side opposite to it is defined as the outer side.

[0019] EMBODIMENT

[0020] As Figure 1As shown, a degassing and unloading device includes a buffer chamber 1, an airbag 2 disposed within the buffer chamber 1, and a chamber 3 of variable size formed between the buffer chamber 1 and the airbag 2. The airbag 2 and the buffer chamber 1 are adapted in size and shape. When the volume of the chamber 3 increases, the airbag 2 is compressed, and the volume inside the airbag 2 decreases. The device also includes an exhaust filter device for connecting the exterior of the degassing and unloading device with the interior of the airbag 2.

[0021] 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 side wall of the lower end of the buffer bin 1. In this embodiment, the air hammer 18 is preferably a silo air hammer. The upper and lower ends of the buffer bin 1 are both provided with circular connecting flanges 14, and the upper and lower ends of the airbag 2 are both provided with annular flanges 15 whose sizes match the connecting flanges 14. The two annular flanges 15 are respectively fixed on the outside of the two connecting flanges 14. The upper end of the buffer bin 1 is provided with a material receiving pipe 12, which is connected to the inner cavity of the airbag 2; the material receiving pipe 12 is provided with an upper unloading valve 16. The lower end of the buffer bin 1 is connected to the drop pipe 13, which is connected to the inner cavity of the airbag 2, and the drop pipe 13 is provided with a lower unloading valve 17.

[0022] Specifically, a connecting flange 14 is provided at the lower end of the receiving pipe 12, and an 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 bin 1 and the connecting flange 14 at the lower end of the receiving pipe 12, and the two connecting flanges 14 are fixedly connected by fasteners. A connecting flange 14 is provided at the upper end of the blanking pipe 13, and an 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 bin 1 and the connecting flange 14 at the upper end of the blanking pipe 13, and the two connecting flanges 14 are fixedly connected by fasteners. Preferably, the fasteners are a combination of bolts and nuts. The above structural design fixes the annular flanges 15 at both ends of the airbag 2 to the connecting flanges 14 at both ends of the buffer bin 1 respectively, and clamps the annular flanges 15 and the connecting flanges 14 by fasteners, thereby achieving sealing between the airbag 2 and the buffer bin 1, and the chamber 3 becomes a sealed chamber. When not in use, the airbag 2 is close to the inner wall of the buffer bin 1.

[0023] like Figure 1As shown, the side wall of the buffer bin 1 is provided with a second communication pipe 9 which is in communication with the chamber 3; the exhaust filtering device comprises a first communication pipe 4, the end of the first communication pipe 4 is connected with 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 air bag 2. Specifically, the first communication pipe 4 is fixed on and penetrates through the receiving pipe 12. The end of the first communication pipe 4 is bent downward and connected with the microporous filter rod 5; the microporous filter rod 5 is vertically arranged and located at the middle part of the air bag 2. The microporous filter rod 5 is a standard product available on the market, and the structure of the microporous filter rod 5 will not be described here. The inside of the air bag 2 is in communication with the outside atmosphere through the microporous filter rod 5 and the first communication pipe 4. When the chamber 3 is filled with gas, the volume of the chamber 3 increases, the air bag 2 is compressed, and the gas inside the air bag 2 can be discharged through the microporous filter rod 5 and the first communication pipe 4. When the air bag 2 needs to be restored, there are two ways. One is to inflate the air bag 2 through the first communication pipe 4 and the microporous filter rod 5, the air bag 2 is gradually restored, the volume of the chamber 3 becomes smaller, and the gas in the chamber 3 is discharged through the second communication pipe 9; after the air bag 2 is restored, it will tightly adhere to the inner wall of the buffer bin 1. The second way is to vacuum the chamber 3 through the second communication pipe 9, so that the gas pressure in the chamber 3 is less than the gas pressure in the air bag 2, the air bag 2 is gradually restored, and the outside air enters the air bag 2 through the first communication pipe 4 and the microporous filter rod 5 until the air bag 2 tightly adheres to the inner wall of the buffer bin 1. The above two ways can achieve the restoration of the air bag 2. In this embodiment, the first way is preferred to restore the air bag 2.

[0024] When the air bag 2 is inflated or provided with gas through the first communication pipe 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 effect of cleaning the microporous filter rod 5.

[0025] In this embodiment, the end of the first communication pipe 4 is connected with the first exhaust valve 7, the first inflation valve 8 and the first pressure gauge head 19 through the four-way pipe 6, and the first exhaust valve 7, the first inflation valve 8 and the first pressure gauge head 19 are located outside the degassing and discharging device; the end of the second communication pipe 9 is connected with the second exhaust valve 10, the second inflation valve 11 and the second pressure gauge head 20 through the four-way pipe 6, and the second exhaust valve 10, the second inflation valve 11 and the second pressure gauge head 20 are located outside the degassing and discharging device. The first exhaust valve 7 and the first inflation valve 8, the second exhaust valve 10 and the second inflation valve 11 are all solenoid valves.

[0026] Before using the degassing and discharging device, the receiving pipe 12 needs to be installed on the discharging port of the powder collecting device 21. Open the first air valve 8 and the second exhaust valve 10, and close the first exhaust valve 7 and the second air valve 11. Through the first air valve 8, the air bag 2 is inflated, so that the volume of the air bag 2 increases, the volume of the chamber 3 becomes smaller, and the gas in the chamber 3 is discharged in turn through the second communication pipe 9 and the second exhaust valve 10. The pressure inside the air bag 2 is observed through the first pressure gauge 19, and when the pressure inside the air bag 2 reaches 0.1-0.2 MPa, the pressure is maintained for 5-10 seconds, so that the air bag 2 is as close as possible to the inner wall of the buffer bin 1. Then stop inflating the air bag 2.

[0027] When in use, first open the upper discharging valve 16 and close the lower discharging valve 17. The fluffy powder in the powder collecting device 21 falls into the buffer bin 1 through the receiving pipe 12. After the buffer bin 1 is filled with the powder, the upper discharging valve 16 is closed.

[0028] Then, the air contained in the powder in the air bag 2 is discharged. Open the first exhaust valve 7 and the second air valve 11, and close the first air valve 8 and the second exhaust valve 10. Through the second air valve 11, the chamber 3 between the buffer bin 1 and the air bag 2 is inflated, so that the volume of the chamber 3 increases and the air bag 2 is compressed, the volume of the air bag 2 becomes smaller, the air contained in the powder in the air bag 2 is collected through the microporous filter rod 5 and discharged in turn through the first communication pipe 4, the four-way pipe 6 and the first exhaust valve 7. The pressure inside the chamber 3 is observed through the second pressure gauge 20, and when the pressure inside the chamber 3 reaches 0.1-0.2 MPa, the pressure is maintained for 10-20 seconds, so that the air contained in the powder in the air bag 2 is discharged as much as possible, and this process makes 90% of the gas contained in the powder be removed.

[0029] Finally, the powder is discharged and the air bag 2 is reset. Open the lower discharging valve 17, start the air hammer 18, and discharge the powder in the air bag 2 through the discharging pipe 13, which will be collected or packaged. After all the powder in the air bag 2 is discharged, the lower discharging valve 17 and the air hammer 18 are closed. Open the first air valve 8 and the second exhaust valve 10, and close the first exhaust valve 7 and the second air valve 11. Through the first air valve 8, the air bag 2 is inflated, so that the volume of the air bag 2 increases, the volume of the chamber 3 becomes smaller, and the gas in the chamber 3 is discharged in turn through the second communication pipe 9 and the second exhaust valve 10. The pressure inside the air bag 2 is observed through the first pressure gauge 19, and when the pressure inside the air bag 2 reaches 0.1-0.2 MPa, the pressure is maintained for 5-10 seconds, so that the air bag 2 is as close as possible to the inner wall of the buffer bin 1.

[0030] According to the above steps, the next working cycle is carried out, and the degassing treatment of the powder entering the air bag 2 is continuously realized. Of course, the degassing and discharging device can also be used without being installed on the powder collecting device 21, and can be used alone as a degassing and discharging device.

[0031] In summary, the degassing unloading device can remove more than 90% of the gas contained in the superfine powder, compress the volume of the superfine powder with lighter specific gravity to 50% to 60% of the original volume, and has high compression efficiency; the superfine powder is convenient to package and transport, and has the advantages of simple structure, convenient operation, low manufacturing cost and the like.

[0032] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or the equivalent replacement of part of the technical features recorded in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A degassing and unloading device, characterized in that: The invention comprises a buffer chamber (1), an air bag (2) is provided inside the buffer chamber (1), and a chamber (3) whose volume can be changed is formed between the buffer chamber (1) and the air bag (2); when the volume of the chamber (3) increases, the air bag (2) is compressed, and the volume inside the air bag (2) decreases; and an exhaust filter device for connecting the outside of the degassing and unloading device and the inner cavity of the air bag (2).

2. The degassing and unloading device according to claim 1, characterized in that: The exhaust filter device comprises a first connecting pipe (4), the end of the first connecting pipe (4) is connected to a microporous filter rod (5), and the microporous filter rod (5) is located inside the airbag (2).

3. The degassing and unloading device according to claim 2, characterized in that: The other end of the first connecting pipe (4) is connected to a first exhaust valve (7) and a first air blowing valve (8), and the first exhaust valve (7) and the first air blowing valve (8) are located outside the degassing and unloading device.

4. The degassing and unloading device according to claim 1, characterized in that: A second connecting pipe (9) communicating with the chamber (3) is provided on the side wall of the buffer chamber (1).

5. The degassing and unloading device according to claim 4, characterized in that: The end of the second connecting pipe (9) is connected to a second exhaust valve (10) and a second air blowing valve (11), and the second exhaust valve (10) and the second air blowing valve (11) are located outside the degassing and unloading device.

6. The degassing and unloading device according to claim 1, characterized in that: An air hammer (18) is provided on the side wall of the buffer bin (1).

7. The degassing and unloading device according to any one of claims 1 to 6, characterized in that: The upper and lower ends of the buffer chamber (1) are both provided with connecting flanges (14), and the upper and lower ends of the airbag (2) are both provided with annular flanges (15) whose sizes match the connecting flanges (14), and the two annular flanges (15) are respectively fixed to the outsides of the two connecting flanges (14).

8. The degassing and unloading device according to claim 7, characterized in that: A material receiving pipe (12) is provided at the upper end of the buffer bin (1), and the material receiving pipe (12) is communicated with the inner cavity of the air bag (2); an upper discharge valve (16) is provided on the material receiving pipe (12).

9. The degassing and unloading device according to claim 7, characterized in that: The lower end of the buffer bin (1) is connected to a discharge pipe (13), and a lower discharge valve (17) is provided on the discharge pipe (13).

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