Powder conveying device

Abstract

The utility model relates to the technical field of powder conveying, and particularly discloses a powder conveying device which comprises a buffer tank, a storage tank, a vacuum pipe and a feeding pipe. The feeding pipe is connected with a feeding hole of the buffer tank; a discharge port of the buffer tank is connected with a feed port of the storage tank; and the vacuum pipe is connected with the buffer tank. According to the scheme, powder can enter the buffer tank through the feeding pipe, and after the buffer tank is vacuumized through the vacuum pipe, the powder is discharged into the storage tank. In the discharging process of the storage tank, the buffer tank can intermittently supplement materials for the storage tank, so that the discharging port of the storage tank can be kept in a continuous opening state, and the powder conveying efficiency of the storage tank is improved.

Description

Technical Field

[0001] The present application relates to the technical field of powder material conveying, and in particular to a powder material conveying device. Background Art

[0002] During the process of conveying and loading powdered materials, a vacuum assembly is generally provided to vacuum extract the powder in order to make the powder more compact. During use, the feed port of the powder tank is generally opened first to allow the powder to be fed into the tank. During the feeding process, the vacuum assembly is activated to extract gas from the tank. Once the powder in the tank reaches the preset capacity and the tank is extracted to meet the vacuum requirements, the feed port and the vacuum assembly are closed, and the discharge port of the tank is opened to convey the powder.

[0003] As can be seen from the above, the existing powder tank needs to operate at intervals from the vacuum component to convey the powder, which cannot achieve continuous conveying of the powder, resulting in low conveying efficiency. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a powder conveying device for improving the conveying efficiency of powder.

[0005] In order to achieve the above technical objectives, the present application provides a powder conveying device, comprising: a buffer tank, a storage tank, a vacuum tube and a feed pipe;

[0006] The feed pipe is connected to the feed port of the buffer tank;

[0007] The discharge port of the buffer tank is connected to the feed port of the storage tank;

[0008] The vacuum tube is connected to the buffer tank.

[0009] Furthermore, the vacuum tube is connected to the buffer tank through a first vacuum valve.

[0010] Furthermore, the vacuum tube is connected to the storage tank.

[0011] Furthermore, the vacuum tube is connected to the storage tank through a second vacuum valve.

[0012] Furthermore, the feed pipe is connected to the feed port of the buffer tank through a butterfly valve.

[0013] Furthermore, the discharge port of the buffer tank is connected to the feed port of the storage tank through a transfer valve.

[0014] Furthermore, it also includes: a gas pipe;

[0015] The gas pipe is connected to the storage tank through a first gas delivery valve.

[0016] Furthermore, the gas pipe is connected to the buffer tank through a second gas delivery valve.

[0017] Furthermore, it also includes an air return pipe;

[0018] The air return pipe is connected to the top of the buffer tank and the top of the storage tank;

[0019] The air return pipe is provided with an air return valve.

[0020] Furthermore, the gas pipe is a nitrogen pipe for transporting nitrogen.

[0021] It can be seen from the above technical solution that the present application provides a powder conveying device, including: a buffer tank, a storage tank, a vacuum tube and a feed pipe; the feed pipe is connected to the feed port of the buffer tank; the discharge port of the buffer tank is connected to the feed port of the storage tank; the vacuum tube is connected to the buffer tank.

[0022] In this solution, powdered material can enter the buffer tank through the feed pipe, and after the vacuum pipe evacuates the buffer tank, it is discharged into the storage tank. During the discharge process of the storage tank, the buffer tank can intermittently replenish the storage tank, so that the discharge port of the storage tank can be kept in a continuously open state, thereby improving the powder delivery efficiency of the storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1 A schematic structural diagram of a powder conveying device provided in an embodiment of the present application;

[0025] Figure 2 A schematic structural diagram of a powder conveying device provided in an embodiment of the present application from another perspective

[0026] In the picture:

[0027] 10. Buffer tank; 11. Transfer valve;

[0028] 20. Storage tank; 21. Discharge valve;

[0029] 30. Vacuum tube; 31. First vacuum valve; 32. Second vacuum valve;

[0030] 40. Feed pipe; 41. Butterfly valve;

[0031] 50. Gas pipe; 51. First gas delivery valve; 52. Second gas delivery valve;

[0032] 60. Return air pipe; 61. Return air valve; 62. Check valve. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions of the embodiments of this application in conjunction with the accompanying drawings. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection requested by this application.

[0034] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0035] In the description of the embodiments of the present application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, replaceable connections, or integral connections. They can also refer to mechanical connections or electrical connections. They can also refer to direct connections or indirect connections through an intermediate medium. They can also refer to internal connections between two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0036] See also Figure 1 and Figure 2 In an embodiment of the present application, a powder conveying device is provided, comprising: a buffer tank 10, a storage tank 20, a vacuum tube 30, and a feed tube 40. The feed tube 40 is used to convey powder, and one end of the feed tube 40 can be connected to the powder storage device; the other end of the feed tube 40 is connected to the feed port of the buffer tank 10. The discharge port of the buffer tank 10 is connected to the feed port of the storage tank 20; one end of the vacuum tube 30 is connected to the buffer tank 10. The other end of the vacuum tube 30 can be connected to a vacuum pump.

[0037] During the powder delivery process, the feed pipe 40 can deliver the powder into the buffer tank 10. When the powder in the buffer tank 10 reaches a certain height, the feed port of the buffer tank 10 or the powder storage device connected to the feed pipe 40 is closed, stopping the feeding of the buffer tank 10. At this time, the vacuum tube 30 remains open to pump the gas in the buffer tank 10 into the buffer tank 10 to meet the vacuum requirement. The vacuum tube 30 is then closed and the discharge port of the buffer tank 10 is opened, allowing the powder in the buffer tank 10 to be discharged into the storage tank 20.

[0038] During the above process, the vacuum tube 30 can evacuate the buffer tank 10 after the buffer tank 10 stops feeding. The vacuum tube 30 can also continue to evacuate the buffer tank 10 during the feeding process. The vacuum tube 30 stops evacuating the buffer tank 10 while the buffer tank 10 is discharging the powder into the storage tank 20. The vacuum tube 30 can be controlled to stop evacuating by turning off the vacuum pump.

[0039] Optionally, a filter is provided at one end of the vacuum tube 30 for filtering powder to prevent the powder from entering the vacuum tube 30 .

[0040] Optionally, the discharge port of the storage tank 20 is provided with a discharge valve 21. The discharge port of the storage tank 20 is connected to the container required for the next process through the discharge valve 21. When the discharge valve 21 is opened, the powder in the storage tank 20 can be transported to the container.

[0041] The powder material conveying process of the powder material conveying device provided in this embodiment may include the following steps:

[0042] S01: The buffer tank 10 starts feeding, and the buffer tank 10 stops feeding when the powder in the buffer tank 10 reaches a preset height;

[0043] S02: Pumping the buffer tank 10 through the vacuum pipe 30 until its vacuum degree meets the vacuum degree requirement;

[0044] S03: Stop the vacuum tube 30 from pumping air, then open the discharge port of the buffer tank 10 so that the powder in the buffer tank 10 can be discharged into the storage tank 20;

[0045] S04: After the buffer tank 10 is emptied, the discharge port of the buffer tank 10 is closed, and the process returns to step S01 until the conveying operation of the storage tank 20 is completed.

[0046] In this embodiment, the buffer tank 10 can intermittently replenish the storage tank 20 by repeating the above-mentioned process of steps S01 to S03; since the powder transported from the buffer tank 10 to the storage tank 20 has been extracted to meet the vacuum requirements, the storage tank 20 does not need to close the discharge valve 21 for re-vacuuming, so the discharge valve 21 of the storage tank 20 can be kept in the open state, so that the powder can be continuously transported into the container, thereby improving the transportation efficiency of the powder.

[0047] Optionally, the discharge port of the buffer tank 10 can be connected to the feed port of the storage tank 20 via a transfer valve 11. In the above steps S01 to S04, the manner of opening and closing the discharge port of the buffer tank 10 can be controlled by the transfer valve 11.

[0048] In one embodiment, the vacuum pipe 30 is connected to the buffer tank 10 via a first vacuum valve 31. The first vacuum valve 31 can control the opening and closing of the vacuum pipe 30 and the buffer tank 10.

[0049] In another embodiment, the vacuum tube 30 is further connected to the material storage tank 20 , so that the vacuum tube 30 can draw a vacuum into the material storage tank 20 .

[0050] For example, before the above-mentioned step S01 , the gas in the storage tank 20 may be evacuated through the vacuum tube 30 to ensure that the vacuum degree can be maintained when the powder enters the storage tank 20 .

[0051] Optionally, the vacuum tube 30 is connected to the material storage tank 20 via a second vacuum valve 32. The second vacuum valve 32 can control the opening and closing between the vacuum tube 30 and the material storage tank 20.

[0052] In one embodiment, the feed pipe 40 is connected to the feed port of the buffer tank 10 through a butterfly valve 41. When the butterfly valve 41 is open, the feed pipe 40 starts feeding the buffer tank 10; when the butterfly valve 41 is closed, the buffer tank 10 stops feeding.

[0053] In applications, some processes require not only the exhaustion of oxygen from the powder in the storage tank 20 but also the injection of inert gas into the powder.

[0054] To this end, in one embodiment, it further includes: a gas pipe 50 ; the gas pipe 50 is connected to the storage tank 20 through a first gas delivery valve 51 .

[0055] The first gas supply valve 51 can control the opening and closing of the gas pipe 50 and the material storage tank 20 .

[0056] During use, the first gas supply valve 51 can continuously supply inert gas to the powder in the storage tank 20 .

[0057] In a more specific embodiment, the gas pipe 50 is also connected to the buffer tank 10 through the second gas valve 52, so that after the gas in the buffer tank 10 is extracted to meet the vacuum requirement, the gas pipe 50 can inject inert gas into the buffer tank 10 to the preset air pressure requirement, and then transport the powder to the storage tank 20.

[0058] The gas pipe 50 may be a nitrogen pipe for transporting nitrogen.

[0059] The powder material conveying process of the powder material conveying device provided in this embodiment may include the following steps:

[0060] S10: Open the second vacuum valve so that the vacuum pipe 30 draws air from the storage tank 20 until the vacuum level meets the requirements;

[0061] S20: Close the second vacuum valve and open the first gas supply valve 51, so that the gas pipe 50 inputs inert gas into the storage tank 20 until the other parts of the storage tank 20 meet the preset air pressure requirement. The preset air pressure requirement may be equal to the atmospheric pressure.

[0062] S30: Close the first gas delivery valve 51, open the first vacuum valve 31, and pump the buffer tank 10 into a vacuum state;

[0063] S40: Open the butterfly valve 41 to allow the powder to enter the buffer tank 10 under the traction of negative pressure until the powder in the buffer tank 10 reaches a preset height;

[0064] S50: Close the butterfly valve 41. After the vacuum degree in the buffer tank 10 meets the vacuum degree requirement, close the first vacuum valve 31.

[0065] S60: Open the second gas supply valve 52 so that the gas pipe 50 supplies inert gas into the buffer tank 10 until the pressure in the buffer tank 10 is consistent with that in the storage tank 20;

[0066] When the buffer tank 10 is under negative pressure, materials may accumulate in the buffer tank 10. Therefore, in this embodiment, inert gas is first introduced into the buffer tank 10 and then the transfer valve 11 is opened to ensure smooth material transportation.

[0067] S70 : Open the transfer valve 11 to transfer the powder in the buffer tank 10 to the storage tank 20 .

[0068] S80: After the buffer tank 10 is emptied, the transfer valve 11 is closed and the process returns to step S20.

[0069] Through the above steps, this embodiment can achieve continuous conveying of powder material in the storage tank 20, and the conveyed powder material is isolated from the control during the entire process, thereby avoiding the risk of powder material being contaminated or affecting the environment.

[0070] In one embodiment, a return air pipe 60 is further included; the return air pipe 60 connects the top of the buffer tank 10 and the top of the storage tank 20; and a return air valve 61 is provided on the return air pipe 60.

[0071] When the return air valve 61 is opened, the return air pipe 60 connects the buffer tank 10 and the storage tank 20 , so that the buffer tank 10 , the storage tank 20 and the return air pipe 60 can form a loop, which helps the powder to flow smoothly into the storage tank 20 .

[0072] Optionally, a one-way valve 62 may be provided on the return air pipe 60 to prevent the powder and gas in the storage tank 20 from flowing back, thereby further ensuring the smoothness of the discharge of the buffer tank 10 .

[0073] The above are only preferred embodiments of the present application and are not intended to limit the present invention. Although the present application has been described in detail with reference to examples, those skilled in the art can still modify the technical solutions described in the aforementioned examples or make equivalent replacements for some of the technical features therein. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A powder conveying device, characterized in that: include: A buffer tank (10), a storage tank (20), a vacuum tube (30) and a feed tube (40); The feed pipe (40) is connected to the feed port of the buffer tank (10); The discharge port of the buffer tank (10) is connected to the feed port of the storage tank (20); The vacuum tube (30) is connected to the buffer tank (10).

2. The powder conveying device according to claim 1, characterized in that: The vacuum tube (30) is connected to the buffer tank (10) via a first vacuum valve (31).

3. The powder conveying device according to claim 2, characterized in that: The vacuum tube (30) is connected to the storage tank (20).

4. The powder conveying device according to claim 3, characterized in that: The vacuum tube (30) is connected to the material storage tank (20) via a second vacuum valve (32).

5. The powder conveying device according to claim 1, characterized in that: The feed pipe (40) is connected to the feed port of the buffer tank (10) via a butterfly valve (41).

6. The powder conveying device according to claim 1, characterized in that: The discharge port of the buffer tank (10) is connected to the feed port of the storage tank (20) via a transfer valve (11).

7. The powder conveying device according to any one of claims 1 to 6, characterized in that: Also includes: Gas pipe (50); The gas pipe (50) is connected to the storage tank (20) via a first gas delivery valve (51).

8. The powder material conveying device according to claim 7, characterized in that: The gas pipe (50) is connected to the buffer tank (10) via a second gas delivery valve (52).

9. The powder conveying device according to claim 8, characterized in that: Also included is an air return tube (60); The air return pipe (60) connects the top of the buffer tank (10) and the top of the storage tank (20); The air return pipe (60) is provided with an air return valve (61).

10. The powder conveying device according to claim 7, characterized in that: The gas pipe (50) is a nitrogen pipe for transporting nitrogen.

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