Conveying and flow-assisting device for low-density graphene powder

Abstract

The utility model provides a conveying flow-aiding device for low-density graphene powder, which is used for conveying and blanking powder in a stock bin, a blanking port is arranged at the bottom of the stock bin, a plurality of groups of gas discs are sequentially distributed on the blanking port along the blanking direction through the bin wall of the stock bin, and a flow-aiding ring is arranged on the inner wall of the stock bin along the circumferential direction of the inner wall. The flow aiding ring is arranged below the lowermost gas disc and above the feed opening; a plurality of exhaust ports pointing to the direction of the discharging port are distributed in the flow aiding ring at intervals, and the flow aiding ring is further externally connected with an air pump device for supplying air to the flow aiding ring. The flow assisting device is reasonable in structural design, and the flow assisting ring is designed at the position of the discharging opening on the basis that an air disc is used for assisting flow originally. During discharging, gas is introduced into the flow-aiding ring, and the gas is instantly released downwards through the exhaust port of the annular pipeline, so that negative pressure is formed in the stock bin above the flow-aiding ring, the accumulated ultra-low-density powder is downwards pumped and discharged, and the flow-aiding efficiency of discharging is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of powder conveying, in particular to a conveying flow-aiding device for low-density graphene powder. Background Art

[0002] In powder transportation, the feeding system can use a vacuum feeder for feeding. In graphene powder transportation, when the powder bulk density is small, for example, the powder bulk density is 0.008-0.14g / cm 3 At the same time, there is a current situation where the powder feeding and conveying effect is poor.

[0003] In the vacuum feeding system currently used, the silo often uses an air disc or a vibrating hammer as a flow-aiding and anti-bridging device.

[0004] When a vibrating hammer is used as a flow-aiding method, the pneumatic hammer knocks the silo wall at a set interval to achieve powder discharge. However, the knocking process has the problem of high noise, and the effect is also poor for powders with low bulk density.

[0005] When using the air disc as a flow aid, after the powder reaches the silo, the air disc will ventilate instantly according to the interval time set by the program, blowing off the powder attached to the silo wall. However, when the powder is ultra-low density powder (powder bulk density ≤ 0.01g / cm 3 ), there is powder accumulation and no material discharge.

[0006] During the unloading process of the silo, the existing method of using air discs as a flow aid is usually shown in Figure 3. Several groups of air discs can be arranged on the silo wall along the unloading direction. Figure 3 There are three sets of gas discs in the middle. After reaching the silo, a large amount of gas is instantly introduced into the silo through the three sets of gas discs, and the gas diffuses 360° along the silo wall, thereby achieving flow-aided material discharge. However, due to the low bulk density of graphene powder, there is still a situation where powder accumulates and material is not discharged. Utility Model Content

[0007] The technical problem to be solved by the utility model is: in order to overcome the shortcomings of the existing technology, the utility model provides a conveying and flow-aiding device for low-density graphene powder. Aiming at the problem that ultra-low density powder is fed slowly or even not fed, under the flow-aiding of an air disc and combined with negative pressure feeding, the flow can be effectively assisted to avoid the situation where ultra-low density powder accumulates and does not feed.

[0008] The technical solution adopted by the utility model to solve its technical problems is: a conveying and flow-aiding device for low-density graphene powder, which is used for conveying and discharging powder in a silo, and a discharging port is provided at the bottom of the silo, and a plurality of groups of air discs are sequentially distributed on the silo wall along the discharging direction of the silo, and a flow-aiding ring is provided on the inner wall of the silo along the circumference of the inner wall, and the flow-aiding ring is arranged below the air disc located at the bottom, and the flow-aiding ring is located above the discharging port; a plurality of exhaust ports pointing to the direction of the discharging port are distributed at intervals on the flow-aiding ring, and the flow-aiding ring is also externally connected to an air pump device for supplying air to the flow-aiding ring.

[0009] In the above scheme, compared with the traditional method of only using air disc to assist flow, a flow-aiding ring is added under the air disc to address the situation where ultra-low density powders are prone to accumulation when being fed. When flow-aiding operation is required, the air disc is used to assist flow on the one hand, and the flow-aiding ring is used to release gas downward on the other hand. The space above the flow-aiding ring of the silo forms a negative pressure relative to the space below it, and the powder above is pumped downward along with the gas released by the flow-aiding ring, which further improves the flow-aiding efficiency and avoids powder accumulation.

[0010] Furthermore, a dust collector is provided at the upper section of the silo, and a centrifugal fan is connected to the dust collector to provide negative pressure for the dust collector.

[0011] Furthermore, the axial cross-section of the lower section of the silo is a tapered structure with a larger upper end and a smaller lower end, and the air disc and the flow-aiding ring are both arranged at the lower section of the silo.

[0012] Furthermore, the flow-aiding ring is a circular ring structure, and the circular ring structure is coaxially arranged with the tapered structure of the lower section of the silo.

[0013] Furthermore, the exhaust ports are evenly distributed at equal intervals on the lower end surface of the flow-aiding ring.

[0014] Preferably, the opening direction of the exhaust port points downward.

[0015] Furthermore, the bottom of the discharge port is connected to a discharge kettle via a flexible connection.

[0016] The beneficial effect of the utility model is that the utility model provides a conveying flow-aiding device for low-density graphene powder, which has a reasonable structural design. During the material bin unloading process, on the basis of the original use of air discs for flow-aiding, a negative pressure flow-aiding device, a flow-aiding ring, is designed at the unloading port. During unloading, gas is introduced into the flow-aiding ring, and the gas is instantly released downward from the exhaust port through the annular pipeline of the flow-aiding ring, so that negative pressure is formed in the material bin above the negative pressure flow-aiding device, and the accumulated ultra-low density powder is pumped downward for unloading, effectively improving the flow-aiding efficiency of unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic structural diagram of the optimal embodiment of the utility model (the direction of the arrow is the powder conveying direction).

[0019] Figure 2 It is an enlarged schematic diagram of the flow-aiding ring in the optimal embodiment of the utility model (the direction of the arrow is the direction of the airflow).

[0020] Figure 3 It is a schematic diagram of the structure of the conventional air disc flow-aiding device of the utility model (the direction of the arrow is the powder conveying direction).

[0021] In the figure, 1, silo, 2, air disc, 3, discharge port, 4, flexible connection, 5, discharge kettle, 6, dust collector, 7, centrifugal fan, 8, flow-aiding ring, 9, exhaust port. DETAILED DESCRIPTION

[0022] The utility model is now described in further detail in conjunction with the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, so they only show the components related to the utility model, and the directions and references (for example, up, down, left, right, etc.) can only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not adopted in a restrictive sense, and the scope of the subject matter claimed is limited only by the attached claims and their equivalents.

[0023] like Figure 1 and Figure 2 The conveying and flow-aiding device for low-density graphene powder shown is the optimal embodiment of the utility model. The conveying and flow-aiding device is used to convey and discharge the powder in the silo 1. A dust collector 6 is provided at the upper section of the silo 1, and a centrifugal fan 7 is connected to the dust collector 6 to provide negative pressure for the dust collector 6. A discharge port 3 is provided at the bottom of the silo 1, and a discharge kettle 5 is connected to the bottom of the discharge port 3 through a flexible connection 4.

[0024] The conveying and flow-aiding device comprises two sets of air discs 2 and a flow-aiding ring 8. Specifically, Figure 1 As shown, in this embodiment, the axial cross-section of the lower section of the silo 1 is a tapered structure with a larger upper end and a smaller lower end. In actual selection, a funnel-shaped structure may be preferably adopted, and two sets of air discs 2 and flow-aiding rings 9 are both arranged at the lower section of the silo.

[0025] Two groups of gas discs 2 are sequentially distributed on the wall of the silo 1 along the material discharge direction. After the powder reaches the silo 1, a large amount of gas is instantly introduced into the two groups of gas discs 2 located above, and the gas diffuses 360° along the wall of the silo 1, forming a flow-aiding effect to assist material discharge.

[0026] On the basis of the above-mentioned air disc 2 flow-assisting method, this embodiment further provides a flow-assisting method using a flow-assisting ring 8 to form a negative pressure. Figure 1 and Figure 2 As shown, specifically, a flow-aiding ring 8 is provided on the inner wall of the silo 1 along the circumference of the inner wall, and the flow-aiding ring 8 is arranged below the air disc 2 located at the bottom, and is located above the discharge port 3. The flow-aiding ring 8 is externally connected to an air pump device for supplying air to the flow-aiding ring 8. The flow-aiding ring 8 is preferably an annular structure, and the annular structure and the tapered structure of the lower section of the silo are coaxially arranged. A number of exhaust ports 9 pointing downward are evenly spaced on the lower end surface of the annular structure. In this embodiment, eight points are evenly spaced in an annular shape on the annular structure, one of which is an air inlet connected to the pipeline of the air pump device, and the remaining seven points are exhaust ports 9.

[0027] During operation, the air pump device supplies air to the flow-aiding ring 8. Under the control of the air pump, the gas is instantly released downward from the exhaust port 9 of the flow-aiding ring 8. The space above the flow-aiding ring 8 of the silo 1 forms a negative pressure relative to the space below it. While the air is supplied downward, the powder above is also pumped downward for feeding. The pneumatic conveying is further utilized. The traditional air disc 2 above assists the flow and the negative pressure flow of the flow-aiding ring 8 assists the flow. The combination of the two can be effectively applied to the flow-aiding feeding of ultra-low density powders, especially for powders with a bulk density of 0.008-0.14g / cm 3 The graphene powder can be discharged smoothly to avoid the accumulation and non-discharging of graphene powder during the discharge process.

[0028] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A conveying and flow-aiding device for low-density graphene powder, used for conveying and unloading powder in a silo (1), characterized in that: The bottom of the silo (1) is provided with a discharge port (3), and a plurality of groups of air discs (2) are sequentially distributed on the silo wall of the silo (1) along the discharge direction. A flow-aiding ring (8) is provided on the inner wall of the silo (1) along the circumference of the inner wall. The flow-aiding ring (8) is arranged below the air disc (2) located at the bottom, and the flow-aiding ring (8) is located above the discharge port (3); The flow-aiding ring (8) is provided with a plurality of exhaust ports (9) pointing to the direction of the material discharge port (3) at intervals, and the flow-aiding ring (8) is also externally connected to an air pump device for supplying air to the flow-aiding ring (8).

2. A flow-aiding device for conveying low-density graphene powder according to claim 1, characterized in that: The upper section of the silo (1) is provided with a dust collector (6), and the dust collector (6) is connected to a centrifugal fan (7) for providing negative pressure for the dust collector (6).

3. A flow-aiding device for conveying low-density graphene powder according to claim 2, characterized in that: The axial cross-section of the lower section of the silo (1) presents a tapered structure with a larger upper end and a smaller lower end. The air disc (2) and the flow-aiding ring (8) are both arranged at the lower section of the silo (1).

4. A flow-aiding device for conveying low-density graphene powder according to claim 3, characterized in that: The flow-aiding ring (8) is a circular ring structure, which is coaxially arranged with the tapered structure of the lower section of the silo (1).

5. A flow-aiding device for conveying low-density graphene powder according to claim 4, characterized in that: The exhaust ports (9) are evenly distributed at equal intervals on the lower end surface of the flow-aiding ring (8).

6. A flow-aiding device for conveying low-density graphene powder according to claim 5, characterized in that: The opening direction of the exhaust port (9) points downward.

7. A flow-aiding device for conveying low-density graphene powder according to claim 1, characterized in that: The bottom of the discharge port (3) is connected to a discharge kettle (5) via a flexible connection (4).

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