Micro continuous and uniform powder spraying device

Abstract

The utility model relates to the technical field of powder spraying and feeding, in particular to a micro continuous and uniform powder spraying device which comprises a powder falling bin and a powder receiving machine connecting pipe communicated with the powder falling bin, and a powder falling hole is formed in the top of the powder falling bin. The device is characterized in that one end, far away from the powder receiving machine connecting pipe, of the powder falling bin is communicated with an air supply pipe; a partition plate is arranged in the powder falling bin, an air supply channel is formed between the partition plate and the inner side wall of the powder falling bin, and the air supply pipe is communicated with the air supply channel; the partition plate is provided with a plurality of air injection holes. The powder spraying device can blow away inert powder and fill the powder falling bin with the inert powder, and can blow the inert powder into the powder receiving machine connecting pipe, so that continuous and uniform powder supply of the inert powder is facilitated, and accumulation of the inert powder is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of powder spraying and feeding, in particular to a micro-amount continuous and uniform powder spraying device. Background Art

[0002] At present, my country's research on industrial dust inerting and explosion suppression technology mainly adopts three methods. The first method is to use solid media such as sodium bicarbonate powder or calcium carbonate powder (inert powder) to inertify industrial dust; the second method is to use liquid media such as water or water vapor as an important tool for inerting and explosion suppression; the third method is to use gaseous media such as nitrogen or carbon dioxide for inerting.

[0003] When inert powder is used for inertization and explosion suppression, the suppression effect is affected by the concentration and type of inert powder. Relevant practice has proved that compounds such as silicates, phosphates and carbonates have the effect of suppressing combustion. Therefore, when doing preventive work, inert powder can be sprinkled in the working area, because it can eliminate the heat released when the material burns, effectively avoiding secondary explosions. At present, the first method is mainly used for mixed dust removal in dust collectors, that is, using calcium carbonate powder as a solid medium to inertize industrial dust to avoid explosions.

[0004] At present, when the dust collector is mixed and dusted, the calcium carbonate powder is transported into the dust collection pipe of the dust collector through a powder feeder, so that the calcium carbonate powder is mixed with the dust flowing in the dust collection pipe of the dust collector to achieve an explosion-proof effect. When the traditional powder feeder transports inert powder, a material barrel is generally installed on the top of the powder drop bin, and the inert powder is stored in the material barrel. The powder drop bin is provided with a powder drop hole connected to the material barrel. After the inert powder in the material barrel falls into the powder drop bin from the powder drop hole, the inert powder is transported into the dust collection pipe of the dust collector through the powder drop bin and the powder collection pipe connected to the dust collection pipe of the dust collector to realize powder supply. However, after the inert powder falls into the powder drop bin from the powder drop hole, the inert powder is easy to accumulate in the powder drop bin, and in some relatively humid environments, the inert powder is easy to agglomerate, resulting in uneven inert powder supply, and it is easy to cause the accumulation of inert powder to block the powder collection machine connection pipe and the powder drop bin. Summary of the invention

[0005] In view of the above technical problems existing in the prior art, the utility model provides a micro-continuous and uniform powder spraying device, which can blow the inert powder and fill it in the powder dropping bin, and can blow the inert powder into the connecting pipe of the powder receiving machine, thereby facilitating the continuous and uniform powder supply of the inert powder and preventing the accumulation of the inert powder.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A micro-amount continuous and uniform powder spraying device is provided, comprising a powder dropping bin and a powder receiving machine connecting pipe connected to the powder dropping bin, wherein a powder dropping hole is provided on the top of the powder dropping bin; the device is characterized in that: an end of the powder dropping bin away from the powder receiving machine connecting pipe is connected to an air supply pipe; a partition is provided in the powder dropping bin, an air supply channel is formed between the partition and the inner side wall of the powder dropping bin, and the air supply pipe is connected to the air supply channel; the partition is provided with a plurality of air injection holes.

[0008] Furthermore, the longitudinal cross-section of the partition is L-shaped, and the partition includes a horizontal portion and a vertical portion, and the horizontal portion and the vertical portion are both provided with a plurality of the air injection holes; the horizontal portion faces the powder falling hole, and the vertical portion faces the pollination machine connecting pipe.

[0009] Furthermore, the horizontal portion of the partition is configured to be wavy or V-shaped.

[0010] Furthermore, a breathable mesh cloth is provided in the air jet hole.

[0011] Furthermore, a conical material guide pipe is provided between the powder falling bin and the pollination machine connecting pipe, the end of the material guide pipe with a larger diameter is connected to the powder falling bin, and the end of the material guide pipe with a smaller diameter is connected to the pollination machine connecting pipe.

[0012] Furthermore, a propeller is provided in the powder dropping bin, and a first drive motor is provided in the powder dropping bin. A transmission shaft of the first drive motor passes through the powder dropping bin and the partition and is connected to the propeller.

[0013] Furthermore, the powder dropping bin is rotatably provided with a baffle for covering the powder dropping hole.

[0014] Furthermore, the powder dropping bin is provided with a second driving motor, and a transmission shaft of the second driving motor passes through the powder dropping bin and is connected to the baffle.

[0015] Beneficial effects of the utility model:

[0016] The utility model discloses a micro-amount continuous and uniform powder spraying device, comprising a powder falling bin and a powder receiving machine connecting pipe connected to the powder falling bin, wherein a powder falling hole is provided on the top of the powder falling bin; an end of the powder falling bin away from the powder receiving machine connecting pipe is connected to an air supply pipe; a partition is provided in the powder falling bin, an air supply channel is formed between the partition and the inner side wall of the powder falling bin, and the air supply pipe is connected to the air supply channel; the partition is provided with a plurality of air injection holes.

[0017] It can scatter the inert powder and fill it in the powder dropping bin, and can blow the inert powder into the connecting pipe of the powder receiving machine, so as to facilitate the continuous and uniform supply of the inert powder and prevent the accumulation of the inert powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a micro-continuous uniform powder spraying device in the embodiment.

[0019] Figure 2 It is a cross-sectional view of a micro-continuous and uniform powder spraying device in an embodiment.

[0020] Figure 3 for Figure 2 Magnified view at A in the middle.

[0021] Reference numerals:

[0022] 1-powder dropping bin; 2-powder dropping hole; 3-powder receiving machine connecting pipe; 4-air supply pipe; 5-partition; 6-air supply channel; 7-jet hole; 8-breathable mesh cloth; 9-material guide pipe; 10-propeller; 11-first drive motor; 12-baffle; 13-second drive motor; 14-high-precision trace dust concentration monitoring sensor. DETAILED DESCRIPTION

[0023] The present invention is described in detail below in conjunction with specific embodiments and drawings.

[0024] A micro-continuous uniform powder spraying device of this embodiment, such as Figures 1 to 3 As shown, it includes a powder falling bin 1 and a pollination machine connecting pipe 3 connected to the powder falling bin 1, and a powder falling hole 2 is provided on the top of the powder falling bin 1; an end of the powder falling bin 1 away from the pollination machine connecting pipe 3 is connected to an air supply pipe 4; a partition 5 is provided in the powder falling bin 1, and an air supply channel 6 is formed between the partition 5 and the inner wall of the powder falling bin 1, and the air supply pipe 4 is connected to the air supply channel 6; the partition 5 is provided with a plurality of air injection holes 7.

[0025] The longitudinal cross-section of the partition 5 is L-shaped, and the partition 5 includes a horizontal portion and a vertical portion arranged perpendicular to each other, and a plurality of air jet holes 7 are provided in both the horizontal portion and the vertical portion. The horizontal portion is directly opposite to the powder falling hole 2, and the vertical portion is directly opposite to the pollination machine connecting pipe 3. The plurality of air jet holes 7 corresponding to the vertical portion blow air toward one side of the pollination machine connecting pipe 3, and the plurality of air jet holes 7 corresponding to the horizontal portion blow air upward. Optionally, the horizontal portion of the partition 5 in this embodiment can be set to a wave shape or a V shape, so as to provide a multi-directional blowing angle for blowing.

[0026] In actual use, a material barrel is installed above the powder dropping bin 1, and inert powder is stored in the material barrel, and the inert powder falls from the powder dropping hole 2 into the powder dropping bin 1. At the same time, the powder receiving machine connecting pipe 3 is connected to the dust removal pipe of the dust collector. Since the dust is collected by gas flowing in the dust removal pipe of the dust collector, the flowing gas will form a negative pressure in the powder receiving machine connecting pipe 3. The air supply pipe 4 can be connected to an air supply device, such as an air pump.

[0027] During use, the air supply device blows gas to the air supply pipe 4 at high speed, and the air flow is blown into the air supply channel 6 through the air supply pipe 4. At this time, a part of the air flow in the air supply channel 6 is ejected from the multiple air jet holes 7 corresponding to the vertical part, which is convenient for blowing the inert powder in the powder falling bin 1 toward the side of the powder receiving machine connecting pipe 3. At the same time, a part of the air flow is ejected from the multiple air jet holes 7 corresponding to the horizontal part, and this part of the air flow is blown upward, so that the inert powder falling from the powder falling hole 2 into the powder falling bin 1 can be directly blown upward by the upward blowing air flow, so that the inert powder can be blown away by the longitudinal air flow and the transverse air flow, so that the inert powder floats inside the powder falling bin 1 and is continuously transported into the dust removal pipe of the dust collector through the horizontal air flow and the negative pressure in the powder receiving machine connecting pipe 3, so that the continuous and uniform powder supply of the inert powder is convenient, and the accumulation of the inert powder is prevented due to the upward blowing of the air flow.

[0028] like Figure 2 and Figure 3 As shown, in some embodiments of the present invention, a breathable mesh cloth 8 is provided in the above-mentioned air jet hole 7. The breathable mesh cloth 8 can be made of a cloth that can pass gas but cannot be passed by inert powder, and the mesh of the cloth can be smaller than the particle size of the inert powder. In this way, the inert powder is prevented from falling from the air jet hole 7 into the air supply channel 6.

[0029] like Figure 1 and Figure 2 As shown, in this embodiment, a conical guide pipe 9 is provided between the powder dropping bin 1 and the pollination machine connecting pipe 3, and the end of the guide pipe 9 with a larger diameter is connected to the powder dropping bin 1, and the end of the guide pipe 9 with a smaller diameter is connected to the pollination machine connecting pipe 3. By setting a conical guide pipe 9, this patent facilitates the inert powder in the powder dropping bin 1 to be blown into the pollination machine connecting pipe 3 along the guide pipe 9. In this embodiment, a propeller 10 is provided in the powder dropping bin 1, and the powder dropping bin 1 is provided with a first drive motor 11, and the transmission shaft of the first drive motor 11 passes through the powder dropping bin 1 and the partition 5 and is connected to the propeller 10. By setting the propeller 10, this patent can start the first drive motor 11 to drive the propeller 10 to rotate when in use, so that the inert powder can be broken up by the propeller 10 to prevent it from agglomerating.

[0030] In this embodiment, the powder dropping bin 1 is rotatably provided with a baffle 12 for blocking the powder dropping hole 2. The powder dropping bin 1 is provided with a second drive motor 13, and the transmission shaft of the second drive motor 13 passes through the powder dropping bin 1 and is connected to the baffle 12. By setting the baffle 12, when the inert powder needs to fall into the powder dropping bin 1, the second drive motor 13 drives the baffle 12 to rotate so that the baffle 12 moves away from the position of the powder dropping hole 2, which facilitates the inert powder to fall into the powder dropping bin 1 through the powder dropping hole 2. Then the second drive motor 13 drives the baffle 12 to rotate in the opposite direction so that the baffle 12 blocks the powder dropping hole 2, thereby preventing the air flow speed in the powder dropping bin 1 from being too fast and causing the air flow to blow upward toward the powder dropping hole 2. In this way, the inert powder can be dropped into the powder dropping bin 1 by driving the baffle 12 to move back and forth by the second drive motor 13.

[0031] Optionally, this embodiment may add measures for removing dust accumulation. When there is a problem of powder accumulation inside the powder dropping bin 1, a device that can generate a large negative pressure, such as a high-power vacuum pump, can be connected through the powder receiving machine connecting pipe 3 on the left side to evacuate air. The air supply pipe 4 on the right side is connected to the outside air. At this time, the accumulated powder inside the powder dropping bin 1 can be quickly sucked out by relying on the negative pressure.

[0032] Optionally, in this embodiment, three high-precision trace dust concentration monitoring sensors 14 may be set on the inner wall of the powder dropping bin 1, and a processor may also be set. The processor adopts an existing single-chip microcomputer, and the high-precision trace dust concentration monitoring sensor 14 and the second drive motor 13 are electrically connected to the processor. The dust concentration in the powder dropping bin 1 is monitored by the high-precision trace dust concentration monitoring sensor 14 and transmitted to the processor. When the dust concentration exceeds the threshold value set in the processor, the processor controls the second drive motor 13 to start so that the baffle 12 blocks the powder dropping hole 2; when the dust concentration is lower than the threshold value set in the processor, the processor controls the second drive motor 13 to start so that the baffle 12 moves away from the powder dropping hole 2.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The standard parts used in the utility model can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt the conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A micro-continuous uniform powder spraying device, comprising a powder dropping bin and a powder receiving machine connecting pipe connected to the powder dropping bin, wherein a powder dropping hole is provided on the top of the powder dropping bin; characterized in that: An end of the powder dropping bin away from the pollination machine connecting pipe is connected to an air supply pipe; a partition is provided in the powder dropping bin, an air supply channel is formed between the partition and the inner wall of the powder dropping bin, and the air supply pipe is connected to the air supply channel; the partition is provided with a plurality of air injection holes.

2. A micro-continuous uniform powder spraying device according to claim 1, characterized in that: The longitudinal cross-section of the partition is L-shaped, and the partition includes a horizontal portion and a vertical portion, and the horizontal portion and the vertical portion are both provided with a plurality of the air injection holes; the horizontal portion faces the powder falling hole, and the vertical portion faces the pollination machine connecting pipe.

3. A micro-continuous uniform powder spraying device according to claim 2, characterized in that: The horizontal portion of the partition is configured to be in a wave shape or a V shape.

4. A micro-continuous uniform powder spraying device according to claim 1, characterized in that: A breathable mesh cloth is arranged in the air-jet hole.

5. A micro-continuous uniform powder spraying device according to claim 1, characterized in that: A conical material guide pipe is provided between the powder falling bin and the pollination machine connecting pipe, the end of the material guide pipe with a larger diameter is connected to the powder falling bin, and the end of the material guide pipe with a smaller diameter is connected to the pollination machine connecting pipe.

6. A micro-continuous uniform powder spraying device according to claim 1, characterized in that: A propeller is arranged in the powder dropping bin, and a first driving motor is arranged in the powder dropping bin. A transmission shaft of the first driving motor passes through the powder dropping bin and the partition and is connected to the propeller.

7. A micro-continuous uniform powder spraying device according to claim 6, characterized in that: The powder dropping bin is rotatably provided with a baffle for covering the powder dropping hole.

8. A micro-continuous uniform powder spraying device according to claim 7, characterized in that: The powder dropping bin is provided with a second driving motor, and a transmission shaft of the second driving motor passes through the powder dropping bin and is connected to the baffle.

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