Powder conveying and feeding system

Abstract

The utility model discloses a powder conveying and feeding system which comprises a vacuum feeding device, a powder conveying device and a powder conveying device. The feeding machine is provided with a discharging port, and a conveying pipe is connected between the feeding port and the discharging port; the air supplementing device is arranged on the material conveying pipe, and the air supplementing device can input air flow in the direction from the feeding port to the discharging port into the material conveying pipe; the vacuum feeding device is arranged on the material conveying pipe, the pressure relief device is arranged on the material conveying pipe, the pressure relief device is located on the side, closer to the vacuum feeding device, of the pressure relief device relative to the air supply device, and a filtering flow channel communicated with the material conveying pipe and the outside is arranged in the pressure relief device. In addition, the air pressure in the vacuum feeding device can be stabilized through the pressure relief device, and the problem that air leaks and powder leaks at the sealing position due to the fact that the pressure in the vacuum feeding device is too large is effectively solved.

Description

Technical Field

[0001] The utility model relates to a conveying device, in particular to a powder material conveying and feeding system. Background Art

[0002] In the pharmaceutical, lithium battery, food, chemical and other industries, the extraction and transportation of powder materials is an important process. In order to prevent the powder materials from being contaminated by air, environment, etc. during the transportation process, the more commonly used transportation method is negative pressure closed transportation.

[0003] In the process of powder transportation, some powders are sticky and easy to stick to the wall and cause blockage during transportation, especially in long-distance pipeline transportation. Therefore, there is an urgent need for a feeding system that can better transport powders. Utility Model Content

[0004] The utility model aims to provide a powder material conveying and feeding system to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0005] The solution of the utility model to solve the technical problem is:

[0006] A powder conveying and feeding system comprises: a vacuum feeding device, which is provided with a feed inlet; a feeder, which is provided with a discharge port, and a feeding pipe is connected between the feed inlet and the discharge port; an air supply device, which is provided on the feeding pipe, and the air supply device can input an airflow from the feed inlet to the discharge port into the feeding pipe; a pressure relief device, which is provided on the feeding pipe, and the pressure relief device is located closer to the vacuum feeding device relative to the air supply device, and a filtering flow channel connected to the feeding pipe and the outside is provided in the pressure relief device.

[0007] The technical solution has at least the following beneficial effects: when feeding, feeding is done into the feeder, and negative pressure is formed in the vacuum feeding device. The powder of the feeder is transported from the feeding pipe to the vacuum feeding device under the action of the negative pressure. During the transportation of the powder, an air supply device can be used to input airflow into the feeding pipe. The airflow is transported from the feed port to the discharge port, which can assist in sending the powder into the vacuum feeding device. Since air is supplied from the outside to the feeding pipe, the air pressure in the vacuum feeding device will eventually increase. Therefore, a pressure relief device is provided near the vacuum feeding device. The air pressure can be reduced through the filtering flow channel in the pressure relief device, and the direct discharge of the powder to the outside is reduced, thereby ensuring that the air pressure in the vacuum feeding device is within a normal range. The powder is transported by auxiliary airflow in this way, which is also applicable to longer feeding pipes. In addition, the air pressure in the vacuum feeding device can be stabilized by the pressure relief device, effectively avoiding the problem of excessive pressure in the vacuum feeding device and air leakage and powder emission at the sealing position.

[0008] As a further improvement of the above technical solution, the pressure relief device includes a pressure relief shell, a partition and a filter element, the pressure relief shell is connected to one side of the vacuum feeding device, the partition separates the pressure relief shell in the up and down direction to form an upper cavity and a lower cavity, the filter element is arranged on the partition, the lower cavity forms the filtering flow channel through the filter element to the upper cavity area, the partition is provided with a switch valve at the outer position of the upper cavity, and the feeding pipe is connected with the feeding port through the lower cavity. When the vacuum feeding device needs to be pressure-relieved, the switch valve is opened, the air pressure in the lower cavity is high, the airflow flows into the upper cavity after passing through the transition piece, and finally flows out from the switch valve to achieve pressure relief, and the powder will not be directly blown out to the outside under the blocking of the filter element. After the pressure relief is completed, the switch valve is closed, and the powder accumulated on the filter element falls into the lower cavity under the action of gravity. At this time, the airflow blown out from the feeding pipe takes away the fallen powder into the vacuum feeding device, thereby improving the conveying rate of the powder.

[0009] As a further improvement of the above technical solution, the filter element is a filter cartridge connected to the partition, and the filter cartridge is surrounded by a filter cavity with an opening facing upward. The cylindrical structure formed by the filter cartridge can increase the area for filtering and adsorbing the airflow in the lower cavity, thereby improving the pressure relief efficiency.

[0010] As a further improvement of the above technical solution, a back-blower is provided on the partition plate, and the back-blower is used to blow air into the filter cavity. After closing the switch valve, the back-blower can blow air into the filter cavity to blow off the powder attached to the outer surface of the filter element, which can effectively reduce the powder accumulated on the surface of the filter element and further improve the powder conveying rate.

[0011] As a further improvement of the above technical solution, a first air pressure sensor is provided in the vacuum feeding device, which can monitor the air pressure in the vacuum feeding device in real time, thereby facilitating manual or automatic control of the switch valve to release pressure.

[0012] As a further improvement of the above technical solution, the air supply device includes an air pump and an air supply connector, the air supply connector is connected to the feed pipe at an angle in the direction close to the feed inlet, and the air pump is connected to the air supply connector. The air supply connector is connected to the feed pipe at an angle, which is conducive to the air flow input into the feed pipe by the air pump through the air supply connector to flow in the direction of the vacuum feeding device. The high-pressure air flow input by the air pump can not only blow away the blocked powder in the feed pipe, but also assist in the transportation of the powder.

[0013] As a further improvement of the above technical solution, a pressure control valve is provided on the gas delivery connector, through which the pressure of the air flow input from the gas delivery connector to the feed pipe can be adjusted, so that it can be conveniently adjusted according to the length of the feed pipe or the powder delivery amount.

[0014] As a further improvement of the above technical solution, there are multiple gas delivery connectors, and the multiple gas delivery connectors are arranged at intervals along the length direction of the material delivery pipe. The air pump can deliver gas from the multiple gas delivery connectors to the material delivery pipe, thereby realizing segmented auxiliary delivery of the material delivery pipe and improving flexibility during use.

[0015] As a further improvement of the above technical solution, a second air pressure sensor is provided on the conveying pipe at a position behind the plurality of air delivery connectors. The second air pressure sensor can detect the air pressure at the rear section of the conveying pipe at the air delivery connector. When the second air pressure sensor detects that the pressure at the position is too high, that is, the powder is blocked, the air flow rate input from the air delivery connector at the front side can be opened or increased to blow away the powder.

[0016] As a further improvement of the above technical solution, the vacuum feeding device includes a feeding machine and a vacuum pump, and an air pipe is connected between the vacuum pump and the feeding machine. The vacuum pump forms a negative pressure inside the feeding machine through the air pipe, so that the powder is fed into the feeding machine from the feeding pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following is a brief description of the drawings required for the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present utility model, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0018] Figure 1 It is an overall stereogram of the utility model.

[0019] In the attached drawings: 1-feeder, 11-feeding pipe, 21-gas supply connector, 22-second air pressure sensor, 31-pressure relief housing, 32-upper cavity, 33-lower cavity, 34-filter, 41-feeder, 42-vacuum pump. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection relationships mentioned in the text do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connecting accessories according to the specific implementation situation. The various technical features in the invention can be combined interchangeably without conflicting with each other.

[0021] Reference Figure 1 A powder conveying and feeding system comprises: a vacuum feeding device, which is provided with a feed port; a feeder 1, which is provided with a discharge port, and a feeding pipe 11 is connected between the feed port and the discharge port; an air supply device, which is provided on the feeding pipe 11, and the air supply device can input an airflow from the feed port to the discharge port into the feeding pipe 11; a pressure relief device, which is provided on the feeding pipe 11, and the pressure relief device is located on a side closer to the vacuum feeding device relative to the air supply device, and a filtering flow channel connected to the feeding pipe 11 and the outside is provided in the pressure relief device.

[0022] In this powder feeding system, when feeding, feed is fed into the feeder 1, and negative pressure is formed in the vacuum feeding device. The powder of the feeder 1 is transported from the feeding pipe 11 to the vacuum feeding device under the action of negative pressure. During the feeding process of the powder, an air supply device can be used to input airflow into the feeding pipe 11. The airflow is transported from the feed port to the discharge port, which can assist in feeding the powder into the vacuum feeding device. Since air is supplied from the outside to the feeding pipe 11, the air pressure in the vacuum feeding device will eventually increase. Therefore, a pressure relief device is provided at a position close to the vacuum feeding device. The air pressure can be reduced through the filtering flow channel in the pressure relief device, and the direct discharge of the powder to the outside is reduced, thereby ensuring that the air pressure in the vacuum feeding device is within a normal range. In this way, the powder is transported by auxiliary airflow, which is also applicable to the longer feeding pipe 11. In addition, the air pressure in the vacuum feeding device can be stabilized by the pressure relief device, effectively avoiding the problem of excessive pressure in the vacuum feeding device and air leakage and powder emission at the sealing position.

[0023] The pressure relief device is mainly used to filter the air and discharge it to the outside. It can be a plurality of filter plates arranged in a tube to form a filtering flow channel. In the present embodiment, the pressure relief device includes a pressure relief shell 31, a partition and a filter element 34. The pressure relief shell 31 is connected to one side of the vacuum feeding device. The partition separates the pressure relief shell 31 in the up and down directions to form an upper cavity 32 and a lower cavity 33. The filter element 34 is arranged on the partition. The lower cavity 33 forms the filtering flow channel through the filter element 34 to the upper cavity 32. The partition is located on the outer side of the upper cavity 32 and is provided with a switch valve. The feed pipe 11 is connected to the feed port through the lower cavity 33. When it is necessary to relieve the pressure of the vacuum feeding device, the switch valve is opened. The air pressure in the lower cavity 33 is higher. The airflow flows into the upper cavity 32 after passing through the transition piece, and finally flows out from the switch valve to achieve pressure relief. The powder will not be directly blown out to the outside due to the obstruction of the filter 34. After the pressure relief is completed, the switch valve is closed. The powder accumulated on the filter 34 falls into the lower cavity 33 under the action of gravity. At this time, the airflow blown out from the feeding pipe 11 takes away the fallen powder and enters the vacuum feeding device, thereby improving the powder conveying rate.

[0024] In some embodiments, the filter element 34 is a filter cartridge connected to the partition, and the filter cartridge is surrounded by a filter cavity with an opening upward. The cylindrical structure formed by the filter cartridge can increase the area of ​​airflow filtration and adsorption in the lower cavity 33, thereby improving the pressure relief efficiency.

[0025] In order to facilitate the cleaning of the powder attached to the outer surface of the filter element 34, in this embodiment, a back-blower is provided on the partition plate, and the back-blower is used to blow air into the filter cavity. In practical applications, the back-blower can be a high-speed blower, a blow valve, etc. After closing the switch valve, the back-blower can blow air into the filter cavity to blow off the powder attached to the outer surface of the filter element 34, which can effectively reduce the powder accumulated on the surface of the filter element 34 and further improve the powder delivery rate.

[0026] In some embodiments, a first air pressure sensor is provided in the vacuum feeding device, and the air pressure in the vacuum feeding device can be monitored in real time by the first air pressure sensor, so as to facilitate manual or automatic control of the switch valve to release pressure.

[0027] The air supply device is mainly used to blow air into the feeding pipe 11. Specifically, the air supply device includes an air pump and an air supply connector 21. The air supply connector 21 is connected to the feeding pipe 11 at an angle close to the feeding port, and the air pump is connected to the air supply connector 21. The air supply connector 21 is connected to the feeding pipe 11 at an angle, which is conducive to the air flow input into the feeding pipe 11 by the air pump through the air supply connector 21 to flow in the direction of the vacuum feeding device. The high-pressure air flow input by the air pump can not only blow away the blocked powder in the feeding pipe 11, but also assist in the transportation of the powder.

[0028] When the path for auxiliary powder delivery is long, it is necessary to adjust the air flow pressure of the feed pipe 11 to be larger, or when there are many positions where powder blocks the feed pipe 11, it is necessary to adjust the air flow pressure of the feed pipe 11 to be larger. Therefore, in this embodiment, a pressure control valve is provided on the air delivery connector 21. The pressure control valve can adjust the air flow pressure input from the air delivery connector 21 to the feed pipe 11, so that it can be conveniently adjusted according to the length of the feed pipe 11 or the powder delivery amount.

[0029] In some embodiments, there are multiple gas delivery connectors 21, and the multiple gas delivery connectors 21 are arranged at intervals along the length direction of the material delivery pipe 11. The air pump can deliver gas from the multiple gas delivery connectors 21 to the material delivery pipe 11, thereby realizing segmented auxiliary delivery of the material delivery pipe 11 and improving flexibility during use.

[0030] In the above embodiment, a constant air flow pressure can be maintained from multiple air delivery connectors 21 to the feed pipe 11. In order to achieve energy saving, air can be delivered at different positions of the feed pipe 11 according to actual needs, for example, air flow can be input according to different blocked positions in the feed pipe 11. Specifically, a second air pressure sensor 22 is provided at a position on the feed pipe 11 located at the rear side of the multiple air delivery connectors 21. The second air pressure sensor 22 can detect the air pressure at the rear section of the feed pipe 11 located at the air delivery connector 21. When the second air pressure sensor 22 detects that the pressure at the position is too high, that is, the powder is blocked, the air flow input from the front air delivery connector 21 can be opened or increased to blow away the powder.

[0031] In some embodiments, the vacuum feeding device includes a feeder 41 and a vacuum pump 42, and an air pipe is connected between the vacuum pump 42 and the feeder 41. The vacuum pump 42 forms a negative pressure inside the feeder 41 through the air pipe, so that the powder is input from the feeding pipe 11 into the feeder 41.

[0032] The preferred implementation modes of the present invention are specifically described above, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A powder material conveying and feeding system, characterized in that: include: A vacuum feeding device, which is provided with a feeding port; A feeder (1) is provided with a discharge port, and a feed pipe (11) is connected between the feed port and the discharge port; an air supply device, which is arranged on the conveying pipe (11), and the air supply device can input an airflow from the feed inlet to the discharge outlet into the conveying pipe (11); A pressure relief device is arranged on the material conveying pipe (11), the pressure relief device is located closer to the vacuum feeding device relative to the air supply device, and a filtering flow channel connected to the material conveying pipe (11) and the outside is arranged in the pressure relief device.

2. A powder material conveying and feeding system according to claim 1, characterized in that: The pressure relief device comprises a pressure relief shell (31), a partition and a filter element (34); the pressure relief shell (31) is connected to one side of the vacuum feeding device; the partition separates the pressure relief shell (31) in the up and down directions to form an upper cavity (32) and a lower cavity (33); the filter element (34) is arranged on the partition; the lower cavity (33) forms the filtering flow channel through the filter element (34) to the area of ​​the upper cavity (32); the partition is provided with a switch valve at the outer position of the upper cavity (32); the feed pipe (11) is connected to the feed port through the lower cavity (33).

3. A powder material conveying and feeding system according to claim 2, characterized in that: The filter element (34) is a filter cartridge connected to the partition plate, and the filter cartridge is surrounded to form a filter cavity with an opening facing upward.

4. A powder material conveying and feeding system according to claim 3, characterized in that: A backblower is provided on the partition plate, and the backblower is used for blowing air into the filter cavity.

5. A powder material conveying and feeding system according to claim 1, characterized in that: A first air pressure sensor is arranged in the vacuum feeding device.

6. A powder material conveying and feeding system according to claim 1, characterized in that: The air supply device comprises an air pump and an air delivery connector (21); the air delivery connector (21) is connected to the material delivery pipe (11) at an angle in a direction close to the material feed port; and the air pump is connected to the air delivery connector (21).

7. A powder material conveying and feeding system according to claim 6, characterized in that: The gas delivery connector (21) is provided with a pressure control valve.

8. A powder material conveying and feeding system according to claim 6, characterized in that: There are a plurality of gas delivery connectors (21), and the plurality of gas delivery connectors (21) are arranged at intervals along the length direction of the material delivery pipe (11).

9. A powder material conveying and feeding system according to claim 8, characterized in that: A second air pressure sensor (22) is provided on the material delivery pipe (11) at a position located behind the plurality of air delivery connectors (21).

10. A powder material conveying and feeding system according to claim 1, characterized in that: The vacuum feeding device comprises a feeding machine (41) and a vacuum pump (42), and an air pipe is connected between the vacuum pump (42) and the feeding machine (41).

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