CN210755161U

CN210755161U - Quantitative powder feeding device

Info

Publication number: CN210755161U
Application number: CN201920808663.4U
Authority: CN
Inventors: 黄颢; 徐国军; 王云能; 翁辉
Original assignee: Lingfan New Energy Technology Beijing Co ltd
Current assignee: Dongjun new energy Co.,Ltd.
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-06-16
Anticipated expiration: 2029-05-31

Abstract

The utility model provides a powder device is sent to ration relates to the technical field of target preparation, can solve the unable problem that realizes the ration and carry of current CIG powder. The quantitative powder feeding device comprises: the powder feeding device comprises a powder feeding drum, a base and a driving device, wherein a plurality of powder containing cavities surrounding the peripheral surface of the powder feeding drum are formed on the powder feeding drum; a cavity for accommodating the powder feeding drum, and a powder inlet and a powder outlet which are communicated with the cavity are formed in the base; the powder feeding drum is fixed in the cavity and can rotate relative to the base; the driving device is used for driving the powder feeding drum to rotate; the base is further provided with an air inlet channel, and the air inlet channel is used for forming air flow for purging the powder containing cavity.

Description

Quantitative powder feeding device

Technical Field

The utility model relates to a technical field of target preparation especially relates to a ration powder feeding device.

Background

The copper indium gallium target material is generally used for preparing a light absorption layer of a copper indium gallium selenide solar cell. Copper indium gallium target material preparation usually requires preparing copper indium gallium powder (CIG powder) first.

In the field of CIG powder transmission, gravity type and scraping disc type quantitative powder feeder are common. When the two quantitative powder feeding devices are used for conveying the CIG powder, quantitative conveying cannot be realized, powder feeding openings are often blocked due to agglomeration of the powder, and therefore the CIG powder is low in conveying efficiency and is wasted.

Disclosure of Invention

In order to solve the problem, the present disclosure provides a quantitative powder feeding device, which can solve the problem that the quantitative conveying of the existing CIG powder cannot be realized.

The embodiment of the present disclosure provides a quantitative powder feeding device, including: the powder feeding device comprises a powder feeding drum, a base and a driving device, wherein a plurality of powder containing cavities surrounding the peripheral surface of the powder feeding drum are formed on the powder feeding drum; a cavity for accommodating the powder feeding drum, and a powder inlet and a powder outlet which are communicated with the cavity are formed in the base; the powder feeding drum is fixed in the cavity and can rotate relative to the base; the driving device is used for driving the powder feeding drum to rotate; the base is further provided with an air inlet channel, and the air inlet channel is used for forming air flow for purging the powder containing cavity.

The quantitative powder feeding device provided by the embodiment of the disclosure realizes quantitative powder feeding through the powder containing cavity on the rotatable powder feeding drum, and utilizes gas to purge the powder containing cavity on the powder feeding drum, so that powder is prevented from being adhered to the powder containing cavity or blocking the powder outlet, and the problem that the quantitative conveying of the existing CIG powder cannot be realized can be solved.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the embodiments of the present invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention and not to limit the embodiments of the invention.

Fig. 1 is a schematic structural diagram of a quantitative powder feeding device provided by the present disclosure;

FIG. 2 is a first schematic diagram of the quantitative powder feeding device provided by the present disclosure;

FIG. 3 is a second schematic diagram of the quantitative powder feeder provided by the present disclosure;

FIG. 4 is a schematic structural diagram of another quantitative powder feeding device provided by the present disclosure;

FIG. 5 is a schematic structural view of another quantitative powder feeding device provided by the present disclosure;

FIG. 6 is an exploded view of the powder metering device shown in FIG. 5;

FIG. 7 is a schematic structural view of a powder feed drum according to some embodiments of the present disclosure;

FIG. 8 is a schematic view of a recessed structure provided in some embodiments of the present disclosure;

FIG. 9 is a schematic structural view of a paddle according to some embodiments of the present disclosure;

figure 10 shows an enlarged detail of tip a of figure 9.

Detailed Description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.

An embodiment of the present disclosure provides a quantitative powder feeding device, as shown in fig. 1, the device including: a base 20 and a powder feeding drum 10 arranged on the base 20. The powder feeding drum 10 is formed with a plurality of powder containing chambers 101 surrounding the outer peripheral surface of the powder feeding drum 10. A cavity 21 for accommodating the powder feeding drum 10, and a powder inlet 22 and a powder outlet 23 which are communicated with the cavity 21 are arranged in the base 20; the powder feeding drum 10 is fixed in the cavity 21, and the powder feeding drum 10 can rotate relative to the base 20; the driving device is used for driving the powder feeding drum 10 to rotate; wherein, the base 20 is further provided with an air inlet channel 24, and the air inlet channel 24 is used for forming air flow for purging the powder containing cavity 101.

The base 20 is mainly used for forming a cavity 21, and the powder feeding drum 10 is arranged in the cavity 21 and can rotate relative to the base 20. The edge of the cavity 21 is formed with a powder inlet 22 and a powder outlet 23 which communicate with the cavity 21. The powder feeding drum 10 is driven by the driving device to rotate relative to the base 20, the powder accommodating cavity 101 on the powder feeding drum 10 of the powder inlet 2 receives powder, and when the powder feeding drum rotates to the powder outlet 23, the powder in the powder accommodating cavity 101 is unloaded. The present disclosure is not limited to the specific structure of the base 20. For example, the regions shown by oblique lines in fig. 1 may be solid or hollow. In some embodiments, the base 20 comprises a wall 200, the wall 200 forms a cavity 21, the wall 200 is made of a material which is not easy to adhere to powder, the powder feeding drum 10 is arranged in the cavity 21, and the gap between the powder feeding drum 10 and the wall 200 is small so as not to influence the rotation of the powder feeding drum 10 and remove the excessive powder protruding from the powder containing cavity 101.

The base 20 is further provided with an air inlet channel 24, and the air inlet channel 24 is used for introducing air to form air flow for purging the powder containing cavity 101. In some embodiments, the air inlet passage 24, the cavity 21, the powder inlet 22 and the powder outlet 23 may be formed together when the base 20 is formed. For example, the base 20 provided with the air intake passage 24, the cavity 21, the powder inlet 22, and the powder outlet 23 is integrally molded. In some embodiments, the air intake passage 24 may be manufactured separately and then installed into the base 20.

The structure of the air inlet passage 24 is not limited, and may be any structure that is easy to purge the powder containing chamber 101. In some embodiments, the air outlet of the air inlet channel 24 extends in a direction tangential to the outer circumferential surface of the powder feeding drum 10. Thus, the air inlet passage 24 can form a purge air flow tangential to the outer peripheral surface of the powder feeding drum 10, and due to the purge air flow, the air pressure below the powder containing chamber 101 of the powder feeding drum 10 at the tangential position to the purge air flow is reduced, and the powder in the powder containing chamber 101 is easy to pour out.

In some embodiments, the powder inlet 22 and the powder outlet 23 are symmetrical with respect to the axial center of the powder feeding drum 10, that is, in the cross-sectional view of the powder feeding drum 10, the connecting line of the powder inlet 22 and the center of the powder feeding drum 10 and the connecting line of the powder outlet 23 and the center of the powder feeding drum 10 form an angle of 180 °.

In some embodiments, the inlet of the inlet channel 24 is adapted to communicate with a first source of air, and the outlet of the inlet channel 24 extends in a direction tangential to the outer peripheral surface. The gas of the first gas source may be selected by one skilled in the art based on the powder characteristics. For CIG powders, the first gas source may be, for example, a source of high pressure nitrogen gas.

As shown in fig. 3 and 4, in some embodiments, a powder discharging area 26 is formed at the powder outlet 23, and the powder outlet 23 is opposite to the powder discharging area 26. In some embodiments, wall 200 is recessed inwardly to form a powder discharge area 26, and the volume of powder discharge area 26 is greater than the volume of powder containing cavity 101.

In some embodiments, a powder outlet channel 25 connected to the powder discharging area 26 is further disposed in the base 20, and the powder outlet channel 25 is communicated with the powder outlet 23 through the powder discharging area 26.

In some embodiments, the powder discharge area 26 is located between the powder outlet channel 25 and the air outlet of the air inlet channel 24.

As shown in fig. 1 to 3, the working principle of the quantitative powder feeding device provided by the present disclosure is illustrated. The powder feed drum 10 rotates counterclockwise in the cavity 1. Fig. 1 shows a scenario in which powder starts to enter the powder containing chamber 101 of the powder containing chamber 101. Fig. 2 shows a situation in which the powder is continuously metered into the subsequent powder containing chamber 101 as the powder feeding drum 10 rotates. Fig. 3 shows a situation in which the powder containing chamber 101 filled with powder is turned to the powder outlet 23 and powder is quantitatively fed in accordance with the rotation of the powder feeding drum 10. Gas such as high-pressure nitrogen enters from the gas inlet of the gas inlet channel 24 and is sprayed from the gas outlet of the gas inlet channel 24 along the gas inlet channel 24 to form a gas flow. The powder in the powder containing chamber 101 flows from the powder containing chamber 101 to the powder outlet channel 25 and is discharged under the action of gravity and the air flow ejected from the air outlet of the air inlet channel 24.

In some embodiments, as shown in fig. 7, the powder feeding drum 10 has a cylindrical shape, and the powder containing cavity 101 is a recessed structure formed on the outer circumferential surface of the cylindrical powder feeding drum 10. The specific shape of the recessed structure is not limited, and may be any structure that facilitates powder transport. For example, the recessed feature may be a groove. Further, as shown in fig. 8, the bottom of the cross section of the groove is arc-shaped, so that the powder in the powder containing cavity 101 is easily poured out under the action of the air flow. In some embodiments, the bottom of the groove is smooth and is sprayed with a material that does not readily adhere to powder. The material to which the powder does not easily adhere may be, for example, polytetrafluoroethylene.

In some embodiments, the base 20 includes: and the side plates 21 are used for sealing the cavity 21 in the base 20 and preventing powder from flying out of the openings at two ends of the cavity 21.

In some embodiments, as shown in fig. 4, the powder inlet 22 of the base 20 is further provided with a hopper 30 for receiving powder.

In some embodiments, a paddle 40 is provided in the hopper 30 to turn the powder over and avoid agglomeration of the powder. Further, the stirring paddle driving device is used for driving the stirring paddle.

In some embodiments, paddle 40 comprises: a stirring shaft 41, a horizontal stirring paddle 45 and a bottom stirring paddle 46. The stirring shaft 41 is fixed on the hopper cover 31 and is in transmission connection with the stirring paddle driving device (such as a first servo motor 50); the horizontal stirring paddle 45 is arranged perpendicular to the stirring shaft 41 and fixed on the stirring shaft 41; the bottom stirring paddle 46 is arranged along the extending direction of the stirring shaft 41 and fixed at the bottom of the stirring shaft 41.

In some embodiments, as shown in fig. 9, the paddle 40 may include: a stirring shaft 41, a horizontal stirring paddle 45 and a bottom stirring paddle 46. The stirring shaft 41 is fixed on the hopper cover 31 and is in transmission connection with the stirring paddle driving device (such as the first servo motor 50). Three horizontal paddles 45 are provided, a first horizontal paddle 42, a second horizontal paddle 43, and a third horizontal paddle 44. The first to third horizontal agitating blades are respectively located at the upper, middle and lower ends of the agitating shaft 41. The bottom stirring paddle 46 is fixed to the end of the stirring shaft 41 and is disposed along the extending direction of the stirring shaft 41.

Fig. 10 is a schematic view of the bottom paddle 46. As shown in fig. 10, in some embodiments, the bottom paddle 46 comprises: a first paddle 461 and a second paddle 462 arranged partially one above the other; the ends of the first blade 461 and the second blade 462 far away from the stirring shaft 41 are both in a pointed shape. The bottom stirring paddle 46 adopts a flat plate double-paddle design shown in fig. 10, and the bottom end of the flat plate double-paddle adopts an oblique angle design, which does not affect the powder entering the powder containing cavity 101, and can squeeze and scrape the powder at least to a certain extent, so that the powder uniformly enters the powder containing cavity 101.

In some embodiments, the bottom paddle 46 of FIG. 10 may also include a two-part structure similar to the first blade 461 and the second blade 462, i.e., the bottom paddle 46 of FIG. 10 is integrally formed to achieve the same result.

In some embodiments, the bottom stirring paddle 46 is fixed at the end of the stirring shaft 41, and the stirring shaft 41 is connected with the bottom stirring paddle 46 at a large oblique angle, that is, the end of the stirring shaft 41 is formed with a slope, and the stirring shaft 41 transitions to the bottom stirring paddle 46 through the slope, so that the powder at the end region of the stirring shaft 41 can move downwards when the stirring paddle rotates, and the powder can better enter the powder containing cavity 101 of the powder feeding drum 10. For example, the inclined surface forms an angle of 120 ° or more with the stirring shaft 41.

In other embodiments, for example, the bottom paddle 46 may also be helical as shown in FIG. 3. The helical bottom paddles rotate to move the powder downward in this area to better force the powder into the powder holding chamber 101 of the powder feed drum 10.

In some embodiments, the hopper 30 further comprises: a pressurized gas inlet. The pressurized gas inlet is arranged at the upper part of the hopper 30 far away from the powder outlet 23 and is used for being communicated with a second gas source. Further, a pressure regulating valve 60 and a pressure gauge are installed on a pipeline between the second air source and the air inlet. The second gas source is, for example, a high pressure nitrogen gas source.

In some embodiments, as shown in FIG. 5, a paddle 40 is disposed in the hopper 30, and a vibrator 70 is also disposed at the bottom of the hopper 30. When the quantitative powder feeding device works, gas can pass through the hopper 30 from the upper part, the stirring paddle 40 is driven to rotate, and under the combined action of high-frequency vibration generated by the vibrator 70 outside the hopper 30, powder can continuously overturn and flow in the hopper, so that the powder is kept in a loose state in the hopper and is not easy to agglomerate.

In order that those skilled in the art will better understand the disclosure, the powder metering device in the embodiments of the disclosure is described below by way of specific examples.

Since the CIG powder is sticky and easy to agglomerate, the CIG powder cannot be quantitatively conveyed and is often easy to stick on a quantitative powder feeding device to block the hopper 30 and the powder feeding pipe, and the application difficulty of the CIG powder is increased.

As shown in fig. 5 and 6, some embodiments of the present disclosure provide a quantitative powder feeding device for CIG powder, which mainly comprises a first servo motor 50, a hopper cover 31, a stirring paddle 40, a hopper 30, a base 20, a powder feeding drum 10, a pressure regulating valve 60, a side plate 21, a vibrator 70 and a second servo motor 90.

A columnar cavity 21 is arranged in the base 20, a powder feeding drum 10 is arranged in the columnar cavity 21, and the powder feeding drum 10 can rotate relative to the base 20. The two sides of the columnar cavity 21 are provided with side plates 21, and the side plates 21 are provided with mounting holes and bearings. The side plate 21 is used to rotatably fix the powder feeding drum 10. The side plates 21 can also be used to fit into the openings at both ends of the cylindrical cavity 21 to prevent powder from flying out of the openings at both ends of the cylindrical cavity 21. The top of the base 20 is provided with a powder inlet 22 communicated with the cavity 21; a powder outlet 23 is provided at the bottom of the cavity 21 at a position opposite to the powder inlet 22. The specific structure of the base 20 can be seen from the above embodiments, and will not be described in detail.

As shown in fig. 6, a plurality of powder containing cavities 101 are provided in the middle of the powder feeding drum 10, and the powder containing cavities 101 are arranged along the periphery of the powder feeding drum 10. Three grooves 102 are provided at both ends of the powder feeding drum 10, and extend around the outer circumferential surface of the powder feeding drum 10. The powder feeding drum 10 is provided with mounting shafts 103 on the side surfaces of both ends, and the powder feeding drum 10 is fixed on the side plate 21 of the base 20 through the mounting shafts 103. The mounting shaft 103 is rotatably coupled to the side plate 21. The grooves 102 in the powder feed drum 10 can contain powder and prevent powder from entering the external environment along the powder feed drum 10 from the openings at both ends of the cavity 21.

The powder inlet 22 of the base 20 is provided with a hopper 30. The hopper 30 is provided with a paddle 40 inside. The vibrator 70 is installed at the middle and lower portion of the hopper 30. The hopper cover 31 that matches is arranged on the upper opening of the hopper 30, the first servo motor 50 is installed on the hopper cover 31, the first servo motor 50 is connected with the stirring paddle 40, the rotating speed of the stirring paddle 40 can be adjusted according to the agglomeration condition of CIG powder, and the vibrator 70 installed on the middle lower part of the hopper 30 is matched to loosen the powder. The vibrator 70 is, for example, a pneumatic vibrator. The pneumatic vibrator is driven by gas to oscillate to drive the hopper to vibrate, so that the sticky powder is not easy to attach to the inner wall of the quantitative powder feeding device, and the powder which is easy to agglomerate is dispersed. The pneumatic vibrator can be connected with a pressure regulating valve, and the vibration force provided by the pneumatic vibrator can be adjusted through the pressure regulating valve.

The top cover of the quantitative powder feeder or the upper part of the hopper 30 can be loaded with an air inlet pipeline, a pressure regulating valve 60 and a pressure gauge. The air inlet pipeline transmits nitrogen, and the aim of loading CIG powder is fulfilled by the pressure difference generated between the upper end and the lower end of the quantitative powder feeding device. A pressure regulating valve 60 and a pressure gauge installed at the top end region of the quantitative powder feeder, for precisely controlling the gas pressure inside the quantitative powder feeder.

The quantitative powder feeder introduces high-pressure nitrogen gas into the hopper 30 from the top of the powder, so that a pressure difference is formed between a feed port and a discharge port in the quantitative powder feeder. Meanwhile, the directional stirring paddle 40 is arranged in the middle of the hopper 30, under the combined action of high-frequency vibration generated by a vibrator outside the hopper 30, the CIG powder is enabled to continuously flow in the hopper 30 in a turnover mode, and the powder is enabled to be kept in a loose state in the hopper 30 of the quantitative powder feeding device and not to easily agglomerate.

The quantitative powder feeding drum 10 is arranged in a base 20 at the bottom of the hopper 30, the base 20 is made of high-strength PTFE material and is in transition fit with the quantitative powder feeding drum 10, and the self-lubricating property and the wear resistance of the PTFE material are fully utilized to realize quantitative loading of powder and sealing of a cavity. The quantitative powder feeding drum 10 is driven by the second servo motor 90, the volume of the powder containing cavity 101 is constant, when the powder containing cavity 101 passes through the bottom (the powder inlet 22) of the hopper 30, quantitative powder is loaded, and after the powder feeding drum 10 rotates 180 degrees, the powder enters the powder outlet at the lower part of the quantitative powder feeding device, so that quantitative powder feeding is realized. The amount of powder delivered can be accurately metered according to the rotation speed of the powder feeding drum 10.

The bottom of the cavity 21 of the base 20 is opened and has a size slightly larger than that of the powder chamber 101 of the powder metering drum 10. When a powder containing chamber 101 is located right below the opening of the base 20 (powder unloading area), the powder in the powder containing chamber 101 is completely delivered in a metering mode. Nitrogen is introduced from the lower part inside the base 20 through the air inlet channel 24, and the pressure and the flow of the nitrogen introduced from the air inlet channel 24 are controlled by a pressure regulating valve 60 and a pressure gauge which are arranged on the side surface of the base 20, so that the powder containing cavity 101 is forcibly purged by airflow formed by the air inlet channel 24 and enters the powder outlet channel 25 along the powder discharging area 26.

Through introducing gas for pressurization, the oscillator vibrates at high frequency, the stirring paddle 40 rotates to cause the powder in the quantitative powder feeding device to continuously flow directionally, and meanwhile, the CIG powder is not easy to attach to the wall of the quantitative powder feeding device, so that the powder agglomeration phenomenon is avoided. Due to the special paddle design at the bottom of the stirring paddle 40, the powder above the powder containing cavity 101 tends to move downwards, and a good powder filling effect is achieved. The base 20 is made of PTFE material and is in transition fit design. When the powder feeding drum 10 moves relative to the base 20, the base 20 can well scrape the excessive powder on the powder containing cavity 101, and the accuracy of quantitative powder is ensured. The elasticity and the self-lubricity of the PTFE material of the base 20 are combined through the transition fit design, so that the powder in the powder containing cavity 101 can be ensured to be sealed to a certain degree in the relative motion with the base 20, the powder can not enter a gap between the powder containing cavity and the base, the mechanical blocking is caused, the surface of the powder feeding drum 10 or the base 20 is damaged, and the quantitative accuracy of the powder is ensured. When the powder containing cavity 101 with powder rotates to the powder outlet below the base 20, the powder containing cavity 101 is purged by high-speed gas entering along the tangential direction of the powder feeding drum 10 through the gas inlet channel, and when the powder containing cavity 101 continues to rotate for a certain angle to reach the position near the powder outlet, a negative pressure area with a certain degree is formed near the powder outlet due to the action of opposite tangential high-speed gas flow, so that the powder in the powder containing cavity 101 is completely introduced into the bottom of the base 20 from the powder containing cavity 101, and the accuracy of quantitative conveying is ensured. The CIG powder to be conveyed is conveyed quantitatively and controllably through the counting of the powder containing cavity 101 of the quantitative powder conveying drum 10 at the bottom of the quantitative powder conveying device.

Some embodiments of the present disclosure also provide a quantitative powder feeding method, including:

introducing a first inert gas into the upper part of a hopper 30 of a quantitative powder feeding device for feeding, and driving powder to move towards a powder outlet of the quantitative powder feeding device by adjusting the pressure of the first inert gas in the hopper 30;

meanwhile, the powder in the hopper 30 flows in an overturning way through the stirring paddle 40 in the hopper 30 and the vibrator arranged on the hopper 30, so that the powder is prevented from agglomerating;

at the powder outlet 23 of the quantitative powder feeding device, the powder containing cavity 101 of the quantitative powder feeding device is purged by inert gas, so that the powder in the powder containing cavity 101 is more thoroughly unloaded.

The quantitative powder feeding device provided by the disclosure can effectively disperse powder which is easy to agglomerate, avoids powder agglomeration to block a powder feeding pipe, and improves the powder feeding efficiency and the powder utilization rate by accurate metering.

Although the embodiments of the present invention have been described above, the description is only for the convenience of understanding the present invention, and the present invention is not limited thereto. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A quantitative powder feeding device is characterized by comprising:

a powder feeding drum, wherein a plurality of powder containing cavities surrounding the peripheral surface of the powder feeding drum are formed on the powder feeding drum;

the powder feeding device comprises a base, wherein a cavity for accommodating the powder feeding drum, and a powder inlet and a powder outlet which are communicated with the cavity are formed in the base; the powder inlet and the powder outlet are symmetrical about a central axis of the powder feeding drum, the powder feeding drum is fixed in the cavity and can rotate relative to the base;

the driving device is used for driving the powder feeding drum to rotate;

the base is further provided with an air inlet channel, and the air inlet channel is used for forming air flow for purging the powder containing cavity.

2. A quantitative powder feeding device according to claim 1, wherein the inlet of the air inlet passage is adapted to communicate with a first air source, and the outlet of the air inlet passage extends in a direction tangential to the outer peripheral surface of the powder feeding drum.

3. A quantitative powder feeding device as claimed in claim 1, wherein the powder feeding drum is cylindrical, and the powder containing chamber has a recessed structure formed on an outer peripheral surface of the cylindrical powder feeding drum.

4. A powder metering device as claimed in claim 3, wherein the recess is a groove having an arcuate cross-sectional bottom.

5. A quantitative powder feeder according to claim 3, wherein both ends of the powder feeding drum are provided with at least one groove around the extension of the outer circumferential surface of the powder feeding drum.

6. A quantitative powder feeder according to claim 1,

the base is made of polytetrafluoroethylene;

the base is in transition fit with the powder feeding drum.

7. The quantitative powder feeding device according to any one of claims 1 to 6, further comprising:

the hopper is arranged at the powder inlet of the base.

8. The quantitative powder feeding device according to claim 7, further comprising: the stirring paddle is used for overturning the powder in the hopper; the stirring rake includes: the stirring shaft is fixed on the hopper cover and is in transmission connection with the stirring paddle driving device; the horizontal stirring paddle is perpendicular to the stirring shaft and is fixed on the stirring shaft; the bottom stirring paddle is arranged along the extension direction of the stirring shaft and is fixed at the bottom of the stirring shaft;

the bottom stirring paddle includes: the first blade and the second blade are partially overlapped; the first paddle and the second paddle are both pointed at the ends far away from the stirring shaft.

9. The quantitative powder feeding device according to claim 7, further comprising:

and the vibrator is arranged at the lower part of the hopper close to the powder outlet and is used for vibrating the hopper.

10. A quantitative powder feeder according to claim 7, wherein the hopper further comprises: the pressurized gas inlet is arranged at the upper part of the hopper far away from the powder outlet and is used for being communicated with a second gas source;

and a pressure regulating valve is arranged on a pipeline between the second gas source and the pressurized gas inlet.