Vacuum feeding machine for powder particles

Abstract

The application provides a vacuum feeding machine for powder particles, an internal stirring structure is installed in a material bucket, the bottom of the stirring structure extends to a discharge port of the material bucket, and the top of the stirring structure extends to the outside of a filter cartridge; when the stirring structure is rotated by a motor, the bottom stirs the material to prevent blockage, and the top stirs the wrinkled filter cloth outside the filter cartridge to shake off the adhered material; the wrinkled filter cloth outside the filter cartridge can be stirred, the external dust is conveniently shaken off, the stirring also loosens the particles at the filter holes, the cleaning effect of the filter cartridge is improved when the reverse blowing air bag sprays and cleans the filter cartridge, and the stirring action also has an effect of stirring the discharge port of the material bucket to prevent blockage and accelerate the discharge of the material.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of feeding machines, more particularly, to a vacuum feeding machine for powder particles. BACKGROUND

[0002] In the production process of feed additives, various powdery and granular raw materials often need to be mixed and processed, so it is inevitable to use a commonly used vacuum feeding machine to transport the materials. The existing vacuum feeding machine mainly includes two processing methods for cleaning the filter part. One is to disassemble and clean / replace the filter part. The other is to use a back-blowing air bag to clean the filter part by back-blowing. The former needs to be stopped for disassembly and cleaning / replacement, which is troublesome. The latter has a single back-blowing, and the blowing mainly acts on the dust particles stuck in the filter holes. The cleaning effect of the material adhered outside is not good, and the gas diffusion is large. The blowing amount at the bottom position is not enough, which also affects the cleaning effect. Therefore, it needs to be improved. SUMMARY

[0003] In order to overcome the defects of the prior art, the technical problem to be solved by the present application is to provide a vacuum feeding machine for powder particles, which has a novel structure. The external wrinkle filter cloth of the filter part can be stirred to facilitate the falling of the external dust. The stirring also loosens the particles in the filter holes, improving the cleaning effect of the back-blowing air bag. The stirring action also has an effect on the discharge port of the bucket, preventing clogging and accelerating the discharge of the material.

[0004] To achieve this purpose, the present application adopts the following technical solutions:

[0005] The vacuum feeding machine for powder particles provided by the present application comprises a bucket, a filter cartridge, a negative pressure pump and a back-blowing air bag. The negative pressure pump is used to form a negative pressure in the bucket. The material is sucked outside through the material suction pipe of the bucket. The material in the bucket is separated by the filter cartridge and falls to the bottom of the bucket. The back-blowing air bag is used to back-blow and clean the filter cartridge. The inside of the bucket is provided with a stirring structure. The bottom of the stirring structure extends to the discharge port of the bucket, and the top of the stirring structure extends to the outside of the filter cartridge. When the stirring structure is rotated by the motor, the bottom stirs the material to prevent clogging. The top stirs the wrinkle filter cloth outside the filter cartridge to shake off the adhered material.

[0006] In the preferable technical scheme of the present application, the middle part of the top surface of the hopper is provided with a through hole, the outer side of the through hole is provided with a supporting cylinder, the filter cylinder is installed in the inner part of the supporting cylinder, the inner part of the supporting cylinder is divided into a first chamber and a second chamber, the second chamber is located below the first chamber, the second chamber is communicated with the inner part of the hopper; the outer side of the top opening of the filter cylinder is fixedly provided with a cover plate, the cover plate is provided with a first air pipe communicated with the inner part of the filter cylinder; the air inlet of the negative pressure pump is communicated with a suction pipe, the air outlet of the back blowing air bag is communicated with an air outlet pipe, the suction pipe and the air outlet pipe are communicated with the first air pipe through a three-way pipe; the electromagnetic valve is installed on the suction pipe, the pulse valve is installed on the air outlet pipe; the top part of the stirring structure is inserted into the inner part of the second chamber, and the stirring structure is covered outside the filter cylinder; the motor is installed in the first chamber, the output shaft of the motor is drivingly connected with the top part of the stirring structure to drive the stirring structure to rotate.

[0007] In the preferable technical scheme of the present application, the stirring structure comprises a frame body, the outer side of the frame body is in a columnar contour structure, and the shape of the frame body is adapted to the shape of the second chamber; the inner wall of the through hole is fixedly provided with a supporting ring, the inner diameter of the supporting ring is smaller than the outer diameter of the frame body; the bottom part of the frame body is movably abutted against the top surface of the supporting ring, and the frame body is tightly rotated against the inner wall of the second chamber; the filter cylinder is located in the inner part of the frame body, and at least one scraping strip for stirring the pleated filter cloth is fixedly arranged on the inner wall of the frame body; the output shaft of the motor is drivingly connected with the frame body; the middle part of the bottom surface of the frame body is fixedly provided with a rotating shaft, the rotating shaft extends towards the bottom part of the hopper, and the bottom end side wall of the rotating shaft is provided with stirring blades.

[0008] In the preferable technical scheme of the present application, the frame body comprises a first supporting ring and a second supporting ring, the first supporting ring is located above the second supporting ring, the first supporting ring and the second supporting ring are fixedly connected through a plurality of vertical rods, and the diameters of the first supporting ring and the second supporting ring are adapted to the inner diameter of the second chamber; the outer wall of the first supporting ring is provided with a guide groove in a closed loop shape around the axis, the outer wall of the supporting cylinder is correspondingly provided with a plurality of threaded holes, the threaded holes are provided with guide bolts, the end parts of the guide bolts are provided with sliding surface columns inserted into the guide groove; one side of the inner ring of the first supporting ring is provided with a ring of teeth; the output shaft of the motor is drivingly connected with a speed reducer, the output shaft of the speed reducer extends into the second chamber, and the end part of the output shaft of the speed reducer is fixedly provided with a gear wheel, the gear wheel is drivingly engaged with the teeth of the first supporting ring;

[0009] The scraping strips are fixedly arranged on the wall surface of the vertical rod close to the center of the frame body; the inner ring of the second supporting ring is fixedly provided with a cross frame, and the rotating shaft is fixedly arranged on the center of the bottom surface of the cross frame.

[0010] In the preferable technical scheme of the present application, the stirring blades are in a triangular shape structure, the side of the stirring blades away from the rotating shaft is in an arc surface structure, and the shape of the arc surface structure is adapted to the shape of the inner wall of the bottom part of the hopper, and the lower end of the arc surface structure extends into the inner side of the discharge port; the number of the stirring blades is two, and the two stirring blades are symmetrically arranged about the axis of the rotating shaft, the two stirring blades are slidingly matched with the inner wall of the bottom part of the hopper, and the bottom part of the rotating shaft provides rotating support.

[0011] In the preferable technical scheme of the present application, the filter cartridge comprises a tray, a lug is fixedly arranged on the top outer side of the tray, and a cylindrical pleated filter cloth is fixedly arranged on the bottom end outer side of the through hole of the tray; a stepped portion is arranged on the inner wall of the middle portion of the support cylinder, the lug is tightly pressed on the top surface of the stepped portion and is fixedly connected through bolts, so that the inner portion of the support cylinder is divided into a first chamber and a second chamber; a cover plate is fixedly installed on the top end outer side of the through hole of the tray through bolts, and the top surface of the cover plate is fixedly arranged on a support frame for installing a motor and a speed reducer; a circular hole is arranged on the tray for penetrating the output shaft of the speed reducer.

[0012] In the preferable technical scheme of the present application, a plurality of scraping strips are fixedly arranged on the inner wall of the frame body, the plurality of scraping strips are linearly arrayed along the axial direction of the frame body, the maximum distance between the first and last scraping strips is greater than half the length of the filter cartridge, and the bottom surface of the lowermost scraping strip is lower than the bottom surface of the pleated filter cloth.

[0013] The present application has the following beneficial effects:

[0014] The vacuum feeding machine for powder particles provided in the present application is used for back blowing cleaning of the filter cartridge; the inside of the material bucket is provided with a stirring structure, the bottom of the stirring structure extends to the discharge port of the material bucket, and the top of the stirring structure extends to the outside of the filter cartridge; when the stirring structure is rotated by the motor, the bottom of the stirring structure stirs the discharge port of the material bucket, preventing blockage and accelerating material discharge;

[0015] The top of the stirring structure stirs the pleated filter cloth outside the filter cartridge, shakes off the adhered material, and shakes the particles in the filter holes, effectively improving the cleaning effect of the back blowing air bag during blowing cleaning, maintaining smooth ventilation of the filter cartridge, and ensuring sufficient negative pressure effect in the inside of the material bucket. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective structure schematic diagram of the vacuum feeding machine for powder particles provided in the embodiment of the present application;

[0017] Figure 2 is a perspective structure schematic diagram of the vacuum feeding machine for powder particles provided in the embodiment of the present application;

[0018] Figure 3 is a sectional view of the vacuum feeding machine for powder particles provided in the embodiment of the present application;

[0019] Figure 4 is a perspective structure schematic diagram of the cooperation state of the filter cartridge, the stirring structure and the motor provided in the embodiment of the present application;

[0020] Figure 5It is a schematic diagram of the three-dimensional structure of the filter cartridge, stirring structure, and motor in the unfolded state provided in a specific embodiment of the present invention;

[0021] Figure 6 is a schematic diagram of the three-dimensional structure of a stirring structure provided in a specific embodiment of the present invention;

[0022] In the picture:

[0023] 100, barrel; 110, perforation; 200, filter cartridge; 210, pleated filter cloth; 220, tray; 230, support ring; 300, negative pressure pump; 310, exhaust pipe; 400, backflush air bag; 410, outlet pipe;

[0024] 500, stirring structure; 510, frame; 511, first support ring; 512, second support ring; 513, vertical rod; 514, teeth; 515, cross; 520, scraper; 530, rotating shaft; 540, stirring blade;

[0025] 600, motor; 610, reduction gear box; 620, gear; 700, support tube; 710, first chamber; 720, second chamber; 730, step portion; 740, sealing plate; 800, cover plate; 810, first air pipe; 820, support frame. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0027] like Figures 1 to 3 As shown, a specific embodiment of the present invention discloses a vacuum loader for powder particles, including a barrel 100, a filter cartridge 200, a negative pressure pump 300, and a back-blowing air bag 400. The negative pressure pump is used to form a negative pressure inside the barrel, and suck the material outward through the suction pipe of the barrel. The material entering the barrel is precipitated through the filter cartridge and falls and is collected at the bottom of the barrel; the back-blowing air bag is used to back-blow and clean the filter cartridge; a stirring structure 500 is installed inside the barrel 100, and the bottom of the stirring structure 500 extends to the discharge port of the barrel 100, and the top of the stirring structure 500 extends to the outside of the filter cartridge 200; when the stirring structure 500 is driven to rotate by the motor 600, the bottom stirs the material to prevent clogging; the top stirs the pleated filter cloth 210 on the outside of the filter cartridge 200 to shake off the adhered material.

[0028] In the above-mentioned vacuum feeder for powder particles, the bottom of the stirring structure extends to the discharge port of the barrel, and the top of the stirring structure extends to the cover arranged on the outside of the filter cartridge; when the stirring structure is driven to rotate by the motor, the bottom of the stirring structure stirs the discharge port of the barrel, thereby preventing blockage and accelerating the discharge of materials;

[0029] The top of the stirring structure stirs the pleated filter cloth on the outside of the filter cartridge to shake off the adhering material. The shaking also loosens the particles at the filter holes, effectively improving the cleaning effect during the backflush air bag cleaning, maintaining smooth ventilation of the filter cartridge, and ensuring sufficient negative pressure inside the barrel.

[0030] Further, if Figures 2 to 5 As shown, a through hole 110 is provided in the middle of the top surface of the barrel 100, a support cylinder 700 is installed on the outside of the through hole 110, and the filter cartridge 200 is installed inside the support cylinder 700, dividing the interior of the support cylinder 700 into a first chamber 710 and a second chamber 720. The second chamber 720 is located below the first chamber 710, and the second chamber 720 is communicated with the interior of the barrel 100; the filter cartridge is used as a separating component to distinguish the pre-filtration area and the post-filtration area, which is more convenient for the design and layout of various structural components;

[0031] The outer side of the top opening of the filter cartridge 200 is fixedly installed with a cover plate 800, and the cover plate 800 is provided with a first air pipe 810 connected to the interior of the filter cartridge 200; the air inlet of the negative pressure pump 300 is connected with an exhaust pipe 310, and the air outlet of the back-blowing air bag 400 is connected with an exhaust pipe 410. The exhaust pipe and the exhaust pipe are connected to the first air pipe through a three-way pipe; an electromagnetic valve is installed on the exhaust pipe, and a pulse valve is installed on the exhaust pipe; the negative pressure pump draws air from the inside of the filter cartridge to form a negative pressure condition inside the entire material barrel, and then extracts the external powder particles through the suction pipe connected to the outside of the material barrel; when the filter cartridge needs to be back-blown and cleaned, the electromagnetic valve needs to be closed, the back-blowing air bag is inflated and pressurized, and after reaching the preset pressure value, the pulse valve is opened to quickly blow high-pressure gas into the filter cartridge, thereby achieving the effect of blowing and cleaning; it should be noted that the back-blowing air bag is a well-known instrument structure, which can be directly purchased and used on the market, and the details will not be described in detail;

[0032] The top of the stirring structure 500 extends into the interior of the second chamber 720, and the cover is arranged on the outside of the filter cartridge 200; the motor 600 is installed in the first chamber 710, and the output shaft of the motor is connected to the top of the stirring structure to drive the stirring structure to rotate; the motor is a driving component, and it is located in the first chamber in the post-filtration area, which effectively prevents dust particles from affecting the use of the motor.

[0033] Further, if Figures 3 to 6As shown, the stirring structure 500 includes a frame 510, the outer side of the frame 510 is in a cylindrical contour structure, and the shape is adapted to the shape of the second chamber 720; the inner wall of the perforated 110 is fixedly provided with a support ring 120, the inner diameter of the support ring is smaller than the outer diameter of the frame; the bottom of the frame 510 is movably supported on the top surface of the support ring 120, and the frame 510 is tightly attached to the inner wall of the second chamber 720; the frame as the main structure of the top area of the stirring structure, the bottom is supported by the support ring, and the side wall is tightly attached to the inner wall of the second chamber to effectively ensure the rotation of the overall support base; the output shaft of the motor is in transmission connection with the frame, which can shorten the transmission range, so as to design and layout each structural component, so that the overall structure is more compact; the filter cartridge 200 is located in the inside of the frame 510, and at least one scraping strip 520 for stirring the pleated filter cloth 210 is fixedly arranged on the inner wall of the frame 510; the filter cartridge does not affect the rotation of the frame, and on this basis, the pleated filter cloth can be pushed and scraped by the scraping strip, effectively shaking off the materials adhered outside; under this structure design and layout, each structural component is also in a relatively compact position; the bottom surface of the frame 510 is fixedly provided with a rotating shaft 530, the rotating shaft 530 extends towards the bottom of the bucket 100, and the bottom end of the rotating shaft 530 is provided with a stirring blade 540, which effectively stirs the materials collected at the bottom to prevent clogging.

[0034] Further, as shown in Figure 2 、 Figure 6 The frame 510 includes a first support ring 511 and a second support ring 512, the first support ring is located above the second support ring, the first support ring 511 and the second support ring 512 are fixedly connected by a plurality of vertical rods 513, and the diameters of the first support ring 511 and the second support ring 512 are adapted to the inner diameter of the second chamber 720; the structure of the frame is further limited, which on the one hand ensures sufficient structural strength, and on the other hand provides sufficient vacant positions without affecting normal air extraction and material falling;

[0035] The outer wall of the first support ring is provided with a guide groove in a closed loop around the axis, the outer wall of the support cylinder is correspondingly provided with a plurality of threaded holes, the threaded holes are provided with guide bolts, and the end of the guide bolt is provided with a sliding surface column for inserting into the guide groove; this structure design can further limit the cooperation of the frame and the support cylinder, the bottom of the frame is rotatably supported on the support ring, and the top is limited by a plurality of guide bolts, so that the frame is maintained in the required area for rotation, and the required transmission cooperation is ensured;

[0036] The inner ring side of the first support ring 511 is provided with a row of teeth 514; the output shaft of the motor 600 is in transmission connection with the reduction box 610, the output shaft of the reduction box 610 extends into the second chamber 720, and the end portion is fixedly installed with a gear 620, the gear 620 is in meshing transmission with the teeth 514 of the first support ring 511, and the scraping strip 520 is fixedly arranged on the wall surface of the vertical rod 513 close to the center side of the frame body 510; through the above-mentioned transmission cooperation, the structure of the frame body is designed, the overall cooperation is simple, the rotation around the set position is ensured, and the effective scraping and pushing action on the pleated filter cloth is realized; the inner ring of the second support ring 512 is fixedly arranged with a cross 515, and the rotating shaft 520 is fixedly arranged at the center of the bottom surface of the cross 515; the connection position of the cross and the rotating shaft is provided with a reinforcing rib for further strengthening the connection between the rotating shaft and the frame body and strengthening the overall structural strength.

[0037] Further, the stirring blade 540 is in a triangular shape structure, one side of the stirring blade 540 away from the rotating shaft 530 is in an arc surface structure, and is adapted to the shape of the bottom inner wall of the material barrel 100, and the lower end is inclined to extend into the inner side of the discharge port; the number of the stirring blade 540 is 2, and is symmetrically arranged about the axis of the rotating shaft 530, the two stirring blades are in sliding cooperation with the bottom inner wall of the material barrel, and the bottom of the rotating shaft provides rotation support; through the overall cooperation, the top and bottom of the stirring structure are limited, so that the stirring structure can stably rotate and swing, and the stirring blade can complete the stirring and anti-blocking action, and the scraper can complete the stirring and cleaning action.

[0038] Further, as shown in Figures 3 to 5 the filter cartridge 200 includes a tray 220, the outer side of the top of the tray 220 is fixedly provided with a supporting ring 230, and the bottom end of the through hole of the tray 220 is fixedly provided with a pleated filter cloth 210 in a columnar shape; the inner wall of the middle part of the supporting cylinder 700 is provided with a stepped portion 730, the supporting ring 230 is tightly pressed on the top surface of the stepped portion 730 and is fixedly connected through a bolt, so that the inner part of the supporting cylinder is divided into a first chamber and a second chamber; the cover plate 800 is fixedly installed on the outer side of the top end of the through hole 240 of the tray 220 through a bolt, the top surface of the cover plate 800 is fixedly arranged on a supporting frame 820 for installing a motor and a reduction box; the tray is provided with a circular hole for penetrating the output shaft of the reduction box; the structure of the filter cartridge is further limited, so that the filter cartridge is better matched with the supporting cylinder, and the motor and the reduction box are provided with installation positions, so that the assembly of various structural components is facilitated; it should be noted that the pleated filter cloth in a columnar shape is a common cylindrical filter structure, and the specific production mode is not described herein;

[0039] Further, the top of the supporting cylinder is open, so that the internal structure can be disassembled and arranged, and assembly and maintenance are facilitated; the open outer side is provided with a sealing plate for shielding and protecting the internal structure, so as to prevent dust in the external working environment from entering.

[0040] Further, as shown inFigure 6 As shown, the inner wall of the frame body 510 is correspondingly provided with a plurality of scraping strips 520, which are linearly arrayed along the axis direction of the frame body 510, the maximum spacing between the first and last scraping strips 520 is greater than half the length of the filter cartridge 200, and the bottom surface of the lowermost scraping strip 520 is lower than the bottom surface of the pleated filter cloth 210; the range of pushing and scraping is effectively expanded, the pleated filter cloth is effectively agitated and cleaned, the cleaning quality is improved, and the particles at the filter holes are fully loosened to facilitate the subsequent cleaning of the air bag.

[0041] The application is described through preferred embodiments, and those skilled in the art understand that various changes or equivalent replacements can be made to the features and embodiments without departing from the spirit and scope of the application. The application is not limited by the specific embodiments disclosed herein, and other embodiments falling within the claims of the application are within the protection scope of the application.

Claims

1. A vacuum feeder for powder particles, comprising a barrel, a filter cartridge, a negative pressure pump, and a back-flushing air bag. The negative pressure pump is used to create a negative pressure inside the barrel, sucking material outward through the barrel's extraction pipe. The material entering the barrel is separated out through the filter cartridge and falls to the bottom of the barrel; the back-flushing air bag is used to back-flushed the filter cartridge. The characteristics are: A stirring structure is installed inside the barrel. The bottom of the stirring structure extends to the discharge port of the barrel, and the top of the stirring structure extends to the cover outside the filter cartridge. When the stirring structure is driven by the motor to rotate, the bottom stirs the material to prevent clogging, and the top stirs the pleated filter cloth outside the filter cartridge to shake off the adhered material. A perforation is provided in the middle of the top surface of the barrel, a support cylinder is installed on the outside of the perforation, and the filter cartridge is installed inside the support cylinder, dividing the interior of the support cylinder into a first chamber and a second chamber. The second chamber is located below the first chamber and communicates with the interior of the barrel. A cover is fixedly mounted on the outer side of the top opening of the filter cartridge, and a first air pipe connected to the interior of the filter cartridge is provided on the cover; an air inlet of the negative pressure pump is connected to an air extraction pipe, and an air outlet of the back-blowing air bag is connected to an air outlet pipe, and the air extraction pipe and the air outlet pipe are connected to the first air pipe through a tee pipe; an electromagnetic valve is installed on the air extraction pipe, and a pulse valve is installed on the air outlet pipe; The stirring structure includes a frame, the outer side of the frame has a cylindrical profile structure, and the shape is adapted to the shape of the second chamber; a support ring is fixedly provided at the bottom of the perforated inner wall, and the inner diameter of the support ring is smaller than the outer diameter of the frame; the bottom of the frame movably abuts against the top surface of the support ring, and the frame rotates closely against the inner wall of the second chamber; the filter cartridge is located inside the frame, and at least one scraper for stirring the pleated filter cloth is fixedly provided on the inner wall of the frame; the output shaft of the motor is drivingly connected to the frame; A rotating shaft is fixedly provided in the middle of the bottom surface of the frame, and the rotating shaft extends toward the bottom of the barrel, and a stirring blade is provided on the side wall of the bottom end of the rotating shaft; The filter cartridge includes a tray, a support ring is fixed on the outer side of the top of the tray, and a columnar pleated filter cloth is fixed on the outer side of the bottom end of the through hole of the tray; A step portion is provided on the inner wall of the middle portion of the support tube, and the support ring is pressed tightly against the top surface of the step portion and fixedly connected by bolts, so that the interior of the support tube is divided into a first chamber and a second chamber; The cover is fixed to the outside of the top of the through hole of the tray by bolts, and a support frame for installing the motor and the reduction gearbox is fixed on the top surface of the cover; The tray is provided with a round hole for passing the output shaft of the reduction gearbox.

2. A vacuum feeder for powder particles according to claim 1, characterized in that: The top of the stirring structure extends into the interior of the second chamber, and the cover is arranged on the outside of the filter cartridge; the motor is installed in the first chamber, and the output shaft of the motor is transmission-connected with the top of the stirring structure to drive the stirring structure to rotate.

3. The vacuum feeder for powder particles according to claim 1, characterized in that: The frame includes a first support ring and a second support ring. The first support ring is located above the second support ring. The first support ring and the second support ring are fixedly connected by a plurality of vertical rods. The diameters of the first support ring and the second support ring are adapted to the inner diameter of the second chamber. The outer wall of the first support ring is provided with a guide groove in a closed loop around the axis, and the outer wall of the support tube is correspondingly provided with a plurality of threaded holes, guide bolts are installed at the threaded holes, and the ends of the guide bolts are provided with sliding surface columns for inserting into the guide grooves; A circle of teeth is provided on one side of the inner ring of the first support ring; the output shaft of the motor is connected to the reduction gearbox, the output shaft of the reduction gearbox extends into the second chamber, and a gear is fixedly installed on the end thereof, and the gear meshes with the teeth of the first support ring for transmission; The scraper strip is fixed on the wall surface of the vertical pole close to the center of the frame; A cross is fixedly mounted on the inner ring of the second supporting ring, and a rotating shaft is fixedly arranged at the center of the bottom surface of the cross.

4. The vacuum feeder for powder particles according to claim 1, characterized in that: The stirring blade is triangular in shape, and the side of the stirring blade away from the rotating shaft is an arc-shaped structure, which is adapted to the shape of the bottom inner wall of the barrel, and the lower inclined end extends into the inner side of the discharge port; There are two stirring blades, which are symmetrically arranged about the axis of the rotating shaft. The two stirring blades slide with the inner wall of the bottom of the barrel to provide rotational support for the bottom of the rotating shaft.

5. The vacuum feeder for powder particles according to claim 1, characterized in that: A plurality of scraping strips are fixedly provided on the inner wall of the frame. The scraping strips are distributed in a linear array along the axis of the frame. The maximum distance between the first and last scraping strips is greater than half the length of the filter cartridge. The bottom surface of the lowest scraping strip is lower than the bottom surface of the pleated filter cloth.

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