Pneumatic vacuum feeding machine

Abstract

The utility model discloses a pneumatic vacuum feeding machine, and relates to the field of feeding machines. The pneumatic vacuum feeding machine further comprises a mounting plate arranged in a top cover in the feeding machine body, and a plurality of penetrating openings are formed in the mounting plate circumferentially at equal intervals. The filter cartridge is rotationally connected to the position, close to the penetrating opening, of the lower end of the mounting plate, and filter holes are formed in the side wall and the bottom of the filter cartridge; the fan blade group is arranged in the filter cartridge, and the filter cartridge is rotationally connected with the mounting plate, so that when airflow passes through the filter cartridge, the filter cartridge can be driven by the fan blade group to rotate to generate centrifugal force, and then part of powder attached to the cartridge wall of the filter cartridge can be thrown away under the action of the centrifugal force; therefore, the smoothness that airflow penetrates through the filter cartridge to be discharged is guaranteed, the phenomenon that negative pressure suction of materials is affected due to the fact that filter holes of the filter cartridge are blocked is avoided, and the stability of vacuum feeding of the materials is effectively guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of loading machines, and specifically relates to a pneumatic vacuum loading machine. Background Art

[0002] In the continuous conveying production processes such as chemical industry, medicine, and grain processing, the conveying of bulk materials has always been the most concerned link for enterprises. The traditional conveying method is manual conveying, that is, using turnover barrels for transfer and then manual feeding. This conveying method is carried out under open conditions, and a large amount of dust will float into the air during the conveying and feeding processes, inevitably causing environmental pollution and serious harm to the health of operators. Therefore, a pneumatic vacuum loading machine has been designed on the market to achieve automatic and closed feeding of materials, avoiding the problem of a large amount of dust floating into the air during the conveying and feeding processes.

[0003] The high vacuum generated by the vacuum generator in the pneumatic vacuum loading machine can prevent the conveyed materials from stratifying and ensure the uniformity of the components of the mixed materials. It is the main equipment for automatic feeding of machines such as tablet presses, capsule filling machines, dry granulation machines, packaging machines, crushers, and vibrating screens. Its specific working principle is as follows: When compressed air is supplied to the vacuum generator, the vacuum generator generates negative pressure to form a vacuum air flow, and the materials are sucked into the suction nozzle to form a material air flow, which reaches the silo of the loading machine through the suction pipe. The filter completely separates the materials from the air. When the silo is filled with materials, the controller will automatically cut off the air source, and the vacuum generator stops working. At the same time, the silo door automatically opens, and the materials fall into the hopper of the equipment. Meanwhile, the compressed air automatically cleans the filter through the pulse backflush valve. When the time is up or the level sensor sends a feeding signal, the loading machine is automatically started.

[0004] However, when the existing pneumatic vacuum loading machine is actually used, when pneumatic vacuum suction feeding is carried out, some materials will adhere to the surface of the filter under the action of negative pressure suction, causing blockage of the filter, which may lead to insufficient suction force for the materials and affect the feeding efficiency of the materials. Especially for powdery materials, in view of this, the present utility model is specifically proposed. Content of the Utility Model

[0005] The technical problem to be solved by the present utility model is to overcome the deficiencies of the prior art and provide a pneumatic vacuum loading machine that can overcome or at least partially solve the above problems.

[0006] To solve the above technical problems, the basic concept of the technical solution adopted by the present utility model is: a pneumatic vacuum feeding machine, including a feeding machine body, further including: a mounting plate disposed in the top cover of the feeding machine body, and a plurality of through holes are equidistantly arranged in a circumferential manner on the mounting plate; a filter cylinder rotatably connected to a position near the through hole at the lower end of the mounting plate, and filter holes are formed in the side wall and bottom of the filter cylinder; a bracket fixedly connected to a position near the through hole at the upper end inside the filter cylinder; and a fan blade group fixedly connected to the bracket.

[0007] In order to facilitate scraping the powder adhered to the surface of the filter cylinder and improve the smoothness of the airflow passing through the filter holes of the filter cylinder, further, a plurality of scraping plates are fixedly connected to the inner wall of the vacuum hopper in the feeding machine body at equal intervals in a circumferential manner, the scraping plates are disposed at a position close to the filter cylinder, and one side of the scraping plate close to the filter cylinder is slidably attached to the outer wall of the filter cylinder.

[0008] In order to facilitate knocking the filter cylinder and further improve the removal effect of the powder adhered to the surface of the filter cylinder, still further, a plurality of arc-shaped raised strips are arranged on the outer wall of the filter cylinder at equal intervals in a circumferential manner, the arc-shaped raised strips are integrally formed with the filter cylinder, and the scraping plate is an elastic plate.

[0009] In order to facilitate the filter cylinder to reciprocate up and down in the vacuum hopper and further improve the removal effect of the powder adhered to the surface of the filter cylinder, still further, the mounting plate is slidably connected in the top cover, a plurality of telescopic springs are fixedly connected to the upper end of the mounting plate at equal intervals in a circumferential manner, the upper ends of the telescopic springs are fixedly connected to the top cover, and a moving component for controlling the up and down movement of the mounting plate is disposed below the mounting plate.

[0010] Still further, the moving component includes a strip-shaped airbag and a cylindrical airbag, the strip-shaped airbag is fixedly connected to a position on the inner wall of the vacuum hopper close to the scraping plate, the cylindrical airbag is fixedly connected to the inner wall of the vacuum hopper above the cylindrical airbag through a support plate, the upper end of the cylindrical airbag is in contact with the lower surface of the mounting plate, and the adjacent strip-shaped airbag and cylindrical airbag are connected through a trachea.

[0011] In order to facilitate the mounting plate to play a role of limiting and guiding, so that it can only shake up and down, still further, a plurality of notches are equidistantly arranged in a circumferential manner on the outer side of the mounting plate, and a plurality of limiting strips are fixedly connected to the inner wall of the top cover, and the plurality of limiting strips are respectively slidably connected to the adjacent notches.

[0012] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art: By arranging a fan blade group inside the filter cylinder and rotatably connecting the filter cylinder with the mounting plate, when the air flow passes through the filter cylinder, the filter cylinder will rotate under the drive of the fan blade group to generate centrifugal force, and then part of the powder adhered to the wall of the filter cylinder will be thrown off under the action of the centrifugal force, so as to ensure the smoothness of the air flow passing through the filter cylinder and discharged, avoid the blockage of the filter holes of the filter cylinder, and affect the negative pressure suction of the material, effectively ensuring the stability of the vacuum feeding of the material. And because the filter cylinder has a centrifugal force on the material, the adhesion of part of the powder adhered to the wall of the filter cylinder will also decrease under the action of the centrifugal force. Therefore, when the filter cylinder is cleaned by the reverse blowing bubbles, the adhered powder can be more fully detached from the filter cylinder, further improving the cleaning effect of the filter cylinder.

[0013] The following further describes in detail the specific implementation manners of the present utility model with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In the drawings:

[0015] Figure 1 is a schematic structural view of the present utility model;

[0016] Figure 2 is a schematic structural view of the interior of the vacuum hopper and the top cover of the present utility model;

[0017] Figure 3 is a schematic structural view of the interior of the filter cylinder of the present utility model.

[0018] In the figure: 1. Feeding machine body; 101. Vacuum hopper; 102. Top cover; 103. Vacuum generator; 104. Reverse blowing bubbles; 2. Mounting plate; 201. Filter cylinder; 202. Arc-shaped raised strip; 203. Bracket; 204. Fan blade group; 205. Notch; 206. Limiting strip; 207. Scraper; 208. Strip-shaped airbag; 209. Cylindrical airbag; 2010. Telescopic spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0020] Embodiment 1:

[0021] Refer to Figures 1 - 3, The pneumatic vacuum feeding machine further includes: a mounting plate 2, which is arranged in the top cover 102 of the feeding machine body 1. A plurality of through holes are circumferentially and equidistantly formed in the mounting plate 2; a filter cylinder 201, which is rotatably connected to a position near the through hole at the lower end of the mounting plate 2. Filter holes are formed in the side wall and bottom of the filter cylinder 201; a bracket 203, which is fixedly connected to a position near the through hole at the upper end inside the filter cylinder 201; a fan blade group 204, which is fixedly connected to the bracket 203.

[0022] During the operation of the pneumatic vacuum feeding machine, when it is necessary to suck materials into the vacuum hopper 101 under the action of vacuum suction, first connect the material pipe on the material bin with the suction pipe on the vacuum hopper 101, and control the discharge door to close through the rotary cylinder. Then, the vacuum generator 103 can be started. When compressed air is supplied to the vacuum generator 103,

[0023] the vacuum generator 103 generates negative pressure to form a vacuum air flow. Then, the materials in the material bin will be sucked into the suction nozzle under the action of the negative pressure air flow to form a material air flow, and reach the vacuum hopper 101 through the suction pipe. The air entering the vacuum hopper 101 will pass through the filter cylinder 201 and be discharged, while the materials will stay in the vacuum hopper 101 under the interception of the filter cylinder 201, so that the materials and air can be completely separated. When a certain amount of materials are stored in the vacuum hopper 101, the controller will automatically cut off the air source, and the vacuum generator 103 will stop working. At the same time, the controller controls the discharge door to open through the rotary cylinder, and the materials will fall into the hopper of the equipment. At the same time, the backflush bubble 104 blows compressed air to the filter cylinder 201 through the pulse backflush valve to perform backflush cleaning on it. When the time is up or the level sensor sends a feeding signal, feeding will be automatically carried out again.

[0024] When the air flow separated from the materials flows into the filter cylinder 201, the fan blades on the fan blade group 204 will rotate under the action of the rapidly flowing air flow. Then, the fan blade group 204 will drive the filter cylinder 201 to rotate rapidly through the bracket 203 to form a centrifugal force. Then, some of the powder attached to the wall of the filter cylinder 201 will be thrown off under the action of the centrifugal force, thus ensuring the smoothness of the air flow passing through the filter cylinder 201 and avoiding affecting the negative pressure suction of the materials due to the blockage of the filter holes of the filter cylinder 201, effectively ensuring the stability of vacuum feeding of the materials. And because the filter cylinder 201 has a centrifugal force on the materials, the adhesion of some of the powder attached to the wall of the filter cylinder 201 will also decrease under the action of the centrifugal force. Therefore, when the backflush bubble 104 performs backflush cleaning on the filter cylinder 201, the attached powder can be more fully detached from the filter cylinder 201, further improving the cleaning effect of the filter cylinder 201.

[0025] Embodiment 2:

[0026] Reference Figures 1 - 3 The pneumatic vacuum feeder is basically the same as that in Embodiment 1. Further, a plurality of scraping plates 207 are fixedly connected to the inner wall of the vacuum hopper 101 in the feeder body 1 at equal circumferential intervals. The scraping plates 207 are arranged near the filter cylinder 201. The side of the scraping plate 207 close to the filter cylinder 201 is in sliding contact with the outer wall of the filter cylinder 201. Since the scraping plate 207 is in sliding contact with the outer wall of the filter cylinder 201, when the filter cylinder 201 rotates, the scraping plate 207 will scrape off the powder attached to the surface of the filter cylinder 201, thereby improving the smoothness of the airflow passing through the filter holes of the filter cylinder 201 and ensuring the stability of the material suction.

[0027] As Figure 2 shown, a plurality of arc-shaped raised strips 202 are arranged on the outer wall of the filter cylinder 201 at equal circumferential intervals. The arc-shaped raised strips 202 are integrally formed with the filter cylinder 201. The scraping plate 207 is an elastic plate. During the rotation of the filter cylinder 201, when the arc-shaped raised strip 202 contacts the scraping plate 207, the elastic scraping plate 207 will be bent and deformed under the action of the arc-shaped raised strip 202. When the arc-shaped raised strip 202 is separated from the scraping plate 207, at this time, the scraping plate 207 will reset under the action of its own elasticity, so as to contact the surface of the filter cylinder 201 again, playing a knocking effect on the filter cylinder 201 and further improving the removal effect of the powder attached to the surface of the filter cylinder 201.

[0028] Embodiment 3:

[0029] Reference Figures 1 - 3 The pneumatic vacuum feeder is basically the same as that in Embodiment 2. Further, the mounting plate 2 is slidably connected in the top cover 102. A plurality of telescopic springs 2010 are fixedly connected to the upper end of the mounting plate 2 at equal circumferential intervals. The upper ends of the telescopic springs 2010 are fixedly connected to the top cover 102. A moving component for controlling the up and down movement of the mounting plate 2 is arranged below the mounting plate 2.

[0030] The moving component includes a strip-shaped airbag 208 and a cylindrical airbag 209. The strip-shaped airbag 208 is fixedly connected to the inner wall of the vacuum hopper 101 near the scraping plate 207. The cylindrical airbag 209 is fixedly connected to the inner wall of the vacuum hopper 101 above the cylindrical airbag 209 through a support plate. The upper end of the cylindrical airbag 209 is in contact with the lower surface of the mounting plate 2. The adjacent strip-shaped airbag 208 and cylindrical airbag 209 are connected by a trachea.

[0031] When the filter cartridge 201 rotates, the elastic scraper 207 will bend and deform under the action of the arc-shaped convex strip 202. Then, the scraper 207 will squeeze the strip-shaped airbag 208. Then, the gas in the strip-shaped airbag 208 will enter the cylindrical airbag 209 through the trachea. Then, the cylindrical airbag 209 will expand and bulge to drive the filter cartridge 201 to move upward through the mounting plate 2. When the arc-shaped convex strip 202 is separated from the scraper 207, the elastic scraper 207 will reset, thus relieving the extrusion of the strip-shaped airbag 208. Then, the excess gas in the cylindrical airbag 209 will flow back into the strip-shaped airbag 208. Then, the mounting plate 2 will drive the filter cartridge 201 to move downward under the elastic force of the telescopic spring 2010. Repeating this process can make the filter cartridge 201 reciprocate up and down in the vacuum hopper 101, further improving the removal effect of the powder adhering to the surface of the filter cartridge 201 and enhancing the gas permeability.

[0032] Embodiment 4:

[0033] Referring to Figure 2 , the pneumatic vacuum feeding machine is basically the same as that in Embodiment 3. Further, a plurality of notches 205 are equidistantly arranged in a circumferential manner on the outer side of the mounting plate 2, and a plurality of limiting strips 206 are fixedly connected to the inner wall of the top cover 102. The plurality of limiting strips 206 are respectively slidably connected to the adjacent notches 205.

[0034] By the cooperative use of the notches 205 and the limiting strips 206, the mounting plate 2 can be limited and guided, enabling it to only reciprocate up and down and preventing the mounting plate 2 from rotating, thus avoiding damage to the telescopic spring 2010.

[0035] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention.

Claims

1. Pneumatic vacuum feeding machine, including the feeding machine body (1), characterized in that, It further includes: An installation plate (2), which is arranged in the top cover (102) of the loader body (1). A plurality of through holes are provided on the installation plate (2) at equal circumferential intervals; A filter cylinder (201), which is rotatably connected to a position close to the through hole at the lower end of the installation plate (2). Filter holes are provided on the side wall and the bottom of the filter cylinder (201); A bracket (203), which is fixedly connected to a position close to the through hole at the upper end inside the filter cylinder (201); A fan blade group (204), which is fixedly connected to the bracket (203).

2. The pneumatic vacuum feeding machine according to claim 1, wherein, A plurality of scraping plates (207) are fixedly connected to the inner wall of the vacuum hopper (101) in the loader body (1) at equal circumferential intervals. The scraping plates (207) are arranged at a position close to the filter cylinder (201). One side of the scraping plate (207) close to the filter cylinder (201) is in sliding contact with the outer wall of the filter cylinder (201).

3. The pneumatic vacuum feeding machine according to claim 2, characterized in that, A plurality of arc-shaped raised strips (202) are arranged on the outer wall of the filter cylinder (201) at equal circumferential intervals. The arc-shaped raised strips (202) are integrally formed with the filter cylinder (201). The scraping plate (207) is an elastic plate.

4. The pneumatic vacuum feeding machine according to claim 3, wherein, The installation plate (2) is slidably connected in the top cover (102). A plurality of telescopic springs (2010) are fixedly connected to the upper end of the installation plate (2) at equal circumferential intervals. The upper ends of the telescopic springs (2010) are fixedly connected to the top cover (102). A moving component for controlling the up and down movement of the installation plate (2) is arranged below the installation plate (2).

5. The pneumatic vacuum feeding machine according to claim 4, wherein, The moving component includes a strip-shaped airbag (208) and a cylindrical airbag (209). The strip-shaped airbag (208) is fixedly connected to a position on the inner wall of the vacuum hopper (101) close to the scraping plate (207). The cylindrical airbag (209) is fixedly connected to the inner wall of the vacuum hopper (101) close to the upper part of the cylindrical airbag (209) through a support plate. The upper end of the cylindrical airbag (209) is in contact with the lower surface of the installation plate (2). Adjacent strip-shaped airbags (208) and cylindrical airbags (209) are connected through an air pipe.

6. The pneumatic vacuum feeding machine according to claim 4, wherein A plurality of notches (205) are provided on the outer side of the installation plate (2) at equal circumferential intervals. A plurality of limiting strips (206) are fixedly connected to the inner wall of the top cover (102). The plurality of limiting strips (206) are respectively slidably connected to adjacent notches (205).

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