Powder vacuum compactor

Abstract

The utility model discloses a vacuum compactor for powder. The vacuum compactor comprises a shell, a rotary spreading and scraping assembly, a powder compacting assembly, a vacuum cavity and a rotary driving assembly, a feed port is formed in the top of the shell, and a discharge port is formed in the bottom; the vacuum cavity is formed in the middle of the shell, and a discharging channel is formed between the vacuum cavity and the shell. A filter plate is arranged at the top of the vacuum cavity; the rotary spreading and scraping assembly comprises a rotary seat, a spreading plate and a scraping plate; the rotating seat is arranged in the center of the top surface of the filter plate and can rotate under the driving of the rotating driving assembly; the bottom surface of the material spreading plate and the top surface of the filter plate have a set material spreading height, and the outer edge of the bottom surface of the material scraping plate is attached to or contacted with the filter plate; the powder compaction assembly comprises a roller frame and a compaction roller; the roller frame is detachably mounted in the rotating seat, and the height of the roller frame can be adjusted; and the compaction roller is mounted at the end part of the roller frame, can rotate freely and is positioned between the spreading plate and the scraping plate. According to the device, the material vacuumizing compaction degree is high and uniform, the large treatment capacity of 3 t / h or above can be obtained, energy input to the material is avoided, and the material is not damaged.

Description

Technical Field

[0001] This utility model relates to a powder compaction device, and more particularly to a powder vacuum compactor. Background Technology

[0002] Low bulk density powders, such as silica and carbon black, have a bulk density of no more than 0.1 kg / L. They require significant space during packaging, transportation, and subsequent molding processes, necessitating compaction during packaging. Currently, the most common compaction method is a variable-pitch screw with a jacketed vacuum structure. The variable-pitch screw is positioned at the center of the cylinder for powder compaction, while a jacketed filter is installed inside the cylinder around the screw. A vacuum pump is located on the side wall of the cylinder for internal vacuuming. However, this vacuum compaction structure has the following issues that require improvement:

[0003] 1. When the inner and outer diameters of the variable pitch screw differ significantly, it is equivalent to a thicker material layer laid on the jacketed filter screen. The material near the center of the variable pitch screw cannot be effectively vacuumed, so the vacuuming effect will be greatly reduced when the processing capacity is large.

[0004] 2. A variable pitch screw of one type can only be used to compact materials of one type of bulk density. When it is necessary to change to a material of a different bulk density or to adjust the bulk density of the same material, it is necessary to replace it with a variable pitch screw with a different screw pitch ratio or to use a vacuum compactor for one type of compaction density. This is costly, inconvenient to operate and takes up a lot of space.

[0005] 3. Variable pitch screw conveyors primarily rely on friction for material transport, and the increased pitch at the rear increases conveying resistance. To eliminate this resistance, a larger motor is typically used to drive the variable pitch screw. However, the energy input of a large motor can easily damage the material. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a powder vacuum compactor that addresses the shortcomings of the prior art. This powder vacuum compactor can achieve a high degree of vacuum compaction of materials, uniformity, and a large processing capacity of over 3t / h, without any energy input to the materials and with minimal microscopic damage to the materials.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A powder vacuum compactor includes a shell, a rotary spreading and scraping assembly, a powder compaction assembly, a vacuum chamber, and a rotary drive assembly.

[0009] The top of the shell has a feed inlet and the bottom has a discharge outlet.

[0010] The vacuum chamber is located in the middle of the shell directly below the feed inlet, and a discharge channel is formed between the vacuum chamber and the shell, which is connected to the discharge outlet.

[0011] The vacuum chamber is connected to an external vacuum pump via a vacuum tube. The top of the vacuum chamber is open, and a filter plate is installed at the opening.

[0012] The rotary spreading and scraping assembly includes a rotating base and spreading plates and scraping plates arranged alternately and in equal numbers along the circumference of the rotating base.

[0013] The rotating seat is located at the center of the top surface of the filter plate and can rotate under the drive of the rotating drive assembly.

[0014] The bottom surface of the spreading plate and the top surface of the filter plate have a set spreading height, and the outer edge of the bottom surface of the scraper plate is in contact with or attached to the filter plate.

[0015] The powder compaction assembly includes a roller frame and compaction rollers in a number equal to the number of scrapers.

[0016] The roller frame is detachably installed in the rotating base and can rotate synchronously with the rotating base;

[0017] The compaction roller is installed at the end of the roller frame, can rotate freely, and is located between the spreading plate and the scraper plate; when the rotating seat rotates, the spreading plate is located upstream of the compaction roller in the direction of rotation, and the scraper plate is located downstream of the compaction roller in the direction of rotation.

[0018] The roller frame is horizontally positioned and its height in the rotating seat is adjustable, thereby allowing the compaction height between the compaction roller and the filter plate to be adjusted.

[0019] The roller frame includes a wheel axle and a wheel axle seat located in the middle of the wheel axle. The wheel axle seat is tenon-and-mortise fitted with the rotating seat. The wheel axle seat is also threaded to the rotating seat by a height adjustment screw.

[0020] There are two compaction rollers, symmetrically and rotatably arranged at both ends of the wheel axle, and two spreading plates and two scraper plates each.

[0021] The roller frame also includes a powder guide cone surface coaxially arranged on the top of the wheel axle seat, with the bottom of the powder guide cone surface being arranged with the same diameter as the rotating seat.

[0022] The top surface of the spreading plate is flush with the top surface of the rotating seat, while the top surface of the scraper plate is lower than the top surface of the rotating seat.

[0023] The scraper has an clearance groove on the inner bottom surface near the rotating seat, and the scraper bottom surface outside the clearance groove is equal to the axial length of the compaction roller.

[0024] The compaction rollers are arranged radially along the rotating base, while the spreading plate and scraper plate are arranged tangentially along the rotating base.

[0025] The feed inlet diameter is larger than the rotary seat diameter but smaller than the inner diameter of the ring surface where the compaction roller is located. The bottom surface of the feed inlet is lower than the top surface of the compaction roller and is adjacent to the inner side of the compaction roller.

[0026] The filter plate is a multi-layered metal woven filter mesh or a single sintered filter plate.

[0027] The bottom of the rotating base has a rotating shaft that extends into the vacuum chamber. The rotation drive assembly includes a geared motor, a transmission shaft, and a bevel gear set. The geared motor is located on the outside of the housing. One end of the transmission shaft is connected to the geared motor, and the other end extends into the vacuum chamber and drives the rotating shaft to rotate through the bevel gear set.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this application, the spreading plate can push the material in outward and spread it on the upper surface of the filter plate according to the set spreading height. After spreading, the gas inside the material is quickly sucked out under the vacuum below the filter plate. At this time, the material loses its fluidized state and adheres to the surface of the filter plate. After being pressed by the compacting roller, the material is pressed into a tight sheet shape. Then the scraper cleans the sheet material from the filter plate to the discharge channel on the outer edge, and then it falls into the discharge port and enters the packaging machine.

[0030] 2. The height of the powder compaction component in this application is adjustable. When it is necessary to change the material type with different bulk densities or to adjust the bulk density of the same material with different bulk densities, simply rotate the height adjustment screw to adjust the height position of the roller frame in the rotating seat. This makes the compaction height between the compaction roller and the filter plate adjustable, enabling the material to form the thinnest compressible size. The adjustment is convenient, quick, and highly versatile.

[0031] 3. This application enables materials to be vacuum-compacted to a high degree and uniformity, achieving a large processing capacity of over 3t / h, without any energy input to the materials and with minimal microscopic damage. Attached Figure Description

[0032] Figure 1 This diagram shows the overall three-dimensional structure of a powder vacuum compactor according to the present invention.

[0033] Figure 2 This diagram shows a top-view three-dimensional structural schematic of a powder vacuum compactor according to the present invention.

[0034] Figure 3 A three-dimensional structural schematic diagram of the rotary spreading and scraping assembly in this application is shown.

[0035] Figure 4 A three-dimensional structural schematic diagram of the roller frame in this application is shown.

[0036] Figure 5 A line drawing of the rotary drive assembly in this application is shown.

[0037] Figure 6 A three-dimensional structural schematic diagram of the rotary drive component in this application is shown.

[0038] Among them are:

[0039] 10. Shell; 11. Inlet; 12. Outlet;

[0040] 20. Rotary spreading and scraping assembly; 21. Rotary seat; 211. Tenon groove; 212. Screw hole; 22. Rotating shaft; 23. Spreading plate; 24. Scraper plate; 241. Clearance groove;

[0041] 30. Powder compaction assembly; 31. Axle seat; 32. Axle; 33. Compactor roller; 34. Powder guide cone; 35. Height adjustment screw;

[0042] 40. Vacuum chamber; 41. Filter plate; 42. Vacuum tube; 43. Discharge channel;

[0043] 50. Rotary drive assembly; 51. Gear motor; 52. Drive shaft; 53. Bevel gear set; 54. Bearing. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

[0045] In the description of this utility model, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this utility model. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the protection scope of this utility model.

[0046] like Figure 1 and 2 As shown, a powder vacuum compactor includes a housing 10, a rotary spreading and scraping assembly 20, a powder compaction assembly 30, a vacuum chamber 40, and a rotary drive assembly 50.

[0047] The top of the housing is provided with a feed inlet 11, and the bottom is provided with a discharge outlet 12. In this embodiment, the feed inlet and discharge outlet are preferably arranged coaxially.

[0048] A vacuum chamber is located in the middle of the shell directly below the feed inlet, forming a discharge channel 43 that communicates with the discharge outlet. The vacuum chamber is connected to an external vacuum pump via a vacuum tube 42, preferably with a vacuum level greater than -80 kPa. The top of the vacuum chamber is open, and a filter plate 41 is installed at the opening. The filter plate can be a multi-layered woven metal mesh or a single sintered metal filter plate. The filter plate has a number of evenly distributed filter holes.

[0049] like Figure 3 As shown, the rotary spreading and scraping assembly includes a rotating base 21 and spreading plates 23 and scraping plates 24 arranged alternately and in equal numbers along the circumference of the rotating base.

[0050] The rotating seat is located at the center of the top surface of the filter plate, and its bottom has a rotating shaft 22 that extends into the vacuum chamber. The rotating shaft can rotate under the drive of the rotating drive assembly. In this embodiment, it is preferred to rotate counterclockwise, and the rotation speed is preferably 20 to 100 rpm.

[0051] In this embodiment, the top of the rotating seat is provided with a preferred rectangular tenon groove 211, and the center of the tenon groove is preferably provided with a threaded hole 212.

[0052] The top surface of the spreading plate is preferably flush with the top surface of the rotating seat, and the diameter of the feed inlet is larger than the diameter of the rotating seat but smaller than the inner diameter of the annular surface where the subsequent compaction roller is located. In this embodiment, there are preferably two spreading plates, arranged tangentially to the rotating seat. Alternatively, the number of spreading plates can be three or four, depending on the specific needs.

[0053] The bottom surface of the spreading plate and the top surface of the filter plate have a set spreading height, preferably 10 to 30 mm.

[0054] The top surface of the scraper is lower than the top surface of the rotating seat. An clearance groove 241 is provided on the inner bottom surface of the scraper near the rotating seat. The outer edge of the scraper's bottom surface, i.e., the outer edge of the scraper's bottom surface, is in contact with or adheres to the filter plate. Furthermore, the length of the outer edge of the scraper's bottom surface is equal to the axial length of the subsequent compaction roller, which can completely scrape away the compacted material and avoid damaging the uncompacted material.

[0055] In this embodiment, the number of scraper blades is equal to the number of spreading blades, preferably two, arranged tangentially to the rotating seat. Alternatively, the number of scraper blades can be three or four, depending on the specific requirements.

[0056] The powder compaction assembly includes a roller frame and compaction rollers 33 in number equal to the number of scrapers.

[0057] The roller frame is detachably installed in the rotating seat and can rotate synchronously with the rotating seat. The compaction roller is installed at the end of the roller frame, can rotate freely, and is located between the spreading plate and the scraper plate; when the rotating seat rotates, the spreading plate is located upstream of the compaction roller in the direction of rotation, and the scraper plate is located downstream of the compaction roller in the direction of rotation.

[0058] In this embodiment, the roller frame is horizontally arranged, and its structure is as follows: Figure 4 As shown, the preferred embodiment includes a wheel axle 32 and a wheel axle seat 31 disposed in the middle of the wheel axle. The wheel axle seat is preferably rectangular and is tenon-mortised with the rotating seat. The wheel axle seat is also threadedly connected to the rotating seat by a height adjustment screw 35.

[0059] When it is necessary to change to a material with a different bulk density or to adjust the bulk density of the same material, simply rotate the height adjustment screw to adjust the height of the roller frame in the rotating seat, thereby making the compaction height between the compaction roller and the filter plate adjustable.

[0060] In this embodiment, two compaction rollers are preferably arranged symmetrically and rotatably at both ends of the axle, and both compaction rollers are arranged radially. The axis of the compaction rollers is parallel to each spreading plate, which can ensure that the evenly spread material is compacted evenly.

[0061] As an alternative, the number of compaction rollers and axles can be selected based on production capacity and other requirements.

[0062] Taking the filter screen outer diameter D (m), the number of pressure rollers x, the pressure roller width W (m), the rotating seat speed n (rpm), the material spreading thickness t, and the initial bulk density of the material ρ (kg / L) as an example, the calculation is as follows:

[0063] The area S(m) swept by the pressure roller per revolution 2 The formula for calculating ) is:

[0064]

[0065] The formula for calculating the equipment capacity Q (t / h) is:

[0066] Q = S * t * ρ * 60 * n

[0067] Therefore, in this embodiment, two processes can already meet the large processing capacity of 3t / h or more.

[0068] Furthermore, the roller frame also includes a powder guide cone surface 34 coaxially disposed on the top of the axle seat, and the bottom of the powder guide cone surface is preferably arranged with the same diameter as the rotating seat. The setting of the powder guide cone surface can evenly disperse the feed into each section below, ensuring the uniformity of paving.

[0069] Furthermore, the compaction roller is located outside the bottom surface of the feed inlet, and its top surface is higher than the bottom surface of the feed inlet, which further ensures the uniformity of paving.

[0070] like Figure 5 and Figure 6As shown, the rotary drive assembly includes a geared motor 51, a drive shaft 52, and a bevel gear set 53. The geared motor is located on the outside of the housing. One end of the drive shaft is connected to the geared motor, and the other end extends into the vacuum chamber, driving the rotary shaft to rotate via the bevel gear set. Furthermore, bearings are fitted on both the drive shaft and the rotary shaft to ensure rotational reliability.

[0071] The working principle of the powder vacuum compactor in this application is as follows: After the powder material enters through the feed inlet, it is pushed outward by the spreading plate at the lower edge of its own flow-limiting cylinder and spread evenly on the upper surface of the filter plate. The material thickness is preferably 10-30mm. After being spread, the gas inside the material is quickly sucked out under the vacuum action below the filter plate. At this time, the material loses its fluidized state and adheres to the surface of the filter plate. The gap between the compaction roller and the filter plate is adjusted to the thinnest size that the material can be compressed by the height adjustment screw. After the compaction roller passes over it, the material is compressed into a compacted sheet shape. Then, the scraper cleans the sheet-like material from the filter plate to the discharge channel at the outer edge, and then it falls into the discharge port and enters the packaging machine.

[0072] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A powder vacuum compactor characterized by: The shell, the rotary spreading and scraping material assembly, the powder compacting assembly, the vacuum cavity and the rotary driving assembly are included. The top of the shell is provided with a feeding port, and the bottom is provided with a discharging port. The vacuum cavity is arranged in the middle of the shell directly below the feeding port, and a discharging channel connected with the discharging port is formed between the vacuum cavity and the shell. The rotary spreading and scraping material assembly includes a rotary seat and a plurality of spreading plates and scraping plates arranged in a staggered manner along the circumference of the rotary seat. The rotary seat is arranged at the center of the top surface of the filter plate and can rotate under the driving of the rotary driving assembly. The bottom surface of the spreading plate has a set spreading height with the top surface of the filter plate, and the outer edge of the bottom surface of the scraping plate is attached to or in contact with the filter plate. The powder compacting assembly includes a roller holder and a plurality of compacting rollers equal in number to the scraping plates. The roller holder is detachably mounted in the rotary seat and can rotate synchronously with the rotary seat. The compacting rollers are mounted at the end of the roller holder, can rotate freely, and are located between the spreading plates and the scraping plates.

2. The powder vacuum compactor of claim 1, wherein: When the rotary seat rotates, the spreading plates are located upstream of the compacting rollers in the rotation direction, and the scraping plates are located downstream of the compacting rollers in the rotation direction.

3. The powder vacuum compactor of claim 2, wherein: The roller holder is horizontally arranged and the height position in the rotary seat is adjustable, thereby adjusting the compacting height between the compacting rollers and the filter plate.

4. The powder vacuum compactor of claim 3, wherein: The roller holder includes an axle and an axle seat arranged at the middle of the axle, the axle seat is matched with the rotary seat in mortise and tenon joint, and the axle seat is also connected with the rotary seat in screw thread through a height adjusting screw.

5. The powder vacuum compactor of claim 1, wherein: The roller holder further includes a powder guide cone surface coaxially arranged at the top of the axle seat, and the bottom of the powder guide cone surface is arranged in equal diameter with the rotary seat.

6. The powder vacuum compactor of claim 1, wherein: The top surface of the spreading plate is flush with the top surface of the rotary seat, and the top surface of the scraping plate is lower than the top surface of the rotary seat.

7. The powder vacuum compactor of claim 1, wherein: The inner bottom surface of the scraping plate close to the rotary seat is provided with an avoiding groove, and the bottom surface of the scraping plate outside the avoiding groove is equal in axial length to the compacting roller.

8. The powder vacuum compactor of claim 1, wherein: The compacting rollers are arranged along the radial direction of the rotary seat, and the spreading plates and the scraping plates are arranged along the tangential direction of the rotary seat.

9. The powder vacuum compactor of claim 1, wherein: The diameter of the feeding port is greater than the diameter of the rotary seat but smaller than the inner diameter of the ring surface where the compacting rollers are arranged, the bottom surface of the feeding port is lower than the height of the top surface of the compacting rollers, and is adjacent to the inner side of the compacting rollers.

10. The powder vacuum compactor of claim 1, wherein: The filter plate is a multi-layer metal woven filter screen or a whole block sintered filter plate. The bottom of the rotary seat has a rotary shaft extending into the vacuum cavity, the rotary driving assembly includes a speed reducer, a transmission shaft and a bevel gear set, the speed reducer is arranged outside the shell, one end of the transmission shaft is connected with the speed reducer, the other end extends into the vacuum cavity and drives the rotary shaft to rotate through the bevel gear set.

Images