A multi-stage powder screening device for producing skin-friendly powder
By designing a multi-stage powder screening device, combined with the buffer protection of damping springs and buffer springs, the problems of incomplete screening and easy wear of traditional powder screening devices are solved, achieving efficient powder classification and equipment protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI DAWEI BIOTECHNOLOGY CO LTD
- Filing Date
- 2025-08-12
- Publication Date
- 2026-07-14
AI Technical Summary
Traditional powder screening devices do not screen thoroughly, making it difficult to classify powders of different particle sizes. Furthermore, the screening structure is prone to wear, affecting accuracy and equipment lifespan.
A multi-stage powder screening device was designed, which includes primary, secondary and tertiary screening structures. Combined with the buffer design of damping springs and buffer springs, the screening box is moved by the motor-driven rotating shaft to achieve multi-stage screening and buffer protection.
It achieves efficient classification and screening of powders of different particle sizes, reduces equipment wear, extends service life, and lowers maintenance costs.
Smart Images
Figure CN224486771U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of powder screening devices, specifically a multi-stage powder screening device for the production of skin-friendly powders. Background Technology
[0002] Skin-friendly powder is a type of powder material with good skin compatibility, which can come into gentle contact with human skin and is unlikely to cause irritation or allergic reactions. It is widely used in cosmetics, skin care products, baby products, medical dressings and other fields. Its composition is diverse, including purified natural mineral powders, plant-based powders, and surface-modified artificial functional powders. In the production process of skin-friendly powder, sieving before use is an indispensable key step. However, traditional sieving devices have two problems. First, the single sieving structure cannot thoroughly sieve the powder, making it difficult to classify powders of different particle sizes. As a result, the finished product still contains a mixture of particles of various sizes, which cannot meet the strict requirements of high-end skin-friendly products for powder fineness and uniformity. Second, the sieving structure lacks an effective buffer design, which can easily cause sieve plate wear when powder impacts and equipment vibrations. This not only affects the sieving accuracy, but also shortens the service life of the equipment and increases production and maintenance costs. Therefore, those skilled in the art provide a multi-stage sieving device for the production of skin-friendly powder to solve the problems mentioned in the background art. Utility Model Content
[0003] The purpose of this invention is to provide a multi-stage sieving device for the production of skin-friendly powders, so as to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] A multi-stage sieving device for producing skin-friendly powder includes a sieving box, a primary sieving structure, a secondary sieving structure, a tertiary sieving structure, and a holding structure. The upper part of the inner walls on both sides of the sieving box is provided with sliding grooves, within which the primary sieving structure is slidably connected. Two first sliding frames are longitudinally fixedly connected to the middle of the inner walls on both sides of the sieving box, with the secondary sieving structure slidably connected to the first sliding frames. The tertiary sieving structure is slidably connected to the lower part of the secondary sieving structure and to the first sliding frames. Two second sliding frames are fixedly connected to the bottom wall of the sieving box, with the holding structure slidably connected to the second sliding frames.
[0006] As a further embodiment of this utility model: the primary screening structure includes a first screening box, a first screening plate, a slide, a damping spring, a connecting plate, a connecting groove, and a protective frame. The first screening plate is fixedly connected to the bottom of the first screening box, the connecting plates are fixedly connected to both sides of the bottom of the first screening box, the protective frame is fixedly connected to both sides of the bottom of the connecting plate, and the damping spring is fixedly connected to the inside of the protective frame and the bottom of the connecting plate.
[0007] As a further embodiment of this utility model: a slide frame corresponding to the slide groove is fixedly connected to the other side of the damping spring, the slide frame is slidably connected to the slide groove, and the slide frame is connected to the powder screening box by screw thread. Connecting grooves corresponding to the protective frame are opened on both sides of the top of the slide frame, and the connecting grooves are slidably connected to the protective frame. A first cabinet door is hinged to one edge of the first screening box.
[0008] As a further embodiment of this utility model: the secondary screening structure includes a second screening box, a second screening plate, a first sliding groove, a fixed plate and a fixed rod. The second screening box is fixedly connected to the bottom of the second screening box, and the fixed plates are fixedly connected to the lower parts of both sides of the second screening box. Two first sliding grooves corresponding to the first sliding frame are opened on both sides of the fixed plate. The first sliding grooves are slidably connected to the first sliding frame. The fixed rod is fixedly connected to the middle of the bottom of the fixed plate. A second cabinet door is hinged to one edge of the second screening box.
[0009] As a further embodiment of this utility model: the three-stage screening structure includes a third screening box, a second sliding groove, a third screening plate, a connecting block, and a buffer spring. The bottom of the third screening box is fixedly connected to the third screening plate. Two second sliding grooves corresponding to the first sliding frame are opened on both sides of the third screening box. The second sliding grooves are slidably connected to the first sliding frame. A connecting block is fixedly connected to one edge of the bottom of the third screening box. Buffer springs are fixedly connected to both sides of the bottom of the connecting block. The fixed rod on the secondary screening structure is fixedly connected to the third screening box on the side away from the fixed plate. A third cabinet door is hinged to one edge of the third screening box.
[0010] As a further embodiment of this utility model: the holding structure includes a holding box, a sealing door, a handle and a third sliding groove. The sealing door is hinged to one edge of the holding box, and a handle is fixedly connected to the lower part of one side of the holding box. The bottom of the holding box has a third sliding groove on both sides, which is corresponding to the second sliding frame. The third sliding groove is slidably connected to the second sliding frame, and the bottom wall of the holding box is inclined.
[0011] As a further improvement of this utility model: a protective door is hinged to one edge of the powder screening box, an inlet is fixedly connected to the top of the powder screening box, a base is fixedly connected to the bottom of the powder screening box, anti-slip pads are fixedly connected to the four corners of the bottom of the base, and a connecting frame is fixedly connected to the lower part of the inner wall of one side of the powder screening box.
[0012] As a further embodiment of this utility model: a motor is fixedly connected to the lower part of one side of the powder screening box, and a round shaft is fixedly connected to the power output shaft of the motor. The round shaft passes through one side of the powder screening box and extends into its interior on the side away from the motor. A rotating shaft is fixedly connected to the round shaft and the powder screening box. A fixing ring is fixedly connected to the rotating shaft, and a protrusion is fixedly connected to the fixing ring.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1. In use, firstly, pour the skin-friendly powder to be screened into the inlet at the top of the sieving box. The powder falls into the first screening box along the inlet. When the powder falls onto the first sieve plate, the first sieve plate and the first screening box will press down under the action of gravity, which will cause the damping spring to be compressed and contract. At the same time, the protective frame slides synchronously in the connecting groove. Through the elastic buffering effect of the damping spring, the vibration of the first sieve plate and the first screening box is reduced, thereby protecting the primary screening structure. At this time, the powder undergoes preliminary screening through the first sieve plate and then falls onto the second sieve plate.
[0015] 2. Next, the motor is started. The motor's power output shaft drives the round shaft to rotate, which in turn drives the rotating shaft to rotate. As the rotating shaft rotates, the protrusions on its surface fixing ring also rotate. When the protrusions rotate to contact the third screening box of the three-stage screening structure, they will lift the third screening box. Since the third screening box of the three-stage screening structure is fixedly connected to the second screening box of the two-stage screening structure through a fixing rod, the lifting of the third screening box will drive the second screening box to rise together. When the protrusions rotate away from the third screening box, under the action of gravity and related structures, the second and third screening boxes will fall back. This cycle is repeated, causing the second and third screening boxes to form an orderly turbulence. The second screening box slides up and down along the first sliding frame through the first sliding groove, while the third screening box slides synchronously on the first sliding frame through the second sliding groove. The buffer spring at the bottom of the connecting block will fall onto the connecting frame, playing a buffering role in this process and reducing the impact of the turbulence.
[0016] 3. The powder falling into the first screening box undergoes preliminary screening by the first sieve plate at the bottom of the first screening box. Larger particles are retained in the first screening box. After screening, the first cabinet door can be opened for cleaning and collection. Powder that meets the preliminary screening requirements falls through the first sieve plate onto the second sieve plate. As the second screening box continues to agitate, the powder is further screened on the second sieve plate. Medium-sized particles are retained and can be collected by opening the second cabinet door. Finer powder falls through the second sieve plate onto the third sieve plate. Under the agitation of the third screening box, the powder undergoes fine screening through the third sieve plate. The retained powder can be collected by opening the third cabinet door. Finally, the finest powder that meets the requirements falls through the third sieve plate into the holding box below.
[0017] 4. The container is slidably connected to the second sliding frame on the bottom wall of the sieving box via the third sliding groove. Its bottom wall is inclined to facilitate the powder to gather inside. After sieving, the container can be pulled out along the second sliding frame by holding the handle, and the sieved powder can be taken out by opening the hinged sealing door on one side. Attached Figure Description
[0018] Figure 1This is a schematic diagram of a multi-stage sieving device for producing skin-friendly powder.
[0019] Figure 2 This is a schematic diagram of the internal connection structure of the sieving box in a multi-stage sieving device for producing skin-friendly powder.
[0020] Figure 3 This is a schematic diagram of the internal structure of the sieving box in a multi-stage sieving device for producing skin-friendly powder.
[0021] Figure 4 This is a schematic diagram of the first-stage screening structure in a multi-stage screening device for producing skin-friendly powder.
[0022] Figure 5 This is a schematic diagram of the two-stage sieving structure in a multi-stage sieving device for producing skin-friendly powder.
[0023] Figure 6 This is a schematic diagram of a three-stage sieving structure in a multi-stage sieving device for producing skin-friendly powder.
[0024] Figure 7 This is a schematic diagram of the structure in a multi-stage sieving device for producing skin-friendly powder.
[0025] In the diagram: 1. Sieving box; 2. Protective door; 3. Base; 4. Anti-slip pad; 5. Primary sieving structure; 51. First sieving box; 52. First sieve plate; 53. Slide frame; 54. Damping spring; 55. Connecting plate; 56. Connecting groove; 57. Protective frame; 6. Secondary sieving structure; 61. Second sieving box; 62. Second sieve plate; 63. First sliding groove; 64. Fixing plate; 65. Fixing rod; 7. Tertiary sieving structure; 71. Third sieving box; 72. Second sliding groove; 73. Third sieve plate; 74. Connecting block; 75. Buffer spring; 8. Container structure; 81. Container box; 82. Sealing door; 83. Handle; 84. Third sliding groove; 9. Motor; 10. Inlet; 11. Slide groove; 12. First sliding frame; 13. Connecting frame; 14. Second sliding frame; 15. Protrusion; 16. Rotating shaft; 17. Fixing ring. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] Example 1
[0028] Reference Figure 1 , Figure 2, Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 This embodiment provides a multi-stage sieving device for producing skin-friendly powder, including a sieving box 1, a primary sieving structure 5, a secondary sieving structure 6, a tertiary sieving structure 7, and a holding structure 8. The upper part of the inner walls on both sides of the sieving box 1 is provided with sliding grooves 11, within which the primary sieving structure 5 is slidably connected. Two first sliding frames 12 are longitudinally fixedly connected to the middle of the inner walls on both sides of the sieving box 1. The secondary sieving structure 6 is slidably connected to the first sliding frames 12. The tertiary sieving structure 7 is slidably connected to the lower part of the secondary sieving structure 6 and to the first sliding frames 12. Two second sliding frames 14 are fixedly connected to the bottom wall of the sieving box 1, and the holding structure 8 is slidably connected to the second sliding frames 14. A protective door 2 is hinged to one edge of the sieving box 1. An inlet 10 is fixedly connected to the top of the sieving box 1. A base 3 is fixedly connected, and anti-slip pads 4 are fixedly connected to the four corners of the bottom of the base 3. A connecting frame 13 is fixedly connected to the lower part of the inner wall of one side of the powder screening box 1. A motor 9 is fixedly connected to the lower part of one side of the powder screening box 1. A round shaft is fixedly connected to the power output shaft of the motor 9. The round shaft passes through one side of the powder screening box 1 and extends into its interior on the side away from the motor 9. A rotating shaft 16 is fixedly connected to the round shaft and the powder screening box 1. A fixing ring 17 is fixedly connected to the rotating shaft 16. A protrusion 15 is fixedly connected to the fixing ring 17. When the motor 9 is started, the power output shaft of the motor 9 drives the round shaft to rotate, which in turn drives the rotating shaft 16 to rotate. As the rotating shaft 16 rotates, the protrusion 15 on its surface fixing ring 17 also rotates, which in turn drives the three-stage screening structure 7 and the two-stage screening structure 6 to vibrate.
[0029] Example 2
[0030] Reference Figures 4-5This embodiment is based on the previous embodiment, but differs in that the primary screening structure 5 includes a first screening box 51, a first screening plate 52, a slide 53, a damping spring 54, a connecting plate 55, a connecting groove 56, and a protective frame 57. The first screening box 51 is fixedly connected to the bottom of the first screening plate 52, and the connecting plates 55 are fixedly connected to both sides of the bottom of the first screening box 51. The protective frame 57 is fixedly connected to both sides of the bottom of the connecting plates 55. The damping spring 54 is fixedly connected inside the protective frame 57 and to the bottom of the connecting plates 55. A corresponding device is fixedly connected to the other side of the damping spring 54, which corresponds to the slide groove 11. The slide 53 is slidably connected to the slide groove 11, and the slide 53 is connected to the powder screening box 1 by screw threads. The top two sides of the slide 53 are provided with connecting grooves 56 corresponding to the protective frame 57. The connecting grooves 56 are slidably connected to the protective frame 57. The first screening box 51 is hinged to a first cabinet door on one side edge. The skin-friendly powder to be screened is poured into the inlet 10 at the top of the powder screening box 1. The powder falls into the first screening box 51 along the inlet 10. When the powder is poured onto the first sieve plate 52, the first sieve plate 52 and the first screening box 51 will press down under the action of gravity, thereby driving the damping spring 54. Under pressure, the protective frame 57 slides synchronously within the connecting groove 56. Through the elastic buffering effect of the damping spring 54, the vibration of the first sieve plate 52 and the first sieve box 51 is reduced, thus protecting the primary sieve structure 5. At this time, the powder undergoes preliminary sieving through the first sieve plate 52 and then falls onto the second sieve plate 62. After sieving, the first cabinet door can be opened for cleaning and collection. The secondary sieve structure 6 includes a second sieve box 61, a second sieve plate 62, a first sliding groove 63, a fixed plate 64, and a fixed rod 65. The second sieve plate 62 is fixedly connected to the bottom of the second sieve box 61. Fixed plates 64 are fixedly connected to the lower parts of both sides of the box 61. Two first sliding grooves 63 are opened on both sides of the fixed plates 64, which are corresponding to the first sliding frame 12. The first sliding grooves 63 are slidably connected to the first sliding frame 12. A fixed rod 65 is fixedly connected to the bottom center of the fixed plate 64. A second cabinet door is hinged to one edge of the second screening box 61. Powder that meets the preliminary screening requirements falls onto the second screening plate 62 through the first screening plate 52. As the second screening box 61 continues to shake, the powder is further screened on the second screening plate 62. Powder with medium particle size is intercepted and can be collected by opening the second cabinet door.
[0031] Example 3
[0032] Reference Figures 6-7This embodiment is based on the previous embodiment, but differs in that the three-stage screening structure 7 includes a third screening box 71, a second sliding groove 72, a third screen plate 73, a connecting block 74, and a buffer spring 75. The bottom of the third screening box 71 is fixedly connected to the third screen plate 73. Two second sliding grooves 72, corresponding to the first sliding frame 12, are opened on both sides of the third screening box 71. The second sliding grooves 72 are slidably connected to the first sliding frame 12. A connecting block 74 is fixedly connected to one edge of the bottom of the third screening box 71. Buffer springs 75 are fixedly connected to both sides of the bottom of the connecting block 74. The side of the fixing rod 65 on the secondary screening structure 6 away from the fixing plate 64 is connected to the third screening box. Box 71 is fixedly connected, and a third cabinet door is hinged to one edge of the third screening box 71. When the protrusion 15 rotates to contact the third screening box 71 of the three-stage screening structure 7, it will lift the third screening box 71. Since the third screening box 71 of the three-stage screening structure 7 is fixedly connected to the second screening box 61 of the two-stage screening structure 6 through the fixing rod 65, the lifting of the third screening box 71 will drive the second screening box 61 to rise together. When the protrusion 15 rotates away from the third screening box 71, under the action of gravity and related structures, the second screening box 61 and the third screening box 71 will fall back down. This cycle repeats, causing the second screening box 61 and the third screening box 71 to form an orderly tumbling motion. The second screening box 61 slides up and down along the first sliding frame 12 via the first sliding groove 63, while the third screening box 71 slides synchronously on the first sliding frame 12 via the second sliding groove 72. The buffer spring 75 at the bottom of the connecting block 74 falls onto the connecting frame 13, which acts as a buffer to reduce the impact caused by the shaking. At this time, the finer powder falls onto the third screening plate 73 through the second screening plate 62. Under the shaking action of the third screening box 71, the powder is finely screened through the third screening plate 73. The retained powder can be collected by opening the third cabinet door. Finally, the finest powder that meets the requirements falls into the holding box 81 below through the third screening plate 73. The holding structure 8 includes the holding box 81 and a sealing door. 82. Handle 83 and third sliding groove 84. A sealing door 82 is hinged to one edge of the holding box 81. A handle 83 is fixedly connected to the lower part of one side of the holding box 81. The bottom sides of the holding box 81 are provided with third sliding grooves 84 corresponding to the second sliding frame 14. The third sliding groove 84 is slidably connected to the second sliding frame 14. The bottom wall of the holding box 81 is inclined. The holding box 81 is slidably connected to the second sliding frame 14 on the bottom wall of the powder screening box 1 through the third sliding groove 84. Its bottom wall is inclined, which facilitates the powder to gather inside. After screening, the holding box 81 can be pulled out along the second sliding frame 14 by holding the handle 83. The screened powder can be taken out by opening the sealing door 82 hinged on one side.
[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A multi-stage sieving device for producing skin-friendly powder, comprising a sieving box (1), a primary sieving structure (5), a secondary sieving structure (6), a tertiary sieving structure (7), and a holding structure (8), characterized in that, The upper part of the inner wall of both sides of the powder sieving box (1) is provided with a sliding groove (11), and a primary sieving structure (5) is slidably connected in the sliding groove (11). Two first sliding frames (12) are longitudinally fixedly connected in the middle of the inner wall of both sides of the powder sieving box (1). A secondary sieving structure (6) is slidably connected on the first sliding frame (12). A tertiary sieving structure (7) is slidably connected below the secondary sieving structure (6) and on the first sliding frame (12). Two second sliding frames (14) are fixedly connected to the bottom wall of the powder sieving box (1). A holding structure (8) is slidably connected on the second sliding frame (14).
2. The multi-stage sieving device for producing skin-friendly powder according to claim 1, characterized in that, The primary screening structure (5) includes a first screening box (51), a first screening plate (52), a slide (53), a damping spring (54), a connecting plate (55), a connecting groove (56), and a protective frame (57). The first screening box (51) is fixedly connected to the bottom of the first screening plate (52), and the connecting plate (55) is fixedly connected to both sides of the bottom of the first screening box (51). The protective frame (57) is fixedly connected to both sides of the bottom of the connecting plate (55), and the damping spring (54) is fixedly connected inside the protective frame (57) and at the bottom of the connecting plate (55).
3. The multi-stage sieving device for producing skin-friendly powder according to claim 2, characterized in that, The damping spring (54) is fixedly connected to a slide (53) corresponding to the slide groove (11) on the other side. The slide (53) is slidably connected to the slide groove (11), and the slide (53) is connected to the powder screening box (1) by screw thread. The top two sides of the slide (53) are provided with connecting grooves (56) corresponding to the protective frame (57). The connecting grooves (56) are slidably connected to the protective frame (57). The first cabinet door is hinged to one edge of the first screening box (51).
4. The multi-stage sieving device for producing skin-friendly powder according to claim 1, characterized in that, The secondary screening structure (6) includes a second screening box (61), a second screening plate (62), a first sliding groove (63), a fixed plate (64), and a fixed rod (65). The second screening box (61) is fixedly connected to the bottom of the second screening plate (62). The lower parts of both sides of the second screening box (61) are fixedly connected to the fixed plate (64). The fixed plate (64) has two first sliding grooves (63) on both sides that correspond to the first sliding frame (12). The first sliding grooves (63) are slidably connected to the first sliding frame (12). The fixed rod (65) is fixedly connected to the middle of the bottom of the fixed plate (64). A second cabinet door is hinged to one edge of the second screening box (61).
5. The multi-stage sieving device for producing skin-friendly powder according to claim 1, characterized in that, The three-stage screening structure (7) includes a third screening box (71), a second sliding groove (72), a third screening plate (73), a connecting block (74), and a buffer spring (75). The bottom of the third screening box (71) is fixedly connected to the third screening plate (73). Two second sliding grooves (72) corresponding to the first sliding frame (12) are opened on both sides of the third screening box (71). The second sliding grooves (72) are slidably connected to the first sliding frame (12). A connecting block (74) is fixedly connected to one side edge of the bottom of the third screening box (71). Buffer springs (75) are fixedly connected to both sides of the bottom of the connecting block (74). The fixed rod (65) on the second-stage screening structure (6) is fixedly connected to the third screening box (71) on the side away from the fixed plate (64). A third cabinet door is hinged to one side edge of the third screening box (71).
6. The multi-stage sieving device for producing skin-friendly powder according to claim 1, characterized in that, The holding structure (8) includes a holding box (81), a sealing door (82), a handle (83), and a third sliding groove (84). The sealing door (82) is hinged to one edge of the holding box (81), and the handle (83) is fixedly connected to the lower part of one side of the holding box (81). The bottom sides of the holding box (81) are provided with a third sliding groove (84) corresponding to the second sliding frame (14). The third sliding groove (84) is slidably connected to the second sliding frame (14), and the bottom wall of the holding box (81) is inclined.
7. A multi-stage powder sieving device for producing skin-friendly powder according to claim 1, characterized in that, A protective door (2) is hinged to one side edge of the powder sieving box (1), an inlet (10) is fixedly connected to the top of the powder sieving box (1), a base (3) is fixedly connected to the bottom of the powder sieving box (1), anti-slip pads (4) are fixedly connected to the four corners of the bottom of the base (3), and a connecting frame (13) is fixedly connected to the lower part of the inner wall of one side of the powder sieving box (1).
8. A multi-stage sieving device for producing skin-friendly powder according to claim 1, characterized in that, A motor (9) is fixedly connected to the lower part of one side of the powder sieving box (1). A round shaft is fixedly connected to the power output shaft of the motor (9). The round shaft passes through the side of the powder sieving box (1) away from the motor (9) and extends into its interior. A rotating shaft (16) is fixedly connected to the round shaft and the powder sieving box (1). A fixing ring (17) is fixedly connected to the rotating shaft (16). A protrusion (15) is fixedly connected to the fixing ring (17).