A rotary vibrating screen feeding mechanism

Abstract

The present invention relates to the field of pharmaceutical processing technology, and discloses a rotary vibrating screen feeding mechanism, including a dust cover and a feeding pipe arranged in the middle of the dust cover, the inner side of the feeding pipe is threadedly connected to an outer cylinder, a connecting rod is fixedly installed on the top of the inner side of the outer cylinder, a connecting cylinder is fixedly installed on the other end of the connecting rod, and the connecting cylinder is located inside the outer cylinder. The rotary vibrating screen feeding mechanism, when the material falls onto the screen, the amount of material in the edge area of ​​the screen is greater than the amount of material in the center of the screen, the area with greater exciting force on the rotary vibrating screen has relatively more material falling into it, and the area with relatively smaller exciting force on the screen has relatively less material falling into it, which makes full use of the characteristics of the screen during screening (the vibration of the edge area of ​​the screen is greater than that of the center, so more material can be screened, and the screening effect of the edge area is also better than that of the center), thereby increasing the screening efficiency of the rotary vibrating screen.

Description

Technical Field

[0001] The invention relates to the technical field of pharmaceutical processing, in particular to a rotary vibrating screen feeding mechanism. Background Art

[0002] The rotary vibrating screen is used to screen the drug particles layer by layer. Small materials fall to the lower layer, and large materials fall from the edge of the screen through vibration and are removed (the principle of each layer is similar) until the drugs of the specified particle size are screened out. For the principle of the rotary vibrating screen, please refer to the attachment of the instruction manual. Figure 1 .

[0003] The existing rotary vibrating screen uses the function of the diversion guide plate to directly and evenly disperse the material onto the screen, so that the amount of material falling on the screen from the center to the edge area is basically the same. However, the exciting force (the closer the screen itself is to the connection with the screen box body, the greater the exciting force (vibration amplitude) (the transmission effect of the amplitude changes with the transmission distance), the closer to the center of the screen, the smaller the exciting force, the greater the exciting force, the greater the material vibration amplitude, and the better the screening effect) is used to screen the same amount of material in different areas, resulting in the structural characteristics of the screen (the exciting force in the edge area of ​​the screen is larger, and more material can be screened) cannot be fully utilized.

[0004] The supporting strength of the middle part of the screen is weaker than that of the fixed part on the outer edge, and the force strength in the middle part is relatively weak. The vibrating screen disperses the material evenly to various areas of the screen through the diversion guide plate. Although the impact of the material on the middle part is avoided, the diverted material still contains more large particles and falls to the middle part, which still has a certain impact on the screen. The long-term impact effect will still cause the middle part of the screen to collapse, deform, or even be damaged.

[0005] At the same time, when large materials and small materials fall to the middle of the screen at the same time, the small materials fall to the lower layer through the screen, and the large materials move to the edge area of ​​the screen through the vibration of the screen. Because the exciting force at the edge of the screen is greater than that in the middle area, it is difficult for the large materials in the middle of the screen to move quickly to the edge area through the vibration of the screen, resulting in the large materials staying on the screen for a long time, causing the subsequent granular materials to fail to fall to the next layer in time, and the material screening efficiency is low. Summary of the invention

[0006] The present invention provides a rotary vibrating screen feeding mechanism, which has the advantages of selectively dropping materials according to the structural characteristics of the screen, reducing the local impact effect of the screen and shortening the residence time of large materials on the screen, thereby solving the problems mentioned in the above background technology.

[0007] The present invention provides the following technical scheme: a rotary vibrating screen feeding mechanism comprises a dust cover and a feeding pipe arranged in the middle of the dust cover, the inner side of the feeding pipe is threadedly connected to an outer cylinder, the top of the inner side of the outer cylinder is fixedly installed with a connecting rod, the other end of the connecting rod is fixedly installed with a connecting cylinder, the connecting cylinder is located inside the outer cylinder, the top of the connecting cylinder is fixedly installed with an outer material dividing piece, the inner side of the connecting cylinder is threadedly connected to a middle cylinder, the top of the inner side of the middle cylinder is fixedly installed with a fixing rod, the other end of the fixing rod is fixedly connected with an inner cylinder, the inner cylinder is located inside the middle cylinder, the top of the inner cylinder is fixedly installed with an inner material dividing piece located inside the outer material dividing piece, the inner side of the inner cylinder is threadedly connected with a feeding pipe, the top of the feeding pipe is fixedly installed with a leakage head located outside the inner material dividing piece, the outer surface of the leakage head is provided with a vertically upward feeding hole, and the outer surface of the leakage head is bonded with an elastic pad.

[0008] Preferably, a first guide ring is fixedly installed on the bottom of the outer tube, a second guide ring located inside the first guide ring is fixedly installed on the bottom of the connecting tube, a third guide ring located inside the second guide ring is fixedly installed on the bottom of the middle tube, and an inner ring located inside the third guide ring is fixedly installed on the bottom of the inner tube, and the bottom ends of the first guide ring, the second guide ring, the third guide ring, the inner ring and the bottom end of the discharge pipe are located on the same horizontal plane.

[0009] Preferably, the outer dividing piece and the inner dividing piece are both truncated cones with a hollow interior and an open top, the tops of the outer dividing piece and the inner dividing piece are located in the same horizontal plane, and the diameter of the bottom end of the leakage head is matched with the diameter of the top opening of the inner dividing piece.

[0010] Preferably, a material drop hole is provided on the outer surface of the elastic pad, and the position and diameter of the material drop hole are the same as those of the material drop hole on the material leakage head.

[0011] Preferably, the tops of the outer cylinder, the connecting cylinder, the middle cylinder, the inner cylinder and the feeding pipe are located in the same horizontal plane.

[0012] Preferably, the diameter between the inner wall of the feed pipe and the top of the outer wall of the outer material dividing piece is successively larger than the diameter between the top of the inner wall of the outer material dividing piece and the top of the outer wall of the inner material dividing piece and the diameter of the leakage head.

[0013] Preferably, the lower parts of the outer cylinder, the connecting cylinder, the middle cylinder and the inner cylinder are all provided with a certain slope.

[0014] The present invention has the following beneficial effects:

[0015] The feeding mechanism of the rotary vibrating screen has a vertically upward dropping hole on the leakage head and an elastic pad bonded to the outer surface. A small part of the small particle material will enter the discharge pipe and finally fall on the center of the screen. The other part of the material that falls on the leakage head will be bounced to a position far away from the leakage head by the elastic pad and finally fall on the edge area of ​​the screen. When dropping, most of the material falls on the non-central part of the screen, realizing selective dropping. At the same time, since the diameter between the inner wall of the feed pipe and the outer dividing piece is larger than the diameter between the inner wall of the outer dividing piece and the outer wall of the inner dividing piece and The diameter of the leakage head forms three circles from the outside to the inside, and the material falls in layers at the same time, and the amount of material falling in each layer decreases successively; when the material falls onto the screen, the amount of material in the edge area of ​​the screen is greater than the amount of material in the center of the screen. The area with greater exciting force on the rotary vibrating screen has relatively more material falling into it, and relatively less material falling into the area with relatively smaller exciting force on the screen. The characteristics of the screen during screening are fully utilized (the vibration of the edge area of ​​the screen is greater than that of the center, so more material can be screened, and the screening effect of the edge area is also better than that of the center), which increases the screening efficiency of the rotary vibrating screen.

[0016] While the material is selectively dropped, large particles larger than the diameter of the drop hole on the leakage head will be bounced to an area far away from the drop head, and finally fall on the non-center part of the screen. Small particles enter the discharge pipe, and the materials falling on the center part of the screen do not contain large particles. On the one hand, the material is screened in advance and the screening effect of the rotary vibrating screen is improved. On the other hand, the impact of large particles on the middle part of the screen is avoided, the local impact effect of the screen is reduced, and the service life of the screen is increased.

[0017] While the material is being screened in advance, the larger the mass of the material, the more it will be bounced by the elastic pad to an area farther away from the drop head, and finally fall on the non-center part of the screen. Because the exciting force in the edge area of ​​the screen is greater than that in the center, the time for large particles to move to the drop port at the edge area of ​​the screen is reduced, thereby reducing the screening time of large particles. At the same time, since the large particles do not fall at the center of the screen and can be quickly moved to the drop port, the retention time of large particles on the screen is reduced, thus avoiding the accumulation of subsequent particles on the screen, thereby improving the efficiency of material screening. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the prior art of the present invention;

[0019] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0020] Figure 3 It is a top view of the outer cylinder, connecting cylinder, middle cylinder, inner cylinder and feeding pipe of the structure of the present invention;

[0021] Figure 4It is a top view of the outer material dividing piece and the inner material dividing piece of the present invention;

[0022] Figure 5 It is an enlarged schematic diagram of the structure at A of the present invention.

[0023] In the figure: 1. feed pipe; 2. outer tube; 3. connecting tube; 4. connecting rod; 5. middle tube; 6. inner tube; 7. fixing rod; 8. discharge pipe; 9. first guide ring; 10. second guide ring; 11. third guide ring; 12. inner ring; 13. outer dividing piece; 14. inner dividing piece; 15. leakage head; 16. dust cover; 17. elastic pad. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-5A rotary vibrating screen feeding mechanism comprises a dust cover 16 and a feeding pipe 1 arranged in the middle of the dust cover 16. The inner side of the feeding pipe 1 is threadedly connected with an outer cylinder 2. The outer cylinder 2, the connecting cylinder 3, the middle cylinder 5, the inner cylinder 6 and the feeding pipe 8 are connected from outside to inside and are located inside the feeding pipe 1. After entering the feeding pipe 1, the material is divided into three parts and discharged from the feeding pipe 8, the pores between the middle cylinder 5 and the inner cylinder 6, and the pores between the outer cylinder 2 and the connecting cylinder 3, so that the material presents a layered feeding phenomenon. The material is divided into three parts and falls on the screen from inside to outside in an annular shape, so that the area of ​​the screen can be fully utilized in the early stage of screening. At the same time, the amount of material falling in the middle of the screen is reduced, so that the impact force of the material on the middle of the screen is reduced. Dispersion reduces the impact of materials on the middle of the screen, reduces the damage rate of the screen, and prolongs the service life of the screen. A connecting rod 4 is fixedly installed on the top of the inner side of the outer cylinder 2, and a connecting cylinder 3 is fixedly installed on the other end of the connecting rod 4. The connecting cylinder 3 is located inside the outer cylinder 2, and an outer material dividing piece 13 is fixedly installed on the top of the connecting cylinder 3. The inner side of the connecting cylinder 3 is threadedly connected with a middle cylinder 5, and a fixing rod 7 is fixedly installed on the top of the inner side of the middle cylinder 5. The other end of the fixing rod 7 is fixedly connected with an inner cylinder 6, which is located inside the middle cylinder 5. An inner material dividing piece 14 located inside the outer material dividing piece 13 is fixedly installed on the top of the inner cylinder 6. The outer material dividing piece 13 covers part of the feeding port of the connecting cylinder 3, increasing the service life of the screen. The diameter between the inner wall of the feed pipe 1 and the outer material dividing piece 13 is increased, and the diameter between the inner wall of the outer material dividing piece 13 and the outer wall of the inner material dividing piece 14 is reduced, so that the amount of material falling from the inner wall of the feed pipe 1 and the outer material dividing piece 13 is successively greater than the amount of material falling from the inner wall of the outer material dividing piece 13 and the outer wall of the inner material dividing piece 14, and the amount of material screened and falling from the leakage head 15, the inner side of the inner cylinder 6 is connected with a discharge pipe 8 through a thread, and a leakage head 15 located on the outer side of the inner material dividing piece 14 is fixedly installed on the top of the discharge pipe 8, and a vertical upward discharge hole is opened on the outer surface of the leakage head 15, and the small particle material that is falling can directly pass through the vertical upward discharge hole when encountering it, and will not be in the leakage The material rolling in phenomenon occurs on the material head 15, and the material is prevented from clogging the drop hole. The outer surface of the leakage head 15 is bonded with an elastic pad 17. Through the vertical drop hole opened on the leakage head 15 and the elastic pad 17 bonded on the outer surface, a small part of the small particle material will enter the discharge pipe 8 and finally fall on the center of the screen. The other part of the material that falls on the leakage head 15 will be bounced to a position away from the leakage head 15 by the elastic pad 17, and finally fall on the edge area of ​​the screen. When dropping, more material falls to the non-central part of the screen, realizing selective dropping. The bonding between the leakage head 15 and the elastic pad 17 adopts the rubber and metal bonding process in the prior art, which will not be elaborated here.

[0026] Among them, a first guide ring 9 is fixedly installed at the bottom of the outer cylinder 2, a second guide ring 10 located inside the first guide ring 9 is fixedly installed at the bottom of the connecting cylinder 3, a third guide ring 11 located inside the second guide ring 10 is fixedly installed at the bottom of the middle cylinder 5, and an inner ring 12 located inside the third guide ring 11 is fixedly installed at the bottom of the inner cylinder 6. The bottom ends of the first guide ring 9, the second guide ring 10, the third guide ring 11, and the inner ring 12 and the bottom end of the discharge pipe 8 are located in the same horizontal plane. The first guide ring 9, the second guide ring 10, the third guide ring 11, and the inner ring 12 can make the material fall vertically to the screen to prevent the material from showing a tendency to fall entirely to the edge area due to inertia, which will cause some material to be too close to the edge area of ​​the screen and fall directly from the drop port, affecting the screening effect.

[0027] Among them, the outer material dividing piece 13 and the inner material dividing piece 14 are both truncated cones with hollow interiors and open tops, so that materials can be dropped from the gap between the outer material dividing piece 13 and the inner material dividing piece 14. The tops of the outer material dividing piece 13 and the inner material dividing piece 14 are located in the same horizontal plane. When the selective dropping of materials is carried out using the leakage head 15 and the elastic pad 17, the rationality of the dropping of materials can be guaranteed to prevent the tops of the two material dividing pieces from being in the same horizontal plane and blocking the materials, thereby ensuring that the materials can fall into different areas according to their quality, and the diameter of the bottom end of the leakage head 15 is adapted to the diameter of the top opening of the inner material dividing piece 14. The adaptation here means that the diameter of the bottom end of the leakage head 15 is slightly larger than the diameter of the top opening of the inner material dividing piece 14. When the discharge pipe 8 is installed, the elastic pad 17 of the rotating discharge pipe 8 is deformed under pressure and moves from the inside to the outside of the inner material dividing piece 14, preventing the materials from falling into the gap between the leakage head 15 and the inner material dividing piece 14, thereby avoiding the waste of materials.

[0028] Among them, the outer surface of the elastic pad 17 is provided with a blanking hole, the elastic pad 17 is non-toxic silicone rubber, and has the same position and diameter as the blanking hole on the leakage head 15, ensuring that the material can smoothly enter the blanking hole on the leakage head 15 after passing through the blanking hole on the elastic pad 17.

[0029] The tops of the outer tube 2, the connecting tube 3, the middle tube 5, the inner tube 6 and the feeding tube 8 are located in the same horizontal plane.

[0030] Among them, the diameter between the inner wall of the feed pipe 1 and the top of the outer wall of the outer dividing piece 13 is successively larger than the diameter between the top of the inner wall of the outer dividing piece 13 and the top of the outer wall of the inner dividing piece 14 and the diameter of the leakage head 15. Combined with the function of the leakage head 15 and the elastic pad 17, three circles of simultaneous layered material dropping from the outside to the inside are formed, and the amount of material dropped in each layer decreases successively; when the material falls onto the screen, the amount of material in the edge area of ​​the screen is greater than the amount of material in the center of the screen, the area with greater exciting force on the rotary vibrating screen has relatively more material falling into it, while the area with relatively smaller exciting force on the screen has relatively less material falling into it, which makes full use of the characteristics of the screen during screening and increases the screening efficiency of the rotary vibrating screen.

[0031] Among them, the lower parts of the outer cylinder 2, the connecting cylinder 3, the middle cylinder 5 and the inner cylinder 6 are all provided with a certain slope, which plays a certain buffering role on the falling materials, reduces the impact force of the materials on the screen, and improves the service life of the screen.

[0032] Working principle: First, tighten the outer side of the discharge pipe 8 with the inner side of the inner tube 6 and make the leakage head 15 located outside the inner dividing piece 14, then tighten the outer edge of the middle tube 5 with the inner side of the connecting tube 3, and finally tighten the outer tube 2 with the inner cavity of the feed pipe 1 to complete the assembly of the feeding mechanism; then assemble the dust cover 16 with the rotary vibrating screen (the assembly process of the dust cover and the rotary vibrating screen body belongs to the prior art and will not be described here), and directly connect the top of the rotary vibrating screen feed pipe 1 with the pipeline for inputting materials. When the material falls into the inside of the feed pipe 1, when the material falls on the leakage head 15, the material smaller than the diameter of the drop hole on the leakage head 15 will fall into the inside of the discharge pipe 8 and fall from the bottom of the discharge pipe 8 to the center of the screen, while the large particle material that cannot pass through the drop hole and the small particle material that falls on the elastic pad 17 between the drop holes are bounced to the inside of the feed pipe 1 according to their mass. The material enters the pores between the outer tube 2 and the connecting tube 3 through the area between the wall and the outer material dividing piece 13, and enters the pores between the middle tube 5 and the inner tube 6 through the area between the inner wall of the outer material dividing piece 13 and the outer wall of the inner material dividing piece 14, and falls to the non-center position of the screen from the bottom end between the first guide ring 9 and the second guide ring 10, and from the bottom end between the third guide ring 11 and the inner ring 12 respectively. At the same time, part of the material will fall from the pores between the outer edge of the outer material dividing piece 13 and the inner wall of the feed pipe 1 into the pores between the outer tube 2 and the connecting tube 3, and finally fall from the bottom end between the first guide ring 9 and the second guide ring 10 to the near-edge area of ​​the screen, and another part of the material will enter the pores between the middle tube 5 and the inner tube 6 from the pores between the outer material dividing piece 13 and the inner material dividing piece 14, and finally fall to the non-center position of the screen from the bottom end between the third guide ring 11 and the inner ring 12.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotary vibrating screen feeding mechanism, comprising a dust cover (16) and a feeding pipe (1) arranged in the middle of the dust cover (16), characterized in that: The inner side of the feed pipe (1) is threadedly connected to the outer cylinder (2), the top of the inner side of the outer cylinder (2) is fixedly installed with a connecting rod (4), the other end of the connecting rod (4) is fixedly installed with a connecting cylinder (3), the connecting cylinder (3) is located inside the outer cylinder (2), the top of the connecting cylinder (3) is fixedly installed with an outer material dividing piece (13), the inner side of the connecting cylinder (3) is threadedly connected to the middle cylinder (5), the top of the inner side of the middle cylinder (5) is fixedly installed with a fixing rod (7), the other end of the fixing rod (7) is fixedly connected to the inner cylinder (6), the inner cylinder (6) is located inside the middle cylinder (5), the top of the inner cylinder (6) is fixedly installed with an inner material dividing piece (14) located inside the outer material dividing piece (13), the inner cylinder (6) is threadedly connected to the inner ... inner cylinder (6) is fixedly connected with an inner material dividing piece (14) located inside the outer material dividing piece (13), the inner cylinder (6) is threadedly connected to the inner cylinder (5), the inner cylinder (6) is fixedly connected with an inner material dividing piece (14) located inside the outer material dividing piece (13), the inner cylinder (6) is threadedly connected to the inner cylinder (5), the inner cylinder (6) is fixedly connected with an inner material dividing piece (14) located inside the outer material dividing piece (13), the inner cylinder (6) is threadedly connected to the inner cylinder (5), the inner cylinder (3) is threadedly connected to the inner cylinder (5), the top of the inner cylinder (6) is fixedly installed with an inner material dividing piece (14) located inside the outer material dividing piece (13), the inner cylinder (6) is threadedly connected to the inner cylinder (5), the inner cylinder The inner side of the cylinder (6) is threadedly connected with a feeding tube (8), and a feeding head (15) located outside the inner dividing piece (14) is fixedly installed at the top of the feeding tube (8), and a feeding hole vertically upward is provided on the outer surface of the feeding head (15), and an elastic pad (17) is bonded to the outer surface of the feeding head (15), and the outer dividing piece (13) and the inner dividing piece (14) are both truncated cones with hollow interiors and open tops, and the tops of the outer dividing piece (13) and the inner dividing piece (14) are located in the same horizontal plane, and the diameter of the bottom end of the feeding head (15) is matched with the diameter of the top opening of the inner dividing piece (14), and the outer surface of the elastic pad (17) is provided with a feeding hole, and the position and diameter of the feeding hole on the feeding head (15) are consistent with each other. The diameters of the feed pipe (1) and the outer wall top of the outer material dividing member (13) are the same, the diameter between the inner wall of the feed pipe (1) and the outer wall top of the outer material dividing member (13) is larger than the diameter between the inner wall top of the outer material dividing member (13) and the outer wall top of the inner material dividing member (14) and the diameter of the leakage head (15) in turn, the bottom of the outer tube (2) is fixedly mounted with a first guide ring (9), the bottom of the connecting tube (3) is fixedly mounted with a second guide ring (10) located inside the first guide ring (9), the bottom of the middle tube (5) is fixedly mounted with a third guide ring (11) located inside the second guide ring (10), the bottom of the inner tube (6) is fixedly mounted with an inner ring (12) located inside the third guide ring (11), the first guide ring (9), the second guide ring (10), and the third guide ring (11) are fixedly mounted with a plurality of inner rings (12) located inside the third guide ring (11). The bottom ends of the flow ring (11) and the inner ring (12) and the bottom end of the discharge pipe (8) are located at the same horizontal plane, and the tops of the outer cylinder (2), the connecting cylinder (3), the middle cylinder (5), the inner cylinder (6) and the discharge pipe (8) are located at the same horizontal plane. When the material falls onto the discharge head, the material smaller than the diameter of the discharge hole on the discharge head will fall into the inside of the discharge pipe and fall from the bottom of the discharge pipe to the center of the screen. The large particles that cannot pass through the discharge hole and the small particles that fall on the elastic pads between the discharge holes are respectively bounced to the area between the inner wall of the feed pipe and the outer distribution piece according to their mass, and enter the pores between the outer cylinder and the connecting cylinder and the area between the inner wall of the outer distribution piece and the outer wall of the inner distribution piece, and enter the pores between the middle cylinder and the inner cylinder.And they fall to the non-center position of the screen from the bottom end between the first guide ring and the second guide ring, and the bottom end between the third guide ring and the inner ring.

2. A rotary vibrating screen feeding mechanism according to claim 1, characterized in that: The lower parts of the outer tube (2), the connecting tube (3), the middle tube (5) and the inner tube (6) are all provided with a certain slope.

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