Pharmaceutical dust-free screening and feeding device and feeding method

Abstract

The invention belongs to the technical field of pharmaceutical production equipment, and provides a dust-free screening and feeding device for pharmacy and a feeding method. A conveyor belt; a turntable; and a cutting knife. Through the arrangement of the plurality of rotating discs and the material boxes, material powder falls into the plurality of material boxes, and the material powder is transferred to the screen part by part through the plurality of material boxes, so that the amount of powder discharged from the outlet every time is relatively small, the amount of dust raised after the small amount of material powder impacts the screen is relatively small, and the dust raising range is relatively small; in this way, the amount of dust passing through the filter element in the negative pressure mechanism can be effectively prevented from being too large, the situation that the service life of the filter element is shortened due to the fact that the amount of dust passing through the filter element is too large is effectively avoided, meanwhile, dust is effectively prevented from being adsorbed to the inner wall of the feeding box, and waste of material powder is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of pharmaceutical production equipment, and in particular relates to a dust-free screening and feeding device and a feeding method for pharmaceuticals. Background Art

[0002] In the field of pharmaceutical production, the use of powdered raw materials is a normal requirement and plays an indispensable role in the product manufacturing process. In order to ensure the smoothness and efficiency of the production process, the orderly feeding of powdered materials becomes a key link. For this reason, the feeding station, as a professional equipment to achieve this purpose, is widely used in pharmaceutical production lines.

[0003] At present, when feeding, it is necessary to manually put the material bag into the feeding box and pour out the powder. In this process, the poured powder will be blocked by the screen and impacted, which will raise a lot of dust. Although there are negative pressure extraction related mechanisms to extract the oxygen and dust, there will still be a lot of dust overflowing from the feed port to the outside of the feeding box. These dusts are difficult to be extracted, which is easy to endanger the health of the staff.

[0004] In response to the above-mentioned technical problems, the applicant has retrieved some prior arts to solve the current problem of dust being raised to the outside of the feeding box. For example, the document of the domestic patent application CN202320940592.X records a powder bag feeding station, whose main technical means is to design a bag pushing mechanism to achieve the pushing movement effect of the powder material bag, so that it can automatically complete bag breaking and feeding during movement, and because the above-mentioned operation is carried out in a closed environment, it can effectively prevent dust from overflowing. However, after the bag is broken, the powder falls in a pouring manner. In this way, after the powder is blocked by the screen, a large amount of dust will be raised. If all of this dust is absorbed by the negative pressure extraction mechanism, the flow rate of dust passing through the filter element in the negative pressure extraction mechanism will increase, thereby reducing the service life of the filter element. At the same time, compared with the traditional feeding method, the dust is raised in a larger range, which makes it easy for the dust to be adsorbed on the inner wall of the feeding box, and it is difficult for this dust to be absorbed by the negative pressure extraction mechanism, resulting in a large amount of powder waste. Summary of the invention

[0005] The purpose of the present invention is to provide a dust-free screening and feeding device and feeding method for pharmaceutical use, aiming to solve the technical problem in the prior art that the amount of dust increases when breaking bags and feeding in a feeding box, thereby reducing the service life of the filter element and causing a large amount of powder waste.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A dust-free screening and feeding device for pharmaceutical use, comprising a feeding box, a discharging cylinder, a screen, a vibrating member, a negative pressure mechanism and a feeding pipe, the device also comprising: A batching box, wherein the batching box is installed in the feeding box and the batching box is located above the screen; Conveyor belts: two conveyor belts are installed horizontally through the feeding box, and the conveyor belts are located above the batching box. The two conveyor belts are used to transport bagged powder bags; Turntable, a plurality of turntables are installed in the batching box, a driving member 1 is installed on the feeding box, the output end of the driving member 1 extends into the feeding box and passes through the plurality of turntables, a plurality of material boxes are arranged on the periphery of the turntable, an inlet and an outlet are respectively opened at the top and bottom of the batching box, and the inlet is located between the two conveyor belts; Cutting knife: a horizontal plate is arranged on the side of the batching box in the opposite direction of the conveyor belt, the horizontal plate separates the two conveyor belts, and the surface of the horizontal plate is flush with the top of the conveyor belt. A cutting knife is arranged on the horizontal plate, and the blade of the cutting knife faces the opposite direction of the conveyor belt.

[0007] As a preferred embodiment of the above technical solution, the conveyor belt is divided into a horizontal section, a twisted section and a vertical section. A plurality of hooks are arranged on the conveyor belt. The plurality of hooks on the two conveyor belts are symmetrical. Two adjacent groups of hooks are used to hook the four bag corners of the bagged powder bag. The hooks are L-shaped and are inclined horizontally with the conveyor belt. The hooks on the two conveyor belts are facing the horizontal plate.

[0008] As a preferred embodiment of the above technical solution, a feed door is rotatably installed on one side of the feeding box, and the horizontal section of the conveyor belt passes through the feed door. A discharge box is installed on the other side of the feeding box, and the end of the vertical section of the conveyor belt is located in the discharge box. A discharge door is rotatably installed on the discharge box.

[0009] As a preferred embodiment of the above technical solution, a dispersing mechanism is installed at the bottom of the batching box, and the dispersing mechanism is located above the screen, and the dispersing mechanism includes: Driving member 2, driving members 2 are installed on both sides of the feeding box; The movable plates are provided with two pieces, the output ends of the two sets of driving members 2 are respectively fixedly connected to one side of the two movable plates, and the rotation axes of the two movable plates are the same, and the two sets of driving members 2 drive the two movable plates to move toward each other or away from each other; A guide plate is provided at the bottom of the batching box, the guide plate is located at the outlet, the guide plate is in a herringbone shape and covers the top of the rotating parts of the two movable plates.

[0010] As a preferred embodiment of the above technical solution, an expansion block is arranged on the horizontal plate, the expansion block is located on the side opposite to the cutting knife blade, the expansion block has inclined surfaces symmetrically opened on the side facing the cutting knife, and the top of the expansion block is wide and the bottom is narrow.

[0011] As a preferred embodiment of the above technical solution, the top of the batching box is symmetrically provided with side guard plates, the side guard plates are located on both sides of the inlet, and the side guard plates are located on the inner side of the conveyor belt, and an opening mechanism is installed between the two side guard plates, and the opening mechanism includes: A movable rod, both ends of which are rotatably mounted with rollers, movable grooves are provided on opposite sides of the two side guard plates, the rollers are located in the movable grooves, the movable grooves are in a circular shape, and the upper half of the movable grooves is in a horizontal state and the lower half is in an inclined state, and a plurality of fixed rods are provided on one side of the conveyor belt, and the fixed rods are used to push the movable rod to move along the movable grooves; A support rod, a fixed plate is fixed on the top of the movable rod, a support rod is symmetrically mounted on the top of the fixed plate, and the support rod is used to open the powder bag; An extrusion rod and a push rod, wherein an extrusion rod is symmetrically and movably installed in the movable rod, and a push rod is movably installed in the fixed plate, a wedge block is arranged at the bottom of the push rod, and the wedge block passes through the fixed plate and the movable rod, one end of the extrusion rod is against the inclined surface of the wedge block, a connecting rod is arranged at the top of the push rod, and the two ends of the connecting rod are respectively slidably connected with two support rods, a fixing strip is arranged at the upper half of the movable groove, and one end of the extrusion rod passes through a roller, and when the movable rod moves, the extrusion rod is squeezed and compressed into the movable rod by the fixing strip, and an elastic member is installed between the push rod and the inner cavity of the fixed plate; A fixed frame and a guide block, the bottom of the movable rod is symmetrically provided with a fixed frame, the side guard plate is provided with a guide groove, the guide block is movably installed in the guide groove, and the guide block passes through the fixed frame.

[0012] As a preferred embodiment of the above technical solution, an installation groove is provided on the side guard plate, a telescopic part is installed in the installation groove, a push block is provided at the output end of the telescopic part, the surface of the push block is connected with the movable groove, and the push block faces the lower half of the movable groove.

[0013] As a preferred embodiment of the above technical solution, a plurality of baffles are arranged between the two side guard plates, the baffles are located at the vertical section of the conveyor belt, and the heights of the plurality of baffles become higher and higher toward the moving direction of the conveyor belt, and the plurality of baffles are in a stepped shape.

[0014] A feeding method for a dust-free screening and feeding device for pharmaceutical use, the method is applied to the dust-free screening and feeding device for pharmaceutical use as described above, and the method comprises the following steps: Step S1: Place the powder bags in bags on the horizontal sections of two conveyor belts, hook the four corners of the powder bags with four hooks, and the two conveyor belts convey the powder bags into the feeding box. When the powder bags move to the cutting knife, the cutting knife cuts the bottom of the powder bags; Step S2: When the bottom of the powder bag is cut and continues to move, the slit at the bottom of the powder bag first contacts the expansion block, and the expansion block slowly enters the inside of the powder bag, so that the slit of the powder bag slowly expands, and at the same time cooperates with the expansion mechanism to make the slit continue to expand, and the powder bag slowly moves to the twisted section and the vertical section of the conveyor belt, so that the powder bag is bent and the slit at the bottom is expanded, so as to speed up the discharge; Step S3: After the bottom of the powder bag is cut open, the powder bag continues to move, and the powder enters into a plurality of material boxes through the inlet. The material boxes are rotated to the outlet by the rotation of the turntable, and the powder is discharged from the outlet. At this time, the two movable plates are moved toward or away from each other by the two driving members 2, and the powder falls evenly on the screen under the guidance of the two movable plates; Step S4: The vibrating element vibrates the screen to make it screen the powder. The screened powder is discharged through the extraction pipe, and the negative pressure mechanism extracts the raised dust.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by setting a plurality of turntables and material boxes, the powder material falls into a plurality of material boxes, and a small amount of powder material is transferred to the screen through the plurality of material boxes. In this way, the amount of powder material discharged from the outlet each time is relatively small, and the amount of dust raised after a small amount of powder material impacts the screen is relatively small, and the range of dust raising is small, which can effectively avoid excessive dust passing through the filter element in the negative pressure mechanism, thereby effectively avoiding the reduction of the service life of the filter element due to excessive dust flow through the filter element, and also effectively avoiding the dust from being adsorbed on the inner wall of the feeding box, thereby avoiding the waste of powder material; 2. In the present invention, since the amount of powder on the screen each time is relatively small, the screen can quickly screen the powder and be sucked away by the extraction pipe, which can reduce the residence time of the powder on the screen, thereby further suppressing the dust from being raised; 3. In the present invention, by arranging the two conveyor belts into horizontal sections, twisted sections and vertical sections, the stability of the powder falling after the powder bag is cut is ensured, and the powder bag is prevented from uncontrollably bending from the middle after being cut, and the powder falling speed is prevented from being uncontrolled, thereby effectively preventing a large amount of dust from being raised; at the same time, the two halves of the powder bag are facing downward at the end, so that the powder in the powder bag can be discharged cleanly, thereby effectively avoiding the waste of powder; 4. In the present invention, by providing a dispersion mechanism, the powder discharged from the outlet can be evenly distributed on the screen, thereby effectively preventing the powder from falling directly onto the screen and being impacted to raise a large amount of dust, thereby effectively suppressing the raising of dust; at the same time, the powder is evenly distributed on the screen, which can speed up the speed of the incoming powder passing through the screen, further improving the screening efficiency of the screen for the powder, thereby further reducing the residence time of the powder on the screen, and further suppressing the raising of dust; 5. In the present invention, by providing an expansion block and a propping mechanism, the slit of the powder bag is always in an expanded state during the movement of the powder bag, thereby further accelerating the falling speed of the powder, and cooperating with two conveyor belts to control the falling speed of the powder in the powder bag, thereby avoiding the uncontrolled falling speed of the powder and generating a large amount of dust, and improving the feeding efficiency; 6. In the present invention, by providing a plurality of step-shaped baffles, when the powder bag moves to the vertical section of the two conveyor belts, the powder bag will pass over the baffles and shake, and will shake several times when passing through a plurality of baffles. Moreover, since the plurality of baffles are in a step-shaped manner, the shaking frequency of the powder bag becomes higher and higher, thereby shaking a small amount of powder in the powder bag, thereby draining the powder in the powder bag, and effectively avoiding the waste of powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the internal structure of the feeding box; Figure 3 It is a schematic diagram of some structures after being disassembled and an enlarged schematic diagram of some structures; Figure 4 Schematic diagram of the cutting knife structure; Figure 5 It is a schematic diagram of the turntable and material box structure; Figure 6 It is an enlarged schematic diagram of the dispersion mechanism and some structures; Figure 7 This is an enlarged schematic diagram of the opening mechanism and some structures; Figure 8 It is a schematic diagram of the cross-sectional structure of the expansion mechanism.

[0017] In the figure: 1. Feeding box; 2. Discharging barrel; 21. Screen; 22. Vibrating element; 3. Material box; 31. Inlet; 32. Outlet; 33. Driving element 1; 34. Horizontal plate; 4. Conveyor belt; 41. Hook; 42. Fixed rod; 5. Turntable; 51. Material box; 6. Side guard plate; 61. Movable groove; 62. Guide groove; 63. Fixed strip; 64. Mounting groove; 65. Telescopic element; 66. Push block; 7. Opening mechanism; 71. Movable rod; 71 1. Roller; 72. Fixed plate; 73. Support rod; 74. Extrusion rod; 75. Push rod; 751. Wedge block; 752. Connecting rod; 76. Elastic member; 77. Fixed frame; 78. Guide block; 8. Dispersion mechanism; 81. Driving member 2; 82. Movable plate; 83. Guide plate; 9. Baffle; 10. Cutter; 11. Extension block; 12. Feed gate; 13. Discharge box; 131. Discharge gate; 14. Negative pressure mechanism; 15. Extraction pipe. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0020] like Figure 1-Figure 5 As shown, a dust-free screening and feeding device for pharmaceutical use comprises a feeding box 1, a discharging cylinder 2, a screen 21, a vibrating member 22, a negative pressure mechanism 14 and a drawing pipe 15, and the device further comprises: The batching box 3 is installed in the feeding box 1, and the batching box 3 is located above the screen 21; Conveyor belt 4: two conveyor belts 4 are installed horizontally through the feeding box 1. The conveyor belts 4 are located above the batching box 3. The two conveyor belts 4 are used to transport the bagged powder bags; Turntable 5, several turntables 5 are installed in the batching box 3, a driving member 33 is installed on the feeding box 1, the output end of the driving member 33 extends into the feeding box 1 and passes through the several turntables 5, and several material boxes 51 are arranged on the periphery of the turntable 5. The top and bottom of the batching box 3 are respectively provided with an inlet 31 and an outlet 32, and the inlet 31 is located between the two conveyor belts 4; A cutting knife 10 is provided on the side of the batching box 3 in the opposite direction of the movement of the conveyor belt 4. A horizontal plate 34 is provided, which separates the two conveyor belts 4. The surface of the horizontal plate 34 is flush with the top of the conveyor belt 4. A cutting knife 10 is provided on the horizontal plate 34. The blade of the cutting knife 10 faces the opposite direction of the movement of the conveyor belt 4.

[0021] In one case of this embodiment, the driving member 33 may be a motor, or a component capable of driving the turntable 5 to rotate.

[0022] In actual application of this embodiment, the powder bag is placed on two conveyor belts 4, and the powder bag is conveyed to the feeding box 1 through the conveyor belts 4. When the powder bag contacts the cutting knife 10, the cutting knife 10 slowly cuts the bottom of the powder bag, and the powder bag continues to move. The powder in the powder bag will enter the plurality of material boxes 51 through the inlet 31. The plurality of turntables 5 drive the plurality of material boxes 51 to rotate through the driving member 33, so that the powder in the material box 51 rotates to the outlet 32 ​​and falls from the outlet 32 ​​onto the screen 21 below. The screen 21 and the vibrating member 22 cooperate to screen the powder; thus, the amount of powder discharged from the outlet 32 ​​each time is relatively small, and the amount of dust raised after a small amount of powder impacts the screen 21 is relatively small, and the range of dust raising is small, which can effectively avoid excessive dust passing through the filter element in the negative pressure mechanism 14, thereby effectively avoiding the reduction of the service life of the filter element due to excessive dust flow through the filter element, and also effectively avoiding dust adsorbed on the inner wall of the feeding box 1, avoiding waste of powder; When the screen 21 and the vibrating member 22 cooperate to screen the powder, since the amount of powder on the screen 21 is relatively small each time, the screen 21 can quickly screen the powder and the powder is sucked away by the extraction pipe 15, which can reduce the residence time of the powder on the screen 21, thereby further suppressing the dust from being raised; When the powder enters the batching box 3 through the inlet 31, the powder is in a completely sealed state inside the batching box 3 until it is discharged from the outlet 32. Through this process, the powder is divided into small portions and transferred to the screen 21 instead of pouring down directly. This can effectively prevent the powder from raising dust during the falling process, thereby further suppressing the raising of dust. When the powder bag is being transported by the two conveyor belts 4, the bottom of the powder bag is in close contact with the two conveyor belts 4; after the powder bag is cut, the bottom of the powder bag is divided into two halves, and the two halves are in close contact with the surfaces of the two conveyor belts 4 respectively until the powder is completely discharged from the bag. In this way, when the powder falls into the material box 51, only the two ends of the inlet 31 at the bottom of the powder bag are in a hollow state, which can reduce the space for dust to be raised, thereby further suppressing the dust from being raised.

[0023] Furthermore, the conveyor belt 4 is divided into a horizontal section, a twisted section and a vertical section. A plurality of hooks 41 are provided on the conveyor belt 4. The plurality of hooks 41 on the two conveyor belts 4 are symmetrical. Two adjacent groups of hooks 41 are used to hook the four bag corners of the bagged powder bag. The hooks 41 are L-shaped, and the hooks 41 are in a state of being inclined horizontally with the conveyor belt 4. The hooks 41 on the two conveyor belts 4 are both facing the horizontal plate 34.

[0024] In one aspect of this embodiment, the two conveyor belts 4 are symmetrical along the inlet 31 .

[0025] In actual application of this embodiment, four hooks 41 are used to fix the four bag corners of the powder bag, so that on the one hand, it can ensure that the powder bag is not easily offset when moving on the two conveyor belts 4, so that the bottom of the powder bag can be cut by the cutting knife 10, and on the other hand, it can ensure the stability of the powder falling after the powder bag is cut, and prevent the powder bag from uncontrollably bending from the middle after being cut, and prevent the powder from falling at an uncontrolled speed, thereby effectively preventing a large amount of dust from being raised; by hooking the powder bag with four hooks 41, during the process of the powder falling, the powder bag can be effectively prevented from passing through the inlet 31 into the material box 51, thereby ensuring a smooth feeding process; During the movement, the powder bag first passes through the horizontal sections of the two conveyor belts 4, and then passes through the twisted section and the vertical section, so that the powder bag slowly turns upward from the horizontal state and folds in half, so that the falling speed of the powder is controlled, avoiding the uncontrolled falling speed of the powder and generating a large amount of dust. At the same time, the two halves of the powder bag are facing downward at the end, so that the powder in the powder bag can be discharged cleanly, thereby effectively avoiding the waste of powder.

[0026] Furthermore, a feed gate 12 is rotatably installed on one side of the feeding box 1, and the horizontal section of the conveyor belt 4 passes through the feed gate 12. A discharge box 13 is installed on the other side of the feeding box 1, and the end of the vertical section of the conveyor belt 4 is located in the discharge box 13. A discharge door 131 is rotatably installed on the discharge box 13.

[0027] When the present embodiment is actually applied, the rotating parts of the feed door 12 and the discharge door 131 can be provided with torsion springs, so that the feed door 12 and the discharge door 131 can quickly return to their original positions after being turned over, so that the feeding box 1 can maintain a sealed state for a long time, effectively preventing dust from overflowing and wasting powder. When the powder bag moves on the two conveyor belts 4, it will push the feed door 12 to turn the feed door 12 over, so that the powder bag can enter the feeding box 1. When the powder bag moves to the vertical section of the two conveyor belts 4, the powder in the powder bag is almost discharged, and the end of the vertical section is located in the discharge box 13. Since the hooks 41 are in a horizontally inclined state with the conveyor belt 4, the hooks 41 on the two conveyor belts 4 are facing the horizontal plate 34. When the two conveyor belts 4 are in a vertical state, the powder bag will slowly slide down from the four hooks 41, and the powder bag will fall into the discharge box 13, and finally be discharged through the discharge door 131.

[0028] like Figure 5 and Figure 6 As shown, a dispersing mechanism 8 is installed at the bottom of the batching box 3, and the dispersing mechanism 8 is located above the screen 21. The dispersing mechanism 8 includes: A second driving member 81 is installed on both sides of the feeding box 1; The movable plate 82 is provided with two pieces, the output ends of the two sets of driving members 81 are respectively fixedly connected to one side of the two movable plates 82, and the rotation axes of the two movable plates 82 are the same, and the two sets of driving members 81 drive the two movable plates 82 to move toward or away from each other; A guide plate 83 is provided at the bottom of the batching box 3 . The guide plate 83 is located at the outlet 32 ​​. The guide plate 83 is in a herringbone shape and covers the top of the rotating parts of the two movable plates 82 .

[0029] In one case of this embodiment, the second driving member 81 may be a motor, or a component capable of driving the movable plate 82 to rotate.

[0030] In actual application of this embodiment, in the initial state, the two movable plates 82 are away from each other. When the powder is discharged from the outlet 32, the two movable plates 82 are moved toward each other by the two sets of driving members 81. The powder first falls onto the two movable plates 82 respectively under the guidance of the guide plate 83. The two movable plates 82 move toward each other, so that the powder slides up and down on the movable plates 82 and falls onto the screen 21. In this way, the powder is evenly distributed on the screen 21 from the outside to the inside, thereby effectively preventing the powder from falling directly onto the screen 21 and being impacted to raise a large amount of dust, thereby effectively suppressing the raising of dust. At the same time, the powder is evenly distributed on the screen 21, which can speed up the speed of the incoming powder passing through the screen 21, further improve the screening efficiency of the screen 21 for the powder, thereby further reducing the residence time of the powder on the screen 21, and further suppressing the dust from being raised; in addition, quickly screening out the powder can avoid the accumulation of powder that falls later, thereby ensuring the screening efficiency.

[0031] like Figure 3 , Figure 4 Figure 7 and Figure 8 As shown, an expansion block 11 is provided on the horizontal plate 34, and the expansion block 11 is located on the side opposite to the blade of the cutter 10. The expansion block 11 has inclined surfaces symmetrically opened on one side facing the cutter 10, and the top of the expansion block 11 is wide and the bottom is narrow.

[0032] The top of the batching box 3 is symmetrically provided with side guard plates 6, which are located on both sides of the inlet 31 and the inner side of the conveyor belt 4. An opening mechanism 7 is installed between the two side guard plates 6. The opening mechanism 7 includes: A movable rod 71, both ends of which are rotatably mounted with rollers 711, movable grooves 61 are provided on opposite sides of the two side guard plates 6, the rollers 711 are located in the movable grooves 61, the movable grooves 61 are in a circular shape, and the upper half of the movable grooves 61 is in a horizontal state and the lower half is in an inclined state, and a plurality of fixed rods 42 are provided on one side of the conveyor belt 4, and the fixed rods 42 are used to push the movable rod 71 to move along the movable grooves 61; A support rod 73, a fixed plate 72 is fixed on the top of the movable rod 71, and a support rod 73 is symmetrically rotated and installed on the top of the fixed plate 72, and the support rod 73 is used to open the powder bag; Extrusion rod 74 and push rod 75, extrusion rod 74 is symmetrically installed in movable rod 71, push rod 75 is movably installed in fixed plate 72, wedge block 751 is arranged at the bottom of push rod 75, wedge block 751 passes through fixed plate 72 and movable rod 71, one end of extrusion rod 74 abuts against the inclined surface of wedge block 751, connecting rod 752 is arranged at the top of push rod 75, two ends of connecting rod 752 are respectively connected with two support rods 73 in sliding manner, fixing strip 63 is arranged at the upper half of movable groove 61, one end of extrusion rod 74 passes through roller 711, when movable rod 71 moves, extrusion rod 74 is squeezed and compressed into movable rod 71 by fixing strip 63, elastic member 76 is arranged between push rod 75 and the inner cavity of fixing plate 72; Fixed frame 77 and guide block 78 : The bottom of the movable rod 71 is symmetrically provided with a fixed frame 77 , a guide groove 62 is opened on the side guard plate 6 , the guide block 78 is movably installed in the guide groove 62 , and the guide block 78 passes through the fixed frame 77 .

[0033] In one case of this embodiment, the elastic member 76 may be a spring, or other elastically expandable and contractible member.

[0034] In actual application of this embodiment, when the bottom of the powder bag is cut and continues to move, the cut at the bottom of the powder bag first contacts the expansion block 11, and the expansion block 11 slowly enters the inside of the powder bag through the two inclined surfaces of the expansion block 11, so that the expansion block 11 expands the cut, so that the speed of powder falling can be accelerated, thereby improving the feeding efficiency while effectively avoiding the raising of dust; When the powder bag continues to move, the two support rods 73 enter the interior of the powder bag, and the fixed rod 42 on the conveyor belt 4 will push the movable rod 71 to move. After the movable rod 71 moves, the two squeezing rods 74 are squeezed and compressed by the fixed strip 63 into the movable rod 71, and the squeezing rod 74 squeezes the wedge block 751 to move the wedge block 751 downward, so that the push rod 75 drives the connecting rod 752 to move downward. The downward movement of the connecting rod 752 will slowly expand the two support rods 73, so that the two support rods 73 will keep the slit at the bottom of the powder bag in an expanded state, and cooperate with the expansion block 11 to The slit on the rear side of the bag is unfolded, so that the slit of the powder bag is always in an unfolded state during the movement of the powder bag, thereby further accelerating the falling speed of the powder, and cooperating with the two conveyor belts 4 to control the falling speed of the powder in the powder bag, while avoiding the uncontrolled falling speed of the powder and generating a large amount of dust, and at the same time improving the feeding efficiency; when the movable rod 71 moves to the lower part of the movable groove 61, since there is no fixed strip 63 in the lower half of the movable groove 61, the two squeezing rods 74, the push rod 75, the wedge block 751 and the connecting rod 752 return to their original positions in cooperation with the rebound ability of the elastic member 76.

[0035] Furthermore, a mounting groove 64 is provided on the side guard plate 6 , a telescopic member 65 is installed in the mounting groove 64 , a push block 66 is provided at the output end of the telescopic member 65 , a surface of the push block 66 is connected to the movable groove 61 , and the push block 66 faces the lower half of the movable groove 61 .

[0036] In one case of this embodiment, the telescopic member 65 may be a cylinder, or other components capable of driving the push block 66 to telescopically move.

[0037] In actual application of this embodiment, when the movable rod 71 moves to the end of the upper part of the movable groove 61, the movable rod 71 moves downward and is no longer controlled by the fixed rod 42. Since the lower part of the movable groove 61 is in an inclined state, the movable rod 71 will slowly return to its original position along the lower part of the movable groove 61, so as to facilitate the opening of the slit of the powder bag when the next powder bag passes by. Since the movable rod 71 may not be able to return to its original position after sliding along the lower half of the movable groove 61, the fixed rod 42 at the rear cannot push the movable rod 71. At this time, when the movable rod 71 moves downward from the end of the upper half of the movable groove 61, the telescopic member 65 is extended to allow the push block 66 to push the movable rod 71, thereby giving the movable rod 71 a greater sliding speed so that the movable rod 71 can return to its original position.

[0038] like Figure 3 and Figure 7 As shown, a plurality of baffles 9 are arranged between the two side guard plates 6. The baffles 9 are located at the vertical section of the conveyor belt 4. The heights of the baffles 9 are getting higher and higher in the moving direction of the conveyor belt 4. The baffles 9 are in a stepped shape.

[0039] In actual application of this embodiment, when the powder bag moves to the vertical section of the two conveyor belts 4, most of the powder in the powder bag is discharged, but there is still a small amount of powder that has not been discharged due to the wrinkles of the powder bag and other reasons. At this time, when the powder bag moves, the bottom of the powder bag is blocked by a plurality of baffles 9, so that the powder bag will shake when passing over the baffles 9, and will shake several times when passing through the baffles 9. Moreover, since the baffles 9 are stepped, the shaking frequency of the powder bag becomes higher and higher, so that a small amount of powder in the powder bag is shaken out, so that the powder in the powder bag is discharged cleanly, thereby effectively avoiding the waste of powder.

[0040] A feeding method for a dust-free screening and feeding device for pharmaceutical use, the method is applied to the dust-free screening and feeding device for pharmaceutical use as described above, and the method comprises the following steps: Step S1: placing the powder bags on the horizontal sections of the two conveyor belts 4, hooking the four corners of the powder bags with four hooks 41, and the two conveyor belts 4 convey the powder bags into the feeding box 1. When the powder bags move to the cutting knife 10, the cutting knife 10 cuts the bottom of the powder bags; Step S2: When the bottom of the powder bag is cut and continues to move, the slit at the bottom of the powder bag first contacts the expansion block 11, and the expansion block 11 slowly enters the inside of the powder bag, so that the slit of the powder bag slowly expands, and at the same time cooperates with the expansion mechanism 7 to make the slit continue to expand, and the powder bag slowly moves to the twisted section and the vertical section of the conveyor belt 4, so that the powder bag is bent and the slit at the bottom is expanded, so as to speed up the discharge; Step S3: After the bottom of the powder bag is cut open, the powder bag continues to move, and the powder enters into a plurality of material boxes 51 through the inlet 31. The material boxes 51 are rotated to the outlet 32 ​​by the rotation of the turntable 5, so that the powder is discharged from the outlet 32. At this time, the two movable plates 82 are moved toward or away from each other by the two driving members 81, and the powder falls evenly on the screen 21 under the guidance of the two movable plates 82. Step S4: The vibrating member 22 vibrates the screen 21 to make the screen 21 screen the powder. The screened powder is discharged through the extraction pipe 15. At the same time, the negative pressure mechanism 14 extracts the raised dust.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A dust-free screening and feeding device for pharmaceutical use, comprising a feeding box (1), a discharging cylinder (2), a screen (21), a vibrating member (22), a negative pressure mechanism (14) and a feeding pipe (15), characterized in that: The device also includes: A batching box (3), wherein the batching box (3) is installed in the feeding box (1), and the batching box (3) is located above the screen (21); Conveyor belts (4), two conveyor belts (4) are installed horizontally through the feeding box (1), the conveyor belts (4) are located above the batching box (3), and the two conveyor belts (4) are used to convey bagged powder bags; A turntable (5), wherein a plurality of turntables (5) are installed in the batching box (3), a driving member (33) is installed on the feeding box (1), an output end of the driving member (33) extends into the feeding box (1) and passes through the plurality of turntables (5), a plurality of material boxes (51) are arranged on the periphery of the turntable (5), an inlet (31) and an outlet (32) are respectively opened at the top and the bottom of the batching box (3), and the inlet (31) is located between the two conveyor belts (4); A cutting knife (10), a horizontal plate (34) is provided on the side of the batching box (3) in the opposite direction of movement of the conveyor belt (4), the horizontal plate (34) separates the two conveyor belts (4), and the surface of the horizontal plate (34) is flush with the top of the conveyor belt (4), and a cutting knife (10) is provided on the horizontal plate (34), and the blade of the cutting knife (10) faces in the opposite direction of movement of the conveyor belt (4).

2. The dust-free screening and feeding device for pharmaceutical use according to claim 1, characterized in that: The conveyor belt (4) is divided into a horizontal section, a twisted section and a vertical section. A plurality of hooks (41) are arranged on the conveyor belt (4). The plurality of hooks (41) on the two conveyor belts (4) are symmetrical. Two adjacent groups of hooks (41) are used to hook the four bag corners of the bagged powder bag. The hooks (41) are L-shaped, and the hooks (41) are in a state of being horizontally inclined with respect to the conveyor belt (4). The hooks (41) on the two conveyor belts (4) are both facing the horizontal plate (34).

3. The dust-free screening and feeding device for pharmaceutical use according to claim 2, characterized in that: A feed door (12) is rotatably mounted on one side of the feed box (1), and the horizontal section of the conveyor belt (4) passes through the feed door (12). A discharge box (13) is mounted on the other side of the feed box (1), and the end of the vertical section of the conveyor belt (4) is located in the discharge box (13). A discharge door (131) is rotatably mounted on the discharge box (13).

4. The dust-free screening and feeding device for pharmaceutical use according to claim 2, characterized in that: A dispersion mechanism (8) is installed at the bottom of the batching box (3), and the dispersion mechanism (8) is located above the screen (21). The dispersion mechanism (8) comprises: A second driving member (81), wherein the second driving member (81) is installed on both sides of the feeding box (1); A movable plate (82), wherein the movable plates (82) are provided with two pieces, the output ends of the two sets of driving members (81) are respectively fixedly connected to one side of the two movable plates (82), and the rotation axes of the two movable plates (82) are the same, and the two sets of driving members (81) drive the two movable plates (82) to move toward each other or away from each other; A guide plate (83) is provided at the bottom of the batching box (3), the guide plate (83) is located at the outlet (32), the guide plate (83) is in a herringbone shape and covers the top of the rotating parts of the two movable plates (82).

5. The dust-free screening and feeding device for pharmaceutical use according to claim 1, characterized in that: An expansion block (11) is provided on the horizontal plate (34), the expansion block (11) is located on the side opposite to the blade of the cutting knife (10), the expansion block (11) is symmetrically provided with inclined surfaces on the side facing the cutting knife (10), and the expansion block (11) is wide at the top and narrow at the bottom.

6. The dust-free screening and feeding device for pharmaceutical use according to claim 1, characterized in that: The top of the batching box (3) is symmetrically provided with side guard plates (6), the side guard plates (6) are located on both sides of the inlet (31), and the side guard plates (6) are located on the inner side of the conveyor belt (4), and an opening mechanism (7) is installed between the two side guard plates (6), and the opening mechanism (7) comprises: A movable rod (71), both ends of the movable rod (71) are rotatably mounted with rollers (711), and opposite sides of the two side guard plates (6) are provided with movable grooves (61), the rollers (711) are located in the movable grooves (61), the movable grooves (61) are circular in shape, and the upper half of the movable grooves (61) is in a horizontal state and the lower half is in an inclined state, and a plurality of fixed rods (42) are provided on one side of the conveyor belt (4), and the fixed rods (42) are used to push the movable rod (71) to move along the movable grooves (61); A support rod (73), a fixed plate (72) is fixed on the top of the movable rod (71), a support rod (73) is symmetrically mounted on the top of the fixed plate (72), and the support rod (73) is used to open the powder bag; The movable rod (71) is provided with an extrusion rod (74) symmetrically and movably mounted therein, and the fixed plate (72) is provided with a push rod (75) movably mounted therein. A wedge block (751) is provided at the bottom of the push rod (75), and the wedge block (751) passes through the fixed plate (72) and the movable rod (71). One end of the extrusion rod (74) abuts against the inclined surface of the wedge block (751), and the top of the push rod (75) is provided with a connecting rod. A connecting rod (752), the two ends of the connecting rod (752) are respectively slidably connected to the two support rods (73), the upper half of the movable groove (61) is provided with a fixing strip (63), one end of the extrusion rod (74) passes through the roller (711), when the movable rod (71) moves, the extrusion rod (74) is squeezed into the movable rod (71) by the fixing strip (63), and an elastic member (76) is installed between the push rod (75) and the inner cavity of the fixing plate (72); A fixed frame (77) and a guide block (78), wherein the bottom of the movable rod (71) is symmetrically provided with a fixed frame (77), a guide groove (62) is provided on the side guard plate (6), the guide block (78) is movably installed in the guide groove (62), and the guide block (78) passes through the fixed frame (77).

7. The dust-free screening and feeding device for pharmaceutical use according to claim 6, characterized in that: The side guard plate (6) is provided with a mounting groove (64), a telescopic member (65) is mounted in the mounting groove (64), a push block (66) is arranged at the output end of the telescopic member (65), a surface of the push block (66) is connected to the movable groove (61), and the push block (66) faces the lower half of the movable groove (61).

8. The dust-free screening and feeding device for pharmaceutical use according to claim 6, characterized in that: A plurality of baffles (9) are arranged between the two side guard plates (6), the baffles (9) being located at the vertical section of the conveyor belt (4), and the heights of the baffles (9) gradually increase in the moving direction of the conveyor belt (4), and the baffles (9) are in a stepped shape.

9. A feeding method for a dust-free screening and feeding device for pharmaceutical use, the method being applied to the dust-free screening and feeding device for pharmaceutical use as claimed in any one of claims 1 to 8, the method comprising the following steps: Step S1: placing the powder bags on the horizontal sections of the two conveyor belts (4), hooking the four corners of the powder bags with four hooks (41), and the two conveyor belts (4) convey the powder bags into the feeding box (1). When the powder bags move to the cutting knife (10), the cutting knife (10) cuts the bottom of the powder bags; Step S2: When the bottom of the powder bag is cut and continues to move, the slit at the bottom of the powder bag first contacts the expansion block (11), and the expansion block (11) slowly enters the interior of the powder bag, so that the slit of the powder bag slowly expands, and at the same time cooperates with the expansion mechanism (7) to make the slit continue to expand, and the powder bag slowly moves to the twisted section and the vertical section of the conveyor belt (4), so that the powder bag is bent and the slit at the bottom is expanded, thereby accelerating the discharge of materials; Step S3: After the bottom of the powder bag is cut open, the powder bag continues to move, and the powder enters into a plurality of material boxes (51) through the inlet (31). The material boxes (51) are rotated to the outlet (32) by the rotation of the turntable (5), so that the powder is discharged from the outlet (32). At this time, the two movable plates (82) are moved toward or away from each other by the two driving members (81), and the powder falls evenly on the screen (21) under the guidance of the two movable plates (82); Step S4: The vibrating member (22) vibrates the screen (21), causing the screen (21) to screen the powder. The screened powder is discharged through the extraction pipe (15), and the raised dust is simultaneously extracted by the negative pressure mechanism (14).

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