An intermittent quantitative blanking device and control method thereof

Abstract

The present application discloses an intermittent quantitative blanking device and a control method thereof, including a sheet metal silo module, a quantitative blanking control mechanism, and a blanking pipe. The sheet metal silo module includes a transition cone storage bin and a blanking bin connected to the lower part of the transition cone storage bin. A blanking pipe is installed at the lower part of the blanking bin, and the blanking bin is connected to one end of the quantitative blanking control mechanism. A material level sensor is also arranged on the outside of the blanking pipe, and the material level sensor is electrically connected to an intelligent control module, and the intelligent control module is electrically connected to the quantitative blanking control mechanism. The present application controls the quantitative alternating filling and blanking work through the quantitative blanking control mechanism, and the material is appropriate and there is no extrusion. Every time it is lower than the control material level baseline, there is a material level sensor signal output to automatically control the completion of each blanking action to replenish the material level, which is not affected by the filling speed, and ensures that the quantitative material is supplied to the feeder, so as to achieve the consistency of parameters such as material dosage, density, and fluidity.

Description

Technical Field

[0001] The present application relates to the technical field of pharmaceutical machinery and equipment, and in particular to an intermittent quantitative feeding device and a control method thereof. Background Art

[0002] Medium and large-scale high-speed rotary tablet presses are mainly used for tablet processing in the pharmaceutical industry to press granular or powdered media into round, special-shaped tablets or tablets with text, symbols or graphics. They are key equipment suitable for batch production. The tablet press workflow includes feeding, quantitative filling, pre-pressing, main pressing and tablet discharging. In recent years, the demand for the promotion and application of high-speed tablet presses has been stable, and the performance and quality requirements of high-speed tablet presses have become increasingly higher. High-speed tablet presses are required to not only meet the requirements of tablet weight, tablet hardness (axial hardness and radial hardness), and tablet dimensions (height and radial dimensions), but also have a high degree of automation and high production capacity. The feeding link of the tablet press workflow needs to be more scientific, and the parameters such as material dosage, density, and fluidity need to be optimized. The traditional feeding link is to dock the large barrel above the feeder, and the material is full and fully filled. The material density and fluidity are inconsistent during the blanking process. Some types of materials and some situations will have large differences in material density and fluidity, which will lead to unqualified tablet weight or tablet hardness or tablet dimensions in the tablet production. Summary of the invention

[0003] The embodiment of the present application provides an intermittent quantitative blanking device and a control method thereof, which greatly improves the consistency of parameters such as material dosage, density, and fluidity in the feeding link, and solves the problem of inconsistent material density and fluidity during the blanking process caused by a large amount of dense material in a large barrel.

[0004] An embodiment of the present application provides an intermittent quantitative blanking device, including a sheet metal silo module, a quantitative blanking control mechanism, and a blanking pipe. The sheet metal silo module includes a transition cone storage silo and a blanking silo connected to the lower part of the transition cone storage silo. The blanking silo is connected to one end of the quantitative blanking control mechanism. A blanking pipe is installed at the lower part of the blanking silo. A material level sensor is also arranged on the outer side of the blanking pipe. The material level sensor is electrically connected to the intelligent control module, and the intelligent control module is electrically connected to the quantitative blanking control mechanism.

[0005] Preferably, the upper portion of the transition cone storage bin is connected to a feeding mechanism via a flange, and the lower end of the discharge pipe is connected to an equipment feeder via a docking port.

[0006] Preferably, the quantitative feeding control mechanism includes a double-axis cylinder, a cylinder transmission shaft, a blocking plate, a connecting block, a cylinder fixing frame, a connecting shaft, a push plate, and a baffle. The cylinder fixing frame is welded together with the connecting block, and the double-axis cylinder is installed on the cylinder fixing frame. The connecting shaft runs through the connecting block. The connecting shaft is located on one side of the connecting block and is connected to the cylinder transmission shaft. The connecting shaft is located on the other side of the connecting block and three push plates are installed in sequence. Baffles are respectively arranged on both sides of the push plate, and a blocking plate is arranged at the bottom of the push plate.

[0007] Preferably, the blocking plate, three pushing plates and the baffle are all located in the material drop bin, and the blocking plate is fixedly installed directly below the discharge port of the transition cone storage bin; when the dual-axis cylinder drives the connecting shaft to move, the first gap and the second gap between the three pushing plates respectively take turns with the blocking plate and the baffle to form a quantitative storage bin.

[0008] Preferably, the lower part of the material discharge bin is connected to the material discharge pipe through a docking piece.

[0009] Preferably, the material level sensor is arranged at the lower part of the feeding pipe.

[0010] Preferably, the intelligent control module includes a PLC controller and a solenoid valve, the material level sensor is electrically connected to the PLC controller, the PLC controller is electrically connected to the solenoid valve, and the solenoid valve is electrically connected to the dual-axis cylinder.

[0011] Preferably, the material level sensor is a capacitive proximity switch.

[0012] The present application also provides a control method for an intermittent quantitative blanking device, comprising:

[0013] When the material is lower than the position of the material level sensor, the PLC controller of the intelligent control module controls the solenoid valve to issue an action command, the solenoid valve opens, the double-axis cylinder moves, and the cylinder drive shaft drives the connecting shaft to reciprocate to achieve alternating filling and blanking work, specifically:

[0014] When the cylinder drive shaft is extended, the second gap between the two pusher plates away from the connection block is separated from the blocking plate and the material discharge work begins, and the first gap between the two pusher plates close to the connection block forms a quantitative storage bin with the blocking plate and the filling work begins;

[0015] When the cylinder drive shaft is retracted, the first gap between the two pusher plates close to the connection block is separated from the blocking plate to start the material discharge work, and the second gap between the two pusher plates away from the connection block forms a quantitative storage bin with the blocking plate to start the filling work;

[0016] When the material is higher than the level sensor after feeding, the intelligent control module controls the solenoid valve to issue a closing command, closes the solenoid valve, stops the dual-axis cylinder from working, and then stops the filling and blanking work.

[0017] Preferably, the intelligent control module controls the blanking speed by controlling the action frequency of the dual-axis cylinder.

[0018] At least one of the above technical solutions adopted in the embodiments of the present application can achieve the following beneficial effects:

[0019] 1. This application uses a quantitative feeding control mechanism to control the quantitative alternating filling and blanking work, with the right amount of material and no squeezing. Every time it is lower than the control material level baseline, the material level sensor signal output automatically controls each blanking action to replenish the material level, which is not affected by the filling speed, ensuring the quantitative material supply to the feeder and achieving consistency in material dosage, density, fluidity and other parameters.

[0020] 2. The quantitative feeding control mechanism of the present application is realized by only one double-axis cylinder, which has a simple structure, is easy to disassemble and maintain, and is controlled by a PLC controller, which is easy to operate and has high control accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall external structure of the intermittent quantitative blanking device of the present application;

[0023] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the intermittent quantitative blanking device of the present application;

[0024] Figure 3 This is a schematic diagram of the upper functional main structure of the intermittent quantitative blanking device of the present application;

[0025] Figure 4 This is a structural schematic diagram of the intermittent quantitative blanking device of the present application, in which the cylinder drive shaft is in an extended state;

[0026] Figure 5 This is a schematic structural diagram of the cylinder drive shaft of the intermittent quantitative blanking device of the present application in a retracted state;

[0027] Figure 6 This is a schematic diagram of the front view structure of the quantitative material discharge control mechanism of the intermittent quantitative material discharge device of the present application;

[0028] Figure 7This is a schematic cross-sectional structure diagram of a quantitative material discharge control mechanism of an intermittent quantitative material discharge device of the present application;

[0029] Figure 8 This is a schematic diagram of the top view of the quantitative material discharge control mechanism of the intermittent quantitative material discharge device of the present application;

[0030] Fig. 9 It is a schematic diagram of the three-dimensional structure of the quantitative material discharge control mechanism of the intermittent quantitative material discharge device of the present application. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0032] The technical solutions provided by various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0033] Example 1

[0034] like Figure 1 , 2 As shown, an intermittent quantitative material discharge device includes a sheet metal silo module, a quantitative material discharge control mechanism 4, and a discharge pipe 5. The sheet metal silo module includes a transition cone storage silo 2 and a discharge silo 3 connected to the lower part of the transition cone storage silo 2. The discharge silo 3 is connected to one end of the quantitative material discharge control mechanism 4. The lower part of the discharge silo 3 is connected to the discharge pipe 5 through a docking piece 11. A material level sensor 6 is also arranged on the outer side of the discharge pipe 5, specifically, the material level sensor 6 is arranged at the lower part of the discharge pipe 5. Among them, the upper part of the transition cone storage silo 2 is connected to the feeding mechanism through a flange 1, and the lower end of the discharge pipe 5 is connected to the equipment feeder through a docking port 7. In the figure, component 8 represents the material.

[0035] Figure 1 , 2In the figure, the transition cone storage bin 2 is a closed cavity formed by welding of stainless steel plates, which is used for connection with the feeding device of the tablet press and storage of materials. The drop bin 3 is a closed cavity formed by welding of stainless steel plates, which is used for connection with the tablet press feeder 5 and transportation of materials; the other end of the tablet press feeder 5 is sealed and connected to the equipment feeder. The material level sensor 6 is electrically connected to the intelligent control module, and the intelligent control module is electrically connected to the quantitative feeding control mechanism 4. Among them, the intelligent control module includes a PLC controller and a solenoid valve, the material level sensor 6 is electrically connected to the PLC controller, the PLC controller is electrically connected to the solenoid valve, and the solenoid valve is electrically connected to the dual-axis cylinder 41. The material level sensor 6 described in this embodiment is a capacitive proximity switch.

[0036] like Figure 6 , 7 As shown in Figures 8 and 9, the quantitative feeding control mechanism 4 includes a double-axis cylinder 41, a cylinder transmission shaft 42, a blocking plate 43, a connecting block 44, a cylinder fixing frame 45, a connecting shaft 46, a pushing plate 49, and a baffle 410. The cylinder fixing frame 45 and the connecting block 44 are welded together, and the double-axis cylinder 41 is mounted on the cylinder fixing frame 45. The connecting shaft 46 runs through the connecting block 44. The connecting shaft 46 is located on one side of the connecting block 44 and is connected to the cylinder transmission shaft 42. The connecting shaft 46 is located on the other side of the connecting block 44. Three pushing plates 49 are installed in sequence at intervals. Baffles 410 are respectively arranged on both sides of the pushing plate 49, and a blocking plate 43 is arranged at the lower part of the pushing plate 49. Among them, the blocking plate 43, three pushing plates 49, and the baffle plate 410 are all located in the material drop bin 3, and the blocking plate 43 is fixedly installed directly below the discharge port of the transition cone storage bin 2; when the dual-axis cylinder 41 drives the connecting shaft 46 to move, the first gap 47 and the second gap 48 between the three pushing plates 49 respectively take turns with the blocking plate 43 and the baffle plate 410 to form a quantitative storage bin 9.

[0037] Figure 6 , 7 The double-axis cylinder 41 in 8 and 9 is a purchased standard part, which is installed on the cylinder fixing frame 45. The cylinder fixing frame 45 is welded to the connecting block 44 as a whole. The double-axis cylinder 41 controls the air flow of the cylinder through the solenoid valve controlled by the tablet press PLC to realize the reciprocating motion of the cylinder. The first gap 47 and the second gap 48 are cavities formed by welding three push plates and the connecting shaft, which are used to temporarily store the materials that need to fall each time the cylinder moves. The connecting block 44 is made of stainless steel and is used for welding and fixing the cylinder fixing frame 45 and guiding and fixing the connecting shaft 46. The cylinder drive shaft 42 of the double-axis cylinder 41 is connected to the connecting shaft 46 through a purchased standard coupling, so as to realize the reciprocating motion of the double-axis cylinder 41 and drive the cycle of the filling and blanking action.

[0038] The traditional large barrel structure has the characteristics of large and dense materials. When some types of materials are large and dense, they are easily affected by changes in ambient temperature and filling speed, which may cause changes in material density and fluidity. The corresponding tablet weight, tablet hardness and tablet size of the tablet produced by this type of material will be unqualified.

[0039] The intermittent quantitative blanking mechanism of this embodiment is divided into a sheet metal silo module and a quantitative blanking control mechanism. The sheet metal silo module stores materials and forms a material blanking channel. The quantitative blanking control mechanism automatically controls each blanking action to replenish the material level according to the received material level sensor signal. At the same time, the original eccentric large barrel is changed to a small diameter straight-through structure, and a material level sensor is installed. The amount of material discharged each time by the intermittent quantitative blanking mechanism is fixed, ensuring that the material in the barrel can meet the production needs and there is no material extrusion. Therefore, the intermittent quantitative blanking mechanism has the advantages of not too much material, and it is not full and there is no extrusion. Every time the material in the barrel is lower than the position of the material level sensor, a sensor signal is output to automatically control each blanking action to replenish the material level, so it is not affected by the filling speed, ensuring that the quantitative material is supplied to the feeder, and achieving consistency in parameters such as material dosage, density, and fluidity.

[0040] like Figure 4 , 5 As shown, the telescopic action of the cylinder realizes the principle of the filling and blanking process: when the cylinder drive shaft 42 is extended, the second gap 48 between the two push plates 49 away from the connecting block 44 is separated from the blocking plate 43 and the discharge work starts, and the first gap 47 between the two push plates 49 close to the connecting block 44 forms a quantitative storage bin 9 with the blocking plate 43 and the filling work starts; when the cylinder drive shaft 42 is retracted, the first gap 47 between the two push plates 49 close to the connecting block 44 is separated from the blocking plate 43 and the discharge work starts, and the second gap 48 between the two push plates 49 away from the connecting block 44 forms a quantitative storage bin 9 with the blocking plate 43 and the filling work starts; the alternating filling and blanking of the storage bin 1 and the storage bin 2 are realized by the reciprocating motion of the double-axis cylinder.

[0041] At the same time, the packing space of the quantitative storage bin 9 formed by the first gap 47 and the second gap 48 is fixed, that is, the material added by the cylinder each time is fixed; the amount of material consumed in the standard time under different tablet types and different production capacity states of the tablet press is different, and the material supply can be met by controlling the action time interval of the double-axis cylinder to ensure the consistency of parameters such as material dosage, density, and fluidity in the equipment feeding device. When the tablet press is working normally, when the material is lower than the position of the material level sensor, the equipment PLC sends an action command to the solenoid valve that controls the air flow of the cylinder, the solenoid valve opens, and the double-axis cylinder performs reciprocating action to complete the feeding work. After feeding, the material is higher than the position of the material level sensor, and the equipment PLC sends an action stop command to the solenoid valve that controls the air flow of the cylinder, closes the solenoid valve, and the double-axis cylinder stops working. The amount of material added each time in this structure blanking system is fixed and variable, and the feeding time interval can be automatically adjusted according to the material consumption of the tablet press.

[0042] Example 2

[0043] The present invention also provides a control method for an intermittent quantitative blanking device, comprising:

[0044] When the material is lower than the position of the material level sensor 6, the PLC controller of the intelligent control module controls the solenoid valve to issue an action command, the solenoid valve opens, the double-axis cylinder 41 moves, and the cylinder drive shaft 42 drives the connecting shaft 46 to reciprocate to achieve alternating filling and blanking operations, specifically:

[0045] When the cylinder drive shaft 42 is extended, the second gap 48 between the two pusher plates 49 away from the connection block 44 is separated from the blocking plate 43 to start the material discharge operation, and the first gap 47 between the two pusher plates 49 close to the connection block 44 forms a quantitative storage bin 9 with the blocking plate 43 to start the filling operation;

[0046] When the cylinder drive shaft 42 is retracted, the first gap 47 between the two pusher plates 49 close to the connection block 44 is separated from the blocking plate 43 to start the material discharge operation, and the second gap 48 between the two pusher plates 49 away from the connection block 44 forms a quantitative storage bin 9 with the blocking plate 43 to start the filling operation;

[0047] When the material is higher than the position of the material level sensor 6 after feeding, the intelligent control module controls the solenoid valve to issue a closing command, closes the solenoid valve, and the dual-axis cylinder 41 stops working, thereby stopping the filling and blanking work.

[0048] At the same time, the intelligent control module controls the blanking speed by controlling the action frequency of the dual-axis cylinder 41 .

[0049] The intermittent quantitative blanking mechanism of this embodiment is divided into a sheet metal silo module and a quantitative blanking control mechanism. The sheet metal silo module stores materials and forms a material blanking channel. The quantitative blanking control mechanism automatically controls each blanking action to replenish the material level according to the received material level sensor signal. At the same time, the original eccentric large barrel is changed to a small diameter straight-through structure, and a material level sensor is installed. The amount of material discharged each time by the intermittent quantitative blanking mechanism is fixed, ensuring that the material in the barrel can meet the production needs and there is no material extrusion. Therefore, the intermittent quantitative blanking mechanism has the advantages of not too much material, and it is not full and there is no extrusion. Every time the material in the barrel is lower than the position of the material level sensor, a sensor signal is output to automatically control each blanking action to replenish the material level, so it is not affected by the filling speed, ensuring that the quantitative material is supplied to the feeder, and achieving consistency in parameters such as material dosage, density, and fluidity.

[0050] At the same time, the packing space of the quantitative storage bin 9 formed by the first gap 47 and the second gap 48 is fixed, that is, the material added by each action of the cylinder is fixed. The amount of material consumed in the standard time under different tablet types and different production capacity states of the tablet press is different. The material supply can be met by controlling the action time interval of the double-axis cylinder to ensure the consistency of parameters such as material dosage, density, and fluidity in the equipment feeding device.

[0051] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. An intermittent quantitative blanking device, characterized in that: It comprises a sheet metal silo module, a quantitative material discharge control mechanism (4), and a discharge pipe (5), wherein the sheet metal silo module comprises a transition cone storage silo (2) and a discharge silo (3) connected to the lower part of the transition cone storage silo (2), wherein the discharge silo (3) is connected to one end of the quantitative material discharge control mechanism (4), a discharge pipe (5) is installed at the lower part of the discharge silo (3), and a material level sensor (6) is also arranged on the outer side of the discharge pipe (5), wherein the material level sensor (6) is electrically connected to the intelligent control module, and the intelligent control module is electrically connected to the quantitative material discharge control mechanism (4); The quantitative feeding control mechanism (4) comprises a double-axis cylinder (41), a cylinder transmission shaft (42), a blocking plate (43), a connecting block (44), a cylinder fixing frame (45), a connecting shaft (46), a push plate (49), and a baffle (410); the cylinder fixing frame (45) and the connecting block (44) are welded together; the double-axis cylinder (41) is mounted on the cylinder fixing frame (45); the connecting shaft (46) runs through the connecting block (44); the connecting shaft (46) is located on one side of the connecting block (44) and connected to the cylinder transmission shaft (42); the connecting shaft (46) is located on the other side of the connecting block (44) and three push plates (49) are installed in sequence at intervals; baffles (410) are respectively arranged on both sides of the push plate (49); and a blocking plate (43) is arranged at the bottom of the push plate (49); The blocking plate (43), three pushing plates (49) and the baffle plate (410) are all located in the material drop bin (3), and the blocking plate (43) is fixedly installed just below the material discharge port of the transition cone storage bin (2); when the double-axis cylinder (41) drives the connecting shaft (46) to move, the first gap (47) and the second gap (48) between the three pushing plates (49) respectively take turns with the blocking plate (43) and the baffle plate (410) to form a quantitative material storage bin (9); The intelligent control module comprises a PLC controller and a solenoid valve, the material level sensor (6) is electrically connected to the PLC controller, the PLC controller is electrically connected to the solenoid valve, and the solenoid valve is electrically connected to the dual-axis cylinder (41).

2. An intermittent quantitative feeding device according to claim 1, characterized in that: The upper part of the transition cone storage bin (2) is connected to the feeding mechanism via a flange (1), and the lower end of the discharge pipe (5) is connected to the equipment feeder via a docking port (7).

3. The intermittent quantitative feeding device according to claim 1, characterized in that: The lower part of the material drop bin (3) is connected to the material drop pipe (5) via a docking piece (11).

4. The intermittent quantitative feeding device according to claim 1, characterized in that: The material level sensor (6) is arranged at the lower part of the feeding pipe (5).

5. An intermittent quantitative feeding device according to claim 4, characterized in that: The material level sensor (6) is a capacitive proximity switch.

6. A control method for an intermittent quantitative feeding device as claimed in any one of claims 1 to 5, characterized in that: include: When the material is lower than the position of the material level sensor (6), the PLC controller of the intelligent control module controls the solenoid valve to issue an action command, the solenoid valve opens, the double-axis cylinder (41) is actuated, and the cylinder drive shaft (42) drives the connecting shaft (46) to reciprocate to achieve alternating filling and blanking operations, specifically: When the cylinder drive shaft (42) is extended, the second gap (48) between the two push plates (49) away from the connection block (44) is separated from the blocking plate (43) to start the material discharge operation, and the first gap (47) between the two push plates (49) close to the connection block (44) forms a quantitative storage bin (9) with the blocking plate (43) to start the filling operation; When the cylinder drive shaft (42) is retracted, the first gap (47) between the two push plates (49) close to the connection block (44) is separated from the blocking plate (43) to start the material discharge operation, and the second gap (48) between the two push plates (49) away from the connection block (44) forms a quantitative storage bin (9) with the blocking plate (43) to start the filling operation; When the material is higher than the position of the material level sensor (6) after feeding, the PLC controller of the intelligent control module controls the solenoid valve to issue a closing command, closes the solenoid valve, and the double-axis cylinder (41) stops working, thereby stopping the filling and blanking work.

7. The control method of the intermittent quantitative feeding device according to claim 6, characterized in that: The intelligent control module controls the material dropping speed by controlling the action frequency of the double-axis cylinder (41).

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