Fluidized bed equipment capable of uniformly distributing airflow

Abstract

The utility model relates to fluidized bed equipment capable of uniformly distributing airflow, which is characterized in that a rotatable shunting disc is arranged in a mixing chamber of a fluidized bed and is rotationally connected with the inner wall of the mixing chamber through a clamping block; a plurality of spiral air injection groups are uniformly arranged on the shunting disc, the starting points of the plurality of spiral air injection groups are positioned at the circle center of the shunting disc, and the end points extend towards the edge of the shunting disc; each spiral line air injection set comprises an air inlet branch pipe extending in a spiral line mode, a plurality of air outlet pipes are arranged on the air inlet branch pipes, and nozzles are installed at the ends of the air outlet pipes. The shunting disc can rotate in the mixing chamber, and the plurality of groups of nozzles distributed in the Fibonacci spiral line shape are arranged on the surface of the shunting disc, so that airflow jetted by the shunting disc is rotary, dispersed and uniform, a fixed airflow jet area does not exist, the motion trail of medicine particles is more complex, caking is difficult to form, and the medicine particles are uniformly distributed. The dispersion effect of the fluidized bed is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of fluidized beds for pharmaceutical dispersion granulation, in particular to a fluidized bed device with uniform air flow distribution. Background Art

[0002] In the process of pharmaceutical production, fluidized beds are usually used to mix drugs and excipients evenly, which is beneficial to the subsequent granulation process. In the fluidized bed, gas is sprayed upward from the bottom to disperse the drugs and excipients. If the gas spraying is uneven, caking is likely to occur. Currently, most of the gas spraying discs used in fluidized beds are fixed, and the nozzles on the spraying disc are mostly arranged in a ring. Multiple nozzles are installed on the same air duct. However, the gas tends to leave from the nearest outlet. Therefore, there will be a phenomenon that the air flow pressure is high in some areas of the spraying disc and low in some areas, resulting in uneven air flow distribution. Secondly, a fixed air flow spraying area will be formed in the area with high air flow pressure, and the drug particles tend to be dispersed in the non-air flow spraying area. Thus, the movement trajectories of the drug particles are mostly similar, making the drug dispersion uneven and prone to caking. Summary of the Utility Model

[0003] The purpose of this application is to provide a fluidized bed device with uniform air flow distribution, aiming to solve the problems existing in the prior art.

[0004] The embodiment of this application provides a fluidized bed device with uniform air flow distribution. A rotatable flow splitting disc is installed inside the mixing chamber of the fluidized bed. The flow splitting disc is rotationally connected to the inner wall of the mixing chamber through a clamping block; a plurality of spiral air jet groups are evenly arranged on the flow splitting disc. The starting points of the plurality of spiral air jet groups are all located at the center of the flow splitting disc, and the endpoints extend towards the edge of the flow splitting disc; each spiral air jet group includes an intake branch pipe extending in a spiral line. A plurality of outlet pipes are arranged on the intake branch pipe, and nozzles are installed at the ends of the outlet pipes; the outlet pipes and the nozzles are densely distributed near the starting point of the spiral line and sparsely distributed near the end of the spiral line;

[0005] An intake main pipe is arranged at the central axis of the flow splitting disc. The intake branch pipe in each spiral air jet group is communicated with the intake main pipe; the intake main pipe extends out from the lower end of the flow splitting disc and is rotationally connected to a charging pipe;

[0006] A shallow groove is formed on the lower end surface of the flow splitting disc. Teeth are arranged on the inner wall of the shallow groove. A driving gear is connected to the shallow groove through tooth engagement. The driving gear is in transmission connection with a motor.

[0007] Further, the extending curve of the intake branch pipe is a Fibonacci spiral.

[0008] Further, an outer sleeve pipe is sleeved outside the intake main pipe. The outer sleeve pipe is fixedly connected to the flow splitting disc; a chassis is arranged below the driving gear. The chassis is rotationally connected to the outer sleeve pipe and is relatively fixed to the clamping block.

[0009] Furthermore, ball bearings are provided between the edge of the flow dividing plate and the clamping block. Accommodating grooves are respectively formed in the clamping block and the flow dividing plate corresponding to the ball bearings, and the flow dividing plate is movably connected to the clamping block through the ball bearings.

[0010] Furthermore, there are two driving gears, which are symmetrical about the intake main pipe. Motors are connected to the shafts of both driving gears.

[0011] The beneficial effects of the present utility model are as follows: the flow dividing plate of the present utility model can rotate in the mixing chamber, and multiple groups of nozzles distributed in the shape of Fibonacci spiral lines are arranged on the surface of the flow dividing plate. Therefore, the airflow ejected by the flow dividing plate is rotating, dispersed, uniform and there is no fixed airflow ejection area. Thus, the movement trajectory of the pharmaceutical particles is more complex and it is difficult to form agglomerates, thereby enhancing the dispersion effect of the fluidized bed. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the overall structure of the flow dividing plate.

[0013] Figure 2 It is a schematic diagram of the top surface structure of the flow dividing plate.

[0014] Figure 3 It is a schematic diagram of the internal sectional structure of the flow dividing plate.

[0015] Figure 4 It is a schematic diagram of the bottom surface structure of the flow dividing plate.

[0016] In the figure:

[0017] 1, flow dividing plate; 2, clamping block; 3, spiral air jet group; 4, intake branch pipe; 5, outlet pipe; 6, nozzle; 7, intake main pipe; 8, rotary joint; 9, charging pipe; 10, shallow groove; 11, tooth; 12, driving gear; 13, motor; 14, outer sleeve; 15, chassis; 16, ball bearing; 17, accommodating groove. Detailed Embodiments

[0018] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0019] A fluidized bed device with uniform air flow distribution, in which a rotatable flow dividing plate 1 is installed inside the mixing chamber of the fluidized bed. The flow dividing plate 1 is rotationally connected to the inner wall of the mixing chamber through a clamping block 2, as shown in Figure 1 and Figure 2As shown, multiple spiral jet groups 3 are evenly arranged on the diverter plate 1, and the starting points of the multiple spiral jet groups 3 are all located at the center of the diverter plate 1, and the end points extend toward the edge of the diverter plate 1 in the form of Fibonacci spirals. In this embodiment, there are six spiral jet groups 3, and other numbers may also be used.

[0020] like Figure 3 As shown, each spiral jet group 3 includes an air inlet branch pipe 4 extending in the shape of a Fibonacci spiral, the air inlet branch pipe 4 is located inside the diverter plate 1, and a plurality of air outlet pipes 5 are arranged on the air inlet branch pipe 4, and a nozzle 6 is installed at the end of the air outlet pipe 5, and the nozzle 6 is located on the upper surface of the diverter plate 1. The air outlet pipe 5 and the nozzle 6 are located at the end and midpoint of each line segment of the Fibonacci spiral, so that the air outlet pipe 5 and the nozzle 6 are densely distributed near the starting point of the spiral and sparsely distributed near the tail end of the spiral. In conjunction with the rotating diverter plate 1, the gas ejected from the diverter plate 1 is in the shape of a Fibonacci spiral, so that the airflow can be fully dispersed in the mixing chamber.

[0021] An air intake pipe 7 is arranged at the center axis of the flow distribution plate 1, and the air intake pipe 4 in each spiral jet group 3 is connected to the air intake pipe 7; the air intake pipe 7 extends from the lower end of the flow distribution plate 1 and is rotatably connected to the inflation pipe 9 through a rotary joint 8. The inflation pipe 9 is connected to an external air pump for inflating the air intake pipe 7.

[0022] like Figure 4 As shown, a shallow groove 10 is provided on the lower end surface of the diverter plate 1, and teeth 11 are provided on the inner wall of the shallow groove 10. A driving gear 12 is meshed and connected in the shallow groove 10 through the teeth 11, and the driving gear 12 is transmission-connected to a motor 13. The driving gear 12 is driven to rotate by the motor 13, and the diverter plate 1 is driven to rotate through meshing. The direction of rotation is the same as the direction of the Fibonacci spiral.

[0023] An outer sleeve 14 is sleeved on the outside of the air intake main pipe 7, and the outer sleeve 14 is fixedly connected to the diverter plate 1; a chassis 15 is arranged below the driving gear 12, and the chassis 15 limits the driving gear 12 to ensure the meshing relationship between the driving gear 12 and the diverter plate 1. The chassis 15 is rotatably connected to the outer sleeve 14, and the chassis 15 is relatively fixed to the clamping block 2.

[0024] The clamp block 2 can be Figure 1 The two block-shaped individuals are shown, and they can also be annular and embedded on the edge of the diverter plate 1. Specifically, a ball 16 is provided between the edge of the diverter plate 1 and the clamping block 2, and a receiving groove 17 is provided on the clamping block 2 and the diverter plate 1 corresponding to the ball 16. The diverter plate 1 is movably connected to the clamping block 2 through the ball 16. The clamping block 2 is fixed on the inner wall of the mixing chamber, and the diverter plate 1 can rotate relative to the clamping block 2 through the ball 16, and the clamping block 2 can ensure the smooth rotation of the diverter plate 1.

[0025] In this embodiment, there are two driving gears 12. The two driving gears 12 are symmetrical about the intake main pipe 7, and the shaft parts of the two driving gears 12 are both connected with motors 13. One of the motors is the main motor, and the other is the recording motor. When the diverter disc 1 rotates, the two driving gears 12 rotate in the same way. Therefore, the recording motor can record the actions of the main motor. When the main motor is at rest, the recording motor can repeat the actions of the main motor.

[0026] During use, the diverter disc 1 rotates driven by the motor, and the gas in the shape of a Fibonacci spiral is ejected through the nozzles 6 distributed along the Fibonacci spiral. The shape characteristics of the spiral are used to make the gas diverge, thereby enhancing the uniform distribution of the air flow in the fluidized bed.

[0027] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting.

Claims

1. A fluidized bed device with uniform air flow distribution, characterized in that A rotatable flow divider is installed inside the mixing chamber of the fluidized bed, and the flow divider is rotatably connected to the inner wall of the mixing chamber through a clamping block; a plurality of spiral jet groups are evenly arranged on the flow divider, and the starting points of the plurality of spiral jet groups are all located at the center of the flow divider, and the end points extend to the edge of the flow divider; each spiral jet group includes an air inlet branch extending in a spiral, and a plurality of air outlet pipes are arranged on the air inlet branch pipe, and a nozzle is installed at the end of the air outlet pipe; the air outlet pipes and nozzles are densely distributed near the starting point of the spiral, and are sparsely distributed near the tail end of the spiral; An air intake main pipe is arranged at the center axis of the diverter plate, and each air intake branch pipe in each spiral jet group is connected to the air intake main pipe; the air intake main pipe extends from the lower end of the diverter plate and is rotatably connected to the inflation pipe; A shallow groove is provided on the lower end surface of the diverter plate, teeth are provided on the inner wall of the shallow groove, a driving gear is meshed with the teeth and is connected to the shallow groove through transmission connection with the motor.

2. The fluidized bed device with uniform air flow distribution according to claim 1, characterized in that The extension curve of the air intake branch pipe is a Fibonacci spiral.

3. The fluidized bed device with uniform air flow distribution according to claim 2, characterized in that, An outer sleeve is sleeved on the outside of the air intake main pipe, and the outer sleeve is fixedly connected to the diverter plate; a chassis is arranged below the driving gear, the chassis is rotatably connected to the outer sleeve, and the chassis is relatively fixed to the clamping block.

4. The fluidized bed equipment with uniform air flow distribution according to claim 3, characterized in that A ball bearing is arranged between the edge of the diverter plate and the clamping block, and a receiving groove is provided on the clamping block and the diverter plate corresponding to the ball bearing. The diverter plate is movably connected to the clamping block through the ball bearing.

5. The fluidized bed device with uniform air flow distribution according to claim 1 or 4, characterized in that, There are two driving gears, which are symmetrical with the air intake main pipe as the axis, and the shafts of the two driving gears are both connected with motors.

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