Ultrasonic rotary vibration sieve for pharmaceutic adjuvants

Abstract

A plurality of screening barrels are arranged on a vibrating screen body, a dustproof cover is movably connected to the top end of the uppermost screening barrel, and a feeding port is fixedly formed in the upper end of the dustproof cover; the inner walls of the screening barrels are connected with ultrasonic screens, the side wall of each screening barrel is provided with a discharging hole communicated with the discharging pipe, the inner side wall of each screening barrel is provided with a material blocking plate for blocking the corresponding discharging hole, and the material blocking plates are communicated with an operating rod penetrating through the side wall of the corresponding screening barrel; the bottom of the ultrasonic screen is connected with an anti-static grounding wire, and the other end of the grounding wire is grounded. An annular blowing pipe with a blowing through hole is arranged on the side wall of the dustproof cover, and the center line of the blowing through hole inclines downwards and faces the center of the surface of the ultrasonic screen. According to the ultrasonic spin-vibration screen for the pharmaceutic adjuvants, the grounding wire is installed at the bottom of the ultrasonic screen, airflow blown out by the air blowing annular pipe eliminates the electrostatic interaction between materials, the materials are dispersed, the screen is prevented from being blocked, and the screening efficiency and precision are improved in combination with the ultrasonic vibration screen.

Description

Technical Field

[0001] The utility model relates to the technical field of pharmaceutical excipient processing, in particular to an ultrasonic rotary vibration screen for pharmaceutical excipients. Background Art

[0002] Pharmaceutical excipients refer to excipients and additives used in the production of drugs and preparation of prescriptions. They are substances other than active ingredients that have been reasonably evaluated for safety and are included in pharmaceutical preparations. Their main forms are granular, liquid, powder, etc. The screening device is a device that uses the relative movement between bulk materials and the screen surface to allow some particles to pass through the sieve holes for screening.

[0003] Most pharmaceutical excipients are in powder form. During the production process of powdered pharmaceutical excipients, the fineness of the powder is related to the overall performance of the pharmaceutical excipients. Therefore, during the production process, the powdered pharmaceutical excipients need to be screened to improve the fineness of the pharmaceutical excipients. However, when the existing powdered pharmaceutical excipients are screened by a rotary vibrating screen or an ultrasonic vibrating screen, static electricity is easily generated between the powders, causing adhesion, resulting in clogging of the screen, and low screening efficiency.

[0004] CN216857343U discloses a high-efficiency automatic net cleaning and static elimination swing screen, including a screening box and an ultrasonic generator, a feed assembly is detachably mounted on the top of the screening box, a static eliminator is fixedly mounted on the bottom of the feed assembly, and multiple groups of screening assemblies are fixedly mounted at equal intervals from top to bottom inside the screening box. The swing screen achieves the effect of static elimination by arranging a static eliminator at the bottom of the feed assembly, but when used for screening pharmaceutical excipients, static electricity still exists between the pharmaceutical excipients and between them and the screen, resulting in the phenomenon that the screen is easily blocked. Therefore, an ultrasonic rotary vibrating screen for pharmaceutical excipients with high efficiency and static elimination is further developed. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide an ultrasonic rotary vibrating screen for pharmaceutical excipients which has a simple structure, is easy to use and can effectively remove static electricity.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] An ultrasonic rotary vibrating screen for pharmaceutical excipients comprises: a vibrating screen body, a plurality of screening cylinders are arranged on the vibrating screen body, a dust cover is movably connected to the top of the uppermost screening cylinder, a feed port is fixedly installed on the upper end of the dust cover; the uppermost screening cylinder is connected to the dust cover and the adjacent screening cylinders by a buckle; an ultrasonic screen is connected to the inner wall of the screening cylinder, and each side wall of the screening cylinder is provided with a discharge hole connected to a discharge pipe, a baffle plate for blocking the discharge hole is provided on the inner wall of the screening cylinder, and the baffle plate is connected to a joystick passing through the side wall of the screening cylinder; a grounding wire for removing static electricity is connected to the bottom of the ultrasonic screen, and the other end of the grounding wire is grounded.

[0008] In order to further eliminate the electrostatic effect between materials during the screening process, the applicant has made the following improvements:

[0009] A blowing ring pipe is provided on the side wall of the dust cover, and a blowing through hole is opened on the side wall of the blowing ring pipe. The center line of the blowing through hole is inclined downward and toward the center of the ultrasonic screen mesh surface. The dust cover located below the feed port is provided with an air vent, a mesh frame and a dust filter bag. The mesh frame cover is arranged on the air vent and connected to the dust cover, and the dust filter bag is sleeved on the mesh frame. The airflow blown out by the blowing ring pipe can quickly disperse the material entering the screening cylinder from the feed port, further reduce the electrostatic effect and adhesion between the materials, and make the material pass through the ultrasonic screen in the screening cylinder more dispersedly. The dust filter bag can not only maintain the balance of air pressure inside and outside the screening cylinder, but also prevent the overflow of dust during the use of the ultrasonic vibrating screen.

[0010] The air inlet of the blowing ring pipe is connected to the negative ion blower, and the negative ion blower blows out an airflow with negative ions, further reducing the static electricity generated between the materials rubbing against each other due to vibration on the ultrasonic screen, thereby preventing the materials on the screen from sticking due to static electricity.

[0011] The blowing ring pipe is arranged on the inner side wall of the dust cover in a spiral shape, or includes a plurality of air flow ring pipes which are connected and arranged on the inner side wall of the dust cover in a concentric circle.

[0012] Preferably, the blowing through hole is in a flat straight shape, which is conducive to forming a high-speed airflow to blow the material at the feed inlet toward the ultrasonic screen, promote the dispersion of the material on the screen, and improve the screening efficiency of the screen.

[0013] The ultrasonic screen comprises a stainless steel screen, a magnetic clamp, an ultrasonic transducer and an ultrasonic generator. The outer periphery of the stainless steel screen is fixed by a magnetic clamp, and the magnetic clamp is detachably connected to a magnetic suction piece arranged at the bottom of a screening cylinder. The bottom of the magnetic clamp is provided with a terminal connected to a grounding wire; the ultrasonic transducer is fixedly installed at the bottom center of the stainless steel screen, and the ultrasonic transducer is electrically connected to the ultrasonic generator. Specifically, the ultrasonic generator adopts the MD67-KMD-K1 model, and the ultrasonic transducer adopts the N50A model.

[0014] The free end of the terminal is bent into a U-shape, which facilitates the interface at the end of the grounding wire to be quickly inserted into the terminal and can prevent the grounding wire from being separated from the terminal during vibration.

[0015] The mesh apertures of the ultrasonic screen decrease from top to bottom.

[0016] The utility model has the following beneficial effects:

[0017] The ultrasonic rotary vibrating screen for pharmaceutical excipients is provided with multiple screening cylinders, which can perform graded screening of different particle sizes and is suitable for pharmaceutical excipients with various particle size ranges; the side wall of each screening cylinder is provided with a discharge hole connected to a discharge pipe, which is convenient for discharging the screened materials; the ultrasonic vibrating screen is used to introduce a low-amplitude, high-frequency ultrasonic vibration wave, so that the ultrafine powder is subjected to a huge ultrasonic acceleration, thereby improving the screening efficiency and accuracy; a grounding wire is installed at the bottom of the ultrasonic screen to eliminate static electricity and avoid affecting the screening effect due to static electricity adsorption, and is particularly suitable for pharmaceutical excipients with small particle sizes that are difficult to screen or that are agglomerated due to easy static electricity generation.

[0018] The dust cover is equipped with a blowing ring tube, which blows out air through the blowing holes, which can not only promote the dispersion of materials at the feed inlet, especially the negative ion airflow can effectively eliminate the static electricity between materials, but also help clean the screen to prevent the material from clogging the stainless steel screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the ultrasonic rotary vibrating sieve for pharmaceutical excipients according to Example 1 of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the ultrasonic rotary vibrating sieve for pharmaceutical excipients in Example 1 of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the blowing ring tube of the ultrasonic rotary vibrating screen for pharmaceutical excipients in Example 1 of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of an ultrasonic rotary vibrating sieve for pharmaceutical excipients according to Example 2 of the utility model;

[0023] Figure 5 for Figure 4 A magnified schematic diagram of center A.

[0024] Among them: 1. ultrasonic generator, 2. discharge pipe, 3. joystick, 4. screening cylinder, 5. dust cover, 6. feed port, 7. air vent, 8. mesh frame, 9. dust filter bag, 10. negative ion hair dryer, 11. air inlet, 12. buckle, 13. grounding wire, 14. vibrating screen body, 15. baffle plate, 16. blowing ring tube, 1601, blowing through hole, 17. stainless steel screen, 18. magnetic clamp, 19. magnetic suction part, 20. ultrasonic transducer, 21. terminal. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example 1

[0027] Reference Figure 1 and 2 , an ultrasonic rotary vibrating screen for pharmaceutical excipients of the present embodiment comprises: a vibrating screen body 14, on which a plurality of screening cylinders 4 are arranged, and a dust cover 5 is movably connected to the top of the top screening cylinder 4, and a feed port 6 is fixedly installed on the upper end of the dust cover 5; the top screening cylinder 4 is connected to the dust cover 5 and the adjacent screening cylinders 4 by a ring buckle 12; the inner wall of the screening cylinder 4 is connected with an ultrasonic screen, and each side wall of the screening cylinder 4 is provided with a discharge hole connected to the discharge pipe 2, and a baffle plate 15 for blocking the discharge hole is provided on the inner side wall of the screening cylinder 4, and the baffle plate 15 is connected to the joystick 3 that passes through the side wall of the screening cylinder 4; the bottom of the ultrasonic screen is connected with a grounding wire 13 for removing static electricity, and the other end of the grounding wire 13 is grounded.

[0028] A blowing ring tube 16 is provided on the side wall of the dust cover 5, and a blowing through hole 1601 is opened on the side wall of the blowing ring tube 16. The center line of the blowing through hole 1601 is inclined downward and toward the center of the ultrasonic screen mesh surface. The dust cover 5 located below the feed port 6 is provided with an air vent 7, a mesh frame 8 and a dust filter bag 9. The mesh frame 8 is covered on the air vent 7 and connected to the dust cover 5, and the dust filter bag 9 is sleeved on the mesh frame 8; the airflow blown out by the blowing ring tube 16 allows the material entering the screening cylinder 4 from the feed port 6 to be quickly dispersed, further reducing the electrostatic effect and adhesion between the materials, so that the materials can pass through the ultrasonic screen in the screening cylinder 4 in a more dispersed manner; the dust filter bag 9 can not only maintain the balance of the air pressure inside and outside the screening cylinder, but also prevent the overflow of dust during the use of the ultrasonic vibrating screen.

[0029] The air inlet 11 of the blowing ring tube 16 is connected to the negative ion hair dryer 10, and the negative ion hair dryer 10 blows out an airflow with negative ions, further reducing the static electricity generated between the materials rubbing against each other due to vibration on the ultrasonic screen, thereby preventing the materials on the screen from sticking due to static electricity.

[0030] Reference Figure 3 The blowing ring tube 16 is spirally arranged on the inner wall of the dust cover 5 , and the spacing between the blowing through holes 1601 on the blowing ring tube 16 gradually increases from top to bottom and is evenly distributed on the lower end surface of the inner wall of the blowing ring tube 16 .

[0031] Reference Figure 2 The ultrasonic screen comprises a stainless steel screen 17, a magnetic clamp 18, an ultrasonic transducer 20 and an ultrasonic generator 1. The outer periphery of the stainless steel screen 17 is fixed by the magnetic clamp 18, and the magnetic clamp 18 is detachably connected to a magnetic suction piece 19 arranged at the bottom of the screening cylinder 4. The bottom of the magnetic clamp 18 is provided with a terminal 21 connected to the grounding wire 13, and the terminal 21 is provided with a locking nut for fixing the connector of the grounding wire 13; the ultrasonic transducer 20 is fixedly installed at the bottom center of the stainless steel screen 17, and the ultrasonic transducer 20 is electrically connected to the ultrasonic generator 1, specifically: the ultrasonic generator 1 adopts the MD67-KMD-K1 model, and the ultrasonic transducer 20 adopts the N50A model.

[0032] The mesh apertures of the ultrasonic screen decrease from top to bottom.

[0033] Example 2

[0034] Reference Figure 4 Compared with Example 1, the ultrasonic rotary vibrating sieve for pharmaceutical excipients in this embodiment has the following differences:

[0035] The blowing ring pipe 16 includes a plurality of airflow ring pipes which are connected and arranged concentrically on the inner wall of the dust cover 5 .

[0036] Reference Figure 5 The blowing hole 1601 is in a flat straight shape, which is conducive to forming a high-speed airflow to blow the material from the feed port 6 toward the ultrasonic screen, promote the dispersion of the material on the screen, and improve the screening efficiency of the screen.

[0037] The free end of the terminal 21 is bent into a U-shape, which facilitates the interface at the end of the grounding wire 13 to be quickly inserted into the terminal 21 and prevents the grounding wire 13 from being separated from the terminal 21 during vibration.

[0038] Working principle and usage of this utility model:

[0039] During use, the pharmaceutical excipients enter through the feed port 6, and the pharmaceutical excipients are dispersed and scattered onto the ultrasonic screen at the bottom of the screening cylinder 4 under the action of the air flow blown out by the blowing ring tube 16. The ultrasonic generator 1 generates a high-power high-frequency alternating current, which generates high-frequency mechanical vibration through the ultrasonic transducer 20, driving the stainless steel screen 17 to vibrate at high speed, so that the pharmaceutical excipients are subjected to huge ultrasonic acceleration, so that the materials on the stainless steel screen 17 are always kept in a suspended state. At the same time, the grounding wire 13 at the bottom of the ultrasonic screen removes the static electricity generated by vibration and friction between the pharmaceutical excipients and between the pharmaceutical excipients and the stainless steel screen 17, thereby avoiding the phenomenon of the pharmaceutical excipients sticking and blocking the screen due to static electricity, thereby achieving the purpose of efficient screening and clearing the screen. By manipulating the joystick 3 and controlling the baffle plate 15 to move it away from the discharge hole, the pharmaceutical excipients that fail to pass through the ultrasonic screen at the bottom of the screening cylinder 4 are discharged through the discharge pipe 2 of the same level.

[0040] The stainless steel screen 17 on the ultrasonic screen is detachably connected to the screening cylinder 4, so that the stainless steel screen 17 of the corresponding mesh size can be replaced according to the screening particle size requirements of different pharmaceutical excipients. The magnetic clamp 18 and the magnetic suction member 19 can not only meet the rapid replacement of the stainless steel screen 17, but also fix the stainless steel screen 17 by magnetic attraction.

[0041] The utility model is an ultrasonic rotary vibrating screen for pharmaceutical excipients. A nozzle can also be provided at the blowing hole 1601 to increase the air flow velocity at the blowing hole 1601. The changes in the above technical features can be understood and implemented by technical personnel in the field through text descriptions, so no additional drawings are provided for illustration.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the utility model, which is only used to illustrate the technical solution of the utility model, and is not used to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model are included in the protection scope of the utility model.

Claims

1. An ultrasonic rotary vibrating sieve for pharmaceutical excipients, comprising: A vibrating screen body (14), wherein a plurality of screening cylinders (4) are arranged on the vibrating screen body (14), the top of the uppermost screening cylinder (4) is movably connected to a dust cover (5), and a feed port (6) is fixedly installed on the upper end of the dust cover (5); the uppermost screening cylinder (4) is connected to the dust cover (5) and the adjacent screening cylinders (4) by a buckle (12); an ultrasonic screen is connected to the inner wall of the screening cylinder (4), and each screening cylinder (4) side wall is provided with a discharge hole connected to a discharge pipe (2), and a baffle plate (15) for sealing the discharge hole is provided on the inner wall of the screening cylinder (4), and the baffle plate (15) is connected to a joystick (3) penetrating the side wall of the screening cylinder (4); characterized in that a grounding wire (13) for removing static electricity is connected to the bottom of the ultrasonic screen, and the other end of the grounding wire (13) is grounded.

2. The ultrasonic rotary vibrating sieve for pharmaceutical excipients according to claim 1, characterized in that: The dust cover (5) is provided with a blowing ring tube (16) on the side wall, and a blowing hole (1601) is opened on the side wall of the blowing ring tube (16). The center line of the blowing hole (1601) is inclined downward and toward the center of the ultrasonic screen mesh surface. The dust cover (5) located below the feed port (6) is provided with an air vent (7), a mesh frame (8) and a dust filter bag (9). The mesh frame (8) is covered on the air vent (7) and connected to the dust cover (5), and the dust filter bag (9) is sleeved on the mesh frame (8).

3. The ultrasonic rotary vibrating sieve for pharmaceutical excipients according to claim 2, characterized in that: The air inlet (11) of the blowing ring tube (16) is in communication with the negative ion hair dryer (10).

4. The ultrasonic rotary vibrating sieve for pharmaceutical excipients according to claim 2, characterized in that: The air blowing ring pipe (16) is arranged in a spiral shape on the inner side wall of the dust cover (5), or comprises a plurality of air flow ring pipes which are connected and arranged in a concentric circle on the inner side wall of the dust cover (5).

5. The ultrasonic rotary vibrating sieve for pharmaceutical excipients according to any one of claims 2 to 4, characterized in that: The air blowing hole (1601) is in a flat straight shape.

6. The ultrasonic rotary vibrating sieve for pharmaceutical excipients according to claim 1, characterized in that: The ultrasonic screen comprises a stainless steel screen (17), a magnetic clamp (18), an ultrasonic transducer (20) and an ultrasonic generator (1); the outer periphery of the stainless steel screen (17) is fixed by the magnetic clamp (18); the magnetic clamp (18) is detachably connected to a magnetic attraction member (19) arranged at the bottom of a screening drum (4); a terminal (21) connected to a grounding wire (13) is arranged at the bottom of the magnetic clamp (18); the ultrasonic transducer (20) is fixedly mounted at the bottom center of the stainless steel screen (17); and the ultrasonic transducer (20) is electrically connected to the ultrasonic generator (1).

7. The ultrasonic rotary vibrating sieve for pharmaceutical excipients according to claim 6, characterized in that: The free end of the terminal (21) is bent into a U-shape.

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