Screening device for medicinal silicon dioxide production

Abstract

The utility model discloses a screening device for medicinal silicon dioxide production, which comprises a screening cylinder (1), a feed hopper (2) is arranged at the upper end of the screening cylinder (1), a plurality of groups of vertically stacked screening trays (3) are arranged in the screening cylinder (1), a fixing frame (4) for fixing the screening trays (3) is arranged on the outer sides of the screening trays (3), and rotating shafts (5) for driving the fixing frame (4) to swing are arranged at two ends of the fixing frame (4). A clamping block (6) clamped with the fixing frame (4) is arranged at one end of the rotating shaft (5), a gear (7) is arranged at the other end of the rotating shaft (5), a rack (8) corresponding to the gear (7) is arranged outside the screening barrel (1), one side of the rack (8) is connected with a lead screw seat (9), a reciprocating lead screw (10) driving the lead screw seat (9) to reciprocate is arranged on one side of the lead screw seat (9), and a material collecting opening (11) is formed in the bottom of the screening barrel (1). The screening device has a good screening effect, and waste is reduced.

Description

Technical Field

[0001] The utility model relates to a screening device, in particular to a screening device for producing medicinal silicon dioxide. Background Art

[0002] Pharmaceutical silicon dioxide is a new type of excipient used in pharmaceutical preparations. It is a white powder with high purity and good fluidity. It is mainly used as a lubricant, anti-adhesive agent, and flow aid. It is particularly suitable for granulation of oil and extract drugs. The prepared granules have good fluidity and compressibility. They are used as flow aids in direct tableting, and can also be used as filter aids, clarifiers, and suspending agents and thickeners for liquid preparations. It is an excellent flow promoter in the tablet making process, which can greatly improve the fluidity of the particles, increase the bulk density, increase the hardness of the prepared tablets, shorten the disintegration time, and thus increase the drug dissolution rate.

[0003] For example, the patent with application number 202221381896.9 discloses a pharmaceutical silica preparation device, in which the finished product produced by grinding will be screened through a screening box, and the unqualified pharmaceutical silica powder will be transported to the feed port for reprocessing through a lifting mechanism. During screening, the knocking mechanism can knock on the screening mechanism to prevent the sieve holes in the sieve plate from being blocked and affecting the screening effect. After grinding, the material is screened through the sieve plate. Although the sieve plate can be periodically knocked by the knocking mechanism, there is still a situation where the sieve holes are blocked, causing the qualified pharmaceutical silica to move quickly along the sieve plate under the action of knocking, and does not fall from the sieve holes, so it is transported to the lifting mechanism. Due to the small particle size of the qualified pharmaceutical silica, it cannot be lifted by the lifting mechanism, resulting in waste. Utility Model Content

[0004] The purpose of the utility model is to provide a screening device for producing medicinal silicon dioxide, which has a better screening effect and reduces waste.

[0005] The technical solution of the utility model is as follows: a screening device for producing medicinal silicon dioxide comprises a screening cylinder, a feeding hopper is arranged at the upper end of the screening cylinder, a plurality of groups of sieve plates stacked up and down are arranged inside the screening cylinder, a fixing frame for fixing the sieve plates is arranged outside the sieve plates, a rotating shaft for driving the fixing frame to swing is arranged at both ends of the fixing frame, a clamping block engaged with the fixing frame is arranged at one end of the rotating shaft, a gear is arranged at the other end of the rotating shaft, a rack corresponding to the gear is arranged outside the screening cylinder, one side of the rack is connected to a screw seat, a reciprocating screw for driving the screw seat to reciprocate is arranged at one side of the screw seat, and a material collection port is arranged at the bottom of the screening cylinder.

[0006] In the aforementioned screening device for producing pharmaceutical silicon dioxide, the size of the sieve holes on the sieve plate decreases continuously from top to bottom.

[0007] In the aforementioned screening device for producing pharmaceutical silica, the fixed frame includes annular side plates corresponding to the shape of the sieve plate and arranged on the upper and lower sides of the sieve plate, a connecting plate is provided between the annular side plates, a fastening knob is provided at the connection between the annular side plate and the connecting plate, and a limit block corresponding to the sieve plate is provided at the end of the annular side plate away from the fastening knob.

[0008] In the aforementioned screening device for producing medicinal silicon dioxide, a card slot corresponding to the card block is provided on the outer side of the upper annular side plate.

[0009] Compared with the prior art, the utility model can achieve multi-level screening by arranging multiple groups of sieve plates stacked up and down. The fixed frame can lock the sieve plates to prevent them from falling off when they swing. The reciprocating screw drives the screw seat to reciprocate, so that the rack and the rotating shaft can cooperate to make the sieve plates swing back and forth for screening. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model.

[0011] The markings in the attached drawings are: 1-screening cylinder, 2-feed hopper, 3-sieve plate, 4-fixed frame, 5-rotating shaft, 6-block, 7-gear, 8-rack, 9-screw seat, 10-reciprocating screw, 11-collecting port, 13-annular side plate, 14-connecting plate, 15-fastening knob, 16-limit block, 17-slot. DETAILED DESCRIPTION

[0012] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0013] Embodiment. A screening device for producing pharmaceutical silicon dioxide, comprising: Figure 1 As shown, it includes a screening drum 1, a feeding hopper 2 is provided at the upper end of the screening drum 1, a plurality of groups of sieve plates 3 stacked up and down are provided inside the screening drum 1, a fixing frame 4 for fixing the sieve plates 3 is provided outside the sieve plates 3, rotating shafts 5 for driving the fixing frame 4 to swing are provided at both ends of the fixing frame 4, a clamping block 6 engaged with the fixing frame 4 is provided at one end of the rotating shaft 5, a gear 7 is provided at the other end of the rotating shaft 5, a rack 8 corresponding to the gear 7 is provided outside the screening drum 1, one side of the rack 8 is connected to a screw seat 9, a reciprocating screw 10 for driving the screw seat 9 to reciprocate is provided on one side of the screw seat 9, and a collecting port 11 is provided at the bottom of the screening drum 1.

[0014] The size of the sieve holes on the sieve plate 3 decreases continuously from top to bottom.

[0015] The fixing frame 4 includes an annular side plate 13 corresponding to the shape of the sieve plate 3 and arranged on the upper and lower sides of the sieve plate 3, a connecting plate 14 is provided between the annular side plates 13, a fastening knob 15 is provided at the connection between the annular side plate 13 and the connecting plate 14, and a limit block 16 corresponding to the sieve plate 3 is provided at the end of the annular side plate 13 away from the fastening knob 15.

[0016] A clamping groove 17 corresponding to the clamping block 6 is provided on the outer side of the upper annular side plate 13 .

[0017] Working principle of the present application: When installing the present application, first select the sieve plate 3 according to the medicinal silica grading standard, stack multiple groups of sieve plates 3 together, and the size of the sieve holes on the sieve plate 3 is continuously reduced from top to bottom, so as to achieve multi-level screening, and the fixed frame 4 can fix the sieve plate 3 to prevent the sieve plate 3 from separating and disengaging. The fixed frame 4 includes two annular side plates 13, which are sleeved at both ends of the sieve plate 3. The limit block 16 can prevent the sieve plate from detaching from the fixed frame 4. Through the relative movement of the annular side plate 13 and the connecting plate 14, the fixed frame 4 can be suitable for different numbers of sieve plates. When in use, the motor can drive the reciprocating screw 10 to move, and the reciprocating screw 10 will drive the screw seat 9 to reciprocate during the movement, so that the rack 8 will cooperate with the gear 7 to make the sieve plate 3 swing, improve the screening effect, and the medicinal silica component at the bottom can be discharged through the aggregate port 11.

Claims

1. A screening device for producing pharmaceutical silicon dioxide, characterized in that: The invention comprises a screening drum (1), wherein a feed hopper (2) is provided at the upper end of the screening drum (1), a plurality of groups of sieve plates (3) stacked up and down are provided inside the screening drum (1), a fixing frame (4) for fixing the sieve plates (3) is provided outside the sieve plates (3), a rotating shaft (5) for driving the fixing frame (4) to swing is provided at both ends of the fixing frame (4), a clamping block (6) for clamping with the fixing frame (4) is provided at one end of the rotating shaft (5), a gear (7) is provided at the other end of the rotating shaft (5), a rack (8) corresponding to the gear (7) is provided outside the screening drum (1), one side of the rack (8) is connected to a screw seat (9), one side of the screw seat (9) is provided with a reciprocating screw (10) for driving the screw seat (9) to reciprocate, and a material collection port (11) is provided at the bottom of the screening drum (1).

2. A screening device for producing pharmaceutical silicon dioxide according to claim 1, characterized in that: The size of the sieve holes on the sieve plate (3) decreases continuously from top to bottom.

3. A screening device for producing pharmaceutical silicon dioxide according to claim 1, characterized in that: The fixing frame (4) comprises an annular side plate (13) corresponding to the shape of the sieve plate (3) and arranged on the upper and lower sides of the sieve plate (3); a connecting plate (14) is arranged between the annular side plates (13); a fastening knob (15) is arranged at the connection between the annular side plate (13) and the connecting plate (14); and a limit block (16) corresponding to the sieve plate (3) is arranged at the end of the annular side plate (13) away from the fastening knob (15).

4. A screening device for producing pharmaceutical silicon dioxide according to claim 3, characterized in that: A clamping groove (17) corresponding to the clamping block (6) is provided on the outer side of the upper annular side plate (13).

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