A pharmaceutical powder screening device

Abstract

This utility model relates to the field of grinding technology, and in particular to a drug powder screening device, including a screen installed in the main discharge chamber of a grinder, and a pushing structure with a pushing plate that can reciprocate on the screen. The pushing structure of this utility model includes: a screen installed on the body of the grinder, a slide rail, a pushing plate supported by the slide rail and capable of sliding on the slide rail, a reciprocating rod with one end fixedly connected to the pushing plate and the other end extending out of the body, a limiting plate installed on the reciprocating rod, a rack fixedly connected to the reciprocating rod, and a gear meshing with the rack. The limiting plate is connected to the body by a limiting structure. The gear can be controlled to rotate by a motor. When the pushing plate reciprocates, it can push unqualified drug particles into the spare discharge chamber. This utility model can avoid excessive accumulation of drugs on the screen by the pushing plate, thereby ensuring the screening efficiency of the screen.

Description

Technical Field

[0001] This utility model relates to the field of grinding technology, and in particular to a drug powder screening device. Background Technology

[0002] In recent years, to ensure that the efficacy of drugs is not compromised, an increasing number of capsule-type drugs have emerged. Capsule-type drugs refer to capsules made by encapsulating drugs (powder or granules) in a specific dosage form within a special film-forming material (such as gelatin, cellulose, and polysaccharides). The outer capsule layer protects the drug. When taken by the consumer, this avoids the difficulties in taking medication caused by traditional powders (or granules) due to unpleasant taste, volatility, easy decomposition by saliva in the mouth, and easy aspiration into the trachea.

[0003] Currently, in the production process of capsule-type drugs, at least one step requires pulverizing the lumpy solid drug into smaller powders or granules. Therefore, a grinder is needed to crush and grind the lumpy drug vials. However, existing drug grinders have the following drawbacks in use:

[0004] After prolonged use, the wear of the grinding rollers in a grinder leads to a decrease in the grinding efficiency of the medicine. Therefore, to ensure the qualified rate of the medicine when the grinder discharges the material, a screen is usually installed downstream of the grinding rollers. After grinding, the medicine needs to be screened. Qualified medicine particles pass through the screen and are discharged, while unqualified medicine particles remain on the screen. However, over time, when too many medicine particles accumulate on the screen, it can easily affect the screening efficiency of the screen, thereby affecting the discharge of the grinder.

[0005] In summary, the above problems need to be addressed. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a drug powder screening device for use in a drug grinder, which aims to solve the problems mentioned in the background technology.

[0007] The technical solution of this utility model is implemented as follows: a drug grinder, comprising:

[0008] The machine body has a grinding chamber, a feed inlet, and a discharge outlet;

[0009] The grinding device has at least two grinding rollers that can rotate relative to each other, with a grinding gap formed between adjacent grinding rollers. The grinding chamber includes a main discharge chamber and a spare discharge chamber connected to the main discharge chamber. Both the main discharge chamber and the spare discharge chamber have discharge ports.

[0010] It also includes a powder screening device installed on the machine body and located at the connection between the main discharge chamber and the spare discharge chamber; the powder screening device includes at least:

[0011] The screen is installed inside the main discharge chamber;

[0012] The feeding structure has a feeding plate that can reciprocate on the screen.

[0013] When the pusher plate reciprocates, it can push unqualified granules into the spare discharge chamber.

[0014] By adopting the above technical solution:

[0015] The grinding mill of this invention is equipped with a spare discharge chamber, which is used to discharge unqualified medicine particles accumulated on the screen. In addition, in order to increase the screening efficiency of the screen, this invention is equipped with a pushing structure. When the pushing plate of the pushing structure moves back and forth on the screen, it can increase the screening efficiency of the screen and push unqualified medicine particles into the spare discharge chamber, so as to avoid the unqualified medicine particles accumulating on the screen and affecting the screening efficiency of the screen.

[0016] Preferably, the machine body is provided with a mounting port for detachable connection of the grinding device; wherein, the grinding device includes:

[0017] The dismantling frame consists of spaced-apart support plates and support rods connecting the support plates;

[0018] The grinding roller is rotatably connected to the support plate;

[0019] The disassembly plate is integrally formed on any support plate and has a first threaded hole;

[0020] An electric motor is mounted on any support plate and is used to control the rotation of the grinding roller. A drive gear is mounted on any support plate and connected to the grinding roller via a transmission shaft and meshing with it.

[0021] The machine body is provided with a second threaded hole corresponding to the first threaded hole. The first threaded hole and the second threaded hole are passed through by bolts in sequence, and the support plate is fixed to the machine body.

[0022] Preferably, the mounting port consists of a first mounting port and a second mounting port located on both sides of the machine body. The second mounting port is smaller than the first mounting port, and a limiting area adapted to the support plate is provided on the inner wall of the machine body.

[0023] By adopting the above technical solution:

[0024] The grinding device of this utility model integrates two grinding rollers on a disassembly frame. When disassembling, the two grinding rollers can be removed from the machine body by disassembling the disassembly frame, making disassembly more convenient.

[0025] Preferably, the pusher structure includes:

[0026] A screen is installed on the machine body;

[0027] Slide rails are mounted on the machine body;

[0028] The pusher plate is supported by the slide rail and can slide on the slide rail, and is located above the screen.

[0029] The reciprocating rod is fixedly connected to the pusher plate at one end, and extends out of the machine body at the other end;

[0030] The limiting plate is installed on the reciprocating rod and has a limiting structure connecting it to the machine body;

[0031] The rack is fixedly connected to the reciprocating rod;

[0032] Gears mesh with racks and are mounted on the machine body in a rotating manner;

[0033] The gear can be rotated by a motor.

[0034] Preferably, the limiting structure includes:

[0035] The positioning bushing is installed on the machine body and has a telescopic cavity;

[0036] A telescopic shaft is slidably connected to the telescopic cavity, with one end extending out of the telescopic cavity;

[0037] A limit spring is installed between the telescopic cavity and the telescopic shaft;

[0038] One end of the telescopic shaft is fixedly connected to the limiting plate.

[0039] By adopting the above technical solution:

[0040] The material pushing structure of this utility model is controlled by gears. The gears control the movement of the reciprocating rod by meshing with the rack. When the gears separate from the rack, the reciprocating rod moves back to its original position through the limiting structure, thereby realizing the reciprocating movement of the material pushing plate.

[0041] Preferably, the pusher structure has two parts, which are respectively installed on both sides of the machine body;

[0042] The machine body is rotatably connected to pulleys corresponding to the gears of each pushing structure via mounting plates, and belts are connected between the pulleys for transmission.

[0043] By adopting the above technical solution:

[0044] This invention increases the frequency of material feeding by increasing the number of feeding structures, enabling the screen to screen the medicine particles more quickly.

[0045] Preferably, a dispersing block for dispersing powder is fixedly connected to the side of the pusher plate near the screen.

[0046] Preferably, the cross-section of the actuating block is circular or elliptical.

[0047] By adopting the above technical solution:

[0048] This invention features a toggle block on the pusher plate, which can better disperse the drug particles on the screen.

[0049] Preferably, a baffle plate is fixedly connected to the machine body above the slide rail. The baffle plate can prevent the pills from falling directly onto the slide rail and affecting the movement of the pusher plate. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 This is a front structural diagram of a specific embodiment 1 of the present utility model;

[0052] Figure 2 This is a schematic diagram of the back structure of a specific embodiment 1 of the present utility model;

[0053] Figure 3 for Figure 1 AA section view;

[0054] Figure 4 This is a schematic diagram of the grinding device in specific embodiment 1 of this utility model;

[0055] Figure 5 for Figure 4 Another perspective illustration;

[0056] Figure 6 for Figure 1 A schematic diagram of the structure without the grinding device;

[0057] Figure 7 for Figure 6 A structural diagram with parts of the machine removed;

[0058] Figure 8 This is a schematic diagram of the limiting structure in specific embodiment 1 of this utility model;

[0059] Figure 9 for Figure 3 Sectional view in;

[0060] Figure 10 This is a schematic diagram of the structure of a specific embodiment 2 of the present utility model;

[0061] Figure 11 This is a structural schematic diagram of a specific embodiment 3 of the present utility model;

[0062] Figure 12 for Figure 11 CC section view in the middle;

[0063] Figure 13 This is a schematic diagram of the bottom of the push plate in specific embodiment 3 of this utility model;

[0064] Figure 14 This is a schematic diagram of another limiting structure in specific embodiment 3 of this utility model. Detailed Implementation

[0065] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0066] like Figures 1-9 As shown, this utility model discloses a drug grinder, comprising:

[0067] The machine body 10 has a grinding chamber 100, a feed inlet 101 and a discharge outlet 102. The feed inlet 101 is a feed hopper installed on the top of the machine body 10.

[0068] The grinding device has at least two grinding rollers 20 that can rotate relative to each other, and a grinding gap is formed between adjacent grinding rollers 20. The grinding chamber 100 includes a main discharge chamber 100a and a spare discharge chamber 100b connected to the main discharge chamber 100a. Both the main discharge chamber 100a and the spare discharge chamber 100b have discharge ports 102.

[0069] It also includes a powder screening device installed on the machine body 10 and located at the connection position between the main discharge chamber 100a and the spare discharge chamber 100b; the powder screening device includes at least:

[0070] Screen 30 is installed in the main discharge chamber 100a. In this embodiment, the length of the screen is not limited.

[0071] The feeding structure has a feeding plate 310 that can reciprocate on the screen 30;

[0072] When the pusher plate 310 reciprocates, it can push unqualified granules into the spare discharge chamber 100b.

[0073] In this embodiment: the machine body 10 is provided with a mounting port for detachable connection of the grinding device; wherein, the grinding device includes:

[0074] The dismantling frame consists of spaced-apart support plates 13 and support rods 14 connected between the support plates 13;

[0075] Grinding roller 20 is rotatably connected to support plate 13;

[0076] The disassembly plate 15 is integrally formed on any support plate 13 and has a first threaded hole 151.

[0077] The first motor 16 is mounted on any support plate 13 and is used to control the rotation of the grinding roller 20. A drive gear 17 is mounted on any support plate 13 and is connected to the grinding roller 20 and meshes with it through a transmission shaft.

[0078] The machine body 10 is provided with a second threaded hole 152 corresponding to the first threaded hole 151. The first threaded hole 151 and the second threaded hole 152 are passed through by bolts 153 in sequence, and the support plate 13 is fixed to the machine body 10.

[0079] In this embodiment: the mounting port consists of a first mounting port 121 and a second mounting port 122 provided on both sides of the body 10. The second mounting port 122 is smaller than the first mounting port 121, and a limiting area 123 adapted to the support plate 13 is provided on the inner wall of the body 10. The limiting area 123 of the first mounting port 121 is adapted to the disassembly plate, and the limiting area of ​​the second mounting port 122 is adapted to the support plate. The limiting area is recessed on the outer or inner wall of the body for the disassembly plate or the support plate to be inserted.

[0080] In this embodiment, the machine body is also provided with a support plate 125 for supporting the disassembly frame.

[0081] In this embodiment: the pusher structure includes:

[0082] Screen 30 is installed on the machine body 10;

[0083] Slide rail 32 is mounted on body 10;

[0084] The pusher plate 310 is supported by the slide rail 32 and can slide on the slide rail 32, and is located above the screen 30;

[0085] The reciprocating rod 311 is fixedly connected at one end to the pusher plate 310, and the other end extends out of the machine body 10;

[0086] The limiting plate 312 is installed on the reciprocating rod 311 and is connected to the body 10 by a limiting structure;

[0087] Rack 313 is fixedly connected to reciprocating rod 311;

[0088] Gear 314 meshes with rack 313 and is rotatably mounted on body 10;

[0089] The gear 314 can be rotated by the second motor 315.

[0090] In this embodiment, a gear support plate 40 is installed on the body 10, a second motor 315 is installed on the gear support plate, and a gear 314 is rotatably connected to the gear support plate 40 through a transmission shaft.

[0091] In this embodiment: the limiting structure includes:

[0092] The positioning bushing 50 is installed on the machine body 10 and has a telescopic cavity 51. The positioning bushing 50 is integrally formed in the machine body 10 or can be embedded in the machine body 10.

[0093] The telescopic shaft 52 is slidably connected to the telescopic cavity 51, and one end extends out of the telescopic cavity 51 and has a sliding part 52a;

[0094] A limiting spring 53 is installed between the telescopic cavity 51 and the telescopic shaft 52;

[0095] One end of the telescopic shaft 52 is fixedly connected to the limiting plate 312.

[0096] In this embodiment, a baffle plate 70 located above the slide rail 32 is fixedly connected to the body 10. The baffle plate can prevent the pills from falling directly onto the slide rail and affecting the movement of the pusher plate.

[0097] refer to Figures 1-9 The principle of this embodiment is:

[0098] Grinding principle: Reference Figure 3 The drug enters the grinding chamber from the feed hopper, and after being ground by the grinding device, it falls off the screen. After being screened by the screen, qualified drug particles are discharged from the discharge port at the bottom of the discharge chamber.

[0099] During grinding, the first motor controls the rotation of the grinding shaft, and uses meshing drive gears to control the rotation of the other grinding shaft, causing the two grinding shafts to rotate relative to each other (to...). Figure 5 For reference, the grinding shaft on the left can be controlled to rotate clockwise, while the grinding shaft on the right is controlled to rotate counterclockwise by the drive gear, thus completing the grinding of the drug.

[0100] Screening principle: (Refer to) Figure 1 , Figure 3 as well as Figures 7-9During screening, the second motor controls the gear to rotate (e.g., counterclockwise). When the gear meshes with the rack, the rack controls the reciprocating rod to move to the right, thereby driving the pusher plate to move to the right. When the gear separates from the rack, the reciprocating rod is controlled to move to the left by the telescopic shaft and limit spring of the limiting structure. In this way, the reciprocating movement of the pusher plate is controlled.

[0101] When the pusher plate reciprocates, it pushes the medicine particles on the screen, thereby increasing the screening efficiency of the screen. When the pusher plate moves to the right, it can push the medicine particles on the screen to the right and discharge them from the spare discharge chamber. Most of the medicine particles discharged from the spare discharge chamber are unqualified medicine particles that need to be ground again. The pusher plate discharges these medicine particles to avoid excessive accumulation of medicine particles on the screen, which would affect the screening effect of the screen.

[0102] Due to the continuous movement of the pusher plate, when falling pills land on the pusher plate or reciprocating rod, they will also fall onto the screen as the reciprocating rod and pusher plate continue to move.

[0103] Disassembly and installation principles of the grinding device: (Refer to...) Figures 1-2 , Figures 4-7 During installation, push the disassembly frame into the first installation port, and the support plate can be inserted into the limiting area of ​​the second installation port to complete the position adjustment. Then, use bolts to fix the support plate and the disassembly plate to complete the installation. Similarly, during disassembly, remove the bolts and take out the disassembly frame to complete the disassembly of the two grinding rollers.

[0104] Example 2 is another variation of Example 1, and the difference from Example 1 is that:

[0105] like Figure 10 As shown, Example 2 has two spare discharge chambers, so that when the pusher plate reciprocates, unqualified granules can be discharged from the left or right spare discharge chamber.

[0106] Example 3 is another variation of Example 2, and the difference from Example 2 is that:

[0107] like Figures 11-14 As shown, in this embodiment: there are three spare discharge chambers 100b, two main discharge chambers 100a, and two push structures, which are respectively installed on both sides of the machine body 10;

[0108] The machine body 10 is rotatably connected to pulleys 61 corresponding to the gears 314 of each pushing structure via mounting plate 60, and belts 62 are connected between the pulleys 61.

[0109] In this embodiment, a second motor 315 is provided and is used to drive any gear 314 to rotate.

[0110] In this embodiment, the pusher plate 310 is fixedly connected to a toggle block 310a for dispersing powder (particles) on the side near the screen.

[0111] In this embodiment, the cross-section of the actuating block 310a is circular or elliptical.

[0112] refer to Figures 11-14 In this embodiment, two main discharge chambers are provided. The medicine particles ground by the grinding device fall onto the screens on both sides. When the pusher plate moves, it pushes the medicine particles on each screen. Qualified medicine particles pass through the screen and are discharged, while unqualified medicine particles are pushed to the spare discharge chamber for discharge.

[0113] One way to promote the structure is to refer to... Figures 11-14 The second motor drives the right gear to rotate counterclockwise, and the right reciprocating rod controls the right pusher block to move to the right. At this time, the left gear also rotates counterclockwise through the belt pulley and controls the left pusher block to move to the right. When the right gear separates from the rack, the right reciprocating rod is controlled to move to the left by the right limiting structure. When the left gear separates from the rack, the left reciprocating rod is controlled to move to the left by the left limiting structure. In other words, in this embodiment, limiting structures are set between the limiting plates on the reciprocating rods on both sides of the machine body and the machine body.

[0114] To elaborate further: the limiting structure of the right-side pusher structure can be referenced. Figure 8 When the gear rotates counterclockwise and meshes with the rack, it drives the reciprocating rod to move to the right and compresses the limit spring. When the gear rotates counterclockwise and disengages from the rack, the limit spring resets and controls the reciprocating rod to move to the left.

[0115] The limiting structure of the left-side pusher structure can be referenced. Figure 14 When the gear rotates counterclockwise and meshes with the rack, it drives the reciprocating rod to move to the right and compresses the limit spring. When the gear rotates counterclockwise and separates from the rack, the limit spring resets and controls the reciprocating rod to move to the left.

[0116] It should be noted that when the agitator pushes the medicine particles to move, it guides the particles to disperse to both sides of the agitator, thereby dispersing the particles and assisting the screen in better screening them.

[0117] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pharmaceutical powder screening device, characterized in that: At least including: A screen (30) is installed in the main discharge chamber (100a) of the grinder; The pusher structure has a pusher plate (310) that can reciprocate on the screen (30). When the pusher plate (310) reciprocates, it can push unqualified granules into the spare discharge chamber (100b) of the grinder.

2. The drug powder screening device according to claim 1, characterized in that: The pusher structure includes: A screen (30) is installed on the machine body (10); The slide rail (32) is mounted on the body (10); The pusher plate (310) is supported by the slide rail (32) and can slide on the slide rail (32) and is located above the screen (30); The reciprocating rod (311) is fixedly connected at one end to the pusher plate (310), and the other end protrudes from the machine body (10); The limiting plate (312) is installed on the reciprocating rod (311) and is connected to the body (10) by a limiting structure; The rack (313) is fixedly connected to the reciprocating rod (311); The gear (314) meshes with the rack (313) and is mounted on the body (10) in a rotatable manner; The gear (314) can be rotated by a motor (315).

3. The drug powder screening device according to claim 2, characterized in that: The pusher structure has two parts, which are respectively installed on both sides of the machine body (10); The machine body (10) is rotatably connected to pulleys (61) corresponding to the gears (314) of each pushing structure via mounting plate (60), and belts (62) are connected between the pulleys (61).

4. The drug powder screening device according to claim 2, characterized in that: The pusher plate (310) is fixedly connected to a toggle block (310a) for dispersing powder on the side near the screen (30).

5. The drug powder screening device according to claim 4, characterized in that: The cross-section of the actuating block (310a) is circular or elliptical.

6. The drug powder screening device according to claim 2, characterized in that: A baffle plate (70) located above the slide rail (32) is fixedly connected to the machine body (10).

7. A drug powder screening device according to claim 2, characterized in that: The limiting structure includes: The positioning bushing (50) is installed on the machine body (10) and has a telescopic cavity (51). The telescopic shaft (52) is slidably connected to the telescopic cavity (51), and one end extends out of the telescopic cavity (51). A limiting spring (53) is installed between the telescopic cavity (51) and the telescopic shaft (52); One end of the telescopic shaft (52) is fixedly connected to the limiting plate (312).

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