Superfine crushing device for powder injection production

Abstract

The utility model relates to a superfine grinding device for powder injection production, which comprises an upper cover body, a lower cover body and an inner shell, an annular pipe is arranged on the outer wall of the upper cover body; a plurality of nozzles are formed in the annular pipe; the plurality of nozzles are inclined towards the same direction; a plurality of overflowing openings matched with the nozzles are formed in the side wall of the inner shell; a plurality of positioning plates arranged at intervals are arranged on the side wall of the lower cover body; the side wall of the upper cover body is provided with a guide groove for inserting and clamping the positioning plate; positioning holes for mounting positioning nuts are formed in the guide groove and the positioning plate; the upper cover body is provided with a plurality of positioning grooves surrounding the pipe orifice of the discharge pipe; and a plurality of positioning blocks matched with the positioning grooves are arranged at the top of the inner shell. According to the utility model, the structural design is reasonable, the upper cover body communicated with the front and rear equipment is matched with the lower cover body capable of being quickly detached, so that the equipment can be quickly detached, overhauled and replaced, the lost inner shell can be quickly replaced, and the equipment maintenance cost and the overhaul downtime are reduced.

Description

Technical Field

[0001] This utility model relates to the field of pulverizing devices, and in particular to an ultrafine pulverizing device for the production of powder injections. Background Technology

[0002] Sterile powders for injection, also known as powder for injection, are a dosage form prepared for drugs that are unstable in water. An air jet mill is a device that uses a high-speed airflow to pulverize solid materials. Chinese patent document CN118320955B discloses an airflow pulverizer and its circulating pulverizing system, including a lower cover and an upper cover. A lower hollow air injection ring is connected to the outer side of the lower cover, and a lower air inlet pipe is connected to the lower hollow air injection ring outward. Multiple lower air jet nozzles inclined in the same direction are installed between the outer wall of the lower cover and the lower hollow air injection ring. The two ends of the lower air jet nozzles are connected to the lower hollow air injection ring and the lower cover, respectively. A lower feed pipe is connected to the lower cover outward below the lower air jet nozzles. An upper hollow air injection ring is connected to the outer side of the upper cover, and an upper air inlet pipe is connected to the upper hollow air injection ring outward. Multiple upper air jet nozzles inclined in the opposite direction to the lower air jet nozzles are installed between the outer wall of the upper cover and the upper hollow air injection ring, and the two ends of the upper air jet nozzles are connected to the upper hollow air injection ring and the upper cover, respectively. An upper feed pipe is connected to the upper cover outward, and a pulverizing discharge pipe is connected to the upper cover upward. However, most existing ultrafine pulverizing devices have complex structures, high production costs, and after long-term use and crushing, the equipment suffers severe wear and tear, affecting the airflow efficiency and crushing efficiency, and resulting in high maintenance costs. Utility Model Content

[0003] The purpose of this utility model is to provide an ultrafine pulverizing device for the production of powder injections, which solves the problems of existing ultrafine pulverizing devices having complex structures, high production costs, severe wear and tear over long periods of time, affecting airflow efficiency, crushing efficiency, and high maintenance costs.

[0004] To address the aforementioned problems, this utility model provides an ultrafine pulverizing device for powder injection production, comprising an upper cover connecting a feed pipe and a discharge pipe, a lower cover detachably connected to the upper cover, and an inner shell disposed on the lower cover and tightly against the inner wall of the upper cover; the outer wall of the upper cover is provided with a ring pipe connecting to an external high-pressure gas source; the ring pipe is provided with multiple nozzles connecting to the inner cavity of the inner shell; the multiple nozzles are inclined in the same direction; the side wall of the inner shell is provided with multiple flow ports matching the nozzles; the side wall of the lower cover is provided with multiple spaced positioning plates; the side wall of the upper cover is provided with guide grooves for inserting the positioning plates; both the guide grooves and the positioning plates are provided with positioning holes for installing positioning nuts; the upper cover is provided with multiple positioning grooves surrounding the discharge pipe opening; the top of the inner shell is provided with multiple positioning blocks matching the positioning grooves.

[0005] The ultrafine pulverizing device for powder injection production provided by this utility model also has the following technical features:

[0006] Furthermore, the lower cover is provided with a conical support groove to support the inner shell; the inner shell is detachably installed in the support groove; the inner shell includes an upper shell that is close to the inner wall of the upper cover, a conical lower shell that is close to the inner wall of the support groove, and a middle shell that connects the upper shell and the lower shell; the flow port is provided on the middle shell; the side wall of the upper shell is provided with an inlet that communicates with the feed pipe and an outlet that communicates with the discharge pipe.

[0007] Furthermore, the support groove is provided with a rubber support surface to support the lower shell.

[0008] Furthermore, the inner wall of the inner shell is provided with an arc-shaped guiding surface that guides the connection between the upper shell and the middle shell, and guides the connection between the lower shell and the middle shell.

[0009] Furthermore, the upper cover is provided with a conical hopper whose cross-section gradually decreases along the direction close to the discharge pipe.

[0010] Furthermore, the hopper is provided with a deceleration device that communicates with the inner cavity of the inner shell; the deceleration device includes a plurality of nozzles that communicate with the inner cavity of the inner shell and are equipped with pulse valves, an air ring that communicates with the plurality of nozzles, and a through pipe that communicates with the air ring and the ring pipe.

[0011] Furthermore, the inner shell is made of wear-resistant ceramic material.

[0012] This utility model has the following beneficial effects: The structure is reasonable and simple. By connecting the upper cover of the front and rear equipment and cooperating with the quickly detachable lower cover, it enables rapid disassembly, maintenance, and replacement of the equipment, allowing for quick replacement of the worn inner shell, thus reducing equipment maintenance costs and downtime. The detachable inner shell within the lower cover further reduces the cost of replacing worn parts, and the conical upper and lower shells ensure stable and high-speed airflow, guaranteeing high-speed collision of internal materials and maximizing crushing efficiency. The deceleration device temporarily slows down the internal materials, deflecting some of the material's movement and increasing the probability of particle collision, effectively increasing crushing efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0014] Figure 2 This is a cross-sectional view of the lower cover body according to an embodiment of the present utility model;

[0015] Figure 3 This is an exploded view of the structure of an embodiment of the present utility model;

[0016] In the diagram: 1-Upper cover, 11-Feed pipe, 12-Discharge pipe, 13-Positioning groove, 14-Guide groove, 15-Gathering hopper, 2-Lower cover, 21-Positioning plate, 22-Support groove, 3-Inner shell, 31-Upper shell, 311-Inlet, 312-Outlet, 32-Middle shell, 33-Lower shell, 34-Flow port, 35-Positioning block, 4-Ring pipe, 41-Nozzle, 5-Reduction device, 51-Nozzle, 52-Air ring, 53-Pass pipe. Detailed Implementation

[0017] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0018] like Figures 1 to 3 In one embodiment of the ultrafine pulverizing device for powder injection production of this utility model, the device includes an upper cover 1 connecting the feed pipe 11 and the discharge pipe 12, a lower cover 2 detachably connected to the upper cover 1, and an inner shell 3 disposed on the lower cover 2 and tightly attached to the inner wall of the upper cover 1. The outer wall of the upper cover 1 is provided with a ring pipe 4 connecting to an external high-pressure gas source. The ring pipe 4 is provided with multiple nozzles 41 connecting to the inner cavity of the inner shell 3. The multiple nozzles 41 are inclined in the same direction. The side wall of the inner shell 3 is provided with multiple flow ports 34 matching the nozzles 41. The side wall of the lower cover 2 is provided with multiple spaced positioning plates 21. The side wall of the upper cover 1 is provided with guide grooves 14 for inserting the positioning plates 21. Both the guide grooves 14 and the positioning plates 21 are provided with positioning holes for installing positioning nuts. The upper cover 1 is provided with multiple positioning grooves 13 surrounding the opening of the discharge pipe 12. The top of the inner shell 3 is provided with multiple positioning blocks 35 matching the positioning grooves 13. By connecting the upper cover of the front and rear equipment and cooperating with the lower cover that can be quickly disassembled, inspected and replaced, the equipment can be quickly disassembled, inspected and replaced, and the damaged inner shell can be quickly replaced, reducing equipment maintenance costs and maintenance downtime.

[0019] Specifically, the lower cover 2 is provided with a conical support groove 22 for supporting the inner shell 3; the inner shell 3 is detachably installed in the support groove 22; the inner shell 3 includes an upper shell 31 that is close to the inner wall of the upper cover 1, a conical lower shell 33 that is close to the inner wall of the support groove 22, and a middle shell 32 connecting the upper shell 31 and the lower shell 33; an outlet 34 is provided on the middle shell 32; the side wall of the upper shell 31 is provided with an inlet 311 that connects to the feed pipe 11 and an outlet 312 that connects to the discharge pipe 12. By detachably installing the inner shell in the lower cover, the cost of replacing worn parts is further reduced, and the conical upper and lower shells ensure a smooth and high-speed flow of internal airflow, ensuring high-speed collision of internal materials and ensuring crushing efficiency.

[0020] Specifically, the support groove 22 is provided with a rubber support surface that supports the lower shell 33.

[0021] Specifically, the inner wall of the inner shell 3 is provided with an arc-shaped guiding surface that guides the connection between the upper shell 31 and the middle shell 32, and guides the connection between the lower shell 33 and the middle shell 32.

[0022] Specifically, the upper cover 1 is provided with a conical hopper 15 whose cross-section gradually decreases along the direction close to the discharge pipe 12.

[0023] Specifically, the hopper 15 is equipped with a deceleration device 5 that connects to the inner cavity of the inner shell 3. The deceleration device 5 includes multiple nozzles 51 connected to the inner cavity of the inner shell 3 and equipped with pulse valves, an air ring 52 connecting the multiple nozzles 51, and a through pipe 53 connecting the air ring 52 and the ring pipe 4. By setting up the deceleration device, the internal material is temporarily impacted and decelerated, deflecting part of the material's movement direction, increasing the probability of collision of material particles, and effectively increasing the crushing efficiency.

[0024] Specifically, the inner shell 3 is made of wear-resistant ceramic material.

[0025] Working Principle: The operator installs the crushing device according to the crushing structure disclosed in Chinese patent document CN118320955B. Material enters the inner cavity of the inner shell 3 through the feed pipe 11. Guided by the ring pipe 4 connected to the high-pressure air source, a high-pressure spiral airflow is formed inside the inner shell 3. The new material entering from the feed pipe 11 collides at high speed with the material inside the inner shell 3, causing it to be crushed. Driven by the spiral airflow, it is discharged from the top discharge pipe 12 to the subsequent equipment. During material crushing, multiple nozzles 51 with pulse valves of the deceleration device 5 alternately open and close. The open nozzles 51 tilt downwards to impact the material in the spiral airflow, decelerating the material in some areas. Meanwhile, the airflow velocity in nozzle 41 temporarily decreases slightly before returning to its original speed, temporarily slowing down the high-speed rotating material and effectively increasing the probability of material particles contacting and colliding. When maintenance is required, it is not necessary to disassemble the connection between the equipment and the air source and feed pipe. Instead, the positioning nut on the guide groove 14 is directly removed, the lower cover 2 is removed, and the inner shell 3 is replaced. The new inner shell 3, supported by the lower cover 2, ensures the stability of the position of the flow port 41 on the inner shell 3 through the cooperation of the positioning block 35 and the positioning groove 13, ensuring the continuous maintenance of the internal airflow direction. This allows for quick maintenance of the crushing equipment, effectively reducing equipment maintenance costs and the workload of maintenance personnel.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An ultrafine pulverizing device for the production of powder injections, comprising an upper cover (1) connecting a feed pipe (11) and a discharge pipe (12), and a lower cover (2) detachably connected to the upper cover (1), characterized in that: It also includes an inner shell (3) disposed on the lower cover (2) and closely attached to the inner wall of the upper cover (1); the outer wall of the upper cover (1) is provided with a ring pipe (4) connecting to an external high-pressure gas source; the ring pipe (4) is provided with multiple nozzles (41) connecting to the inner cavity of the inner shell (3); the multiple nozzles (41) are inclined in the same direction; the side wall of the inner shell (3) is provided with multiple flow ports (34) matching the nozzles (41); the side of the lower cover (2) The wall is provided with a plurality of spaced positioning plates (21); the side wall of the upper cover (1) is provided with a guide groove (14) for inserting the positioning plates (21); both the guide groove (14) and the positioning plates (21) are provided with positioning holes for installing positioning nuts; the upper cover (1) is provided with a plurality of positioning grooves (13) surrounding the opening of the discharge pipe (12); the top of the inner shell (3) is provided with a plurality of positioning blocks (35) that match the positioning grooves (13).

2. The ultrafine pulverizing device for powder injection production according to claim 1, characterized in that: The lower cover (2) is provided with a conical support groove (22) for supporting the inner shell (3); the inner shell (3) is detachably installed in the support groove (22); the inner shell (3) includes an upper shell (31) that is close to the inner wall of the upper cover (1), a conical lower shell (33) that is close to the inner wall of the support groove (22), and a middle shell (32) that connects the upper shell (31) and the lower shell (33); the overflow port (34) is provided on the middle shell (32); the side wall of the upper shell (31) is provided with an inlet (311) that connects to the feed pipe (11) and an outlet (312) that connects to the discharge pipe (12).

3. The ultrafine pulverizing device for powder injection production according to claim 2, characterized in that: The support groove (22) is provided with a rubber support surface that supports the lower shell (33).

4. The ultrafine pulverizing device for powder injection production according to claim 2, characterized in that: The inner wall of the inner shell (3) is provided with an arc-shaped guiding surface that guides the connection between the upper shell (31) and the middle shell (32) and the lower shell (33) and the middle shell (32).

5. The ultrafine pulverizing device for powder injection production according to claim 1, characterized in that: The upper cover (1) is provided with a conical hopper (15) whose cross-section gradually decreases along the direction close to the discharge pipe (12).

6. The ultrafine pulverizing device for powder injection production according to claim 5, characterized in that: The hopper (15) is provided with a deceleration device (5) that communicates with the inner cavity of the inner shell (3); the deceleration device (5) includes a plurality of nozzles (51) that communicate with the inner cavity of the inner shell (3) and are equipped with pulse valves, an air ring (52) that communicates with the plurality of nozzles (51), and a through pipe (53) that communicates with the air ring (52) and the ring pipe (4).

7. The ultrafine pulverizing device for powder injection production according to claim 1, characterized in that: The inner shell (3) is made of wear-resistant ceramic material.

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