An anti-adhesion mechanism for a sterile pulverizer

Abstract

An anti-adhesion mechanism for a sterile pulverizer includes a housing, a driving device, a transmission output device, and a self-lubricating structure. The housing includes a connecting tube, an annular cavity embedded on the circumferential outer side of the connecting tube and connected to the inside of the connecting tube, and a transmission sealing structure arranged between the connecting tube and the annular cavity. The transmission output device includes a driving gear arranged in the annular cavity and connected to the driving device, a driven gear ring arranged in the annular cavity and concentrically arranged with the connecting tube, and a scraper fixed on the inner side of the driven gear ring along the axial direction of the connecting tube. The anti-adhesion mechanism for a sterile pulverizer has a strong structural integrity and good sealing performance. Through the accurate fixed installation of the driven gear ring, the scraper can accurately rotate with the center of the connecting tube as the axis to scrape off the adhered materials on the inner wall of the connecting tube, and the scraping efficiency is high.

Description

Technical Field

[0001] The invention belongs to the technical field of pulverizer equipment, in particular to an anti-adhesion mechanism for a sterile pulverizer. Background Art

[0002] The pulverization of medicinal materials generally adopts pulverizing equipment. In the production of medicines, due to the increasingly high requirements for production cleanliness, the production of many medicines involves the aseptic environment requirements of the entire production system.

[0003] At present, the existing pulverizing equipment on the market generally includes a feed hopper, a material-dispensing device, and a pulverizing device, and the devices are sealed and connected through connecting pipes. When the drug powder enters the pulverizing device from the material-dispensing device, the powder easily adheres to the inner wall of the pipe due to the electrostatic adsorption of the powdered material. When the pulverizing equipment operates for a long time, and the powders attract each other, a thick material layer is eventually formed in the pipe, blocking the pipe between the material-dispensing device and the pulverizing device, resulting in poor feeding.

[0004] In addition, the existing scraping device has poor aseptic performance and poor installation and positioning structure, which easily leads to wear between the scraping device and the pulverizing equipment, cannot meet the requirements of aseptic production, and cannot be directly applied to aseptic pulverizers. Summary of the invention

[0005] In view of this, the present invention provides an anti-adhesion mechanism for a sterile pulverizer to solve the above problems.

[0006] An anti-adhesion mechanism for a sterile pulverizer includes a housing, a driving device, a transmission output device, and a self-lubricating structure. The housing includes a connecting pipe, an annular cavity embedded in the circumferential outer side of the connecting pipe and communicating with the inside of the connecting pipe, and a transmission sealing structure arranged between the connecting pipe and the annular cavity. The transmission output device includes a driving gear arranged in the annular cavity and connected to the driving device, a driven gear ring arranged in the annular cavity and concentrically arranged with the connecting pipe, and a scraper fixed to the inner side of the driven gear ring along the axial direction of the connecting pipe, the inner side of the driven gear ring radially protruding inwardly from the inner wall of the connecting pipe and one side of the scraper is attached to the inner wall of the connecting pipe. The self-lubricating structure includes an annular groove arranged at the upper end of the driven gear ring, an annular convex portion arranged at the lower end of the driven gear ring, an upper wear-resistant block embedded in the annular groove, and a lower wear-resistant block embedded in the bottom of the annular cavity and having an L-shaped cross section. The upper end of the upper wear-resistant block protrudes from the annular groove and abuts against the upper end of the inner part of the annular cavity. The annular protrusion is sleeved on the outer side of the lower wear-resistant block and the inner wall of the annular protrusion abuts against the outer wall of the lower wear-resistant block.

[0007] Furthermore, the transmission sealing structure includes an annular sealing groove arranged in the annular cavity near one end of the connecting pipe, an upper double-lip sealing ring arranged in the annular sealing groove and abutting against the upper end of the driven gear ring, and a lower double-lip sealing ring arranged in the annular sealing groove and abutting against the lower end of the driven gear ring.

[0008] Furthermore, the driving device includes an outer cover arranged on the annular cavity and communicated with the inside of the annular cavity, and a driving motor arranged in the outer cover and connected to the driving gear.

[0009] Furthermore, the annular cavity includes an annular base with an L-shaped cross-section, an upper cover arranged on the annular base, an annular boss arranged at the bottom of the upper cover, and an annular sealing ring arranged between the annular boss and the annular base. When the upper cover is overlapped on the annular base, the outer wall of the annular boss abuts against the inner wall of the annular base, and the annular sealing ring is squeezed between the upper end of the annular base and the annular boss.

[0010] Furthermore, an L-shaped clearance groove is provided at the inner corner of the lower wear-resistant block, and the annular protrusion close to the corner of the lower wear-resistant block is inserted into the L-shaped clearance groove and a gap is always maintained between the annular protrusion and the inner wall of the L-shaped clearance groove.

[0011] Furthermore, the scraper is in the shape of an elongated strip and is attached to the inner wall of the connecting pipe along the axial direction of the connecting pipe.

[0012] Furthermore, the driven gear ring, the annular groove, the annular protrusion and the scraper are an integrated structure.

[0013] Furthermore, the two ends of the connecting pipe are respectively connected to a material-dispensing device and a crushing device through a clamp sealing structure. The connecting pipe includes an upper connecting pipe and a lower connecting pipe which are arranged at intervals and correspond to each other, the upper connecting pipe is connected to the material-dispensing device, and the lower connecting pipe is connected to the crushing device.

[0014] Furthermore, the clamp sealing structure includes a connecting flange 1 respectively arranged at both ends of the connecting pipe, a connecting flange 2 respectively arranged on the material discharging device and the crushing device and corresponding to the connecting flange 1, a sealing ring arranged between the connecting flange 1 and the connecting flange 2, and a clamp member which is sleeved on the outside of the connecting flange 1 and the connecting flange 2 and forces the connecting flange 1 and the connecting flange 2 to be in force-fitting contact.

[0015] Furthermore, two ends of the scraper respectively exceed two ends of the connecting pipe and extend into the material-dispensing device and the crushing device respectively.

[0016] Compared with the prior art, the anti-adhesion mechanism for a sterile pulverizer provided by the present invention enhances the structural integrity through multiple integrated structures, avoids problems such as material residue and bacterial growth caused by gaps between structures, and can also achieve axial and radial limitation of the driven gear ring through the cooperation of the self-lubricating structure and the annular cavity, which is convenient for the fixed installation of the driven gear ring, so that the scraper can accurately rotate around the center of the connecting pipe as the axis to scrape off the material adhered to the inner wall of the connecting pipe. In addition, the transmission sealing structure realizes bidirectional dynamic sealing of the driven gear ring on both sides of the transmission sealing structure, further increasing the sealing of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention provides a schematic structural diagram of a sterile pulverizer.

[0018] Figure 2 for Figure 1 Schematic cross-sectional view of a sterile pulverizer.

[0019] Figure 3 for Figure 2 Schematic diagram of the local enlarged structure at point A in the middle.

[0020] Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure of an anti-adhesion mechanism for a sterile pulverizer. DETAILED DESCRIPTION

[0021] The specific embodiments of the present invention are further described in detail below. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

[0022] See also Figures 1 to 4 , which is a schematic diagram of the structure of an anti-adhesion mechanism for a sterile pulverizer provided by the present invention. An anti-adhesion mechanism for a sterile pulverizer includes a housing 10, a driving device 20, a transmission output device 30, and a self-lubricating structure 40. It can be imagined that the anti-adhesion mechanism for a sterile pulverizer also includes other functional components and specific structures, such as a power supply component, a sealing component, and a mounting structure, etc., which are all well-known technologies to those skilled in the art, so they will not be described in detail one by one here.

[0023] The housing 10 includes a connecting pipe 11, an annular cavity 12 embedded in the outer circumferential side of the connecting pipe 11 and communicating with the inside of the connecting pipe 11, and a transmission sealing structure 13 arranged between the connecting pipe 11 and the annular cavity 12. The two ends of the connecting pipe 11 are respectively connected to a material-dispensing device 50 and a pulverizing device 60 through a clamp sealing structure 14. The connecting pipe 11 includes an upper pipe 111 and a lower pipe 112 arranged at intervals, the upper pipe 111 is connected to the material-dispensing device 50, and the lower pipe 112 is connected to the pulverizing device 60. The material conveying of the anti-adhesion mechanism for the sterile pulverizer passes through the material-dispensing device 50, the upper pipe 111, the annular cavity 12, the lower pipe 112 and the pulverizing device 60 in sequence. The clamp seal structure 14 includes a connection flange 141 respectively arranged at both ends of the connection pipe 11, a connection flange 142 respectively arranged on the material-dispensing device 50 and the crushing device 60 and corresponding to the connection flange 141, a connection seal ring 143 arranged between the connection flange 141 and the connection flange 142, and a clamp member 144 sleeved on the outside of the connection flange 141 and the connection flange 142 and forcing the connection flange 141 and the connection flange 142 to be in contact with each other. The two ends of the connection pipe 11 are respectively connected to the material-dispensing device 50 and the crushing device 60 to form a flange connection through the clamp seal structure 14, and the connection seal ring 143 is squeezed between the connection flange 141 and the connection flange 142 to form a sealing structure, which is convenient for disassembly and assembly. The clamp member 144 includes two arc blocks with one end connected by hinge and a U-shaped cross section, and a fastening structure penetrating the ends of the two arc blocks away from the hinge point. It is a conventional setting in the technical field, so it will not be described here.

[0024] The annular cavity 12 includes an annular base 121 with an L-shaped cross section, an upper cover 122 arranged on the annular base 121, an annular boss 123 arranged at the bottom of the upper cover 122, and an annular sealing ring 124 arranged between the annular boss 123 and the annular base 121. In this embodiment, in order to ensure the overall sealing of the shell 10, the upper cover 122 is connected to the upper pipe 111 by welding, and the annular base 121 is connected to the lower pipe 112 by welding. When the upper cover 122 is overlapped on the annular base 121, the outer wall of the annular boss 123 abuts against the inner wall of the annular base 121, and the annular sealing ring is squeezed between the upper end of the annular base 121 and the annular boss 123. The transmission sealing structure 13 will be specifically described in conjunction with the following drive device 20 and transmission output device 30.

[0025] The driving device 20 includes an outer cover 21 disposed on the annular cavity 12 and communicating with the inside of the annular cavity 12, and a driving motor 22 disposed in the outer cover 21 and connected to the driving gear 31. The driving device 20 provides power for the transmission output device 30, the outer cover 21 is sealedly connected to the annular cavity 12, one end of the driving motor 22 rests on the annular cavity 12, and one end of the output shaft of the driving motor 22 passes through the annular cavity 12 and is connected to the transmission output device 30.

[0026] The transmission output device 30 includes a driving gear 31 disposed in the annular cavity 12 and connected to the driving device 20, a driven gear ring 32 disposed in the annular cavity 12 and concentrically disposed with the connecting tube 11, and a scraper 33 fixed to the inner side of the driven gear ring 32 along the axial direction of the connecting tube 11, the inner side of the driven gear ring 32 radially protrudes inwardly from the inner wall of the connecting tube 11 and one side of the scraper 33 is attached to the inner wall of the connecting tube 11. The driving device 20 drives the driving gear 31 to rotate, driving the driven gear ring 32 to rotate, so that the scraper 33 rotates and scrapes the material with the center of the connecting tube 11 as the axis and against the inner wall of the connecting tube 11, scraping off the powder adhering to the inner wall of the connecting tube 11, and ensuring the continuous feeding of the device. The two ends of the scraper 33 respectively exceed the two ends of the connecting tube 11 and extend into the material-pickup device 50 and the crushing device 60 respectively. The scraper 33 is in an elongated shape and is attached to the inner wall of the connecting tube 11 along the axial direction of the connecting tube 11. The elongated scraper 33 can increase the passability of the material from the material-dispensing device 50 to the crushing device 60, reserve a larger space for the material to pass, and completely scrape off the adhered powder on the inner wall of the connecting tube 11.

[0027] The self-lubricating structure 40 includes an annular groove 41 disposed at the upper end of the driven gear ring 32, an annular protrusion 42 disposed at the lower end of the driven gear ring 32, an upper wear-resistant block 43 embedded in the annular groove 41, and a lower wear-resistant block 44 embedded in the bottom of the annular cavity 12 and having an L-shaped cross-section. The driven gear ring 32, the annular groove 41, the annular protrusion 42 and the scraper 33 are an integrated structure. The integrated structure can reduce the gap between the driven gear ring 32, the annular groove 41, the annular protrusion 42 and the scraper 33, and avoid material powder residue and bacterial growth. In this embodiment, in order to ensure the aseptic sealing and cleanliness in the annular cavity 12, it is selected to reduce the use of mechanical transmission lubricating oil, and the upper wear-resistant block 43 and the lower wear-resistant block 44 are both made of self-lubricating copper blocks. It can be imagined that when the driven gear ring 32 is installed in the annular cavity 12, the upper end of the upper wear-resistant block 43 protrudes from the annular groove 41 and abuts against the upper end of the inner part of the annular cavity 12, and the lower end of the driven gear ring 32 rests on the lower wear-resistant block 44, that is, the axial limit of the driven gear ring 32 in the annular cavity 12 is formed. The annular protrusion 42 is sleeved on the outer side of the lower wear-resistant block 44 and the inner wall of the annular protrusion 42 abuts against the outer wall of the lower wear-resistant block 44, and the outer side of the driven gear ring 32 is meshed and connected with the driving gear 31, that is, the radial limit of the driven gear ring 32 is formed. The upper wear-resistant block 43 rotates with the driven gear ring 32 and is relatively dynamic with the annular cavity 12, that is, the upper wear-resistant block 43 and the inner wall of the upper end of the annular cavity 12 rotate relatively, and the lower wear-resistant block 44 and the annular cavity 12 are relatively static, that is, the lower wear-resistant block 44 and the driven gear ring 32 rotate relatively. The self-lubricating structure 40 realizes the accurate positioning and installation of the driven gear ring 32 in the annular cavity 12, so that the scraper 33 can stably rotate around the center of the connecting tube 11 and rotate in close contact with the inner wall of the connecting tube 11, avoiding friction between the scraper 33 and the inner wall and causing wear of the inner wall.

[0028] The transmission sealing structure 13 includes an annular sealing groove 131 disposed at one end of the annular cavity 12 close to the connecting pipe 11, an upper double-lip sealing ring 132 disposed in the annular sealing groove 131 and abutting against the upper end of the driven gear ring 32, and a lower double-lip sealing ring 133 disposed in the annular sealing groove 131 and abutting against the lower end of the driven gear ring 32. Through the cooperation of the upper double-lip sealing ring 132 and the lower double-lip sealing ring 133, the driven gear ring 32 is located on both sides of the transmission sealing structure 13 to form a bidirectional seal, so that the material powder will not enter the transmission output device 30 when passing through the connecting pipe 11, and the fine dust generated by the transmission output device 30 will not enter the connecting pipe 11. Through the transmission sealing structure 13, a dynamic seal can be formed on both sides of the driven gear ring 32 when the driven gear ring 32 rotates to scrape the material.

[0029] An L-shaped clearance groove 45 is provided at the inner corner of the lower wear-resistant block 44, and the annular protrusion 42 near the corner of the lower wear-resistant block 44 is inserted into the L-shaped clearance groove 45, and the annular protrusion 42 always maintains a gap with the inner wall of the L-shaped clearance groove 45. The L-shaped clearance groove 45 is used as a tool withdrawal groove, which is convenient for lathe processing of the inner corner of the lower wear-resistant block 44, and also allows the annular protrusion 42 near the corner of the lower wear-resistant block 44 to be inserted into the L-shaped clearance groove 45, so that the annular protrusion 42 can fit the contact surface of the lower wear-resistant block 44 more closely, reducing the overall processing technology, and also reducing the contact area between the annular protrusion 42 and the lower wear-resistant block 44, and reducing the wear between the driven gear ring 32 and the lower wear-resistant block 44 when the driven gear ring 32 rotates.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention is included in the scope of the claims of the present invention.

Claims

1. An anti-adhesion mechanism for a sterile pulverizer, characterized in that: The anti-adhesion mechanism for the aseptic pulverizer includes a housing, a driving device, a transmission output device, and a self-lubricating structure. The housing includes a connecting pipe, an annular cavity embedded in the outer circumferential side of the connecting pipe and communicating with the inside of the connecting pipe, and a transmission sealing structure arranged between the connecting pipe and the annular cavity. The transmission output device includes a driving gear arranged in the annular cavity and connected to the driving device, a driven gear ring arranged in the annular cavity and concentrically arranged with the connecting pipe, and a A scraper is fixed to the inner side of the driven gear ring along the axial direction of the connecting tube, the inner side of the driven gear ring radially protrudes inwardly from the inner wall of the connecting tube and one side of the scraper is attached to the inner wall of the connecting tube, the self-lubricating structure includes an annular groove arranged at the upper end of the driven gear ring, an annular convex portion arranged at the lower end of the driven gear ring, an upper wear-resistant block embedded in the annular groove, and a lower wear-resistant block embedded in the bottom of the annular cavity and having an L-shaped cross-section, the upper end of the upper wear-resistant block protrudes from the annular groove and abuts against the inside of the annular cavity The upper end, the annular convex portion is sleeved on the outer side of the lower wear-resistant block and the inner wall of the annular convex portion abuts against the outer wall of the lower wear-resistant block. The driven gear ring, the annular groove, the annular convex portion and the scraper are an integrated structure. The transmission sealing structure includes an annular sealing groove arranged in the annular cavity near one end of the connecting pipe, an upper double-lip sealing ring arranged in the annular sealing groove and abutting against the upper end of the driven gear ring, and a lower double-lip sealing ring arranged in the annular sealing groove and abutting against the lower end of the driven gear ring. The driving device includes a ring arranged in the annular cavity An outer cover is disposed on the body and communicated with the inside of the annular cavity, a driving motor is disposed in the outer cover and connected to the driving gear, the annular cavity comprises an annular base with an L-shaped cross section, an upper cover disposed on the annular base, an annular boss disposed at the bottom of the upper cover, and an annular sealing ring disposed between the annular boss and the annular base, when the upper cover is overlapped on the annular base, the outer wall of the annular boss abuts against the inner wall of the annular base, and the annular sealing ring is squeezed between the upper end of the annular base and the annular boss.

2. The anti-adhesion mechanism for a sterile pulverizer according to claim 1, characterized in that: An L-shaped clearance groove is arranged at the inner corner of the lower wear-resistant block, and the annular protrusion is inserted into the L-shaped clearance groove near the corner of the lower wear-resistant block, and a gap is always maintained between the annular protrusion and the inner wall of the L-shaped clearance groove.

3. The anti-adhesion mechanism for a sterile pulverizer according to claim 1, characterized in that: The scraper is in the shape of an elongated strip and is attached to the inner wall of the connecting pipe along the axial direction of the connecting pipe.

4. The anti-adhesion mechanism for a sterile pulverizer according to claim 1, characterized in that: The two ends of the connecting pipe are respectively connected to a material-dispensing device and a crushing device through a clamp sealing structure. The connecting pipe includes an upper connecting pipe and a lower connecting pipe which are arranged at corresponding intervals. The upper connecting pipe is connected to the material-dispensing device, and the lower connecting pipe is connected to the crushing device.

5. The anti-adhesion mechanism for a sterile pulverizer according to claim 4, characterized in that: The clamp sealing structure includes a connecting flange 1 respectively arranged at both ends of the connecting pipe, a connecting flange 2 respectively arranged on the material discharging device and the crushing device and corresponding to the connecting flange 1, a sealing ring arranged between the connecting flange 1 and the connecting flange 2, and a clamp member which is sleeved on the outside of the connecting flange 1 and the connecting flange 2 and forces the connecting flange 1 and the connecting flange 2 to be in close contact with each other.

6. The anti-adhesion mechanism for a sterile pulverizer according to claim 4, characterized in that: The two ends of the scraper respectively exceed the two ends of the connecting pipe and extend into the material-dispensing device and the crushing device respectively.

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