A device for preparing a biocompatible coating of a chitosan antibacterial dressing

Abstract

This invention discloses a biocompatible coating preparation device for chitosan antibacterial dressings, comprising a mixing cylinder, a filter cylinder fixedly connected to the inner side of the mixing cylinder, a discharge cylinder slidably connected to the inner side of the filter cylinder, and a mixing component disposed inside the mixing cylinder, which includes several fixed cylinders arranged in a circumferential array, several stirring cylinders rotatably arranged at equal intervals on the fixed cylinders, and several vibrating cylinders fixedly connected in a spiral equidistant array on the stirring cylinders; a cleaning component disposed inside the discharge cylinder, which includes a rotatable mixing drive shaft, several sealing cylinders fixedly connected in a spiral equidistant array on the outer side of the mixing drive shaft, and a short scraper slidably disposed inside the sealing cylinder. In this invention, the stirring cylinder efficiently mixes the material through the mixing component, while vibration effectively eliminates air bubbles, ensuring the density of the slurry; and the contact force between the short scraper and the inner wall of the filter cylinder can be flexibly adjusted according to the viscosity of the chitosan adhesive, adapting to adhesives of different viscosities and preventing high-viscosity adhesives from clogging the filter.

Description

Technical Field

[0001] This invention relates to the field of medical dressing production equipment technology, and in particular to a device for preparing a biocompatible coating for chitosan antibacterial dressings. Background Technology

[0002] The core component of chitosan antibacterial dressings is the chitosan dressing block, which is widely used in the preparation of antibacterial dressings due to its excellent biocompatibility, antibacterial properties, and wound-healing effects. In the production process of chitosan antibacterial dressings, chitosan is mixed with other functional raw materials in a certain proportion, and an appropriate amount of water is added to prepare a uniform adhesive solution. This solution is then transferred to a substrate using coating equipment to form a biocompatible coating.

[0003] Existing mixing devices mostly employ a single stirring method, resulting in low stirring efficiency and uneven material mixing. Furthermore, high-speed stirring easily introduces numerous air bubbles into the adhesive solution, leading to decreased density of the coating slurry and affecting the film-forming quality and antibacterial effect of the adhesive. Although some devices incorporate vibration defoaming structures, the defoaming frequency and effectiveness are limited, making it difficult to completely eliminate micro-bubbles in high-viscosity adhesive solutions. Additionally, existing devices typically use filters to remove undissolved large particles during mixing; however, these large particles easily become trapped in the filter gaps during prolonged mixing, causing blockages. The lack of an effective self-cleaning mechanism for the filters further reduces their permeability, affecting discharge efficiency and adhesive quality, necessitating frequent shutdowns for cleaning. Therefore, to address these issues, a biocompatible coating preparation device for chitosan antibacterial adhesive dressings is proposed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a biocompatible coating preparation device for chitosan antibacterial dressings.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A biocompatible coating preparation device for chitosan antibacterial dressings includes a mixing cylinder, a filter cylinder fixedly connected to the inner side of the mixing cylinder, a discharge cylinder slidably connected to the inner side of the filter cylinder, a mixing assembly disposed inside the mixing cylinder, the mixing assembly including a plurality of fixed cylinders arranged in a circumferential array, a plurality of stirring cylinders rotatably disposed at equal intervals on the fixed cylinders, a mixing spiral roller fixedly connected to the outer side of the stirring cylinders, a plurality of vibrating cylinders fixedly connected in a spiral equidistant array on the stirring cylinders, and a plurality of vibrating cams equidistantly disposed inside the vibrating cylinders. The stirring cylinders and the mixing spiral rollers are used to stir the materials, and the vibration cams rotate to generate vibration to eliminate air bubbles. A scraping component is provided on the side of the fixed cylinder near the filter cylinder, and the scraping component is used to clean the blockage on the outside of the filter cylinder; A cleaning assembly is provided on the inner side of the discharge cylinder. The cleaning assembly includes a rotatable mixing drive shaft. Several sealing cylinders are fixedly connected to the outer side of the mixing drive shaft in a spiral equidistant array. Short scrapers are slidably arranged on the inner side of the sealing cylinders. The contact force between the short scrapers and the filter cylinder is adjustable.

[0006] The above technical solution further includes: The mixing cylinder has a base at its bottom, and several hydraulic cylinders are installed at equal intervals between the mixing cylinder and the base. A discharge pipe is fixedly connected to the inner side of the base and is fixedly connected to the bottom of the discharge cylinder. A feed inlet is fixedly installed at the top of the mixing cylinder. A first support plate and a second support plate are fixedly connected to the top inner side of the mixing cylinder. A rotating plate is rotatably connected to the inner side of the second support plate. A support ring is fixedly connected to the bottom of the rotating plate. A filter cylinder is fixedly connected between the support ring and the mixing cylinder. The discharge cylinder is slidably connected to the bottom of the mixing cylinder and its top is embedded inside the support ring. A spiral extrusion roller is rotatably installed on the inner side of the discharge cylinder.

[0007] The mixing assembly also includes a mixing motor fixedly mounted on the top of the mixing cylinder. A bearing bracket is fixedly connected to the top of the mixing cylinder. The mixing motor is fixedly mounted on one side of the bearing bracket. A driving bevel gear is fixedly connected to the output end of the mixing motor. A driven bevel gear is meshed with the outer side of the driving bevel gear. The driven bevel gear is fixed to the outer side of the mixing drive shaft. The mixing drive shaft is rotatably connected to the mixing cylinder and the bearing bracket. The mixing drive shaft is fixedly connected to the rotating plate. The fixed cylinder is fixedly connected to the inner side of the rotating plate.

[0008] A mixing gear ring is fixedly connected to the inner side of the first support plate. Several mixing gears are meshed in a circular array on the inner side of the mixing gear ring. A mixing drive shaft is fixedly connected to the inner side of the mixing gears. Several mixing bevel gears are fixedly connected at equal intervals on the inner side of the mixing drive shaft extending to the inner side of the fixed cylinder. A stirring bevel gear is meshed with the bottom of the mixing bevel gear. A vibration transmission shaft is fixedly connected to the inner side of the stirring bevel gear. The vibration transmission shaft is rotatably connected to the inner side of the stirring cylinder. A second bushing is rotatably connected to the outer side of the vibration transmission shaft. The second bushing is fixedly connected to the fixed cylinder.

[0009] A plurality of first bushings are fixedly connected at equal intervals on the outer side of the fixed cylinder. The stirring cylinder is rotatably connected to the inner side of the first bushings. A plurality of annular slide rails are fixedly connected at equal intervals on the inner side wall of the mixing cylinder. A mixing bevel gear ring is fixedly connected to the inner side of the annular slide rail. A sealing slip ring is slidably connected to the inner side of the annular slide rail. A mixing bevel gear is fixedly connected to one end of the stirring cylinder extending to the inner side of the annular slide rail. The mixing bevel gear meshes with the mixing bevel gear ring. The sealing slip ring is rotatably connected to the other end of the stirring cylinder.

[0010] Several vibrating bevel gears are fixedly connected at equal intervals to the outer side of the vibrating drive shaft. Vibrating bevel gears are meshed with the outer side of the vibrating bevel gears, and the several vibrating bevel gears are arranged in a spiral array at equal intervals. A vibrating driven shaft is fixedly connected to the inner side of the vibrating bevel gears, and the vibrating driven shaft is rotatably connected to the stirring cylinder. The vibrating driven shaft is rotatably connected to the vibrating cylinder, and the vibrating driven shaft is fixedly connected to several vibrating cams. Several vibrating rods are fixedly connected at equal intervals to the outer side of the vibrating cylinder in a spiral array.

[0011] Several fixing rods are fixedly connected at equal intervals on the side of the fixing cylinder near the first bushing, and several ring rods are fixedly connected at equal intervals between the fixing rods located at different heights in two adjacent fixing cylinders.

[0012] The scraping assembly includes a scraping cylinder, which is fixedly connected to the side of the fixed cylinder away from the first bushing. A plurality of damping rods are equidistantly arranged on the inner side of the scraping cylinder. The damping rods are fixedly connected to the fixed cylinder. A second spring is fixedly connected to the fixed end of the damping rod. The telescopic end of the damping rod and the second spring are fixedly connected to a scraping column plate. The scraping column plate is slidably connected to the scraping cylinder. A long scraper is fixedly connected to one end of the plurality of scraping column plates extending to the outside of the scraping cylinder. The long scraper is in contact with the outer wall of the filter cylinder.

[0013] The cleaning assembly also includes a cleaning motor fixedly installed on the top of the mixing drum. The output end of the cleaning motor is fixedly connected to a cleaning drive shaft. The cleaning drive shaft is rotatably connected to the mixing drive shaft. Several cleaning bevel gears are fixedly connected at equal intervals on the outer side of the portion of the cleaning drive shaft extending to the inner side of the mixing drive shaft. Cleaning bevel gears are meshed on the outer side of the cleaning bevel gears. The cleaning bevel gears are distributed in a spiral array at equal intervals.

[0014] A cleaning reciprocating screw is fixedly connected to the inner side of the cleaning bevel gear. The cleaning reciprocating screw is rotatably connected to the mixing drive shaft. A limit cylinder is provided on the inner side of the sealing cylinder, and the limit cylinder is fixedly connected to the mixing drive shaft. A threaded cylinder is provided on the inner side of the limit cylinder for limiting sliding. The threaded cylinder is threadedly connected to the cleaning reciprocating screw. A first spring is fixedly connected to the end of the threaded cylinder. A cleaning column plate is fixedly connected to the other end of the first spring. The cleaning column plate is slidably connected to the sealing cylinder. The other end of the cleaning column plate is fixedly connected to the short scraper.

[0015] The present invention has the following beneficial effects: 1. In this invention, the stirring drum rotates on its own axis while revolving around the central axis, and the mixing spiral roller can both revolve and rotate to stir, forming a compound motion that greatly improves the mixing efficiency. At the same time, the vibrating cam rotates at high speed in the vibrating drum to generate high-frequency mechanical vibration, which is transmitted to the surrounding materials through the vibrating rod, effectively breaking up and eliminating air bubbles and ensuring the density of the coating slurry.

[0016] 2. In this invention, the contact force between the short scraper and the inner wall of the filter cylinder can be flexibly adjusted according to the viscosity of the chitosan adhesive. When the viscosity is low, light pressure is applied to scrape off the material. When the viscosity is high, the contact force is increased and a periodic reciprocating shearing and peeling action is generated, which reduces the discharge resistance, adapts to adhesives of different viscosities, and prevents high-viscosity adhesives from clogging the filter. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the first overall structure of a biocompatible coating preparation device for chitosan antibacterial dressings proposed in this invention. Figure 2 This is a schematic diagram of the internal structure of the mixing cylinder in this invention; Figure 3 This is a schematic diagram of the first structure of the hybrid component in this invention; Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 for Figure 3 Enlarged schematic diagram of the structure at point B; Figure 6 This is a schematic diagram of the second structure of the hybrid component in this invention; Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point C; Figure 8 for Figure 6 Enlarged schematic diagram of the structure at point D; Figure 9 This is a schematic diagram of the cleaning component structure in this invention; Figure 10 for Figure 9 Enlarged schematic diagram of the structure at point E in the middle.

[0018] In the diagram: 1. Mixing cylinder; 2. Cleaning motor; 3. Mixing motor; 4. Scraper cylinder; 10. Base; 11. Hydraulic cylinder; 12. Feed inlet; 13. Bearing bracket; 14. Discharge pipe; 15. First support plate; 16. Second support plate; 17. Spiral extrusion roller; 18. Support ring; 19. Discharge cylinder; 110. Filter cylinder; 20. Cleaning drive shaft; 21. Cleaning bevel gear disc; 22. Cleaning bevel gear; 23. Cleaning reciprocating screw; 24. Sealing cylinder; 25. Limiting cylinder; 26. First spring; 27. Cleaning column plate; 28. Threaded cylinder; 29. ​​Short scraper; 30. Driving bevel gear; 31. Driven bevel gear; 32. Fixed cylinder; 33. Fixed rod; 34. Ring rod 35. Mixing drive shaft; 36. Annular slide rail; 360. Sealing slip ring; 361. Mixing bevel gear ring; 362. Mixing bevel gear; 37. Stirring drum; 38. Mixing spiral roller; 39. Rotating plate; 310. Mixing gear; 390. Mixing gear ring; 311. Mixing drive shaft; 312. First bushing; 313. Vibrating drum; 314. Vibrating drive shaft; 315. Mixing bevel gear disc; 316. Stirring bevel gear; 317. Second bushing; 318. Vibrating bevel gear disc; 319. Vibrating bevel gear; 320. Vibrating cam; 321. Vibrating rod; 322. Vibrating driven shaft; 40. Long scraper; 41. Damping rod; 42. Scraper column plate; 43. Second spring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1

[0021] like Figures 1-10 As shown, the present invention proposes a biocompatible coating preparation device for chitosan antibacterial dressings, comprising a mixing cylinder 1, a filter cylinder 110 fixedly connected to the inner side of the mixing cylinder 1, a discharge cylinder 19 slidably connected to the inner side of the filter cylinder 110, a mixing component disposed inside the mixing cylinder 1, the mixing component comprising a plurality of fixed cylinders 32 arranged in a circumferential array, a plurality of stirring cylinders 37 rotatably arranged at equal intervals on the fixed cylinders 32, a mixing spiral roller 38 fixedly connected to the outer side of the stirring cylinders 37, a plurality of vibrating cylinders 313 fixedly connected in a spiral equidistant array on the stirring cylinders 37, and a plurality of vibrating cams 320 equidistantly arranged inside the vibrating cylinders 313, the stirring cylinders 37 and the mixing spiral rollers 38 being used to stir materials, and the vibration cams 320 rotating to generate vibration to eliminate air bubbles; A scraping component is provided on the side of the fixed cylinder 32 near the filter cylinder 110. The scraping component is used to clean the blockage on the outside of the filter cylinder 110. A cleaning assembly is provided on the inner side of the discharge cylinder 19. The cleaning assembly includes a rotatable mixing drive shaft 35. Several sealing cylinders 24 are fixedly connected to the outer side of the mixing drive shaft 35 in a spiral equidistant array. Short scrapers 29 are slidably arranged on the inner side of the sealing cylinders 24. The contact force between the short scrapers 29 and the filter cylinder 110 is adjustable so as to clean the inner wall of the filter cylinder 110 during discharge and prevent material blockage.

[0022] In this design, the rotation direction of the stirring drum 37 is opposite to that of the vibration drive shaft 314, which enables the vibration driven shaft 322 to rotate at an accelerated speed. The stirring drum 37 drives the mixing spiral roller 38 to rotate, thus stirring and mixing the material in the mixing drum 1. The vibration driven shaft 322 drives the vibration cam 320 to rotate in the vibration drum 313, generating high-frequency vibration, thereby eliminating air bubbles in the material. In addition, several annular rods 34 are fixedly arranged between two adjacent stirring drums 37. The annular rods 34 revolve with the fixed drum 32, playing an auxiliary stirring role.

[0023] Example 2

[0024] like Figure 1 As shown, based on Embodiment 1, in this embodiment, the mixing cylinder 1 is fixedly installed at the feed end of the coating equipment, the bottom of the mixing cylinder 1 is provided with a base 10, and a number of hydraulic cylinders 11 are installed at equal intervals between the mixing cylinder 1 and the base 10. The base 10 can adjust its distance from the mixing cylinder 1 by the extension and retraction movement of the hydraulic cylinders 11. The inner side of the base 10 is fixedly connected to the discharge pipe 14, and the discharge pipe 14 is fixedly connected to the bottom of the discharge cylinder 19. The discharge cylinder 19 is slidably connected to the bottom of the mixing cylinder 1. A feed inlet 12 is fixedly installed on the top of the mixing cylinder 1. Various raw materials for chitosan dressing production are fed into the feed inlet 12, along with a suitable proportion of water. A first support plate 15 and a second support plate 16 are fixedly connected to the top inner side of the mixing cylinder 1. A rotating plate 39 is rotatably connected to the inner side of the second support plate 16. A support ring 18 is fixedly connected to the bottom of the rotating plate 39. The control base 10 moves to drive the discharge cylinder 19 to disengage from the support ring 18, so that the discharge cylinder 19 no longer obstructs the filter cylinder 110. The mixed chitosan adhesive enters the discharge cylinder 19 from the filter cylinder 110. The filter cylinder 110 is fixedly connected between the support ring 18 and the mixing cylinder 1, and its top is embedded inside the support ring 18. A spiral extrusion roller 17 is rotatably installed on the inner side of the discharge cylinder 19. The spiral extrusion roller 17 is used to assist in discharge. The bottom of the discharge pipe 14 is connected to the storage device of the coating equipment through a conveying pump. The storage device is pressurized to the nozzle through the flow channel and then sprayed out by the nozzle, thereby transferring to the substrate.

[0025] Example 3

[0026] like Figure 3 , Figures 6-7 As shown, based on the above embodiments, in this embodiment, the mixing component further includes a mixing motor 3 fixedly installed on the top of the mixing cylinder 1. A bearing bracket 13 is fixedly connected to the top of the mixing cylinder 1. The mixing motor 3 is fixedly installed on one side of the bearing bracket 13. A driving bevel gear 30 is fixedly connected to the output end of the mixing motor 3. A driven bevel gear 31 is meshed with the outer side of the driving bevel gear 30. The driven bevel gear 31 is fixed to the outer side of the mixing drive shaft 35. The mixing drive shaft 35 is rotatably connected to the mixing cylinder 1 and the bearing bracket 13. The mixing drive shaft 35 is fixedly connected to the rotating plate 39. The fixed cylinder 32 is fixedly connected to the inner side of the rotating plate 39.

[0027] During the mixing stage, the discharge cylinder 19 is embedded inside the support ring 18. First, the mixing motor 3 drives the rotating plate 39 to rotate. The rotating plate 39 synchronously drives the fixed cylinder 32 to perform circumferential motion. The fixed cylinder 32 remains stationary relative to the rotating plate 39. A mixing gear ring 390 is fixedly connected to the inner side of the first support plate 15. A plurality of mixing gears 310 are meshed in a circular array on the inner side of the mixing gear ring 390. A mixing drive shaft 311 is fixedly connected to the inner side of the mixing gears 310. A plurality of mixing bevel gears 315 are fixedly connected at equal intervals on the inner side of the fixed cylinder 32. A stirring bevel gear 316 is meshed at the bottom of the mixing bevel gear 315. A vibration transmission shaft 314 is fixedly connected to the inner side of the stirring bevel gear 316. The vibration transmission shaft 314 is rotatably connected to the inner side of the stirring cylinder 37. A second bushing 317 is rotatably connected to the outer side of the vibration transmission shaft 314. The second bushing 317 is fixedly connected to the fixed cylinder 32.

[0028] When the rotating plate 39 synchronously drives several fixed cylinders 32 to revolve, the mixing gear 310 rolls on the fixed mixing gear ring 390, thereby driving the vibration transmission shaft 314 to rotate through the mixing drive shaft 311, the mixing bevel gear disk 315 and the stirring bevel gear 316. A plurality of first bushings 312 are fixedly connected at equal intervals to the outer side of the fixed cylinder 32. The stirring cylinder 37 is rotatably connected to the inner side of the first bushings 312. A plurality of annular slide rails 36 are fixedly connected at equal intervals to the inner side wall of the mixing cylinder 1. A mixing bevel gear ring 361 is fixedly connected to the inner side of the annular slide rail 36. A sealing slip ring 360 is slidably connected to the inner side of the annular slide rail 36. A mixing bevel gear 362 is fixedly connected to one end of the stirring cylinder 37 extending to the inner side of the annular slide rail 36. The mixing bevel gear 362 meshes with the mixing bevel gear ring 361. The sealing slip ring 360 is rotatably connected to the other end of the stirring cylinder 37. Meanwhile, as the fixed cylinder 32 revolves, the mixing bevel gear 362 at its end rolls on the fixed mixing bevel gear ring 361, thereby driving the mixing cylinder 37 to rotate on its own. This compound motion allows the mixing spiral roller 38 on the mixing cylinder 37 to both revolve and rotate, greatly improving the mixing efficiency. Several vibrating bevel gears 318 are fixedly connected at equal intervals to the outer side of the vibrating drive shaft 314. Vibrating bevel gears 319 are meshed with the outer side of the vibrating bevel gears 318. Several vibrating bevel gears 319 are arranged in a spiral array at equal intervals. A vibrating driven shaft 322 is fixedly connected to the inner side of the vibrating bevel gears 319. The vibrating driven shaft 322 is rotatably connected to the stirring cylinder 37. The vibrating driven shaft 322 is rotatably connected to the vibrating cylinder 313. The vibrating driven shaft 322 is fixedly connected to several vibrating cams 320. Several vibrating rods 321 are fixedly connected at equal intervals to the outer side of the vibrating cylinder 313.

[0029] Furthermore, such as Figure 3 As shown, when the fixed cylinder 32 revolves in the forward direction, the mixing bevel gear 315 is set on the top of the stirring bevel gear 316. Therefore, during the process of driving the stirring cylinder 37 to rotate, its rotation direction is opposite to the rotation direction of the vibration transmission shaft 314. When the stirring cylinder 37 rotates, it drives the mixing spiral roller 38 fixed on its outer side and the vibrating cylinder 313 to rotate synchronously. The mixing spiral roller 38 performs strong stirring and shearing on the material in the mixing cylinder 1. Furthermore, a number of vibrating bevel gear disks 318 are fixedly connected at equal intervals on the outer side of the vibrating drive shaft 314. Each vibrating bevel gear disk 318 is meshed with a vibrating bevel gear 319 on its outer side, and the vibrating bevel gears 319 are arranged in a spiral equidistant array. A vibrating driven shaft 322 is fixedly connected to the inner side of the vibrating bevel gear 319. The vibrating driven shaft 322 is rotatably connected to both the stirring cylinder 37 and the vibrating cylinder 313. Several vibrating cams 320 are fixedly connected to the vibrating driven shaft 322, and several vibrating rods 321 are fixedly connected to the outer side of the vibrating cylinder 313 at equal intervals. During the rotation of the stirring cylinder 37, the vibrating bevel gear 319 first drives the vibrating bevel gear disk 318 to roll. Since the vibrating bevel gear disk 318 is also rotating, and the direction of rotation is opposite to the direction of rotation of the stirring cylinder 37, this design can achieve accelerated rotation. Each vibrating bevel gear 319 drives the vibrating driven shaft 322 to rotate. The several vibrating cams 320 fixed on the vibrating driven shaft 322 rotate at high speed inside the vibrating cylinder 313 to generate high-frequency mechanical vibration. This vibration is transmitted to the surrounding material through the vibrating cylinder 313 and the vibrating rods 321 fixed at equal intervals on its outer side, effectively breaking up and eliminating air bubbles mixed in with the material, and ensuring the density of the coating slurry.

[0030] A number of fixed rods 33 are fixedly connected at equal intervals on one side of the fixed cylinder 32 near the first bushing 312. A number of annular rods 34 are fixedly connected at equal intervals between two adjacent fixed cylinders 32 and fixed rods 33 at different heights, forming a cage-type stirring structure to further enhance the mixing and turning of materials.

[0031] Example 4

[0032] like Figure 3 and Figure 5 As shown, based on the above embodiments, in this embodiment, the scraping assembly includes a scraping cylinder 4, which is fixedly connected to the side of the fixed cylinder 32 away from the first bushing 312. A plurality of damping rods 41 are equidistantly arranged on the inner side of the scraping cylinder 4. The damping rods 41 are fixedly connected to the fixed cylinder 32. A second spring 43 is fixedly connected to the fixed end of the damping rod 41. The telescopic end of the damping rod 41 and the second spring 43 are fixedly connected to a scraping column plate 42. The scraping column plate 42 is slidably connected to the scraping cylinder 4. A long scraper 40 is fixedly connected to one end of the plurality of scraping column plates 42 extending to the outside of the scraping cylinder 4. The long scraper 40 is in contact with the outer wall of the filter cylinder 110. During the mixing process of raw materials, large particles may get stuck in the gaps of the filter cylinder 110 during random movement. During mixing, the mixing motor 3 drives the scraper cylinder 4 to revolve with the fixed cylinder 32. The extension end of the damping rod 41 inside the scraper cylinder 4 pushes the scraper plate 42 outward under the elastic force of the second spring 43. The scraper plate 42 drives the long scraper 40 to always be in close contact with the outer wall of the filter cylinder 110. During the circular motion, the long scraper 40 scrapes away the blockages attached to the outer wall of the filter cylinder 110, keeping the filter screen unobstructed.

[0033] Example 5

[0034] like Figures 8-10 As shown, based on the above embodiments, in this embodiment, the cleaning assembly further includes a cleaning motor 2 fixedly installed on the top of the mixing cylinder 1. The output end of the cleaning motor 2 is fixedly connected to a cleaning drive shaft 20. The cleaning drive shaft 20 is rotatably connected to the mixing drive shaft 35. A plurality of cleaning bevel gears 21 are fixedly connected at equal intervals to the outer side of the inner part of the cleaning drive shaft 20 extending to the mixing drive shaft 35. A cleaning bevel gear 22 is meshed with the outer side of the cleaning bevel gears 21. The cleaning bevel gears 22 are distributed in a spiral array at equal intervals.

[0035] A cleaning reciprocating screw 23 is fixedly connected to the inner side of the cleaning bevel gear 22. The cleaning reciprocating screw 23 is rotatably connected to the mixing drive shaft 35. A limit cylinder 25 is provided on the inner side of the sealing cylinder 24, and the limit cylinder 25 is fixedly connected to the mixing drive shaft 35. A threaded cylinder 28 is provided on the inner side of the limit cylinder 25 for limiting and sliding. The threaded cylinder 28 is threadedly connected to the cleaning reciprocating screw 23. A first spring 26 is fixedly connected to the end of the threaded cylinder 28. A cleaning column plate 27 is fixedly connected to the other end of the first spring 26. The cleaning column plate 27 is slidably connected to the sealing cylinder 24. The other end of the cleaning column plate 27 is fixedly connected to the short scraper 29.

[0036] Furthermore, during the discharge stage, by driving the discharge cylinder 19 to move, the discharge cylinder 19 no longer obstructs the filter cylinder 110. The chitosan adhesive flows from the top of the discharge cylinder 19 into its inner side. The discharge cylinder 19 moves down by the vertical distance of one short scraper 29 each time, ensuring that the short scraper 29 can fully contact the exposed filter cylinder 110. The area swept by the spirally and equally spaced short scrapers 29 is uninterrupted, that is, there is no blind spot between the areas swept by two adjacent short scrapers 29. Because medical chitosan adhesive has a certain viscosity, when the discharge cylinder 19 is lower than the liquid level, the chitosan adhesive enters the inner side of the discharge cylinder 19 from the top. If its viscosity is high and the flow speed is slow, it is easy to clog the filter cylinder 110. Furthermore, depending on the viscosity of the chitosan adhesive, if the viscosity is low, its self-flowing ability is strong. It can be driven by the output of the cleaning motor 2 and the mixing motor 3 to rotate in the same direction and speed. At this time, the cleaning bevel disc 21 and the cleaning bevel gear 22 are regarded as a rigid body and do not move relative to each other. The contact force between the short scraper 29 and the inner wall of the discharge cylinder 19 remains unchanged. At this time, the threaded cylinder 28 is completely located inside the limiting cylinder 25. The elastic potential energy of the first spring 26 is the smallest, and the pressure acting on the short scraper 29 is also the smallest. It slightly scrapes the filter cylinder 110 and accelerates the flow of chitosan adhesive from the filter cylinder 110. Furthermore, if during the discharge stage, the output ends of the cleaning motor 2 and the mixing motor 3 rotate in the same direction, but there is a speed difference between them, the cleaning bevel gear 22 will rotate, thereby driving the cleaning reciprocating screw 23 to rotate, driving the threaded cylinder 28 to move and extend the limiting cylinder 25, thus adjusting the elastic potential energy of the first spring 26, and thereby adjusting the contact force between the short scraper 29 and the filter cylinder 110 in real time. After the adjustment is completed, the output ends of the cleaning motor 2 and the mixing motor 3 are driven to rotate in the same direction and at the same speed. At this time, the elastic potential energy of the first spring 26 is adjusted, thereby changing the scraping effect and adapting to chitosan adhesive solutions of different viscosities. Furthermore, by driving the cleaning motor 2 and the mixing motor 3 to rotate in different directions, the cleaning bevel gear 22 is driven to move faster, and the reciprocating cycle of the threaded cylinder 28 is shortened. That is, the contact force between the short scraper 29 and the filter cylinder 110 changes periodically, resulting in denser and faster shearing and peeling action, reducing discharge resistance.

[0037] Furthermore, a portion of the bottom of the discharge cylinder 19 still obstructs the filter cylinder 110, and the adhesive enters the discharge pipe 14 through this portion. Therefore, in order to keep the discharge cylinder 19 clean and reduce the adhesion of the adhesive, the short scraper 29 also plays the same role as described above for the part in contact with the discharge cylinder 19.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for preparing a biocompatible coating for a chitosan antibacterial dressing, comprising a mixing cylinder (1), characterized in that, A filter cylinder (110) is fixedly connected to the inner side of the mixing cylinder (1), and a discharge cylinder (19) is slidably connected to the inner side of the filter cylinder (110). A mixing component is provided inside the mixing cylinder (1). The mixing component includes several fixed cylinders (32) arranged in a circumferential array. Several stirring cylinders (37) are equidistantly arranged on the fixed cylinders (32). A mixing spiral roller (38) is fixedly connected to the outer side of the stirring cylinder (37). Several vibrating cylinders (313) are fixedly connected in a spiral equidistant array on the stirring cylinder (37). Several vibrating cams (320) are equidistantly arranged inside the vibrating cylinders (313). The stirring cylinders (37) and the mixing spiral roller (38) are used to stir the materials. The vibration cams (320) rotate to generate vibration to eliminate air bubbles. The fixed cylinder (32) is provided with a scraping component on the side near the filter cylinder (110), and the scraping component is used to clean the blockage on the outside of the filter cylinder (110); The inner side of the discharge cylinder (19) is provided with a cleaning component, which includes a rotatable mixing drive shaft (35). The outer side of the mixing drive shaft (35) is fixedly connected with a plurality of sealing cylinders (24) in a spiral equidistant array. The inner side of the sealing cylinder (24) is provided with a short scraper (29), and the contact force between the short scraper (29) and the filter cylinder (110) is adjustable.

2. The apparatus for preparing a biocompatible coating for a chitosan antibacterial dressing according to claim 1, characterized in that, The bottom of the mixing cylinder (1) is provided with a base (10). Several oil cylinders (11) are installed at equal intervals between the mixing cylinder (1) and the base (10). The inner side of the base (10) is fixedly connected to a discharge pipe (14). The discharge pipe (14) is fixedly connected to the bottom of the discharge cylinder (19). The top of the mixing cylinder (1) is fixedly installed with a feed inlet (12). The top of the inner side of the mixing cylinder (1) is fixedly connected with a first support plate (15) and a second support plate (16). The inner side of the second support plate (16) is rotatably connected with a rotating plate (39). The bottom of the rotating plate (39) is fixedly connected with a support ring (18). The filter cylinder (110) is fixedly connected between the support ring (18) and the mixing cylinder (1). The discharge cylinder (19) is slidably connected to the bottom of the mixing cylinder (1), and its top is embedded in the inner side of the support ring (18). The inner side of the discharge cylinder (19) is rotatably provided with a spiral extrusion roller (17).

3. The apparatus for preparing a biocompatible coating for a chitosan antibacterial dressing according to claim 2, characterized in that, The mixing assembly also includes a mixing motor (3) fixedly installed on the top of the mixing cylinder (1). A bearing bracket (13) is fixedly connected to the top of the mixing cylinder (1). The mixing motor (3) is fixedly installed on one side of the bearing bracket (13). A driving bevel gear (30) is fixedly connected to the output end of the mixing motor (3). A driven bevel gear (31) is meshed with the outer side of the driving bevel gear (30). The driven bevel gear (31) is fixed to the outer side of the mixing drive shaft (35). The mixing drive shaft (35) is rotatably connected to the mixing cylinder (1) and the bearing bracket (13). The mixing drive shaft (35) is fixedly connected to the rotating plate (39). The fixed cylinder (32) is fixedly connected to the inner side of the rotating plate (39).

4. The apparatus for preparing a biocompatible coating for a chitosan antibacterial dressing according to claim 3, characterized in that, A mixing gear ring (390) is fixedly connected to the inner side of the first support plate (15). A plurality of mixing gears (310) are meshed in a circular array on the inner side of the mixing gear ring (390). A mixing drive shaft (311) is fixedly connected to the inner side of the mixing gears (310). A plurality of mixing bevel gears (315) are fixedly connected at equal intervals on the inner side of the fixed cylinder (32) of the mixing drive shaft (311). A stirring bevel gear (316) is meshed at the bottom of the mixing bevel gear (315). A vibration transmission shaft (314) is fixedly connected to the inner side of the stirring bevel gear (316). The vibration transmission shaft (314) is rotatably connected to the inner side of the stirring cylinder (37). A second bushing (317) is rotatably connected to the outer side of the vibration transmission shaft (314). The second bushing (317) is fixedly connected to the fixed cylinder (32).

5. The apparatus for preparing a biocompatible coating for a chitosan antibacterial dressing according to claim 4, characterized in that, A plurality of first bushings (312) are fixedly connected at equal intervals on the outer side of the fixed cylinder (32). The stirring cylinder (37) is rotatably connected to the inner side of the first bushings (312). A plurality of annular slide rails (36) are fixedly connected at equal intervals on the inner side wall of the mixing cylinder (1). A mixing bevel gear ring (361) is fixedly connected to the inner side of the annular slide rail (36). A sealing slip ring (360) is slidably connected to the inner side of the annular slide rail (36). A mixing bevel gear (362) is fixedly connected to one end of the stirring cylinder (37) extending to the inner side of the annular slide rail (36). The mixing bevel gear (362) meshes with the mixing bevel gear ring (361). The sealing slip ring (360) is rotatably connected to the other end of the stirring cylinder (37).

6. The apparatus for preparing a biocompatible coating for a chitosan antibacterial dressing according to claim 5, characterized in that, A plurality of vibrating bevel gear discs (318) are fixedly connected at equal intervals on the outer side of the vibrating drive shaft (314). Vibrating bevel gears (319) are meshed on the outer side of the vibrating bevel gear discs (318). The plurality of vibrating bevel gears (319) are arranged in a spiral array at equal intervals. A vibrating driven shaft (322) is fixedly connected to the inner side of the vibrating bevel gears (319). The vibrating driven shaft (322) is rotatably connected to the stirring cylinder (37). The vibrating driven shaft (322) is rotatably connected to the vibrating cylinder (313). The vibrating driven shaft (322) is fixedly connected to a plurality of vibrating cams (320). A plurality of vibrating rods (321) are fixedly connected at equal intervals on the outer side of the vibrating cylinder (313).

7. The apparatus for preparing a biocompatible coating for a chitosan antibacterial dressing according to claim 1, characterized in that, A number of fixing rods (33) are fixedly connected at equal intervals on the side of the fixing cylinder (32) near the first bushing (312), and a number of ring rods (34) are fixedly connected at equal intervals between two adjacent fixing cylinders (32) and fixing rods (33) of different heights.

8. The apparatus for preparing a biocompatible coating for a chitosan antibacterial dressing according to claim 1, characterized in that, The scraping assembly includes a scraping cylinder (4), which is fixedly connected to the side of the fixed cylinder (32) away from the first bushing (312). A plurality of damping rods (41) are equidistantly arranged on the inner side of the scraping cylinder (4). The damping rods (41) are fixedly connected to the fixed cylinder (32). A second spring (43) is fixedly connected to the fixed end of the damping rod (41). The telescopic end of the damping rod (41) and the second spring (43) are fixedly connected to a scraping column plate (42). The scraping column plate (42) is slidably connected to the scraping cylinder (4). A long scraper (40) is fixedly connected to one end of the multiple scraping column plates (42) extending to the outside of the scraping cylinder (4). The long scraper (40) is in contact with the outer wall of the filter cylinder (110).

9. The apparatus for preparing a biocompatible coating for a chitosan antibacterial dressing according to claim 1, characterized in that, The cleaning assembly also includes a cleaning motor (2) fixedly installed on the top of the mixing cylinder (1). The output end of the cleaning motor (2) is fixedly connected to a cleaning drive shaft (20). The cleaning drive shaft (20) is rotatably connected to the mixing drive shaft (35). A number of cleaning bevel gears (21) are fixedly connected at equal intervals to the outer side of the part of the cleaning drive shaft (20) extending to the inner side of the mixing drive shaft (35). A cleaning bevel gear (22) is meshed with the outer side of the cleaning bevel gear (21). The cleaning bevel gears (22) are distributed in a spiral array at equal intervals.

10. The apparatus for preparing a biocompatible coating for a chitosan antibacterial dressing according to claim 9, characterized in that, The cleaning bevel gear (22) is fixedly connected to the inner side of a cleaning reciprocating screw (23), which is rotatably connected to a mixing drive shaft (35). The inner side of the sealing cylinder (24) is provided with a limiting cylinder (25), which is fixedly connected to the mixing drive shaft (35). The inner side of the limiting cylinder (25) is provided with a threaded cylinder (28), which is threadedly connected to the cleaning reciprocating screw (23). The end of the threaded cylinder (28) is fixedly connected to a first spring (26), and the other end of the first spring (26) is fixedly connected to a cleaning column plate (27). The cleaning column plate (27) is slidably connected to the sealing cylinder (24), and the other end of the cleaning column plate (27) is fixedly connected to a short scraper (29).

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