Scraper assembly and dry type granulator

Abstract

The utility model relates to the technical field of granulators, and discloses a scraper assembly and a dry type granulator, the scraper assembly comprises a first scraper, the cutting edge of the first scraper is suitable for being arranged close to the outer circumference of a first compression roller, a guide-out surface and a first guide-in surface are formed on the first scraper, an angle is formed between the guide-out surface and the first guide-in surface, and the first guide-in surface is arranged close to the outer circumference of the first compression roller. And the guide-out surface is suitable for guiding the material sheets to the working area. According to the utility model, the first scraper is arranged, so that material sheets adhered to the first compression roller can be conveniently cleaned; the guide-out face is arranged on the first scraper, scraped material pieces are guided and collected, the material pieces accurately enter a working area, and the situation that the crushing efficiency is affected due to the fact that the material pieces enter a non-working area by mistake is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of granulators, and particularly relates to a scraper assembly and a dry granulator. Background Art

[0002] In the pharmaceutical industry, dry granulators are widely used for processing various active pharmaceutical ingredients and one or more excipients. In a general dry granulator, when the dry granulator is working, powdery materials are sent to a roller extrusion mechanism and are pressed into solid cake-shaped thin strip blocks by a pair of rollers, and through the pre-crushing and granulating processes of the granulating mechanism, granular finished products are obtained.

[0003] Scrapers are often provided in dry granulators to clean the material flakes adhering to the roller pair. For the scrapers in the prior art, their front tool faces usually adopt a single guiding surface structure. However, due to the single shape of the guiding surface of such a scraper, the scraped material flakes will also fall into areas outside the working area along with the guiding surface, leaving potential hazards such as accumulation in the non-working area. Summary of the Utility Model

[0004] In view of this, the utility model provides a scraper assembly and a dry granulator to solve the problem that the scraped material flakes fall into the non-working area, resulting in potential hazards of accumulation.

[0005] In a first aspect, the utility model provides a scraper assembly, including: a first scraper, the blade of the first scraper is adapted to be arranged close to the outer circumference of a first roller, a guiding-out surface and a first guiding-in surface are formed on the first scraper, the guiding-out surface and the first guiding-in surface are arranged at an angle, and the guiding-out surface is adapted to guide the material flakes into the working area.

[0006] Beneficial effects: By providing the first scraper, it is convenient to clean the material flakes adhering to the first roller; by providing the guiding-out surface on the first scraper, the scraped material flakes are guided and collected, so that they accurately enter the working area, avoiding the material flakes from entering the non-working area by mistake and affecting the crushing efficiency.

[0007] In an optional embodiment, the first scraper includes a first main body part and a guiding-out part, the guiding-out part is connected to the first main body part, the guiding-out surface is arranged on the guiding-out part, a blade is formed on the first main body part, the first guiding-in surface is arranged on the first main body part, and the first guiding-in surface and the guiding-out surface are connected to form a first continuous curved surface.

[0008] In an optional embodiment, the scraper assembly further includes a first fastener group, the first main body part is provided with a first fixing hole group, and the first fastener group passes through the first fixing hole group and is adapted to be fastened to the chassis panel.

[0009] Beneficial effects: The detachable connection between the first scraper and the chassis panel is realized through the first fastener group, and the first scraper can be repaired or replaced according to the actual situation, improving the applicability of the dry granulator.

[0010] In an alternative embodiment, the scraper assembly further includes a second scraper, the blade of the second scraper is adapted to be disposed adjacent to the outer circumference of the second pressure roller, and a tool passing groove is formed in the second scraper.

[0011] Beneficial effects: By providing the second scraper, it is convenient to clean the material flakes adhered to the second pressure roller.

[0012] In an alternative embodiment, the second scraper includes a second main body portion and an anvil portion, the second main body portion is connected to the anvil portion, a blade is formed on the second main body portion, the tool passing groove is formed in the anvil portion, a second guiding surface is formed on the second main body portion, an anvil surface is formed on the anvil portion, and the second guiding surface and the anvil surface are connected to form a second continuous curved surface.

[0013] Beneficial effects: The tool passing groove is formed in the anvil portion, and the anvil portion cooperates with the crushing knife to perform a shearing process on the material flakes, and the crushed small material pieces are conveyed to the next process through the tool passing groove.

[0014] In an alternative embodiment, the scraper assembly further includes a second fastener group, second fixing hole groups are formed in the second main body portion, and the second fastener group passes through the second fixing hole groups and is adapted to be fastened to the chassis panel.

[0015] Beneficial effects: The detachable connection between the second scraper and the chassis panel is realized through the second fastener group, and the second scraper can be repaired or replaced according to the actual situation, improving the applicability of the dry granulator.

[0016] In a second aspect, the present invention provides a dry granulator, including: the above-mentioned scraper assembly; a pressure roller assembly including a first pressure roller and a second pressure roller, the first pressure roller and the second pressure roller are rotatably arranged, the rotation direction of the first pressure roller is opposite to the rotation direction of the second pressure roller, and a material pressing channel is formed between the first pressure roller and the second pressure roller; a crushing assembly, an inlet of the crushing assembly is communicated with an outlet of the material pressing channel, a working area and a non-working area are formed in the crushing assembly, and the scraper assembly is arranged in the crushing assembly.

[0017] In an alternative embodiment, the crushing assembly includes an aggregate cover, a crushing structure and a chassis panel, the crushing structure and the scraper assembly are both arranged in the aggregate cover, the working area and the non-working area are formed in the aggregate cover, and the aggregate cover is arranged on the chassis panel.

[0018] Beneficial effects: By arranging the crushing structure inside the aggregate cover, it prevents the material flakes from bouncing and splashing during the crushing process, improving the safety of the dry granulator.

[0019] In an alternative embodiment, the crushing structure includes a crushing knife and a transmission shaft. The crushing knife is arranged on the transmission shaft, and the transmission shaft penetrates through the chassis panel.

[0020] In an alternative embodiment, the crushing knife is provided with a plurality of blades, and the plurality of blades are arranged at intervals and displaced in pairs along the axial direction of the transmission shaft.

[0021] Beneficial effects: By providing a crushing knife with a plurality of blades, the crushing efficiency of the crushing structure and the production capacity of the dry granulator are further improved. Description of the Drawings

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the dry granulator according to an embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of the overall structure of the first scraper according to an embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of the overall structure of the second scraper according to an embodiment of the present invention;

[0026] Figure 4 is Figure 3 View in the direction of K in

[0027] Description of the Reference Numerals:

[0028] 10, roller assembly; 11, first roller; 12, second roller; 20, crushing assembly; 21, aggregate cover; 22, crushing structure; 221, crushing knife; 222, transmission shaft; 31, first scraper; 311, export surface; 312, first import surface; 313, first main body; 314, export part; 315, first fixing hole group; 32, second scraper; 321, knife passing groove; 322, second main body; 3221, second import surface; 323, anvil part; 3231, anvil surface; 324, second fixing hole group; 40, first fastener group; 50, second fastener group. Detailed Embodiments

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] The following combines Figures 1 to 4 , and describes the embodiments of the present utility model.

[0031] In a first aspect, the present utility model provides a scraper assembly, including a first scraper 31. The blade of the first scraper 31 is adapted to be disposed close to the outer circumference of the first pressure roller 11. A discharge surface 311 and a first inlet surface 312 are formed on the first scraper 31. The discharge surface 311 and the first inlet surface 312 are disposed at an angle, and the discharge surface 311 is adapted to guide the material sheet to the working area.

[0032] Applying the scraper assembly of this embodiment, by providing the first scraper 31, it is convenient to clean the material sheet adhered to the first pressure roller 11; by providing the discharge surface 311 on the first scraper 31, the scraped material sheet is guided and aggregated, so that it accurately enters the working area, avoiding the material sheet from entering the non-working area by mistake and affecting the crushing efficiency.

[0033] It should be noted that in the related art, the front cutting surface of the scraper usually adopts a single guiding surface structure. After the material sheet is scraped off, it moves backward along the single guiding surface. The material sheet may enter the non-working area under the action of inertia. The accumulation of the material sheet in the non-working area will affect the movement of the crushing assembly 20, may cause jamming of the crushing knife 221, and even risk of overload shutdown of the crushing assembly 20, greatly affecting the crushing efficiency of the crushing assembly 20.

[0034] In one embodiment, as Figure 2 shown, the first scraper 31 includes a first main body portion 313 and a discharge portion 314. The discharge portion 314 is connected to the first main body portion 313. The discharge surface 311 is disposed on the discharge portion 314. A blade is formed on the first main body portion 313. The first inlet surface 312 is disposed on the first main body portion 313. The first inlet surface 312 and the discharge surface 311 are connected to form a first continuous curved surface.

[0035] Specifically, the first inlet surface 312 and the discharge surface 311 are smoothly transitionally connected to form a first continuous curved surface in the shape of a V with the opening facing vertically downward.

[0036] In one embodiment, as Figure 1 and Figure 2As shown, the scraper assembly further includes a first fastener group 40. The first main body portion 313 is provided with a first set of fixing holes 315. The first fastener group 40 passes through the first set of fixing holes 315 and is adapted to be fastened to the chassis panel. The detachable connection between the first scraper 31 and the chassis panel is realized through the first fastener group 40, and the first scraper 31 can be repaired or replaced according to the actual situation, improving the applicability of the dry granulator.

[0037] Specifically, in this embodiment, the first scraper 31 is detachably connected to the chassis panel by the first fastener group 40 passing through the first set of fixing holes 315.

[0038] Of course, in other alternative embodiments, the number of the first set of fixing holes 315 and the first fastener group 40 can also be selected according to the actual situation to achieve a firm connection between the first scraper 31 and the chassis panel.

[0039] Specifically, the first set of fixing holes 315 is provided with oblong holes to facilitate adjusting the small distance between the cutting edge of the first scraper 31 and the outer circumference of the first pressing roller 11.

[0040] In one embodiment, as Figure 1 、 Figure 3 and Figure 4 shown, the scraper assembly further includes a second scraper 32. The cutting edge of the second scraper 32 is adapted to be disposed close to the outer circumference of the second pressing roller 12, and a knife passing groove 321 is formed on the second scraper 32. By providing the second scraper 32, it is convenient to clean the material flakes adhered to the second pressing roller 12.

[0041] In one embodiment, as Figure 3 and Figure 4 shown, the second scraper 32 includes a second main body portion 322 and an anvil portion 323. The second main body portion 322 is connected to the anvil portion 323. A cutting edge is formed on the second main body portion 322. The knife passing groove 321 is formed on the anvil portion 323. The second main body portion 322 forms a second guiding surface 3221, and the anvil portion 323 forms an anvil surface 3231. The second guiding surface 3221 and the anvil surface 3231 are connected to form a second continuous surface. The knife passing groove 321 is formed on the anvil portion 323. The anvil portion 323 cooperates with the crushing knife 221 to perform a shearing process on the material flakes, and the crushed material flakes are conveyed to the next process through the knife passing groove 321.

[0042] It should be noted that a plurality of knife passing grooves 321 are spacedly formed on the anvil portion 323, and the spacing distance thereof is adapted to the spacing between adjacent blades of the crushing knife 221.

[0043] It should be noted that, please refer to Figure 1 , the second guiding surface 3221 also plays a role in guiding the material flakes downward.

[0044] Specifically, the anvil surface 3231 is an upward gentle slope and a plane communicating with a plurality of tool passing grooves 321.

[0045] Specifically, the second guiding surface 3221 is smoothly transitionally connected to the anvil surface 3231 to form a second continuous curved surface in a V shape with the opening facing vertically upward.

[0046] Furthermore, the arrangement of the second guiding surface 3221 and the anvil surface 3231 not only ensures the rapid downward guiding and conveying of the material sheet scraped off by the second pressing roller 12, but also can receive the material sheet scraped off by the first pressing roller 11, so as to facilitate the collection of the material sheet into the storage area and the working area.

[0047] It should be noted that the first continuous curved surface and the second continuous curved surface are arranged facing each other up and down, and both adopt V-shaped curved surfaces, which are suitable for granulating general flowing materials, high-viscosity materials, and also for granulating occasions where the self-breaking effect of the cake-like thin strips after roll pressing is poor. It is worth noting that the first continuous curved surface and the second continuous curved surface are arranged facing each other up and down, and both adopt V-shaped curved surfaces, which not only avoid the phenomena of material sheet accumulation, bridging (arching) or even blockage in the non-working area, but also ensure good crushing quality and high efficiency, wider material application range, low operation and management cost, and high production efficiency.

[0048] In one embodiment, as Figure 1 and Figure 3 shown, the scraper assembly further includes a second fastener group 50. The second main body 322 is provided with a second fixing hole group 324. The second fastener group 50 passes through the second fixing hole group 324 and is adapted to be fastened to the chassis panel. The detachable connection of the second scraper 32 to the chassis panel is realized through the second fastener group 50, and the second scraper 32 can be repaired or replaced according to the actual situation, improving the applicability of the dry granulator.

[0049] Specifically, in this embodiment, the second scraper 32 is detachably connected to the chassis panel through the second fastener group 50 passing through the second fixing hole group 324.

[0050] Of course, in other alternative embodiments, the number of the second fixing hole group 324 and the second fastener group 50 can also be selected according to the actual situation to realize the firm connection of the second scraper 32 to the crushing assembly 20.

[0051] Specifically, the second fixing hole group 324 is provided with waist holes to facilitate the adjustment of the small distance between the cutting edge of the second scraper 32 and the outer circumference of the second pressing roller 12.

[0052] In one embodiment, as Figure 2 and Figure 3 shown, the cutting edge wedge angle of the first scraper 31 is α, and the cutting edge wedge angle of the second scraper 32 is β, and α≈β.

[0053] It should be noted that in the related art, the blade wedge angle of the scraper is too large, resulting in a poor scraping effect of the scraper on the material sheet attached to the pressure roller. Therefore, on the premise of meeting the strength requirements of the scraper, a smaller angle is selected for the blade wedge angle of the first scraper 31 and the second scraper 32 in this embodiment.

[0054] In a second aspect, the present utility model provides a dry granulator, including: the above-mentioned scraper assembly; a pressure roller assembly 10, including a first pressure roller 11 and a second pressure roller 12, the first pressure roller 11 and the second pressure roller 12 are rotatably arranged, the rotation direction of the first pressure roller 11 is opposite to the rotation direction of the second pressure roller 12, and a material pressing channel is formed between the first pressure roller 11 and the second pressure roller 12; a crushing assembly 20, the feeding port of the crushing assembly 20 is communicated with the discharging port of the material pressing channel, a working area and a non-working area are formed in the crushing assembly 20, and the scraper assembly is arranged in the crushing assembly 20.

[0055] It should be noted that a small gap is provided between the blade of the first scraper 31 and the outer circumference of the first pressure roller 11 to prevent the first scraper 31 from interfering with and damaging the first pressure roller 11.

[0056] Specifically, please refer to Figure 1 , the working area in the crushing assembly 20 is the area D-E-F-G-H-D in the figure, and the non-working area is the area D-E-Ea-Da-D in the figure.

[0057] It should be noted that please refer to Figure 1 , the area A-B-C-D-H-J-A in the figure forms a storage area in the crushing assembly 20, and after the material is pressed by the pressure roller assembly 10, it enters the storage area and waits to be crushed.

[0058] Specifically, in this embodiment, the first pressure roller 11 rotates counterclockwise, and the blade on the first main body 313 faces downward to facilitate scraping off the material sheet adhered to the first pressure roller 11 better.

[0059] Specifically, in this embodiment, the second pressure roller 12 rotates clockwise, and the blade on the second main body 322 faces upward to facilitate scraping off the material sheet adhered to the second pressure roller 12 better. It should be noted that the lower end of the knife passing groove 321 is communicated with the discharging port of the crushing assembly 20, and the crushed material sheet is conveyed to the next process through the knife passing groove 321.

[0060] In one embodiment, as Figure 1As shown, the crushing assembly 20 includes an aggregate cover 21, a crushing structure 22 and a chassis panel. The crushing structure 22 and the scraper assembly are both arranged inside the aggregate cover 21. A working area and a non-working area are formed inside the aggregate cover 21, and the aggregate cover 21 is arranged on the chassis panel. By arranging the crushing structure 22 inside the aggregate cover 21, it is possible to prevent the material flakes from bouncing and splashing during the crushing process, thereby improving the safety of the dry granulator.

[0061] It should be noted that the aggregate cover 21 is fastened to the chassis panel.

[0062] In one embodiment, as Figure 1 shown, the crushing structure 22 includes a crushing knife 221 and a transmission shaft 222. The crushing knife 221 is arranged on the transmission shaft 222, and the transmission shaft 222 penetrates through the chassis panel.

[0063] Specifically, please refer to Figure 1 , the guiding direction of the export surface 311 points to the top of the circumscribed cylinder surface of the cutting edge of the crushing knife 221, that is, Figure 1 point D in

[0064] Specifically, the crushing knife 221 is sleeved on the transmission shaft 222, and the transmission shaft 222 is in transmission connection with the power assembly to drive the crushing knife 221 to rotate.

[0065] It should be noted that in other alternative embodiments, a knife sleeve is arranged on the transmission shaft 222, and the crushing knife 221 is welded to the knife sleeve.

[0066] In one embodiment, as Figure 1 shown, the crushing knife 221 is provided with a plurality of blades, and the plurality of blades are arranged at intervals and staggeredly in pairs along the axial direction of the transmission shaft 222. By arranging a plurality of blades, the crushing efficiency of the crushing structure 22 and the production capacity of the dry granulator are further improved.

[0067] It should be noted that the number of the crushing knives 221 can be selected according to the actual situation.

[0068] It should be noted that the number of the knife passing grooves 321 is correspondingly set with the number of the crushing knives 221. The width of the knife passing groove 321 is greater than the thickness of the blade of the crushing knife 221, and there is a gap between the bottom of the knife passing groove 321 and the cutting edge of the crushing knife 221.

[0069] In one embodiment, as Figure 1 shown, along the vertical direction, the first pressing roller 11 and the second pressing roller 12 are arranged at intervals up and down, and the first scraper 31 and the second scraper 32 are arranged at intervals up and down.

[0070] Of course, in other alternative embodiments, the first pressing roller 11 and the second pressing roller 12 can also be arranged in parallel along the horizontal direction.

[0071] Although embodiments of the present utility model have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A scraper assembly, characterized in that: include: A first scraper (31), wherein the blade of the first scraper (31) is adapted to be arranged close to the outer circumference of the first pressure roller (11), and the first scraper (31) is provided with an outlet surface (311) and a first inlet surface (312), wherein the outlet surface (311) and the first inlet surface (312) are arranged at an angle, and the outlet surface (311) is adapted to guide the material sheet to a working area.

2. The scraper assembly according to claim 1, characterized in that: The first scraper (31) includes a first main body portion (313) and an outlet portion (314), the outlet portion (314) is connected to the first main body portion (313), the outlet surface (311) is arranged on the outlet portion (314), a blade is formed on the first main body portion (313), the first introduction surface (312) is arranged on the first main body portion (313), and the first introduction surface (312) is connected to the outlet surface (311) to form a first continuous curved surface.

3. The scraper assembly according to claim 2, characterized in that: The scraper assembly further comprises a first fastener group (40), the first main body (313) is provided with a first fixing hole group (315), the first fastener group (40) passes through the first fixing hole group (315) and is suitable for being fastened to the chassis panel.

4. The scraper assembly according to any one of claims 1 to 3, characterized in that: The scraper assembly further comprises a second scraper (32), the blade of the second scraper (32) being suitable for being arranged close to the outer circumference of the second pressure roller (12), and a scraper groove (321) being provided on the second scraper (32).

5. The scraper assembly according to claim 4, characterized in that: The second scraper (32) includes a second main body (322) and an anvil (323), the second main body (322) is connected to the anvil (323), a blade is formed on the second main body (322), the knife groove (321) is opened on the anvil (323), the second main body (322) is formed with a second introduction surface (3221), the anvil (323) is formed with an anvil surface (3231), and the second introduction surface (3221) is connected to the anvil surface (3231) to form a second continuous curved surface.

6. The scraper assembly according to claim 5, characterized in that: The scraper assembly also includes a second fastener group (50), the second main body (322) is provided with a second fixing hole group (324), and the second fastener group (50) passes through the second fixing hole group (324) and is suitable for being fastened to the chassis panel.

7. A dry granulator, characterized in that: include: The scraper assembly according to any one of claims 1 to 6; A pressing roller assembly (10) comprises a first pressing roller (11) and a second pressing roller (12), wherein the first pressing roller (11) and the second pressing roller (12) are rotatably arranged, the rotation direction of the first pressing roller (11) is opposite to the rotation direction of the second pressing roller (12), and a pressing channel is formed between the first pressing roller (11) and the second pressing roller (12); A crushing component (20), wherein the feed inlet of the crushing component (20) is connected to the discharge outlet of the pressing channel, a working area and a non-working area are formed in the crushing component (20), and the scraper component is arranged in the crushing component (20).

8. The dry granulator according to claim 7, characterized in that The crushing assembly (20) comprises a material collecting cover (21), a crushing structure (22) and a chassis panel; the crushing structure (22) and the scraper assembly are both arranged in the material collecting cover (21); the working area and the non-working area are formed in the material collecting cover (21); and the material collecting cover (21) is arranged on the chassis panel.

9. The dry granulator according to claim 8, characterized in that The crushing structure (22) comprises a crushing knife (221) and a transmission shaft (222); the crushing knife (221) is arranged on the transmission shaft (222); and the transmission shaft (222) is arranged to penetrate the chassis panel.

10. The dry granulator according to claim 9, characterized in that The crushing knife (221) is provided with a plurality of blades, and the plurality of blades are arranged in pairs and spaced apart from each other in the axial direction of the transmission shaft (222).

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