Wet type granulator

Abstract

The utility model discloses a wet type granulator which comprises a granulator body, a vacuum mechanism and a blowback mechanism, the granulator body is provided with a filter and a feed port, the vacuum mechanism and the blowback mechanism are connected with the filter, the air outlet end of the blowback mechanism is provided with a nozzle, and the nozzle is connected with the filter. The nozzle comprises a first air outlet piece and a second air outlet piece arranged on the first air outlet piece in a sleeving mode, the first air outlet piece is connected with the reverse blowing mechanism, a necking opening is formed in the first air outlet piece, the second air outlet piece is communicated with the filter, and an air inlet channel can be formed between the second air outlet piece and the first air outlet piece. According to the utility model, the speed of air from the back-blowing mechanism is accelerated, the air volume is also increased, and the back-blowing effect on the filter is superior to that in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of wet granulation, in particular to a wet granulator. Background Art

[0002] Wet granulation is a method of preparing granules by adding a binder to drug powder and making the powder agglomerate together by the bridging or bonding action of the binder. It includes extrusion granulation, rotary granulation, fluidized granulation, stirring granulation, etc. The granules made by wet method are surface-wetted, with the advantages of good granule quality, beautiful appearance, strong abrasion resistance, good compression molding property, etc., and are most widely used in the pharmaceutical industry.

[0003] A filter bag is provided in the wet granulator to prevent materials from entering the vacuum equipment during vacuum feeding. During the feeding process, in order to ensure the feeding effect, the materials on the filter bag need to be cleaned reversely to ensure the vacuum feeding effect; in the prior art, such as a low-temperature vacuum spray granulator with the patent number CN214320064U, the structure for reverse powder cleaning includes an anti-blowing main pipe arranged above the trapping device in the trapping chamber, several branch anti-blowing pipes are arranged at the bottom of the anti-blowing main pipe, the branch anti-blowing pipes extend into the dust removal cloth bag and are provided with several anti-blowing nozzles. The part of the branch anti-blowing pipe extending into the dust removal cloth bag is provided with several cloth supporting rods. The cloth supporting rod includes an inclined rod fixed on the branch anti-blowing pipe and a vertical rod at the end of the inclined rod, and the vertical rod abuts against the inner wall of the dust removal cloth bag. The atomizing nozzle is not less than two. It can be seen that several branch blowing pipes are connected to the anti-blowing main pipe in the existing reverse cleaning structure, with small air volume and poor anti-blowing effect. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a wet granulator, which solves the problem that several branch blowing pipes are connected to the anti-blowing main pipe in the existing reverse cleaning structure, with small air volume and poor anti-blowing effect.

[0005] The utility model is realized as follows: a wet granulator includes a granulator body, a vacuum mechanism, and an anti-blowing mechanism. A filter and a feed inlet are provided on the granulator body. The vacuum mechanism and the anti-blowing mechanism are connected to the filter. A nozzle is provided at the air outlet end of the anti-blowing mechanism. The nozzle includes a first air outlet member and a second air outlet member sleeved on the first air outlet member. The first air outlet member is connected to the anti-blowing mechanism. A constriction is provided on the first air outlet member. The second air outlet member is communicated with the filter and an air intake channel can be formed between the second air outlet member and the first air outlet member.

[0006] Through a vacuum mechanism, the inside of the granulator body is subjected to vacuum treatment, so that the powder enters the granulator body from the feed port to complete vacuum feeding; during the vacuum feeding process, in order to avoid the influence of powder or other particles on the vacuum mechanism, a filter is provided on the granulator body, and the filter is connected to the vacuum mechanism. In order to ensure the effect of vacuum feeding, it is necessary to backflush the filter to avoid blocking the filter. Therefore, the backflush mechanism is also connected to the filter; the existing backflush mechanism uses a main pipe with multiple branch pipes connected to it to backflush the filters respectively to ensure the effect of vacuum feeding. However, the backflush air volume in this method is small and the effect is not ideal; the air outlet end of the backflush mechanism of the present utility model is provided with a nozzle, the first air outlet member of the nozzle is connected to the backflush mechanism, and the first air outlet member is provided with a constriction. Based on the Venturi effect, after the air comes out of the backflush mechanism and passes through the first air outlet member on the nozzle, due to the constriction, the wind speed will increase, and at the same time, a negative pressure environment will be formed outside the air outlet of the first air outlet member, so that the air intake passage outside the first air outlet member sucks in air volume from the periphery and enters the filter, so that the air coming out of the backflush mechanism not only has an increased wind speed but also an increased air volume, and the backflush effect on the filter is better than the prior art.

[0007] A further technical solution of the present utility model is that: the filter includes a flexible strip-shaped filter element, and the open end of the filter element faces the nozzle.

[0008] The flexible strip-shaped filter element, under the influence of the air coming out of the nozzle, in addition to the air itself blowing off the attachments on the filter element, because the filter element is a flexible strip structure, the filter element will also vibrate by itself under the action of the air, so as to further remove the attachments on the strip-shaped filter element.

[0009] A further technical solution of the present utility model is that: the filter further includes a mounting frame, the filter element is mounted on the mounting frame, and the cross section of the filter element is diamond-shaped.

[0010] The mounting frame is used to stretch the filter element, and the cross section of the filter element is diamond-shaped, which can effectively increase the filtering area and facilitate disassembly, cleaning and replacement.

[0011] A further technical solution of the present utility model is that: the backflush mechanism includes an annular pipe and a buffer tank communicated with the annular pipe, a plurality of nozzles are provided on the annular pipe, and the buffer tank is used for storing compressed gas.

[0012] Compressed air enters the annular pipe through the buffer tank and is blown out through a plurality of nozzles connected to the annular pipe. The nozzles are communicated with the filter element to backflush the filter element.

[0013] A further technical solution of the present utility model is that: the buffer tank and the annular pipe are communicated through a plurality of connecting pipes, and pulse valves are provided on the connecting pipes.

[0014] Multiple connecting pipes are connected to the buffer tank to increase the air volume of the compressed air entering the annular pipe. Among them, a pulse valve is used to control the pulse intermittent backwashing of the filter element, improving the powder cleaning effect and saving the feeding time.

[0015] A further technical solution of the present utility model is that the vacuum mechanism includes a high-efficiency filter and a vacuum pipeline connecting the high-efficiency filter and the filter.

[0016] The high-efficiency filter is used to filter the air in the vacuum pipeline.

[0017] A further technical solution of the present utility model is that the filter includes a filter chamber, and one end of the filter chamber extends into the granulator body and is hermetically connected to the granulator body.

[0018] The filter is hermetically connected to the granulator to ensure that the pressure inside the granulator body does not leak.

[0019] The beneficial effect of the present utility model: The air outlet end of the backwashing mechanism of the present utility model is provided with a nozzle. The first air outlet member of the nozzle is connected to the backwashing mechanism, and the first air outlet member is provided with a constriction. Based on the Venturi effect, after the air comes out of the backwashing mechanism and passes through the first air outlet member on the nozzle, due to the constriction, the wind speed will increase. At the same time, a negative pressure environment will be formed around the outer circumference of the air outlet of the first air outlet member, so that the air intake channel outside the first air outlet member sucks in air volume from the outer circumference and enters the filter, so that the air coming out of the backwashing mechanism not only has an increased wind speed but also an increased air volume, and the backwashing effect on the filter is better than the prior art. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of a wet granulator provided by the present utility model;

[0021] Figure 2 is a top view of a wet granulator provided by the present utility model;

[0022] Figure 3 is a top view of the connection structure of the filter, the vacuum mechanism and the backwashing mechanism provided by the present utility model;

[0023] Figure 4 is provided by the present utility model Figure 3 The sectional view taken along A-A in;

[0024] Figure 5 is a schematic structural diagram of the connection of the filter, the vacuum mechanism and the backwashing mechanism provided by the present utility model;

[0025] Figure 6 is a top view of the mounting bracket provided by the present utility model;

[0026] Figure 7It is a schematic structural diagram of the nozzle provided by the present utility model;

[0027] Figure 8 It is a cross-sectional view of the nozzle provided by the present utility model.

[0028] Reference numerals: 1. Granulator body,

[0029] 2. Filter, 21. Filter element, 22. Mounting bracket, 23. Filter chamber,

[0030] 3. Vacuum mechanism, 31. Vacuum pipeline,

[0031] 4. Backwashing mechanism, 41. Annular pipe, 42. Buffer tank, 43. Connecting pipe, 44. Pulse valve,

[0032] 5. Feed inlet,

[0033] 6. Nozzle, 61. First air outlet part, 611. Reduced opening, 62. Second air outlet part, 63. Air inlet channel, 11. Clamp, 12. Pressure gauge, 13. Air source treatment part, 14. Adapter. Specific embodiments

[0034] The following uses specific specific examples to illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model.

[0035] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limited conditions under which the present utility model can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear description and are not used to limit the scope within which the present utility model can be implemented. The change or adjustment of their relative relationships should also be regarded as the scope within which the present utility model can be implemented without substantial change in the technical content.

[0036] Example 1:

[0037] Figures 1-8A wet granulator is shown, comprising a granulator body 1, a vacuum mechanism 3, and a back-blowing mechanism 4. The granulator body 1 is provided with a filter 2 and a feed port 5. The vacuum mechanism 3 and the back-blowing mechanism 4 are connected to the filter 2. The back-blowing mechanism 4 is provided with a nozzle 6 at the air outlet end. The nozzle 6 comprises a first air outlet piece 61 and a second air outlet piece 62 sleeved on the first air outlet piece 61. The first air outlet piece 61 is connected to the back-blowing mechanism 4. The first air outlet piece 61 is provided with a constriction 611. The second air outlet piece 62 is communicated with the filter 2 and an air inlet channel 63 can be formed between the second air outlet piece 62 and the first air outlet piece 61.

[0038] In this embodiment, the second air outlet member is sleeved on the outside of the air outlet of the first air outlet member, and an air inlet passage in a negative pressure state is formed between the outer periphery of the air outlet of the first air outlet member and the inner side of the second air outlet member.

[0039] In this embodiment, the first air outlet member and the second air outlet member are both structures with upper and lower openings, and the first air outlet member is connected to the second air outlet member.

[0040] In this embodiment, a constriction is provided at one end of the second air outlet member that is connected to the filter mechanism.

[0041] In this embodiment, the nozzle can be disassembled from the back-blowing mechanism, and the installation is also convenient.

[0042] In this embodiment, the nozzle has a special curved shape, and the transition section adopts an arc transition. Plastic material is selected for 3D printing to ensure a smooth transition of the curved arc.

[0043] In this embodiment, the filter 2 includes a flexible strip-shaped filter element 21 , and the open end of the filter element 21 faces the nozzle 6 .

[0044] The flexible strip filter element, when affected by the wind coming out of the nozzle, in addition to the wind itself blowing off the attached objects on the filter element, because the filter element is a flexible strip structure, the filter element will also shake by itself under the action of the wind, thereby further removing the attached objects on the strip filter element.

[0045] In this embodiment, the strip filter element is a filter bag, and the top of the filter bag is aligned with the air outlet of the nozzle.

[0046] In this embodiment, the filter 2 further comprises a mounting frame 22 , and the filter element 21 is mounted on the mounting frame 22 . The cross section of the filter element 21 is rhombus-shaped.

[0047] The mounting frame is used to spread out the filter element, the cross section of which is diamond-shaped, which can effectively increase the filtering area and facilitate disassembly, cleaning and replacement.

[0048] In this embodiment, the backflush mechanism 4 includes an annular pipe 41 and a buffer tank 42 communicated with the annular pipe 41. A plurality of nozzles 6 are provided on the annular pipe 41, and the buffer tank 42 is used for storing compressed gas.

[0049] Compressed air enters the annular pipe through the buffer tank and is blown out through a plurality of nozzles connected to the annular pipe. The nozzles are communicated with the filter element to backflush the filter element.

[0050] In this embodiment, the nozzles are placed directly above the filter element, the opening of the filter element faces the air outlet of the nozzles, and one nozzle corresponds to one filter element for backflushing.

[0051] In this embodiment, the buffer tank 42 and the annular pipe 41 are communicated through a plurality of connecting pipes 43, and pulse valves 44 are provided on the connecting pipes 43.

[0052] A plurality of connecting pipes are communicated with the buffer tank, increasing the air volume of the compressed air entering the annular pipe. Among them, pulse valves are used for control, and the filter element is backflushed in a pulsed intermittent manner, improving the effect of powder cleaning and saving the feeding time.

[0053] In this embodiment, the pressure gauge 12 is connected to the buffer tank and is used for displaying the pressure of the compressed air inside the buffer tank.

[0054] In this embodiment, the air source treatment part 13 is connected to the buffer tank and is used for filtering the backflush compressed air.

[0055] In this embodiment, the adapter 14 is used for connecting the buffer tank, the pressure gauge, and the air source treatment part.

[0056] In this embodiment, the clamp 11 is used for installing and locking the filter on the granulator body.

[0057] In this embodiment, the vacuum mechanism 3 includes a high-efficiency filter and a vacuum pipeline 31 connecting the high-efficiency filter and the filter.

[0058] The high-efficiency filter is used for filtering the air in the vacuum pipeline.

[0059] In this embodiment, the vacuum mechanism is used to make the filter in a vacuum state through the vacuum pipeline, so as to perform vacuum feeding.

[0060] In this embodiment, the filter 2 includes a filter chamber 23, and one end of the filter chamber 23 extends into the granulator body 1 and is hermetically connected to the granulator body 1.

[0061] The filter is hermetically connected to the granulator to ensure that the pressure inside the granulator body does not leak.

[0062] Working principle of the present utility model: Through a vacuum mechanism, vacuum treatment is carried out inside the granulator body, so that powder enters the granulator body from the feed inlet to complete vacuum feeding; during the vacuum feeding process, in order to avoid the influence of powder or other particles on the vacuum mechanism, a filter is provided on the granulator body, and the filter is connected to the vacuum mechanism. In order to ensure the effect of vacuum feeding, it is necessary to backflush the filter to avoid blocking the filter, so the backflush mechanism is also connected to the filter; the existing backflush mechanism uses a main pipe with multiple branch pipes connected to backflush the filters respectively to ensure the vacuum feeding effect, but the backflush air volume in this method is small and the effect is not ideal; the air outlet end of the backflush mechanism of the present utility model is provided with a nozzle, the first air outlet part of the nozzle is connected to the backflush mechanism, and a constriction is provided on the first air outlet part. Based on the Venturi effect, after the air comes out of the backflush mechanism and passes through the first air outlet part of the nozzle, due to the constriction, the wind speed will increase, and at the same time, a negative pressure environment will be formed outside the air outlet of the first air outlet part, so that the air intake channel outside the first air outlet part sucks in air volume from the periphery and enters the filter, so that the air coming out of the backflush mechanism not only has an increased wind speed but also an increased air volume, and the backflush effect on the filter is better than the prior art.

[0063] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A wet granulator, comprising a granulator body (1), a vacuum mechanism (3), and a back-blowing mechanism (4), wherein the granulator body (1) is provided with a filter (2) and a feed inlet (5), and the vacuum mechanism (3) and the back-blowing mechanism (4) are connected to the filter (2), characterized in that: The back-blowing mechanism (4) is provided with a nozzle (6) at the air outlet end, the nozzle (6) comprising a first air outlet piece (61) and a second air outlet piece (62) sleeved on the first air outlet piece (61), the first air outlet piece (61) being connected to the back-blowing mechanism (4), the first air outlet piece (61) being provided with a constriction (611), the second air outlet piece (62) being connected to the filter (2) and forming an air intake channel (63) between the second air outlet piece (62) and the first air outlet piece (61).

2. A wet granulator according to claim 1, characterized in that: The filter (2) comprises a flexible strip-shaped filter element (21), wherein the open end of the strip-shaped filter element (21) faces the nozzle (6).

3. A wet granulator according to claim 2, characterized in that, The filter (2) further comprises a mounting frame (22), the filter element (21) being mounted on the mounting frame (22), and the filter element (21) has a rhombus-shaped cross section.

4. A wet granulator according to claim 1, characterized in that: The backflush mechanism (4) comprises an annular tube (41) and a buffer tank (42) connected to the annular tube (41), a plurality of nozzles (6) are provided on the annular tube (41), and the buffer tank (42) is used for storing compressed gas.

5. A wet granulator according to claim 4, characterized in that: The buffer tank (42) is connected to the annular pipe (41) via a plurality of connecting pipes (43), and a pulse valve (44) is provided on the connecting pipe (43).

6. A wet granulator according to claim 1, characterized in that: The vacuum mechanism (3) comprises a high-efficiency filter and a vacuum pipe (31) connecting the high-efficiency filter and the filter.

7. A wet granulator according to claim 1, characterized in that: The filter (2) comprises a filter cavity (23), one end of which extends into the granulator body (1) and is sealedly connected to the granulator body (1).

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