A high-efficiency wet granulator with good sealing performance

Abstract

The invention discloses a high-efficiency wet granulator with good sealing performance, comprising a pot body and a pot cover, wherein the inner end face of the pot cover is provided with a sealing ring, wherein the sealing ring is provided with an annular sealing cavity, wherein the annular sealing cavity is provided with a telescopic sealing ring sleeve, wherein the telescopic sealing ring sleeve can slide and telescope in the vertical direction of the annular sealing cavity, wherein the bottom face of the telescopic sealing ring sleeve is provided with an installation ring groove, wherein the installation ring groove is provided with an end face sealing ring that seals with the top face of the pot body. The invention can be retracted when the pot cover switch is translated, and collision interference will not occur when the pot cover switch is translated, and the operation is convenient; during granulation, multiple seals are formed between the pot body and the pot cover, ensuring a good sealing effect between the pot body and the pot cover during granulation, and a telescopic sealing device is used to replace the single sealing airbag structure in the prior art, thereby overcoming the sealing problem caused by the sealing airbag structure and performance, being able to maintain the seal stably for a long time, and being able to better carry out granulation production.

Description

Technical Field

[0001] The invention relates to the technical field of pharmaceuticals, and in particular to a high-efficiency wet granulator with good sealing performance. Background Art

[0002] The high-efficiency wet mixing granulator is a mechanical, electrical and pneumatic integrated equipment that turns powder into granules. It is suitable for mixing, granulating and granulating powdery loose materials in the pharmaceutical, food, chemical and other industries. It can also be used for dry powder mixing. The working principle of the high-efficiency wet mixing granulator is as follows: the powdery loose materials in the material cylinder (or pot body) are in a flowing state (turbulent state) under the action of the stirring paddle, and the spray gun injects the adhesive at the same time. The materials are fully mixed into thin strips, and are cut into wet granules by the high-speed rotating granulating knife. Then they enter the granulating device through the discharging device for granulation.

[0003] When the high-efficiency wet mixing granulator is in operation, in addition to the sealing between the stirring paddle, the granulating knife and the pot body, the upper opening of the pot body needs to be sealed with a pot cover to prevent the loose material dust in the pot body from being emitted to the outside of the pot body. The connection structure between the pot cover and the pot body in the prior art usually has a vertical flip-up structure and a horizontal translation structure. Since the pot cover usually needs to be installed with a spray gun or WIP cleaning gun, an observation mirror, a liquid adding bucket, and an air outlet filter system, the vertical flip-up pot cover is inconvenient to use, resulting in less and less application of the pot cover connection structure with a vertical flip-up structure, and more and more application of the pot cover connection structure with a horizontal translation structure.

[0004] When the pot cover connection structure with a horizontal translation structure is adopted, in order to ensure that the pot cover switch does not collide and interfere with the upper edge of the pot body when it is translated, a relatively large gap is usually left between the bottom surface of the pot cover and the top surface of the pot body; and in order to ensure the sealing effect between the pot body and the pot cover during the granulation process, for such a large gap, an inflatable sealing airbag is usually used in the prior art for sealing. The sealing airbag is usually installed in the groove body on the bottom surface of the pot cover. When working, the pot cover is translated to the top of the pot body and aligned, and then the air path is connected to inflate the sealing airbag, so that the sealing airbag is inflated and pressed downward to seal the top surface of the pot body. With this structure, its sealing effect is closely related to the performance of the sealing airbag, but the performance of many sealing airbags in the prior art is not very good. After a period of use, the sealing airbag is easy to harden and age, resulting in that it is not fully expanded or easily broken after inflation, resulting in poor sealing effect between the pot cover and the pot body. During granulation, loose material dust is easily emitted outside the pot body, affecting granulation production. Summary of the invention

[0005] In order to solve the above problems, the object of the present invention is to provide an efficient wet granulator with good sealing performance, in which a telescopic sealing device is arranged in the pot cover, and multiple seals are arranged in the telescopic sealing device, so that no collision interference occurs when the pot cover switch is translated, and the operation is convenient; during granulation, the sealing effect between the pot body and the pot cover is good, and the sealing device can maintain a stable seal for a long time, so that granulation production can be better carried out.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A high-efficiency wet granulator with good sealing performance comprises a pot body and a pot cover, wherein the inner end surface of the pot cover is provided with a sealing ring, an annular sealing cavity is provided in the sealing ring, a telescopic sealing ring sleeve is provided in the annular sealing cavity, the telescopic sealing ring sleeve can slide and telescope in the vertical direction of the annular sealing cavity, a mounting ring groove is provided on the bottom surface of the telescopic sealing ring sleeve, and an end face sealing ring which is sealed with the top surface of the pot body is provided in the mounting ring groove.

[0008] Furthermore, the side surface of the telescopic sealing ring sleeve is dynamically sealed with the side surface of the annular sealing chamber, at least two connecting rods are provided on the top of the telescopic sealing ring sleeve, and a guide seat for passing the connecting rod is provided on the pot cover. After passing through the guide seat, the connecting rod is connected to a driving cylinder provided on the pot cover, and the driving cylinder drives the telescopic sealing ring sleeve to slide and retract vertically through the connecting rod.

[0009] Furthermore, grooves are provided on both sides of the telescopic sealing ring sleeve, and a large sealing ring is provided in the groove. The large sealing ring is used to seal the telescopic sealing ring sleeve and the side wall of the annular sealing cavity; the top surface of the pot body is provided with a sealing groove edge that cooperates with the end face sealing ring.

[0010] Furthermore, the upper end of the connecting rod is detachably connected to the output shaft of the driving cylinder.

[0011] Furthermore, a threaded hole connected to the connecting rod is provided on the top of the telescopic sealing ring sleeve.

[0012] Furthermore, a small sealing ring is provided in the guide seat and seals with the connecting rod.

[0013] Furthermore, the pot cover is provided with a first air inlet connected to the annular sealing cavity, and compressed air is input through the first air inlet to form an airtight seal between the annular sealing cavity and the gap of the telescopic sealing ring sleeve.

[0014] Furthermore, a simplified solution is adopted, in which the side of the telescopic sealing ring sleeve is matched with the side of the annular sealing cavity in a sliding seal, the top of the telescopic sealing ring sleeve is connected to one end of an elastic pull rod, the other end of the elastic pull rod is connected to the pot cover, and the pot cover is provided with a second air inlet and an exhaust port connected to the annular sealing cavity, the second air inlet and the exhaust port are controlled and connected to a compressed air source, the compressed air input from the second air inlet extends the telescopic sealing ring sleeve downward, and after exhaust, the elastic pull rod retracts the telescopic sealing ring sleeve upward.

[0015] Furthermore, the pot cover is provided with a mounting hole for passing the elastic pull rod, the other end of the elastic pull rod passes through the mounting hole and is fixed on the pot cover, and a sealing cover is provided outside the mounting hole.

[0016] Furthermore, the elastic pull rod is a tension spring or an elastic rubber rod.

[0017] The present invention has the following beneficial effects:

[0018] 1. The present invention provides a telescopic sealing device in the pot cover, and an end face sealing ring which is sealed with the top face of the pot body is further provided in the telescopic sealing device. The telescopic sealing device can be retracted when the pot cover switch is translated, and no collision interference occurs when the pot cover switch is translated, and the operation is convenient. The telescopic sealing device forms multiple seals between the pot body and the pot cover during granulation, thereby ensuring a good sealing effect between the pot body and the pot cover during granulation. In addition, the telescopic sealing device is used to replace the single sealing airbag structure in the prior art, thereby overcoming the sealing problem caused by the sealing airbag structure and performance, being able to maintain a stable seal for a long time, and being able to better carry out granulation production.

[0019] 2. In the present invention, a telescopic sealing device is formed by an annular sealing chamber and a telescopic sealing ring sleeve matched with a dynamic seal. The telescopic sealing ring sleeve is driven by a driving cylinder connected by a connecting rod to ensure reliable telescopic movement. In addition, an air inlet can be provided in the annular sealing chamber to input compressed air to form an air seal between the annular sealing chamber and the telescopic sealing ring sleeve gap to prevent loose material dust from entering the annular sealing chamber, thereby ensuring that a stable seal can be maintained for a long time.

[0020] 3. The telescopic sealing ring sleeve in the telescopic sealing device of the present invention can also achieve telescopic movement by using an elastic pull rod and compressed air. The compressed air input into the annular sealing cavity through the air inlet is used to push the telescopic sealing ring sleeve to extend downward (and the input compressed air also has an air-sealing effect). After the annular sealing cavity is exhausted, the telescopic sealing ring sleeve retracts upward under the pull of the elastic pull rod. As a simplified solution, a driving cylinder may not be used.

[0021] 4. The telescopic sealing ring sleeve, sealing ring, connecting rod and elastic pull rod in the present invention can be disassembled for cleaning, and there is no dead corner for cleaning in the annular sealing cavity. The components are easy to disassemble and install, which complies with the GMP pharmaceutical production specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional schematic diagram of one of the high-efficiency wet granulators with good sealing performance of the present invention;

[0023] Figure 2 A schematic cross-sectional view of one of the high-efficiency wet granulators with good sealing performance of the present invention;

[0024] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0025] Figure 4 It is a three-dimensional schematic diagram of the pot cover part of the present invention;

[0026] Figure 5 It is a three-dimensional schematic diagram of the second high-efficiency wet granulator with good sealing performance of the present invention;

[0027] Figure 6 The cross-sectional schematic diagram is a second high-efficiency wet granulator with good sealing performance according to the present invention.

[0028] Description of reference numerals:

[0029] 1. Pot body; 11. Sealing groove; 2. Pot cover; 21. Guide seat; 22. Small sealing ring; 23. First air inlet; 24. Second air inlet; 25. Exhaust port; 26. Mounting hole; 27. Sealing cover; 3. Sealing ring; 31. Annular sealing chamber; 4. Telescopic sealing ring sleeve; 41. Mounting ring groove; 42. Threaded hole; 5. End face sealing ring; 6. Connecting rod; 7. Driving cylinder; 8. Large sealing ring; 9. Elastic pull rod. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0031] Embodiment 1:

[0032] See also Figure 1-4 As shown, a high-efficiency wet granulator with good sealing performance comprises a pot body 1 and a pot cover 2, wherein the inner end surface of the pot cover 2 is provided with a sealing ring 3, the sealing ring 3 is integrally arranged in the pot cover 2, an annular sealing cavity 31 is provided in the sealing ring 3, a telescopic sealing ring sleeve 4 is provided in the annular sealing cavity 31, the telescopic sealing ring sleeve 4 can slide and telescope in the vertical direction of the annular sealing cavity 31, a mounting ring groove 41 is provided on the bottom surface of the telescopic sealing ring sleeve 4, an end face sealing ring 5 which is sealed with the top surface of the pot body 1 is provided in the mounting ring groove 41.

[0033] The side of the telescopic sealing ring sleeve 4 is in dynamic sealing cooperation with the side of the annular sealing chamber 31. At least two connecting rods 6 are arranged on the top of the telescopic sealing ring sleeve 4. The pot cover 2 is provided with a guide seat 21 through which the connecting rod 6 is penetrated. The connecting rod 6 passes through the guide seat 21 and is connected to a driving cylinder 7 arranged on the pot cover 2. The driving cylinder 7 drives the telescopic sealing ring sleeve 4 to slide and telescope vertically through the connecting rod 6. The driving cylinder 7 is connected to the granulator controller and the pneumatic circuit control. A sealing cover can be arranged outside the driving cylinder 7 to ensure cleaning. Three sets of connecting rods 6 and driving cylinders 7 are used in this embodiment.

[0034] Grooves are provided on both sides of the telescopic sealing ring sleeve 4, and large sealing rings 8 are provided in the grooves. The large sealing rings 8 are used to seal the telescopic sealing ring sleeve 4 and the side wall of the annular sealing cavity 31; the top surface of the pot body 1 is provided with a sealing groove edge 11 that cooperates with the end surface sealing ring 5. There is at least one large sealing ring 8 on each side, and usually two can be provided to ensure the sealing effect.

[0035] The upper end of the connecting rod 6 is detachably connected to the output shaft of the driving cylinder 7. The top of the telescopic sealing ring sleeve 4 is provided with a threaded hole 42 connected to the connecting rod 6. The guide seat 21 is provided with a small sealing ring 22 that seals with the connecting rod 6.

[0036] The pot cover 2 is provided with a first air inlet 23 which is in communication with the annular sealing cavity 31 . The first air inlet 23 is used to input compressed air to form an airtight seal between the annular sealing cavity 31 and the gap between the telescopic sealing ring sleeve 4 .

[0037] Embodiment 2:

[0038] See also Figure 5-6 As shown, a simplified scheme is adopted, a high-efficiency wet granulator with good sealing performance, comprising a pot body 1 and a pot cover 2, wherein the inner end face of the pot cover 2 is provided with a sealing ring 3, the sealing ring 3 is integrally arranged in the pot cover 2, an annular sealing cavity 31 is provided in the sealing ring 3, a telescopic sealing ring sleeve 4 is provided in the annular sealing cavity 31, the telescopic sealing ring sleeve 4 can slide and telescope in the vertical direction of the annular sealing cavity 31, the bottom surface of the telescopic sealing ring sleeve 4 is provided with a mounting ring groove 41, and the mounting ring groove 41 is provided with an end face sealing ring 5 which is sealed with the top surface of the pot body 1.

[0039] The side of the telescopic sealing ring sleeve 4 is in sliding sealing cooperation with the side of the annular sealing chamber 31. The top of the telescopic sealing ring sleeve 4 is connected to one end of an elastic pull rod 9, and the other end of the elastic pull rod 9 is connected to the pot cover 2. The pot cover 2 is provided with a second air inlet 24 and an exhaust port 25 connected to the annular sealing chamber 31. The second air inlet 24 and the exhaust port 25 are connected to the compressed air source control. The compressed air input from the second air inlet 24 extends the telescopic sealing ring sleeve 4 downward. After exhaust, the elastic pull rod 9 retracts the telescopic sealing ring sleeve 4 upward. The second air inlet 24 and the exhaust port 25 are connected to a control valve for control. There are at least two elastic pull rods 9, and three are used in this embodiment.

[0040] The pot cover 2 is provided with a mounting hole 26 for inserting the elastic pull rod 9, and the other end of the elastic pull rod 9 is fixed to the pot cover 2 after passing through the mounting hole 26, and a sealing cover 27 is provided outside the mounting hole 26. The elastic pull rod 9 is a stainless steel tension spring or an elastic rubber rod. The above components are made of materials that meet pharmaceutical standards.

[0041] When the pot cover 2 is opened and closed, the telescopic sealing ring sleeve 4 can be retracted under the action of the driving cylinder 7 or the elastic pull rod 9, and no collision or interference will occur when the pot cover 2 is opened and closed; when granulating, the telescopic sealing ring sleeve 4 is extended under the push of the driving cylinder 7 or the compressed air, so that the end face sealing ring 5 in the mounting ring groove 41 is sealed and matched with the top surface of the pot body 1; the large sealing ring 8 can seal the telescopic sealing ring sleeve 4 and the side wall of the annular sealing cavity 31; the first air inlet 23 or the second air inlet 24 inputs compressed air to form an airtight seal between the annular sealing cavity 31 and the gap between the telescopic sealing ring sleeve 4, and a multiple composite sealing structure is used to replace the single sealing airbag structure in the prior art, so that the overall sealing effect is good and the sealing can be maintained reliably for a long time.

[0042] The above description is only a specific implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An efficient wet granulator with good sealing performance, comprising a pot body (1) and a pot cover (2), characterized in that: The inner end surface of the pot cover (2) is provided with a sealing ring (3), an annular sealing cavity (31) is provided in the sealing ring (3), a telescopic sealing ring sleeve (4) is provided in the annular sealing cavity (31), the telescopic sealing ring sleeve (4) can slide and telescope in the vertical direction of the annular sealing cavity (31), the bottom surface of the telescopic sealing ring sleeve (4) is provided with a mounting ring groove (41), the mounting ring groove (41) is provided with an end face sealing ring (5) which is in sealing cooperation with the top surface of the pot body (1); the side surface of the telescopic sealing ring sleeve (4) is in dynamic sealing cooperation with the side surface of the annular sealing cavity (31), at least two connecting rods (6) are provided on the top of the telescopic sealing ring sleeve (4), the pot cover (2) is provided with a guide seat (21) through which the connecting rod (6) is passed, and a small sealing ring which is in sealing cooperation with the connecting rod (6) is provided in the guide seat (21). (22); the connecting rod (6) passes through the guide seat (21) and is then connected to a driving cylinder (7) arranged on the pot cover (2); the driving cylinder (7) drives the telescopic sealing ring (4) to slide and telescope vertically through the connecting rod (6); grooves are arranged on both sides of the telescopic sealing ring (4), and a large sealing ring (8) is arranged in the groove, and the large sealing ring (8) is used to seal the telescopic sealing ring (4) and the side wall of the annular sealing cavity (31); the top surface of the pot body (1) is provided with a sealing groove edge (11) that cooperates with the end face sealing ring (5); the pot cover (2) is provided with a first air inlet (23) that is connected to the annular sealing cavity (31), and compressed air is input through the first air inlet (23) to form an airtight seal between the annular sealing cavity (31) and the gap between the telescopic sealing ring (4).

2. The high-efficiency wet granulator with good sealing performance according to claim 1, characterized in that: The upper end of the connecting rod (6) and the output shaft of the driving cylinder (7) are detachably connected.

3. The high-efficiency wet granulator with good sealing performance according to claim 1, characterized in that: The top of the telescopic sealing ring sleeve (4) is provided with a threaded hole (42) connected to the connecting rod (6).

4. The high-efficiency wet granulator with good sealing performance according to claim 1, characterized in that: The side of the telescopic sealing ring sleeve (4) and the side of the annular sealing chamber (31) are in sliding sealing cooperation, the top of the telescopic sealing ring sleeve (4) is connected to one end of an elastic pull rod (9), the other end of the elastic pull rod (9) is connected to the pot cover (2), and the pot cover (2) is provided with a second air inlet (24) and an exhaust port (25) which are connected to the annular sealing chamber (31), the second air inlet (24) and the exhaust port (25) are connected to the compressed air source control, the compressed air input from the second air inlet (24) extends the telescopic sealing ring sleeve (4) downward, and after exhaust, the elastic pull rod (9) retracts the telescopic sealing ring sleeve (4) upward.

5. The high-efficiency wet granulator with good sealing performance according to claim 4, characterized in that: The pot cover (2) is provided with a mounting hole (26) for passing the elastic pull rod (9); the other end of the elastic pull rod (9) passes through the mounting hole (26) and is fixed to the pot cover (2); and a sealing cover (27) is provided outside the mounting hole (26).

6. The high-efficiency wet granulator with good sealing performance according to claim 4, characterized in that: The elastic pull rod (9) is a tension spring or an elastic rubber rod.

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