A double cone powder mixer

Abstract

The present invention relates to the technical field of mixers, and specifically to a double-cone powder mixer, comprising a frame, wherein a left rotary shaft and a right rotary shaft are arranged on the frame, and a rotary cylinder is installed at opposite ends of the left rotary shaft and the right rotary shaft, and suction ports and tapered tubes are respectively arranged at two ends of the rotary cylinder, an isolation cover is arranged at one end of the rotary cylinder having the suction port, a butterfly valve is arranged between the tapered tube and the rotary cylinder, cavities are arranged at the axes of the left rotary shaft and the right rotary shaft, a feed port is arranged at the side of the rotary cylinder close to one end of the suction port, the cavity inside the left rotary shaft is connected with the feed port through the feed pipe, the cavity inside the left rotary shaft is connected with the end of the tapered tube through the discharge pipe, the cavity inside the right rotary shaft is connected with the suction port through the suction pipe, the cavity inside the right rotary shaft is connected with the tapered tube through the inflation pipe, and control valves are arranged on the feed pipe, the suction pipe, the inflation pipe and the discharge pipe.

Description

Technical Field

[0001] The invention relates to the technical field of mixers, in particular to a double-cone powder mixer. Background Art

[0002] In the pharmaceutical industry, the powder mixer is an important equipment used to mix the powders of different ingredients. The double cone powder mixer has been widely used in the drying and mixing of synthetic drugs due to its unique structure and performance.

[0003] However, the existing double cone powder mixer needs to open the upper or lower feed port for manual operation when feeding or unloading, which makes the inside of the equipment directly contact with the external environment, and is prone to dust leakage. Under certain conditions, such as encountering a fire source or static electricity, these dusts will cause explosions, causing serious harm to personnel and equipment; and manual feeding and unloading require operators to perform heavy physical labor, which is not only inefficient, but also easy to cause injuries due to operator fatigue; because in the pharmaceutical industry, the requirements for sterility are very strict, any contamination may lead to product quality problems, and when feeding or unloading, the inside of the equipment is in direct contact with the external environment, it is easy to be contaminated by the external environment, thereby affecting product quality. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a double-cone powder mixer to solve the problems existing in the above-mentioned background technology.

[0005] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0006] A double-cone powder mixer comprises a frame, a left rotating shaft and a right rotating shaft are coaxially arranged on the frame, and a rotating cylinder is installed at opposite ends of the left rotating shaft and the right rotating shaft, and suction ports and tapered tubes are respectively arranged at two ends of the rotating cylinder, an isolation cover is arranged inside the rotating cylinder having an end of the suction port, a butterfly valve is arranged between the tapered tube and the rotating cylinder, a cavity is arranged at the axis center of the left rotating shaft and the right rotating shaft, a feed port is arranged on the side of the rotating cylinder close to one end of the suction port, the cavity inside the left rotating shaft is connected with the feed port through the feed pipe, the cavity inside the left rotating shaft is connected with the end of the tapered tube through the discharge pipe, the cavity inside the right rotating shaft is connected with the suction port through the suction pipe, and the cavity inside the right rotating shaft is connected with the side of the tapered tube through the inflation pipe, and control valves are arranged on the feed pipe, the suction pipe, the inflation pipe and the discharge pipe.

[0007] Preferably, the control valve on the feed pipe is a first diaphragm valve, the control valve on the suction pipe is a second diaphragm valve, the control valve on the inflation pipe is a third diaphragm valve, and the control valve on the discharge pipe is a fourth diaphragm valve.

[0008] Preferably, the left rotating shaft and the right rotating shaft are both mounted on the frame via bearings, a sprocket is provided on the right rotating shaft, an explosion-proof motor and a reducer are provided on the frame, the power output end of the explosion-proof motor drives the reducer via a belt, and the power output end of the reducer is connected to the sprocket on the right rotating shaft via a chain.

[0009] Preferably, a left pipe is installed at one end of the left rotating shaft away from the rotating cylinder, and a right pipe is installed at one end of the right rotating shaft away from the rotating cylinder. The left pipe is used for feeding and discharging, and the right pipe is used for vacuuming and inflation.

[0010] Preferably, a lip seal is provided at the connection between the left pipe and the left rotating shaft, and a lip seal is also provided at the connection between the right pipe and the right rotating shaft. A purge pipe is provided at the connection between the left pipe and the left rotating shaft and at the connection between the right pipe and the right rotating shaft. One end of the purge pipe is connected to an external air source, and the other end of the purge pipe is arranged toward the lip seal. The contact parts of the left pipe and the right pipe with the lip seal are both surface hardened with a ceramic lining.

[0011] Preferably, the left pipeline and the left rotating shaft as well as the right pipeline and the right rotating shaft are respectively connected via flanges.

[0012] Preferably, the lip seal is made of polytetrafluoroethylene.

[0013] The beneficial effects of the embodiments of the present invention are:

[0014] 1. When it is necessary to mix powders of multiple different active ingredients in this device, the third diaphragm valve, the fourth diaphragm valve and the butterfly valve are closed, and the first diaphragm valve and the second diaphragm valve are opened. The external powder can enter the interior of the rotary cylinder from the cavity inside the left rotary shaft through the feed pipe under the transportation of gas. At this time, since the right rotary shaft is connected to an external device, the external device can perform vacuum operation, so the gas entering the interior of the rotary cylinder can be sucked away by the external device through the suction pipe and the right rotary shaft. Since an isolation cover is provided on the inner side of the suction port end of the rotary cylinder, the powder can be separated from the gas to ensure that the powder can remain in the rotary cylinder. Since the left rotary shaft end uses gas to transport the powder to the interior of the rotary cylinder and cooperates with the external device at the right rotary shaft end to perform vacuum operation, the smoothness of the transportation of the powder to the interior of the rotary cylinder can be ensured. When enough powder is transported to the interior of the rotary cylinder, the first diaphragm valve and the second diaphragm valve are closed at the same time, and the rotary cylinder starts to rotate to mix the powder to ensure that the powder is fully mixed. When the powder mixing is completed and the mixed powder in the rotating cylinder needs to be discharged, the rotating cylinder is adjusted to the position where the conical tube faces downward, and then the butterfly valve, the third diaphragm valve and the fourth diaphragm valve are opened, and the mixed powder in the rotating cylinder falls into the port connected to the conical tube and the discharge pipe, and the external suction device can suck the mixed powder that continuously falls into the conical tube through the left rotating shaft and the discharge pipe. At this time, the equipment outside the right rotating shaft works, and nitrogen is filled into the side of the conical tube through the right rotating shaft and the inflation pipe, so that the mixed powder in the conical tube can be loosened, ensuring that all the mixed powder in the rotating cylinder can be discharged from the rotating cylinder through the discharge pipe. The whole process does not need to open the rotating cylinder, and the gas and powder are transported by external equipment to avoid contact between the powder and the external environment, resulting in contamination of the powder, thereby improving the production quality of the medicine, and does not require operators to feed and unload, which can reduce the labor intensity of operators, effectively avoid leakage of powder, and cause explosion, thereby improving the safety of powder production.

[0015] 2. The explosion-proof motor of this device can avoid dust explosion caused by electric sparks during motor operation, thereby ensuring production safety; the reducer can control the speed, increase torque, improve work efficiency and adapt to different load conditions.

[0016] 3. The device can ensure the stability of the connection through the flange connection, and the lip seal is set at the flange connection to ensure the sealing of the flange connection and avoid leakage of powder; the lip seal made of polytetrafluoroethylene has excellent high temperature resistance, chemical resistance and oil resistance, and is suitable for sealing under extreme working conditions.

[0017] 4. When the external equipment of the device evacuates the inside of the rotating cylinder through the right pipe and the right rotating shaft, a small amount of finer powder will pass through the isolation cover into the exhaust pipe, and then accumulate at the lip seal position where the right pipe and the right rotating shaft are connected. When the mixed powder inside the rotating cylinder needs to be discharged, a small amount of dust will also accumulate on the lip seal at the left pipe and the left rotating shaft. If it is not cleaned for a long time, it will not only corrode the lip seal, but also easily breed bacteria, thereby increasing the risk of microbial contamination and affecting the quality and safety of the medicine. By arranging a purge pipe at the lip seal, the purge pipe is connected to an external air source. When the device is working, the high-pressure gas generated by the external air source can be blown to the lip seal through the purge pipe, which can effectively clean the accumulated powder at the lip seal, meet the sterility requirements during powder processing, and do not require operators to clean it, effectively reducing the labor intensity of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 for Figure 1 A magnified view of the local structure.

[0020] In the figure: 1. frame; 2. left rotary shaft; 3. right rotary shaft; 4. rotary cylinder; 5. left pipeline; 6. right pipeline; 7. lip seal; 8. purge pipe; 9. explosion-proof motor; 10. belt; 11. reducer; 12. chain; 13. sprocket; 14. isolation cover; 15. suction port; 16. conical pipe; 17. butterfly valve; 18. feed pipe; 19. first diaphragm valve; 20. suction pipe; 21. second diaphragm valve; 22. inflation pipe; 23. third diaphragm valve; 24. discharge pipe; 25. fourth diaphragm valve. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Embodiment 1

[0023] A double cone powder mixer, such as Figure 1-Figure 2As shown, it includes a frame 1, on which a left rotating shaft 2 and a right rotating shaft 3 are coaxially arranged, a rotating cylinder 4 is installed at the opposite ends of the left rotating shaft 2 and the right rotating shaft 3, and a suction port 15 and a conical tube 16 are respectively arranged at both ends of the rotating cylinder 4, and an isolation cover 14 is arranged inside the end of the rotating cylinder 4 having the suction port 15, and a butterfly valve 17 is arranged between the conical tube 16 and the rotating cylinder 4, and the axis centers of the left rotating shaft 2 and the right rotating shaft 3 are both provided with cavities, and the rotating cylinder 4 is close to A feed port is provided on the side of one end of the suction port 15, the cavity inside the left rotary shaft 2 is connected to the feed port through the feed pipe 18, the cavity inside the left rotary shaft 2 is connected to the end of the tapered tube 16 through the discharge pipe 24, the cavity inside the right rotary shaft 3 is connected to the suction port 15 through the suction pipe 20, the cavity inside the right rotary shaft 3 is connected to the side of the tapered tube 16 through the inflation pipe 22, and control valves are provided on the feed pipe 18, the suction pipe 20, the inflation pipe 22 and the discharge pipe 24. The control valve on the feed pipe 18 is a first diaphragm valve 19, the control valve on the suction pipe 20 is a second diaphragm valve 21, the control valve on the inflation pipe 22 is a third diaphragm valve 23, and the control valve on the discharge pipe 24 is a fourth diaphragm valve 25.

[0024] When it is necessary to mix a plurality of powders of different active ingredients, the third diaphragm valve 23, the fourth diaphragm valve 25 and the butterfly valve 17 are closed, and the first diaphragm valve 19 and the second diaphragm valve 21 are opened. The external powder can enter the rotating cylinder 4 from the cavity inside the left rotating shaft 2 through the feed pipe 18 under the conveyance of gas. At this time, since the right rotating shaft 3 is connected to an external device, the external device can perform vacuum operation. Therefore, the gas entering the rotating cylinder 4 can be sucked away by the external device through the suction pipe 20 and the right rotating shaft 3. An isolation cover 14 is provided inside the end of the suction port 15, so that the powder can be separated from the gas, ensuring that the powder can remain inside the rotary cylinder 4. Since the end of the left rotary shaft 2 uses gas to transport the powder to the inside of the rotary cylinder 4 and cooperates with the external equipment at the end of the right rotary shaft 3 to perform vacuuming, it can ensure that the powder is smoothly transported to the inside of the rotary cylinder 4. When enough powder is transported to the inside of the rotary cylinder 4, the first diaphragm valve 19 and the second diaphragm valve 21 are closed at the same time, and the rotary cylinder 4 starts to rotate to mix the powder, ensuring that the powder is fully mixed;

[0025] When the powder mixing is completed and the mixed powder in the rotating cylinder 4 needs to be discharged, the rotating cylinder 4 is adjusted to the position where the conical tube 16 faces downward, and then the butterfly valve 17, the third diaphragm valve 23 and the fourth diaphragm valve 25 are opened, and the mixed powder in the rotating cylinder 4 falls into the port where the conical tube 16 and the discharge pipe 24 are connected. The external suction device can suck the mixed powder that continuously falls into the conical tube 16 through the left rotating shaft 2 and the discharge pipe 24. At this time, the equipment outside the right rotating shaft 3 works, and the mixed powder is discharged to the conical tube through the right rotating shaft 3 and the inflation pipe 22. The side of 16 is filled with nitrogen, which can loosen the mixed powder in the conical tube 16, ensuring that all the mixed powder in the rotary cylinder 4 can be discharged from the rotary cylinder 4 through the discharge pipe 24. The rotary cylinder 4 does not need to be opened during the whole process, and the gas and powder are transported by external equipment to avoid contact between the powder and the external environment, resulting in contamination of the powder, thereby improving the production quality of the medicine, and there is no need for operators to feed and unload, which can reduce the labor intensity of operators, effectively avoid leakage of powder, which may cause explosion, and improve the safety of powder production.

[0026] The left rotating shaft 2 and the right rotating shaft 3 are both mounted on the frame 1 through bearings, a sprocket 13 is arranged on the right rotating shaft 3, an explosion-proof motor 9 and a reducer 11 are arranged on the frame 1, the power output end of the explosion-proof motor 9 drives the reducer 11 through a belt 10, and the power output end of the reducer 11 is connected to the sprocket 13 on the right rotating shaft 3 through a chain 12.

[0027] When the powder needs to be mixed, the explosion-proof motor 9 is started, and the power output end of the explosion-proof motor 9 can drive the reducer 11 to operate through the belt 10. When the reducer 11 is working, the chain 12 and the sprocket 13 on the right rotating shaft 3 are matched, so that the right rotating shaft 3 drives the rotating cylinder 4 to rotate on the frame 1, and the powder inside the rotating cylinder 4 is fully mixed. The explosion-proof motor 9 can avoid the generation of electric sparks during the operation of the motor to cause dust explosion, thereby ensuring production safety; the reducer 11 can control the rotation speed, increase the torque, improve the working efficiency and adapt to different load conditions.

[0028] A left pipe 5 is installed at one end of the left rotating shaft 2 away from the rotating cylinder 4, and a right pipe 6 is installed at one end of the right rotating shaft 3 away from the rotating cylinder 4. The left pipe 5 is used for feeding and discharging, and the right pipe 6 is used for exhausting and inflating. A lip seal 7 is provided at the connection between the left pipe 5 and the left rotating shaft 2, and a lip seal 7 is also provided at the connection between the right pipe 6 and the right rotating shaft 3.

[0029] The left pipe 5 and the right pipe 6 can be connected to external equipment respectively to realize the work of feeding and discharging materials into the rotating cylinder 4, as well as the effect of evacuating the inside of the rotating cylinder 4 and blowing gas to the conical tube 16, thereby ensuring the smoothness of feeding and discharging materials and improving work efficiency. In addition, the lip seal 7 can ensure the sealing of the connection to avoid leakage of powder.

[0030] The left pipe 5 and the left rotary shaft 2 as well as the right pipe 6 and the right rotary shaft 3 are respectively connected via flanges. The lip seal 7 is made of polytetrafluoroethylene.

[0031] The stability of the connection can be ensured by connecting with the flange, and the sealing of the flange connection can be ensured by setting the lip seal 7 at the flange connection to avoid leakage of medicine powder; the lip seal 7 made of polytetrafluoroethylene material has excellent chemical resistance, wear resistance, self-lubrication, high temperature resistance and wide media adaptability.

[0032] Embodiment 2

[0033] On the basis of the first embodiment, a purge pipe 8 is provided at the connection between the left pipe 5 and the left rotating shaft 2, and at the connection between the right pipe 6 and the right rotating shaft 3. One end of the purge pipe 8 is connected to the external air source, and the other end of the purge pipe 8 is arranged toward the lip seal 7. The contact parts of the left pipe 5 and the right pipe 6 with the lip seal 7 are surface hardened with a ceramic lining.

[0034] When the external equipment evacuates the inside of the rotating cylinder 4 through the right pipe 6 and the right rotating shaft 3, a small amount of finer powder will pass through the isolation cover 14 into the exhaust pipe, and then accumulate at the lip seal 7 at the connection between the right pipe 6 and the right rotating shaft 3. When the mixed powder inside the rotating cylinder 4 needs to be discharged, a small amount of dust will also accumulate on the lip seal 7 at the left pipe 5 and the left rotating shaft 2. If it is not cleaned for a long time, it will not only corrode the lip seal 7, but also easily breed bacteria, thereby increasing the risk of microbial contamination and affecting the quality and safety of the medicine. By arranging a purge pipe 8 at the lip seal 7, the purge pipe 8 is connected to the external air source. When the device is working, the high-pressure gas generated by the external air source can be blown to the lip seal 7 through the purge pipe 8, which can effectively clean the accumulated powder at the lip seal 7, meet the sterility requirements during powder processing, and do not require operators to clean it, effectively reducing the labor intensity of operators; ceramic hardening treatment can increase its wear resistance and smoothness.

[0035] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A double cone powder mixer, comprising a frame (1), wherein a left rotary shaft (2) and a right rotary shaft (3) are coaxially arranged on the frame (1), and a rotary cylinder (4) is installed at opposite ends of the left rotary shaft (2) and the right rotary shaft (3), characterized in that: The two ends of the rotary cylinder (4) are respectively provided with a suction port (15) and a conical tube (16); an isolation cover (14) is provided inside the end of the rotary cylinder (4) having the suction port (15); a butterfly valve (17) is provided between the conical tube (16) and the rotary cylinder (4); the axis centers of the left rotary shaft (2) and the right rotary shaft (3) are both provided with a cavity; a feed port is provided on the side of the rotary cylinder (4) close to the end of the suction port (15); the cavity inside the left rotary shaft (2) is connected to the feed port; The left rotating shaft (2) is connected to the feeding port through the feeding pipe (18), the cavity inside the left rotating shaft (2) is connected to the end of the conical tube (16) through the discharging pipe (24), the cavity inside the right rotating shaft (3) is connected to the suction port (15) through the suction pipe (20), and the cavity inside the right rotating shaft (3) is connected to the side of the conical tube (16) through the inflation pipe (22), and the feeding pipe (18), the suction pipe (20), the inflation pipe (22) and the discharging pipe (24) are all provided with control valves.

2. A double cone powder mixer as claimed in claim 1, characterized in that: The control valve on the feed pipe (18) is a first diaphragm valve (19), the control valve on the suction pipe (20) is a second diaphragm valve (21), the control valve on the inflation pipe (22) is a third diaphragm valve (23), and the control valve on the discharge pipe (24) is a fourth diaphragm valve (25).

3. A double cone powder mixer as claimed in claim 2, characterized in that: The left rotating shaft (2) and the right rotating shaft (3) are both mounted on the frame (1) via bearings; a sprocket (13) is arranged on the right rotating shaft (3); an explosion-proof motor (9) and a reducer (11) are arranged on the frame (1); a power output end of the explosion-proof motor (9) drives the reducer (11) via a belt (10); and a power output end of the reducer (11) is connected to the sprocket (13) on the right rotating shaft (3) via a chain (12).

4. A double cone powder mixer as claimed in claim 3, characterized in that: A left pipe (5) is installed at one end of the left rotating shaft (2) away from the rotating cylinder (4), and a right pipe (6) is installed at one end of the right rotating shaft (3) away from the rotating cylinder (4). The left pipe (5) is used for feeding and discharging materials, and the right pipe (6) is used for exhausting and inflating.

5. A double cone powder mixer as claimed in claim 4, characterized in that: A lip seal (7) is provided at the connection between the left pipe (5) and the left rotating shaft (2), and a lip seal (7) is also provided at the connection between the right pipe (6) and the right rotating shaft (3). A purge pipe (8) is provided at the connection between the left pipe (5) and the left rotating shaft (2) and at the connection between the right pipe (6) and the right rotating shaft (3). One end of the purge pipe (8) is connected to an external air source, and the other end of the purge pipe (8) is arranged toward the lip seal (7). The contact parts of the left pipe (5) and the right pipe (6) with the lip seal (7) are both subjected to a surface hardening treatment with a ceramic lining.

6. A double cone powder mixer as claimed in claim 5, characterized in that: The left pipeline (5) and the left rotating shaft (2) as well as the right pipeline (6) and the right rotating shaft (3) are respectively connected via flanges.

7. A double cone powder mixer as claimed in claim 6, characterized in that: The lip seal (7) is made of polytetrafluoroethylene.

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