Cooling device for preparing lipoic acid particles by planetary screw extruder

Abstract

The utility model belongs to the technical field of lipoic acid production, and particularly discloses a cooling device for preparing lipoic acid particles by a planetary screw extruder, which comprises a rack body, an oil cooler for circulating refrigeration of conduction oil, and a planetary extrusion mechanism arranged in the rack body, the planetary extrusion mechanism comprises a driving extrusion roller and at least four planetary screws, the driving extrusion roller rotates in the rack body, the planetary screws are arranged in the rack body and meshed with the driving extrusion roller through planetary gears, the oil cooler is fixedly installed in the driving box, an oil storage cavity is formed in the driving extrusion roller, and an oil outlet is formed in the oil storage cavity. According to the planetary screw extruder cooling device, it can be guaranteed that the cooling effect of each area of the planetary screw extruder is consistent, the phenomenon that the temperature of cooling water is directly increased by front-end heat is avoided, and the heat dissipation uniformity of the device is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of thioctic acid production, and in particular relates to a cooling device for preparing thioctic acid particles by a planetary screw extruder. Background Art

[0002] Lipoic acid is a strong antioxidant that can effectively remove free radicals and is widely used in medicine and food. Lipoic acid granules are made by mixing and shearing lipoic acid fine powder, fillers, disintegrants and binders into wet granules, which are then dried and sliced. The planetary screw extruder is one of the main equipment in the production line. Due to the high-speed turnover and high-speed rotation of the extrusion roller, there is severe extrusion and friction between the material and the extrusion working area, which makes the temperature in the extrusion working area high, which will affect the performance of the lipoic acid granules. Therefore, a cooling device is required to work with the extruder.

[0003] In the prior art, a planetary extruder with a water cooling system, disclosed in publication number CN209395334U, is capable of effectively cooling the pill extrusion process by arranging a cooling channel in the extrusion roller of the extruder body and cooling the extrusion roller, thereby avoiding the influence of high temperature on the medicinal properties of the product, ensuring high product quality, and having a simple and compact structure.

[0004] Although it can achieve a cooling effect inside the extruder, there are still certain defects in the actual production process. Since it uses the method of cooling the cooling water through the pipe for heat exchange, when the cooling water continues to circulate after exchanging heat with the front end, the temperature at the back will become higher and higher, and the cooling effect will become worse and worse, so it cannot have a good cooling effect on the middle and rear ends of the planetary screw extruder, which will lead to a decline in product production quality. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a cooling device for preparing lipoic acid particles using a planetary screw extruder.

[0006] To achieve the above purpose, the utility model provides a cooling device for preparing lipoic acid particles by a planetary screw extruder, comprising a frame body and an oil cooler for circulating and cooling heat transfer oil, and a planetary extrusion mechanism arranged in the frame body, the side wall of the frame body is fixedly connected with a drive box, the planetary extrusion mechanism comprises a drive extrusion roller rotating in the frame body and a planetary screw arranged in the frame body and meshing with the drive extrusion roller through a planetary gear, the planetary screw has at least four, the oil cooler is fixedly installed in the drive box, an oil storage cavity is opened inside the drive extrusion roller, a delivery pipe is rotatably connected to the side wall of the drive extrusion roller, and a drive mechanism for driving the drive extrusion roller to rotate is arranged in the drive box;

[0007] One end of the delivery pipe is fixedly connected to the oil outlet end of the oil cooler, and the other end of the delivery pipe is rotatably connected to the inner side of the oil storage cavity. A plurality of heat-conducting rods are equidistantly arranged inside the driving extrusion roller and the tail is arranged in the oil storage cavity. A plurality of oil outlet holes are equidistantly opened on the outer wall of the delivery pipe, and an oil return structure for oil return circulation cooling is provided on the driving extrusion roller.

[0008] Preferably, the oil return structure includes an oil return chamber, and three oil return chambers are provided. The three oil return chambers are all opened in the driving extrusion roller and located between the heat conducting rods. The side wall of the driving extrusion roller is fixedly connected with three connecting pipes and is connected with the oil return chamber. The side wall of the oil cooler is fixedly connected with a fixed annular pipe located outside the delivery pipe. The bottom of the fixed annular pipe is fixedly connected with an oil return pipe and is fixedly connected to the liquid inlet end of the pump body of the oil cooler.

[0009] Preferably, the side wall of the fixed annular tube is rotatably connected to the rotating annular tube and communicated with the rotating annular tube, the three connecting tube side walls are all fixedly connected to the rotating annular tube, and the oil return chambers are equidistantly distributed circumferentially in the driving extrusion roller.

[0010] Preferably, the driving mechanism includes a driving motor, which is fixedly connected to the side wall of the oil cooler, and the output end of the driving motor is fixedly connected to a driving gear. The driving extrusion roller is arranged on a side close to the oil cooler and penetrates the driving box. The driving extrusion roller is located on an outer wall on one side of the driving box and is fixedly connected to a driven gear ring meshing with the driving gear.

[0011] Preferably, a temperature sensor is provided in the oil storage chamber, and the temperature sensor is connected to the water pump wire of the oil cooler through a controller.

[0012] Preferably, a plurality of stirring blades are fixedly connected to the outer wall of the conveying pipe at equal intervals.

[0013] Compared with the prior art, the utility model has the following beneficial effects: it can ensure that the cooling effect of each area of ​​the planetary screw extruder is consistent, avoid the phenomenon that the front end heat directly increases the cooling water temperature, and improve the uniformity of the heat dissipation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall appearance structure of the planetary extruder of the utility model;

[0015] Figure 2 This is a partially cutaway three-dimensional structural schematic diagram of the planetary extruder of the utility model;

[0016] Figure 3 This is a partially cutaway three-dimensional structural schematic diagram of the driving extrusion roller of the utility model;

[0017] Figure 4The figure is a schematic diagram of the overall appearance structure of the driving mechanism of the utility model.

[0018] In the figure: 1. frame body; 2. oil cooler; 3. planetary extruder mechanism; 31. drive extrusion roller; 32. planetary screw; 4. drive box; 5. oil outlet; 6. heat conducting rod; 7. oil storage chamber; 8. delivery pipe; 9. connecting pipe; 10. fixed annular pipe; 11. rotating annular pipe; 12. oil return pipe; 13. oil return chamber; 14. drive motor; 15. drive gear; 16. driven gear ring; 17. temperature sensor; 18. stirring blade. DETAILED DESCRIPTION

[0019] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] like Figure 1-Figure 4 A cooling device for preparing lipoic acid particles by a planetary screw extruder is shown, comprising a frame body 1 and an oil cooler 2 for circulating and refrigerating heat transfer oil, the oil cooler 2 comprising a condenser, a conveying pipeline and a pump body, and a planetary extrusion mechanism 3 arranged in the frame body 1, a driving box 4 is fixedly connected to the side wall of the frame body 1, the planetary extrusion mechanism 3 comprises a driving extrusion roller 31 rotating in the frame body 1 and a planetary screw 32 arranged in the frame body 1 and meshing with the driving extrusion roller 31 through a planetary gear, the planetary screw 32 has at least four planetary screws 32, the oil cooler 2 is fixedly installed in the driving box 4, an oil storage cavity 7 is opened inside the driving extrusion roller 31, a conveying pipe 8 is rotatably connected to the side wall of the driving extrusion roller 31, and a driving mechanism for driving the driving extrusion roller 31 to rotate is arranged in the driving box 4;

[0021] One end of the delivery pipe 8 is fixedly connected to the oil outlet end of the oil cooler 2, and the other end of the delivery pipe 8 is rotatably connected to the inner side of the oil storage chamber 7. A plurality of heat conducting rods 6 are equidistantly arranged inside the driving squeeze roller 31, and the tail end is arranged in the oil storage chamber 7. A plurality of oil outlet holes 5 are equidistantly opened on the outer wall of the delivery pipe 8, and an oil return structure for oil return circulation cooling is provided on the driving squeeze roller 31;

[0022] In the production process of lipoic acid, the cooling oil is delivered to the delivery pipe 8 by starting the oil cooler 2, and then discharged into the oil storage chamber 7 through multiple oil outlet holes 5, so that the cooling oil can be evenly delivered to the bottom of each area to avoid the phenomenon that the front end heat directly increases the temperature of the cooling oil. Then, the heat generated when the driving extrusion roller 31 and the planetary screw 32 are working is absorbed by multiple heat conducting rods 6, and then exchanged with the temperature of the cooling oil in the oil storage chamber 7, so as to achieve a uniform cooling effect on the extruder, which can effectively improve the uniformity of heat dissipation of the device.

[0023] The oil return structure includes an oil return chamber 13, and three oil return chambers 13 are provided. The three oil return chambers 13 are all opened in the driving squeeze roller 31 and located between the heat conducting rods 6. The side wall of the driving squeeze roller 31 is fixedly connected with three connecting pipes 9 and is communicated with the oil return chamber 13. The side wall of the oil cooler 2 is fixedly connected with a fixed annular pipe 10 located outside the delivery pipe 8. The bottom of the fixed annular pipe 10 is fixedly connected with an oil return pipe 12 and is fixedly connected to the liquid inlet end of the pump body of the oil cooler 2. The side wall of the fixed annular pipe 10 is rotatably connected with a rotating annular pipe 11 and is communicated with it. The side walls of the three connecting pipes 9 are fixedly connected with the rotating annular pipe 11. The oil return chambers 13 are equidistantly distributed circumferentially in the driving squeeze roller 31. The oil return chambers 13 are equidistantly distributed circumferentially, so that the cooling oil can be replaced at any position where the driving squeeze roller 31 rotates;

[0024] When the cooling oil in the oil storage chamber 7 needs to be replaced, the pump body in the oil cooler 2 is started, and the cooling oil in the oil storage chamber 7 is pumped into the oil cooler 2 for cooling through the connecting pipe 9 and the oil return chamber 13. The cooled cooling oil is then transported to the oil storage chamber 7 through the delivery pipe 8 to continue cooling the material.

[0025] In order to drive the driving squeeze roller 31 to rotate, the driving mechanism includes a driving motor 14, the driving motor 14 is fixedly connected to the side wall of the oil cooler 2, the output end of the driving motor 14 is fixedly connected to the driving gear 15, the driving squeeze roller 31 is arranged on the side close to the oil cooler 2 and penetrates the driving box 4, the driving squeeze roller 31 is located on the outer wall of one side inside the driving box 4 and is fixedly connected to a driven gear ring 16 meshing with the driving gear 15. In the process of producing thioctic acid, the driving gear 15 is driven to rotate by starting the driving motor 14, and the meshing driven gear ring 16 is driven to rotate, thereby driving the driving squeeze roller 31 to rotate, and will not be hindered by the conveying pipe 8 and the connecting pipe 9.

[0026] In order to further improve the cooling effect of the device, a temperature sensor 17 is provided in the oil storage chamber 7. The temperature sensor 17 is connected to the water pump wire of the oil cooler 2 through the controller. Through the setting of the temperature sensor 17, when the cooling oil in the oil storage chamber 7 reaches a certain temperature through heat conduction, the temperature sensor 17 will send a signal to the controller, and then the controller controls the pump body of the oil cooler 2 to start, and automatically replaces the cooling oil in the oil storage chamber 7.

[0027] In order to further improve the cooling uniformity of the device, a number of stirring blades 18 are fixedly connected to the outer wall of the delivery pipe 8 at equal intervals. Since the delivery pipe 8 is fixedly installed on the oil cooler 2 and rotatably connected to the driving extrusion roller 31, the cooling oil can be stirred through the rotation of the driving extrusion roller 31 and the cooperation of the stirring blades 18, thereby further improving the uniformity of heat conduction of the cooling oil.

[0028] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A cooling device for preparing lipoic acid particles by a planetary screw extruder, comprising a frame body (1) and an oil cooler (2) for circulating and refrigerating heat-conducting oil, and a planetary extrusion mechanism (3) arranged in the frame body (1), wherein a drive box (4) is fixedly connected to a side wall of the frame body (1), and the planetary extrusion mechanism (3) comprises a driving extrusion roller (31) rotating in the frame body (1) and a planetary screw (32) arranged in the frame body (1) and meshing with the driving extrusion roller (31) through a planetary gear, wherein the planetary screw (32) has at least four Features: The oil cooler (2) is fixedly installed in the drive box (4), an oil storage chamber (7) is provided inside the drive squeeze roller (31), a delivery pipe (8) is rotatably connected to the side wall of the drive squeeze roller (31), and a drive mechanism for driving the drive squeeze roller (31) to rotate is provided in the drive box (4); One end of the delivery pipe (8) is fixedly connected to the oil outlet end of the oil cooler (2), and the other end of the delivery pipe (8) is rotatably connected to the inner side of the oil storage chamber (7). A plurality of heat conducting rods (6) are equidistantly arranged inside the driving squeeze roller (31), and the tail end is arranged in the oil storage chamber (7). A plurality of oil outlet holes (5) are equidistantly opened on the outer wall of the delivery pipe (8), and an oil return structure for oil return circulation cooling is provided on the driving squeeze roller (31).

2. A cooling device for preparing lipoic acid particles by a planetary screw extruder according to claim 1, Features: The oil return structure comprises an oil return chamber (13), three oil return chambers (13) are provided, the three oil return chambers (13) are all opened in the driving squeeze roller (31) and are located between the heat conducting rods (6), three connecting pipes (9) are fixedly connected to the side wall of the driving squeeze roller (31) and are in communication with the oil return chamber (13), a fixed annular pipe (10) is fixedly connected to the side wall of the oil cooler (2) and is located outside the delivery pipe (8), and an oil return pipe (12) is fixedly connected to the bottom of the fixed annular pipe (10) and is fixedly connected to the liquid inlet end of the pump body of the oil cooler (2).

3. A cooling device for preparing lipoic acid particles by a planetary screw extruder according to claim 2, Features: The side wall of the fixed annular tube (10) is rotatably connected to the rotating annular tube (11) and communicates with the rotating annular tube; the side walls of the three connecting tubes (9) are all fixedly connected to the rotating annular tube (11); and the oil return chambers (13) are equidistantly distributed in the driving squeeze roller (31).

4. A cooling device for preparing lipoic acid particles by a planetary screw extruder according to claim 1, Features: The driving mechanism comprises a driving motor (14), the driving motor (14) being fixedly connected to a side wall of an oil cooler (2), the output end of the driving motor (14) being fixedly connected to a driving gear (15), the driving squeezing roller (31) being arranged on a side close to the oil cooler (2) and penetrating through a driving box (4), the driving squeezing roller (31) being located on an outer wall on one side inside the driving box (4) and being fixedly connected to a driven gear ring (16) meshing with the driving gear (15).

5. A cooling device for preparing lipoic acid particles by a planetary screw extruder according to claim 1, Features: A temperature sensor (17) is provided in the oil storage chamber (7), and the temperature sensor (17) is connected to a water pump wire of the oil cooler (2) through a controller.

6. A cooling device for preparing lipoic acid particles by a planetary screw extruder according to claim 1, Features: The outer wall of the conveying pipe (8) is fixedly connected with a plurality of stirring blades (18) at equal intervals.

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