Rotary evaporation device for supernate obtained after centrifugation of radix angelicae dahuricae extracting solution

Abstract

The invention relates to the technical field of evaporation devices, and provides a rotary evaporation device for supernate obtained after radix angelicae dahuricae extracting solution centrifugation, the rotary evaporation device comprises a machine base, a water bath kettle, a rotary evaporation main machine, an evaporation bottle and a collection bottle, the evaporation bottle is rotatably arranged on the rotary evaporation main machine, the rotary evaporation device further comprises a condenser, an auxiliary cooling assembly and a collection liquid cooling assembly, the condenser comprises a condensation chamber and a condensation pipe, the condensation pipe is rotatably arranged in the condensation chamber, the auxiliary cooling assembly is used for conducting auxiliary cooling on the condenser and comprises a driving shaft and a rotating shaft, the driving shaft is rotatably arranged outside the condensation chamber and is in transmission connection with the condensation pipe, and the rotating shaft is in transmission connection with the driving shaft. A plurality of fan blades are fixedly connected to the exterior of the rotating shaft, and the collecting liquid cooling assembly is used for cooling the collecting bottle. By means of the technical scheme, the problems that in the prior art, the condensation efficiency is low, and the collected concentrated solution needs to be additionally cooled are solved.

Description

Technical Field

[0001] The invention relates to the technical field of evaporation devices, and in particular to a rotary evaporation device for supernatant liquid after centrifugation of angelica dahurica extract. Background Art

[0002] Angelica dahurica extract is a powder made from the Angelica dahurica medicinal material after extraction, concentration, and addition of a certain amount of auxiliary materials. It has a wide range of uses. One extraction method is to crush the Angelica dahurica medicinal material to a suitable particle size for screening, dry the powder to a constant weight, weigh an appropriate amount of the medicinal material powder according to a suitable material-liquid ratio for ultrasonic extraction, centrifuge the extract to obtain the supernatant, rotary evaporate and concentrate, add anhydrous ethanol after the concentrate is cooled, and then stand to obtain the Angelica dahurica extract.

[0003] Among them, a rotary evaporator is required in the rotary evaporation step. The rotary evaporator can be used to recover and evaporate organic solvents. It uses a motor to drive the distillation flask to rotate, and uses a water bath heating method to heat the distillation flask. Since the distiller is constantly rotating, it is unnecessary to add zeolite and there will be no violent boiling. At the same time, due to the continuous rotation, the liquid adheres to the wall of the distiller to form a layer of liquid film, which increases the evaporation area and accelerates the evaporation rate. The steam enters the interior of the condenser and condenses into liquid, and falls into the interior of the collecting bottle for concentration and collection. During use, cold water is used to enter the interior of the condenser tube to condense the steam. The condenser enters the steam for a long time, and its surface temperature gradually increases, which will reduce the condensation efficiency to a certain extent, and the concentrated liquid collected in the collecting bottle will also have a certain temperature, and it needs to be subsequently naturally cooled. As the steam continues to enter the condenser and the concentrated liquid with a certain temperature after condensation enters the collecting bottle, the condensation and collection and cooling time are all increasing. Therefore, we propose a rotary evaporation device for the supernatant after centrifugation of the angelica extract, which can improve the condensation efficiency of the high-temperature steam, and cool the collected liquid at the same time, reduce the subsequent cooling time, and improve the extraction efficiency of angelica. Summary of the invention

[0004] The invention provides a rotary evaporator for supernatant after centrifugation of angelica dahurica extract, which solves the problems of low condensation efficiency and need for additional cooling of concentrated liquid after collection in the prior art.

[0005] The technical solution of the present invention is as follows:

[0006] A rotary evaporator for supernatant of angelica dahurica extract after centrifugation, comprising a machine base, a water bath, a rotary evaporator main machine, an evaporation bottle and a collection bottle, wherein the evaporation bottle is rotatably arranged on the rotary evaporator main machine, and further comprising:

[0007] A condenser, the condenser is connected to the evaporation flask, and the condenser comprises:

[0008] A condensation chamber, wherein the evaporation flask is connected to the condensation chamber through an evaporation tube, the evaporation flask is connected to a feeding tube, the feeding tube passes through the condensation chamber and the evaporation tube, and the collecting flask is connected to the bottom end of the condensation chamber;

[0009] A condenser, the condenser being rotatably disposed inside the condenser chamber, the bottom of the condenser being connected to a water inlet pipe, and the top of the condenser being connected to a water outlet pipe;

[0010] An auxiliary cooling component, the auxiliary cooling component is used to assist in cooling the condenser, and the auxiliary cooling component includes:

[0011] A driving shaft, the driving shaft is rotatably arranged outside the condensing chamber, and the driving shaft is drivingly connected to the condensing tube;

[0012] A rotating shaft, wherein a plurality of rotating shafts are provided, the rotating shafts are rotatably connected to the outside of the condensing chamber, the rotating shafts are drivingly connected to the driving shaft, and a plurality of fan blades are fixedly connected to the outside of the rotating shaft;

[0013] A collection liquid cooling component, which is used to cool the collection bottle, and includes:

[0014] A cold water bin is liftably arranged on the machine base. When the cold water bin rises, the collecting bottle is located inside the cold water bin to cool the collecting bottle.

[0015] In order to realize the transmission connection between the drive shaft and the condenser, a drive assembly is also included, and the drive assembly is used to drive the condenser and the drive shaft to rotate. The drive assembly includes:

[0016] A driving shaft, the driving shaft is rotatably arranged on the condensing chamber, the driving shaft is fixedly connected with a driving gear, the condensing tube is fixedly sleeved with a driven gear, and the driven gear is meshed with the driving gear;

[0017] A passive gear, the ends of the driving shaft and the active shaft are fixedly connected with the passive gear, a transmission box is fixedly connected to the condensing chamber, and the passive gear is located inside the transmission box;

[0018] A transmission gear is rotatably connected to the interior of the transmission box, and a plurality of transmission gears are arranged between two adjacent driven gears for transmission between the driven gears.

[0019] In order to realize the transmission connection between the rotating shaft and the driving shaft, the driving shaft is fixedly sleeved with a plurality of driving bevel gears on the outside, and the end of the rotating shaft is fixedly connected with a driven bevel gear, and the driven bevel gears correspond to the driving bevel gears one by one, and the driven bevel gears are meshed with the driving bevel gears.

[0020] In order to reduce the influence of the hot air from the water bath on the condenser, the air outlet direction of the fan blade is toward the water bath.

[0021] In order to further improve the condensation efficiency, a cooling cover is fixedly mounted on the outside of the condensation chamber, the bottom of the cooling cover is connected to a water inlet pipe, and the top of the cooling cover is connected to a water outlet pipe.

[0022] In order to improve the cooling effect on the collection bottle, a conversion seat is provided on the machine base which can be raised and lowered and rotatable, and a plurality of cold water bins are provided, and the cold water bins are fixedly connected to the conversion seat.

[0023] In order to further improve the cooling effect on the collection bottle, a plurality of heat sinks are fixedly connected to the outside of the cold water tank.

[0024] The working principle and beneficial effects of the present invention are:

[0025] 1. In the present invention, the evaporating flask is heated by a water bath, and the Angelica dahurica raw material is added into the evaporating flask through a feeding tube. The rotary evaporator drives the evaporating flask to rotate so that the internal raw materials are evenly heated. The vapor generated by evaporation enters the interior of the condensing chamber through the evaporating tube, and the condensing tube encounters a low temperature and condenses to generate droplets, which drip into the interior of the collecting bottle for collection.

[0026] 2. In the present invention, cold water is introduced into the interior of the condenser to condense the steam in the condensation chamber. At the same time, the condenser is driven to rotate by the active shaft to expand the contact area between the steam and the condenser. The rotation of the condenser generates airflow to improve the flow of steam and further expand the contact between the steam and the condenser. At the same time, the rotation of the condenser can throw off the liquid condensed on the surface of the condenser to improve the collection efficiency. The side wall of the condensation chamber is cooled by the cold water in the cooling cover to ensure the low temperature environment in the condenser. At the same time, the steam can also be condensed when it contacts the inner wall of the condensation chamber, thereby improving the efficiency of liquid collection.

[0027] 3. In the present invention, the collecting bottle is cooled by the cold water in the cold water bin, so that the condensed liquid is cooled quickly, the subsequent cooling time is reduced, and the influence of the temperature in the collecting bottle on the temperature in the condenser is reduced. By alternating the use of multiple cold water bins and the heat dissipation effect of the heat sink, the low temperature environment of the cold water bin is ensured, and the collecting bottle is cooled better.

[0028] 4. Therefore, compared with the rotary evaporation device in the prior art, the present invention drives the flow of steam in the condensation chamber through the rotation of the condenser tube, increases the contact between the steam and the condenser tube, and at the same time, throws off the condensed liquid droplets to improve the condensation efficiency. The side wall of the condensation chamber is cooled by the cooling hood, so that the steam and the inner wall of the condensation chamber are in contact and condensed, thereby maintaining the low temperature environment in the condensation chamber and improving the condensation efficiency. At the same time, multiple cold water bins are used to alternately cool the collection bottle to reduce the cooling time of the collected liquid. When the condenser tube rotates, it drives the drive shaft, the rotating shaft and the fan blades to rotate, blows air to the cooling hood to assist in cooling the condensation chamber, and blows air to the water bath to reduce the influence of hot air on condensation and improve the extraction efficiency of Angelica dahurica extract. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Figure 1 It is a structural schematic diagram of the first viewing angle of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the second viewing angle of the present invention;

[0032] Figure 3 It is a schematic diagram of the structure of the evaporating flask, the collecting flask, the condenser and the auxiliary cooling component of the present invention;

[0033] Figure 4 It is a schematic diagram of the structure of the condenser, the auxiliary cooling component and the driving component of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of the collection liquid cooling component of the present invention;

[0035] Figure 6 For the present invention Figure 1 Schematic diagram of the local enlarged structure at point A in the middle.

[0036] In the figure:

[0037] 1. Machine base; 2. Water bath; 3. Rotary evaporator; 4. Evaporation bottle; 5. Collection bottle; 6. Cooling cover; 7. Support frame;

[0038] 101, condensation chamber; 102, condensation tube; 103, feeding tube; 104, water inlet pipe; 105, water outlet pipe; 106, water outlet seat; 107, water inlet seat; 108, evaporation tube;

[0039] 201, driving shaft; 202, rotating shaft; 203, fan blade;

[0040] 301, driving shaft; 302, driven gear; 303, transmission gear; 304, driving gear; 305, driven gear; 306, transmission box; 307, driving bevel gear; 308, driven bevel gear; 309, motor 1;

[0041] 401. Cold water tank; 402. Conversion seat; 403. Heat sink; 404. Electric cylinder; 405. Motor 2. DETAILED DESCRIPTION

[0042] The following will be combined with 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.

[0043] like Figures 1 to 6 As shown, this embodiment proposes a rotary evaporation device for the supernatant after centrifugation of Angelica dahurica extract, including a machine base 1, a water bath 2, a rotary evaporation main machine 3, an evaporating bottle 4 and a collecting bottle 5. The evaporating bottle 4 can be rotatably arranged on the rotary evaporation main machine 3, and also includes a condenser, an auxiliary cooling component and a collecting liquid cooling component. The rotary evaporation main machine 3 can be lifted and lowered on the machine base 1 through an electric cylinder 404. A rotary motor is installed inside the rotary evaporation main machine 3 to drive the evaporating bottle 4 to rotate, and the angle of the evaporating bottle 4 can be adjusted at the same time, so that the bottom of the evaporating bottle 4 is inside the water bath 2, and the evaporating bottle 4 is heated by the water bath 2. These are all existing technologies of rotary evaporators known to those skilled in the art, and are not the innovations of this embodiment. Compared with the rotary evaporation devices in the prior art, this embodiment The invention drives the flow of steam in the condensation chamber 101 through the rotation of the condensation tube 102, increases the contact between the steam and the condensation tube 102, and at the same time, throws off the condensed liquid droplets to improve the condensation efficiency. The side wall of the condensation chamber 101 is cooled by the cooling hood 6, so that the steam and the inner wall of the condensation chamber 101 are in contact and condensed, and the low temperature environment in the condensation chamber 101 is maintained to improve the condensation efficiency. At the same time, multiple cold water bins 401 are used to alternately cool the collection bottle 5 to reduce the cooling time of the collected liquid. When the condensation tube 102 rotates, it drives the drive shaft 201, the rotating shaft 202 and the fan blades 203 to rotate, blows air to the cooling hood 6, and assists in cooling the condensation chamber 101. At the same time, blows air to the water bath 2 to reduce the influence of hot air on condensation and improve the extraction efficiency of the Angelica dahurica extract.

[0044] The condenser is connected to the evaporation bottle 4, and the condenser includes a condensation chamber 101 and a condensation tube 102. The evaporation bottle 4 is connected to the condensation chamber 101 through the evaporation tube 108. The evaporation bottle 4 is connected to a feeding tube 103, and the feeding tube 103 passes through the condensation chamber 101 and the evaporation tube 108. The collecting bottle 5 is connected to the bottom end of the condensation chamber 101, and the condensation tube 102 is rotatably arranged inside the condensation chamber 101. The bottom of the condensation tube 102 is connected to a water inlet pipe 104, and the top of the condensation tube 102 is connected to a water outlet pipe 105. The top of the condensation tube 102 is fixedly connected to a water outlet seat 106, and the water outlet seat 106 is rotatably connected to the water outlet pipe 105. The bottom of the condensation tube 102 is fixedly connected to the water outlet seat 106. The water outlet seat 106 is connected to the water outlet pipe 105. A water inlet seat 107 is connected, and the water inlet seat 107 and the water inlet pipe 104 are rotatably connected, and the water inlet pipe 104 and the water outlet pipe 105 are connected to an external refrigeration device or tap water, and cold water is transported to the inside of the condenser 102. The liquid in the evaporation bottle 4 is heated and evaporates into steam, which enters the inside of the condensation chamber 101 through the evaporation tube 108. The steam contacts the condenser 102 and condenses into water droplets when it is cold, and drips into the inside of the collecting bottle 5 for collection. The rotation of the condenser 102 forms an airflow, which expands the contact between the steam in the condensation chamber 101 and the condenser 102, and at the same time, the droplets on the surface of the condenser 102 are thrown off, so that the subsequent steam can contact the condenser 102 faster.

[0045] The auxiliary cooling component is used to assist in cooling the condenser. The auxiliary cooling component includes a drive shaft 201 and a rotating shaft 202. The drive shaft 201 is rotatably arranged outside the condensing chamber 101. The drive shaft 201 is transmission-connected to the condensing tube 102. The rotating shaft 202 is provided with a plurality of fan blades 203. In order to realize the transmission connection between the drive shaft 201 and the condensing tube 102, a drive component is also included. The drive component is used to drive the condensing tube 102 and the drive shaft 201 to rotate. The drive component includes an active shaft 30 1. A passive gear 302 and a transmission gear 303. The driving shaft 301 is rotatably arranged on the condensing chamber 101. The driving shaft 301 is fixedly connected with a driving gear 304. The condensing tube 102 is fixedly sleeved with a driven gear 305. The driven gear 305 is meshed with the driving gear 304. The ends of the driving shaft 201 and the driving shaft 301 are both fixedly connected with the passive gear 302. A transmission box 306 is fixedly connected to the condensing chamber 101. The passive gear 302 is located inside the transmission box 306. The transmission gear 303 is rotatably connected to the inside of the transmission box 306. A plurality of transmission gears 303 are arranged between two adjacent passive gears 302 for passive gears 302. The transmission between the gears 302 is to realize the transmission connection between the rotating shaft 202 and the driving shaft 201. The external fixed sleeve of the driving shaft 201 is equipped with a plurality of driving bevel gears 307. The end of the rotating shaft 202 is fixedly connected with a driven bevel gear 308. The driven bevel gear 308 corresponds to the driving bevel gear 307 one by one. The driven bevel gear 308 and the driving bevel gear 307 are meshed. A motor 309 is installed on the transmission box 306. The output end of the motor 309 is fixedly connected to one of the transmission gears 303. The transmission gear 303 can be driven to rotate by the motor 309, and the multiple driven gears 302 are driven to rotate, driving the active shaft 301 and the driving shaft 201 rotates, the active shaft 301 drives the driving gear 304, the driven gear 305 and the condenser 102 to rotate, the driving shaft 201 drives the driving bevel gear 307 to rotate, thereby driving multiple driven bevel gears 308, the rotating shaft 202 and the fan blades 203 to rotate, the fan blades 203 rotate to form cold wind, in order to reduce the influence of the hot air of the water bath pot 2 on the condenser, the wind direction of the fan blades 203 is toward the water bath pot 2, and multiple fan blades 203 form cold wind flowing from the condensation chamber 101 to the water bath pot 2. While the condensation chamber 101 is cooled by air, the hot air generated by the water bath pot 2 is blown away from the condenser, thereby reducing the influence of the hot air on the condensation of steam.

[0046] The collection liquid cooling component is used to cool the collection bottle 5. The collection liquid cooling component includes a cold water tank 401, which can be raised and lowered on the machine base 1. When the cold water tank 401 rises, the collection bottle 5 is located inside the cold water tank 401, which is used to cool the collection bottle 5. In order to improve the cooling effect on the collection bottle 5, a conversion seat 402 can be raised and lowered and rotatably arranged on the machine base 1. The cold water tank 401 is provided with multiple cold water tanks, which are fixedly connected to the conversion seat 402. The outside of the cold water tank 401 is fixedly connected with multiple heat sinks 403. An electric cylinder 404 is installed on the machine base 1. A motor 2 405 is installed at the output end of the electric cylinder 404. The conversion seat 402 is fixedly connected to the output end of the motor 2 405. Through the electric cylinder 40 4 can drive the cold water bin 401 to rise and fall, and the conversion seat 402 and the cold water bin 401 can be driven to rotate by the motor 2 405, and the corresponding cold water bin 401 is rotated to the bottom of the collecting bottle 5, and the electric cylinder 404 drives the cold water bin 401 to rise to the outside of the collecting bottle 5, and the cold water in the cold water bin 401 is used to cool the collecting bottle 5, so that the collected liquid in the collecting bottle 5 is quickly cooled, reducing the subsequent cooling of the collected liquid, and at the same time avoiding the influence of the gradually increasing temperature in the collecting bottle 5 on the temperature of the condenser, and multiple cold water bins 401 are used to cool the collecting bottle 5 alternately, and the cold water bin 401 that is not in contact with the collecting bottle 5 dissipates heat through the heat sink 403, ensuring that the cold water in the cold water bin 401 is in a low temperature state, thereby ensuring the cooling effect on the collecting bottle 5.

[0047] To further improve the condensation efficiency, a cooling hood 6 is fixedly mounted on the outside of the condensation chamber 101. A water inlet pipe 104 is connected to the bottom of the cooling hood 6, and a water outlet pipe 105 is connected to the top of the cooling hood 6. The water inlet pipe 104 connected to the cooling hood 6 and the water inlet pipe 104 connected to the condensation pipe 102 are connected to each other, and the water outlet pipe 105 connected to the cooling hood 6 and the water outlet pipe 105 connected to the condensation pipe 102 are connected to each other. The water inlet pipe 104 and the water outlet pipe 105 are also connected to an external refrigeration device or tap water, and cold water is transported to the inside of the cooling hood 6 to cool the side wall of the condensation chamber 101. After the steam enters the condensation chamber 101, it can also condense by contacting the inner wall of the condensation chamber 101, thereby further improving the condensation efficiency. At the same time, the low temperature environment in the condensation chamber 101 is ensured to reduce the temperature increase caused by the continuous entry of steam into the condensation chamber 101. The outside of the cooling hood 6 is fixedly connected to a support frame 7, and the rotating shaft 202 is rotatably connected to the support frame 7.

[0048] The working principle or use process of the rotary evaporation device for the supernatant of the angelica extract after centrifugation is as follows:

[0049] The present application is to centrifuge the extract after ultrasonic extraction of Angelica dahurica powder, take the supernatant for rotary evaporation and concentration, add the supernatant into the interior of the evaporation bottle 4 through the feed pipe, adjust the heating temperature of the water bath 2, adjust the height and angle of the evaporation bottle 4 so that the evaporation bottle 4 is located inside the water bath 2, and the rotary evaporation host 3 drives the evaporation bottle 4 to rotate;

[0050] The water bath pot 2 heats the evaporation bottle 4 in a water bath, and the liquid in the evaporation bottle 4 is heated and evaporated. The steam enters the interior of the condensation chamber 101 through the evaporation tube 108, and the external cold water enters the interior of the condensation tube 102 and the cooling cover 6. At the same time, the motor 309 drives the driving shaft 301 and the condensation tube 102 to rotate. The steam condenses when it is cold to produce liquid droplets, which drip into the interior of the collection bottle 5 for collection.

[0051] The motor 1 309 drives the driving shaft 201 to rotate, and drives the rotating shaft 202 and the fan blades 203 to rotate under the transmission action of the driving bevel gear 307 and the driven bevel gear 308, so as to blow cold air to the condensation chamber 101, and at the same time blow the hot air generated by the heating of the water bath pot 2 away from the condensation chamber 101;

[0052] The cold water in the cold water bin 401 is wrapped around the outside of the collecting bottle 5 to cool the collecting bottle 5. After a period of time, the electric cylinder 404 drives the cold water bin 401 to descend, and the second motor 405 drives the conversion seat 402 to rotate, so that the other cold water bin 401 rotates to the bottom of the collecting bottle 5, and then the electric cylinder 404 drives the cold water bin 401 to rise to cool the collecting bottle 5. After evaporation is completed, the collecting bottle 5 is removed and the concentrated liquid can be processed subsequently.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary evaporator for the supernatant of the centrifuged Angelica dahurica extract, comprising a base (1), a water bath (2), a rotary evaporator main unit (3), an evaporating flask (4) and a collecting flask (5), wherein the evaporating flask (4) is rotatably arranged on the rotary evaporator main unit (3), and characterized in that: It also includes a condenser, an auxiliary cooling component and a collection liquid cooling component; The condenser is connected to the evaporation flask (4), and the condenser comprises: A condensation chamber (101), the evaporation flask (4) is connected to the condensation chamber (101) via an evaporation tube (108), the evaporation flask (4) is connected to a feeding tube (103), the feeding tube (103) passes through the condensation chamber (101) and the evaporation tube (108), and the collecting flask (5) is connected to the bottom end of the condensation chamber (101); A condenser (102), the condenser (102) being rotatably arranged inside the condenser chamber (101), the bottom of the condenser (102) being connected to a water inlet pipe (104), and the top of the condenser (102) being connected to a water outlet pipe (105); The auxiliary cooling component is used to assist in cooling the condenser, and the auxiliary cooling component includes: A driving shaft (201), the driving shaft (201) being rotatably disposed outside the condensation chamber (101), the driving shaft (201) being drivingly connected to the condensation tube (102); A rotating shaft (202), wherein a plurality of rotating shafts (202) are provided, wherein the rotating shaft (202) is rotatably connected to the outside of the condensation chamber (101), wherein the rotating shaft (202) is transmission-connected to the driving shaft (201), and a plurality of fan blades (203) are fixedly connected to the outside of the rotating shaft (202); The collection liquid cooling component is used to cool the collection bottle (5).

2. The rotary evaporation device for the supernatant of the Angelica dahurica extract after centrifugation according to claim 1, characterized in that: The collected liquid cooling component comprises: A cold water bin (401) is arranged on the machine base (1) in a liftable manner. When the cold water bin (401) rises, the collecting bottle (5) is located inside the cold water bin (401) to cool the collecting bottle (5).

3. The rotary evaporation device for the supernatant of the Angelica dahurica extract after centrifugation according to claim 2, characterized in that: The exterior of the condensation chamber (101) is fixedly sleeved with a cooling cover (6), the bottom of the cooling cover (6) is connected to a water inlet pipe (104), and the top of the cooling cover (6) is connected to a water outlet pipe (105).

4. The rotary evaporation device for the supernatant of the Angelica dahurica extract after centrifugation according to claim 3, characterized in that: A conversion seat (402) is provided on the machine base (1) in a manner that it can be raised and lowered and can be rotated. A plurality of cold water bins (401) are provided, and the cold water bins (401) are fixedly connected to the conversion seat (402).

5. The rotary evaporation device for the supernatant of the Angelica dahurica extract after centrifugation according to claim 4, characterized in that: It also includes a driving assembly, which is used to drive the condenser tube (102) and the driving shaft (201) to rotate, and the driving assembly includes: A driving shaft (301), the driving shaft (301) being rotatably disposed on the condensation chamber (101), the driving shaft (301) being fixedly connected to a driving gear (304), the condensation tube (102) being fixedly sleeved with a driven gear (305), the driven gear (305) being meshed with the driving gear (304); A passive gear (302), the ends of the driving shaft (201) and the active shaft (301) are both fixedly connected with the passive gear (302), the condensation chamber (101) is fixedly connected with a transmission box (306), and the passive gear (302) is located inside the transmission box (306); A transmission gear (303) is rotatably connected to the inside of the transmission box (306), and a plurality of transmission gears (303) are arranged between two adjacent passive gears (302) for transmission between the passive gears (302).

6. The rotary evaporation device for the supernatant of the angelica extract after centrifugation according to claim 5, characterized in that: The outer part of the driving shaft (201) is fixedly sleeved with a plurality of driving bevel gears (307); the end of the rotating shaft (202) is fixedly connected with a driven bevel gear (308); the driven bevel gears (308) correspond to the driving bevel gears (307) one by one, and the driven bevel gears (308) and the driving bevel gears (307) are meshed.

7. The rotary evaporation device for the supernatant of the Angelica dahurica extract after centrifugation according to claim 6, characterized in that: The air outlet direction of the fan blade (203) is toward the water bath (2).

8. The rotary evaporation device for the supernatant of the Angelica dahurica extract after centrifugation according to claim 7, characterized in that: A plurality of heat sinks (403) are fixedly connected to the outside of the cold water tank (401).

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