A dry heat rotary evaporator

Abstract

The utility model relates to the field of distillation equipment, and discloses a dry heat rotary evaporator, wherein a chassis is installed on a base, the middle part of the chassis is connected to a machine head, a rotating shaft is arranged between the machine head and a rotating bottle, a first heating unit and a second heating unit are arranged on the outer periphery of the rotating bottle, the inner walls of the first heating unit and the second heating unit are adapted to the outer wall of the rotating bottle, and electric heating plates are arranged on the inner walls of the first heating unit and the second heating unit. The dry heat rotary evaporator of the utility model directly heats the rotating bottle by surrounding the electric heating plate to provide the heat required for evaporation; when the rotating bottle is rotating, the electric heating plates on the inner walls of the first heating unit and the second heating unit can help the liquid in the rotating bottle to be heated more evenly during the heating process to avoid local overheating; and evaporation is achieved without a water bath.

Description

Technical Field

[0001] The utility model relates to the field of distillation equipment, in particular to a dry heat rotary evaporator. Background Art

[0002] Rotary evaporator is a kind of equipment widely used in the fields of chemistry, pharmacy, food and scientific research. It is mainly used to evaporate solvents by heating under reduced pressure to achieve separation and purification of solid or liquid substances. At present, the rotary evaporators on the market generally use water bath heating. Although this heating method has the advantages of stable heating and uniform temperature, it is not applicable when some production processes have strict control requirements on the humidity of the heating environment. Utility Model Content

[0003] In order to solve the above problems in the prior art, the utility model provides a dry heat rotary evaporator, which directly heats the rotary bottle by surrounding it with an electric heating plate to provide the heat required for evaporation, thereby realizing evaporation without a water bath.

[0004] To achieve the above purpose, the utility model provides the following solutions:

[0005] A dry heat rotary evaporator is provided. A chassis is installed on a base. The middle part of the chassis is connected to a machine head. A rotating shaft is arranged between the machine head and a rotating bottle. A first heating unit and a second heating unit are arranged on the periphery of the rotating bottle. Electric heating sheets are arranged on the inner walls of the first heating unit and the second heating unit.

[0006] In a feasible implementation, a rotating motor driving the rotating bottle is provided inside the chassis, and the rotating motor is electrically connected to an external power supply. The rotating motor drives the machine head to rotate, and the rotating bottle is linked to rotate to increase the evaporation area and ensure uniform heating.

[0007] In a feasible implementation, a vacuum pipe is provided on one side of the machine head away from the rotating shaft, and a condenser is connected to the other side of the vacuum pipe.

[0008] In a feasible implementation, a reflective heat film is provided on the outer wall surface of the first heating unit to reduce the heat loss due to diffusion.

[0009] In a feasible implementation, the first heating unit and the second heating unit are connected via a rotating shaft, and the rotating shaft rotatably mounts the first heating unit and the second heating unit via a hinge.

[0010] In a feasible implementation, the first heating unit and the second heating unit are connected to the support rod of the base via a rotating shaft.

[0011] In a feasible implementation, an adjusting bolt is passed through the first heating unit, and the adjusting bolt is arranged between the hinge and the rotating shaft, and one end of the adjusting bolt touches the rotating shaft. By rotating the adjusting bolt, the first heating unit is flipped upward with the rotating shaft as the center, so as to rotate the bottle for disassembly and assembly.

[0012] In a feasible implementation, an electric lifting rod is also provided on the base, the bottom end of the electric lifting rod is fixed on the base, the top end of the electric lifting rod is fixedly connected to the bottom end of the second heating unit, and the electric lifting rod is located between the chassis and the support rod.

[0013] In a feasible implementation, an electric control cabinet is also fixedly installed on the base, and the side wall of the electric control cabinet is connected to the support rod; a PLC controller is provided on the side of the support rod away from the electric control cabinet, the input end of the PLC controller is electrically connected to the power distribution unit in the electric control cabinet, the power distribution unit in the electric control cabinet is electrically connected to the external power supply, the input end of the electric heating plate is connected to the output end of the PLC controller, and the input end of the electric lifting rod is connected to the output end of the PLC controller.

[0014] In a feasible implementation, the first heating unit and the second heating unit are in the shape of a hemispherical shell.

[0015] In a feasible implementation, the inner walls of the first heating unit and the second heating unit are adapted to the outer wall of the rotating bottle.

[0016] In a feasible implementation, the outer wall material of the first heating unit and the second heating unit is polytetrafluoroethylene, stainless steel or asbestos.

[0017] By using materials with good heat resistance, the heating unit can ensure uniform heat transfer.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The utility model provides a dry heat rotary evaporator, wherein a first heating unit and a second heating unit are arranged on the outer periphery of a rotary bottle of the rotary evaporator. Since the inner walls of the first heating unit and the second heating unit are adapted to the outer wall of the rotary bottle and electric heating plates are arranged on the inner walls of the first heating unit and the second heating unit, the rotary bottle is directly heated by the electric heating plates in a surrounding form to provide the heat required for evaporation. When the rotary bottle is rotating, the electric heating plates on the inner walls of the first heating unit and the second heating unit can help the liquid in the rotary bottle to be heated more evenly during the heating process to avoid local overheating. The speed of the rotary bottle is adjusted by adjusting the speed of the rotary motor to meet the experimental requirements under different conditions. When the height of the rotary bottle changes, the position of the rotary bottle in the heating source can also be adjusted by flipping the first heating unit and lifting the second heating unit. The outer wall material of the first heating unit and the second heating unit is polytetrafluoroethylene, stainless steel or asbestos. By adopting a material with good heat resistance, it is ensured that the heating unit transfers heat evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the dry heat rotary evaporator of the utility model;

[0021] In the figure, 1-base, 2-chassis, 3-machine head, 4-rotating shaft, 5-rotating bottle, 6-vacuum pipe, 7-first heating unit, 8-second heating unit, 9-electric heating plate, 10-rotating shaft, 11-loose-leaf, 12-support rod, 13-adjusting bolt, 14-electric lifting rod, 15-electric control cabinet, 16-PLC controller. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] Example 1

[0024] See also Figure 1The utility model provides a dry heat rotary evaporator, a chassis 2 is installed on the base 1, the middle part of the chassis 2 is connected to the head 3, a rotating shaft 4 is provided between the head 3 and the rotating bottle 5, a rotating motor is provided inside the chassis 2 to drive the rotating bottle 5 to rotate (this part is the prior art, so it is not shown in the figure), the rotating motor is electrically connected to an external power supply, the rotating motor drives the head 3 to rotate, and the rotating bottle 5 is linked to rotate, so as to increase the evaporation area and heat evenly. A vacuum pipe 6 is provided on the side of the head 3 away from the rotating shaft 4, and a condenser is connected to the other side of the vacuum pipe 6. A collecting bottle is connected to the bottom of the condenser (this part is the prior art, so it is not shown in the figure), the condenser is connected to the rotating bottle, and the steam evaporated from the rotating bottle enters the condenser through the vacuum pipe to recover the solvent or collect the evaporated product while condensing. The working principle of the evaporator is the prior art, and it will not be described in detail here. The outer periphery of the rotating bottle 5 is provided with a first heating unit 7 and a second heating unit 8. The first heating unit 7 and the second heating unit 8 are in the shape of a hemispherical shell, and the inner wall thereof is adapted to the outer wall of the rotating bottle 5. An electric heating sheet 9 is provided on the inner wall of the first heating unit 7 and the second heating unit 8. A reflective heat film is also provided on the outer wall surface of the first heating unit to reduce the heat loss of diffusion. The first heating unit 7 and the second heating unit 8 are connected by a rotating shaft 10. The rotating shaft 10 is rotatably installed by a hinge 11. The first heating unit 7 and the second heating unit 8 are connected to a support rod 12 of the base 1 by the rotating shaft 10. An adjusting bolt 13 is passed through the first heating unit 7. The adjusting bolt 13 is arranged between the hinge 11 and the rotating shaft 10, and one end of the adjusting bolt 13 contacts the rotating shaft 10. By loosening and tightening the adjusting bolt 13, the first heating unit 7 is turned upward with the rotating shaft 10 as the center axis, so as to facilitate the disassembly and assembly of the rotating bottle.

[0025] The base 1 is also provided with an electric lifting rod 14, the bottom end of which is fixed on the base 1, the top end of which is fixedly connected to the bottom end of the second heating unit 8, and the electric lifting rod 14 is located between the chassis 2 and the support rod 12. An electric control cabinet 15 is also fixedly installed on the base 1, the side wall of which is connected to the support rod 12, and a PLC controller 16 is provided on the side of the support rod 12 away from the electric control cabinet 15, the input end of the PLC controller 16 is electrically connected to the power distribution unit in the electric control cabinet 15, and the power distribution unit in the electric control cabinet 15 is electrically connected to an external power source, that is, the external power source provides the required power to the PLC controller 16 through the power distribution unit in the electric control cabinet 15, the input end of the electric heating plate 9 is connected to the output end of the PLC controller 16, and the input end of the electric lifting rod 14 is connected to the output end of the PLC controller 16. The electric lifting rod 14 is controlled to rise and fall by the PLC controller 16, thereby driving the second heating unit 8 to rise and fall.

[0026] Since the inner wall of the first heating unit 7 and the second heating unit 8 is adapted to the outer wall of the rotating bottle 5 and the inner wall of the first heating unit 7 and the second heating unit 8 is provided with an electric heating plate 9, the rotating bottle 5 is directly heated by the electric heating plate 9 in a surrounding form to provide the heat required for evaporation. When the rotating bottle 5 is rotating, the electric heating plate 9 on the inner wall of the first heating unit 7 and the second heating unit 8 can help the liquid in the rotating bottle 5 to be heated more evenly during the heating process to avoid local overheating. The rotating speed of the rotating bottle 5 is adjusted by adjusting the rotating speed of the rotating motor to adapt to the experimental requirements under different conditions. When the height of the rotating bottle 5 changes, the position of the rotating bottle 5 in the heating source can also be adjusted by turning the first heating unit 7 and lifting the second heating unit 8. The outer wall material of the first heating unit 7 and the second heating unit 8 is polytetrafluoroethylene, stainless steel or asbestos. By adopting a material with good heat resistance, it is ensured that the heating unit is uniformly heat-transmitted.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dry heat rotary evaporator, characterized in that, A chassis is installed on the base, the middle part of the chassis is connected to the machine head, a rotating shaft is arranged between the machine head and the rotating bottle, a first heating unit and a second heating unit are arranged on the periphery of the rotating bottle, and electric heating plates are arranged on the inner walls of the first heating unit and the second heating unit.

2. The dry heat rotary evaporator according to claim 1, characterized in that A rotating motor for driving the rotating bottle to rotate is arranged inside the chassis, and the rotating motor is electrically connected to an external power source. The rotating motor drives the machine head to rotate, thereby linking the rotating bottle to rotate.

3. The dry heat rotary evaporator according to claim 1, characterized in that A vacuum pipe is arranged on one side of the machine head away from the rotating shaft.

4. The dry heat rotary evaporator according to claim 1, characterized in that The first heating unit and the second heating unit are connected via a rotating shaft, and the rotating shaft is used to rotatably install the first heating unit and the second heating unit through a hinge.

5. The dry heat rotary evaporator according to claim 1, characterized in that: The first heating unit and the second heating unit are connected to the support rod of the base through a rotating shaft.

6. The dry heat rotary evaporator according to claim 1, characterized in that: The first heating unit is provided with an adjusting bolt, which is arranged between the hinge and the rotating shaft, and one end of the adjusting bolt contacts the rotating shaft. The first heating unit is turned upward with the rotating shaft as the center axis by rotating the adjusting bolt.

7. The dry heat rotary evaporator according to claim 1, characterized in that: The base is also provided with an electric lifting rod, the bottom end of which is fixed on the base, the top end of which is fixedly connected to the bottom end of the second heating unit, and the electric lifting rod is located between the chassis and the support rod.

8. The dry heat rotary evaporator according to claim 7, characterized in that: An electric control cabinet is also fixedly installed on the base, and the side wall of the electric control cabinet is connected to the support rod; a PLC controller is provided on the side of the support rod away from the electric control cabinet, the input end of the PLC controller is electrically connected to the electric control cabinet, the input end of the electric heating plate is connected to the output end of the PLC controller, and the input end of the electric lifting rod is connected to the output end of the PLC controller.

9. The dry heat rotary evaporator according to claim 1, characterized in that: The first heating unit and the second heating unit are in the shape of a hemispherical shell; the inner walls of the first heating unit and the second heating unit are adapted to the outer wall of the rotating bottle.

10. The dry heat rotary evaporator according to claim 1, characterized in that: The outer wall material of the first heating unit and the second heating unit is polytetrafluoroethylene, stainless steel or asbestos.

Images