Anti-flushing rotary evaporator

Abstract

The utility model relates to an anti-flushing rotary evaporator which comprises a support and a water bath heating kettle, and the water bath heating kettle is arranged on one side of the support; the rotary bottle is arranged in the water bath heating kettle; the condenser is arranged on the other side of the support; the collecting bottle is connected to the lower end of the condenser; the connecting pipe is communicated with the rotary bottle and the condenser; an electromagnetic vacuum valve is arranged at the tail end, away from the rotary bottle, of the connecting pipe; the rotating motor is connected to the support, and the rotating motor is connected with the rotating bottle through a rotating sleeve; and one end of the vacuum degree controller is connected with the vacuum pump, and the other end of the vacuum degree controller is connected with the electromagnetic vacuum valve. The corresponding vacuum critical value is set and compared with the set vacuum critical value, then the electromagnetic vacuum valve is controlled to be automatically opened or closed, it is guaranteed that liquid in the rotary bottle does not rush, manpower is effectively saved, and efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary evaporators, in particular to an anti-overflow rotary evaporator. Background Art

[0002] Rotary evaporators are widely used in the fields of chemistry, chemical engineering, biopharmaceuticals, etc., mainly for product concentration, crystallization, powder drying, solvent recovery, etc. During the rotary evaporation process, under high temperature and negative pressure conditions, the liquid in the rotary flask will evaporate rapidly and condense quickly into a liquid when reaching the condenser and be collected in the receiving flask.

[0003] The purpose of rotation is to increase the evaporation area, form a thin film of the solvent, and accelerate evaporation. When the existing rotary evaporator starts to work, the pressure rises slowly, the liquid in the rotary flask warms up slowly, and the instrument has not reached the equilibrium state, requiring the operator to be present until the instrument is in equilibrium. In case the liquid solvent in the rotary flask contains a high concentration of ethanol or a large amount of saponins, etc., the liquid in the rotary flask will boil violently, and the operator needs to quickly open the valve to break the vacuum in time to make the liquid return to the rotary flask. The reaction time is within about 2 seconds. Otherwise, the liquid will rush out of the rotary flask directly into the receiving flask.

[0004] Once the liquid in the rotary flask directly flushes into the receiving flask, all the previous rotary recovery work will be invalidated. At this time, the valve needs to be opened, the rotary evaporator needs to be turned off, the liquid in the receiving flask needs to be poured back into the rotary flask, the receiving flask needs to be washed, and the rotary recovery work needs to be restarted. Operating a rotary evaporator has a low technical content but requires high concentration of personnel. Therefore, the existing rotary evaporator consumes excessive manpower and is prone to rework. Content of the Utility Model

[0005] The purpose of the utility model is to provide an anti-overflow rotary evaporator, which solves the problem of violent boiling and spraying of materials in the existing rotary evaporator during use.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The utility model provides an anti-overflow rotary evaporator, including:

[0008] A support,

[0009] A water bath heating pot, which is arranged on one side of the support;

[0010] A rotary flask, which is placed in the water bath heating pot;

[0011] A condenser, which is arranged on the other side of the support;

[0012] A collection flask, which is connected to the lower end of the condenser;

[0013] A connecting pipe that connects the rotary flask and the condenser; and an electromagnetic vacuum valve is provided at the end of the connecting pipe away from the rotary flask.

[0014] A rotary motor is connected to the support, and the rotary motor is connected to the rotary flask through a rotary sleeve.

[0015] A vacuum controller, one end of the vacuum controller is connected to a vacuum pump, and the other end of the vacuum controller is connected to the electromagnetic vacuum valve.

[0016] Further, a lifting handle is provided on the water bath heating pot for driving the water bath heating pot to move up and down.

[0017] Further, a temperature controller is provided on the side of the water bath heating pot, and the temperature controller is used to adjust the water bath temperature of the water bath heating pot.

[0018] Further, the rotary flask is an eggplant-shaped or round-bottomed flask with a ground glass joint.

[0019] Further, a condenser tube is arranged in the condenser, and the condenser tube is a serpentine condenser tube.

[0020] Further, a discharging valve is provided at the bottom of the collecting bottle.

[0021] Further, the collecting bottle and the condenser are detachably connected by a ground glass clamp.

[0022] Further, a touch-adjustable display screen is provided on the vacuum controller for setting the vacuum critical value.

[0023] Further, the input end of the vacuum controller is connected to the control end of the electromagnetic vacuum valve.

[0024] Due to the application of the above technical solution, the present utility model has the following advantages compared with the prior art:

[0025] An anti-overflow rotary evaporator of the present utility model adds a vacuum controller on the basis of the existing rotary evaporator, and realizes automatic operation by setting a corresponding vacuum critical value. By monitoring the vacuum degree inside the instrument and comparing it with the set vacuum critical value, the electromagnetic vacuum valve is controlled to automatically open or close, ensuring that the liquid in the rotary flask does not flow into the collecting bottle. It does not require the operator to highly concentrate on manually switching the valve, effectively saving manpower and improving efficiency, and preventing rework. Description of the Drawings

[0026] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the accompanying drawings in an illustrative rather than restrictive manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0027] Figure 1 is a device diagram of a rotary evaporator for preventing material flushing provided by the present invention;

[0028] Among them, the reference numerals are explained as follows:

[0029] 1, support; 2, water bath heating pot; 201, lifting handle; 202, temperature controller; 3, rotary flask; 4, condenser; 401, condensing tube; 5, collection bottle; 501, discharging valve; 6, connecting pipe; 7, electromagnetic vacuum valve; 8, rotary motor; 9, rotary sleeve; 10, vacuum controller; 100, touch-adjustable display screen; 11, ground joint clamp. Detailed implementation manners

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0031] Refer to Figure 1 , the rotary evaporator for preventing material flushing includes a support 1, a water bath heating pot 2, a rotary flask 3, a condenser 4, a collection bottle 5, a connecting pipe 6, an electromagnetic vacuum valve 7, a rotary motor 8, a rotary sleeve 9, a vacuum controller 10 and a ground joint clamp 11.

[0032] Specifically, the aforementioned water bath heating pot 2 is arranged on one side of the support 1. The water bath heating pot 2 is used to provide the corresponding rotary evaporation temperature for the material in the rotary flask 3, and adjust the suitable rotary evaporation temperature according to the boiling point and properties of the solvent contained in the material, so as to rotary evaporate and remove the solvent or unnecessary components.

[0033] Generally speaking, when placing the rotary flask 3 in the water bath heating pot 2, it is necessary to control the water level in the water bath heating pot 2 with reference to the capacity of the rotary flask 3, and generally add it to a position 2 cm away from the edge of the pot. And, in order to avoid the formation of scale in the pot that is difficult to clean after the water in the water bath heating pot 2 is used for a long time, distilled water is generally used for heating. In addition, the medium in the water bath heating pot 2 is usually water, but when there are special temperature requirements, the medium can be replaced with substances such as silicone oil.

[0034] In the embodiment of the present utility model, a lifting handle 201 is further provided on the water bath heating pot 2, which is used to lift the water bath heating pot 2 up and down, so as to adapt to rotary flasks 3 of different capacities, and ensure the rotary evaporation effect. When the capacity of the rotary flask 3 to be rotary evaporated is small, the water bath heating pot 2 needs to be lifted to adapt to the capacity and position of the rotary flask 3.

[0035] In addition, in the embodiment of the present utility model, a temperature controller 202 is further provided on the side of the water bath heating pot 2 to adjust the water bath temperature in the water bath heating pot 2. Of course, if the water bath temperature shown by real-time digital display is higher than the actual required rotary evaporation temperature, a little ice or distilled water can also be added into the water bath heating pot 2 for cooling. When adding, try to avoid that there is no rotary flask 3 placed in the water bath heating pot 2 to prevent the sudden change of temperature in the water bath heating pot 2 from affecting the rotary evaporation effect.

[0036] In the embodiment of the present utility model, the used rotary flask 3 is an eggplant-shaped flask or a round-bottom flask with a ground joint. The setting of the ground joint is to firmly connect the rotary flask 3 with the main body components of the rotary evaporator.

[0037] In addition, in the rotary evaporator, the rotary flask 3 is inclined relative to the water bath heating pot 2. The purpose is to make the materials or solvents in the rotary flask 3 form a thinner film, thereby increasing the contact area between the material components and the steam, and improving the evaporation rate. And the inclined design makes the materials more evenly distributed during rotation, promotes mixing and reduces the deposition between the materials and the bottle wall. The inclined rotation can make the movement of the materials in the bottle more stable, reduce the bubble noise caused by violent boiling, help to maintain the stability of the evaporation process, and then ensure that the steam generated by rotary evaporation can smoothly enter the condenser 4. Therefore, the ground joint is used to prevent the inclined rotary flask 3 from falling into the water bath heating pot 2, contaminating the materials in the rotary flask 3 and increasing the workload.

[0038] Regarding how the aforementioned rotary flask 3 performs rotary operation, in the embodiment of the present utility model, a rotary motor 8 is connected to the support 1, and the rotary flask 3 is connected to the rotary motor 8 through a rotary sleeve 9, so that the rotary flask 3 is driven by the rotary motor 8 to perform rotary operation. And the rotation speed of the rotary flask 3 can be adjusted, and it is reasonably arranged according to the material state and volume size in the bottle. The rotation speed should not be too fast or too slow.

[0039] The aforementioned condenser 4 is arranged on the other side of the support 1, and is used to condense the solvent or other component materials removed from the rotary flask 3 from steam into liquid, and collect them into the connected collecting bottle 5 below. The rotary flask 3 and the condenser 4 are connected through a connecting pipe 6.

[0040] In the embodiment of the present utility model, the condenser tube 401 arranged in the condenser 4 is a serpentine condenser tube, and the serpentine condenser tube has a certain height. The inner core tube of the serpentine condenser tube is spiral-shaped, providing a larger cooling surface area, thereby improving the efficiency of steam condensation. The spiral shape of the serpentine condenser tube makes the flow path of the vapor in the condenser tube longer and increases the contact time with the cooling water. Therefore, the vapor can be quickly condensed into a liquid, reducing the loss of the solvent during the evaporation process. Of course, during actual operation, the serpentine condenser tube can also be replaced with a jacketed condenser tube or the like according to actual needs. However, other types of condenser tubes may be inferior to the serpentine condenser tube in terms of cooling efficiency or usability.

[0041] For the aforementioned collection bottle 5, it is used to receive the liquid condensed by the condenser 4. The collection bottle 5 and the condenser 4 are also connected by a ground joint interface, and are fixed by a ground joint clamp 11 as an auxiliary to complete the preliminary fixed connection. When the rotary evaporator starts to operate, the negative pressure supplied by the vacuum pump to the condenser 4 can further suck the collection bottle 5 and the condenser 4 together, preventing them from separating during the operation. A discharge valve 501 is also provided at the bottom end of the collection bottle 5 for discharging the liquid collected in the collection bottle 5.

[0042] An electromagnetic vacuum valve 7 is provided at the end of the aforementioned connecting tube 6 far from the rotary bottle 3 for breaking the vacuum of the rotary evaporator. When the material in the rotary bottle 3 boils violently or sprays during the rotary operation, the electromagnetic vacuum valve 7 can be opened to break the vacuum, releasing the negative pressure in the rotary evaporator system and restoring the system to atmospheric pressure.

[0043] In the embodiment of the present utility model, a vacuum controller 10 is also provided on the rotary evaporator, and the vacuum controller 10 is used to solve and avoid the problems of violent boiling or spraying during the operation of the rotary evaporator.

[0044] Specifically, one end of the vacuum controller 10 is connected to the vacuum pump, and a vacuum pressure gauge is provided on the vacuum pump to display the current pressure in real time. The other end of the vacuum controller 10 is connected to the aforementioned electromagnetic vacuum valve 7. During actual operation, when the vacuum pump is turned on, the vacuum pump will provide a negative pressure to the rotary evaporator system. On the one hand, the vacuum controller 10 plays a role in monitoring the real-time vacuum degree in the system. On the other hand, in the embodiment of the present utility model, a touch-adjustable display screen 100 is provided on the vacuum controller 10 for the experimenter to set the vacuum critical value. When the vacuum degree in the system reaches the set vacuum critical value, the system starts the vacuum-breaking mechanism to play a role in preventing violent boiling and spraying.

[0045] The so-called vacuum critical value is the critical state value for preventing violent boiling or spraying set during the rotary evaporation operation for different rotary evaporation materials. The selection of the vacuum critical value is adjusted according to actual needs, and can be specifically determined according to the properties of the rotary evaporation materials required.

[0046] Regarding how to start the vacuum-breaking mechanism, the input end of the above-mentioned vacuum degree controller 10 is connected to the control end of the aforementioned electromagnetic vacuum valve 7. When the pressure shown on the vacuum pressure gauge on the vacuum pump is greater than the set vacuum degree critical value, the vacuum degree controller 10 will issue an instruction to the electromagnetic vacuum valve 7, and the electromagnetic vacuum valve 7 will open to break the vacuum. When the pressure value shown on the vacuum pressure gauge is less than the aforementioned set vacuum degree critical value, the vacuum degree controller 10 will issue a closing instruction to the electromagnetic vacuum valve 7 to continue the vacuum operation.

[0047] In summary, for the anti-overflow rotary evaporator of the present utility model, on the basis of the existing rotary evaporator, a vacuum degree controller is added, and automatic operation is achieved by setting the corresponding vacuum degree critical value. By monitoring the internal vacuum degree of the instrument and comparing it with the set vacuum degree critical value, the electromagnetic vacuum valve is controlled to open or close automatically, ensuring that the liquid in the rotary bottle does not rush into the collection bottle, eliminating the need for operators to highly concentrate on manually opening and closing the valve, effectively saving manpower and improving efficiency, and preventing rework.

[0048] The above embodiments are only for illustrating the technical concept and features of the present utility model, and their purpose is to enable those familiar with this technology to understand the content of the present utility model and implement it accordingly. It should not be used to limit the protection scope of the present utility model. Any equivalent changes or modifications made according to the spirit of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A rotary evaporator for preventing material from flushing, characterized in that, Comprising: a support (1), a water bath heating pot (2), the water bath heating pot (2) being arranged on one side of the support (1); a rotary flask (3), the rotary flask (3) being placed in the water bath heating pot (2); a condenser (4), the condenser (4) being arranged on the other side of the support (1); a collection bottle (5), the collection bottle (5) being connected to the lower end of the condenser (4); a connecting pipe (6), the connecting pipe (6) communicating the rotary flask (3) and the condenser (4); and an electromagnetic vacuum valve (7) being arranged at the end of the connecting pipe (6) far from the rotary flask (3); a rotary motor (8), the rotary motor (8) being connected to the support (1), and the rotary motor (8) being connected to the rotary flask (3) through a rotary sleeve (9); a vacuum controller (10), one end of the vacuum controller (10) being connected to a vacuum pump, and the other end of the vacuum controller (10) being connected to the electromagnetic vacuum valve (7).

2. The rotary evaporator for preventing material from flushing according to claim 1, characterized in that, The water bath heating pot (2) is provided with a lifting handle (201) for driving the water bath heating pot (2) to lift up and down.

3. The rotary evaporator for preventing material from flushing according to claim 1, characterized in that, A temperature controller (202) is arranged on the side of the water bath heating pot (2), and the temperature controller (202) is used to adjust the water bath temperature of the water bath heating pot (2).

4. The rotary evaporator for preventing material from flushing according to claim 1, characterized in that, The rotary flask (3) is an eggplant-shaped or round-bottomed flask with a ground glass joint.

5. A rotary evaporator for preventing material from flushing, according to claim 1, characterized in that A condensing pipe (401) is arranged in the condenser (4), and the condensing pipe (401) is a serpentine condensing pipe.

6. The rotary evaporator for preventing material from flushing according to claim 1, wherein, A discharging valve (501) is arranged at the bottom of the collection bottle (5).

7. The rotary evaporator for preventing material from flushing according to claim 1, characterized in that, The collection bottle (5) and the condenser (4) are detachably connected through a ground glass clip (11).

8. The rotary evaporator for preventing material from flushing according to claim 1, characterized in that, The vacuum controller (10) is provided with a touch-adjustable display screen (100) for setting the vacuum critical value.

9. The rotary evaporator for preventing material from flushing according to claim 1, wherein, The input end of the vacuum controller (10) is connected to the control end of the electromagnetic vacuum valve (7).

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