Rotary evaporator

Abstract

The utility model discloses a rotary evaporator which at least comprises a gas-guide tube with a first end and a second end, a condenser communicated with the first end of the gas-guide tube, a dropping funnel communicated with the bottom of the condenser, an evaporation bottle communicated with the second end of the gas-guide tube, a first switch valve and a second switch valve, the plurality of nozzles are sequentially arranged in the dropping funnel in the height direction; the rotating piece is rotationally installed on the peripheral side of the second end of the air guide pipe in a threaded mode, the blocking assembly is arranged at the second end of the air guide pipe, and the blocking assembly ascends at the second end of the air guide pipe along with the rotating piece to open the second end of the air guide pipe. The second end of the gas-guide tube is blocked along with the descending of the rotating piece at the second end of the gas-guide tube; according to the utility model, the problem that the evaporation bottle needs to be vacuumized for the second time due to the fact that the vacuum environment in the evaporation bottle is damaged when the rotary evaporator is subjected to segmented sampling can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pharmaceutical experimental equipment, in particular to a rotary evaporator. Background Art

[0002] Rotary evaporator, also known as rotary evaporator, is usually used for continuous distillation of volatile solvents. It is suitable for reflux operation, rapid evaporation of large amounts of solvents, concentration of trace components, etc. Its principle is usually that the evaporating tank is placed in a water bath and heated and rotated at a constant temperature, and the solution in the evaporating tank is heated and evaporated in the evaporating tank.

[0003] The currently used rotary evaporator requires the evaporating flask to be vacuumed during use. The liquid stored in the vacuumed evaporating flask is easily heated and evaporated. However, when the evaporated liquid is sampled in sections, the evaporating flask is at normal pressure. After sampling, the evaporating flask needs to be vacuumed again, which is time-consuming and labor-intensive, and is not conducive to improving experimental efficiency. Utility Model Content

[0004] In order to overcome the above shortcomings, the purpose of the present invention is to provide a rotary evaporator.

[0005] In order to achieve the above objectives, the technical solution adopted by this utility model is:

[0006] The device comprises at least an air guide tube having a first end and a second end, a condenser connected to the first end of the air guide tube, a dropping funnel connected to the bottom of the condenser, and an evaporating flask connected to the second end of the air guide tube, and further comprises:

[0007] A first on-off valve and a second on-off valve are sequentially arranged in the dropping funnel in a height direction;

[0008] A rotating member and a sealing assembly, wherein the rotating member is threadably mounted on the outer peripheral side of the second end of the air duct, and the sealing assembly is configured at the second end of the air duct. The sealing assembly opens the second end of the air duct as the rotating member rises at the second end of the air duct, and blocks the second end of the air duct as the rotating member descends at the second end of the air duct.

[0009] In the preferred technical solution of the above rotary evaporator, the blocking component at least includes:

[0010] a blocking head, which is arranged inside the second end of the air duct via an elastic member, and blocks the second end of the air duct by means of the elastic force of the elastic member;

[0011] A first magnet and a second magnet, wherein the first magnet is arranged on the rotating member, and the second magnet is arranged on the sealing head, and the first magnet and the second magnet are magnetically attracted to each other.

[0012] In the preferred technical solution of the above rotary evaporator, the rotating member and the evaporating flask are connected by an elastic clamp.

[0013] In the preferred technical solution of the above rotary evaporator, the elastic clamp has an insertion end and a locking end opposite to each other, the insertion end can be inserted into the rotating member, and the locking end is adapted to and locked on the bottleneck of the evaporating flask.

[0014] In the preferred technical solution of the above rotary evaporator, the outer surface of the elastic clamp is provided with a rubber heat insulation layer.

[0015] In the preferred technical solution of the rotary evaporator, an insertion hole is provided on the outer surface of the rotating member, and the insertion end of the elastic clamp is inserted into the insertion hole.

[0016] In the preferred technical solution of the above rotary evaporator, the plugging head is a hollow structure.

[0017] In the preferred technical solution of the above rotary evaporator, the elastic member is a spring.

[0018] In the preferred technical solution of the above rotary evaporator, a PTFE coating is sprayed inside the air guide tube.

[0019] The beneficial effect of the present invention is that when the liquid in the dropping funnel is collected in sections, the first switch valve is opened to allow the liquid to enter between the first switch valve and the second switch valve, and then the first switch valve is closed and the second switch valve is opened, so that segmented sampling can be achieved, the vacuum effect in the air guide tube is maintained, the problem of secondary vacuuming is avoided, the experimental process is simplified, and it is practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the main view of the utility model;

[0021] Figure 2 This is a diagram showing the connection between the air guide tube, the rotating part, and the elastic clamp;

[0022] Figure 3 is a schematic diagram of an airway tube and a blocking component;

[0023] Figure 4 is a schematic diagram of an elastic clamp;

[0024] In the figure: air guide tube 1, condenser 2, dropping funnel 3, evaporating flask 4, first switch valve 5, second switch valve 6, rotating part 7, jack 71, blocking assembly 8, blocking head 81, elastic part 82, first magnet 83, second magnet 84, water bath 9, base 10, elastic clamp 11, insertion end 111, locking end 112. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0026] It should be noted that in the description of this utility model, terms such as "upper," "lower," "left," "right," "front," and "rear" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or component described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Furthermore, it should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "connected" should be understood in a broad sense, for example, to refer to fixed connections, detachable connections, or integral connections. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0028] like Figures 1 to 4 As shown, the rotary evaporator of the present invention comprises at least an air duct 1 having a first end and a second end, a condenser 2 connected to the first end of the air duct 1, a dropping funnel 3 connected to the bottom of the condenser 2, and an evaporating flask 4 connected to the second end of the air duct 1. The rotary evaporator also comprises: a first on-off valve 5 and a second on-off valve 6, which are sequentially arranged in the dropping funnel 3 in the height direction; a rotating member 7 and a blocking assembly 8, wherein the rotating member 7 is threadedly mounted on the outer peripheral side of the second end of the air duct 1, and the blocking assembly 8 is arranged at the second end of the air duct 1. The blocking assembly 8 opens the second end of the air duct 1 as the rotating member 7 rises at the second end of the air duct 1, and blocks the second end of the air duct 1 as the rotating member 7 descends at the second end of the air duct 1.

[0029] See also Figure 1 The air guide tube 1 and the dropping funnel 3 are both mounted on a base 10 , and a water bath 9 that can be raised and lowered by a driving cylinder is also provided on the base 10 , wherein the evaporating flask 4 is located directly above the water bath 9 .

[0030] See also Figure 1 、 Figure 3A vent valve is installed at the first end of the air duct 1, an evaporation flask 4 is installed at the second end of the air duct 1, a rotating member 7 is arranged on the outer peripheral side of the second end of the air duct 1, and a blocking component 8 is arranged inside the second end of the air duct 1. When the rotating member 7 rises at the second end of the air duct 1, the blocking component 8 rises synchronously with the rotating member 7 to make the inside of the air duct 1 and the evaporation flask 4 conductive. When the rotating member 7 descends at the second end of the air duct 1, the blocking component 8 descends synchronously with the rotating member 7 to prevent the inside of the air duct 1 from being connected to the evaporation flask 4.

[0031] When the rotary evaporator of the present application is in operation, the rotating member 7 is first controlled to move upward at the second end of the air duct 1 so that the blocking assembly 8 does not block the second end of the air duct 1. At the same time, the air release valve at the first end of the air duct 1 is closed. Then, the evaporating flask 4 is heated by a water bath 9, and the inside of the air duct 1 and the evaporating flask 4 are evacuated by a vacuum device to vaporize the liquid in the evaporating flask 4. The vaporized liquid enters the condenser 2 through the air duct 1 and is cooled and liquefied by the condenser. Finally, the liquefied liquid is collected in the dropping funnel 3, and the first switch valve and the second switch valve 6 are opened synchronously at this time. , the collection of liquid can be realized; when it is necessary to collect the liquid in the dropping funnel 3 in sections, the first switch valve 5 is first opened to allow the liquid to enter between the first switch valve 5 and the second switch valve 6, and then the first switch valve 5 is closed and the second switch valve 6 is opened to realize segmented sampling. By detecting the sampling results, the experimental evaporation ratio of the rotary evaporator can be analyzed and determined. By controlling the first switch valve 5 and the second switch valve 6, the vacuum effect in the air guide tube 1 can be maintained, avoiding the problem of secondary vacuuming, simplifying the experimental process, and having practicality.

[0032] In addition, when the liquid in the evaporating flask 4 is less or has evaporated completely, the rotary member 7 is used to control the blocking assembly 8 to move downward to isolate the air duct 1 from the evaporating flask 4, so that when the evaporating flask 4 is removed and refilled with liquid, the air duct 1 is still in a vacuum state, further reducing the vacuuming time, improving the experimental efficiency of the rotary evaporator, and having high efficiency.

[0033] In one or more embodiments, the sealing assembly 8 includes at least: a sealing head 81, which is configured inside the second end of the air duct 1 through an elastic member 82, and with the help of the elastic force of the elastic member 82, the sealing head 81 seals the second end of the air duct 1; a first magnet 83 and a second magnet 84, the first magnet 83 is configured on the rotating member 7, and the second magnet 84 is configured on the sealing head 81, and the first magnet 83 and the second magnet 84 are magnetically attracted to each other.

[0034] See also Figure 3In the initial state, the blocking head 81 is pushed to a stationary position by the elastic member 82 to isolate the air duct 1 from the evaporating flask 4; at the beginning of the experiment, the rotating member 7 is rotated to drive the first magnet 83 to move upward at the second end of the air duct 1. The first magnet 83 is magnetically attracted to the second magnet 84, and the second magnet 84 drives the blocking head 81 to overcome the elastic force of the elastic member 82 and move upward, thereby connecting the inside of the air duct 1 to the rotating flask. It has the characteristics of simple structure and convenient operation.

[0035] In one or more embodiments, the rotating member 7 and the evaporating flask 4 are connected by an elastic clamp 11; the elastic clamp 11 has an insertion end 111 and a locking end 112 opposite to each other, wherein the insertion end 111 can be inserted into the rotating member 7, and the locking end 112 is adapted to and locked to the bottleneck of the evaporating flask 4; the outer surface of the elastic clamp 11 is covered with a rubber insulation layer; the outer surface of the rotating member 7 is provided with an insertion hole 71, and the insertion end 111 of the elastic clamp 11 is inserted into the insertion hole 71.

[0036] See also Figures 1 to 4 The locking end 112 of the elastic clamp 11 is adapted to the bottleneck of the evaporating flask 4, and the locking end 112 of the elastic clamp 11 is semicircular; in the initial state, the sealing head 81 is pushed to the static position under the action of the elastic member 82 to block the second end of the air duct 1; during the experiment, after the evaporating flask 4 is connected to the second end of the air duct 1, the insertion end 111 of the elastic clamp 11 is inserted into the insertion hole 71 of the rotating member 7, and the locking end 112 is arranged on the bottleneck of the evaporating flask 4. Thereafter, the rotating member 7 is rotated to drive the first magnet 83 to rise at the second end of the air duct 1, so that the sealing head 81 no longer blocks the second end of the air duct 1. When the rotating member 7 rises, the elastic clamp 11 can pull the bottleneck of the evaporating flask 4 upward, further improving the sealing degree of the connection between the evaporating flask 4 and the air duct 1, and ensuring the vacuum degree inside the air duct 1 and the evaporating flask 4.

[0037] In one or more embodiments, the plugging head 81 is a hollow structure. This configuration can reduce the overall weight of the plugging assembly 8.

[0038] In one or more embodiments, the elastic member 82 is a spring.

[0039] In one or more embodiments, a PTFE coating is sprayed inside the air duct 1. It should be noted that PTFE has a certain lubricating effect. This configuration can reduce the possibility of gas and liquid adhering to the air duct 1 and improve the evaporation recovery rate.

[0040] The above implementation methods are only for illustrating the technical concept and features of the utility model. Its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the scope of protection of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the scope of protection of the utility model.

Claims

1. A rotary evaporator comprising at least an air duct having a first end and a second end, a condenser connected to the first end of the air duct, a dropping funnel connected to the bottom of the condenser, and an evaporating flask connected to the second end of the air duct, wherein: Also includes: A first on-off valve and a second on-off valve are sequentially arranged in the dropping funnel in a height direction; A rotating member and a sealing assembly, wherein the rotating member is threadably mounted on the outer peripheral side of the second end of the air duct, and the sealing assembly is configured at the second end of the air duct. The sealing assembly opens the second end of the air duct as the rotating member rises at the second end of the air duct, and blocks the second end of the air duct as the rotating member descends at the second end of the air duct.

2. The rotary evaporator according to claim 1, wherein: The blocking component at least comprises: a blocking head, which is arranged inside the second end of the air duct via an elastic member, and blocks the second end of the air duct by means of the elastic force of the elastic member; A first magnet and a second magnet, wherein the first magnet is arranged on the rotating member, and the second magnet is arranged on the sealing head, and the first magnet and the second magnet are magnetically attracted to each other.

3. The rotary evaporator according to claim 1, wherein: The rotating member and the evaporating flask are connected via an elastic clamp.

4. The rotary evaporator according to claim 3, wherein: The elastic clamp has an inserting end and a locking end opposite to each other, wherein the inserting end can be inserted into the rotating member, and the locking end is adapted to and locked on the bottleneck of the evaporating flask.

5. The rotary evaporator according to claim 3, wherein: The outer surface of the elastic clamp is covered with a rubber heat insulation layer.

6. The rotary evaporator according to claim 4, wherein: An inserting hole is provided on the outer surface of the rotating member, and the inserting end of the elastic clamp is inserted into the inserting hole.

7. The rotary evaporator according to claim 2, wherein: The plugging head is a hollow structure.

8. The rotary evaporator according to claim 2, wherein: The elastic member is a spring.

9. The rotary evaporator according to claim 1, wherein: The air guide tube is sprayed with a PTFE coating.

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