Anti-overflow stirring assembly for rotary evaporator

Abstract

The utility model relates to rotary evaporator bottle technical field, concretely relates to a kind of anti-overflow stirring assembly for rotary evaporator bottle, the anti-overflow stirring assembly for rotary evaporator bottle includes stirring rod and at least one stirring vane, the stirring rod is inserted into the rod body inside rotary evaporator and is provided with at least one described stirring vane, multiple stirring holes are uniformly opened on the stirring vane. When the rotary evaporator starts to rotate in actual application, the stirring rod in the bottle rotates with the rotary evaporator, and at the same time, the blade surface of the stirring vane on the stirring rod continuously shears the liquid in the bottle, thereby playing a stirring role, making the liquid in the bottle evenly heated, to prevent violent boiling. Further based on multiple stirring holes opened on the stirring vane, while stirring liquid, liquid can also be turned upside down based on stirring hole, thereby further improving stirring efficiency, making the liquid in the bottle more evenly heated, effectively preventing liquid from violent boiling.

Description

Technical Field

[0001] This utility model relates to the field of rotary evaporator technology, specifically to an anti-overflow stirring assembly for rotary evaporators. Background Technology

[0002] Rotary evaporation, also known as rotary distillation, is primarily used for the rapid removal of solvents, concentration of target products, solvent recovery, and extraction and purification. Its basic principle is to rapidly evaporate the solvent at a set temperature through reduced pressure, rotation, and heating. However, when using a rotary evaporator to perform reduced pressure distillation of liquids in a rotary flask, localized overheating due to excessively high evaporation rates and / or uneven heating often causes the liquid in the flask to boil violently and overflow. Specifically, this violent boiling is caused by a sudden pressure drop leading to liquid overheating, delaying the formation of vaporization nuclei; subsequently, bubbles burst and expand rapidly at nucleation points (impurities, vessel walls), while surfactants stabilize the foam, hindering liquid reflux. Ultimately, the gas-liquid mixture breaks through the liquid layer, resulting in violent boiling.

[0003] Therefore, there is an urgent need for an anti-overflow stirring assembly for rotary evaporators to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to solve the problem that when using a rotary evaporator to perform vacuum distillation on liquids in a rotary evaporator flask, the liquid in the flask often boils over due to excessively high local evaporation rates and / or uneven heating, causing the liquid to overflow the flask. This invention provides an anti-overflow stirring component for rotary evaporators.

[0005] The technical solution of this utility model is as follows:

[0006] An anti-overflow stirring assembly for a rotary evaporator flask includes a stirring rod and at least one stirring blade;

[0007] The stirring rod inserted into the rotary evaporator is provided with at least one stirring blade, and the stirring blade is provided with a plurality of stirring holes evenly distributed on it.

[0008] Preferably, the stirring blade includes a round bottom with a central opening and a concave arc portion. The concave arc portion is disposed on the round bottom with its central opening aligned with the central opening of the round bottom. A plurality of stirring holes are evenly distributed through the concave arc portion and the round bottom.

[0009] Preferably, the central angle of the circle corresponding to the concave arc portion is 0°-30°.

[0010] Preferably, the vertical thickness H between the top center point of the concave arc portion and the center of the bottom circle is 0mm-4mm.

[0011] Preferably, the stirring blades are made of silicone.

[0012] Preferably, the plurality of stirring holes are evenly spaced at intervals of 30°-60° around the common axis of the circular bottom and the concave arc portion.

[0013] Preferably, the diameters of the plurality of stirring holes are the same or different.

[0014] Preferably, the diameter of the stirring hole is 4mm-8mm.

[0015] Preferably, the anti-overflow stirring assembly for the rotary evaporator includes a first stirring blade and a second stirring blade, which are spaced apart from bottom to top along the end of the rod inserted into the rotary evaporator, wherein the blade radius of the first stirring blade is smaller than that of the second stirring blade.

[0016] Preferably, when the stirring rod is inserted inside the rotary evaporator, the first stirring blade is located at the lower part of the rotary evaporator and the second stirring blade is located at the middle part of the rotary evaporator.

[0017] According to the above technical solution, based on the anti-boiling-out stirring assembly for the rotary evaporator, in practical applications, when the rotary evaporator starts to rotate, the stirring rod inside the evaporator rotates together with the evaporator. At the same time, the blades on the stirring rod continuously shear the liquid inside the evaporator, thereby playing a stirring role, making the liquid inside the evaporator heated evenly, and preventing boiling over. Furthermore, based on the multiple stirring holes opened on the stirring blades, while stirring the liquid, the liquid can also be turned up and down through the stirring holes, thereby further improving the stirring efficiency, making the liquid inside the evaporator heated more evenly, and effectively preventing the liquid from boiling over. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the anti-overflow stirring assembly for a rotary evaporator;

[0019] Figure 2 This is a schematic diagram of the front and side views of the stirring blades of the anti-overflow stirring assembly for rotary evaporators;

[0020] Figure 3 This is a top view schematic diagram of the stirring blades of an anti-overflow stirring assembly for a rotary evaporator.

[0021] Figure 4 This is a schematic diagram of the structure when the second stirring blade is set in the middle of the rotary evaporator;

[0022] Figure 5 This is a schematic diagram of the structure when the first stirring blade is set at the bottom of the rotary evaporator.

[0023] Explanation of reference numerals in the attached figures

[0024] 1. Stirring rod; 2. Stirring blade; 21. Round bottom; 22. Concave arc part; 3. Stirring hole; 4. Rotary flask. Detailed Implementation

[0025] The following provides a detailed description of the specific embodiments of this utility model. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of this utility model.

[0026] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of indicated technical features. Therefore, unless otherwise stated, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. The term "comprising" and any variations thereof mean a non-exclusive inclusion, the possibility of the presence or addition of one or more other features, units, components, and / or combinations thereof.

[0027] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] This utility model provides an anti-overflow stirring assembly for a rotary evaporator, such as... Figure 1-3 As shown, the anti-overflow stirring assembly for the rotary evaporator includes a stirring rod 1 and at least one stirring blade 2;

[0029] The stirring rod 1, inserted into the rotary evaporator 4, has at least one stirring blade 2 on its body, and the stirring blade 2 has a plurality of stirring holes 3 evenly distributed on it. Preferably, a fixing plug or fixing clamp is provided at the mouth of the rotary evaporator 4 to fix the stirring rod 1, thereby preventing the stirring assembly from becoming unstable during the rotary evaporation process.

[0030] According to the above technical solution, based on the anti-boiling-out stirring assembly for the rotary evaporator flask, in practical applications, when the rotary evaporator flask 4 starts to rotate, the stirring rod 1 inside the flask rotates together with the flask 4. At the same time, the blades 2 on the stirring rod 1 continuously shear the liquid inside the flask, thereby playing a stirring role, making the liquid inside the flask heated evenly, and preventing boiling-out. Furthermore, based on the multiple stirring holes 3 opened on the stirring blades 2, while stirring the liquid, the liquid can also be turned upside down through the stirring holes 3, thereby further improving the stirring efficiency, making the liquid inside the flask heated more evenly, and effectively preventing the liquid from boiling-out. The evaporated gas generated by rotary evaporation can be guided into the rotary evaporator through the stirring holes 3 and collected after cooling.

[0031] In the anti-overflow stirring assembly for rotary evaporators described in this utility model, such as Figure 2 and Figure 3 As shown, preferably, the stirring blade 2 includes a circular bottom 21 with a central opening and a concave arc portion 22. The concave arc portion 22 is disposed on the circular bottom 21 with its central opening aligned with the central opening of the circular bottom 21. A plurality of stirring holes 3 are evenly distributed through the concave arc portion 22 and the circular bottom 21, so that in practical applications, the liquid in the tilted and rotating rotary evaporator can be effectively stirred, so that the liquid in the flask is heated evenly, thereby effectively preventing the liquid from boiling over. Specifically, the circular bottom 21 can be understood as a circular structure. Based on its central opening, the concave arc portion 22 is similar to a volcano crater shape, with a corresponding hole at its center relative to the center of the circular bottom 21, and its thickness gradually decreases as it extends from its top towards the circular boundary of the circular bottom 21.

[0032] For further optimization, see Figure 4 and Figure 5 The central angle of the circle corresponding to the arc of the concave portion 22 is 0°-30°, and the vertical thickness H between the center point of the top of the concave portion 22 and the center of the bottom of the circle 21 is 0mm-4mm. The stirring blade 2 is made of silicone. By making the stirring blade 2 with a silicone material of a special curvature, it can achieve a moderate hardness, allowing it to unfold smoothly inside the rotary evaporator 4 during actual use and pass smoothly through its mouth, facilitating subsequent cleaning and reuse. Specifically, the diameter of the mouth of the rotary evaporator 4 is generally 28mm. Figure 2 As shown, the maximum vertical thickness H between the top center point of the concave arc portion of the stirring blade 2 and the center of the circular bottom 21 is 4mm, that is, the thickest part of the stirring blade 2 is 4mm. The diameter of the stirring rod 1 can be 3mm-5mm, preferably 4mm, and the limit width when withdrawing is 12mm, which is much smaller than the diameter of the mouth of the rotary evaporator 4.

[0033] In the anti-overflow stirring assembly for rotary evaporators described in this utility model, preferably, the plurality of stirring holes 3 are evenly spaced at intervals of 30°-60° around the common axis of the circular bottom 21 and the concave arc portion 22, as shown in the specific arrangement. Figure 3 As shown, multiple stirring holes 3 are evenly spaced at 45° intervals around the common axis of the circular bottom 21 and the concave arc portion 22, and 6-10 holes are arranged along each diameter direction of the circular bottom 21, specifically 6 holes, thereby enabling better stirring of the liquid. Figure 3 The center is the mounting hole for installing the stirring rod 1.

[0034] In another preferred embodiment, the apertures of the plurality of stirring holes 3 are the same or different, more preferably the apertures of the plurality of stirring holes 3 are different, so as to better tumble and stir the liquid in the rotary evaporator 4, increase the flow rate of the liquid, make the stirring more thorough, and thus effectively prevent the liquid from boiling over.

[0035] In one specific implementation, such as Figure 3 As shown, the diameter of the stirring hole 3 is 4mm-8mm, more specifically 6mm.

[0036] In the anti-overflow stirring assembly for rotary evaporators described in this utility model, preferably, the anti-overflow stirring assembly for rotary evaporators specifically includes a first stirring blade 2 and a second stirring blade 2. The first stirring blade 2 and the second stirring blade 2 are spaced apart from bottom to top along the end of the rod inserted into the rotary evaporator 4. The blade radius of the first stirring blade 2 is smaller than that of the second stirring blade 2, thereby better stirring the liquid in the rotary evaporator 4.

[0037] When using a rotary evaporator, the rotary evaporating flask 4 is generally tilted at 45°, and the liquid inside the flask should be 1 / 3 to 1 / 2 of the flask's volume. To ensure that both the first and second stirring blades can perform a stirring function, it is further preferred that when the stirring rod 1 is inserted inside the rotary evaporating flask 4, the first stirring blade 2 is located at the lower part of the flask body, and the second stirring blade 2 is located at the middle part of the flask body. More preferably, the second stirring blade is located at 1 / 2 of the flask body, and the first stirring blade is located at 1 / 4 of the distance from the bottom of the flask.

[0038] Specifically, such as Figure 4 As shown, the second stirring blade is positioned at 1 / 2 of the body of the rotary evaporator 4. At this point, the blade radius is equal to the body radius R, the maximum height is H (0mm ≤ H ≤ 4mm), the radius of the circle corresponding to the arc is r1, and the central angle is θ (0° ≤ θ ≤ 30°). Wherein, r1cosθ = R; That is, R 2 +(Rsecθ-H) 2 =R2 sec 2 θ.

[0039] like Figure 5 As shown, the first stirring blade is positioned at 1 / 4 of the distance from the bottom of the rotary evaporator 4, at which point the blade radius is [missing information]. The height of the thickest part is H (0mm ≤ H ≤ 4mm), the radius of the circle corresponding to the arc is r2, and the central angle is β (0° ≤ β ≤ 30°). Where r2cosβ = L; Right now

[0040] The present invention will be described in detail below through embodiments, but the scope of protection of the present invention is not limited thereto.

[0041] Example 1

[0042] Adopting such Figure 1 The rotary evaporator shown is implemented with an anti-overflow stirring assembly, specifically, the anti-overflow stirring assembly for the rotary evaporator includes a stirring rod 1 and at least one stirring blade 2;

[0043] The stirring rod 1 inserted into the rotary evaporator 4 has at least one stirring blade 2 on its body, and the stirring blade 2 has a plurality of stirring holes 3 evenly opened on it.

[0044] Specifically, the anti-overflow stirring assembly for the rotary evaporator 4 includes a first stirring blade 2 and a second stirring blade 2. The first stirring blade 2 and the second stirring blade 2 are spaced apart from bottom to top along the end of the rod body inserted into the rotary evaporator 4. The blade radius of the first stirring blade 2 is smaller than that of the second stirring blade 2. When the stirring rod 1 is inserted into the rotary evaporator 4, the first stirring blade 2 is located at the lower 1 / 4 of the rotary evaporator 4, and the second stirring blade 2 is located at the middle 1 / 2 of the rotary evaporator 4.

[0045] In practical applications, the preparation work before rotary evaporation is first completed according to the existing rotary evaporation operation steps. Then, the stirring assembly is installed in the rotary evaporation flask 4, and rotary evaporation is carried out according to the conventional rotary evaporation steps. Specifically, when the rotary evaporation flask 4 starts to rotate, the stirring rod 1 inside the flask rotates together with the rotary evaporation flask 4. At the same time, the blades 2 on the stirring rod 1 continuously shear the liquid in the flask, thereby playing a stirring role, so that the liquid in the flask is heated evenly and prevents boiling over. Furthermore, based on the multiple stirring holes 3 opened on the stirring blades 2, while stirring the liquid, the liquid can also be turned up and down through the stirring holes, thereby further improving the stirring efficiency, making the liquid in the flask heated more evenly, and effectively preventing the liquid from boiling over.

[0046] Testing has shown that the anti-boiling stirring assembly for rotary evaporators described in this invention improves the heating uniformity of the liquid inside the rotary evaporator compared to existing rotary evaporation processes that do not use this stirring assembly, thereby effectively preventing the liquid from boiling over.

[0047] Example 2

[0048] Referring to Embodiment 1, the difference is that the stirring blade 2 includes a circular bottom 21 with a central opening and a concave arc portion 22. The concave arc portion 22 is disposed on the circular bottom 21 with its central opening aligned with the central opening of the circular bottom 21. A plurality of stirring holes 3 are evenly distributed through the concave arc portion 22 and the circular bottom 21. The central angle of the circle corresponding to the arc of the concave arc portion is 25°. The vertical thickness H between the top center point of the concave arc portion 22 and the center of the circular bottom 21 is 4 mm. The stirring blade 2 is made of silicone.

[0049] Testing revealed that, compared to the solution in Example 1, the anti-overflow stirring assembly for rotary evaporators described in this invention can further improve the heating uniformity of the liquid inside the rotary evaporator, thereby effectively preventing the liquid from boiling over. At the same time, the stirring assembly can smoothly unfold inside the rotary evaporator and pass smoothly through its mouth, facilitating subsequent cleaning and reuse.

[0050] Example 3

[0051] The implementation is similar to Embodiment 2, except that a plurality of stirring holes 3 are evenly spaced at 45° intervals around the common axis of the circular bottom 21 and the concave arc portion 22, and the diameters of the plurality of stirring holes 3 are different, with the diameter of the stirring hole 3 being 6 mm.

[0052] Testing revealed that the anti-overflow stirring assembly for rotary evaporators described in this invention, compared to the solution in Example 2, can further improve the heating uniformity of the liquid inside the rotary evaporator based on effective stirring, thereby effectively preventing the liquid from boiling over.

[0053] The anti-boiling-out stirring assembly for rotary evaporators provided by this utility model, in practical applications, when the rotary evaporator starts to rotate, the stirring rod inside the evaporator rotates together with the evaporator. At the same time, the blades on the stirring rod continuously shear the liquid inside the evaporator, thereby playing a stirring role, making the liquid inside the evaporator heated evenly, and preventing boiling over. Furthermore, based on the multiple stirring holes opened on the stirring blades, while stirring the liquid, the liquid can also be turned up and down through the stirring holes, thereby further improving the stirring efficiency, making the liquid inside the evaporator heated more evenly, and effectively preventing the liquid from boiling over.

[0054] The preferred embodiments of this utility model have been described in detail above; however, this utility model is not limited thereto. Within the scope of the technical concept of this utility model, various simple modifications can be made to the technical solution of this utility model. To avoid unnecessary repetition, this utility model will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed by this utility model and all fall within the protection scope of this utility model.

Claims

1. A spill-proof stirring assembly for a rotary evaporator flask, characterized in that, The anti-overflow stirring assembly for the rotary evaporator includes a stirring rod (1) and at least one stirring blade (2); The stirring rod (1) inserted into the rotary evaporator (4) has at least one stirring blade (2) on its body, and the stirring blade (2) has a plurality of stirring holes (3) evenly distributed on it.

2. The anti-overflow stirring assembly for a rotary evaporator flask according to claim 1, characterized in that, The stirring blade (2) includes a round bottom (21) with a central opening and a concave arc portion (22). The concave arc portion (22) is arranged on the round bottom (21) with its central opening aligned with the central opening of the round bottom (21). A plurality of stirring holes (3) are evenly opened through the concave arc portion (22) and the round bottom (21).

3. The anti-overflow stirring assembly for a rotary evaporator flask according to claim 2, characterized in that, The central angle of the circle corresponding to the arc of the concave part (22) is 0°-30°.

4. The anti-overflow stirring assembly for a rotary evaporator flask according to claim 2, characterized in that, The vertical thickness H between the top center point of the concave arc portion (22) and the center of the circular bottom portion (21) is 0mm-4mm.

5. The anti-overflow stirring assembly for a rotary evaporator flask according to any one of claims 1-4, characterized in that, The stirring blade (2) is made of silicone.

6. The anti-overflow stirring assembly for a rotary evaporator flask according to claim 2, characterized in that, Multiple stirring holes (3) are evenly spaced at intervals of 30°-60° around the common axis of the circular bottom (21) and the concave arc portion (22).

7. The anti-overflow stirring assembly for a rotary evaporator flask according to claim 1 or 6, characterized in that, The diameters of the multiple stirring holes (3) may be the same or different.

8. The anti-overflow stirring assembly for a rotary evaporator flask according to claim 1 or 6, characterized in that, The diameter of the stirring hole (3) is 4mm-8mm.

9. The anti-overflow stirring assembly for a rotary evaporator flask according to claim 1, characterized in that, The anti-overflow stirring assembly for the rotary evaporator includes a first stirring blade (2) and a second stirring blade (2). The first stirring blade (2) and the second stirring blade (2) are spaced apart from bottom to top along the end of the rod inserted into the rotary evaporator (4). The blade radius of the first stirring blade (2) is smaller than that of the second stirring blade (2).

10. The anti-overflow stirring assembly for a rotary evaporator flask according to claim 9, characterized in that, When the stirring rod (1) is inserted inside the rotary evaporator (4), the first stirring blade (2) is located at the lower part of the rotary evaporator (4), and the second stirring blade (2) is located at the middle part of the rotary evaporator (4).

Images