A blowout preventer for a rotary evaporator

Abstract

The utility model discloses a kind of experimental rotary evaporator blowout preventers, it is related to experimental apparatus technical field, including splash-proof ball, rotary evaporator bottle and rotary knife group, the splash-proof ball is inserted in rotary evaporator bottle, the rotary knife group is installed in the neck of rotary evaporator bottle, the rotary knife group includes shaft, ceramic bearing and spiral blade, the bottom of the shaft is provided with elastic telescopic link, the top of telescopic link is provided with arc backrest, the top of the shaft is provided with limit rod, the neck of rotary evaporator bottle is correspondingly provided with limit groove to limit rod, the spiral blade is rotatably arranged in the side of shaft close to bottle body by ceramic bearing, the outer edge of the spiral blade is comb tooth shape. The utility model is convenient to install, can improve the breaking efficiency of bubble in rotary evaporation process, effectively reduce the violent boiling situation caused by bubble.

Description

Technical Field

[0001] This utility model belongs to the field of experimental instrument technology, specifically relating to a spray prevention device for an experimental rotary evaporator. Background Technology

[0002] A rotary evaporator, also known as a rotary distillation apparatus, is a commonly used laboratory device. It consists of a motor, a distillation flask, a heating pan, and a condenser. It is mainly used for the continuous distillation of volatile solvents under reduced pressure and is applied in fields such as chemistry, chemical engineering, and biomedicine.

[0003] When using a rotary evaporator, some liquids containing foaming substances may experience violent boiling and splashing during the distillation process. This causes some solution to splash from the evaporating flask into the receiving flask connected to the evaporating flask, resulting in mixing of the solution with the separated solvent. This affects the experimental process and the accuracy of experimental data, and in severe cases, can even cause danger. Currently, existing technologies generally reduce the occurrence of violent boiling by directly adding cotton balls or sand cores to the anti-splash ball. However, in actual use, some solutions produce a large number of bubbles after boiling, and these two methods cannot effectively and quickly reduce the occurrence of violent boiling.

[0004] Chinese utility model patent CN217593867U discloses a rotary evaporator equipped with a solid anti-bubbling device. By placing a blade between the rotating flask and the anti-splash tube, the blade is used to break up the bubbles generated by the solution and reduce the occurrence of boiling. However, the blade is located inside the anti-splash tube, far from the liquid surface, and cannot deal with the source of foam generated inside the rotating flask. When the steam rises, the bubbles have already merged and become larger, resulting in low breaking efficiency. Furthermore, the blade is only suitable for low-viscosity liquids. High-viscosity liquids can easily lead to excessive resistance, and the blade may become blocked or sticky, losing its defoaming effect.

[0005] Therefore, how to provide a spray prevention device for experimental rotary evaporators with higher defoaming efficiency has become a problem that needs to be considered by those skilled in the art. Utility Model Content

[0006] In view of this, the present invention provides a spray prevention device for a rotary evaporator. Through the structural design of the rotating blade assembly, the spiral blades are arranged at the root of the neck of the rotary evaporator flask to directly destroy the initial bubbles. The structure of the spiral comb teeth has both cutting and guiding functions, which can tear the bubbles into smaller droplets, reduce the height of the foam layer, and effectively reduce the boiling caused by bubbles.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A splash-proof device for a rotary evaporator includes a splash-proof ball, a rotary evaporator flask, and a rotating blade assembly. The splash-proof ball is inserted into the rotary evaporator flask, and the rotating blade assembly is installed inside the neck of the flask. The rotating blade assembly includes a rotating shaft, a ceramic bearing, and a spiral blade. The bottom of the rotating shaft is symmetrically provided with elastic telescopic rods, and the top of the telescopic rods is provided with an arc-shaped backing plate. The top of the rotating shaft is provided with a limit rod, and the neck of the rotary evaporator flask is provided with a limit groove corresponding to the limit rod. The spiral blade is rotatably mounted on the side of the rotating shaft near the flask body via the ceramic bearing, and the outer edge of the spiral blade is comb-shaped.

[0009] Furthermore, the bottleneck of the rotary evaporator is stepped, including a first bottleneck section and a second bottleneck section, the diameter of the first bottleneck section is larger than that of the second bottleneck section, and the splash guard is inserted into the first bottleneck section.

[0010] Furthermore, the limiting groove is disposed at the top of the second bottleneck segment at the junction of the second bottleneck segment and the first bottleneck segment.

[0011] Furthermore, the tooth gap of the spiral blade is 5-8 mm.

[0012] Furthermore, the spiral blade is made of stainless steel or ceramic.

[0013] Furthermore, the surface of the spiral blade is coated with a Teflon hydrophobic layer.

[0014] Furthermore, the shaft is a titanium alloy shaft.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model uses a limiting groove and an arc-shaped block to fix the axial position of the blade to prevent eccentric vibration. The spiral blade is installed at the root of the neck of the rotary evaporator near the liquid surface to directly break the newly formed bubbles. At this time, the bubbles are small in volume and high in density in the early stage of rising, and the breaking efficiency is the highest. The structure of the spiral comb teeth allows the blade to generate greater shearing force when rotating. Because the spiral shape can guide the liquid flow and increase the contact opportunity with the bubbles, the bubbles are broken more effectively. The gap between the comb teeth also helps to capture and break larger bubbles.

[0017] 2. The spiral comb blades of this utility model disperse liquid pressure through spiral flow, which can stably handle liquids with a viscosity of less than 500 cP. The gaps between the comb teeth form an air convection channel, reducing local high temperature areas and preventing the blades from jamming due to thermal deformation. In addition, the comb teeth of this application are evenly distributed and the center of gravity is close to the rotation axis, which reduces the vibration caused by centrifugal force (the center of gravity of straight blades is concentrated, which is prone to violent vibration when rotating at high speed, resulting in wear of seals and increased noise). The comb-shaped blade design makes the steam flow form a symmetrical thrust, which can also counteract unbalanced torque.

[0018] 3. This utility model sets the comb tooth spacing to 5-8mm to allow solid particles to pass through, improving anti-clogging ability, and sprays a Teflon hydrophobic layer on the surface to reduce the probability of material adhesion. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the connection between the splash-proof ball and the rotary evaporator flask of this utility model;

[0020] Figure 2 This is a schematic diagram of the rotating blade assembly structure of this utility model.

[0021] In the diagram: 1. Anti-splash ball; 2. Rotary flask; 3. Spinning shaft; 4. Spiral blade; 5. Flexible telescopic rod; 6. Arc-shaped backing plate; 7. Limiting rod. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "horizontal," "inner," "outer," and "one side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example 1

[0025] like Figure 1-2As shown, this embodiment discloses a splash-proof device for an experimental rotary evaporator, including a splash-proof ball 1, a rotary evaporator 2, and a rotating blade assembly. The splash-proof ball 1 is inserted into the rotary evaporator 2 and is used to prevent solution spraying caused by bumping. The rotating blade assembly is installed inside the neck of the rotary evaporator 2 and includes a rotating shaft 3, a ceramic bearing, and a spiral blade 4. A flexible telescopic rod 5 is symmetrically installed at the bottom of the rotating shaft 3, and an arc-shaped support plate 6 is provided at the top of the telescopic rod. A limiting rod 7 is horizontally fixed at the top of the rotating shaft 3. A limiting groove is provided at the neck of the rotary evaporator 2 corresponding to the limiting rod 7. The axial position of the blade is fixed by the limiting groove and the arc-shaped support plate 6 to prevent eccentric vibration and facilitate the removal of the rotating blade assembly and cleaning of the rotary evaporator 2. The spiral blade 4 is rotatably mounted on the side of the rotating shaft 3 near the body of the flask via the ceramic bearing. The outer edge of the spiral blade 4 is comb-shaped. The spiral blade 4 is designed with a helical comb shape, which has both cutting and guiding functions, tearing bubbles into smaller droplets and reducing the height of the foam layer.

[0026] As a preferred embodiment of the present invention, the neck of the rotary evaporator 2 is stepped, including a first neck section and a second neck section. The diameter of the first neck section is larger than that of the second neck section. The limiting groove is set at the top of the second neck section at the junction of the second neck section and the first neck section. When the anti-splash ball 1 is inserted into the first neck section, it just abuts against the limiting rod 7.

[0027] As a preferred embodiment of this utility model, the spiral blade 4 is made of stainless steel or ceramic, and the rotating shaft 3 is made of titanium alloy to reduce frictional resistance and adapt to strong acid, strong alkali and organic solvent environments; the surface of the spiral blade 4 is coated with a Teflon hydrophobic layer to reduce the probability of material adhesion; the tooth gap of the spiral blade 4 is 5-8mm to allow solid particles to pass through, and when the blade rotates at high speed, the centrifugal force throws the solid particles toward the bottle wall to avoid jamming.

[0028] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A spray prevention device for an experimental rotary evaporator, characterized in that, The device includes a splash guard, a rotary evaporator flask, and a rotating blade assembly. The splash guard is inserted into the rotary evaporator flask, and the rotating blade assembly is installed inside the neck of the flask. The rotating blade assembly includes a rotating shaft, a ceramic bearing, and a spiral blade. The bottom of the rotating shaft is symmetrically provided with elastic telescopic rods, and the top of the telescopic rods is provided with an arc-shaped backing plate. The top of the rotating shaft is provided with a limit rod, and the neck of the rotary evaporator flask is provided with a limit groove corresponding to the limit rod. The spiral blade is rotatably mounted on the side of the rotating shaft close to the flask body via the ceramic bearing, and the outer edge of the spiral blade is comb-shaped.

2. The anti-spray device for an experimental rotary evaporator according to claim 1, characterized in that, The evaporator has a stepped neck, comprising a first neck section and a second neck section. The diameter of the first neck section is larger than that of the second neck section, and the anti-splash ball is inserted into the first neck section.

3. The anti-spray device for an experimental rotary evaporator according to claim 2, characterized in that, The limiting groove is located at the top of the second bottleneck section, which is the junction of the second bottleneck section and the first bottleneck section.

4. The anti-spray device for an experimental rotary evaporator according to claim 1, characterized in that, The tooth gap of the spiral blade is 5-8mm.

5. The anti-spray device for an experimental rotary evaporator according to claim 1, characterized in that, The spiral blade is made of stainless steel or ceramic.

6. The anti-spray device for an experimental rotary evaporator according to claim 1, characterized in that, The surface of the spiral blade is coated with a Teflon hydrophobic layer.

7. The anti-spray device for an experimental rotary evaporator according to claim 1, characterized in that, The shaft is a titanium alloy shaft.

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