CN110404283B - Rotary evaporator capable of accurately and quantitatively concentrating multiple samples at one time - Google Patents
Rotary evaporator capable of accurately and quantitatively concentrating multiple samples at one time Download PDFInfo
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- CN110404283B CN110404283B CN201910850616.0A CN201910850616A CN110404283B CN 110404283 B CN110404283 B CN 110404283B CN 201910850616 A CN201910850616 A CN 201910850616A CN 110404283 B CN110404283 B CN 110404283B
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- 238000004821 distillation Methods 0.000 claims abstract description 226
- 239000007788 liquid Substances 0.000 claims abstract description 56
- 238000005485 electric heating Methods 0.000 claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims description 29
- 238000010438 heat treatment Methods 0.000 claims description 21
- 238000000227 grinding Methods 0.000 claims description 19
- 239000000523 sample Substances 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 210000005239 tubule Anatomy 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 2
- 239000012141 concentrate Substances 0.000 description 17
- 238000001704 evaporation Methods 0.000 description 14
- 230000008020 evaporation Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000002390 rotary evaporation Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000005337 ground glass Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/08—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in rotating vessels; Atomisation on rotating discs
- B01D3/085—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in rotating vessels; Atomisation on rotating discs using a rotary evaporator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/10—Vacuum distillation
- B01D3/106—Vacuum distillation with the use of a pump for creating vacuum and for removing the distillate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/42—Regulation; Control
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention relates to the technical field of chemical experimental equipment, in particular to a rotary evaporator, and particularly relates to a rotary evaporator capable of accurately and quantitatively concentrating a plurality of samples at one time. The rotary evaporator capable of accurately and quantitatively concentrating a plurality of samples at one time changes one distillation flask of the original rotary evaporator into a distillation flask group of at least two distillation flasks, changes a raw water (oil) bath pot into an electric heating belt, sequentially connects each distillation flask in the distillation flask group in series and rotates along the same axis, the declination angle between the rotation axis and the horizontal plane is a certain degree between 2 and 44, and a bracket is arranged between each two distillation flasks for supporting. The liquid outlet is formed at the lowest liquid level of the working position of each distillation flask and is connected with a scale metering tubule, a valve is respectively arranged on the upper part and the lower part of the scale metering tubule, when the amount of concentrated solution reaches the designed accurate amount, the rotation is immediately stopped, and the two valves are matched for opening and closing, so that the accurate quantitative discharge of the concentrated solution in each distillation flask can be realized on the premise that the distillation flask is not required to be disassembled and the negative pressure in the system is not greatly influenced.
Description
Technical Field
The invention relates to the technical field of chemical experimental equipment, in particular to a rotary evaporator, and particularly relates to a rotary evaporator capable of accurately and quantitatively concentrating a plurality of samples at one time.
Background
The rotary evaporator is extraction experimental equipment for carrying out reduced pressure distillation concentration on materials, and is widely applied to experiments such as scale concentration, drying, extraction recovery and the like of samples, in particular to rapid distillation of a large amount of solvents. The existing rotary evaporator is generally composed of components such as a vacuumizing device, a heating device, a condensing device, a rotating device and the like, the principle of the rotary evaporator is mainly controlled by electronic equipment, a flask is enabled to rotate at a constant speed under the most suitable rotating speed, a solvent is enabled to form a film, the evaporating area is increased, the evaporating flask is enabled to be in a negative pressure state through a vacuum pump, the evaporating flask is placed in a water bath pot or an oil bath pot to be heated at a constant temperature while rotating, the heating temperature can be close to the boiling point of the solvent, and the solution in the flask is enabled to be heated and diffused to evaporate under the negative pressure, so that the rapid evaporation of the solvent is realized.
The existing rotary evaporator can only distill one sample at a time in the use process, and has low working efficiency. The existing parallel evaporator can be used for evaporating and concentrating a plurality of samples at one time, but evaporating and concentrating are completed through a plurality of test tube-shaped evaporating pipes which are arranged vertically and parallelly in a vibrating mode under negative pressure, and the evaporating area of each sample is far smaller than that of a rotary evaporator, so that the working efficiency is low. In addition, on the premise that the negative pressure in the system is not greatly influenced, the distillation is stopped when the amount of the concentrated solution in the distillation flask or the evaporation tube is in the distillation process, so that the set accurate amount of the concentrated solution cannot be accurately determined and controlled.
Disclosure of Invention
The invention provides a rotary evaporator capable of accurately and quantitatively concentrating a plurality of samples at one time, solves the problem of low efficiency that one rotary evaporator can only distill one sample at one time, and also solves the problem of accurately and quantitatively controlling concentrated solution on the premise of not greatly influencing the negative pressure in a system.
In order to achieve the above object, the present invention provides a rotary evaporator capable of accurately quantitatively concentrating a plurality of samples at a time, comprising: the bracket is fixedly provided with a rotating motor;
the rotary motor drives the distillation flask group to rotate through a transmission body (the rotary evaporator is also provided with a control panel for controlling the rotating speed and the heating temperature of the rotary motor, which is not shown in the figure), one end of the transmission body is fixed with a detachable distillation flask group, and the other end is fixed with a detachable condenser;
the bottom of the condenser is connected with a collecting bottle;
the set of distillation flasks comprises at least 2 distillation flasks;
preferably, the distillation flask group comprises 2-6 distillation flasks;
each distillation bottle of the distillation bottle group is sequentially connected in series and rotates along the same axis;
the rotation axis and the horizontal plane have a declination angle which is a certain degree between 2 and 44;
preferably, the declination angle is a certain degree between 5 and 40;
further preferably, the declination angle is a certain degree between 10 and 35;
the distillation bottle group comprises a first distillation bottle, a second distillation bottle and the like from the near to the far according to the distance between the distillation bottle group and the transmission body, wherein the distillation bottle farthest from the transmission body is provided with 2 bottle openings, namely a first bottle opening and a third bottle opening, and the rest of the distillation bottle groups are respectively provided with 3 bottle openings, namely a first bottle opening, a second bottle opening and a third bottle opening;
the first bottle mouth of each distillation bottle in the distillation bottle group is closest to the transmission body, the second bottle mouth is farthest, the central connecting line of the second bottle mouth of each distillation bottle and the first bottle mouth of each distillation bottle coincides with the rotation axis, the third bottle mouth of each distillation bottle is arranged at the lowest liquid level of the side wall at the bottom of the working position of the distillation bottle, and is mainly used for discharging concentrated solution and also can be used for feeding, and the third bottle mouths of the distillation bottles are connected with a concentrated solution quantitative assembly to realize accurate quantitative control of the concentrated solution;
the first bottleneck of the first distillation flask is in airtight connection with the transmission body, the second bottleneck of the first distillation flask is in airtight connection with the first bottleneck grinding port where the first bottleneck of the second distillation flask is located, and the first bottleneck grinding port is fastened by a clamp;
the second distillation flask is provided with 3 bottle openings, namely a first bottle opening of the second distillation flask, a second bottle opening of the second distillation flask and a third bottle opening of the second distillation flask, wherein the first bottle opening of the second distillation flask is in airtight connection with a second bottle opening grinding opening of the first distillation flask and is fastened by a clamp, and the second bottle opening of the second distillation flask is in airtight connection with a first bottle opening grinding opening of the third distillation flask and is fastened by a clamp;
the first bottleneck of the distillation flask farthest from the transmission body is hermetically connected with the second bottleneck of the distillation flask farthest from the transmission body through a grinding port, and the first bottleneck and the second bottleneck are fastened through a clamp;
the first bottle mouths of the distillation bottle groups from the second distillation bottle to the distillation bottle farthest from the transmission body are positioned at a certain position between the first bottle mouths of the first distillation bottle and the interface of the transmission body and the condenser;
preferably, from the second distillation flask to the distillation flask farthest from the transmission body, the first bottle mouth is positioned at the interface of the transmission body and the condenser;
a bracket is arranged below each distillation flask for supporting, a first bracket is arranged between the first distillation flask and the second distillation flask, and a second bracket is arranged between the second distillation flask and the third distillation flask;
preferably, a spherical structure is arranged on a first bottleneck of the first bottleneck of each distillation flask and is used for anti-explosion boiling;
the concentrated solution quantifying component is a quantifying pipe with quantifying scale marks, and the draining of the concentrated solution and the system sealing are controlled through a second draining valve arranged at one end of the quantifying pipe far away from a third bottleneck of the distillation flask;
a first liquid discharge valve is arranged at the third bottleneck of the distillation flask to control the discharge of the concentrated liquid and seal the distillation flask;
the first liquid discharge valve and the second liquid discharge valve can be made of glass or polytetrafluoroethylene;
the concentrated solution quantifying component and the third bottle mouth of the distillation bottle are in an integrated structure or are in sealed connection with each other through a grinding port and are fixed through a clamp;
a quantitative container is further arranged at one end of the concentrated solution quantifying component, which is far away from the third bottle mouth of the distillation bottle, and is used for realizing disposable capacity-increasing and liquid-containing of concentrated solution;
the quantitative increasing container comprises a plurality of containers with different capacities so as to select and replace according to the capacity requirement of the concentrated solution;
the concentrated solution quantifying component is hermetically connected with the glass grinding port of the quantitative container;
the neck of the quantitative increasing container is provided with an annular receiving disc for Cheng Zhuangding of the solution flowing out of the burette;
each distillation flask in the distillation flask group is heated by a heating component, and the heating component is an electric heating belt arranged at the outer wall of the distillation flask, and preferably the electric heating belt is wound at the outer wall of the distillation flask;
the outer layer of the electric heating belt is provided with a glass fiber belt to realize heat insulation and fixation of the electric heating belt;
and a temperature controller sensor probe is also arranged between the electric heating belt and the distillation flask.
The invention relates to a rotary evaporator capable of accurately quantifying and concentrating a plurality of samples at one time, which is characterized in that an original 1-flask is improved into a flask group comprising at least 2 flasks, the original 1-flask is improved into a flask group comprising 3 flasks (one flask farthest from a transmission body is provided with 2 flasks), each flask is hermetically connected in series with two serial grinding ports and fixed by a clamp, a bracket is arranged below the connection part to ensure that each flask rotates along the same axis, a third flask opening is arranged at the lowest liquid level position of each flask working state, the third flask opening is connected with a concentrate quantifying component, the concentrate quantifying component is provided with a quantifying thin tube, a scale mark is arranged on the quantifying thin tube, a first liquid discharge valve is arranged at one end of the quantifying thin tube close to the flask, a second liquid discharge valve is arranged at one end of the quantifying thin tube far away from the flask, rotary evaporation is started, the second liquid discharge valve is closed (the second liquid discharge valve is opened when a quantifying liquid increasing container is used according to needs), the small change of the concentrate can be intuitively observed, when the concentrate approaches to the designed accurate amount, the rotating speed is slowed down, the concentrate can be stopped when the designed to reach the accurate liquid discharge rate, the required to be measured by the same as the second liquid discharge valve is opened, the accurate liquid discharge valve can be opened immediately according to the same quantitative liquid discharge valve when the two liquid reaches the same quantitative liquid increasing rate, the required to the quality is different than the first liquid measuring performance, and the performance can be measured by the same as a measuring standard, and the concentrate can be measured by the measuring the concentrate by the corresponding to the two containers. Meanwhile, the rotary evaporator provided by the invention uses the electric heating belt to replace the existing water bath pot or oil bath pot as a heating component to heat the distillation flask, and has the advantages that: (1) The steric hindrance is eliminated, the concentrated solution quantitative component and the added distillation flask are convenient to install, (2) the volume of the rotary evaporator is reduced, and the water consumption and the oil consumption for heating in the evaporation process are reduced; (3) Because the distillation flask can realize the direct tapping of concentrate for whole rotary evaporator need not to use operating system, has reduced whole rotary evaporator's subassembly, has practiced thrift the cost.
Drawings
FIG. 1 is a schematic view of a rotary evaporator according to an embodiment of the invention;
FIG. 2 is a schematic view of another connecting structure of a distillation flask of the rotary evaporator according to the embodiment of the present invention;
FIG. 3 is a schematic view of another rotary evaporator and another distillation flask according to the embodiment of the present invention;
FIG. 4 is a schematic view of a third type of distillation flask for a rotary evaporator according to an embodiment of the present invention;
marked in the figure as: 1-bracket, 2-rotating motor, 3-driving body, 4-distillation bottle group (including 41, 42, 43), 5-condenser, 6-collecting bottle, 7-concentrate quantifying component (including 71, 72, 73, 74), 8-clamp, 9-quantitative adding container, 10-electric heating belt, 11-glass fiber belt, 12-temperature sensor, 13-bracket (including 131, 132), 14-annular tray;
41-first distillation flask, 42-second distillation flask, 43-third distillation flask, 71-quantitative scale mark, 72-quantitative tube, 73-first drain valve, 74-second drain valve, 131-first bracket, 132-second bracket;
411-first mouth of first distillation flask, 412-second mouth of first distillation flask, 413-third mouth of first distillation flask, 421-first mouth of second distillation flask, 422-second mouth of second distillation flask, 423-third mouth of second distillation flask, 431-first mouth of third distillation flask, 433-third mouth of third distillation flask;
411' -first neck of first retort, 421' -first neck of second retort, 431' -first neck of third retort.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
The rotary evaporator is modified based on an RE-3000A rotary evaporator produced by Shanghai Asia biochemical instrument factory.
Example 1
Referring to fig. 1, a rotary evaporator for accurately and quantitatively concentrating a plurality of samples at a time according to the present embodiment includes: a support 1, a rotating motor 2 (the rotating evaporator of the invention can also be provided with a control panel for controlling the parameter rotation speed and the heating temperature of the rotating motor, which are not shown in the figure), a control component for controlling the rotation speed and the heating temperature, and the like are fixed on the support 1. The rotary motor 2 drives the distillation flask group 4 to rotate through the transmission body 3, one end of the transmission body 3 is fixedly provided with a detachable distillation flask group 4, the other end of the transmission body is fixedly provided with a detachable condenser 5, the bottom of the condenser is connected with a collecting bottle 6 for collecting fractions, and the top of the condenser 5 is connected with a vacuum pump (not shown in the figure);
the set of distillation flasks 4 comprises 3 distillation flasks: the first distillation flask 41, the second distillation flask 42 and the third distillation flask 43 respectively contain the to-be-concentrated liquid 1, the to-be-concentrated liquid 2 and the to-be-concentrated liquid 3, and the 3 to-be-concentrated liquids can be from the same sample or from different samples. The first distillation flask 41, the second distillation flask 42 and the third distillation flask 43 are sequentially fixed in series, a bracket 13 is arranged between each distillation flask, a first bracket 131 is arranged between the first distillation flask 41 and the second distillation flask 42, a second bracket 132 is arranged between the second distillation flask 42 and the third distillation flask 43, the bracket 13 is used for supporting the distillation flask group 4, the first distillation flask 41, the second distillation flask 42 and the third distillation flask 43 are ensured to rotate along the same axis, a declination included angle is formed between the rotation axis and a horizontal plane, and the declination included angle is a certain degree between 2 and 44, such as 15 degrees.
The first distillation flask 41 is provided with 3 bottle openings, namely a first bottle opening 411 of the first distillation flask, a second bottle opening 412 of the first distillation flask and a third bottle opening 413 of the first distillation flask, wherein the first bottle opening 411 of the first distillation flask is in airtight connection with the transmission body (the connection is the prior art), the second bottle opening 412 of the first distillation flask is in airtight connection with the second distillation flask 42 in a grinding way and is fastened by a clamp 8, and the third bottle opening 413 of the first distillation flask is connected with the concentrated solution quantifying component 7;
the second distillation flask is provided with 3 bottle openings, namely a first bottle opening 421 of the second distillation flask, a second bottle opening 422 of the second distillation flask and a third bottle opening 423 of the second distillation flask, wherein the first bottle opening 421 'of the second distillation flask is in sealed connection with the second bottle opening 412 of the first distillation flask by grinding and fastening by using a clamp 8, the second bottle opening 422 of the second distillation flask is in sealed connection with the first bottle opening 431' of the third distillation flask by grinding and fastening by using the clamp 8, and the third bottle opening 423 of the second distillation flask is connected with the concentrated solution quantifying component 7;
the third distillation flask is provided with 2 bottle openings, namely a first bottle opening 431 of the third distillation flask and a third bottle opening 433 of the third distillation flask, a first bottle opening 431' of the third distillation flask where the first bottle opening 431 is located is in grinding and airtight connection with a second bottle opening 422 of the second distillation flask and is fastened by a clamp 8, and the third bottle opening 433 of the third distillation flask is connected with the concentrated solution quantifying component 7.
In operation of the rotary evaporator of the invention, the length of the first bottleneck 421 'of the second distillation flask and the length of the first bottleneck 431' of the third distillation flask reach the interface of the transmission body 3 and the condenser 5.
As shown in fig. 2, the first bottleneck 411' of the first distillation flask, the first bottleneck 421' of the second distillation flask and the first bottleneck 431' of the third distillation flask are each provided with a spherical structure near the respective distillation flask; the spherical structure not only prevents the concentrate from bumping, but also is convenient for the airtight connection and fixation of the grinding port between the distillation bottles.
The third bottle openings of the first distillation bottle 41, the second distillation bottle 42 and the third distillation bottle 43 are all arranged at the lowest liquid level of the respective working positions and are mainly used for discharging concentrated solution, and the direction of the third bottle opening can be adjusted to be used for feeding; and the third bottle mouth of the distillation bottle is connected with the concentrated solution quantifying component 7, so that the accurate quantitative control of the concentrated solution is realized.
The concentrate dosing assembly 7 and the third bottle mouth of each distillation bottle can be of an integrally formed structure or of a structure which is in airtight connection through ground glass, and are fixed by a clamp 8, and the latter is selected in this example.
The concentrate metering assembly 7 is a metering tube 72 with metering graduation marks 71, and is sealed by a second discharge valve 74 arranged at one end of the metering tube 72 away from the distillation flask for controlling the discharge of concentrate and the distillation system.
A first drain valve 73 is arranged at the third bottleneck of each distillation flask to control the discharge of the concentrated solution and seal the distillation flask.
The first drain valve 73 and the second drain valve 74 may be made of glass or polytetrafluoroethylene.
The position of the concentrate quantifying component far away from the third bottleneck of the distillation flask is also provided with a quantifying container 9 according to the requirement, and the quantifying container is used for realizing disposable capacity and liquid containing of the concentrate.
The quantitative adding container 9 comprises a plurality of containers with different capacities, and the containers are selected and replaced according to the capacity requirement of the concentrated solution.
The concentrate dosing assembly 7 is connected with the dosing and adding container 9 in a glass grinding way in a sealing way and is fixed by a clamp 8 (not shown in the figure).
The neck of the dosing and adding container 9 is provided with an annular receiving disc 14 for Cheng Zhuangding of the solution flowing out. Each distillation flask in the distillation flask group is heated by a heating component, and the heating component is an electric heating belt 10 arranged at the outer wall of the distillation flask, and preferably the electric heating belt is wound at the outer wall of the distillation flask.
The outer layer of the electric heating belt is provided with a glass fiber belt 11 for realizing heat insulation and fixation of the electric heating belt.
A temperature controller sensor probe 12 is also arranged between the electric heating belt and the distillation flask.
The rotary evaporator capable of accurately and quantitatively concentrating a plurality of samples at one time improves the original 1 distillation flask into the distillation flask group 4 of 3 distillation flasks, the distillation flasks are sealed and connected in series in pairs in sequence, and are fixed by the clamp 8, and the connection part is provided with the bracket 13 for supporting, so that 3 to-be-concentrated solutions can be subjected to rotary evaporation at one time, and the rotary evaporator has the advantages of being capable of evaporating and concentrating a plurality of samples at one time by using the parallel evaporator and has large evaporation area and high efficiency. The original distillation flask with only one bottleneck is changed into a distillation flask with 3 bottlenecks (a third distillation flask is provided with 2 bottlenecks), each port can be used for feeding, the third bottleneck is arranged at the lowest liquid level position of each distillation flask working state, the third bottleneck of each distillation flask is provided with a first liquid discharge valve 73 and is connected with a concentrated solution quantitative assembly 7, the concentrated solution quantitative assembly 7 is provided with a quantitative thin tube 72, the quantitative thin tube is provided with a scale mark 71, and one end of the quantitative thin tube, which is far away from the distillation flask, is provided with a second liquid discharge valve 74. In the rotary evaporator of this embodiment, at the beginning of distillation, the second liquid discharge valve 74 is closed (the second liquid discharge valve 74 is opened when the quantitative adding container 9 is used as needed), the first liquid discharge valve 73 is opened so that the negative pressure state in the distillation system is still maintained in the distillation flask, the change of the concentrated liquid amount can be visually observed through the scale on the quantitative thin tube 72 during distillation, the rotation speed is adjusted when the concentrated liquid amount approaches to the designed accurate amount, the rotation is immediately stopped when the concentrated liquid amount reaches to the designed accurate amount, the first liquid discharge valve 73 is quickly closed, the second liquid discharge valve 74 is opened (the second liquid discharge valve 74 is closed when the quantitative adding container 9 is used as needed, and then the second liquid discharge valve is opened after the quantitative adding container 9 is removed), and at this time, the concentrated liquid with a determined amount is discharged for calculating the yield index and also for researching the performance difference of the concentrated liquids of different samples.
The rotary evaporator provided by the invention has the advantages that the electric heating belt is used for replacing the existing water bath pot or oil bath pot as a heating component to heat the distillation flask, and the rotary evaporator has the advantages that: (1) The steric hindrance is eliminated, and the concentrated solution quantifying component 7, the second distillation flask 42 and the third distillation flask 43 are convenient to install; (2) The volume of the rotary evaporator is reduced, and the water consumption and the oil consumption for heating in the evaporation process are also reduced; (3) Because the distillation flask can realize the direct tapping of concentrate for the rotary evaporator need not to use operating system, has reduced the subassembly of rotary evaporator, has practiced thrift the cost.
As shown in fig. 1, the rotary evaporator of the present embodiment is a quantitative tube 72, where the outer wall of the quantitative tube is provided with quantitative graduation marks 71 for reading the amount of the concentrated solution, and as an alternative structure, the quantitative tube 72 of the present embodiment may be a quantifiable tubule with a tubule structure, and the quantifiable capacity is preferably 1-10mL, and the measurement graduation may be accurate to 0.01mL, or even 0.005mL.
As a changeable structure, as shown in fig. 1, the rotary evaporator is further provided with a quantitative increasing container 9 near the second liquid discharge valve 74 of the quantitative tube 72, when the capacity of the quantitative tube 72 cannot meet the requirement of the concentrated liquid capacity, the quantitative capacity of the concentrated liquid can be increased by adding the quantitative increasing container 9, so that the disposable liquid discharge of the required amount of concentrated liquid is realized, errors caused by multiple liquid discharge requiring multiple readings are reduced, and the accurate metering of the concentrated liquid is facilitated. The quantitative increasing container and the quantitative tube are matched through accurate metering, so that the capacity of the quantitative tube 72 is increased. The quantitative adding container 9 in this embodiment includes a plurality of different capacities, so as to perform selective replacement according to the designed capacity of the concentrated solution, for example, the capacity of the quantitative adding container 9 is designed to be a group of a plurality of 1mL, 2mL, 3mL, 5mL, 10mL, 20mL, and the like, and a proper quantitative adding container 9 is selected according to the required concentrated solution capacity to perform one-time accurate liquid discharge of the concentrated solution. The shape of the quantitative adding container 9 can be a bent pipe connecting pipe, a flat bottle structure or a sphere which is suitable according to the distance between the distillation bottle and the operation platform.
In the rotary evaporator structure shown in fig. 1, the heating component is used for performing heating evaporation treatment on the to-be-concentrated liquid in the distillation flask, in this embodiment, the heating component is an electric heating belt wrapped at the outer wall of the distillation flask, the electric heating belt 10 heats and evaporates the to-be-concentrated liquid therein through heat conduction of the wall of the distillation flask, and preferably the electric heating belt is wrapped at the outer wall of the distillation flask in a ring shape so as to ensure uniform heating. Meanwhile, a glass fiber belt 11 is arranged outside the electric heating belt and is used as a heat insulation material and a fixing layer to realize heat insulation and fixing of the electric heating belt, and a temperature controller sensor probe 12 is further arranged between the electric heating belt 10 and the outer wall of the distillation flask to detect heating temperature.
As a changeable structure, as shown in fig. 3, the distillation flask group includes 6 distillation flasks, and the 1 to 6 to-be-concentrated solutions respectively contained in the distillation flask group may be from the same sample or from different samples. The connection mode and the heating mode of the 6 distillation bottles are the same as those of the 3 distillation bottles.
As a convertible structure, the number of the distillation flask included in the distillation flask group may be 2, 4, or 5.
As a configuration that can be changed, each of the distillation flasks of the distillation flask group may have a shape as shown in fig. 3 or a shape as shown in fig. 4. The quality of the upper and lower parts of the rotation axis of the distillation flask body shown in fig. 4 is similar or equivalent.
The foregoing has outlined rather broadly the more detailed description of embodiments of the invention, wherein the principles and embodiments of the invention are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (10)
1. A rotary evaporator for accurately and quantitatively concentrating a plurality of samples at a time, comprising: a bracket (1), wherein a rotating motor (2) is fixed on the bracket (1); the rotary motor (2) drives the distillation flask group (4) to rotate through the transmission body (3), one end of the transmission body (3) is fixedly provided with the detachable distillation flask group (4), the other end of the transmission body is fixedly provided with the detachable condenser (5), and the bottom of the condenser (5) is connected with the collecting bottle (6);
-the set of distillation flasks (4) comprises at least 2 distillation flasks;
each distillation flask of the distillation flask group (4) is sequentially connected in series and rotates along the same axis;
the axis and the horizontal plane have a declination included angle which is a certain degree between 2 and 44;
the distillation bottle group (4) sequentially comprises a first distillation bottle (41), a second distillation bottle (42) and a third distillation bottle (43) from the near to the far according to the distance between the distillation bottle group and the transmission body (3), wherein the distillation bottle farthest from the transmission body (3) is provided with 2 bottle openings, namely a first bottle opening and a third bottle opening, and the other distillation bottles are respectively provided with 3 bottle openings, namely a first bottle opening, a second bottle opening and a third bottle opening;
the first bottle mouth of each distillation bottle in the distillation bottle group (4) is closest to the transmission body (3), the second bottle mouth is farthest, the central connecting line of the second bottle mouth of each distillation bottle and the first bottle mouth coincides with the axis, and the third bottle mouth of each distillation bottle is formed at the lowest liquid level of the working position of the distillation bottle and is connected with the concentrated solution quantifying component (7);
a first bottleneck (411) of the first distillation flask is in airtight connection with the transmission body (3), a second bottleneck (412) of the first distillation flask is in airtight connection with a first bottleneck (421') of the second distillation flask, where the first bottleneck (421) is located, by grinding, and is fastened by a clamp (8);
the second bottleneck (422) of the second distillation flask is in grinding airtight connection with the first bottleneck (431') of the first bottleneck (431) of the third distillation flask, and is fastened by a clamp (8);
the bottleneck of the first bottleneck of the distillation flask farthest from the transmission body (3) is hermetically connected with the second bottleneck of the distillation flask farthest from the transmission body by a grinding port, and the bottleneck is fastened by a clamp (8);
a bracket (13) is arranged below each distillation flask for supporting;
the first bottle mouths of the distillation bottle groups (4) from the second distillation bottle to the distillation bottle farthest from the transmission body (3) are positioned at a certain position between the first bottle mouths of the first distillation bottles and the interface of the transmission body (3) and the condenser (5);
each distillation flask in the distillation flask group is heated through a heating component, and the heating component is an electric heating belt (10) arranged at the outer wall of the distillation flask.
2. The rotary evaporator for accurately and quantitatively concentrating a plurality of samples at a time according to claim 1, wherein a spherical structure is arranged on a first bottleneck of each distillation flask where a first bottleneck is located.
3. The rotary evaporator capable of accurately and quantitatively concentrating a plurality of samples at one time according to claim 1, wherein a glass fiber belt (11) is arranged on the outer layer of the electric heating belt (10) to realize heat insulation and fixation of the electric heating belt (10), and a temperature controller sensor probe (12) is arranged between the electric heating belt (10) and the distillation flask.
4. A rotary evaporator capable of accurately and quantitatively concentrating a plurality of samples at a time according to claim 1, wherein the concentrated solution quantitative component (7) is a quantitative tube (72) with quantitative graduation marks (71), and a second liquid discharge valve (74) is arranged at one end of the quantitative tube (72) far from the distillation flask;
a first liquid discharge valve (73) is arranged at the third bottleneck of each distillation flask;
the first drain valve (73) and the second drain valve (74) are matched to open and close to control the discharge of the concentrated solution and seal the distillation flask.
5. The rotary evaporator for accurately and quantitatively concentrating a plurality of samples at a time according to claim 4, wherein the first drain valve (73) and the second drain valve (74) are made of glass or polytetrafluoroethylene.
6. The rotary evaporator capable of accurately and quantitatively concentrating a plurality of samples at one time according to claim 1, wherein the concentrated solution quantitative component (7) and the third bottle mouth of the distillation bottle are in an integrated structure or are in sealed connection with a grinding port and are fixed through a clamp (8).
7. The rotary evaporator capable of accurately and quantitatively concentrating a plurality of samples at one time according to claim 1, wherein the tail end of the concentrated solution quantitative assembly (7) far away from the third bottleneck of the distillation flask is further provided with a quantitative increasing container (9) for realizing disposable volume increasing and liquid containing of concentrated solution.
8. A rotary evaporator for accurately and quantitatively concentrating a plurality of samples at a time according to claim 7, wherein the quantitative increasing container (9) comprises a plurality of containers with different capacities, and the containers are selectively replaced according to the capacity requirement of the concentrated solution.
9. The rotary evaporator capable of accurately and quantitatively concentrating a plurality of samples at one time according to claim 7, wherein the concentrated solution quantitative component (7) is hermetically connected with a glass grinding port of the quantitative enrichment vessel (9) and is fixed by a clamp (8).
10. A rotary evaporator for accurately and quantitatively concentrating a plurality of samples at a time according to claim 7, wherein the neck of the quantitative container (9) is provided with an annular receiving disc (14).
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910850616.0A CN110404283B (en) | 2019-09-10 | 2019-09-10 | Rotary evaporator capable of accurately and quantitatively concentrating multiple samples at one time |
| EP20863417.0A EP4008418B1 (en) | 2019-09-10 | 2020-09-09 | Rotary evaporator for accurately and quantitatively recovering multiple solvents or concentrating multiple samples at one time |
| PCT/CN2020/114217 WO2021047537A1 (en) | 2019-09-10 | 2020-09-09 | Rotary evaporator for accurately and quantitatively recovering multiple solvents or concentrating multiple samples at one time |
| US17/687,897 US20220184521A1 (en) | 2019-09-10 | 2022-03-07 | Rotary evaporator for accurately and quantitatively recovering multiple solvents or concentrating multiple samples at one time |
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| CN201910850616.0A CN110404283B (en) | 2019-09-10 | 2019-09-10 | Rotary evaporator capable of accurately and quantitatively concentrating multiple samples at one time |
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| CN110404283B true CN110404283B (en) | 2024-03-22 |
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| CN110404282B (en) * | 2019-09-10 | 2024-03-22 | 北京师范大学 | Rotary evaporator capable of accurately and quantitatively recycling multiple solvents at one time |
| WO2021047537A1 (en) * | 2019-09-10 | 2021-03-18 | 北京师范大学 | Rotary evaporator for accurately and quantitatively recovering multiple solvents or concentrating multiple samples at one time |
| CN110478928B (en) * | 2019-09-25 | 2024-04-16 | 北京师范大学 | Multi-rotation-shaft evaporator capable of accurately and quantitatively concentrating multiple samples at one time |
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