CN110538477A - Rotary evaporator capable of simultaneously monitoring steam temperature in system at multiple positions - Google Patents
Rotary evaporator capable of simultaneously monitoring steam temperature in system at multiple positions Download PDFInfo
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- CN110538477A CN110538477A CN201910714875.0A CN201910714875A CN110538477A CN 110538477 A CN110538477 A CN 110538477A CN 201910714875 A CN201910714875 A CN 201910714875A CN 110538477 A CN110538477 A CN 110538477A
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- 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
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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 monitoring the temperature of steam in a system at multiple points simultaneously. The rotary evaporator capable of simultaneously monitoring the steam temperature in the system at multiple points carries out the real-time monitoring at multiple points on the steam temperature in the rotary evaporator in a mode of simultaneously arranging thermometers in a receiving bottle and an evaporating bottle of the conventional rotary evaporator. According to the rotary evaporator, the temperature of steam at the position of a condenser in an evaporation system can be monitored by arranging a first thermometer in a receiving bottle and extending the first thermometer into a condensation cavity of the condenser; meanwhile, the temperature of the steam in the evaporation bottle can be monitored by inserting the second thermometer into the evaporation bottle from the outside, or by fixing one end of the third thermometer inside the glass shaft of the transmission body and inserting the other end of the third thermometer into the evaporation bottle.
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 monitoring the temperature of steam in a system at multiple points simultaneously.
Background
The rotary evaporator is an extraction experimental device for carrying out reduced pressure distillation and concentration on materials, is a common device in a laboratory, is widely applied to experiments such as scale concentration, drying, extraction and recovery of samples and the like, and is particularly used for quickly distilling a large amount of solvents.
The rotary evaporator commonly used at present generally comprises a vacuum pumping device, a heating device, a condensing device, a rotating device and other components. The principle of the rotary evaporator is mainly that the evaporation bottle is controlled by electronic equipment, the solvent is rotated at a constant speed to form a film at the most suitable rotating speed, the evaporation area is increased, the evaporation flask is in a negative pressure state through a vacuum pump, the evaporation flask is rotated and placed in a water bath kettle or an oil bath kettle to be heated at a constant temperature, the heating temperature is set to be close to the boiling point of the solvent, the solution in the bottle is heated and diffused under the negative pressure to be evaporated, and the rapid evaporation of the solvent is realized.
Domestic current rotatory evaporimeter is with water (oil) bath heating, use the heating temperature of temperature controller control water (oil) bath usually, lead to actual temperature and the heating control temperature who sets for generally to have 1-3 ℃ of error, and then lead to inside actual temperature of whole evaporating system and preset the temperature and can produce great deviation, and because whole evaporating system is in the airtight state of negative pressure when operating condition, also make the inside steam temperature of rotatory evaporating system difficult survey, and then unable accuracy carries out temperature monitoring and control to evaporating system, lead to unable satisfied scientific research, the actual low-cost needs of projects such as chemical industry. The rotary evaporator which adopts a temperature sensor to measure the steam temperature at the lower part of the condenser has been developed abroad, but the rotary evaporator is expensive and not beneficial to popularization, and in view of the influence of the mobility of the steam in the evaporation process, the steam temperatures of different sites of the same distillate to be treated in the evaporation system are different, only the steam temperature of a single site is measured, the accurate measurement and the precise control of the steam temperature in the evaporation process cannot be completely realized, and the rotary evaporator which can simultaneously monitor the steam temperature in the system at multiple sites needs to be developed.
Disclosure of Invention
The invention provides a rotary evaporator capable of simultaneously monitoring the steam temperature in a system at multiple positions, which solves the problem that the conventional rotary evaporator cannot realize low-cost multi-position steam temperature real-time monitoring.
In order to achieve the above object, the present invention provides a rotary evaporator capable of simultaneously monitoring the temperature of steam in a system at multiple locations, comprising:
the device comprises a bracket, a rotary motor, an evaporation bottle, a condenser and a transmission body for communicating the evaporation bottle and the condenser, wherein the bracket is fixedly provided with the rotary motor, the evaporation bottle, the condenser and the transmission body; the rotary motor drives the evaporation bottle detachably fixed with the rotary motor to rotate through the transmission body, and the evaporation bottle is heated by the controlled heating assembly to evaporate and concentrate the distillate to be distilled; condensing steam formed by evaporation through a condenser, and then feeding the steam into a receiving bottle connected with the condenser to finish the collection of fractions;
a thermometer fixing seat used for fixing a first thermometer is arranged in the receiving bottle, a temperature sensing end of the first thermometer extends into a steam area in a condensation cavity of the condenser to realize monitoring of the steam temperature of the system, and one end, far away from the temperature sensing end, of the first thermometer is fixedly connected with the thermometer fixing seat to realize fixing of the first thermometer;
The side wall of the evaporation bottle is provided with an evaporation bottle socket for accommodating a second thermometer to extend into the evaporation bottle, the temperature sensing end of the second thermometer extends into the steam area of the evaporation bottle to monitor the temperature of steam in the evaporation bottle, and the second thermometer and the evaporation bottle socket are sealed through a sealing assembly.
The invention discloses a rotary evaporator capable of simultaneously monitoring steam temperature in a system at multiple sites, which comprises:
the device comprises a bracket, a rotary motor, an evaporation bottle, a condenser and a transmission body for communicating the evaporation bottle and the condenser, wherein the bracket is fixedly provided with the rotary motor, the evaporation bottle, the condenser and the transmission body; the rotary motor drives the evaporation bottle detachably fixed with the rotary motor to rotate through the transmission body, and the evaporation bottle is heated by the controlled heating assembly to evaporate and concentrate the distillate to be distilled; condensing steam formed by evaporation through a condenser, and then feeding the steam into a receiving bottle connected with the condenser to finish the collection of fractions;
a thermometer fixing seat used for fixing a first thermometer is arranged in the receiving bottle, a temperature sensing end of the first thermometer extends into a steam area in a condensation cavity of the condenser to realize monitoring of the steam temperature of the system, and one end, far away from the temperature sensing end, of the first thermometer is fixedly connected with the thermometer fixing seat to realize fixing of the first thermometer;
The temperature-sensing device is characterized in that a glass shaft which is formed by a hollow glass tube and does not rotate along with the rotating motor is arranged in the transmission body, a third thermometer is arranged in the glass shaft, the third thermometer is fixed on the inner wall of the glass shaft through a fixing assembly, and the temperature-sensing end of the third thermometer extends into a steam area part in the evaporation bottle to monitor the temperature of steam in the evaporation bottle.
Preferably, the temperature sensing end of the first thermometer is positioned at the lower part of the condensation cavity near the steam area of the transmission body.
Preferably, a fixing seat inserting hole matched with the outer diameter of the first thermometer is formed in the thermometer fixing seat, and one end, far away from the temperature sensing end, of the first thermometer is inserted into the fixing seat inserting hole and fastened, so that the first thermometer is fixed.
preferably, the size of the thermometer fixing seat is smaller than the inner diameter of the bottle mouth of the receiving bottle.
Preferably, the graduation marks and the numerical marks of the second thermometer are positioned on the outer side of the evaporation bottle.
Preferably, the insertion opening of the evaporation bottle is arranged on an extension line of a connecting line of a center point of the feeding opening of the evaporation bottle and a center point of the evaporation bottle, so that the axis of the second thermometer coincides with the rotation axis of the evaporation bottle.
Preferably, the sealing assembly comprises a sealing base which is circumferentially arranged along the insertion opening of the evaporation bottle and protrudes out of the outer wall of the evaporation bottle, a sealing cover which is sleeved on the outer wall of the second thermometer and can be connected with the sealing base, and a sealing gasket and a sealing ring which are arranged between the sealing base and the sealing cover.
Preferably, the third thermometer is disposed in parallel with the rotation axis of the transmission body.
Preferably, the fixing component comprises a thermometer fixing buckle arranged at the inner wall of the glass shaft and a thermometer connecting buckle matched with the thermometer fixing buckle and arranged at one end, far away from the temperature sensing end, of the third thermometer, the thermometer fixing buckle and the thermometer connecting buckle are connected and fixed, so that the third thermometer is fastened with the inner wall of the glass shaft, and the scale marks and the digital marks of the third thermometer are located in the visible range of one side of the evaporation bottle.
Preferably, the thermometer fixing buckle is an L-shaped, crutch-shaped, match-shaped or 1-shaped connecting piece, and the thermometer connecting buckle is of a circular ring-shaped or hook-shaped structure.
Preferably, the heating component comprises a water bath, an oil bath or an electric heating belt wound at the outer wall of the evaporation bottle along the circumferential direction;
The outer layer of the electric heating belt is provided with a glass fiber belt, the electric heating belt is insulated and fixed, the outer wall of the evaporation flask is provided with a temperature sensor between the electric heating belts, and the outer wall of the evaporation flask is provided with a heating belt fixing buckle for realizing the fixation of the electric heating belt.
Preferably, the thermometer comprises a glass tube thermometer or a liquid crystal digital thermometer.
The rotary evaporator capable of simultaneously monitoring the steam temperature in the system at multiple points is characterized in that on the basis of the structure of the conventional rotary evaporator, thermometers are arranged in a receiving bottle and an evaporation bottle at the same time, so that the steam temperature in the rotary evaporator is monitored at multiple points at multiple times. The rotary evaporator can acquire the steam temperature at a set position in a condensation cavity of an evaporation system at any time by arranging a first thermometer in a receiving bottle and extending a temperature sensing end of the first thermometer into the condensation cavity of the condenser, so that the steam temperature at the position of the condenser in the evaporation system can be monitored; meanwhile, the temperature of the steam in the evaporation bottle is obtained in real time in a mode that a second thermometer is inserted into the evaporation bottle from the outer side, and the temperature of the steam in the evaporation bottle is monitored; or, the temperature of the steam in the evaporation bottle can be obtained in real time by fixing one end of a third thermometer in the glass shaft of the transmission body and inserting the other end of the third thermometer into the evaporation bottle, so that the temperature of the steam in the evaporation bottle can be monitored. In the rotary evaporator, each thermometer does not influence the normal use of the rotary evaporator after being installed, the problem that the temperature of steam in an evaporation system cannot be measured at low cost in the prior art is effectively solved, and the rotary evaporator has the advantages of simplicity and convenience in processing and manufacturing and low cost.
in the rotary evaporator, the scale lines and the digital marks of each thermometer can be positioned at the position with clear visual field, even if a third thermometer is arranged in the rotary evaporator, the glass shaft does not rotate along with the motor, the thermometer does not rotate along with the evaporation bottle, the scale lines and the digital marks of the glass tube thermometer are positioned in the visual range of the transmission body towards one side of the rotary evaporation bottle, the visual field is kept clear under the condition of vacuumizing, and the temperature of steam in the evaporation bottle can be accurately acquired.
The rotary evaporator capable of simultaneously monitoring the steam temperature in the system at multiple points, disclosed by the invention, has the advantages that the selected glass tube thermometer is made of glass materials in the whole body, the corrosion resistance is good, the rotary evaporator is suitable for distillation of various liquids, the processing and the manufacturing are simple and easy, and the cost is low.
the rotary evaporator capable of monitoring the steam temperature in the system at multiple points simultaneously disclosed by the invention further preferably replaces a water (oil) bath with the electric heating belt for heating, so that the rotary evaporator can be used under the water (oil) -free condition, the application range of the rotary evaporator is expanded, and the electric heating belt and the glass fiber belt are wound outside the evaporation bottle, so that the heating area of the evaporation bottle is increased, the heat energy is saved, and the working efficiency is improved.
Drawings
FIG. 1 is a schematic view of the structure of a rotary evaporator described in embodiment 1 of the present invention;
FIG. 2 is a schematic view of the rotary evaporator described in embodiment 2 of the present invention;
the reference numbers in the figures are: 1-bracket, 2-rotating motor, 3-evaporation flask, 4-condenser, 5-receiving flask, 6-electric heating belt, 7-transmission body, 8 a-first thermometer, 8 b-second thermometer, 8 c-third thermometer, 9-temperature sensing end, 10-condensation cavity, 11-thermometer fixing seat, 12-glass shaft, 13-heating belt fixing buckle, 14-thermometer fixing buckle, 15-thermometer connecting buckle, 16-evaporation flask socket and 17-fixing seat socket.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The scheme provided by the invention is described in detail by the specific embodiment below, and the rotary evaporator provided by the invention is modified on the basis of an RE-3000A type rotary evaporator produced by Shanghai Yangrong biochemical instrument factory.
example 1
Referring to the structure shown in fig. 1, the rotary evaporator capable of simultaneously monitoring the temperature of steam in a system at multiple locations according to the present embodiment includes:
A support 1, wherein a rotary motor 2 is fixed on the support 1 (the rotary evaporator of the invention can also be provided with a control panel for controlling the rotating speed and the heating temperature of the rotary motor, a control component for controlling the rotating speed and the heating temperature, and the like, which are not shown in the figure), an evaporation bottle 3 and a condenser 4, and the condenser is also connected with a vacuum pump (not shown in the figure);
The rotary motor 2 drives the evaporation bottle 3 detachably fixed with the rotary motor to rotate through a transmission body 7, a glass shaft 12 which does not rotate along with the rotary motor 2 is arranged on the innermost layer of the transmission body 7, a material to be concentrated is placed in the evaporation bottle 3, and the evaporation and concentration process is completed under the heating of a controlled heating assembly; the steam formed by evaporation flows back and is condensed by the condenser 4, and then enters the receiving bottle 5 connected with the condensing chamber 10, so that the collection of the fraction is completed.
in order to monitor the temperature of the steam in the condensation chamber in the whole evaporation process, in the rotary evaporator of this embodiment, a first thermometer 8a and a thermometer fixing seat 11 for fixing the first thermometer 8a are disposed in the receiving bottle 5, a temperature sensing end 9 of the first thermometer 8a extends into the condensation chamber 10 of the condenser 4 to monitor the temperature of the steam in the system, and one end of the first thermometer 8a, which is far away from the temperature sensing end 9, is fixedly connected to the thermometer fixing seat 11 to fix the first thermometer 8 a.
As a preferable structure, in order to more accurately measure the temperature of the vapor inside the evaporation system, it is preferable that the temperature sensing end 9 of the first thermometer 8a is extended to a lower vapor region of the condensation chamber 10. Furthermore, it is preferable to extend the temperature sensing end 9 of the first thermometer 8a to a steam area located at the lower part of the condensation chamber 10 near the transmission body 7 and avoiding the feeding pipe of the rotary evaporator when in use.
In order to fix the first thermometer 8a and the thermometer fixing seat 10, the rotary evaporator of this embodiment is provided with a fixing seat insertion hole 17 adapted to an outer diameter of the first thermometer 8a on the thermometer fixing seat 11, and when in use, one end of the first thermometer 8a far away from the temperature sensing end 9 is inserted into the fixing seat insertion hole 17 and fastened, so as to fix the first thermometer 8 a. The fastening can be a general insertion or an interference fit, and only the first thermometer 8a is required to be fastened with the thermometer holder 11.
In order to facilitate the thermometer fixing seat 11 to be placed in the receiving bottle 5 and taken out of the receiving bottle 5, the size of the thermometer fixing seat 11 is further set to be smaller than the inner diameter of the bottle mouth of the receiving bottle 5; the thermometer holder 11 may have any shape such as a truncated cone, a quadrangular prism, a quadrangular pyramid, or a pyramid with a hole or a recess. The thermometer holder 11 is made of a material which does not react with the distillate, and may be made of glass, polytetrafluoroethylene, or the like. Alternatively, the thermometer holder 11 may be formed integrally with the receiving bottle 5, as long as the first thermometer 8a can be fixed in the receiving bottle 5.
In the structure shown in fig. 1, in order to realize simultaneous monitoring of multiple points of the steam temperature of the rotary evaporator, the rotary evaporator of the present embodiment is further provided with a second thermometer 8b inside the evaporation flask 3, so as to realize monitoring of the steam temperature inside the evaporation flask 3 in the whole evaporation process. In this embodiment, an evaporation bottle insertion opening 16 for accommodating the second thermometer 8b to extend into the evaporation bottle 3 is formed in a side wall of the evaporation bottle 3 of the rotary evaporator, and one end of a temperature sensing end 9 of the second thermometer 8b extends into the evaporation bottle 3 to monitor the temperature of steam in the evaporation bottle 3; the graduations and numerical markings of the second thermometer 8b are generally located on the outside of the evaporator 3. The second thermometer 8b is a conventional glass thermometer, and the scale lines and the numerical marks are located on the outer side of the evaporation flask 3 (including 1L, 2L and 3L) of the RE-3000A type rotary evaporator produced by Shanghai Yangrong Biochemical apparatus factory. As a preferable configuration, in order to measure the temperature of the steam in the evaporation bottle 3 more accurately, the temperature sensing end 9 of the second thermometer 8b is preferably extended to the steam area of the evaporation bottle 3, and generally, the temperature sensing end 9 is extended to the center point of the evaporation bottle 3.
In order to effectively ensure that the second thermometer 8b does not affect the rotation of the rotary evaporator, in the rotary evaporator of the present embodiment, the evaporator socket 16 is disposed on an extension line connecting a center point of the inlet of the evaporator 3 and a center point of the evaporator 3, and when the second thermometer 8b is inserted into the evaporator 3 along the evaporator socket 16, an axial line of the second thermometer 8b coincides with the rotation axis of the evaporator 3, so that the rotary evaporator with the structure can ensure that the second thermometer 8b is always located on the rotation axis of the evaporator 3 when the evaporator 3 rotates, and does not generate a large-scale rotation movement with the rotation of the evaporator 3, thereby affecting the use of the rotary evaporator.
In order to ensure the airtight state of the evaporation flask 3, the rotary evaporator of the present embodiment further realizes sealing between the second thermometer 8b and the evaporation flask insertion opening 16 by a sealing assembly. In the rotary evaporator of the embodiment, the sealing assembly plays an important role in the structure and the use effect of the whole rotary evaporator. The sealing assembly comprises a sealing base, a sealing cover, a sealing gasket and a sealing ring, wherein the sealing base is arranged along the circumferential direction of the evaporator bottle socket 16 and protrudes out of the outer wall of the evaporator bottle 3, the sealing cover is sleeved on the outer wall of the second thermometer 8b and connected with the sealing base, and the sealing base and the sealing gasket are arranged between the sealing cover and the sealing cover to ensure that the position of the evaporator bottle socket 16 is sealed. The sealing cover, the sealing gasket and the sealing ring are made of heat-resistant materials and do not react with a sample to be distilled, such as polytetrafluoroethylene materials.
in the above-mentioned rotary evaporator solution of the present embodiment, the first thermometer 8a and/or the second thermometer 8b may be a glass tube thermometer or a liquid crystal digital thermometer, which are most commonly used in the prior art. The thermometer can be a glass tube thermometer, the temperature measuring medium of the thermometer is a temperature measuring medium which is easy to observe, and preferably, the temperature measuring medium with bright color (such as red) or obvious luster can be selected. Preferably, the thermometer reticle and the digital mark can be used alternatively in one or more of a plurality of different bright colors, so that the thermometer reticle and the digital mark are convenient to identify and read. Preferably, the thermometer reticle and the digital mark can be embedded in the glass tube, so that the corrosion of corrosive liquid to the reticle and the digital mark is prevented, and the pollution of the reticle and the digital mark material to distillate is also avoided. The thermometer may also be a liquid crystal digital thermometer.
The heating element of the rotary evaporator of this embodiment may be a water (oil) bath as is conventionally used in the art. In order to make the rotary evaporator usable in the water-free state, the heating assembly is designed, in particular, as an electrical heating strip 6 arranged on the outer wall of the evaporator bottle 3, as shown in fig. 1. Electric heating belt 6 along circumference twine in the outer wall department of evaporating flask 3, it is right the concentrated solution of treating in the evaporating flask 3 heats, the outer wall of evaporating flask 3 with establish temperature sensor (not shown in the figure) between electric heating belt 6 to through automatically controlled electric heating belt 6 generates heat. The rotary evaporator is further provided with a plurality of heating belt fixing buckles 13 at the outer wall of the evaporation bottle 3, and the heating belt fixing buckles 13 are arranged along the circumferential direction of the evaporation bottle 3 and are mainly used for fixing the electric heating belt 6.
In the rotary evaporator of the embodiment, the glass fiber tape is further arranged on the outer layer of the electric heating tape 6, so that the electric heating tape 6 is fixed, and meanwhile, the heat insulation and the heat loss prevention are facilitated; and when the temperature measuring device is fixed, a gap between the electric heating belts is ensured, so that the condition that a sample in the evaporation bottle is evaporated is conveniently observed, and the accurate reading of the measured temperature under the condition that the measured temperature is extremely few (the display position of the measured temperature on the thermometer is positioned in the evaporation bottle) is convenient.
When the rotary evaporator is used, the rotary motor 2 drives the evaporation flask 3 to rotate, the electric heating belt 6 heats the distillate to be distilled through the wall of the evaporation flask, and the first thermometer 8a can display the steam temperature in the condensation cavity 10 in real time; the second thermometer 8b can display the temperature of the steam in the evaporation flask 3 in real time. A gap is reserved between the electric heating belts 6, so that on one hand, the evaporation condition of a sample in the evaporation bottle is convenient to observe, on the other hand, the accurate reading of the measured temperature under the condition of few (the display position of the measured temperature on the thermometer is positioned in the evaporation bottle) is convenient, and the rotating speed is not too large during reading; the glass fiber band is arranged outside the electric heating band 6, and can be used for heat insulation and heat loss reduction. This embodiment rotary evaporation appearance is when using, and at the in-process of evaporating flask rotary evaporation, the thermometer can show the steam temperature who produces often, and the experimenter can observe the temperature value of thermometer and obtain steam temperature, and then adjusts the heating temperature of water (oil) bath kettle or heat band as required to make steam temperature reach predetermined temperature value.
In the specific implementation of the rotary evaporator of this embodiment, the first thermometer 8a may be directly fixed to the thermometer fixing seat 11 with a suitable structure and size on the basis of the structure of the existing rotary evaporator, and placed inside the receiving bottle 5, and the temperature sensing end 9 is adjusted to a suitable position in the condensation cavity 10, without modifying other components of the evaporator; and the insertion of the second thermometer only needs to open the hole of the evaporation bottle, so that the transformation process is simple and easy to implement and is convenient to operate.
Example 2
Referring to the structure shown in fig. 2, the rotary evaporator capable of simultaneously monitoring the temperature of steam in the system at multiple locations according to the present embodiment includes:
the rotary evaporator comprises a bracket 1, wherein a rotary motor 2 (the rotary evaporator is also provided with a control panel for controlling the rotating speed and the heating temperature of the rotary motor, a control component for controlling the rotating speed and the heating temperature and the like, which are not shown in the figure), an evaporation bottle 3 and a condenser 4 are fixed on the bracket 1, and the condenser 4 is also connected with a vacuum pump (not shown in the figure);
The rotary motor 2 drives the evaporation bottle 3 detachably fixed with the rotary motor to rotate through a transmission body 7, a glass shaft 12 which does not rotate along with the rotary motor 2 is arranged on the innermost layer of the transmission body 7, a material to be concentrated is placed in the evaporation bottle 3, and the evaporation and concentration process is completed under the heating of a controlled heating assembly; the steam formed by evaporation flows back and is condensed by the condenser 4, and then enters the receiving bottle 5 connected with the condensing chamber 10, so that the collection of the fraction is completed.
In order to monitor the temperature of the steam in the condensation chamber in the whole evaporation process, in the rotary evaporator of this embodiment, a first thermometer 8a and a thermometer fixing seat 11 for fixing the first thermometer 8a are disposed in the receiving bottle 5, a temperature sensing end 9 of the first thermometer 8a extends into the condensation chamber 10 of the condenser 4 to monitor the temperature of the steam in the system, and one end of the first thermometer 8a, which is far away from the temperature sensing end 9, is fixedly connected to the thermometer fixing seat 11 to fix the first thermometer 8 a.
As a preferable structure, in order to more accurately measure the temperature of the vapor inside the evaporation system, it is preferable that the temperature sensing end 9 of the first thermometer 8a is extended to a lower vapor region of the condensation chamber 10. Furthermore, it is preferable to extend the temperature sensing end 9 of the first thermometer 8a to a steam area located at the lower part of the condensation chamber 10 near the transmission body 7 and avoiding the feeding pipe of the rotary evaporator when in use.
In order to fix the first thermometer 8a and the thermometer fixing seat 10, the rotary evaporator of this embodiment is provided with a fixing seat insertion hole 17 adapted to an outer diameter of the first thermometer 8a on the thermometer fixing seat 11, and when in use, one end of the first thermometer 8a far away from the temperature sensing end 9 is inserted into the fixing seat insertion hole 17 and fastened, so as to fix the first thermometer 8 a. The fastening can be a general insertion or an interference fit, and only the first thermometer 8a is required to be fastened with the thermometer holder 11.
in order to facilitate the thermometer fixing seat 11 to be placed in the receiving bottle 5 and taken out of the receiving bottle 5, the size of the thermometer fixing seat 11 is further set to be smaller than the inner diameter of the bottle mouth of the receiving bottle 5; the thermometer holder 11 may have any shape such as a truncated cone, a quadrangular prism, a quadrangular pyramid, or a pyramid with a hole or a recess. The thermometer holder 11 is made of a material which does not react with the distillate, and may be made of glass, polytetrafluoroethylene, or the like. Alternatively, the thermometer holder 11 may be formed integrally with the receiving bottle 5, as long as the first thermometer 8a can be fixed in the receiving bottle 5.
in the structure shown in fig. 2, in order to realize simultaneous monitoring of multiple points of the steam temperature of the rotary evaporator, the rotary evaporator of the present embodiment is further provided with a third thermometer 8c inside the evaporation flask 3, so as to realize monitoring of the steam temperature inside the evaporation flask 3 in the whole evaporation process. In this embodiment, the third thermometer 8c of the rotary evaporator is disposed in the glass shaft 12, the third thermometer 8c is fixedly disposed on the inner wall of the glass shaft 12 through a fixing component, and the temperature sensing end 9 of the third thermometer 8c extends into the evaporation bottle 3 to monitor the temperature of the steam in the evaporation bottle 3.
As a preferable configuration, in order to measure the temperature of the steam in the evaporation bottle 3 more accurately, the temperature sensing end 9 of the third thermometer 8c is preferably extended to the steam area of the evaporation bottle 3, and the temperature sensing end 9 is preferably extended to the central area of the evaporation bottle 3. Preferably, the third thermometer 8c is disposed in parallel with the rotation axis of the transmission body 7.
In order to fix the third thermometer 8c on the inner wall of the glass shaft 12, the fixing component of the rotary evaporator in this embodiment includes a thermometer fixing buckle 14 disposed on the inner wall of the glass shaft 12 and a thermometer connecting buckle 15 adapted to the thermometer fixing buckle and disposed at the end of the third thermometer 8c far away from the temperature sensing end 9, and after the thermometer fixing buckle 14 and the thermometer connecting buckle 15 are connected and fixed, the third thermometer 8c can be fastened on the inner wall of the glass shaft 12 without rotating along with the motor.
as a preferable structure, in the rotary evaporator of this embodiment, the thermometer fixing buckle 14 may be an L-shaped, crutch-shaped, match-shaped or "1" -shaped connecting piece, and the thermometer connecting buckle 15 is designed to be a hook-like structure that is adapted to and can be fixed to the thermometer fixing buckle, such as a circular ring-shaped or hook-shaped structure, and the circular ring-shaped or hook-shaped structure is sleeved on the outer side of the thermometer fixing buckle 14 to fasten the thermometer fixing buckle and the thermometer fixing buckle. The thermometer fixing buckle 14 and the thermometer connecting buckle 15 described in this embodiment are only used to fix the third thermometer 8c to the inner wall of the glass shaft 12, and any manner that can achieve connection therebetween in the art is applicable to the structure and solution of the present invention.
in this embodiment, a plurality of thermometer fixing buckles 14 can be additionally arranged at different positions on the inner wall of the glass shaft 12 of the rotary evaporator, so as to be suitable for fixing third thermometers 8c with different lengths and evaporation bottles with different sizes, the thermometer fixing buckle 14 selected during use is convenient for reading the number of the fixed third thermometers 8c, namely, the thermometer fixing buckle 14 is selected to enable the measured steam temperature to be in the optimal range visible through the evaporation bottles 3 or glass flanges, and the observation of experimenters is facilitated.
In the above-mentioned rotary evaporator solution of this embodiment, the first thermometer 8a and/or the third thermometer 8c may be a glass tube thermometer or a liquid crystal digital thermometer, which are most commonly used in the prior art. The thermometer can be a glass tube thermometer, the temperature measuring medium of the thermometer is a temperature measuring medium which is easy to observe, and preferably, the temperature measuring medium with bright color (such as red) or obvious luster can be selected. Preferably, the thermometer reticle and the digital mark can be used alternatively in one or more of a plurality of different bright colors, so that the thermometer reticle and the digital mark are convenient to identify and read. Preferably, the thermometer reticle and the digital mark can be embedded in the glass tube, so that the corrosion of corrosive liquid to the reticle and the digital mark is prevented, and the pollution of the reticle and the digital mark material to distillate is also avoided. The thermometer may also be a liquid crystal digital thermometer.
The heating element of the rotary evaporator of this embodiment may be a water (oil) bath as is conventionally used in the art. In order to make the rotary evaporator usable in the water-free state, the heating assembly is designed, in particular, as an electrical heating strip 6 arranged on the outer wall of the evaporator bottle 3, as shown in fig. 2. Electric heating belt 6 along circumference twine in the outer wall department of evaporating flask 3, it is right the concentrated solution of treating in the evaporating flask 3 heats, the outer wall of evaporating flask 3 with establish temperature sensor (not shown in the figure) between electric heating belt 6 to through automatically controlled electric heating belt 6 generates heat. The rotary evaporator is further provided with a plurality of heating belt fixing buckles 13 at the outer wall of the evaporation bottle 3, and the heating belt fixing buckles 13 are arranged along the circumferential direction of the evaporation bottle 3 and are mainly used for fixing the electric heating belt 6.
In the rotary evaporator of the embodiment, the glass fiber tape is further arranged on the outer layer of the electric heating tape 6, so that the electric heating tape 6 is fixed, and meanwhile, the heat insulation and the heat loss prevention are facilitated; and guarantee when fixed that keep somewhere the clearance between the electric heating area, the condition that the sample was evaporated in the evaporation flask is conveniently observed on the one hand, on the other hand conveniently reads the accuracy of steam temperature in the evaporation flask.
When the rotary evaporator is used, the rotary motor 2 drives the evaporation flask 3 to rotate, the electric heating belt 6 heats the distillate to be distilled through the wall of the evaporation flask, and the first thermometer 8a can display the steam temperature in the condensation cavity 10 in real time; the third thermometer 8c can display the temperature of the steam in the evaporation bottle 3 in real time, and the reading of the third thermometer 8c is facilitated due to the clear view of the steam area in the evaporation bottle in the vacuum-pumping state. A gap is reserved between the electric heating belts 6, so that on one hand, the condition that a sample in the evaporation bottle is evaporated is conveniently observed, on the other hand, the temperature of steam in the evaporation bottle is conveniently and accurately read, and the rotating speed is not too high during reading; the glass fiber band is arranged outside the electric heating band 6, and can be used for heat insulation and heat loss reduction. When the rotary evaporator is used, the thermometer can display the temperature of generated steam in real time in the rotary evaporation process of the evaporation bottle, and an experimenter can observe the temperature value of the thermometer to obtain the steam temperature, so that the heating temperature of a water (oil) bath kettle or a heating belt can be adjusted as required to enable the steam temperature to reach a preset temperature value.
Such as: an experimenter uses the rotary evaporator to carry out rotary evaporation on a certain distillate, the temperature of a water bath is set to be 40 ℃, the steam temperature displayed by a thermometer temperature sensing bulb in an evaporation bottle at a certain moment is 25.3 ℃, the steam temperature displayed by a thermometer temperature sensing bulb at the position of a condenser condensation cavity close to a glass shaft is 23.8 ℃, the difference is 1.5 ℃, in the evaporation process, the steam temperature displayed by the thermometer temperature sensing bulb in the evaporation bottle changes along with time, particularly the change range of the beginning and the end is large, the steam temperature displayed by the thermometer temperature sensing bulb at the position of the intersection of the condenser condensation cavity and the glass shaft axis is also changed, the change range of the beginning and the end is also large, and the temperature difference is kept constant at about 1.5 ℃ for most of the time in the middle stage. The invention provides the experimenter with the information that the set temperature of the water bath kettle can not provide, and provides abundant and useful information for researching the evaporation process and the properties of the components of the distillate to be distilled.
During specific implementation of the rotary evaporator, the first thermometer 8a can be directly fixed on a thermometer fixing seat 11 with a proper structure and size on the basis of the structure of the conventional rotary evaporator and is arranged in the receiving bottle 5, and the temperature sensing end 9 is adjusted to be at a proper position in the condensation cavity 10 without modifying other parts of the evaporator; and the third thermometer 8c is arranged and inserted, so that the hollow glass shaft can be taken out from the rotating system on the basis of the structure of the existing rotary evaporator, and the selected thermometer fixing buckle is fixed on the inner wall of the hollow glass shaft, and other parts of the evaporator are not required to be modified. The thermometer fixing buckle can be made of glass materials, the manufactured thermometer fixing buckle and the hollow glass shaft are connected and fixed in a hot melting mode, and the improvement process is simple and easy to implement and convenient to operate.
The above embodiments of the present invention are described in detail, and the principle and the implementation of the present invention are explained by applying specific embodiments, and the above description of the embodiments is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A rotary evaporator capable of simultaneously monitoring the temperature of steam in a system at multiple locations, comprising:
the device comprises a support (1), wherein a rotating motor (2), an evaporation bottle (3), a condenser (4) and a transmission body (7) for communicating the evaporation bottle (3) and the condenser (4) are fixed on the support (1); the rotary motor (2) drives the evaporation bottle (3) detachably fixed with the rotary motor to rotate through the transmission body (7), and the evaporation bottle (3) is heated by the controlled heating component to evaporate and concentrate the liquid to be distilled; the steam formed by evaporation enters a receiving bottle (5) connected with the condenser (4) after being condensed by the condenser (4) to finish the collection of fractions;
A thermometer fixing seat (11) used for fixing a first thermometer (8a) is arranged in the receiving bottle (5), a temperature sensing end (9) of the first thermometer (8a) extends into a steam area in a condensation cavity (10) of the condenser (4) to realize monitoring of the steam temperature of the system, and one end, far away from the temperature sensing end (9), of the first thermometer (8a) is fixedly connected with the thermometer fixing seat (11) to realize fixing of the first thermometer (8 a);
The lateral wall department of evaporating bottle (3) is provided with and holds second thermometer (8b) and stretch into evaporating bottle socket (16) inside evaporating bottle (3), temperature sensing end (9) of second thermometer (8b) stretch into reach the regional department of steam of evaporating bottle (3) realizes right the temperature monitoring of steam in evaporating bottle (3), second thermometer (8b) with realize sealing through seal assembly between evaporating bottle socket (16).
2. A rotary evaporator capable of simultaneously monitoring the temperature of steam in a system at multiple locations, comprising:
The device comprises a support (1), wherein a rotating motor (2), an evaporation bottle (3), a condenser (4) and a transmission body (7) for communicating the evaporation bottle (3) and the condenser (4) are fixed on the support (1); the rotary motor (2) drives the evaporation bottle (3) detachably fixed with the rotary motor to rotate through the transmission body (7), and the evaporation bottle (3) is heated by the controlled heating component to evaporate and concentrate the liquid to be distilled; the steam formed by evaporation enters a receiving bottle (5) connected with the condenser (4) after being condensed by the condenser (4) to finish the collection of fractions;
A thermometer fixing seat (11) used for fixing a first thermometer (8a) is arranged in the receiving bottle (5), a temperature sensing end (9) of the first thermometer (8a) extends into a steam area in a condensation cavity (10) of the condenser (4) to realize monitoring of the steam temperature of the system, and one end, far away from the temperature sensing end (9), of the first thermometer (8a) is fixedly connected with the thermometer fixing seat (11) to realize fixing of the first thermometer (8 a);
a glass shaft (12) which is formed by a hollow glass tube and does not rotate along with the rotating motor (2) is arranged in the transmission body (7), a third thermometer (8c) is arranged in the glass shaft (12), the third thermometer (8c) is fixed on the inner wall of the glass shaft (12) through a fixing component, and a temperature sensing end (9) of the third thermometer (8c) extends into a steam area part in the evaporation bottle (3) to realize the monitoring of the temperature of steam in the evaporation bottle (3).
3. A rotary evaporator capable of multi-site simultaneous monitoring of the temperature of steam in a system according to claim 1 or 2, characterized in that the temperature sensing end (9) of the first thermometer (8a) is located at the lower part of the condensation chamber (10) near the steam area of the driving body (7).
4. The rotary evaporator capable of simultaneously monitoring the steam temperature in the system at multiple positions according to any one of claims 1 to 3, wherein a holder insertion hole (17) matched with the outer diameter of the first thermometer (8a) is formed in the thermometer holder (11), and one end, away from the temperature sensing end (9), of the first thermometer (8a) is inserted into the holder insertion hole (17) and fastened, so that the first thermometer (8a) is fixed.
5. A rotary evaporator capable of multi-site simultaneous monitoring of the temperature of steam in a system according to any of claims 1 to 4, characterized in that the graduation marks and numerical indications of the second thermometer (8b) are located on the outside of the evaporator flask (3).
6. A rotary evaporator capable of simultaneously monitoring the temperature of steam in a system at multiple points according to any one of claims 1 to 5, characterized in that the evaporator bottle socket (16) is arranged on an extension line connecting the center point of the inlet of the evaporator bottle (3) and the center point of the evaporator bottle (3) so that the axis of the second thermometer (8b) coincides with the rotation axis of the evaporator bottle (3).
7. the rotary evaporator capable of simultaneously monitoring the temperature of steam in a system at multiple positions according to any one of claims 1 to 6, wherein the sealing assembly comprises a sealing base which is circumferentially arranged along the evaporator bottle socket (16) and protrudes out of the outer wall of the evaporator bottle (3), a sealing cover which is sleeved on the outer wall of the second thermometer (8b) and can be connected with the sealing base, and a sealing gasket and a sealing ring which are arranged between the sealing base and the sealing cover.
8. A rotary evaporator capable of multi-site simultaneous monitoring of the temperature of steam in a system according to any of claims 2 to 7, characterized in that the third thermometer (8c) is arranged parallel to the axis of rotation of the transmission body (7).
9. The rotary evaporator capable of simultaneously monitoring the steam temperature in the system at multiple positions according to any one of claims 2 to 8, wherein the fixing component comprises a thermometer fixing buckle (14) arranged at the inner wall of the glass shaft (12) and a thermometer connecting buckle (15) matched with the thermometer fixing buckle and arranged at one end, away from the temperature sensing end (9), of the third thermometer (8c), the thermometer fixing buckle (14) and the thermometer connecting buckle (15) are fixedly connected, the third thermometer (8c) is fastened with the inner wall of the glass shaft (12), and the scale lines and the digital marks of the third thermometer (8c) are positioned in a visual range at one side of the evaporation bottle.
10. A rotary evaporator capable of simultaneously monitoring the temperature of steam in a system at multiple sites according to any one of claims 1 to 9, characterized in that the heating assembly comprises a water bath, an oil bath, or an electric heating belt (6) wound circumferentially at the outer wall of the evaporation bottle (3);
The outer layer of electric heating area (6) is provided with the glass fiber area, realizes the thermal-insulated and fixed of electric heating area (6), evaporating flask (3) outer wall with establish temperature sensor between electric heating area (6), the outer wall department of evaporating flask (3) is provided with fixed knot (13) of heating area for realize the fixing of electric heating area (6).
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