CN219595884U

CN219595884U - Vacuum evaporation device

Info

Publication number: CN219595884U
Application number: CN202320478293.9U
Authority: CN
Inventors: 刘颖; 齐贺; 郭佳慧; 刘顺顺; 叶禹彤
Original assignee: Liaoning Vocational College Of Medicine
Current assignee: Liaoning Vocational College Of Medicine
Priority date: 2023-03-14
Filing date: 2023-03-14
Publication date: 2023-08-29
Anticipated expiration: 2033-03-14

Abstract

The vacuum evaporation device sequentially comprises a heating device, a suck-back prevention device, a condensing device and a vacuumizing device; the heating device comprises a magnetic heating stirrer and a heating conical flask, and the magnetic heating stirrer is used for heating and magnetically stirring the to-be-concentrated solution; the anti-suck-back device prevents liquefied solution from being sucked back into the heating conical flask; the condensing device comprises a double-neck bottle, a condensing iron stand and a vertical spherical condensing pipe, wherein the condensing iron stand is used for fixing the spherical condensing pipe above the double-neck bottle; one bottleneck of the double-necked bottle is communicated with the output port of the anti-suck-back device, and the lower part of the spherical condensation pipe is inserted into the other bottleneck of the double-necked bottle; the lower end of the side surface of the spherical condensation pipe is branched into a water inlet, and the upper end is branched into a condensed water outlet; the upper part of the spherical condensation pipe is communicated with an extraction opening of the vacuumizing device. The rotary evaporation is replaced by a magnetic stirring mode, so that the evaporation effect is ensured, and the problem of rotary stop caused by expensive glass consumables and plastic interface clamps is avoided. The device is assembled by common laboratory instruments and consumables, and is simple to assemble.

Description

Vacuum evaporation device

Technical Field

The utility model relates to the field of laboratory evaporation devices, in particular to a vacuum evaporation device.

Background

The rotary evaporator is an evaporating instrument widely applied in laboratories, generally consists of a motor, a distillation bottle, a condensation pipe and the like, continuously distills solvent under the condition of reduced pressure, realizes concentration of a large amount of heat-sensitive liquid solution, and is widely applied to the fields of chemistry, chemical industry, biological medicine and the like.

The rotary evaporator works at high frequency, and under the condition of large liquid amount in the distillation flask, the rotary shaft made of glass is easy to loose and break, so that the sealing performance of the instrument is poor and the equipment is not available. The rotation shaft is expensive, up to 300 yuan/one rotation shaft requires higher consumable material cost, and a period of time is required for waiting for replacement or installation, thus delaying work; on the other hand, the distillation flask and the rotating shaft are fixed by the plastic interface clamp, a part of the distillation flask can be immersed into the water bath kettle in the distillation process, and when the distillation flask rotates, the interface clamp can touch the edge of the water bath kettle to stop rotating.

It is more desirable for users with limited costs to use glass equipment and equipment commonly used in laboratories to assemble a simple vacuum evaporation device.

Disclosure of Invention

The utility model aims to provide a vacuum evaporation device which is convenient to assemble and can concentrate a large amount of liquid in a short time.

In order to achieve the above object, the present utility model provides the following technical solutions:

the vacuum evaporation device sequentially comprises a heating device, a suck-back prevention device, a condensing device and a vacuumizing device;

the heating device comprises a magnetic heating stirrer and a heating conical bottle for containing the liquid to be concentrated, and the magnetic heating stirrer is used for heating and magnetically stirring the liquid to be concentrated;

the anti-suck-back device is used for preventing liquefied solution from being sucked back to the heating conical flask;

the condensing device comprises a double-neck bottle, a condensing iron stand and a vertical spherical condensing pipe, wherein the condensing iron stand is used for fixing the spherical condensing pipe above the double-neck bottle;

one bottleneck of the double-necked bottle is communicated with the output port of the anti-suck-back device, and the lower part of the spherical condensation tube is inserted into the other bottleneck of the double-necked bottle; the lower end of the side surface of the spherical condensation pipe is branched into a water inlet, and the upper end of the spherical condensation pipe is branched into a condensed water outlet;

the upper part of the spherical condensation pipe is communicated with an extraction opening of a vacuum extractor, and the vacuum extractor is used for vacuumizing the vacuum evaporator.

Further, the heating conical flask is sealed by a rubber plug, and two glass droppers are inserted in parallel on the rubber plug;

one of the glass droppers is connected with one end of the latex tube, and the other end of the latex tube is clamped by the water stop clamp after being folded back by an angle;

the other glass dropper is connected with the first rubber tube and communicated with the input port of the anti-suck-back device.

Further, the anti-suck-back device comprises a triangular flask, wherein the triangular flask is sealed by a rubber plug, and two glass droppers are inserted in parallel on the rubber plug;

one of the glass droppers is connected with the first rubber tube, and the other glass dropper is communicated with one bottle opening of the double-neck bottle through the second rubber tube.

Further, the upper part of the spherical condensation pipe is connected with a bent air extraction glass plug and then is communicated with the vacuumizing device through a third rubber pipe.

Further, the vacuumizing device is a circulating water type vacuum pump.

Further, a plurality of the heating conical flasks of different specifications are included, and the heating conical flasks are alternatively placed on a magnetic heating stirrer.

In the technical scheme, the vacuum evaporation device provided by the utility model has the following beneficial effects:

according to the vacuum evaporation device, rotary evaporation is replaced by magnetic stirring, rubber pipes are connected to each part, the evaporation effect is ensured, and meanwhile, the problems of rotation stop caused by the use of expensive glass consumables and plastic interface clamps are avoided; the device is assembled by using instruments and consumables commonly used in laboratories, and has simple assembly and relatively low cost; the vacuum evaporation device is additionally provided with a suck-back prevention function, so that the purity and quality of the concentrated solution are ensured; a large amount of liquid can be concentrated in a short time at a lower temperature. The magnetic heating stirrer shell precisely controls heating temperature, power and stirring speed, is uniform in temperature of heated liquid, and simultaneously selects heating conical flasks of different specifications according to the volume of liquid to be concentrated, so that evaporation area is increased, and concentration of liquid in a short time is realized.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

Fig. 1 is a schematic view of a vacuum evaporation apparatus according to the present disclosure.

Reference numerals:

heating device 1, heating conical flask 11, anti-suck-back device 2, triangular flask 21, condensing device 3, double-neck flask 31, condensing iron stand 32, spherical condensing tube 33, bent air-extracting glass plug 33-1, condensed water outlet 33-3, water inlet 33-2 and circulating water type vacuum pump 4.

Detailed Description

In order to make the technical scheme of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the accompanying drawings.

As shown in fig. 1, a vacuum evaporation device comprises a heating device 1, a suck-back prevention device 2, a condensing device 3 and a vacuumizing device in sequence. The device has the functions of heating the solution to be concentrated, preventing suck-back, condensing and vacuumizing.

Wherein, heating device 1 includes magnetic heating agitator and holds the heating erlenmeyer flask 11 of treating concentrate, and magnetic heating agitator is used for treating concentrate heating and magnetic stirring. The heating device 1 can be used for heating the solution to be concentrated by adjusting the temperature and the rotating speed in the heating conical flask 11 through a magnetic heating stirrer, and the solution is heated uniformly through magnetic stirring, so that the functions of a water bath pot, a motor and a rotating shaft in a common rotary evaporator in the market are replaced. The heating conical flask 11 is sealed by an airtight rubber plug, two holes are formed in the rubber plug, and a glass dropper is inserted into the rubber plug, wherein one glass dropper is connected with the latex tube, is folded back by 180 degrees and clamped by a water stop clamp for controlling air pressure, and the other glass dropper is connected with the first rubber tube to allow solvent vapor to circulate. An iron clamp is arranged on the magnetic heating stirrer to fix the heating conical flask 11.

Preferably, a plurality of heating conical flasks of different sizes are included, the heating conical flasks being alternatively placed on a magnetic heating stirrer. The triangle flasks with different specifications are used for containing the to-be-concentrated solution, the evaporation areas of the to-be-concentrated solution are different, and the evaporation rate is controllable.

Wherein the suck-back prevention means 2 is used to prevent the liquefied solution (organic solvent or water, etc.) from being sucked back into the heating flask 11. The anti-suck-back device is composed of a triangular flask 21 and a matched rubber plug, two holes are formed in the airtight rubber plug, and the two holes are respectively inserted into glass droppers, wherein one glass dropper is connected with a first rubber tube for containing a solution to be concentrated, and the other glass dropper is connected with a second rubber tube.

The condensing device 3 comprises a double-neck bottle 31, a condensing iron stand 32, a vertical spherical condensing pipe 33 and a bent lug or bent air extraction glass plug, wherein the condensing iron stand 32 is used for fixing the spherical condensing pipe 33 above the double-neck bottle 31; one bottleneck of the double-necked bottle 31 is communicated with the output port of the anti-suck-back device 2, namely a second rubber tube, and the lower part of the spherical condensation tube 33 is inserted into the other bottleneck of the double-necked bottle 31; the lower end of the side surface of the spherical condensation pipe 33 is branched into a water inlet 33-2, and the upper end is branched into a condensed water outlet 33-3;

the upper part of the spherical condensation pipe 33 is communicated with an extraction opening of a vacuum extractor, and the vacuum extractor is used for vacuumizing the vacuum evaporator.

The condensing device 3 is fixed by an iron stand, a rubber plug is plugged at the side opening of the double-neck bottle 31, and a hole is punched and connected with a second rubber tube from the suck-back prevention device 2. The spherical condensation pipe 33 is vertical, the lower part is inserted into the other bottleneck of the double-necked bottle 31, the upper part is assembled with a bent air extraction glass plug, the lower end is branched into a tap water inlet, the upper end is branched into a condensed water outlet, and the condensation of the evaporated solvent vapor is realized.

The vacuumizing device comprises a circulating water type vacuum pump, and the vacuumizing effect on the whole system is achieved. The branch port for vacuumizing is connected with the bent air extraction glass plug 33-1 through a third rubber tube.

When in use, (1) all the devices are connected by corresponding rubber pipes, and the spherical condensation pipe is connected with tap water; (2) Placing the solution to be concentrated into a heating conical flask, plugging the heating conical flask by using a rubber plug inserted with two glass droppers, connecting one glass dropper to a double-neck flask through a white rubber tube, connecting the other glass dropper to a latex tube, turning back by 180 degrees, clamping by using a water stop clamp, placing the heating conical flask on a magnetic heating stirrer, and adjusting the temperature and the rotating speed; (3) turning on a circulating water type vacuum pump and vacuumizing; (4) After the liquid is concentrated to the corresponding volume, stopping heating and stirring, opening a water stop clamp, loosening a latex tube, recovering to atmospheric pressure, and taking down a heating conical flask containing the concentrated liquid; and (5) turning off the switches and the power supply of each part.

While certain exemplary embodiments of the present utility model have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the utility model, which is defined by the appended claims.

Claims

1. The vacuum evaporation device is characterized by sequentially comprising a heating device (1), a suck-back prevention device (2), a condensing device (3) and a vacuumizing device;

the heating device (1) comprises a magnetic heating stirrer and a heating conical bottle (11) for containing the liquid to be concentrated, wherein the magnetic heating stirrer is used for heating and magnetically stirring the liquid to be concentrated;

the anti-suck-back device (2) is used for preventing liquefied solution from being sucked back into the heating conical flask (11);

the condensing device (3) comprises a double-neck bottle (31), a condensing iron stand (32) and a vertical spherical condensing pipe (33), wherein the condensing iron stand (32) is used for fixing the spherical condensing pipe (33) above the double-neck bottle (31) and fixing the double-neck bottle (31);

one bottleneck of the double-necked bottle (31) is communicated with the output port of the anti-suck-back device (2), and the lower part of the spherical condensation tube (33) is inserted into the other bottleneck of the double-necked bottle (31); the lower end of the side surface of the spherical condensation pipe (33) is branched into a water inlet (33-2), and the upper end of the spherical condensation pipe is branched into a condensed water outlet (33-3);

the upper part of the spherical condensation pipe (33) is communicated with an extraction opening of a vacuum extractor, and the vacuum extractor is used for vacuumizing the vacuum evaporator.

2. A vacuum evaporation apparatus according to claim 1, wherein said heating conical flask (11) is sealed with a rubber plug on which two glass droppers are inserted side by side;

one glass dropper is connected with one end of the latex tube, and the other end of the latex tube is clamped by a water stop clamp after being folded back by 180 degrees;

the other glass dropper is connected with the first rubber tube and communicated with the input port of the anti-suck-back device (2).

3. A vacuum evaporation device according to claim 2, wherein the anti-suck-back device (2) comprises a triangular flask (21), the triangular flask (21) is sealed by a rubber plug, and two glass droppers are inserted in parallel on the rubber plug;

one glass dropper connected with the triangular bottle (21) is connected with the first rubber tube, and the other glass dropper connected with the triangular bottle (21) is communicated with one bottle opening of the double-neck bottle (31) through the second rubber tube.

4. A vacuum evaporation device according to claim 1, wherein the upper part of the spherical condensation pipe (33) is connected with a bent air extraction glass plug (33-1) and then communicated with the vacuum pumping device through a third rubber pipe.

5. A vacuum evaporation plant according to claim 1, wherein said evacuation means is a circulating water type vacuum pump (4).

6. A vacuum evaporation apparatus according to claim 1, comprising a plurality of said heating conical flasks (11) of different sizes, said heating conical flasks (11) being alternatively placed on a magnetic heating stirrer.