JPH08168602A - Cooler for rotary evaporator - Google Patents

Abstract

PURPOSE: To provide a cooler for a rotary evaporator capable of preventing a condensate from returning to a sample flask and reduced in the production cost by integrating the cooler with an adaptor. CONSTITUTION: A disc-shaped liquid receiving plate 11 is arranged under the condensing part 8 provided to the upper part of the cooling pipe 2a of a cooler 2 and above an adaptor part 4 connecting a sample flask so as to provide a specific interval with respect to the inner peripheral surface of the cooling pipe 2a and a condensate is allowed to flow down along the inner surface of the cooling pipe.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooler for a rotary evaporator, and more particularly to a cooler for a rotary evaporator in which a cooler for condensing vapor evaporated in a sample flask is installed vertically.

[0002]

2. Description of the Related Art Rotary evaporators are widely used for the purposes of pretreatment for analysis, recovery of trace components, removal of valuable sample solvent, purification and distillation of samples. This rotary evaporator consists of a sample flask that contains a sample, a cooler that cools and condenses the vapor evaporated in the sample flask, a rotary joint that connects the sample flask and the cooler, an adapter that attaches the cooler, and a cooler. It is composed of a receiving flask for collecting the condensed liquid, a capillary for adding and continuously injecting the sample into the sample flask, and the like.

Such a rotary evaporator is
The sample flask that contains the sample is formed so that it can be easily attached and detached and can be easily washed and sterilized.However, the cooler and adapter are connected with a hose for circulating cooling water and a hose for decompression. In order to maximize the cooling efficiency, the cooler has a cooling part formed in the shape of a double serpentine coil, so it is difficult to attach / detach and wash, and generally when processing different samples. But I try not to do these cleanings.

Therefore, in the case of concentrating or purifying a valuable sample, if the liquid once evaporated from the sample flask and condensed in the cooler returns to the side of the sample flask, it will contaminate the valuable sample and cause an analysis. It will have a great influence on the result, and it will cause a phenomenon that researchers most dislike.

The phenomenon in which the condensate from the cooler returns to the sample flask side occurs because the condensate travels through the capillary and the rotary joint. Therefore, conventionally, the condensate is displaced by shifting the center of the cooler mounting position of the adapter. I tried not to drop it directly on the capillary or rotary joint.

[0006]

However, in this case, because of the structure, it is necessary to separately form the cooler and the adapter, which requires processing man-hours and raises the manufacturing cost. Also, some rotary evaporators
It is possible to attach the cooler to the opposite side, but when it is attached to the opposite side, there is a problem that it is not symmetrical.

Therefore, an object of the present invention is to provide a cooler for a rotary evaporator, which can prevent the condensate from returning to the side of the sample flask and can reduce the manufacturing cost by integrating the cooler and the adapter. I am trying.

[0008]

In order to achieve the above-mentioned object, the cooler for a rotary evaporator according to the present invention comprises:
In the cooler connected to the rotary evaporator, below the condensing part provided above the cooling pipe of the cooler, and above the sample flask connecting part, a predetermined space is provided between the cooling pipe and the inner peripheral surface of the cooling pipe. It is characterized in that the provided disk-shaped liquid receiving plate is arranged.

Further, in the above structure, a vapor rising portion having a vapor passage hole on a side surface is provided at a central portion of the liquid receiving plate, and an upper portion is provided at a portion corresponding to an upper portion of a capillary for injecting a sample into the sample flask. Is characterized by having a swelled liquid guide portion, and the sample flask connection portion is characterized in that a liquid cutting convex edge is provided on the outer periphery of the opening to the cooling pipe. .

[0010]

[Operation] According to the above configuration, the liquid condensed in the condensing section above the cooling pipe drops onto the liquid receiving plate, and then flows down from the outer peripheral edge to the receiving flask along the inner peripheral surface of the cooling pipe. , It is possible to prevent the condensate from dropping on the capillary or rotary joint, and the condensate does not return to the sample flask side. As a result, the cooler and the adapter can be integrated with each other, the manufacturing cost can be reduced, and the cooler can be positioned in the center so that bilateral symmetry can be realized.

In particular, by providing a vapor rising portion having a vapor passage hole on the side surface in the central portion of the liquid receiving plate, the vapor from the sample flask can be uniformly dispersed and raised in the upper condensing portion. Further, by providing the liquid guide portion in the portion corresponding to the upper portion of the capillary, it is possible to more reliably prevent the condensed liquid from falling into the capillary. Further, by providing the liquid-cutting convex edge at the sample flask connecting portion, it is possible to prevent the liquid flowing down the inner surface of the tube from flowing into the sample flask connecting portion and accumulating in the sample flask holding portion.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in more detail based on an embodiment shown in the drawings. FIG. 1 is a sectional front view of a main part showing an embodiment of a cooler for a rotary evaporator according to the present invention, FIG. 2 is a front view showing the entire structure of a rotary evaporator, FIG. 3 is a sectional plan view of a cooler, and FIG. [FIG. 3] is a sectional side view of a main part.

First, the rotary evaporator shown in this embodiment comprises a sample flask 1 for containing a sample and a cooler 2 for cooling and condensing vapor evaporated in the sample flask 1.
A rotary joint 3 for connecting the rotating sample flask 1 and the cooler 2 to each other; an adapter part 4 formed integrally with the cooler 2; a receiving flask 5 for collecting the liquid condensed in the cooler 2; It has a capillary part 6 for additionally and continuously injecting a sample into the flask 1, and these are held so as to be able to move up and down by a holding table 7 having a drive part for rotating the sample flask 1.

In the cooling pipe 2a of the cooler 2 installed in the vertical direction, a cooling water connecting pipe 9 for circulating the cooling water to the condensing section 8 formed in a double serpentine coil shape. , 9 and a pressure reducing connecting pipe 10 for connecting a pressure reducing hose connected to a vacuum pump or the like.

Inside the cooling pipe 2a of the cooler 2, the cooling pipe 2a is provided below the condensing part 8 and above the adapter part 4 which is a sample flask connecting part connected to the sample flask 1. A disk-shaped liquid receiving plate 11 is provided with a predetermined space between the liquid receiving plate 11 and the inner peripheral surface thereof. This liquid receiving plate 11
Is a disk-shaped main body 12, a liquid guide portion 13 provided in one diameter portion of the main body 12, a vapor rising portion 14 provided in the central portion of the main body 12, and the vapor rising portion 14 And a steam circulation hole 15 provided on the side surface of the main body 12, and is fixed to the cooling pipe 2a by fixing members 16 provided at three locations on the outer peripheral portion of the main body 12.

The interval between the outer peripheral edge of the main body 12 and the inner peripheral surface of the cooling pipe 2a is such that the condensate on the main body 12 is cooled by the cooling pipe 2.
It is set so as to be transmitted down to the inner peripheral surface of a and flow downward. If this interval is too wide, the condensate will fall into the liquid receiving plate 1.
1 falls from the outer periphery and cannot obtain a sufficient effect, and if it is too narrow, it causes a disadvantage that the condensate is prevented from flowing down and the condensate is accumulated on the liquid receiving plate 11. A spacing of 4-5 mm is suitable. In addition, although the main body 12 is formed in a flat plate shape in the present embodiment, it may be formed in an umbrella shape in which the outer peripheral portion is inclined downward.

The liquid guide portion 13 has a shape that bulges upward from the main body portion 12 in a saddle shape, and is of a capillary 6a inserted into the sample flask 1 from the capillary portion 6 through the adapter portion 4. It is provided so as to be located above. Therefore, by providing the liquid guide portion 13, the condensed liquid that has dropped onto the liquid receiving plate 11 can be prevented from flowing into the liquid guide portion 13.
Since it flows down from the outer periphery of the main body portion 12 except for, it is possible to reliably prevent the condensed liquid from dropping into the capillary 6a. Further, by providing the weir 13a above the end of the liquid guide portion 13, it is possible to more reliably prevent the liquid from falling.

The vapor rising section 14 is formed in a chimney shape upward from the central portion of the main body section 12. The vapor that evaporates in the sample flask 1 and flows from the adapter section 4 into the lower portion of the cooler 2 is formed. Then, the vapor riser 14 rises, passes through the side vapor circulation holes 15, and rises to the condenser 8 above the cooler 2. By providing the vapor rising portion 14 having the vapor circulation hole 15 on the side surface in this way, the condensate is separated from the capillary 6.
It is possible to prevent the liquid from directly falling into a and to separate the condensate flow and the vapor flow. further,
The amount of vapor that can be dispersed evenly in the condensing part 8 and raised, passes through the center of the coiled condensing part 8 and rises in the pipe, and escapes from the pressure reducing connecting pipe 10 without contacting the condensing part 8. Can be reduced to improve the condensation efficiency.

On the other hand, on the outer periphery of the opening of the adapter portion 4 provided in a state of branching from the lower portion of the cooling pipe 2a, a liquid draining convex edge 4a protruding inside the cooling pipe 2a is provided. The draining convex edge 4a is provided to prevent the condensate flowing down along the inner peripheral surface of the cooling pipe 2a from flowing into the adapter section 4, and is inclined toward the sample flask 1 side. The condensate is prevented from flowing into the adapter portion 4 provided as a result and accumulating between the adapter portion 4 and the rotary joint 3 to deteriorate the vacuum seal. It should be noted that by appropriately designing the shape and inclination angle of the main body 12 of the liquid receiving plate 11 so as to prevent the condensate from flowing down near the adapter part 4, for example, a weir is provided or the opposite side is provided. If it is inclined, the liquid draining convex edge 4a can be omitted.

By forming in this way, the cooler 2
The liquid condensed in the condensing section 8 above the liquid drops onto the liquid receiving plate 11, and then flows down from the outer peripheral edge of the main body 12 excluding the liquid guide section 13 above the capillary along the inner peripheral surface of the cooling pipe 2a. , The condensate flowing down near the opening of the adapter section 4
The liquid draining convex edge 4a prevents the liquid from flowing into the adapter portion 4, and the liquid flows down from the lower end of the cooling pipe 2a into the receiving flask 5.

This eliminates the need to take measures such as shifting the center of the cooler mounting position of the adapter,
Since the adapter part 4 can be formed integrally with the cooler 2, the number of parts and the manufacturing cost can be reduced.

It should be noted that the liquid receiving plate may have a shape capable of preventing the condensed liquid falling from the condensing unit from falling on the capillary or the rotary joint portion. For example, the condensed liquid does not fall on the capillary or the like. A vapor passage hole may be provided in the portion, and a groove or the like for guiding the condensate may be provided in addition to the capillary portion.

[0023]

As described above, in the cooler for a rotary evaporator according to the present invention, since the liquid receiving plate for flowing the condensate along the inner surface of the pipe of the cooler is provided below the condensing part, the condensate is stored in the capillary. It is possible to prevent it from flowing into the sample flask through the or rotary joint.

As a result, valuable samples are prevented from being contaminated, the reliability of analysis and the like can be improved, and
It is possible to simplify the device configuration and reduce the manufacturing cost.

[Brief description of drawings]

FIG. 1 is a sectional front view of a main part showing an embodiment of a cooler for a rotary evaporator of the present invention.

FIG. 2 is a front view showing the overall configuration of a rotary evaporator.

FIG. 3 is a sectional plan view of the cooler.

FIG. 4 is a sectional side view of a main part.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Sample flask, 2 ... Cooler, 2a ... Cooling tube, 3 ... Rotary joint, 4 ... Adapter part, 5 ... Receiving flask, 6 ... Capillary part, 6a ... Capillary, 8 ... Condensing part, 11 ... Liquid receiving plate, 12 ... Main body part, 13 ... Liquid guide part, 14 ... Steam rising part, 15 ... Steam flow hole, 16 ... Fixing member

Claims (3)

[Claims] 1. In a cooler connected to a rotary evaporator, between a condenser part provided above a cooling pipe of the cooler and above a sample flask connecting part, between an inner peripheral surface of the cooling pipe. A cooler for a rotary evaporator, characterized in that a disk-shaped liquid receiving plate provided at a predetermined interval is arranged on the plate. 2. The liquid receiving plate has a vapor rising portion having a vapor passage hole on a side surface in a central portion thereof, and is upwardly provided at a portion corresponding to an upper portion of a capillary for injecting a sample into the sample flask. The cooler for a rotary evaporator according to claim 1, wherein the cooler has a swelled liquid guide portion. 3. The cooler for a rotary evaporator according to claim 1, wherein the sample flask connecting portion is provided with a liquid cutting convex edge on an outer periphery of an opening to a cooling pipe.