EP3322956B1 - Rotary evaporator with device for collecting a condensate - Google Patents

Description

The invention relates to a rotary evaporator with a device for collecting a condensate.

Such a generic rotary evaporator is from DE 35 40 592 A1 known and has a gutter to remove dripping condensate.

Condensates form on the outer areas of equipment, for example on evaporation systems, at relatively high humidity when the ambient temperature is significantly higher than the temperature of the equipment. This leads to condensation of water from the ambient air on the outer areas of the apparatus, which flows down the apparatus and accumulates on laboratory benches or laboratory floors. This is mainly done on coolers, for example reflux coolers in evaporation systems. Furthermore, the formation of condensate on equipment, especially on evaporation systems, leads to problems when removing containers or flasks. In the process, dripping condensate contaminates the contents of the container / flask by dripping into the container. In the following, condensate is always understood to be a condensate that forms on the outer surface of an apparatus due to the moisture in the air.

Solutions for directed draining of condensates on apparatus are known in the prior art. One solution is an elastic plastic part, which is applied in the form of a collar to apparatus, the plastic part having a tapered outer area which is suitable for directed dripping of condensate collected on the plastic part. A collecting beaker can be placed under the tapering outer area on the laboratory bench, for example, which collects the dripping condensate. The disadvantage here is that access to the container / piston is restricted by the position of the collecting container. Furthermore, when removing the container / piston from the apparatus, particular attention must be paid to that condensate that drips from the plastic part does not drip into the container / flask.

The object of the invention is to overcome the disadvantages of the prior art. In particular, it is the object of the invention to ensure a controlled collection and / or discharge of a condensate on a rotary evaporator.

These objects are achieved by the device with the features of independent claim 1.

The invention relates to a rotary evaporator with a device for collecting a condensate, comprising a collecting channel with a bottom area, at least one side wall and a contact surface for bringing it into contact with a condensate-forming element. “Bringing into contact” is understood here and in the following to mean “contacting”. The collecting channel can be placed at least partially circumferentially with the contact surface on the condensate-forming element. In this way a device is made available which catches and collects condensate in the collecting channel. In this way, there is no uncontrolled dripping of the condensate and no contamination of containers / flasks by dripping condensate.

The collecting channel is designed in such a way that it can be placed around a condensate-forming element and is designed to be flexible. In this way, the device can over a thick area, in particular a flange, across a thin area of the condensate forming Elements for the operating state are placed. Here and below, flexible is understood to mean that the device or one or more areas of the device is bendable, stretchable and / or elastic. The device can thus be arranged particularly advantageously around condensate-forming elements and ensure good contact with the condensate-forming element.

The collecting channel can be placed against the counterpart of a condensate-forming element in such a way that the collecting channel at least completely surrounds the element, in particular in the operating state. In this way, condensate which runs down over the entire surface of the condensate-forming element is collected. In the operating state, the collecting channel can rest against the element with a partial area of the contact surface and have an area in which the contact surface is not in contact with the element. In this way, different sizes of the element can be covered by the device.

The device can have an outlet for discharging a collected condensate. The outlet is located on the collecting channel. In this way, the collected condensate can be drained from the collecting channel. Thus, the device is not limited to the volume of the collecting channel for collecting the condensate, but a continuously flowing condensate can be collected and drained off. In this way, large volumes of condensate can be drained off. Continuous operation is thus possible.

Adjacent to the contact surface, a support surface for receiving a counter surface of the condensate-forming element can be arranged. The counter surface is provided, for example, by a flange of a reflux cooler on which the device is arranged.

The outlet can be arranged at the lowest point of the collecting channel, in particular at a lowest point of the floor area. This lowest point is understood to be the lowest point in the operating state of the device, i.e. H. when the device is attached to an apparatus. Alternatively, the outlet can be arranged on the upper edge of the side wall or the contact surface or it can be embedded in the side wall.

The outlet can have a connecting element, in particular a hose connector. In this way, captured condensate can be diverted via the outlet into a discharge system, in particular a hose system, connected downstream via the connecting element, in particular a hose connector. In this way, the collection and discharge capacities can be increased. Furthermore, the condensate can advantageously be drained into a separate collecting container in a controlled manner without causing contamination of work or floor surfaces. The condensate no longer drips off but is drained off in a controlled manner, so that contamination of containers / pistons that are removed from the system is excluded.

The device or one or more areas of the device can be made of elastic material. In particular, these can be made of silicone rubber (Q / MQ), fluorine rubber (FPM), fluorine silicone rubber (FMQ), ethylene-propylene-diene rubber (EPM / EP), polyacrylate elastomer (ACM), epichlorohydrin rubber (ECO / CO), chloroprene rubber (CR), hydrogenated nitrile butadiene rubber (HNBR), nitrile butadiene rubber (NBR), butyl rubber (IIR), polyurethanes (AU, EU), styrene butadiene Rubber (SBR). For example, the plastic, which is sold under the trade name Santoprene ™ 8201-70 by Exxon Mobile Chemical, can be used for manufacture of the device or for one or more areas of the device. By using elastic material, the device can easily be applied or adapted to a condensate-forming element. The device can particularly advantageously be applied to elements of different sizes, with a high degree of tightness between the device and the condensate-forming element being ensured.

The device can be designed in one piece. In this way, the device can be produced simply and inexpensively. The device can also be designed in several parts, for example in the form of an O-ring, which can be positioned on the contact surface of the collecting channel, with a separately manufactured collecting channel.

The device has a second condensate collecting and / or draining part in the form of a second flexible collecting channel. The second condensate-collecting and / or draining part can be arranged at a branch of the condensate-forming element, a second condensate-forming element.

The first collecting channel can be connected to the second condensate-collecting and / or draining part in such a way that the condensate from both parts collects in the first collecting channel. In this way, the condensate formed is drained off particularly easily.

The collecting channel can be closed in the circumferential direction and have a first, in particular circular, recess for receiving a condensate-forming element. This ensures that condensate is collected in a particularly advantageous manner. Here and in the following, a closed collecting channel is understood to mean that the collecting channel runs around the recess and has no beginning and no end.

The recess can have a diameter of 10 to 50.8 mm (0.4 to 2 inches), preferably 19 to 31.75 mm (0.75 to 1.25 inches), particularly preferably 22 mm to 28 mm (0, 9 to 1.1 inches). Most preferably, the recess has a diameter of 25.4 mm (1 inch). In this way, the device can be placed around condensate-forming elements with the aforementioned diameters and can therefore be used advantageously in the laboratory. Due to a flexible design, condensate-forming elements with diameters deviating from these values can also be accommodated.

The second condensate-collecting part can have a second, in particular circular recess with a contact surface for receiving a second condensate-forming element. In this way, the device can be positioned tightly around a corresponding counterpart.

The second recess of the second condensate-collecting part can span a surface which is positioned at an angle of 90 ° to 165 °, preferably 120 °, relative to a surface spanned by the first recess. In this way, the device can be placed around branched glass elements of an apparatus, in particular a rotary evaporator, and collect condensate flowing down. In particular, the device can be placed on a cooler, in particular a reflux cooler, in this way. Due to a flexible design, other angles can also be set without any problems.

The second recess can have a diameter of 25.4 to 50.8 mm (1 to 2 inches), preferably 42 mm (1.65 inches). A flexible configuration means that diameters with different values can also be accepted.

Furthermore, an edge of the second recess can have a support surface for receiving a counter surface. In this way, the device can be optimally positioned on an opposing surface of the condensate-forming element, in particular a flange.

The collecting channel can be an open collecting channel with at least one end area closed on one side. When attaching the collecting channel, the closed end area is preferably placed lower than an open end area.

The device can comprise an outlet for discharging a condensate in the end region of the collecting channel. The outlet is positioned in an end area of the collecting channel which, when used properly, forms the lowest point of the collecting channel. In this way, when used as intended, the condensate collected in the collecting channel flows into the end area, in particular the lowest point, of the collecting channel and can be discharged via the outlet.

The device or one or more areas of the device can be plastically deformable. Plastic deformation is understood here and below to mean that the device or areas of the device retain their shape after the deformation, i.e. the device assumes this deformed shape permanently until the device is deformed again. The device can thus be optimally adapted to a corresponding counterpart depending on the situation or application.

The device or one or more areas of the device can be elastically deformable. Here and below, elastic deformation is understood to mean that the device or areas of the device are deformable and resume or want to assume their original shape that existed before the deformation. If the device is designed to be elastically deformable, it can in particular be designed in a spiral shape. It adapts particularly well to a cylindrical counterpart and can be attached to elements of different sizes or diameters.

The invention also relates to a method for collecting and / or discharging a condensate from a rotary evaporator, with condensate from a condensate-forming element being collected and / or discharged in a collecting channel of the device as explained above. The condensate is formed on the outer surface of an apparatus by the moisture in the air. In this way, a condensate formed on an outer area of a rotary evaporator is simply collected and / or discharged.

Figur 1:

Eine Vorrichtung zum gerichteten Abtropfen von Kondensat aus dem Stand der Technik;

Figur 2:

einen vertikalen Schnitt durch eine Vorrichtung zum Auffangen eines Kondensats;

Figur 3:

eine perspektivische Ansicht einer Vorrichtung von schräg oben, die bei einem erfindungsgemäßen Rotationsverdampfer zum Einsatz kommt;

Figur 4:

eine perspektivische Ansicht der Vorrichtung aus Fig. 3 von schräg unten;

Figur 5:

einen vertikalen Schnitt der Vorrichtung aus Figur 3 und 4;

Figur 6a:

eine weitere Vorrichtung zum Auffangen eines Kondensats, ähnlich einem flexiblen Kurvenlineal;

Figur 6b:

eine weitere Vorrichtung zum Auffangen eines Kondensats, ähnlich einem flexiblen Kurvenlineal, im bestimmungsgemässen Gebrauch;

Figur 7:

eine weitere Vorrichtung zum Auffangen eines Kondensats, ähnlich einem Spiralkabelbinder.

The invention is explained in more detail below with reference to figures and exemplary embodiments. Show it:

Figure 1:

A device for directed draining of condensate from the prior art;

Figure 2:

a vertical section through a device for collecting a condensate;

Figure 3:

a perspective view of a device obliquely from above, which is used in a rotary evaporator according to the invention;

Figure 4:

a perspective view of the device Fig. 3 from diagonally below;

Figure 5:

a vertical section of the device Figures 3 and 4 ;

Figure 6a:

another device for collecting a condensate, similar to a flexible curve ruler;

Figure 6b:

another device for collecting a condensate, similar to a flexible curved ruler, when used as intended;

Figure 7:

Another device for collecting condensate, similar to a spiral cable tie.

The Figure 1 shows a device I for collecting and discharging a condensate from the prior art. The device I is designed as a plastic part with a hem II. The seam II completely surrounds a punched recess III and has a tapering outer area IV. In the operating state, the punched recess III is placed around a condensate-forming element, a condensate being collected at the seam II. The collected condensate drips off over the tapered outer area IV. The dripping condensate is collected, for example, in a collecting cup, not shown here, which is in the Operating state is positioned under the tapered outer area IV. This device is advantageously arranged in an inclined plane so that the tapering area forms the lowest point. However, this is not always easy.

The Figure 2 shows a vertical section through a device 1 according to the invention for collecting a condensate. The device 1 has a collecting channel 2 which comprises a bottom area 3, a side wall 4 and a contact surface 5. The contact surface 5 defines a recess 8. An outlet 6 is arranged in the bottom region 3 of the device 1. In the outlet 6 there is a connecting element 7, via which a collected condensate can be discharged. In the operating state, the contact surface 5 is in contact with a condensate-forming element, for example the lower region of a reflux cooler. A condensate flowing down from the condensate-forming element is collected in the collecting channel 2. The collecting channel 2, which is delimited by the bottom area 3, the side wall 4 and the contact surface 5, has a collecting volume. A collected condensate is discharged via the outlet 6. A discharge system (not shown here), for example a hose, can be connected to the connecting element 7. The device 1 is made of Santoprene ™ 8201-70.

The Figures 3 and 4 show a further device 1 in different views. FIG. 3 shows a perspective view obliquely from above and FIG. 4 shows a perspective view obliquely from below. The device 1 is essentially identical to the device from FIG. 2 and has a collecting channel 2. The collecting channel 2 comprises a bottom area 3, a side wall 4 and a contact surface 5. An outlet 6 is arranged in the bottom area 3 of the device 1. The contact surface 5 defines a recess 8 Collecting channel 2 runs around the recess 8 completely. The recess 8 spans an area which, in the operating state, can be positioned essentially horizontally on a condensate-forming element.

The device 1 of Figures 3 and 4 differs from the device Figure 2 by a further condensate-collecting and / or condensate-draining part, a second recess 9 and a contact surface 10 of the recess 9. The further condensate-collecting and / or draining part has a support surface 11 on the edge of the second recess. In the operating state, the device 1 is positioned by means of the recesses 8 and 9 around two condensate-forming elements or at two positions of a condensate-forming element. Condensate running down on the condensate-forming element (s) is collected via the area of the device which surrounds the recess 9 and passed to the collecting channel 2 and / or collected directly in the collecting channel 2 and discharged via the outlet 6.

The Figure 5 FIG. 11 shows a vertical section of the device from Figures 3 and 4 . The first recess 8 for receiving a condensate-forming element spans an area F1. The recess 9 of the second condensate-collecting part spans a second surface F2. The second surface F2 spanned by the recess 9 is positioned at an angle α of essentially 120 ° relative to the surface F1 spanned by the first recess 8.

The Figures 6a and 6b show a further device 1 made of a plastically deformable material similar to a flexible curved ruler. The device 1 has a collecting channel 2 and an outlet 6. The collecting channel 2 has a bottom area 3, a side wall 4 and a contact surface 5. The device is basically elongated ( Figure 6a ). For the operating state, the device 1 is placed on a condensate-forming element and deformed in such a way that the device 1 rests precisely on the condensate-forming element ( Figure 6b ). The device 1 maintains this shape permanently until the device is deformed again or removed. The device 1 can thus be optimally adapted or adapted to a corresponding counterpart depending on the situation or application. The closed end region, which is positioned lowest in the operating state, comprises an outlet 6. Collected condensate can be discharged via this and, if necessary, discharged in a directed manner with a connected hose.

The Figure 7 shows a further device 1 made of an elastically deformable material, which behaves similarly to a spiral cable tie. The device 1 has a collecting channel 2 and an outlet 6. The collecting channel 2 has a bottom area 3, a side wall 4 and a contact surface 5. The device 1 is designed in a spiral shape. The elastic material is deformable, but resumes its shape prior to deformation or wants to resume the shape that existed before deformation. Due to the elastic properties of the material, the contact surface 5 presses against a corresponding, cylindrical counterpart and so the device adapts particularly advantageously in the operating state. Thus, the device 1 can advantageously be placed on condensate-forming elements of different sizes or diameters. The collecting channel 2 has a length so that the device 1 at least completely surrounds a corresponding counterpart. In this way, condensate, which flows off over the entire surface of the condensate-forming element, is collected and can be closed via the outlet 6 End of the lowest point of the gutter 2 are diverted.

Claims (14)

1. Rotary evaporator with a device (1) for collecting a condensate, wherein the device (1) comprises a flexible collecting channel (2) with a bottom region (3), at least one side wall (4) and a contact surface (5) for contacting a condensate-forming element of the rotary evaporator, wherein the collecting channel (2) is applied at least partially circumferentially with the contact surface (5) against the condensate-forming element of the rotary evaporator, wherein the device comprises a second condensate-collecting and/or condensate-discharging part in the form of a second flexible collecting channel which is arranged on a second condensate-forming element of the rotary evaporator.
2. Rotary evaporator according to claim 1, wherein the collecting channel (2) is applied to the condensate-forming element in such a manner that the collecting channel (2) at least completely encircles the element.
3. Rotary evaporator according to one of claims 1 or 2 comprising an outlet (6) for discharging a collected condensate, wherein the outlet (6) is arranged on the collecting channel (2) .
4. Rotary evaporator according to one of claims 1 to 2, wherein the device (1) or one or more areas of the device (1) are made of elastic material.
5. Rotary evaporator according to one of claims 1 to 4, wherein the device (1) is formed integrally.
6. Rotary evaporator according to one of claims 1 to 5, wherein the collecting channel (2) is closed in the circumferential direction and has a first, in particular circular, recess (8) for receiving the condensate-forming element.
7. Rotary evaporator according to claim 6, whereby the first recess (8) has a diameter of 10 to 50.8 mm, preferably 19 to 31.75 mm, particularly preferably 22 to 28 mm.
8. Rotary evaporator according to one of claims 1 to 7, wherein the second condensate-collecting part has an in particular circular recess (9) with a contact surface (10) for receiving the second condensate-forming element.
9. Rotary evaporator according to claims 6 and 8, wherein the recess (9) of the second condensate collecting part spans a area (F2) which is positioned at an angle (α) of 90 to 165°, preferably 120°, relative to a area (F1) spanned by the first recess.
10. Rotary evaporator according to claim 8 or 9, wherein the recess (9) of the second condensate collecting part has a diameter of 25.4 to 50.8 mm, preferably 42 mm.
11. Rotary evaporator according to one of claims 1 to 5, wherein the collecting channel (2) is an open collecting channel with at least one end region closed on one side.
12. Rotary evaporator according to claim 11, wherein the device has an outlet (6) for discharging a collected condensate in the end region of the collecting channel (2).
13. Rotary evaporator according to claim 11 or 12, wherein the device (1) or one or more regions of the device (1) are plastically and/or elastically deformable.
14. A method for collecting and/or discharging a condensate of a rotary evaporator according to one of claims 1 to 13, wherein condensate of a condensate-forming element of the rotary evaporator is collected and/or discharged in a collecting channel (2) of the device (1).

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