Rotary evaporator

Abstract

A rotary evaporator (1), to which a clamping insert (59) having a sleeve-like base shape is associated for clamping a vapor feed-through, in the form of a glass hollow shaft (8), in the hub (58) of a rotational drive (57). The clamping insert (2) includes clamping sections (K1, K2) which are spaced apart in the longitudinal direction and carry each at least one clamping slope (63, 64) which is beveled relative to the longitudinal axis of the clamping insert (59). The beveled clamping inclines interact with the associated counter inclines (65, 66) of the rotational drive (57) such that the clamping sections (K1, K2) are pressed against the glass hollow shaft (8) when axial pressure of the clamping insert (59) is applied. In one embodiment of the invention, the clamping insert (59) has supporting webs (60) which are oriented in the longitudinal direction thereof, the supporting webs being connected to each other via connecting webs (61, 62) which are oriented in a circumferential direction of the clamping insert (59). The connecting webs (61, 62) alternately connect to each other the web end regions of adjacent supporting webs (60), which are arranged either on the one or the other side of the clamping insert (59). The supporting webs (60) and the connecting webs (61, 62) are connected to form the sleeve-like base shape of the clamping insert (59) such that the spaced apart clamping sections (K1, K2) are formed by the connecting webs (61, 62) which are provided at the opposite ends of the clamping insert (59) and support the clamping inclines (63, 64). In another embodiment of the invention, the sealing ring (76) is designed as an annular disk, wherein the outer annular zone (78) of the annular disk is provided as a clamping edge, the annular disk has an inner annular zone (79) which is folded or angled in the longitudinal direction of the glass hollow shaft (8), and the sealing ring (76) bears sealingly against the glass hollow shaft (8) with a partial region (T) of the annular disk, this partial region being oriented in the longitudinal direction of the glass hollow shaft (8).

Description

technical field [0001] The invention relates to a rotary evaporator comprising a rotary drive with a hub and a holding insert with a sleeve-like basic shape for clamping in the hub of the rotary drive a vapor guiding device formed as a glass hollow shaft. part, wherein the clamping insert has two clamping sections spaced apart from each other in the longitudinal direction, each clamping section has at least one clamping bevel inclined relative to the longitudinal axis of the clamping insert, each clamping The arrangement of the holding bevel with the rotary drive means that the counter bevel of the holding bevel interacts in such a way that the holding sections are pressed against the glass hollow shaft by the axial pressure loading of the holding insert, holding the insert There are supporting webs directed in the longitudinal direction of the clamping insert, the supporting webs are connected to each other by connecting webs directed in the circumferential direction of the c...

AI Technical Summary

Problems solved by technology

However, if the connecting webs that connect the supporting webs to each other also have to be pushed onto the glass hollow shaft, further advancement of the clamping insert becomes difficult because the connecting webs and the supporting webs The adjoining area of ​​the preset circular contour with the same diameter

Since the clamping bevels are present at the opposite web ends of the support webs, a clamping lock between the glass hollow shaft and the clamping insert can only be achieved in a partial region of the circumference of the clamping insert, whereas A clamping lock between the glass hollow shaft and the clamping insert is not possible in the area of ​​the connecting web

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