DE4140595C2 - Segment heating adapter for heating glass round-bottomed flasks or spherical glass containers on flat heating plates - Google Patents

Description

The invention relates to a segment heating adapter for heating round glass flask or spherical glass containers, as they are in the laboratory on flat heating plates are used.

From DE-GM 18 36 432 are fixed heating troughs for heating Round glass flasks and vessels known in the laboratory.

The disadvantage of fixed heating troughs lies in the rigidity and the unfavorable Heat transfer, since the bowl shape only touches about 1/4 of the glass bulb, so that the round glass flasks do not cool down and contract can shatter.

Another disadvantage is that the trough radius has the greatest tolerance Knife of the glass round bottom flask must be designed, with a minus tolerance the round glass bulb is no longer correctly seated in the recess.

The different heat transfer results in a row to heat different temperatures, heating times and final values in the heating glass round bottom flask. The fixed heating bowl also leads to an increased risk of breakage for the round glass flasks.

From DE-OS 22 29 688 a heater is known, a heating jacket which uses one or more separate adapters for round glass flasks can be.

DE 35 32 243 A1 describes a heater in which the one to be heated Container of a peripheral jacket made of one or more plate elements is surrounded, which are held together by elastic ring bands.

It is the object of the present invention to provide a heating device of glass round-bottomed flasks or spherical glass jars that refer to flat heating plates can be put on, the risk of breakage for the glass vessels when Heating and cooling is largely avoided and a good temperature transmission to the vessel is guaranteed.  

This task is carried out by a segment heating adapter with the characteristics of Claim 1 solved. The sub-claim describes an advantageous Further education.

The temperature transfer is controlled by a trough-shaped segment Heating adapter achieved, which is made of a good heat-conducting material, eg. B. from Aluminum.

The trough-shaped segment heating adapter is on the bottom for the purpose of good Heat absorption from the heating plate worked flat. The top is for glass vessels of a certain size worked up to half of them. To a elastic and optimal fit of the trough-shaped heating adapter reach, this is divided into three or more segments, these seg elements are held together by a circumferential spring.

The segments are centered by an inserted disc in the middle. As a result, the segments are in elastic contact with the round glass bulb is sufficient so that stresses due to expansion or contraction on the Round glass flasks avoided, as well as tolerance deviations of the round glass flasks be compensated. Thus, an optimal heat transfer from the plan heating plate to the glass round bottom flask reached.

The invention will be described in more detail below using an exemplary embodiment wrote.

Show it

Fig. 1 shows the segment-heating adapter in longitudinal section on a round heating plate with a glass to be heated round bottom flask,

Fig. 2 shows the heating adapter segment in longitudinal section AA with circumferential tension spring and loose centering disc,

Fig. 3 shows the segment heating adapter in view X with the possible directions of movement of the segments.

The segment heating adapter 2 is preferably made of a good heat-conducting material, e.g. B. made of aluminum. The underside is flat so that it rests well on a heating plate surface 3 which protrudes above the heating plate housing 4 . In the case of round heating plates, an overflow edge can be useful for centering the segment heating adapter 2 .

The top is made for round glass bulb 1 of a certain shape and size so that it can be used up to half in the trough-shaped segment heating adapter 2 .

The segment heating adapter 2 consists of three or more segments which are held together in a groove by a circumferential tension spring 5 .

In the middle of the segments there is a loosely inserted centering disk 6 , which centers the individual segments; with simultaneous expansion and adaptability of the individual segments to the glass flask to be heated 2 .

The circumferential tension spring 5 and the loosely inserted centering disk 6 lie on one level and thereby enable the segments to be easily moved parallel to a direction of movement 7 to the outside without being twisted.

With this device, a uniform and optimal temperature transfer is achieved by the flexibly fitting segments on the glass round bulb 1 .

Claims (2)

1. Segment heating adapter ( 2 ) for heating round glass pistons ( 1 ) or spherical glass containers on flat heating plates ( 3 ), whereby the segment heating adapter ( 2 ) is divided into three or more segments with a flat bottom, which is flexible and movable with one Circumferential train spring ( 5 ) are held together, the segments upward trough-shaped for correspondingly large round glass flasks ( 1 ) are worked out, so that the round glass flasks ( 1 ) can be inserted up to half in the segment heating adapter ( 2 ), and the individual segments being centered in the middle by a loose centering disc ( 6 ) inserted into a groove. 2. segment heating adapter ( 2 ) according to claim 1, wherein the centering disc ( 6 ) is on the same level as the circumferential tension spring ( 5 ).