DE8700554U1 - Heating block with bevelled openings or with opening template with bevelled openings - Google Patents
Heating block with bevelled openings or with opening template with bevelled openingsInfo
- Publication number
- DE8700554U1 DE8700554U1 DE8700554U DE8700554U DE8700554U1 DE 8700554 U1 DE8700554 U1 DE 8700554U1 DE 8700554 U DE8700554 U DE 8700554U DE 8700554 U DE8700554 U DE 8700554U DE 8700554 U1 DE8700554 U1 DE 8700554U1
- Authority
- DE
- Germany
- Prior art keywords
- edge
- bevelled
- openings
- bevel
- bevelled openings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000010438 heat treatment Methods 0.000 title claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 230000029087 digestion Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims 1
- 229910001385 heavy metal Inorganic materials 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L7/00—Heating or cooling apparatus; Heat insulating devices
Landscapes
- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Devices For Use In Laboratory Experiments (AREA)
- Sampling And Sample Adjustment (AREA)
Description
Heizblock mit gefcten Öffnungen oder mit Öffnungsschablone mit gefasten Öffnungen Heating block with chamfered openings or with opening template with chamfered openings
In der DIN-Vorschrift DIN 38 409, Teil 41, "Summarische Wirkungs- und Stoffkenngrößen Gruppe H" Deutsche Einheitsverfahren zur Wasser-, Abwasser- und Schlammuntersuchung, Bestimmung des Chemischen Sauerstoffbedarfs (C5P) im BereichIn the DIN standard DIN 38 409, Part 41, "Summary effect and material characteristics Group H" German standard methods for water, waste water and sludge analysis, determination of the chemical oxygen demand (C5P) in the range
über 15 mg/1 ist unter Punkt 5.6 ausgeführt: :' Nach Aufsetzen des Kühlers wird das Reaktionsgemisch innerhalb von 10 Minuten zum Sieden erhitzt; es muß danach weitere 110 Minuten schwach sieden. Die Temperatur des Reaktionsgemisches muß 148 - 3 0C betragen over 15 mg/l is stated under point 5.6: : ' After putting on the condenser, the reaction mixture is heated to boiling within 10 minutes; it must then boil gently for a further 110 minutes. The temperature of the reaction mixture must be 148 - 3 0 C
Vom gleichen Anmelder wurden auf diesem und ähnlichen Gebieten bereits eine Reihe von Anmeldungen vorgenommen. Die Verfahren und Geräte sind inzwischen im Markt eingeführt und bekannt. Weiterhin werden zu diversen anderen Untersuchungen Heizblöcke gleicher oder ähnlicher Bauart eingesetzt, welche/ebenso mit Glasgefäßen bestückt werden. Die dabei eingesetzten Heizblöcke aus Aluminium weisen präzise Lochbohrungen zur Aufnahme der Aufschlußgefäße auf, welche zehwtelmi1limetergenau gearbeitet sind, damit die Wärmeübertragung zwischen Heizblock und Aufschlußgefäß optimol ist. In zunehmendem Maße werden nun täglich größere Mengen von Proben untersucht, was dazu führt, daß von anfänglich 6-er Blöcken inzwischen auf 12-er, 18-er oder 24-er Blöcke gewechselt wird. Dazu wurden Entnahme- und Beschickungsgestelle entwickelt, um gleichzeitig mehrere oder alle Gemäße einzustellen entnehmen zu können. Dabei entsteht beim Einstellen der Aufschlußgefäße stets das Problem, daß das Einfädeln von 6, 12, 18 oder erst recht von 24 Gefäßen in einen Gefäßblock ein schwieriges Unterfangen darstellt.The same applicant has already filed a number of applications in this and similar areas. The processes and devices have now been introduced to the market and are well known. Heating blocks of the same or similar design are also used for various other tests, which are also equipped with glass vessels. The aluminum heating blocks used have precise holes for holding the decomposition vessels, which are machined to a tenth of a millimeter so that the heat transfer between the heating block and the decomposition vessel is optimal. Larger quantities of samples are now increasingly being tested every day, which means that the initial blocks of 6 are now being changed to blocks of 12, 18 or 24. For this purpose, removal and loading racks have been developed in order to be able to remove several or all samples at the same time. When setting up the digestion vessels, the problem always arises that threading 6, 12, 18 or even 24 vessels into a vessel block is a difficult undertaking.
Darum wurde eine Einfädelungshilfe entwickelt, welche hiermit zum Gebrauchsmusterschutz angemeldet wird. Man muß dazu die präzise Lochbohrung (Zeichnung 1) am oberen Ende erweitern, eine Fase einarbeiten (Zeichnung 2-5). Dies geschieht entweder direkt am neuen Block durch Einfräsen in das Aluminium oder aber statt dessen durch Auflegen einer zusätzlichen Lochscheibe mit solchen gefasten Bohrungen auf den Block (Zeichnung 6); "** vor allem als Nachrüstsatz für bereits im Betrieb befindliche Heizblöcke gedacht ist. Als MaterialFor this reason, a threading aid was developed, which is hereby registered for utility model protection. To do this, the precise hole (drawing 1) must be widened at the upper end and a chamfer must be made (drawings 2-5). This is done either directly on the new block by milling into the aluminum or instead by placing an additional perforated disk with such chamfered holes on the block (drawing 6) ; "** is primarily intended as a retrofit kit for heating blocks already in operation. The material
für diese Lochscheibe wählt'"zweckmäßigerweise ebenfalls Aluminium oder einen hitzebeständigen anderen Werkstoff mit ähnlichem Ausdehnungskoeffizienten wie zum Beispiel PTFE.For this perforated disc, it is also advisable to choose aluminium or another heat-resistant material with a similar coefficient of expansion, such as PTFE.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8700554U DE8700554U1 (en) | 1987-01-13 | 1987-01-13 | Heating block with bevelled openings or with opening template with bevelled openings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8700554U DE8700554U1 (en) | 1987-01-13 | 1987-01-13 | Heating block with bevelled openings or with opening template with bevelled openings |
Publications (1)
Publication Number | Publication Date |
---|---|
DE8700554U1 true DE8700554U1 (en) | 1987-06-19 |
Family
ID=6803599
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8700554U Expired DE8700554U1 (en) | 1987-01-13 | 1987-01-13 | Heating block with bevelled openings or with opening template with bevelled openings |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE8700554U1 (en) |
-
1987
- 1987-01-13 DE DE8700554U patent/DE8700554U1/en not_active Expired
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