DE902034C - Fastening of hard paper floors in wrapped hard paper tubes, especially for extinguishing chambers - Google Patents
Fastening of hard paper floors in wrapped hard paper tubes, especially for extinguishing chambersInfo
- Publication number
- DE902034C DE902034C DEV1910D DEV0001910D DE902034C DE 902034 C DE902034 C DE 902034C DE V1910 D DEV1910 D DE V1910D DE V0001910 D DEV0001910 D DE V0001910D DE 902034 C DE902034 C DE 902034C
- Authority
- DE
- Germany
- Prior art keywords
- hard paper
- floors
- fastening
- wrapped
- tubes
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
Landscapes
- Storage Of Web-Like Or Filamentary Materials (AREA)
Description
Um Hartpapierböden in Harfpapierrohren, insbesondere für Löschkammern, unter Vermeidung von stromleitenden Armaturen zu befestigen, gibt es verschiedene Verfahren, die jedoch in bezug auf Festigkeit und Einfachheit alle nicht voll befriedigen. So wurde bereits vorgeschlagen, die Befestigung des Bodens durch eine Anzahl am Umfang angeordneter, radial gerichteter Stifte aus Hartpapier oder Hartgewebe vorzunehmen. Die Stifte sind in ihrem Kreisquerschnitt auf Abscheren beansprucht, schwächen die Festigkeit des Rohres durch dessen Durchdringung und bilden, wie die Erfahrung lehrt, den Anlaß zur Spaltbildung im Boden.To make hard paper floors in harp paper tubes, especially for extinguishing chambers, There are various ways to fix them while avoiding electrically conductive fittings Processes which, however, are not all fully satisfactory in terms of strength and simplicity. It has already been proposed to fix the floor by a number on the Make circumferentially arranged, radially directed pins made of hard paper or hard tissue. The pins are stressed to shear in their circular cross-section, which weaken them Strength of the pipe through its penetration and form, as experience shows, the reason for the formation of a gap in the ground.
Erfindungsgemäß ist daher auf der .dem Druck entgegengesetzten Seite des Kammerbodens eine Anzahl Hartpapierstifte kegelförmig zur Längsachse eingetrieben, derart, daß die Stiftlöcher im Boden beginnen und im Rohr endigen. Der Abscherquerschnitt hat hierbei die Form einer langen Ellipse, und das Rohr wird weniger geschwächt, da es nicht mehr durchbohrt ist, und die (Gefahr der Spaltbildung im Boden ist beseitigt. Andererseits ist die radiale Sprengbeanspruchung des Rohres, die aber bisher nicht zu Versagern führte; etwas größer, weshalb es sich empfiehlt; .das Rohr um einen gewissen Betrag über den Boden überstehen zu lassen. Bei gleichen Materialstärken ist die Löschkammer nach her Erfindung druckfester als die bekannte Anordnung. Die Abbildungen dienen zur Erläuterung der Erfindung.' In Abb. i ist :die bisher gebräuchliche Befestigungsart dargestellt, bei der die Befestigung des Bodens b in dem Rohr a durch radial gerichtete Stifte c aus Hartpapier erfolgt. Nach Abb. 2 verlaufen die am Umfang angeordneten Löcher für die Stifte c kegelförmig zur Rohrachse. Sie beginnen im Boden b und endigen im Rohr a. Umdie Sprengbeanspruchung des Rohres herabzusetzen, ist der Boden um den Betrag d innerhalb des Rohres angeordnet.According to the invention, a number of hard paper pins are driven in conically to the longitudinal axis on the side of the chamber bottom opposite the pressure, in such a way that the pin holes begin in the bottom and end in the tube. The shear cross-section here has the shape of a long ellipse, and the pipe is less weakened because it is no longer drilled through, and the (risk of cracking in the ground is eliminated ; Somewhat larger, which is why it is recommended;. Let the pipe protrude a certain amount above the ground. With the same material thicknesses, the extinguishing chamber according to the invention is more pressure-resistant than the known arrangement. The figures serve to explain the invention. 'In Fig. i is: the hitherto common type of fastening is shown, in which the base b is fastened in the tube a by means of radially directed pins c made of hard paper. According to Fig Bottom b and end in pipe A. In order to reduce the explosive stress on the pipe, the bottom is inside the pipe by the amount d arranged.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEV1910D DE902034C (en) | 1944-01-30 | 1944-01-30 | Fastening of hard paper floors in wrapped hard paper tubes, especially for extinguishing chambers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEV1910D DE902034C (en) | 1944-01-30 | 1944-01-30 | Fastening of hard paper floors in wrapped hard paper tubes, especially for extinguishing chambers |
Publications (1)
Publication Number | Publication Date |
---|---|
DE902034C true DE902034C (en) | 1954-01-18 |
Family
ID=7569856
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEV1910D Expired DE902034C (en) | 1944-01-30 | 1944-01-30 | Fastening of hard paper floors in wrapped hard paper tubes, especially for extinguishing chambers |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE902034C (en) |
-
1944
- 1944-01-30 DE DEV1910D patent/DE902034C/en not_active Expired
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