DE297294C

DE297294C -

Info

Publication number: DE297294C
Application number: DENDAT297294D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Eiseneinlage.Iron insert.

Es war bisher nicht möglich, dünnwandige Betonrohre mit Eiseneinlage von großer Länge, z.B. von iom und darüber, tadellos herzustellen. Die Rohre zeigten in der Regel poröse, undichte und sogar Stellen, in denen die Betonschicht keinen Zusammenhang hatte. Es kam das daher, daß die Vorrichtungen, welche die Form oder die Formwände während des Füllens in Bewegung setzten, wie Klopf- und Rüttelwerke, viel zu stark wirkten. Dieses Klopfen und Rütteln verträgt die Betonschicht nicht. Es wird dadurch keine überall gleich glatte dichte Wand hergestellt, es findet vielmehr teilweise ein Trennen der Masse statt. Versuche haben ergeben, daß durchaus dichte Wände der Betonrohre dann erzielt werden, wenn der Beton mit Hilfe von Druckluft eingeführt und während der Einführung eine leise Zitterbewegung der Form herbeigeführt wird.It was previously not possible to make thin-walled concrete pipes with a large iron insert Length, e.g. from iom and above, to be made flawlessly. The tubes usually showed porous, leaky and even places where the concrete layer had no connection. It was because the devices holding the mold or the mold walls during of the filling in motion, like the knocking and shaking mechanisms that worked much too strongly. This The concrete layer cannot stand knocking and shaking. It doesn't get anywhere equally smooth, dense wall produced, rather there is a partial separation of the Mass instead. Tests have shown that the walls of the concrete pipes are quite tight can be achieved when the concrete is introduced with the help of compressed air and during the introduction a slight trembling movement of the form is brought about.

Gegenstand der Erfindung ist nun ein Verfahren, dünnwandige Rohre von großer Länge mit engmaschiger Eiseneinlage herzustellen, deren Wände durchaus dicht und ohne jede Fehlstelle sind. Ebenso lassen sich nach dem beanspruchten Verfahren fertige Rohre, z. B. solche aus Eisen oder Blech, mit einem durchaus dichten Betonüberzug versehen.The invention now relates to a method for thin-walled pipes of great length with a close-meshed iron inlay, the walls of which are quite tight and without any Are missing. Likewise, finished pipes, such. B. those made of iron or sheet metal, provided with a thoroughly dense concrete coating.

Eine zur Ausübung ■ des Verfahrens dienende Vorrichtung ist auf der Zeichnung in Fig. ι im Querschnitt, in Fig. 2 im Längsschnitt und teils in Ansicht dargestellt.A device used to carry out the method is shown in the drawing in Fig. Ι in cross section, shown in Fig. 2 in longitudinal section and partly in view.

Zur Aufnahme des Betons dient ein luftdicht verschließbarer Behälter b. Der Behälter ist. der einfacheren Herstellung halber aus mehreren Teilen zusammengebaut, die bei c durch Schrauben miteinander verbunden sind. Die Behälterteile sind mit Ausläufen α versehen, welche in oben an den Formteilen / angebrachte trichterartige Einlaufe e hineinragen, die luftdicht an die Ausläufe α anschließen, wenn die Form gehoben wird. An airtight container b is used to hold the concrete. The container is. Assembled from several parts for ease of manufacture, which are connected to one another by screws at c. The container parts are provided with outlets α which protrude into funnel-like inlets e attached to the top of the molded parts / which adjoin the outlets α in an airtight manner when the mold is lifted.

Die Form f besteht ebenfalls aus einzelnen Teilen, die mit Hilfe von Flanschen ν durch Schrauben miteinander verbunden werden. In den Flanschen ν sind Entwässerungs- und Entlüftungslöcher k angebracht, so daß die bei dem Pressen in der Form befindliche Flüssigkeit und Luft entweichen kann.The shape f also consists of individual parts, which are connected to one another by screws with the help of flanges ν. Drainage and ventilation holes k are provided in the flanges ν so that the liquid and air in the mold during the pressing can escape.

Die Aus- und Einlaufe a, e sind so angeordnet, daß die Flanschen ν und Löcher k oben frei bleiben.The outlets and inlets a, e are arranged so that the flanges ν and holes k remain free at the top.

Die Form / ist auf einem Wagen w angeordnet, auf dem sie mittels einer hydraulischen Hebevorrichtung η gehoben und gesenkt werden kann. Infolgedessen kann sie leicht so unter den Preßbehälter b gefahren und so gehoben werden, daß die Einlaufe der Form dicht über die Ausläufe des Behälters b greifen.The form / is arranged on a carriage w on which it can be raised and lowered by means of a hydraulic lifting device η. As a result, it can easily be moved under the press container b and lifted so that the inlets of the mold grip tightly over the outlets of the container b.

An dem Gestell, das den Behälter b trägt, sind mit Kolben versehene Zylinder h angebracht, die mit einer Leitung für Druckluft in Verbindung stehen, die entsprechend gesteuert wird. Die Kolben oder KolbenstangenOn the frame that supports the container b , cylinders h provided with pistons are attached, which are connected to a line for compressed air which is controlled accordingly. The pistons or piston rods

Claims

are connected by eyes ο to rods s , and to these are attached pushers guided in bushes, which are pressed lightly and quickly successively against the mold wall, on which they constantly rest, when the rod is moved back and forth by the compressed air of relatively low tension . The pusher are in front with inlays d of wood or some other something

ίο provided yielding mass, so that the shocks caused are gentle to. ' that only a trembling movement, but not a shaking movement of the form, is produced. The pistons displaceable in the cylinder h allow the device to be used to manufacture tubes of various widths.

The working procedure is as follows: The mold f is moved by means of the carriage w and the hydraulic lifting device «in such a way that the tight connection with the container b takes place. The prepared concrete mass is placed in the container b and the lid m is closed airtight. Then compressed air is introduced into the press container b and the pulpy mass is pressed into the mold /. When the mold / is filled with the concrete mass and is still under air pressure, the pusher guided in the bushes / are activated. As already mentioned, the slight, rapid successive pressing of the same against the mold wall results in a slight trembling of the latter, which is transferred to the pressurized concrete mass. As a result, the parts of the same are tightly joined together and any cavities that may be present are filled. However, the heavy parts of sand and cement also settle quickly, and the excess water is released and escapes through the openings k at the top of the mold f , through which the air in the mold before the concrete is pressed in also escapes . The openings k are to be kept open before and during pressing.

Due to the trembling movement that occurs as a result of the rapid successive impacts of the tappets the shape and as a result of the simultaneously acting air pressure on the mass, as can be seen from the above, extremely tight, bubble-free and strong pipes made.

P a ten τ claim:

Process for the production of long, thin-walled concrete pipes with close-meshed Iron insert, characterized in that the concrete by compressed air with an overpressure of 6 to 8 atm. in the Mold is pressed into it, and to its complete compression the mold walls by striking the air hammers in slight, trembling movement.

1 sheet of drawings.