DE580775C - Elastic and electrically insulating connection of unprocessed pipes - Google Patents

Description

Bifaiiotheek

Bur. ind. Own thorn

IS AUG. 1933

ISSUED ON
JULY 15, 1933

To avoid rollover breaks when on Longer lengths of laid metal pipes, it is necessary to install expansion pieces, in order to deal with the multiple vibrations to which pipes laid in the ground are exposed, Avoid pipe bursts due to earth displacement and the like. Nevertheless, there are burst pipes many times before, and it would be an essential remedy if the rigidly connected pipe strings were shorter and the Pipe connections are sufficiently elastic to allow bending of the pipe strings.

Elastic pipe connections by means of a rubber ring are already known, through which the seal is to be achieved. Such connections show, however still have significant shortcomings.

Are z. B. two pipe ends put together on a rubber hose, so is designed that a self-seal occurs through a lip seal, so there is none Device for tensioning the rubber available, so that no longitudinal forces in the Pipe can be included.

With the previously used metallic connections or ball and socket joints the rubber ring used only creates a seal.

When using outer metallic bodies and also in the segment formation of the Metal rings to achieve even pressure on the rubber sealing ring, If the metal rings or flanges come into contact with the pipe, electrical conduction is easily established will.

The innovation concerns an elastic and electrically insulating connection of untreated Pipe ends by means of a rubber ring provided with a lip seal and held together by a clamping ring, in which the lip seal consists of lobe-like, annular projections on the inner surface of the rubber ring exists, which is in the space between the two The pipe ends protrude and lie against the end faces of the pipes. The lobe-like, ring-shaped extensions can also extend into the inside of the pipe and part of the inner surface of the pipe ends cover.

Figs. 1 and 2 illustrate exemplary embodiments. According to Fig. 1, the pipe ends ο are provided without any special processing at the ends with a rubber ring c enveloping both ends, which is expediently put under tension, which is done by a clamping ring b.

The clamping ring envelops the rubber ring all around to prevent the rubber from being squeezed away impossible to do under heavy pressure. The clamping ring is dimensioned so that it is with the Iron pipe does not come into direct contact. Since for pipes with a large diameter the The clamping ring not only consists of two parts, any number of ring pieces can be used in such cases to be used. The rubber ring is

formed at the point between the two pipe ends in the manner of a lip seal, which means that even when the outer ring is fully relaxed, it is still completely sealed is achieved by the lip seal.

As can be seen from Fig. 1, the lip seal c in the case of thick-walled pipes can be fitted between the end walls of the pipes or, as shown in Fig. 2, be laid inside the pipe.

The innovation therefore shows a connection that, above all, has a greater pulling force can accommodate, as is the case with exposed long pipe runs, such as water pipes for

«5 cabin systems, is required.

The coefficient of friction of rubber on iron is so great that it is not too great Tension of the iron ring just pulling the pipe ends out of the connection

ao is made impossible. Due to the even pressing of the rubber ring, taking into account the high coefficient of friction between rubber and iron can be achieved without making metallic contact forces occurring in the longitudinal direction. Even if there is a slight longitudinal movement in question, the Rubber pulled to the points of higher pressure, which causes a self-locking and the pipe connection fully satisfies the tensile stresses that occur. There the individual pipe ends are no longer rigidly connected to one another, as was the case with the previous one known Fl view connection is common, the thermal expansion of the iron pipes affect only one pipe length, but the expansions are so small that they can be received within the elastic pipe connections, so that the entire pipe strings are to be regarded as completely tension-free. Still it is The connection is so elastic that it can leak due to vibration or breakage Relocation of the soil o. The like. Can not occur because the pipe strings a certain Relocation can easily take part. Since the rubber in the clamping ring is so strongly pretensioned that even when it is bent complete relaxation of any rubber parts of the pipe is not possible, loosening or leaking can also occur the connection does not occur.

Claims (2)

Patent claims: I. Elastic and electrically insulating connection of unprocessed pipe ends by means of one provided with a lip seal and held together by a clamping ring Rubber ring, characterized in that the lip seal consists of flap-like, annular projections on the inner surface of the rubber ring, which protrude into the space between the two pipe ends and lie down against the end faces of the pipes. 2. Elastic and electrically insulating connection of unprocessed pipe ends according to claim 1, characterized in that the tab-like, annular extensions extend into the inside of the pipe and cover part of the inner surface of the pipe ends. 1 sheet of drawings