Pipe joints or couplings – Flexible joint – rigid members – Resilient sleeve type
Patent
1994-12-12
1997-12-30
Arola, Dave W.
Pipe joints or couplings
Flexible joint, rigid members
Resilient sleeve type
285423, 138127, 138174, F16L 2100
Patent
active
057021325
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a pivotal link as a connection piece between two construction parts, whereby at least one construction part is supported rotatable around its horizontal axis.
A device for controlling the through-flow through waste water ducts is known from DE-C-39 22 481. In this connection, one construction part consists of a bow-shaped center section which, on both sides, changes into horizontally ending duct sections. The overall construction part is, in this connection, supported rotatable around its horizontal axis. Said construction part (also called a rotary bow) is rotatable to a height such that the high point of the bottom of the bow is liftable as high as the water level adjacent upstream- Now, rigid (i.e., unmovable) duct sections are present on both sides of said rotary bow, whereby the horizontally ending duct sections of the rotary bow are connected with said rigid duct sections via connection pieces. Said connection pieces are equipped with sliding bearings which, at the same time, have a sealing function. In this way, rotatability of the rotary bow relative to the rigid duct sections is to be assured without possibility for the waste water to exit.
However, such pivotal links consisting of connection pieces and bearings do not satisfy the highest requirements. For example, with torsions of .+-.90 degrees and more, there is the risk of damage to the pivotal link as well as also of breakage of the adjacent construction parts that are connected with said pivotal link. Moreover, such pivotal links require much manufacturing expenditure and they are, therefore, expensive as well. At the same time, such pivotal links are highly susceptible to soiling.
A distinction must be made between the pivot links specified above and elastic tube connectors, which have the function of compensating for assembly inaccuracies, vibrations, changes in length, axial and angular displacements of the connected tubes. Such compensators are in most cases designed as hose-like bodies with embedded strength carriers.
Now, the problem of the invention is to make available for torsionally stressed construction parts a pivotal link that satisfies the highest requirements irrespective of the application purpose, i.e., which, in view of adaptation of the rotary motion and also of efficient sealing, retains its full functionality under long-term stresses even at extreme torsion angles.
The invention is explained in greater detail in the following on exemplified embodiments by reference to the schematic drawings, in which:
FIG. 1 shows a pivotal link with embedded radial rings, whereby the surface structure is substantially wavy;
FIG. 2 shows a pivotal link with embedded radial rings, whereby the surface has crown-shaped elevations;
FIG. 3 shows a pivotal link with rings arranged on the surface, such rings bring disposed within deepenings;
FIG. 4 shows a pivotal link with an integrated diagrammatic representation illustrating the course of the angles .alpha. and .beta. or the embedded, thread-like strength carriers;
FIG. 5 shows a rotary bow, which is connected with the adjacent rigid duct section by means of the pivotal link; and
FIG. 6 shows a rotary bow, which is connected with the adjacent rigid duct section by means of the pivotal link and an additional compensator.
FIG. 1 shows a pivotal link (1) as a hose or hose-shaped body, whereby an embedded strength carrier (4) is present between the hose core (2) and the hose cover (3); said strength carrier is explained in greater detail in connection with FIG. 4. The hose cover has, on the outside, the ribs (5) and the grooves (6), which substantially extend wave-shaped. Now, within the range of the ribs, namely within the hose cover, the embedded rings (7) are present, which are arranged in the radial direction. Said rings, which particularly consist of steel or plastic monofilament, are arranged across the total length of the pivotal link, and, in this connection, have approximately the same spacing Z relative to each other. Said spacing Z usefully amounts to 30 to 10
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Friederich Hans-Werner
Kupczik Gunter
Arola Dave W.
Kupczik Gunter
Phoenix Aktiengesellschaft
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