Geometrical instruments
Patent
1982-04-27
1984-11-20
McQuade, John
Geometrical instruments
339 92M, 339 40, H01R 13621
Patent
active
044835752
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a device with a plug portion and a socket portion for the detachable connection, particularly of high-voltage transmission lines and of the integrated end of low-voltage control lines, and with a mechanism for fixing the connection to prevent unintentional separation.
BACKGROUND ART
Plug and socket devices of this type are provided, for example, in power lines which serve for the connection of heavy-current load, for example, of strong electric motors in workshops or the like. These devices are known for voltages of up to 500 volts. The coupling can be effected in these cases in such a way that it is secured by means of a kind of bayonet catch. Such a coupling is limited in its application particularly if the coupling is to be intended for connecting lines carrying higher voltages. The couplings then have a comparatively large size and heavy weight and, therefore, are difficult to manipulate.
DISCLOSURE OF INVENTION
It is therefore the object of the invention to provide a solution which simplifies the manipulation of couplings of this type and which particularly makes a device of the above-described type suitable for voltages exceeding 500 volts.
In a device of the above-described type, this object is met in accordance with the invention by constructing the fixing mechanism as a drive element which moves the two portions of the device relative to one another into the coupled or uncoupled positions and locks the portions in the coupled position.
The invention makes it possible to simplify the manipulation of a plug and socket device for high voltages. Particularly, it is no longer necessary to move one of the elements of the device during coupling, i.e., the plug portion or the socket portion; this is quite difficult to do anyhow considering the cable diameters of high-voltage transmission lines.
For a further simplification of the manipulation, a further development of the invention provides that the drive element is arranged in the center of the forces acting on the coupling plug during coupling; in a special embodiment, it may be provided that the drive element is formed by a threaded bolt arranged on one portion of the device and a threaded sleeve which is arranged on the other portion of the device and overlaps the threaded bolt, wherein one of the parts is rotatably mounted in the respective portion of the device in order to effect the coupling or uncoupling movement.
This construction according to the invention makes possible with simple means the application of the coupling forces and of the locking forces desired for maintaining the connection. In addition, by the selection of appropriate thread pitches, a reduction ratio and, thus, a further reduction of the required forces in the drive element can be provided.
In accordance with the invention, it can also be provided that the coupling is equipped with a slide safety mechanism which covers the coupling contacts in the appropriate position and is moved into the open position facilitating the coupling by means of control surfaces on the plug after the two portions of the device have been initially engaged.
In this regard, it can also be provided in accordance with the invention that the control surface is provided on a part of the housing wall which projects beyond the contact pins of the plug and extends in the axial direction of the pins, so that the slide safety mechanism is moved in the open position due to a further relative movement of the portions of the device after this housing wall is engaged in or overlapped over the coupling housing and after the threaded pin is engaged in the threaded sleeve of the drive element.
It has been found advantageous if, as also provided by the invention, during coupling after engagement of the threaded pin with the threaded sleeve, first a grounding pin, then the three-phase plug pins and subsequently the two control pins reach electrically conducting engagement with the coupling. As a result, it is achieved that the grounding pin lags behind the three phases du
REFERENCES:
patent: 2610222 (1952-09-01), Burtt et al.
patent: 2697212 (1954-12-01), Castelli
patent: 3209302 (1965-09-01), Uberbacher
patent: 3222631 (1965-12-01), Cohen
patent: 4140358 (1979-02-01), Marechal
patent: 4179179 (1979-12-01), Lowden
patent: 4284311 (1981-08-01), Forster et al.
Kruger Manfred
Schulte Strathaus Franz E.
F.E. Schulte Strathaus KG
McQuade John
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