Note: Descriptions are shown in the official language in which they were submitted.
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The invention relates to a metal-enclosed pressurized
gas-insulated high-voltage power station whose conductors or appa-
ratus are accommodated in housings in which the conductors extend
essentially in the direction of the longitudinal axis of the hous-
ing and in which the longitudinal axes of the housings to be con-
nected together are at an angle to one another and are connected
by means of a two-part adapter, whereby the housings are respec-
tively connected to the adapter via flanges and fasteners pene-
trating these flanges.
Such a metal-enclosed high-voltage power station can
comprise apparatus and/or tubular conductors combined in switch-
board sections of a specific field circuit and respectively accom-
modated in housings filled with pressurized gas, particularly with
SF6. It is thereby usual that the apparatus in the housings
filled with pressurized gas forming part of the switchboard sec-
tions be accommodated in a confined space, e.g. in buildings,
whereas transformers or open-wire circuits, which can also form
part of the high-voltage power station, are often located outdoors
and have connaction~ spaced substantially farther apart. Gas-
filled tubular conductors are often used for the connections. It
is therefore necessary that the housings be connected to one an-
other with their longitudinal axes extending at an angle to each
other. At connecting points to one another the tubular conductors
can also be at an angle between 0 to 90 between the longitudinal
axes of their housings or conductors.
So as not to have to provide corresponding specially
adapted housings for such break points, it is known from German
Utility Model 72 33 316 to connect the housings and conductors
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aligned at an angle to each other by means of a two-part adapter
which i~ fastened with the aid of flanges to the housings to be
connected together, e.g. of the field circuit and/or the tubular
conductor. The known two-part adapter consists of two spherical
segments, which are welded together and form the enclosure, as the
housing in which the conductors are connected to one another in
the centre of the spheres. During original installation this
known adapter allows easy adaptation to the angle~ given between
the conductors to be connected. After welding, however, this
specific angle of the adapter cannot be altered.
It is the aim of the present invention to design a two-
part adapter for connecting angularly aligned housings of a metal-
enclosed pressurized gas-insulated high-voltage power station in
- such a way that the adapter can be easily adapted to the angle,
can be easily disassembled at any time and can again be adapted to
another angle between 0- and 90-.
To solve this problem a metal-enclosed pressurized gas-
insulated high-voltage power station of the kind named at the
beginning is de~igned ln accordance with the invention such that
two ringa abutting at the end face and sealed in gas-tight manner
- against each other and against the flangeg serve as the adapter.
These rings each have tapped holes or throughholes on an inner
and an outer reference circle and each is fastened by means of fas-
teners to a flange of the housing on the inner reference circle.
and the rings are connected together by means of additional fas-
teners on the outer reference circles that are each t.he same
; diameter, whereby the diameter of the outer reference circles is
~' ` 80 much larger than the outer diameter of the flanges that the
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additional fa~teners lie out~ide the flanges. Qn one of the
ring~ the bores on the outer reference circle are designed as
elongated holes, the length of which corresponds to half the hole
spacing ~a2 on this outer reference circle.
The housings of the high-voltage power station with lon-
gitudinal axes or conductors extending at an angle to each other
are thus connected via the normal flanges of the housings by
simply inserting two rings abutting one another at the end face,
these rings being connected to the flange~ of the housing on the
inner reference circles and to one another on the outer reference
circle~.
On one of the two rings the boreg for receiving the ad-
ditional fastener for connecting the rings together are designed
as elongated holes. The length of these elongated holes cor-
responds to half the hole spacing ~a2 of the elongated holes.
The area remaining between the elongated holes is thus the same
length as the elongated holes and 18 covered by shifting the
ring with the elongated holes.
It is recommended that half the hole spacing ~a2 be
selected for the hole spacing ~al on the outer reference
circle of the other ring. In this way one of the bores on the
other ring can alway~ be aligned with the elongated hole over the
entire area of displacement.
Since bores are likewise provided on the inner reference
circle of the rings, these bore~ being identical in diameter and
hole spacing to the bores on the flanges of the hou~ings that are
to be connected together even though their longitudinal axes are
at an angle ~ to each other, any angle ~ between + 90 can be set
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by twisting the two rings of the adapter against each other. The
diameter and hole spacings or the reference circle on the flange
and the associated inner reference circle on the rings of the
adapter to be connected to thi~ flange can thereby be selected
completely independently of the conditions on the outer reference
circle of the rings. Therefore, guaranteeing the gas tightness of
the connection by appropriately selecting the hole spacing on the
inner reference circle causes no difficulties. The gas seals can
thereby be attached in any manner to one of the two end faces of
the rings.
Furthermore, the hole ~pacing ~a2 of the elongated
holes on the outer reference circle of one of the rings can be ad-
vantageously selected in such a way that they can be added up to
180. In this case the gas seals are to be arranged only on the
two end faces of the ring with the elongated hole~. The possibil-
ity then exists of turning this ring with the elongated hole~ over
a diameter that respectively forms the axis of symmetry. Then, in
the folded position, i.e. turned 180, of the ring the elongated
holes are respectively arranged mirror-inverted to the original
position and this ring with elongated holes can be connected to a
ring that has only half the number of bores on the outer reference
circle, i.e. in which the hole spacing on the outer reference
circle corresponds to the hole spacing ~a2 of the elongated
holes.
'; The outer diameter of the two ring~ of the adapter can
vary. The larger ring can then be utilized to attach additional
fastenings, e.g. for fastening a support. The outer diameter of
the flanges can also vary if the inner reference circles of the
associated rings are adapted accordingly.
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The flanges to which the two-part adapter is connected
can be situated either on the end face or on the surface of the
housings, depending on the plane in which the angle between the
longitudinal axes of the housings to be connected together lies.
A particularly simple embodiment results if the flanges of the
housings each have the same number of bores on the inner reference
circle as if they were to be directly connected to one another.
Both rings then have the same inner reference circle with the same
number of bores.
Contaminants or moisture can be advantageously prevented
from entering via the elongated holes by covering the elongated
holes on the outer reference circle of the one ring with an addi-
tional ring provided with bores corresponding to the hole spacing
and the diameter of the bores on the outer reference circle of the
other ring of the adapter.
The invention, which can be used both for single-phase
and multi-phase enclosed installations and tubular conductors,
will be described in greater detail herebelow on the basis of the
exemplary embodiments illustrated in Figures 1 to 6 of the draw-
ings.
Figure 1 shows, in schematic illustration, three single-
phase enclosed housings of a switchboard section which are con-
nected via tubular conductors with connections spaced far apart of
an installation part not illustrated. Figure 2 illustrates on an
enlarged scale a partially cut side view of Figure 1. Figures 3
and 5 each show a longitudinal section through the housing flanges
with the adapter which is illustrated in two slightly modified em-
bodiments. Figures 4 and 6 schematically illustrate, each in
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0xpanded view, the reference circles on the flanges and the adapt-
er with different variations for arranging the bores or elongated
holes.
In a single-phase metal-enclosed high-voltage power sta-
tion insulated with SF6 pressurized gas the conductors 2, accom-
modated in three housings 1 arranged closely together (see Figure
1), belonging to a field circuit of a switchboard section of the
high-voltage power station and running parallel to each other in
the direction of the longitudinal axes 3 of the housings 1 indi-
; cated by dot-dash lines, are connected to open-wire circuit con-
nections that are not illustrated and which are a substantially
greater distance apart. In each case the connection occurs via
single-phase tubular conductors 4 whose conductors 5, which lie in
the centre, likewise run in the direction of the longitudlnal axes
6 of the housings 7 indicated by dot-dash lines. Due to the great
distances between the open-wire circult connections compared to
~ the distances between the housings 1, the conductors 2 in the
gl, housing 1 and the conductors 5 of the tubular conductors 4 are
each at an angle to each other, whereby this angle ~ i8 in each
case dlfferent.
; As can be seen from the side view illustrated in Figure
2 of one of the interconnected housings 1 of the switchboard sec-
tion and the housing 7 of the tubular conductor 4, the connection
occurs with the aid of a two-part adapter 8 which is fastened to
the flange 9 of the housing 1 and to the flange 10 of the housing
7 of the tubular conductor 4. The flange 9 of the hou~ing 1 is
~ located on a connecting piece 11 which i9 guided out of the hous-
- ing 1 at right angles to its surface. The flange 10 similarly
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seals a connecting piece 12 of the housing 7. These connecting
pieces 11 or 12, which are respectively guided at right angles out
of the housings 1 or 7, are connected together by means of the
two-part adapter 8 in such a way that the desired angle ~ results
between the longitudinal axis 3 of the housing 1 and the longitu-
dinal axis 6 of the housing 7. The conductor 2 in the housing 1
therefore ends in a sphere 13 and the conductor 5 of the tubular
conductor 4 ends in a sphere 14. A connecting conductor 15, which
is at right angles to the conductors 2 and 5 and which penetrates
the connecting pieces 11, 12 as well as the adapter 8 in the
centre, is located between the two spheres 13, 14.
Both flanges 9, 10 have bores 17, 18 of the same hole
spacing ~16 lying on the same reference circle 16 (indicated
in Figure 3). Since these reference circles 16 are also of the
same diameter, the bores 17, 18 in the flanges 9, 10 are produced
as if they were directly connected together by the fasteners.
However, they are connected via the two-part adapter 8.
This two-part adapter 8 consists of two rings 19, 20, of
which ring 19 is connected to flange 9 and ring 20 is connected to
flange 10. For this purpose both rings 19, 20 have bores 22, 23
lying on an inner reference circle 21 (indicated in Figure 3)
which corresponds to reference circle 16, the diameter and hole
spacing ~i being identical to the diameter of the bores 17, 18
and the hole spacing ~16. The hole spacings ~ 16
are determined in accordance with the required gas tightness of
the flanges 9, 10.
Screws 24, which penetrate the throughhole 23 of the
ring 19 and are screwed into the threaded bore 17 of flange 9, are
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used aR the fastener between the flange 9 and the ring 19. The
head 25 of screw 24 lies in a counterbore 26 of bore 23 which
originates with the inner end face 27 of ring 19. The other ring
20 is fastened to the flange 10 by screws 28 which are ~crewed
into the threaded bores 22 and whose head 29 is supported on the
outer end face 30 of the flange 10. The advantage of this
arrangement is that the screws 24 and 28 have the same dimensions.
Both rings 19, 20 of the adapter 8 are also connected to
one another. For this purpose bores 32, 33, lying on the same
outer reference circle 31 (likewise indicated) and penetrated by
bolts 34 serving as additional fasteners, are provided in both
rings 19, 20. The nut 35 of the bolt 34 abuts the outer end face
36 of the ring 19.
By comparison, an additional ring 38, which lies between
the end face 37 and the head 39 of the bolt 34, is provided on the
opposite outer end face 37 of the rlng 20. For it~ part this ring
38 contains bores 40 whose diameter and hole spacing corresponds
to that of the outer bores 33. The ring 38 serve~ to cover the
bore~ 32 in ring 20 that are designed a~ elongated hole~ 32 80
that they are protected against the ingre~s of contaminants and
moisture.
The ga~ tightness of the two rings 19, 20 of the adapter
8 against one another i9 established ~y a sealing ring 41 arranged
on the inner end face 27 of the ring 19. A further sealing ring
42 i~ arranged on the outer end face 37 of the ring 20 and thus
seals the ring 20 vis-~-vis the flange 10.
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To achieve the angular adjustability of the connection
between two housings 1 and 7 in accordance with any angle + ~ be-
tween the longitudinal axes 3 and 6 which should lie between 0 to
90, the following conditions on the two-part adapter 8 are adher-
ed to:
A hole spacing ~a2~ which can be added up to 360 or
180, is selected on the ring 20 whose bores 32 on the outer ref-
erence circle 31 are designed as elongated holes 32. The length
of the elongated holes 32 then corresponds to half the hole spac-
ing ~a2. On the other ring 19 of the adapter 8 a hole spacing
is selected for the bores 33 on the outer reference circle 31
which corresponds to half the hole spacing ~a2 of the elongat-
ed holes 32 of the other ring 20. This selection must naturally
be made in such a way that the distances between the individual
bores 33 are sufficiently small in order to guarantee the gas
tightness if only every second bore 33 is covered with the fasten-
er 34.
On account of this relationship both between the length
of the elongated ho1es 32 and between the hole spacings ~a2 f
the elongated holes and the hole spacing ~a2/2 of the bores
33 on the other ring 19, complete displaceability of each elongat-
ed hole 32 over an area of at least one hole spacing of the bores
33 is given. In this area one bore 33 is thus always covered with
the elongated hole 32 (see Figure 4). Thus, the hole spacing ~i
on the inner reference circles 21 of the rings 19, 20 can be se-
lected completely freely, whereby only the gas tightness must be
taken into consideration. This hole spacing ~i of the bores 23
and 22 corresponds then to the hole spacings ~16 on the
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reference circles 16 of flange g or 10 with which one of the rings
19, 20 i9 respectively connected.
If a specific angle ~ between the longitudinal axis 3 of
the housing 1 and the longitudinal axis 6 of the housing 7 i9 to
be bridged by the adapter 8, then to begin with ring 19 i9 fasten-
ed to the flange 9 with the aid of the screw 24. The ~ame applies
for ring 20 which is fastenea to the flange 10 with the screw 28.
If the rings 19, 20 are placed ~o that they abut one another, then
it can be seen that even on the outer reference circles 31 of the
rings 19, 20 at least one bore 33 iY in alignment with the elon-
gated hole 32 ~o that despite the existing angle ~ between the
longitudinal axes 3, 6 of the housing~ 1, 7 the two rings 19, 20
can be connected to each other without difficulty with the aid of
the bolt 34.
A further modified exemplary embodiment is illustrated
in Figures 5 and 6, whereby the same reference numerals were re-
tained for the same parts. The adapter 8 illustrated in Figure 5
correapond~ es~entially to that illustrated in Figure 3, only the
~ealing condition~ are altered. Namely, in the exemplary embodi-
ment according to Figure 5 the sealing rings 44 only lie in the --
ring 46 which has the elongated holes 32. In contrast, the ring
45 with the bores 23, 33 has no sealing rings.
Thus, since the same sealing surface condition~ are
created on the two worked outer aurfaces of the ring 46, namely
the outer end face 47 and the inner end face 48, the ring can be
turned i.e. can be folded over a diameter 43 without the sealing
conditions being changed by this turning of 180~. In this exem-
plary embodiment the hole spacing ~a2 of the elongated holes
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can accordingly be added up to 180. The hole ~pacing on the
outer reference circle 31 of the ring 45 is identical to the hole
spacing ~a2 of the other ring 46.
By folding the ring 46 over the axis of symmetry or the
diameter 43, the elongated holes 32 are mirror-inverted, as illus-
trated by the dashed lines in Figure 6. The complete range of
adjuRtment for the angle + ~ is then achieved even if only half
the bore~ 33 compared to the other exemplary embodiment are given
on the outer reference circle 31 of the other ring 45, since in
each case one bore 33 is in alignment with an elongated hole 32 so
that the additional fastener, the bolt 34, can be inserted.
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