DE29909585U1 - Substation - Google Patents

Description

HlEBSCH PEEGE B E H F>.M &bgr;&Ngr;&EEgr;

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EUROPEAN PATENT AND TRADEMARK ATTORN*??? **

Application for registration of a utility model

Our reference: MÜ171DE8H/ke

(31) Priority Application Number: 29903319.8

(32) Priority Date:

25.02.1999

(33) Priority Country I Priority Country:

Germany

(54) Title:

SUBSTATION

(71) Applicant:

Betonbau GmbH Schwetzinger Str. 22-26

68753 Waghäusel Germany

(74) Representative / Agent:

Dipl.-Ing. Gerhard F. Hiebsch

Dipl.-Ing. Dr. oec. Niels Behrmann M.B.A. (NY)

Heinrich-Weber-Platz 78224 Singen

Oral agreements require step-by-step confirmation to be effective.

Parking in the building (entrance: Freiheitstraße)

LAKE CONSTANCE PATENT« ⁵

MU171DE8 - 1 -

SUBSTATION

The invention relates to a transformer station with a room for at least one transformer, with at least one medium-voltage switchgear and a low-voltage distribution in a monolithic cuboid-shaped cast structure having walls and a plate connecting them, in which a fan door with at least one passage gap as a flow path for air is arranged in at least one of the walls.

Such transformer stations usually consist of a cuboid-shaped structure, cast monolithically from walls and a base plate, which is placed on the edge of the lawn and covered with a concrete slab as a roof. For example, see the document DE-U-92 14 978.

DE-A-198 21 592 describes electrical switching stations whose lower part is embedded in the ground and which accommodate a transformer, a high-voltage part and a low-voltage part.

A ventilator door with a passage gap running approximately parallel to the lower edge of the door in its vicinity as a flow path for air can be found in the document DE-U-I 974 231; this ventilator door consists of a sheet metal plate spanning a hollow metal profile frame as a door filling, the base area of which is angled outwards from the door plane and forms a type of hood with an inclined desk surface. This hood is delimited at the sides by metal angles that are to be attached separately to the lower end of the door as a screen, and its opening facing towards the floor - i.e. at right angles to the door plane - is spanned by a perforated sheet that is horizontal in the installed position.

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According to DE-U-88 04 820, the front wall of a monolithically formed switching station is formed by a two-wing fan door with horizontal air slots. These air slots are provided between inclined door strips fixed at the end to a frame.

DE-U-92 06 780 has disclosed a ventilator door with a door leaf formed by slats, in which the slats determine the depth of the ventilator door by means of flat front and back sections and two adjacent slats -- by means of cross-sectional parts angled from the front and back sections -- delimit meandering flow paths.

In view of this state of the art, the inventor has set himself the goal of creating a transformer station of the type mentioned at the beginning with particularly favorable ventilation and inspection options, which is therefore easily accessible for operation.

The teaching of the independent claim leads to the solution of this problem - the subclaims indicate advantageous further developments. In addition, all combinations of at least two of the features disclosed in the description, the drawing and/or the claims fall within the scope of the invention.

According to the invention, the transformer compartment housing the transformer is delimited on the one hand by external walls of the substation and on the other hand by an internal wall which extends underneath the medium-voltage and low-voltage parts; this internal wall should preferably consist of three intermediate walls, the middle of which starts from the front wall and runs approximately parallel to the side walls; its upper edge is provided approximately at the level of the door sill -- below it.

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According to another feature of the invention, the middle partition wall forms a support element for a support surface of the medium-voltage part with a further partition wall which reaches under the medium-voltage part and runs approximately parallel to the front wall and adjoins it; this support surface comprises a base frame which projects beyond the partition wall which is parallel to the front wall towards the rear wall of the structure and is provided with a cooling grid or similar cooling device for gases flowing through, at least in the section which projects beyond it in this way. For this purpose, it has proven advantageous to assemble the cooling grid from several grid layers, preferably from more than five such layers.

According to the invention, the cooling grille spans a part of a lower space in which at least one cable support device is arranged and towards which the upper edge of the intermediate wall running parallel to the front wall is inclined downwards.

According to the invention, a further partition wall with a narrow edge adjoins the partition wall parallel to the side walls on the side facing away from the lower space. This third partition wall is attached at the other end to a side wall of the building and its height should be less than the heights of the two other partition walls described above.

The third partition wall is advantageously supported - adjacent to the partition wall at right angles to it - by a walkable plate extending to the door threshold, thanks to which the transformer space between the two voltage parts can be reached.

In addition, it has proven to be advantageous that the front wall or an adjacent inclined front strip is provided with through holes for cables -- i.e. not with conventional cable ducts; the front wall, the front strip, the base plate and the partition walls delimit at least one of the cable

MU171DE8 - 4 -

receiving anteroom for the liquid-tight floor pan of the building formed by part of the floor slab, the rear wall of the building, sections of the side walls of the building and the partition walls. To ensure this tightness, the partition walls should be watertightly insulated from each other and from the floor slab, and if necessary cast monolithically.

The invention also includes a ventilator door for this substation; in this ventilator door, within a door interior defined by the cross-sectional length of a door frame or frame profile, a door insert is arranged with a desk surface extending from a base strip and inclined away from the outer door surface at an angle; the base strip, together with the lower edge of a spaced-apart front panel of the ventilator door, delimits a passage gap for exhaust air in the outer door surface. In addition, this door insert should have the base strip with adjoining desk surface and - as its other boundary - an end strip parallel to the base strip, the latter being assigned to the inner edge of the frame profile in the installed position.

According to a further feature of the invention, a plug or spring strip flanking the passage gap should protrude from both ends of the base strip of the door insert; the upper edge of the base strip formed by the angled desk surface runs between the two plug strips, which serve to secure the door insert in plug grooves in the door frame. For this purpose, the plug strip sits with at least part of its width in an approximately vertical slot or a receiving groove in the door frame or frame profile. It is particularly advantageous if the base strip and the plug strips are attached in three U-shaped receiving grooves in the frame profile.

MU171DE8 - 5 -

In another embodiment, the base strip is attached to an outer rib that protrudes from the frame profile and serves as a stop bar; the latter can be screwed or glued to the base strip that is adjacent to it on the inside.
The frame profile preferably has a hollow profile section with an angle web protruding from the frame flank side, which can form a channel formation of the frame profile that is open to the interior of the building for receiving a sealing element. In the sealing position, this should rest against a stop rib or similar counter element of a frame that at least partially surrounds the ventilator door.

In order to provide protection against flying particles and to ensure safety against poking, an insert made of a perforated plate, preferably a perforated sheet, should extend between the inner end strip of the door insert and the front panel; the latter should be bent in such a way that it offers a desk surface inclined towards the parallel end strips.

Advantageously, the desk surfaces of the door insert and the perforated insert can be directed in opposite directions to each other.

Thanks to this invention, a transformer or substation is created with a specially designed interior partition wall in the base area, as well as with an accessible plate in the space between the MV and LV parts for better control of the transformer. The base frame for the MV part extends beyond the interior partition wall to the transformer room and contains the multi-layer cooling grille there, so that hot gases escaping downwards from the MV system enter the transformer room cooled and are then discharged to the outside via the door ventilation. The described bevel of the interior wall running parallel to the front in the area of the MV system is also important with the cable clamp in front for

MU171DE8 - 6 -

ϕ&psgr; ft»·· t» V* ■ · ··

sufficient cable radii for the cable feed of the MV system.

The following are further advantages of the transformer station according to the invention:

• the bevel of the station front wall and the openings in this bevel serve to introduce MV and LV cables, which helps to replace concreted cable penetrations;

• the entire body can be manufactured from a single cast with the Z-shaped inner partition;

• despite the absence of cable ducts, the Water Resources Act is complied with, as the transformer trough is made from a single cast and is closed by the concreted and unperforated interior partition wall and rises to a height of 10 cm above the lawn edge;

• the conversion station is very compact due to the offset arrangement of the transformer on the one hand and the voltage parts on the other.

Also important is the special under-door ventilation, which brings significant advantages, particularly in production - but also in use; side panels no longer need to be manufactured and installed, as the door frame profile itself forms the side boundary. Street dust is also retained better than with previously known solutions. As there is no longer a projection in the ventilation door itself, a larger opening angle is created in the arrangement of the door frame/door leaf, which is set back in the door reveal. Here, the bent sheets can be easily glued on using double-sided adhesive film or other adhesive techniques.

MU171DE8 - 7 -

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawing, which shows in

Fig. 1: a front view of a partially underground transformer station;

Fig. 2: a side view of Fig. 1;

Fig. 3: a vertical section through Fig. 2;

Fig. 4: a vertical section through Fig. 1;

Fig. 5: a horizontal cross-section through the transformer station of Figs. 1 to 4;

Fig. 6: another horizontal section through a transformer station, approximately corresponding to Fig. 5;

Fig. 7: a vertical section through a transformer station corresponding to Fig. 6;

Fig. 8, 9: two vertical sections through the transformer station, approximately corresponding to the illustration in Fig. 3, along the lines VIII-VIII and IX-IX of Fig. 6 respectively;

Fig. 10: the top view of a base frame for a medium voltage or MV system as indicated in Fig. 6;

Fig. 11: a cross section through Fig. 10;

MÜ171DE8 - 8 -

Fig. 12: a side view of a cable clamp;

Fig. 13: the section through Fig. 12 along the line XIII - XIII;

Fig. 14: enlarged sections of Fig. 6 according to arrows XIV;

Fig. 15: a partial view of Fig. 8 according to arrow XV;

Fig. 16: the left area of Fig. 14 with a partially reproduced fan door arranged therein;

Fig. 17: a partial longitudinal section of a mounting part for the fan door;

Fig. 18: a partial longitudinal section through an embodiment of the fan door;

Figs. 19, 21,

23: a side view of different partition walls;

Figs. 20, 22,

24: Front views of Fig. 19, 21, 23.

According to Fig. 1 to 5, a cuboid-shaped substation or transformer station 10 with a length a of 260 cm and a width b of 150 cm has side walls 14 cast monolithically onto a base plate 12, as well as a rear wall 15 and a front wall 16, as well as a roof plate 18 attached thereto. The total height h of the monolithic body 12 to 16 measures approximately 240 cm with a maximum thickness e of the roof plate 18 of 10 cm.

MU171DE8 - 9 -

The front wall 16, which is cast onto the base plate 12 by means of an inclined front strip 13 -- which offers recesses as cable passages 17 -- is equipped with a two-part hinged door 20 across its clear width, the height i of which determines the installation depth of the transformer station 10 in the building ground; the transformer station 10 is embedded in this with an installation depth I ₁ below the lawn edge B. The structure 10 rises above the latter with a free height h _x of, for example, 150 cm.

In the embodiment of Fig. 1, the wing door 20 comprises a left door leaf 22 with a ventilation device 24 close to the floor and a right door leaf _22a with two fields 26 of horizontal slats delimiting passage gaps.

Special designs of the door leaf 22 are particularly evident from Fig. 16 to 18, the opening position of which is indicated in Fig. 16 at 22 _e . A concrete rib 2 8 is formed on the side wall 14, which defines a recess in the structure 10 for the hinged door 20. The frame 3 0, which is essentially made of extruded hollow profiles, is connected to these concrete ribs 2 8 on several sides and is provided with a cross-sectionally L-shaped stop rib 32 on its inner wall 31 facing the door; the longitudinal edge of its leg 33, which is directed parallel to the inner wall towards the outside of the station, forms a stop for a sealing profile 36 of the hinged door 20.

The door leaf 22 has a delimiting door frame 38 - also made of an extruded profile - which comprises a hollow profile section or flank box 3 9 and an angle web 4 0 formed on one end thereof; the latter is part of a channel formation which accommodates the inward-facing, cross-sectionally rectangular sealing profile 36. The long leg of the angle piece or angle web 4 0 delimits the bottom of the channel formation with a parallel shaped web of the angle

MU171DE8 - 10 -

Piece 40 has a receiving groove 42 for a plug or spring strip 44 of a door insert 46 formed from sheet metal with a thickness f of approximately 2 mm.

The door insert 46 offers, between the plug-in strips 44 of width η of approximately 22 mm, which protrude from both ends of a base strip 48 -- of height c of preferably 20 to 30 mm -- a desk surface 49 which is inclined inwards from its plane at an angle of inclination t of 30° and whose length corresponds approximately to the height of the plug-in strips 44. The rear end of the desk surface 49 in Fig. 17 is formed by an upturned end strip 50 of height C ₁ of 20 mm, directed parallel to the base strip 48, to which a head strip 50 _a inclined towards it, also of height C ₁ , can be connected at the top. In the installed position, the panel surface 49 of the door insert 46 extends at a distance r of approximately 25 cm from the lower edge 52 of an upper front plate 54 of the fan door or the wing 22. The latter, together with the upper edge 47 of the base strip 48, delimits an air passage gap 56.

In Fig. 1, 7, however, a wing 22 with a simple passage gap 56 is shown, over which a hood part 23 of the ventilation device 24 extends.

The ventilator door or the door leaf 22 of Fig. 18 is defined by a door frame or frame profile 38, the surrounding hollow profile 39 _a of which has an approximately square cross-section with an external width r of 44 mm here, from which the angle web 40, i.e. the channel formation for the sealing profile 36, protrudes. This angle web 40 protrudes all the way around in front of the front wall 41 of the hollow profile 39 _a with a width dimension T ₁ of 5 mm here. The front wall 41 is extended by an external rib 58, which forms an external stop for the door insert 46; this external rib 58 rests on the inside of the base strip 48 of the door insert 46.

On the outer side of the door there is a rim strip 60 which, together with the outer rib 58, forms the door interior 21 of a

MU171DE8 - 11 -

·

Width &khgr; of approximately 38 mm. The edge strip 60 rests in a shoulder recess of the hollow profile 39 _a shown in Fig. 18. The end strip 50 is glued or riveted to an adjacent parallel end strip 62 of a perforated sheet insert 64.

The perforated sheet insert 64 consists of two parallel end strips 62 and a desk surface 63 of length ρ of 50 mm running between them and inclined to them at an angle w of 45°. Alternatively, an angled perforated sheet insert with an end strip provided on the horizontal leg can also be installed; on the other hand, the vertical leg of such a perforated sheet insert - not shown - is attached to the inner surface of the upper front plate 54.

Fig. 14 shows the stop of the frame 30 on the concrete ribs of the side walls 14, Fig. 15 the corresponding pairing on the front wall 16. The inner surface of the walls 14, 16 in the area of the interior of the building is marked with 19 for the sake of better clarity.

A transformer 66 is installed on the base plate 12 near the rear wall 15 in a so-called transformer room 11, to which a medium-voltage switchgear or a (MV) medium-voltage part 68 and a low-voltage distribution, i.e. a (LV) low-voltage part 70, are assigned and both are fixed at a distance from the base plate 12. Three intermediate walls 72, 74, 76 protrude from the latter to support those voltage parts 68, 70, which form a stepped in plan view - if necessary cast onto the base plate 12.
Form an inner wall and the middle wall extends at right angles from the front wall 16 and runs with an intermediate wall 72 parallel to this at a distance q of, for example, 45 cm under the medium-tension part 68. The third intermediate wall 76 is at a smaller distance q _a of, for example, 3 0 cm from the front wall 16.

MÜ171DE8 - 12 -

The first two partition walls 72, 74 with a height y of around 74 cm support a base frame 78 for the MS part 68 which projects beyond the partition wall 72 parallel to the front wall and has a cooling grille 79 - here six-layered - which partially spans the surface of the base frame 78; thanks to this, hot gases escaping downwards from the MS part 68 in a lower space 80 can reach the transformer room 11 in a cooled state and then out via the door ventilation. In the area of the lower space 80 close to the front wall there runs a Halfen rail 82 as a cable support iron; this is equipped at both ends with a bracket 83 in the form of an angle iron. The upper edge 73 of the partition wall 72 - with a length &zgr; from here 94 cm -- is inclined downwards like a desk towards the front wall 16 and ends -- as can be seen in Fig. 19 -- forming an edge recess 71 at a distance from the adjacent side wall 14. The upper edges 75, 77 of the other two intermediate walls 74, 76 run horizontally approximately at the level of the door sill edge 29 (Fig. 15).

The height V ₁ of the third partition wall 76, which abuts the middle partition wall 74 with a narrow side 77 _S , measures 67 cm, its length Z ₁ is approximately 128 cm with a thickness d of all partition walls 72, 74, 76 of 100 mm. On this NS partition wall 76, close to the transverse partition wall 74 -- in the building center line M -- there is a step plate 84 with a square top view.

Claims (28)

1. Transformer station with a room for at least one transformer, with at least one medium-voltage switchgear and a low-voltage distribution in a monolithic cuboid-shaped cast structure having walls and a plate connecting them, in which a fan door with at least one passage gap as a flow path for air is arranged in at least one of the walls, characterized in that the transformer room ( 11 ) accommodating the transformer ( 66 ) is delimited on the one hand by outer walls ( 14 , 15 ) of the transformer station ( 10 ) and on the other hand by an inner wall ( 72 , 74 , 76 ) above which the medium-voltage and the low-voltage parts ( 68 , 70 ) are arranged. 2. Transformer station according to claim 1, characterized in that the inner wall consists of three intermediate walls ( 72 , 74 , 76 ), the middle one of which starts from the front wall ( 16 ) and runs approximately parallel to the side walls ( 14 ), with its upper edge ( 75 ) being provided approximately at the height of the door threshold ( 29 ). 3. Transformer station according to claim 2, characterized in that the middle partition wall ( 74 ) forms a support element for a support surface ( 78 ) of the medium-voltage part with an intermediate wall ( 72 ) which engages under the medium-voltage part ( 68 ), runs approximately parallel to the front wall ( 16 ) and adjoins it. 4. Transformer station according to claim 3, characterized in that the support surface contains a base frame ( 78 ) which projects beyond the intermediate wall ( 72 ) running parallel to the front wall ( 16 ) towards the rear wall ( 15 ) of the structure ( 10 ) and is provided with a cooling grid ( 79 ) or similar cooling device at least in the section thus projecting. 5. Transformer station according to claim 4, characterized in that the cooling grid ( 79 ) comprises more than five grid layers. 6. Transformer station according to claim 4 or 5, characterized in that the cooling grid ( 79 ) spans a part of a subspace ( 80 ) in which at least one cable interception device ( 82 ) is arranged. 7. Transformer station according to claim 6, characterized in that the upper edge ( 73 ) of the intermediate wall ( 72 ) running parallel to the front wall ( 16 ) is inclined downwards towards the cable support device ( 82 ). 8. Transformer station according to claim 6 or 7, characterized in that on the intermediate wall ( 74 ) parallel to the side walls ( 14 ) on the side facing away from the lower space ( 80 ) a further intermediate wall ( 76 ) with a narrow edge ( 77 _s ) adjoins and at the other end is attached to a side wall ( 14 ) of the structure ( 10 ). 9. Transformer station according to claim 8, characterized in that the height (y ₁ ) of the further intermediate wall ( 76 ) is less than the respective height (y) of the other two intermediate walls ( 72 , 74 ). 10. Transformer station according to claim 8 or 9, characterized in that a walkable plate ( 84 ) extending to the door threshold ( 29 ) rests on the further intermediate wall ( 76 ). 11. Transformer station according to one of claims 1 to 10, characterized in that the intermediate wall ( 72 , 74 , 76 ) is cast onto the base plate ( 12 ) of the structure ( 10 ). 12. Transformer station according to one of claims 1 to 11, characterized in that the intermediate walls ( 72 , 74 , 76 ) are connected to one another in a watertight manner. 13. Transformer station according to one of claims 1 to 12, characterized in that the front wall ( 16 ) or an inclined front strip ( 13 ) adjoining it is provided with through openings ( 17 ) for cables. 14. Transformer station according to claim 11 and 13, characterized in that the front wall ( 16 ) with the front strip ( 13 ), the base plate ( 12 ) and the intermediate walls ( 72 , 74 , 76 ) delimits at least one antechamber for a liquid-tight floor pan of the structure ( 10 ) formed by the intermediate walls, the base plate and regions of the outer walls ( 14 , 15 ). 15. Transformer station with a fan door ( 22 ) at least partially surrounded by a frame according to one of claims 1 to 14, characterized in that the fan door ( 22 ) has a door insert ( 46 ) within a door interior space ( 21 ) determined by the cross-sectional length of a door frame or frame profile ( 38 ), which is provided with a desk surface ( 49 ) extending from a base strip ( 48 ) and inclined away from the outer door surface at an angle (t), wherein the base strip delimits a passage gap ( 56 ) in the outer door surface of the fan door with the lower edge ( 52 ) of a spaced-apart front panel ( 54 ). 16. Transformer station according to claim 15, characterized in that the door insert ( 46 ) has the base strip ( 48 ) with adjoining desk surface ( 49 ) and, as its other boundary, an end strip ( 50 ) parallel to the base strip, the latter being assigned to the inner edge of the frame profile ( 38 ) in the installed position. 17. Transformer station according to claim 15 or 16, characterized in that at both ends of the base strip ( 48 ) of the door insert ( 46 ) a plug or spring strip ( 44 ) flanking the passage gap ( 56 ) protrudes from the latter, wherein the upper edge of the base strip bordering the desk surface ( 49 ) runs between the two plug strips. 18. Transformer station according to claim 17, characterized in that the plug-in strip ( 44 ) sits with at least part of its width(s) in an approximately vertical slot or a receiving groove ( 42 ) of the door frame or frame profile ( 38 ). 19. Transformer station according to claim 17 or 18, characterized in that the base strip ( 48 ) and the plug-in strips ( 44 ) run in three mutually U-shaped receiving grooves ( 42 ) of the frame profile ( 38 ). 20. Transformer station according to one of claims 15 to 19, characterized in that the base strip ( 48 ) is attached to an outer rib which projects from the frame profile ( 38 ) and serves as a stop web and which is screwed or glued to the base strip which rests against it on the inside. 21. Transformer station according to one of claims 15 to 20, characterized in that the frame profile ( 38 ) has a hollow profile section ( 39 ) with an angle web ( 40 ) projecting on the frame flank side. 22. Transformer station according to claim 21, characterized in that the angle web ( 40 ) forms a channel formation of the frame profile ( 38 ) which is open towards the interior of the building for receiving a sealing element ( 36 ). 23. Transformer station according to claim 22, characterized in that the sealing element ( 36 ) is arranged in the sealing position so as to be able to rest against a stop rib ( 32 , 33 ) or similar counter element of a frame ( 30 ) at least partially surrounding the fan door ( 22 ). 24. Transformer station according to one of claims 1 to 23, characterized in that the distance (g) of the lower edge ( 52 ) of the front plate ( 54 ) to the desk surface ( 49 ) of the door insert ( 46 ) is shorter than the clear width (x) of the door interior ( 21 ). 25. Transformer station according to one of claims 1 to 24, characterized in that an insert ( 64 ) made of a perforated plate extends between the inner end strip ( 50 ) of the door insert ( 46 ) and the front plate ( 54 ). 26. Transformer station according to claim 25, characterized in that the insert ( 64 ) consists of a perforated sheet with a desk surface ( 63 ) running between parallel end strips ( 62 ) and inclined towards these. 27. Transformer station according to one of claims 1 to 26, characterized in that the panel surface ( 49 , 63 ) of the door insert ( 46 ) and the perforated insert ( 64 ) are directed in opposite directions to each other. 28. Transformer station according to claim 26 or 27, characterized in that the inner end strip ( 50 , 62 ) of the door insert ( 46 ) and the perforated plate insert ( 64 ) are joined together ( Fig. 18).