DE29618362U1 - Transportable room cell as a substation - Google Patents

Description

PATENT ATTORNEYS EUROPEAN PATENT ATTORNEYS

Patent Attorneys Hiebsch e.a., PO Box 464, D-78204 Singen Dipl.-lng. Gerhard F. Hiebsch Dipl.-lng. Klaus Peege Dipl.-lng. Niels Behrmann M.B.A. (NY)

D-78224 Singen/Germany Heinrich-Weber-Platz 1

Telephone (07731)4 30 Fax (07731) 4 20 99 Telex 793 850hpsi eMail Bodenseepatent®@t-online.de

Our reference: MÜ148DE7 Our file: H/mü

(31) Priority Number /Priority Application Number:

296 04 868.2

(32) Priority Date:

18.03.1996

(33) Priority Country:

EN

(54) Title:

Transportable room cell as a transformer station

(71) Applicant:

Betonbau GmbH Schwetzinger Strasse 22-26 D-68753 Waghäusel

(74) Representative / Agent:

Dipl.-Ing. Gerhard F. Hiebsch Dipl.-Ing. Klaus Peege

DipL-Ing. Niels Behrmann M.B.A. (NY)

-Patentan would- Heinrich-Weber-Platz D-78224 Singen

MU148DE7 **

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-1

TRANSPORTABLE SPACE CELL AS A SUBSTATION

The invention relates to a transportable room cell in the form of a substation -- with a base section -- partially sunk into the ground and containing a conversion space for a transformer or the like according to the preamble of the independent claim.

DE-A-43 10 290 of the applicant discloses, by way of example, such a room cell with side walls attached to a base plate and a roof plate placed on top of it, in which the side walls are connected by partition walls -- which close off the forming chamber at both ends -- and by end walls; the latter delimit stress spaces placed in front of the partition walls on both sides, one of these partition walls having an opening. A recess for a door-like closing element of the forming chamber is provided in at least one of the side walls. In addition, concrete ribs are monolithically formed onto the base plate, which protrude into the cell interior at approximately right angles to the side walls and taper away from the base plate in cross-section. The base ribs form, together with the base plate and side walls, a one-piece base pan for the forming chamber and a base for a wall panel that can be placed on them and delimits the forming chamber. The front wall is equipped with a locking door for a medium-voltage compartment or a low-voltage compartment.

Within one of the wall panels, an opening is provided above the floor rib, which acts as a flow gap for air connecting the medium-voltage compartment and the conversion compartment. The medium-voltage compartment is closed by the floor panel that extends underneath it; sealable feedthroughs for power cables are provided in this. The low-voltage compartment is open towards the floor; its front wall and the floor panel define a floor gap.

MU148DE7

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The cell interior of a substation known for example from the document DE-U-83 34 221 is divided into a transformer room for accommodating the transformer with an oil pan underneath and a switch room for accommodating the high, medium or low voltage switching devices. Such stations are equipped at the factory as so-called prefabricated stations with the necessary switching devices - with the exception of the transformer -, fastening rails and the complete electrical installation including earthing, so that at the construction site only the transformer, usually mounted on wheels, has to be pushed into the cell interior on rails provided in the station. The latter is accessible thanks to two horizontally pivoting doors, which are part of a side wall made of profiles and panels.

In the document DE-U-83 34 221, it was suggested to simplify things by designing a pair of concrete ribs as rails for the transformer of the substation and providing a third concrete rib - also molded onto the floor plate and higher than the other two - as part of the oil pan. A fourth molded rib serves as a support for floor plates, particularly in the part of the substation containing the switch cabinets, and can itself have different heights to adapt to the different floor heights.

In a method for producing a monolithic concrete room cell with a floor slab and four surrounding walls by means of a foldable formwork core with a fixed ceiling, four corner posts or similar corner elements, at least four wall formwork panels and movable external formwork walls, according to DE-A-42 07 499 of the applicant, console strips that project inwards are monolithically concreted onto the surrounding walls of the room cell on the areas opposite the wall formwork panels and when the

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Formwork core, first the wall formwork panels are pulled in by a certain distance and then the corner posts are pulled in by a certain amount.

Knowing this state of the art, the inventor set himself the goal of improving both the cable feed to the rooms and the ventilation of the conversion room in a switching or small station. In addition, it should be easy and inexpensive to manufacture and equip.

The doctrine of the independent claim leads to the solution of this problem; the subclaims indicate advantageous further developments.

According to the invention, the breakthrough of the partition wall runs in that -- determined by the insertion depth
Base section, in addition, the tension space adjoining the partition wall is open towards the floor, whereby in this space a wall is arranged in front of the opening serving as a ventilation slot as a so-called defense wall, the upper edge of which is determined approximately by the insertion depth of the room cell and which is part of a preferably trough-like
The open floor plate of the voltage compartment is used to conveniently route power cables, but undesirably allows groundwater to enter the voltage compartment, which is prevented by the water protection device from reaching the ventilation opening in the partition wall. The ventilation opening is in turn provided in the base section, as this position allows for better ventilation.

Advantageously, the wall or weir wall is attached to the floor slab outside the forming chamber at a distance from the partition wall as well as to the side walls, whereby the height of the weir wall corresponds approximately to the insertion depth of the room cell.

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According to another feature of the invention, the wall -- or weir wall -- is formed onto an edge of the base plate and, together with an adjacent end wall, defines a gap in the base between the side walls.

It has also proven advantageous to form the weir wall onto an extension section of the base plate that protrudes from the intermediate wall in such a way that it protrudes from the base plate within the stress space. This feature allows the width of the base gap to be varied from casting to casting; the ratio of the distance of the weir wall from the associated intermediate wall to its distance from the front wall should preferably be approximately 1:2 to 1:3.

To improve the air flow, it is advantageous that a sill that limits the opening at the bottom is inclined downwards towards the forming space; a lintel that is inclined in the direction of the sill limits the opening at the top - its angle of inclination is greater than that of the sill, so that the vertical opening cross-section tapers towards the forming space. According to a further feature of the invention, the horizontal opening cross-section also tapers in the same way.

Thanks to the above-mentioned requirements, the problem envisaged by the inventor is solved in an impressive manner in room cells or substations of different designs.

In addition, the partition wall that closes off the forming chamber from the low-voltage chamber can be approximately the same height as the weir wall and can be supplemented by an exchangeable plate -- possibly made of sheet metal -- to form a wall area that corresponds to the first partition wall.

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It is within the scope of the invention to form the weir wall and the intermediate wall located farther from it on the edges of the base plate running transversely to the side walls. The edges of the plate are end beads that form a downwardly inclined desk surface in front of the adjoining walls.

According to another feature of the invention, a door-like locking element in the form of a ventilation insert that can be secured in a form-fitting manner in the threshold edge of the recess is formed in a recess in one of the side walls. Plug pins protrude from the lower end of the ventilation insert, which can be inserted into counter-links of a Halfen rail or similar rail element of the threshold edge. In the vertical position of the ventilation insert, it can be secured by a Dirak lock attached to it close to the roof.

The fan insert according to the invention has cross-sections -- which limit flow paths for air -- which are fixed horizontally in an insert frame and each determine the depth of the fan insert by means of a flat front bar, a central strip inclined thereto and a back bar parallel to the front bar; the front bar of one cross-section is opposite the back bar of the cross-section running underneath it, and both are connected approximately horizontally by a grid element which is detachably fixed in them.

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Further advantages, features and details of the invention emerge from the following description of a preferred embodiment and from the drawing; this shows in

Fig. 1, 2: Side views of a switching station in two different sized reproductions;

Fig. 3, 4: the two front views of the switching station;

Fig. 5: an enlarged longitudinal section

according to line V-V of Fig. 1 through a roof corner area of the switching station;

Fig. 6: the vertical longitudinal section through

the switching station;

Fig. 7: a horizontal section through

the switching station;

Fig. 8: a vertical cross section through

the switching station to line VIII-VIII in Fig. 7;

Fig. 9: an enlarged horizontal section

section along line IX-IX of Fig. 4;

Fig. 10, 11: two enlarged sections of a

vertical section along line X-X of Fig. 1;

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Fig. 12, 13, 14: representations of a further embodiment of the switching station corresponding to Fig. 6, 7, 8, whereby the section line XIV-XIV to the vertical section of Fig. 14 can be seen in Fig. 13, the section plane of which is designated by H (Fig. 14);

Fig. 15: an enlarged section of

Fig. 12 with a ventilation slot in a partition wall;

Fig. 16: a partial cross section through the

Partition wall according to line XVI-XVI in Fig. 15;

Fig. 17: a front view of the

ventilation slot.

A cuboid-shaped, non-walkable switching or small station 10 -- with an example length a of about 3,000 mm, a width b of 1,300 mm, a total height e of about 2,400 mm and a height h of about 1,650 mm visible above a lawn edge 12 -- for accommodating a not shown transformer that can be moved on rollers has side walls 16 molded onto a base plate 14 and two end walls 18 connecting these in their lower area. The side walls 16 carry a roof plate 20 placed on their upper edges 17.

In the side walls 16, a recess 22 is provided for a door-like fan insert 24, the frame 26 of which is cast into the side wall 16 in such a way that the outer surface of the fan insert 24 runs inside the side wall 16. The horizontal threshold edge 23 of the recess 22 is located at a distance f of approximately 760 mm from the lower surface of the base plate 14, the thickness i of which is otherwise approximately

MÜ148DE7

120 mm. The threshold edge 23 is aligned with the upper edges 19 of two concrete strips representing the end walls 18, which are cast onto the end walls 16 at a distance η of 30 mm above a plane E determined by the underside of the floor slab.

The threshold edges 23 simultaneously determine the base section of the switching station 10 that can be lowered into the natural soil and thus its installation depth d; the switching station 10 is set into the soil in such a way that the lawn edge or soil surface 12 lies slightly below the threshold edges 23 or the upper edges 19.

Single-leaf -- or possibly double-leaf -- locking doors 28 extend between the upper edges 19 of the concrete strips or end walls 18 and the roof slab 20 and are hinged to frames 32. The latter run in a recess 34 in the inner surface 15 of the side wall 16; this recess 34 is part of a -- in horizontal cross-section -- two-stage molding, the second -- outer -- step of which begins at a shoulder recess designated 3 6 in Fig. 9, the side surface 3 7 of which is inclined outwards and enables an optically narrow end edge 3 8 of the side wall 16. The width y of the end edge 3 8 measures less than 50 mm and is thus about half shorter than the thickness I ₁ of the side wall 16. The frame 32, which is approximately Z-shaped in cross-section, is hinged with one of its legs to the shoulder recess 3 6; the other leg carries a seal 40 for the closure door 28 filled with insulating material 42 between two parallel plates 41. Its front surface is flush with the shoulder 36.

At a distance k of about 900 mm from the left end wall 18 in Fig. 6, an intermediate wall 44 is formed on one edge of the rectangular base plate 14, opposite which a second intermediate wall 45 is located on the other edge of the plate. The plate edges form a downwardly inclined end bead 46 outside of these intermediate walls 44, 45. The inclination of this bead corresponds to

MÜ148DE7 "I?-:": ·: :**i

On the inner side of the partition walls 44, 45 there is a counter-inclined desk surface 48 as a transition to the base plate 14. This transition is also present on the side walls 16.

The intermediate walls 44, 45, which are formed monolithically onto the base plate 14 with a length a _x of 2,000 mm and onto the side walls 16, delimit a forming chamber 50 for the transformer. Adjacent to the forming chamber 50 - in Fig. 6, 7 and 12, 13 - is a medium-voltage chamber 52 on the left and a low-voltage chamber 54 with a depth t of approximately 200 mm on the right for corresponding MV and LV switching devices; both chambers 52, 54 are open downwards and to the outside below the end walls 18. These MV and LV switching devices have been neglected in the drawing for reasons of clarity; only in Fig. 12 is an MV switching device resting on support rails 51 indicated at 53.

In Fig. 6, a foundation plate 56 -- of length a _x and width b -- with a U-shaped cross-section can be seen as a support for the base plate 14; the two end legs 58 of the foundation plate 56 are directed away from the base plate 14 as foot strips.

In the MS partition wall 44, in its lower area, a slot-like opening 60 is made with a lintel 62 inclined downwards towards the forming space 50 and a likewise inclined sill 63, which is spanned by a ventilation grille 64.

The frame 26 for the fan insert 24 is an extruded frame profile made of an aluminum alloy. It forms an overall U-shaped frame.

The fan insert 24 has an insert frame 66, which is arranged with a box-like edge bead 68 in front of a front-parallel stop shoulder 70 of the side wall 16; in this edge bead 68, a hose seal rests in Fig. 10

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40. Within the insert frame 66 runs a flat sheet metal profile 72 of width q as a frame for cross profiles 74, which each consist of a narrow front web 76, an inclined centre strip and a back web 78 and are fixed parallel so that the front web 76 of one cross profile 74 is opposite the back web 78 of the cross profile 74 below; between these runs a grid sheet 80 as poke protection.

On the lower part of the sheet metal profile 72, pins 82 are provided, which are inserted into a Halfen rail 84 of the recess reveal.

Near the upper end of the ventilator insert 24, in the longitudinal center, a so-called Dirak lock 86 is provided, the invisible locking bolt of which engages in the frame 26 in the closed position when that upper end strikes a steel angle 88 fixed to the roof plate 20.

This steel angle 88 also serves to connect the roof panel 20 and the side wall 16, as shown in Fig. 5. It is also made clear there that the peripheral edge 21 of the roof panel 20 is flush with the outer surface 90 of the side wall 16, which is notched upwards to form an outwardly inclined shoulder surface 92 and a joint 94 running under the roof panel 20 in such a way that the width y of 50 mm of the remaining upper edge 17 is slightly larger than half the wall thickness I ₁ . The width ζ of that joint 94 in the plane of the outer surface 90 corresponds here to the dimension of the width V ₁ .

In the free projection of the roof panel 20, a drip groove 96 is provided above the shoulder surface 92.

In the embodiments of a room cell or

Switching station 10 _a of Fig. 12 to 17 is the

Ventilation slot or opening 60 of the partition wall 44

total below the area determined by the lawn edge 12

MU148DE7 -IaN &Idigr; III J ·· .

horizontal plane H (Fig. 14). Its lintel 62 runs -- inclined downwards towards the forming space 52
cross-sectionally at a greater angle of inclination w to the horizontal than the sill 63 -- angle W ₁ --, whereby the side reveals 59 also point to each other at a horizontal angle W ₂ .

To protect the breakthrough 60 -- and thus the forming space 50 -- against groundwater that would otherwise penetrate, a weir wall 98 is arranged in front of the MS intermediate wall 44 at a distance k _x -- which here is less than half the distance k of the MS intermediate wall 44 from the adjacent end wall 18. This is cast onto the base plate 14, which is extended by a section 14 _a , to form an outward-facing end bead 46 and projects within the medium-tension space 52. In this, that end bead 46, with the adjacent end wall 18, delimits a floor gap 47 of width g extending between the side walls 16 as a cable passage or the like.

According to Fig. 12, 14, the upper edge 99 of the weir wall 98 is approximately flush with that plane H or runs slightly below it.

At the switching station 10 _a, the right-hand LV partition wall 45 _a in Fig. 12 ends slightly above the plane H; the distance fL of its upper edge to the lower surface of the base plate 14 is here about 800 mm and corresponds approximately to the distance f of the latter from the threshold edge 23 of the recess 22. Between this LV partition wall 45 _a and the roof plate 20 runs a sheet metal partition wall 100 placed on the LV partition wall 45 _a .

As already discussed, the ventilation device in the partition wall 44 consisting of a breakthrough or ventilation slot 60 and ventilation grille 64 serves to improve ventilation of the transformer room 50. For this purpose, this ventilation slot 60 is both inclined downwards and is surrounded by a

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The cross-section tapers towards the outside - this is to produce a jet effect. The ventilation slot 60 shown as an example in Fig. 15 to 17 - with the insert frame 65 for the ventilation grille 64 formed in the intermediate wall 44 - has an external height c of 3 00 mm and a narrowest height C ₁ of 280 mm on the transformer room side. The external width s measures 780 mm and the narrowest internal width S ₁ 680 mm.

Claims (18)

MÜ14 8DE7 CLAIMS 1. Transportable room cell in the form of a transformer station with a base section partially lowered into the ground, containing a conversion space for a transformer or the like, with side walls attached to a base plate and a roof plate spanning this, in which the side walls are connected by at least one intermediate wall delimiting the conversion space and by at least one end wall which delimits a voltage space with the intermediate wall, wherein the intermediate wall has an opening, characterized, that the opening (60) of the intermediate wall (44) runs in the base section (insertion depth d) and the stress space (52) adjoining the intermediate wall is open towards the floor, wherein in this a wall (weir wall 93) is arranged in front of the opening serving as a ventilation slot at a distance (kj), the upper edge (99) of which is determined approximately by the insertion depth of the spatial cell (10, 10 _a ) and which is part of an approximately trough-like water protection device provided by the opening. 2. Room cell according to claim 1, characterized in that the wall (defence wall 98) is attached both to the base plate (14, 14 _a ) outside the forming space (50) at a distance (kj from the intermediate wall (44) and to the side walls (16), its height approximately corresponding to the insertion depth (d) of the room cell (10, 10 _a ). MÜ148DE7 ·**::**: 3. Room cell according to claim 1 or 2, characterized in that the wall (defensive wall 98) is formed on an edge of the floor plate (14, _14a ) and, with an adjacent end wall (18) between the side walls (16), delimits a floor gap (47). 4. Room cell according to one of claims 1 to 3, characterized in that the wall (defensive wall 98) is formed on a projection section (14 _a ) of the base plate (14) projecting from the intermediate wall (44) and projects from the base plate (14 _a ) within the stress space (52). 5. Room cell according to one of claims 1 to 4, characterized in that the ratio of the distance Ck ₁ ) of the wall (weather wall 98) from the intermediate wall (44) to its distance (k) from the end wall (18) is approximately 1:2 to 1:3. 6. Room cell according to claim 1, characterized in that a sill (63) delimiting the opening (60) towards the floor is inclined downwards towards the forming space (50). 7. Room cell according to claim 1 or 6, characterized by a lintel (62) of the opening (60) inclined approximately in the direction of the sill (63), wherein its vertical section delimited by both surfaces tapers towards the forming space (50). 8. Room cell according to claim 6 or 7, characterized in that the lateral reveals of the opening (60) are inclined towards each other and the horizontal cross section of the opening tapers towards the forming space (50). MU148DE7 -\5 % J ·; ; * ; ;« 9. Room cell according to at least one of claims 1 to 8, characterized in that the height (f _x ) of the other intermediate wall (45 _a ) corresponds approximately to the height of the wall (dam wall 98) and is supplemented by an exchangeable plate (100) to form a wall surface corresponding to the first intermediate wall (44). 10. Room cell according to at least one of claims 1 to 9, characterized in that the wall (weir wall 98) and one of the intermediate walls (44,45 _a ) are formed on edges of the base plate (14,44 _a ) running transversely to the side walls (16). 11. Room cell according to claim 10, characterized in that the panel edges are end beads (46) which form a downwardly inclined desk surface in front of the adjoining walls ( _45a , 98). 12. Room cell according to at least one of claims 1 to 11, characterized in that the floor plate (14, 14 _a ) is arranged on a foundation plate (56). 13. Room cell according to claim 12, characterized by a U-shaped cross-section of the foundation plate (56), the legs of which run as foot-like transverse formations (58) on the side of the plate facing away from the intermediate walls (44, 45, _45a ) under the latter. 14. Room cell according to at least one of claims 1 to 13, characterized in that the end walls (18) are formed by concrete strips molded onto the side walls (16), which run at a distance (k,t) from the floor slab ( _14,14a ) and at a distance (n) from the lower edge of the side walls. MÜ148DE7 15. Room cell with at least one recess for a door-like closing element of the transformer room in a side wall according to at least one of claims 1 to 14, characterized in that the door-like closing element is a ventilation insert (24) that can be fixed in a form-fitting manner in the threshold edge (23) of the recess (22). 16. Room cell according to claim 15, characterized by plug pins (82) of the ventilation insert (24), which can be inserted into counter links of a Halfen rail (84) or similar rail element of the sleeper edge (23). 17. Room cell according to claim 15 or 16, characterized in that the ventilation insert (24) has flow paths for air-limiting cross-sections (74) which are fixed horizontally in an insert frame (66) and each determine the depth of the ventilation insert by means of a flat front web (76), a central strip inclined thereto and a back web (78) parallel to the front web, whereby the front web of one cross-section is opposite the back web of the cross-section running underneath and both are connected approximately horizontally by a grid element (80) which is detachably fixed in them. 18. Room cell according to one of claims 15 to 16, characterized in that the ventilation insert (24) is provided at its upper end with at least one closing element (86).