Claims:We claim:
1) A means (200) for assembling or dismantling a casing (12) of a turbine to or from a base plate (10), said means (200) comprising :
a) a support block (24) with at least one hole (H1) for accommodating a hexagonal bolt (28) and at least one hole (H2) for accommodating a pin (30) are provided along the same axes and centerlines, said support block (24) coupled to said base plate (10) at a predefined position ; and
b) a coupling block (26) comprising a vertical block (V) integrally formed with a horizontally extending block (HB) proximal to its bottom end, said vertical block (V) provided with a key way slot (KS2) therein and said horizontally extending block (HB) provided with at least one hole (H3 and H4) symmetrical to said one hole (H1 and H2) of said support block (24), said key way slot (KS2) of said coupling block (26) adapted to mate with a key (K) of said casing (12) in such a way that said vertical block (V) mounts on said base plate (10) and said horizontally extending block (HB) mates with said support block (24) and locked in position by means of said hexagonal bolt (28) and said pin (30).

2) A means (200) for assembling or dismantling a casing (12) of a turbine to or from a base plate (10) as claimed in claim 1, wherein combination of said hexagonal bolt (28) and said pin (30) facilitates in alignment of said horizontally extending block (HB) of said coupling block (26) with said support block (24) without any tilt.

3) A means (200) for assembling or dismantling a casing (12) of a turbine to or from a base plate (10) as claimed in claim 1, wherein said key way slot (KS2) of said coupling block (26) mates with said key (K) of said casing (12) in a sliding fit.

4) A means (200) for assembling or dismantling a casing (12) of a turbine to or from a base plate (10) as claimed in claim 1 or 3, wherein mating of said coupling block (26) with said key (K) of said casing (12) should be within the tolerance limits of 20 to 40 microns inclusively.

5) A means (200) for assembling or dismantling a casing (12) of a turbine to or from a base plate (10) as claimed in claim 1, wherein said support block (24) is coupled to said base plate (10) by means of welding.

6) A method for assembling a casing (12) of a turbine to a base plate (10), said method comprising the steps of :
a) tying said casing (12) on its both sides with ropes extending from a crane;
b) dropping said casing (12) slowly and mounting it on said base plate (10) at a predefined position with the help of workmen;
c) adapting to mate a key way slot (KS2) of a coupling block (26) with a key (K) of said casing (12) in such a way that a vertical block (V) of said coupling block (26) mounts on said base plate (10) and a horizontally extending block (HB) of said coupling block (26) mates with a support block (24) coupled to said base plate; and
d) locking of said horizontally extending block (HB) of said coupling block (26) and said support block (24) in position by means of a hexagonal bolt (28) and a pin (30).

7) A method for assembling a casing (12) of a turbine to a base plate (10) as claimed in claim 5, wherein development of lateral and shear loads between said key (K) of said casing (12) and said coupling block (26) while assembling is eliminated.

8) A method of dismantling a casing (12) of a turbine from a base plate (10), said method comprising the steps of :
a) unlocking a horizontally extending block (HB) of a coupling block (26) from a support block (24) through removal of a hexagonal bolt (28) and a pin (30);
b) pulling out of said coupling block (26) from a key (K) of said casing (12); and
c) lifting of said casing (12) from said base plate (10) through tying of ropes on its both sides extending from a crane.

9) A method for dismantling a casing (12) of a turbine from a base plate (10) as claimed in claim 7, wherein development of lateral and shear loads between said key (K) of said casing (12) and said coupling block (26) while dismantling is eliminated.
, Description:FIELD OF THE INVENTION:
The present invention relates to the field of an assembling or dismantling means and an assembling or dismantling method. Particularly, the present invention relates to a means and a method of assembling or dismantling a casing of a turbine to or from a base plate.

BACKGROUND OF THE INVENTION:
Figure 1(a) illustrates a front view of a casing of a turbine coupled to a base plate.

Figure 1(b) illustrates an enlarged view of portion A of figure 1(a) depicting a schematic assembling arrangement.

Figure 1(c) illustrates a top view of an assembling arrangement of figure 1(b).

According to the prior art, there is provided an assembling arrangement 100 comprising a base plate 10, a casing 12 and a block 14. The block 14 is provided with a key way slot KS1 therein, mounted and coupled to the base plate 10. The casing 12 of a turbine is provided with a key K complementary to the keyway slot KS1 of the block 14.

Typically, the block 14 is coupled to the base plate 10 through welding.

The conventional method of assembling or dismantling the casing 12 on or from the base plate 10 involves tying of the casing 12 on its both sides through ropes extending from a crane, dropping or lifting the casing 12 slowly respectively as per the requirement and holding of the casing 12 with the help of workmen on its both sides to avoid tilting of the casing 12 due to heavy weight and for positioning or pulling out of the casing 12 precisely on or from the base plate 10 such that the key K of the casing 12 sits inside or pulls out from the keyway slot KS1 of the block 14 respectively.

The activity of positioning or pulling out of the casing 12 on or from the base plate 10 involves development of lateral and shear loads between the key of the casing 12 and
the keyway slot KS1 of the block 14 which ultimately results in the deformation of the keyway slot KS1 of the block 14 or breakage of the weld of the block 14.

Therefore, there is felt a need for development of an assembling or dismantling means to overcome the drawbacks of the prior art and to provide a fool proof assembling or dismantling mechanism.

OBJECTS OF THE INVENTION:
An object of the present invention is to provide a simple and fool proof mechanism for assembling or dismantling a casing of a turbine to or from a base plate.

Another object of the present invention is to provide an assembling or dismantling means for easy assembly or removal of a casing of a turbine to or from a base plate.

One more object of the present invention is to eliminate development of lateral and shear loads while assembling or removal of a casing of a turbine to or from a base plate.

Still another object of the present invention is to provide an assembling or dismantling means which can replaced easily in case of damage due to wear and tear.

Further another object of the present invention is to provide an assembling or dismantling means which transfers less vibration to a base plate and in turn to foundation.

Still one more object of the present invention is to provide a sliding fit for coupling of casing of a turbine to a base plate.

Further one more object of the present invention is to reduce stress on the workmen while assembling or dismantling a casing of a turbine to or from a base plate.

SUMMARY OF THE INVENTION:
In accordance with the present invention a means (200) for assembling or dismantling a casing (12) of a turbine to or from a base plate (10) is provided, the means (200) comprising:
(i) a support block (24) with at least one hole (H1) for accommodating a hexagonal bolt (28) and at least one hole (H2) for accommodating a pin (30) are provided along the same axes and centerlines, the support block (24) coupled to the base plate (10) at a predefined position ; and
(ii) a coupling block (26) comprising a vertical block (V) integrally formed with a horizontally extending block (HB) proximal to its bottom end, the vertical block (V) provided with a key way slot (KS2) therein and the horizontally extending block (HB) provided with at least one hole (H3 and H4) symmetrical to the one hole (H1 and H2) of the support block (24), the key way slot (KS2) of the coupling block (26) adapted to mate with a key (K) of the casing (12) in such a way that the vertical block (V) mounts on the base plate (10) and the horizontally extending block (HB) mates with the support block (24) and locked in position by means of the hexagonal bolt (28) and the pin (30).

Typically, the combination of the hexagonal bolt (28) and the pin (30) facilitates in alignment of the horizontally extending block (HB) of the coupling block (26) with the support block (24) without any tilt.

Typically, the key way slot (KS2) of the coupling block (26) mates with the key (K) of the casing (12) in a sliding fit.

In accordance with the present invention a method of assembling a casing (12) of a turbine to a base plate (10) is provided, the method comprising the steps of:
(i) tying the casing (12) on its both sides with ropes extending from a crane;
(ii) dropping the casing (12) slowly and mounting it on the base plate (10) at a
predefined position with the help of workmen;
(iii) adapting to mate a key way slot (KS2) of a coupling block (26) with a key (K) of the casing (12) in such a way that a vertical block (V) of the coupling block (26) mounts on the base plate (10) and a horizontally extending block (HB) of the coupling block (26) mates with a support block (24) coupled to the base plate; and
(iv) locking of the horizontally extending block (HB) of the coupling block (26) and the support block (24) in position by means of a hexagonal bolt (28) and a pin (30).

In accordance with the present invention a method of dismantling a casing (12) of a turbine from a base plate (10) is provided, the method comprising the steps of:
(i) unlocking a horizontally extending block (HB) of a coupling block (26) from a support block (24) through removal of a hexagonal bolt (28) and a pin (30);
(ii) pulling out of the coupling block (26) from a key (K) of the casing (12); and
(iii) lifting of the casing (12) from the base plate (10) through tying of ropes on its both sides extending from a crane.

BRIEF DESCRIPTION OF THE DRAWINGS:
The invention will now be described with reference to the accompanying drawings in which:
Figure 1(a) illustrates a front view of a casing of a turbine coupled to a base plate according to the prior art;

Figure 1(b) illustrates an enlarged view of portion A of figure 1(a) depicting a schematic assembling arrangement;

Figure 1(c) illustrates a top view of an assembling arrangement of figure 1(b);

Figure 2(a) illustrates a front view of a casing of a turbine coupled to a base plate in accordance with the present invention;

Figure 2(b) illustrates an enlarged view of portion B of figure 2(a) depicting a schematic assembling or dismantling means; and

Figure 2(c) illustrates a top view of an assembling or dismantling means of figure 2(b).

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS:
A preferred embodiment will now be described in detail with reference to accompanying drawings. The preferred embodiment does not limit the scope and ambit of the invention. The description provided is purely by way of example and illustration.

Figure 2(a) illustrates a front view of a casing of a turbine coupled to a base plate.

Figure 2(b) illustrates an enlarged view of portion B of figure 2(a) depicting a schematic assembling or dismantling means.

Figure 2(c) illustrates a top view of an assembling or dismantling means of figure 2(b).

In accordance with the present invention, there is provided a means 200 for assembling or dismantling a casing 12 of a turbine to or from a base plate 10 comprising a support block 24, a coupling block 26, a plurality of hexagonal bolts 28 and a plurality of pins 30.

The support block 24 is provided with a plurality of holes H1 and a plurality of holes H2 to accommodate the plurality of hexagonal bolts 28 and the plurality of dowel pins 30 respectively. The plurality of holes H1 and the plurality of holes H2 are provided along same axes and centerlines as shown in the figure 2(c). Typically, the plurality of holes H1 of the support block 24 is threaded. The support block 24 is welded to the base plate 10 at a predefined position.

The coupling block 26 comprises a vertical block V integrally formed with a horizontally extending block HB proximal to its bottom end as shown in the figure 2(b). The vertical block V is provided with a key way slot KS2 therein. The horizontally extending block HB is complementary to the support block 24 and provided with a plurality of holes (H3 and H4) symmetrical to the plurality of holes (H1 and H2) of the support block 24 respectively.

The configuration and method of assembling or dismantling the casing 12 of a turbine to or from the base plate 10 in accordance with the present invention is as follows:

While assembly of a casing 12 of a turbine on to a base plate 10, the casing 12 of a turbine tied with ropes extending from a crane on its both sides is dropped slowly and adapted to mount at a predefined position on the base plate 10. The key way slot KS2
of the coupling block 26 is adapted to pass through the key K of the casing 12 in such a way that the vertical block V of the coupling block 26 mounts on the base plate 10
and the horizontally extending block HB of the coupling block 26 mates with the support block 24 and locked in position by means of a plurality of hexagonal bolts 28 and a plurality of pins 30 passing through the plurality of holes (H3 and H4) of the horizontally extending block HB respectively and the plurality of holes (H1 and H2) of the support block 24 respectively.

Typically, the combination of the plurality of hexagonal bolts 28 and the plurality of pins 30 facilitates in perfect alignment of the horizontally extending block HB of the coupling block 26 with the support block 24 without any tilt and thereby helps in achieving perfect fit in coupling the key K of the casing 12 with the key way slot KS2
of the coupling block 26.

Typically, the key way slot (KS2) of the coupling block (26) mates with the key (K) of the casing (12) in a sliding fit of 20 to 40 microns inclusively.

While dismantling a casing 12 of a turbine from a base plate 10, firstly, the plurality of hexagonal bolts 28 and the plurality of pins 30 are removed from the support block 24 and the horizontally extending block HB of the coupling block 26. Secondly, the coupling block 26 is pulled out from mating contact with the key K of the casing 12 and finally, the casing 12 of a turbine is in free position to be lifted from the base plate 10 with the help of ropes extending from a crane.

In both the cases of coupling or dismantling a casing 12 of a turbine to or from a base plate 10, the development of lateral and shear loads between the key K of the casing 12 and the coupling block 26 are completely eliminated.

TECHNICAL ADVANCEMENTS:
A means for assembling or dismantling a casing of a turbine to or from a base plate has several technical advantages including but not limited to the realization of:
• a simple and fool proof mechanism for assembling or dismantling a casing of a turbine to or from a base plate ;
• an assembling or dismantling means for easy assembly or removal of a casing of a turbine to or from a base plate ;
• a means to eliminate development of lateral and shear loads while assembling or removal of a casing of a turbine to or from a base plate ;
• an assembling or dismantling means that can replaced easily in case of damage due to wear and tear ;
• an assembling or dismantling means that transfers less vibration to a base plate and in turn to foundation ;
• a means to achieve a sliding fit in coupling of casing of a turbine to a base plate ; and
• a means to reduce stress on the workmen while assembling or dismantling a casing of a turbine to or from a base plate.

Although the invention has been described herein above with reference to the embodiments of the invention, the invention is not limited to the embodiments described herein above. It is to be understood that modifications and variations of the embodiments can be made without departing from the spirit and scope of the invention.