FIELD OF INVENTION
The present invention relates to a fixture for safe transport of Intercepter
valve (IV) and control valve (CV) of 660MW Steam turbine.
BACKGROUND OF THE OPERATION
IV & CV is the key component of the Thermal Power Plant operating with
660MW steam turbine. The IV & CV assembly along with Stop and Control Valves
has a weight of about 45 Tons and dimensions of 5.7 m x 4.2 m x 2.8 m. BHEL
manufactures and supplies 660MW steam turbines.
In recent past many steam turbine module toppled during road
transportation and BHEL has faced huge monetary losses due to this. With huge
weight of subject assembly and limitation of support location due to complexity
of the product, the transportation fixture should be safe from strength point of
view for carrying the component with Indian road conditions. Hence there was a
need to design a new fixture for safe transportation of IV & CV for 660MW
capacity steam turbines.
OBJECTS OF THE INVENTION
Therefore, it is an object of the invention to propose a fixture for safe
transport of Intercepter valve (IV) and control valve (CV) of 660MW Steam
turbine which is capable of carrying the entire weight of the IV & CV
during transportation and storage.

Another object of the invention is to propose a fixture for safe transport
of Intercepter valve (IV) and control valve (CV) of 660MW Steam turbine
which provides the facility for the complete package to be easily lifted with
the lifting arrangement itself in the structure.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Fig. 1 : Detailed drawing of the fixture for safe road transport of IV & CV of
660MW Steam Turbine.
Fig. 2 : Details of Wooden necks and Covers used in the fixture.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE
INVENTION
Base of the transportation package has been fabricated of square beams (2)
using two channels for each square beam. These square beams are
crossconnected with square beams (3) to make the base complete. Further
six vertical channels (4 & 5) have been welded to the base (B) for supporting
the entire weight of IV & CV. To prevent the axial and lateral movement
wooden neck supported by channels in two perpendicular directions have
been envisaged. The IV & CV (1) is seated on three semi-circular wooden
blocks placed in the two pockets fabricated on the top of the vertical
channels. Cover (6) has been provided for the protection of inlet and outlet
end of IV & CV during transportation and storage at site.

The device called fixture for safe road transport of IV & CV of 660MW
Steam Turbine designed as a fabricated steel structure. Base of the Fixture
has been formed by four channels and a number of fabricated vertical
channels have been used for load transfer. Height of the package has been
optimized for better stability. Cross angles has been used for enhanced
rigidity of the structure. The fixture has a flat base formed by a number of
fabricated box channels in transverse direction connected by longitudinal
channels and a number of fabricated vertical beams for load transfer. Already
available contours of IVCV have been used for fixing it with transportation
package. Fixture has been designed in such a way that complete package can
be easily lifted with the provided lifting arrangement itself in the structure.
The design of fixture has been developed and optimized using Finite Element
Analysis technique.

We Claim:
1. A fixture for safe transport of Intercepter valve (IV) and control valve (CV)
of 660MW Steam turbine comprising;
a base of fabricated square beams (2), each of the said square beams (2)
consists of plurality of channels; when a plurality of square beams (3) are cross
connected with the fabricated square beams (2) for making the base (B) of the
fixture wherein a plurality of vertical channels (4 & 5) are welded to the base (B)
for supporting the entire weight of the IV & CV when wooden neck supported by
channels in two perpendicular directions are disposed for preventing axial and
lateral movement when three semi-circular wooden blocks are disposed in the
two pockets fabricated on the top of the vertical channels for seating of
intercepter valve and control valve (1) wherein a cover (6) is provided for the
protection of inlet and outlet end of IV and CV during transportation and storage
at site.
2. The fixture as claimed in claim 1, wherein each square beams (2) are
fabricated with two channels.
3. The fixture as claimed in claim 1, wherein six vertical channels (4,5) are
welded to the base for supporting the entire weight of the IV & CV.

ABSTRACT

The fixture for safe road transport of intercepter valve (IV) and control
valve (CV) of 660MW steam turbine has a base (B) which is fabricated with
square beams (2) using two channels for each of the square beams (2). These
square beams (2) are cross connected with square beams (3) to make the base
complete. Six vertical channels(4,5) have been welded to the base (B) for
supporting the entire weight of IV & CV. Wooden neck supported by channels in
two perpendicular directions are provided to prevent axial and lateral movement.
Three semi-circular wooden blocks are disposed in the two pockets fabricated on
the top of the vertical channels for the seating of IV and CV during
transportation and storage at site.