FIELD OF INVENTION
The present invention relates to a fixture for safe handling and transport of
emergency stop valve and control valve (ESV-CV) of 660mw steam turbine of a
thermal power plant.
BACKGROUND OF INVENTION
BHEL is going to commission its first 660MW supercritical plant, components of
which are new to BHEL. Emergency Stop valve and Control Valve (ESV-CV) is a
key component of this supercritical 660MW thermal power plant. The ESV-CV has
a weight of about 30 Tons. In order to transport this component to power plant
site, a handling and transport fixture is essential. As it is new component there is
no fixture available with BHEL to transport 660MW ESV CV. Hence there was a
need to design a new fixture for safe handling and transportation of ESV-CV for
660 MW steam turbines.

OBJECTS OF THE INVENTION
Therefore it is an object of the invention to propose a fixture for safe handling
and transport of emergency stop valve and control valve (ESV-CV) of 660 MW
steam turbine of a thermal power plant which is capable of handling the valve
safely and transport it to the power plant site without any damage.
Another object of the invention is to propose a fixture for safe handling and
transport of emergency valve and control valve (ESV-CV) of 660 MW steam
turbine of a thermal power plant which is capable of providing a proper seating
arrangement for ECV-CV so that delicate points on the valve do not come at
supporting locations.
A further object of the invention is to propose a fixture for safe handling and
transport of emergency stop valve and control valve (ESV-CV) of 660 MW steam
turbine of a thermal power plant which is able to reduce stress in fillet welds
between the crossing horizontal beams during lifting.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
Fig.1 - Shows the fixture for holding and transporting ESV-CV of 660MW
steam turbine according to invention.

Fig.2 - Shows the fixture holding the ESV-CV.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE
INVENTION
Main aspect that was considered during the design of transportation package
was to keep the orientation of valve similar as it is integrated in power plant to
avoid the difficult maneuverings before integration, because of which it was not
the easiest configuration for transportation.
The fixture is shown in Fig.1 and Fig.2 shows the fixture while holding ESV-CV.
Base of the transportation package/fixture is fabricated with ten numbers of I-
section beams using two channels for each I-section. A pair of opposite facing
channels are welded together to manufacture these I-section. Out of these ten
beams, bottom five beams (1) are parallel to each other in a horizontal plane,
forming the bottom deck and remaining five beams (2) are placed above bottom
deck in the horizontal plane and intersecting the bottom beams at 90°, forming
the upper deck. Lifting is done through two end beams of bottom deck. Three
vertical columns (3) are connected with I-sections of top deck. Height of these
columns is kept minimum to minimize moment at the fillet welds at the base of
columns. Location of columns is identified in such a way that no delicate
point of ESV-CV comes at their locations. Each column 3 contains three
vertical beams (4) and a horizontal beam /channel (5) is lying at

top of these three vertical beams (4). Bottom 10 beams are adjusted in such a
way that they fall just below the columns to support ESV-CV above these
columns. Wooden blocks (6) are fastened with this horizontal channels (5) with 4
numbers of M24 studs at every column and ESV-CV (7) sits over these wooden
blocks (6). These wooden blocks are having rectangular cross section, final
height of them (after stacking) is such a way that valve comes in required
horizontal position. Blocks are fastened with the channel with 4 number of M24
studs at every support location, which pass through all of the blocks and
channel. To provide rigidity to the vertical column in transverse direction
stiffeners (8) are provided.
A dual deck arrangement which consists of upper deck and lower deck (2) is
provided to avoid tensile stress on fillet welds, during lifting. The fixture is made
in such a way that ESV-CV valve sits on the fixture at three points in a horizontal
plane. ESV-CV valve is supported at the top of fixture (9) at the three points
which are in a horizontal plane. 5 beams are laid parallel to each other at bottom
and they form bottom deck, remaining 5 parallel beams are laid above bottom
beams perpendicular to them and they form top deck. Beams of bottom and top
beams are fillet welded at all the lines of intersection. As package is lifted
through two of the bottom beams and the three vertical columns which are
supporting the valve are connected to top deck, tensile stresses are avoided in
fillet welds during lifting. Heights of the vertical columns of fixture which are

forming the three supports for ESV-CV are different at three locations. Shorter
columns are having height 385-390mm and longer ones are having 685-690mm.
Horizontal channel above them are having length varying from 1600mm to
2000mm.

WE CLAIM
1. A fixture (9) for safe handling and transport of emergency stop valve and
control valve of 660MW steam turbine comprising;
a base (10) made of I-section beams;
a plurality of horizontal parallel beams (1); forming the upper deck of the
base (10)
a plurality of vertical beams (2) intersecting the horizontal beams at right
angle and forming the lower deck of the base (10)
a plurality of vertical columns (3) connecting the I-sections;
a plurality of stiffeners (8) provided for arresting the transverse movement
of vertical columns (3);
Characterized in that,
all beams (1, 2) are disposed in the fixture in such a way that they fall
just below the columns (3) to support them when each column (3)
containing three vertical beams (4) are connected on the top by a
horizontal beam (5) wherein
wooden blocks (6) are fastened with the horizontal beam/channel (5) for
accommodating the ESV-CV (7) sitting over the blocks (6) having
provision of three point support system.

2. A fixture as claimed in claim 1, wherein five horizontal parallel beams (1)
and five vertical beams (2) are disposed in the fixture.
3. A fixture as claimed in claim 1, wherein the height of the columns (3) is
kept in between 385 to 685 mm.
4. A fixture as claimed in claim 1, wherein the horizontal and vertical beams
(1, 2) are I-section beams where a pair of opposite facing channels are
welded together to form the I-section.