FIELD OF THE INVENTION
The present invention generally relates to the globe valves for high temperature
application. More particularly, the invention relates to an improved lower
temperature globe valve with cooler jacket adaptable to high temperature
applications.
BACKGROUND OF THE INVENTION
The existing lower temperature valves are designed to withstand a maximum
temperature of 540°C. It is costly to design valves which can withstand still
higher temperatures due to constraint on materials availability. Exotic materials
are to be developed for configurating the valve body, valve stem, valve disc
which can withstand temperature above 540°C. Such a valve therefore will be
cost ineffective to manufacture.
US Patent no. 4070747 discloses a high temperature valve in which a secondary
connection between a valve seat and a valve body in addition to the primary
connection of the secondary connection, has atleast one pin inserted through the
valve seat to pass into a recess in the body, and a weld securing the pin in the
valve seat.
US Patent No. 4161959 discloses a high temperature valve which regulates the
flow of high temperature, abrasive fluids. The valve is constructed primarily from
a combination of refractory and ceramic materials for use in regulating the flow
of gas and char particles encountered in a coal gasification process.
US Patent No. 4296776 discloses a gate valve which relates to high temperature
slide valve, especially hot-blast slide valve, comprising a water-cooled valve
casing atleast partially lined with refractory material and provided with a pair of
end flanges.
US Patent No. 4394023 discloses a high temperature valve which relates to a
gate valve for use in conduits or pipelines having large nominal diameters,
particularly large size hot air conduits.
US Patent No. 4010775 discloses a high temperature valve stem packing with
coiled graphite packing seal rings. The valve incorporates packing assemblies for
establishing a fluid tight seal between a valve body structure and a valve stem
for controlling an internal valve element.
All the prior art valves fail to suggest a globe valve which is susceptible to
temperature above 600°C but does not require use of super alloy material or
ceramic materials for its construction.
OBJECTS OF THE INVENTION
Accordingly, it is an objective of the present invention to provide an improved
low temperature globe valve with cooler jacket which is capable to withstand a
temperature above 540°C and high pressure.
Another object of the invention is to provide an improved low temperature globe
valve with cooler jacket which eliminates the high cost incurred on high
temperature globe valve made of super alloys.
An yet another object of the invention is to provide an improved low temperature
globe valve with cooler jacket which is simple and easy to manufacture.
A further object of the invention is to provide an improved low temperature
globe valve with cooler jacket which eliminates constituting components
comprising ceramic materials.
A still further object of the invention is to provide an improved low temperature
globe valve with cooler jacket which is cost - effective.
An yet further object of the invention is to provide an improved low temperature
globe valve with cooler jacket in which water is used as cooling media with
minimum consumption of power for circulation.
BRIEF SUMMARY OF THE INVENTION
The entire body of the proposed improved valve is wrapped with a cover leaving
a gap of 10 mm for the water to flow and to cool the bodv. The cover is made
up of a number of segments to suit the contour of the valve casting. The
segmented pieces are welded on a plurality of guide vanes and a leak tightness
is ensured. The guide vanes are provided on the body of the valve so that the
water passes through a passage which covers the entire surface. The cooling
passage is arranged in such a way that effective cooling is taken place without
any room for hot spots. The water enters at an inlet of the valve flange and cools
the flame and afterwards travels through the passages provided on the body and
cools the entire body before leaving. While passing through the circuit, the water
cools the body and in the process picks up heat. It is ensured that the inner
temperature of the body facing the hot flue gases did not exceed the allowable
metal temperature.
Similarly the stem and the disc of the valve is also cooled by a proper cooling
arrangement. The inlet and outlet stubs are welded to the stem. The inlet and
outlet openings are arranged on the stem in such a way that it satisfies the flow
requirements and will not obstruct the movement of the stem during operation.
The flow path in the stem is made possible by drilling atleast two holes, one for
the inlet and other for the outlet. The arrangement is made in such a way that
the disc, which will face high temperature is cooled effectively. Water enters
through the inlet and travels along the stem and enters the disc and cools it and
returns through the outlet opening. It is ensured that metal temperature did not
exceed the allowable limits. The rate of cooling water can be adjusted depending
On the requirement.
Since the cooling water picks up heat during cooling of the body and stem
minimal heat loss will be there.
Thermal stress analysis has been carried out and the results showed that the
valve is safe up to a temperature of 800CC.
The improved low temperature valve with cooler jacket capable of withstanding
high temperature find application in petrochemical industries, steel industries and
wind tunnel facilities etc.,
The invented improved valve can be used for high pressure and temperature
application. The valve is easy to manufacture and cost effective. The
temperature range is upto atleast 800°C. Water consumption is low. Water can
be recirculated. No wastage of water. Power consumption is minimum.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Figure 1 - shows a schematic diagram of an improved low temperature valve
body with cooler jacket according to the present invention.
Figure 2 - shows a schematic diagram of a modified stem and stud of the
improved valve according to the present invention.
Figure 3 - shows a line diagram of water circulation path catering for the task of
cooling both the body of the valve and stem stud of the valve.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF
THE INVENTION
As shown in Figure - 1, the improved valve consists of a body (01) having atleast
one flange (2) at both ends and, a movable adjuster stem and stud fastened on
the body (01) with a middle opening (3). The entire body (01) is wrapped with a
cover (4) leaving a gap (5) for water circulation to cool the body. The cover (4)
is made up of a number of segments to suit the contour of the valve body (01).
The segmented pieces are welded on a plurality of guide vanes (6), through
which water flows covering the entire inner space of the gap (5). The cooling
Figure 3 - Flow of cooling water to the valve body (1), and the flange (12) is
catered from a first channel (18) through a cooling water inlet header (17) via a
first stop valve (19). A first pressure gauge (20) and a first temperature gauge
(21) is placed on incoming water line of the flange (12) and the valve body (1).
The exit water from the body (1) passes through a second pressure gauge (22)
and a second temperature gauge (23) and enters into a first flow meter (34) for
counting amount of water utilization. The exit water from the first flow meter
(34) enters into a cooling water outlet header (25) via a second stop valve (24).
Similarly, the inflow cooling water of the stem (10) is catered through a second
channel (26) of the cooling water inlet header (17). The incoming water passes
through a third pressure gauge (28) and a third temperature (29) via a third stop
valve (27) enters into the stem (10) and exit water from the stem (10) enters
into the disc (11) and then passes into next stem (10). The exit water from the
stem (10) after passing through a second flow meter (32) and a third stop valve
(33) enters into the cooling water outlet header (27). A fourth pressure gauge
(30) and a fourth temperature gauge (31) each is installed on a line between the
stem (10) and the fourth flow meter (32) to measure the pressure and
temperature of outlet water.
WE CLAIM
1. An improved water cooled globe valve with cooler jacket adapatable to high
temperature usages comprising:-
- a body (1) having at least one flange (2) at both ends covered with a
metallic jacket (4) maintaining a gap (5) between the body (1) and the
jacket (4) for passage of water flow into an internal space of the gap
(5), a plurality of vanes (6) being configured on the body (1) through
which the water circulation quenches the entire outside surface of the
valve body (1), the cooling water entering the jacket (4) through an
inlet (8) and after passing vi the gap (5) leaves the jacket (4) through
an outlet (9); and
- a stem (10) and a disc (11) mounted rigidly on the body (1) at a
middle opening (3) to regulate and adjust the flow media passing
through the valve, the upward and downward movement of the stem
(10) being controlled by a screw and thread means through clockwise
movement causing downward movement of the stem (10), and via an
anticlockwise movement activating an upward movement of the stem
(10).
Characterized in that the globe valve can be able to perform duel activity such as
applicable both in low temperature fluid flow as well as high temperature (above
540°C) fluid flow without any performance failure.
2. A cooling water supply,distribution and discharging device for cooling the
improved valve as claimed in claim 1, comprising, a cooling water inlet
header(17), a cooling water outlet header(25); at least two channels (18,
26), the first channel (18) provided with a plurality of stop valves (19,27),
a plurality of pressure gauges (20, 28) and temperature gauges (21, 29)
to control the water flow through a first flow meter (34) for achieving
required pressure of water and to monitor the temperature of incoming
water from the cooling water inlet head (17) for entry into the cooler
jacket (4) for cooling, the second channel (26) provided with a plurality of
pressure gauges (22, 30), a several temperature gauges (23, 31), a
second flow meter (32) and a number of stop valves (24, 33) for the
water exiting the cooler jacket (4) and finally being discharged through
the cooling water outlet header (25).
3. An improved low temperature valve with cooler jacket substantially
described and illustrated herein with reference to the accompanying
drawings.

An improved water cooled globe valve with cooler jacket adapatable to high temperature usages comprising:-
- a body (1) having at least one flange (2) at both ends covered with a metallic jacket (4) maintaining a gap (5) between the body (1) and the jacket (4) for passage of water flow into an internal space of the gap (5), a plurality of vanes (6) being configured on the body (1) through which the water circulation quenches the entire outside surface of the
valve body (1), the cooling water entering the jacket (4) through an inlet (8) and after passing vi the gap (5) leaves the jacket (4) through an outlet (9); and
- a stem (10) and a disc (11) mounted rigidly on the body (1) at a middle opening (3) to regulate and adjust the flow media passing
through the valve, the upward and downward movement of the stem (10) being controlled by a screw and thread means through clockwise
movement causing downward movement of the stem (10), and via an anticlockwise movement activating an upward movement of the stem
(10). Characterized in that the globe valve can be able to perform duel activity such as applicable both in low temperature fluid flow as well as high temperature (above 540°C) fluid flow without any performance failure.