Abstrict The height of the valve with a flow meter shall be as small as
possible, enabling it to be mounted in restricted spaces. In order
to achieve this, all adjusting and display movements are not executed
axial but on the contrary polar. The rotating spindle of the valve
is designed as rotary slide valve and the display marker or the
graduation of the display unit of the flow rate meter is present
on a rotating bush. The total height of the valve with a flow meter
is accordingly low and unchangeable.
Claims We claim:
1. A flow control valve with a flow meter, including
a housing having a conduit section;
a transverse tube which extends perpendicularly to said conduit
section;
a rotating spindle arranged coaxially to said transverse tube and
supported in said housing, which rotating spindle has a bore which
is closed against the surroundings and extends through the spindle;
a position display bar which projects into said bore and has a
spring supporting area;
a helical spring which is inserted between said spring supporting
area and a spring support of the rotating spindle, which helical
spring is adapted to determine an indicating position of said position
display bar;
a valve closure body part adapted to be shut in an end position
by means of said rotating spindle;
a flow receiving member located in said transverse tube and biased
by said helical spring into a home position and adapted to be axially
displaceable by a flow occurring in the conduit section; which rotating
spindle has a transparent portion;
a display unit including a graduation and a marker, so that a respective
position of said flow receiving member displayed by the graduation
and marker is readable from the outside through said transparent
portion;
which transverse tube projects radially into said conduit section
and supports said rotating spindle and said valve closure body which
valve closure body is adapted to directly open and close an outlet
port of the transverse tube upon a rotating movement of said rotating
spindle;
which flow receiving member and which position display bar are
guided in said valve closure body to be together axially displaceable;
in which said rotating spindle is designed as a rotary slide valve
of which the valve closure body comprises a control edge which is
rotatable and is arranged at the transverse tube; which transverse
tube has a port in its wall of which an edge forms a valve seat;
and in which said position display bar is guided against a rotation
relative to said rotating spindle and is coupled to a rotating bush
in such a manner that an axial movement of said position display
bar is converted into a rotary movement of said rotating bush, which
rotating bush carries a part of said position display unit.
2. The flow control valve of claim 1 comprising a means for a
converting of a movement, which converting means is arranged between
said position display bar and said rotating bush, and which converting
means includes at least one sliding bar groove and at least one
sliding bar guided for a movement in said sliding bar groove, which
sliding bar groove is of a helical shape.
3. The flow control valve of claim 2 comprising two sliding bar
grooves located diametrically opposite of each other, and comprising
two sliding bars.
4. The flow control valve of claim 1 in which said rotating bush
has a planar surface area including said marker, and in which said
rotary slide valve has a further planar surface area supporting
the graduation of said position display unit.
5. The flow control valve of claim 4 in which said housing has
a planar surface area which includes a symbol carrier, further in
which said rotary slide valve includes a further, second marker
cooperating with said symbol carrier, and in which the three planar
surface areas of the rotating bush, the rotary slide valve and the
housing extend parallel to each other.
6. The flow control valve of claim 1 in which said position display
bar is guided against rotation in said rotating spindle by means
of an axial key-and-slot guiding arrangement.
7. The flow control valve of claim 5 in which said symbol carrier
comprises symbols for an indication of the valve being open by 1/4
1/2 3/4 4/4 and 0 which 0-position indicates a leakage-proof
position of the rotary slide valve.
8. The valve of claim 7 in which said symbol carrier carries an
additional symbol which indicates the begin of the opening of the
valve.
Description BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a flow control valve with a flow
meter, with a housing having a conduit section, a transverse tube
which extends perpendicularly to the conduit section, a rotating
spindle arranged coaxially to the transverse tube and supported
in the housing, which rotating spindle has a bore which is closed
against the surroundings and extends through the spindle, a position
control bar which projects into the bore and has a spring supporting
area, a helical spring which is inserted between the spring supporting
area and a spring support of the rotating spindle, which helical
spring is adapted to determine an indicating position of the position
display bar, a valve closure body adapted to be shut in an end position
by means of the rotating spindle, a flow receiving member located
in the transverse tube and biased by the helical spring into a home
position and adapted to be axially displaceable by a flow occurring
in the conduit section, which rotating spindle has a transparent
portion, a position display unit including a graduation and a marker,
so that a respective position of the flow receiving member displayed
by the graduation and marker is readable from the outside through
the transparent portion, which transverse tube projects radially
into the conduit section and the rotating spindle and the valve
closure body which valve closure body is adapted to directly open
and close an outlet port of the transverse tube upon a rotating
movement of the rotating spindle, which flow receiving member and
which position control bar are guided in the valve closure body
to be together axially displaceable.
2. Description of the Prior Art
A flow control valve with a flow meter of the kind mentioned above
is disclosed in the DE-PS 35 09 718. This control valve occupies
a rather large space when installed and the definition of its position
display unit is limited.
SUMMARY OF THE INVENTION
Hence, it is a general object of the present invention to provide
a flow control valve with a flow meter of which the structural length
is reduced and at the same time an increased definition of the position
display unit is arrived at, thus has a longer scale. A shorter structural
length of the flow control valve with a flow meter, i.e. the length
of the extent in the direction of the position display bar and also
an increased definition of the position display unit are quite desirable
in practical applications, because on the one hand the flow control
valve with a flow meter can be used also in restricted spaces and
on the other hand a reading of the measured flow rate is more precise
and more easy.
A further object of the invention is to provide a flow control
valve with a flow meter, in which the rotating spindle is designed
as a rotary slide valve of which the valve closure body has a control
edge which is rotatable and is arranged at the transverse tube,
which transverse tube has a port in its wall of which the edge forms
the valve seat, and in which the position display bar is guided
against a rotation relative to the rotating spindle and is connected
to a rotating bush in such a manner that an axial movement of the
position display bar is converted into a rotary movement of the
rotating bush, which rotating bush carries a part of the position
display unit.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood and objects other than
those set forth above will become apparent when consideration is
given to the following detailed description thereof. Such description
makes reference to the annexed drawings, wherein:
FIG. 1 is a longitudinal section through a flow control valve with
a flow meter;
FIG. 2 is a side view of the outlet stub of the housing of the
valve seen in the direction of the arrow A in FIG. 1 and
FIG. 3 is a top view of the flow control valve with a flow meter.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Below, the design of the valve will be explained. The housing includes
the two housing parts 1 and 2 which are screwed together by a screw
thread 3. The housing part 1 has an inlet stub 4 and an outlet stub
5. The flow through the housing proceeds in the direction of the
arrows 6. Thus, the stubs 4 5 form the conduit section of the housing.
A transverse tube 7 extends radially to this conduit section, which
transverse tube is a part of the housing. At the inlet side of the
housing 1 to 5 the transverse tube 7 includes a port 8. At its outlet
side the transverse tube 7 has a port 10 of which the edge 9 forms
a valve seat. The housing part 2 with the thread 3 is designed as
a cap screw which includes on a planar surface area a symbol carrier
11.
Now, the flow meter of the subject of the invention will be explained.
A rotating spindle 12 is supported for rotation and in a sealed
manner in the transverse tube 7. The rotating spindle 12 consists
in turn of two parts and includes a in FIG. 1 crosshatched lower
part 13 and an upper part 14 consisting of a transparent material.
The two parts 13 and 14 are locked against rotation relative to
each other by a form-locked connection, e.g. a serration 15. A sealing
ring 16 seals between the two parts 13 and 14 and the rotating
spindle 12 is sealed in the transverse tube 7 by two sealing rings
17 and 18. The rotating spindle 12 has a bore 19 which is closed
off against the surroundings.
An axially displaceable position display bar 20 extends coaxially
to the axis of the rotating spindle 12. A plate-like flow receiving
member 21 is mounted to the bottom of the position display bar 20.
It is located at a radial distance inside of the rotating spindle
12. A compression spring 22 is present, which spring 22 rests at
one end against a spring supporting area 23 of the flow receiving
member 21. At its opposite end the spring 22 rests against a spring
support 24 of the rotating spindle 12. The position display bar
20 is guided in the rotating spindle 12 for an axial movement but
against rotating therein. For this reason the inner circumferential
surface of the rotating spindle 12 is equipped with two longitudinal
ribs 25 (key) located diametrically opposite of each other, and
which project into two not specifically illustrated recesses (slot)
of the flow receiving member 21 arranged also diametrically opposite
of each other, so that the flow receiving member 21 is guided by
these ribs 25 against rotation but is axially displaceable. The
crosshatched part 13 of the rotating spindle 12 illustrated in FIG.
1 consists e.g. of Teflon (PTFE).
In order to solve the stated object the rotating spindle 12 is
designed as a rotary slide valve of which the valve closure body
includes a control edge 26 which cooperates with the valve seat
9 at the outlet stub 5 and accordingly controls the outlet aperture
(FIG. 2). The position display bar 20 has at its upper end two sliding
bars 27 located diametrically opposite of each other. The position
display bar 20 is coupled for movement to a rotating bush 28 in
such a manner that the axial movement of the position display bar
20 is converted into a rotary movement of the rotating bush 28.
To this end the rotating bush 28 includes two helical sliding bar
grooves 29 each receiving a displaceably guided sliding bar 27
therein. A plate 30 with a journal pin 31 is located on top of the
rotating bush 28 and the parts 30 31 can again consist of Teflon.
The plate 30 carries a marker 32 which acts as pointer (FIG. 3).
The transparent rotary slide valve part 14 carries on its planar
surface area a graduation illustrated in FIG. 3 whereby the marker
32 indicates a flow rate of about 3.8 liters per minute. The rotary
slide valve part 14 has additionally a second marker 33 on its surface
which is structured as an axial notch and is located in FIG. 3 at
the symbol "2" of the scale 11. The planar surface area
of the rotating bush 28 which carries the marker 32 the uppermost
located planar surface area of the transparent part 14 of the rotary
slide valve and the planar surface area of the symbol carrier 11
extend parallel to each other.
Accordingly, two markers 32 and 33 and two graduations are visible
in FIG. 3 whereby one is located on the rotary slide valve part
14 and the other graduation is located on the symbol carrier 11.
The display unit 14 32 indicates a flow rate through the valve
in liters per minute. The other display unit 11 33 indicates how
much the valve is open. The symbol carrier 11 indicates by the symbol
"1":1/4 open, by the symbol "2":1/2 open, by
the symbol "3":3/4 open and by the symbol "4":4/4
open. Furthermore, the symbol "0" indicates a leakage-proof
position of the rotary slide valve. The symbol carrier 11 carries
also an additional symbol which is illustrated by the dot 34 and
indicates the start of the opening of the valve.
In FIG. 1 at the top a closure cap 35 of the valve is illustrated
in two different positions. At the right side of the figure the
closure cap 35 is in its operating position, i.e. it is located
with a cam 36 in a detent groove of the housing such that the rotating
spindle 12 (rotary slide valve) cannot be rotated. A threaded portion
37 forms a plug connection between the closure cap 35 and the rotating
spindle 12. At the left side of FIG. 1 the closure cap is in an
inverted position 35' and serves as handle allowing a rotating of
the rotating spindle 12.
The display unit 11 33 illustrated in FIG. 3 serves for the setting
of the desired opening rate of the valve 9 26 (FIG. 2), thus for
the setting of the flow rate cross-section 10. If one desires to
change the flow rate, one can decide, whether the flow rate cross-section
of the valve shall be adjusted or whether the pumping pressure should
be adjusted.
Because the rotating spindle is designed as rotary slide valve
its rotating will not cause a changing of the height of the valve.
Since also the axial movement of the position display bar is converted
by the rotating bush into a rotating movement, no axial increase
of the dimension of the subject of the invention occurs. Further,
because all display arrangements are located on planar surface areas,
lateral relative to the direction of the height of the subject of
the invention, they too do not increase the total height of the
subject of the invention, and furthermore, the graduations can be
vastly stretched along their circular path and can give a distinct
display.
The subject of the invention may be used for a controlling of the
flow rate of liquids in various fields of application, such as for
instance for hot-water heating plants, in the food industry, in
the chemical industry and in agricultural applications.
While there is shown and described a present preferred embodiment
of the invention, it is to be distinctly understood that the invention
is not limited thereto, but may be otherwise variously embodied
and practiced within the scope of the following claims. |