WO2009006893A1 - A control valve - Google Patents

A control valve Download PDF

Info

Publication number
WO2009006893A1
WO2009006893A1 PCT/DK2008/000181 DK2008000181W WO2009006893A1 WO 2009006893 A1 WO2009006893 A1 WO 2009006893A1 DK 2008000181 W DK2008000181 W DK 2008000181W WO 2009006893 A1 WO2009006893 A1 WO 2009006893A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
valve element
presetting
valve
control valve
Prior art date
Application number
PCT/DK2008/000181
Other languages
French (fr)
Inventor
Ole Jorgensen
Original Assignee
Frese A/S
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Frese A/S filed Critical Frese A/S
Publication of WO2009006893A1 publication Critical patent/WO2009006893A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/04—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor
    • F16K5/0407—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor with particular plug arrangements, e.g. particular shape or built-in means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F16K5/10—Means for additional adjustment of the rate of flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F16K5/12—Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/028—Controlling a pressure difference
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/04—Control of fluid pressure without auxiliary power
    • G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
    • G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
    • G05D16/0644—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator
    • G05D16/0655—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator using one spring-loaded membrane
    • G05D16/0661—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator using one spring-loaded membrane characterised by the loading mechanisms of the membrane

Definitions

  • the present invention relates to a control valve, where the valve may be set for a flow which is kept constant independent of pressure changes in the system in which the valve is incorporated.
  • control valve may advantageously be used in liquid-borne systems, such as for instance in central or district heating systems, but generally everywhere where it is desired to have a presettable valve which keeps the flowing amount of liquid constant.
  • valve of Self An example of a valve which is described in the known literature, may be found in GB1164237 (Self), in the valve of Self, the flow of liquid is controlled by means of a rotary knob connected with a channel which may be pushed into and out of the liquid flow channel in the valve.
  • the valve of Self makes it possible to control the amount of liquid which flows through the valve. If, however, changes occur in the pressure in the system in which the valve is incorporated, it will no longer be possible to count on the preset amount of liquid.
  • valve of Yokoyama is a constant flow valve, where it is attempted to keep the flow of liquid at a constant level.
  • the valve comprises a spindle.
  • the present invention remedies the problems of the most immediate prior art by providing a control valve, where the flow through the valve may be kept constant independent of unforeseen pressure changes.
  • the invention relates to a control valve for use in liquid-borne systems, such as for instance central or district heating systems or other systems, in which there is a need for presetting the flow of liquid to a constant level which does not change, even if unforeseen pressure changes in the system take place.
  • the control valve comprises a valve housing in which a differential pressure regulator and a presetting device are arranged.
  • the differential pressure regulator maintains a constant differential pressure between the inlet side and the outlet side by means of a spring force.
  • the presetting device is used for the presetting of the flowing amount of liquid and comprises a rotary grip, a spindle, an outer cylindrical valve element and an inner valve element.
  • the outer valve element has a slit through which the liquid may flow.
  • the inner valve element is disposed in the cylindrical valve element and has a lower skirt of curve shape. Further, the valve element is connected with the rotary grip by means of the spindle, so that the opening in the presetting may be changed by rotation of the rotary knob.
  • the presetting device When the presetting device is provided with indications on the rotary grip, the flowing amount of liquid may be observed at a given position of the ro- tary grip.
  • the presetting device When the presetting device is disposed on an axis having an acute angle relative to the flow channel, stress in the valve is reduced, and, together with the skirt of the inner valve member, an effective presetting device is achieved.
  • fig. 1 shows a control valve
  • fig. 2 shows the individual valve components separated.
  • the control valve comprises a valve housing 2, in which a differential pressure regulator 3 and a presetting device are arranged.
  • the flow of liquid takes place in the flow channel which connects the inlet side, where the liquid runs into the valve, with the outlet side, where the liquid runs out of the valve.
  • the presetting device comprises a rotary grip 14, a spindle 9, an outer cylindrical valve element 6 and an inner valve element 7.
  • the outer valve element 6 has a slit through which the liquid may flow.
  • the inner valve element 7 is positioned in the cylindrical valve element 6 and has a lower skirt 8.
  • the skirt 8 imparts a curved shape to the lower part of the inner valve ele- ment 7, so that the length of the valve element will have an angular dependence.
  • the inner valve element 7 When the inner valve element 7 is disposed in the outer one 6, it may be rotated about its own axis.
  • the inner and outer valve elements cooperate such that when the inner valve element 7 is rotated, the skirt 8 will be rotated and open or close the slit in the outer valve element 6.
  • the rotation may take place continuously between the closed and opened outer positions.
  • the inner valve element 7 is connected with the rotary grip 14 by means of the spindle 9. This means that the setting of the flowing amount of liquid takes place by rotation of the rotary grip.
  • the presetting device has indications on the rotary grip which show the flowing amount of liquid at a given position of the rotary grip.
  • the indications may consist of one or more straight lines on the rotary grip in combination with figures or symbols on the valve housing.
  • valve it is possible to have indications on the valve, as, from the outset, it is independent of unforeseen pressure changes, so that the amount of liquid to which the rotary grip is rotated, may be counted on precisely.
  • the presetting device and the differential pressure regulator are seated on the same axis opposite each other.
  • the axis is inclined relative to the flow channel which connects the inlet side and the outlet side.
  • the differential pressure regulator 3 comprises a pipe connection and a spring.
  • the pipe connection transfers the pressure in the flow channel to the differential pressure regulator.
  • a control valve comprising a differential pressure regulator, a balance emerges between the inlet pressure and the outlet pressure plus a spring force, so that the differential pressure corresponds to the spring force. With a given spring force, this differential pressure will therefore be constant.
  • the differential pressure regulator and the presetting device surprisingly ensure that the amount of liquid flow to which the valve is preset, will be maintained during the entire operation of the valve. Even in case of externally produced pressure changes in the system in which the valve operates, the amount of liquid will be kept at a constant flow.

Abstract

A control valve for use in liquid-borne systems, such as for instance central or district heating systems or other systems where there is a need for presetting the flow of liquid to a constant level, which does not change even if unforeseen pressure changes occur in the system. The control valve comprises a valve housing (2) in which a differential pressure regulator (3) and a presetting device are disposed. The differential pressure regulator (3) maintains a constant differential pressure between the inlet side and the outlet side by means of a spring force. The presetting device is used for presetting the flowing amount of liquid and comprises a rotary grip (14), a spindle (9), an outer cylindrical valve element (6) and an inner valve element (7). The outer valve element (6) has a slit through which the liquid may flow. The inner valve element (7) is disposed in the cylindrical valve element (6) and has a lower skirt of curve shape (8). Further, the valve element (7) is connected with the rotary grip (14) by means of the spindle (9), so that the opening of the presetting may be changed by rotation of the rotary knob.

Description

A CONTROL VALVE
The prior art
The present invention relates to a control valve, where the valve may be set for a flow which is kept constant independent of pressure changes in the system in which the valve is incorporated.
The control valve may advantageously be used in liquid-borne systems, such as for instance in central or district heating systems, but generally everywhere where it is desired to have a presettable valve which keeps the flowing amount of liquid constant.
An example of a valve which is described in the known literature, may be found in GB1164237 (Self), in the valve of Self, the flow of liquid is controlled by means of a rotary knob connected with a channel which may be pushed into and out of the liquid flow channel in the valve.
Thus, the valve of Self makes it possible to control the amount of liquid which flows through the valve. If, however, changes occur in the pressure in the system in which the valve is incorporated, it will no longer be possible to count on the preset amount of liquid.
Another example of a valve which is described in the known literature, may be found in US5174332 (Yokoyama). The valve of Yokoyama is a constant flow valve, where it is attempted to keep the flow of liquid at a constant level. The valve comprises a spindle.
Like with the other known valves, it is not possible to ensure with the valve of Yokoyama that the flowing amount of liquid is kept at a constant level, even if pressure changes in the system take place. Thus, no control valve is available, where the flow through the valve may be kept constant independent of unforeseen pressure changes.
The object of the invention
The present invention remedies the problems of the most immediate prior art by providing a control valve, where the flow through the valve may be kept constant independent of unforeseen pressure changes.
Thus, the invention relates to a control valve for use in liquid-borne systems, such as for instance central or district heating systems or other systems, in which there is a need for presetting the flow of liquid to a constant level which does not change, even if unforeseen pressure changes in the system take place. The control valve comprises a valve housing in which a differential pressure regulator and a presetting device are arranged. The differential pressure regulator maintains a constant differential pressure between the inlet side and the outlet side by means of a spring force.
The presetting device is used for the presetting of the flowing amount of liquid and comprises a rotary grip, a spindle, an outer cylindrical valve element and an inner valve element. The outer valve element has a slit through which the liquid may flow. The inner valve element is disposed in the cylindrical valve element and has a lower skirt of curve shape. Further, the valve element is connected with the rotary grip by means of the spindle, so that the opening in the presetting may be changed by rotation of the rotary knob.
When the presetting device is provided with indications on the rotary grip, the flowing amount of liquid may be observed at a given position of the ro- tary grip. When the presetting device is disposed on an axis having an acute angle relative to the flow channel, stress in the valve is reduced, and, together with the skirt of the inner valve member, an effective presetting device is achieved.
The drawing
Exemplary embodiments of the invention will be explained more fully below with reference to the drawing, in which
fig. 1 shows a control valve, and
fig. 2 shows the individual valve components separated.
Description of the exemplary embodiments
With reference to fig. 1 , a cross-section of the control valve is shown. The control valve comprises a valve housing 2, in which a differential pressure regulator 3 and a presetting device are arranged.
The flow of liquid takes place in the flow channel which connects the inlet side, where the liquid runs into the valve, with the outlet side, where the liquid runs out of the valve.
The presetting device comprises a rotary grip 14, a spindle 9, an outer cylindrical valve element 6 and an inner valve element 7. The outer valve element 6 has a slit through which the liquid may flow. The inner valve element 7 is positioned in the cylindrical valve element 6 and has a lower skirt 8.
The skirt 8 imparts a curved shape to the lower part of the inner valve ele- ment 7, so that the length of the valve element will have an angular dependence.
When the inner valve element 7 is disposed in the outer one 6, it may be rotated about its own axis.
The inner and outer valve elements cooperate such that when the inner valve element 7 is rotated, the skirt 8 will be rotated and open or close the slit in the outer valve element 6. The rotation may take place continuously between the closed and opened outer positions.
The inner valve element 7 is connected with the rotary grip 14 by means of the spindle 9. This means that the setting of the flowing amount of liquid takes place by rotation of the rotary grip.
The presetting device has indications on the rotary grip which show the flowing amount of liquid at a given position of the rotary grip. For instance, the indications may consist of one or more straight lines on the rotary grip in combination with figures or symbols on the valve housing. <
It is possible to have indications on the valve, as, from the outset, it is independent of unforeseen pressure changes, so that the amount of liquid to which the rotary grip is rotated, may be counted on precisely.
The presetting device and the differential pressure regulator are seated on the same axis opposite each other. The axis is inclined relative to the flow channel which connects the inlet side and the outlet side.
The differential pressure regulator 3 comprises a pipe connection and a spring. The pipe connection transfers the pressure in the flow channel to the differential pressure regulator. In a control valve comprising a differential pressure regulator, a balance emerges between the inlet pressure and the outlet pressure plus a spring force, so that the differential pressure corresponds to the spring force. With a given spring force, this differential pressure will therefore be constant.
The differential pressure regulator and the presetting device surprisingly ensure that the amount of liquid flow to which the valve is preset, will be maintained during the entire operation of the valve. Even in case of externally produced pressure changes in the system in which the valve operates, the amount of liquid will be kept at a constant flow.

Claims

PATENT CLAIMS
1. A control valve for use in liquid-borne systems, said control valve comprising:
a valve housing (2) having an inlet side and an outlet side connected with a flow channel;
a differential pressure regulator (3) for maintaining a constant differential pressure between the inlet side and the outlet side;
a presetting device for presetting the flowing amount of liquid,
characterized in that the presetting device comprises: a rotary grip (14); a spindle (9); an outer cylindrical valve element (6) having a slit; an inner valve element (7), which is disposed in the cylindrical valve element (6), and which has a lower skirt of curve shape (8), said inner valve element (7) being connected with the rotary grip (14) by means of the spindle (9), so that the opening of the presetting may changed by rotation of the rotary grip (14).
2. A control valve according to claim 1, cha racte rized in that the presetting device has indications on the rotary grip (14), which show the flowing amount of liquid at a given position of the rotary grip (14).
3. A control valve according to claim 1, cha racte rized in that the presetting device is disposed on an axis having an acute angle relative to the flow channel.
PCT/DK2008/000181 2007-07-06 2008-05-16 A control valve WO2009006893A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200700999 2007-07-06
DK200700999A DK176638B1 (en) 2007-07-06 2007-07-06 Control valve

Publications (1)

Publication Number Publication Date
WO2009006893A1 true WO2009006893A1 (en) 2009-01-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2008/000181 WO2009006893A1 (en) 2007-07-06 2008-05-16 A control valve

Country Status (2)

Country Link
DK (1) DK176638B1 (en)
WO (1) WO2009006893A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013007633A1 (en) * 2011-07-08 2013-01-17 Flowcon International A/S A valve
WO2013139453A3 (en) * 2012-03-22 2013-11-14 Fratelli Pettinaroli S.P.A. Automatic balancing ball valve
CZ304426B6 (en) * 2009-04-27 2014-04-30 Hennlich Industrietechnik, Spol. S R. O. Hydraulically controlled check valve
CZ304427B6 (en) * 2009-05-27 2014-04-30 Hennlich Industrietechnik, Spol. S R. O. Hydraulically operated check valve
EP3483691A1 (en) * 2017-11-10 2019-05-15 Danfoss A/S Pressure controlled valve
CN111412311A (en) * 2019-01-07 2020-07-14 丹佛斯有限公司 Differential pressure valve device
CN111895116A (en) * 2020-08-06 2020-11-06 孔庆丰 Novel plunger type constant flow valve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1397867A (en) * 1920-05-26 1921-11-22 Thomas G Jones Valve
GB1016415A (en) * 1963-04-29 1966-01-12 Dansk Pressalit Ind As A regulating and shut-off cock
FR1596693A (en) * 1968-11-28 1970-06-22
WO2006136158A1 (en) * 2005-06-23 2006-12-28 Frese A/S A control valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1397867A (en) * 1920-05-26 1921-11-22 Thomas G Jones Valve
GB1016415A (en) * 1963-04-29 1966-01-12 Dansk Pressalit Ind As A regulating and shut-off cock
FR1596693A (en) * 1968-11-28 1970-06-22
WO2006136158A1 (en) * 2005-06-23 2006-12-28 Frese A/S A control valve

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ304426B6 (en) * 2009-04-27 2014-04-30 Hennlich Industrietechnik, Spol. S R. O. Hydraulically controlled check valve
CZ304427B6 (en) * 2009-05-27 2014-04-30 Hennlich Industrietechnik, Spol. S R. O. Hydraulically operated check valve
RU2585342C2 (en) * 2011-07-08 2016-05-27 Флоукон Интернэшнл А/С Valve
GB2506329A (en) * 2011-07-08 2014-03-26 Flowcon Internat Aps A valve
CN103703290A (en) * 2011-07-08 2014-04-02 弗洛康国际有限公司 Valve
KR20140022470A (en) * 2011-07-08 2014-02-24 플로우콘 인터내셔날 에이피에스 A valve
GB2506329B (en) * 2011-07-08 2018-05-09 Flowcon Int Aps A valve
EP2729719B1 (en) 2011-07-08 2015-06-03 Flowcon International ApS A valve
US9234596B2 (en) 2011-07-08 2016-01-12 Flowcon International Aps Valve for controlling the liquid flow in a plant for central heating
KR101595401B1 (en) * 2011-07-08 2016-02-18 플로우콘 인터내셔날 에이피에스 A valve
WO2013007633A1 (en) * 2011-07-08 2013-01-17 Flowcon International A/S A valve
US9383033B2 (en) 2012-03-22 2016-07-05 Fratelli Pettinaroli S.P.A. Automatic balancing ball valve
WO2013139453A3 (en) * 2012-03-22 2013-11-14 Fratelli Pettinaroli S.P.A. Automatic balancing ball valve
EP3483691A1 (en) * 2017-11-10 2019-05-15 Danfoss A/S Pressure controlled valve
CN109764171A (en) * 2017-11-10 2019-05-17 丹佛斯有限公司 Pressure-control valve
RU2693489C1 (en) * 2017-11-10 2019-07-03 Данфосс А/С Pressure controlled valve
CN109764171B (en) * 2017-11-10 2022-06-07 丹佛斯有限公司 Pressure control valve
CN111412311A (en) * 2019-01-07 2020-07-14 丹佛斯有限公司 Differential pressure valve device
EP3677981B1 (en) * 2019-01-07 2023-08-23 Danfoss A/S Differential pressure valve arrangement
CN111895116A (en) * 2020-08-06 2020-11-06 孔庆丰 Novel plunger type constant flow valve

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