WO2022245200A1 - Device and method for producing a mixture - Google Patents

Device and method for producing a mixture Download PDF

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Publication number
WO2022245200A1
WO2022245200A1 PCT/NL2022/000006 NL2022000006W WO2022245200A1 WO 2022245200 A1 WO2022245200 A1 WO 2022245200A1 NL 2022000006 W NL2022000006 W NL 2022000006W WO 2022245200 A1 WO2022245200 A1 WO 2022245200A1
Authority
WO
WIPO (PCT)
Prior art keywords
medium
housing
flow
flange
supply line
Prior art date
Application number
PCT/NL2022/000006
Other languages
French (fr)
Inventor
Pieter Jan Cornelis Maria VERMUE
Tom Constant Maria WEYNS
Original Assignee
Saval B.V.
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 Saval B.V. filed Critical Saval B.V.
Publication of WO2022245200A1 publication Critical patent/WO2022245200A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C5/00—Making of fire-extinguishing materials immediately before use
    • A62C5/02—Making of fire-extinguishing materials immediately before use of foam

Definitions

  • the invention relates to a device for producing a mixture according to the preamble of claim 1.
  • the invention also relates to a method for producing a mixture according to the preamble of claim 5.
  • 'medium' is understood to mean 'liquid or gaseous substance'. In particular, this involves mixing water and a foam concentrate to form a mixture with a desired degree of mixing.
  • Many embodiments of devices and methods are known for mixing two or more media into a mixture with a desired degree of mixing, for example mixing a liquid (water) with a foaming agent (foam concentrate) and/or a gas (air) when producing of an (extinguishing) foam.
  • the mixing takes place in a mixing pipe and/or a mixing chamber, whereby use is often made of additional mixing means in the form of fixed or moving parts that provide extra shear forces and turbulence in a flow of the media to be mixed, for instance DE3034622A1 , GB2130910A , US20G3045588A1, US8919745BI, andlJS201712G092A1.
  • the media to be mixed can herein be supplied via lines provided with one or more check valves to a mixing chamber, which may or may not be provided with additional mixing means, for instance CN 108635702 A.
  • the invention now provides a device for producing a mixture, which device is simpler in construction, more compact and more robust than known devices and in addition has other advantages.
  • the invention also provides a method for producing a mixture by means of such a device, with which method a desired degree of mixing can be achieved efficiently and effectively. Summary of the invention
  • the invention provides a device according to claim 1.
  • the invention also provides a method according to claim 5.
  • upstream of and ‘downstream of is meant within the scope of the invention ‘in the direction of passage of the check valve before’ respectively ‘in the direction of passage of the check valve after’.
  • the shear forces and turbulence generated by the check val ve are used to achieve the desired degree of mixing of the first medium and the second meaium.
  • a mixing pipe and/or a mixing chamber, and possibly additional mixing means in the form of fixed or moving parts, can thus be omitted. The mixing takes place in a limited space which allows for a more compact device.
  • the invention is further elucidated below on the basis of exemplary embodiments.
  • figure 1 shows a first exemplary embodiment of a device according to the invention
  • figure 2 shows a second exemplar)' embodiment of a device according to the invention
  • figure 3 shows a line with a check valve according to the prior art arranged therein.
  • the device (1) according to the invention shown in figure 1 comprises a first supply line (5) for supplying a first medium (3), here water, a number, here four, second supply lines (6) for supplying a second medium (4), here a foam concentrate, and a discharge line (7) for discharging a produced mixture (2) of the two media (3,4).
  • a first supply line (5) for supplying a first medium (3), here water, a number, here four, second supply lines (6) for supplying a second medium (4), here a foam concentrate, and a discharge line (7) for discharging a produced mixture (2) of the two media (3,4).
  • the device (1) also comprises a check valve (8) comprising a housing (9) and, here two, parts (10) movable relative to the housing (9) for passing a medium flow in a passing direction, here the water (3) supplied through the first supply line (5) and subsequently mixed with the supplied foam concentrate (4), wherein the movable parts (10) are in a first position (solid lines), and for blocking a medium flow in a blocking direction wherein the movable parts (10) are in a second position (dashed lines).
  • a check valve (8) comprising a housing (9) and, here two, parts (10) movable relative to the housing (9) for passing a medium flow in a passing direction, here the water (3) supplied through the first supply line (5) and subsequently mixed with the supplied foam concentrate (4), wherein the movable parts (10) are in a first position (solid lines), and for blocking a medium flow in a blocking direction wherein the movable parts (10) are in a second position (dashed lines).
  • the housing (9) is provided on a first side and upstream of the movable parts (10) with a first inlet (11) for letting in into the housing (9) the water (3) supplied by the first supply line (5), provided on a second side and downstream of the movable parts (10) with an outlet (12) for letting out the mixture produced (2) from the housing (9) to the discharge line (7), and provided in the vicinity of the movable parts (10) and upstream of the outlet (12) with, here four, second inlets (13) arranged in the housing (9) for letting in, distributed, into the housing (9) the foam concentrate (4) supplied through the second supply lines (6),
  • the housing (9) is here provided with a first flange (14) on the first side and a second flange (15) on the second side
  • the first supply line (5) is here provided with a third flange (16) and the discharge line (7) with a fourth flange (17), wherein the first flange (14) and the third flange (16) are mutually connected in a medium-tight manner, and the second flange (15) and the fourth flange (17) are mutually connected in a medium-tight manner.
  • the whole of the check valve (8) with flanges (14,15) is thus interchangeable with an existing check valve (8') with flanges (14', 15') as shown in figure 3.
  • a line with a built-in check valve (S') according to the prior art, can thus be easily converted to a device (1 ,1 ' ) according to the invention.
  • Producing the mixture (2) of water (3) and the foam concentrate (4) comprises supplying the water (3) through the first supply line (5), supplying the foam concentrate (4) through the second supply lines (6), and discharging the produced mixture (2) through the discharge line (7).
  • the production also comprises letting in, at the first side of the housing (9) and upstream of the movable parts (10), through the first inlet (11) into the housing (9) the water (3) supplied through the first supply line (5), letting out the mixture (2) from the housing (9) to the discharge line (7) on a second side of the housing (9) and downstream of the movable parts (10) through the outlet (12), and letting the foam concentrate (4) supplied by the supply lines (6) into the housing (9) in the vicinity of the movable parts (10) and upstream of the outlet (12) through the second inlets (13), distributed, which achieves an even better mixing of the water (3) and the foam concentrate (4).
  • the shear forces and turbulence generated by the check valve (8) are thus used to achieve a desired degree of mixing.
  • the device (1') according to the invention shown in figure 2 is largely the same as the device (1) shown in figure 1.
  • the first flange (14) and the second flange (15) together with a jacket (18) provided for this purpose now form a chamber (19) which is connected to the second inlets (13).
  • the chamber (19) is herein provided with a third ineet (20) for letting in into the chamber (19) the foam concentrate (4) now supplied through only one second supply line (6).
  • the foam concentrate (4) can be let in into the chamber (19) through the third inlet (20) and let in from the chamber (19) through the second inlets (13) in the vicinity of the movable parts (10) into the housing (9), distributed, which achieves an even better mixing of the water (3) and tire foam concentrate (4).
  • the surface of the two movable parts (10) can be provided with, for example rib-shaped or conical, projections (not shown) for generating even more shear forces and turbulence, resulting in even better mixing of the water (3) and the foam concentrate (4).
  • the two movable parts (10) are urged from the first position (solid lines) to the second position (dashed lines) by means of urging means (not shown) provided for this purpose.
  • the geometry of the check valve (8) and the degree of urging by the urging means can be tuned to such a relation between the pressure drop across the check valve and the position of the two movable parts (10), and thus the flow resistance of the check valve (8) and the flow rate and flow velocity differences in the medium flow, that a desired amount of turbulence and shear forces in the medium occurs in the check valve (8), both at lower and higher pressure drops and flow rates, and thereby a desired degree of mixing of the water (3) and the foam concentrate (4) is achieved.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

Device for producing a mixture of a first medium and at least one second medium, comprising: - a first supply line for supplying the first medium: - at least one second supply line for supplying the at least one second medium; - a discharge line for discharging the mixture produced; and - a check valve comprising a housing and at least one part movable relative to the housing, for passing a medium flow in a forward direction and for blocking a medium flow in a blocking direction, characterized in that: - the housing upstream of the at least one part is provided with a first inlet for letting in the supplied first medium into the housing; - the housing downstream of the at least one part is provided with an outlet for letting out the mixture produced from the housing to the discharge line; and - the housing in the vicinity of the at least one part is provided, with at least one second inlet for letting in the at least one second medium into the housing. Thus, the shear forces and turbulence created by the check valve are used to achieve a desired degree of mixing of the two media. A mixing pipe or a mixing chamber, and any additional mixing means in the form of fixed or moving parts, can thus be omitted. The device is simple in construction, compact and robust. Also method for producing a mixture by means of such a device.

Description

Device and method for producing a mixture
Field of the invention
The invention relates to a device for producing a mixture according to the preamble of claim 1. The invention also relates to a method for producing a mixture according to the preamble of claim 5. in the context of the invention, 'medium' is understood to mean 'liquid or gaseous substance'. In particular, this involves mixing water and a foam concentrate to form a mixture with a desired degree of mixing.
Background of the invention
Many embodiments of devices and methods are known for mixing two or more media into a mixture with a desired degree of mixing, for example mixing a liquid (water) with a foaming agent (foam concentrate) and/or a gas (air) when producing of an (extinguishing) foam. The mixing takes place in a mixing pipe and/or a mixing chamber, whereby use is often made of additional mixing means in the form of fixed or moving parts that provide extra shear forces and turbulence in a flow of the media to be mixed, for instance DE3034622A1 , GB2130910A , US20G3045588A1, US8919745BI, andlJS201712G092A1. The media to be mixed can herein be supplied via lines provided with one or more check valves to a mixing chamber, which may or may not be provided with additional mixing means, for instance CN 108635702 A.
The invention now provides a device for producing a mixture, which device is simpler in construction, more compact and more robust than known devices and in addition has other advantages. The invention also provides a method for producing a mixture by means of such a device, with which method a desired degree of mixing can be achieved efficiently and effectively. Summary of the invention
The invention provides a device according to claim 1. The invention also provides a method according to claim 5. By ‘upstream of and ‘downstream of is meant within the scope of the invention ‘in the direction of passage of the check valve before’ respectively ‘in the direction of passage of the check valve after’. Thus, the shear forces and turbulence generated by the check val ve are used to achieve the desired degree of mixing of the first medium and the second meaium. A mixing pipe and/or a mixing chamber, and possibly additional mixing means in the form of fixed or moving parts, can thus be omitted. The mixing takes place in a limited space which allows for a more compact device.
The invention is further elucidated below on the basis of exemplary embodiments.
Brief description of the drawings
In the drawings: figure 1 shows a first exemplary embodiment of a device according to the invention; figure 2 shows a second exemplar)' embodiment of a device according to the invention; and figure 3 shows a line with a check valve according to the prior art arranged therein.
Further explanation and implementation examples
The device (1) according to the invention shown in figure 1 comprises a first supply line (5) for supplying a first medium (3), here water, a number, here four, second supply lines (6) for supplying a second medium (4), here a foam concentrate, and a discharge line (7) for discharging a produced mixture (2) of the two media (3,4). The device (1) also comprises a check valve (8) comprising a housing (9) and, here two, parts (10) movable relative to the housing (9) for passing a medium flow in a passing direction, here the water (3) supplied through the first supply line (5) and subsequently mixed with the supplied foam concentrate (4), wherein the movable parts (10) are in a first position (solid lines), and for blocking a medium flow in a blocking direction wherein the movable parts (10) are in a second position (dashed lines). According to the invention, the housing (9) is provided on a first side and upstream of the movable parts (10) with a first inlet (11) for letting in into the housing (9) the water (3) supplied by the first supply line (5), provided on a second side and downstream of the movable parts (10) with an outlet (12) for letting out the mixture produced (2) from the housing (9) to the discharge line (7), and provided in the vicinity of the movable parts (10) and upstream of the outlet (12) with, here four, second inlets (13) arranged in the housing (9) for letting in, distributed, into the housing (9) the foam concentrate (4) supplied through the second supply lines (6),
The housing (9) is here provided with a first flange (14) on the first side and a second flange (15) on the second side, The first supply line (5) is here provided with a third flange (16) and the discharge line (7) with a fourth flange (17), wherein the first flange (14) and the third flange (16) are mutually connected in a medium-tight manner, and the second flange (15) and the fourth flange (17) are mutually connected in a medium-tight manner. The whole of the check valve (8) with flanges (14,15) is thus interchangeable with an existing check valve (8') with flanges (14', 15') as shown in figure 3. A line with a built-in check valve (S') according to the prior art, can thus be easily converted to a device (1 ,1 ' ) according to the invention.
Producing the mixture (2) of water (3) and the foam concentrate (4) comprises supplying the water (3) through the first supply line (5), supplying the foam concentrate (4) through the second supply lines (6), and discharging the produced mixture (2) through the discharge line (7). According to the invention, the production also comprises letting in, at the first side of the housing (9) and upstream of the movable parts (10), through the first inlet (11) into the housing (9) the water (3) supplied through the first supply line (5), letting out the mixture (2) from the housing (9) to the discharge line (7) on a second side of the housing (9) and downstream of the movable parts (10) through the outlet (12), and letting the foam concentrate (4) supplied by the supply lines (6) into the housing (9) in the vicinity of the movable parts (10) and upstream of the outlet (12) through the second inlets (13), distributed, which achieves an even better mixing of the water (3) and the foam concentrate (4). The shear forces and turbulence generated by the check valve (8) are thus used to achieve a desired degree of mixing.
The device (1') according to the invention shown in figure 2 is largely the same as the device (1) shown in figure 1. Here, the first flange (14) and the second flange (15) together with a jacket (18) provided for this purpose now form a chamber (19) which is connected to the second inlets (13). The chamber (19) is herein provided with a third ineet (20) for letting in into the chamber (19) the foam concentrate (4) now supplied through only one second supply line (6). Thus, the foam concentrate (4) can be let in into the chamber (19) through the third inlet (20) and let in from the chamber (19) through the second inlets (13) in the vicinity of the movable parts (10) into the housing (9), distributed, which achieves an even better mixing of the water (3) and tire foam concentrate (4).
According to the invention, the surface of the two movable parts (10) can be provided with, for example rib-shaped or conical, projections (not shown) for generating even more shear forces and turbulence, resulting in even better mixing of the water (3) and the foam concentrate (4).
Preferably, the two movable parts (10) are urged from the first position (solid lines) to the second position (dashed lines) by means of urging means (not shown) provided for this purpose. According to the invention, the geometry of the check valve (8) and the degree of urging by the urging means can be tuned to such a relation between the pressure drop across the check valve and the position of the two movable parts (10), and thus the flow resistance of the check valve (8) and the flow rate and flow velocity differences in the medium flow, that a desired amount of turbulence and shear forces in the medium occurs in the check valve (8), both at lower and higher pressure drops and flow rates, and thereby a desired degree of mixing of the water (3) and the foam concentrate (4) is achieved.

Claims

Claims
1, Device (1) for producing a mixture
(2) of a first medium
(3) and at least one second medium
(4), comprising:
- a first supply line
(5) arranged and suitable for supplying the first medium (3);
- at least one second supply line
(6) arranged and suitable for supplying the at least one second medium (4);
- a discharge line
(7) arranged and suitable for discharging the mixture produced (2); and
~ a check valve
(8) comprising a housing (9) and at least one part (10) movable relative to the housing (9), arranged and suitable for passing a medium flow in a passing direction and for blocking a medium flow in a blocking direction, characterized in that:
- the housing (9) on a first side and upstream of the at least one movable part (10) is provided with a first inlet (11) arranged and suitable for letting in into the housing
(9) the first medium (3) supplied through the first supply line (5);
- the housing (9) on a second side and downstream of the at least one movable pan
(10) is provided with an outlet (12) arranged and suitable for letting out the mixture produced (2) from the housing (9) to the discharge line (7); and
- the housing (9) in the vicinity of the at least one part (10) and upstream of the outlet (12) is provided with at least one second inlet (13) arranged and suitable for letting in into the housing (9) the at least one second medium (4) supplied through the at least one second supply line (6).
2. Device according to claim 1, characterized in that:
- the housing (9) is provided on the first side with a first flange ( 14):
- the housing (9) is provided on the second side with a second flange (15);
- the first supply line (5) is provided with a third flange (16);
- the discharge line (7) is provided with a fourth flange (17);
~ the first flange (14) and the third flange (16) are mutually connected in a medium- tight manner; and - the second flange (15) and the fourth flange (17) are mutually connected in a medium-tight manner.
3. Device according to claim 2, characterized in that:
- the first flange (14) and the second flange (15) together with a jacket (18) provided for this purpose form a chamber (19) which is connected to the at least one second inlet (13); and
- the jacket (18) is provided with a third inlet (20) for letting ill into the chamber (19) the at least one second medium (4) supplied by the at least one second supply line (6).
4. Device according to any of claims 1-3. wherein the at least one movable part (10) is urged by means of urging means provided for this purpose from a first position in which the medium flow is passed in the passing direction to a second position in which the medium flow is blocked, characterized in that the geometry of the check valve (8) and the degree of urging by the urging means is tuned to such a relation between the pressure drop across the check valve and the position of the at least one movable part (10), and thus the flow resistance of the check valve (8) and the flow rate and flow velocity differences in the medium flow, that in the check valve (8) a desired amount of turbulence and shear forces occurs In the medium flow, both at lower and higher pressure drops and flow' rates, and thus a desired degree of mixing of the first medium (3) and the second medium (4) is achieved.
5. Method for producing a mixture (2) of a first medium (3) and at least one second medium (4) by means of a device (1) according to the preamble of claim 1, the method comprising:
- supplying the first medium (3) through the first supply line (5);
- supplying the at least one second medium (4) through the at least one second supply line (6); and
- discharging the mixture produced (2) through the discharge line (7), characterized in that the method also comprises:
- letting in the first medium (3) supplied by the first supply line (5) into the housing (9) on a first side of the housing (9) and upstream of the at least one part (10) through a first inlet (11) provided for that purpose; - letting out the mixture (2) from the housing (9) to the discharge line (7) on a second side of the housing (9) and downstream of the at least one part (10) through an outlet (12) provided for this purpose: and
- letting in the at least one second medium (4) supplied by the at least one second supply line (6) into the housing in the vicinity of the at least one part (10) and upstream of the outlet (12) through at least one second inlet (13) provided for this purpose.
6. Method according to claim 5, wherein the at least one part (10) is urged by means of urging means provided for this purpose from a first position in which the medium flow is passed in the passing direction to a second position in which the medium flow is blocked, characterized in that the method also comprises tuning the geometry of the check valve (8) and the degree of urging by the urging means to such a relation between the pressure drop across the cheek valve and the position of the at least one movable part (10), and thus the flow resistance of the check valve (8) and the flow rate and flow velocity differences in the medium flow, that in the cheek valve (8) a desired amount of turbulence and shear forces occurs in the medium flow, both at lower and higher pressure drops and flow rates, and thus a desired degree of mixing of the first medium (3) and the second medium (4) is achieved.
7. Method according to claim 5 or 6, characterized in that the first medium consists at least substantially of water and that the second medium consists at least substantially of a foam concentrate.
PCT/NL2022/000006 2021-05-17 2022-05-13 Device and method for producing a mixture WO2022245200A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1044031 2021-05-17
NL1044031A NL1044031B1 (en) 2021-05-17 2021-05-17 Apparatus and method for producing a mixture

Publications (1)

Publication Number Publication Date
WO2022245200A1 true WO2022245200A1 (en) 2022-11-24

Family

ID=76708365

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Application Number Title Priority Date Filing Date
PCT/NL2022/000006 WO2022245200A1 (en) 2021-05-17 2022-05-13 Device and method for producing a mixture

Country Status (2)

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WO (1) WO2022245200A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3034622A1 (en) 1980-09-13 1982-04-01 Rheinische Braunkohlenwerke AG, 5000 Köln Foam generating and conveying equipment - uses foam agent-water mixture with introduction of compressed air
GB2130910A (en) 1982-09-25 1984-06-13 Gilmat Engineering Limited Additive supply apparatus for use in a fluid supply line
US8919745B1 (en) 2011-09-27 2014-12-30 Carroll G. Rowe High flow rate foam generating apparatus
CN108635702A (en) 2018-05-16 2018-10-12 东华大学 Foam solution mixing generating means in a kind of compressed air foam fire-extinguishing system
CN110284918B (en) * 2019-07-03 2021-02-12 安徽理工大学 Gel foam fire extinguishing device and using method thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6602916B2 (en) 2001-08-17 2003-08-05 Halliburton Energy Services, Inc Foaming apparatus and method
US20170120092A1 (en) 2015-11-03 2017-05-04 Waterous Company Compressed Air Foam Fluid Mixing Device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3034622A1 (en) 1980-09-13 1982-04-01 Rheinische Braunkohlenwerke AG, 5000 Köln Foam generating and conveying equipment - uses foam agent-water mixture with introduction of compressed air
GB2130910A (en) 1982-09-25 1984-06-13 Gilmat Engineering Limited Additive supply apparatus for use in a fluid supply line
US8919745B1 (en) 2011-09-27 2014-12-30 Carroll G. Rowe High flow rate foam generating apparatus
CN108635702A (en) 2018-05-16 2018-10-12 东华大学 Foam solution mixing generating means in a kind of compressed air foam fire-extinguishing system
CN110284918B (en) * 2019-07-03 2021-02-12 安徽理工大学 Gel foam fire extinguishing device and using method thereof

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