WO2016048136A1 - Fire-fighting foam device for generating fire-fighting foam, and a method for the testing of a fire-fighting foam device - Google Patents
Fire-fighting foam device for generating fire-fighting foam, and a method for the testing of a fire-fighting foam device Download PDFInfo
- Publication number
- WO2016048136A1 WO2016048136A1 PCT/NL2015/050557 NL2015050557W WO2016048136A1 WO 2016048136 A1 WO2016048136 A1 WO 2016048136A1 NL 2015050557 W NL2015050557 W NL 2015050557W WO 2016048136 A1 WO2016048136 A1 WO 2016048136A1
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- WIPO (PCT)
- Prior art keywords
- fire fighting
- fighting foam
- line
- pressure
- flow meter
- Prior art date
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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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/50—Testing or indicating devices for determining the state of readiness of the equipment
Definitions
- Fire-fighting foam device for generating fire-fighting foam, and a method for the testing of a fire-fighting foam device
- the invention relates to a fire fighting foam system for generating fire fighting foam, comprising:
- mixing means for additively mixing fire fighting foam to the fire fighting water running through the fire fighting water line
- a first flow meter for measuring the quantity of fire fighting water running through the fire fighting water line per unit of time
- control unit which is connected to the first flow meter.
- a fire fighting foam system of this type is known from WO2008/118408A.
- the fire fighting foam storage tank is connected to a proportioner pump which is controlled by the control unit and pumps more or less fire fighting foam from the fire fighting foam storage tank into the fire fighting water line in dependence on the measured flow rate of the fire fighting water.
- a fire fighting foam system in which the fire fighting foam storage tank is formed by a bladder tank in which a bladder (balloon) is contained filled with a fire fighting foam.
- a pressure in the bladder tank that wishes to press the fire fighting foam in the bladder outwards.
- This pressure is built up bij means of pressure means.
- the pressure means are formed here by a branch line which connects the fire fighting water line to the bladder tank.
- the mixing means are provided in the fire fighting water line and have a specific resistance. A difference in pressure over the mixing means evolves at a sufficient water flow rate.
- the pressure in the bladder tank equals the pressure upstream of the mixing means.
- the fire fighting foam system further includes:
- a second flow meter for measuring the quantity of fire fighting foam running through the fire fighting foam supply line per unit of time, as well as
- control unit is also connected to the second flow meter and to the control valve, and where the control unit drives the control valve in the case of an exceeding/falling short of a preset limit value for the proportion of the values measured by the two flow meters.
- the control valve can be connected between the fire fighting foam supply line and a return line to the fire fighting foam storage tank or may be located in the fire fighting foam supply line.
- the flow meters, control valve and control unit preferably have an electric configuration. By measuring the quantity of fire fighting foam and fire fighting water per unit of time, the real proportion between the two and thus the foam concentrate in the fire fighting water can be computed. By adapting the flow of the fire fighting foam via the control valve in the case of a deviation of the measured and computed concentration beyond a preset tolerance range, the desired concentration can be accurately adjusted and maintained.
- An embodiment of the fire fighting foam system according to the invention is characterized in that the fire fighting foam storage tank is formed by a bladder tank containing a bladder filled with the fire fighting foam, and a branch line is connected to the fire fighting water line upstream of the mixing means, which branch line is connected to the bladder tank for holding the fire fighting foam under pressure.
- the second flow meter and the control valve may both be located in the fire fighting foam supply line.
- the second flow meter and the control valve are located in the branch line.
- the second flow meter indirectly measures the quantity of fire fighting foam flowing through the foam supply line. For that matter, this quantity equals the quantity of fire fighting water flowing into the bladder tank.
- the fire fighting foam storage tank is formed by a pressure tank in which the fire fighting foam is held under a higher pressure by pressure means than the pressure of the fire fighting water in the fire fighting water line.
- the pressure means may be formed by a compressor pumping air into the pressure tank or a cylinder containing gas under pressure and which is connected to the pressure tank via a pressure controller.
- a further advantageous embodiment of the fire fighting foam system according to the invention is characterized in that the first flow meter is formed by a calibrated pressure sensor.
- the advantageous effect of this will be clarified hereinafter in the description of an embodiment of the method according to the invention.
- Another advantageous embodiment of the fire fighting foam system according to the invention is characterized in that the first flow meter is formed by a differential pressure gauge across an additional restriction or one that is already present.
- a further embodiment of the fire fighting foam system according to the invention is characterized in that the fire fighting foam system further indludes a three-way valve which is located in the fire fighting foam supply line near the mixing means, as well as a return line connected to the three-way valve and a pressure control valve located in the return line.
- the return line may be connected to the fire fighting foam storage tank or to a receiving tank.
- the invention likewise relates to a method for testing the above-mentioned fire fighting foam system according to the invention, which is characterized in that the three-way valve is turned to a state in which the fire fighting foam supply line is connected to the return line and the pressure control valve is set such that during operation there is the same pressure in the return line as there is in the fire fighting water line downstream of the mixing means.
- the purpose of this testing is the checking of the composition of the fire fighting foam (i.e. the concentration of the fire fighting foam in the fire fighting water). By not adding the fire fighting foam to the fire fighting water, but allowing it to return to the fire fighting foam storage tank or by receiving it, a test may be made without using fire fighting foam.
- An embodiment of the method according to the invention is characterized in that the flow is measured by the two flow meters and the control valve is driven by the control unit in dependence on the measured values.
- Another embodiment of the method according to the invention is characterized in that a simulation signal is applied to the first flow meter or at the first flow meter pressure is applied to the water in the fire fighting water line and subsequently the flow is measured by the second flow meter and the control valve is driven by the control unit in dependence on the measured and simulated values.
- the first flow meter is a pressure gauge
- the fire fighting water in the fire fighting water line can be pressurized at the first flow meter in lieu of a simulation signal being applied to the first flow meter.
- tests may be performed without the use of fire fighting water.
- Fig. 1 gives a diagrammatic representation of a first embodiment of the fire fighting foam system according to the invention provided with a bladder tank;
- Fig. 2 gives a diagrammatic representation of a second embodiment of the fire fighting foam system according to the invention provided with a bladder tank and an alternative location of the control valve;
- Fig. 3 gives a diagrammatic representation of a third embodiment of the fire fighting foam system according to the invention provided with a pressure tank;
- Fig. 4 gives a diagrammatic representation of a fourth embodiment of the fire fighting foam system according to the invention provided with a fluid pump. Detailed description of the drawings
- Fig. 1 gives a diagrammatic representation of the fire fighting foam system according to the invention.
- the fire fighting foam system 1 comprises a fire fighting water line 3 in which mixing means 5 are located which are formed by a restriction with a fire fighting foam supply line 7 connected thereto which is connected to a fire fighting foam storage tank 9.
- This fire fighting foam storage tank is formed by a bladder tank in which a bladder 11 (a balloon) is located and which contains the fire fighting foam.
- the space in the bladder tank between the bladder and the tank wall is connected via a branch line 13 to the fire fighting water line 3 upstream of the mixing means 5.
- This branch line 13 forms pressure means for pressurizing the fire fighting foam present in the fire fighting foam storage tank 9.
- the fire fighting foam system 1 further includes a first electromagnetic flow meter 15 which is located in the fire fighting water line 3 upstream of the mixing means 5, for measuring the quantity of fire fighting water running through the fire fighting water line per unit of time. Furthermore, the fire fighting foam system includes a second electromagnetic flow meter 17 which is located in the fire fighting foam supply line 7, for measuring the quantity of fire fighting foam running through the fire fighting foam supply line per unit of time.
- the fire fighting foam supply line 7 further accommodates an electrically controllable control valve 19 which can reduce the flow through the fire fighting foam supply line.
- the fire fighting foam system further includes an electronic control unit 21 which is connected to the two flow meters 15 and 17 and drives the control valve 19 in the case of an exceeding/falling short of a preset limit value for the proportion of the values measured by the two flow meters.
- the fire fighting foam supply line 7 further accommodates a three-way valve
- a return line 25 in which a pressure control valve 27 is located is connected to this three-way valve.
- the return line 23 ends in a receiving container 29 or receiving tank.
- the pressure control valve 27 is set to such a state that during operation there is the same pressure in the return line 25 as there is in the fire fighting water line 3 downstream of the mixing means 5. Then the flow is measured by the two flow meters 15 and 17. In dependence on the measured values the control valve 19 is driven by the control unit 21. In this manner a test is made without the use of fire fighting foam.
- the three-way valve 23 may be arranged as a manually operated valve.
- the flow meters 15 and 17 may be formed by differential pressure gauges which are located across a restriction present in the respective line. However, the flow meters in this embodiment are formed by calibrated pressure sensors. As a result, a simulation signal can be applied to the first flow meter 15 during the test operation or the water in the fire fighting water line 3 may be pressurized at the first flow meter after which the flow may be measured by the second flow meter 17.
- the control valve 19 is then driven by the control unit 21 in dependence on the measured and/or simulated values. In this manner not only no fire fighting foam is used during a test operation but no fire fighting water either.
- Fig. 2 gives a diagrammatic representation of a second embodiment of the fire fighting foam system according to the invention.
- This fire fighting foam system 31 differs from the first embodiment in that the control valve 19 and the second flow meter 17 are located in the branch line 13 in lieu of in the fire fighting foam supply line 7.
- the quantity of fire fighting foam running through the fire fighting foam supply line is measured indirectly here by measuring the quantity of fire fighting water running into the bladder tank.
- Fig. 3 gives a diagrammatic representation of a third embodiment of the fire fighting foam system according to the invention.
- This fire fighting foam system 33 differs from the first embodiment in that the fire fighting foam storage tank 9 is arranged as a pressurized tank.
- the fire fighting foam in the pressurized tank is held under a higher pressure by pressure means 35 than the pressure of the fire fighting water in the fire fighting water line 3 upstream of the mixing means 5.
- the pressure means 35 may be formed by a compressor pumping air into the pressure tank or a cylinder in which a pressurized gas is present and which is connected to the pressurized tank via a pressure regulator.
- the mixing means 5 in this embodiment are formed by the connection of the fire fighting foam system 7 to the fire fighting water line 3.
- Fig. 4 gives a diagrammatic representation of a fourth embodiment of the fire fighting foam system according to the invention.
- This fire fighting foam system 37 differs from the first embodiment in that the fire fighting foam in the fire fighting foam storage tank 9 is not held under pressure but is pumped into the fire fighting water line 3 by means of a fluid pump 39 located in the fire fighting foam supply line 7.
- a fluid pump 39 located in the fire fighting foam supply line 7.
- the control valve 19 is in this case not located in the fire fighting foam supply line but in a bypass line 43 branched off from the fire fighting foam supply line 7 and running back to the fire fighting foam storage tank 9.
- In the bypass line 43 is further located a further pressure control valve 45.
- the return line 25 connected to the three-way valve 23 does not end in a receiving container or receiving tank, but in the fire fighting foam storage tank 9.
- the pressure control valves 27 and 45 may be arranged as manually operated valves.
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
A fire fighting foam system (1) comprises a fire fighting water line (3) in which mixing means (5) are present to which a fire fighting foam supply line (7) is connected which is connected to a fire fighting foam storage tank (9). This fire fighting foam storage tank accommodates a balloon (11) containing the fire fighting foam. The fire fighting foam storage tank is connected via a branch line (13) to the fire fighting water line (3). The fire fighting foam system (1) further includes a first electromagnetic flow meter (15) which is located upstream of the mixing means (5) in the fire fighting water line (3), and a second electromagnetic flow meter (17) which is located in the fire fighting foam supply line (7). In the fire fighting foam supply line (7) is further located an electrically controllable control valve (19) which can reduce the flow rate of the fire fighting foam supply line. An electronic control unit (21) which is connected to the two flow meters (15) and (17) drives the control valve (19) if the proportion of the values measured by the two flow meters deviates too much from a preset limit value.
Description
Fire-fighting foam device for generating fire-fighting foam, and a method for the testing of a fire-fighting foam device
DESCRIPTION:
Field of the invention
The invention relates to a fire fighting foam system for generating fire fighting foam, comprising:
a fire fighting water line,
a fire fighting foam storage tank,
mixing means for additively mixing fire fighting foam to the fire fighting water running through the fire fighting water line,
- a fire fighting foam supply line connecting the fire fighting foam storage tank to the mixing means,
a first flow meter for measuring the quantity of fire fighting water running through the fire fighting water line per unit of time, and
a control unit which is connected to the first flow meter.
State of the art
A fire fighting foam system of this type is known from WO2008/118408A. In this known fire fighting foam system the fire fighting foam storage tank is connected to a proportioner pump which is controlled by the control unit and pumps more or less fire fighting foam from the fire fighting foam storage tank into the fire fighting water line in dependence on the measured flow rate of the fire fighting water.
Also a fire fighting foam system is known in which the fire fighting foam storage tank is formed by a bladder tank in which a bladder (balloon) is contained filled with a fire fighting foam. There is a pressure in the bladder tank that wishes to press the fire fighting foam in the bladder outwards. This pressure is built up bij means of pressure means. The pressure means are formed here by a branch line which connects the fire fighting water line to the bladder tank. The mixing means are provided in the fire fighting water line and have a specific resistance. A difference in pressure over the mixing means evolves at a
sufficient water flow rate. The pressure in the bladder tank equals the pressure upstream of the mixing means. Downstream of the mixing means there is a lower pressure in the fire fighting water line owing to the resistance experienced in the mixing means by the flowing of the fire fighting water. As a result of this difference in pressure the fire fighting foam is drawn from the bladder tank and mixed with the fire fighting water.
Summary of the invention
It is an object of the invention to provide a fire fighting foam system of the type defined in the opening paragraph, in which the concentration of the fire fighting foam in the fire fighting water can be adjusted and maintained in a more accurate manner. For this purpose the fire fighting foam system according to the invention is characterized in that the fire fighting foam system further includes:
a second flow meter for measuring the quantity of fire fighting foam running through the fire fighting foam supply line per unit of time, as well as
a control valve which can reduce the flow through the fire fighting foam supply line, and
where the control unit is also connected to the second flow meter and to the control valve, and where the control unit drives the control valve in the case of an exceeding/falling short of a preset limit value for the proportion of the values measured by the two flow meters.
The control valve can be connected between the fire fighting foam supply line and a return line to the fire fighting foam storage tank or may be located in the fire fighting foam supply line. The flow meters, control valve and control unit preferably have an electric configuration. By measuring the quantity of fire fighting foam and fire fighting water per unit of time, the real proportion between the two and thus the foam concentrate in the fire fighting water can be computed. By adapting the flow of the fire fighting foam via the control valve in the case of a deviation of the measured and computed concentration beyond a preset tolerance range, the desired concentration can be accurately adjusted and maintained.
An embodiment of the fire fighting foam system according to the invention is characterized in that the fire fighting foam storage tank is formed by a bladder tank containing a bladder filled with the fire fighting foam, and a branch line is connected to the fire fighting water line upstream of the mixing means, which branch line is connected to the bladder tank for holding the fire fighting foam under pressure. The second flow meter and the control valve may both be located in the fire fighting foam supply line. However, in an
advantageous embodiment of the fire fighting foam system according to the invention the second flow meter and the control valve are located in the branch line. In this embodiment the second flow meter indirectly measures the quantity of fire fighting foam flowing through the foam supply line. For that matter, this quantity equals the quantity of fire fighting water flowing into the bladder tank.
Another advantageous embodiment of the fire fighting foam system according to the invention is characterized in that the fire fighting foam storage tank is formed by a pressure tank in which the fire fighting foam is held under a higher pressure by pressure means than the pressure of the fire fighting water in the fire fighting water line. The pressure means may be formed by a compressor pumping air into the pressure tank or a cylinder containing gas under pressure and which is connected to the pressure tank via a pressure controller.
A further advantageous embodiment of the fire fighting foam system according to the invention is characterized in that the first flow meter is formed by a calibrated pressure sensor. The advantageous effect of this will be clarified hereinafter in the description of an embodiment of the method according to the invention.
Another advantageous embodiment of the fire fighting foam system according to the invention is characterized in that the first flow meter is formed by a differential pressure gauge across an additional restriction or one that is already present.
A further embodiment of the fire fighting foam system according to the invention is characterized in that the fire fighting foam system further indludes a three-way valve which is located in the fire fighting foam supply line near the mixing means, as well as a return line connected to the three-way valve and a pressure control valve located in the return line. The return line may be connected to the fire fighting foam storage tank or to a receiving tank. This embodiment enables the implementation of the following advantageous method.
The invention likewise relates to a method for testing the above-mentioned fire fighting foam system according to the invention, which is characterized in that the three-way valve is turned to a state in which the fire fighting foam supply line is connected to the return line and the pressure control valve is set such that during operation there is the same pressure in the return line as there is in the fire fighting water line downstream of the mixing means. The purpose of this testing is the checking of the composition of the fire fighting foam (i.e. the concentration of the fire fighting foam in the fire fighting water). By not adding the fire
fighting foam to the fire fighting water, but allowing it to return to the fire fighting foam storage tank or by receiving it, a test may be made without using fire fighting foam.
An embodiment of the method according to the invention is characterized in that the flow is measured by the two flow meters and the control valve is driven by the control unit in dependence on the measured values.
Another embodiment of the method according to the invention is characterized in that a simulation signal is applied to the first flow meter or at the first flow meter pressure is applied to the water in the fire fighting water line and subsequently the flow is measured by the second flow meter and the control valve is driven by the control unit in dependence on the measured and simulated values. In the case where the first flow meter is a pressure gauge, the fire fighting water in the fire fighting water line can be pressurized at the first flow meter in lieu of a simulation signal being applied to the first flow meter. As a result of this, tests may be performed without the use of fire fighting water. Brief description of the drawings
The invention will now be described in more detail below based on an examples of embodiment of the fire fighting foam system according to the invention represented in the drawings. Herein:
Fig. 1 gives a diagrammatic representation of a first embodiment of the fire fighting foam system according to the invention provided with a bladder tank;
Fig. 2 gives a diagrammatic representation of a second embodiment of the fire fighting foam system according to the invention provided with a bladder tank and an alternative location of the control valve;
Fig. 3 gives a diagrammatic representation of a third embodiment of the fire fighting foam system according to the invention provided with a pressure tank; and
Fig. 4 gives a diagrammatic representation of a fourth embodiment of the fire fighting foam system according to the invention provided with a fluid pump. Detailed description of the drawings
Fig. 1 gives a diagrammatic representation of the fire fighting foam system according to the invention. The fire fighting foam system 1 comprises a fire fighting water line 3 in which mixing means 5 are located which are formed by a restriction with a fire
fighting foam supply line 7 connected thereto which is connected to a fire fighting foam storage tank 9. This fire fighting foam storage tank is formed by a bladder tank in which a bladder 11 (a balloon) is located and which contains the fire fighting foam. The space in the bladder tank between the bladder and the tank wall is connected via a branch line 13 to the fire fighting water line 3 upstream of the mixing means 5. This branch line 13 forms pressure means for pressurizing the fire fighting foam present in the fire fighting foam storage tank 9.
The fire fighting foam system 1 further includes a first electromagnetic flow meter 15 which is located in the fire fighting water line 3 upstream of the mixing means 5, for measuring the quantity of fire fighting water running through the fire fighting water line per unit of time. Furthermore, the fire fighting foam system includes a second electromagnetic flow meter 17 which is located in the fire fighting foam supply line 7, for measuring the quantity of fire fighting foam running through the fire fighting foam supply line per unit of time.
The fire fighting foam supply line 7 further accommodates an electrically controllable control valve 19 which can reduce the flow through the fire fighting foam supply line. The fire fighting foam system further includes an electronic control unit 21 which is connected to the two flow meters 15 and 17 and drives the control valve 19 in the case of an exceeding/falling short of a preset limit value for the proportion of the values measured by the two flow meters.
The fire fighting foam supply line 7 further accommodates a three-way valve
23 near the mixing means 5. A return line 25 in which a pressure control valve 27 is located is connected to this three-way valve. The return line 23 ends in a receiving container 29 or receiving tank. During a test operation of the fire fighting foam system 1 the three-way valve 23 is moved to a state where the fire fighting foam supply line 7 is connected to the return line 25. The pressure control valve 27 is set to such a state that during operation there is the same pressure in the return line 25 as there is in the fire fighting water line 3 downstream of the mixing means 5. Then the flow is measured by the two flow meters 15 and 17. In dependence on the measured values the control valve 19 is driven by the control unit 21. In this manner a test is made without the use of fire fighting foam. The three-way valve 23 may be arranged as a manually operated valve.
The flow meters 15 and 17 may be formed by differential pressure gauges which are located across a restriction present in the respective line. However, the flow meters in this embodiment are formed by calibrated pressure sensors. As a result, a simulation signal can be applied to the first flow meter 15 during the test operation or the water in the fire
fighting water line 3 may be pressurized at the first flow meter after which the flow may be measured by the second flow meter 17. The control valve 19 is then driven by the control unit 21 in dependence on the measured and/or simulated values. In this manner not only no fire fighting foam is used during a test operation but no fire fighting water either.
Fig. 2 gives a diagrammatic representation of a second embodiment of the fire fighting foam system according to the invention. This fire fighting foam system 31 differs from the first embodiment in that the control valve 19 and the second flow meter 17 are located in the branch line 13 in lieu of in the fire fighting foam supply line 7. The quantity of fire fighting foam running through the fire fighting foam supply line is measured indirectly here by measuring the quantity of fire fighting water running into the bladder tank.
Fig. 3 gives a diagrammatic representation of a third embodiment of the fire fighting foam system according to the invention. This fire fighting foam system 33 differs from the first embodiment in that the fire fighting foam storage tank 9 is arranged as a pressurized tank. The fire fighting foam in the pressurized tank is held under a higher pressure by pressure means 35 than the pressure of the fire fighting water in the fire fighting water line 3 upstream of the mixing means 5. The pressure means 35 may be formed by a compressor pumping air into the pressure tank or a cylinder in which a pressurized gas is present and which is connected to the pressurized tank via a pressure regulator. The mixing means 5 in this embodiment are formed by the connection of the fire fighting foam system 7 to the fire fighting water line 3.
Fig. 4 gives a diagrammatic representation of a fourth embodiment of the fire fighting foam system according to the invention. This fire fighting foam system 37 differs from the first embodiment in that the fire fighting foam in the fire fighting foam storage tank 9 is not held under pressure but is pumped into the fire fighting water line 3 by means of a fluid pump 39 located in the fire fighting foam supply line 7. In the fire fighting foam supply line 7 near the fire fighting water line 3 is accommodated a one-way valve 41 to avoid the fire fighting water flowing into the fire fighting foam supply line 7. The control valve 19 is in this case not located in the fire fighting foam supply line but in a bypass line 43 branched off from the fire fighting foam supply line 7 and running back to the fire fighting foam storage tank 9. In the bypass line 43 is further located a further pressure control valve 45. Furthermore, the return line 25 connected to the three-way valve 23 does not end in a receiving container or receiving tank, but in the fire fighting foam storage tank 9. The pressure control valves 27 and 45 may be arranged as manually operated valves.
Albeit the invention has been described in the foregoing with reference to the drawings, it should be observed that the invention is not by any manner or means restricted to the embodiments shown in the drawings. The invention also extends to all embodiments deviating from the embodiments shown in the drawings within the scope defined by the claims.
Claims
1. A fire fighting foam system for generating fire fighting foam, comprising: a fire fighting water line (3),
a fire fighting foam storage tank (9),
- mixing means (5) for additively mixing fire fighting foam to the fire fighting water running through the fire fighting water line,
a fire fighting foam supply line (7) connecting the fire fighting foam storage tank to the mixing means,
a first flow meter (15) for measuring the quantity of fire fighting water running through the fire fighting water line (3) per unit of time, and
a control unit (21) which is connected to the first flow meter,
characterized in that the fire fighting foam system further includes:
a second flow meter (17) for measuring the quantity of fire fighting foam running through the fire fighting foam supply line (7) per unit of time, as well as
- a control valve (19) which can reduce the flow through the fire fighting foam supply line,
where the control unit (21) is also connected to the second flow meter and to the control valve, and where the control unit drives the control valve in the case of an exceeding/falling short of a preset limit value for the proportion of the values measured by the two flow meters.
2. A fire fighting foam system as claimed in claim 1, characterized in that the fire fighting foam storage tank (9) is formed by a bladder tank containing a bladder (11) filled with the fire fighting foam, and a branch line (13) is connected to the fire fighting water line (3) upstream of the mixing means (5) which branch line is connected to the bladder tank for holding the fire fighting foam under pressure, where the second flow meter (17) and the control valve (19) are located in the branch line (13).
3. A fire fighting foam system as claimed in claim 1, characterized in that the fire fighting foam storage tank (9) is formed by a pressure tank in which the fire fighting foam is held under a higher pressure by pressure means (45) than the pressure of the fire fighting water in the fire fighting water line (3).
4. A fire fighting foam system as claimed in any one of claims 1, 2 or 3, characterized in that the first flow meter (15) is formed by a calibrated pressure sensor.
5. A fire fighting foam system as claimed in any one of claims 1, 2 or 3, characterized in that the first flow meter (15) is formed by a differential pressure gauge across an additional restriction or one that is already present.
6. A fire fighting foam system as claimed in any one of the preceding claims, characterized in that the fire fighting foam system further indludes a three-way valve (23) which is located in the fire fighting foam supply line (7) near the mixing means (5), as well as a return line (25) connected to the three-way valve and a pressure control valve (27) located in the return line.
7. A method for testing a fire fighting foam system as claimed in claim 6, characterized in that the three-way valve (23) is turned to a state in which the fire fighting foam supply line (7) is connected to the return line (25) and the pressure control valve (27) is set such that during operation there is the same pressure in the return line (25) as there is in the fire fighting water line (3) downstream of the mixing means (5).
8. A method as claimed in claim 7, characterized in that the flow is measured by the two flow meters (15, 17) and the control valve (19) is driven by the control unit (21) in dependence on the measured values.
9. A method as claimed in claim 7, characterized in that a simulation signal is applied to the first flow meter (15) or at the first flow meter (15) pressure is applied to the water in the fire fighting water line (3) and subsequently the flow is measured by the second flow meter (17) and the control valve (19) is driven by the control unit (21) in dependence on the measured and simulated values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP15787702.8A EP3352861A1 (en) | 2014-07-31 | 2015-07-30 | Fire-fighting foam device for generating fire-fighting foam, and a method for the testing of a fire-fighting foam device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2013282 | 2014-07-31 | ||
| NL2013282A NL2013282B1 (en) | 2014-07-31 | 2014-07-31 | Fire-fighting foams Apparatus for generating fire-fighting foams, and a process for the testing of a fire-fighting foams device. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016048136A1 true WO2016048136A1 (en) | 2016-03-31 |
Family
ID=54364631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/NL2015/050557 WO2016048136A1 (en) | 2014-07-31 | 2015-07-30 | Fire-fighting foam device for generating fire-fighting foam, and a method for the testing of a fire-fighting foam device |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3352861A1 (en) |
| NL (1) | NL2013282B1 (en) |
| WO (1) | WO2016048136A1 (en) |
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| CN107050700A (en) * | 2017-05-12 | 2017-08-18 | 广州三业科技有限公司 | Numeral is fixed than big flow mixing arrangement and its test system and adjustment method |
| WO2018148270A1 (en) * | 2017-02-08 | 2018-08-16 | Oshkosh Corporation | Surrogate foam test system |
| CN110279973A (en) * | 2019-07-11 | 2019-09-27 | 北京中卓时代消防装备科技有限公司 | A kind of froth fire extinguishing system testing inspection platform |
| WO2019212398A1 (en) * | 2018-05-03 | 2019-11-07 | Consilium Incendium Ab | Firefighting foam-mixing system |
| CN115501522A (en) * | 2022-09-28 | 2022-12-23 | 徐工消防安全装备有限公司 | Testing device of foam proportioner |
| CN115738139A (en) * | 2022-11-17 | 2023-03-07 | 徐工消防安全装备有限公司 | Foam system, foam fire fighting truck and control method of foam system |
| CN115920292A (en) * | 2022-12-05 | 2023-04-07 | 徐工消防安全装备有限公司 | Foam proportion calibration test system |
| WO2023057929A1 (en) * | 2021-10-06 | 2023-04-13 | Tyco Fire Products Lp | Foam concentrate testing bypass system |
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| US5823219A (en) * | 1992-08-18 | 1998-10-20 | National Foam, Inc. | System and method for producing and maintaining predetermined proportionate mixtures of fluids |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018148270A1 (en) * | 2017-02-08 | 2018-08-16 | Oshkosh Corporation | Surrogate foam test system |
| US10758759B2 (en) | 2017-02-08 | 2020-09-01 | Oshkosh Corporation | Surrogate foam test system |
| US11478671B2 (en) | 2017-02-08 | 2022-10-25 | Oshkosh Corporation | Surrogate foam test system |
| CN107050700A (en) * | 2017-05-12 | 2017-08-18 | 广州三业科技有限公司 | Numeral is fixed than big flow mixing arrangement and its test system and adjustment method |
| WO2019212398A1 (en) * | 2018-05-03 | 2019-11-07 | Consilium Incendium Ab | Firefighting foam-mixing system |
| US11684812B2 (en) | 2018-05-03 | 2023-06-27 | Incendiumab | Firefighting foam-mixing system |
| CN110279973A (en) * | 2019-07-11 | 2019-09-27 | 北京中卓时代消防装备科技有限公司 | A kind of froth fire extinguishing system testing inspection platform |
| WO2023057929A1 (en) * | 2021-10-06 | 2023-04-13 | Tyco Fire Products Lp | Foam concentrate testing bypass system |
| CN115501522A (en) * | 2022-09-28 | 2022-12-23 | 徐工消防安全装备有限公司 | Testing device of foam proportioner |
| CN115501522B (en) * | 2022-09-28 | 2023-08-15 | 徐工消防安全装备有限公司 | Testing device of foam proportion mixer |
| CN115738139A (en) * | 2022-11-17 | 2023-03-07 | 徐工消防安全装备有限公司 | Foam system, foam fire fighting truck and control method of foam system |
| CN115920292A (en) * | 2022-12-05 | 2023-04-07 | 徐工消防安全装备有限公司 | Foam proportion calibration test system |
| CN115920292B (en) * | 2022-12-05 | 2024-02-06 | 徐工消防安全装备有限公司 | Foam proportion calibration test system |
Also Published As
| Publication number | Publication date |
|---|---|
| NL2013282B1 (en) | 2016-09-21 |
| EP3352861A1 (en) | 2018-08-01 |
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