EP0647458B1 - Zumischeinrichtung zum Zumischen von Zusatzmitteln zu einer Flüssigkeit - Google Patents
Zumischeinrichtung zum Zumischen von Zusatzmitteln zu einer Flüssigkeit Download PDFInfo
- Publication number
- EP0647458B1 EP0647458B1 EP94115756A EP94115756A EP0647458B1 EP 0647458 B1 EP0647458 B1 EP 0647458B1 EP 94115756 A EP94115756 A EP 94115756A EP 94115756 A EP94115756 A EP 94115756A EP 0647458 B1 EP0647458 B1 EP 0647458B1
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- EP
- European Patent Office
- Prior art keywords
- liquid
- line
- extinguishing agent
- additive
- drive
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- Legal status (The legal status 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 status listed.)
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- 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 an admixing device for admixing an additive a liquid, especially for admixing foaming agents in extinguishing agents, e.g. in fire engines, as described in the preamble of claim 1 and a method for admixing additives to a liquid, in particular an extinguishing agent as described in the preamble of claim 18 is.
- the measuring device for the amount of liquid flowing through the delivery line a differential gear coupled to the output shaft of the water motor, wherein Speed differences between those generated by the water flowing through Rotation of the measuring device by means of a helical one arranged in the delivery line Propeller and the speed from the water motor result in a change of the passage cross section of the liquid to the water motor until an equal Speed or a predetermined speed ratio in the area of the rotary differential is reached.
- the disadvantage of this solution is that the amount of the admixed Additive is relatively imprecise and also the proportioning ratio, ie that proportion of additive that is mixed to a predetermined amount of liquid cannot be set.
- No. 4,324,294 A discloses an admixing device for admixing additives to a liquid, in particular an extinguishing agent known, in which the pressure line for the drive device of the conveyor in front of the sensor for the flow rate of the mixture or liquid with the pressure line before Transmitter is connected.
- the drive device is with the conveyor connected, so that depending on the pressure in the pressure line, the conveyor is controlled.
- the admixture of the additive takes place via the conveying device into the extinguishing agent pump in front of the transmitter.
- One disadvantage is one such mixing device that by feeding the additive into the Extinguishing agent pump the mixing of the extinguishing water with the additive already in of the extinguishing agent pump takes place, so that inaccurate measurement results of the transmitter can be determined.
- an admixing device is already known - according to DE-OS 30 38 334 -, at the extinguishing agent outlets either with liquid or with a mixture Liquid and additives can be loaded. It is intended that about a pump with adjustable drive motor admixture from an admixture tank sucked in and depending on the flow rate in the delivery line leading to the Extinguishing agent outlets leads, which with a mixture of liquid and foam agent should be loaded, and depending on an admixture of additives for a predefined amount of liquid with higher pressure in the liquid line is pressed in before the extinguishing agent outlets.
- the disadvantage here is that its own energy source and its own drive system for driving the metering device is necessary. Furthermore, the monitoring of the further dosage of the additive extremely difficult and usually requires extensive additional measuring devices, adapting them to the different additives, especially the different ones Viscosities of the additives are difficult.
- the object of the invention is therefore to provide an admixing device in which freely selectable ratio between the amount of liquid and the amount of additive also A constant, constant admixture of the required over a longer period of operation Amount of additive in the funding is reached.
- the amount of liquid required for the drive in particular in the case of tank fire engines can be fed to the suction inlet of the extinguishing agent pump and therefore none Loss of liquid occurs or, in the case of non-environmentally compatible extinguishing agents, pollution can be prevented.
- Another advantage of the embodiment variant according to claim 3 is that in the area of the additive supply between the conveying device and the admixing line no measuring device for the flow rate of the additive is required. In order to can avoid malfunctions during the transport of the additive, as well as flow resistance and is therefore a perfect admixture of very tough additives possible.
- An embodiment variant according to claim 4 is also advantageous since the determination of the volume ratios between the drive device and the Conveying device that overpressure with which the additive in the admixing line is pressed in, simply determined and also due to the viscosity and the mechanical transmission losses can be canceled so that regardless of the pressure conditions in the admixing line in proportional dependence the additive is fed into the admixing line with overpressure.
- an embodiment according to claim 5 is also advantageous, whereby with a single component, namely a cylinder-piston unit with two coupled pistons the admixing device can be produced.
- An embodiment according to claim 9 is also advantageous, since this makes it easier Way the pressure differences between the pumped with the extinguishing agent pump Liquids and a higher pressure in the pressure line of the Additive or foam agent can be achieved. It can therefore preferably be used Pressure difference that at least compensates for the friction losses, that in the course of conveying the foam agent or the additive from the foam agent tank occur up to the admixture line. It is also advantageous if this printing difference is chosen larger, since this ensures a uniform, continuous pressing of the foam or additive can be achieved in the mixing line.
- the training according to claim 12 is recommended, because it is in a confined space greater increases in pressure can be achieved.
- a further development according to claim 15 is also advantageous, since this makes it quick Reversal and also a high stroke frequency of the admixing device can be achieved is.
- an embodiment according to claim 16 is also advantageous, since this means that every stroke that changes constantly due to changes in viscosity or the like Operating situations can be monitored and thus very sensitive to any Changes are responded to, so that an even retention of the desired one Mixing ratio is reached.
- the invention also includes a method for admixing additives a liquid, especially an extinguishing agent, as in the preamble of the claim 18 is described.
- the advantage here is that to regulate the amount of admixture to be mixed only the amount of liquid that is actually used the extinguishing agent outlets to which the mixture of extinguishing agent and additive can be applied is fed.
- the other advantage of this surprisingly simple one Measures is that with the existing pressure medium, namely with the extinguishing agent or a part of the same, the foam agent under one compared to the Extinguishing media higher pressure can be injected or dosed into the extinguishing media can, which ensures good mixing and an exact maintenance of the admixing rate or the proportion of foam to the extinguishing agent can be achieved.
- a procedure according to claim 19 is also advantageous since constant monitoring of the rotational or lifting speed of the drive device a sensitive regulation and continuous adjustment of the delivery rate of the to be added Additive can be achieved, which makes it particularly useful of foam agent an even foam build-up with the same high quality and corresponding foaming volume and therefore a very favorable exploitation of the extinguishing agent and additive can be achieved.
- the procedure according to claim 20 ensures that that Amount of extinguishing agent used to operate the proportioning device, i.e. to drive the Conveyor is needed, is not lost, but in the circuit by supply into the suction line of the extinguishing agent pump or the return into an extinguishing agent tank can be used again and thus there is no loss of extinguishing agent or the extinguishing agent requirement is not increased by the function of the admixing device.
- a fire engine 1 in particular a tank fire engine, is used as the emergency vehicle shown, which with an admixing device 2 for the production of additives, in particular foaming agents or plasticizers, mixed, foam-shaped extinguishing agent, especially water is.
- additives in particular foaming agents or plasticizers, mixed, foam-shaped extinguishing agent, especially water is.
- This admixing device 2 consists essentially of an extinguishing agent tank 3, one Extinguishing agent pump 4, an additive tank 5, a metering device 6 for additive, a control and / or display device 7 and a measuring device with a transducer 8 for determining the flow rate with the additive amount of extinguishing agent to be moved.
- an extinguishing agent launcher 9 and a group 10 of extinguishing agent exits 11 or a group 12 of extinguishing agent outlets 13.
- the arrangement of the admixing device 2 is simplified and partly schematic shown drawn.
- the extinguishing agent pump 4 and the extinguishing agent tank 3 are adjacent to the extinguishing agent and / or Rescue equipment, such as fittings, hoses, cutters or the like.
- the respective loading of one with such an admixing device equipped fire engine 1 is arbitrary and for the respective purpose tunable.
- fire engines are used at airports in the majority of their structure with tanks and extinguishing agents and additives provided and contain only small amounts of equipment, while at Combined vehicles fire fighting vehicles in residential areas with tanks up to 2000 to 4000 l extinguishing agent, especially water and correspondingly large ones Additive tanks and rescue and recovery equipment such as hydraulic Cutting and spreading devices as well as light generators, hoses and fire-fighting fittings prevail.
- this admixing device 2 can also be used for other areas Emergency vehicles, for example in road maintenance or for cleaning work Find use in which, for example, liquids with cleaning additives, Plasticizers, various gases such as tear gas or irritant liquids are added.
- FIG. 2 shows the arrangement of the admixing device 2 for producing additives, in particular foaming agents or plasticizers offset foam-like extinguishing agents represented schematically in a block diagram.
- An extinguishing agent tank 3 contains a liquid 14, preferably water, and is over a tank outlet line 15, a shut-off valve 16 and a suction line 17 with the Extinguishing agent pump 4 connected. Between a pressure line 18 of the extinguishing agent pump 4 and a mixing line 19 is the transmitter 8 for determining the flow rate arranged.
- the transmitter 8 is also connected via a line 20 to the Control and / or display device 7 connected.
- the control and / or display device 7 is composed of a comparator 21 for the flow rate of the amount of extinguishing agent to be mixed with the additive and the admixing factor over a fraction of additive, which one Predeterminable amount of liquid 14 is to be added to a comparator 22 for the monitoring of the stroke frequency of the metering device 6 and a setpoint memory 23.
- the admixing factor for example in percent, can be input 24 can be preset for the setpoint memory 23.
- the additive tank 5 for receiving the additive, in particular a foaming agent 25, is via a line 26 with a conveying device 27 of the metering device 6 linked for additives.
- a shut-off valve 28 and Check valves 29 are arranged in the line 26 .
- the metering device 6 for additives essentially consists of a drive device 30 and the conveyor device 27.
- the drive device 30 consists of a cylinder 31, a piston 32 and piston rods 33 and 34.
- Piston rod 33 In the area of Piston rod 33 is a sensor 35 for determining the delivery frequency of the drive device 30 placed and via a connecting line 36 to the control device 7 connected.
- the cylinder 31 is provided with inlet openings 37, 38 and outlet openings 39, 40.
- the inlet openings 37, 38 are connected to the pressure line via a supply line 41 18 of the extinguishing agent pump 4 connected.
- a shut-off valve is in the supply line 41 42 arranged, as well as butterfly valves 43, 44, which have a switching device 45, for example a pneumatic actuating cylinder, can be switched.
- Shut-off valves 46, 47 are also assigned to the outlet openings 39, 40 are in turn connected to the switching device 45.
- the control of the individual Butterfly valves 43, 44, 46 and 47 is made so that each diagonally opposite butterfly valves 43 and 47 or 44 and 46 alternately opened or are closed. This switching can be an alternating mutual Displacement of the piston 32 from the system on an end wall opposite and vice versa.
- This reciprocating drive movement is via the piston rod 34 to actuate the conveyor 27 provided.
- a return line 48 between the outlet openings 39, 40 and the suction line 17 of the extinguishing agent pump 4 or the extinguishing agent tank 3 is equipped with shut-off valves 49, 50, 51 and a control device 52 for the flow rate.
- the control device 52 for the flow rate is also via a control line 53 with the Control device 7 connected.
- the conveying device 27 for additives is constructed similarly to the drive device 30 and is formed from a cylinder 54, a piston 55 and piston rods 56, 57.
- the conveyor device 27 is connected to the drive device 30 via the piston rods 34 and 56 motion-linked in the stroke direction.
- the cylinder 54 of the conveyor 27 is also provided with inlet openings 58, 59 and outlet openings 60, 61 equipped.
- a pressure line 62 with check valves 63 in the area of the outlet openings 60, 61 connects the conveying device 27 to the admixing line 19 and subsequently via lines 64 and 65 to group 10 of extinguishing agent outlets 11 and with group 12 of extinguishing agent exits 13.
- Shut-off valves 66, 67 are arranged 11 and 13, respectively.
- a line 68 with a shut-off valve 69 enables a direct connection between the pressure line 18 of the extinguishing agent pump 4 and groups 10 and 12 of the extinguishing agent outlets 11 and 13 bypassing the transmitter 8 and the pressure line 62 for the foaming agent 25, whereby the extinguishing agent outlets 11 and 13 of groups 10 and 12 also only can be loaded with pure extinguishing agent without the addition of an additive.
- the advantage is achieved that the respective outputs depending on the desired Use different extinguishing agents in quick succession can be.
- the extinguishing agent launcher 9 is connected to the pressure line 18 via a line 70 Extinguishing agent pump 4 or via a line 71 with the metering device 6 for additives connected.
- the lines 70 and 71 there are shut-off valves 72, 73 for switching arranged in different operating modes.
- a rinse line 74 for cleaning purposes that come into contact with additives Lines is between the pressure line 18 of the extinguishing agent pump 4 and the line 26 provided.
- a line 75 with a shut-off valve 76 also enables one External supply of liquid 14, for example from a hydrant 77 or one upstream extinguishing agent pump in the suction line 17 between the shut-off valve 16 and the extinguishing agent pump 4.
- shut-off valves 78 can either be from an external water source, for example a hydrant 77 or the flushing line 74 via the extinguishing agent pump 4 be charged.
- shut-off valves 16, 28, 42, 49 to 51, 66, 67, 69, 72 and 73, as well 76 and 78 can be designed as manually operated valves. In many cases, these are Shut-off valves 16, 28, 42, 49 to 51, 66, 67, 69, 72 and 73 however - especially those that can often be operated while the extinguishing operation is in progress - as remote-controlled valves be provided with electrical or fluidic drives.
- the control can then either centrally from the control and / or display device 7 via lines 79 or via a central pressure fluid, for example compressed air.
- a cylinder piston drive Switching device 45 formed by a switching valve 80 for reversing the Control air is applied in the opposite direction.
- This switch valve 80 is via an actuator 81, for example also a pneumatic drive, adjustable from one setting to the other.
- the triggering of the adjustment from one end position to the other takes place via pneumatic limit switches 82, 83 which each of a stop plate 84 on the piston rod 33 in the two end positions of the piston 32 takes place within the cylinder chamber 85. This will make the movement of the piston 32 in the cylinder chamber 85 whenever it reaches its end position has, by acting on the limit switches 82 and 83 in the opposite Moving direction.
- this is done by using the switching device 45 from a compressed air source 86 via a changeover valve 80 Compressed air is applied and thereby the cylinder chambers 85 and 87 be filled with extinguishing agent, the one in the opposite cylinder chamber 85 or 87 extinguishing agents available via the diagonally arranged outlet opening 40 and 39 discharged and discharged into the open via the shut-off valves 49 and 50 or via the return line 48 and the shut-off valves 51 of the intake line 17th the extinguishing agent pump 4 or the extinguishing agent tank 3 is supplied.
- the additive For admixing the additive e.g. of foam agent 25 via the conveyor 27 in lines 64 and / or 65 and / or 71 the additive must have a higher Have pressure than the pressure of the extinguishing agent in these lines 64, 65, 71. Now that the extinguishing water in the pressure line 18 is passed on the supply line 41 to the drive device 30 for driving the conveyor device 27 for the additive to be used, it requires different Press in cylinder chambers 85, 87 and 88, 89. The one with conveyor 27 Extraction pressure exerted on the additive must take into account the flow resistance be higher in the check valves 63 and the pressure line 62 than the pressure of the conveying means in the admixing line 19.
- piston rods 33,34 and 56,57 in the individual cylinders 31 and 54 also have different diameters 93 and 92, it only has to be sure that the force generated by the drive device 30 is sufficient, to with the conveying device 27 the pressure in the additive to one above the extinguishing agent increase lying value.
- liquid 14 for example water from an extinguishing agent tank 3 or from a hydrant 77 or from a feed line fed to the suction line 17 via an upstream extinguishing agent pump.
- the liquid 14 is sucked in above the negative pressure generated in the extinguishing agent pump 4 and with a pressure between usually 6 and 12 bar in high pressure systems up to 40 or 50 bar in the pressure line 18.
- the extinguishing agent is used or the liquid 14 via the supply line 41 to the lines 68, 70 and via these shut-off valves 69, 72 the individual lines 64, 65 and 71 fed to the extinguishing agent launcher 9.
- shut-off valve 72 is closed and the shut-off valve 42 opened. This causes the proportion of the extinguishing agent launcher 9 no longer require the extinguishing agent through the supply line 41 to the extinguishing agent thrower 9 is supplied, but via the transmitter 8 and the admixing line 19, into which the pressure line 62 opens from the conveying device 27, via the additive under higher pressure and fed into the admixing line 19 is pressed.
- the mixture of extinguishing agents and additives is supplied via line 71 to the extinguishers 9, where appropriate mixed up and delivered to a place of use, especially a source of fire.
- the control and / or display device 7 is provided.
- the proportioning factor can be a fraction, for example in percent, of additives, of a predetermined amount of extinguishing agents is to be added.
- This measured value is stored in a setpoint memory 23 deposited. From this signal from the setpoint memory 23 and the Transducer 8 set flow rate to the admixing line 19 becomes a quantity predefined of required additives.
- a measuring device 94 for example by a light scale 95 a scanning head 96 associated therewith can be formed. Is determined based on the Time between passing two immediately adjacent lying markings 97 found that due to this lifting speed the admixture line 19 supplied amount of additive for with the transmitter 8 determined flow rate of extinguishing agent in the admixing line 19 not is sufficient, a difference signal is generated in the comparator 22, which via the Control line 53 an adjustment drive 98 of the control device 52 for an increase of the passage cross section in the control device 52. This will make the increased amount of extinguishing agent flowing through the cylinder chamber 85 or 87, and this causes a higher pump frequency and thus a faster squeezing and Refill the additive in the cylinder chambers 88 and 89.
- Another advantage of this solution lies in the use of cylinder piston arrangements, with which a wealth of extinguishing and Detergents or other additives an extinguishing agent or water or can be added to a cleaning liquid.
- this device is also insensitive to different toughnesses the additive, since the piston speed of the drive device 30 with independent adaptation to the respective viscosity continuously on the desired Stroke frequency can be kept.
- a major advantage is the low level required in such systems Differential pressure between extinguishing agent and additive, which only has to be so high that the pressure losses in the delivery system of the pressure medium, i.e. in the supply line, are compensated become.
- This metering device 6 for example referred to as a differential pressure piston pump, includes a cylinder piston assembly 99, the cylinder 100 by a fixed Distribution plate 101 is divided into two piston chambers 102, 103.
- the distribution plate 101 simultaneously forms a guide 104 for a piston rod 105, the two in the connects the two piston chambers 102, 103 arranged pistons 106, 107 in a stationary manner.
- a length 108 of the piston rod 105 is dimensioned so that in their respective End position of one of the two pistons 107 or 106 on one of the piston chambers 102 or 103 abutting front plate 109 with a front side 110 facing it, while the other piston 106 or 107 with its inside 111 on the distributor plate 101 is present.
- the inside 111 of the piston 107 is then in the opposite end position on the distributor plate 101 and the front side 110 of the piston 106 on the end plate 109 at.
- One of the two pistons 106, 107 or both are with a further piston rod 112 connected to the piston chamber 102 and / or 103 each in the direction the end plates 109 protrudes and has a length that is greater than a stroke length 113 of the pistons 106, 107 in the piston spaces 102, 103.
- the piston 106 creates two separate cylinder chambers in the piston chamber 102 114, 115 and two separate cylinder chambers 116, 117 are created in the piston chamber 103.
- the displacement area is the Inside 111 of the two pistons 106, 107 considerably smaller than on the front 110.
- the diameter in the cylinder 100 is based on the ratios 118 to 119 or based on the volume ratio between the cylinder chambers 114, 117 and the cylinder chambers 115, 116 a proportionality between the delivery rate and delivery pressure in the cylinder chambers 114, 117 opposite the cylinder chambers 115, 116 set.
- the dosing device 6 can therefore be used instead of the dosing device 6 as shown in FIG. 2 is shown, which is why only the design of the metering device 6 in 3 to 5 is described and the rest of the control arrangement or the sequence of Mixing corresponds to that described in FIG. 2.
- the supply line 41 is connected to an inlet port 120, which as Formed piece or connected to the inlet openings 37 and 38 via a piece is.
- Butterfly valves are between the inlet port 120 and the inlet openings 37, 38 43 and 44 arranged over a lever linkage with a through a cylinder piston assembly 121 formed switching device 45 are motionally connected.
- the Cylinder-piston arrangement 121 is on or on a support plate 122 on cylinder 100 another housing part, which also supports the cylinder 100, pivotable attached and rotatable with its piston rod 123 via a pivot lever 124 connected to a pivot axis 125.
- this pivot axis 125 is another pivotally connected to this pivot lever 126, which is connected via a push rod 127 with a swivel lever 128 in the area of the opposite inlet opening or outlet opening 38, 40 assigned to butterfly valves 44 and 47 is. Because of the one selected in particular from FIG. 3 and the right part of FIG. 5 Arrangement will not only be the butterfly valves leading to the return line 48 46 and 47, which are arranged upstream of the outlet openings 39, 40 for the pressure medium, but at the same time the butterfly valves 43 and 44, the inlet openings 37 and 38 are arranged for the pressure medium, operated.
- the additive e.g. Foam agent 25 is just sucked into the cylinder chamber 117 the foam agent 25 sucked into the cylinder chamber 114 in the previous stroke an outlet opening 60 and a check valve 63 of the pressure line 62 for the Foam agent 25 supplied.
- the Amount of additive or foam agent 25 to be mixed by the number of strokes the piston 106 and 107 regulated in the time unit.
- the in Fig. 2nd already described in detail control components and the control and / or display device 7 Use.
- the number of strokes is regulated Pistons 106, 107 by regulating the outlet cross-section to the return line 48 by means of the control device 52.
- an adjusting drive 98 for example a linear adjustment drive coupled with a stepper motor, via a swivel lever 129 rotatably with a pivot axis 130 of a metering flap 131 in the control device 52 connected. If the number of strokes in the cylinder piston arrangement has to be increased, the metering flap 131 is pivoted more so that it is larger Passage cross section in the control device 52 releases and thus a larger amount of liquid 14 are pumped through the cylinder chambers 115, 116 can.
- the piston rod can now be used to monitor the stroke movement of the pistons 106, 107 112 are used in an equivalent manner to the piston rod 33 according to FIG. 2 and accordingly, a measuring device 94 and limit switches 82, 83 are assigned to the latter be.
- any other monitoring device to use, with which the position of the pistons 106, 107 in the cylinder 100 and the Movement speed of the same can be monitored.
- this by means of the outside attached to the cylinder 100 interrogation organs, which on the Pistons 106 and / or 107 arranged sensors respond, monitor or to also provide the piston rod 105, in which case the corresponding measuring device 94 would be arranged in the distributor plate 101.
- FIG. 6 shows a variant of the dosing device 6.
- the order the admixing device 2 is shown in a very simplified manner and essentially corresponds that shown in Fig. 2. It is therefore the same for the same parts Reference numerals used.
- the extinguishing agent pump 4 is supplied with liquid 14 from the Extinguishing agent tank 3 supplied. After flowing through the pressure line 18 and the transmitter 8, the liquid 14 in the admixing line 19 with foam agent 25 the additive tank 5 and, for example, a group 10 of extinguishing agent outlets 11 provided.
- the metering device 6 consists of a rotating drive device 132, for example a vane pump 133 or an equivalent unit such as a rotary vane pump that is either single-stroke or can be multi-stroke, and also a rotating conveyor 134, which can be carried out in the same way with a vane pump 133 like the drive device 132.
- the drive device 132 and the conveyor device 134 are connected to one another in a rotationally fixed manner.
- a measuring device 94 by a Sensor 135 detects the speed of the drive device 132nd a rotor 136 of the vane pump 133 and transmits this via the connecting line 137 to the control and / or display device 7.
- the determined result is described by the control and / or display device 7 via the control line 53 to the adjustment drive 98 of the control device 52.
- this adjustment drive 98 as also already shown in FIG. 2 explains in detail the flow rate of the liquid 14 through the drive device 132 or vane pump 133 regulated so that due to the direct drive clutch the drive device 132 the conveyor device 134 the required amount of additive or foam agent 25 via the pressure line 62 of the admixing line 19 is supplied.
- the pressure difference required to add the foam agent 25 in the admixing line 19 becomes liquid 14 due to different diameters of the rotor 136 the drive device 132 and the rotor 136 of the conveyor device 134, i.e. due to the different total volume of the volume chambers of the drive device 132 and the conveyor 134 reached.
- Below the total volume of the volume chambers can be understood, for example, that with the same number of wings one Vane pump for the drive device 132 and the conveyor device 134 the sum of the volumes of the volume chambers between the individual wings at the Drive device 132 is larger than in conveyor device 134.
- the confluence of the pressure line 62 in the admixing line 19 should be higher in order to ensure that it is faultless To achieve admixture of the additive or foam agent 25.
- FIG. 7 shows another embodiment of the control and / or display device 138 for manual control to maintain the admixing ratio of one Mixing amount of foam agent 25 shown for a predefined amount of liquid 14.
- the structure of the admixing arrangement 2 is simplified in a block diagram shown.
- the metering device 6 essentially corresponds to that shown in FIG. and therefore the same reference numerals are used for the same parts.
- liquid 14 is taken out of an extinguishing agent tank 3 Pressurized and on the one hand the pressure device 18 of the drive device 30 provided and on the other hand mixed in the admixing line 19 with foam agent 25 and subsequently a group 10 of extinguishing agent outlets 11 are available posed.
- the foaming agent 25 is removed from the additive tank by means of the conveying device 27 5 sucked in and conveyed via the pressure line 62 into the admixing line 19 and added to the liquid 14 there.
- Control and / or display device 138 To regulate the mixing ratio between a predetermined amount of Liquid 14 and the amount of foam agent 25 to be added is manual Control and / or display device 138 is provided.
- the control and / or display device 138 consists of a display unit 139, for example in the driver's cabin an emergency vehicle or on a pump control station and spring-loaded pistons 140, 141, which in turn are pressurized via lines 142, 143 are.
- a measuring device 144 between the pressure line 18 and the admixing line 19 determines the flow rate of the liquid 14, which with a Foam agent 25 is to be added.
- a volumetric flask is used 146 and 147, respectively, whereupon this displaced them in a line 143, 142 Quantity of fluid, the pistons 141 and 140 of the control and / or display device 138 adjusted accordingly. As a result, the piston 141 moves together with the connected scale 148 against the spring force of the spring 149. Likewise, the piston 140 with a pointer 150 firmly connected to it against the spring force of the spring 151 moved.
- the pistons 140, 141 of the control and / or display device 138 are different shifted far. This creates a relative movement between the Pointer 150 and the scale 148.
- the display unit 139 can now on the basis of Position of the pointer 150 in relation to the scale 148 the current admixing ratio, for example given in percent between a liquid 14 and the one it contains Read off the amount of foam agent 25.
- the individual Pistons 140, 141 of measuring devices 144, 145 in lines 142 and 143 respectively to adjust the amount of fluid displaced in proportion to the size comparison made.
- the flow rate in the Area of foam agent 25 approximately 30 liters of additive 25 to 1000 liters of liquid 14 is, and therefore it is the transmission ratio between the measuring device 144 and the piston 141 or the scale 148 arranged thereon in relation to the Adjustment of the piston 140 with the pointer 150 arranged thereon, which via the Measuring device 145 is applied, approximately in a ratio of 100: 3 or 100: 1 to be determined.
- a manually operated control device 152 for controlling the admixing quantity is shown in the return line 48 between the drive device 30 and the suction line 17th arranged.
- the flow rate for the Operation of the drive device 30 required liquid 14 regulated.
- desired proportioning ratio can be set, in the case of a for the desired Admixture too low admixing factor on the display unit 139 the flow rate the liquid 14 for the drive device 30 increased and at a too high the amount of the liquid displayed on the display unit 139 14 can be reduced.
- Additives are mixed with this metering device 6 of a liquid 14.
- the measuring device and possibly the Control and / or display device 7.138 also simply possible, these as compact, to form self-transportable mixing devices that are independent of a vehicle or an extinguishing agent pump 4 e.g. operated via hose feed can.
- the control and / or display device 7.138 can have its own Power supply can be supplied with energy, or can be used to operate the same corresponding battery can be installed in such a compact device.
- the compressed air supply can also be done via a hose line. Alike would it be e.g. also possible using the reversal of the individual valves of diverted quantities of the extinguishing agent via hydraulic valves and hydraulically acted upon cylinders.
- FIG. 7 A possible arrangement of such an embodiment variant is shown in FIG. 7 with dash-dotted lines Lines shown.
- a liquid 14 via a line 153 to the changeover valve 80, one for this embodiment variant Hydraulic valve supplied.
- the switching device 45 in this case, turns on Hydraulic cylinder, alternately charged with liquid 14.
- the return of the Liquid 14 flows from the changeover valve 80 to the outside or via a line 154, e.g. to the extinguishing agent tank 3 or to the suction line of the extinguishing agent pump 4.
- This embodiment variant is preferably in the case of a transportable structural unit Use drive and conveyor device 27,30.
- a manual or mechanical control and / or display device 138 can be provided in such a compact device.
- the removal of the additive or foam agent 25 can be done via a Hose line e.g. also from portable canisters as additive tank 5.
- Transportable unit is that it is independent of stationary systems or vehicles at distant water tapping points for precise admixing of admixtures for different extinguishing agents can be used.
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Description
- Fig. 1
- eine erfindungsgemäße Zumischeinrichtung zum Herstellen von insbesondere schaumförmigem Löschmittel in einem Feuerwehrfahrzeug in Seitenansicht;
- Fig. 2
- ein schematisches Blockschaltbild einer Zumischeinrichtung zum Herstellen von insbesondere schaumförmigem Löschmittel unter Verwendung der erfindungsgemäßen Dosiervorrichtung;
- Fig. 3
- eine erfindungsgemäße Dosiervorrichtung in Stirnansicht;
- Fig. 4
- die erfindungsgemäße Dosiervorrichtung in Seitenansicht, geschnitten, gemäß den Linien IV-IV in Fig. 3;
- Fig. 5
- die erfindungsgemäße Dosiervorrichtung in Draufsicht, teilweise geschnitten dargestellt;
- Fig. 6
- eine Ausführungsvariante der erfindungsgemäßen Zumischeinrichtung unter Verwendung einer rotationsbewegten Antriebsvorrichtung bzw. Dosiervorrichtung in vereinfachter, schematischer Darstellung;
- Fig. 7
- eine Ausführungsform der Steuereinrichtung für manuelle Regelung zur Einhaltung des Zumischverhältnisses einer Zumischmenge an Zusatzmittel für eine vordefinierte Menge an Flüssigkeit in vereinfachter, schematischer Darstellung.
- 1
- Feuerwehrfahrzeug
- 2
- Zumischeinrichtung
- 3
- Löschmitteltank
- 4
- Löschmittelpumpe
- 5
- Zusatzmitteltank
- 6
- Dosiervorrichtung
- 7
- Steuer- und/oder Anzeige
- 8
- vorrichtung Meßwertgeber
- 9
- Löschmittelwerfer
- 10
- Gruppe
- 11
- Löschmittelausgang
- 12
- Gruppe
- 13
- Löschmittelausgang
- 14
- Flüssigkeit
- 15
- Tankauslaßleitung
- 16
- Absperrventil
- 17
- Ansaugleitung
- 18
- Druckleitung
- 19
- Zumischleitung
- 20
- Leitung
- 21
- Vergleicher
- 22
- Vergleicher
- 23
- Sollwertspeicher
- 24
- Eingabeorgan
- 25
- Schaummittel
- 26
- Leitung
- 27
- Fördervorrichtung
- 28
- Absperrventil
- 29
- Rückschlagventil
- 30
- Antriebsvorrichtung
- 31
- Zylinder
- 32
- Kolben
- 33
- Kolbenstange
- 34
- Kolbenstange
- 35
- Meßwertgeber
- 36
- Verbindungsleitung
- 37
- Einlaßöffnung
- 38
- Einlaßöffnung
- 39
- Auslaßöffnung
- 40
- Auslaßöffnung
- 41
- Versorgungsleitung
- 42
- Absperrventil
- 43
- Absperrklappe
- 44
- Absperrklappe
- 45
- Umschaltvorrichtung
- 46
- Absperrklappe
- 47
- Absperrklappe
- 48
- Rücklaufleitung
- 49
- Absperrventil
- 50
- Absperrventil
- 51
- Absperrventil
- 52
- Regelvorrichtung
- 53
- Steuerleitung
- 54
- Zylinder
- 55
- Kolben
- 56
- Kolbenstange
- 57
- Kolbenstange
- 58
- Einlaßöffnung
- 59
- Einlaßöffnung
- 60
- Auslaßöffnung
- 61
- Auslaßöffnung
- 62
- Druckleitung
- 63
- Rückschlagventil
- 64
- Leitung
- 65
- Leitung
- 66
- Absperrventil
- 67
- Absperrventil
- 68
- Leitung
- 69
- Absperrventil
- 70
- Leitung
- 71
- Leitung
- 72
- Absperrventil
- 73
- Absperrventil
- 74
- Spülleitung
- 75
- Leitung
- 76
- Absperrventil
- 77
- Hydrant
- 78
- Absperrventil
- 79
- Leitung
- 80
- Umschaltventil
- 81
- Stellantrieb
- 82
- Endschalter
- 83
- Endschalter
- 84
- Anschlagplatte
- 85
- Zylinderkammer
- 86
- Druckluftquelle
- 87
- Zylinderkammer
- 88
- Zylinderkammer
- 89
- Zylinderkammer
- 90
- Kreisringfläche
- 91
- Kreisringfläche
- 92
- Durchmesser
- 93
- Durchmesser
- 94
- Meßvorrichtung
- 95
- Lichtmaßstab
- 96
- Abtastkopf
- 97
- Markierung
- 98
- Nachstellantrieb
- 99
- Zylinderkolbenanordnung
- 100
- Zylinder
- 101
- Verteilerplatte
- 102
- Kolbenraum
- 103
- Kolbenraum
- 104
- Führung
- 105
- Kolbenstange
- 106
- Kolben
- 107
- Kolben
- 108
- Länge
- 109
- Stirnplatte
- 110
- Vorderseite
- 111
- Innenseite
- 112
- Kolbenstange
- 113
- Hublänge
- 114
- Zylinderkammer
- 115
- Zylinderkammer
- 116
- Zylinderkammer
- 117
- Zylinderkammer
- 118
- Durchmesser
- 119
- Durchmesser
- 120
- Einlaßstutzen
- 121
- Zylinderkolbenanordnung
- 122
- Stützlasche
- 123
- Kolbenstange
- 124
- Schwenkhebel
- 125
- Schwenkachse
- 126
- Schwenkhebel
- 127
- Schubstange
- 128
- Schwenkhebel
- 129
- Schwenkhebel
- 130
- Schwenkachse
- 131
- Dosierklappe
- 132
- Antriebsvorrichtung
- 133
- Flügelzellenpumpe
- 134
- Fördervorrichtung
- 135
- Meßwertgeber
- 136
- Rotor
- 137
- Verbindungsleitung
- 138
- Steuer- und/oder Anzeigevorrichtung
- 139
- Anzeigeeinheit
- 140
- Kolben
- 141
- Kolben
- 142
- Leitung
- 143
- Leitung
- 144
- Meßvorrichtung
- 145
- Meßvorrichtung
- 146
- Meßkolben
- 147
- Meßkolben
- 148
- Skala
- 149
- Feder
- 150
- Zeiger
- 151
- Feder
- 152
- Regelvorrichtung
- 153
- Leitung
- 154
- Leitung
Claims (20)
- Zumischeinrichtung zum Zumischen von Zusatzmitteln zu einer Flüssigkeit (14), insbesondere einem Löschmittel z.B. in Feuerwehrfahrzeugen mit einer Druckleitung (18) für die Flüssigkeit (14), mit einer in dieser angeordneten Meßeinrichtung, die durch einen Meßwertgeber (8) für die Durchflußmenge in dieser Druckleitung (18,19) gebildet ist, mit einer über eine Versorgungsleitung (41) an der Druckleitung (18,19) und eine Rückleitung angeschlossenen Antriebsvorrichtung (30,132) für eine Fördervorrichtung (27) für das Zusatzmittel von einem Zusatzmitteltank (5) über eine Zumischleitung, insbesondere eine Leitung (26), in eine Druckleitung (62) für das Zusatzmittel mit einer Regelvorrichtung (52) für die Durchflußmenge der Flüssigkeit (14) durch die Antriebsvorrichtung (30) in Abhängigkeit von der durch die Druckleitung (18,19) für die Flüssigkeit (14) hindurchströmenden Flüssigkeitsmenge, wobei die Antriebsvorrichtung (30,132) mit der Fördervorrichtung (27) bewegungsverbunden ist und die Druckleitung (62) für das Zusatzmittel in Strömungsrichtung der Flüssigkeit (14) nach dem Meßwertgeber (8) in die Druckleitung (19) für die Flüssigkeit (14) einmündet, dadurch gekennzeichnet, daß die Versorgungsleitung (41) für die Antriebsvorrichtung (30,132) in Fließrichtung der Flüssigkeit (14) vor dem Meßwertgeber (8) abzweigt und daß die Regelvorrichtung (52,152) in einer an der Antriebsvorrichtung (30,132) für die Durchflußmenge der Antriebsvorrichtung (30) anschließenden Rücklaufleitung angeordnet ist und daß an eine Steuer- und/oder Anzeigevorrichtung (7,138) der Meßwertgeber (8) der Meßeinrichtung, ein Eingabeorgan (24) für eine einer vorbestimmbaren Flüssigkeitsmenge zusetzbaren oder eine Meßvorrichtung (145) zum Feststellen der zugeführten Menge an Zusatzmitteln angeschlossen ist.
- Zumischeinrichtung nach Patentanspruch 1, dadurch gekennzeichnet, daß an der Steuer- und/oder Anzeigevorrichtung (7) eine Meßvorrichtung (94) für eine Bewegungsgeschwindigkeit, insbesondere die Hub- bzw. Rotationsgeschwindigkeit der Antriebsvorrichtung (30,132) angeschlossen ist.
- Zumischvorrichung nach Patentanspruch 1 oder 2, dadurch gekennzeichnet, daß ein Ausgang der Steuer- und/oder Anzeigevorrichtung (7) an einem Nachstellantrieb (98) der Regelvorrichtung (52) angeschlossen ist.
- Zumischeinrichtung nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Volumen der als Volumskammern wirkenden Zylinderkammern (85, 87) der Antriebsvorrichtung (30,132) größer ist als das Volumen in den als weitere Volumskammern wirkenden Zylinderkammern (88, 89) der Fördervorrichtung (27,134).
- Zumischeinrichtung nach einem oder mehreren der Ansprüche 1 oder 4, dadurch gekennzeichnet, daß die beiden Kolben (106, 107) der Antriebs- und Fördervorrichtung (30,27) auf einer gemeinsamen Kolbenstange (105) angeordnet sind, die in einer zwischen diese aufnehmenden Zylinder (100) angeordneten Verteilerplatte (101) geführt ist.
- Zumischeinrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Zylinderkammern (114,117) zwischen den beiden Kolben (106, 107) und der Verteilerplatte (101) die Fördervorrichtung (27) und die zwischen den Kolben (106,107) und den Stirnplatten (109) der diesen zugeordneten Zylinder (100) angeordneten Zylinderkammern (115,116) die Antriebsvorrichtung (30) bilden.
- Zumischeinrichtung nach einem oder mehreren der Ansprüche 5 bis 6, dadurch gekennzeichnet, daß eine Leitung (26) zwischen der Fördervorrichtung (27) und dem Zusatzmitteltank (5) und eine Druckleitung (62) zwischen der Fördervorrichtung (27) und der Zumischleitung (19) in die Verteilerplatte (101) münden.
- Zumischeinrichtung nach einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß zwischen der Leitung (26) und der Druckleitung (62) Rückschlagventile (29, 63) angeordnet sind.
- Zumischeinrichtung nach einem oder mehreren der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß ein Volumen von als Volumskammern wirkenden Saug- bzw. Druckkammern einer rotierenden Antriebsvorrichtung (132) und Fördervorrichtung (134) unterschiedlich groß ist und daß das Volumen der Volumskammern der Antriebsvorrichtung (132) größer ist als das der Fördervorrichtung (134).
- Zumischeinrichtung nach einem oder mehreren der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß mehrere Antriebs- (30, 132)und/oder Fördervorrichtungen (27,134) parallel geschaltet sind.
- Zumischeinrichtung nach einem oder mehreren der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Antriebsvorrichtung (132) und/oder die Fördervorrichtung (134) mehrstufig ausgebildet ist.
- Zumischeinrichtung nach einem oder mehreren der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Regelvorrichtung (152) als manueller Schieber ausgebildet ist und im Bereich einer Anzeigeeinheit (139) angeordnet ist.
- Zumischeinrichtung nach einem oder mehreren der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß die Anzeigeeinheit (139) durch zwei verstellbare Kolben (140, 141) gebildet ist, die über ein Druckmittel in einer Leitung (142, 143) mit jeweils einem Meßkolben (146, 147) der Meßvorrichtungen (144, 145) bewegungsverbunden sind und daß auf einem Kolben (140) ein Zeiger (150) und an einem anderen Kolben (141) eine Skala (148) befestigt ist und der Zeiger (150) und die Skala (148) parallel zueinander verschiebbar gelagert sind und die Kolben (140, 141) unter einer in Richtung der Meßkolben (146, 147) gerichteten Vorspannung von Federn (149, 151) stehen.
- Zumischeinrichtung nach einem oder mehreren der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß bei einer durch eine Zylinderkolbenanordnung gebildeten Antriebsvorrichtung (30) einer Kolbenstange (33) zwei Endschalter (82, 83) zugeordnet sind, die jeweils in den Endlagen des Kolbens (32) bevorzugt über eine Anschlagplatte (84) abwechselnd beaufschlagt sind und jeder der Endschalter (82, 83) mit einem Stellantrieb (81) eines Umschaltventils (80) verbunden ist, welches eine Druckmittelzufuhr von einer Druckluftquelle (86) zu einem Antrieb der Umschaltvorrichtung (45) beaufschlagt, wobei die Stellung des Umschaltventils (80) jeweils bei Beaufschlagung eines Endschalters (82, 83) im Sinne einer Bewegungsumkehr des Kolbens (32) beaufschlagt ist.
- Zumischeinrichtung nach einem oder mehreren der Ansprüche 1 bis 14, dadurch gekennzeichnet, daß einer Kolbenstange (33) der Antriebsvorrichtung (30) eine Meßvorrichtung (94) bestehend aus einem Abtastkopf (96) und einem Lichtmaßstab (95) zugeordnet ist und die Steuer- und/oder Anzeigevorrichtung (7) zur Auswertung der Relativgeschwindigkeit zwischen dem Lichtmaßstab (95) und dem Abtastkopf (96) ausgebildet ist.
- Zumischeinrichtung nach einem oder mehreren der Ansprüche 1 bis 15, dadurch gekennzeichnet, daß die Antriebs- und Fördereinrichtung (30,27) mit der Meßeinrichtung und der Regelvorrichtung (52) sowie gegebenenfalls der Steuer- und/oder Anzeigevorrichtung (7,138) eine transportable Baueinheit bilden.
- Zumischeinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Antriebsvorrichtung (132) und/oder die Fördervorrichtung (134) durch eine rotierende Pumpe, z.B. Flügelzellenpumpe (133) bzw. Radialkolbenpumpe oder Axialkolbenpumpe oder dgl. gebildet ist.
- Verfahren zum Zumischen von Zusatzmitteln zu einer Flüssigkeit, insbesondere einem Löschmittel, bei dem eine Durchflußmenge einer unter Druck stehenden Flüssigkeit ermittelt wird, ein Teil dieser Flüssigkeit einer Antriebsvorrichtung zugeführt wird, die mit einer Fördervorrichtung für ein Zusatzmittel gekuppelt ist und mit der das Zusatzmittel von einem Zusatzmitteltank einer Zumischleitung zugeführt wird und die Fördermenge des Zusatzmittels über die Regelung der Durchflußmenge der Flüssigkeit durch die Antriebsvorrichtung in Abhängigkeit von der Durchflußmenge an Löschmittel geregelt wird, dadurch gekennzeichnet, daß die Flüssigkeit für die Antriebsvorrichtung vor der Feststellung der Fördermenge der Flüssigkeit zu jenen Löschmittelausgängen, die mit einem Gemisch aus Lösch- bzw. Zusatzmittel versorgt werden sollen, abgezweigt wird und daß für die Regelung die Durchflußmenge nach der Abzweigung von Flüssigkeit zur Antriebsvorrichtung und vor dem Zusatz des Zusatzmittels ermittelt wird und daß die Durchflußmenge der Flüssigkeit durch die Antriebsvorrichtung zusätzlich nach der Antriebsvorrichtung in Abhängigkeit von der jeweils zuzusetzenden Menge an Zusatzmittel geregelt wird.
- Verfahren nach Anspruch 18, dadurch gekennzeichnet, daß die Rotationsgeschwindigkeit bzw. die Hubgeschwindigkeit der Antriebsvorrichtung ermittelt und die Abhängigkeit von der Durchflußmenge des Löschmittels bzw. der Flüssigkeit zu den Löschmittelausgängen geregelt wird.
- Verfahren von Anspruch 18 oder 19, dadurch gekennzeichnet, daß die von der Antriebsvorrichtung austretende Flüssigkeit der Ansaugleitung der Löschmittelpumpe bzw. einem der Löschmittelpumpe vorgeordneten Löschmitteltank zugeführt wird.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0202893A AT401693B (de) | 1993-10-08 | 1993-10-08 | Zumischeinrichtung zum zumischen von zusatzmitteln zu einer flüssigkeit |
| AT2028/93 | 1993-10-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0647458A1 EP0647458A1 (de) | 1995-04-12 |
| EP0647458B1 true EP0647458B1 (de) | 1999-01-13 |
Family
ID=3526254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94115756A Expired - Lifetime EP0647458B1 (de) | 1993-10-08 | 1994-10-06 | Zumischeinrichtung zum Zumischen von Zusatzmitteln zu einer Flüssigkeit |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0647458B1 (de) |
| AT (1) | AT401693B (de) |
| DE (1) | DE59407639D1 (de) |
| ES (1) | ES2128485T3 (de) |
| FI (1) | FI109458B (de) |
| NO (1) | NO943753L (de) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10013974A1 (de) | 2000-03-21 | 2001-10-04 | Andreas Vigh | Pumpendruckseitig angeordnetes Zumischgerät mit und ohne Druckluftverwendung |
| US6684959B1 (en) * | 2002-08-02 | 2004-02-03 | Pierce Manufacturing Inc. | Foam concentrate proportioning system and methods for rescue and fire fighting vehicles |
| DE102019215406A1 (de) * | 2019-10-08 | 2021-04-08 | Firedos Gmbh | Zumischsystem für Feuerlöschanlagen |
| DE202019004525U1 (de) * | 2019-11-05 | 2021-02-10 | Firedos Gmbh | Zumischsystem für Feuerlöschanlagen |
| CN115335601A (zh) * | 2020-03-31 | 2022-11-11 | 固瑞克明尼苏达有限公司 | 用于多组分喷涂系统的电操作泵 |
| CN114963018B (zh) * | 2022-06-01 | 2024-04-16 | 江苏美亚科泽过滤技术有限公司 | 间歇输送管路的流体添加装置及间歇输送管路系统 |
| CN115581880B (zh) * | 2022-11-10 | 2023-04-21 | 重庆消防安全技术研究服务有限责任公司 | 一种便携移动式低层消防救援装置 |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3642072A (en) * | 1969-10-08 | 1972-02-15 | Factory Mutual Res Corp | Fixed tire extinguishing system with additive injection apparatus |
| US4064891A (en) * | 1974-06-06 | 1977-12-27 | Hale Fire Pump Company | Plural fluid proportioning apparatus |
| CH595850A5 (en) * | 1975-05-02 | 1978-02-28 | Vogt Ag Oberdiessbach | Fire fighting equipment with hand held nozzles |
| US4324294A (en) * | 1979-02-07 | 1982-04-13 | John McLoughlin | Chemical injection control system for fire fighting |
| US4345654A (en) * | 1980-10-06 | 1982-08-24 | Carr Stephen C | Pneumatic atomizing fire fighting supply truck |
| DE3038334A1 (de) * | 1980-10-10 | 1982-10-21 | Albert Ziegler Gmbh & Co Kg, 7928 Giengen | Einrichtung fuer feuerloeschfahrzeuge zum zumischen eines schaum- oder filmbildenden zusatzmittels zum loeschwasserstroms |
| DE3131522A1 (de) * | 1981-08-08 | 1983-04-21 | Jürgen Dipl.-Ing. 4800 Bielefeld Kornfeld | Einrichtung zum dosierten einbringen von fluessigen zusaetzen zu einer unter druck stroemenden fluessigkeit |
| GB8401015D0 (en) * | 1984-01-14 | 1984-02-15 | Rose R A L | Liquid additive induction system |
| DE3726672A1 (de) * | 1986-10-09 | 1988-04-14 | Total Feuerschutz Gmbh | Einrichtung fuer feuerloeschfahrzeuge mit einem automatischen, elektronisch gesteuerten zumischer |
| US5174383A (en) * | 1988-09-08 | 1992-12-29 | Hypro Corporation | Apparatus and method for controlling the introduction of chemical foamant into water stream in fire-fighting equipment |
| US5085278A (en) * | 1990-10-15 | 1992-02-04 | T. D. F. Partnership | Foam proportioning inductor apparatus |
-
1993
- 1993-10-08 AT AT0202893A patent/AT401693B/de not_active IP Right Cessation
-
1994
- 1994-10-05 FI FI944646A patent/FI109458B/fi not_active IP Right Cessation
- 1994-10-06 NO NO943753A patent/NO943753L/no not_active Application Discontinuation
- 1994-10-06 EP EP94115756A patent/EP0647458B1/de not_active Expired - Lifetime
- 1994-10-06 DE DE59407639T patent/DE59407639D1/de not_active Expired - Fee Related
- 1994-10-06 ES ES94115756T patent/ES2128485T3/es not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FI944646A7 (fi) | 1995-04-09 |
| FI109458B (fi) | 2002-08-15 |
| NO943753D0 (no) | 1994-10-06 |
| ATA202893A (de) | 1996-03-15 |
| NO943753L (no) | 1995-04-10 |
| AT401693B (de) | 1996-11-25 |
| EP0647458A1 (de) | 1995-04-12 |
| FI944646A0 (fi) | 1994-10-05 |
| ES2128485T3 (es) | 1999-05-16 |
| DE59407639D1 (de) | 1999-02-25 |
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