CN207856125U - Used in fire-fighting positive-pressure type big flow foam proportioning system - Google Patents
Used in fire-fighting positive-pressure type big flow foam proportioning system Download PDFInfo
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- CN207856125U CN207856125U CN201721824006.6U CN201721824006U CN207856125U CN 207856125 U CN207856125 U CN 207856125U CN 201721824006 U CN201721824006 U CN 201721824006U CN 207856125 U CN207856125 U CN 207856125U
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Abstract
A kind of used in fire-fighting positive-pressure type big flow foam proportioning system, belongs to mobile fire control technology field.Including foam pump, foam tank, proportional controller, mixing tube, foam state monitoring protection circuit, foam flow sensing circuit, water flow detection circuit, feedback circuit, ratio valve regulation circuit and Interactive control unit, foam state monitoring protection circuit, foam flow sensing circuit, water flow detection circuit and feedback circuit are electrically connected with Interactive control unit respectively, the foam state monitoring protection circuit connection foam tank, the water flow detection circuit connection mixing tube, feedback circuit connects foam pump and ratio valve regulation circuit, ratio valve regulation circuit connects Interactive control unit by proportional controller.Advantage：Foam pump can be exported with accurate ratio needed for foam, in the range of the flow of foam pump increases, and the ratio of foam and water can maintain setting always；System operatio is simple, easy to maintain and reliable and stable.
Description
Technical field
The utility model belongs to mobile fire control technology field, and in particular to a kind of used in fire-fighting positive-pressure type big flow bubble
Foam proporting system.
Background technology
Common fire fighting truck type foam mixing system is divided into two classes：Suction type type foam mixing system and positive-pressure type foams mix system
System.Both type foam mixing systems require that water mixes according to a certain percentage with foam, to reach best extinguishing effect.Its
In, suction type type foam mixing system is a kind of circular pump type system, relatively simple for structure, but to the pressure and water pump of pump intake
The pressure difference of intake-outlet has very high requirement, is normally only used for easy bicycle fire-fighting fire extinguishing.Positive-pressure type froth ratio mixed stocker
System overcomes the deficiency of suction type, actively injects foam into water according to a certain percentage using foam pump, is filled through foam and water
It puts out a fire after dividing mixing.Further, in order to improve injection efficiency, foam pump generally uses positive displacement pump, and goes out in foam
Mouth installation check valve, makes foam pressure be consistently greater than the pressure of water.In addition, foam pump is usually all driven using direct current generator
It is dynamic, but on fire fighting truck, due to being limited by alternator for vehicle and battery capacity, the power of direct current generator can not be arranged compared with
Greatly, froth ratio is limited when this can cause big flow to supply water, to cannot be satisfied foam use demand when big flow.
In view of above-mentioned prior art, it is necessary to the structure of existing fire fighting truck type foam mixing system is improved, for this purpose,
The applicant has made beneficial design, and technical solution described below generates in this background.
Invention content
The purpose of this utility model is to provide a kind of used in fire-fighting positive-pressure type big flow foam proportioning system, operations
Simply, easy to maintain and reliable and stable, it can realize accurate froth ratio control.
What the purpose of this utility model was such to reach, a kind of used in fire-fighting positive-pressure type big flow froth ratio mixed stocker
System, including foam pump, foam tank, proportional controller and the mixing tube in the external water route of connection, it is characterised in that：It further include foam
Condition monitoring protect circuit, foam flow sensing circuit, water flow detection circuit, feedback circuit, ratio valve regulation circuit and
Interactive control unit, the foam state monitoring protection circuit, foam flow sensing circuit, water flow detection circuit and
Feedback circuit is electrically connected with the Interactive control unit respectively, the foam state monitoring protection circuit connection foam
Tank, the water flow detection circuit connection mixing tube, feedback circuit the connection foam pump and ratio valve regulation circuit,
The ratio valve regulation circuit passes through the proportional controller connection Interactive control unit.
In a specific embodiment of the utility model, the ratio valve regulation circuit includes hydraulic pump, ratio
Regulating valve and hydraulic motor, the feedback circuit include speed probe and pressure sensor, foam flow inspection
Slowdown monitoring circuit includes foam flowmeter, and the water flow detection circuit includes water ga(u)ge, foam state monitoring protection
Circuit includes check valve, foam low liquid level switch, filter and relief valve, the side power takeoff of the hydraulic pump and fire fighting truck
It is sequentially connected, while being connect by fluid pressure line with hydraulic motor further through ratio adjusting valve, hydraulic motor and the foam
Pump drive connects, and ratio adjusting valve is electrically connected with the proportional controller, and the speed probe is disposed in foam pump
Side, the rotating speed for measuring foam pump, the foam pump are connected on the foam tank by the first piping connection foam tank
It is connected to the second pipeline, second pipeline is mixed by third piping connection foam pump, while further through the 4th pipeline connection
Pipe, the pressure sensor are arranged on third pipeline, and the foam flowmeter and check valve are arranged at intervals on the 4th pipe
On the road and check valve is between foam flowmeter and mixing tube, and the water ga(u)ge is mounted on the water inlet end of mixing tube,
Flow for measuring water inlet, foam low liquid level switch is arranged on the outside of foam tank and the lower end of corresponding foam tank, institute
The filter stated is arranged on the first pipeline, and the relief valve is arranged on the second pipeline, the Interactive control unit
Respectively with speed probe, pressure sensor, foam flowmeter, water ga(u)ge, foam low liquid level switch and proportional controller
Electrical connection.
The utility model compared with prior art, has an advantageous effect in that due to the above structure,：The liquid
Pressure motor makes foam pump export required foam in precise proportions by adjusting the rotating speed of foam pump, and the flow of foam pump increases
Greatly, and in the range of the ratio of foam and water can maintain setting always；System operatio is simple, and easy to maintain and stabilization can
It leans on.
Description of the drawings
Fig. 1 is the principles of the present invention block diagram.
Fig. 2 is the electrical connection schematic diagram of the utility model.
In figure：1. hydraulic pump；2. ratio adjusting valve；3. hydraulic motor；4. speed probe；5. pressure sensor；6. bubble
Foam flowmeter；7. check valve；8. water ga(u)ge；9. foam low liquid level switchs；10. filter；11. relief valve；12. the first pipe
Road；13. the second pipeline, 14. third pipelines；15. the 4th pipeline.
Specific implementation mode
In order to enable the public to fully understand the technical essence of the utility model and advantageous effect, applicant will combine below
Specific embodiment of the present utility model is described in detail in attached drawing, but applicant is not to technical solution to the description of embodiment
Limitation, it is any to change in the form rather than substance the protection model that all should be considered as the utility model according to the utility model design
It encloses.
Referring to Fig. 1, the utility model is related to a kind of used in fire-fighting positive-pressure type big flow foam proportioning systems, including
Foam pump, foam tank, proportional controller and the mixing tube in the external water route of connection, it is characterised in that：It further include foam state prison
Control protection circuit, foam flow sensing circuit, water flow detection circuit, feedback circuit, ratio valve regulation circuit and interactive mode
Control unit, foam state monitoring protection circuit, foam flow sensing circuit, water flow detection circuit and feedback electricity
Road is electrically connected with the Interactive control unit respectively, the foam state monitoring protection circuit connection foam tank, flow
The detection circuit connection mixing tube is measured, feedback circuit the connection foam pump and ratio valve regulation circuit are described
Ratio valve regulation circuit passes through the proportional controller connection Interactive control unit.
Referring to Fig. 2, specifically, the ratio valve regulation circuit includes hydraulic pump 1, ratio adjusting valve 2 and hydraulic pressure
Motor 3, the feedback circuit include speed probe 4 and pressure sensor 5, and the foam flow sensing circuit includes bubble
Foam flowmeter 6, the water flow detection circuit include water ga(u)ge 8, and foam state monitoring protection circuit includes single
To valve 7, foam low liquid level switch 9, filter 10 and relief valve 11.The side power takeoff of the hydraulic pump 1 and fire fighting truck passes
Dynamic connection, while being connect by fluid pressure line with hydraulic motor 3 further through ratio adjusting valve 2.Hydraulic motor 3 and the foam
Pump is direct-connected by connecting shaft, and measure speed gears are equipped in connecting shaft.There is hydraulic motor 3 minimum operating speed and highest work to turn
Speed, speed probe 4, which measures the rotating speed of foam pump by measure speed gears and feeds back tach signal, gives Interactive control unit, by handing over
Mutual formula control unit adjusts the aperture of ratio adjusting valve 2.The hydraulic pump 1 by ratio adjusting valve 2 come to hydraulic motor 3 into
Row speed governing drives foam pump operating by hydraulic motor 3.The hydraulic motor 3 makes foam by adjusting the rotating speed of foam pump
Pump export in proportion needed for foam, the flow of foam pump reach as high as 40 liters it is per second.Ratio adjusting valve 2 is controlled with the ratio
Device is electrically connected.The foam pump connects foam tank by the first pipeline 12, and the second pipeline 13 is connected on the foam tank,
Second pipeline 13 connects foam pump by third pipeline 14, while being connected to mixing tube further through the 4th pipeline 15.It is described
Pressure sensor 5 be arranged on third pipeline 14, the foam flowmeter 6 and check valve 7 are arranged at intervals on the 4th pipeline
On 15 and check valve 7 is between foam flowmeter 6 and mixing tube, and the water ga(u)ge 8 is mounted on the water inlet of mixing tube
End can avoid the interference detected to water flow when water and foams mix.The speed probe 4, pressure sensor 5, bubble
Foam flowmeter 6, water ga(u)ge 8 and proportional controller are electrically connected with Interactive control unit respectively.In the present embodiment, rotating speed
Sensor 4 uses DW-AS-621-M8-001, pressure sensor 5 that 0-16bar/1-6V, foam flowmeter 6 is used to use
F3.00.H.02, water ga(u)ge 8 use XE-MF10F-SOA, other elements that conventional products can be used.
First, current practical water flow is detected by water ga(u)ge 8, while foam flowmeter 6 detects current foam
Testing result is simultaneously sent into Interactive control unit by flow, and the Interactive control unit is sentenced according to the froth ratio of setting
Whether the current foam flow value that breaks meets the proportion requirement of foam.If foam flow is excessive and exceeds error range, ratio
Regulating valve 2 reduces aperture, and the rotating speed of foam pump is made to decline, and reduces foam supply；Conversely, if foam flow is too small and exceeds error
Range, then the increase of ratio adjusting valve 2 aperture, makes foam revolution speed increase, and increases foam supply.Pass through above-mentioned closed loop control as a result,
The ratio of system, foam and water can be maintained always in the range of setting.After foam flowmeter 6 stalls for some reason,
Interactive control unit will be automatically switched into replaces foam flow detection with foam pump Rotating speed measring.Foam revolution speed is gone back simultaneously
As the foundation of foam pump speed limit, when the excessively low reason of foam tank liquid level causes foam pump inlet to lack liquid, foam pump stalling, together
When by foam low liquid level switch 9 to Interactive control unit 91 send out fault message.
In the present embodiment, the foam low liquid level switch 9 uses MFP-11B, setting outside foam tank and right
It should be electrically connected with Interactive control unit in the lower end of foam tank, foam low liquid level switch 9.The described setting of filter 10 is the
On one pipeline 12, the relief valve 11 is arranged on the second pipeline 13.The pressure sensor 5 for measuring foam in real time
The pressure of pipeline, when observed pressure is more than the rated pressure of foam pump, relief valve 13 is opened, and foam is made to be returned through the second pipeline 13
It flow in foam tank.If foam pressure is still excessively high within a certain period of time, further protected by reducing foam revolution speed.
The speed probe 4 measures the rotating speed of foam pump, when rotating speed is more than the upper limit of revolution speed or when less than the lower limit of revolution speed,
By the aperture of proportional controller volitional check ratio adjusting valve 2, the rotating speed of foam pump is made to maintain rational operation interval.Work as institute
After the foam low liquid level switch 9 stated acts, ratio adjusting valve 2 is closed, and foam pump operating is made to stop, to prevent dry grinding damage occurs
Problem.
In the present embodiment, the Interactive control unit is using automobile-used Width funtion electric control product, concrete model
TERA, degree of protection IP65, strong antijamming capability.Interactive control unit has human-computer interaction interface, is used for real-time display stream
Amount, pressure, froth level, tachometer value, while each sensor can be demarcated by interface, prompt message and failure letter are sent out in real time
Breath.Froth ratio can be also set by man-machine interface, and adjustable range is between 0.1%-10% and to adjust step-length arbitrary, realizes accurate
Froth ratio control.System operatio is simple, easy to maintain and reliable and stable, can be used for the mobile fire extinguishing of petrochemical industry class fire.
Claims (2)
1. a kind of used in fire-fighting positive-pressure type big flow foam proportioning system, including foam pump, foam tank, proportional controller with
And the mixing tube in the external water route of connection, it is characterised in that：Further include foam state monitoring protection circuit, foam flow detection electricity
Road, water flow detection circuit, feedback circuit, ratio valve regulation circuit and Interactive control unit, foam state prison
Control protection circuit, foam flow sensing circuit, water flow detection circuit and feedback circuit respectively with the Interactive control
Unit is electrically connected, the foam state monitoring protection circuit connection foam tank, the water flow detection circuit connection mixing
Pipe, feedback circuit the connection foam pump and ratio valve regulation circuit, the ratio valve regulation circuit pass through ratio control
The device connection processed Interactive control unit.
2. used in fire-fighting positive-pressure type big flow foam proportioning system according to claim 1, it is characterised in that described
Ratio valve regulation circuit include that hydraulic pump (1), ratio adjusting valve (2) and hydraulic motor (3), the feedback circuit include
Speed probe (4) and pressure sensor (5), the foam flow sensing circuit include foam flowmeter (6), the water
Flow sensing circuit includes water ga(u)ge (8), and foam state monitoring protection circuit includes check valve (7), the low liquid of foam
Bit switch (9), filter (10) and relief valve (11), the hydraulic pump (1) and the side power takeoff of fire fighting truck are sequentially connected,
It is connect simultaneously by fluid pressure line with hydraulic motor (3) further through ratio adjusting valve (2), hydraulic motor (3) and the foam
Pump drive connects, and ratio adjusting valve (2) is electrically connected with the proportional controller, and the speed probe (4) is disposed in bubble
The side of foam pump, the rotating speed for measuring foam pump, the foam pump connects foam tank by the first pipeline (12), described
The second pipeline (13) is connected on foam tank, second pipeline (13) connects foam pump by third pipeline (14), simultaneously
It is connected to mixing tube further through the 4th pipeline (15), the pressure sensor (5) is arranged on third pipeline (14), the bubble
Foam flowmeter (6) and check valve (7) are arranged at intervals on the 4th pipeline (15) and check valve (7) is between foam flowmeter (6)
Between mixing tube, the water ga(u)ge (8) is mounted on the water inlet end of mixing tube, and the flow for measuring water inlet is described
Foam low liquid level switch (9) is arranged on the outside of foam tank and the lower end of corresponding foam tank, and the filter (10) setting is the
On one pipeline (12), the relief valve (11) be arranged on the second pipeline (13), the Interactive control unit respectively with
Speed probe (4), pressure sensor (5), foam flowmeter (6), water ga(u)ge (8), foam low liquid level switch (9) and ratio
Csr controller is electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721824006.6U CN207856125U (en) | 2017-12-22 | 2017-12-22 | Used in fire-fighting positive-pressure type big flow foam proportioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721824006.6U CN207856125U (en) | 2017-12-22 | 2017-12-22 | Used in fire-fighting positive-pressure type big flow foam proportioning system |
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| Publication Number | Publication Date |
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| CN207856125U true CN207856125U (en) | 2018-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721824006.6U Active CN207856125U (en) | 2017-12-22 | 2017-12-22 | Used in fire-fighting positive-pressure type big flow foam proportioning system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107982829A (en) * | 2017-12-22 | 2018-05-04 | 苏州市捷达消防车辆装备有限公司 | Used in fire-fighting positive-pressure type big flow foam proportioning system |
-
2017
- 2017-12-22 CN CN201721824006.6U patent/CN207856125U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107982829A (en) * | 2017-12-22 | 2018-05-04 | 苏州市捷达消防车辆装备有限公司 | Used in fire-fighting positive-pressure type big flow foam proportioning system |
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