CN207545664U - The intelligent froth ratio mixed layout structure of Integral positive/negative pressure - Google Patents
The intelligent froth ratio mixed layout structure of Integral positive/negative pressure Download PDFInfo
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- CN207545664U CN207545664U CN201720401242.0U CN201720401242U CN207545664U CN 207545664 U CN207545664 U CN 207545664U CN 201720401242 U CN201720401242 U CN 201720401242U CN 207545664 U CN207545664 U CN 207545664U
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Abstract
The utility model provides a kind of intelligent froth ratio mixed layout structure of Integral positive/negative pressure, including foam tank, water pot, positive pressure system, negative pressure system and control system；Positive pressure system includes foam pump, foam transfer valve and prefill valve；Negative pressure system includes pressure water valve, positive pressure foam valve and Venturi tube；Control system includes electrically-controlled valve and programmable logic controller (PLC)；Wherein foam tank is connect with foam pump, and foam tank is connect by electrically-controlled valve with Venturi tube and positive pressure foam valve；Water pot is connect with Venturi tube and positive pressure foam valve.The intelligent froth ratio mixed layout structure of the utility model Integral positive/negative pressure has the following advantages：The system integration all control programs of positive/negative-pressure foam proportioning system, utilize programming powerful CPU, control function, 2 systems are organically combined, provide the utilization rate of system hardware, 2 respective operation modes of system are simplified simultaneously, and need to only operate a key can carry out the mutual switching of positive/negative-pressure system.
Description
Technical field
The utility model is related to fire fighting truck equipment fields, and in particular, to a kind of positive-negative pressure integrated intelligence froth ratio
Hybrid system.
Background technology
Now with the high speed development of China's science and technology, in fire protection sector field, particularly foam truck field, take
Great development was obtained, forereached foreign well-known enterprise, and current China's foam truck mainly equips following foam ratio
Example hybrid system.
Suction type foam proportioning system：Domestic more than 85% foam truck is equipped with the system, has cost
Low, easy for installation, the advantages that control accuracy is high, multiple functional, and reliability is high, easy to operate.Unique deficiency is can only bicycle work
War, can only carry out fire fighting and rescue with this system, adapt to medium and small fire.For port and pier, petroleum chemical enterprise, large-scale petrochemical storehouse
The fire fighting and rescue of the large-sized fire in library seems unable to do what one wishes.
Positive-pressure type foam proportioning system：There are large-scale stone in the drawbacks of to solve negative pressure system, current many petroleum chemical enterprises
The city for changing warehouse is equipped with and is mounted with the fire fighting truck of positive pressure foaming system, advantage be can more vehicles couplings use, carry out for a long time
Fire extinguishing, performs to the efficiency of fire pump ultimate attainment, and can carry out foam long-distance sand transport.Its deficiency be systematic comparison it is complicated, into
This height installs and uses trouble, and to chassis power demand height, poor reliability (negative relative system) is suitble to the fire extinguishing of large-sized fire,
There is no any advantage to medium and small fire.
How there is the function of negative pressure system on same vehicle, and have the function of positive pressure system, and cost and positive pressure
System is substantially similar, solves the worry in vehicle configuration for fire brigade, solves the problems, such as that this is mentioned by fire brigade
Agenda.
Patent of invention number：CN201510002760.0《A kind of pouring-in positive/negative-pressure froth ratio mixed stocker of foam truck
System》, centre point is, " positive pressure foam, negative pressure injection " its in negative pressure in use, there is still a need for starting foam pump, foam pump work
Rate is substantially greater than 15Kw, and engine in situ also works under full capacity, does not meet energy-saving and environment-friendly requirement, does not still have
Be detached from " positive pressure system " scope, be not negative pressure system truly, only the foam solution of former positive pressure system inject from
Pump outlet changes and is sent to pump intake, reduces the requirement to foam pump output pressure, and the only expansion of positive pressure system makes
With.
Utility model content
For the defects in the prior art, the utility model aim be to provide a kind of energy conservation and environmental protection, can a key switching
The intelligent froth ratio mixed layout structure of Integral positive/negative pressure of positive/negative-pressure.
In order to solve the above technical problems, the utility model provides a kind of intelligent froth ratio mixing cloth of Integral positive/negative pressure
Office's structure, including foam tank, water pot, positive pressure system, negative pressure system and control system；It is defeated that positive pressure system includes foam pump, foam
Send valve and prefill valve；Negative pressure system includes pressure water valve, positive pressure foam valve and Venturi tube；Control system includes electrically-controlled valve and can
Programmed logic controller；Wherein foam tank is connect with foam pump, and foam tank passes through electrically-controlled valve and Venturi tube and positive pressure foam valve
Connection；Water pot is connect with Venturi tube and positive pressure foam valve.
Preferably, the import of foam pump is connected by y-type filter, foam valve and foam tank；The outlet of foam pump passes through
Prefill valve is connect with foam tank；Single-phase valve is connected between the import of foam pump and the outlet of foam pump；The outlet of foam pump
It is connected by the import of return valve and foam pump；The outlet of foam pump connects respectively with foam transfer valve and the inlet of electrically-controlled valve
It connects.
Preferably, the outlet of electrically-controlled valve is connected by the water inlet of positive pressure foam valve and water pump；The water inlet of Venturi tube
It is connected by the water outlet of pressure water valve and water pump；The foam inlet of Venturi tube respectively with positive pressure foam valve, electrically-controlled valve
Outlet connection；The mixture export of Venturi tube and the water inlet of water pump connect.
Preferably, speed probe is equipped in foam pump.
Preferably, flushing valve is connected between y-type filter and the foam valve and outer for foam valve.
Preferably, foam two position sensor is equipped in foam tank, water two position sensor is equipped in water pot.
Preferably, foam pressure sensor and foam stream are connected between the outlet of foam pump and the inlet of electrically-controlled valve
Quantity sensor；Water pressure sensor and water flow sensor are connected between the water outlet and pressure water valve of water pump.
Compared with prior art, the intelligent froth ratio mixed layout structure of the utility model Integral positive/negative pressure have with
Lower advantage：The system integration all control programs of positive/negative-pressure foam proportioning system utilize programming powerful CPU, control
2 systems are organically combined, provide the utilization rate of system hardware by function, and operationally, while it is each to simplify 2 systems
From operation mode, and need to only operate a key and can carry out the mutual switching of positive/negative-pressure system, on the basis of positive pressure system
It is upper only to increase by 3 devices (2 electropneumatic valves, 1 Venturi tube), greatly reduce system cost, the institute in system
Have device, various functions are complete, complete, and integrated level is high, can fully provide the use scope of foam truck, meet wartime and
The various requirement of maintenance, the operation interface of hommization to operate extremely simple.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other spies of the utility model
Sign objects and advantages will become more apparent upon.
Fig. 1 is the intelligent froth ratio mixed layout structure structure diagram of the utility model Integral positive/negative pressure；
Fig. 2 a are the vacuum cavitations panels of the intelligent froth ratio mixed layout structure of the utility model Integral positive/negative pressure
Page figure；
Fig. 2 b are the over-pressure control panels of the intelligent froth ratio mixed layout structure of the utility model Integral positive/negative pressure
Page figure；
Fig. 3 is the PLC control principle drawings of the intelligent froth ratio mixed layout structure of the utility model Integral positive/negative pressure；
Fig. 4 is the parameter setting page of the intelligent froth ratio mixed layout structure of the utility model Integral positive/negative pressure；
Fig. 5 is the CPU control structure figures of the intelligent froth ratio mixed layout structure of the utility model Integral positive/negative pressure.
Specific embodiment
The utility model is described in detail with reference to specific embodiment.Following embodiment will be helpful to this field
Technical staff further understands the utility model, but does not limit the utility model in any form.It should be pointed out that ability
For the those of ordinary skill in domain, without departing from the concept of the premise utility, several variations can also be made and changed.
As shown in Figure 1, the intelligent foam proportioning system of positive-negative pressure integrated provided by the utility model.Wherein positive pressure
System includes：Foam pump 101, foam pressure sensor 103, foam transfer valve 105, speed probe 106, is filled return valve 102
Liquid valve 111.
Wherein negative pressure system includes：Pressure water valve 121, positive pressure foam valve 114, Venturi tube 127.
Wherein positive/negative-pressure system includes for device：Foam flow sensor 104, y-type filter 107, foam tank 108,
Foam valve 109, flushing valve 110, outer confession foam valve 112, foam two position sensor 113, electrically-controlled valve 115, programmable logic
Controller 116, display 117, CAN bus 118, chassis ECU119, engine in situ 120, water pot 122, water two position pass
Sensor 123, water pump 124, water pressure sensor 125, water flow sensor 126, Venturi tube 127, single-phase valve 128.
Under positive pressure system operating mode：101 import of foam pump is connect with foam tank 108, outlet and 115 import of electrically-controlled valve
Connection, the outlet of electrically-controlled valve 115 are connect by positive pressure foam valve 114 with 124 water inlet of water pump, and this connection mode, which disclosure satisfy that, to disappear
(0.6Mpa) is effectively mixed with pressure water when anti-pump water inlet mouth is positive pressure, and since the impeller of foam pump acts on, foam pumps out
The mixed liquor at the mouth of a river is thoroughly mixed, and provides the extinguishing effect of whole system.
Although the foam inlet of Venturi tube 127 and electrically-controlled valve 115 outlet connect, due to electrically-controlled valve 115 water inlet by
Blocking to pressure water valve 121 could not form vacuum suction effect in Venturi tube 127, and electrically-controlled valve 115 exports foam solution not
It can be sucked by Venturi tube 127, the water inlet of water pump 124 is only entered by positive pressure foam valve 114.
Single-phase 128 one end of valve is connect with 101 import of foam pump, the other end exports respectively with foam pump 101, electrically-controlled valve 115
Inlet connects.Under positive pressure operating mode, although single-phase valve 128 is connect by mouth with foam tank 108, due to foam pump
It is positive pressure that the turning effort of 101 gears, which forms negative-pressure adsorption and single-phase 128 import, and valve foam solution can only enter foam pump
Import, another aspect foam pump outlet outflow foam solution foam pump inlet cannot be then flowed under single-phase valve action.
Under negative pressure system operating mode：The water outlet that 127 water inlet of Venturi tube passes through pressure water valve 121 and water pump 124
Mouthful connection, 127 foam inlet of Venturi tube respectively with positive pressure foam valve 114, electrically-controlled valve 115, single-phase valve 128 and foam tank
108 connections, mixture export are connect with 124 water inlet of water pump.The water inlet of Venturi tube 127 is under the action of water-aspirator pressure water
Inside forms vacuum chamber and the foam solution of foam tank is adsorbed onto in Venturi tube by inlet, electrically-controlled valve, single-phase valve, by going out
Foam solution is transported to pump intake by liquid mouth, this is the operation principle of negative-pressure adsorption foam solution.
Two ends of positive pressure foam valve 114 respectively with the inlet of Venturi tube 127, electrically-controlled valve 115,124 water inlet of water pump
Connection.Purpose is in order to block Venturi tube inlet and Venturi tube mixture export intercommunication, so as to cause Venturi tube not
It can normal work.
System is organically combined 2 systems using the powerful programming Control functions of CPU, and positive/negative-pressure system is for device
Part accounts for whole system 2/3, and negative pressure system only accounts for 1/10, that is, simplifies operation and saved cost to the full extent, has only
Special novelty, practicability.
To positive-negative pressure integrated, the control mechanism of intelligent foam proportioning system does and further explains according to fig. 2~Fig. 5
It states.
Display 117 shows that negative pressure homepage 201, positive pressure homepage 210, negative pressure homepage 201 are also respectively connected with respectively
First Macintosh 202, the second Macintosh 203, third Macintosh 204, the 4th Macintosh 205, the 5th Macintosh 206, the 6th group
Close key 207, the 7th Macintosh 208, the 8th Macintosh 209.
Positive pressure homepage respectively with button throttle+211, throttle -212, tank foam key 213, it is outer for foam valve 214, setting
Key 215 connects.
5th Macintosh 206, the 6th Macintosh 207 can facilitate the conversion for carrying out positive/negative-pressure system and realize as needed just
The needs of negative-pressure operation function.
The major function of negative pressure homepage 201 includes：Automatic running, manual operation, auto-flushing, foam are inhaled outside.This is several
The institute that item function covers current suction type foam proportioner substantially is functional, can operationally be selected with a key, different
The comprehensive working condition for showing parameters and each valve of system under function has easy to operate, display full apparent
The characteristics of.
210 major function of positive pressure homepage therein：
Foam fire-fighting function：It presses the first Macintosh 202 to put out a fire, system is in fire extinguishing standby mode at this time, and tank may be selected
Foam key 213 carries out fire-extinguishing operations for foam key 214 outside.Tank foam key 213 is such as selected, system automatically opens foam solution valve
109th, positive pressure foam valve 114, electrically-controlled valve 115 aperture according to water flow and froth ratio requirement open certain angle, system its
Its parameters is shown on positive pressure homepage 301 in real time.
Foam conveying function：It presses the second Macintosh 203 to convey, system is in conveying standby mode at this time, and tank may be selected
Foam key 213 carries out outside for foam key 214, and such as selection is outer to carry out foam conveying for foam key 214, and system automatically opens outer confession
Foam valve 112, foam transfer valve 105, system can pressurize extraneous foam solution to other fire fighting trucks or other by foam pump 101
Place conveying.Condition is created to the coupling use of more vehicles.
Filling liquid function：204 filling liquid of third Macintosh is pressed, system automatically opens outer for foam valve 102, filling liquid at this time
Valve 111 adds to external world's foam in foam tank 108, fundamentally solves to the tired of the foam filling liquid of foam truck
It is difficult.
Pre-washing function：The 4th Macintosh 205 is pressed to rinse, at this time system automatically open pressure water valve 121, flushing valve 110,
Residual foam liquid in system after use is rinsed by electrically-controlled valve standard-sized sheet, one-touch auto-flushing truly,
System automatically returns to positive pressure homepage 210 after 30 seconds.
Since the relatively more but buttons of the function of positive pressure system are complicated, to prevent maloperation, basic function takes two-key type to open
It is dynamic effective, it is ensured that the safety of system.
Negative pressure homepage 201, positive pressure homepage 210 include：The 202~the 8th Macintosh 209 of first Macintosh, the first combination
The function under negative pressure state of key 202 is to use, used under barotropic state as fire-extinguishing function concurrently key, the second Macintosh as page turning key
203 under negative pressure state function be used as mode key, under barotropic state as conveying foam function key uses, third combine
The function under negative pressure state of key 204 be use as foam "ON" key, used under barotropic state as filling liquid function key, the 4th
The function under negative pressure state of Macintosh 205 be use as foam "Off" key, used under barotropic state as pre-washing function key,
Five Macintosh 206 function under negative pressure state is to open electrically-controlled valve 115 using at this time must being negative pressure state as manual "+" key
Manual operation mode uses, in parameter in negative pressure state automatic running pattern starting up as " positive pressure " function key is switched to
Setting 401 state of the page under used as 402 key of parameter " selection ", the 6th Macintosh 207 function under negative pressure state be as
It must be to be switched to " to bear under negative pressure state manual operation mode, barotropic state at this time that manual "-" key, which is closed electrically-controlled valve 115 and used,
Mode key uses, used under 401 state of parameter setting page as 403 key of parameter " confirmation " pressure ", the 7th Macintosh 208, the
Eight Macintosh 209 use, in 401 state of parameter setting page under negative pressure or barotropic model as froth ratio set key
Lower conduct setting coefficient " adding " " subtracts " key and uses.The power of CPU is utilized in design so that button on the system page according to
Different operating modes plays corresponding function, and Highgrade integration design has saved manufacture, installation cost, and extend use
Function has extremely strong novelty.
The input port of programmable logic controller (PLC) 116 includes：Speed probe 106, tank foam key 213, it is outer supply foam
Key 214 connects, water pressure sensor 125, foam pressure sensor 103 connect, set key 215, water two position sensor
123rd, foam two position sensor 113.
The output port of programmable logic controller (PLC) 116 includes：Audible-visual annunciator 309, is pressed+211 throttle -212 of throttle
Key, pressure water valve 121, positive pressure foam valve 114, foam valve 109, it is outer for foam valve 112, foam transfer valve 105, flushing valve 110,
Prefill valve 111, return valve 102.The various signals of sensor are passed through internal programmable logic control by programmable logic controller (PLC)
After the processing of the CPU of device, the information collected is sent to each output port, is communicated by CAN bus and other components,
Reach automatic control function, expanded system application range, improve system reliability.
The 14th pin (the first CANL) of programmable logic controller (PLC) 116, the 32nd pin 306 (the first CANH) with
Display 117, electrically-controlled valve 115 carry out communication connection, programmable logic controller (PLC) 116 the 6th pin (RxD), the 7th pin
305 (TxD) carry out effective communication by RS232 interface and computer programming device.
Electrically-controlled valve 115 also respectively with water flow sensor 126, foam flow sensor 104, this mode connect be in order to
It is more convenient accurately to control its valve opening, the accuracy of system is provided.
The 25th pin (the 2nd CANL), the 26th pin 307 (the 2nd CANH) of programmable logic controller (PLC) 116
It is connect with chassis ECU119, engine in situ 120 by CAN bus C1939 protocols, programmable logic controller (PLC) 116
The pwm signal that 36th pin (QX0.04), foot export with digital analog converter 310 by connecting, output simulation throttle signal
Control engine speed.And the output of digital throttle signal be received by programmable logic controller (PLC) throttle+, throttle-
The signal of button realizes control engine speed using the communication of CAN bus and chassis ECU.
System has been selected in hardware selection with two tunnel CAN bus, programmable logic controller (PLC) more advanced at present,
Purpose is to improve programmable logic controller (PLC) data processing, transmission communication function, because system of positive or negative pressure itself has just been deposited
Mass data has been stored up, if communicated using general bus, has easily caused signal blockage, crash can not work normally.CAN
Bus communication has abolished address coding, is encoded using communication data, and different nodes can be made to receive identical data simultaneously, made
The Realtime Capability of Communication obtained between each node of network is strong, and easily forms redundancy structure, improves high reliability and the spirit of system
Activity, two output terminal CAN-H-CAN-L of CAN bus are connected with physical bus, have fully ensured that the strong error correction detection energy of system
Power, moreover effective communication can not be carried out with chassis ECU if CAN bus underlying protocol, C1939 communications protocol is not used, it reaches
Less than the purpose of control engine in situ throttle, and different communications protocol is used per CAN bus all the way, fundamentally solved
The problem of being interfered with each other between bus, being adapted with the chassis EFI engine completely with state 5 discharge standard for the technology, has
There is certain novelty.
Set key 215 enters parameter setting page 401 after clicking, parameter setting page 401 connects the 3rd function key respectively：
Selection key 402, acknowledgement key 403, are also attached to：2nd function key：Digital plus key 404, number subtract key 405.
401 concrete function of parameter setting page is as follows：
" Chassis selection " has been internally integrated the ID communication codes of common fire fighting truck chassis special engine both at home and abroad, need to only pass through
Selection key 402 selects, and after acknowledgement key 403, system can monitor the parameters of selected engine in situ.
" parameter setting " is that the water of system, foam flow are consistent with actual flow to be set in order to adjust, to improve system
Foams mix than precision, improve efficiency, the coefficient adjustment actually put out a fire be by plus key 404, to subtract key 405, acknowledgement key 403 complete
Into.
This is a kind of application examples for having epoch-making breakthrough design concept, being rated as current new technology.Designer is near
In the past few years by inquiry with domestic and international chassis producer, link up plus actually groping to apply, by current fire fighting truck frequently with into
Mouthful, the whole write-in programmable logic controller (PLC)s of the data of the engine ID codes (communication code) on domestic chassis after actual argument
Inside is stored in programmable logic controller (PLC) CPU, several lower phases of " parameter setting " page simple operations that need to only enter with program mode (PM)
Close button, you can determine selected chassis, and control effectively to engine in situ parameter.The system has been expanded to the full extent
Application range, to production, use, maintenance all bring great convenience, be an epoch-making technological innovation.
As shown in figure 5, the system CPU control structure figure of the intelligent foam proportioning system of positive-negative pressure integrated includes：
Programmable logic controller (PLC) CPU, display CPU, electrically-controlled valve CPU, programmable logic controller (PLC) CPU respectively with outer button, sensing
Device connects, and outer button includes：Throttle+211, throttle -212, tank foam key 213, outer confession foam key 214, set key 215, sensing
Device includes：Foam pressure sensor 103, speed probe 106, foam two position sensor 113, water two position sensor
123rd, water pressure sensor 125.
Programmable logic controller (PLC) CPU is connect by the first CAN bus 306 with display CPU, electrically-controlled valve CPU respectively, also
Pass through the connection of the second CAN bus 307 and chassis ECU119, engine in situ 120.
Wherein the first CAN bus 306 establishes data communication using general communication mode and display CPU, electrically-controlled valve CPU,
Second CAN bus 307 establishes data communication for underlying protocol using C1939 communications protocol and chassis ECU, engine in situ, reads
It takes engine related data and controls engine speed.
Display CPU is keyed respectively with program A, program B, interior press, and program A contains all of negative pressure homepage 201
Control content, program B contain all control contents of positive pressure homepage 301, and interior button includes：First Macintosh 202, second
Macintosh 203, third Macintosh 204, the 4th Macintosh 205, the 5th Macintosh 206, the 6th Macintosh 207, the 7th Macintosh
208th, the 8th Macintosh 209.
Electrically-controlled valve CPU respectively with flow sensor, be drivingly connected, flow sensor includes：Foam flow sensor 104,
Water flow sensor 126.
It is in order to more convenient accurate that wherein foam flow sensor 104, water flow sensor 126, which access electrically-controlled valve CPU,
Control its valve opening, the H-bridge circuit that driving is made of high-power V MS pipes so that driving is safe and reliable.
3 large capacity CPU are utilized in whole system, and pass through CAN bus technology and organically merge into each other, and solve CPU
Between mutual communication, increase the operating function of interior button, the structure for simplifying system so that 3/10 hardware of system is two
System for, that is, expanded system application field, in turn simplify system structure reduce cost, largely improve it is entire
The reliability of system.Everything has fully demonstrated designer and the skilled of computer program has been used, to the abundant of positive and negative pressure system
Understanding is a with uniqueness, advance, the design of science.
Specific embodiment of the utility model is described above.It is to be appreciated that the utility model not office
It is limited to above-mentioned particular implementation, those skilled in the art can make a variety of changes or change within the scope of the claims,
This has no effect on the substantive content of the utility model.In the absence of conflict, the spy in embodiments herein and embodiment
Sign can be arbitrarily combined with each other.
Claims (5)
1. a kind of intelligent froth ratio mixed layout structure of Integral positive/negative pressure including foam tank, water pot, positive pressure system, is born
Pressure system and control system；
Positive pressure system includes foam pump, foam transfer valve and prefill valve；
Negative pressure system includes pressure water valve, positive pressure foam valve and Venturi tube；
Control system includes electrically-controlled valve, display and programmable logic controller (PLC)；Wherein
Foam tank is connect with foam pump, and foam tank is connect by electrically-controlled valve with Venturi tube and positive pressure foam valve；Water pot and Wen Qiu
In pipe and positive pressure foam valve connection；
Speed probe is equipped in foam pump；
Foam two position sensor is equipped in foam tank, water two position sensor is equipped in water pot.
2. the intelligent froth ratio mixed layout structure of Integral positive/negative pressure according to claim 1, which is characterized in that bubble
The import of foam pump is connected by y-type filter, foam valve and foam tank；
The outlet of foam pump is connect by prefill valve with foam tank；
Single-phase valve is connected between the import of foam pump and the outlet of foam pump；
The outlet of foam pump is connected by the import of return valve and foam pump；
Inlet of the outlet of foam pump respectively with foam transfer valve and electrically-controlled valve is connect.
3. the intelligent froth ratio mixed layout structure of Integral positive/negative pressure according to claim 2, which is characterized in that electricity
The outlet for controlling valve is connected by the water inlet of positive pressure foam valve and water pump；
The water inlet of Venturi tube is connected by the water outlet of pressure water valve and water pump；
Outlet of the foam inlet of Venturi tube respectively with positive pressure foam valve, electrically-controlled valve is connect；
The mixture export of Venturi tube and the water inlet of water pump connect.
4. the intelligent froth ratio mixed layout structure of Integral positive/negative pressure according to claim 3, which is characterized in that
Flushing valve is connected between y-type filter and the foam valve and outer for foam valve.
5. the intelligent froth ratio mixed layout structure of Integral positive/negative pressure according to claim 3, which is characterized in that
Foam pressure sensor and foam flow sensor are connected between the outlet of foam pump and the inlet of electrically-controlled valve；
Water pressure sensor and water flow sensor are connected between the water outlet and pressure water valve of water pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720401242.0U CN207545664U (en) | 2017-04-17 | 2017-04-17 | The intelligent froth ratio mixed layout structure of Integral positive/negative pressure |
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| CN201720401242.0U CN207545664U (en) | 2017-04-17 | 2017-04-17 | The intelligent froth ratio mixed layout structure of Integral positive/negative pressure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115634403A (en) * | 2022-11-09 | 2023-01-24 | 徐工消防安全装备有限公司 | Foam mixing device, system, foam fire fighting truck and method |
| CN115814312A (en) * | 2022-12-14 | 2023-03-21 | 徐工消防安全装备有限公司 | Compressed air foam lifting jet fire engine |
-
2017
- 2017-04-17 CN CN201720401242.0U patent/CN207545664U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115634403A (en) * | 2022-11-09 | 2023-01-24 | 徐工消防安全装备有限公司 | Foam mixing device, system, foam fire fighting truck and method |
| CN115814312A (en) * | 2022-12-14 | 2023-03-21 | 徐工消防安全装备有限公司 | Compressed air foam lifting jet fire engine |
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